CN102161162A - Hydraulic clamp for processing spindle taper hole - Google Patents
Hydraulic clamp for processing spindle taper hole Download PDFInfo
- Publication number
- CN102161162A CN102161162A CN2011100892804A CN201110089280A CN102161162A CN 102161162 A CN102161162 A CN 102161162A CN 2011100892804 A CN2011100892804 A CN 2011100892804A CN 201110089280 A CN201110089280 A CN 201110089280A CN 102161162 A CN102161162 A CN 102161162A
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- Prior art keywords
- clamp body
- under fluid
- conduit under
- fluid pressure
- taper hole
- 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.)
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- 239000012530 fluid Substances 0.000 claims description 58
- 238000003754 machining Methods 0.000 claims description 19
- 239000011148 porous material Substances 0.000 claims description 14
- 238000010276 construction Methods 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 8
- 230000005855 radiation Effects 0.000 claims description 7
- 229910000639 Spring steel Inorganic materials 0.000 claims description 4
- 230000008602 contraction Effects 0.000 claims description 4
- 239000003607 modifier Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 238000000227 grinding Methods 0.000 abstract description 5
- 238000003801 milling Methods 0.000 abstract 1
- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229910001651 emery Inorganic materials 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- Gripping On Spindles (AREA)
Abstract
The invention discloses a hydraulic clamp for processing spindle taper hole, which realizes grinding instead of milling, solves the problem of coaxiality between a spindle bearing shift of a core part spindle on the high-speed electrical spindle of the core part of a high-speed numerically controlled machine tool and a spindle taper hole, and improves the manufacturing precision of the core part spindle on the high-spindle electrical spindle. The hydraulic clamp comprises a clamp body, wherein the rear end of the clamp body is coaxially connected to the spindle of the precise numerically controlled machine tool; the front end of the clamp and the clamp are coaxially sleeved with an outer expansion sleeve for clamping parts to be processed; the clamp body comprises an inner radiate hydraulic pipeline system which uniformly pressures the inner wall of the outer expansion sleeve; and the radiate hydraulic pipeline system comprises a plurality of radiate hydraulic pipelines with the same aperture, which radiate the later wall of the clamp body uniformly by taking a central axis of the outer expansion sleeve as the centre.
Description
Technical field
The present invention relates to the Machining Technology field, particularly a kind of hydraulically operated fixture that is used for the little taper hole of machining spindle, described main shaft are the core parts of the core component-high-speed electric main shaft of high-speed numeric control lathe.
Background technology
Be high speed, the high accuracy that satisfies Digit Control Machine Tool, the performance requirement that hangs down vibration, low noise etc., high-speed electric main shaft is as the Core Feature parts of high-speed numeric control lathe, and the height of its quality is directly connected to the precision of Digit Control Machine Tool.And the core part of high-speed electric main shaft is exactly a main shaft, and its requirement to accuracy of manufacture key is exactly the axiality of bearings at both ends shelves and spindle taper hole, and general the requirement is controlled in the 0.002mm surface roughness Ra 0.8 μ m.Wherein, particularly little taper hole, manufacture difficulty is quite big, the general both at home and abroad at present numerical control universal grinding machine external of " two is outer in one " three bistriques that adopts is processed, when carrying out the grinding of conelet hole, because grinding wheel diameter is less, cause the linear velocity of emery wheel very big, grinding surface quality does not reach requirement, and the production cost height, and production efficiency is low.
Summary of the invention
The present invention is directed to defective and deficiency that prior art exists, a kind of hydraulically operated fixture that is used for the little taper hole of machining spindle is provided, solve the problem of main shaft bearing shelves and main shaft conelet hole axiality, improved the accuracy of manufacture of main shaft; Described main shaft is the core part of the core component-high-speed electric main shaft of high-speed numeric control lathe.
Technical scheme of the present invention is:
A kind of hydraulically operated fixture that is used for the little taper hole of machining spindle, it is characterized in that, comprise clamp body, described clamp body rear end is connected with the accurate digital control lathe spindle is coaxial, described clamp body front end and clamp body coaxial package are useful on the outer expanding sleeve that clamps part to be processed, comprise the radial conduit under fluid pressure system that evenly exerts pressure to the outer expanding sleeve inwall in described clamp body, described radial conduit under fluid pressure system comprises that with the outer expanding sleeve central axis be homogeneous radiation and the some radial conduit under fluid pressure that bore is identical of middle mind-set clamp body sidewall.
Described outer expanding sleeve inwall middle part be the inside thin-wall construction of contraction distortion, has the cylindric hydraulic cavities of encirclement outer expanding sleeve inwall thin-wall construction in the middle part of the corresponding outer wall, and the middle part of described cylindric hydraulic cavities has the annulus projection; Described radial conduit under fluid pressure is communicated with hydraulic cavities in annulus projection corresponding position perpendicular to the hydraulic cavities outer wall.
Described radial conduit under fluid pressure system comprises four radial conduit under fluid pressures that are communicated with the cylindric hydraulic cavities of outer expanding sleeve, article four, radial conduit under fluid pressure connects respectively and is parallel to outer expanding sleeve and extands rearward to the clamp body rear portion and four vertical conduit under fluid pressures that equate with the outer expanding sleeve vertical range, and described four vertical conduit under fluid pressures intersect the transverse hydraulic pipelines that are communicated with mutually with vertical two of four vertical conduit under fluid pressures and are interconnected by what be positioned at the clamp body rear portion.
Described clamp body bottom center position inwardly is drilled with column pipeline intercommunicating pore, and described transverse hydraulic pipeline intersects connection mutually at pipeline intercommunicating pore place, and the position of the corresponding pipeline intercommunicating pore in clamp body bottom surface has tapped through hole, and sealing screw is housed on the tapped through hole.
Have plunger on the sidewall of described clamp body, described plunger inwardly is connected on the pipeline intercommunicating pore outer wall from sidewall, and the pinching screw of the application of force is installed on the plunger.
Have tapped through hole corresponding to radial conduit under fluid pressure and the infall of vertical conduit under fluid pressure and the infall of vertical conduit under fluid pressure and transverse hydraulic pipeline on the described clamp body sidewall and on the front end face, on the described tapped through hole sealing screw is housed.
Described radial conduit under fluid pressure is with vertically the infall of conduit under fluid pressure and the infall of vertical conduit under fluid pressure and transverse hydraulic pipeline are rounding off.
Described outer expanding sleeve and clamp body adopt interference assembling, magnitude of interference 0.03-0.05mm.
Described outer expanding sleeve adopts the spring steel of vacuum modifier treatment.
Described clamp body rear end is suitable by flange end and machine tool chief axis, fit clearance 0.005mm.
Technique effect of the present invention:
The hydraulically operated fixture that is used for the little taper hole of machining spindle provided by the invention, be that a kind of external-expanding type has the hydraulically operated fixture that radiation clamps function, realization with car for mill, solved the problem of main shaft bearing shelves and main shaft conelet hole axiality, improved the accuracy of manufacture of the core part main shaft on the high-speed electric main shaft, described high-speed electric main shaft is the core component of high-speed numeric control lathe.Specifically, described hydraulically operated fixture mainly comprises clamp body, outer expanding sleeve and can be to the radial conduit under fluid pressure system that the outer expanding sleeve inwall is evenly exerted pressure, clamp body is connected with the main shaft of numerically controlled lathe, outer expanding sleeve is the coaxial assembling of interference with clamp body, radial conduit under fluid pressure system comprises with the outer expanding sleeve being that center homogeneous radiation shape distributes, the radial conduit under fluid pressure that bore is identical, fill special gel plastics in the pipeline, radial conduit under fluid pressure system can exert pressure to the outer expanding sleeve inwall equably, clamping force evenly is delivered to the ringfeder inwall simultaneously, guarantee that the ringfeder thin-walled inwardly shrinks simultaneously, clamping work pieces, when guaranteeing fastening part main shaft to be processed, guaranteed that again part main shaft to be processed is coaxial with clamp body.From design details, outer expanding sleeve adopts the modifier treatment of spring steel vacuum, has so both satisfied the strain requirement of outer expanding sleeve, has reduced anchor clamps distortion itself again, thereby has improved the clamping accuracy of anchor clamps and prolonged the anchor clamps life-span; The outer expanding sleeve size that also extended, outer expanding sleeve inwall middle part is the inside thin-wall construction of contraction distortion, the middle part that corresponding outer wall middle part surrounds the cylindric hydraulic cavities of outer expanding sleeve inwall thin-wall construction has the annulus projection, form " B " font cavity structure, make the pressure transmission more even like this, guarantee to clamp more stable; And the design of the slyness of pipeline infall has reduced the resistance that the gel plastics move.From the overall technology effect, the present invention also has following remarkable advantage: (1) production efficiency height.(2) production cost is low.(3) utilize numerically controlled lathe to replace numerically control grinder, realize with car for mill.Through actual detected, on the accurate digital control lathe, utilize special fixture of the present invention, in conjunction with reasonably cutter selection, the little taper hole of processing and bearing guard axiality are in 0.0015, and surface roughness Ra reaches 0.4, can meet design requirement fully, realized on numerically controlled lathe that with car for mill, production efficiency improves more than three times, production cost has only original 1/8th.
Description of drawings
Fig. 1 is the present invention's part schematic diagram to be processed.
Fig. 2 is the stereogram that the present invention is used for the hydraulically operated fixture of the little taper hole of machining spindle.
Fig. 3 be Fig. 2 along central longitudinal to generalized section.
Fig. 4 is that Fig. 3 is along the A-A generalized section.
Reference numeral lists as follows: 1-clamp body, 2-pinching screw, 3-outer expanding sleeve, the 4-sealing screw, 5-conduit under fluid pressure system, 11-cavity, 12-pipeline intercommunicating pore, the 21-plunger, 31-outer expanding sleeve hydraulic cavities, 32-annulus projection, the 41-tapped through hole, the radial conduit under fluid pressure of 51-, the vertical conduit under fluid pressure of 52-, 53-transverse hydraulic pipeline.
The specific embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
The objective of the invention is to provide a kind of external-expanding type that utilizes to have the hydraulically operated fixture that radiation clamps function, solve the difficult problem of the highly-efficient processing of the little taper hole of main shaft.To achieve these goals, the present invention proposes a kind of external-expanding type that utilizes and has the hydraulically operated fixture that radiation clamps function, and realization for mill, solves the difficult problem of the highly-efficient processing of the little taper hole of main shaft with car.
Fig. 1 is the part schematic diagram that the present invention will process.The port size of spindle taper hole is Φ 11 ± 0.05, and angle is 16 ° ± 30 ", surface roughness requires Ra0.8, taper hole to the axiality of bearing guard less than 0.002.
As Fig. 2, Fig. 3, shown in Figure 4, the present invention be used for the little taper hole of machining spindle hydraulically operated fixture embodiment stereogram and vertically with along the cutaway view of A-A section.Referring to Fig. 2, a kind of hydraulically operated fixture that is used for the little taper hole of machining spindle comprises clamp body 1, and clamp body 1 rear end is connected with the main shaft of accurate digital control lathe is coaxial, and clamp body front end and clamp body coaxial package are useful on the outer expanding sleeve 3 that clamps part to be processed.Have pinching screw 2 and sealing screw 4 on the sidewall of clamp body 1.Referring to Fig. 3, Fig. 4, comprise equably the radial conduit under fluid pressure system 5 that exerts pressure to outer expanding sleeve 3 inwalls in described clamp body 1, described radial conduit under fluid pressure system 5 comprises that with the outer expanding sleeve central axis be middle mind-set clamp body sidewall homogeneous radiation and some radial conduit under fluid pressure 51 that bore is identical.In the present embodiment, the front end of clamp body 1 is drilled with the cylindrical cavity 11 coaxial with clamp body that inserts part to be processed, the cavity inner wall coaxial package is useful on the outer expanding sleeve 3 that clamps part to be processed, described outer expanding sleeve 3 inwalls middle part is the inside thin-wall construction of contraction distortion, corresponding outer wall middle part has the cylindric hydraulic cavities 31 of surrounding outer expanding sleeve inwall thin-wall construction, and the middle part of described cylindric hydraulic cavities 31 has annulus projection 32; Described radial conduit under fluid pressure 51 is communicated with hydraulic cavities 31 in annulus projection corresponding position perpendicular to the hydraulic cavities outer wall.Described radial conduit under fluid pressure system 5 comprise four be communicated with the outer expanding sleeve hydraulic cavities radial conduit under fluid pressure 51, article four, radial conduit under fluid pressure 51 connects respectively and is parallel to outer expanding sleeve and extands rearward to the clamp body rear portion and four vertical conduit under fluid pressures 52 that equate with the outer expanding sleeve vertical range, and described four vertical conduit under fluid pressures intersect the transverse hydraulic pipelines 53 that are communicated with mutually with vertical two of four vertical conduit under fluid pressures and are interconnected by what be positioned at the clamp body rear portion; Clamp body bottom center position inwardly is drilled with column pipeline intercommunicating pore 12, and transverse hydraulic pipeline 53 intersects connection mutually at pipeline intercommunicating pore place, and the position of the corresponding pipeline intercommunicating pore in clamp body bottom surface has tapped through hole 41, and sealing screw 4 is housed on the tapped through hole; Plunger 21 is set on the sidewall of described clamp body, and described plunger inwardly is connected to from sidewall on the outer wall of pipeline intercommunicating pore 12, and the pinching screw 2 of the application of force is installed on the plunger 21; Only need tighten pinching screw during clamping, clamping force is transmitted to horizontal conduit under fluid pressure 53, vertical conduit under fluid pressure 52, radial conduit under fluid pressure 51 successively by the outer wall of pipeline intercommunicating pore 12, evenly be delivered to simultaneously the outer expanding sleeve inwall, guarantee that the outer expanding sleeve inwall inwardly shrinks clamping work pieces simultaneously.Have tapped through hole 41 corresponding to radial conduit under fluid pressure and the infall of vertical conduit under fluid pressure and the infall of vertical conduit under fluid pressure and transverse hydraulic pipeline on the clamp body sidewall and on the front end face, sealing screw 4 is housed on the described tapped through hole.For the clamping accuracy that improves anchor clamps improves the anchor clamps life-span, reduce anchor clamps distortion itself, outer expanding sleeve adopts the modifier treatment of spring steel 65Mn vacuum, satisfy the strain requirement of outer expanding sleeve, on the other hand for making clamping accuracy higher, more stable, the outer expanding sleeve of the present invention size that extended, the middle part that the outer wall middle part surrounds the cylindric hydraulic cavities of outer expanding sleeve inwall thin-wall construction has the annulus projection, forms " B " font cavity structure; Adopt " B " font cavity structure, guarantee to clamp more stable.Outer expanding sleeve and clamp body adopt the interference assembling, magnitude of interference 0.03-0.05mm, the outer expanding sleeve endoporus need stay the 2mm surplus at least, treat anchor clamps and lathe spindle assemble after right boring endoporus again, the assurance anchor clamps are coaxial with lathe spindle; Fill with special gel plastics in the hydraulic tube, radial conduit under fluid pressure is processed into rounding off with the infall of vertical conduit under fluid pressure and the infall of vertical conduit under fluid pressure and transverse hydraulic pipeline, to reduce the resistance that the gel plastics move.Clamp body 1 adopts that 45 steel are modified to process, and its flange end and machine tool chief axis match, fit clearance 0.005mm, for reducing anchor clamps because of the influence of the uneven vibration that produces of Mass Distribution to machined surface quality, anchor clamps finish at assembly and adjustment need carry out the dynamic balancing processing, and balance quality is undertaken by G1.
More than open is instantiation of the present invention only, but the present invention is not limited thereto.Should be pointed out that the above specific embodiment can make those skilled in the art more fully understand the invention, but do not limit the present invention in any way creation.Therefore, although this specification and embodiment have been described in detail to the invention,, it will be appreciated by those skilled in the art that still and can make amendment or be equal to replacement the invention; And all do not break away from the technical scheme and the improvement thereof of the spirit and scope of the present invention, and it all is encompassed in the middle of the protection domain of the invention patent.
Claims (10)
1. hydraulically operated fixture that is used for the little taper hole of machining spindle, it is characterized in that, comprise clamp body, described clamp body rear end is connected with the accurate digital control lathe spindle is coaxial, described clamp body front end and clamp body coaxial package are useful on the outer expanding sleeve that clamps part to be processed, comprise the radial conduit under fluid pressure system that evenly exerts pressure to the outer expanding sleeve inwall in described clamp body, described radial conduit under fluid pressure system comprises that with the outer expanding sleeve central axis be homogeneous radiation and the some radial conduit under fluid pressure that bore is identical of middle mind-set clamp body sidewall.
2. the hydraulically operated fixture that is used for the little taper hole of machining spindle according to claim 1, it is characterized in that, described outer expanding sleeve inwall middle part is the inside thin-wall construction of contraction distortion, corresponding outer wall middle part has the cylindric hydraulic cavities of surrounding outer expanding sleeve inwall thin-wall construction, and the middle part of described cylindric hydraulic cavities has the annulus projection; Described radial conduit under fluid pressure is communicated with hydraulic cavities in annulus projection corresponding position perpendicular to the hydraulic cavities outer wall.
3. the hydraulically operated fixture that is used for the little taper hole of machining spindle according to claim 2, it is characterized in that, described radial conduit under fluid pressure system comprises four radial conduit under fluid pressures that are communicated with the cylindric hydraulic cavities of outer expanding sleeve, article four, radial conduit under fluid pressure connects respectively and is parallel to outer expanding sleeve and extands rearward to the clamp body rear portion and four vertical conduit under fluid pressures that equate with the outer expanding sleeve vertical range, and described four vertical conduit under fluid pressures intersect the transverse hydraulic pipelines that are communicated with mutually with vertical two of four vertical conduit under fluid pressures and are interconnected by what be positioned at the clamp body rear portion.
4. the hydraulically operated fixture that is used for the little taper hole of machining spindle according to claim 3, it is characterized in that, described clamp body bottom center position inwardly is drilled with column pipeline intercommunicating pore, described transverse hydraulic pipeline intersects connection mutually at pipeline intercommunicating pore place, the position of the corresponding pipeline intercommunicating pore in clamp body bottom surface has tapped through hole, and sealing screw is housed on the tapped through hole.
5. the hydraulically operated fixture that is used for the little taper hole of machining spindle according to claim 4 is characterized in that, on the sidewall of described clamp body plunger is set, and described plunger inwardly is connected on the pipeline intercommunicating pore outer wall from sidewall, and the pinching screw of the application of force is installed on the plunger.
6. the hydraulically operated fixture that is used for the little taper hole of machining spindle according to claim 3, it is characterized in that, have tapped through hole corresponding to radial conduit under fluid pressure and the infall of vertical conduit under fluid pressure and the infall of vertical conduit under fluid pressure and transverse hydraulic pipeline on the described clamp body sidewall and on the front end face, on the described tapped through hole sealing screw is housed.
7. the hydraulically operated fixture that is used for the little taper hole of machining spindle according to claim 3 is characterized in that, described radial conduit under fluid pressure is with vertically the infall of conduit under fluid pressure and the infall of vertical conduit under fluid pressure and transverse hydraulic pipeline are rounding off.
8. the hydraulically operated fixture that is used for the little taper hole of machining spindle according to claim 2 is characterized in that, described outer expanding sleeve adopts the spring steel of vacuum modifier treatment.
9. the hydraulically operated fixture that is used for the little taper hole of machining spindle according to claim 8 is characterized in that, described outer expanding sleeve and clamp body adopt interference assembling, magnitude of interference 0.03-0.05mm.
10. the hydraulically operated fixture that is used for the little taper hole of machining spindle according to claim 1 is characterized in that, described clamp body rear end is suitable by flange end and machine tool chief axis, fit clearance 0.005mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110089280.4A CN102161162B (en) | 2011-04-08 | 2011-04-08 | Hydraulic clamp for processing spindle taper hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110089280.4A CN102161162B (en) | 2011-04-08 | 2011-04-08 | Hydraulic clamp for processing spindle taper hole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102161162A true CN102161162A (en) | 2011-08-24 |
| CN102161162B CN102161162B (en) | 2014-03-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110089280.4A Expired - Fee Related CN102161162B (en) | 2011-04-08 | 2011-04-08 | Hydraulic clamp for processing spindle taper hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102161162B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106271783A (en) * | 2016-08-31 | 2017-01-04 | 成都凯赛尔电子有限公司 | A kind of device and method of processing stainless steel thin wall cylinder inner circle |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3516681A (en) * | 1968-05-16 | 1970-06-23 | Balas Collet Co | Hydraulic chuck or arbor |
| US5141370A (en) * | 1990-12-06 | 1992-08-25 | Carrier Corporation | High precision tool holder |
| US5516243A (en) * | 1995-01-03 | 1996-05-14 | Hydra-Lock Corporation | Reamer chuck and tool expander |
| CN2688444Y (en) * | 2004-04-09 | 2005-03-30 | 张重阳 | Hydraulic high-precision centering clamp chuck |
| CN201659445U (en) * | 2010-03-03 | 2010-12-01 | 天津市中马骏腾精密机械制造有限公司 | Hydraulic chuck tool |
| CN201988973U (en) * | 2011-04-08 | 2011-09-28 | 常州合泰微特电机有限公司 | Hydraulic fixture for machining small taper hole of main shaft |
-
2011
- 2011-04-08 CN CN201110089280.4A patent/CN102161162B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3516681A (en) * | 1968-05-16 | 1970-06-23 | Balas Collet Co | Hydraulic chuck or arbor |
| US5141370A (en) * | 1990-12-06 | 1992-08-25 | Carrier Corporation | High precision tool holder |
| US5516243A (en) * | 1995-01-03 | 1996-05-14 | Hydra-Lock Corporation | Reamer chuck and tool expander |
| CN2688444Y (en) * | 2004-04-09 | 2005-03-30 | 张重阳 | Hydraulic high-precision centering clamp chuck |
| CN201659445U (en) * | 2010-03-03 | 2010-12-01 | 天津市中马骏腾精密机械制造有限公司 | Hydraulic chuck tool |
| CN201988973U (en) * | 2011-04-08 | 2011-09-28 | 常州合泰微特电机有限公司 | Hydraulic fixture for machining small taper hole of main shaft |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106271783A (en) * | 2016-08-31 | 2017-01-04 | 成都凯赛尔电子有限公司 | A kind of device and method of processing stainless steel thin wall cylinder inner circle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102161162B (en) | 2014-03-12 |
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Owner name: JIANGSU DETAI PRECISION ELECTROMECHANICAL CO., LTD Free format text: FORMER OWNER: CHANGZHOU HETAI WEITE ELECTRICAL MACHINERY CO., LTD. Effective date: 20120420 |
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Effective date of registration: 20120420 Address after: 213011 Jiangsu Province, Changzhou city Qishuyan District North Qin new industrial zone of Thailand in the motor Applicant after: Jiangsu Detai Precision Electromachanical Co., Ltd. Address before: 213011, Changzhou, Jiangsu, Qishuyan Province, No. 108 Beiyang Road Applicant before: Changzhou Hetai Motor Co., Ltd. |
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Effective date of registration: 20151009 Address after: 213000, Jiangsu Wujin District, Changzhou province observation Town, Qin San village industrial concentration area Patentee after: Changzhou Hetai electrical Limited by Share Ltd Address before: 213011 Jiangsu Province, Changzhou city Qishuyan District North Qin new industrial zone of Thailand in the motor Patentee before: Jiangsu Detai Precision Electromachanical Co., Ltd. |
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Granted publication date: 20140312 Termination date: 20200408 |