BE633663A - - Google Patents

Description

       

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 EMI1.1
 



  1 M3c'-tiD <î-out: il minio of a chsoE; eur cl1 tools ".
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  Has the Invention prbannie paid off uno handle? günhralc ù a mçaQ1B # e da chnnueraont of toola for a machine-tool, and more <: rticul1r \) Glcc.t a perfected tool changer with cō devices. :: 3: very high: i3.



  The present invention relates to a tool changer
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 perfected for jchan3er dos tools between a spindle of a 7.3- c1no-out11 13t a tool storage device.



   The present invention is further characterized by the following points:

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 EMI2.1
 ..- * - JMt ....., p- # - silo violate a mc.wt: r.so ch: n Îcu 'outtia dan le;, u31
 EMI2.2
 - # * # -i to <w-lili: Ot1t t; 1:;: i: 1to: 1u ::; from r '\ on reltivî. ent free nu cours de '1' * -rch4e tics') l1tiLl 4Q ';, H! 1:.: ir.1e ch [1nüur i'ou'.; 1.1, c ont d3-l) ltc6 d'une soûle VC; U <J;) :: J.Jl '.; Ctivc J'1: 1t J;: 111: J au rroins three plans of dp13cu: ent dif- -'- rt4.i;. ::; ; "-.:;" "'ld, it; u:' C.lOi: J: 'lÙ' l: u.t 'd', uti: ;; <JO: l) ot'to UII 'happa ..



  '"'14, 1t .'c.ni.: R.': O CI% 0.01-to a slide, j v.if lu b.lt; '., O, II ,; <;, 'l: i: \. 1 \ 1, Ii -1'111'1'1 to limit the rotational movement do ce :: \ "c, i ::' \ <J; - the invention concerned. ;; ale ..at a warehouse
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 EMI2.4
 tools in which the tools are '6ioss following a conical aisposi- tian with respect to the axis of rotation', tion of the angaain or loader; - the p6cunioo chncur of tool has an amplified lock <5 ot actuated to fix the tools 4:, na ce x'cnni3 io "> u during a cycle s; a change of tools, and this locked is actuated following a diplncenont to change the tools: the machine-tool included a fiisplified indexb system deotiné it a tool storage organ;

   
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 - we designed a new device to encode the
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 pl '\ 1mi;)!' tool of a group of tools arranged in succession and bearing
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 ts by an indexable tool storage drum and this
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 ro that the starting l "1t.t of said roupo can be faoilc.nont 1 <100- tifi-î? - at u co. ^. çu a tool storage device ot a c <ni3c tool changer both made up of a single piece and can be applied: lu5s 3 uno miechlce-tool fitted with a bro-
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 che tool holder;
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 - the selected tool changer can be used with one of several types of tool atock-see caps;

   - the machine tool coport.o a perc \ t1oQnS device
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 tool storage is a perfections device of ehaooent E tools c ':: c3sita: \ t ue;: 1ini ::. u; ::. of cooperating pitr43s and with a.:. inimu- de: aouci,: nts de co :::. ',: .. cd n.': c'3ssrirs to operate a c: - :: .'.-,. , 1 ge of tools;
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 said: cni3a chinjour of tools turned pro5rasivet,. more do} 6CO in two successive cycles of f.C.Z: .I.,.? tool;

   D un or 30ne the goal of, l; iable of a block li; -, i t,:! rot2- - :. 1 (". '" of tn': C! .ln.13 ') O:'): 1cur of eyelashes and pepper to place with precision 3a at: GttG8: .3 Eyelash : ü, rE '! 1Z of tools in a locked-in position, aligned to introduce tools in a spindle and a feeder
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 do storage, rcspcctiveeut;
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 the tool storage m3sslc has a do air vent; ¯ new pivot supports, intended to support tools; a new and improved trlnlery mcun1s: rotates a tool holder from an index position to a ch: 1cS station, ;;;> 1eo.t I tools;

   
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 the tool storage magazine contains a series of
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 swiveling supports for tools sup-ortôs of :: l1: lnidre that each support .d'tool is moved3 until it meets a fixed stop rand -it is in the station of tool chaneaent3; h finally, the tool storage druma has several # .; swivel tool supports which bear against a chenin de Ull 1ge; vfixe during the Douv8roent indexing.



  ConfozaQnt 1 the present invention, the \ Iena! Ideresse 'designed a machine-cutil per.f0ctionr..5o conportont a bûti and U: 1' rotary spindle with a loader or a storage of tools i '-iQxc - 'ole as well as a m: canic:.: o ch ne ent tools coopiraut, Lez. f /, isagaain or. Day chariot is mounted so as to ôtro indexa on the. p-irtic f sup.5r10ur 'of the machine tool while lo .., cani ". w: e of c;, n;' 1ûnt x tools ost supports a block at a distance duo the spindle and the : .1 storage. The oc "n1! Jr :: e of the * chanjfs'.ent tools worked tjoiu- | . perform a tool exchange between the m: 1SJin, 1 .; 9to-: k.c and the bro- 1-

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 che when it receives a predetermined signal given manually or transmitted by a sutomatic programming device.



   The tool storage magazine is mounted in an inclined plane on the upper part of the frame and has a series of peripherally spaced bored openings in a cone of revolution with respect to the axis of the drum. and which are mutually disposed to releasably support a series of tools.



   The drum being supported in an inclined plane so as to be able to turn, the bored openings as well as the tools being arranged in a cone of revolution about the axis of rotation of the drum, the longitudinal axis of each opening. The bore is arranged so as to be parallel to the longitudinal axis of the spindle when the tool carried by the corresponding bore opening is in the tool changing station. Due to the fact that the storage magazine rotates in an inclined plane, the longitudinal axis of the other tools supported according to a cone of revolution in the periphery of the magazine is inclined with respect to the longitudinal axis of the spindle in that they do not are not in the tool change station.

   However, when each tool is brought into the tool changing station, its longitudinal axis then becomes parallel to the longitudinal axis of the spindle.



   In a variant of the tool storage magazine described above, there is provided a tool storage magazine having the same diameter as that of the embodiment where the tools are arranged in a cone of revolution, but having a capacity larger tools. To this end, in a magazine having approximately the same diameter, the tools are carried by pivoting supports mounted so as to effect selective outward pivoting in closely spaced radial guide slots machined in the periphery of the drum.

   The modified magazine is mounted so as to rotate in an inclined plane on the frame of the machine tool, the respective pivoting supports of the tools being normally held in a

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 index position in which the longitudinal axis of each tool support is parallel to the axis of rotation of the magazine. the
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 tool supports as well as the tools are SUid3 and mlntor.u in the non-oxidized position at: 2 means of a guide churain J: '. have-.J concentriiucaont with respect to the axis of rotation of the agsin.



  In the modification of the tool storage ro.1t :: aln,, the assembly planned for the last co is identical to that which was t, provided for the r, jall'ition mode. main. As a result, the two types of tool storage magesias are interchangeable, which gives the machine tool greater flexibility in use.



   To remove a tool from any of the pivoting tool supports, the magazine is indexed until the chosen tool is adjacent to the tool change station. A motorized actuator, connected to a movable section of the guide path, is then actuated to rotate the tool holder
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 thus -ue the tool to the tool change position.



  In the position of the tool stack, the longitudinal axis of the tool is parallel to the longitudinal axis of the spindle.



   The tools are exchanged between the storage magazine and the spindle by means of the tool changer mechanism. The latter coa-
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 carries a movable sup- port from a block, so as to move axially as well as to rotate to perform a tool chanc. This support has at its extracts 9 opposite dQ3 empty.- gents 1GtiD enter 3inultanén; ent a tool in the tool changing station and in the spindle during a cycle of tool c3ns- enta. To fix each tool in its cor¯ ^ 3 ”v1üent: - during the rotation of the said support, each 5vicct includes a ct1or1 lock following a tool chain.



  In a typical machining cycle, we first place los or-
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 , .tils in the tool storage maZa3in in the successive order ..of their use. To identify the first tool in the cycle

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 'uD1o, it is un1t a porto-tool identified by a code to facilitate the idontiric3tln code of a group of tools arranged in succession.



  A cycle of tool chsnLC.ant is com ^: enc5 by an ind ') xa;:; magazine Until the first tool in the machining cycle is identified and placed in the tool changing station, with a view to its subsequent transfer to the spindle. The D1003- nisma of cb3n,; eiont ofTectue ofTectue then Unchanged tools between the magazine and 13 spindle. At the end of the machining operation with the first tool, this is added to a stock store and at the same time the second tool is transferred from the aagnsin to the spindle.

   It can be seen that because the tools are supported in the successive order of heavy use, each subsequent tool used in the cycle
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 The machining is brought to the tool change position with an incremental indexing die cast. The features of the present invention and others will be better understood by reading the detailed description which follows. followed by an apparatus, given by way of illustration and without limitation and with reference to the appended drawing, in which: - Figure 1 is a front elevation of the upper part
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 top of an on-machine machine with 16.:. Tool storage scCaisme and the tool changer z5caniswe, both made from a single block;

     - Figure 2 is a vertical cross section trag-
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 ;: - oatiL: 'a,. ^ rn3a -3chells d3 the su5r1our3 part of the oc- chine -til and prncigalecat illustrating the oacaniajse tool changer and spindle; - 1s figure 2. r ?? r4s'3nt: a detail of figure 2; - Figure 3 is a side elevation, with partial section, some parts being torn off to make
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 appear the storehouse and chan's a4canism [jûaent from where- '
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 ,. tils we see in the extended position to remove bzz tools

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 Figure 4 is a fragneatary view of the 5ca-
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 seizure drive mechanism;

   
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 - figure 5 is a large-scale frasas ntairo view of the p05itionncwQt latch activated by a spring and of one
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 positive stop fingers used: to place the storage drum
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 tools diD.3 a position of in.1ex3 ...; e chosen; - rGro 6 is a view fraentdlrù das par - * - oatils illustrating the difference in the size of the porto-tool bodies to constitute an çodie identification for the first tool in a machining cycle, by report (J.U: 'other tools;
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 - Figure 7 is a vertical longitudinal section through
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 tiella of part of fieure 2; - the flbmre 8 is an elevation, with partial section, illustrating in detail the c6c: gripping and locking olse: 'a tool in 1 L-ic; enisme chan: am9nt tools;

   - line 9 is a fragmentary, large chello face 5l5vtion of one of the tool holding devices Pt it shows how much detail a tool is 6! 9 radial displacement of c6ntrsGe; - Figure 10 is a view through -g of Figure 3, and it shows the position of a limit switch i lr relative to a stop finger used to control lo, ixial dôplucenent
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 \ the tool changer;
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  <: - figure 11 has a diagram of the dc circuit cO:; u: 1 <1nc1o; ly-
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 hydraulics went up in the tool-machine;
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 '- the figurco l4 to bzz are views sch: r.l: lti; u () s. live feeling different d.5p: "cwenta ax5cuts by the tool heat; during a collet cycles of ch1nccI.t; C.t of tools;

   - Figure 13 is a view rr3.ot1t; .ire d'una v3ri.:1tt) of the tool storage drum, illustrating the pivot-nts supports? dloutl1c, cetto seen as a: l: front vntion with partial cut:

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   - Figure 14 is a vertical cross section il-
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 shining the: C3 ". ZàRP of linkage 3erv :: J.nt: \ co-a-nder the positioning cover 01-" Radial effect will vera the outside of a tool support from its indexed position recalled; - Figure 15 is a perspective view illustrating more
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 in detail the ::. 1cani ::: r.e de tri.n, teric for pi..mot3nts tool supports;

   
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 Figure 16 is a large-scale fragmentary view - showing in detail a spring loaded locking mechanism, and specially adapted to control the reverse movement of tapping tools - Figure 16 :. is a frúntalra front elevation view of the machine tool, showing a self-tapping tool holder
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 inversion, in a position where the control mechanism of 1 figure 16 can meet; - rure 17 is a partial view of the hydru11 circuit. as in FIG. 11, illustrating a modified hydraulic circuit not mentioned in the variant of the invention as shown in FIGS.
13, 14 and 15; - Figure 18 is a diagram of the electrical circuit mounted in the machine tool;

   FIG. 19 is a front elevation of a machine tool comprising a modified tool storage device;
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 - the fib-ura 20 is a schematic plan view of the variant of the invention shown in Figure 13, as seen from the Ions of the inclined axis of the tool storage drum.



   We will now refer to the drawing and more particularly
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 .-Lover in Figure 1 which shows a machino-cutil comprising the various g, nr2ux means of the present invention. As shown in this figure, the machine tool generally comprises: a base (not shown) provided with a vertical column'26 having

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 a: upper ljâ'1A pi ae 27. Un Dîti ib lf t1t a.; t: r [II) pi-- i te of the form c ..;, 1 = '.. e; t.ir; ort.nt against 1 surface 7 ouï fi / 'la adonne .5 by' ic ,, studs filet4a; il.

   The frame 2 & a.:p¯crt3 on V1l0 1'1 ii rotation u 1:, as) :: J1.n or drum j: of stored 1 1 O'- til-j 1 '-' 1 "an Inclined plane , e, J,., '11ù..t: aur 1-ï <ï fiurois 1 and; # Cc, ", ': 1 (jln \' 0t..or *: o une p; ri; h ri chnfJ. '. in: & jw (; rde the most 3lou:" j O'.l ' <; :: - turf) 6 ll} 3J03 j; J p'Jt'1ph ':' r1 '). 1,: tfJ! lt e3pjc-5o3 and coruti.- taaiifc des 3s; SiGmcnbs do aocKtys for 8 bringing tools , such as 100 tools 35, j6 and 37 coitae Shown in figure 1, which are 361ot1vJent amended in a 1-tool chnncoceat station, carrying in its en3eoble 1. \ 1 rifirenco 8. Each opening 31 ... session 3 or: The tool storage tide is machined in the; 4rihJ- ria at a predetermined inclination such that the longitudinal axis of the opening 7.ssve intersects the axis of rotation of the) tt.1zcoic. , 2.

   Aina! '1 when in collectively the openings al & D3 and the
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 tools that they carry soct arranged according to a cane of revolution with respect to the rotation of the drum. The inclination of the or-
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 verturdS alôs'Ses 35 by repport to the axis of rotation of the drum is canvas only when a tool carried in the alaée opening is found j
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 EMI9.5
 in the tool chansecont station, the longitudinal axis of the tool is parallel to the longitudinal ixo of the spindle.

   As a result, a tool will be easily positioned when it is in the tool changing station, whatever its radlalesont position; inclined that end it is not in 10 chanseacat station; of OUvil9. h, In addition to the store 32, the frame 28 supports 5GleeQç, for a relative movement of a single block, a, ....: ccn1s :: 1
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 obstructing tools or tool transfer device wear in
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 its enaoable to the reference: 39.

   This mÓcsQ1srJo includes os'.ontit311omont un aupvort or arm # obil0 40 do change; of tools, which includes the extr1t. opposites of the 6vldemets fiô # i-ciicular 42, (4t k3 de., d.? n.,:, O \ 1, .l ", and which is fixed at the extr; ccit Bictérioû

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 EMI10.1
 of a tree 4- from mznirc to be entirely OBRICED from a3 ± ft ±> in do stock. 30 52 Utio tool broached 45 Want ie tool holder for rotation due to the zoo column. The 45 eai spindle. entriln-5o we rotate --r an actuating device (not shown) and it does support lib ': r: lbl: a tool, tol ius tool 37, CO;: 1 :: IO illustrated on 1 'fi. $ Ur' 1. where tool spindle 45, column 2 <o aot r.gen- c'3 so in ::; 11i '' to provide several orgoues (not shown) of piece support J u: -, iuor ui.:rrOS:s d, o: m1Orc sliding.

   For the purposes of certain rotational movements of the tool holder 40, two fixed stops 47 and 4.9 August fixed Gu btti 8, and a movable xi31een stop 4g is functionally mounted on the frame.



  During the 4th coordinated movements of the magazine 32, of the tool part 40 and of the stop 49 with the cooperation of the fixed stops 47 and 48, the tools are sutosatiqueaot exchanged between the storage magazine and the tool spindle: 5.



  There aontnje of the movable support 40, of 1 spindle 45 and of the goal I strobile 49 in the frame 4b this clearly illustrated in figure 2. The movable support 40 is fixed3 to the outer end of the shaft 44, the cent- .left part of the latter being added to a pad 92 mounted in the frame 28 and the end of
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 right of this erbro comprising outer grooves 97 cooperating
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 rant with internal grooves 98 utinéeo on an end sleeve
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 rotary drag HERE.

   Towards its central rimmed part, the tree
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 is aont3 in rolls 93 and 54 which constitute a rotary connection with a block of :: 10ntEJf; G axially movable 9Q The sleeve d1 drove HERE turned in two bearings 102 and 103 moat6a iana the loti &, and it is entnîm in rotation by a pinion 1C4 of screw 3 (\ n3 end: have (by splines on the end * - of the right of the sleeve. The endless via gear 104 is fixed z1 Itxtr1lt 'splined of the drive sleeve 101 by a 4cruu 108 Tiaaé on Ilextrmit4 of the sleeve, and it is blocked there by a stop via 109 ..



  The worm gear 104 is Aïxea4 ea rotation p * r uû via ..., ¯: t '

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 EMI11.1
 without thread 110 meshing with this and çlavot4o, è a shaft 1, - - of a hydraulic actuator 112. ..: C ;, '#' The outer or left end of the shaft 44 this tixde uu mobile support 40 by a pipe 115 and threaded studs 116 and 117 coe can be seen on the fiares I * and 2, the shaft being introduced 4atw a guide opening C1cU.jre 118 arā sào in this mobile oupport . The eflO1itâ of the tree # tPor'e une S ;; slot 121 intended to receive a H; auulacs4 cooperating household on the plate 115. The latter is f4x i to 8ur mQbi, lo, 40 a r the studs 117 to coaplc-ter l '': ii3on, dr.tne.ntr. '.rbr.



  (Soujous 117 pour¯coxpl5ter la l '3oq d lu and,'. ". J! '.>', -,! J, '.., ... r (1!,.'. '' '' ' 'f ..........- (...... ,,: .., ucial displacement <db -eupQor môb7; s .a Y '.'. ' Y'K ,: ositü- 1 a '' T '' 'l'P'! . '! n ..... ""' & F,. by a device 1; sc tiO ..... tt b 1 af '"3. 7' ',,.,, 1331' work at the building 4it 11t.j, f, a $ o xpi:, a i. axially i23 which 'i' i 'axa1elUl! nt mobile 123 which 8t ,. " q, ', T, yj a' and 125. To move the 8 \ 1PPit :( ', Ob1 f¯j) t.>, ... <fi'Y '..ent vrlJ 1..exterior,' Z Y '' 'r t 7tai.'. ' f Hydraulic w ude with O3 near \ '; "t 12.2 by e.wllWaUf; ## tl S # f.' ; left the piston tice 123 tjfefi ij-'l7i.f :. '1f i1ct ment connected to ..' ,,, ".1, .1. Jt '' l: ",. O '. :: .... \. In. Figure 2 t the 1> r cohort a 4pnÙl'Q 1: ,, tu.:, Ai /, being the path of internal bearing of the bearing 9r3 tf..dē dpla ,: cer the shaft ax1 & le: uent towards 11 ': Ór1eu.r.

   For .8 $ Uf '\ 11ai8' dettta4o to recall tree 44. To move it to the .oit ''. . where; v ver 'l'; nt3fiieur, pne washer z131 butts against the çn | e "'¯', nt inside the bearing 94 and. y is held in ',? 1 ....'" "ba # Uo lastiuo 12. It can be seen that the 'end of cltçit' 4 binding 44 is kept in driving contact tvqc la.mqooù eâ nel * S 106 during 'axial displacement ..'. - * 'r- nel 106 G '' 'displacement courry, axial # -' ', zf ..J - In m8r.ut terape that the axial displacement goes to the shank where "the outside of the mobile support 40 and of the shaft 44 will be, the stop "
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 EMI12.1
 mobile 49 is unfolded x181ewent towards the outside with the liver with the orbre 44 and the mobile support 40 ut with respect to these The goal: o mobile con-prnd a shaft 14 + 0 comprising a rim rim 141 which actually pirtic lntsrt:

  .nto and an oro 14 ..: il. its extract 1 cxtrieur &, eo.r.:. e illustrated in the figure The central left partio of the tree 140 coulieacdano soft couasinôça 14d and 144 Kinds in the bfiti its extract 1nt '! ri "tJ.rf). a piston 145 of reduced diameter, which is part * lnt3ructt of the shaft 1-r0, slides in a cylinder 1-. Co last is; support: - dn5 an opening or 360 dom the block 9ô and it comprises a ledge 149 which abuts against a side: of block 96. A baeuo zij kills 150, it abuts against the cat: Op:; 03 'of the block 9% fixes 19 cylinder 14 the entrance to the opening als6. for llecipaèher to diplocate axially relative or block.

   To move the piston 145 to the outside, the cylinder 143 is mounted on a flexible ctnalla-tioa 151 'the lz caD31: u; tioQ 126 to receive hydraulic fluid under prossioa simultaneously with ed18061- tif d'uctionneiaent 122.; i
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 The shaft 140 of the movable stop has a second
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 part due to reduced diameter 152 which leaks part 1nt4srante and which Q 'teni from the piston 145 d: .ià! 3 un u1 :: 1ag (: practiced dj4a lu wall tt :: r:; io - :. 10 of the cylinder 1- + ô, ino via il bpauler4ent 155 pū nie of a new element is screwed :: ¯'-e in the oxtr .: mit of the part of-rbre 152.

   To maintain the shaft 140 in a position rrpc.elue in luelle a shoulder 15? butts against cylin- drc Ili4 c ... Îue., oic that the latter co: .¯uni:; ue with 1 ';; cha Fprat we pr: saw a 15th reassort of which one cxtr1mltJ abuts against the çy- linear 1W and including 11 '.xtr r: it, j op,' ode buta coatrii the record 15a. Therefore, each time the hydroulic fluid ooua prQdon p ', rV1tHlt to the uc.ionriocient device 122 it paryihnt ¯v6lement by 17 horsehair: .liatiow 151 lu cylinire 146 by moving the piston 14; and the lino tree vcrz the outside frur until e9, -which the

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 EMI13.1
 flange 141 of the movable but4o 49 butts against a; 'xfsc $} 4t3e of the movable support 40. near that the movable support 40 9 turns off to the movable goal 4 ;, glue this is pouoeie vera ilex- further until the via to shoulder 15 abuts against cylinder 146.

   A liver the movable stopper fully advanced, the sup-
 EMI13.2
 mobile port 40 lu will encounter after turning 160 * in the forward position, as shown in figure 120,
Tool spindle 45 is supported for rotation by column 26 and is fully spaced from tool holder 40 such that the spindle axis and longitudinal axis are.

   of one hollow 42, or of the recess 43, coincide each time the tool holder rotates from its horizontal rest position to its vertical tool burst position shown in Figures 1 and 2.

   Pin 45 essentially includes a long
 EMI13.3
 tubular shaft 159 ournaafiàdsas bearings 1? C1 '/ 1 whose outer raceways are fitted <in column 2o .. * 'To pocket the. spindle 45 to move axially in the bearings 170 and 171, a locking nut 172 is viaae on the spindle so as to bear against the inner race of the hole 171 by pushing a flange z.76, coming from ' a block with the shaft dt spindle 169, against 1 inner rolling raceway of the bearing 1? 0, The outer raceways of rou7.eacats.l? t5f 171 have flanges which bear against the edges formed $,

  cooperatively in the column to resist axial forgings
 EMI13.4
 exerted by tightening the bottom of the nut 1fui2. A stop screw 1? 7 * and screwed radially into the nut 172 so as to bear against the spindle shaft lo '? to prevent said 6th 'where' from rotating. bzz ^ The pin 45 is, entrutaào in rotation in a good way j coaauu by 'un m'Ucanî.1t.4' (non 'rur # ants ton à v # apsse Variât can! atri <ntlMtiVOB9 !! tMl t.i'Uh WuVm! * ## "'pi, nàao' tfoitâ 160, 11 ax'A'3rlcnolûre'a r'i-d; lbroi6. ' - '".7 ^: ¯¯ ;; ..¯ '-.' RrYY: vi r..¯- .. ¯ '-.-.' T., ...... $. ' r. . ¯ ... ':. x.1¯S ..: r.'ī ..- ,:

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 EMI14.1
 so said to fix pi-r make the pestles lbO and 11 îjiafjpra of 1 brochas l1 oxtriir.it:

   rear ll ,, irbrç., do spindle 3.6, w. uti spit fren the? rationed hydruu'Liqtî4iic-nt, of which dhe r44tio is attached to tree 1; ut whose bat fixed to the column = by -les cjoujcna 190 whose and po- pr'sctitj on figure J. Fluid hydr-iuli 4uo under p6f; sion is er.voy .: nu brake 1C7 by a can ' iluution 1; 1, for the scrcuc ot anchoring the rotation of the spindle 4 .. The exhaust of the hydraulic fluid under since lu con; -. li3ution 11 rot a .a the spindle of Stro input: e by the lor-, do selective solidoriaa- tion. -one main clutch cora =: apdS aconiqu9! aopt (uon shown) nonti 4 and funCionurint in. said traaoiaeion.



  To facilitate a tool chain :, the spindle 45 has a horn 'aut03.ti.ue 14 constituting an Iispositif ,, for locking tools Electivcent libûrablo. The horn 194 has a cylindrical interior id'1- so that it can be extended exially in a chumbr-ie draws sheet of the spindle shaft i69l The hub of the month 194 is an integral part of several customary ouementa of grip 14. '. to.ter.3ant forward and 6laatiquoent exx7, .n- si: the. Consequently, each time the jtors are 4v-pJ. & Ci uxial- cent forward, its individual segments c * separate the radial sounds to free a tool holder.



  : during the cxiul blocking uouvecent from aors to ll:. behind, an opening coe; i ¯;: c 1.1 nnuE: e c'.sar there spindle tilen- jac on the periphery df fcr .: co-.plcntcire coniotia dea soj- = entry of jaws 1 ':. 4., by cozpri2ant to lec tighten it strongly on the shank of a tool holder, such as the tool holder' 5? B illustrated on fi jure J. ran from soi dp: ncecnt xial d'.s one acra or the other, the horn n3 can be pc3- turn çttçe a groove of the cluvftco 4Q5 Caii: c in don aoyu, -.lcno 1, Q1 9t ttoat-io a clavetto ' --04 fixle to 14spindle shaft. 19. ¯ - oven cause 19 isouvâaont uxioi duno un 0 * "-OR * daM,

  <Desc / Clms Page number 15>

 the other, an axially movable control rod 196 extends into the bored opening of the spindle shaft 169 and is screwed at one end to the hub portion of the jaw 194.



  A thrust ring 197 attached to the inner end of the actuating rod 196 bears against several Belleville washers 202, the opposite end of which abuts against a thrust washer 203 which bears against the inner end of the shaft. of spindle 169. Therefore, since the washers 202 are placed between the spindle and the thrust ring 197, the tigo 196 is continuously pushed inward to keep the jaw 194 in an axially inward locked position. , as shown in figure 2.



   To release the jaw 194 prior to a tool exchange, a locking release cylinder 198 is provided, which is attached to an interior wall of the frame 28, and has a piston rod axially aligned with the rod 196 actuating the more. The admission of pressurized fluid through a line 199 actuates this cylinder to move the actuating rod axially outwardly by compressing the washers 202 and correspondingly bringing outward the elastic jaw 194 to its position. unlocked position. At the end of a thread exchange, the hydraulic fluid line 197 is brought into communication with the exhaust, which stops the operation of the blockage release cylinder 198.

   As a result, the washers 202 expand again to push the actuating rod 196 inward to move the jaw 194 axially inward to bring its segments against the next tool which / is introduced in order to unlock the jaw in a positive way. carried To place a tool for exchange with a tool / by the spindle, the tool storage drum 32 is rotated in a chosen direction by means of a hydraulic motor 215 (FIGS. 3 and 4), mounted on a transmission housing

  <Desc / Clms Page number 16>

 
216 fixed to the frame 28. A shaft 217 which rotates in two bearings 218 and 219 mounted in the housing 216, is connected to a drive shaft 220 of the hydraulic motor 215.

   This shaft is mounted in a cylindrical bore 223 machined into one end of the shaft
217, and a key 224 mounted in respective opposing keyways in shafts 217 and 220 complete the drive link. A worm 227 keyed to the shaft 217 by a key 228 meshes with a worm gear 229 connected by splines to an equally splined extension of a shaft 230 driving the storage drum. The shaft 230 rotates in two bearings 233 and 234 mounted in a bored opening machined in a boss 235 of the transmission housing 216, as clearly shown in figure 3. The upper central part of the shaft 230 has a shoulder.
236 which bears against the inner raceway of bearing 233.

   In the immediate vicinity of the shoulder 236, the shaft
230 has a flange 237 which comes in one piece which abuts a boss 238 of the drum 32, the upper end of the shaft.
230 being then engaged in a bore 239 machined in the boss
238.



   Peripherally spaced threaded studs 240, one of which is shown in Figure 3, secure drum 32 to flange 237 of the drive shaft. In order to drive the drum 32 in rotation in the direction of clockwise with respect to FIG. 1, the pressurized fluid is sent to the motor 215 through a line 243 (FIG. 3), while a line 244 is simultaneously placed in communication with the exhaust. To drive the drum counterclockwise, the pressurized fluid is sent to the motor 215 through the pipeline
244, while line 243 communicates with the exhaust.



   As illustrated in Figures 1 and 3, the drum 32 is indexed in the direction of clockwise to place a tool chosen in advance in a tool changing station.

  <Desc / Clms Page number 17>

 generally bearing the reference 38. As a pre-;

     It is pointed out that the tool changing station is in its final position in which a tool is held in such a way / to be picked up subsequently by the movable support 40 and to be pulled transferred to the spindle 45. Because the drum 32 is mounted on frame 28 so as to rotate in an inclined plane, as clearly illustrated in FIG. 3, and because the tools are arranged in the bore openings 33 in a cone of revolution with respect to the axis of rotation of the drum 32, the arrangement is such that the longitudinal axis of a tool, positioned by the drum in the tool changing station 38, lies in a horizontal plane parallel to the longitudinal axis of the spindle, Conversely,

   when any tool is arranged exactly opposite the tool changing station, the longitudinal axis of that tool lies in a vertical plane perpendicular to the axis of the spindle. When a tool is placed at any position on the periphery of the drum 32, its longitudinal axis will be inclined with respect to a horizontal plane and a vertical plane, Because the recesses for the tools come out fixed in the drum,

   it is specified that the indexable movement of the drum operates the positioning of a tool directly in the waiting station in a position allowing an immediate exchange
It goes without saying that other inclined arrangements of tools in the drum which ensure an arrangement of the tools and according to a cone of revolution can be used to give the same result j and come within the scope of the present invention,
Selective indexable drum movement is controlled! by an apparatus clearly illustrated in Figures 2, 3 and 5, which is a tool positioning apparatus, in addition to the hydraulic motor 215 and the associated drive mechanism described above.

   To selectively and precisely position each bore opening or recess .33 of the tool holder in the tool changing station 38, the drum 32 has a series

  <Desc / Clms Page number 18>

 of fingers 251 peripherally spaces, each of which * and fixed to the lower edge of the drum by two bolts 260,261, comrue shown in figure 5. Looking again at figure 3, it can be seen that the fingers 251 have been supported in one piece at some distance from each other, and that each finger is disposed in a predetermined position with respect to a corresponding opening among the bored openings 33 covering a tool.

   As the drum 32 rotates clockwise, the chamfered faces 251A of the fingers 251 successively bear against a lever 262 (biased by a spring), which is articulated to a support 263 by an axis hinge 264 with flange. The bracket 264 is fixed to the transmission housing 216 so as to articulate the pivoting lever
262 so that it can pivot relative to the rotating storage drum.

   A spring 265, one end of which is attached to a pin
269 secured to the support 263 and the opposite extract of which is fixed to a pin 270 secured to the lever 262, pushes the latter clockwise, with respect to FIG. 5,
Not only does the pin 269 behave as an attachment point for the spring 265, it also acts as a positive stop piece for the lever 262, when the latter is pushed clockwise around the lever. axis 264.



   Retort as previously described here, the indexable rotation of the drum is normally clockwise, in accordance with the general means of the present invention, retort shown in Figure 1, with a displacement of final positioning taking place in a limited way in the reverse direction of the hands of a watch.

   However, it should be understood that the present invention is not limited only to a clockwise indexing movement, but that it can be modified with small changes to achieve slack. indexing normally counterclockwise, and in this case the limit final positioning movement would take place in the sound system clockwise.

  <Desc / Clms Page number 19>

 



   Except in the positioning of the first tool of a group of tools, the indexing movement in the direction of the hands of a watch is done in succession, each indexing movement being an increment for positioning each tool. next of the group to the change station 38 in a predetermined order.



  As the drum 32 is successively indexed by a position in the direction of clockwise, FIG. 3, the chamfered face 251A of one of the fingers 251 successively bears against the lever 262 as well as against. a reversing control limit switch 271 fixed to the support 263. The limit switch 271 is completely away from the lever 262, so that the particular finger 251, which then controls an indexing movement , first operate the positive stop lever and then continue to move clockwise a sufficient distance to allow the lever to return to its normal position before operating the end switch. race 271.

   Once the electrical system has been suitably conditioned, again it will be described more fully below, the actuation of the end of course switch 271 for reversing control causes the final rotation of the drum 32 in an anti-clockwise direction. 'a watch to advance the corresponding tool in the tool change station 38. Rotating drum 32 counterclockwise causes the perpendicular positioning face of finger 251 to move, ultimately triggering lever 262 to bear against the positioning end 272 of lever 262. which is elastically retained in its indexing stop position.

   In order to obtain an adjustable indexable positioning) t of the tools in the tool changing station, the perpendicular positioning face of each finger 251 is provided with a set and stop screw 275 to pre-determine. mined the appropriate spacing of the indexing positions of the drum determined by lever 262. It can therefore be seen that when the drum rotates counterclockwise, one end

  <Desc / Clms Page number 20>

 of the adjustment screw 275 which is fixed in an adjustable manner against the corresponding finger, comes to bear against the easy end in position 272 of the trigger lever 262, which determines the final positioning of a tool in the drum 32 in the tool change station.



   Each tool in drum 32 actually includes a work tool and a tool holder. However, for the sake of simplicity and clarity, when referring to a tool it should be understood that it is the tool holder as well as the tool itself. Thus, in a typical machining cycle, a tool carried by each of the bored openings (or tool holders) 33 in the drum 32 also includes a tool holder. Each tool holder 33 has an inwardly extending boss 280 intended to slide against and support a tool, as illustrated in FIG.
3. To retain any tool in a cooperating recess
33, there is provided in each tool holder a spring loaded retaining mechanism 281 of a well known type.

   A spring-loaded spring of the retaining mechanism projects radially inwardly of each recess so as to enter an annular groove 282 formed in the periphery of the tool holder, as illustrated in FIG. 2. , to hold the tool liberally.



   One of the new features of the present invention is the simplified indexing control system for the storage drum. The arrangement is such that, after the location of the first tool in a group of tools has been identified, the drum is indexed in succession to present the remaining tools of the group in the required order at the changing station. . To achieve this result, only the first tool of a group of tools required to machine a particular part is provided with a coded identification means and is inserted into any of the tool receiving recesses.

   Once the tool is coded. as, for example, the tool 35 (figure 2), was placed in the drum, one
 EMI20.1
 .... '-1 - -.ot.:. "1'., .., '" ...} -

  <Desc / Clms Page number 21>

 introduces other tools * of the group by hand into the empty and remaining openings, in the order in which they are to be used, and into the openings extending counterclockwise from the code tool. After changing the necessary tools in the storage drum as described, it can be seen that the rotation of the drum clockwise will advance the respective tools to the tool change station 38 in. the order in which ila should be used.

   Therefore, no coding is needed on the drum itself to identify any storage openings (or recesses) containing the pre-selected group of tools. Furthermore, since a single coded tool signals the on-going lead of a group of tools in a fixed order predetermined by the drum, it is not necessary to provide an identification coding for the tools. remaining in a group, which greatly simplifies the initial preparation of the tools. In addition to simplifying tool preparation, the system provides an extremely high degree of flexibility in its mechanics use with a minimum of cooperating parts and associated electrical control elements.

   A tool group can be made up of any number of tools within the storage limits of the machine tool, i.e. the total number of storage recesses available * The system is also effective in the event that a particular workpiece requires a number of tools which are considerably less than the total number of storage recesses available. It will be assumed, for example, that a workpiece requires a program of four machining series with four tools respectively present in a fixed succession and being necessary to perform these operations.

   In this case, the four necessary tools would be introduced by hand into the storage drum in four adjacent recesses in a predetermined fixed order extending counterclockwise, the first tool of this group being provided with a means of identification code.

  <Desc / Clms Page number 22>

 in succession the remaining tools of the group at the waiting station, as explained previously.



   In a preferred embodiment of the invention, the first tool of a group of tools is coded for a machining cycle by providing the tool in question with a tool holder whose body is larger. long as the remaining uncoded tools supported them. The difference in length of the tool holders is illustrated in Figure 2 and in more detail in Figure 6, with respect to tools 35 and 37.



  As shown very clearly in Fig. 6, tool 35 is the first tool of a machining cycle and, as such, it is coded because it is provided with a supporting body. It is A value longer than the curps of the tool holder 37. Due to the increased length of the holder body for the first tool, the tool 35 activates a running iron switch 286. code identification when the tool is fed by the drum into a position adjacent to the tool change station 38. To get limit switch 286 in an operative position to be actuated by the coded tool, this switch is bolted by a bolt 288 to a backing plate 287 which is attached to the housing 216 by a series. bolts 289, one of which is shown in Figure 3.

   Actuation of the code identification limit switch 286 closes the reverse control limit switch 271 to initiate a slight rotation of the drum in the reverse direction. clockwise, in order to place the coded tool in the tool change station 38. In addition, the switch 2ô6 conditions the hydro-electric circuit to then perform a tool exchange between the drum and the spindle during each machining cycle. As a result, code identification limit switch 286 is operated only by the first tool of a group of tools required for a series.

  <Desc / Clms Page number 23>

 machining cycles, and therefore indicates the starting point for a subsequent series of machining cycles.



   After the start of a machining cycle, the clockwise indexing and counterclockwise positioning movement described above occurs during a machining cycle executed by a tool carried by the spindle. Thus, at the end of a machining performed by a tool in the spindle, the next necessary tool has already been indexed to the tool change station 38 as preparation for the tool change. 'following tools.



   It will now be assumed that the first tool of a selected machining cycle, for example tool 35, has been indexed by rotation to the tool change station 38. As a result, the tool 35 is ready to be transferred to the tool spindle 45 by means of the movable support 40. When the first tool is in the changing station 38, the movable support 40 is in a position. horizontal rest position recalled, in which it bears against the positive fixed stop 47, as shown in dashed lines in FIG. 1.

   To transfer the first tool from the drum to the spindle 45, the support 40 is rotated in a clockwise direction, with respect to figure 1, from its horizontal rest position to a position vertical to bring the recess 42 into contact with the tool 35 loosely held in the storage drum 32. If a tool is also carried in the spindle 45 at this time, the movable support 40 simultaneously grips the tool lying there. in the spit; in this case with the recess 43 as well as the tool in the tool holder 33 of the drum 32.

   This last condition described is illustrated in Figures 1 and 2, on which the movable support 40 is arranged vertically, so as to simultaneously grip the tools 35 and 37 respectively carried by the drum and the tool spindle.

  <Desc / Clms Page number 24>

 



  During this initial tool gripping rotation, the movable support 40 is positively held in a position axially biased by a delivery of pressurized hydraulic fluid to the actuator 122 via a pipe 290, while the pipe 127 communicates. with the-
 EMI24.1
 As described above, the rotation of the {movable support 40 is effected by the hydraulic motor 112 which drives the splined sleeve 101 and the shaft 91.

   Rotation of the axially fixed drive sleeve 101 rotates if-
 EMI24.2
 zultaneme tt two discs 4 control cam 291 and 292 (Figures 2 and 7), which are permanently attached to the sleeve 101 in a position angularly adjusted by adjusting via, such as the via 303 which is shown in figure figure 7 as securing disc 291. In addition to the set screws, cam discs 291 and 292 cannot move axially with respect to sleeve 101 thanks to a resilient ring 304 which keeps the discs pressed against a shoulder 305 forming part of the drive sleeve 101.

   With this arrangement, the cam discs are angularly adjustable on the sleeve 101 to effect
 EMI24.3
 kill the appro / prid timing synchronism of the mechanism for changing tools without pulls displaced axially from their position in order to selectively actuate switches
 EMI24.4
 end of course ** 296 and 299.

   The cam diqque 291 has canes 293 and 294 offset from 1800, and the disc 292 has cams 295 and 296 also offset from 1800. The cams
 EMI24.5
 293, 2,4 ot, lee 2 "111" 23, Z96 turn 4 * n back planes by * Ufc <- the "14t 8dP.C" txt, from Ul4f.Ur4il that ct4mquf # pair of axially spaced CaU8i selectively actuates the limit switches 298 and 299, respectively, the latter being secured by bolts 301 to a bracket 302 which is subject to the frame 28.



   As will be described more fully below with regard to the electrical circuit, the actuation of the Switches
 EMI24.6
 ; .4 r, "..> ': - -

  <Desc / Clms Page number 25>

 limit switch 298 and 299 has the effect, in combination with the electrical control circuit, of axially moving the movable support 40 and its associated mechanism
When the movable support 40 rotates from a horizontal rest position to a vertical tool gripping position, as shown in Figures 1 and 2, two tool latches 310A and 311A, spring loaded, respectively associated with obviously 43 and 42,

   are opened before the recesses receive any tool carried by the spindle and the tool holder placed in the tool changing station, whereby said holder can firmly grip the tools. Because the movable support is positively retained in the recalled position as it rotates from its rest position to its vertical position, the latches are opened when the movable plungers 310 and 311 are brought axially outwardly on. the cams 312 and 313 carried by the frame 25. To obtain this result, the cams 312 and 313 have chamfered or bevelled faces 312A and 313A extending respectively in opposite directions. It can be seen that the actuation of the plungers takes place before the recesses 43 and 42 have totally any of the tools.

   When the plungers 310 and 311 meet the cams 312 and 313, they are moved axially outwards by compressing their respective springs which normally push them inwards with respect to the frame and the movable support 40,
Since the locks 310A and 311A are identical, it suffices to describe one in detail. As shown in Figure 2 and in more detail in Figure 8, the lock 310A is provided with a spring 314, one end of which is abuts against an end face in a recess formed in an end of greater diantre of the plunger 110,

   and the opposite end of which abuts against a cover plate 315 fixed to the movable support 40 by head screws 316.

  <Desc / Clms Page number 26>

 



   With the plunger 310 having been moved axially outwardly by the cam 312, a second plunger 320 sliding in a bore 321 of the movable support 40 is movable in the radial direction perpendicular to the path of travel of the plunger 310. Normally, the plunger 320 is biased radially outward in the direction of the recess 43, retort shown in Figures 2 and 8, by means of a spring 322, one end of which abuts against the bottom of the bore 321 and the opposite end of which butts against one end of plunger 320.

   At its opposite end the plunger is provided with a gripping bar 325 which resiliently secures a tool in recess 43 with sufficient force to extract a tool axially out of its supporting recess during subsequent axial displacement. of the movable support towards the outside In this regard, it will be noted that the recess 43 and the bar 325 have an undercut letter to allow positive engagement with the circular shoulders 37B and 37C of the tool 37, and of which the central part has a smaller, known diameter illustrated in Figure 8.

   The radial displacement of the plunger 320 and of the bar 325 is guided by the bore 321 and by larger cooperating openings machined in two end plates 326 and 327, respectively realistic so as to guide the gripping bar 325. The end plates 326 and 327 are fixed to the outer end of the movable support 40 by screws 328 and they have the semi-circular recesses 43 for gripping the tools, retort clearly illustrated in the figures that both extracted from the movable support are identical, 1, 8 and 9. Therefore, it is sufficient to describe one in detail, as shown in Figures 2, 8 and 9.

   However, it can be seen that the tool engagement recesses 42 and 43 of the movable support 40 open in opposite directions, which means that the initial engagement of the tools always takes place in the direction of clockwise.



   Turning now to Figure 9, it should be noted

  <Desc / Clms Page number 27>

 that the bar 325 is engaged by the tool and that it is solicited in the radial direction only when a tool recess 43 is first brought into engagement with a tool or at the end of a change of tool when it is released * At the start of a tool change cycle, a tool 329, which is similar to the tool 35, comes to wear by friction against the bar 325 by moving it as well as the plunger 320 radially inward as the movable support rotates.

   When tool 329 is fully engaged in recess 43, bar 325 and plunger 320 are again elastically urged outward to prevent the tool from moving relative to the movable support.
To facilitate reinsertion of tools after a 180 change in tool position, the locking bar cooperates with the tool engagement recess so as to exert little action on the tool therein. found to move it a bit radially. Because the tool is held with some play in the recess, the clearance between tool 329 and re-engaged locking bar 325 is extremely small. However, for reasons of visibility, the play or clearance between the tool 329 and the bar 325 has been shown very exaggerated in FIG. 9.

   It is emphasized that it is desirable that the tool be held with a little play in the recess
43, and that this play is just sufficient so that the tool is centered when it is reintroduced into the spindle 45 or into the tool holder 33. Excessive play between the tool 329 and the bar 325 is detrimental because the tool will then not be brought into proper axial alignment with the spindle or tool holder during reinsertion.



   The appropriate radial outward adjustment of the locking bar 325 and plunger 320 is effected by means of an adjustment screw 333 screwed into the movable support 40, as shown in figure 8. The inner end adjusting screw 333

  <Desc / Clms Page number 28>

 viecée in the movable suppert 40, sum illnstré in Figure 8. the inner end of the adjusting screw 333 coaporte an inclined face 334 machined at the inner end of a longitudinal slot 335 made in the plunger 320. The end outer slot 335 sa terminates in a shoulder 336, against which bears a larger shoulder 319 forming an integral part of the plunger 310, for locking a tool in the hollow.
43 each time the plunger 310 is moved away from its contact with the cam 312.

   A second elongated longitudinal cast 338 extends into plunger 320, and transverse plunger 310 of tool lock 310A slides therein. To functionally cooperate with the plunger 310, the slot 338 has a length such that it allows the plunger 320 to move axially upwards without bearing against the plunger 310. Thanks to this arrangement, as shown in FIG. 8, it can be seen that the radial outward position of the plunger 320 is fixed by the adjustment of the adjusting screw 333 and the spring 314 is used to push the plunger
310 and the flange 319 axially inward so that it positively bears against the shoulder 336 and thereby locks the tool shoulder plunger 320 to prevent it from moving radially inward. inside.

   Therefore, the tool plunger 320 is positively retained in its radially outward position whenever the plunger 310 has been moved away from the cam 312, i.e. after the holder mobile
40 has been moved radially outward to extract the tools, thereby locking the tool in the tool recess
43. To facilitate the movement of the plunger 320 and do the bar 325 which is integrally fixed therein with respect to the guide device constituted by the movable support 40, a machined duct 320A longitudinally passing through the plunger opens into a transverse duct / 325A drilled in the locking bar.

   Lubricating oil from a source not shown is sent.

  <Desc / Clms Page number 29>

 in the conduits 32CA and 325A, which are connected in a morne to evacuate the chamber formed at the inner end of the plunger 320 and containing the spring 322. Although the locking arrangement described relates to the recess 43, provision has been made for an identical locking arrangement for the tool recess 42 at the opposite end of the tool holder 40.



   It will now be assumed that the mobile support rotates to a vertical position where it bears against the fixed stop 48, as illustrated in FIG. 1, and where it resiliently grasps the tools 35 and 37 places respectively in the recesses. 42 and 43. To ensure an appropriate elastic clamping of the tools and to ensure an initial incremental adjustment of the angular positioning of the movable support 40, with respect to the fixed stop 48, adjustment screws 340 and 341 are provided in each end. of the movable support 40. Thus, by turning these screws, adjustments are made to determine the initial rotation of the movable support in order to make it properly grip the tools.



   The mobile support being in a vertical position for gripping the tools 35 and 37, as illustrated in FIG. 2, the latter are extracted simultaneously from the tool support 33 and from the tool spindle 45 by a displacement of the mobile support. 40 axially outward. Before extracting the tools, the motorized actuator 198 must first be actuated by returning pressurized fluid to its pipe 199. to release the jaw 194 gripping the tool 37, the jaw being held in a released state until the tool change cycle is complete. The movement of the movable support 40 and of the shaft 44 outwards from their positively recalled position is then effected by the actuating device, motorized 122, which is connected to the block 96 by the piston rod 123.

   When% tree 44 is moved to

  <Desc / Clms Page number 30>

 outwardly, the movable stopper 49 is also moved outward, because its support cylinder 146 is permanently attached to the block 96. In addition, since the cylinder 146 of the movable stopper is connected to the hydraulic fluid line 151, the sending of pressurized fluid to the motorized actuator 122 performs simultaneous transmission; of pressurized fluid to cylinder 146, which then pushes piston 145 outward to the limit of its stroke. In fact, during the vertical extraction stroke of the actuator, the movable support 40 is maintained in its vertical position.

   Consequently, during the extraction, the flange 141 of the movable stopper 142 is urged by hydraulic energy against the inner face of the movable support 40 positioned vertically, as clearly illustrated in FIG. 3. When the movable support 40 begins to move outward, a finger 341. attached to block 96 by bou- loris 342, ceases to bear against a limit switch 343.

   When the movable support 40 completes its outward extension movement to completely extract the tools from the spindle and the tool holder, a finger 345, spaced forward, which is attached to one side. of block 96 by bolts 347, as shown in Figures 2, 3 and 10, actuates another sequencing limit switch 346.



   Upon completion of its outward axial displacement, the movable support 40 then rotates clockwise (with respect to Figure 1) by 180 to put the tools back into position before the return of the tool. lebile support, in order to reintroduce the tools which have been exchanged into the spindle and the mobile support respectively. When the movable support 40 begins to rotate, the flange 141 of the movable stop 49 is again positively pushed against the interior face of the movable support.

   As soon as the latter turns in these-

  <Desc / Clms Page number 31>

 In order to be vertically aligned with bit 49, the latter is pushed axially outwards to the limit of a secondary positioning stroke, due to the continued sending of the pressurized fluid into cylinder 146. On sees that, when the inner face of the movable support 40 rotates, ceasing to bear against the movable stop 49, the latter is displaced outwards until the via 155 with shoulder abuts against the end of the cylinder 146 by further compressing the spring 158, as shown in Figure 2.

   Once the movable stop 49 fine to the limit of its outward travel, the carriage continues to rotate up to 180, to bear against the movable stop, the edge 141 of the stopper being engaged in the slot 350B of the movable support . As shown in Figures 1 and 2, the movable support 40 has soft slots 350A and 350B, respectively made at the opposite ends and in the opposite edges of the movable support 40 having the respective recesses 42 and 43.



   The rotation of the movable support 40 over 180 causes the same rotation of the cam discs 291 and 292 which actuate the limit switches 298 and 299 respectively. These switches, as well as the switches 343 and 346, respectively actuated at the during the axial displacement of the support 40, are arranged so as to operate in combination with the hydroelectric control circuit to effect the sequential control of the movable support.



   After the rotation of 180 of the support 40 putting the tools in position for their exchange, said support and the shaft 44 are returned by sending hydraulic fluid under pressure to the actuator 122 via the pipe 352 and a branch from the pipe to the exhaust. When the support 40 completes its movement to the limit of its return, the limit switch lever 3.43 returns.

  <Desc / Clms Page number 32>

 
341 against the finger / fixed to the axially movable support shaft 44, which activates the switch until the complete return of the support 40. The actuated of the limit switch 343 conditions the electric circuit, so that the support 40 rotates counterclockwise to its horizontal rest position.



   At the same time as the return of the support 40, the movable stop is recalled by the actuating device 122 due to its connection with the block 96 which is connected to the shaft 44. In addition, during This return, the rim 141 is engaged in the slot 3503 of the support 40 and, therefore, it is also moved inwardly with this support. During the return, the cylinder 146 of the movable stop communicates with the exhaust via the hydraulic pipes 151 and 126. However, when the flange 141 of the movable stop is engaged in the slot 3508 of the movable support, the spring 158 does not act at this time to cause an additional relative return of the stopper, although the cylinder 146 of the stopper is rendered inoperative.



   The continued positive engagement of the slot 3503 with the flange 141 of the movable stopper is positively maintained by the motor 112 which is continuously connected so as to push the movable support clockwise until it stops. that the exchanged tools are reintroduced respectively into the storage recess and the spindle recess. Accordingly, during the re-entry portion of the tool exchange cycle, the movable stopper 142 serves as an axially movable guide to keep the tool recesses 42 and 43 of the movable support properly aligned with the tool. storage recess and spindle recess.



   Before the total reintroduction of the exchanged tools into the storage and spindle recesses, the tool lock plungers 310 and 311 are placed axially in contact with the spindle.

  <Desc / Clms Page number 33>

 cams 312 and 313 to release the locks of the tools prior to the return by pivoting of the movable support 40 to its rest position. Since said support has already rotated 180 from its starting position, as illustrated in Figures 2 ot 8, the plungers 310 and 311 are at this moment brought respectively against the immobilized cams 312 and 313. Therefore, when the tools are fully reintroduced, tool locks 311A and 310A are fully released, and cam 341 attached to shaft 44 again actuates limit switch 343.



   Initially, the re-actuation of switch 343 caused by the reintroduction movement of arbor 44 from the support renders cylinder 198 inoperative, which allows the compressive force exerted by Belleville washers 202 to re-lock jaw 194 against. the tool then introduced.

   Then, with the actuating cylinder 122 remaining operatively connected to firmly hold the movable support 40 in its full return position, the motor 112 is actuated to rotate the support 40 counterclockwise 90 'to. to its horizontal rest position in which it bears against the positive fixed stop 47. As the support 40 begins to rotate counterclockwise when it is returned to its horizontal rest position, the slot 3503 becomes disengages from the edge 141 of the movable stop.

   Then, the movable stop 49 is moved inwardly relative to the frame 28 and to the cylinder 146 by means of the spring 158 working in compression, this inward movement under the effect of the spring being stopped by the shoulder 137 coming portor against the rear end of cylinder 146, as shown in figure 2.



   A complete succession of movements of the mobile support 40 during the execution of an exchange of tools between the

  <Desc / Clms Page number 34>

 
 EMI34.1
 storage drum and tool spindle, as explained dec4- dement '# is Teprtaent4e with the seven sch4asalc views; uss constituting the t1gu.r. 12 1 121.

   In the J'vqlt. particular described one retnarquefa q 1 mobile support 40 is arranged in its horizontal position of repoa in Figure 12 so that the receiver 6Y148IDGPt it.2 41ttl is placed so, .a1sr the tool) 5 P-dr- td by the storage taaour 32 as shown in figure 12At 4., At r4a reintroduction of the 4changdi tools into the storage ta'abour and & tool spindle, reappear, as 111us tlt'd to l, fi, ro 12E, the mobile support 40 is root gn meaning "iVtp. 4s p! e dl% 4ne shows its po1tqn d. r'po 'against of' 47 coMte illustrated ar gur; 12F. 'tee' -" ')' "" -: ' \ '-. S --.-' "- 'ilu.tr4,' U" ,, 14, '- ..



  ;.,. h '! t, 4V,' .lsn6.els of the support 40,., 4. ' the hill of ::; ;, '² / 1i. '49 are repr4 .. 'nt4.', Pa 4 -tl .. 'r.¯ a4i> r .. 2F and They are identical to all' el, -, ...., 1! .. t .tU..out 1d.nt1é., iajbroehe 1. ' '; 1 ;;' ,; ',. ss of the singing cycle of utt4 rtpr4-,; ,, .t:. rt] Iy ..y F i 'i! '1 4t <t 61-, '' '. te d: figure, 2 la4u t H.4 "'' '' '' ''" "'1HIJI'; 1 ''! '"' # '% J'mi ",,' r; tii: -: tt ,,, Qonts ': 1, Iabu-4 4 Ee, a., -'Je,. ¯ v'-x' #. I "y. . ,, bzz t '. I! F.:,. ... 0 "" ...,.: 1t ..., :::, .., J; .J ... ", 'vive .. l',; \ tr Irait1t, Í t: 1t: .J. F () I: {,.: I: '1:' 'E, <r., A. ': o', l '... r <'': l''i ;;:; 2 "..r 'if', <'"l;., u' .. '. tt-Q1!, y-' fl \ it '(,., ..,', ..'- '> ;, 0.).' "{' <- "''" ,, 1 '"', '., (,.,', 'F'-' -,,; 'i ...'": 1: J; 4; r7;: t. ;: sort.. i: l1, 1 ritl '; "1"': '"dr ... <: -, Jt6 PO; to 'if.' 'u' 'Ü1j, ..;, ".;. d.

   Sj.g ns .v ug èqu1t ",; UJ .t '1. retôii1èr:' - :. a '' '.'; ', -.' * '.'" .'.- '' '' j ' "; ',.,' ::. t ... r; '' '' ':,., #.,: ¯;:.!, U'J1!'"; 4, ::, "8 p '.T1e1e .3b9.¯ :.; Tnéyaoîpp

  <Desc / Clms Page number 35>

 pressure relief valve 370 is connected in parallel to the pump
366 on lines 368 and 369 to constitute a safety device in the event of excess pressure in the main line 369.



   To illustrate the operation of the hydraulic circuit, a typical tool exchange cycle will be described in connection with the latter and as shown in operation in the figures.
12 to 12F. Reference will then be made to FIG. 11, illustrating the hydraulic circuit as well as to figures 12 to 12F to describe said particular tool change cycle. It will be assumed that the first tool in the particular machining cycle, namely tool 37, is already in tool spindle 45 and that tool storage magazine 32 has been indexed by arranging the tool. in the next cycle, namely tool 35. in the tool changing station.

   In addition, it will be assumed that a machining has just finished with tool 37 and that spindle 45 is still rotating. The tool storage magazine 32 having been indexed so as to present the next tool, in the tool changing station, the drum 32 has applied in an anti-clockwise direction to maintain the final position. of the tool. As previously described, the final position is effected by rotating the drum counterclockwise, moving one of the fingers 251 to cause it to nozzle against the lever 262.

   It is pointed out that the drum 32 is biased in the reverse direction of the hands of a watch during a tool change cycle as well as during a machining and that it is moved in the right direction. clockwise only when it is indexed to present a new tool in the tool change station. To rotate the drum counterclockwise, a solenoid 373 connected to a spool 374 of a control valve 375 is energized to move the valve.

  <Desc / Clms Page number 36>

 valve to the left by compressing a spring 380.

   By moving to the left, the valve spool 374 brings the full hydraulic pressure line 369 into contact with the line 244, via a branch line 376 and a line 377 formed in the pipe. valve spool 374, The fluid escaping from the hydraulic motor 215 then passes through line 243 to a discharge line 372 via line 378, formed in the ti -
 EMI36.1
 valve 374 and a connection channel 379. A valve 381 regulates the flow of the fluid escaping through the exhaust pipe 372 Up to the tank 4 from all the groups controlled by hydraulic means, to the exception of spindle freight 187 and motor. 112.
 EMI36.2
 



  When a signal, controlled by hand or by a program. calls for a tool change, a clutch 41 spindle drive (not shown) is disengaged in a known manner to cut off the drive connection with pinions 180 or 181 (Figure 2) and the shift brake. spindle 187 (Figure 11) is tightened to stop the rotation of the spindle. Operation of the spindle brake 187 is controlled by an adenoid valve 383 having a spool 384 which is biased to the right by a spring 385 in the valve. To apply the brake of '
 EMI36.3
 pin 187, a 1016not4. 386, connected to the 4th valve spool 384 * is under tension so as to move the green spool to the left by compressing the spring 385.

   Once valve spool 384 is in its left position. the pressurized fluid leaves the main supply line 369
 EMI36.4
 and reaches the spindle brake 187, through a pipeline ') 88. a pipe 389 formed by the valve slide and the pipe 191,,. x - - -¯¯ =; s ..: ¯. ! 1, Unqu * li 801'noldt, '6 p: a s,:: v .... 11 oru4ban 4 Jl1!:. Í {'itt ....,., ....,. - ¯I¯ ¯ -. - \:. ': -' '... - .'-'. :: r. "; o. .." ..¯- ': .4'J ",,) 1'., 1 \ 0 '- .. "" \ ..... ¯,! -. Tj

  <Desc / Clms Page number 37>

 the valve is moved to the right by the spring 385 by releasing the spindle brake on? The clutch (not shown) is then connected in such a way as to be united to turn the spindle 45.

   Each time the valve spool 384 is brought back to a right-hand position, a pipe 397. Fitted in the valve spool, communicates the pipe 191 with the discharge bypass 395,
After braking spindle 45 until it stops. the movable support 40 rotates 90 clockwise, as illustrated in Figures 12 and 12A, to grip the tool carried by the tool holder 33 of the drum 32 and the tool in the brochb. During this initial tool engagement rotation of the support 40, the latter is maintained in a recalled position and at the same time it is rotated by the pressurized hydraulic fluid.

   To forcibly maintain the support 40 in a recalled position. a solenoid 399 of a valve 401 is energized to send pressurized fluid to the actuator 122, which pushes a piston 402 to the left, relative to Figure 11.



   The energization of the solenoid 399 has the effect of moving the valve spool 403 to the left by compressing a spring 405 and making the main supply line 369 communicate with the line 352 by a line 404 made in the pipe. valve spool and connecting the line 127 with the discharge line 372 through a line 409 in the valve spool.



   To fairo turn clockwise the movable support 40 when the latter is in its recalled position, as illustrated in Figures 12 and 12A, the solenoid
410 of a valve 412 is energized, which moves the 4U spool of that valve to the right by compressing unreservedly 413, the displacement of the valve spool 411 towards the right.

  <Desc / Clms Page number 38>

 right, the pressurized hydraulic fluid leaves from the supply line 369 and passes, through a branch line 418, a line 419 formed in the valve spool 411 and, from there, it passes through a line 420 to the engine hydraulic 112.

   The fluid leaving the motor 112 is swept to the tank 367 by a pipe 421 communicating with a pipe 422 threatened in the valve spool 411 and by a pipe 423 communicating with the discharge pipe 372. The hydraulic fluid returning to the tank 367 from engine 112 passes through a flow control valve 424 mounted in line 423. Flow control valve 424 is adjustable to vary the discharge rate of the hydraulic fluid which itself controls the flow. pace of the feed of the mobile support 40,
When holder 40 has rotated to its vertical position, as shown in Figure 12A by gripping tools 35 and 37, current to solenoid 410 is turned off, which stops rotation of the movable holder.

   The de-energization of the solenoid 410 results in the return of the valve spool 411 to its central position in the valve 412 under the action of the spring 413. As shown in FIG. 11, the valve spool 411 is placed in its position. central position by the spring .13 which is disposed at one of its ends and by a spring 429 disposed at its other end. When the drawer of 50, pope 411 is in its central position, the channel! Nos 420 and 421 communicate with the discharge pipe 13 by pipes 430 and 431 formed in the valve spool 411.



   When the movable support 40 is in its vertical position (Fig. 12A), the jaw 194 is released so that the tool 37 can be extracted axially from the spindle 45.



  To release the jaw 194, the solenoid 436 of a valve 438

  <Desc / Clms Page number 39>

 is excited to move the spool 437 of this valve to the left by compressing the spring 439, as shown in the figure
11. When valve spool 437 is moved to the left, pressurized fluid leaves the pressure line.
369 and passes through a branch pipe 440, a pipe 441 formed in the valve spool 437 and through the pipe 199 to reach the actuator 198.



   Admission of pressurized fluid into this actuator causes piston 446 to be pushed to the right, which urges the piston rod outward to compress the Belleville washers 202, which releases the more 194. At the same time, the opposite side of the piston 446 is brought into communication with the discharge line 372 by a line
447, a pipe 448 pierced in the valve spool 437 and a branch pipe 449 communicated with the pipe 372.



   Once the jaw 194 is released, the tools 35 and 37 are extracted respectively from the tool support and from the spindle by a displacement of the support 40 axially outwards to the limit of its external stroke as shown in FIG.
128.



   To move the bracket 40 axially outward, the solenoid 399 connected to the valve spool 403 is de-energized and a solenoid 453 is simultaneously energized, which has the effect of moving the valve spool to the right by compressing a spring 454. When moving to the right, the valve spool 403 communicates the line 127 with the supply line 369 by a line 455 drilled in the valve spool 403, to send pressurized fluid to the actuator 122. , which pushes the piston 402 and the support 40 outwards.

   At the same time, the opposite side of the piston is placed in communication with the discharge through the pipe

  <Desc / Clms Page number 40>

 ization 352, a pipe 456 pierced in the valve spool 403 ot the pipe 372. At the same time as the pressurized fluid reaches the actuator 122, this fluid passes through the flexible connection pipe 151 which is connected to the pipes. pipes 126 and 127 ot reaches the cylinder 146 to push the movable stop 49 outwards, as illustrated in FIG. 2. As previously described, the pressurized fluid causes a displacement of the movable stop 49 outwards to bring it against the inside face of the support 40 arranged vertically.

   The subsequent rotation of the support 40 in the direction of clockwise over a predetermined arc at the start of its tool exchange on 130 moves the movable support away from its contact with the movable stop 49, leaving it glued. move axially outward until the shoulder screw 156 meets the cylinder 146, which will be understood by examining Figure 2. Once the stopper 49 has been brought outwardly to the limit of its movement, it can be seen that the rim 141 which it carries is disposed axially so as to enter one or the other of the slots 350A or 350B of the mobile support.



   To rotate bracket 40 clockwise into its outwardly extended position, solenoid 410 is energized again, which moves valve spool 411 to the right by communicating. the pressurized fluid channel 418 with the pipeline
420 by line 419 pierced in the valve spool, as described above. Because motor 112 is operated as described, bracket 40 rotates 130 clockwise as clearly illustrated in Figures 12B, 12C and 12D.

   To limit the clockwise rotation to 180, the support 40 is pushed and meets the stop 49 which has been moved outwards.

  <Desc / Clms Page number 41>

 as shown in Figure 12D, the flange 141 of the stopper then being silted in the slot 350B to stop the rotation of the support 40. Figure 12C illustrates an intermediate position of the support 40 during its tool rotation of 180. , and during which the movable guide stop 49 is hydraulically pushed to the limit of its outer position to stop the movement of the support 40 with the tools axially aligned for the purpose of their reinsertion.



   At the end of the rotation do 180 of the support 40, the tool 35 which was previously in the tool support 33 is then placed literally introduced into the spindle.
45, and tool 37 which was previously located in the spindle
45 is arranged so as to be inserted into the tool holder
33. as clearly illustrated in Figure 12D.



   To recall the support 40 in order to introduce the tools 35 and 37 respectively in the spindle 45 and in the tool holder 33, the solenoid 399 is energized and at the same time the solenoid 453 is de-energized, which moves the valve spool
403 to the left by communicating the pressurized pipe 369 with the pipe 352 by a pipe 404 pierced in the valve spool, which has the effect of sending pressurized fluid to the actuator 122 to move the piston 402 to the left in an abseil race.



   At the same time, moving to the left, the valve slide 403 communicates the pipe 127 (which carries the actuating device 122) and the pipe 151 (which leaves from the cylinder 146, figure 2 , of the movable stop 49) with the discharge pipe 372 via the pipe 409 drilled in the valve spool.



   During the recall of the carrier 40, the adenoid 410 is maintained in an excited state to firmly hold the slit
350B of support 40 continually we pray * with ledge 141 -

  <Desc / Clms Page number 42>

 of the axially movable stop. As a result, the stop 49 then behaves as an axially movable guide part until the exchanged tools have been completely inserted into their respective recesses.



   When the support 40 is recalled, the cam 345 (FIG. 2) stops moving against the lever of the limit switch 346. During full return, the switch 343 is actuated by the cam 341; which produces a signal in the electrical circuit to cut the current to the jaw release solenoid 436. Due to the power cut to solenoid 436, the valve spool 437 is moved to the right by the spring 439, which communicates the line 199 from the actuator 198 with the branch line. discharge 499 via a pipe 457 drilled in the valve spool 437. The pipe 449 is itself connected to the discharge pipe 372.

   Therefore, the piston 446 is recalled under the effect of the pressurized fluid supplied by the line 447 which is connected by the line 458 formed in the valve spool and by the line 440 to the main pressurized supply line 369 .



  Because the actuator 198 is then in communication with the discharge, the Belleville washers 202 force the shaft 196 inwards (FIG. 11), which closes the jaw 194 to firmly grip the tool. 35 (figure 12E). The actuation of the limit switch 343 has the effect of starting to rotate the support 40 counterclockwise, which releases said support from the tools. rotate to a horizontal rest position (Figures 12E and 12F). During the rotation of the support 40 in the reverse direction of clockwise, the solenoid 399 is kept energized to retain said support in a returned position during its rotation to the rest position.

  <Desc / Clms Page number 43>

 



   To rotate support 40 through 90, reverse clockwise to its rest position, solenoid 410 is de-energized, and solenoid 460 is simultaneously energized, which moves the valve spool. 411 to the left by compressing the spring 429. By moving to the left, the valve spool 411 communicates the line 418 for supplying pressurized fluid with the line 421, via a line 461 pierced in the valve spool, and it communicates the discharge line 423 with the line 420 by a line 462 pierced in the valve spool.

   The support 40 continues to rotate counterclockwise until the cam 296, carried by the disc 292, activates the limit switch 299, which conditions the electrical circuit. de-energizing the solenoid 460. It will be noted that the cam 295 as well as the cam 296 actuate the limit switch 299, to stop the rotation of the support 40 in the anti-clockwise direction. However, it should be noted that only one of the cams actuates switch 299 during a single tool exchange cycle and that the other cam, which is offset by 180, actuates the switch during of each alternating cycle.

   When the solenoid 460 is de-energized, the valve spool 411 is resiliently brought to its central position by the springs 413 and 429, which causes the motor 112 to communicate with the discharge line 423 via the lines 420 and 421, and pipes 430 and 431 threatened in the valve spool
411.



   After rotation of the support 40 over 90 in the anti-clockwise direction, to its rest position by actuating the limit switch 299, the magazine 32 is again indexed by rotation in the without. clockwise to remove tool 37 (figure 12F) from the do

  <Desc / Clms Page number 44>

 
To rotate support 40 through 90 counterclockwise to its rest position, solenoid 410 is de-energized, and adenoid 460 is simultaneously energized, which moves the spool. valve 411 to the left by compressing the spring 429.

   By moving to the left, the valve spool 411 communicates the pressurized fluid supply line 418 with the line 421, via a line 461 drilled in the valve spool, and it communicates the discharge pipe 423 with the pipe 420 by a pipe 462 pierced in the valve spool. The support 40 continues to rotate counterclockwise until the cam 296, carried by the disc 292, activates the limit switch 299, which conditions the electrical circuit. de-energizing the solenoid 460. It will be noted that the cam 295 as well as the cam 296 actuate the limit switch 299, to stop the rotation of the support 40 in the anti-clockwise direction.

   However, it should be noted that only one of the cams actuates switch 299 during a single tool exchange cycle and that the other cam, which is offset by 180, actuates the switch during of each alternating cycle. When the adenoid 460 is de-energized, the valve spool 411 is elastically brought to its central position by the springs 413 and 429, which makes the motor 112 communicate with the discharge pipe 423 via the pipes 420 and 421, and pipes 430 and 431 threatened in the valve spool
411.



   After rotation of the support 40 over 90 in the anti-clockwise direction, to its rest position by actuating the limit switch 299, the magazine 32 is again indexed by rotation in the end of the travel. clockwise to remove tool 37 (figure 12F) from the do

  <Desc / Clms Page number 45>

 
Once the support 40 has rotated to its rest position, the adenoid 399 is de-energized, which returns the valve spool 403 to its central position due to the action of the springs 405 and 454. In its central position. where these springs are brought, the pipes 127 and 352 communicate with the discharge pipe 372 by the pipes 476 and 477 formed in the valve spool 403.



   At this time, a tool change cycle is completed. As previously mentioned, adenoid 373 is energized during a machining cycle to push drum 32 counterclockwise, to keep finger 251 in contact with lever 262, which prevents crashes. disorderly movements of the drum and keeps the next index tool placed in the tool change station. Each time the machine tool is stopped by cutting off its electric current, the adenoid 373 is de-energized, and the valve spool 374 is brought to its central position by the springs 380 and 467.

   In this central position (see figure 11), the pipes 243 and 244 communicate with the discharge pipe 379 via the pipes 474 and 475 made in the valve spool 374 *
A variant of the present invention which has just been described is illustrated in FIGS. 13, 14 and 15.

   It particularly relates to a modified tool storage drum or magazine having approximately the same diameter as the drum 32 shown in flower 1, but having a capacity to accommodate a larger number of oven tools adapting a drum of the same diameter for support more posts, the tools at the tool porta are closer to each other in the periphery of the drum and are hinged to it instead of being supported in a cone of revolution as illustrated in the first embodiment.

   Thus, in this way, a larger number of tool holders is obtained without increasing the diameter of the

  <Desc / Clms Page number 46>

 storage drum. Whatever drum is used with the machine tool, the assembly and the drive onanism for each type of drum are identical. Likewise, the tool changing mechanism is used in an identical form whether it is used in a tool machine with the tool drum of the conical type or of the swivel type of tool storage. With interchangeable tarpaulins, machine tool fabrication for machining cycles requiring few tools, as well as machining cycles requiring many tools, is greatly simplified.



   In the description of this variant of the invention, elements common to the two embodiments of the invention bear the same references'! in the figures illustrating each embodiment. Further, since the same drive mechanism is used for each drum, the drive mechanism heretofore described for drum 32 and illustrated in Figure 4 allows indexing to be effected. of the modified drum.



   Reference will now be made to FIGS. 13 and 14 which show a modified tool magazine or drum 501 for storing tools, supported for rotation by the shaft 23J which is driven in rotation by the hydraulic motor 215. as shown in Figure 4. Shaft 230 rotates in recesses 233 and 234 and passes through the bore opening 239 of boss 238 so as to be flush with the top face of drum 501. Bolts 240 pass through the boss 238, to secure the drum 501 to the flange 237 of the shaft 230. The periphery of the drum 501 has several radial slots or guide grooves 502, radially spaced apart. Each slot or groove 502 has a predetermined width, and is provided with a pivoting rectangular cartridge or holder 503 for supporting a tool.



    In addition, not only the parallel sides of each fctc radiate 502 support the tool holder but also the juide for

  <Desc / Clms Page number 47>

 its pivoting. Since each rectangular tool holder and each cooperating groove are respectively identical to all other pivoting tool holders and to all other guide grooves threatened in the drum, it is considered sufficient to describe only in detail only one tool holder and one guide groove.



   Each tool support 503 comprises a rectangular block articulated in its corresponding slot 502 by a pin 505, the opposite ends of which are mounted in the drum 501 and pass through an opening bored in a shoulder 506 forming an integral part of the support 503. , as illustrated on flowers 14 and 15.

   To support a tool in the tool holder, the tool holder 503 has a reamed opening 507 whose axis is normally parallel to the axis of rotation of the drum and is perpendicular to the axis of rotation of the holder around. of axle 505, b To liberally hold a tool holder in tool holder 503, a retaining mechanism 508 is provided with each tool holder and includes a ball spring-loaded in the direction. radial inwardly to fit into a cooperating annular groove 512 machined into the tool holder, as shown in Figure 14.

   Since each tool holder 503 can rotate outwardly about its hinge axis 505, it is necessary that all the supports are kept vertical and parallel to the axis of rotation of the drum during its indexing movement. selective tools.



   For this purpose, the tool storage drum 501 with radial slots comprises a hollow central part in which a circular fixed guide path (or ring) is supported.
513 arranged concentrically. As will be explained, the tool guide path consists of a fixed path 513 which has a peripheral opening intended to receive a section of the radially movable guide path 523, as illustrated.

  <Desc / Clms Page number 48>

 in Figures 13, 14, 15 and 20. The fixed path 513 and the movable guide section 523 are all fixed to the central housing 216 by bolts 520, toothed. is shown in figure 14.

   During selective tool indexing performed by drum 501, the movable guideway section 523 is biased, as shown in figure 14, so that a curvilinear exterior surface does this. The section cooperates with the path 513 to constitute a continuous peripheral surface 514. This circular peripheral surface of the guide path and the aforementioned recalled section extend over 360 * and are concentric with the axis of rotation of the storage drum 501.

   To ensure a functional connection between the tool support $ 03 and the peripheral surface 514 formed by the cooperating guide paths 513 and 523, the tool support 503 comprises two guide rollers 517 and 518 fixed and rotating on a shoulder. 506 forming an integral part of the support 507 and arranged on either side of the pivot axis 505 around which the tool support pivots. The guide rollers 517 and 518 of each guard are: un- ted so as to rotate about a geometric axis parallel to the axis of rotation of the drum and perpendicular to the axis of the pivot 505 around which the support is pivoted. corresponding tool 503.



  During the indexing of the drum 501, the tool holder 503 is guided lonr. of the continuous peripheral surface 514 of the guide path by the rollers 517 and 518, as clearly shown in FIG. 14, keeping the longitudinal axis of the tool support 503 parallel to the axis of rotation of the drum. During the indexing of the drum, the rollers 517 and 518 of each tool support roll on the peripheral surface of the guide path.



  The tools are normally supported in this position, that is to say that the longitudinal axis of the tool support is parallel to the axis of rotation of the drum, a position which will be called for reasons of clarity in this description .position in-

  <Desc / Clms Page number 49>

   dexable "for the tools. Thus, if the drum is immobilized, that is to say even if it does not turn, the tools are held in the" indexable position "by the rollers 517 and 518 from the fact that they are in contact with the guide path 513.



   Not only does the movable radial guide section 523 of the guide path serve to guide the tool holders during the indexing of the drum, but it also serves to pivot a tool holder from the "indexable position" to. at a tool change station, referenced 525 as a whole and clearly illustrated on fibers 13 and 15. To achieve this result, the guide path section 523 is supported so that it can move radially outward and parallel above the one piece movable tool change support axis 40.



   At the tool change station 525 the longitudinal axis of the tool holder 503 lies in a plane parallel to the axis of the spindle 45 and is arranged in vertical alignment with the latter and with the axis of rotation of the holder 40. As a result, a tool holder 503 is indexed by rotation of the storage drum to an indexing position in substantially radial alignment with the radially movable guideway section 523.

   To move the tool holder 503 between the "indexable position" and the tool change position for subsequent removal of the tool from the tool holder, the tool holder pivots radially toward the tool holder. outside about its hinge axis 505. As seen in Fig. 13, the movable guide section 523 is disposed near the tool changing station so as to pivot a tool holder 503 to at the tool change position. Further, as shown in Fig. 13, the movable guide section 523 is moved to the left of a worm plane passing through spindle 45, shaft 44, and tool holder 503. .

   Guide section

  <Desc / Clms Page number 50>

 movable 523 is offset to the left of this vertical plane in order to ensure a chronodécienché cooperation of the pivoting tool support and of the indexing, in the clockwise direction, of the drum 501 and of the rotation in the direction counterclockwise which places the tool in the tool change station.



  To pivot the tool holder 503 to the tool changer position while maintaining the rollers 517 and 518 in contact with the movable guide section 523, said section is moved rectilinearly as well as curvilinear around it. the pivot axis 505 in a radially outward direction.



   When the movable guide section 523 has been recalled, as illustrated in FIG. 14, it can be seen that its outer face is perpendicular to a fictitious radial line intersecting the axis of rotation formed by the pivot axis 505 for the support of tool 503. Once the tool holder 503 has rotated outwardly about its axis, as shown in Figure 15, a fictitious radial line extending outwardly thereof is maintained. perpendicularly in an identical manner to the outer face of the entire movable guide section 523. Regardless of the direction of the pivoting of the tool support 503, around its axis 505, the guide rollers 517 and 518 which will be supported therein and rotate therein are maintained in continuous guide contact with the curvilinear outer face of the movable guide section 523.



   To achieve this result, the mohile guide section 523 is biased so as to pivot about its axis, and at the same time its axis is biased to move outward in a curvilinear path concentric with the pivot axis. - ment 505 of the tool support. The two distinct components of the displacement are calculated so as to move the guide section 523 integrally so that its curvilinear outer face continuously bears against the guide rollers 517 and 518 of the tool holder,

  <Desc / Clms Page number 51>

 
To achieve the displacement of a block of the guide section 523, a novel extendable linkage mechanism 62d has been designed comprising a plurality of spaced pivotally intersecting links which are arranged in identical symmetrically spaced pairs,

   like pairs of rods 530 and 531.



   At their front end, the links 530 and 531 are articulated by a pivot shaft 532 to the opposite exterior vertical faces of inwardly projecting flanges 533 and
534 forming an integral part of the movable guide section 523.



   It is seen that the shaft 532 constitutes the generally movable main pivot axis for the movable guide section 523 when the latter is moved in one direction or the other.



   Because the identical links of each pair of links operate in synchronism, only one link of a pair will be described below to facilitate the description.



   Towards its rear end, link 531 is articulated by bolts 539 and 540 to parallel and movable support links 541 and 542, with a view to extending movement.



   These support links are hinged by bolts 545 and
546 to an upwardly extending flange 547 which is an integral part of a linkage bracket 548. The latter is secured by bolts 549 to a downwardly extending base section 550 forming an integral part of the linkage bracket. the support base for the ring
513. To keep all the elements of the linkage mechanism 528 in synchronism, the identical rods of the rear pair
542 and 543 comprise a transverse bar 552, which is an integral part thereof and which in fact constitutes a single U-shaped part coming from a single block. Likewise, the rods 541 and 541 A are joined by a single block cross bar
553, constituting an organ of a U.



   At its upper end, the rod 541 is an integral part of a lateral arm which is articulated by a bolt 554 to

  <Desc / Clms Page number 52>

 one end of a tilt control link 555. Four control the pivoting or tilting action - the movable guide 523, the outer extract of the control link 555 is articulated to a shaft 556, which passes through Appropriate bored openings in the guide section flanges 533 and 534 which extend inward.

   In between, shaft 556 is hingedly disposed a tubular support sleeve 56C which is attached to the outer end of a pision rod 561 actuated by cylinder 502. The opposite extract of cylinder 562 is articulated by a bolt 563 to a vertical flange 565 which is an integral part of the linkage support 548.



   To actuate cylinder 562 to bring a tool into util holder 503 from its indexable position to the tool change position, pressurized fluid is sent to this cylinder through line 569, while a line 570, one end of which is connected to the opposite end of the actuating cylinder 562, communicates with the exhaust. Conversely, to return the tool holder 503 from the tool change position to the indoxa position, pressurized fluid is sent to cylinder 562 through line 570, while line 569 is simultaneously. communication with the exhaust.



   Not only the tool support 503 supports a tool in the indexable position as well as in the tool change position, but it also serves as a movable stop limiting the rotation of the drum counterclockwise and counterclockwise. performing the final positioning of the tool holder in the tool change station. For this purpose, when the tool holder
503 is in the tool change station, it is simultaneously in a meeting line with a positive stop
572 subject to the frame 28.

   Reverse drum rotation

  <Desc / Clms Page number 53>

 needles of a montro to carry out the final positioning of the tool support 503 in order to bring one of the sides of the latter against the fixed stop 572, as illustrated in the figure
13, which stops this rotation in the direction iuverse clockwise. However, it should be noted that the tool holder
503 ae found in a line of meeting with the fixed stop 572 only when it is in its tool change position on the outside. Therefore, when the tool support is in its recalled or indexable position, it will avoid the fixed stop 572, whatever the direction of rotation of the drum.

   It goes without saying that during the main indexing movement of the storage drum, the new chosen tool is moved beyond the positive stop 572 in the direction of clockwise; the support 50) then pivots outward, and the rotation of the drum changes direction to push in the counterclockwise direction the tool support having rotated, to make it bear against the positive stop 572.



   To better illustrate the operation and the novel features of the present invention, a typical index movement will be described with reference to Figures 13, 14 and 15. In this variant of the invention, as well as in the embodiment shown. in figures 1, 2 and 3, the drum is rotated in a counterclockwise direction, by report to finish * 13, to be indexed so as to start a machining cycle and to advance the following tools up to the tool changing station after the start of a machining cycle. In the same way in the two embodiments, the drum is driven over a limited distance in an anti-clockwise direction against,

   to perform the final positioning of the tool in the tool change station. In the variant involving the pivoting tool support, the drum 501 is indexed by rotation in the direction of clockwise for position. ner the first tool (or tool identified by a code) of a machining cycle in the vicinity of the tool change station 525. For this purpose, the longest tool identified by code extends towards the

  <Desc / Clms Page number 54>

 down a distance sufficient to actuate limit switch 286A, indicating the start of a machining cycle and conditioning the electrical circuit to then bring that tool into the tool changing station.

   However, before that, the drum
501 continues to rotate clockwise a further predetermined arc until guide roller 51b, which is associated with a different, angularly placed tool holder 503, actuates the Sequence control limit switch 271A, as shown in figure 14 Actuation of this switch reverses drum rotation (or turns counterclockwise) and simultaneously operates cylinder 562, which rotates the holder 503 carrying the first tool in the machining cycle to the tool loading station when the drum begins to rotate in a counterclockwise direction.

   In other words, actuation of the limit switch 271A rotates the drum counterclockwise and at the same time moves the movable guide section 523 which locates the tool holder 503 in the same time. the tool change station. As mentioned earlier, when the tool holder 503 is disposed in the tool changing station, the drum by turning counterclockwise will bring up one of the side faces 39 of the tool holder, having rotated outwardly against the fixed stop 572 and thereby effect the final positioning of the tool holder in the tool change station.

   When the tool holder 503 is in the tool changing station, the lower limit of the displacement of the tool holder 503 is first set by means of a stop screw 573 screwed into the lower section shaped. U of drum 501 below each guide groove 502, as shown in Figure 14.

   By rotating the stop screw 573, the horizontal position of the tool holder is adjusted for its pivoting, to align the axis of the bored opening of the tool holder parallel to the longitudinal axis of the spindle. 45 when the tool holder is in the tool change station,

  <Desc / Clms Page number 55>

 
A novel feature of the present invention, which particularly relates to self-reverse tapping tool holders, resides in a locking mechanism 580 illustrated in Figures 16 and 16A. It goes without saying that tool holders Self-reverse tapping are particularly advantageous with machine tools where the spindle can only turn in one direction.

   However, self-reversing tapping tool holders are not limited to non-reversible spindles, but can be used just as well with machine tools having reversible spindles, which means that they can be used just as well. avoids using a reverse rotation of the spindle at the tapping horns.



   With a self-reversing mechanism, a tap is extracted from a threaded bore without reversing the rotation of the spindle. An inherent requirement of the built-in reverse gear mechanism to reverse the tap rotation is the need to keep a section of the tapping tool holder stationary relative to the rotating spindle. The integrally held fixed reversing control section may have any configuration compatible with a locking device to immobilize it relative to the spindle. A representative auto-reverse tapping tool holder of this type of arrangement is a tool called a "Tapmatic" Model 500A, manufactured by the Tapmatic Corporation.



   The locking mechanism 580 illustrated in Figures 16 and 16A functions to hold a reversing control section 581 (flanged) of a tapping tool holder 52 in a block so as to prevent it from turning. relative to spindle 45. The spring loaded latch 580 is secured to the column 26 near the periphery of the pin 45 by two bolts 583 and 584 and includes a yoke 585 Therefore, the latch 580 is fixed relative to the rotating spindle 45 and to a flanged retainer plate 169A attached thereto by cap screws,

  <Desc / Clms Page number 56>

 retort via 169B. A finger 586 is articulated at one end of the yoke 585 by a pin 587.

   A second pin 589 is supported by the yoke 585 parallel to the pin 587 and passes through a larger diameter opening 590 threatened in the finger 588. Because the dimeter of the opening 590 is greater than the diameter of axis 589, the angle of pivoting of dolt 586 about axis 587 is limited.



   In its normal state, either without tools or with tools other than taps, carried by the spindle 45, the finger 586 is normally biased outwards by a ball and spring mechanism 591, carried by the cover collar. dust 594 from the spindle which is attached to column 26 by bolts 595.



     Retort shown in Figure 16A, the flanged section 581 of the self-reverse tap tool holder 582 which is carried in spindle 45 has slits 597 in its periphery. The flanged section of the tapping tool holder 5b1, which is the section fully held stationary, extends radially overhanging the latch mechanism 580 by a predetermined distance. Under these conditions, when the port tool 582 is inserted into the spindle 45, the flanged section 581 moves the tool 586 inwardly compressing the ball and spring mechanism 591.

   As the tool holder 582 begins to rotate at the start of a tapping operation, the flanged section 581 rotates until one of the slots 597 is radially aligned with the finger 585. When one of the slots 597 and the finger 586 are thus aligned, the finger is pushed outwards by the ball and spring mechanism 591 and engages in the aforementioned slot 597 to immobilize the flanged section relative to the pin. Once the flanged section 581 is immobilized by finger 586, tool holder 582 is taken for a tapping opera- tion and is automatically reversed to remove a tap from a tapped bore without reversing the direction of the thread. spindle rotation.

  <Desc / Clms Page number 57>

 



   In the process of inserting the tapping tool holder 582 into spindle 45, it is possible that one of the radial slots 597 is exactly radially aligned with the finger 586. In this case, the flanged section 581 air immediately. locked by the finger 586 which would prevent it from rotating because it would fit in the uno of the castings 597 when the tool is fixed in the jaw. It can be seen that with this immediate locking of the flange section, the tap is simultaneously in a state of operation without the flange having turned.



   When tools other than taps are supported in spindle 45, finger 586 of latch mechanism 580 is urged out by ball and spring mechanism 591, retort shown in the figure read. Although the. finger is pushed outwards, it does not control the operation of these other tools or the operation of the tool changer mechanism.



   FIG. 17 illustrates a part of the hydraulic circuit of FIG. 11 and shows a modification of the hydraulic circuit for operation, of the cylinder 52 serving to incline the movable guide section 523 as well as a tool holder 503 in contact with that here (see figures 13, 14 and 15). As described above with respect to cylinder 5862, it will be remembered that this rotates the tool holder 503 from the "indexable position" to the horizontal or tool change position and vice versa.



   The movement of the tool holder 503 between the in dexing position and the tool change position takes place in time that a rotation of the drum sounds counterclockwise. Similarly, the tool holder 503 changes from a tool change position to the "indexable position" upon a clockwise rotation of the drum.

   To act: er the cylinder 562. To move the tool holder from the indexing position to the tool change position simultaneously with the start of rotation of the drum 501 in the reverse direction.

  <Desc / Clms Page number 58>

 clockwise, the pressurized fluid supply line 569 is placed in communication with the line
244 and with one end of cylinder 582, the opposite end of cylinder 582 is connected to line 243 through fluid line 570.



   As shown in Figure 17, the actuating cylinder 502 is connected in parallel with the motor 215 which drives the drum 501 in rotation. Therefore, when the adenoid 373 is energized to send pressurized fluid to drive the motor 215 to initiate a counterclockwise drum rotation, the pressurized fluid is simultaneously sent. to the cylinder 582, which pushes its piston 610 outwards by rotating the aforementioned movable guide section as well as the tool holder
503 from the "indexable position" to the tool change position.

   Fluid under pressure flows from supply line 309 through line 376 and line 377 of valve spool 374. On leaving line 377 formed in said valve spool, the pressurized fluid reaches through line 569 to the acceleration cylinder.
562. At the same time, the rod end of piston 610 as well as the opposite side of motor 215 are brought into communication with the exhaust. On leaving cylinder 562, the fluid is drained through lines 570 and 243 and through line
378 formed in the valve spool 374 and it passes into the pipe 379 which communicates with the discharge pipe
372. The fluid leaving the motor 215 passes to the discharge line 372 through the lines 243, 378 and 379.



   To move the movable guide section 523 and the tool holder 503 from the tool change position to the index position at the same time as the start of rotation of the drum 501, the aolénolde 46b is energized to make pressurized fluid to engine 215 as well as actuating cylinder 562. Because solenoid 468 is energized, which displaces

  <Desc / Clms Page number 59>

 this the valve spool 374 to the right. The pressurized fluid departs from supply line 369 and passes through line 376 and line 468 into the valve spool.

   On leaving said pipe 468, the fluid under while passing in a short time through the pressure pipe passes through the pipe 243 and reaches the engine 215 570 up to the cylinder 562. Entering the latter, the pressurized fluid pushes the piston 610 inwardly, which rotates the movable guide section 523 as well as the tool holder 503 from the tool change position to the recalled "indexable" position. At the same time, the opposite side of piston 610 is placed in communication with the discharge via lines 569 and 244, line 469 of valve spool 374 and line 379 connected to line 372. Likewise, the fluid leaving the engine 215 is returned to the evacuation through the pipes 244, 479, 379 and 372.



   With the exception of the modification of the hydraulic circuit described above, know that the actuating cylinder of the hydraulic circuit-serving to actuate the 562 is connected in parallel with the motor 215, the rsste of the hydraulic circuit serving to actuate the variant of the present invention is identical to the remainder which is included in the embodiment shown in figure 11.



   The electrical circuit used to control the func-
 EMI59.1
 of the electrical circuit diagram shown schematically on the electrical circuit, we will assume certain initial conditions to better describe the various characteristics of this circuit.



   It is assumed that a new set of tools has been placed in the stockago drum for the next machining cycle, and that the first tool or tool identified by a code that is to be used is not in the change of tools.



   Further, it will be assumed that the spindle does not contain a tool and that the electric current to the machine tool is turned off. As a result, the jaw is in a blocked or gripping state, and the movable support 40 is recalled and is in its horizontal position 18. In the description of the operation

  <Desc / Clms Page number 60>

 tale of rest. To facilitate the description of the electrical circuit
 EMI60.1
 in figure 18, a column of ref rr: ncee followed by 1 letter X is port; 1 gaucho in this figure.



  Lo co-going with the electrilue action. ant the trichine -piro- tool comes from a three-phase sector represented by the conductors L1, L2 and L3 that can be put on a pure circuit aliuonter a motor 625 by the IR. via an AgnGral v2c switch, fuses 627 and the normal contact bars rua rit ojvor *: e3 û2: a relata b2d.

   The circuit of ca ando ij - t r.:i3 souo tonsion by a single-phase current coming from a holei a fo return 630 whose primary is connected to conductors L1 and L2 and whose second-read
 EMI60.2
 is connected to a power supply having a reduced voltage desired to energize conductors o2 and 53,; î To energize both the control circuit and the pump motor 625, press mome-itan4z ;, jnt on a switch 634, which stuffs a circuit from a conduc-
 EMI60.3
 their 645 and reaching the driver u32 r-ar via a normally closed pushbutton switch / '636 and passing through the motor relay coil 628 to energize
 EMI60.4
 aion the control driver 63.

   The latter is read again on the opposite side of transformer 630, component illustrated in figure 18.



  The energization of the relata 628 causes the three contact bars 628 to move upwards, which forces a circuit energizing the pump motor 625. Another contact bar 628A is simultaneously moved upwards. high by establishing between conductors 635 and 632 a guard circuit to maintain
 EMI60.5
 energized relay 620 and said control conductor. At the same time, with the energization of relay c28, another relay 640 placed on the right of line 41X is energized, which closes an excitation circuit of solenoid 373, to push drum 32 counterclockwise. of a watch by retaining one of the fingers 251 in contact with the pivoting stop lever 262, Figure 5.



  The relay 640 excitation circuit is established from the

  <Desc / Clms Page number 61>

 energized conductor 632 via a conductor 641 and a branch conductor 642 terminating in a brush
 EMI61.1
 643 of a row: -, of do pads 644 of a rotary switch bearing as a whole the reference 645. When the brushes of this switch bear respectively against a last pad of the respective rows of pads, circuits are closed therein , as illustrated in Figure 18. As is well known in the art,
 EMI61.2
 the sweepers ;; rect.ir aloctê5 to the switch 645 are simultaneously moved not Il & .3 on contacta arranged successively in each row, retort will be explained later.

   From brush 546 the circuit is closed by a vertical conductor 648, by the coil of relay 640 and a conductor 649 connected to the live conductor 633, The energization of relay 640 moves its associated contact bars o40A and 6408 upwards. .



  As it rises, the normally open contact bar 6-OA connects conductors 651 and 652, closing a circuit from conductor 632 to energize solenoid 373 whose opposite terminal is connected to live conductor u33. Under these conditions established when the control circuit is energized, the latter is put into a state or conditioned to execute a cycle.
 EMI61.3
 key of tool ch.:an.c;et::c:1t when it receives a soft indication from a manual switch.



  To carry out a tool change cycle, that is to say an exchange of oJti13 between the drum 32 and the spindle 45, one presses or.ent.J.! 1st on a tool-change o53 Tool, mounted in conductor 291, which energizes the coil of tool change relay 654 to establish certain predetermined conditions in the circuit. Lo excitation circuit
 EMI61.4
 of relay 654 starts from conductor 632 and passes through the momentarily depressed pushbutton 653, and it passes through the coil of relay 654 and a conductor 657, 1 is z * U4 has this effect * ar AU which is connected to the live conductor 633.

   Excitation of relay 654 moves its normally open contact bar 654A upwards to close a hold circuit from the conductor.

  <Desc / Clms Page number 62>

 632 and intended for the relay. Simultaneously, the associated contact bars 654B and 654C are also moved upward.



  Raising the contact bar 654B closes a circuit starting from conductor 632 and passing through conductor 658, closed contact bar 654B and conductor 659 to reach the coil of a relay 660 read back to conductor 633. The excitation of relay 660 moves its associated contact bar 660A upwards, closing a circuit used to energize solenoid 3b6 to apply spindle brake 187, figure 2. This circuit starts from conductor 632 and passes through conductors 663, 664 and 665, the contact bar 660A then closed and the solenoid 386 connected to the conductor b33.



   Closing the contact bar 654C establishes a circuit from conductor 632, and passing through limit switch 343 then closed and conductor 666 to energize? the coil of a relay 656. This circuit is closed by the contact bar 654C then closed, a conductor 670 and a conductor 671 connected to the conductor 657 which is connected to the conductor 633.



  Energizing relay 656 closes its normally open contact bar 656A conditioning an electrical circuit for later use.



   Another contact bar 6540 associated with relay 654 is moved upward by closing a circuit putting voltage on relay 672 of the rotary pad switch. This circuit is formed from the conductor 632 passing through the horizontal conductor 641, a vertical conductor 680, the brush 675 and a conductor 681 terminating in the contact bar 654D then formed.



  From said contact bar, the circuit passes through conductors 682,697 and 683, normally closed contact bar 672A, and arrives at relay 672 which is connected to conductor 657.



  Energizing the pad switch relay 672 simultaneously moves its associated contact bar 672A upward by cutting the circuit between conductor 683 and relay 672, which

  <Desc / Clms Page number 63>

 stops excitation of the relay. De-energizing the relay coil 672 of the pad switch causes the brushes 675, 643, 676 and 677 of the rotary switch to advance counterclockwise, with respect to figure 17. pads 645 up to the first pad of the respective rows of switch pads. This step-by-step movement is carried out in a known manner by the operation of a ratchet and ratchet wheel mechanism with spring return, as shown schematically in figure 18.



     Retort illustrated in this figure, the respective brushes of the rotary switch each bear against the last pad of the respective rows of associated pads when the cycle start pushbutton is momentarily pressed.



    From the last abovementioned pads, it goes without saying that the step-by-step movement of the brushes always takes place in the anti-clockwise direction to trigger the control indexing. next. Another normally closed contact bar 654E, associated with relay 654, is moved upward to an open position having no effect at that time on the electrical circuit.



   When the brushes 675, 643, 676 and 677 are fed to the first pad of each row of pads of the rotary switch 645, the circuits previously established by the brushes 675 and 643 are cut. Thus, the brush 675 cuts the circuit between the conductors 680 and 681, preventing an immediate re-energization and automatic operation of the relay 672 of the switch / 645 when closing its contact bar 672A. Likewise, brush 643 cuts the circuit between conductors 642 and 648 to de-energize relay 640. De-energizing relay 640 has the effect of bringing its associated contact bar 640A to its open position, which cuts the circuit. between conductors 651 and 652, and thereby de-energizes solenoid 373.

   By de-energizing solenoid 373, valve spool 374, figure 1, can return to its original state.

  <Desc / Clms Page number 64>

 central position by completing the positioning, in anticlockwise senna, of the drum 32 by means of the hydraulic motor 215. Simultaneously, the associated contact bar 6403 is returned to its normally formed position by conditioning an electrical circuit for a higher excitement.



   Once the brushes 675, 676 and 677 have simultaneously rotated to the first pad of their respective rows of plotaplate, various different circuits being conditioned and established. When the brush 643 is placed on the first pad, a circuit is A set that energizes a relay 608 which then closes a drive circuit for solenoid 466 to rotate drum 32 counterclockwise. at
The excitation circuit for relay 688 starts from conductor 632 and passes through conductors 641,642, then through brush 643 to a conductor 689.

   From conductor 689, the circuit continues through a normally closed contact bar 690C, which is associated with a latch relay 690, and through conductors 691. and 692 to relay 688 which is connected to conductor 633.



   The energization of the relay 6co moves up its contact bar, associated 688A, by closing a circuit starting from the conductors 663 and 654. and passing through the contact bar then formed 688A to the solenoid 466 which is connected to the conductor 633.



   It should be noted that the brushes 675, 643, 676 and 677 advance simultaneously. As a result, once broom 643 has been advanced to the first stud in its row, the remaining brooms will have. Likewise, they were advanced to the first stud of their reapec- ted rows of studs. Since each first pad on which the brushes 676 and 677 respectively bear are dead pads, there will be no effect on the circuit. However, when the brush 675 bears on its first corresponding pad, it conditions the circuit with a view to subsequent power-up.



   When solenoid 466 is energized, Figures 11 and 18, drum 32 is rotated clockwise until the first tool of the cycle

  <Desc / Clms Page number 65>

   machining, which is the tool having the longer tool holder body and identified by a code, operates the limit switch 286 identified by code, conditioning a citcuit to perform final positioning of the first tool in the tool changing station.



     L1 actuating limit switch 286 brings its associated contact bar to a closed position, which establishes a circuit along horizontal line 24X between conductor 632 and conductor 671 by energizing the coil of the interlock relay 690. The energization of the interlock relay- associated ce 690 has the effect of bringing its contact bar / 690B to a closed position, which establishes a circuit starting from the brush 675 and passing by a conductor 696, a conductor 697. and the conductor 683 and passing through the contact bar 672A then closed to energize the coil of the relay 672 of the rotary switch.

   As previously described, energizing relay 672 moves its associated contact bar 672A upward, breaking the circuit between conductor 663 and said relay. When de-energizing the coil of relay 672 of the rotary switch, brushes 675,643, 676 and
677 are simultaneously advanced in an anti-clockwise direction to come to bear against the second pad of their respective rows of pads. Simultaneously with the closing of contact bar 690B, contact bar 690C. which is associated with the latch relay 690, is brought to an open position in which it interrupts the circuit between the conductors 6b9 and 691.



   Due to the fact that the four brushes have been advanced to the second stud of the respective rows of studs, the brush 675 conditions a circuit for a subsequent energizing, while the brushes 676 and 677 bear on morta studs without effect - on the electrical circuit. The brush 643 forms a circuit starting from the conductor 642 and passing through a conductor 698, a normally closed contact bar 699C associated with the coil of a relay
699, and by driver 692 to keep relay 6d8 exci-

  <Desc / Clms Page number 66>

 tee in order to maintain a rotation of the drum 32 in a clockwise direction.

   The latter continues to rotate clockwise until the finger 251 associated with the tool identified by a code actuates the sequence control limit switch 271 to close it, which establishes, along line 7X, a circuit going from conductor 632 to conductor 671 and energizing a relay 702. The energization of this relay has the effect of bringing its associated contact bars 702A, 7029 and 702C in a closed position.

   By not closing, the bar 702A establishes along the horizontal line 8X a circuit starting from the conductor 632 and passing through a conductor 703, the contact bar then closed 690 associated with the energized coil of the locking relay 690 and by the then closed contact bar 702A of the energized relay 702, to energize the coil of the relay 699 which is connected to the conductor 671.



  * When closing, the contact bar 702 B closes along the horizontal lines 16X and 17X a circuit to energize a relay 707. This circuit starts from the conductor 632 and passes through a conductor 708 and it arrives through the busbar. normally closed contact 64-OB to vertical conductor 709. From conductor 709, the circuit continues through then closed contact bar 702B to energize relay coil 707, and from there it passes through conductor 710 to conductor 671 .



   On closing, the contact bar 702C closes a circuit starting from the brush 675 and reaches, through a conductor 711, the then closed contact bar 702C and a conductor 712 to the conductor 697. From the latter, the circuit closes via the conductor 683 and the then closed contact bar 672A, which excites rel '; 672 which is connected to conductor 657.



   Before the switch brushes change from the second to the third pad, energizing relay 699 brings its associated normally open contact bars 699A and 699B to a closed position and brings its normally closed contact bar 699C to a position opened. When closing, the control bar

  <Desc / Clms Page number 67>

 tact 699A connects conductors 715 and 716, which establishes a built-in guard circuit for relay 699. When closing, contact bar 699B closes a built-in parallel circuit going from conductor 711, and passing through upconductor 717 and a conductor 718 , to conductor 697. When opening, contact bar 699C cuts the circuit between conductors 698 and 692, which de-energizes relay 608 and then stops rotation of drum 32 clockwise. a watch.



   Energizing relay 707 causes its normally open contact bars 707A and 707B to be closed.



   In doing so, bar 707A establishes for relay 707 a guard circuit starting from vertical conductor 709 and passing through the closed contact bar / 707A to relay 707. When closing, contact bar 707B conditions the switch. electrical circuit along horizontal line 161 for ease of subsequent energization, given that energizing of this circuit is not possible at this time, because the lower contact bar of the switch limit switch 271 is actuated to an open position.



   Once the clockwise drum rotation has already been stopped due to de-energizing of relay 688, energizing rotary switch relay 672 moves its associated contact bar 672A upward. , which breaks the circuit between conductor 683 and relay 672.



   When the coil of relay 672 is momentarily energized and de-energized, the four brushes of rotary switch 645 are simultaneously advanced to bear against the third pad of their respective rows of pads.



   Once the brush 643 bears against the stud N 3 of its corresponding row, a circuit is established to excite - relay 640 in order to cause the rotation of the drum 32 in the anti-clockwise direction. This circuit starts from the brush 643 and passes through a conductor 722, the conductor 648, the coil of the relay 640 and the conductor 649 connected to the live conductor.

  <Desc / Clms Page number 68>

 
633. Activation of relay 640 brings its associated contact bar 640A to a closed position and contact bar G403 to an open position. When opening, the contact bar 640B cojpers the circuit subdivide it, of the 16X line, which de-energizes the relay. 707 placed in the horizontal line 17X.

   Relay de-energization
707 leaves its associated contact bars normally open
707A and 707B reach their open position *
When forming, the normally open contact bar
640A connects conductors 651 and 652, closing a circuit along horizontal line 201 to energize solenoid 373.



   The energization of this solenoid, figures @ 11 and 18, causes the rotation of the drum 32 in a counterclockwise direction, which moves the finger 251 (figure 5) and makes it abut against the lever.
262, which stops the rotation of the drum counterclockwise.



   When the brush 676 comes to bear against the third stud of its corresponding row of studs, a circuit is established which stimulates the relay 723, which pushes the movable support 40 (FIG. 2) inwards with respect to the frame 28. This circuits the part of conductor 632 and passes through conductor 641, / line
4bX, and a vertical conductor 724 to end at the broom 676.



   From the latter, the circuit continues through a conductor 725 t and a conductor 726 connected to the coil of relay 723. This circuit starts from relay 723 and passes through a normally closed contact bar 728A associated with a relay 728, and by a conductor 729 connected to the conductor 633. The energization of the relay 723 brings its associated normally open contact bar 723A to a formed position and causes its normally closed contact bars 7238 and 723C to an open position.



   On closing, contact bar 723A establishes a circuit from vertical conductor 664 along horizontal line 26X and through then-closed contact bar 723A to solenoid 399 connected to conductor 633. L ' excitement of. adenoid 399 (figures 11 and 12) determines the sending of pressurized fluid to push the piston 402, connected to the mobile support 40,

  <Desc / Clms Page number 69>

 inward before the latter turns to engage * a tool. Opening of contact bars 723B and 723C has no effect at this time on the control circuit.



   When the brush 677 comes to bear against the N 3 pad of its corresponding row of pads, a circuit is established which all energizes a relay 732. This circuit leaves from the conductor 632 and passes through the conductor 641, along the 48X horizontal line. and by a conductor 733 to reach the brush 677. From there, the circuit continues through a conductor 734 and ends at the coil of the relay 732 which is connected to the conductor 633.



  Excitation of relay 732 moves its associated 72 A contact bar toward the closed position by establishing a circuit from conductor 664 along horizontal line 241 to energize solenoid 410 connected to conductor 633. Activation of solenoid 410 (Figures 18 and 11) rotates movable support 40 clockwise to its vertical tool interlocking position.



   When the movable support 4u rotates from its horizontal position to a vertical position where it grasps a tool in the tool changing station, the discs 291 and 292 rotate with the shaft 44 and the sleeve 101, Figures 2 and 7. When the movable support 40 is in its vertical position, the limit switch 298 is actuated by one of the fingers 293 or 294. Because the tool engagement rotation has always - days instead of clockwise and the fact that the fingers of this 293 and 294 are offset by 180, it can be seen that these fingers operate to actuate the limit switch 298 respectively one cycle out of two of the tool changing cycles.

   Actuation of limit switch 298 results in moving its associated contact bar 29bU, line 12X, to an open position and moving its normally open contact bar 298L to a closed position. relay 738. In doing so, contact bar 298L establishes a. circuit
632 and passing through the contact brre then formed starting from the conductor / 296L and through a conductor 737, the line

  <Desc / Clms Page number 70>

 
 EMI70.1
 s rt 4'baitlfr $, a relay 738, From this relay, la, circuits a conductor 9 and the conductors 671 '# f' and 657 ending in conductor 633.
 EMI70.2
 the excitement of relay 738 brought these contact bars
 EMI70.3
 noraaleoent open * 738A, 738B and 738C at a fennec position.



  In 3 * closing, the contact bars 3 7381 and 7383 conditioning a part of the circuit in view of a subsequent energization tn fenaarit, the contact bar 738C establishes a circuit by-
 EMI70.4
 so much of the broom 675 which bears against a third stud, and passes
 EMI70.5
 by a conductor 74- If the contact bar then will make 738C,, aa conductor *, 697 at 683 to excite the râlais 672 du cots- fiaeu rfaxt'ryé plots set tied t-oi ion 49 relay has for, Green up its bar contact switch # 350ci4a 67 :, for -Qupos the circuit connecting the conductor 683 to the relay 672. tors, d the de-energization of the relay 672, the four brushes - the y1 'of the rotary switch 645 all respectively advanced Up to catrièaw plot 40 Iturs ran $ 4a # da respective plots% tç b4al 3 tt wear against auatrm <plot f .aalagis.

   IW circuit is mintÇU4 from 40 this year brush passing through the fourth pad and the conductors 722 and. 648, '"or a'rteair, xa3s. Z40. Zou $ oa ct cij ain guop'F: ¯ pmrmhtnir terminated oOjMus ieçBon and who) as explained 1U pcdetMp, close a circuit to push 1 <taal bor fu! vwraa, é *% aiguillât d / una pjontra, 'or fait -que -balai pcC'ta1', t, 3.1 Jdt v ¯i, a ua.rli 7¯ siioà la ci * - cuit resulting in râlais 752 t.t4riaur t established by the third plut ss çd.4, Dî and done, relay 719 is de-energized t, <t6) M #a associated contact bar 732A 4 jxJsùion ouTartt, and yes de xc> ç lor #% # aolaaaMa 10.

   From tatt @ i * 14 de-excitation of aol4notd <410, the mobile auppdrt 4 aat malntanu in a Vertical position in the case of a single tool, namely the tool located in the tool change station

  <Desc / Clms Page number 71>

 since it was assumed at the start of this cycle that the spindle initially did not carry a tool.



   When the brush 676 has been advanced to the fourth pad of its row of pads, the circuit leading to the relay 723 is cut, which de-energizes the latter and thereby brought its; associated contact bar 723 A in the open position, thus cutting off the circuit of the solenoid 399 and, consequently, stopping the flow of fluid which was pushing the piston 402 inwards, De-energizing the relay 723. has the effect of bringing its associated contact bar 723B to its closed position, which establishes a circuit along the ong of the horizontal line 3X to excise a relay 744 in order to loosen the jaw 194, to prepare for automatic release a fixable tool.

   This circuit starts from conductor 632 and passes through conductor 745, the contact bar then closed 738A and the contact bar then closed
723B and leads to relay 744 which is connected to conductor 633,
Energizing relay 744 brings its associated 744A contact bar to the closed position, which prepares a guard circuit for the relay along horizontal lines 1X and 2X.



   This guard circuit so closes, after moving the support 40 outwards, starting from the conductor 632 and passing through the contact bar 656B then closed and the contact bar Then formed 744A and ends at the relay 744. In the circuit of the solenoid, an associated contact bar 744B is brought to its closed position by, establishing a circuit from conductor 664 and passing through contact bar 744B to the solenoid of 436 which is connected to conductor 633. L energizing solenoid 436 (Figure 11) moves valve spool 437 to the left, which then sends pressurized fluid to actuator 198 to release jaw 194.

   As mentioned before, the jaw must pull actuated to release the tool before it can be extracted from it thanks to the axial displacement.

  <Desc / Clms Page number 72>

 from the support 40 to the outside. Since the initial conditions assumed that the spindle did not contain a tool, the release of the jaw becomes important when changing tools later, whether or not the spindle contains a tool. after the electric circuit of figure 18 that the more is released at the same time as the movement of the tool holder 40 green the outside More,

     the contact bar 73C is brought to its position by preparing a circuit to then energize the relay 728.

  <Desc / Clms Page number 73>

 



   When the brush 676 comes to bear on the fourth pad, it establishes a circuit starting from this brush and passing through a conductor 743, the contact bar then closed 723C and reaching the coil of the relay 728 connected to the conductor 633. The excitation of relay 728 brings its associated contact bar 728A to its open position, which cuts the circuit between relay 723 and the
 EMI73.1
 conductor 729 to plug the excitation of relay 723, Simultaneously, an associated contact bar 7268 is brought to its position
 EMI73.2
 closed, which establishes a circuit from conductor 664 along horizontal line 251 to energize solenoid 453.

   Turning on solenoid 453 (Figure 11) moves valve spool 403 to the right to send pressurized fluid to control cylinder 122, which pushes piston 402 and bracket 40 outward to extract. tool holder tool 33.



   When the support 40 as well as the shaft 44 are displaced axially outward during the pull-out stroke, the finger 341 moves away from its contact with the control switch.
 EMI73.3
 limit switch 343, which opened the latter.

   In rirtltsapx 1 its normally open position, switch 343 breaks the circuit - along the horizontal 4x line, this de-energizes relay 656, so the associated contact bar 656A of this relay is brought to its proper position. open position, which closes the delay circuit. used to keep the coil of relay 744 energized, until the exchange tools have been reintroduced into their respective recesses.



   As soon as support 40 reaches its price limit * axia-
 EMI73.4
 the outwardly, the finger 345 is moved axially outwardly with the shaft 44 to close the limit switch 346, in the horizontal line 131, which exits a relay
 EMI73.5
 750. when the di short end switch 346 is aman <t its Politian closes, it forms a circuit starting from the conductor 638. and passing through the coit4and alon Nra4 # da 1) '. v1 ',' - ' <- '' 346 tt us Driver 746 and parvit4i 1; la barra di '9A.ct Uori 4, 1 .... ",,"' "- I - .., t +), - '." '¯) I: -:. v W.: b '..':. T .-. 5. .7s: .C ^. 1v i'J

  <Desc / Clms Page number 74>

 closed 738B. From there, the circuit continues through the coil of relay 750 connected to conductor 671, and through conductor 657 connected to conductor 633.



   The energization of relay 750 brings its associated contact bars 750 A, 750B and 750C to their closed position. Closing the 750A contact bar has no effect on the circuit at this time, since the 298U contact bar is open. The closing of the associated contact bar 750 B establishes a guard circuit for the relay 750 starting from the conductor 748 and passing through the then closed contact bar 7508 to reach the coil of the relay 750.

   When closing, the associated 750C contact bar closes a circuit starting from the 675 brush and passing through
 EMI74.1
 la-bfnfe-d closed aloro contact 750B po-u'-parvenip to the coil of the - relay -'F54, - Bft-fle-ferrgant -; - lanrre-c.-totact-aasoc-tée-fi'3Ct ge-rme - ūQ-eireuit-parta - du - ba # - 6-e-passa-gar ur. conductor 751 and the then closed contact bar 750C and conductors 697 and 683 to energize the relay 672 of the rotary switch.



  When this circuit is closed, as explained previously, the four brushes of the rotary switch 645 are advanced to the fifth pad of their respective rows of pads.



   When the brush 643 bears on the fifth pad of its row of pads, the circuit energizing the relay 640 is maintained by the conductors 722, 648 and 649 in order to keep the drum biased in a counterclockwise direction. When the brush 676 bears on the fifth pad of its row of pads, 1 maintains the circuit established by the conductor 743 and the normally closed contact bar 723C to keep the relay 728 energized, which keeps the movable support 40 pushed axially towards the 'outside. When the brush 677 bears against the fifth pad of its row of pads, a circuit is established passing through this ba- lai, a conductor 753 and the conductor 734 to energize the relay 732 which is connected by its end opposite to the conductor 633 .

   Energizing relay 732, as previously described, brings its associated contact bar 732A to its closed position, which

  <Desc / Clms Page number 75>

 Make a circuit along horizontal line 241 to excite adenoid 410 to rotate 1800 bracket 40 clockwise, relative to Figure 1.



   When the support 40 begins to rotate clockwise to move the tool from the drum to the spindle, the finger 293 or 294, actuating the limit switch 298, stops moving. bear against it, as seen in ea examining Figure 7. When the limit switch 298 opens, its associated contact bar 298L (horizontal line 211) is brought to its normally open position, which interrupts the circuit between conductor 632 and conductor 737 to de-energize relay 738. De-energizing the latter has the effect of bringing its associated contact bars 738A, 738B and 738C to their open position.

   When opening, contact bars 738A and
738B cut live circuits which are in parallel with other guard circuits, and therefore have no immediate effect on the electrical circuit. On opening, contact bar 738C cuts a non-energized circuit between conductor 740 and conductor 697 and which, likewise, has no immediate effect on the electrical circuit.



   Simultaneously with the opening of the contact bar
298L of limit switch 298, its associated contact bar 298U (horizontal line 12X) is returned to its normally closed position establishing a circuit starting from conductor 632 and passing through the contact bar then formed and a conductor
754, the closed contact bar 750A of the coil of a relay 755 which is connected to the live conductor 671. The energization of the relay 755 closes its two associated contact bars 755A and 755B.



   On closing, contact bar 755A establishes a guard circuit for relay 755 from conductor 632 and passing through conductor 756, horizontal line 11X, and conductor 757 to conductor 754. The guard circuit continues. up to relay 755 and up to conductor 671. When closing, the bar

  <Desc / Clms Page number 76>

 Contact re 7558 conditions an electrical circuit for the subsequent energization of a relay 759 through conductors 760 and 761 and the horizontal line 21X.



   At the end of the rotation of the support 40 on 1800 in the sound system of clockwise to place the respective tool or tools in alignment with the spindle and the drum, is the limit switch 298 / aet. again by one or the other of the fingers 293 and 294. During this new actuation, the switch 298 brings its contact bar 29oU to its open position, which cuts the circuit in the horizontal line 12X 3an3 no immediate effect, because relay 755 is held in an energized state by the guard circuit starting in horizontal line 11X. Simultaneously, the associated contact bar 298L (horizontal line 211) is brought to a closed position by closing a circuit to re-energize relay 738 and relay 759.

   The relay 738 excitation circuit starts from conductor 632 and passes through the then tarnished contact bar 298L. horizontal line 211 and conductor 737 and reaches the coil of relay 738. From there the circuit continues through the conductor
739 and conductors 671 and 657 to conductor 733. Energizing relay 738 brings its associated contact bars 738A, 738B and 738C to the closed position. When closing, contact bar 738A closes a circuit in parallel with the guard circuit in horizontal line 1X and has no immediate effect on the circuit. Likewise, when closing, the contact bar 738B closes a circuit in parallel with the guard circuit passing through the contact bar then closed 750B (horizontal line 151) and has no immediate effect on the electrical circuit. .

   On closing, contact bar 738C conditions a non-energized circuit (horizontal line 371) for subsequent energization.



   Relay 759 is energized by an electrical circuit from conductor 737 through conductors 760 and 761 and

  <Desc / Clms Page number 77>

 contact bar then closed 755B to end at conductor 671.



  Excitation of relay 759 brings its associated contact bar 759A (horizontal line 35X) to its closed position, which establishes a circuit from brush 675 and passing through conductor 762, ur. conductor 783 and back conductors 697 and 683 to energize the relay 672 of the rotary switch. When de-energizing said relay, due to the opening of its associated contact bar 672A, the four brushes of the rotary switch 645 are advanced to the sixth pad of their respective rows of pads.



   When the brush 643 has come to bear against the sixth pad of its row, a circuit is maintained to energize the relay 640 by the conductors 722, 648 and the conductor 649 connects to the conductor 633. The supply of the brush 677 on the sixth pad of aa row of pads has no effect in the circuit because the sixth pad is a dead pad.



   During the advance of the brush 676 from the fifth to the sixth pad of its row of pads, the excitation circuit of the relay 728 is cut, and the de-energization of the latter causes the de-energization of the adenoid 453. The de-energization of the adenoid 453 stops the sending of the pressurized fluid (FIG. 11) to the actuator 122 to push the support 40 axially outwards. In addition, the contact bar 728A associated with the relay 728 is brought to its normally closed position by conditioning a circuit for subsequent energization of relay 723.



   Coming to bear on the sixth pad of its row of pads, the brush 676 establishes a circuit starting from the latter and ending at the conductor 726 to energize the relay 723. From the coil of the relay 723, the circuit passes through the then closed contact bar 728A and by the conductor 729 connected to the conductor 733. The energization of the relay 723 brings its associated contact bar 723A to its closed position, establishing a circuit starting from the conductor 664, along horizontal line 261 and passing through the then closed contact bar 723A to energize the solenoid 399 whose opposite side is connected to the conductor 633.

   The

  <Desc / Clms Page number 78>

 energizing solenoid 399 (Figs. 11 and 18) moves valve spool 403 to the left, which sends the pressure flange to actuator 122 to move movable support 40 to the left. As described above, by moving axially the support 40 simultaneously inserts the exchanged tools into the spindle and the tool support, respectively. However, since it was initially assumed that the spindle was not carrying a tool at the start of this cycle, moving axially inward at this time the support 40 performs the introduction of a tool. in the spindle 45. As a result, no tool is introduced into the piece holder 33 of the drum 32.

   Another contact bar 723B is brought to its open position upon energization of relay 723, which breaks the circuit, along horizontal line 3X, of the coil of relay 744. Opening of the bar Switch 723B has no effect on relay 744 because it is kept energized by the guard circuit starting in the horizontal line 1X. It can be seen that because the limit switch 343 is turned off at this time, its contact bar is in an open position and the relay 657 is not receiving power.



   When the carrier 40 is moved axially inward, the finger 345 disengages from the end-of-course switch 346, which opens the latter and brings its contact bar (horizontal line 13X) to an open position. Opening the limit switch 346 breaks the circuit between conductors 632 and 748, which stops sending current to relay 750. Therefore, its associated contact bars 750A, 750B and 750C are brought to their normally open position. Bringing the contact bar 750A to its open position breaks the circuit energizing the relay 755. De-energizing the latter brings its associated contact bars 755A and 755B to their normally open position.

   Since bar 755B is in its open position, the circuit between conductors 761 and 671 (horizon line - '

  <Desc / Clms Page number 79>

 tale 221) is cut to de-energize relay 759. Due to the de-energization of relay 759, its associated contact bar 759A is brought to its normally open position, which breaks the circuit between conductors 762 and 763. Opening of bar 759A has no immediate effect on the circuit, as conductors 762 and 763 are not live at this time.



   Bringing the contact bar 7508 to its open position and bringing the contact bar 750C to its open position has no immediate effect on their respective parts of the control circuit, given that each contact bar breaks a circuit that is not energized at this time.



   When the support 40 and the shaft 44 complete their axial inward movement, the finger 341 actuates the limit switch 343, as clearly illustrated in FIG. 2. The actuation of this switch ( horizontal line 4X) brings its contact bar to a closed position, which establishes a circuit starting from conductor 632 and passing through contact bar and conductor 666 to energize relay 656. The circuit closes via busbar. then closed contact 654 C and the conductor 670 connected to the conductor 671. The energization of the relay 656 brings its contact bar 656B to its open position, which cuts the guard circuit along the horizontal line 2X, and of this fact de-energizes relay 744 in line 3X. The de-energization of relay 744 brings its two associated contact bars 744A and 744B to their open position.

   Bringing contact bar 744A to its open position cuts the guard circuit which is not energized at this time in horizontal line 1X, while movement of contact bar 744B cuts the circuit going from the conductor. 644 to 436 solenoid (horizontal line 22X), which turns off solenoid energization De-energizing 436 solenoid relieves hydraulic pressure from actuator 198, leaving spring 202 (figure 2) to hamper the grip

  <Desc / Clms Page number 80>

 194 inwards, firmly squeezing the new tool inserted therein.



   Simultaneously with the opening of the contact bar 656B of the energized relay 656, the associated contact bar 656A this brought to its closed position by closing a circuit starting from the brush 675 and passing through a conductor 765, the contact bar. Contact 657A then formed and conductor 766 to reach conductor 697. From 1a, the circuit continues through conductor 6b3 and normally closed contact bar 672A to rotary switch relay 672, which energizes this relay.



   The energization of relay 672 brings the contact bar 672A up, which cuts the energization to relay 672. As a result of this de-energization, the four brushes of rotary switch 645 are advanced to the seventh pin of their respective rows. - tives of plots.



   When the brush 643 comes to bear on the seventh pad of its row of pads, it establishes a circuit through the conductors 722 and 648 to keep the relay 640 energized, which keeps the drum 32 biased counterclockwise. be. The circuit is established from the relay 640 by the conductor 649 ending at the conductor 633. When the brush 676 comes to bear against the seventh pad of its row of pads, it, 'establishes; a circuit starting from this brush and passing through the conductor 762 to keep the relay 723 energized. As previously described, the circuit is closed from relay 723 passing through contact bar 728A then closed and conductor 729 connected to conductor 633.

   The energization of the relay 723 keeps the adenoid 399 energized to positively push the holder 40 inward in a counterclockwise direction to its resting position.



   When the brush 677 comes to bear against the seventh pad of its row of pads, a circuit is established starting from this pool and passing through a conductor 768 to energize a relay 769.

  <Desc / Clms Page number 81>

 



  The coil of this relay connects to the opposite terminal of conductor 633. Excitation of relay 769 brings its associated contact bar 769A to its closed position, establishing a circuit from conductor 6b4 along horizontal line 271 to energize the relay. adenoid 460 which is connected to the conductor 633, The energization of the solenoid 460 moves the valve spool 411 to the left (figure 11), which sends pressurized fluid to the motor 112 and thereby rotates the support 40 on 90 counterclockwise to a rest position,
When the carrier 40, shaft 44, and cam discs 291 and 292 shown in Figure 2 rotate 90 counterclockwise, limit switch 298 is released.

   This results in a displacement of its associated contact bar 298L (horizontal line 211) to its open position, which interrupts the circuit from conductor 632 to conductor 737 and consequently de-energizes relay 738. As a result, the associated contact bars 738A, 738B and 738C of relay 738 are brought to their normally open position. In each caa, the opening of said contact bars has no immediate effect at this time other than to cut the circuits which have been conditioned.



   Simultaneously with opening of the contact bar 298L, the associated contact bar 298U, horizontal line 12X, is brought to its closed position, conditioning a circuit from conductor 632 to conductor 754. Because relay 750n 'is not energized at this moment, closing the 296U contact bar has no other effect on the circuit.



   When the support 40 completes its rotation in the anti-clockwise direction to the horizontal rest position, retort illustrated in broken lines in FIG. 1, the limit switch 299 (horizontal line 321) is brought to a position formed by one of the fingers 295 or 296, as clearly illustrated in FIG. 7. When the brush 675 has come to bear against the seventh stud, the actuation of the end switch.

  <Desc / Clms Page number 82>

 race 299 closes a circuit by the conductor 771 to energize a relay 772. A circuit closes by the contact bar then formed by the limit switch 299 and a conductor 773 connected to the conductor 633.

   The energization of relay 772 brings its associated contact bar 772A to its open position, which interrupts the circuit between relay 654 and conductor 657 and, consequently, stops the energization of relay 654. Therefore, this relay brings its associated contact bars 654A, 654B, 654C and 654D to their open position. Simultaneously, the associated contact bar 654E is brought to its normally closed position.



   Bringing contact bar 654A to its open position knocks the then non-energized hold circuit of relay coil 654 (horizontal line 26X). Bringing the associated contact bar 654B to its open position breaks the circuit between the conductors 658 and 659 which de-energizes the relay 660. As a result, the associated contact bar 660A of the relay 660 is brought to a position. open, which breaks the circuit from the 665 melter to the 386 solenoid. Due to the de-energization of this adenoid, the spindle brake 187 is released, as shown in figure 2, which allows the spindle to be driven in rotation.



   Bringing contact bar 654C to its open position breaks the circuit between relay 656 and conductor 670 by de-energizing this relay. As a result, the associated contact bar 66A of relay 656 is brought to its open position and has no immediate effect on the circuit, since it cuts off a non-energized circuit. Bringing contact bar 654D to its normally open position breaks the previously conditioned circuit of horizontal line 30X between conductors 681 and 682.



  Again, because this circuit is not energized, opening contact bar 654D has no immediate effect on the rest of the control circuit.



   Bringing the contact bar 654E to its normally formed position establishes a circuit from conductor 771 and past.

  <Desc / Clms Page number 83>

   aant by a conductor 776, the then closed contact bar 654E and a conductor 777 connected to the conductor 697. From there, the circuit continues through the conductor 683 and the then closed contact bar 672A to the relay 672, which energizes this relay. Here again, as described above, the relay 672 advances the brushes of the rotary switch 645 due to the de-energization of the relay which is caused by the upward movement of the contact bar 672A.



   Due to the de-energization of relay 672, the four brushes of rotary switch 645 advance and come to bear on the eighth pad of their respective rows of pads of the rotary switch. The reach of the brush 676 on the eighth pad of its row has no effect on the circuit because it is a dead pad. Likewise, the range of the brush 677 on its corresponding eighth pad has no effect on the circuit because it is a dead pad.



   As a result of the advance of the brush 643 between the seventh and the eighth pad, the excitation circuit of the relay 640 is cut, which de-energizes the latter. As a result, relay 640 drives its associated contact bar 640A to its open position, which breaks the circuit between conductors 651 and 652 (horizontal line 201) and de-energizes solenoid 373. As a result, the valve spool 374 is brought to its central position, FIG. 11, which stops the stress exerted on the drum 32 in a counterclockwise direction. Simultaneously, the associated contact bar 640B is brought to its closed position, which conditions the circuit of the horizontal line 16X.



   By bearing on the eighth pad of its row of pads, the brush 643 establishes a circuit starting from this brush and passing through a conductor 780 and the conductors 691 and 692 terminating at the relay 688, to excite it. This circuit is closed from the relay
688 by a conductor of the horizontal line 36X which is connected to the conductor 633. The energization of the relay 688 brings its control bar

  <Desc / Clms Page number 84>

 associated tact 688A with aa closed position, which establishes a circuit starting from the conductor 663 and passing through the contact bar then formed 688A to reach the adenoid 466 by exciting it.



   Excitation of adenoid 466 moves valve spool 374 (Figure 11) to the right, which sends pressurized fluid to motor 215 to successively rotate drum 32 clockwise, to place the new tool, arranged in sequence, in the tool change station 38 * as the drum rotates clockwise to place the new tool in the tool change station. tools, the finger 251 actuates the limit switch 271, Figures 3 and 5. In the electrical circuit of Figure 18, the actuation of this switch 271 brings its contact bar 27 IL to its open position without this has an immediate effect on this circuit.

   Simultaneously, the associated contact bar 271U is brought to its closed position, which establishes a circuit along the horizontal line 71 which energizes the relay 702. The energization of this relay causes its contact bars to be as- companies 702A, 702B and 702C to their closed position. The closing of the bar 702C has no immediate effect on the circuit because it shunts at this time the conductors 711 and 712 which are not under tension. On closing, contact bar 702A establishes a circuit from conductor 632 along horizontal line 8X through conductor 703 and then closed contact bar 690A to energize relay 699.

   The energization of this relay brings its contact bars 699A and 699B to their formed position, and the contact bar 699C to its open position. On closing, contact bar 699A establishes a guard circuit for relay 699 to keep it energized. When the contact bar 699B closes and when the contact bar E99C opens, they have no effect on the control circuit, since each of them is respectively in a circuit which

  <Desc / Clms Page number 85>

 is no longer powered on.



     On closing, the contact bar 702B establishes along the horizontal line 171 a circuit starting from the conductor 709 and energizing the relay 707 connected to the conductor 671 by the conductor 710. The energizing of the relay 707 causes its contact bars. 707A and 707B in their closed position. Because the bar 707A has come into the closed position, a guard circuit is established starting from the conductor 632 and passing through the conductor 708, the
 EMI85.1
 the c "r.d'.t <. "ur 7C and 1 (1t. contact then iL'I '^. ^. contact bar then closed6ef707A until the coil of the relay contact bar then closed / 7Q7A up to the coil of relay 707. On closing, contact bar 707B conditions a circuit along horizontal line 161 for subsequent energization of a relay 780.



   During the continued rotation of the drum 32, the finger 251 stops bearing against the limit switch 271, which opens the latter. Consequently, the associated contact bar 271U of this switch is brought to its open position, which cuts off the excitation of relay 702. De-energization of relay 702 brings its contact bars 702A, 702B and 702C to their normally open position. .



  In this open position of the contact bars 702A and 7028, they respectively cut circuits in parallel which had been respectively established to energize the relays 699 and 707.



  However, in each case, the parallel circuit suddenly has no effect on the continued excitation. respective relays 699 and 707, which are kept energized in a formed position. When the contact bar 702C is brought to its open position, it
 EMI85.2
 also has no immediate effect on the comoard circuit. 41ectrical.



   On closing, the associated contact bar 271L of the limit switch 271 establishes a circuit along the horizontal line 161 which energizes the rolais 780. The circuit is closed from the conductor 632. passing through the conductor 708, the then closed contact bar 640B and the

  <Desc / Clms Page number 86>

 contact then closed 271L and resulting in the contact bar then closed 707B.



  From there, the circuit continues through relay 780 and a conductor 781 to conductor 671. The energization of relay 780 brings its two associated contact bars 780A and 780B to their closed position. On closing, contact bar 780A establishes a guard circuit for relay 780, keeping it energized upon subsequent opening of contact bar 271L. On closing, contact bar 780B establishes along horizontal line 6X a circuit for energizing relay 784. This circuit starts at conductor 632 and then passes along horizontal line 71 through the then closed contact bar. 271U. From there the circuit continues passing through a conductor 785, the then closed contact bar 780B and the coil of relay 784 which is connected to conductor 671.

   The energization of relay 784 brings its associated contact bar 784A (horizontal line 311) to its closed position where it bypasses conductors 786 and 787 by closing a circuit starting from brush 675 and passing through conductor 683 and read then closed contact bar 672A to energize relay 672. When this rotary switch relay 672 is energized, its associated contact bar 672A is moved upward by cutting the energizing circuit of relay 672.



   Upon de-energization of relay 672, the four brushes of rotary switch 645 move from the eighth to the ninth pad of their respective rows of pads. The range of the brushes 676 and 677 on their corresponding ninth pad has no effect on the electrical control circuit, because their respective pads are dead pads. Because the brush 675 bears against the ninth pad, a circuit is conditioned for subsequent excitation.



   When the brush 643 passes from the eighth to the ninth pad, the circuit between the brush and the conductor 780 is cut, which de-energizes the relay 688 from the horizontal line 36X. De-energizing relay 688 brings its associated contact bar

  <Desc / Clms Page number 87>

 ciée 688A in its open position, which de-energizes the adenoid 466 and, thereby, stops the rotation of the drum 32 in the direction of clockwise. When the brush 643 comes to bear against the ninth stud, it settles a circuit starting from this brush and passing through the conductor 648 to energize the relay 640 from which the circuit continues through the conductor 649 to the conductor 633.



  Due to the energization of relay 640, its associated contact bar 640A is brought to its closed position and its associated contact bar 640B is brought to its open position.



  Bringing contact bar 640B to its open position breaks the circuit along horizontal line 16X, which turns off the energization of relays 707 and 780. As a result of de-energizing relay 780, its associated contact bar. 780D is brought to an open position effecting the de-energization of relay 784.



   Upon reaching its closed position, contact bar 640A bypasses conductors 651 and 652 by establishing along horizontal line 20X a circuit to energize solenoid 373. This excitation moves valve spool 374 (figure 11). ) counterclockwise and causes the drum to rotate counterclockwise which results in positioning contact against lever 262 with the same finger 251 which operated the sequence control switch. When the drum 32 rotates counterclockwise, the finger 251 stops bearing against the limit switch 271 and moves away from it.

   The opening of this switch brings its contact bar 271U into its open position by cutting the circuit along the horizontal line 71 and de-energizing the relay 702, which brings its associated contact bars 702A, 702B and 702C in their open position. Simultaneously, the contact bar 271L (horizontal line 16X) is brought to its closed position, but it has no effect on the circuit at this time, since the contact bar 640B is in its open position. When finger 251 meets lever 262, the second

  <Desc / Clms Page number 88>

 tool of the tool change cycle is then placed in the tool change station 38 and ready to be extracted at the start of a next tool change cycle.



   At this time, the tool change cycle for removing the first tool of the machining cycle from the drum and placing it in spindle 45 is completed, and the second tool of the machining cycle is placed in the drum. tool change station 38, As explained previously, the first tool change of a new machining cycle is triggered by pressing the pushbutton 653 to start the tool change cycle . The first tool change cycle includes the following main functions (1) rotation of the drum to place the first tool (identified by code) in the tool change station, (2) transfer of the tool identified by code into the empty spindle and (3) successive indexing of the drum to advance the second tool into the change station, ready for the next tool change.

   The second and all subsequent tool changes of a particular machine tool program are similarly triggered when pushbutton switch 653 is pressed. The second and subsequent tool changes of the same machine - my program only includes, however, two main functions: (1) exchange of the tool in the spindle with the tool in the change station and (2) sequential indexing of the drum to position the next tool in the tool changing station.



   To perform a tool change cycle placing the second tool in the machining cycle in the spindle 45 and at the same time transferring the first tool (tool identified by code) to the tool holder 33 in the drum 32 tool storage switch 653 (horizontal line 29 X) is pressed, which establishes a circuit from conductor 632 to energize relay 654. From conductor - 632, the circuit continues through the then closed contact bar of switch 653, the coil of relay 654 and conductor 657

  <Desc / Clms Page number 89>

 to conductor 633. Due to the energization of relay 654, its associated contact bars 654A, 654B, 654C and 654D are amended to their closed position, and contact bar 654E is brought to its open position.

   Due to the closing of the contact bar 654A, a guard circuit is established from the conductor 632 on the Ions of the horizontal line 26X to keep the relay 654 energized when the button switch is released. - push-button 653. When closing, the contact bar 6548 shortens * - bakes the conductors 658 and 659, in the horizontal line 5X, by closing an excitation circuit of the relay 660 which then moves its associated contact bar 660A to its closed position, which establishes a circuit to energize the solenoid 386. The energization of this adenoid has the effect of applying the spindle brake 167 (figure 2).

   On closing, the contact bar 654C establishes a circuit of the ions of the horizontal line 41, starting from the conductor 632 and passing through the contact bar then formed of the switch 343 and through the conductors 666 and 680 for energize relay 656. Due to this energization of this relay, the latter brings its associated contact bar to its closed position, but there is no immediate effect on the electric control circuit, because that leads 765 and 766 are not live at this time.



   When closing the contact bar 654D, a circuit is closed starting from the brush 675 and ending in the conductor 681, the conductors 682 and 683 and the then closed contact bar 672A to energize the relay 672. As described previously, energizing relay 672 moves its contact bar 672A upwards, which cuts off the circuit and thereby de-energizes relay 672. Due to de-energizing of relay 672, the four brushes 675, 643, 676 and 677 of rotary switch 645 are advanced counterclockwise, relative to Figure 17, and each brush contacts the first pad

  <Desc / Clms Page number 90>

 of its corresponding row of studs.



   Because the first pads of the respective row of pads on which the brushes 676 and 677 bear are dead pads, the contact of the brushes with pads will have no effect on the control circuit. Likewise, the coming into contact of the brush 643 with the first stud of its row of studs will have no effect on the circuit because the contact bar 690C is in its open position in which it cuts the circuit. fired between conductors 669 and 690.



   At this time, it should be noted that although the contact bar of the limit switch 286 (horizontal line
24X) is in its open position, relay 690, because it is a latching relay is mechanically kept energized, When / is so, its associated contact bars 690A and
690B are held closed, while contact bar 590C is held open.



   Because the brush 675 is in contact with the first pad of its row of pads, a circuit is established passing through the conductor 696, the contact bar then formed 690B, the conductors 697 and 683, as well as the control bar. contact then closed 672A to energize relay 672 of the rotary switch. As previously described, the rise of contact bar 672A de-energizes relay 672 and, thereby, the four brushes of rotary switch 645 are advanced to the second pad of their respective rows of pads.



   The coming into contact of the brushes 676 and 677 on their respective terminal pads has no effect on the circuit, since they are dead pads. Likewise, the contact of the broom
643 on its second associated pad has no effect on the circuit because the contact bar 699C is in its open position cutting the circuit between the conductors 698 and 692. The contact bar 699C is in its open position / that relay 699 is

  <Desc / Clms Page number 91>

 excited by a closed circuit along the horizontal line 8X starting from the conductor 632 and passing through the conductor 703, the contact bars then closed 690A and 702A to relay 699 which is connected to the conductor 671.

   Contact bar 702A which completes the circuit to relay 699 had been brought to its closed position by the earlier energization of relay 702 when closing contact bar 271U when the drum was advanced to place the second tool in. the machining cycle in the tool change station. Due to the energization of relay 699, its associated contact bar 699A short-circuits conductors 715 and 716, establishing a guard circuit for relay 699. Thus, due to the fact that the contact bar 699C is in its open position, there is no effect on the control circuit at this time when the brush 643 bears on the second pad.



   By coming to bear against the second pad of its row of pad *, the brush 675 establishes a circuit starting from the latter and passing through the conductors 711 and 717, the contact bar then closed 699B of the live relay 699 and the conductors 718, 697 and 683 to trigger relay 672 of the rotary switch. When relay 672 is de-energized by the rise of its contact bar 672A, the four brushes of rotary switch 645 are advanced to the third pad of their respective rows of pads.



  Due to the fact that each of the brushes 675, 643, 676 and 677 respectively bear on the third pad of their row of pads, circuits are established as previously described with regard to the tool change cycle transferring the first tool in. the machining cycle from tool storage drum 32 to spindle 45. Thus, brush 643 establishes a circuit to energize relay 640, and brush 676 establishes a circuit to energize relay 723. From the Similarly, the brush 677 establishes a circuit to energize the relay 732 effecting the rotation of the support

  <Desc / Clms Page number 92>

 40 clockwise.



     Lora of the support rotation 40 up. a vertical position as illustrated in Figure 1, the limit switch 298 is actuated, which brings its contact bar 298L to its closed position, which energizes the relay 738 which then closes a circuit (in the horizontal line 37X) to energize the relay: 672 of the rotary switch. When the relay 672 of this switch is de-energized, retort described above, the four balaia of the rotary switch 645 are advanced to the fourth pad of their respective rows of pads.



   The description just given shows that the circuits established by the first and second pads bearing against the brush 643 can only be energized during the tool change cycle to transfer the first tool from a machining cycle from the drum 32 to the spindle 45. During the transfer of the second and subsequent tools, the circuits starting from case pads are kept cut by the open contact bars 690C and 699C.



   Because the circuit for the remainder of the cycle for transferring the second tool operates identically as described previously in connection with transferring the first tool from tool storage drum 32 to spindle 45 as as the brushes advance successively to the ninth pad of their respective rows of pads, it is considered unnecessary to repeat the description of the operation of the circuit. However, it is emphasized that the various circuit conditions will change for each successive exchange of tools between drum 32 and spindle 45 during this particular machining cycle.

   Therefore, the operation of the circuit for transferring the third tool from the machining cycle is identical to that which has been described for the second tool. Likewise, the circuit operates identically for the transfer of the fourth tool. Note that the machining cycle is terminated when the last tool of the machining cycle is transferred from-

  <Desc / Clms Page number 93>

 from the spindle 45 to the tool holder 33 provided in the tool storage drum 32.



   At this moment, it can be seen that the machining cycle is really finished before the transfer of the last tool of the cycle from the spindle 45 to the tool storage drum 32. In this regard, it is not absolutely. necessary to transfer the last tool of the cycle to the tool storage drum before removing all tools from said drum and introducing different tools for a new factory cycle; e. It can be seen that the last tool of the machining cycle could be removed by hand from the spindle 45, releasing the jaw by direct action of a switching device (not shown).



   It will now be assumed that the previous set of tools used in the machining cycle has been removed from the tool storage drum 32 and a completely different set of tools has been introduced therein for the purpose of. 'a new and different machining cycle. In this new cossu machining cycle * in the previous machining cycle, the first tool is provided with a longer tool holder body and identified by a code so as to be "identified" by actuating the tool. limit switch 266 (in the horizontal line 24x, figure 18) and also shown in figure 3.

   In order to start a new machining cycle by pressing the push button switch 653 (horizontal line 29X), it is necessary to press a push button switch 790 (in the horizontal line 231) to reset the drum 32. When the switch 790 is pressed, a circuit is closed starting from the conductor 632 and passing through the contact bar of this switch to the coil 791 of an unlocking relay, then through a conductor 792 to conductor 671. Energizing coil 791 of the unlocking relay de-energizes relay 690 by bringing its contact bars 690A and 690B to their normally open position and its contact bar 690C to its closed position.

   Because the relay

  <Desc / Clms Page number 94>

      
690 opens and is de-energized, the end-of-run switch 286 is then found in order to identify the first tool of the machining cycle when the latter approaches the tool change station 38. As previously described, when limit switch 286 is actuated by the first tool in the machining cycle, it moves its contact bar to a closed position (horizontal line 24X) by closing a circuit to reset it. voltage relay 690. When the limit switch
286 opens, relay 690 remains in an energized state and that by mechanical means.

   When the relay is in an energized or energized state, the 690A contact bar is in its closed position conditioning a circuit to subsequently energize the 699 relay. The 690C contact bar is brought to its open position by switching off. the circuit between conductors 689 and 691 to prevent the drum from rotating clockwise when the brush 643 bears against the first stud of its row of studs in subsequent tool change cycles, that is to say when changing the second tool, etc ... As a result, the first and the second stud in contact with the brush 643 are dead studs after the first tool of the machining cycle has action - ne the limit switch 286 indicating that it is located approximately in the tool change station.



   Contact bar 690B is in its closed position due to actuation of relay 690 which bypasses conductors 696 and 697 by closing a circuit to energize the relay
672 of the rotary switch, in order to advance the four Values of the rotary switch 645 to the second pad of their respective rows of pads. Consequently, it can be seen that the initial reset switch 670 must be pressed either at the end of a machining cycle, or before the start of a new machining cycle which is released when press the switch 653, line 291.



   The electrical control circuit controlling the operation of the variant of the first embodiment which is represented

  <Desc / Clms Page number 95>

 Tent Figures 13, 14 and 15 is identical to that shown in Figure 18 and which is described below.



   Fig. 19 shows a modification of the present invention in which the movable tool change support 40 is operatively arranged to effect a tool exchange between the tool spindle 45 and a single tool storage recess.



   As explained above, the spindle 45 is mounted for rotation towards the upper part of the vertical column 26. This column is an integral part of an extending base 709. verp the front, above which is supported a vertically movable console 800, fixed so as to be able to slide in vertical guides 801 of the column 26.



  Transverse slides 802 provided on the upper surface of the console 300 support, with a view to its sliding, a transversely movable slider 803 on which is carried and slides a longitudinally movable table 805 supporting workpieces.



  A motor device (not shown) is connected in a well-known fashion to selectively cause a relative movement of the console 800, the saddle 803 and the table 805 on three perpendicular geometrical axes. machine (not shown) can be attached to table 805 for selective movement to a cutting tool (not shown), operatively secured in tool spindle 45. Although this is not not illustrated in Figure 19, the tool spindle 45 shown therein comprises an automatic tool clamping jaw 194, as well as the associated control apparatus illustrated in Figure 2. The same has been given. references to identify identical parts previously described and illustrated in the other figures.

   Thus, column structure 26 of Figure 19 is identical to column structure 26 shown in part in Figures 1 and 13.



  It can be seen, therefore, that the conical type drum 32 shown in Fig. 1 and the swivel type tool storage drum 501 of Fig. 13 can be applied equally.

  <Desc / Clms Page number 96>

 advantageously to a frame structure of a tool changer to be mounted on the vertical column of a console type milling machine.



  801st. Looking again at Fig. 19, it can be seen that the movable tool changer support 40 is supported by a modified hollow frame structure 28A to be able to adequately perform an axial and rotational movement relative to its positive stops. your 47 and 46. A movable stop 49 is likewise supported by the frame structure 28A so as to cooperate with the movable support 40 as a positive stop as well as as a movable guide part. Tool holder 40 is operatively disposed with respect to tool spindle 45 and a single fixed storage recess 806 tool receiver provided in the top of hollow frame structure 28A.

   The fixed storage recess 806 is disposed parallel to the tool spindle 45 which rotates in the upper part of the column 26 of the machine tool. In effect, the single storage recess 806 is designed to support a tool in a position identical to that of the tool change station 38 which has been described in connection with indexable storage drums. 'tools shown in figures 1 and 13.



   In the operation of a machine tool incorporating the modification shown in Figure 19, a tool would be manually pulled out of the single recess 806 and replaced with the next tool needed for the machine tool program. A tool is manually loaded into the single storage recess 806 during the interval that a tool fixed in spindle 45 is actuated to perform a cut. Therefore, at the end of a single tool machining, the next necessary tool is placed in the fixed storage recess 806 waiting for a tool change cycle.



   Once two tools are respectively mounted in the storage recess 806 and in the tool spindle 45, the movable tool holder is actuated to perform a tool exchange.

  <Desc / Clms Page number 97>

 tils between these pieces. The operating mechanism and mode of operation of the support 40 of FIG. 19 is the same as previously described herein in considerable detail with reference to the other figures. In addition, since no preliminary positioning or indexing is required the control circuit is considerably simplified.

   In this connection, however, it is believed that the control circuit fully described in connection with the schematic of Fig. 18 is suitable for controlling the simplified modification of the present invention illustrated in Fig. 19.



   The detailed description which has just been given of the embodiments of the invention, given by way of illustration and without limitation to expose the present invention, shows that the applicant has designed an improved tool change mechanism in combination with a new tool storage device.



   Although these embodiments have been described in considerable detail to set forth a practical functional structure permitting advantageous implementation of the present invention, it is understood that they have been given only by way of illustration and can be made useful thereto. various modifications without departing from the spirit and scope of the present invention,


    

Claims (1)

CLAIMS 1.- Machine tool, characterized in that it comprises: a tool spindle driven in rotation by an energy; indexable tool storage member comprising a series of fixed tool receiving storage recesses; control devices connected so as to move the storage member so as to indexably dispose a recess chosen in advance from the aforementioned recesses in a tool changing station, so that the axis of the recess thus arranged either in a tool change relationship parallel to the spindle axis; movable tool engagement holder mounted to move axially and angularly along a common axis disposed in a fixed relationship parallel to the tool spindle, said tool holder (1) being angularly movable in a position recalled so as to engage two tools respectively carried in the recess arranged by indexing the drum and in the tool spindle (2) being axially movable to an outwardly extended position to extract the tools engaged, (3) being angularly movable in the extended position to exchange the positions of the tools engaged prior to their reintroduction, (4) being axially movable in the recalled position to reintroduce the exchanged tools and (5) being angularly movable in the opposite direction when it is not in contact with the tools exchanged until it is returned to a rest position; several stop device placed so as to positively limit the angular displacements of the aforementioned mobile support both in its extended position and in its recalled position; finally, motorized drive devices comprising control devices connected so as to move the movable support both angularly and axially in order to perform a single exchange of tools between the spindle and a recess arranged by indexing and part of the drum. <Desc / Clms Page number 99> 2. - Machine tool, characterized in that it comprises; a frame; a tool spindle mounted and rotating in the frame of the machine tool and used to receive a tool; Indexable energy-driven tool storage drum is mounted on this frame in functional proximity to the spindle and serves to hold a series of tools in view. of their selective transfer to the spindle, this drum being mounted on the frame so that its axis of rotation makes an anle of 45 * with the horizontal, and said plowing being carried out so as to contain tools in a row in a cone of revolution so that the longitudinal axis of each tool intersects the axis of rotation of this drum; a tool changer member comprises two tool gripping recesses and it is movable in a block at some distance from the ambour and the spindle, this tool changer member being axially movable and also being able to rotate, and being able to be selectively operated to exchange tools between the aforesaid spindle and storage drum; mechanical locks are supported in parts of the aforementioned changer member which extend in opposition; each lock can be actuated to lock a tool in its corresponding gripping recess both during the rotation and during the axial displacement of the tool changer member; a rigid stopper is fixed to the frame in a position where the component changer can meet it when the latter is in an axially returned position and when it has rotated to fully engage the tools to be exchanged; an axially movable stopper is supported by the frame and is biased by a spring in a first direction up to a predetermined position; an actuator controlled by an energy axially displaces the stopper in the opposite direction to a predetermined position, said movable stopper being able to be placed so as to be encountered by the tool changer member when the latter rotates up to 'to a tool insertion position when it is in an ex- <Desc / Clms Page number 100> positive tool receivers To the other tool receiver device; a movable stop can be renccntrée by the support. movable stopper during its actuated to transfer a tool from one tool receiving device to the other tool receiving device, this movable stopper being able to function to stop the movement of the movable support in one direction and to guide the movement of the movable support in the other direction. 5. tool chine, characterized in that it comprises: a rotary tool receiving recess; a tool spindle mechanically rotated and capable of including said movable recess for moving a tool supported therein to perform machining; a tool receiving storage recess supported in parallel some distance from the spindle; tool holder mounted so as to move axially and to rotate along a common axis parallel to the spindle, this tool holder concurrently as a tool receiving recess; a first drive device connected so as to rotate the movable support when the latter is in the recalled position in order to grip a tool supported by one of the aforementioned recesses to rotate the movable support in the same direction in a extended position to bring an extracted tool into axial alignment with the other of said recesses, and to rotate the movable support in the opposite direction when it is in the recalled position in order to release the reintroduced tool; a second drive device connected so as to axially move the movable support from a recalled position to an extended position to remove a tool for a tool exchange, and to move the movable support in the opposite direction from its extended position to its recalled position in order to reintroduce the exchanged tool into the other of said recesses; a positive stop pldée so as to control the positioning movement of the movable support in a recalled position; a movable stop supported in the recalled and connected position <Desc / Clms Page number 101> so as to be moved by said drive device from a recalled position to an extended position to adjust the rotation of the movable support in its axial extended position; finally, a commando device in sequence connected so as to actuate in a coordinated manner the first drive device to actuate the movable support in order to effect the transfer of a tool from one of the recesses to a nose. 'to the other of these recesses. 6. Machine tool, characterized in that it comprises: a rotating tool spindle driven by energy and a movable workpiece support driven by energy and movable relative to this spindle; a tool storage and change mechanism comprising a hollow frame fixed to the aforementioned column; a tool storage device comprising a tool storage recess supported by said frame and intended to support a tool chosen in advance parallel to the tool spindle; a mobile tool change support supported by the frame so as to be able to move axially and to thunder with respect to the spindle and to this storage recess; a motorized drive device comprising a control device carried by the frame and connected so as to effect coordinated movements of the movable support to determine a tool exchange between the storage recess and the tool spindle; finally, ': a movable stop carried by the frame in a position normally recalled and connected so as to be moved by this drive device to an extended position to positively control the rotation of the movable support, said movable stop being arranged so as to ;; help the mobile support for its axial movement of inserting tools. 7. Machine tool, characterized in that it comprises: a mechanically driven tool spindle; a tool receiving recess carried by said spindle; a storage recess <Desc / Clms Page number 102> tool used to carry a tool chosen in advance at some distance from the recess of the spindle; a movable support comprises a tool engagement device supported so as to move in one block to effect a tool exchange between said recesses; a motorized device comprises a control device operable selectively to actuate the movable support to cause the execution of a cycle of tool exchange movements; positive fixed stopper and a movable stopper are functionally placed so as to positively control different predetermined movements of the movable support during a tool exchange cycle, this movable stopper being connected so as to be moved by the aforementioned motorized device from an inoperative position to an operative position to control the movement of the movable support during part of its tool change cycle. 8. Machine tool, characterized in that it comprises! ! a tool spindle; a rotary tool storage drum comprising a series of rod-extending and peripherally spaced guide slots; a series of separate supports receiving a tool, respectively mounted in the aforementioned guide slots of said drum so as to be able to pivot individually and selectively to a position where they mount parallel to the tool spindle; a reversible drive device operable to pivot a selected support by advancing a tool outwardly near the tool changing station; a reversible and indexable drive device connected so as to rotate the drum in a first direction to bring a support chosen in advance of a tool a little beyond the tool changing station; an indexing control device responsive in a predetermined manner to the indexing movement by rotation of the drum and connected so as to reverse the direction of rotation of the drum and simultaneously to actuate the disc. <Desc / Clms Page number 103> positive reversible drive above to rotate the tool support (selected by advance) aforementioned to ur.e position where it is parallel to the axis of the tool spindle; a positive butas which acts during reverse rotation of the drum to pick up and position said tool holder (having rotated outwardly) in the tool changing station; a tool change mechanism operating to extract the tool from this tool support in the tool changing station and to introduce this tool which has been extracted into the spindle; finally, a drive device actuated by energy and connected to actuate this tool change mechanism to effect a tool transfer movement. 9. Machine tool, characterized in that it comprises: two recesses spaced from one another and each intended to receive a tool; a tool spindle driven and serving to support one of these recesses; a movable tool holder the movable tool operated to execute a tool change cycle in order to perform a block exchange of tools carried by said recesses; a movable stopper supported so as to move from an inactive recalled position to an active extension position to center the movable support while guiding it; a mechanical drive device comprising a control device functioning aelectively to move the movable support and said movable stopper in order to cause an exchange of tools between the aforementioned recesses, this mechanical drive device functioning to positively maintain the movable support in contact guideable with said movable stop during a predetermined part of a tool exchange cycle. 10. Machine tool, characterized in that it comprises: storage devices receiving tools; mutually spaced operating devices accommodating tools and <Desc / Clms Page number 104> comprising a rotating tool spindle; a movable tool support is movable by extension from its recalled position to extract a tool from one of these tool receiving devices; the support is laterally movable in a plane perpendicular to its path of extension movement in both its recalled and extended positions, and is reversibly movable from its extended position to its position. tion reminds us to insert a tool in the other of the devices! the aforesaid tool receivers; several stops are operatively placed so as to control the lateral displacement of the tool support both in its recalled position and in its extended position; finally, a drive device actuated by energy is connected so as to effect the selective lateral and extension displacements of the movable support to execute a cycle of displacements for transferring a tool integrally from the ur. tool receiving devices Until the other of these devices, the aforementioned drive device actuated by energy being connected so as to positively hold the mobile support against a predetermined stop among said stops. 11. Machine tool, characterized in that it comprises: a tool storage member and a mechanically driven rotary tool spindle; a transfer mechanism moved so as to cause an exchange of the tools carried respectively by said member and said spindle; and a driven drive device comprising control devices connected to move said mechanism to effect a tool exchange. 12. tool chine, characterized in that it comprises: a mechanically driven rotary tool spindle comprising tool receiving means; an indexable tool storage chute mounted so as to rotate: around a geometric axis inclined with respect to that of the spindle and it comprises a series <Desc / Clms Page number 105> conical of tool receiving recesses each of which forms with the axis of the drum an angle identical to the angle between the respective axes of the drum and of the spindle; a mechanically operated indexing device is connected to selectively rotate the drum to indoxibly position one of the tool receiving recesses in a tool change relationship parallel to the spindle; a motorized tool change mechanism serves to exchange a block of the tools respectively carried by the spindle receiving device and a recess, machined in the storage drum, and put into position by indexing. 13. Machine tool, characterized in that it comprises a pair of spaced devices receiving tools; a movable tool engagement support axially displaceable and rotatable in order to exchange two tools reapectivomont carried by the aforementioned receiving devices; a movable stopper being able to be arranged so as to end one of the rotational movements of the movable support, it is movable with the latter and it guides it during one of its axial displacements; finally, a drive device actuated by energy comprising a control device operatively connected so as to move the movable support for the execution of a tool change in a manner coordinated with the operation of said movable stop. 14. Machine tool, characterized in that it comprises: a pair of spaced devices receiving tools; a mechanically driven tool pin for supporting one of said receiving devices to actuate a tool to perform a machining operation; a movable tool holder having spaced tool attachment recesses; the aforementioned movable support being movable from a rest position to effect a tool exchange between the aforementioned receiving devices; this mobile support being mounted so as to move axially <Desc / Clms Page number 106> ment in a first direction to extract tools from these receiving devices and being axially movable in an opposite direction to introduce into these receiving devices the tools that have been exchanged; a tool locking device mounted in the movable support in operative proximity to the tool attachment recesses and releasable to lock the tool therein; a cam actuator supported at a fixed distance from the movable support and the tool locking device it supports; this cam actuator is initially actuated to operate the tool locking device to a released position so that the recesses in this tool attachment are moved with the movable support to clamp said tool; cam actuator operates during axial displacement of the movable support outward to actuate the aforesaid locking device to positively lock in said recesses the tools which have been engaged; This cam actuating device operates during the axial movement of introduction of the movable support to actuate the locking device to its released position to prepare the return of the movable support from its position for gripping the tools exchanged to its position initial rest; a mechanical drive device comprises control devices connected so as to move the movable support from its rest position to grasp two tools respectively carried by the aforementioned receiving devices, in order to effect the exchange of the position of the tools in these receiving devices and in order to bring the mobile support back, by freeing it from the tools, to its initial rest position. 15. Machine tool, characterized in that it comprises a rotary tool spindle with a first tool receiving device; an indexable storage device comprising devices <Desc / Clms Page number 107> tif tool receivers, ce3 devices having been mutually spaced in a predetermined manner; a movable tool engagement support operably movable for integrally exchanging two tools mounted in the receiving devices respectively provided in the aforementioned tool broach and storage member; several mutually spaced positive stops limiting certain movements of the movable a ipport during its operation to effect a tool exchange; a tool blocking device carried by the movable support functioning to liberally block the tools therein; a fixed cam device arranged so as to selectively actuate this tool locking device during the movement of the movable support; a drive device actuated by energy with control devices connected so as to effect the displacement of the movable support with respect to said positive stop to effect an exchange of tools between the mutually spaced receiving devices tools which are respectively provided in the spindle and in the storage member. 16. Xachine-tool, characterized in that it comprises a rotary tool spindle with a first tool receiving device; an indexable storage member with tool receiving devices spaced apart in a predetermined manner; a movable tool engagement support operably movable for block exchange of two tools contained in the receiving devices respectively provided in the aforementioned tool spindle and 1 storage member; a movable locking device, associated with the movable support for releasably locking tools therein; a fixed cane device connected so as to selectively operate this locking device during the mobile operation of the mobile support; and a mechanically actuated drive device with devices <Desc / Clms Page number 108> da command to move the mobile support in order to cause a tool exchange. 17. tool chine, characterized in that it comprises: a relative tool storage drum having several guide slots extending radially and spaced peripherally; a plurality of separate tool receiving supports a journaled respectively in the guide slots of said tanbour for the individual selective displacement by pivoting towards an actuating station; reversible mechanical drives connected to pivot a predetermined tool holder outwardly into proximity to the actuation station; a reversible indexable device connected to rotate said drum in one direction to bring a predetermined tool holder slightly beyond said actuation station; an index control device responsive to a predetermined rotational movement of the drum connected so as to reverse the direction of rotation of the drum and at the same time to actuate the reversible drive device to rotate the predetermined support d 'tool outward to near the actuation station, and a positive stop serving during the reverse rotation of the drum, to meet and position in the actuation station said tool support having rotated outward . lb. Tool changer mechanism, characterized in that it comprises) a frame; a support carried by said frame so as to allow axial and rotary displacement; said support being provided with tool-carrying devices; a pin carried by said frame and spaced from said support; a stop supported by the tool change mechanism and selectively movable relative to the aforementioned movable support up to a displacement path described by the rotation of the movable support in order to stop the rotation of the latter and dispose one of the <Desc / Clms Page number 109> tool support devices of the movable support parallel to the longitudinal axis of the spindle; and a motor device connected so as to move the movable support with a control device for selectively moving the abovementioned stop. 9. Tool change mechanism with a frame characterized in that it comprises: the tool change mechanism comprises a movable support supported by the frame and capable of tool holding devices, a spindle spaced from said support, : a movable stop supported by this frame so as to selectively come into contact with the movable support to stop its movement in order to align the tool holding devices in a predetermined relation with respect to the tool spindle , and a mechanical drive device is connected so as to move the aforementioned stopper and the movable support relative to each other. 20. Machine tool provided with a frame, characterized in that it comprises: a mechanically driven spindle mounted for rotation in said frame; a mechanically driven tool storage magazine, supported in a straight line, indexable by said frame and provided with several slots spaced peripherally; several tool supports movably carried in the slots and each intended to detachably receive a tool; a device connected so as to indexably locate said magazine and to move a selected tool holder outward to a tool change station; a mechanically driven tool changing mechanism comprising a support operatively carried by said frame to allow rotational and axial movement; said holder being arranged spaced from said magazine and from said spindle in order to exchange tools therebetween; an axially movable stop carried by the tool change mechanism and selectively movable to a position of interference with the rotational movement of the movable support to predeterminedly terminate the rotation <Desc / Clms Page number 110> mobile support; a mechanical drive device connected to move the aforementioned magazine and stopper in a predetermined co-ordinated relationship for exchanging tools between a support selected from among the tool supports and the spindle. 21. Tool transfer mechanism, characterized in that it comprises: two mutually spaced devices for receiving tools; a spindle mechanically driven in rotation and supporting one of these tool receiving devices; a tool holder comprising a first mechanical drive device and operating to exchange tools between these tool receiving devices; movable stop sensitive to the actuation of this first drive device; a second mechanical drive device connected to move the tool holder in a direction different from that communicated by said first mechanical drive device; finally, a third mechanical drive device connected so as to give an additional displacement to the aforementioned stop to control the displacement of the tool holder when the latter is moved by the aforementioned second drive device. 22. Machine tool provided with a frame, characterized in that it comprises: a spindle mounted in said frame; a tool storage device is disposed some distance from the spindle and it freely supports a tool which is selectively presented in a predetermined position relative to the spindle and a stop, placed some distance from the exchange device. The tools operate selectively in the area described by the movement of the tool exchange device because it is totally in selective contact with the tool exchange device so as to limit the movement of this device in positions predetermined for exchanging tools between the spindle and the tool storage device. <Desc / Clms Page number 111> 23. Machine tool provided with a tool changer mechanism, characterized in that it comprises: a frame, an indexable tool magazine driven mechanically, supported by said frame and descended to carry several tools; a spindle drove '! mechanically and rotatably mounted in said frame; a tool changer member driven mechanically and carried by said frame so as to allow a rotary and axial displacement in a spaced manner with respect to said spindle and to said magazine; a fixed stop member mounted on the frame in a position of engagement with said changer member when the latter is rotated into an axially retracted position of tool engagement in order to mechanically and positively locate said changer member in a position of tool removal; movable stop member carried by said frame in a clogging position with said tool changer member when it is in an axially extended position in order to locate said changer member relative to said spindle and to said magazine; and a control device operative to selectively actuate the tool changer, the magazine and the aforesaid spindle to effect a tool exchange between the spindle and the magazine. 24. Tool changer mechanism, characterized in that it comprises: a frame; a mechanically driven spindle rotatably mounted in said frame; an indexable tool storage drum for releasably supporting a plurality of tools and acting to locate a selected tool spaced from said spindle; a mechanically driven tool changer member selectively movable in three planes and spaced apart from said spindle and said drum to act to interchange a selected tool in said drum and a tool in said spindle; a stationary member arranged relative to the tool support so as to limit the movement of the tool changer member <Desc / Clms Page number 112> in a first displacement plane; an adjustable member arranged relative to the tool support so as to limit the movement of the tool changer member in a second movement plane; finally, a mechanically actuated control device moving the tool changer member to exchange tools between the aforementioned spindle and the drum. 25. Tool selector mechanism, characterized in that it comprises: a slide comprising a movable guide part; a tool structure movable along this slide to a position adjacent to said movable guide portion; finally, a device for positioning said tool structure in the vicinity of the movable guide part and comprising a reversible device for pushing this movable guide part and this tool structure to a control station remote from said slideway. . 26. Machine-tool, characterized in that it comprises: a tool storage device; a mechanically driven tool receiving spindle; a support provided with a tool gripping device for releasably securing a tool thereto, said support acting to exchange tools en bloc between said storage device and said spindle; a locking device with a movable plunger supported by the aforesaid movable support near the tool gripping device in operative relation thereto, this locking device being selectively operable to lock said plunger by means of a movement of the movable support in one direction and to unlock it by means of a movement of the movable support in the opposite direction; a cam device supported near the locking device selectively actuating it during movement of the movable support; finally, a device selectively moving the mobile support to exchange the tools between the aforementioned storage device and the spindle and to put the <Desc / Clms Page number 113> locking in contact with the cam device, in order to actuate the locking device so as to release the tools located in the tool gripping device from the mobile support during a tool exchange. 27. chine-tool, characterized in that it comprises:; a tool receiving spindle combined with a workpiece support carried so as to perform a positioning movement in one block in several perpendicular planes; a one-piece tool storage and tool change mechanism comprising a hollow frame fixed to the machine tool, said unlit frame provided with a tool receiving recess axially disposed in parallel at the spit; finally,. a tool changer arm carried by the frame so as to move axially and to rotate around a geometrical axis parallel to the axis of the tool spindle, in order to exchange one block tools respectively carried by the tool spindle and the tool notch recess presented by this frame. 28. Machine tool, characterized in that it comprises: a matrix or indexable internent for storing tools supported so as to move relative to a control station and provided with a series of storage recesses for tools; a coded tool supported in one of the recesses of said die; a series of non-coded tools removably supported in other recesses of the die in a predetermined order by attaching to said coded tool, all these tools constituting a group of tools identified by code and necessary to be presented selectively and in succession at the control station during a machining program of the machine tool; a motorized drive device connected so as to move said die relative to the control station; a code responsive device, which is supported in a position where it can be actuated by said encoded tool during movement of the die; device <Desc / Clms Page number 114> indexing control device, which is actuated by the operation of the above-mentioned device sensitive to a code to stop the above-mentioned motorized drive device and said die so as to place the coded tool in the control station, this control device d 'indexing being conditioned by the aforementioned device sensitive to a ccde to control the displacement of the die in order to advance by successive steps when the motorized drive device is reactivated during the same program, whereby the tool identified by a code and the tools not identified by a code are presented at the control station in a predetermined order. 29. Linkage mechanism intended to describe a curvilinear path, characterized in that it comprises: a base; a U-shaped link hinged to the aforementioned frame; two L-shaped links articulated to the frame; a member permanently fixed to the opposite ends of the two L-shaped links; a first pair of links articulated to the L-shaped links and to the U-shaped links; a movable guide section hinged to one end of the links of the first pair of links; a second pair of links each having one end hinged to said movable guide section and the opposite ends of which respectively are hinged to the L-shaped truss links; finally, a motorized actuator, one end of which is articulated to the aforementioned base and of which the opposite end is articulated to said movable guide section, whereby the aforementioned motorized actuator moves the guide section movable 3ur an arc around an axis perpendicular to the rectilinear displacement of the first and the second pair of links. 30. Machine tool with a frame; characterized in that it comprises: a tool storage drum rotatably mounted on said frame; multiple mobile tool structures supported <Desc / Clms Page number 115> by said drum and each intended to releasably carry a tool; a stop carried by the frame to stop the movement- mount of the aforementioned drum and of the aforementioned tool structure thanks to a selective bringing with said tool structure, and a device moving the tarr.bour with respect to the frame comprising a device for selectively pushing one of said tool structures into position to cooperate with said stopper during movement of the drum relative to the frame. 1. Machine tool, characterized in that it comprises: a mobile tool storage matrix provided with several spaced recesses for receiving tools a first coded tool and several non-coded tools are removably supported according to a predetermined order in the recess made in the aforementioned die; a motorized drive device is connected so as to move the die to position a tool, chosen in advance, at the tool changing station; a selectively operable indexing control device is connected so as to control the aforementioned motorized drive device; a device responsive to a code and actuated by the coded tool during the movement of the die comes into action so that the index control device can be actuated to control the aforementioned motorized actuation device; a functionally carried tool receiving spindle spaced from the tool changing station; and a tool changer mechanism driven mechanically and acting to effect a tool exchange between said spindle and the die storage recess located at the tool exchange station. 32. Machine, characterized in that it comprises: a storage member having several tool receiving recesses; several tools carried releasably by said J recesses in a predetermined order; a coding structure associated with one of the tools to indicate the position of this tool in the aforementioned storage member; a device sensitive to a <Desc / Clms Page number 116> code, supported near this storage member in a position where it can be actuated by said coding structure; a selectively operable motorized drive, connected so as to initially effect an overall movement between the storage member and the aforementioned device sensitive to a code; a control device connected so as to make the aforementioned motorized actuator inoperative when the device sensitive to a code is actuated, to stop the movement between said member and the device sensitive to a code, in order to position the device. the aforementioned tool associated with said coding structure in a predetermined control station; finally, a control device in sequence, conditioned by the actuation of the device sensitive to a code can perform the following intermittent activation of this drive device in order to cause a selective indexable movement between the aforementioned storage member and the available device. - sensitive to a code, in order to successively position said non-coded tools, arranged in sequence, in the predetermined position left free by the aforementioned coded tool. 33. Machine tool, characterized in that it comprises a tool receiving storage device and, at a certain distance, a tool receiving actuating device comprising a mechanically driven rotary tool spindle; a movable block tool exchange support, comprising a releasable and movable tool lock; positive cam devices located to actuate the tool lock and control the situation of said holder during its tool exchange movement; and a mechanical drive device connected to said holder for transferring a tool from one of said receiving devices to the other.