CN210209389U - Turning and grinding integrated machine for internal threads of screw nuts - Google Patents
Turning and grinding integrated machine for internal threads of screw nuts Download PDFInfo
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- CN210209389U CN210209389U CN201920757524.3U CN201920757524U CN210209389U CN 210209389 U CN210209389 U CN 210209389U CN 201920757524 U CN201920757524 U CN 201920757524U CN 210209389 U CN210209389 U CN 210209389U
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Abstract
The utility model relates to the field of machinary, especially, relate to screw-nut internal thread turning and grinding all-in-one. The hydraulic chuck comprises a rack, wherein a servo spindle motor (10) is fixed on the rack, and the hydraulic chuck also comprises a spindle which can be driven by the servo spindle motor (10), the spindle is rotatably arranged on a spindle box (14), and the end part of the spindle comprises a hollow hydraulic chuck (6); also comprises a dresser device (4) arranged at the side of the main shaft; still include the lathe tool part of installing in the frame, the lathe tool part contain and install the lathe tool on lathe tool seat (1), still contain the bistrique case part of lathe tool part avris, bistrique case part contains emery wheel (32) that can polish.
Description
Technical Field
The utility model relates to the field of machinary, especially, relate to screw-nut internal thread turning and grinding all-in-one.
Background
The existing processing of the internal thread of the ball screw nut is basically divided into two procedures to be independently carried out, so that the consistency of clamping reference of two times can not be ensured, the form and position tolerance of subsequent internal thread grinding can not be effectively guaranteed, the input cost and the labor cost of processing equipment are increased, the labor intensity of operators is increased, and the production efficiency is lower.
SUMMERY OF THE UTILITY MODEL
The purpose of the utility model is that: in order to provide a better-effect screw nut internal thread turning and grinding all-in-one machine, specific purposes are seen in a plurality of substantial technical effects of a specific implementation part.
In order to achieve the purpose, the utility model adopts the following technical proposal:
the turning and grinding integrated machine for the internal thread of the screw nut is characterized by comprising a frame, wherein a servo spindle motor 10 is fixed on the frame, the machine also comprises a spindle driven by the servo spindle motor 10, the spindle is rotatably arranged on a spindle box 14, and the end part of the spindle comprises a hollow hydraulic chuck 6; also comprises a dresser device 4 arranged at the side of the main shaft; the grinding head box part comprises a grinding wheel 32 which can be ground.
The utility model discloses a further technical scheme lies in, dresser device 4 contain dresser support 22, dresser support 22 on contain dresser organism 27, install accurate T type lead screw pair 25 in dresser organism 27's the casing, accurate T type lead screw pair 25 cooperates the universal joint bearing frame to install, rotate accurate T type lead screw pair 25 and can drive the motion of the partial motion of trimming of avris, the partial motion of trimming contain diamond wheel 28, still contain diamond pen 23 on the board that dresser organism 27 stretches out; the diamond pen 23 is perpendicular to the axis of the diamond wheel 28.
The utility model discloses a further technical scheme lies in, bistrique portion contain bistrique case organism 29, installing bistrique case box body accurate T type lead screw pair 33 in bistrique case box body 29, bistrique case box body accurate T type lead screw pair 33 cooperation bistrique case organism universal joint bearing housing 34 installation, bistrique case box body accurate T type lead screw pair 33 can drive the electric main shaft box body 30 motion of avris, contain emery wheel 32 on the power output shaft of electric main shaft box body 30, emery wheel 32 can polish.
The utility model discloses a further technical scheme lies in, the lathe tool be the hole lathe tool, hole lathe tool dress is on this lathe tool seat 1.
The utility model has the further technical proposal that the rotating precise T-shaped screw pair 25 can drive the trimming part of the side to do arc motion; the precise T-shaped screw pair 33 of the grinding head box machine body can drive the electric main box body 30 on the side to do arc motion; the dresser body 27 includes a scale, and the head box body 29 also includes a scale.
The utility model discloses a further technical scheme lies in, is fixing Z to servo feed motor 18 in the frame, Z to servo feed motor 18's power output shaft on for Z to ball screw pair 13, Z can drive planker 16 along Z to the fore-and-aft movement to the slider on ball screw pair 13, Z is to the orientation or keep away from cavity hydraulic chuck 6 during the motion.
The utility model has the further technical proposal that an X-direction servo feeding motor 20 is fixed on a large planker 16, a power output shaft of the X-direction servo feeding motor 20 comprises an X-direction ball screw pair 21, a slide block of the X-direction ball screw pair 21 can drive a small supporting plate 17 to move, and a turning tool part and a head grinding box part 3 are arranged on the small supporting plate 17; the X direction is perpendicular to the Z direction.
The utility model discloses a further technical scheme lies in, X contains to the X of ball screw pair 21 avris to linear guide pair 19 that is on a parallel with X to the power output shaft of servo feed motor 20.
Adopt above technical scheme the utility model discloses, for prior art have following beneficial effect: compared with the traditional screw nut processing mode, the processing mode of the utility model has the advantages that the special machine is integrated on the basis of the traditional numerical control lathe and the internal thread grinding machine, has both turning function and grinding function, completely meets the processing requirements of turning and grinding of the internal thread of the ball screw nut, and greatly reduces the equipment purchase cost of a screw pair manufacturer; the whole process can be finished by changing the traditional secondary clamping into the one-time clamping, so that the processing precision and the production efficiency of the nut are improved.
Drawings
To further illustrate the present invention, further description is provided below with reference to the accompanying drawings:
FIG. 1 is a schematic structural view of the utility model;
FIG. 2 is a structural layout diagram of another perspective of the present invention;
fig. 3 is a structural layout diagram of another view angle of the utility model;
FIG. 4 is a schematic view of a dresser body;
FIG. 5 is a schematic view of a front structure of a dresser body;
fig. 6 is a schematic structural view of a grinding head box body;
fig. 7 is a front schematic view of the structure of the grinding box body;
wherein: 1-turning a tool apron; 2-electric spindle grinding head; 3-a grinding head box device; 4-a trimmer device; 5-grinding wheel dresser; 6-hollow hydraulic chuck; 7-ball screw nut; 8-Z direction linear guide rail pair; 9-main shaft circular arc tooth synchronous belt pulley; 10-servo spindle motor; 11-a hollow rotary cylinder; 12-circular arc tooth synchronous belt; 13-Z direction ball screw pair; 14-a main spindle box; 15-a lathe bed; 16-a large carriage; 17-a small carriage; an 18-Z servo feeding motor; a 19-X direction linear guide rail pair; a 20-X direction servo feeding motor; a 21-X direction ball screw pair; 22-a dresser support; 23-diamond pen; 24-universal joint bearing seats; 25-a precision T-shaped screw pair; 26-dial scale; 27-a dresser body; 28-diamond wheel; 29-grinding head box body; 30-electric spindle box; 31-a high-speed motorized spindle; 32-grinding wheel; 33-grinding head box body precision T-shaped screw rod pair; 34-grinding box body universal joint bearing seat; 35-grinding head box body dial.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings and embodiments, which are to be understood as illustrative only and not limiting the scope of the invention. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The patent provides a plurality of parallel schemes, and different expressions belong to an improved scheme based on a basic scheme or a parallel scheme. Each solution has its own unique features.
The first embodiment is as follows:
the turning and grinding integrated machine for the internal thread of the screw nut is characterized by comprising a frame, wherein a servo spindle motor 10 is fixed on the frame, the machine also comprises a spindle driven by the servo spindle motor 10, the spindle is rotatably arranged on a spindle box 14, and the end part of the spindle comprises a hollow hydraulic chuck 6; also comprises a dresser device 4 arranged at the side of the main shaft; the grinding head box part comprises a grinding wheel 32 which can be ground. The technical scheme of the invention has the following substantial technical effects and the realization process: firstly, an operator clamps a ball screw nut 7 on a hollow hydraulic chuck 6 of the special machine, the clamping mode adopts hydraulic drive, and the clamping action is automatically completed under the combined action of a hydraulic rotary oil cylinder 11 and the hollow hydraulic chuck 6; the turning tool on the secondary tool apron 1 is machined, the internal thread raceway of the ball screw nut 7 is turned, the electric spindle grinding head 2 starts after the turning action is finished, a second grinding procedure is started, and the grinding wheel can be dressed on the dresser diamond wheel 28.
As a preference of the first embodiment: the special machine is improved on the traditional numerical control lathe, and the numerical control lathe has the functions of directional parking, indexing alignment, return-to-zero detection and various protection functions; namely, the numerical control can be realized; the special machine has low overall cost, simple and convenient operation and strong practicability, basically meets the processing requirement of the screw rod nut, can replace part of imported turning and grinding composite machine tools, and has very wide market prospect; the special machine is controlled by a numerical control system, so that the automation degree is high, the labor intensity of an operator is reduced, and the production efficiency is improved; after the special machine can realize one-time clamping, two different processes of turning and grinding are independently completed, and secondary clamping is not needed in the process of machining, so that the entry points of turning and grinding of the roller way in the screw nut are effectively guaranteed to be consistent all the time, and the machining precision of a workpiece and the consistency of the roller way are greatly improved.
It should be noted that the solution of this section is at least an integral processing structure, which is an individual that can be sold independently, and the solutions of the lower sections are all parallel solutions or modified solutions.
Example two: as a further improvement or possible juxtaposition,
the dresser device 4 comprises a dresser support 22, the dresser support 22 comprises a dresser body 27, a precise T-shaped lead screw pair 25 is mounted in a shell of the dresser body 27, the precise T-shaped lead screw pair 25 is mounted by matching with a universal joint bearing seat, the precise T-shaped lead screw pair 25 can be rotated to drive a dressing part on the side to move, the dressing part comprises a diamond wheel 28, and a plate extending out of the dresser body 27 also comprises a diamond pen 23; the diamond pen 23 is perpendicular to the axis of the diamond wheel 28. The technical scheme of the invention has the following substantial technical effects and the realization process: the precise T-shaped screw pair 25 can realize adjustment by matching with a universal joint bearing seat, is a common adjustment structure, and has a specific structure; similar implementations are within the scope of this patent. When the precision T-shaped screw rod pair 25 rotates, the universal joint bearing seat is externally connected with a trimming part to realize the position adjustment. The second embodiment differs from the first embodiment in that the first embodiment of the dresser device 4 provides a wide range of implementations, for example, in the first embodiment, the diamond wheel 28 and the diamond pen 23 can be fixedly installed. The scheme provided in the paragraph makes the adjustment mode more flexible.
The grinding head part comprises a grinding head box body 29, a grinding head box body precision T-shaped screw rod pair 33 is installed in the grinding head box body 29, the grinding head box body precision T-shaped screw rod pair 33 is installed in a manner of being matched with a grinding head box body universal joint bearing seat 34, the grinding head box body precision T-shaped screw rod pair 33 can drive the electric main box body 30 on the side to move, a grinding wheel 32 is arranged on a power output shaft of the electric main box body 30, and the grinding wheel 32 can be used for grinding. The technical scheme of the invention has the following substantial technical effects and the realization process: the adjustment can be realized by matching the precise T-shaped screw rod pair 33 of the grinding head box body with a universal joint bearing seat, the adjustment is a common adjustment structure, and a specific structure is provided in the position; similar implementations are within the scope of this patent. When the grinding head box body universal joint bearing seat 34 rotates, the external part of the grinding head box body precision T-shaped screw rod pair 33 is connected with the electric main box body 30, so that the position adjustment is realized. The third embodiment is different from the first embodiment in that the first embodiment of the electric spindle box 30 and the grinding wheel 32 actually provides a wide range of implementation, for example, in the first embodiment, the electric spindle box 30 and the grinding wheel 32 can be fixedly installed. The scheme provided in the paragraph makes the adjustment mode more flexible.
As a further expression for the present embodiment: the turning tool is an inner bore turning tool which is arranged on the tool apron 1. The rotary precision T-shaped screw pair 25 can drive the trimming part of the side to do arc motion; the precise T-shaped screw pair 33 of the grinding head box machine body can drive the electric main box body 30 on the side to do arc motion; the dresser body 27 includes a scale, and the head box body 29 also includes a scale.
Example three: as a further improvement or a feasible parallel scheme, the device also comprises a part capable of being adjusted in multiple directions, and the specific adjusting structure is as follows: a Z-direction servo feed motor 18 is fixed on the frame, a power output shaft of the Z-direction servo feed motor 18 is provided with a Z-direction ball screw pair 13, a slide block on the Z-direction ball screw pair 13 can drive the large carriage 16 to move back and forth along the Z direction, and the Z direction faces or is far away from the hollow hydraulic chuck 6 during the movement. The technical scheme of the invention has the following substantial technical effects and the realization process: and the coordination of the whole processing function is realized through Z-direction adjustment.
Example four: as a further improvement or a feasible parallel scheme, an X-direction servo feeding motor 20 is fixed on the large planker 16, a power output shaft of the X-direction servo feeding motor 20 comprises an X-direction ball screw pair 21, a sliding block of the X-direction ball screw pair 21 can drive the small planker 17 to move, and a turning tool part and a head grinding box part 3 are arranged on the small planker 17; the X direction is perpendicular to the Z direction. The technical scheme of the invention has the following substantial technical effects and the realization process: the scheme in this paragraph is a further improvement of the third embodiment, and the position of the workpiece on the small pallet can be adjusted by the X-direction servo feed motor 20.
In the fourth embodiment, the side of the X-direction ball screw pair 21 includes an X-direction linear guide rail pair 19 parallel to the power output shaft of the X-direction servo feed motor 20. The X-direction linear guide rail pair 19 enables the motion to be stable.
In combination with all the above embodiments, a comprehensive description is made:
the servo control system starts to execute relevant instructions according to program codes compiled in advance, firstly, an operator clamps a ball screw nut 7 on a hollow hydraulic chuck 6 of the special machine, the clamping mode adopts hydraulic drive, and the clamping action is automatically completed under the combined action of a hydraulic rotary oil cylinder 11 and the hollow hydraulic chuck 6; the inner hole cutter on the secondary lathe tool seat 1 starts to turn the internal thread raceway of the ball screw nut 7, and the thread turning requires that the feed points of each time are consistent, so that the integrity and the continuity of the internal thread raceway can be ensured; a special machine adopts a transmission mode of a circular arc tooth synchronous belt 12, and a main motor is driven by a servo spindle motor 10, so that the C-axis function can be efficiently and stably realized; after the turning action is finished, the electric spindle grinding head 2 starts to start a second grinding process, the helix angle of the nut in the ball screw can be adjusted by the grinding wheel grinding head box device 3, and the feed point of the grinding process and the feed point of the turning process are the same point, so that the processing precision of the inner raceway of the screw nut is fully ensured, and the smoothness and the continuity of the inner raceway of the nut are ensured; the grinding wheel 32 is worn in the grinding process, the grinding wheel can be corrected on the diamond wheel 28 of the dresser, the dimensional tolerance and the form and position tolerance of the grinded roller path meet the use requirement, the helix angle of the grinding wheel dresser can be adjusted by the dresser adjusting seat device 4, the grinding feed can be finely adjusted through the cutter compensation until the roller path in the nut is ground to the required size, two different machining procedures are completed after one-time clamping, and the machining precision and the machining efficiency are improved.
As a further development, preference and optional development: ball screw nut internal thread car grinds all-in-one, its characterized in that: the special machine is driven by a servo spindle motor 10 and comprises a spindle unit which adopts a spindle arc tooth synchronous belt pulley 9 to transmit power, the spindle unit and the servo spindle motor 10 transmit power and torque through an arc tooth synchronous belt 12, and the transmission mechanism has the functions of C-axis positioning, indexing and the like;
the front end of the main shaft unit is provided with a hollow hydraulic chuck 6, and the rear end of the main shaft unit is provided with a hollow rotary oil cylinder 11 which can realize the automatic clamping and loosening of the workpiece under the combined action of the hollow hydraulic chuck and the hollow rotary oil cylinder. The small carriage 17 is provided with a lathe tool seat 1 part and a grinding head box device 3 part. The lathe tool seat 1 is positioned on a small carriage 17, a linear guide rail pair 19 is arranged on the carriage, and an X-direction ball screw pair 21 can drag the small carriage 17 to move back and forth along the X direction through a sliding block device under the driving of a servo feeding motor; the lathe tool seat 1 part comprises a tool seat and an inner bore lathe tool, and the inner bore lathe tool is arranged on the tool seat to realize the turning action of the inner bore of the nut; the grinding head box device 3 comprises a grinding head box body 29, the adjusting mechanism adopts a combination mode that a precise T-shaped lead screw assembly 33 is matched with a universal joint bearing adjusting seat 34, and is provided with a dial 35, so that the grinding head box device has the advantages of convenience in adjustment, simplicity in operation, good self-locking performance and the like. The grinding action of the inner raceway of the nut is powered by the electric main shaft grinding head 2, the grinding wheel 32 is driven to grind and process threads under the high-speed rotation of the electric main shaft grinding head, the adjustment and adjustment principle of the helix angle, namely the arc movement path, of the grinding head box device 3 is completely similar to the adjustment mode of the dresser device 4, namely the fine adjustment of the angle of the electric main shaft grinding head 2 is realized by driving a joint bearing through a precise T-shaped screw rod pair in a rotary grinding head adjusting seat; the grinding wheel grinding head adjusting seat is provided with a grinding head box body 29, a high-speed electric main shaft grinding head 2 is arranged in the grinding wheel grinding head adjusting seat, and a grinding wheel 32 is arranged on a connecting rod of the electric main shaft grinding head and can carry out quick and efficient grinding processing on an internal thread raceway of a thread rolling screw nut 7.
The dresser device 4 is arranged right behind the spindle box 14, the dresser device 4 comprises a dresser machine body 27, and the adjusting mechanism adopts a combination mode that a precise T-shaped lead screw pair 25 is matched with a universal joint bearing seat 24, and adjusts the angle of a dresser adjusting seat to realize grinding of the helix angle of the internal thread raceway of the lead screw nut.
Generally speaking, the special machine integrates a numerically controlled lathe and an internal thread grinding machine, the turning function of the numerically controlled lathe and the grinding function of the internal thread grinding machine can be achieved on the special machine, the transmission mode machining of the screw nut is achieved on the basis of two devices, namely the lathe and the internal thread grinding machine, the process which needs two machining devices originally can be integrated on the special machine after the novel special machine is adopted, the clamping times are reduced, and the machining precision and the production efficiency of products are improved
Creatively, the above effects exist independently, and the combination of the above results can be completed by a set of structure.
The technical effect that above structure was realized realizes clearly, if do not consider additional technical scheme, this patent name can also be a processingequipment. Some details are not shown in the figures.
It should be noted that the plurality of schemes provided in this patent include their own basic schemes, which are independent of each other and are not restricted to each other, but they may be combined with each other without conflict, so as to achieve a plurality of effects.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and the invention is to be limited to the embodiments described above.
Claims (8)
1. The screw nut internal thread turning and grinding integrated machine is characterized by comprising a rack, wherein a servo spindle motor (10) is fixed on the rack, the machine also comprises a spindle which can be driven by the servo spindle motor (10), the spindle is rotatably arranged on a spindle box (14), and the end part of the spindle comprises a hollow hydraulic chuck (6); also comprises a dresser device (4) arranged at the side of the main shaft; still include the lathe tool part of installing in the frame, the lathe tool part contain and install the lathe tool on lathe tool seat (1), still contain the bistrique case part of lathe tool part avris, bistrique case part contains emery wheel (32) that can polish.
2. The threading turning and grinding all-in-one machine for the internal threads of the screw nut as claimed in claim 1, wherein the dresser device (4) comprises a dresser support (22), the dresser support (22) comprises a dresser body (27), a precise T-shaped screw rod pair (25) is installed in a shell of the dresser body (27), the precise T-shaped screw rod pair (25) is installed by matching with a universal joint bearing seat, the precise T-shaped screw rod pair (25) can be rotated to drive a trimming part on the side to move, the trimming part comprises a diamond wheel (28), and a diamond pen (23) is further arranged on a plate extending out of the dresser body (27); the diamond pen (23) is vertical to the axle center of the diamond wheel (28).
3. The feed screw nut internal thread turning and grinding all-in-one machine as claimed in claim 1, wherein the grinding head part comprises a grinding head box body (29), a grinding head box body precision T-shaped screw rod pair (33) is mounted in the grinding head box body (29), the grinding head box body precision T-shaped screw rod pair (33) is mounted in a manner of being matched with a grinding head box body universal joint bearing seat (34), the grinding head box body precision T-shaped screw rod pair (33) can drive the electric spindle box body (30) on the side to move, a grinding wheel (32) is arranged on a power output shaft of the electric spindle box body (30), and the grinding wheel (32) can be ground.
4. The turning and grinding integrated machine for the internal thread of the screw nut according to claim 1, wherein the turning tool is an internal hole turning tool, and the internal hole turning tool is arranged on the turning tool holder (1).
5. The feed screw nut internal thread turning and grinding all-in-one machine as claimed in claim 1, characterized in that the turning precision T-shaped screw pair (25) can drive the trimming part of the side to do arc motion; the precise T-shaped screw pair (33) of the grinding head box body can drive the electric spindle box body (30) on the side to do arc motion; the dresser body (27) comprises scales, and the grinding head box body (29) also comprises scales.
6. The feed screw nut internal thread turning and grinding all-in-one machine as claimed in claim 1, wherein a Z-direction servo feed motor (18) is fixed on a rack, a power output shaft of the Z-direction servo feed motor (18) is provided with a Z-direction ball screw pair (13), a slide block on the Z-direction ball screw pair (13) can drive a large carriage (16) to move back and forth along the Z direction, and the Z direction faces or is far away from the hollow hydraulic chuck (6) during movement.
7. The feed screw nut internal thread turning and grinding integrated machine as claimed in claim 1, characterized in that an X-direction servo feed motor (20) is fixed on the large carriage (16), a power output shaft of the X-direction servo feed motor (20) comprises an X-direction ball screw pair (21), a slide block of the X-direction ball screw pair (21) can drive the small support plate (17) to move, and a turning tool part and a grinding head box part (3) are arranged on the small support plate (17); the X direction is perpendicular to the Z direction.
8. The feed screw nut internal thread turning and grinding all-in-one machine as claimed in claim 7, characterized in that the side of the X-direction ball screw pair (21) comprises an X-direction linear guide rail pair (19) parallel to the power output shaft of the X-direction servo feed motor (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920757524.3U CN210209389U (en) | 2019-05-24 | 2019-05-24 | Turning and grinding integrated machine for internal threads of screw nuts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920757524.3U CN210209389U (en) | 2019-05-24 | 2019-05-24 | Turning and grinding integrated machine for internal threads of screw nuts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210209389U true CN210209389U (en) | 2020-03-31 |
Family
ID=69927477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920757524.3U Expired - Fee Related CN210209389U (en) | 2019-05-24 | 2019-05-24 | Turning and grinding integrated machine for internal threads of screw nuts |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210209389U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115647827A (en) * | 2022-12-22 | 2023-01-31 | 山东台稳精密机械有限公司 | Ball nut machining device and machining method |
-
2019
- 2019-05-24 CN CN201920757524.3U patent/CN210209389U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115647827A (en) * | 2022-12-22 | 2023-01-31 | 山东台稳精密机械有限公司 | Ball nut machining device and machining method |
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