US1126634A - Central-control cone-drive machine. - Google Patents

Description

R. T. HAZELTON & S. EINSTEIN. CENTRAL CONTROL 00m DRIVE MACHINE. APPLICATION FILE-D SEPT. 11, 1914.

1,126,634. Patentedian. 26,1915.

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CENTRAL CONTROL CONHDRIVE MACHINE. APPLICATION FILED sEFT. 11, 1914.

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Patented Jan. 26, 1915.

UNITED STATES PATENT OFFICE.

ROBERT T. HAZELTON AND SOL EINSTEIN, OF CINCINNATI, OHIO, ASSIGNORS TO THE CINCINNATI MILLING MACHINE 00., OF CINCINNATI, OHIO, A CORPORATION OF OHIO.

CENTRAL-CONTROL CONE-DRIVE MACHINE.

Specification of Letters Patent.

Patented Jan. 26, 1915.

To all whom it may concern:

Be it known that we, ROBERT T. HAZEL- TON and SOL EINSTEIN, citizens of the United States, and residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented a new and Improved Central- Control Cone-Drive Machine, of which the following specification is a full disclosure.

This invention proposes an improved machine-tool organization and it deals more especially with machines in which speed variations of the spindle are obtainable, as by means of a direct-acting cone-pulley, and in which the table or carriage 1s propelled through a feed-change mechanism by an appropriate transmission system which initiall'y derives motion in direct proportion to the speed of the spindle, and ultimately transmits the same through said feed-change mechansm to said table or carriage. Now. this invention endeavors so to organize the above stated arrangement thatthe feedchange mechanism will be positioned as a unit on gan appropriate frame-unit in close proximity with the under surface of the table or of the element providing the table slide, and preferably below the path of travel of the table, and provided with one or more control levers mounted on that side of its housing adjacent and within the immediate reach of the attendant, whereby he will be enabled to govern the rate of the feed of the table without shifting his position.

Another object within the contemplation of this invention is to formulate an arrangement in which the entire feed-change mechanism will be mounted on or carried by one or more of the floating frame-units, in cooperating relation with a tie) aission that initially derives motion at a rate direatly proportional to the speed of the spindlewand which transmits said motion through said feed-change mechanism to enable the table to be fed at the pro-determined rate.

Other objects will be in part obvious from the annexed drawings and in part indicated in connection therewith by the following analysis of this invention. 7

This invention accordingly consists in the features of construction, combination of parts and in the unique relations of the .uembers and in the relative proportioning and disposition thereof; all as more completely outlihcd herein.

To enable others skilled in the art so fully to comprehend the underlying features thereof that they may embody the same by the numerous modifications in structure and relation contemplated by this invention, drawings depicting a preferred form have been annexed as a part of this disclosure, and in such drawings, like characters of reference denote corresponding parts throughout all the views, of which I Figure 1 is a side-elevation of a milling machine of a knee-and-column cone-driven type and typifying the manner in which this invention may be embodied. Fig. 2 is a diagrammatic drawing, depicting a gear arrangement such asmay be used for deriving a series of feeds as well as a quick-traverse of the table; the various gears being brought into one planeto avoid the confusion incidental to an ordinary drawing. Fig. 3 is a side-elevation looking to the right of F ig. 1, showing a portion of. the tablefeeding transmission which derives motion from the spindle; and also showing the quick-traverse pulley which in this instance derives motion from the counter-shaft independently of the spindle.

To obtain an adequate understanding'of this invention, it should be kept in mind that the term feed as used herein indicates any one of a series of relatively slow movements of the table, such as essentially are suitable for tooling o erations; and the term feed-change mechanism or feed changer indicates only that particular organized gear-set which determines the rate at which the table thus feeds, and is to be distinguished from such'variable-speed devices as may be arranged to effect changes not identified with the tooling operation, as well as from the cone-pulley herein referred to and which determines therate of rotation of the counter-spindle.

Before detailing the specific feat'ures'of construction whereby these functions are attained it will be convenient first to describe certain major elements of a conventional milling machine. These comprise a table Y that supports the Work and which is reciprocated t0-and-fro to subject the work bolted thereon to the effect of the tool or cutter that is secured to an appropriate tool-supporting member here typified by a spindle X which, in this instance, is continuously rotated by power derived from the same between the :lramonnit a ports the spindle or tooleiipporting member and the frame-unit O that directly mounts the table. In the type of machine illustrated, the inteiponent framc-nnit B is 601D. nionly'terined a lniee; the table-supper ing frame-unit C is usually tern a saddle, and the spindle mounting iraineaiiii't A is generally termed a column W The chief mechanical cha 'acteristic of the interponent frame-unit B is that it provides for a relative vertical adjustment as to the spindle-n1ounting unit, and a horizontal adji stmeet as to the table-supporting unit, in a direction transverse to the other.

The spindle-mounting frame-unit, or column A, has heretofore been that also selectccl to rest on the floor and thus providea foundation for the machine, as a Whole, and it has also been utilized to support or mount both the change-gear mechanism that varies the speed of the spindle, as Well as the change-gm mechanism that aries the rate of feed of the taljrle Thim however, has re salted in a very co iiderahlc inconvenience to the at endant in I1ili1l1i]')l'llltll1 the ma chine. That is to say, the tt imist be stationed at the outer lo gitudh l e of the reciprocating table ill order to :si crntinixe the action. of the machine, hut, 'w en so eta tionech he out o tCll cl the .t'. 'ers that e'll'ect all the chain es of the rate of feed or? the talole so )l'tldl' to malie these changes he mu. 1 his oosition.

This iijn'enlzioii noposes, a long other thiiiigs, a rearr t meet and a recoun tion oi the contioi Ieinents as to I so-called colunm olfthe niachioe tron: the n :uhanisn, tlmt caverns the ra at which the tahle shall i A and so hllUOtltt hr com ine it will;

the attencilantj when l mi 'itudinal the rcciproiaiiiii" :trmn tilt) Wail r ,i- {it t" and oitii'rin, will he u hi0, l:

which the table feet social during a cutting v the direction ol travel ot the t:

l eithc I to stop the mofien'ieht oil: the iahle either manually or a;itomaticallin in ca me; out

this aspect this invention, one 0." tin: carrying the T ht oil' the tahlc may 3" ine any conveiiti: :al preportior or coilfiguration soon as :11 indicated on. the drawings, but with this d ,tinction that is Little;

contrived also to sn mart or t ot What may be t i i.

lJOll', to, the cisiiig and ing a cliange-g ear inccha J hex ma i w ill Will.

y e. t1 7 is of IWJ'i it more comer one aspects ot tl he obtained by tracin through the machine in descri} ion cf the :atrnct'u'al "mired.

The means for iilllflhill' 'c y the tahe hle dink oh fl new hedes: llJQCl. Tlhii inssioa which iuiic wi Oi as little less oi T .le, to the station at which the actual mill 5.; begins, lleterrii to Fig. L, .lEL'. dear t is pulley mounted at one side of? the mini fl d" en indepcndcntly elf the a ineans'ot' belt 1 which in :h

the table,

receives motion from a siitahlc comitcr- 0 shatt, he e .a Oil the il lley i jonr naled a suitable hrac or ll( sing; M

mouw il at one side of the coho this alley shaft tGlllllllfllU, in a a Whiv is in turn connected to .r: shai U, the other end of which to a l raclcle coimectcd to the shall 9 "12 i shalt will he ci'aistaiitly driven at a M 1) 1 1 T .1 to

e. 1c Us. .l is occultd to the at the ehalit l) and 1t co' crates :ahch'l; l (typilyiii t icnal part) which is against as by means oi. a a

wnally retained by a a l which is in turn joi of the hi mount h,

as looeel y' to (Ill'illilkiiil haltfil. screw it 1" anv desired i on the two l3 -ehanci1t Ely z t :i H ihody- .Hm the ilUlP i1; or yiel the in tia 1nd save H A 3min damaging mic oi: The

- seen i the w th the result t he table at A aoriate tained by geai i, iiiiotion mt the shalt t 1539 through a suitable feed-change mechanism so as to obtain any desired rate of reduced travel corresponding with the tooling to" be 1 done.

The means instrumental in transmitting motion from the sleeve 10 to the table may embody a bevel gear 11, which is restrained against axial movement and meshes with a bevel 12 here shown as secured to a shaft 13, which in turn carries a beveled gear 14 at its upper end and which meshes both with the bevel R and the bevel L which are journaled in the table support C, here instanced as a saddle. Passing through these bevelgears R and L is a sleeve 1.5 which 'is normally in loose relation with these bevels, but which is splined to the shaft 16. In, this embodiment, this shaft-or feed-screw 16 is fixed against translation by means of the collars 17, and it is provided with screwthreads 18 meshing with a nut l9'that is non-rotatably mounted on the table Y so so asto translate therewith. By this means, thetable will be caused to travel at the rate determined by the rotation of the screwshaft 16. p A motion-reverser isv interposed in the transmission extending from 10 to 19 and it comprises a clutch-member J which is splined'to the sleeve 15 and carries clutchteeth at its ends whereby it may be engaged and, when it is shifted to teeth on the beveled gears R and L, so that, when the clutch member J is shiftedito the one side, the table will be causedgto travel 'to the right the other side, the table will be caused to travel to the left. \Vhen this clutch-member is shifted on the sleeve 15 to an intermediate position, no motion at all will be transmitted, and hence the table will cease to travel.

' The spindle-actuating system may now be described.

At a convenient point on the column A is journaled a spindle X which is rotated at the desired rate of speed by power transmitted through either of the steps do, m or m and derived from an appropriate belt P driven in the usual manner from a COUIltBll-Shflft. This constitutes a drive for the spindle with corresponding which embodies a speed-change mechanism,

as typified by the cone-pulley.

The table-feed transmission will now be detailed. In the embodiment under description, this transmission derives its motion directly from the spindle (instead of directly from a prime-mover) so as to be actuated in. the first instance at a rate directly proportional to the speed of the spindle.

- G at a corresponding rate.

This transmi ion in the form here shown includes a s rocket-wheel 1 WhlOh'lS dicated on Fig. 3. Secured to the sprocketwheel 3 is a gear 4 that meshes with the gear 5 to which in turn is secured the knuckle 6. An extensible shaft 7 connects the knuckle 6 with the knuckle 8, which latterminal-member may be considered to be 7 the sleeve 10' which is looselymounted on the shaft 9 and is devised to be shifted thereon so as to be connected on the one hand with the quick-traverse transmission, or on the other hand with the feed-change transmission, as by means of appropriate clutch-teeth at its respective ends. This sleeve 10 maybe shifted or positioned manually or automatically, as by the mechanism described fully in our co-pending applica tion, Serial #850175, filed July 10th, 1914-.

The remainder of. the feed motion transmission, including the gearing enabling the rate of feed-to be varied, willnow be described. In this embodiment, this transmission-also extends frgm the initial terminal-member 1 to the ultimate terminal-memher 10,.which in this instance is shiftable. Splined to shaft (Z are two shiftable gearunits ed and d. The former carries the gears d and gear (1, and the latter carries the gears d and d", and the purpose of en abling these utilize one or another of said four gears for propelling or transmitting purposes. Keyed to a shaft journaled in parallelism with shaft d is a series of gears D, D D and D which is so arranged that gear a?" may be brought into mesh with gear 13, and so on. In a suitable manner, motion is rived from one of these five gears. Thus, the gear-unit g carries a gear g which may bebrought into mesh with gear D by alati pendent upon the character of the foregoii internieshing; with the efiect that gear y which is fast to the sleeve 9 will directl drive the gear G2 and indirectly the gear The gear gear bearers to be shifted is to and the sleeve 9 constitute terminal niembers, either of which may be brought into propelling relation with a gear h which is splined to and. therefore drives the shaft h. This" connection is eliected on the one hand by the clutch-teeth at the end of the sleeve 9 Fixed to the'end of the she. 7% is a driving disk-h which carries 2 pin h that projects into a corresponds cess in the companion disk h and th drives the gear The purpose at 43%;;

pin arrangement is to centralize all possibility o1" .t'rziicture on the pin lr 'so asto cause the brealrage to occur in an easily, replaceable element nice of any undue load. By this construction, a positive drive for all safe loads is insured, during all tooling c313 erations thereby enabling definite :leeds and effects always to besecilred, while yet avoiding any consequential damageto themachine in the event of excessive. loads due either to accident or bad judgment on the part or" the attendant. By combining this positive teed safety devicewit h the abovedescribed impositive quick-traverse safety means, the attcndai'it becomes able safely to urge the machine to its utmost output from all stnndpoints. ltshould be noted that a primary characteristic this combination is that it results in an ellf'e'ct unattainable by m an s ol. a single safety means of ordinary construction; that is to say, this combination a i'ords a differential effect that correct safety points are provided both for the relatively slow, but necessarily pow eril'ul feed ol' the table, "as well as for the speedier and less resisted quick-traverse oil? the table. in accordance with this in.- vention, the safety" feed device will. be so constructed. as'to transn'iit a predetermined stre such that the table will be fed against the resistance of sale tooling operations, and yet so as to yield or fail to trans niit oh 1 an undue resistance accrue. For cramp in this instance, the safety teed device will transmit the power neces sary to feed the table against a resistanee o1 tron'i four to live tons pressure as a maximum. 'lh" vill sullice for the tooling operations. Tin cooperating safety cans,

l tliti't'lSOi its oliice during the i of the table is designed to v wrially less stresses so that may be propelled againsta resistonly about one'lourtl). or one-fifth alienonentioned, say of one ton, sary for shock-absorbing purpoi yieldable flir momentum. 01' inertiaof the parts. The

in turn permai ently n'icshes h ict ion means in handling the gea H which in this cnil'uiuliinent consti Lit-"3S a terminal member oi. the teed mechanism.

Th t is lo say, the gear H" has .1 may be connectediinal-inoniljier 10, when. and there y canse the nuts l at the :iypropi'iate of at the qui kravas the meinlwri-z (Z wl changes to be male, educes t vo other nnu- ,x -i ti a... 4,. i with .nse e in introduces two n .ial relation, it will there hat four tunes two iunio 1. cell 'El i Y be ti to use a comparatively free-acting.

.two, or sixteen different changes of feed are rendered available. The means whereby the above-mentioned clutches or their shiftable elements may both be moved manually asmay now briefly be explained. Referring to l ig. 1, D indicates one of the: hand-levers fthat extends forwardly from one side ofthe housing C for the change-gears and terminates in a handgrasp located adjacent the front longitudinal edge of the table so as to be immediately accessible to the attendant when standing at his most effective Operative station. The shank of this, hand-lever extends through a guide plate 51 that thehousing C and it is pivoted at. 59 to rock sleeve 54. that enters the gearcase and t'erminates in a shoe 57 whereby the gear :jnnit .65 .may be shifted laterally by swingfling lever up and down when it is in proper 'iosition. The end 52 of the lever I B terminates in teeth which mesh with rock like teeth in the plunger til which extends loosely through the bore of the sleeve iii. .The purpose of this is to enable the plun- (31 to be moved in an axial direction by swinging thele'ver D in. its horizontal plane. The said movement of the plunger (31 is utilized to rock a lever 66 about a horizontal. plane so as to swing the shoe 67 and thereby shift the gear unit (1". This con struetion is in all respects identical with. thatfully relatedand described in our co pending application, Serial #850175, filed July. 10th,, 1914-, and therefore need not here be elaborated, lt will be noted that thisconstruction brings the lever 1) into, the positionoiutnrost convenience a there described and it may who be noted that the lever ll is enabled to operate the sleeve 10 and the inotion-revcrser J by mecl'ianiz m and connections identical with that alw tlfully detailed in the said (so-pending ca. and which therefore need not here be ree .,la.l'ioratcd.

Having thus revealed this invention, we claim asnew and desire to secure by Letters "Patent of the United States: 1. A machinetool C(lll'll'll'llllg a spindle; a table positioned tliercunder adapted to translate transversely to said spindle; fr-a1iic-itlnits for menutine; said spindle and table in said relation, 1d providi .2; a relatiro adjaigtnierit 'betweei'i said lul l0 and vspindle in a direction parallel with the axis ihm at a rate directly proportional to the extends laterally from "J ll. 8

liming L also the weight i.

is being th Sup irzim e-iinits iinsunits ii 11 is d trams-units and adjacent frame-unit hand-operative pair-'5 last-mentioned sleission connecting said 11gb mechanism with said spindle id table 11m be pi-opslled at 2i n i -ed mutually by said spindle it ,nd adapted to propel said table (it IZU'GISG i'afie independently of said e mechanism.

ie-tool oi'gunimtimi combinmeans for rotating said spinite; 1i table; a feed-change a inotion-i'evei'ser between spindle; a fiist transmissaid spindle. and said table 1 tinge transmission and 1 I a second 'Clfill'lSmlESlO-Il 1 independently of said spinsz isd to said filSi] tirmisniisid motion lQVQl'SGl and said and shunting ,nism to impart a quickd sable at a rate indpendeni;

e; ieedrclmn a mechanism; and ame 05 available iilRIlSflllS- able g moaioii lllClGlJBKlflQi ly oi. sand "Cu disconnect said second 1:. "to establish :1 mechanical Ween said spindle and sai; 51 st transmission Whereise said sable t-u feed at a rate unlined 03* said feed-change mechanism. in w less WlliHQ'O'f, We liei'eun'io subscribe our names as attested by the twosubscribiiig Witnesses.

EQBERT T. HAZELTON. SOL EINSTEIN. Witnesses CARY, his.

1-1126 11%, nzmism; a shifting

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