CNC precision internal thread grinding machine

Abstract

The present invention provides a CNC precision internal thread grinder, which belongs to the technical field of garbage crushing, and includes a Z-axis feed motor, a head frame spindle and a first synchronous pulley. The bottom of the Z-axis feed motor is provided with a head frame spindle, and the head frame spindle is fixedly connected to the Z-axis feed motor. The upper and lower ends of the cross section of the head frame spindle are provided with first synchronous pulleys, and the first synchronous pulley is fixedly connected to the head frame spindle. This CNC precision internal thread grinder has a stable structure, and the grinding wheel can be firmly fixed inside the workbench, thereby avoiding the grinding wheel from popping out of the workbench when the device is grinding at a high speed, thereby avoiding more serious safety accidents in the reproduction process, and the potential safety hazards are small, which is conducive to practical use. In addition, the transmission system of the thread processing machine tool works in an integrated manner, so that the device can reach the kinetic energy required for grinding products without long-term preheating during use, saving a lot of time, which is conducive to practical use.

Description

Technical Field

[0001] The invention relates to the technical field of thread grinders, in particular to a numerically controlled precision internal thread grinder. Background Art

[0002] A thread grinder is a thread processing machine tool that uses a formed grinding wheel as a grinding tool to process precision threads. Thread grinders are mainly used in production workshops and tool workshops in the machinery manufacturing industry, and are most commonly used in workshops in tool factories and measuring tool factories that produce thread processing tools and thread measuring tools.

[0003] However, the existing CNC precision internal thread grinder cannot be firmly fixed inside the workbench during actual use, which makes it easy for the grinder to pop out of the workbench when the device is grinding at high speed, which can easily cause serious safety accidents. The safety hazard is large and is not conducive to actual use. In addition, most thread processing machine tool transmission systems on the market work independently, so that the device needs to be preheated for a long time during actual use to reach the kinetic energy required for grinding the product, which wastes a lot of time and is not conducive to actual use.

[0004] Therefore, it is necessary to upgrade and transform the existing CNC precision internal thread grinder to overcome the existing problems and shortcomings. Summary of the invention

[0005] The present invention aims to solve the problem that the grinding wheel of the existing CNC precision internal thread grinder cannot be firmly fixed inside the workbench during actual use, which causes the grinding wheel to easily pop out of the workbench when the device is grinding at a high speed, which is easy to cause a relatively serious safety accident, and the safety hazard is large, which is not conducive to actual use. In addition, the transmission system of most thread processing machines on the market works independently, so that the device needs to be preheated for a long time during actual use to reach the kinetic energy required for grinding the product, which delays a lot of time and is not conducive to actual use. A CNC precision internal thread grinder is provided. By setting the head frame, chuck, dresser electric spindle, workbench and grinder, the grinding wheel machine can be firmly fixed inside the workbench when the device is actually used, thereby effectively avoiding the grinding wheel machine from popping out of the workbench when the device is performing high-speed grinding, and thus effectively avoiding more serious safety accidents in the reproduction process. The safety hazard is small, which is conducive to actual use. The transmission system of the thread processing machine tool works in an integrated manner, so that the device can reach the kinetic energy required for grinding the product without long-term preheating during actual use, thereby saving a lot of time and being conducive to actual use.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a CNC precision internal thread grinding machine, comprising a Z-axis feed motor, a head frame spindle and a first synchronous pulley, wherein the bottom of the Z-axis feed motor is provided with a head frame spindle, and the head frame spindle is fixedly connected to the Z-axis feed motor, the upper and lower ends of the cross-section of the head frame spindle are provided with first synchronous pulleys, and the first synchronous pulley is fixedly connected to the head frame spindle, the upper end of the cross-section of the head frame spindle is provided with a spindle rotating motor, and the spindle rotating motor is movably connected to the head frame spindle, the upper and lower ends of the right side of the cross-section of the spindle rotating motor are provided with second synchronous pulleys, and the second synchronous pulley is movably connected to the spindle rotating motor, the surface of the second synchronous pulley is provided with a first synchronous belt, and the first synchronous belt and the second synchronous belt pulley are movably connected. A headstock is provided in the middle of the top of the cross-section of the headstock spindle, and the bottom of the headstock is fixedly connected to the headstock spindle, a chuck is provided on the right side of the cross-section of the headstock spindle, and the chuck is inlaid and connected to the headstock spindle, a third synchronous pulley is provided on the right side of the chuck, and the third synchronous pulley is movably connected to the chuck, a second synchronous belt is provided at the upper and lower ends of the third synchronous pulley, and the second synchronous belt is movably connected to the third synchronous pulley, a fourth synchronous pulley is provided at the upper end of the second synchronous belt, and the fourth synchronous pulley is movably connected to the second synchronous belt, a W-axis feed motor is provided on the right side of the third synchronous pulley, and the left side of the W-axis feed motor is movably connected to the third synchronous pulley, a dresser electric spindle is provided on the top of the second synchronous belt, and the dresser electric spindle is connected to the second synchronous belt The step belt is movably connected, a U-axis slide is provided on the top of the dresser electric spindle, and the U-axis slide is fixedly connected to the dresser electric spindle, a U-axis screw is provided on the upper right end of the U-axis slide, and the U-axis screw is fixedly connected to the U-axis slide, a grinding wheel electric spindle is provided on the lower right end of the U-axis screw, and the grinding wheel electric spindle is fixedly connected to the U-axis screw, an X-axis feed motor is provided on the lower left end of the cross-section of the chuck, and the right side of the X-axis feed motor is movably connected to the chuck, an X-axis slide is provided on the right side of the cross-section of the X-axis feed motor, and the X-axis slide is fixedly connected to the X-axis feed motor, a rotating body is provided on the top of the X-axis slide, and the rotating body is movably connected to the X-axis slide, a W-axis slide is provided on the right side of the top of the rotating body, and the bottom of the W-axis slide is movably connected to the rotating body, the A U-axis feed motor is provided on the top of the W-axis carriage, and the U-axis feed motor is movably connected to the W-axis carriage, a fifth synchronous pulley is provided on the top of the U-axis feed motor, and the third synchronous belt is movably connected to the fifth synchronous pulley, a sixth synchronous pulley is provided on the right side of the third synchronous belt, and the sixth synchronous pulley is movably connected to the third synchronous belt, a C-axis spindle is provided on the right side of the cross-section of the W-axis carriage, and the C-axis spindle is fixedly connected to the W-axis carriage, a workbench is provided on the surface of the X-axis carriage, and the workbench is fixedly connected to the X-axis carriage, a Z-axis lead screw is provided on the right side of the X-axis carriage, and the Z-axis lead screw is movably connected to the X-axis carriage, a W-axis lead screw is provided at the bottom of the Z-axis lead screw, and the W-axis lead screw is movably connected to the Z-axis lead screw, and a cooling oil tank filter device is provided on the right side of the workbench,The cooling oil tank filter device is fixedly connected to the workbench, a grinding wheel machine is arranged inside the workbench, and the grinding wheel machine is embedded and connected to the workbench.

[0007] Preferably, the surface of the grinding machine is provided with sharp fixed teeth distributed in a circumferential shape, and a fixed shaft with threads is provided in the middle of the grinding machine.

[0008] Preferably, the five synchronous pulleys and the three synchronous belts are connected to each other in a rolling manner, and the first synchronous pulley fits tightly to the upper and lower ends of the head frame main shaft.

[0009] Preferably, the right side of the cross section of the chuck is concave, and the size of the concave surface matches the diameter of the grinding wheel machine inside the workbench.

[0010] Preferably, the Z-axis feed motor and the spindle rotation motor are parallel to each other, and the rear ends of the Z-axis feed motor and the spindle rotation motor are connected by a first synchronous belt.

[0011] Preferably, the workbench surface is provided with four circular positioning holes, and the positioning holes are parallel to the openings on the grinding wheel machine surface.

[0012] Preferably, a Y-shaped oil pipe is provided at the bottom of the cooling oil tank filter device, and the oil pipe is connected to the workbench. Beneficial Effects

[0013] (1) The CNC precision internal thread grinder has improved its structure so that the grinding wheel can be firmly fixed inside the workbench during actual use, thereby effectively preventing the grinding wheel from popping out of the workbench during high-speed grinding, thereby effectively avoiding major safety accidents during the reproduction process. The potential safety hazards are relatively small, which is conducive to actual use. In addition, the transmission system of the thread processing machine tool is integrated, so that the device can reach the kinetic energy required for grinding the product without long-term preheating during actual use, thereby saving a lot of time and facilitating actual use.

[0014] (2) The advantages of this type of CNC precision internal thread grinder are: since there are four circular positioning holes on the surface of the worktable, and the positioning holes are parallel to the openings on the surface of the grinding wheel machine, the grinding wheel machine can be firmly fixed inside the worktable through the openings, thereby effectively preventing the grinding wheel machine from popping out of the worktable when the device is performing high-speed grinding, thereby effectively avoiding more serious safety accidents during the reproduction process, with less safety hazards, which is conducive to practical use.

[0015] (3) Secondly: Since the five synchronous pulleys and the three synchronous belts are connected and rolling with each other, and the first synchronous pulley fits tightly against the upper and lower ends of the headstock spindle, the transmission system of the thread processing machine tool works in an integrated manner. Therefore, the device does not need to be preheated for a long time during actual use to reach the kinetic energy required for grinding the product, thereby saving a lot of time and facilitating actual use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 It is a side structural schematic diagram of the device of the present invention.

[0019] Figure 3 It is a schematic diagram of the top structure of the device of the present invention.

[0020] Figure 4 It is a schematic diagram of the structure of the sanding machine of the present invention.

[0021] Figure 1-4 In: 1. Z-axis feed motor; 2. Headstock spindle; 3. First synchronous pulley; 4. First synchronous belt; 5. Spindle rotation motor; 6. Second synchronous pulley; 7. Headstock; 8. Chuck; 9. Third synchronous pulley; 10. Second synchronous belt; 11. Fourth synchronous pulley; 12. W-axis feed motor; 13. Dresser electric spindle; 14. U-axis slide; 15. U-axis lead screw; 16. Grinding wheel electric spindle; 17. X-axis feed motor; 18. X-axis slide; 19. Rotating body; 20. W-axis slide; 21. U-axis feed motor; 22. Fifth synchronous pulley; 23. Third synchronous belt; 24. Sixth synchronous pulley; 25. C-axis spindle; 26. Workbench; 27. Z-axis lead screw; 28. W-axis lead screw; 29. ​​Cooling oil tank filter; 30. Grinding machine; 3001, fixed axis. DETAILED DESCRIPTION

[0022] In order to make the purpose, 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 in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0023] Example: See Figure 1-4 ，

[0024] A CNC precision internal thread grinding machine provided in the present embodiment comprises a Z-axis feed motor 1, a head frame spindle 2 and a first synchronous pulley 3. The bottom of the Z-axis feed motor 1 is provided with a head frame spindle 2, and the head frame spindle 2 is fixedly connected to the Z-axis feed motor 1. The upper and lower ends of the cross section of the head frame spindle 2 are provided with a first synchronous pulley 3, and the first synchronous pulley 3 is fixedly connected to the head frame spindle 2. The upper end of the cross section of the head frame spindle 2 is provided with a spindle rotating motor 5, and the spindle rotating motor 5 is movably connected to the head frame spindle 2. The upper and lower ends of the right side of the cross section of the spindle rotating motor 5 are provided with a second synchronous pulley 6, and the second synchronous pulley 6 is movably connected to the spindle rotating motor 5. The surface of the second synchronous pulley 6 is provided with a first synchronous belt 4, and the first synchronous belt 4 is connected to the second synchronous pulley 6. A head frame 7 is provided in the middle of the top of the cross-section of the head frame spindle 2, and the bottom of the head frame 7 is fixedly connected to the head frame spindle 2, a chuck 8 is provided on the right side of the cross-section of the head frame spindle 2, and the chuck 8 is inlaid and connected to the head frame spindle 2, a third synchronous pulley 9 is provided on the right side of the chuck 8, and the third synchronous pulley 9 is movably connected to the chuck 8, a second synchronous belt 10 is provided at both upper and lower ends of the third synchronous pulley 9, and the second synchronous belt 10 is movably connected to the third synchronous pulley 9, a fourth synchronous pulley 11 is provided at the upper end of the second synchronous belt 10, and the fourth synchronous pulley 11 is movably connected to the second synchronous belt 10, a W-axis feed motor 12 is provided on the right side of the third synchronous pulley 9, and the left side of the W-axis feed motor 12 is movably connected to the third synchronous pulley 9, the top of the second synchronous belt 10 A dresser electric spindle 13 is provided at the top of the dresser electric spindle 13, and the U-axis slide 14 is fixedly connected to the dresser electric spindle 13, a U-axis lead screw 15 is provided at the upper right end of the U-axis slide 14, and the U-axis lead screw 15 is fixedly connected to the U-axis slide 14, a grinding wheel electric spindle 16 is provided at the lower right end of the U-axis lead screw 15, and the grinding wheel electric spindle 16 is fixedly connected to the U-axis lead screw 15, an X-axis feed motor 17 is provided at the lower left end of the cross section of the chuck 8, and the right side of the X-axis feed motor 17 is movably connected to the chuck 8, an X-axis slide 18 is provided on the right side of the cross section of the X-axis feed motor 17, and the X-axis slide 18 is fixedly connected to the X-axis feed motor 17, and the top of the X-axis slide 18 A rotating body 19 is provided, and the rotating body 19 is movably connected to the X-axis carriage 18, a W-axis carriage 20 is provided on the right side of the top of the rotating body 19, and the bottom of the W-axis carriage 20 is movably connected to the rotating body 19, a U-axis feed motor 21 is provided on the top of the W-axis carriage 20, and the U-axis feed motor 21 is movably connected to the W-axis carriage 20, a fifth synchronous pulley 22 is provided on the top of the U-axis feed motor 21, a third synchronous belt 23 is movably connected to the fifth synchronous pulley 22, a sixth synchronous pulley 24 is provided on the right side of the third synchronous belt 23, and the sixth synchronous pulley 24 is movably connected to the third synchronous belt 23, a C-axis spindle 25 is provided on the right side of the cross section of the W-axis carriage 20, and the C-axis spindle 25 is fixedly connected to the W-axis carriage 20, and a workbench 26 is provided on the surface of the X-axis carriage 18,The workbench 26 is fixedly connected to the X-axis carriage 18, a Z-axis screw 27 is arranged on the right side of the X-axis carriage 18, and the Z-axis screw 27 is movably connected to the X-axis carriage 18, a W-axis screw 28 is arranged at the bottom of the Z-axis screw 27, and the W-axis screw 28 is movably connected to the Z-axis screw 27, a cooling oil tank filter device 29 is arranged on the right side of the workbench 26, and the cooling oil tank filter device 29 is fixedly connected to the workbench 26, a grinding wheel machine 30 is arranged inside the workbench 26, and the grinding wheel machine 30 is inlaid and connected to the workbench 26.

[0025] Furthermore, the surface of the grinding wheel machine 30 is provided with sharp fixed teeth distributed in a circular shape, and a fixed shaft 3001 with threads is provided in the middle of the grinding wheel machine 30;

[0026] In this embodiment, through this design, the grinding machine 30 can perform emergency braking through the sharp fixed teeth when rotating at high speed, thereby avoiding errors in grinding and improving the accuracy of the device. The grinding tool can be fixed in the fixed shaft 3001 by rotation, so that the grinding tool will not loosen during grinding.

[0027] Furthermore, the five synchronous pulleys and the three synchronous belts are connected to each other in a rolling manner, and the first synchronous pulley 3 is closely fitted to the upper and lower ends of the head frame main shaft 2;

[0028] In this embodiment, through this design, the transmission system of the thread processing machine tool works in an integrated manner, so that during actual use, the device does not need to be preheated for a long time to reach the kinetic energy required for grinding the product, thereby saving a lot of time and facilitating actual use.

[0029] Furthermore, the right side of the cross section of the chuck 8 is concave, and the size of the concave surface matches the diameter of the grinder 30 inside the workbench 26;

[0030] In this embodiment, through this design, the grinder 30 can be embedded in the chuck 8 as the grinding depth increases, avoiding sparks from splashing during grinding and causing burns to surrounding workers, which is beneficial to practical use.

[0031] Furthermore, the Z-axis feed motor 1 and the spindle rotation motor 5 are parallel to each other, and the rear ends of the Z-axis feed motor 1 and the spindle rotation motor 5 are connected by a first synchronous belt 4;

[0032] In this embodiment, through this design, the kinetic energy generated by the Z-axis feed motor 1 can be directly transmitted to the main shaft rotation motor 5 through the first synchronous belt 4, and then the main rotation motor 5 transmits the kinetic energy to the workbench 26, so that the device can efficiently grind the processed products.

[0033] Furthermore, the surface of the workbench 26 is provided with four circular positioning holes, and the positioning holes are parallel to the openings on the surface of the grinding wheel machine 30;

[0034] In this embodiment, through this design, the grinding machine 30 can be firmly fixed inside the workbench 26 through the opening, thereby effectively preventing the grinding machine 30 from popping out of the workbench 26 when the device is performing high-speed grinding, thereby effectively avoiding more serious safety accidents during the reproduction process, with less potential safety hazards, which is conducive to practical use.

[0035] Furthermore, a Y-shaped oil pipe is provided at the bottom of the cooling oil tank filter device 29, and the oil pipe is connected to the workbench 26;

[0036] In this embodiment, through this design, the cooling oil tank filter device 29 can supply cooling oil to the workbench 26 through the Y-shaped oil pipe, thereby effectively avoiding overheating of the workbench 26 during long-term operation and causing device failure, which is beneficial to ensuring the use efficiency of the device.

[0037] Working principle:

[0038] When using a CNC precision internal thread grinder provided by this embodiment, first check the tightness of the connection between the various components of this product, and then place this device on a horizontal dry ground. The grinding wheel machine 30 can perform emergency braking through the sharp fixed teeth when rotating at high speed, so as to avoid errors in grinding, thereby improving the accuracy of the device, and the grinding tool can be fixed in the fixed shaft 3001 by rotation, so that the grinding tool will not loosen during grinding, and the grinding wheel machine 30 can be firmly fixed inside the workbench 26 through the opening, thereby effectively avoiding the device from grinding when grinding at high speed. The turbine 30 pops out from the workbench 26, thereby effectively avoiding major safety accidents during the reproduction process, with relatively small safety hazards, and the thread processing machine tool transmission system is integrated, so that the device does not need to be preheated for a long time during actual use to reach the kinetic energy required for grinding the product, thereby saving a lot of time, and the cooling oil tank filter device 29 can infuse cooling oil to the workbench 26 through the Y-shaped oil pipe, thereby effectively avoiding overheating of the workbench 26 during long-term work and causing failure of the device, which is beneficial to ensuring the use efficiency of the device.

[0039] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A CNC precision internal thread grinding machine, comprising a Z-axis feed motor (1), a headstock spindle (2) and a first synchronous pulley (3), characterized in that: A head frame spindle (2) is provided at the bottom of the Z-axis feed motor (1), and the head frame spindle (2) is fixedly connected to the Z-axis feed motor (1); first synchronous pulleys (3) are provided at both upper and lower ends of the cross section of the head frame spindle (2), and the first synchronous pulley (3) is fixedly connected to the head frame spindle (2); a spindle rotating motor (5) is provided at the upper end of the cross section of the head frame spindle (2), and the spindle rotating motor (5) is movably connected to the head frame spindle (2); second synchronous pulleys (6) are provided at both upper and lower ends of the right side of the cross section of the spindle rotating motor (5), and the second synchronous pulley (6) is movably connected to the spindle rotating motor (5); a first synchronous belt (4) is provided on the surface of the second synchronous pulley (6), and the first synchronous belt (4) is connected to the The second synchronous belt pulley (6) is movably sleeved, a head frame (7) is provided in the middle of the top of the cross section of the head frame main shaft (2), and the bottom of the head frame (7) is fixedly connected to the head frame main shaft (2), a chuck (8) is provided on the right side of the cross section of the head frame main shaft (2), and the chuck (8) is embedded and connected to the head frame main shaft (2), a third synchronous belt pulley (9) is provided on the right side of the chuck (8), and the third synchronous belt pulley (9) is movably connected to the chuck (8), the upper and lower ends of the third synchronous belt pulley (9) are provided with a second synchronous belt (10), and the second synchronous belt (10) is movably sleeved with the third synchronous belt pulley (9), and the upper end of the second synchronous belt (10) is provided with a fourth synchronous belt pulley (11), and the fourth synchronous belt pulley (11) is connected to the second synchronous belt (1 0) movably connected, a W-axis feed motor (12) is provided on the right side of the third synchronous pulley (9), and the left side of the W-axis feed motor (12) is movably connected to the third synchronous pulley (9), a dresser electric spindle (13) is provided on the top of the second synchronous belt (10), and the dresser electric spindle (13) is movably connected to the second synchronous belt (10), a U-axis carriage (14) is provided on the top of the dresser electric spindle (13), and the U-axis carriage (14) is fixedly connected to the dresser electric spindle (13), a U-axis lead screw (15) is provided at the upper right end of the U-axis carriage (14), and the U-axis lead screw (15) is fixedly connected to the U-axis carriage (14), a grinding wheel electric spindle (16) is provided at the lower right end of the U-axis lead screw (15), and the grinding wheel electric spindle The shaft (16) is fixedly connected to the U-axis lead screw (15); an X-axis feed motor (17) is provided at the lower left end of the cross section of the chuck (8); and the right side of the X-axis feed motor (17) is movably connected to the chuck (8); an X-axis slide (18) is provided on the right side of the cross section of the X-axis feed motor (17); and the X-axis slide (18) is fixedly connected to the X-axis feed motor (17); a rotating body (19) is provided on the top of the X-axis slide (18); and the rotating body (19) is movably connected to the X-axis slide (18); a W-axis slide (20) is provided on the right side of the top of the rotating body (19); and the bottom of the W-axis slide (20) is movably connected to the rotating body (19); and a U-axis feed motor (21) is provided on the top of the W-axis slide (20);The U-axis feed motor (21) is movably connected to the W-axis carriage (20); a fifth synchronous pulley (22) is provided on the top of the U-axis feed motor (21); and the third synchronous belt (23) is movably sleeved with the fifth synchronous pulley (22); a sixth synchronous pulley (24) is provided on the right side of the third synchronous belt (23); and the sixth synchronous pulley (24) is movably sleeved with the third synchronous belt (23); a C-axis spindle (25) is provided on the right side of the cross section of the W-axis carriage (20); and the C-axis spindle (25) is fixedly connected to the W-axis carriage (20); a workbench (26) is provided on the surface of the X-axis carriage (18); and the workbench (26) is fixedly connected to the X-axis carriage (18); a Z-axis lead screw (27) is provided on the right side of the X-axis carriage (18); and the Z-axis lead screw (27) is rotatably connected to the X-axis carriage (18); 8) movable connection, the bottom of the Z-axis screw (27) is provided with a W-axis screw (28), and the W-axis screw (28) is movably connected to the Z-axis screw (27), the right side of the workbench (26) is provided with a cooling oil tank filter device (29), and the cooling oil tank filter device (29) is fixedly connected to the workbench (26), a grinding wheel (30) is provided inside the workbench (26), and the grinding wheel (30) is embedded and connected to the workbench (26); the five synchronous pulleys and the three synchronous belts are connected to each other in a rolling state, and the first synchronous pulley (3) is tightly fitted to the upper and lower ends of the head frame spindle (2); the Z-axis feed motor (1) and the spindle rotation motor (5) are parallel, and the rear ends of the Z-axis feed motor (1) and the spindle rotation motor (5) are connected by the first synchronous belt (4). , 2. The CNC precision internal thread grinding machine according to claim 1, characterized in that: The surface of the grinding wheel machine (30) is provided with sharp fixed teeth distributed in a circular shape, and a fixed shaft (3001) with threads is provided in the middle of the grinding wheel machine (30).

3. The CNC precision internal thread grinding machine according to claim 1, characterized in that: The right side of the cross section of the chuck (8) is concave, and the size of the concave surface matches the diameter of the grinding wheel machine (30) inside the workbench (26).

4. The CNC precision internal thread grinding machine according to claim 1, characterized in that: The surface of the workbench (26) is provided with four circular positioning holes, and the positioning holes are parallel to the openings on the surface of the grinding wheel machine (30).

5. The CNC precision internal thread grinding machine according to claim 1, characterized in that: A Y-shaped oil pipe is provided at the bottom of the cooling oil tank filter device (29), and the oil pipe is connected to the workbench (26).

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