CN114472948B - Chuck capable of achieving high concentricity through various combinations - Google Patents
Chuck capable of achieving high concentricity through various combinations Download PDFInfo
- Publication number
- CN114472948B CN114472948B CN202210079973.3A CN202210079973A CN114472948B CN 114472948 B CN114472948 B CN 114472948B CN 202210079973 A CN202210079973 A CN 202210079973A CN 114472948 B CN114472948 B CN 114472948B
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- shaft
- install
- mounting
- sleeve
- groove
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
- B23B31/16—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving radially
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gripping On Spindles (AREA)
- Jigs For Machine Tools (AREA)
Abstract
The invention discloses a chuck for realizing high concentricity by various combinations, which is characterized in that: the mounting plate is installed at the disk body top, the mounting plate bottom is connected with the installation cover, the main shaft connection pad is installed to the bottom of disk body, install the positioning disk in the main shaft connection pad, install the locating shaft in the locating disk, the locating shaft bottom is connected with the installation shaft, the pull rod is installed to the installation shaft, locating shaft top border is connected with a plurality of sloping blocks, the axle sleeve is installed at the locating shaft top, the hub connection has the connecting axle, the pull rod top is connected with the dabber, the dabber is connected with the centering sleeve, the apron is installed at the centering sleeve top, centering sleeve top border is equipped with a plurality of spouts, install the briquetting in the spout, the mounting plate is equipped with a plurality of mounting grooves at the border of centering sleeve, install joint bearing in the mounting groove, install the clamping axle in the joint bearing, the jack catch is installed to top one side of clamping axle, clamping axle bottom one side is equipped with assorted inclined plane in corresponding sloping block department, the clamping axle is equipped with the cotter in inclined plane department, install the locating pin in the cotter.
Description
Technical Field
The invention belongs to the technical field of chucks, and particularly relates to a chuck capable of achieving high concentricity through various combinations.
Background
The chuck is a mechanical device on a machine tool for clamping a workpiece. The workpiece is clamped and positioned by the radial movement of the movable claws uniformly distributed on the chuck body. The chuck is generally composed of a chuck body, movable claws and a claw driving mechanism 3, and is directly or through a flange plate connected with the end part of the main shaft of the machine tool. The chuck is usually installed on a lathe, a cylindrical grinder and an internal grinding machine and can be matched with various indexing devices for the milling machine and the drilling machine, but the existing domestic chuck is limited by clamping technology and structure, and needs to turn around and clamp for the second time when processing shaft parts, so that the processing precision, particularly the concentricity precision is affected, the processed parts are easy to generate errors, and the parts are scrapped.
Disclosure of Invention
In view of the above-mentioned problems with the background art, the present invention has as its object: it is intended to provide a chuck achieving high concentricity in various combinations.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
a chuck for achieving high concentricity in a plurality of combinations, characterized in that: the utility model discloses a novel structure of the disc body, which comprises a disc body, wherein a mounting disc is mounted at the top of the disc body, a mounting sleeve is connected at the bottom of the mounting disc, a main shaft connecting disc is mounted at the bottom of the disc body, a positioning disc is mounted in the main shaft connecting disc, a positioning shaft is mounted in the positioning disc, a mounting shaft is connected at the bottom of the positioning shaft, a pull rod is mounted in the mounting shaft, a plurality of inclined blocks are connected at the periphery of the top of the positioning shaft, the inclined blocks are uniformly distributed on the positioning shaft in a triangular shape, a shaft sleeve is mounted at the top of the positioning shaft, the mounting sleeve is mounted in the shaft sleeve, a connecting shaft is connected at the bottom of the shaft sleeve, the connecting shaft is mounted on the pull rod, the top of the pull rod is mounted in the mounting sleeve, a mandrel is connected with a centering sleeve, the centering sleeve is fixedly mounted at the top of the mounting disc, a cover plate is mounted at the top of the centering sleeve, the centering sleeve is characterized in that a plurality of sliding grooves are formed in the circumference of the top of the centering sleeve, the sliding grooves are uniformly arranged on the centering sleeve, a pressing block is arranged in the sliding grooves, an inclined surface is arranged on the inner side of the pressing block, a matched conical surface is arranged at the position corresponding to the inclined surface of the mandrel, a plurality of mounting grooves are formed in the circumference of the centering sleeve, the mounting grooves are uniformly arranged on the mounting plate in a triangular shape, a joint bearing is arranged in the mounting grooves, the top of the joint bearing is connected with a pressing cover, the pressing cover is fixedly arranged on the mounting plate, a clamping shaft is arranged in the joint bearing, a claw is arranged on one side of the top of the clamping shaft, a matched inclined surface is arranged at the position corresponding to the inclined block on one side of the bottom of the clamping shaft, a pin groove is formed in the inclined surface of the clamping shaft, and a positioning pin is arranged in the pin groove.
Further limited, a notch groove is formed in one side of the top of the clamping shaft, and the mounting claw is mounted in the notch groove in a locking mode through a screw. Such a structural design makes the installation more fixed.
Further limited, clamping axle bottom one side is equipped with the inner groovy, install positioning spring in the inner groovy, positioning spring's free end is connected with the reference column, the location end extrusion of reference column is on the inner wall of disk body. The structure design can enable the locating pin to tightly cling to the inclined plane of the inclined block.
Further limited, one side of the clamping shaft is provided with a matching groove, the shaft sleeve is provided with a matching block at the corresponding matching groove, and the matching block is arranged in the matching groove. Such structural design is convenient for drive the clamping axle and removes.
Further limited, the threaded rod is installed at the pull rod top, pull rod and threaded rod are integrated into one piece structure setting, dabber bottom is equipped with the internal thread groove in corresponding threaded rod department, the pull rod passes through threaded rod and dabber locking connection. The structure design makes the connection convenient and the connection is fixed.
Further defined, the pressing block is provided with a snap spring mounting groove, and a snap spring coil is mounted in the snap spring mounting groove. Such structural design plays quick reset's effect to the briquetting.
Further limited, the main shaft connection pad is equipped with first seal groove with the disk body contact surface, install first sealing washer in the first seal groove, the top of disk body is equipped with the second seal groove, install the second sealing washer in the second seal groove. Such a structural design provides a sealing effect.
Further defined, a locating pad is mounted on the top of the sleeve and is mounted on the bottom of the mounting plate. The structural design is convenient to install.
Further defined, a spring is connected to the bottom of the connecting shaft, and a free end of the spring is mounted on the upper side of the mounting shaft. Such structural design improves reset effect.
Further defined, the mounting plate and the mounting sleeve are provided as an integrally formed structure. The structural design is convenient for production and processing.
The beneficial effects of the invention are as follows: the invention has three combined actions, namely, the inner pressing block tightly supports the workpiece, the outer claw reciprocates in the axial direction and rotates through the joint bearing, and the stroke is formed in the radial direction to clamp the workpiece, so that the shaft workpiece can be clamped once and can be completely machined, the concentricity is high, the machining precision is ensured, the workpiece can be clamped once, the excircle of all the workpiece can be machined, and the concentricity of the workpiece can be within 0.005 mm.
Drawings
The invention can be further illustrated by means of non-limiting examples given in the accompanying drawings;
FIG. 1 is a schematic diagram of a chuck with high concentricity achieved by various combinations according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a chuck with high concentricity achieved by various combinations according to an embodiment of the present invention;
FIG. 3 is a schematic diagram showing the internal structure of a chuck for achieving high concentricity in various combinations according to the embodiment of the present invention;
the main reference numerals are as follows:
disc body 1, mounting disc 2, mounting sleeve 3, main shaft connection disc 4, positioning disc 5, positioning shaft 6, inclined block 601, mounting shaft 7, pull rod 8, shaft sleeve 9, connecting shaft 10, mandrel 11, centering sleeve 12, cover plate 13, chute 14, press block 15, joint bearing 16, gland 17, clamping shaft 18, claw 19, positioning pin 20, inner groove 21, positioning spring 22, positioning column 23, matching block 24, threaded rod 25, clamping spring mounting groove 26, first sealing groove 27, second sealing groove 28, positioning pad 29, and spring 30.
Detailed Description
In order that those skilled in the art will better understand the present invention, the following technical scheme of the present invention will be further described with reference to the accompanying drawings and examples.
As shown in fig. 1-3, a chuck for realizing high concentricity by multiple combinations of the invention is characterized in that a mounting plate 2 is mounted at the top of a plate body 1, a mounting sleeve 3 is connected at the bottom of the mounting plate 2, a main shaft connecting plate 4 is mounted at the bottom of the plate body 1, a positioning plate 5 is mounted in the main shaft connecting plate 4, a positioning shaft 6 is mounted in the positioning plate 5, a mounting shaft 7 is connected at the bottom of the positioning shaft 6, a pull rod 8 is mounted in the mounting shaft 7, a plurality of inclined blocks 601 are connected at the periphery of the top of the positioning shaft 6, the inclined blocks 601 are uniformly distributed on the positioning shaft 6 in a triangular shape, a shaft sleeve 9 is mounted at the top of the positioning shaft 6, the mounting sleeve 3 is mounted in the shaft sleeve 9, a connecting shaft 10 is connected at the bottom of the shaft sleeve 9, the connecting shaft 10 is mounted on the pull rod 8, the top of the pull rod 8 is mounted in the mounting sleeve 3, a mandrel 11 is connected at the top of the pull rod 8, and a centering sleeve 12 is connected at the mandrel 11, the centering sleeve 12 is fixedly arranged at the top of the mounting disc 2, the cover plate 13 is arranged at the top of the centering sleeve 12, a plurality of sliding grooves 14 are arranged on the periphery of the top of the centering sleeve 12, a plurality of sliding grooves 14 are uniformly arranged on the centering sleeve 12, a pressing block 15 is arranged in the sliding grooves 14, an inclined surface is arranged on the inner side of the pressing block 15, a mandrel 11 is provided with a matched conical surface at the position corresponding to the inclined surface, a plurality of mounting grooves are arranged on the periphery of the centering sleeve 12, the plurality of mounting grooves are uniformly arranged on the mounting disc 2 in a triangular shape, a joint bearing 16 is arranged in the mounting grooves, the top of the joint bearing 16 is connected with a gland 17, the gland 17 is fixedly arranged on the mounting disc 2, a clamping shaft 18 is arranged in the joint bearing 16, a clamping claw 19 is arranged on one side of the top of the clamping shaft 18, a matched inclined surface is arranged on one side of the bottom of the clamping shaft 18 at the position corresponding to the inclined block 601, a pin groove is arranged on the inclined surface, a locating pin 20 is mounted in the pin slot.
In this embodiment, when in use, the spindle connection disc 4 is firstly installed on the high-speed precision machine tool, the pull rod 8 is connected with the first power end of the high-speed precision machine tool, the installation shaft 7 is connected with the second power end of the high-speed precision machine tool, then the workpiece to be processed is placed on the centering sleeve 12, the pull rod 8 is driven by the first power end, the pull rod 8 is led to downwards move the spindle 11, when the spindle 11 moves downwards, the conical surface of the spindle 11 is attached to the inclined surface of the pressing block 15, so that the spindle 11 moves downwards to push the inclined surface of the pressing block 15 through the conical surface, the pressing block 15 slides out of the sliding groove 14, the inner ring of the workpiece is clamped and fixed, then the second power end is controlled to start, the installation shaft 7 is pushed upwards to push the positioning shaft 6, the positioning shaft 6 drives the inclined block 601 to move upwards, the positioning pin 20 at the bottom of the clamping shaft 18 moves along the inclined surface of the inclined block 601, the clamping shaft 18 is led to rotate under the action of the knuckle bearing 16, and the clamping jaw 19 is formed in the radial direction, so that the clamping jaw 19 clamps the workpiece.
Preferably, a notch groove is formed in one side of the top of the clamping shaft 18, and the mounting claw 19 is locked and mounted in the notch groove through a screw. Such a structural design makes the installation more fixed. In practice, other mounting configurations of the mounting jaw 19 are also contemplated as the case may be.
Preferably, one side of the bottom of the clamping shaft 18 is provided with an inner groove 21, a positioning spring 22 is arranged in the inner groove 21, the free end of the positioning spring 22 is connected with a positioning column 23, and the positioning end of the positioning column 23 is extruded on the inner wall of the tray body 1. This design allows the locating pin 20 to be tightly held against the bevel of the bevel block 601. In practice, other structural shapes of the positioning post 23 may be considered as the case may be.
Preferably, one side of the clamping shaft 18 is provided with a matching groove, the shaft sleeve 9 is provided with a matching block 24 at the corresponding matching groove, and the matching block 24 is arranged in the matching groove. Such a structural design facilitates movement of the clamp shaft 18. In practice, other mating configurations of the sleeve 9 and the clamping shaft 18 are also contemplated as the case may be.
Preferably, the top of the pull rod 8 is provided with a threaded rod 25, the pull rod 8 and the threaded rod 25 are integrally formed, the bottom of the mandrel 11 is provided with an internal thread groove at the position corresponding to the threaded rod 25, and the pull rod 8 is in locking connection with the mandrel 11 through the threaded rod 25. The structure design makes the connection convenient and the connection is fixed. In practice, other connection configurations of the tie rod 8 and the mandrel 11 may be used as the case may be.
Preferably, the pressing block 15 is provided with a clamp spring mounting groove 26, and a clamp spring coil is mounted in the clamp spring mounting groove 26. Such a structural design has the effect of quickly resetting the pressing block 15. In practice, other return configurations of the pressure piece 15 may be used as the case may be.
Preferably, a first sealing groove 27 is formed in the contact surface of the spindle connecting disc 4 and the disc body 1, a first sealing ring is installed in the first sealing groove 27, a second sealing groove 28 is formed in the top of the disc body 1, and a second sealing ring is installed in the second sealing groove 28. Such a structural design provides a sealing effect. In practice, other seal configurations may be used as the case may be.
Preferably, a positioning pad 29 is mounted on the top of the shaft sleeve 9, and the positioning pad 29 is mounted on the bottom of the mounting plate 2. The structural design is convenient to install. In practice, other configurations of the spacer 29 are contemplated as appropriate.
Preferably, a spring 30 is connected to the bottom of the connecting shaft 10, and the free end of the spring 30 is mounted on the upper side of the mounting shaft 7. Such structural design improves reset effect. In practice, other configurations of the spring 30 are contemplated as appropriate.
Preferably, the mounting plate 2 and the mounting sleeve 3 are arranged in an integrally formed structure. The structural design is convenient for production and processing. In practice, other shapes of the mounting plate 2 and the mounting sleeve 3 may be used as the case may be.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims of this invention, which are within the skill of those skilled in the art, can be made without departing from the spirit and scope of the invention disclosed herein.
Claims (1)
1. A chuck for achieving high concentricity in a plurality of combinations, characterized in that: including disk body (1), mounting disc (2) are installed at disk body (1) top, mounting disc (2) bottom is connected with installation sleeve (3), main shaft connection pad (4) are installed to the bottom of disk body (1), install locating plate (5) in main shaft connection pad (4), install locating shaft (6) in locating plate (5), locating shaft (6) bottom is connected with installation shaft (7), install pull rod (8) in installation shaft (7), locating shaft (6) top border is connected with a plurality of sloping blocks (601), a plurality of sloping blocks (601) are triangle-shaped evenly and arrange on locating shaft (6), axle sleeve (9) are installed at locating shaft (6) top, installation sleeve (3) are installed in axle sleeve (9), axle sleeve (9) bottom is connected with connecting axle (10), install on pull rod (8) in locating sleeve (3) top, install dabber (8) top (12) are connected with dabber (11), install centering sleeve (12) top (12) are installed at centering sleeve (12), the utility model discloses a centering sleeve, including centering sleeve (12) and clamping shaft (18), centering sleeve (12) top circumference is equipped with a plurality of spouts (14), and is a plurality of spout (14) even arrangement is on centering sleeve (12), install briquetting (15) in spout (14), the inboard of briquetting (15) is equipped with the inclined plane, dabber (11) are equipped with assorted conical surface in corresponding inclined plane department, mounting plate (2) are equipped with a plurality of mounting grooves in centering sleeve (12) circumference, and a plurality of the mounting grooves are triangle-shaped even arrangement on mounting plate (2), install joint bearing (16) in the mounting groove, joint bearing (16) top is connected with gland (17), gland (17) fixed mounting is on mounting plate (2), install clamping shaft (18) in joint bearing (16), jack catch (19) are installed to one side of the top of clamping shaft (18), clamping shaft (18) bottom one side is equipped with assorted inclined plane in corresponding inclined block (601), shaft (18) are equipped with the cotter groove in inclined plane department, install pin (20) in the cotter groove, install in one side of clamping shaft (18) is equipped with in the recess (21) through the tip of clamping shaft (21), the free end of the positioning spring (22) is connected with a positioning column (23), the positioning end of the positioning column (23) is extruded on the inner wall of the disc body (1), one side of the clamping shaft (18) is provided with a matching groove, the shaft sleeve (9) is provided with a matching block (24) at the position corresponding to the matching groove, the matching block (24) is installed in the matching groove, the top of the pull rod (8) is provided with a threaded rod (25), the pull rod (8) and the threaded rod (25) are integrally formed, the bottom of the mandrel (11) is provided with an internal thread groove at the position corresponding to the threaded rod (25), the pull rod (8) is in locking connection with the mandrel (11) through the threaded rod (25), the pressing block (15) is provided with a clamp spring installation groove (26), a clamp spring coil is installed in the clamp spring installation groove (26), the contact surface of the connecting disc (4) and the disc body (1) is provided with a first sealing groove (27), the top of the disc body (1) is provided with a second (28), the second sealing groove (28) is installed in the top of the disc body (1), the second sealing groove (29) is installed at the bottom of the disc (2), the free end of the spring (30) is arranged on the upper side of the mounting shaft (7), and the mounting disc (2) and the mounting sleeve (3) are arranged in an integrated structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210079973.3A CN114472948B (en) | 2022-01-24 | 2022-01-24 | Chuck capable of achieving high concentricity through various combinations |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210079973.3A CN114472948B (en) | 2022-01-24 | 2022-01-24 | Chuck capable of achieving high concentricity through various combinations |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114472948A CN114472948A (en) | 2022-05-13 |
| CN114472948B true CN114472948B (en) | 2023-08-22 |
Family
ID=81473958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210079973.3A Active CN114472948B (en) | 2022-01-24 | 2022-01-24 | Chuck capable of achieving high concentricity through various combinations |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114472948B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4637620A (en) * | 1984-09-04 | 1987-01-20 | Graham Merton J | Two stage chuck |
| CN201799635U (en) * | 2010-02-10 | 2011-04-20 | 长沙机床有限责任公司 | Jig of machine tool for internally centring and compacting at end surfaces |
| CN201841284U (en) * | 2010-08-17 | 2011-05-25 | 山东汇金股份有限公司 | High-precision three-inclined-column back-pull chuck |
| CN107617899A (en) * | 2016-07-15 | 2018-01-23 | 成都源云机械有限公司 | Double acting floating clamping device |
| CN110883589A (en) * | 2019-12-25 | 2020-03-17 | 北京北方车辆集团有限公司 | Intelligent fixture for drilling and milling of main frame |
| CN210231567U (en) * | 2019-07-08 | 2020-04-03 | 慈溪市奥菱机床附件有限公司 | Compensation type power chuck |
| CN111136291A (en) * | 2020-01-16 | 2020-05-12 | 杭州泽正机械有限公司 | Outer double-layered tight composite power chuck of tight of internal stay |
| CN111266615A (en) * | 2018-12-04 | 2020-06-12 | 航天新长征大道科技有限公司 | Clamp |
| CN211192061U (en) * | 2019-11-20 | 2020-08-07 | 勤威(天津)工业有限公司 | Thin-wall chuck for machining bearing support in automobile gearbox |
| CN211304833U (en) * | 2019-08-15 | 2020-08-21 | 呼和浩特众环工贸股份有限公司 | Accurate adjustable self-centering chuck |
-
2022
- 2022-01-24 CN CN202210079973.3A patent/CN114472948B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4637620A (en) * | 1984-09-04 | 1987-01-20 | Graham Merton J | Two stage chuck |
| CN201799635U (en) * | 2010-02-10 | 2011-04-20 | 长沙机床有限责任公司 | Jig of machine tool for internally centring and compacting at end surfaces |
| CN201841284U (en) * | 2010-08-17 | 2011-05-25 | 山东汇金股份有限公司 | High-precision three-inclined-column back-pull chuck |
| CN107617899A (en) * | 2016-07-15 | 2018-01-23 | 成都源云机械有限公司 | Double acting floating clamping device |
| CN111266615A (en) * | 2018-12-04 | 2020-06-12 | 航天新长征大道科技有限公司 | Clamp |
| CN210231567U (en) * | 2019-07-08 | 2020-04-03 | 慈溪市奥菱机床附件有限公司 | Compensation type power chuck |
| CN211304833U (en) * | 2019-08-15 | 2020-08-21 | 呼和浩特众环工贸股份有限公司 | Accurate adjustable self-centering chuck |
| CN211192061U (en) * | 2019-11-20 | 2020-08-07 | 勤威(天津)工业有限公司 | Thin-wall chuck for machining bearing support in automobile gearbox |
| CN110883589A (en) * | 2019-12-25 | 2020-03-17 | 北京北方车辆集团有限公司 | Intelligent fixture for drilling and milling of main frame |
| CN111136291A (en) * | 2020-01-16 | 2020-05-12 | 杭州泽正机械有限公司 | Outer double-layered tight composite power chuck of tight of internal stay |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114472948A (en) | 2022-05-13 |
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