GB2080708A - A revolving tool-bearing turret - Google Patents
A revolving tool-bearing turret Download PDFInfo
- Publication number
- GB2080708A GB2080708A GB8024405A GB8024405A GB2080708A GB 2080708 A GB2080708 A GB 2080708A GB 8024405 A GB8024405 A GB 8024405A GB 8024405 A GB8024405 A GB 8024405A GB 2080708 A GB2080708 A GB 2080708A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tool
- catch
- bearing
- base member
- bearing member
- 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.)
- Withdrawn
Links
- 230000008878 coupling Effects 0.000 claims abstract description 32
- 238000010168 coupling process Methods 0.000 claims abstract description 32
- 238000005859 coupling reaction Methods 0.000 claims abstract description 32
- 230000002441 reversible effect Effects 0.000 claims description 5
- ZPUCINDJVBIVPJ-LJISPDSOSA-N cocaine Chemical group O([C@H]1C[C@@H]2CC[C@@H](N2C)[C@H]1C(=O)OC)C(=O)C1=CC=CC=C1 ZPUCINDJVBIVPJ-LJISPDSOSA-N 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q16/00—Equipment for precise positioning of tool or work into particular locations not otherwise provided for
- B23Q16/02—Indexing equipment
- B23Q16/08—Indexing equipment having means for clamping the relatively movable parts together in the indexed position
- B23Q16/10—Rotary indexing
- B23Q16/102—Rotary indexing with a continuous drive
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
- Automatic Tool Replacement In Machine Tools (AREA)
Abstract
A multi-position revolving tool-bearing turret 1 comprises a base member 2, a tool-bearing member 4 rotatably mounted on the base member and axially movable with respect thereto, and a control member 8 extending within and screw-threadedly connected to the member 4, and mounted for rotation in both senses in the base member. A toothed clutch 15, 16 is disposed between the tool-bearing member 4 and the base member 2 so that by rotation of member 8 relative to member 4 the member 4 can be moved via the threaded coupling 19 axially to engage and disengage clutch 15, 16. A first unidirectional coupling provided between the control member 8 and the tool-bearing member 4 comprises a catch member 36 engageable in a recess 34 in control member 8, while a second unidirectional coupling provided between the tool-bearing member 4 and the base member 2, comprises a catch member 32 engageable in recesses 31 in the base member. The catch members 32, 36 are guided for sliding longitudinally along a common passage formed in the member 4, and the arrangement is such that simultaneous disengagement of the two catch members from their respective recesses is prevented. <IMAGE>
Description
SPECIFICATION
A revolving tool-bearing turret
This invention relates to a multi-position revolving tool-bearing turret of the kind comprising: a base member, a tool-bearing member rotatably mounted on the base member and axially movable along the axis around which it can rotate, a control member rotatably mounted on the base member coaxial with the tool-bearing member and rotatable in both directions under the action of reversible driving means, a clutch being provided acting between the toolbearing member and the base member so as to prevent rotational movement of the tool bearing member relative to the base member in one axial position of the tool bearing member relative to the base member and to permit such rotational movement in another such axial position, a threaded coupling being provided between the control member and the tool-bearing member, whereby, by rotational movement of the control member relative to the tool-bearing member, the tool-bearing member can be moved axially between said one and said other axial positions thereof, a first unidirectional coupling acting between the tool bearing member and the base member and a second uni-directional coupling acting between the control member and the tool-bearing member whereby, when said clutch is disengaged, in one direction of rotation of the control member said tool bearing member can be entrained rotationally with the control member by said second uni-directional coupling and rotated relative to the base member, whereas in the opposite direction of rotation of the control member, the first uni-directional coupling can restrain the toolbearing member from rotation relative to the base member while the control member rotates relative to the base member and the tool-bearing member, and wherein each of said uni-directional couplings comprises a movable catch carried by one ofthe two members between which the coupling acts and spring biased towards the other of the two members between which the coupling acts, for engagement with a recess in said other of the two members between which the coupling acts.
A turret of the above kind is herein referred to as being "of the kind specified".
In the case of multi-position revolving tool-bearing turrets, the tool-bearing member must be lockable exactly in each position.
In the case of known turrets in present use, it may happen that the tool-bearing member moves beyond the chosen position by rotating a further distance or moving through a further, undesired angle.
This may happen when the tool-bearing member is rotating fast and has strong inertial torques on stopping, or when the turret is mounted so that its axis of rotation is horizontal and the tool-bearing member is secured to a large tool which unbalances it.
As a result of the excess rotation, the tool-bearing member is not locked in the exact chosen angular position.
In the case of existing turrets, the avoidance of the aforementioned excess rotation results in a disadvantage in that the tool-bearing member has to be balanced by counter-balancing the heavy tools; in all cases the tool-bearing member has to rotate very slowly.
Some proposed tool-bearing turrets do not rotate excessively in the aforementioned manner; the aforementioned turrets are stopped in the exact chosen position but have a disadvantage in that there is a mechanical jolt, resulting in noise and possible breakage.
The invention is based on the problem of devising a turret which has structural and functional properties which meet the aforementioned requirement but which overcomes the aforementioned disadvantages of the prior art.
To this end, the invention provides a turret of the aforementioned kind specified, in which each said catch has an active end for engagement with the respective recess or recesses, and a tail end remote from said active end, the catches having said tail ends thereof facing one another, and the arrange ment being such that relative movement of the catches towards one another and against the spring bias acting on each catch, is limited by abutment of said tail ends of the catches before both of the catches are fully out of engagement with their respective recesses.
A preferred embodiment of the invention is described below by way of example, with reference to the accompanying drawings in which:
Figure 1 is a view in axial section of a turret embodying the invention in a locked position;
Figure 2 is a partial view of the turret, in section along line Il-Il in Figure 1 and
Figures 3, 4, 5,6,7 and 8 are diagrammatic fragmentary developed views of parts of Figures 1 and 2 in the various positions which said parts adopt during operation.
Referring to the accompanying drawings, a turret 1 has a base member 2 adapted to be rigidly secured, via its planar bottom face 3, to a machine tool (conventional and therefore not shown).
A tool-bearing member4 is mounted on base member 2 and has a number of external seats 5 adapted to hold tools (conventional and not shown) in conventional manner and provided with means (i.e. slides 6 and locking screw 7) for securing the aforementioned tools.
The tool-bearing member 4 is mounted on the base member 2 so that it can rotate around an axis x-x perpendicular to the bottom face 3 and can move axially along axis x-x.
Turret 1 also has a control member 8 mounted in the base member 2 via conventional rolling element bearings 9, 10 and 11, for rotation about axis x-x.
Member8 is rotatable in both rotational senses around the axis x-x under the action of reversible driving means which will be described hereinafter.
Bearings 9 and 10 are fitted directly in base member 2, whereas bearing 11 is mounted in an end member 12 firmly secured to the base member 2 by screws 13.
A toothed face clutch or dog clutch, indicated at 14, is disposed between the base member 2 and the tool-bearing member 8. Clutch 14 comprises a toothed ring 15 secured to base member 2 and a toothed ring 16 secured to the tool-bearing member 4, the toothed ring 5 being so secured by screws 17 and pins 18 in conventional manner. A threaded coupling 19 is provided between tool-bearing member 4 and control member 8, and comprises an external screw-thread formed on member 8 in threaded engagement with a complementary screw-thread formed in member 4.
Member 4 has internal cylindrical bearing surfaces 20 and 21 engaging, respectively, a corresponding external cylindrical surface 22 formed on the toothed ring 15, and a corresponding external cylindrical surface 23 formed on the base member 2 itself.
Member 4 also has an internal cylindrical surface 24 engaging a corresponding external cylindrical surface 25 formed on the control member 8, more particularly formed on a ring 26 which is firmly secured, by a screw 27 and pins 28 and 29, to the remainder of member 8.
Turret 1 also comprises a first unidirectional coupling 30 acting between member 4 and member 2.
This coupling 30, which acts on a one-way clutch comprises a plurality of recesses 31 formed in a planar annular face of member 2 which is parallel with and faces in the opposite direction from, bottom face 3, and the coupling further comprises a spring biased catch member 32 carried by the tool-bearing member 4. The number of recesses 31 is equal to the number of positions of turret 1.
Catch 32 has an active end 32a for engagement with recesses 31.
Turret 1 also has a second unidirectional coupling I 33 acting between the tool-bearing member 4 and the control member 8. This coupling 30, which also acts as a one-way clutch, comprises a recess 34 formed in a planar face, facing in the same direction as, and parallel with, bottom face 3 and parallel therewith, provided by a plate 35 forming part of member 8 and firmly secured to ring 26 by the aforementioned screw 27 and pins 28 and 29. The coupling 33 also comprises a spring biased catch member 36 also carried by the tool-bearing member 4. Catch 36 has an active end 36a adapted to engage recess 34.
The catch 32 and the catch 36 are disposed in line with one another in the axial direction within a common passage 37 formed in the tool-bearing member 4, this passage 37 extending parallel with the axis x-x and being open at either end, one open end facing the face provided with recesses 31 and the other open end facing the face of plate 35 provided with recess 34. The active ends of the catch members 32,36 extend from respective open ends of said passage, and the catch members have
respective tail ends 32b, and 36b opposite their active ends 32a and 36a, the tail ends being disposed within said passage and facing one another along said passage.The catch members are guided for longitudinal sliding movement along said passage and are acted upon by a single compression spring
38 disposed between the catches and received in
recesses 37 in the tail ends of the catch members.
The control member 8 is acted upon by reversible
driving means 39 comprising an electric motor (conventional and therefore not shown) kinematically connected to an endless screw 40 which engages a toothed wheel 41 secured by a key 42 to member 8 so as to rotate integrally therewith.
The tool-bearing member 4 has a top cap 43 seo ured by screws 44 and a bottom ring 45 located by a pin 46 so as to rotate integrally with member 4 whilst being axially displaceable thereon. Member4 is held in the illustrated position in engagement with the base member 2 by springs 47, so as to prevent chips and/or dirt from penetrating belween the toot bearing member and the base rwber when the former is raised from the latter.
The operation of the turret accc'rtlng to the invention will now be described with reference to its initial state, when the turret is locked as shown in Figures 1,2and3.
Under the action of the driving means 39, the con- trol member 8 rotates in the directiors of arrow f (Fig- ure 3) and, via the threaded coupling tS, axially moves the tool-bearing member, so that clutch 14 disengages and is released (Figure4). When recess 34 registers with catch 36 which engages therein, member 8 drives the tool-bearing member 4 in rotation. During the rotation (Figure 5f catch 32 leaves the recess 31 in which it was engaged and moves, with member 4, into register with the next recess and is moved into engagement therewith by spring 38.When the member 4 has been rotated far enough for this to happen (Figure 6), the driving means 39 and the control member 8 are stopped, but the toolbearing member4 may continue to rotate by a further amount in the direction of arrowg, e.g. as a result of the inertias torque or under the action of unbalancedlools, so that member 4 is moved to the position showmin Figure 7.
Now it wilt be noted that the length of each of the catch members 36,32 is so selected, in relation to the spacinef le the axial direction, between the faces in which the recesses 31,34 are formed;, and the depth of these recesses, that when either catch member i6 fidly engaged in the respective recess, while the other is in engagement with an unrscessed part of tlhe respective recessed face, (c.f Figures 5 and 8) the spacing between the taillends of the catch members is very small so that from therelative positions cscupied by the catch memberswhen fully engaged in respective recesses, the major part of the movernent necessary to bring ttrrtail ends into abutment has been made, and such abutment between the tail ends of the catch members prevents simuttaneous withdrawal of beth catch members from their respective recesses, Thus, in the positions, shown in Figure 7, further movement of member 7 in the direction of arrowg in Fre6is presented by ' abutment of the sloping faces ofthe catch members with the corresponding faces ofthe recesses in which they are engaged, furthereamming of the catch
members out of their recesses being prevented by
abutment of the catch members with one another.
The maximum amount of excess rotation has been
indicated by a in Figure 7 and depends on the distance (H in Figure 6) between the tail ends of the
catches when both are engaged in their recesses.
During this excess rotation, the angular speed of the tool-bearing member is gradually reduced by the braking effect of spring 38.
After the position shown in Figure 7 is reached, and after the member 4 has been returned to the position shown in Figure 6 if the action of spring 38 alone is able to achieve this, the driving means 39 reverse the direction of rotation and member 8 is rotated in the direction ofarrowh, in the opposite direction from that of arrowf. If spring 38 is not itself able to do so, such movement of member 8 brings the tool-bearing member 4 back to the correct position, thus counteracting the aforementioned excess rotation a.The tool bearing member 4 remains in this angular position during further rotation of member 8 since catch 32 engages the recess 31 while member 4 is moved axially until clutch 14 engages as a result of the rotation of the control member Sin the opposite direction from arrow, and after further rotation of member8the device locks and the turret is back in a position similar to that in
Figure 8, i.e. has moved through an angle to the next position and is locked therein.
In the embodiment described, the catches are aligned in a direction parallel to the axis x-x. Of course, the catches can be aligned in another direction at a substantial angle to axis x-x, e.g. they can be aligned in a radial direction or in a direction perpendicular to axis x-x. In that case the respective recesses will be formed on opposite surfaces, one belonging to the control member and the other belonging to the base member, the surfaces being, for example, cylindrical or flat.
The main advantage of the turret described with reference to the drawings is that the tool-bearing member is always locked in the exact chosen position, and operation is rapid and free from jolts.
Claims (7)
1. A multi-position revolving tool-bearing turret ofthe kind comprising: a base member, a toolbearing member rotatably mounted on the base member and axially movable along the axis around which it can rotate, a control member mounted for rotation relative to the base member coaxially with the tool-bearing member, and the control member being rotatable in opposite senses about its axis under the action of reversible driving means, a clutch being provided acting between the tool bearing member and the base member so as to prevent rotational movement of the tool-bearing member relative to the base member in one axial position of the tool-bearing member relative to the base member and to permit such rotational movement in another such axial position, a threaded coupling being provided between the control member and the tool bearing member, whereby, by rotational movement of the control member relative to the tool-bearing member, the tool-bearing member can be moved axially between said one and said other axial positions thereof, a first uni-directional coupling acting between the tool bearing member and the base member, a second uni-directional coupling acting between the control member and the toolbearing member whereby, when said clutch is disengaged, in one direction of rotation of the control member said tool bearing member can be entrained rotationally with the control member by said second uni-directional coupling and rotated relative to the base member, whereas in the opposite direction of rotation of the control member, the first unidirectional coupling can restrain the tool-bearing member from rotation relative to the base member while the control member rotates relative to the base member and the tool-bearing member, and wherein, each of said uni-directional couplings comprises a movable catch carried by one of the two members between which the coupling acts and spring biased towards the other of the two members between which the coupling acts, for engagement with a recess in said other of the two members between which the coupling acts, each said catch having an active end for engagement with the respective recess or recesses and a tail end remote from said active end, the catches having said tail ends thereof facing one another, and the arrangement being such that relative movement of the catches towards one another and against the spring bias acting on each catch, is limited by abutment of said tail ends of the catches before both of the catches are fully out of engagement with their respective recesses.
2. A turret according to claim 1,in which said catches are acted upon by a single spring disposed between them.
3. A turret according to claim 1 wherein said catch of the first uni-directional coupling and said clutch in the second uni-directional coupling are both members slidable rectilinearly in a common rectilinear passage formed in the tool bearing member, the active ends of said catch members extending from respective opposite ends of the common passage, and the tail ends of the catch members facing one another along said passage, the respective recesses of said uni-directional couplings being formed in the control member and the base member respectively.
4. A turret according to claim 3 wherein both said catch members are spring biased by a single spring disposed between them within said common passage.
5. A turret according to any preceding claim wherein, when either of said catches is fully engaged in a respective recess and the other is engaged with the member provided with the recesses therefor, but is out of engagement with any said recess, the lastmentioned catch member has completed a major part of its movement towards abutment with the other said catch.
6. A multi-position revolving tool-bearing turret, substantially as hereinbefore described with reference to, and as shown in, the accompanying drawings.
7. Any novel feature or combination of features described herein.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19803025863 DE3025863A1 (en) | 1980-07-08 | 1980-07-08 | TOOL REVOLVER HEAD |
| FR8015672A FR2486841A1 (en) | 1980-07-08 | 1980-07-16 | TURRET TOOL HOLDER WITH REVOLVER BODY |
| GB8024405A GB2080708A (en) | 1980-07-08 | 1980-07-25 | A revolving tool-bearing turret |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19803025863 DE3025863A1 (en) | 1980-07-08 | 1980-07-08 | TOOL REVOLVER HEAD |
| FR8015672A FR2486841A1 (en) | 1980-07-08 | 1980-07-16 | TURRET TOOL HOLDER WITH REVOLVER BODY |
| GB8024405A GB2080708A (en) | 1980-07-08 | 1980-07-25 | A revolving tool-bearing turret |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2080708A true GB2080708A (en) | 1982-02-10 |
Family
ID=27188763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8024405A Withdrawn GB2080708A (en) | 1980-07-08 | 1980-07-25 | A revolving tool-bearing turret |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE3025863A1 (en) |
| FR (1) | FR2486841A1 (en) |
| GB (1) | GB2080708A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1134181B (en) * | 1980-11-05 | 1986-07-31 | Duplomatic | MULTI-POSITION REVOLVER TOOL HOLDER TURRET, FOR MACHINE TOOLS IN GENERAL AND FOR LATHES IN PARTICULAR |
| IT1134182B (en) * | 1980-11-05 | 1986-07-31 | Duplomatic | Indexing lathe tool carrier |
| IT1299009B1 (en) * | 1998-04-02 | 2000-02-07 | Porta S P A | DEVICE FOR CONTROL OF THE LOCKING AND RELEASING MOVEMENTS OF A ROTATING DISK WITH A GEAR SYSTEM AND MACHINE EQUIPPED WITH |
| CN107008930B (en) * | 2017-05-15 | 2018-12-11 | 朱晓东 | Numerically controlled lathe servo turret |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2038014A5 (en) * | 1970-03-12 | 1970-12-31 | Roux Jacques | |
| CH537231A (en) * | 1970-12-17 | 1973-05-31 | Buchmeier Heinz | Turret head that can be placed on a machine tool as a working unit |
| DE2146080A1 (en) * | 1971-09-15 | 1973-03-22 | Heinz Buchmeier | SWITCH TABLE OR REVOLVER HEAD TO BE MOUNTED AS A WORKING UNIT ON A MACHINE TOOL |
| IT1037890B (en) * | 1975-05-06 | 1979-11-20 | Baruffaldi Frizioni Spa | DEVICE FOR POSITIONING THE TOOL HOLDER BODY IN AUTOMATIC TURRETS FOR LATHE OR SIMILAR DURING THE ROTATION MOVEMENT OF THE SAID BODY FOR PASSING FROM ONE POSITION TO THE NEXT ones |
| DE2536004C3 (en) * | 1975-08-09 | 1980-09-18 | Heinz 2000 Hamburg Buchmeier | Turret head for machine tools, in particular lathes |
| DE2549807A1 (en) * | 1975-11-06 | 1977-05-12 | Heinz Buchmeier | Remote controlled positioning of indexing tables - has sliders which engage table or clamping ring on forward and reverse movement |
| DE2627780C3 (en) * | 1976-06-22 | 1983-11-17 | Heinz 2000 Hamburg Buchmeier | Turret head or the like. Angularly switchable component for machine tools, in particular lathes |
| IT1091964B (en) * | 1978-01-12 | 1985-07-06 | Baruffaldi Frizioni Spa | REVOLVER TURRET TOOL HOLDER FOR LATHES AND SIMILAR, WITH PERFECTED DEVICES FOR AUTOMATIC TOOL OPERATION AND POSITIONING |
| IT1092860B (en) * | 1978-01-23 | 1985-07-12 | Baruffaldi Frizioni Spa | TURRET, TOOL HOLDER WITH ELASTIC ACTION DEVICE FOR POSITIONING THE TOOL HOLDER BODY |
| IT1093787B (en) * | 1978-03-09 | 1985-07-26 | Bandera Franco | AUTOMATIC CONTROL MECHANISM OF A TURRET FOR LATHES AND SIMILAR ELECTRIC OPERATION WITH A SINGLE BIDDIRECTIONAL ROLL OPERATING WITHOUT SPRINGS |
| IT1112308B (en) * | 1979-04-17 | 1986-01-13 | Idroma Spa | SUPPORT AND CONTROL DEVICE FOR SWIVEL PLATFORMS, PARTICULARLY FOR MACHINE TOOLS |
-
1980
- 1980-07-08 DE DE19803025863 patent/DE3025863A1/en not_active Ceased
- 1980-07-16 FR FR8015672A patent/FR2486841A1/en active Pending
- 1980-07-25 GB GB8024405A patent/GB2080708A/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| DE3025863A1 (en) | 1982-01-21 |
| FR2486841A1 (en) | 1982-01-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |