CN114986202A - Auxiliary tool mounting and positioning device for vertical numerically controlled lathe - Google Patents
Auxiliary tool mounting and positioning device for vertical numerically controlled lathe Download PDFInfo
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- CN114986202A CN114986202A CN202210743222.7A CN202210743222A CN114986202A CN 114986202 A CN114986202 A CN 114986202A CN 202210743222 A CN202210743222 A CN 202210743222A CN 114986202 A CN114986202 A CN 114986202A
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- 230000007246 mechanism Effects 0.000 claims abstract description 11
- 238000009434 installation Methods 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 48
- 239000010959 steel Substances 0.000 claims description 48
- 230000000694 effects Effects 0.000 abstract description 5
- 238000003754 machining Methods 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 208000010641 Tooth disease Diseases 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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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
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/25—Movable or adjustable work or tool supports
- B23Q1/44—Movable or adjustable work or tool supports using particular mechanisms
- B23Q1/50—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism
-
- 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
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/12—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for securing to a spindle in general
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- 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
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention discloses a tooling auxiliary installation positioning device for a vertical type numerical control lathe, which comprises a zero-point faceplate and a tooling connecting disc, wherein a plurality of zero-point grooves are arranged on the connecting surface of the zero-point faceplate, zero-point connecting devices are arranged on the zero-point grooves, positioning locking grooves are arranged on the zero-point connecting devices, blind rivet pieces matched with the positioning locking grooves are arranged on the tooling connecting disc, locking mechanisms for locking the blind rivet pieces are arranged in the zero-point connecting devices, and the tooling connecting disc is installed on the zero-point faceplate in a positioning mode through the blind rivet pieces and the zero-point connecting devices. The invention not only can improve the positioning precision of the tool, ensure that the processing part is concentric with the main shaft of the vertical numerical control lathe and ensure the processing effect, but also can achieve the effect of directly clamping and processing without debugging in the subsequent processing through the relative position relation of the connecting disc and the zero flower disc after the debugging is finished at one time, and greatly improve the processing efficiency.
Description
Technical Field
The invention belongs to the technical field of numerically controlled lathes, relates to a tool mounting technology of a vertical numerically controlled lathe, and particularly relates to a tool auxiliary mounting and positioning device for the vertical numerically controlled lathe.
Background
In the process of machining parts of a vertical numerically controlled lathe, due to uncertainty of part requirements, the situation that a production department needs to carry out production arrangement on the same part for multiple times at different time periods occurs. Therefore, the processing tool of the part needs to be aligned again during each processing, namely, the alignment of the chuck of the vertical numerically controlled lathe and the connecting disc of the tool needs to be realized, and the chuck is manually tightened by an operator after the alignment is finished. In current production process, mainly adopt two kinds of faceplates of screw hole faceplates and three-jaw faceplates to realize the alignment to the connection pad, but this two kinds of modes all have great problem in actual production process, specifically as follows:
1. the threaded holes are uniformly distributed on the faceplate in an equal-ratio offset manner, so that the avoiding problem of the screw mounting holes needs to be considered in tool design. Due to the problem of machining errors of the threaded mounting hole, the threaded hole of the disc chuck is prone to forming the problems of tooth disorder and scrap iron blockage after repeated use. In addition, the machining rotation center of the part is not easy to adjust and is consistent with the main shaft, so that the debugging phase consumes more time, and the production and machining time is delayed. And secondly, the same part is produced in multiple batches, and multiple times of repeated debugging are needed.
2. The three-jaw chuck is too complicated because different parts need to be provided with three jaws of different types. Or the three claws are machined again, so that the service life is greatly shortened. In addition, in the actual production debugging process, the situation that the machining rotation center of the part is not coaxial with the rotation center of the machine tool often exists, so that the machining characteristics of the part are seriously deviated relative to a blank. Therefore, in the tool debugging stage, an operator needs to adjust the three-jaw and the connecting disc of the tool for multiple times, so that the part machining rotation center is close to the rotation center of the machine tool, the process is time-consuming and labor-consuming, and the operation is complicated. And secondly, the same part is produced in batches, and multiple times of debugging work is needed.
Therefore, the two modes have the condition that the same part is processed at different time periods, and debugging is needed each time, so that the repeated alternative behavior is time-consuming and labor-consuming, the efficiency is low, the production period of the part is prolonged, and the production cost is increased.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the auxiliary mounting and positioning device for the tool of the vertical numerical control lathe is provided, the positioning precision of the tool can be improved, the machined part is concentric with the main shaft of the vertical numerical control lathe, the machining effect is guaranteed, after one-time debugging is finished, the effect of direct clamping and machining without debugging in subsequent machining is achieved through the relative position relation of the connecting disc and the zero-point faceplate, and the machining efficiency is greatly improved.
The technical scheme is as follows: in order to achieve the purpose, the invention provides a tooling auxiliary installation positioning device for a vertical type numerical control lathe, which comprises a zero-point faceplate and a tooling connecting disc, wherein a plurality of zero-point grooves are formed in the connecting surface of the zero-point faceplate, zero-point connecting devices are arranged on the zero-point grooves, positioning locking grooves are formed in the zero-point connecting devices, blind rivet pieces matched with the positioning locking grooves are arranged on the tooling connecting disc, locking mechanisms used for locking the blind rivet pieces are arranged in the zero-point connecting devices, and the tooling connecting disc is installed on the zero-point faceplate in a positioning mode through the blind rivet pieces and the zero-point connecting devices.
Furthermore, the number of the zero point grooves is four, and the zero point grooves are radially and symmetrically arranged on the connecting surface of the zero point faceplate.
Further, locking mechanism includes dog, locking control chamber, pressurization air flue and a plurality of steel ball, zero connecting device includes the base and sets up the connecting seat on the base, location locking groove and locking control groove have been seted up on the base, locking control groove encloses the setting of location locking groove, locking control groove and connecting seat form the locking control chamber, the dog cooperation sets up in the locking control chamber, be provided with between location locking groove and the locking control groove with steel ball assorted steel ball hole, the steel ball cooperation sets up downthehole at the steel ball, the steel ball is used for locking and unclamps the blind rivet spare, the pressurization air flue sets up in zero flower disc, the bottom of base is provided with the pressurization air inlet, the both ends of pressurization air inlet communicate with pressurization air flue and locking control chamber respectively.
Furthermore, the blind rivet piece comprises a positioning blind rivet and a locking blind rivet sleeved on the positioning blind rivet, the middle area of the outer side wall of the locking blind rivet is sunken towards the inner side to form a clamping notch, the clamping notch is used for being matched with the steel ball to lock and fix the locking blind rivet, the middle area of the inner side wall of the stop block is sunken towards the inner side to form a steel ball notch, and the steel ball notch is used for providing an outward moving space for the steel ball.
Furthermore, the end part of the positioning blind rivet is provided with a positioning groove, and a positioning head matched with the positioning groove is arranged in the positioning locking groove.
Furthermore, the locking control cavity is internally provided with a reset spring part, the top end of the reset spring part is connected to the connecting seat, and the bottom end of the reset spring part is connected to the top of the stop block.
Furthermore, a plurality of screw holes and screws matched with the screw holes are symmetrically arranged on the connecting seat in the radial direction, and the connecting seat is fixedly installed on the zero-point groove through the screws.
The design principle of the invention is as follows: adopt the butt joint structure of flower disc and frock connection pad at zero point, utilize the interior locking mechanical system of connecting device at zero point, can realize the longitudinal movement of dog in the locking control intracavity through the pressurized mode, utilize the change of the relative position of dog and steel ball, can change the state of steel ball, thereby change the state of rivet spare in the positioning and locking inslot, not only make the frock connection pad possess fine dismouting convenience on flower disc at zero point, and possess fabulous structural stability after the installation of frock connection pad, and can ensure that flower disc and frock connection pad at zero point are in coaxial position, to the processing of same part, need not to carry out the alignment operation many times repeatedly.
Has the advantages that: compared with the prior art, the invention has the following advantages:
1. after the tool connecting disc is arranged on the zero-point disc chuck, the position coaxial with the zero-point disc chuck can be ensured, the positioning precision of the tool finally arranged on the tool connecting disc is ensured, and the using effect of the tool is ensured.
2. For the processing of the same part, repeated alignment operation is not needed, and the overall processing efficiency of the part is effectively improved.
3. The tooling connecting plate can be automatically aligned on the zero-point faceplate, the installation and operation are simple and efficient, and the labor intensity is reduced.
Drawings
FIG. 1 is a schematic structural view of a zero-point flower disc;
FIG. 2 is a schematic structural view of a tooling connecting disc;
FIG. 3 is a schematic view of a zero point connection device;
FIG. 4 is a schematic view of a tooling connecting disc installed on a zero flower disc;
FIG. 5 is a schematic view of the locking mechanism in a locked state;
FIG. 6 is a schematic view of the locking mechanism in an unlocked state;
FIG. 7 is a schematic view of a state of a steel ball when the locking mechanism is in a locking state;
FIG. 8 is a schematic view of the state of the steel ball when the locking mechanism is in the unlocked state;
fig. 9 is an exploded view of the zero point faceplate and tooling interface disc.
Detailed Description
The present invention is further illustrated by the following figures and specific examples, which are to be understood as illustrative only and not as limiting the scope of the invention, which is to be given the full breadth of the appended claims and any and all equivalent modifications thereof which may occur to those skilled in the art upon reading the present specification.
As shown in fig. 1 to 9, the invention provides a fixture auxiliary mounting and positioning device for a vertical numerically controlled lathe, which comprises a zero-point faceplate 1 of the vertical numerically controlled lathe and a fixture connecting disc 8 for connecting and mounting a fixture, wherein four zero-point grooves 14 are radially and symmetrically arranged on a connecting surface of the zero-point faceplate 1, a zero-point connecting device 2 is arranged on each zero-point groove 14, each zero-point connecting device 2 comprises a base 22 and a connecting seat 21 arranged on the base 22, a plurality of screw holes 24 and screws 15 matched with the screw holes 24 are radially and symmetrically arranged on the connecting seat 21, the connecting seat 21 is fixedly mounted on the zero-point grooves 14 through the screws 15, a positioning and locking groove 23 is arranged on the zero-point connecting device 2, a rivet piece matched with the positioning and locking groove 23 is arranged on the fixture connecting disc 8, a locking mechanism for locking the rivet piece is arranged in the zero-point connecting device 2, and the fixture connecting disc 8 is coaxially positioned and mounted on the faceplate 1 through the rivet piece and the zero-point connecting device 2.
The locking mechanism comprises a stop block 3, a locking control cavity 17, a pressurizing air channel 11 and four steel balls 5, a positioning locking groove 23 and a locking control groove 12 are formed in a base 22, the locking control groove 12 is arranged around the positioning locking groove 23, a connecting seat 21 is arranged on the base 22 through screws, the locking control groove 12 and the connecting seat 21 form the locking control cavity 17, the stop block 3 is arranged in the locking control cavity 17 in a matched mode, a steel ball hole 14 matched with the steel ball 5 is formed between the positioning locking groove 23 and the locking control groove 12, the steel ball 5 is arranged in the steel ball hole 14 in a matched mode, the four steel ball holes 14 are radially and symmetrically arranged, the pressurizing air channel 11 is arranged in a zero flower disc 1, a pressurizing air inlet 18 is formed in the bottom of the base 22, and two ends of the pressurizing air inlet 18 are respectively communicated with the pressurizing air channel 11 and the locking control cavity 17.
The blind rivet piece comprises a positioning blind rivet 7 and a locking blind rivet 6 which is sleeved and fixed on the positioning blind rivet 7, the middle area of the outer side wall of the locking blind rivet 6 is sunken inwards to form a clamping notch 61, the clamping notch 61 is used for being matched with the steel ball 5 to lock and fix the locking blind rivet 6, the middle area of the inner side wall of the stop block 3 is sunken inwards to form a steel ball notch 31, and the steel ball notch 31 is used for providing an outward moving space for the steel ball 5; the end part of the positioning blind rivet 7 is provided with a positioning groove 71, and a positioning head 13 matched with the positioning groove 71 is arranged in the positioning locking groove 23; be provided with the spring part that resets 4 in the locking control chamber 17, the top of spring part that resets 4 is connected on connecting seat 21, and the bottom is connected at dog 3 top.
Referring to fig. 1 to 9, in the present embodiment, the auxiliary tool mounting and positioning device is applied to a machining process of a vertical numerically controlled lathe, and the specific operation flow includes:
firstly, the locking control cavity 17 is ventilated and pressurized through the pressurizing air passage 11, the stop dog 3 moves upwards under the action of air pressure, so that the stop dog 3 reaches the state shown in figure 6, at the moment, the steel ball notch 31 of the stop dog 3 is just positioned at the transverse position of the steel ball 5, then four rivet pulling pieces of the tooling connecting disc 8 are respectively aligned and inserted into the positioning locking grooves 23 of the four zero-point connecting devices 2 on the zero-point flower disc 1, in the inserting process of the rivet pulling pieces, the locking rivet 6 can extrude the steel ball 5 towards the steel ball notch 31, so that the positioning groove 71 of the positioning rivet 7 can be smoothly installed on the positioning head 13 in the positioning locking groove 23, then the ventilation is stopped, the stop dog 3 can fall and reset under the action of the resetting spring piece 4 due to the loss of the air pressure, in the falling process, the steel ball notch 31 can extrude the steel ball 5 towards the clamping notch 61 of the locking rivet 6, until the steel ball 5 is extruded to the state shown in fig. 5, at this time, the steel ball 5 can just press the lower end of the clamping notch 61, and the stopper 3 can block the steel ball 5, so that the steel ball 5 is in a fixed state, the steel ball 5 locks the locking rivet 6, and the whole rivet piece is also locked, thus the installation of the tool connecting disc 8 on the zero-point faceplate 1 is completed.
At the moment, the tool connecting disc 8 and the zero face disc 1 are in a coaxial state, the tool connected to the tool connecting disc 8 is guaranteed to be in the correct position, the tool is used for assisting the vertical numerical control lathe in processing parts, the installation accuracy of the tool is consistent during each processing of the same batch of parts, the alignment operation does not need to be repeated for many times, and the overall processing efficiency of the parts is effectively improved.
In addition, when the tool connecting disc 8 needs to be replaced, similarly, the pressurizing and air-supplying are needed to be carried out in the locking control cavity 17 through the pressurizing air passage 11, the stop dog 3 moves upwards under the action of air pressure, the stop dog 3 is made to reach the state shown in fig. 6, at the moment, the steel ball 5 is in the transverse movable state, the locking blind rivet 6 and the positioning blind rivet 7 can be directly taken out from the positioning locking groove 23, in the pulling-out process, the steel ball 5 can be extruded out of the positioning locking groove 23 through the clamping notch 61, the steel ball 5 loses the locking function, the locking blind rivet 6 and the positioning blind rivet 7 are directly pulled out, and then the new tool connecting disc 8 is continuously installed.
Claims (7)
1. The utility model provides a frock auxiliary erection positioner for vertical numerical control lathe, its characterized in that includes zero flower disc and frock connection pad, be provided with a plurality of zero grooves on the face of connecting of zero flower disc, install zero connecting device on the zero groove, be provided with the location locking groove on the zero connecting device, be provided with the blind rivet spare with location locking groove phase-match on the frock connection pad, be provided with the locking mechanism who is used for locking blind rivet spare in the zero connecting device, the frock connection pad passes through blind rivet spare and zero connecting device location installation on zero flower disc.
2. A tool auxiliary mounting and positioning device for a vertical numerically controlled lathe according to claim 1, wherein the number of the zero point grooves is four, and the zero point grooves are radially and symmetrically arranged on the connecting surface of the zero point chuck.
3. A tool auxiliary mounting and positioning device for a vertical numerically controlled lathe according to claim 1, it is characterized in that the locking mechanism comprises a stop block, a locking control cavity, a pressurizing air passage and a plurality of steel balls, the zero point connecting device comprises a base and a connecting seat arranged on the base, a positioning locking groove and a locking control groove are arranged on the base, the locking control groove is arranged around the positioning locking groove, the locking control groove and the connecting seat form a locking control cavity, the stop block is arranged in the locking control cavity in a matching way, a steel ball hole matched with the steel ball is arranged between the positioning locking groove and the locking control groove, the steel balls are arranged in the steel ball holes in a matching way, the steel balls are used for locking and loosening the rivet pulling piece, the pressurizing air passage is arranged in the zero-point faceplate, the bottom of base is provided with the pressurization air inlet, the both ends of pressurization air inlet communicate with pressurization air flue and locking control chamber respectively.
4. The tool auxiliary mounting positioning device for the vertical numerically controlled lathe is characterized in that the rivet piece comprises a positioning rivet and a locking rivet sleeved on the positioning rivet, the middle area of the outer side wall of the locking rivet is recessed inwards to form a clamping notch, the clamping notch is used for being matched with a steel ball to lock and fix the locking rivet, the middle area of the inner side wall of the stop block is recessed inwards to form a steel ball notch, and the steel ball notch is used for providing an outward moving space for the steel ball.
5. The tool auxiliary mounting and positioning device for the vertical numerically controlled lathe according to claim 4, wherein a positioning groove is formed in the end of the positioning rivet, and a positioning head matched with the positioning groove is arranged in the positioning locking groove.
6. A tool auxiliary mounting and positioning device for a vertical numerically controlled lathe as claimed in claim 3, wherein a return spring part is arranged in the locking control cavity, the top end of the return spring part is connected to the connecting seat, and the bottom end of the return spring part is connected to the top of the stop block.
7. A tool auxiliary mounting and positioning device for a vertical numerically controlled lathe according to claim 3, wherein a plurality of screw holes and screws matched with the screw holes are radially and symmetrically arranged on the connecting seat, and the connecting seat is fixedly mounted on the zero point groove through the screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210743222.7A CN114986202A (en) | 2022-06-28 | 2022-06-28 | Auxiliary tool mounting and positioning device for vertical numerically controlled lathe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210743222.7A CN114986202A (en) | 2022-06-28 | 2022-06-28 | Auxiliary tool mounting and positioning device for vertical numerically controlled lathe |
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| Publication Number | Publication Date |
|---|---|
| CN114986202A true CN114986202A (en) | 2022-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210743222.7A Pending CN114986202A (en) | 2022-06-28 | 2022-06-28 | Auxiliary tool mounting and positioning device for vertical numerically controlled lathe |
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| CN (1) | CN114986202A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115816188A (en) * | 2022-11-15 | 2023-03-21 | 重庆大学 | Co-reference eccentric hole rapid positioning system and control method thereof |
| CN116275305A (en) * | 2023-02-16 | 2023-06-23 | 上海羿弓精密科技有限公司 | Needle gear shell machining device, needle gear shell machining process and needle gear shell |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205968462U (en) * | 2016-08-29 | 2017-02-22 | 北京精雕科技集团有限公司 | Zero point quick change device |
| CN111230547A (en) * | 2020-02-25 | 2020-06-05 | 成都飞机工业（集团）有限责任公司 | Flexible and rapid clamping fixture and clamping method for rotary machine tool |
| CN213351637U (en) * | 2020-10-14 | 2021-06-04 | 东莞市沃维克精密工具有限公司 | Novel zero point positioning device |
-
2022
- 2022-06-28 CN CN202210743222.7A patent/CN114986202A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205968462U (en) * | 2016-08-29 | 2017-02-22 | 北京精雕科技集团有限公司 | Zero point quick change device |
| CN111230547A (en) * | 2020-02-25 | 2020-06-05 | 成都飞机工业（集团）有限责任公司 | Flexible and rapid clamping fixture and clamping method for rotary machine tool |
| CN213351637U (en) * | 2020-10-14 | 2021-06-04 | 东莞市沃维克精密工具有限公司 | Novel zero point positioning device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115816188A (en) * | 2022-11-15 | 2023-03-21 | 重庆大学 | Co-reference eccentric hole rapid positioning system and control method thereof |
| CN115816188B (en) * | 2022-11-15 | 2024-03-29 | 重庆大学 | Co-reference eccentric hole rapid positioning system and control method thereof |
| CN116275305A (en) * | 2023-02-16 | 2023-06-23 | 上海羿弓精密科技有限公司 | Needle gear shell machining device, needle gear shell machining process and needle gear shell |
| CN116275305B (en) * | 2023-02-16 | 2024-04-16 | 上海羿弓精密科技有限公司 | Needle gear shell machining device, needle gear shell machining process and needle gear shell |
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