CA1076787B - Machine tool - Google Patents
Machine toolInfo
- Publication number
- CA1076787B CA1076787B CA333,583A CA333583A CA1076787B CA 1076787 B CA1076787 B CA 1076787B CA 333583 A CA333583 A CA 333583A CA 1076787 B CA1076787 B CA 1076787B
- Authority
- CA
- Canada
- Prior art keywords
- tool
- axis
- carrier
- tool support
- support
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B3/00—General-purpose turning-machines or devices, e.g. centre lathes with feed rod and lead screw; Sets of turning-machines
- B23B3/16—Turret lathes for turning individually-chucked workpieces
- B23B3/161—Turret lathes for turning individually-chucked workpieces lathe with one toolslide carrying one turret head
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Turning (AREA)
Abstract
Abstract of the Disclosure There is disclosed a machine tool having improved working characteristics with lack of lost motion during operation.
Description
~1~76787 ,.~ , . . . . . .
- '' -'' . .,,i ~ .,.: , The present invention i8 directed to an improved machine tool of the type disclosed in Canadian Patent No. 505,S22. In the type of machine tool disclosed in that patent, a tool supporting turret is supported from the headstocX of the machine to extend longitudinally along a workpiece chucked on a rotatable spindle.
The turret is indexible about an axis parallel to the spindle axis to index tools on different faces thereof in workinq relat~on3hip with the workplece supported in the spindle and i8 movable ilxially i ` "i of its axi~ of rotation to move a tool through a work stroke.
10In the machine of the aforesaid patent, the tools on the i,~ .. . , . , ., " ., ., ~ ,, .. , , , . -, ., ., -turret are mounted different distance3 from the support~ng surface to properly position the tool relative to the spindle axls to es- ~ ~
tablish the proper chining relationshlp between the tool and the ~ -; . I workp~ece. When a turning tool is working ad~acent the Aplndle ~ -. ax s, the support for the tool i8 a relatively long cantilevered ; 1 6upport and must be constructed to provide the necessary rigldity.
- The tool must al-o be remounted If the depth o cut or i ~ I working position of the tool relative to the workpiece i8 to be changed. This im-ans that machine down time i8 increased if there - ~ -is to ~e such a change. Moreover, this r-quires resettlng~tools a~ to machine workpieces of the same configuration but of different siz~
In addition to the foregoing, construction of the macblne ` ~ -1 : of the patent is such that the tools ve through the same stroke r~ regardless of the lenqth of cut so that lost machine time will occur when tbe tools on the different surfaces of the tool turret reguire different worX strokes. This also requires the tools to be mounted with their working edges in different po6itions rela-~ tive to the axial length of the turret to position the tool to ': I .
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According to another aspect of the invention there is provided a machine tool comprising a frame, a rotatable member having an axis of rotation and having an outer end for supporting a workpiece to machine for rotation with said member about said axis, an indexible tool support displaced to one side of said axis and comprising means for mounting, turning and end-working tools on said tool support in each of a plurality of angular positions about an indexing axis parallel to said axis of rotation and at different locations, displaced axially along said tool support, said tool support to be movable along a first axis parallel to said axis of rotation in an advance movement relative to said frame to effect a work stroke for machining said workpiece and for return movement along said first axis to a retracted position and for .., movement along a second axis orthogonally related to said first axis to move said tool support toward and away from said axis of rotation, a carrier for 1 supporting said tool support, means mounting said carrier on said frame along--:1 side said rotatable member for movement along one of said first and second : axes, means mounting said tool support on said carrier for movement relative ,1 .
I to said carrier along the other of said first and second axes, said tool sup-port projecting outwardly of said carrier in a direction away from the outer :~ end of said rotatable member and parallel to said axis of rotation to said ~1 retracted position and movable along said other axis toward said rotatable member from said retracted position to a maximum advanced position, which positions define the maximum work stroke of said tool support, and power :1 driven means for moving said tool support along said first and second axes . and for indexing the latter.
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107~787 According to yet another aspect of the invention, there is provided in a machine tool, an assembly comprising an indexible tool supporting member having an indexing axis and being supported for movement through a maximum work stroke, said tool supporting member having means for supporting tools in a plurality of positions angularly displaced about said axis including in each angular position means for mounting a turning tool in a first position on said member with its working edge in a plane extending transversely of the indexing axis for machining for substantially the entire length of the maximum work stroke and for mounting an end-working tool in a second position displaced axially from the first position approximately the length of said maximum work stroke with the tool extending parallel to said indexing axis and its working end in said plane whereby said end-working too~ may machine substantially the ~: entire work stroke, means for supporting said tool supporting member for move-ment along a first line to move the member axially of its axis to effect said work stroke and for movement along a second line orthogonally related to said first line comprising a carrier having ways thereon for co-operating with ways on a machine tool bed to support said carrier for movement along said second line and means mounting said tool supporting member on said carrier for index-~,.. ;1 ing movement about said indexing axis and supporting said tool supporting ; 20 member on said carrier for movement along the other of said lines and power ~ drive means for moving said carrier along said second line of movement, for ~ indexing sald turret, and for moving said tool supporting member along said first line through various length work strokes including said maximum work stroke.
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,' , - 10767~7 Further provisions and advantage~ of the present inven-t ion will be apparent to those skllled in the art to which Lt re-lates from the following detailed description thereof made with reference to the accompanying drawings forming a part of thia spe-cification and in which:
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Fig. 1 is a schematic top elevational view of a machine tool embodying the present invention;
Fig. 2 is a schematic side elevatLonal view of the machine tooi of Fig. 1, loo}ting at the machine tool as indicated , . , . ,, .. ~
by the line 2-2~ ~
Fig. 3 is a schematic view of the maching tool of Fig. 1, looking at the maohine tool of Fig. 2 a~ indicated by line 3-3; ~ -- Fig. 4 is a schematic representation of the machine tool embodying the present invention and illustrating controls therefor;
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Fig. S is a graphic illustratlon showing the improved efficiency of the machine tool of the present invention.
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The present invention provides an improved mach m e tool ~ , of the type which has a rotatable workpiece spindle and a tool-:
20 carrying turret offset to one side of the spindle axis and which , is indexible about an axis parallel to the spindle axis and mov- -able longitudinally of its axis of indexing. ~rhe present inven-tion may be embodied in various forms of such machine tools but is shown in Fig. l, by way of example, as being applied to a machine , , . ~ , tool 10. The machine tool 10 includes a rotatable spindle 11 , (Fig. 4) supported in the headstock of the machine. ~he spindle ~ 11 has a wor!tpiece gripping chuc'~ lla associat~d with it and of - a conventional construction. The chuck lla rotates with the :.
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spindle 11 and is operable to grip a workpiece to be machined, a8 i8 well known. ~ -The machine tool lo also includes a turret 12. The turret 12 has a plurality of tool-supporting surfaces 12a thereon and tools, shown by way of example at 13 and 14, are carried on tool-supporting surfaces of the turret. The tools carried by the tur- -- ret are electivoly movable to a po~Ition for working on a work~
piece in the spIndle by rotational 1ndexing~ movement of the tus-set about an axis of rotation which extends parallel to the spindle 0 axis.
The tooI~upporting surSaces 12a on the turret 12 lIe io ~, planes which extend parallel to the axis of indexing movement o I , the turret ànd, likewisè, lie In planes which when in working posi-tion extend parallel to the axis of rotation of the spinalo 11.
The tool supporting susfaces lia are adapted to receive tool 8Up- ; . .
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Z ports which ase secured to the surfaces 12a by means of bolts.
A machine tool bed Z0 has at on- end a headstocX Domprls~
, - -ing the spindle hou~ing 21 for the rotatable spindle and the vari-Z ous element~ for effecting rotation of the spindle 11. me spin~
20 dle lI i- rotated by any suita le conventionaI ariv~ arrâ ge nt;
29 (see Pig. 4). The afore-mentioned patent discloses a specific ~ ~
drive for effécting rotation of the spinale 11, and such disclo- ~ .
ure is incorporated herein by reference. ~ , . . .
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The machine tool bed 20 has a pair of ways 30, 31 formed ~
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therein which extend transversely of the axis of rotation of the spindle. The way 30 is located near the left end of the machine tool bed and the way 31 is located near the right end thereof, as illustrated in Fig. 1 of~ the drawings, adjacent the oùter end of the spindle. Both of the ways extend transversely to the spindle ' , ~5~
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axis and the ways 30, 31 lie in a horizontal plane located beneath the axis Oe rotation of the spindle and extend rearwardly of the machine f~ m alongside of the spindle housing.
A turret carrier 40 i8 carried by the ways 30, 31 and i5 movable along the ways transversely of the spindle axir~ in a di-: . . . . .. ..
rection toward and away from the axis of rotation of the spindle.
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~he carrier 40 supports the turret 12 thereon and specifically :
supports a turret bar 41 which carries the turret on the outer . ; . . . ~ , . . ; ........ ,. ~ . - . - . . , end thereof. The turret 12 extends beyond the bed and the turret . . : ,. .. ..
bar 41 extends from the turret 12 into cooperative engagement with . .: ~ . '.
the carrier 40. The carrier 40 has suitable bearing support means ~
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45, 46 thereon for supporting the turret bar 41 for movement rela-tive to the carrier 40. ~
The bearing support means 45, 46 comprise housing support . ~ . , portions located at the opposite ends of the carrier 40. ~he bear-. . ' ~ .:
ing support means 45, 46 support the turret bar 41 for movement in . . . . ~ .
a longitudinal ~irection as indicated by the arrow 50 in Fig. 2, ~
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and which direction is parallel to the axis of rotation of the : , - -. . . ,. ~ .......................... , , spindle 11. In addition, the bearing support mean~ 45, 46 support : : :,: , . , , the turret bar for rotational indexing movement about its axis 51. ~
:, ~ ~ , ,.,p~QSC~7~'S ~, ' '' '.' ' -''; ' ' ~ J~L Rotation of the turret about the axis 51 ~N~esent different tools -: ,,, , , . , ......... . ~ , ~ " . . : :
carried on the various tool-supporting surfaces 12a of the turret . , ,. , ...... .. : ~ . ,~ . : . - . .: - - .
into position for working on the workpiece. Movement of the tur-ret in the direction of the arrow 50 longitudinally of the axis of rotation 51 causes the turret to move along the workpiece to -;,: . . , ~ , , . .................. ,~., . : .
- effect a machining of the workpiece. ; - .
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~ Various mechanisms may be utilized for eff2cting rotation-. . -. - .
- al indexing movement of the turret about the axis 51, and in ad-. : .
dition, various mechanisms may be utilized for effecting ~, . . . . .
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longitudinal movement of the turret ~ong its axis in the directlon of the arrow 50. The drawings illustrate schematically a mecha- - ;
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nism 60 for effecting the longitudinal movement of the turret 12 along its axis in the direction of the arrow 50.
., , -: .: ' ' The mechanism 60 i9 operable toeffect a variable amount of .. .. ,, movement of the turret 12 along its axis of rotation in the direc-. : . - ,.
tion of the arrow 50. The mechanism 60 comprises a lead screw-and-nut arrangement operatively associated with the turret bar 41 -toeffect vement of the turret bar 41 along its axis of index~
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lng movement. More specifically, a ball nut member 61 is mounted on the turret bar 41 and held thereon against axial movement along the turret bar 41. Suitable collars 41a hold the nut member 61 from axial movement. The turret bar 41, however, i8 rotatable .~ , . - .. ..
within the ball nut. A lead screw 62 cooperates with the nut and .-~ .
extends therethrough and upon rotation thereof effects movement of the nut 61 and turret bar il in the direction of the arrow 50. -., , : , - - . .. ' ,: . .~ ' This is used to effect machining movement of the turret 12 in ;~ the dirèction of the arrOw 50. As shown in Fig. 4, the lead screw - is rotated by a suitable motor 63. ~ --, 20 In addition, a suitable motor and drive, designated 70 in - -~
Fig. 4, is associated with the turret bar 41 to effect rotational movement of the turret bar about its axis 51 upon energization of the motor. The motor and drlve may be one of many ~uitable con~
- ventional types ~o as to effect the proper indexing movement of - the turret bar upon energizatlon thereof. The turret bar 41 ro- -tates within the nut 61 during its indexing operation.
Moreover, a suitable drive mechanism is utilized for driv-ing the carrier 40 toward and away from the axis of rotation of the spindle along ways 30, 31. Fig. 4 illustrates a conventional :-.
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107678'7 .1 screw 71 driven by a motor 72 ~or thi~ purpose. The lead ~crew 71 cooperates w~ h a ball nut structure carrled by the carrler 40 and can be operated to move the carrier 40 at rapid traver~e or feed speeds.
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As shown in Fig. 4, the motor3 63, 72 are ~chematically -~t , depicted. It should be apparent, of course, that since the carrier 40 moves transverse to the spindle axls, the motor 63 and turret indexing drive must either be mounted completely on the carrier 40, ;
~i or provision must be made for the movement. Such provision in the . . , , , . ' ..
10 drive for the screw 62 could comprise a relatively slidiible drive -connection therein which permits transver-e-movement o~ the tur~ot and screw 62 without breaking the drive to the motor 63. Similarly, while the~turret indexing drive is preSerably of tho type di-closed in the aforesaid patent, an arrangement may be in the turret drive , - ~ . ?
where a slidable drive cpnnection couid permit longitudinal move- - .
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ment of th~ bar 41Jw-i~i~ breaking the rotary drive to the bar 41.
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Such connection has not been shown, since such arrangements are ~
within the domain o~ the skill of the art. ~ I
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As shown in Fig. 4, the operation of the various dr1ves in o rder to control the movement o~ the turret and rotation of the spindle is under the control o~ a numerical control system, gene-. : ~ l - rally designated 80 in Fig. 4. A tape reader Bl is associated i~ - l ., , . : - . , with the numerical control system 80 and, in a conventional manner, a tape directs command signals to the numerical control system so ~ -~
as to effect a control of the operation of the motors 63, 72 and . . ~ . . . . . . . .
the spindle drive 29 and turret indexing drive 70. Through the :' l operation of the tape rsader 81 and the numerical control system ,: . . , ~ . :
80, movement of the turret along its axis for machining operations, ' .~ . ., . ., . , i '' : ~ . . .t i -8-. , ~
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movement of the turret toward and away from the spindle through . the energi~iation of the motor 72, and turret indexing i8 controlled.
As is conventional in numerical control systems, a signal is returned to the numerical control system to indicate the posi-tion or movement of the machine tool elements so that the control -; . , , . .
will Xnow when the elements have moved to the position commanded ;
by the numerical control system. In this connection, a suitable -siqnal means 85, such as an incremental pulse generator or a posi- ~ ~`
tion encoder, depending on the specific control system, is asso-10 ciated with the lead screw 71 and returns a sfignal to the numerical `
control system 80 to indicate that the carrier 40 has been moved to ~ -~
the desired position commanded by the numerical control system.
~-~ Likewise, a suitable signal means 86, such as an incremental pulse ~
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generator or position encoder depending on the specific control system, i8 associated with the lead screw 62 to indicate that the turret has been moved longitudinally to the position commanded by ~
the numerical control system. ~,ikewise, a suitable command signal -is transmitted from the numerical control system to the tape reader -to index the tape reader at the appropriate time, as ia Xnown.
~- 20 ~In the preferred embodiment of the pr-sent machine, th-- bearing means 45, 46 is supported for movem-nt ~ward and away from the spindle axls by bearing meansf in the form of ways 30, 31 to move the turret toward and away from, the spindle axis. Since the tur-ret 12 is movable toward and away from the spindle axis, the depth of cut or position of the tool may be readily changed by moving the turret transversely of the axis rather than by remounting the entire tool. In addition, a tool on the turret may be used for operations -~
such as facing and grooving. 'rhis greatly decreases down time c when the worXing position of the tool is to be changed to a new J
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diameter, or because of other Pactors such as tool wear. Also, the tool may be mounted close to its supporting surface, even though working close to the axis provided, the maximum diameter of the workpiece does not cau~e interference problems. When the movements of the turret are numerically controlled, the depth of cut or tool position can be readily controlled from the program and change can be readily made without 108Ej of machine time. In the absence of numerical control, the operator need merely effect the de3ired positioning with conventional type operator-actuated 10 control3. ~ ~ ~
It should be apparent from the above description that the ¦
turret 12 i8 movable not only toward and away from the spindle . - . . .................. ~ . I
-axis by movement of the carrier 40, but i8 also movable along the I
spindle axis in a machining operation in a variable length machin- ¦
ing stro7ce. As a result, the tools carried on the surfaces 12a, which extend parallel to the spindle axis, may be positioned 90 that their cutting edges lie in a common plane, even though the . , .~ I
tools are to have different work strokes.
In the preferred and illustratèd embodiMent, the tool tur-ret 12 is provided with bolt holes 12b at each end of the turretfor receiving bolts for mounting and rigidly ~ec ring tool holders for supporting tools in posltion to work on the workpiece. By ~ -providing different positions along the axial length of the tur-- ret 12 to mount the toolholders, the tools can be mounted with their working edges in a co~mon plane which is perpendicular to the axis of the spindle, even though one tool is, for example, a drilling tool and another tool an external tool. Since the tur-ret has a variable work stroke from the indexing position, the , tools can be supported, from a machinlng standpoint, w1th their , . ' ` ~ -' ' : . ' .
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i ' working edges in a common plane, to provide a machine in which ; ~, machining efficiency i3 increased. Where the tool turret i8 mov-able through a fixed stroke, it is necessary to position the tools along the turret to cause the tools to effect the proper machining stroke when the turret is moved through its fixed stroke. Since the turret in the described application has a variable work stroke, the tools can be mounted with their cutting edges in substantially ~ ~ -a common plane. Moreover, since the machining stroke of the tool - ;
is no longer governed by the work stroke of the turret, it is not 10 necessary to provide dovetail ways so that th- tool holder can be ~ ~
adjusted throughout the length of the turret. Only suSficient ~ ~ - -positions need be provided so that the support short tools need not 'oe bu~t up to position the cutting édges of the tools in a ;~
substantialiy 0mmon plane. The use of bolts and threaded holes in the turret instead of ways great;y facil~tat~ the mounting of ~ ' .
a tool holder to the turret in a rid~g manner. The described con-struction minimizes lost time during indexing and also greatly ~ , simplifies s-t-up of the tools, lnc- the;op-rator alw-ys knows the proper position for the working edges of the tool and simpli- , fies~programmi~ng numerical~control, sinc- the programmer may - alw-ys operate on the assumption that the tool wlll be ln one plane.
~ he increased efficiency from the above-described features ~ ~ -is best understood upon referenc- to an example, as illustrated in Pig. 5, and a~comparison of the prior art with the present inven-tion.~ In the example of Fig. 5, an internai working tool, such as a drill 13, has a relatively long cutting length "a" and is mount- t~ -ed on one turret tool-supporting surface and a turning tool 14, having a shorter cutting length "b" is mounted on another tool-supporting surface.
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.:, 107~787 As shown schematically in Figure 5 and assuming that the drill is operating first, in the prior art machine the drill 13 would move thTough its fixed length work stroke from the fixed turret indexing position a distance as indicated by the arrow 92 in Figure 5A. During this movement, the drill would perform its work operation from the distance "a" on the workpiece W.
The turret then returns to its fixed indexing position at which the indexing movement of the turret occurs to position the tools for machining.
The turret then moves through its fixed machining stroke, as in-dicated by the arrow 93 in Figure 5B, effecting movement of the tool 14 through that distance. However, since the tool 14 is to perform a machining operation on the workpiece through only the distance "b", the tool 14 must be located on the turret, as shown in Figure 5B, in effect behind the cùtting edge of the tool 13 in Figure 5A which works the entire fixed work stroke.
As a result, as the tool 14 moves toward the workpiece, machine cycle time is lost, as shown in Figure 5B, because of the turret's movement which must - occur as indicated by line X (Figure 5B~ without the tool 14 working on the workpiece. This lost time occurs because the turret has a fixed length machining stroke, as indicated by the fact that arrows 92, 93 are of equal length.
As opposed to the operation of the machine tool of the prior art, which is illustrated in Figures 5A, 5B, the machine tool of the present invention eliminates the lost machine cycle in the example illustrated in Figure 5B. As illustrated in Figures 5C and 5D, the tools are mounted with the working edges of the tools in the same plane transversely of the spindle axis. The operation of the drill 13, for purposes of simplicity only, is substantially .: - : . , . . . .
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i the same as the drill in Fig. 5A. Accordingly, under the control ., of the numerical control ystem 80 and the tape reader 81, the motor 63 is energized in order to effect movement of the turret 12 along its axis of indexing movement 51 through the stroke in-dicated by the arrow 94 in Fig. 5C. During this movement, the . drill will operate to drill a hole in the wor~piece for the dis-:'~ t tance, designated "a" in Fig. 5C. Once the drill has moved through the distance "a", the signals from the signal means 86 will indicate to the numerical control system 80 that the drill has moved to the position commanded and further movement of the ¦ turret 12 will stop. The drill will then reverse and return to a position clear of the workpiece and the turret indexed. When the turret has been indexed, the numerical control system will again .
trigger operation of the motor 63 to effect movement of the turret so that the cutting tool 14 will move into engagement with the workpiece and perform a turning operatioh on the workpiece for the - distance "b". When the tool 14 has performed the work for the - distance "b", the signals from signal means 86 will indicate this ; ¦ and the motor 63 w111 be reversed and further machining movement 20 of the turret will cease. The turret will again be returned to a -po-ition for indexiDg. It shou1d be apparent that in the operation -of the machine tool, as depicted in Figs. 5C and D, the lost machin-¦ ~ ~ ing time, which is shown in Fig. 5B, has been eliminated.
From the foregolng, it can be seen that a new and improved ¦ machine tool has been provided in which an indexible tool turret, I
-~ ¦ which is indexible about an axis parallel to the axis of a spindle, ; ¦ for chucking a workpiece has tool-supporting surfaces extending ~. I
longitudinally of its axis of rotation to allow tools to be mount- ' ¦ ed at variOUS positions along the spindle axis. the machine I . ., . ._._.. ,_ ,. . ... _.. :.
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107f~,7~7 . construction being such that the turret is supported for movement transversely of the spindle axis in a manner which does not inter-fere with operator acces~ to the spindle or to the turret and . the turret being controlled so that it has a variable stro~e .~ ; thereby minimizing set-up time, loss of machining time, and in-.
. creasing the efficiency and accuracy of the machine tool. ~' _ ;~' . - . "' '`. ` ' '' ' . .' : ` ~ . .' . .
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- '' -'' . .,,i ~ .,.: , The present invention i8 directed to an improved machine tool of the type disclosed in Canadian Patent No. 505,S22. In the type of machine tool disclosed in that patent, a tool supporting turret is supported from the headstocX of the machine to extend longitudinally along a workpiece chucked on a rotatable spindle.
The turret is indexible about an axis parallel to the spindle axis to index tools on different faces thereof in workinq relat~on3hip with the workplece supported in the spindle and i8 movable ilxially i ` "i of its axi~ of rotation to move a tool through a work stroke.
10In the machine of the aforesaid patent, the tools on the i,~ .. . , . , ., " ., ., ~ ,, .. , , , . -, ., ., -turret are mounted different distance3 from the support~ng surface to properly position the tool relative to the spindle axls to es- ~ ~
tablish the proper chining relationshlp between the tool and the ~ -; . I workp~ece. When a turning tool is working ad~acent the Aplndle ~ -. ax s, the support for the tool i8 a relatively long cantilevered ; 1 6upport and must be constructed to provide the necessary rigldity.
- The tool must al-o be remounted If the depth o cut or i ~ I working position of the tool relative to the workpiece i8 to be changed. This im-ans that machine down time i8 increased if there - ~ -is to ~e such a change. Moreover, this r-quires resettlng~tools a~ to machine workpieces of the same configuration but of different siz~
In addition to the foregoing, construction of the macblne ` ~ -1 : of the patent is such that the tools ve through the same stroke r~ regardless of the lenqth of cut so that lost machine time will occur when tbe tools on the different surfaces of the tool turret reguire different worX strokes. This also requires the tools to be mounted with their working edges in different po6itions rela-~ tive to the axial length of the turret to position the tool to ': I .
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According to another aspect of the invention there is provided a machine tool comprising a frame, a rotatable member having an axis of rotation and having an outer end for supporting a workpiece to machine for rotation with said member about said axis, an indexible tool support displaced to one side of said axis and comprising means for mounting, turning and end-working tools on said tool support in each of a plurality of angular positions about an indexing axis parallel to said axis of rotation and at different locations, displaced axially along said tool support, said tool support to be movable along a first axis parallel to said axis of rotation in an advance movement relative to said frame to effect a work stroke for machining said workpiece and for return movement along said first axis to a retracted position and for .., movement along a second axis orthogonally related to said first axis to move said tool support toward and away from said axis of rotation, a carrier for 1 supporting said tool support, means mounting said carrier on said frame along--:1 side said rotatable member for movement along one of said first and second : axes, means mounting said tool support on said carrier for movement relative ,1 .
I to said carrier along the other of said first and second axes, said tool sup-port projecting outwardly of said carrier in a direction away from the outer :~ end of said rotatable member and parallel to said axis of rotation to said ~1 retracted position and movable along said other axis toward said rotatable member from said retracted position to a maximum advanced position, which positions define the maximum work stroke of said tool support, and power :1 driven means for moving said tool support along said first and second axes . and for indexing the latter.
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107~787 According to yet another aspect of the invention, there is provided in a machine tool, an assembly comprising an indexible tool supporting member having an indexing axis and being supported for movement through a maximum work stroke, said tool supporting member having means for supporting tools in a plurality of positions angularly displaced about said axis including in each angular position means for mounting a turning tool in a first position on said member with its working edge in a plane extending transversely of the indexing axis for machining for substantially the entire length of the maximum work stroke and for mounting an end-working tool in a second position displaced axially from the first position approximately the length of said maximum work stroke with the tool extending parallel to said indexing axis and its working end in said plane whereby said end-working too~ may machine substantially the ~: entire work stroke, means for supporting said tool supporting member for move-ment along a first line to move the member axially of its axis to effect said work stroke and for movement along a second line orthogonally related to said first line comprising a carrier having ways thereon for co-operating with ways on a machine tool bed to support said carrier for movement along said second line and means mounting said tool supporting member on said carrier for index-~,.. ;1 ing movement about said indexing axis and supporting said tool supporting ; 20 member on said carrier for movement along the other of said lines and power ~ drive means for moving said carrier along said second line of movement, for ~ indexing sald turret, and for moving said tool supporting member along said first line through various length work strokes including said maximum work stroke.
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,' , - 10767~7 Further provisions and advantage~ of the present inven-t ion will be apparent to those skllled in the art to which Lt re-lates from the following detailed description thereof made with reference to the accompanying drawings forming a part of thia spe-cification and in which:
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Fig. 1 is a schematic top elevational view of a machine tool embodying the present invention;
Fig. 2 is a schematic side elevatLonal view of the machine tooi of Fig. 1, loo}ting at the machine tool as indicated , . , . ,, .. ~
by the line 2-2~ ~
Fig. 3 is a schematic view of the maching tool of Fig. 1, looking at the maohine tool of Fig. 2 a~ indicated by line 3-3; ~ -- Fig. 4 is a schematic representation of the machine tool embodying the present invention and illustrating controls therefor;
and ~ ~ ;
Fig. S is a graphic illustratlon showing the improved efficiency of the machine tool of the present invention.
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The present invention provides an improved mach m e tool ~ , of the type which has a rotatable workpiece spindle and a tool-:
20 carrying turret offset to one side of the spindle axis and which , is indexible about an axis parallel to the spindle axis and mov- -able longitudinally of its axis of indexing. ~rhe present inven-tion may be embodied in various forms of such machine tools but is shown in Fig. l, by way of example, as being applied to a machine , , . ~ , tool 10. The machine tool 10 includes a rotatable spindle 11 , (Fig. 4) supported in the headstock of the machine. ~he spindle ~ 11 has a wor!tpiece gripping chuc'~ lla associat~d with it and of - a conventional construction. The chuck lla rotates with the :.
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spindle 11 and is operable to grip a workpiece to be machined, a8 i8 well known. ~ -The machine tool lo also includes a turret 12. The turret 12 has a plurality of tool-supporting surfaces 12a thereon and tools, shown by way of example at 13 and 14, are carried on tool-supporting surfaces of the turret. The tools carried by the tur- -- ret are electivoly movable to a po~Ition for working on a work~
piece in the spIndle by rotational 1ndexing~ movement of the tus-set about an axis of rotation which extends parallel to the spindle 0 axis.
The tooI~upporting surSaces 12a on the turret 12 lIe io ~, planes which extend parallel to the axis of indexing movement o I , the turret ànd, likewisè, lie In planes which when in working posi-tion extend parallel to the axis of rotation of the spinalo 11.
The tool supporting susfaces lia are adapted to receive tool 8Up- ; . .
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Z ports which ase secured to the surfaces 12a by means of bolts.
A machine tool bed Z0 has at on- end a headstocX Domprls~
, - -ing the spindle hou~ing 21 for the rotatable spindle and the vari-Z ous element~ for effecting rotation of the spindle 11. me spin~
20 dle lI i- rotated by any suita le conventionaI ariv~ arrâ ge nt;
29 (see Pig. 4). The afore-mentioned patent discloses a specific ~ ~
drive for effécting rotation of the spinale 11, and such disclo- ~ .
ure is incorporated herein by reference. ~ , . . .
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The machine tool bed 20 has a pair of ways 30, 31 formed ~
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therein which extend transversely of the axis of rotation of the spindle. The way 30 is located near the left end of the machine tool bed and the way 31 is located near the right end thereof, as illustrated in Fig. 1 of~ the drawings, adjacent the oùter end of the spindle. Both of the ways extend transversely to the spindle ' , ~5~
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axis and the ways 30, 31 lie in a horizontal plane located beneath the axis Oe rotation of the spindle and extend rearwardly of the machine f~ m alongside of the spindle housing.
A turret carrier 40 i8 carried by the ways 30, 31 and i5 movable along the ways transversely of the spindle axir~ in a di-: . . . . .. ..
rection toward and away from the axis of rotation of the spindle.
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~he carrier 40 supports the turret 12 thereon and specifically :
supports a turret bar 41 which carries the turret on the outer . ; . . . ~ , . . ; ........ ,. ~ . - . - . . , end thereof. The turret 12 extends beyond the bed and the turret . . : ,. .. ..
bar 41 extends from the turret 12 into cooperative engagement with . .: ~ . '.
the carrier 40. The carrier 40 has suitable bearing support means ~
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45, 46 thereon for supporting the turret bar 41 for movement rela-tive to the carrier 40. ~
The bearing support means 45, 46 comprise housing support . ~ . , portions located at the opposite ends of the carrier 40. ~he bear-. . ' ~ .:
ing support means 45, 46 support the turret bar 41 for movement in . . . . ~ .
a longitudinal ~irection as indicated by the arrow 50 in Fig. 2, ~
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and which direction is parallel to the axis of rotation of the : , - -. . . ,. ~ .......................... , , spindle 11. In addition, the bearing support mean~ 45, 46 support : : :,: , . , , the turret bar for rotational indexing movement about its axis 51. ~
:, ~ ~ , ,.,p~QSC~7~'S ~, ' '' '.' ' -''; ' ' ~ J~L Rotation of the turret about the axis 51 ~N~esent different tools -: ,,, , , . , ......... . ~ , ~ " . . : :
carried on the various tool-supporting surfaces 12a of the turret . , ,. , ...... .. : ~ . ,~ . : . - . .: - - .
into position for working on the workpiece. Movement of the tur-ret in the direction of the arrow 50 longitudinally of the axis of rotation 51 causes the turret to move along the workpiece to -;,: . . , ~ , , . .................. ,~., . : .
- effect a machining of the workpiece. ; - .
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~ Various mechanisms may be utilized for eff2cting rotation-. . -. - .
- al indexing movement of the turret about the axis 51, and in ad-. : .
dition, various mechanisms may be utilized for effecting ~, . . . . .
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longitudinal movement of the turret ~ong its axis in the directlon of the arrow 50. The drawings illustrate schematically a mecha- - ;
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nism 60 for effecting the longitudinal movement of the turret 12 along its axis in the direction of the arrow 50.
., , -: .: ' ' The mechanism 60 i9 operable toeffect a variable amount of .. .. ,, movement of the turret 12 along its axis of rotation in the direc-. : . - ,.
tion of the arrow 50. The mechanism 60 comprises a lead screw-and-nut arrangement operatively associated with the turret bar 41 -toeffect vement of the turret bar 41 along its axis of index~
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lng movement. More specifically, a ball nut member 61 is mounted on the turret bar 41 and held thereon against axial movement along the turret bar 41. Suitable collars 41a hold the nut member 61 from axial movement. The turret bar 41, however, i8 rotatable .~ , . - .. ..
within the ball nut. A lead screw 62 cooperates with the nut and .-~ .
extends therethrough and upon rotation thereof effects movement of the nut 61 and turret bar il in the direction of the arrow 50. -., , : , - - . .. ' ,: . .~ ' This is used to effect machining movement of the turret 12 in ;~ the dirèction of the arrOw 50. As shown in Fig. 4, the lead screw - is rotated by a suitable motor 63. ~ --, 20 In addition, a suitable motor and drive, designated 70 in - -~
Fig. 4, is associated with the turret bar 41 to effect rotational movement of the turret bar about its axis 51 upon energization of the motor. The motor and drlve may be one of many ~uitable con~
- ventional types ~o as to effect the proper indexing movement of - the turret bar upon energizatlon thereof. The turret bar 41 ro- -tates within the nut 61 during its indexing operation.
Moreover, a suitable drive mechanism is utilized for driv-ing the carrier 40 toward and away from the axis of rotation of the spindle along ways 30, 31. Fig. 4 illustrates a conventional :-.
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107678'7 .1 screw 71 driven by a motor 72 ~or thi~ purpose. The lead ~crew 71 cooperates w~ h a ball nut structure carrled by the carrler 40 and can be operated to move the carrier 40 at rapid traver~e or feed speeds.
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As shown in Fig. 4, the motor3 63, 72 are ~chematically -~t , depicted. It should be apparent, of course, that since the carrier 40 moves transverse to the spindle axls, the motor 63 and turret indexing drive must either be mounted completely on the carrier 40, ;
~i or provision must be made for the movement. Such provision in the . . , , , . ' ..
10 drive for the screw 62 could comprise a relatively slidiible drive -connection therein which permits transver-e-movement o~ the tur~ot and screw 62 without breaking the drive to the motor 63. Similarly, while the~turret indexing drive is preSerably of tho type di-closed in the aforesaid patent, an arrangement may be in the turret drive , - ~ . ?
where a slidable drive cpnnection couid permit longitudinal move- - .
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ment of th~ bar 41Jw-i~i~ breaking the rotary drive to the bar 41.
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Such connection has not been shown, since such arrangements are ~
within the domain o~ the skill of the art. ~ I
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As shown in Fig. 4, the operation of the various dr1ves in o rder to control the movement o~ the turret and rotation of the spindle is under the control o~ a numerical control system, gene-. : ~ l - rally designated 80 in Fig. 4. A tape reader Bl is associated i~ - l ., , . : - . , with the numerical control system 80 and, in a conventional manner, a tape directs command signals to the numerical control system so ~ -~
as to effect a control of the operation of the motors 63, 72 and . . ~ . . . . . . . .
the spindle drive 29 and turret indexing drive 70. Through the :' l operation of the tape rsader 81 and the numerical control system ,: . . , ~ . :
80, movement of the turret along its axis for machining operations, ' .~ . ., . ., . , i '' : ~ . . .t i -8-. , ~
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movement of the turret toward and away from the spindle through . the energi~iation of the motor 72, and turret indexing i8 controlled.
As is conventional in numerical control systems, a signal is returned to the numerical control system to indicate the posi-tion or movement of the machine tool elements so that the control -; . , , . .
will Xnow when the elements have moved to the position commanded ;
by the numerical control system. In this connection, a suitable -siqnal means 85, such as an incremental pulse generator or a posi- ~ ~`
tion encoder, depending on the specific control system, is asso-10 ciated with the lead screw 71 and returns a sfignal to the numerical `
control system 80 to indicate that the carrier 40 has been moved to ~ -~
the desired position commanded by the numerical control system.
~-~ Likewise, a suitable signal means 86, such as an incremental pulse ~
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generator or position encoder depending on the specific control system, i8 associated with the lead screw 62 to indicate that the turret has been moved longitudinally to the position commanded by ~
the numerical control system. ~,ikewise, a suitable command signal -is transmitted from the numerical control system to the tape reader -to index the tape reader at the appropriate time, as ia Xnown.
~- 20 ~In the preferred embodiment of the pr-sent machine, th-- bearing means 45, 46 is supported for movem-nt ~ward and away from the spindle axls by bearing meansf in the form of ways 30, 31 to move the turret toward and away from, the spindle axis. Since the tur-ret 12 is movable toward and away from the spindle axis, the depth of cut or position of the tool may be readily changed by moving the turret transversely of the axis rather than by remounting the entire tool. In addition, a tool on the turret may be used for operations -~
such as facing and grooving. 'rhis greatly decreases down time c when the worXing position of the tool is to be changed to a new J
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1076787 ` I
diameter, or because of other Pactors such as tool wear. Also, the tool may be mounted close to its supporting surface, even though working close to the axis provided, the maximum diameter of the workpiece does not cau~e interference problems. When the movements of the turret are numerically controlled, the depth of cut or tool position can be readily controlled from the program and change can be readily made without 108Ej of machine time. In the absence of numerical control, the operator need merely effect the de3ired positioning with conventional type operator-actuated 10 control3. ~ ~ ~
It should be apparent from the above description that the ¦
turret 12 i8 movable not only toward and away from the spindle . - . . .................. ~ . I
-axis by movement of the carrier 40, but i8 also movable along the I
spindle axis in a machining operation in a variable length machin- ¦
ing stro7ce. As a result, the tools carried on the surfaces 12a, which extend parallel to the spindle axis, may be positioned 90 that their cutting edges lie in a common plane, even though the . , .~ I
tools are to have different work strokes.
In the preferred and illustratèd embodiMent, the tool tur-ret 12 is provided with bolt holes 12b at each end of the turretfor receiving bolts for mounting and rigidly ~ec ring tool holders for supporting tools in posltion to work on the workpiece. By ~ -providing different positions along the axial length of the tur-- ret 12 to mount the toolholders, the tools can be mounted with their working edges in a co~mon plane which is perpendicular to the axis of the spindle, even though one tool is, for example, a drilling tool and another tool an external tool. Since the tur-ret has a variable work stroke from the indexing position, the , tools can be supported, from a machinlng standpoint, w1th their , . ' ` ~ -' ' : . ' .
~ l 10~6787 `~ ~
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i ' working edges in a common plane, to provide a machine in which ; ~, machining efficiency i3 increased. Where the tool turret i8 mov-able through a fixed stroke, it is necessary to position the tools along the turret to cause the tools to effect the proper machining stroke when the turret is moved through its fixed stroke. Since the turret in the described application has a variable work stroke, the tools can be mounted with their cutting edges in substantially ~ ~ -a common plane. Moreover, since the machining stroke of the tool - ;
is no longer governed by the work stroke of the turret, it is not 10 necessary to provide dovetail ways so that th- tool holder can be ~ ~
adjusted throughout the length of the turret. Only suSficient ~ ~ - -positions need be provided so that the support short tools need not 'oe bu~t up to position the cutting édges of the tools in a ;~
substantialiy 0mmon plane. The use of bolts and threaded holes in the turret instead of ways great;y facil~tat~ the mounting of ~ ' .
a tool holder to the turret in a rid~g manner. The described con-struction minimizes lost time during indexing and also greatly ~ , simplifies s-t-up of the tools, lnc- the;op-rator alw-ys knows the proper position for the working edges of the tool and simpli- , fies~programmi~ng numerical~control, sinc- the programmer may - alw-ys operate on the assumption that the tool wlll be ln one plane.
~ he increased efficiency from the above-described features ~ ~ -is best understood upon referenc- to an example, as illustrated in Pig. 5, and a~comparison of the prior art with the present inven-tion.~ In the example of Fig. 5, an internai working tool, such as a drill 13, has a relatively long cutting length "a" and is mount- t~ -ed on one turret tool-supporting surface and a turning tool 14, having a shorter cutting length "b" is mounted on another tool-supporting surface.
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.:, 107~787 As shown schematically in Figure 5 and assuming that the drill is operating first, in the prior art machine the drill 13 would move thTough its fixed length work stroke from the fixed turret indexing position a distance as indicated by the arrow 92 in Figure 5A. During this movement, the drill would perform its work operation from the distance "a" on the workpiece W.
The turret then returns to its fixed indexing position at which the indexing movement of the turret occurs to position the tools for machining.
The turret then moves through its fixed machining stroke, as in-dicated by the arrow 93 in Figure 5B, effecting movement of the tool 14 through that distance. However, since the tool 14 is to perform a machining operation on the workpiece through only the distance "b", the tool 14 must be located on the turret, as shown in Figure 5B, in effect behind the cùtting edge of the tool 13 in Figure 5A which works the entire fixed work stroke.
As a result, as the tool 14 moves toward the workpiece, machine cycle time is lost, as shown in Figure 5B, because of the turret's movement which must - occur as indicated by line X (Figure 5B~ without the tool 14 working on the workpiece. This lost time occurs because the turret has a fixed length machining stroke, as indicated by the fact that arrows 92, 93 are of equal length.
As opposed to the operation of the machine tool of the prior art, which is illustrated in Figures 5A, 5B, the machine tool of the present invention eliminates the lost machine cycle in the example illustrated in Figure 5B. As illustrated in Figures 5C and 5D, the tools are mounted with the working edges of the tools in the same plane transversely of the spindle axis. The operation of the drill 13, for purposes of simplicity only, is substantially .: - : . , . . . .
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i the same as the drill in Fig. 5A. Accordingly, under the control ., of the numerical control ystem 80 and the tape reader 81, the motor 63 is energized in order to effect movement of the turret 12 along its axis of indexing movement 51 through the stroke in-dicated by the arrow 94 in Fig. 5C. During this movement, the . drill will operate to drill a hole in the wor~piece for the dis-:'~ t tance, designated "a" in Fig. 5C. Once the drill has moved through the distance "a", the signals from the signal means 86 will indicate to the numerical control system 80 that the drill has moved to the position commanded and further movement of the ¦ turret 12 will stop. The drill will then reverse and return to a position clear of the workpiece and the turret indexed. When the turret has been indexed, the numerical control system will again .
trigger operation of the motor 63 to effect movement of the turret so that the cutting tool 14 will move into engagement with the workpiece and perform a turning operatioh on the workpiece for the - distance "b". When the tool 14 has performed the work for the - distance "b", the signals from signal means 86 will indicate this ; ¦ and the motor 63 w111 be reversed and further machining movement 20 of the turret will cease. The turret will again be returned to a -po-ition for indexiDg. It shou1d be apparent that in the operation -of the machine tool, as depicted in Figs. 5C and D, the lost machin-¦ ~ ~ ing time, which is shown in Fig. 5B, has been eliminated.
From the foregolng, it can be seen that a new and improved ¦ machine tool has been provided in which an indexible tool turret, I
-~ ¦ which is indexible about an axis parallel to the axis of a spindle, ; ¦ for chucking a workpiece has tool-supporting surfaces extending ~. I
longitudinally of its axis of rotation to allow tools to be mount- ' ¦ ed at variOUS positions along the spindle axis. the machine I . ., . ._._.. ,_ ,. . ... _.. :.
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107f~,7~7 . construction being such that the turret is supported for movement transversely of the spindle axis in a manner which does not inter-fere with operator acces~ to the spindle or to the turret and . the turret being controlled so that it has a variable stro~e .~ ; thereby minimizing set-up time, loss of machining time, and in-.
. creasing the efficiency and accuracy of the machine tool. ~' _ ;~' . - . "' '`. ` ' '' ' . .' : ` ~ . .' . .
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Claims (21)
1. A machine tool comprising a frame, a rotatable member having an axis of rotation and having an outer end for supporting a workpiece to be machined for rotation with said member about said axis, an indexible tool support dis-placed to one side of said axis and comprising means for mounting tools on said tool support in a plurality of angular positions about an indexing axis parallel to said axis of rotation, a carrier, means supporting said tool support on said carrier for indexing movement relative to said carrier to index said tools to a position for machining a workpiece and for advance move-ment relative to said carrier in a work stroke parallel to said axis of rotation to effect the machining of said workpiece and for return movement, said tool support projecting outwardly of said carrier in a direction paral-lel to said axis of rotation to a retracted position and movable toward said carrier from said retracted position to a maximum advanced position, which positions define the maximum work stroke of said tool support, means support-ing said carrier for movement toward and away from said axis to move a tool on said tool support transversely of said axis of rotation, said means sup-porting said carrier being disposed on said frame alongside said rotatable member and comprising a way extending transversely to said axis of rotation and alongside said rotatable member, and power driven means operatively con-nected to said tool support for indexing the latter and moving it through its work stroke.
2. A machine tool as defined in claim 1 wherein said means for mount-ing a plurality of tools comprises means for mounting turning and end-working tools on said tool support at each angular position and at spaced apart locations on said tool support.
3. A machine tool as defined in claim 1 wherein said tool support projects outwardly from said carrier to a position at least approximately twice the distance of the maximum work stroke of said tool support to support an end-working tool for machining the workpiece for substantially the maximum work stroke of the tool support.
4. A machine tool as defined in claim 1 wherein said tool mounting means of said tool support comprises means for mounting a turning tool with its cutting edge in a plane to machine the outer periphery of a workpiece at least at the beginning of the work stroke with the tool support in its re-tracted position and for mounting an end-working tool with its cutting edge in said plane and the end-working tool extending parallel to the axis of the rotatable member for a distance at least approximately equal to the length of the maximum work stroke of said tool support whereby said end-working tool is adapted to machine the workpiece inwardly from the outer end thereof for sub-stantially the full length of the maximum work stroke as the tool support is moved through its work stroke, and said driven means comprising means for moving said tool support relative to said carrier in a direction substantially parallel to the axis of said rotatable member in different length work strokes.
5. A machine tool as defined in claim 1 wherein said tool support com-prises a plurality of tool supporting surfaces arranged about said indexing axis and extending generally parallel to the axis of said rotation of said rotatable member, and said means for mounting a turning tool and an end-working tool on each of said surfaces mounts the tools at positions displaced from each other approximately the distance of said maximum work stroke and with the cutting edges thereof in substantially the same plane transversely of said axis of rotation.
6. A machine tool as defined in claim 4 wherein said means supporting said carrier comprises means for supporting said carrier for movement through a path projecting through said axis of rotation of said member.
7. A machine tool as defined in claim 1 wherein said way extends paral-lel to a line perpendicular to and intersecting the axis of said rotatable member and supporting said carrier for movement along a path projecting through said axis of rotation.
8. A machine tool as defined in claim 7 wherein said way is disposed inwardly of the plane of said outer end of said rotatable member.
9. A machine tool as defined in claim 4 wherein said outer end of said rotatable member is disposed adjacent one side of said frame and said tool support projects outwardly from said carrier outwardly of said one side of said frame.
10. A machine tool as defined in claim 1 wherein said outer end of said rotatable member is disposed adjacent one site of said frame and said tool support projects outwardly from said carrier outwardly of said one side of said frame.
11. A machine tool as defined in claim 5 wherein said means supporting said carrier comprises means for supporting said carrier to move said tool support in a plane containing said axis of rotation of said member and said indexing axis.
12. A machine tool as defined in claim 4 wherein said carrier comprises a bearing means ant said support comprises a portion mounted within said bearing means for indexing movement and for axial movement in said work stroke.
13. A machine tool as defined in claim 12 wherein said means supporting said carrier comprises means supporting said carrier for movement in a path projecting through said axis of rotation.
14. A machine tool as defined in claim 12 wherein said outer end of said rotatable member is disposed adjacent one side of said frame and said tool support projects outwardly from said carrier outwardly of said one side of said frame.
15. A machine tool as defined in claim 5 wherein said carrier comprises a bearing means and said support comprises a portion mounted within said bear-ing means for indexing movement and for axial movement in said work stroke.
16. A machine tool as defined in claim 1 wherein said tool support has a cylindrical shaft portion fixed thereto and said carrier has bearing means receiving said shaft portion for rotation and for axial movement in the bear-ing means whereby said turret may be indexed and moved through said work stroke, said power driven means comprising means operatively connected to said shaft portion for indexing said tool support and for moving said tool support in its work stroke.
17. A machine tool comprising a frame, a rotatable member having an axis of rotation and having an outer end for supporting a workpiece to machine for rotation with said member about said axis, an indexible tool support displaced to one side of said axis and comprising means for mounting turning and end-working tools on said tool support in each of a plurality of angular positions about an indexing axis parallel to said axis of rotation and at different locations, displaced axially along said tool support, said tool support to be movable along a first axis parallel to said axis of rotation in an advance movement relative to said frame to effect a work stroke for machining said workpiece and for return movement along said first axis to a retracted posi-tion and for movement along a second axis orthogonally related to said first axis to move said tool support toward and away from said axis of rotation, a carrier for supporting said tool support, means mounting said carrier on said frame alongside said rotatable member for movement along one of said first and second axes, means mounting said tool support on said carrier for move-ment relative to said carrier along the other of said first and second axes, said tool support projecting outwardly of said carrier in a direction away from the outer end of said rotatable member and parallel to said axis of rot-ation to said retracted position and movable along said other axis toward said rotatable member from said retracted position to a maximum advanced position, which positions definethe maximum work stroke of said tool support, and power driven means for moving said tool support along said first and second axes and for indexing the latter.
18. A machine tool as defined in claim 17 wherein said tool support projects outwardly relative to said carrier to a position at least approxi-mately twice the distance of the maximum work stroke of said tool support to support an end-working tool for machining the workpiece for substantially the maximum work stroke of the tool support.
19. A machine tool as defined in claim 18 wherein said tool mounting means on said tool support comprises means for mounting a turning fool with its cutting edge in a plane to machine the outer periphery of a workpiece at least at the beginning of the work stroke with the tool support in its re-tracted position and for mounting an end working tool having its cutting edge in said plane and the end-working tool extending parallel to the axis of the rotatable member for a distance at least approximately equal to the length of the maximum work stroke of said tool support whereby said end-working tool is adapted to machine the workpiece inwardly from the outer end thereof for sub-stantially the full length of the maximum work stroke as the tool support is moved through its work stroke, said driven means comprising means for moving said tool support in different length work strokes.
20. A machine tool as defined in claim 17, 18 or 19, wherein said tool support comprises a plurality of tool supporting surfaces arranged about said indexing axis and extending generally parallel to the axis of said rotation of said rotatable member for the distance of said maximum work stroke.
21. In a machine tool, an assembly comprising an indexible tool supporting member having an indexing axis and being supported for movement through a maximum work stroke, said tool supporting member having means for supporting tools in a plurality of positions angularly displaced about said axis including in each angular position means for mounting a turning tool in a first position on said member with its working edge in a plane extending transversely of the indexing axis for machining for substantially the entire length of the maximum work stroke and for mounting an end-working tool in a second position displaced axially from the first position approximately the length of said maximum work stroke with the tool extending parallel to said indexing axis and its working end in said plane whereby said end-working tool may machine substantially the entire work stroke, means for supporting said tool supporting member for movement along a first line to move the member axially of its axis to effect said work stroke and for movement along a second line orthogonally related to said first line comprising a carrier having ways thereon for co-operating with ways on a machine tool bed to support said carrier for movement along said second line and means mounting said tool supporting member on said carrier for indexing movement about said indexing axis and supporting said tool supporting member on said carrier for movement along the other of said lines and power drive means for moving said carrier along said second line of movement, for indexing said turret, and for moving said tool supporting member along said first line through various length work strokes including said maximum work stroke.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14872971A | 1971-06-01 | 1971-06-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1076787B true CA1076787B (en) | 1980-05-06 |
Family
ID=22527090
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA143,266A Expired CA972543A (en) | 1971-06-01 | 1972-05-29 | Machine tool |
| CA333,583A Expired CA1076787B (en) | 1971-06-01 | 1979-08-10 | Machine tool |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA143,266A Expired CA972543A (en) | 1971-06-01 | 1972-05-29 | Machine tool |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS5816961B2 (en) |
| BR (1) | BR7203525D0 (en) |
| CA (2) | CA972543A (en) |
| CH (1) | CH583079A5 (en) |
| DE (1) | DE2226617A1 (en) |
| FR (1) | FR2141121A5 (en) |
| GB (1) | GB1386167A (en) |
| IT (1) | IT955978B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE388554B (en) * | 1973-06-06 | 1976-10-11 | Smt Machine Co Ab | LATHE |
| JPS60196324A (en) * | 1984-03-21 | 1985-10-04 | Mitsubishi Heavy Ind Ltd | Changeover device of operation data of injection molding machine |
| JPS62282801A (en) * | 1986-05-31 | 1987-12-08 | Tsugami Corp | Complex processing lathe |
| JPH02248129A (en) * | 1989-03-20 | 1990-10-03 | Hitachi Ltd | Timing correcting system |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE734296C (en) * | 1941-03-30 | 1943-04-12 | Boehringer Gmbh Geb | Cutting machine tool, in particular a lathe |
| US2368734A (en) * | 1942-10-30 | 1945-02-06 | Engineering & Res Corp | Method of making laminated wooden propeller blades |
| US2534333A (en) * | 1945-04-13 | 1950-12-19 | Hopkins Wyrick Lab Inc | Turret |
| DE960407C (en) * | 1953-03-06 | 1957-03-21 | Boley Werkzeug Und Maschinenfa | Feed device for the tool slide of a lathe |
| US3191470A (en) * | 1962-08-21 | 1965-06-29 | Carl F Pabst | Lathe |
| DE1477592C3 (en) * | 1964-03-10 | 1974-01-10 | Fa. A. Monforts, 4050 Moenchengladbach | Turret lathe |
| US3288005A (en) * | 1964-07-09 | 1966-11-29 | Tringale Joseph | Indexing rotary tool holder |
| DE1502023A1 (en) * | 1965-04-23 | 1969-05-14 | Gildemeister Werkzeugmasch | Lathe with a compound slide and two tool turret heads |
| GB1190579A (en) * | 1966-08-12 | 1970-05-06 | Wickman Mach Tool Sales Ltd | Automatic Lathes. |
| US3436994A (en) * | 1967-01-05 | 1969-04-08 | Warner Swasey Co | Machine tool |
| DE1652728B2 (en) * | 1968-02-23 | 1973-03-15 | Werkzeugmaschinen Fabrik Gildemei ster & Co, AG, 4800 Bielefeld | CURVELESS PROGRAM CONTROLLED FOUR-SPINDLE AUTOMATIC LATHE WITH HORIZONTALLY MOUNTED SPINDLE DRUM |
| DE1952050C3 (en) * | 1969-10-16 | 1983-12-08 | Index-Werke Kg Hahn & Tessky, 7300 Esslingen | Automatic turret lathe |
-
1972
- 1972-05-26 GB GB2501072A patent/GB1386167A/en not_active Expired
- 1972-05-29 IT IT2501272A patent/IT955978B/en active
- 1972-05-29 CA CA143,266A patent/CA972543A/en not_active Expired
- 1972-05-31 DE DE19722226617 patent/DE2226617A1/en active Granted
- 1972-05-31 FR FR7219511A patent/FR2141121A5/fr not_active Expired
- 1972-05-31 BR BR352572A patent/BR7203525D0/en unknown
- 1972-06-01 CH CH813272A patent/CH583079A5/xx not_active IP Right Cessation
-
1979
- 1979-08-10 CA CA333,583A patent/CA1076787B/en not_active Expired
-
1980
- 1980-07-24 JP JP55101861A patent/JPS5816961B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5721204A (en) | 1982-02-03 |
| BR7203525D0 (en) | 1973-08-21 |
| GB1386167A (en) | 1975-03-05 |
| DE2226617A1 (en) | 1972-12-14 |
| FR2141121A5 (en) | 1973-01-19 |
| JPS5816961B2 (en) | 1983-04-04 |
| IT955978B (en) | 1973-09-29 |
| DE2226617C2 (en) | 1987-05-27 |
| CH583079A5 (en) | 1976-12-31 |
| CA972543A (en) | 1975-08-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |