GB2212753A - Machine tool turret assembly - Google Patents
Machine tool turret assembly Download PDFInfo
- Publication number
- GB2212753A GB2212753A GB8827469A GB8827469A GB2212753A GB 2212753 A GB2212753 A GB 2212753A GB 8827469 A GB8827469 A GB 8827469A GB 8827469 A GB8827469 A GB 8827469A GB 2212753 A GB2212753 A GB 2212753A
- Authority
- GB
- United Kingdom
- Prior art keywords
- turret
- turret assembly
- drive
- face member
- drive unit
- 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- Withdrawn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
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
- B23Q39/00—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation
- B23Q39/02—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station
-
- 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
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/25—Movable or adjustable work or tool supports
- B23Q1/44—Movable or adjustable work or tool supports using particular mechanisms
- B23Q1/50—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism
- B23Q1/54—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism two rotating pairs only
- B23Q1/5468—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism two rotating pairs only a single rotating pair followed parallelly by a single rotating pair
-
- 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
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
-
- 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
- B23Q2220/00—Machine tool components
- B23Q2220/002—Tool turrets
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
Abstract
In a machine tool turret assembly having a drive transmission means (15, 30, 31) for transmitting drive from a drive unit (28) to a multi-tool turret face member (10) for indexing movement of the face member (10) relative to the turret assembly body (16), the drive transmission means includes a selectively operable type of transmission coupling device (34) for isolating the face member (10) from rotation by the drive unit (28). This then allows the drive unit to be operated to drive a tool carried by the turret face member whilst the face member is isolated from the drive unit. The selectively operable coupling device (34) may be substituted for a permanently coupled transmission element which is adapted to be readily replaceable. <IMAGE>
Description
"TURRET ASSEMBLY"
This invention relates to a turret assembly for a machine tool such as a computer numerically controlled (CNC) turning centre and in particular, although not exclusively, to a turret assembly capable or readily adaptable to be capable of rotatably driving a tool carried by the turret assembly.
In the design of a machine tool such as a lathe in which 9 workpiece is rotatably supported betel a driven chuck an a tailstock it is conventional to provide a turret which carries several tools. wne tools can be brought successively into engagement with the workpiece by indexing the turret through a prescrlbed angle of rotation.
ifl the design of a machine tool such as a tuning centre in which a workpiece is supported by a chuck with- out the need necessar#ly to provide a talistock it is possible to arrange that that turret carries ore or more tocls rotatably driveable relative to the turret for performing operations such as milling or drilling on a workpiece held by the chuck.In turrets of this kind it is conventional for the design of the turret to correspond in essence with that of the indexable turret used with a lathe but modified by way of addition of a tool drive unit secured to the turret for the purpo of rotatabl driving tool.
The conventional lathe type turret is not, however, easily adapted to enable turret tools to be rotatably driven relative to the turret, and the resulting adaptations have been both costly and complex.
One object of the present invention is to provide a turret assembly constructed specifically to be capable of adaptation for rotatably driving relative to the turret assembly a tool carried by said turret assembly.
Another object of the present invention is to provide an improved turret assembly having an indexable turret face and means for rotatably driving relative to the turret face a tool carried by said turret face.
In accordance with one of its aspects the present invention provides a turret assembly comprising:
- a turret assembly body,
- a turret face member for supporting a plurality of
tools, said face member being selectively rotat
able relative to the turret assembly body to permit
indexing movement of the tools to any one of a
plurality of predetermined index positions,
- coupling means selectively operable to locate the
turret face member relative to the turret assembly
body in any one of said plurality of index posi
tions,
- a drive unit,
- a face member drive transmission means for trans
mitting drive from the drive unit to the turret
face member for rotation thereof relative to the
turret assembly body when the coupling means is
in a disengaged condition, and
- said face member drive transmission means
including a transmission member releasably
secured in said transmission means so as to be
replaceable by a selectively operable transmission
coupling device.
Preferably the face member drive transmission means comprises a drive shaft to which the turret face member is secured, said shaft being selectively axially displaceable to move the coupling means to and from a disengaged condition in which the turret face member may be indexed relative to the turret assembly body.
Said drive shaft preferably comprises a splined portion which carries said releasably secured transmission member for transmission of drive from the drive unit to the shaft whereby the shaft may be displaced axially relative to the turret assembly body without corresponding relative movement of said transmission member.
The drive shaft may be biased in one axial direction, for example by spring means, and movable in a direction opposite the bias direction only by coupling control means such as a hydraulic piston and cylinder arrangement. That control means may serve also to lock the drive shaft firmly in the bias direction.
The coupling means may be a toothed type coupling, such as a Curvic coupling which comprises two gear rings each formed with specially shaped teeth in axial faces presented toward one another, one gear being fixed relative to the turret face member and the other gear being fixed relative to the turret assembly body.
It is further preferred that the turret assembly comprises a coupling position sensor responsive to the condition, engaged or disengaged, of the coupling means, and said position sensor may be arranged to ensure that the drive unit is operable to rotate the face member slowly from one to another index position only when the coupling means is in a disengaged condition.
The turret assembly may comprise an index position sensor responsive to the angular orientation of the face member relative to the assembly body or to change of said relative orientation.
In accordance with another of its aspects the present invention provides a turret assembly comprising:
- a turret assembly body,
- a turret face member for supporting a plurality of
tools, said face member being selectively rotatable
relative to the turret assembly body to permit
indexing movement of the tools to any one of a
plurality of predetermined index positions,
- coupling means selectively operable to locate the
turret face member relative to the turret assembly
body in any one of said plurality of index
positions,
- a drive unit,
- a face member drive transmission means for trans
mitting drive from the drive unit to the turret
face member for rotation thereof relative to the
turret assembly body when the coupling means is in
a disengaged condition,
- tool drive transmission means to transmit drive
from the drive unit to tool location means, and
- a transmission coupling device selectively operable
to isolate the face member from rotation by the
drive unit.
Preferably the turret assembly comprises also a drive unit controller operable to cause the drive unit, such as an electric motor, to operate selectively at either of two rotational speeds. It is further preferred that said drive unit controller is responsive to the condition of the coupling means whereby the drive unit operates only at the lower of said two rotational speeds when the coupling means is in a disengaged condition to permit relative rotation of the turret face member and turret assembly body. The drive unit controller may, for example, be operatively associated with actuation means provided to move the coupling means between engaged and disengaged conditions.
It is also preferred that said drive unit controller is arranged to cause the drive unit to operate at the higher speed only when the transmission coupling device has been operated to isolate the face member from rotation by the drive unit.
Said transmission coupling device may be of a construction similar to that of the coupling means which is operable to locate the turret face member relative to the turret assembly body. In particular the transmission coupling device may be a toothed type coupling such as a Curvic type coupling referred to above.
The tool drive transmission means may comprise an endless belt and said belt may serve also as part of the face member drive transmission means. In at least the latter case operation of the drive unit to rotate the turret face member to a new index position generally will result also in a small rotation of the tool location means; in most instance-s this will be acceptable but if necessary a tool drive coupling device may be provided to isolate the tool location means from the drive unit during indexation of the turret face member.
Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying diagrammatic drawings, in which:
Figure 1 is a longitudinal sectional view of a turret assembly in accordance with one embodiment of the present invention,
Figure 2 is an end view in the direction of arrow
A of Figure 1,
Figure 3 is a section on the line Y-Y of Figure 2,
Figure 4 is a section on the line Z-Z of Figure 2,
Figure 5 is a longitudinal sectional view of a turret assembly in accordance with a second embodiment of the present invention,
Figure 6 is an end view, part in section, in the direction of arrow B of Figure 5,
Figure 7 is a section on the line w-W of Figure 6, and
Figure 8 is a section on the line X-X of Figure 6.
Referring first to Figures 1 and 2, a twelve tool turret assembly for a machine tool comprises a turret assembly body 16 and a turret face member disc 10 rotatably supported relative to the body 16. The turret face disc 10 is secured by bolts 53 to one end 13 of a shaft 15 and the shaft is rotatably supported by a pair of axially spaced bearings 21 and 22. The turret face disc is provided with twelve equispaced holes 11 to hold tooling.
At the other, 23, of its ends the shaft 15 carries one of a pair of intermeshed straight cut gears 24,25, the other of the gears being mounted on the shaft of a rotational position sensing encoder 14.
The shaft 15 is rotatable under the action of an electrical servo motor drive unit 28 mounted on the turret assembly body 16. Drive is transmitted from the motor 28 to the shaft 15 by an endless toothed drive belt 29 which extends around a pulley 30 on the motor drive shaft and a relatively larger diameter pulley 31 rotatably mounted about the body 16, coaxial with shaft 15, by bearings 32, drive being transmitted from the pulley 31 to the shaft by a transmission member ring 54. The ring 54 is releasably secured to the pulley 31 by bolts 55 and locates at an inner region with a splined portion of the shaft for axial movement relative to the shaft.
The shaft 15 is axially movable relative to the body 16 for a purpose which will be described below.
Axial relative movement is effected by an hydraulically operated piston 17, the piston being inherently biased to the right, as viewed in Figure 1, by means of springs 18. The hydraulic piston 17 is a clearance fit over the shaft 15 and is supported axially by thrust bearings 19,20 provided one at each end of the piston.
The thrust bearings resist any tendency for rotation of the piston during rotation of the shaft so that any consequential damage to piston seals 56 is thereby avoided.
The tool face disc 10 is locatable relative to the body 16 in any of a plurality of index positions by selectively operable coupling means comprised by a
Curvic type coupling 12. This type of coupling comprises two gear rings 12A,12B, each formed with specially shaped, readily intermeshable teeth in axially confronting faces. Gear ring 12A is secured to the tool face disc 10 and gear ring 12B is secured to an end flange portion 16A of the turret body 16.
It will be appreciated therefore that the aforedescribed relative axial movement of the turret body 16 and shaft 15 enables the coupling means 12 to be moved between an engaged condition in which the gear rings 12A,12B are intermeshed to prevent relative rotation of the face disc 10 and body 16 and a disengaged condition in which the face disc 10 may be rotated relative to the body 16 by the motor 28 acting via face disc drive transmission means comprised by the shaft 15, pulleys 30,31, belt 29 and transmission member ring 54.
A wiper seal 27 serves to prevent ingress of coolant and dirt into the Curvic coupling.
To allow the gear rings 12A,12B to intermesh properly the bearing 21 supporting the shaft end 13 nearest the tool face disc 10 is a loose fit.
Two precision mechanically operated switches (only one, 26, being shown in Figure 2) monitor the axial position of the shaft 15. One indicates when the shaft has moved far enough to the left, as viewed in Figure i, to allow relative rotation of the two gear halves of the coupling 12 and the other monitors that the coupling halves are securely held in an intermeshed condition.
Positioning of the tool face disc 10 is controlled in a closed loop bi-directional manner using conventional control means software associated with the motor 28, encoder 14 and axial position sensing switches 26.
The aforedescribed embodiment of a turret assembly may be transformed readily by removal of the releasably secured transmission member ring 54 and replacement by other components as hereinafter described to provide a turret assembly of a second embodiment of the invention and suitable for rotatably driving tools relative to the face member disc 10 to perform operations such as milling and drilling.
Referring to Figure 5, in which like reference numerals are used for components that correspond with those of the first embodiment, the transmission member ring 54 bolted to pulley 31 has been replaced by an outer carrier 33 which supports one half 34A of a second Curvic coupling 34 and is secured to pulley 31. The other half 34B of the coupling 34 is supported by an inner carrier 35 which is mounted on the splined portion of the shaft for axial movement relative to the shaft. Springs 36 act between the inner carrier 35 and a stop ring 57 secured to the shaft adjacent gear 24 to bias the carrier 35 to the left, as viewed in Figure 5, against an annular stop 58 provided on the splined shaft.
When the tool face disc 10 is secured against rotation by the larger Curvic coupling 12 the smaller
Curvic coupling 34 is arranged to be disengaged thereby allowing the pulley 31 to rotate freely relative to the shaft 15. When hydraulic pressure is applied to move the piston 17 to the left, the smaller Curvic coupling 34 is arranged to become engaged before the larger coupling 12 disengages. In consequence the tool face disc 10 is always secured against free rotation.
The manner in which drive may be transmitted from the motor 28 to tool location means will now be described with additional reference to Figures 3 and 6 to 8.
The belt 29 of the first embodiment is replaced by a longer toothed belt 40 which extends around the pulleys 30,31 and an intermediate pulley 41 (see section XX in Figure 8). Drive is transmitted from the pulley 41 along shaft 42 mounted on support 43 to pulley 44. A second toothed belt 45 extends between the pulley 44 and a layshaft pulley 46 (see section
WW in Figure 7) mounted on shaft 47. An end of the shaft 47 carries a tongue drive 48 to engage the rear of a proprietary powered tooling system (not shown) mounted on the tool face disc 10. The tongue drive is springloaded by springs 49 to allow it to rotate and engage with a tool in the likely event that the two are not aligned correctly when the indexing of the disc 10 brings the tool to the working position.
The shaft 47 is supported in a housing 51, and that housing fits in place of a standard block 52 (see
Figure 3) which in the Figure 2 arrangement served to carry a coolant supply to the back of the tool face disc 10 via a spring-loaded plunger 59. The block 52 can be refitted to the new housing 51.
In the Figure 4 section on the line ZZ there is shown a precision microswitch 38 which is operable to ensure that the smaller Curvic coupling 34 is disengaged before the motor 28 is driven at a higher speed to power a tool engaged by the shaft 47.
Frpm the foregoing it will be appreciated that the present invention provides a turret assembly in which a single drive unit may be employed for both indexing movement of a turret face member and also to power tool drive transmission means. Furthermore the invention provides a turret assembly having a face member drive transmission means readily adaptable to convert a standard form of the turret assembly to one which is suitable for use on a turning centre type machine tool to perform machining operations such as milling and drilling.
Claims (1)
1. . turret assembly comprising:
- a turret assembly body,
- a turret face member for supporting a plurality
of tools, said face member being selectively
rotatable relative to the turret assembly body
to permit indexing movement of the tools to any
one of a plurality of predetermined index
positions,
- coupling means selectively operable to locate
the turret face member relative to the turret
assembly body in any one of said plurality of
index positions
- a drive unit, face member drive transmission means aor transmitting drive r-m the drive unit to the
turret face member for rotation thereof rela type to the turret assembly body #hen the coupling means is in a disengaged condition,
- tool drive transmission means to transmit drive fron the drive unit to tool location means, and
- a transmission coupling device se le ctivelv operable to isolate the face member from rDta- tion by the drive unit.
2. A turret assembly according to claim 1. and comprising a drive unit controller operable to cause the drive unit to operate selectively at either of two rotational speeds.
3. A turret assembly according to claim 2, wherein the drive unit controller is responsive to whether the coupling means is in an engaged or a disengaged condition.
4. h turret assembly according to claim 3, wherein the drive unit controller causes the drive unit to operate only at the lower of saic two rotational speeds when the coupling means is in a disengaged condition.
5. turret assembly according to any one of claims 2 to 4, wherein the drive unit controller is operable to cause the drive unit to operate at the higher of sai-d two rotational speeds only when the transmission coupling device has been operated to isolate the face member from rotation by the drive unit.
6. A turret as#embly according to any on cf claims 2 to 5, wherein the zrive unit controller is operatively associated with actuaticn means provided for mc.v#ment of the coupling means between engaged and disengaged conditions.
7. A turret assembly according to any one of the preceding claims, where In the transmission coupling device is a toothed type coupling.
8. h turret assembly according to any one of the preceding claims, wherein the tool drive transmission means comprises an endless belt.
9. A turret assembly according to claim 8, wherein said endless belt serves also as part of the face member drive transmission means.
1C. A turret assembly according to claim c, wherein a tool drive coupling device is provided to isolate the tool location means from the drive unit during indexation of the turret face member.
11. . turret assembly comprising: - a turret assembly body,
- a turret face member for supporting a plurality of tools, said face #er..ber bring selectively rotatable relative to zhe turret
assembly body to permit indexing mevement of
the tools to any one of a plurality of pre- determined index positions,
- coupling means selectively operable to locate
the turret face member relative tc the turret
assembly body in any one of said plurality of
index positions,
- a drive unit,
- a face member drive transmission means for
transmitting drive from the drive unit to the
turret face member for rotation thereof
relative to the turret assembly bocy #:hen the
coupling means is in a disengaged condition,
and
- said face member drive transmission means
including a transmission member releasably
secured in said transmission means so as to
be replaceable by a selectively operable
transmission coupling device.
12. A turret assembly according to any one of the preceding claims, wherein the face member drive trans missioTh means comprises a drive shaft to which the turret face member is secured.
13. A turret assembly according to claim 12, wherein said drive shaft is selectively axially displaceable to ove the coupling means to and from a disengaged condition in which the turret face ember may be Indexed relative to the turret assembly body.
14. A turret assembly according to claim 13 when dependent on claim 11, wherein said drive shaft comprises ; splined portion on which said releasably secured transmission member is carried for transmission of drive from the drive unit to the shaft.
15. A turret assembly according to any one of claims 12 to 14, wherein the drive shift is axially biased.
16. turret assembly according to claim 15, wherein the drive shaft is axially biased in one axial direction by spring means.
17. A turret assembly according to claim 15 or claim 16, wherein coupling control means is provided for axial movement of the drive shaft in a direction opposite the bias direction.
18. A turret assembly according to claim 17, wherein said coupling control means comprises an hydraulic piston and cylinder arrangement.
19. A turret assembly according to claim 17 or claim 18, herein said coupling control means is operable also to look the drive shaft firmly in the bias direction.
20. turret assembly according to any one of the preceding claims, wherein the coupling means is a toothed type coupling comprising two gear rings secured resectiv- ely relative to the turret face .member and turret assembly body.
21. A turret assembly according to claim 2W, wherein said gear rings are secured to respective confronting surfaces of the turret face member and turret assembly body and are arranged to move into and out of engagement with one another upon relative axial movement of the turret face member and turret assembly body.
turret assembly according to any one of the preceding claims and comprising a coaling position sensor responsive to whether the coupling means is in an engaged or a disengaged condition.
23. A turret assembly according to claim 22, wherein said coupling position sensor is arranged to ensure that the drive unit is operable to rotate the face member only when the coupling means is in a disengaged condition.
24. k turret assembly according to any one of the preceding claims and comprising an index position sensor responsive to the angular orientation of the turret face member relative to the turret assembly body or to change of said relative orientation.
25. A turret assembly constructed and arranged substantially as hereinbefore described, lith reference to Figures 1 to 4 of the acccm.zanying drawings.
26. turret assembly constructed and arranged substantially as hereinbefore described, with reference to Figures 5 to 8 of the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8727945A GB8727945D0 (en) | 1987-11-30 | 1987-11-30 | Turret assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8827469D0 GB8827469D0 (en) | 1988-12-29 |
| GB2212753A true GB2212753A (en) | 1989-08-02 |
Family
ID=10627733
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8727945A Pending GB8727945D0 (en) | 1987-11-30 | 1987-11-30 | Turret assembly |
| GB8827469A Withdrawn GB2212753A (en) | 1987-11-30 | 1988-11-24 | Machine tool turret assembly |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8727945A Pending GB8727945D0 (en) | 1987-11-30 | 1987-11-30 | Turret assembly |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB8727945D0 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5885199A (en) * | 1996-02-06 | 1999-03-23 | Shao; Wenyuan | Compact machining center for multifunction |
| CN103084838A (en) * | 2012-11-14 | 2013-05-08 | 柳州易舟汽车空调有限公司 | Equipment for machining machine shell of scroll compressor |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105436893B (en) * | 2014-08-07 | 2018-01-19 | 东营信盛机械有限公司 | The automatic milling both ends of the surface drill centres machine tool of bearing pin |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0220359A2 (en) * | 1985-10-29 | 1987-05-06 | Hardinge Brothers Inc. | Live tooling turret |
-
1987
- 1987-11-30 GB GB8727945A patent/GB8727945D0/en active Pending
-
1988
- 1988-11-24 GB GB8827469A patent/GB2212753A/en not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0220359A2 (en) * | 1985-10-29 | 1987-05-06 | Hardinge Brothers Inc. | Live tooling turret |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5885199A (en) * | 1996-02-06 | 1999-03-23 | Shao; Wenyuan | Compact machining center for multifunction |
| CN103084838A (en) * | 2012-11-14 | 2013-05-08 | 柳州易舟汽车空调有限公司 | Equipment for machining machine shell of scroll compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8827469D0 (en) | 1988-12-29 |
| GB8727945D0 (en) | 1988-01-06 |
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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) |