CN211029594U - Clamp for superfinishing outer side wall of bearing inner ring - Google Patents
Clamp for superfinishing outer side wall of bearing inner ring Download PDFInfo
- Publication number
- CN211029594U CN211029594U CN201922070396.8U CN201922070396U CN211029594U CN 211029594 U CN211029594 U CN 211029594U CN 201922070396 U CN201922070396 U CN 201922070396U CN 211029594 U CN211029594 U CN 211029594U
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- bearing inner
- clamp
- superfinishing
- pieces
- screw rod
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- 230000002093 peripheral effect Effects 0.000 claims description 17
- 229920002635 polyurethane Polymers 0.000 claims description 10
- 239000004814 polyurethane Substances 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
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- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The utility model relates to a bearing inner race lateral wall superfinishing anchor clamps, it includes the anchor clamps body, sets firmly the location axle in anchor clamps body one end, a plurality of setting up in the outside of anchor clamps body circumference piece that rises, set up the link gear between a plurality of pieces that rise and anchor clamps body; the positioning shaft is connected with a rotating part of the superfinishing machine tool; the plurality of tensioning pieces are uniformly distributed along the circumferential direction of the positioning shaft; the linkage mechanism is used for driving the plurality of tensioning pieces to synchronously move along the radial direction of the positioning shaft. The bearing inner ring tensioning device has the advantages that the radial tensioning force which is uniformly distributed is provided for the bearing inner ring by controlling the plurality of tensioning pieces, the bearing inner ring is fixed on the clamp, the movement range of the tensioning pieces is changed, so that the clamp can fix the bearing inner rings with various sizes and models, the clamp does not need to be frequently replaced, the operation is simple and convenient, and the production cost of the bearing is reduced.
Description
Technical Field
The utility model belongs to the technical field of the bearing superfinishing technique and specifically relates to a bearing inner race lateral wall superfinishing's anchor clamps are related to.
Background
The bearing is an important part in modern mechanical equipment, and is mainly used for supporting a mechanical rotating body, reducing the friction coefficient during movement and ensuring the rotation precision of machinery. The bearing mainly comprises a bearing inner ring, a bearing outer ring and a rolling or sliding part arranged between the bearing inner ring and the bearing outer ring. In order to ensure the precision requirement of the bearing, the outer side wall of the bearing inner ring and the inner side wall of the bearing outer ring are superfinished to improve the roughness of contact surfaces between rolling elements or sliding elements and the inner side wall and the outer side wall of the bearing.
The superfinishing of the bearing inner ring is a finishing method which applies small pressure to the outer side wall of the bearing inner ring by adopting a fine-grained grinding tool and performs short-stroke reciprocating vibration and slow relative feeding motion so as to realize micro grinding. When the outer side wall of the bearing inner ring is superfinished at the present stage, a special clamp is needed to be matched for use, the clamp is installed on a rotating part of a superfinishing machine tool firstly, the rotating part of the superfinishing machine tool drives the clamp and the bearing inner ring to rotate simultaneously, and then a grinding tool is used for grinding the bearing inner ring.
The existing bearing inner ring clamp can only be suitable for bearing inner rings of the same size and model, when bearing inner rings of other models are processed, the clamp needs to be replaced, the process is complex, and the production cost of the bearing is correspondingly improved by using various clamps.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims at providing a bearing inner race lateral wall superfinishing's anchor clamps, the bearing inner race of its applicable multiple size model, the bearing inner race of processing other models makes and need not change anchor clamps, and easy operation is convenient to the manufacturing cost of bearing has been reduced.
The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:
a clamp for superfinishing the outer side wall of a bearing inner ring comprises a clamp body, a positioning shaft fixedly arranged at one end of the clamp body, a plurality of expanding pieces arranged on the circumferential outer side of the clamp body, and a linkage mechanism arranged between the plurality of expanding pieces and the clamp body;
the positioning shaft is connected with a rotating part of the superfinishing machine tool;
the plurality of tensioning pieces are uniformly distributed along the circumferential direction of the positioning shaft;
the linkage mechanism is used for driving the plurality of tensioning pieces to synchronously move along the radial direction of the positioning shaft.
Through adopting above-mentioned technical scheme, establish bearing inner race cover on the anchor clamps body, and make a plurality of tight pieces that rise be located the inside of bearing inner race, drive a plurality of tight pieces that rise through link gear and move to keeping away from anchor clamps body direction along the radial of anchor clamps body, when a plurality of tight pieces that rise all contact with the inside wall of bearing inner race, a plurality of tight pieces that rise provide a radial tension to the bearing inner race, the bearing inner race can't remove under the effect of a plurality of radial tension, thereby fix the bearing inner race on anchor clamps, and the axis after the bearing inner race is fixed and the axis of location axle, the gyration precision when having guaranteed the bearing inner race to add man-hour. The inner rings of the bearings in various sizes and models can be fixed by the clamp by controlling the motion range of the expansion pieces, the clamp does not need to be frequently replaced, the operation is simple and convenient, and the production cost of the bearing is reduced.
The present invention may be further configured in a preferred embodiment as: the tensioning piece is arranged in a cylindrical shape, and the axis of the tensioning piece is parallel to the axis of the positioning shaft.
By adopting the technical scheme, the tensioning member is cylindrical, so that the contact area of the tensioning member and the inner side wall of the bearing inner ring can be reduced, and the phenomenon that the inner side wall of the tensioning member is scratched when the tensioning member and the bearing inner ring are reduced.
The present invention may be further configured in a preferred embodiment as: and a polyurethane sleeve is sleeved on the peripheral surface of the tensioning piece.
By adopting the technical scheme, the polyurethane sleeve is made of the polyurethane material, the hardness is low, the polyurethane sleeve replaces the tensioning piece to be in contact with the inner side wall of the bearing inner ring, and the phenomenon that the inner side wall of the bearing inner ring is scratched is further reduced.
The present invention may be further configured in a preferred embodiment as: the linkage mechanism comprises a screw rod sleeved in the clamp body, a sliding sleeve in threaded connection with the outer peripheral surface of the screw rod, a plurality of connecting pieces in one-to-one correspondence with the plurality of tensioning pieces and a limiting assembly arranged on one side of the plurality of tensioning pieces;
the axial line of the screw is superposed with the axial line of the positioning axial line, and two axial ends of the screw are respectively in rotary connection with the clamp body;
the connecting piece comprises two connecting rods, one end of each connecting rod is hinged with the outer side wall of the sliding sleeve, the other end of each connecting rod is hinged with the tensioning piece, and arcs of the two connecting rods are parallel to each other;
the limiting assembly is used for limiting the tension member to move only along the axial direction of the positioning shaft.
Through adopting above-mentioned technical scheme, the screw rod rotates, the screw rod drives the sliding sleeve and removes along its axis, the sliding sleeve moves to tight one side that rises, drive two connecting rods and remove simultaneously, the tight piece that rises can not move along its axial under spacing subassembly's effect, so the connecting rod can take place to rotate when moving, because two connecting rods are parallel to each other, the tight piece that rises, a parallelogram is constituteed with the sliding sleeve to drive the tight piece that rises along the radial movement of anchor clamps body, and its axis keeps parallel with the axis of anchor clamps body in the removal process, and then rise tightly on anchor clamps with the bearing inner race.
The present invention may be further configured in a preferred embodiment as: the limiting assembly comprises a positioning plate sleeved on the outer peripheral surface of the clamp body, a plurality of limiting grooves are formed in the positioning plate, one end of the tensioning piece is located in the limiting grooves to slide, two limiting plates are fixedly arranged on the outer peripheral surface of the tensioning piece, and the positioning plate is located between the two limiting plates and is abutted to the two limiting plates.
Through adopting above-mentioned technical scheme, two limiting plates are located the both sides of locating plate, make the unable its axial displacement of tight piece that rises to make the connecting rod drive the tight piece that rises and move along the direction of spacing groove.
The present invention may be further configured in a preferred embodiment as: the inside direction subassembly that is provided with of anchor clamps body.
Through adopting above-mentioned technical scheme, the direction subassembly is used for providing a guiding force for the sliding sleeve, prevents that the sliding sleeve from following the rotation of screw rod and rotating.
The present invention may be further configured in a preferred embodiment as: the guide assembly comprises a guide block fixedly arranged on the peripheral surface of the sliding sleeve and a guide rod arranged on one side of the screw in the radial direction;
the guide block is positioned between two adjacent connecting pieces;
the axis of guide bar is parallel with the axis of screw rod, the axial both ends of screw rod respectively with anchor clamps body fixed connection, the screw rod runs through the guide block and is connected rather than sliding.
Through adopting above-mentioned technical scheme, when the screw rod rotated, the sliding sleeve can not follow the screw rod and rotate along its axis together under the effect of guide block and guide bar, can only along the axial motion of guide bar, along the axial motion of screw rod promptly, more steady when making the sliding sleeve remove.
The present invention may be further configured in a preferred embodiment as: one end of the screw rod, which is far away from the positioning shaft, penetrates through the clamp body and is fixedly provided with a knob.
Through adopting above-mentioned technical scheme, the knob is convenient for operating personnel to rotate the screw rod with the hand to the knob does not interfere the use of location axle.
To sum up, the utility model discloses a following at least one useful technological effect:
1. the bearing inner rings are fixed on the clamp by controlling the plurality of tensioning members and providing uniformly distributed radial tensioning force for the bearing inner rings, and the movement range of the tensioning members is changed, so that the clamp can fix the bearing inner rings with various sizes and models, the clamp does not need to be frequently replaced, the operation is simple and convenient, and the production cost of the bearing is reduced;
2. the tensioning piece is arranged to be a cylinder with the axis parallel to the axis of the positioning shaft, so that the contact area of the tensioning piece and the inner side wall of the bearing inner ring is reduced, the axis of the bearing inner ring is overlapped with the axis of the positioning shaft after the bearing inner ring is fixed on the clamp, the rotation precision of the bearing inner ring is ensured, the polyurethane sleeve is used for replacing the tensioning piece to be in contact with the bearing inner ring, and the phenomenon that the tensioning piece scratches the inner side wall of the bearing inner ring is further reduced;
3. the motion of a plurality of tightening pieces that rise is controlled simultaneously through the cooperation of sliding sleeve, screw rod and connecting rod, makes the operation of anchor clamps more convenient to use two connecting rods that are parallel to each other, make its axis of tightening piece and location axle axis keep the parallel state always when the motion.
Drawings
FIG. 1 is a schematic structural view of an embodiment;
fig. 2 is a sectional view showing the link mechanism.
In the figure, 1, a clamp body; 2. positioning the shaft; 3. a tensioning member; 31. a polyurethane sleeve; 4. a linkage mechanism; 41. a screw; 42. a knob; 43. a sliding sleeve; 44. a connecting rod; 45. a limiting component; 451. positioning a plate; 452. a limiting plate; 46. a guide assembly; 461. a guide block; 462. a guide rod.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, for the utility model discloses a bearing inner race lateral wall superfinishing's anchor clamps, including anchor clamps body 1, anchor clamps body 1 is inside hollow cylinder setting, and 1 axial one end of anchor clamps body has set firmly location axle 2, the axis of location axle 2 and the coincidence of the axis of anchor clamps body 1. One side that the location axle 2 was kept away from to anchor clamps body 1 is provided with four and rises tight piece 3, and four are risen tight piece 3 along the circumference evenly distributed of anchor clamps body 1, and rise tight piece 3 and anchor clamps body 1 and set up along furniture body's radial interval, rise tight piece 3 and set up to the cylinder, and the axis that rises tight piece 3 is parallel with the axis of anchor clamps body 1. And a linkage mechanism 4 is arranged between the four tensioning members 3 and the clamp body 1, and the linkage mechanism 4 can drive the four tensioning assemblies to synchronously move along the radial direction of the clamp body 1. Will fix a position the axle 2 and be connected with the rotary part on the super smart lathe, establish bearing inner race cover on anchor clamps body 1 to make four the inside that rises the retainer plate 3 and be located the bearing inner race, drive four through link gear 4 and rise the retainer plate 3 and do the direction motion of keeping away from anchor clamps body 1 along the radial of anchor clamps body 1, thereby make four rise the retainer plate 3 and simultaneously inconsistent with the inside wall of bearing inner race, provide four radial tension force that rises to the inside wall of bearing inner race, and then fix the bearing inner race on anchor clamps. The outer peripheral face of the tensioning piece 3 is sleeved with the polyurethane sleeve 31, the polyurethane sleeve 31 replaces the tensioning piece 3 to be in contact with the inner side wall of the bearing inner ring, and the polyurethane sleeve 31 is made of soft materials, so that the inner side wall of the bearing inner ring is protected from being scratched by the tensioning piece 3. The rotating part of super smart machine drives anchor clamps body 1 through location axle 2 and rotates along its self axis, and the bearing inner race rotates along anchor clamps body 1 under four effects that rise the piece 3, reuses the grinding apparatus to carry out super-finishing to the lateral wall of bearing inner race.
Referring to fig. 2, the linkage mechanism 4 includes a screw rod 41 disposed inside the fixture body 1, an axis of the screw rod 41 coincides with an axis of the fixture body 1, two axial ends of the screw rod 41 are rotatably connected to two axial side walls of the fixture body 1, and one end of the screw rod 41, which is far away from the positioning shaft 2, penetrates through the circumferential side wall of the fixture body 1 and is fixedly provided with a knob 42, and the knob 42 controls the rotation of the screw rod 41. The peripheral face of screw rod 41 is equipped with the sliding sleeve 43 in a cover manner, and the axis of sliding sleeve 43 coincides with the axis of screw rod 41, and sliding sleeve 43 and screw rod 41 threaded connection, sliding sleeve 43 is located the one end that screw rod 41 kept away from the piece 3 that rises. Four connecting pieces are arranged on the peripheral surface of the sliding sleeve 43, and the four connecting pieces correspond to the four expansion pieces 3 one by one. The connecting piece includes two connecting rods 44, and the one end of connecting rod 44 length direction is articulated with the outer peripheral face of sliding sleeve 43, and the one end that connecting rod 44 kept away from sliding sleeve 43 runs through the lateral wall of anchor clamps body 1 circumference, and is articulated with the one side that rises the peripheral face of 3 and is close to anchor clamps body 1.
Referring to fig. 1 and 2, the linkage mechanism 4 further includes a limiting assembly 45, and the limiting assembly 45 is used for limiting the movement of the plurality of tensioning members 3, so that the tensioning members 3 can only move along the radial direction of the clamp body 1. The limiting assembly 45 comprises a positioning plate 451 arranged on one side, close to the positioning shaft 2, of the tensioning member 3, the positioning plate 451 is an annular plate, and the positioning plate 451 is sleeved on the outer peripheral surface of the clamp body 1 and is fixedly connected with the clamp body. Four guide grooves are formed in the positioning plate 451 and are arranged along the radial direction of the positioning plate 451, the four guide grooves correspond to the four tensioning pieces 3 one by one, and one axial end of each tensioning piece 3 is located in each guide groove to slide. Rising chucking member 3 has set firmly limiting plate 452 respectively in the axial both sides of locating plate 451, and locating plate 451 is located between two limiting plates 452, and the axial both ends of locating plate 451 offset with two limiting plates 452 respectively.
Referring to fig. 2, the interior of the jig body 1 is provided with a guide assembly 46, and the guide assembly 46 is used to prevent the sliding sleeve 43 from rotating with the rotation of the screw 41. The guide assembly 46 includes four guide blocks 461 disposed on the outer peripheral surface of the sliding sleeve 43, the four guide blocks 461 are uniformly distributed along the axial direction of the sliding sleeve 43, and the guide blocks 461 and the connecting members are disposed at intervals along the axial direction of the sliding sleeve 43. Four guide rods 462 are arranged inside the clamp body 1, the axes of the guide rods 462 are parallel to the axial direction of the screw rod 41, and the two axial ends of the guide rods 462 are fixedly connected with the two axial side walls of the clamp body 1 respectively. The guide rods 462 and the screw rod 41 are arranged at intervals along the radial direction of the screw rod 41, the sliding sleeve 43 is located between the guide rods 462 and the screw rod 41, the four guide rods 462 are uniformly distributed along the circumferential direction of the screw rod 41, the four guide rods 462 correspond to the four guide blocks 461 one by one, and the guide rods 462 penetrate through the guide blocks 461 and are connected with the guide blocks 461 in a sliding manner.
The utility model discloses a theory of operation: the screw 41 is rotated by the knob 42, the sliding sleeve 43 moves to one side of the tightening member 3 along the axis of the screw 41 under the restriction of the guide rod 462, the two connecting rods 44 move together along the sliding sleeve 43, and because the tightening member 3 cannot move along the axial direction of the screw 41 along with the connecting rods 44 under the restriction of the restriction plate 452, the two connecting rods 44 can rotate upwards, so that the tightening member 3 is pushed to move along the guide groove in the direction away from the clamp body 1, and the two connecting rods 44 are kept parallel, so that the tightening member 3 cannot incline in the moving process. The four expanding pieces 3 simultaneously provide expanding force along the radial direction to the inner side wall of the bearing inner ring, so that the bearing is fixed on the clamp, and the connecting rods 44 connected on the four expanding pieces 3 are the same in size, so that the moving distances of the four expanding pieces 3 are the same, and the coincidence of the axis of the bearing inner ring and the axis of the clamp body 1 is ensured. It plays fixed action to the bearing inner race through four tight pieces 3 that rise, and four are stretched the moving distance that tight piece 3 that rises and are controlled by the moving distance of sliding sleeve 43 on screw rod 41, and the motion range that rises tight piece 3 is great, can fix the bearing inner race of multiple model size on anchor clamps to guaranteed the gyration precision of bearing inner race when super finishing, improved the practicality of bearing inner race anchor clamps.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (8)
1. The utility model provides a bearing inner race lateral wall superfinishing's anchor clamps which characterized in that: the clamp comprises a clamp body (1), a positioning shaft (2) fixedly arranged at one end of the clamp body (1), a plurality of expanding pieces (3) arranged on the circumferential outer side of the clamp body (1), and a linkage mechanism (4) arranged between the plurality of expanding pieces (3) and the clamp body (1);
the positioning shaft (2) is connected with a rotating part of the superfinishing machine tool;
the plurality of tensioning pieces (3) are uniformly distributed along the circumferential direction of the positioning shaft (2);
the linkage mechanism (4) is used for driving the plurality of tensioning pieces (3) to synchronously move along the radial direction of the positioning shaft (2).
2. The clamp for superfinishing the outer side wall of the bearing inner race according to claim 1, wherein: the tensioning piece (3) is arranged in a cylindrical shape, and the axis of the tensioning piece (3) is parallel to the axis of the positioning shaft (2).
3. The clamp for superfinishing the outer side wall of the bearing inner race according to claim 2, wherein: the outer peripheral surface of the tensioning piece (3) is sleeved with a polyurethane sleeve (31).
4. The clamp for superfinishing the outer side wall of the bearing inner race according to claim 1, wherein: the linkage mechanism (4) comprises a screw rod (41) sleeved in the clamp body (1), a sliding sleeve (43) in threaded connection with the outer peripheral surface of the screw rod (41), a plurality of connecting pieces in one-to-one correspondence with the plurality of expanding pieces (3), and a limiting assembly (45) arranged on one side of the plurality of expanding pieces (3);
the axis of the screw rod (41) is superposed with the axis of the positioning shaft (2), and two axial ends of the screw rod (41) are respectively in rotary connection with the clamp body (1);
the connecting piece comprises two connecting rods (44), one end of each connecting rod (44) is hinged with the outer side wall of the sliding sleeve (43), the other end of each connecting rod (44) is hinged with the tensioning piece (3), and arcs of the two connecting rods (44) are parallel to each other;
the limiting assembly (45) is used for limiting the expansion piece (3) to move only along the axial direction of the positioning shaft (2).
5. The clamp for superfinishing the outer side wall of the bearing inner race according to claim 4, wherein: spacing subassembly (45) establish locating plate (451) on anchor clamps body (1) outer peripheral face including the cover, a plurality of spacing grooves have been seted up on locating plate (451), the one end that rises chucking piece (3) is located the spacing inslot and slides, two limiting plate (452) have set firmly on the outer peripheral face that rises chucking piece (3), locating plate (451) are located between two limiting plate (452) and offset with two limiting plate (452).
6. The clamp for superfinishing the outer side wall of the bearing inner race according to claim 4, wherein: the fixture body (1) is internally provided with a guide assembly (46).
7. The clamp for superfinishing the outer side wall of the bearing inner race according to claim 6, wherein: the guide assembly (46) comprises a guide block (461) fixedly arranged on the outer peripheral surface of the sliding sleeve (43) and a guide rod (462) arranged on one side of the screw rod (41) in the radial direction;
the guide block (461) is positioned between two adjacent connecting pieces;
the axis of the guide rod (462) is parallel to the axis of the screw rod (41), two axial ends of the screw rod (41) are fixedly connected with the clamp body (1) respectively, and the screw rod (41) penetrates through the guide block (461) to be connected with the guide block in a sliding mode.
8. The clamp for superfinishing the outer side wall of the bearing inner race according to claim 4, wherein: one end of the screw rod (41) far away from the positioning shaft (2) penetrates through the clamp body (1) and is fixedly provided with a knob (42).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922070396.8U CN211029594U (en) | 2019-11-25 | 2019-11-25 | Clamp for superfinishing outer side wall of bearing inner ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922070396.8U CN211029594U (en) | 2019-11-25 | 2019-11-25 | Clamp for superfinishing outer side wall of bearing inner ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211029594U true CN211029594U (en) | 2020-07-17 |
Family
ID=71543547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922070396.8U Expired - Fee Related CN211029594U (en) | 2019-11-25 | 2019-11-25 | Clamp for superfinishing outer side wall of bearing inner ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211029594U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112222971A (en) * | 2020-10-12 | 2021-01-15 | 宁波四捷精密科技有限公司 | Bearing surface equipment of polishing for bearing processing |
| CN114798938A (en) * | 2022-04-18 | 2022-07-29 | 浙江大学 | Straight pipe section internal-supporting external-clamping type clamping boosting device for bending and forming thin-wall pipe |
| CN115781436A (en) * | 2023-01-20 | 2023-03-14 | 常州纺兴精密机械有限公司 | High-performance carbon fiber spinneret plate surface finish machining device and method |
-
2019
- 2019-11-25 CN CN201922070396.8U patent/CN211029594U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112222971A (en) * | 2020-10-12 | 2021-01-15 | 宁波四捷精密科技有限公司 | Bearing surface equipment of polishing for bearing processing |
| CN112222971B (en) * | 2020-10-12 | 2022-05-20 | 宁波四捷精密科技有限公司 | Bearing surface equipment of polishing for bearing processing |
| CN114798938A (en) * | 2022-04-18 | 2022-07-29 | 浙江大学 | Straight pipe section internal-supporting external-clamping type clamping boosting device for bending and forming thin-wall pipe |
| CN115781436A (en) * | 2023-01-20 | 2023-03-14 | 常州纺兴精密机械有限公司 | High-performance carbon fiber spinneret plate surface finish machining device and method |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200717 |