CN210677203U - Numerical control gear grinding machine - Google Patents
Numerical control gear grinding machine Download PDFInfo
- Publication number
- CN210677203U CN210677203U CN201921003939.8U CN201921003939U CN210677203U CN 210677203 U CN210677203 U CN 210677203U CN 201921003939 U CN201921003939 U CN 201921003939U CN 210677203 U CN210677203 U CN 210677203U
- Authority
- CN
- China
- Prior art keywords
- rotating shaft
- box body
- axis
- shaft box
- mounting seat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Grinding Of Cylindrical And Plane Surfaces (AREA)
Abstract
The utility model discloses a numerical control gear grinding machine, include: the device comprises a machine body, a first mounting seat and a second mounting seat, wherein the first mounting seat and the second mounting seat are arranged on the machine body; the second rotating shaft box body is movably arranged on the first mounting seat and is provided with a rotating shaft B shaft, the end part of the rotating shaft B shaft is provided with a first rotating shaft box body, the first rotating shaft box body is provided with a workpiece main shaft A shaft, and the end part of the workpiece main shaft A shaft is provided with a workpiece; the sliding table is movably arranged on the second mounting seat; the third rotating shaft box body is movably arranged on the sliding table and is provided with a grinding wheel spindle C shaft, and a grinding wheel is arranged at the lower end of the grinding wheel spindle C shaft; and the cooling oil tank is arranged below the first rotating shaft box body along the X-axis direction. The utility model provides a more traditional structure of gear grinding machine owing to need not the control emery wheel and removes to the other end from the one end of work piece main shaft A axle, consequently can reduce gear grinding machine's volume, area, reduction in production cost improves market competition.
Description
Technical Field
The invention belongs to the technical field of gear machining equipment, and particularly relates to a numerical control gear grinding machine.
Background
The spiral bevel gear is a transmission part which can transmit stably and with low noise according to a stable transmission ratio, has different names in different areas, and is called as a spiral bevel gear, an arc bevel gear, a spiral bevel gear and the like. The spiral bevel gear has the advantages of high transmission efficiency, stable transmission ratio, large circular arc overlapping coefficient, high bearing capacity, stable and smooth transmission, reliable work, compact structure, energy and material conservation, space saving, wear resistance, long service life and low noise, thereby being widely applied to the field of machinery.
In the production and processing process, the spiral bevel gear is processed by a gear grinding machine, the spiral bevel gear is divided into a left-handed direction and a right-handed direction, and in order to meet the requirement that the gear grinding machine can process two spiral bevel gears, as shown in fig. 3, in a traditional gear grinding machine, a workpiece box 700 and a grinding wheel box 800 are generally arranged, a horizontal workpiece main shaft is arranged on the workpiece box 700, two ends of the workpiece main shaft penetrate out of the workpiece box 700 and are provided with a workpiece clamping rotary table for mounting a workpiece, and the grinding wheel box 800 can move from one end of the workpiece main shaft to the other end, so that the left-handed and right-handed spiral bevel gear processing is realized. In the structural design, the grinding wheel box needs to be moved by arranging a longer guide rail, so that the gear grinding machine is large in size and large in occupied space, cooling oil tanks need to be arranged at two ends of the workpiece main shaft respectively, and the production cost is high.
Disclosure of Invention
In order to solve the problems, the invention provides a numerical control gear grinding machine which is small in size and low in cost.
The invention adopts a technical scheme for solving the technical problems that:
numerical control gear grinding machine includes:
the mounting seat comprises a horizontal first mounting seat and a vertical second mounting seat;
the second rotating shaft box body can be movably arranged on the first mounting seat along the horizontal axis to the X axis and used for adjusting the distance between the second rotating shaft box body and the second mounting seat, a rotating shaft B axis which is vertical to the X axis along the horizontal direction is arranged on the second rotating shaft box body, the end part of the rotating shaft B axis extends to the outer side of the first mounting seat and is fixedly provided with a first rotating shaft box body, the first rotating shaft box body can rotate around the rotating shaft B axis, a workpiece spindle A axis which is vertical to the rotating shaft B axis is arranged on the first rotating shaft box body, and a workpiece is arranged at the end part of the workpiece spindle A axis;
the sliding table is movably arranged on the second mounting seat along the horizontal axial direction Y axis;
the third rotating shaft box body is movably arranged on the sliding table along the vertical axial direction Z axis and is positioned above the first rotating shaft box body, a vertical grinding wheel spindle C axis is arranged on the third rotating shaft box body, and a grinding wheel is arranged at the lower end of the grinding wheel spindle C axis;
and the cooling oil tank is arranged below the first rotating shaft box body along the X-axis direction.
Preferably, the first mounting seat is provided with an X-axis guide rail, and the second rotating shaft box body is slidably mounted on the X-axis guide rail; the second mounting base is provided with a Y-axis guide rail, and the sliding table is slidably mounted on the Y-axis guide rail; the sliding table is provided with a Z-axis guide rail, and the third rotating shaft box body is slidably mounted on the Z-axis guide rail.
Preferably, the method further comprises the following steps:
the first driving mechanism is arranged on the first mounting seat and is in transmission connection with the second rotating shaft box body so as to control the second rotating shaft box body to move along the X-axis guide rail;
the second driving mechanism is arranged on the second mounting seat and is in transmission connection with the sliding table so as to control the sliding table to move along the Y-axis guide rail;
and the third driving mechanism is arranged on the sliding table and is in transmission connection with the third rotating shaft box body so as to be used for controlling the third rotating shaft box body to move along the Z-axis guide rail.
Preferably, the first driving mechanism, the second driving mechanism and the third driving mechanism are a motor screw mechanism, a linear motor, an air cylinder or an oil cylinder.
Preferably, the first rotating shaft box body is provided with a workpiece rotation driving motor for driving the workpiece spindle A to rotate, the second rotating shaft box body is provided with a workpiece reversing driving motor for driving the rotating shaft B to rotate, and the third rotating shaft box body is provided with a grinding wheel rotation driving motor for driving the grinding wheel spindle C to rotate.
Preferably, the second rotating shaft box body is vertically provided with a grinding wheel dressing device, and the grinding wheel dressing device is located at one end, close to the first rotating shaft box body, of the second rotating shaft box body and is located at one end, close to the sliding table, of the first rotating shaft box body.
The invention has the beneficial effects that:
according to the gear grinding machine, six-axis adjustment movement can be realized between the grinding wheel and the workpiece through the arrangement of the structure, the rotating shaft B is rotated to enable the workpiece spindle A to be horizontal, the spiral bevel gear can be machined, when left-hand machining needs to be switched to right-hand machining, the rotating shaft B only needs to be controlled to rotate 180 degrees, and compared with the traditional structure, the gear grinding machine does not need to control the grinding wheel to move from one end of the workpiece spindle A to the other end, so that the size and the floor area of the gear grinding machine can be reduced, the production cost is reduced, and the market competitiveness is improved.
Drawings
The invention is further illustrated with reference to the following figures and examples:
FIG. 1 is a schematic diagram of a first perspective of the present invention;
FIG. 2 is a schematic diagram of a second perspective of the present invention;
fig. 3 is a schematic diagram of a conventional structure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
Example 1
Referring to fig. 1 and 2, the present invention is a numerical control gear grinding machine including:
the mounting structure comprises a machine body 100, wherein the machine body 100 is provided with an L-shaped mounting seat, and the mounting seat comprises a horizontal first mounting seat 101 and a vertical second mounting seat 102;
the second rotating shaft box body 200 is mounted on the first mounting seat 101 in a manner that the second rotating shaft box body 200 can move along the horizontal axis to the X axis so as to be used for adjusting the distance between the second rotating shaft box body 200 and the second mounting seat 102, the second rotating shaft box body 200 is provided with a rotating shaft B axis which is vertical to the X axis along the horizontal direction, the end part of the rotating shaft B axis extends to the outer side of the first mounting seat 101 and is fixedly provided with a first rotating shaft box body 300, the first rotating shaft box body 300 can rotate around the rotating shaft B axis, the first rotating shaft box body 300 is provided with a workpiece spindle A axis which is vertical to the rotating shaft B axis, and a workpiece is mounted at the end part of the workpiece spindle A axis;
the sliding table 400 is mounted on the second mounting seat 102 in a manner that the sliding table 400 can move along the horizontal axis direction Y;
the third rotating shaft box 500 is mounted on the sliding table 400 in a manner of moving along the vertical axial direction Z axis and is positioned above the first rotating shaft box 300, the third rotating shaft box 500 is provided with a vertical grinding wheel spindle C axis, and the lower end of the grinding wheel spindle C axis is provided with a grinding wheel;
and a cooling oil tank 600, wherein the cooling oil tank 600 is arranged below the first rotating shaft box body 300 along the X-axis direction.
An X-axis guide rail 203 is disposed on an upper end surface of the first mounting base 101, a first driving mechanism is disposed on the first mounting base 101, and the second rotating shaft box 200 is slidably mounted on the X-axis guide rail 203 and can move along the X-axis direction by being driven by the first driving mechanism. In the present embodiment, the X-axis guide rails 203 are provided in parallel two, and the two X-axis guide rails 203 are symmetrical with respect to the center line of the second swing axis case 200 in the Y-axis direction, so that the second swing axis case 200 is supported and guided by the X-axis guide rails 203 at the same time. The first driving mechanism comprises an X-axis lead screw 201 and a first driving motor 202, the X-axis lead screw 201 is arranged at the bottom of the second rotary shaft box body 200 in a penetrating mode and is in threaded connection with the second rotary shaft box body 200, and the X-axis lead screw 201 is located at the position of a middle line between the two X-axis guide rails 203 and is installed between the second rotary shaft box body 200 and the first installation seat 101 in a hidden mode. The first driving motor 202 is disposed at one end of the X-axis lead 201 far from the second mounting seat 102 and is in transmission connection with the X-axis lead 201, so as to control the X-axis lead 201 to rotate, and further control the second rotating shaft box 200 to move on the X-axis guide rail 203.
Therefore, when the second rotating shaft box body 200 moves on the X-axis guide rail 203, the problem that the X-axis guide rail 203 close to the center of gravity is abraded more due to the gravity center shift can be avoided, and the service life is prolonged. And the setting of X axle lead screw 201 both can guarantee that second pivot axle box 200 receives the traction uniformly, reduces the wearing and tearing of X axle lead screw 201, also can reduce equipment volume, and the wholeness is better.
In order to reduce the volume, the second mounting base 102 is provided with a Y-axis guide rail 403 on a side wall close to the first mounting base 101, and a second driving mechanism is provided on the second mounting base 102, and the sliding table 400 is slidably mounted on the Y-axis guide rail 403 and driven by the second driving mechanism to move along the Y-axis direction. The Y-axis guide rails 403 are also provided with two parallel lines similarly to the X-axis guide rails 203, and the two Y-axis guide rails 403 are symmetrical with respect to the center line of the slide table 400 in the Z-axis direction, so that the slide table 400 is supported and guided by the Y-axis guide rails 403. The second driving mechanism comprises a Y-axis screw rod 402 and a second driving motor 401, the Y-axis screw rod 402 is arranged at one end, close to the second mounting seat 102, of the sliding table 400 in a penetrating mode and is in threaded connection with the sliding table 400, and the Y-axis screw rod 402 is located at the position of the middle line of the two Y-axis guide rails 403, so that the Y-axis screw rod is installed between the second mounting seat 102 and the sliding table 400 in a hidden mode. The second driving motor 401 is connected to the Y-axis lead screw 402 in a driving manner, so as to control the Y-axis lead screw 402 to rotate, and further control the sliding table 400 to move on the Y-axis guide rail 403. And the second driving motor 401 is preferably provided to the Y-axis screw 402
Further, one end of the sliding table 400, which is away from the Y-axis guide rail 403, is provided with a Z-axis guide rail 503, and a third driving mechanism is arranged on the sliding table 400, and the third revolving shaft box 500 is slidably mounted on the Z-axis guide rail 503 and can move along the Z-axis direction by being driven by the third driving mechanism. Similar to the X-axis guide 203, the Z-axis guide 503 is also provided with two parallel Z-axis guides 503, and the two Z-axis guides 503 are symmetrical with respect to the center line of the third swing axis case 500 in the Y-axis direction. The third driving mechanism comprises a Z-axis screw 502 and a third driving motor 501, the Z-axis screw 502 penetrates through one end, close to the sliding table 400, of the third rotating shaft box 500 and is in threaded connection with the third rotating shaft box 500, and the Z-axis screw 502 is located at the central line position of the two Z-axis guide rails 503. The third driving motor 501 is disposed above the Z-axis lead screw 502 and is in transmission connection with the Z-axis lead screw 502 to control the Z-axis lead screw 502 to rotate, so as to control the third rotating shaft box 500 to move on the Z-axis guide rail 503.
Set up like this, Y axle lead screw 402 and Z axle lead screw 502 all hidden installation is favorable to the wholeness of equipment to it sets up respectively in the central line position of acting on the object, is favorable to guaranteeing driven steady, increase of service life, and compact structure.
Obviously, the number of the X-axis guide rails 203, the Y-axis lead screws 402 and the Z-axis lead screws 502 may be set to other numbers, as long as the corresponding components can be stably guided and/or supported.
Furthermore, a workpiece clamping rotary table is arranged at the end part of the A shaft of the workpiece main shaft, so that a workpiece to be machined is clamped through the workpiece clamping rotary table. Since the workpiece clamping rotary table and the grinding wheel belong to the common knowledge, the specific structure of the workpiece clamping rotary table and the grinding wheel is not detailed here.
The first rotating shaft box body 300 is provided with a workpiece rotation driving motor for driving the workpiece spindle A to rotate, the second rotating shaft box body 200 is provided with a workpiece reversing driving motor for driving the rotating shaft B to rotate, and the third rotating shaft box body 500 is provided with a grinding wheel rotation driving motor for driving the grinding wheel spindle C to rotate. The workpiece rotation driving motor and the workpiece spindle A shaft, the workpiece reversing driving motor and the revolving shaft B shaft, and the grinding wheel rotation driving motor and the grinding wheel spindle C shaft can be in a motor direct connection mode, and can also be in a mode of combining the motor with gear or belt transmission to realize transmission. Similarly, the specific structure, installation, etc. thereof have been disclosed in the prior art, and belong to the common general knowledge, so the details thereof are not described in the present embodiment.
Meanwhile, the selection of the specific models and the parameter setting of the first driving motor 202, the second driving motor 401, the third driving motor 501, the workpiece rotation driving motor, the grinding wheel rotation driving motor and the workpiece reversing driving motor can be set according to the actual production requirements, so detailed description is omitted in this embodiment. And the specific selection of the torque motor or the linear motor or other motors with known structures can be flexibly selected, and is not detailed here.
In addition, a grinding wheel dressing device 900 is arranged on the second rotating shaft box 200, and the grinding wheel dressing device 900 is located at one end of the second rotating shaft box 200 close to the first rotating shaft box 300 and at the same time located at one end of the first rotating shaft box 300 close to the sliding table 400.
When the grinding wheel is required to be dressed, only the grinding wheel is required to be adjusted to the position above the grinding wheel dressing head, and the first rotating shaft box body 300 can be rotated to avoid a machining area.
In summary, according to the gear grinding machine with the structure, six-axis adjustment movement between the grinding wheel and the workpiece can be achieved through the arrangement of the structure, the C axis of the grinding wheel spindle is arranged along the Z axis direction, so that the machining of the spiral bevel gear can be achieved only by rotating the B axis of the revolving shaft to enable the A axis of the workpiece spindle to be horizontal, and when the left-handed machining needs to be switched to the right-handed machining, the B axis of the revolving shaft needs to be controlled to rotate 180 degrees.
For the gear grinding machine structure which is arranged by the grinding wheel and the workpiece in parallel in the market, the gear grinding machine in the embodiment arranges the grinding wheel and the workpiece up and down, so that the width of the equipment can be reduced, and the volume of the equipment can be reduced. In addition, in order to realize the movement adjustment in the X-axis direction shown in the figure, a longer guide structure needs to be arranged at the rear end of the machine body 100 away from the grinding wheel and the workpiece, and the machine body 100 needs to be provided with a heavier counterweight, so that the structure is large in size and weight, while the gear grinding machine in the embodiment is used for realizing the guide and driving structure of the grinding wheel and the workpiece to move along the X-axis and is arranged at the bottom of the second rotating shaft box body 200, and the machine body 100 does not need to be provided with a counterweight any more, so that the weight of the equipment can be reduced, and the cost of the equipment can be reduced. And further the power requirement of the corresponding driving mechanism is reduced, and the production cost is further reduced. The spatial layout of the structure setting of gear grinding machine in this embodiment is reasonable, compact, and the processing of levogyration, dextrorotation is switched efficient, and the practicality is strong.
In addition, the work piece is direct to be installed and clamped in cooling oil tank 600 top, and the coolant oil that uses can directly fall to in the cooling oil tank 600 in the gear grinding course of working, is favorable to keeping equipment clean and tidy, the recycle of being convenient for.
Example 2
The embodiment mainly uses embodiment 1, and the difference is that the first driving mechanism, the second driving mechanism and the third driving mechanism in the embodiment are not linear driving shaft structures in which a motor directly connects with a screw rod, but a belt pulley is arranged between the motor and the screw rod, and transmission connection is realized through a belt.
Example 3
The embodiment mainly adopts embodiment 1, and the difference is that the first driving mechanism, the second driving mechanism and the third driving mechanism in the embodiment are set as a linear motor, an air cylinder or an oil cylinder, so that the arrangement of a screw rod is reduced, and the purpose of structural optimization is achieved.
The above examples are only preferred embodiments of the present invention, and other embodiments of the present invention are possible. Those skilled in the art can make equivalent changes or substitutions without departing from the spirit of the present invention, and such equivalent changes or substitutions are included in the scope set forth in the claims of the present application.
Claims (6)
1. A numerically controlled gear grinding machine, comprising:
the mounting seat comprises a horizontal first mounting seat and a vertical second mounting seat;
the second rotating shaft box body can be movably arranged on the first mounting seat along the horizontal axis to the X axis and used for adjusting the distance between the second rotating shaft box body and the second mounting seat, a rotating shaft B axis which is vertical to the X axis along the horizontal direction is arranged on the second rotating shaft box body, the end part of the rotating shaft B axis extends to the outer side of the first mounting seat and is fixedly provided with a first rotating shaft box body, the first rotating shaft box body can rotate around the rotating shaft B axis, a workpiece spindle A axis which is vertical to the rotating shaft B axis is arranged on the first rotating shaft box body, and a workpiece is arranged at the end part of the workpiece spindle A axis;
the sliding table is movably arranged on the second mounting seat along the horizontal axial direction Y axis;
the third rotating shaft box body is movably arranged on the sliding table along the vertical axial direction Z axis and is positioned above the first rotating shaft box body, a vertical grinding wheel spindle C axis is arranged on the third rotating shaft box body, and a grinding wheel is arranged at the lower end of the grinding wheel spindle C axis;
and the cooling oil tank is arranged below the first rotating shaft box body along the X-axis direction.
2. The numerical control gear grinding machine according to claim 1, wherein the first mounting seat is provided with an X-axis guide rail, and the second rotating shaft box body is slidably mounted on the X-axis guide rail; the second mounting base is provided with a Y-axis guide rail, and the sliding table is slidably mounted on the Y-axis guide rail; the sliding table is provided with a Z-axis guide rail, and the third rotating shaft box body is slidably mounted on the Z-axis guide rail.
3. The digitally controlled gear grinding machine of claim 2 further comprising:
the first driving mechanism is arranged on the first mounting seat and is in transmission connection with the second rotating shaft box body so as to control the second rotating shaft box body to move along the X-axis guide rail;
the second driving mechanism is arranged on the second mounting seat and is in transmission connection with the sliding table so as to control the sliding table to move along the Y-axis guide rail;
and the third driving mechanism is arranged on the sliding table and is in transmission connection with the third rotating shaft box body so as to be used for controlling the third rotating shaft box body to move along the Z-axis guide rail.
4. The numerical control gear grinding machine according to claim 3, wherein the first, second and third driving mechanisms are motor screw mechanisms or linear motors or air cylinders or oil cylinders.
5. A numerically controlled gear grinding machine according to any one of claims 1 to 4, wherein said first rotary shaft housing is provided with a workpiece rotation driving motor for driving a workpiece spindle A to rotate, said second rotary shaft housing is provided with a workpiece reversing driving motor for driving a rotary shaft B to rotate, and said third rotary shaft housing is provided with a grinding wheel rotation driving motor for driving a grinding wheel spindle C to rotate.
6. The numerical control gear grinding machine according to any one of claims 1 to 4, wherein the second rotary shaft box body is vertically provided with a grinding wheel dressing device, and the grinding wheel dressing device is positioned at one end of the second rotary shaft box body close to the first rotary shaft box body and at the same time at one end of the first rotary shaft box body close to the sliding table.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921003939.8U CN210677203U (en) | 2019-07-01 | 2019-07-01 | Numerical control gear grinding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921003939.8U CN210677203U (en) | 2019-07-01 | 2019-07-01 | Numerical control gear grinding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210677203U true CN210677203U (en) | 2020-06-05 |
Family
ID=70890179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921003939.8U Active CN210677203U (en) | 2019-07-01 | 2019-07-01 | Numerical control gear grinding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210677203U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022021575A1 (en) * | 2020-07-29 | 2022-02-03 | 湖南中大创远数控装备有限公司 | Gear grinding machine |
-
2019
- 2019-07-01 CN CN201921003939.8U patent/CN210677203U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022021575A1 (en) * | 2020-07-29 | 2022-02-03 | 湖南中大创远数控装备有限公司 | Gear grinding machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201086222Y (en) | Six-shaft abrasive belt grinding machine | |
| CN109483381B (en) | Novel five-axis polishing machine | |
| CN102198529B (en) | Deep hole drilling machine | |
| CN101791725B (en) | Spiral bevel gear and hypoid gear forming method large-gear grinding machine | |
| CN102581332B (en) | Barrel boring device | |
| CN202271039U (en) | Numerical control arc tooth bevel gear milling machine | |
| US9878416B2 (en) | Grinding machine, particularly compact design centerless grinding machine | |
| CN202782416U (en) | Rotating head three-workstage carving machine | |
| CN210677199U (en) | Gear grinding machine | |
| WO2021098364A1 (en) | Numerically controlled machine tool for spiral bevel gear machining | |
| CN210677203U (en) | Numerical control gear grinding machine | |
| CN206185473U (en) | Turning and milling composite machine tool | |
| CN206185474U (en) | Compound lathe of turnning and milling with tool magazine | |
| CN203843614U (en) | Numerical control moving planer type double grinding head circle platform surface grinding machine | |
| CN108555399A (en) | A kind of gear cutting machine | |
| CN210677200U (en) | Numerical control gear milling machine | |
| CN209578798U (en) | A kind of double-station building-block machine | |
| CN205325339U (en) | Five lathes of whetting a knife | |
| CN111958058A (en) | Multi-station numerical control gear grinding machine | |
| CN111975135A (en) | Numerical control gear machining machine tool | |
| CN201579497U (en) | Grinding machine for forming gear of curved-tooth bevel gear and hypoid gear | |
| CN209036212U (en) | Special-shaped small precision part grinding device | |
| CN208584341U (en) | A kind of stone material continuous polishing machine | |
| CN114178960B (en) | High-precision double-sided numerically controlled grinder machine tool | |
| CN2838853Y (en) | Semi-automatic micro-ball bearing ring multipurpose grinding machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |