CN104690603B - A kind of difunctional fixture of milling machine - Google Patents
A kind of difunctional fixture of milling machine Download PDFInfo
- Publication number
- CN104690603B CN104690603B CN201510111826.XA CN201510111826A CN104690603B CN 104690603 B CN104690603 B CN 104690603B CN 201510111826 A CN201510111826 A CN 201510111826A CN 104690603 B CN104690603 B CN 104690603B
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- alignment pin
- fixture
- main shaft
- difunctional
- casing
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Classifications
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- 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
- B23Q16/04—Indexing equipment having intermediate members, e.g. pawls, for locking the relatively movable parts in the indexed position
- B23Q16/06—Rotary indexing
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
Abstract
The invention discloses a kind of difunctional fixture of milling machine, it, which has above the partial function of indexing and clamping, workbench, T-slot and chuck positioning spigot, and according to the difference of workpiece body, chuck and piece-holder body are loaded respectively.Chuck be mainly used in polyhedron and halving hole away from processing；Cramping body is used for the more than one piece clamping time processing of shear like members body.Workbench bottom surface has point conical bore such as the positioning spigot being connected with main shaft and multi-turn and the alignment pin being fixed on body to be fitted close and reach indexing and the purpose of stationary work-table.Alignment pin is fixed in the T-slot of body by nut, and according to processing needs, alignment pin is moved to along T-slot in different conical bore circles.The main shaft of fixture is equipped with a pair of angular contact bearings and ball bearing, is securely fixed in by bearing gland and anti-return nut on body.When needing rotation work table top, while left hand flicking operation handle, right hand rotation work top, alignment pin is easily sprung into next bellmouth under spring force.
Description
Technical field
The present invention is a kind of indexing suitable for all size model universal milling machine and to cutting plate type part more than one piece clamping one
The difunctional fixture of secondary processing.
Background technology
As the machining operation of device fabrication, in the production process in face of many equipment workpieces, milling machine operation
Person can run into the multiple replacing between dividing head and flat-nose pliers within one day, especially to the disk like members body such as ring flange, oil cylinder cover
Halving hole away from brill Milling Machining, end mill head and the dividing head of universal milling machine, which all should adjust 45° angle, to be processed, the knot so done
Really, one is that general dividing head indexing is slower, its inefficiency during in face of the workpiece that small lot, single-piece clamping are processed, and two be increase
Operator more adjustment non-cutting time, and dividing head after restoring to the original state it is difficult to ensure that horizontal plane it is parallel, need again
Centering.In flat-nose pliers clamping workpiece, can equally run into some clamping problems, operator in face of it is large number of, differ in size
Shear class Product processing is more aobvious unable to do what one wishes, and because of shear class product not only out of plumb but also not parallel, flat-nose pliers can not be pressed from both sides firmly mostly
Hold, processed if workpiece is fitted on milling machine table face, find backing plate, centering, press-fit and all can bring many to operator
Inconvenience.In a word, the frequent replacing of fixture and angle constantly adjustment reduces efficiency, while it is strong to add work to operator
Degree.
The content of the invention
In accordance with the above disc-like product halving hole away from processing and the practical difficulty that is run into of shear class Product processing,
The invention provides the difunctional fixture that a kind of universal milling machine is used.
The technical solution adopted by the present invention is as follows:
A kind of difunctional fixture of milling machine, including casing, rotatable workbench and main shaft, described main shaft are a T-shaped
Main shaft, the vertical portion of T-shaped main shaft is arranged in casing, passes through bearing fit between casing；The horizontal component of T-shaped main shaft is sudden and violent
Reveal outside the enclosure, be fixedly connected with described workbench, and described workbench can rotate with the rotation of main shaft；Described
Workbench the cramping body for clamping shear class product or the chuck for disc-like product to be fixedly mounted, workbench are installed
Bellmouths of the bottom provided with the two different deciles of circle, described bellmouth and be fixed on the Last alignment pin of casing and be fitted close
Reach worktable rotary and fixed purpose.
The bellmouth of the described different deciles of two circles refers to that including two encloses bellmouths, and each circle bellmouth is decile, but
It is the decile value difference of two circle bellmouths.
The cramping body of the shear class product is arranged on rotatable work top by locating slot and T-slot, and it is wrapped
Two parts symmetrical relative to main-shaft axis are included, each section includes clamping body support frame, the level peace on clamping body support frame
It is vertically-mounted to have rotating threaded shaft equipped with movable block is clamped, arbitrarily widen or reduce cramping body according to the big I of work piece body
The distance between two parts, cramping body has pinching function, to the size practicable more than one piece of shear part that there is some difference
Clamping time processing, can improve processing efficiency more than 6 times, while 45 ° of chamfer machinings can be carried out.
Have on the work top of described rotation and seam be installed with main shaft coaxial chuck, according to workpiece body the need for,
Quick-replaceable installation is carried out between cramping body and chuck；The bottom surface of workbench is machined with the positioning spigot being connected with main shaft, seam
Periphery be machined with the conical bores of the different deciles of two circles, conical bore and the alignment pin being fixed on casing are fitted close and reach work
Platform rotates and fixed purpose.
The spindle end being connected with workbench is equipped with angular contact bearing, and tail end is equipped with ball bearing, by bearing gland, bearing
Circle spacer is firmly fixed on casing with anti-return nut, the good axial float for limiting main shaft.
Described casing side is provided with the step being integrated with, and is passed through on described step provided with one for alignment pin
Groove, the outer set clamp nut of the alignment pin is firmly fixed in the step groove of casing, it is necessary to when adjusting, unclamp fastening spiral shell
Mother, alignment pin arbitrarily can be slided and then entered along the dowel hole of different grades point circle along the step groove of casing, only needed during work by
The clamp nut back of the body is tight., it is necessary to when adjusting, unclamp clamp nut, alignment pin can arbitrarily be slipped into along the step groove of casing
In different decile circles, only clamp nut need to be carried on the back tight during work；The tail end of alignment pin be machined with 10 × 10 cube with
The elongated slot of operation handle, which coordinates, to be connected, when workbench needs rotational angle, while left hand flicking operation handle, right hand rotation
Work top, alignment pin is sprung into next bellmouth under spring force.
The indexing number of degrees of the difunctional fixture are respectively：45 °, 60 °, 90 °, 120 ° or 180 °.
The bellmouth is bushing formula bellmouth, is formed with alignment pin match grinding.
Described alignment pin is arranged at 45 ° of directions of casing, i.e. operator front and workbench X-axis angle direction at 45 °
Place.It is characterized in that alignment pin Internal and external cycle is easy to adjust, quick, bellmouth is arranged in the bottom surface of workbench, it is therefore an objective to compression clamp
Highly, it is easy to operation, larger lifting space is left to milling machine table.
The operation handle of the fixture is lever, is characterized in laborsaving, quick, each index time is can be controlled in 3 seconds
Within.
The shear class piece-holder body, is to improve to form by practicality for many years, and with simplicity, quick, clamping is firm, add
Work scope is wide, efficiency high the features such as, the problem of solving the difficult clamping of shear like members body for many years, inefficiency.
This fixture power and energy facilitates rapidly, from cramping body dismounting installed to chuck can be controlled in it is complete within 1 minute
Into.
Positioning datum when the workpiece positioning body is shear like members body more than one piece clamping.
The operation handle is lever-type, and its one end is free end, and the other end is fixed on casing one by a screw
On the step of side.
The surface cover that described alignment pin is engaged with step groove is equipped with a spring, and in one positioning of spring outer ring suit
Overcoat is sold, described alignment pin overcoat and the inner surface of step groove coordinate.
The major function that the present invention possesses：
1. shear like members body more than one piece clamping can be carried out into time processing in shear class piece-holder body, shear class is overcome
Workpiece is not only not parallel but also out of plumb brings the problem for being difficult to clamping processing to universal fixturing, can improve and add compared with original processing method
6 times of work efficiency rate.
2. shear class piece-holder body can clamping used on fixture table top, can also be individually mounted on milling machine table face
Use, clamping can carry out 45 ° of chamfer machinings to workpiece simultaneously on fixture table top.
3. the fixture is after scroll chuck is loaded, gengon rotation can be carried out to pipe joint class product and is processed.
4. a fixture is particularly good at disk like members body halving hole away from processing, overcome milling machine end mill head and dividing head and adjust
Angle process halving hole away from the drawbacks of, the control of each index time is within 3 seconds.
5. the present invention is by the use and improvement of nearly one-year age, significantly, it has firm grip, improves effect using effect
Rate, it is full-featured, reduction operator's labor intensity the advantages of.
Brief description of the drawings
Fig. 1 is the profile of the present invention；
Fig. 2 is shear class piece-holder body profile；
Fig. 3 is this fixture processing shear product structure schematic diagram；
Fig. 4 is that this fixture processes disc-like halving hole away from structural representation；
In figure：1. rotary screw, 2. gripping block fixed plates, 3. clamp movable block, 4. clamp nuts, 5. cramping bodies
Support, 6. workpiece positioning bodies, 7. scroll chucks, 8. main shafts, 9. chucks fastening screw, 10. workbench, 11. alignment pins,
12. alignment pin overcoat, 13. clamp nuts, 14. springs, 15. operation handle fixing screws, 16. operation handles, 17. casees
Body, 18. bearing glands, 19. anti-return nuts, 20. ball bearings, 21. bearing inner race spacers, 22. angular contact bearings, 23.
Bearing gland, 24. clamping body fixing bolts, 25. sheet workpieces, 26. disc-like workpiece.
Embodiment
The present invention is further described with example below in conjunction with the accompanying drawings.
As shown in Figure 1-2, the difunctional fixture of a kind of milling machine, including casing 17, rotatable workbench 10 and main shaft 8, institute
The main shaft 8 stated is a T-shaped main shaft, and the vertical portion of T-shaped main shaft is arranged in casing 17, matched somebody with somebody between casing 17 by bearing
Close；The horizontal component exposure outside the enclosure of T-shaped main shaft, is fixedly connected with described workbench 10, and the described energy of workbench 10
Rotated with the rotation of main shaft 8；The cramping body for clamping shear class product is installed in described workbench 10 or is used for
The scroll chuck 7 of disc-like product, bellmouth of the bottom provided with the different deciles of two circles of workbench 10, described cone is fixedly mounted
Shape hole reaches the rotation of workbench 10 and fixed purpose with being fixed on the Last alignment pin 11 of casing and being fitted close.
The cramping body of shear class product is arranged on rotatable work top by locating slot and T-slot, and it includes phase
For the symmetrical two parts of main-shaft axis, each section includes clamping body support frame 5, is horizontally mounted on clamping body support frame 5
There is clamping movable block 3, it is vertically-mounted to have rotating threaded shaft 1, clamp movable block 3 solid by gripping block fixed plate 2 and clamp nut 4
It is fixed.
The distance between cramping body two parts are arbitrarily widened or reduce according to the big I of work piece body, cramping body has
Pinching function, to the practicable more than one piece clamping time processing of the size shear part that there is some difference, can improve processing efficiency 6
More than times, while 45 ° of chamfer machinings can be carried out.
Have on the face of rotary table 10 and seam, i.e. chuck fastening screw 9 are installed with main shaft coaxial chuck, according to workpiece
The need for body, quick-replaceable installation is carried out between cramping body and chuck；The bottom surface of workbench is machined with the positioning being connected with main shaft
Seam, the periphery of seam is machined with the conical bore of the different deciles of two circles, and conical bore and the alignment pin 11 being fixed on casing are close
Coordinate and reach worktable rotary and fixed purpose.
The spindle end being connected with workbench 10 is equipped with angular contact bearing 22, and tail end is equipped with ball bearing 20, by bearing gland
18th, 23 bearing inner race spacers and anti-return nut 19 are firmly fixed on casing, the good axial float for limiting main shaft.
The side of casing 17 is provided with the step being integrated with, and is passed through on described step provided with one for alignment pin
Groove, the alignment pin leans on clamp nut 13 to be firmly fixed in the step groove of casing, it is necessary to when adjusting, unclamp clamp nut,
Alignment pin can along casing step groove arbitrarily slide so that enter different decile circles dowel hole in, during work only need to will tightly
Gu the nut back of the body is tight.When needing adjustment, clamp nut is unclamped, alignment pin can arbitrarily slip into difference along the step groove of casing
Decile circle in, only clamp nut need to be carried on the back tight during work；The tail end of alignment pin is machined with 10 × 10 cube and operation
The elongated slot of handle, which coordinates, to be connected, when workbench needs rotational angle, while left hand flicking operation handle, right hand rotation work
Table top, alignment pin is sprung into next bellmouth under spring force.
The indexing number of degrees of difunctional fixture are respectively：45 °, 60 °, 90 °, 120 ° or 180 °.
Bellmouth is bushing formula bellmouth, is formed with alignment pin match grinding.
Alignment pin 11 is arranged at 45 ° of directions of casing, i.e., at operator front and workbench X-axis angle direction at 45 °.Its
Feature is that alignment pin Internal and external cycle is easy to adjust, quick, and bellmouth is arranged in the bottom surface of workbench, it is therefore an objective to compression clamp height,
It is easy to operation, larger lifting space is left to milling machine table.
The operation handle of fixture is lever, is characterized in laborsaving, quick, each index time was can be controlled within 3 seconds.
Shear class piece-holder body, is to improve to form by practicality for many years, and with simplicity, quick, clamping is firm, process model
The features such as enclosing wide, efficiency high, the problem of solving the difficult clamping of shear like members body for many years, inefficiency.
This fixture power and energy facilitates rapidly, from cramping body dismounting installed to chuck can be controlled in it is complete within 1 minute
Into.
Positioning datum when workpiece positioning body 6 is shear like members body more than one piece clamping.
Operation handle 16 is lever-type, and its one end is free end, and the other end passes through an operation handle fixing screws 15
On the step for being fixed on casing side.
The surface cover that alignment pin is engaged with step groove is set with an alignment pin equipped with a spring 14, and in the outer ring of spring 14
Overcoat 12, the inner surface of described alignment pin overcoat 12 and step groove coordinates.
As shown in figure 3, being that this fixture loads piece-holder body, implement the feelings of more than one piece clamping time processing to cutting plate type part
Condition：Specifically procedure of processing is：According to the thickness size of multiple workpieces part, cramping body rotating wire is rotated counterclockwise with spanner
Sheet workpiece 25, is then placed on above clamping movable block 3 by bar 1, can be by workpiece 25 to ensure the uniformity of clamping workpiece
Side is relied on workpiece positioning body 6, and then move in the direction of the clock rotary screw 1, can so there will be certain size
The workpiece of difference is securely held between clamping movable block 3 and support 5.After Workpiece clamping, the fastening of workpiece positioning body can be unclamped
Screw, positioning body is removed by locating slot to the direction away from workpiece, to facilitate side to process.When side completion of processing, workpiece 25
According to drawing requirement carry out 45 ° of chamferings when, left hand downwards press operation handle 16, right hand rotation workbench 10, alignment pin 11 is in bullet
Enter in the presence of spring force in the tapered hole in 45 ° of directions, can then carry out chamfer machining, the like, until completion of processing.
Its processing efficiency can improve efficiency more than 6 times than original processing method.
As shown in figure 4, fixture need to carry out power and energy, operator is unloading when carrying out disc-like halving hole away from processing
While piece-holder body, scroll chuck 7 can be arranged on the chuck seam of workbench 10, and tighten chuck hub fastening spiral shell
Bolt.Clamp shown in Fig. 4 after the centering of disc-like workpiece 26, you can workpiece 26 is carried out halving hole away from processing, such as workpiece carries out 6
Halving hole unclamps alignment pin clamp nut 13 first away from processing before operator's processing, and the hole that alignment pin is adjusted to 6 equal portions is enclosed
It is interior, and securing dowel clamp nut 13, then device to hole brill Milling Machining can be carried out by drawing, treat that first hole machined is complete
Bi Hou, left hand presses downwards operation handle 16, and right hand rotation work bench with adjustable holder 10 carries out the brill Milling Machining in second hole, by this side
Method the like.The polyhedral processing of the equally applicable pipe joint class product of the method, each index time was controlled within 3 seconds,
Compared with plain dividing head processing method, its overall processing efficiency can improve more than 1 times.
Although above-mentioned the embodiment of the present invention is described with reference to accompanying drawing, not to present invention protection model
The limitation enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not
Need to pay various modifications or deform still within protection scope of the present invention that creative work can make.
Claims (9)
1. a kind of difunctional fixture of milling machine, it is characterised in that：Including casing, rotatable workbench and main shaft, described main shaft
For a T-shaped main shaft, the vertical portion of T-shaped main shaft is arranged in casing, passes through bearing fit between casing；T-shaped main shaft
Horizontal component exposes outside the enclosure, is fixedly connected with described workbench, and described workbench can be with the rotation of main shaft
Rotation；Cramping body for clamping shear class product is installed or for disc-like product to be fixedly mounted in described workbench
Have on chuck, the work top of rotation and seam is installed with main shaft coaxial chuck；The bottom surface of workbench is machined with to be connected with main shaft
Positioning spigot, the outer ring of positioning spigot is machined with the bellmouth of the different deciles of two circles, described bellmouth and is fixed on casing
On alignment pin be fitted close and reach worktable rotary and fixed purpose.
2. the difunctional fixture of milling machine as claimed in claim 1, it is characterised in that：The cramping body passes through locating slot and T-slot
On rotatable work top, it includes two parts symmetrical relative to main-shaft axis, and each section includes folder
Hold body support frame, clamping movable block be horizontally installed with clamping body support frame, vertically-mounted have a rotating threaded shaft, described two parts it
Between distance arbitrarily can widen or reduce according to the size of work piece body.
3. the difunctional fixture of milling machine as claimed in claim 1, it is characterised in that：The spindle end being connected with workbench is equipped with corner connection
Contact bearing, tail end is equipped with ball bearing, and described main shaft is firmly fixed by bearing gland, bearing inner race spacer and anti-return nut
On casing, the axial float of main shaft is limited.
4. the difunctional fixture of milling machine as claimed in claim 1, it is characterised in that：Described casing side is provided with and is integrated with
Step, the groove passed through on described step provided with one for alignment pin, the alignment pin is firmly fixed by clamp nut
, it is necessary to when adjusting, unclamp clamp nut, alignment pin arbitrarily can be slided and then entered along the step groove of casing in the step groove of casing
In the bellmouth for entering different decile circles, only clamp nut need to be carried on the back tight during work.
5. the difunctional fixture of milling machine as claimed in claim 4, it is characterised in that：Also include an operation handle, described behaviour
It is lever-type to make handle, and its one end is free end, and the other end is fixed on the step of casing side by a screw.
6. the difunctional fixture of milling machine as claimed in claim 1, it is characterised in that：The tail end of described alignment pin is machined with and grasped
Make the cube that the elongated slot of handle coordinates, when workbench needs rotational angle, while left hand flicking operation handle, right hand rotation
Work top, alignment pin is sprung into next bellmouth under spring force.
7. the difunctional fixture of milling machine as claimed in claim 1, it is characterised in that：The indexing number of degrees difference of the difunctional fixture
For：45 °, 60 °, 90 °, 120 ° or 180 °.
8. the difunctional fixture of milling machine as claimed in claim 1, it is characterised in that：Described alignment pin is arranged on 45 ° of sides of casing
To at place, i.e. operator front and workbench X-axis angle direction at 45 °.
9. the difunctional fixture of milling machine as claimed in claim 1, it is characterised in that：What described alignment pin was engaged with step groove
Surface cover is set with spring outer ring an alignment pin overcoat equipped with spring, described alignment pin overcoat and step groove it is interior
Surface engagement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510111826.XA CN104690603B (en) | 2015-03-13 | 2015-03-13 | A kind of difunctional fixture of milling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510111826.XA CN104690603B (en) | 2015-03-13 | 2015-03-13 | A kind of difunctional fixture of milling machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104690603A CN104690603A (en) | 2015-06-10 |
| CN104690603B true CN104690603B (en) | 2017-09-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510111826.XA Active CN104690603B (en) | 2015-03-13 | 2015-03-13 | A kind of difunctional fixture of milling machine |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105345598B (en) * | 2015-12-18 | 2018-01-30 | 湖南机油泵股份有限公司 | A kind of general rotary table of boring machine for being easy to machining box axis hole |
| CN109396950A (en) * | 2017-08-17 | 2019-03-01 | 上海阿为特精密机械股份有限公司 | Angle positioning device and angle localization method |
| CN107617865A (en) * | 2017-09-28 | 2018-01-23 | 芜湖莫森泰克汽车科技股份有限公司 | Panoramic roofs improve the station of positioning |
| CN108656047A (en) * | 2018-05-23 | 2018-10-16 | 谢云琼 | A kind of petroleum pipeline processing rotation upender |
| CN110132753A (en) * | 2019-05-11 | 2019-08-16 | 沈阳仪表科学研究院有限公司 | Multistation flex tester |
| CN110449922B (en) * | 2019-07-09 | 2021-03-12 | 科德数控股份有限公司 | Nested formula numerical control revolving stage |
| CN114952295B (en) * | 2022-06-22 | 2024-07-09 | 德克玛精密机床(山东)有限公司 | Numerical control milling and boring machine convenient for axial positioning |
| CN116511878B (en) * | 2023-05-09 | 2024-04-05 | 亚资科技股份有限公司 | Automatic pulling and inserting linkage mechanism for rotary indexing and positioning pin |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3453568B2 (en) * | 2001-07-03 | 2003-10-06 | 株式会社武田機械 | Milling machine with built-in numerical controller equipped with work positioning means |
| CN200981121Y (en) * | 2006-12-22 | 2007-11-28 | 南京和澳机电实业有限公司 | Fast milling clamping device |
| CN201217088Y (en) * | 2008-07-07 | 2009-04-08 | 南车戚墅堰机车有限公司 | Diesel engine cylinder cover inclined hole processing device |
| CN103659462A (en) * | 2013-12-10 | 2014-03-26 | 苏州市职业大学 | Indexing mechanism |
| CN204053552U (en) * | 2014-06-10 | 2014-12-31 | 苏州创丰精密五金有限公司 | A kind of fraise jig |
| CN204209550U (en) * | 2014-09-30 | 2015-03-18 | 金华大众齿轮有限公司 | A kind of M2120 plain grinding machine internal fixture |
| CN204504893U (en) * | 2015-03-13 | 2015-07-29 | 山东滨州渤海活塞股份有限公司 | The difunctional fixture of a kind of milling machine |
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Effective date of registration: 20180323 Address after: 256602 Bohai Road, Shandong, No. twenty-one, No. 569, Binzhou Co-patentee after: BINZHOU BOHAI PRECISION MACHINERY CO., LTD. Patentee after: Binzhou Bohai piston Co., Ltd. Address before: 256602 Bohai Road, Shandong, No. 21, No. 569, Binzhou Co-patentee before: BINZHOU BOHAI PRECISION MACHINERY CO., LTD. Patentee before: Bohai Piston Co., Ltd., Bingzhou City, Shandong Prov. |
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