Rotary positioning machining device of numerical control lathe

Abstract

The invention relates to the technical field of numerical control lathes, and discloses a rotary positioning machining device of a numerical control lathe, which comprises a lathe body, a positioning part mounted in the lathe body and used for positioning machining positions of workpieces with different sizes, and a clamping part mounted on the positioning part and used for clamping different rotating speed correction axial forces of the workpieces. The compensation part is installed on the positioning part, the first motor is adopted to drive the threaded rod to drive the sliding block and the case to move, and compared with the problem that a traditional threaded lead screw is prone to fatigue due to long-term stress, precision is reduced, and jamming is caused, the compensation part is driven by the linear motor to work after the first motor is shut down; the compensation rod and the balls enter the circulating groove of the three-jaw chuck to form triangular limiting, the balls roll in the circulating groove, abrasion of cutting force to the three-jaw chuck and the output shaft of the second motor is effectively overcome, the clamping stability and the rotating stability of the three-jaw chuck under long-term operation are guaranteed, deviation and shaking are avoided, and therefore the positioning precision is improved.

Description

Technical Field

[0001] The invention relates to the technical field of numerically controlled lathes, in particular to a rotary positioning processing device for numerically controlled lathes. Background Art

[0002] In the field of modern mechanical processing, CNC lathes play an extremely important role and are widely used in the processing and manufacturing of rotating parts such as shafts and discs. As the manufacturing industry continues to increase its requirements for product accuracy, complexity and production efficiency.

[0003] According to the Chinese patent publication number CN209439462U, the patent relates to a rotary positioning type CNC lathe cutting fixture, including a base body and a worm, a worm is installed inside the base body, and a worm wheel is arranged on the outside of the worm, and a fixed support column is fixed inside the worm wheel, a support rod is connected inside the fixed support column, and a fixed frame is fixed on the top of the support rod, a limited groove is fixed on the inner wall of the fixed frame, and a screw rod and a moving block are arranged, and the connection mode of the screw rod and the moving block is a threaded connection, so that the moving block is well driven to move through the rotation of the screw rod, and the three-jaw chuck is well driven to move through the movement of the moving block, so that the three-jaw chuck can well drive the workpiece to move, so that the cutting end of the workpiece and the cutting tool are well positioned, so that the cutting tool can cut again.

[0004] However, in CNC lathe processing, it is a common method to use a threaded screw to rotate and drive the fixture to enter the appropriate turning position for positioning. After long-term turning operations, the thread is fatigued due to long-term force, resulting in thread pitch distortion, which will not only cause the positioning accuracy to become lower and lower, but even cause positioning stuck problems, thereby increasing maintenance costs. Therefore, a rotary positioning processing device for CNC lathes is proposed to solve the above-mentioned problems. Summary of the invention

[0005] 1. Technical issues to be resolved In view of the deficiencies in the prior art, the present invention provides a rotary positioning processing device for a CNC lathe, which solves the problem that the threaded screw is fatigued by the cutting force for a long time, which reduces the positioning accuracy and even causes positioning jamming, thereby increasing the maintenance cost.

[0006] (II) Technical solution To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a rotation positioning processing device for a CNC lathe, comprising a lathe body, a positioning part installed in the lathe body, and used to locate the processing position of workpieces of different sizes, a clamping part installed on the positioning part, and used to correct the axial force under different rotation speeds of the clamping workpiece, a compensation part installed on the positioning part, and used to compensate for the deviation caused by the cutting force of the workpiece, and a protective part installed in the lathe body, and used to isolate chips at the synchronous processing position.

[0007] Preferably, the positioning portion includes a slide, which is installed in the turning area of ​​the lathe body, a slide groove is provided on the top of the slide, a motor 1 is installed on the side wall of the slide, a threaded rod is fixedly connected to the output shaft of the motor 1, an end of the threaded rod movably penetrates into the slide groove and is rotatably connected to the inner wall of the slide groove, a slider is threadedly sleeved on the outer wall of the threaded rod, and the slider is slidably connected to the inner wall of the slide groove, a chassis is installed on the top of the slider, and the bottom of the outer wall of the chassis fits with the top of the slide.

[0008] Preferably, the clamping part is arranged on the chassis, and the clamping part includes a three-jaw chuck, and a circulation groove is opened on the side of the three-jaw chuck away from the clamping jaws. The circulation groove is an annular structure and the inner wall is an arc structure. An open disc is installed in the center of the side of the three-jaw chuck away from the clamping jaws.

[0009] Preferably, motor 2 is installed inside the chassis, and the output shaft of motor 2 movably passes through the chassis. The perforated disk and the three-jaw chuck are fixedly mounted on the through-end of the output shaft of motor 2. The center of the output shaft of motor 2 is aligned with the center of the perforated disk and the center of the three-jaw chuck. A photoelectric sensor is installed on the through-end of the output shaft of motor 2, and the photoelectric sensor is located inside the perforated disk.

[0010] Preferably, the compensation part includes two linear motors, and the two linear motors are symmetrically installed on both sides of the slide, and L-shaped sliders are installed on the mover ends of the two linear motors. A support plate is fixedly connected between the two L-shaped sliders, and a pressure sensor is installed on the side of the support plate close to the chassis, and a compensation plate is installed on the pressure sensor, and the compensation plate is fitted between the chassis.

[0011] Preferably, the compensation part also includes compensation rods, and there are three compensation rods evenly distributed on the compensation plate. The ends of the three compensation rods are fixedly connected to the compensation plate, and balls are installed on the other ends of the three compensation rods, and each ball fits against the inner wall of the circulation groove.

[0012] Preferably, the protective part includes two mounting plates, both of which are installed in the turning area of ​​the lathe body, a protective cover is installed on the side wall of one of the mounting plates, a winding roller is rotatably connected between the two mounting plates, one end of the winding roller is movably inserted into the protective cover, a torsion spring is fixedly sleeved on the penetrating end of the winding roller, the torsion spring is elastically connected between the inner wall of the protective cover and the adjacent mounting plate, and a steel belt is wound around the winding roller.

[0013] Preferably, the movable end of the steel belt is fixedly connected to the outer wall of the chassis, and the bottom of the steel belt fits with the top of the slide.

[0014] Preferably, the workbench in the turning area of ​​the lathe body is installed with a baffle, and scrapers are integrally connected to both sides of the baffle, the two scrapers are inclined and symmetrical to each other, and the bottoms of the two scrapers are in contact with the top of the steel belt.

[0015] Preferably, a material collecting trough is provided on the workbench in the turning area of ​​the lathe body, the material collecting trough is located below the movable end of the steel belt, and the center line of the material collecting trough is aligned with the center line of the baffle.

[0016] (III) Beneficial effects Compared with the prior art, the present invention provides a rotary positioning processing device for a CNC lathe, which has the following beneficial effects: 1. The rotary positioning processing device of the CNC lathe adopts a motor to drive the threaded rod to drive the slider and the chassis to move. Compared with the traditional threaded screw that is easy to fatigue due to long-term force, resulting in reduced accuracy and jamming, this device drives the compensation part to work through a linear motor after the motor stops. The compensation rod and the ball enter the circulation groove of the three-jaw chuck to form a triangular limit. The ball rolls in the circulation groove, effectively overcoming the wear of the cutting force on the three-jaw chuck and the output shaft of the motor 2, ensuring the clamping stability and rotation stability of the three-jaw chuck under long-term operation, avoiding offset and shaking, and thus improving positioning accuracy.

[0017] 2. The rotary positioning processing device of the CNC lathe adopts a photoelectric sensor installed at the through-end of the output shaft of the second motor. The perforated disk rotates with the second motor, and the rotation speed is calculated by the photoelectric sensor. At high speed, the photoelectric sensor prompts the pressure sensor to start. When the tool generates resistance when cutting the workpiece, the ball rolls in the circulation groove to overcome the resistance, and the axial force of the output shaft of the second motor is corrected to the correct position, avoiding damage to the output shaft of the second motor caused by long-term cutting operations, thereby preventing shaking and deviation, and extending the service life of the second motor and related components.

[0018] 3. The rotary positioning processing device of the CNC lathe adopts that when facing the cutting of larger or harder workpieces, the cutting force increases, which increases the resistance of the three-jaw chuck, the second output shaft of the motor and the chassis. The compensation plate and the compensation rod can sense the pressure change and drive the linear motor to work through electrical signals. The linear motor drives the support plate to push the compensation plate to provide a force equal to and opposite to the resistance to pull the chassis. The compensation rod resists the three-jaw chuck to compensate for the cutting force and prevent the cutting force from causing destructive damage to the second output shaft of the motor and the threaded rod, thereby improving the overall durability of the equipment and reducing maintenance costs.

[0019] 4. The rotary positioning processing device of the CNC lathe adopts a steel belt of the protective part to always maintain tension under the action of the torsion spring. Its movable end is connected to the chassis, which can effectively prevent the debris in the turning operation area from getting stuck in the equipment gap. The scrapers on both sides of the baffle of the turning area workbench fit with the steel belt, and the metal debris is automatically scraped off during the winding and unwinding process of the steel belt. The debris falls into the collecting trough for recovery, realizing automatic scraping of residual debris, improving the convenience of use, and reducing the pressure of manual cleaning. At the same time, the steel belt is made of thin steel material, with good winding and releasing effects, good steel surface hardness and smoothness, and reduced metal debris adhesion.

[0020] 5. The rotary positioning processing device of the CNC lathe adopts a three-jaw chuck in the clamping part to adapt to the clamping requirements of workpieces of different sizes. With the drive of the positioning part motor 1, the workpiece can be easily positioned to the appropriate processing position. The lathe body can be equipped with a robotic arm to cooperate with the tool operation, which enhances the processing flexibility and is suitable for a variety of processing scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a rotary positioning processing device for a CNC lathe proposed by the present invention; Figure 2 This is a connection diagram of a positioning part, a clamping part, a compensation part and a protection part of a rotary positioning processing device for a CNC lathe proposed by the present invention; Figure 3 It is a structural schematic diagram of a positioning part of a rotary positioning processing device of a CNC lathe proposed by the present invention; Figure 4 This is a structural schematic diagram of a protective part of a rotary positioning processing device of a CNC lathe proposed by the present invention; Figure 5 It is a structural schematic diagram of a clamping part and a compensating part of a rotary positioning processing device for a CNC lathe proposed by the present invention; Figure 6 This is an enlarged view of a compensation rod and a ball of a rotary positioning processing device of a CNC lathe proposed by the present invention; Figure 7 This is a schematic diagram of the internal structure of a lathe body of a rotation positioning processing device for a CNC lathe proposed by the present invention.

[0022] In the figure: 1. lathe body; 2. positioning part; 21. slide; 22. slide; 23. motor 1; 24. threaded rod; 25. chassis; 3. clamping part; 31. three-jaw chuck; 32. circulation groove; 33. perforated disc; 4. compensation part; 41. linear motor; 42. L-shaped slider; 43. support plate; 44. pressure sensor; 45. compensation plate; 46. compensation rod; 47. ball bearing; 5. protection part; 51. mounting plate; 52. protective cover; 53. winding roller; 54. torsion spring; 55. steel belt; 6. baffle; 7. aggregate trough. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figure 1-7 The present invention provides a technical solution: a rotary positioning processing device for a CNC lathe, comprising a lathe body 1, the lathe adopts a CK61508 model characteristic CNC machine tool, and is used for cutting workpieces. The positioning part 2 of this case is installed in the lathe body 1, and is used to locate the processing position of workpieces of different sizes. The clamping part 3 of this case is installed on the positioning part 2, and is used to correct the axial force under different rotation speeds of the clamping workpiece. The compensation part 4 of this case is installed on the positioning part 2, and is used to compensate and correct the offset caused by the cutting force of the workpiece. The protective part 5 of this case is installed in the lathe body 1, and is used to isolate chips at the synchronous processing position.

[0025] In the present invention, a common threaded screw is used to rotate for positioning and adjusting the processing position. The positioning part 2 in this case includes a slide 21, which is installed in the turning area of ​​the lathe body 1. A slide groove 22 is provided on the top of the slide 21, and a motor 23 is installed on the side wall of the slide 21. The motor 23 can adopt a DC motor, which has the characteristics of good speed regulation performance and large starting torque. By changing the armature voltage or the excitation current, the speed of the motor can be conveniently adjusted. In this case, it is necessary to consider parameters such as voltage, current, speed, and torque according to actual production conditions, so no limitation is made. A threaded rod 24 is fixedly connected to the output shaft of the motor 23, and the end of the threaded rod 24 movably penetrates into the interior of the slide groove 22 and is rotatably connected to the inner wall of the slide groove 22. The outer wall of the threaded rod 24 is threadedly sleeved with a slider, which is slidably connected to the inner wall of the slide groove 22. A chassis 25 is installed on the top of the slider, and the bottom of the outer wall of the chassis 25 is in contact with the top of the slide 21.

[0026] In this embodiment, in order to adapt to workpieces of different sizes for effective clamping, the clamping part 3 of this case is arranged on the chassis 25, and the clamping part 3 includes a three-jaw chuck 31. A circulation groove 32 is provided on the side of the three-jaw chuck 31 away from the clamping claw. The circulation groove 32 is an annular structure and the inner wall is an arc structure. A perforated disc 33 is installed at the center of the side of the three-jaw chuck 31 away from the clamping claw. A motor 2 is installed inside the chassis 25. The motor 2 adopts a servo motor, which has the advantages of fast response speed, high control accuracy, strong overload capacity, etc. In this case, it is necessary to consider parameters such as power, torque, speed, encoder resolution, etc. according to actual production conditions. , so no limitation is made. The output shaft of motor 2 movably passes through the chassis 25. The perforated disk 33 and the three-jaw chuck 31 are fixedly sleeved on the through end of the output shaft of motor 2. The center of the output shaft of motor 2 is aligned with the center of the perforated disk 33 and the center of the three-jaw chuck 31. A photoelectric sensor is installed on the through end of the output shaft of motor 2. The sensor adopts a direct-irradiation type, and the light is irradiated on the photosensitive element through the hole of the perforated disk 33. The perforated disk 33 rotates one circle with the output shaft of motor 2. The number of times the photosensitive element receives light is equal to the number of holes on the disk, so as to calculate the rotation speed. The photoelectric sensor is located inside the perforated disk 33.

[0027] In order to further overcome the wear and deviation of the rotating shaft and the wear and distortion of the thread caused by the cutting force, the compensation part 4 in this case includes two linear motors 41, which are symmetrically installed on both sides of the slide 21. L-shaped sliders 42 are installed on the mover ends of the two linear motors 41. A support plate 43 is fixedly connected between the two L-shaped sliders 42. A pressure sensor 44 is installed on the side of the support plate 43 close to the chassis 25. The sensor adopts an STM32 microprocessor to accurately measure the pressure value through contact pressure. In this case, the pressure sensor 44 is electrically connected to the photoelectric sensor, and the pressure sensor 44 is connected to the two linear motors 41. The line motor 41 is electrically connected, a compensation plate 45 is installed on the pressure sensor 44, the compensation plate 45 is fitted between the chassis 25, the compensation part 4 also includes a compensation rod 46, there are three compensation rods 46 and they are evenly distributed on the compensation plate 45, the ends of the three compensation rods 46 are fixedly connected to the compensation plate 45, and the other ends of the three compensation rods 46 are installed with balls 47, each ball 47 is fitted with the inner wall of the circulation groove 32, and the compensation rod 46 and the ball 47 are used to form a limiting ability for the three-jaw chuck 31, so as to further overcome the shaking of the rotating shaft and the shaking of the three-jaw chuck 31 caused by the influence of long-term cutting force.

[0028] It is worth noting that in order to prevent the debris generated in the turning operation area from getting stuck in the gaps of the threaded rod 24 and other equipment, the protection part 5 of this case includes two mounting plates 51, both of which are installed in the turning area of ​​the lathe body 1, and a protective cover 52 is installed on the side wall of one of the mounting plates 51, and a winding roller 53 is rotatably connected between the two mounting plates 51, and one end of the winding roller 53 is movably penetrated into the protective cover 52, and a torsion spring 54 is fixedly sleeved on the penetration end of the winding roller 53, and the torsion spring 54 is elastically connected to the protective cover 52. A steel belt 55 is wound around the winding roller 53 between the inner wall of the cover 52 and the adjacent mounting plate 51. The elastic reset ability of the torsion spring 54 can always ensure the tension of the steel belt 55. The movable end of the steel belt 55 is fixedly connected to the outer wall of the chassis 25. The bottom of the steel belt 55 fits the top of the slide 21. The steel belt 55 is made of thin steel material and can be effectively wound and released. At the same time, the steel surface has a certain hardness and smoothness to avoid collapse after unfolding and reduce the problem of metal debris adhesion.

[0029] It is worth mentioning that in order to further prevent the fallen metal debris from splashing, a baffle 6 is installed on the workbench in the turning area of ​​the lathe body 1, and scrapers are integrally connected to both sides of the baffle 6. The two scrapers are inclined and symmetrically arranged. The bottoms of the two scrapers are both in contact with the top of the steel belt 55. The winding and unfolding of the steel belt 55 passes through the scraper to automatically scrape off the metal debris. A collection trough 7 is provided on the workbench in the turning area of ​​the lathe body 1. The collection trough 7 is located below the movable end of the steel belt 55. The center line of the collection trough 7 is aligned with the center line of the baffle 6. The collection trough 7 is used to recover scraped and fallen metal debris.

[0030] Working principle: according to the actual processing requirements, a suitable workpiece is placed in the three-jaw chuck 31 for clamping, and the linear motor 41 is controlled to drive the support plate 43 to move to the side of the slide 21 close to the motor 1 23 to stand by, without obstructing the moving path of the chassis 25. The motor 1 23 is controlled to drive the threaded rod 24 to rotate and slide the slider along the inner wall of the slide groove 22, and then the chassis 25 is synchronously driven to move to a suitable processing position, and the three-jaw chuck 31 is synchronously positioned in the turning area. A multi-axis control console for adjusting the tool is provided in the lathe body 1, such as Figure 7 As shown, an accordion protective cover is arranged on the outside to protect key components from chips, coolant, dust and other impurities. This component belongs to the prior art, and its tool can be configured with a robotic arm to work in collaboration to perform turning processing on the positioned workpiece, so this case will not be described in detail.

[0031] After the workpiece is positioned, the motor 23 stops and the three-jaw chuck 31 is fixed in position. At this time, the support plate 43 is driven by the linear motor 41 to move close to the chassis 25. After the compensation plate 45 contacts the chassis 25, the three compensation rods 46 drive the ball 47 to enter the circulation groove 32, and cause the ball 47 to fit the arc surface of the inner wall of the circulation groove 32 to form a triangular limit. Under this limit state, the three-jaw chuck 31 drives the workpiece to rotate and the ball 47 will continue to roll in the circulation groove 32, thereby overcoming the wear of the three-jaw chuck 31 and the output shaft of the motor 2 caused by the cutting force through the compensation rod 46, thereby ensuring the clamping stability and rotation stability of the three-jaw chuck 31 under long-term operation, and no offset and shaking problems will occur.

[0032] When the three-jaw chuck 31 rotates, the perforated disc 33 rotates accordingly, and the rotation speed is automatically calculated by the number of times the holes on the perforated disc 33 pass through the photoelectric sensor. At high speed, the electrical signal of the photoelectric sensor causes the pressure sensor 44 to be in the starting state. At this time, the contact pressure of the pressure sensor 44 with the chassis 25 is reset to 0 through the compensation plate 45. When the tool contacts the workpiece for cutting, this force is transmitted from the tool to the workpiece and then affects the output shaft of the motor 2 through the fixture. When the three-jaw chuck 31 is affected by this force, it will generate resistance to the output shaft of the motor 2. The ball 47 is limited in the circulation groove 32 to roll at the synchronous speed, thereby further overcoming the resistance and correcting the axial force of the output shaft of the motor 2 to the correct position, avoiding damage to the output shaft of the motor 2 during long-term cutting operations, thereby causing shaking and offset problems, and also ensuring the stability of the three-jaw chuck 31.

[0033] On the other hand, when cutting a larger or harder workpiece, as the cutting force increases, the resistance experienced by the three-jaw chuck 31, the output shaft of motor 2, and the chassis 25 increases accordingly. At this time, the compensation plate 45 and the compensation rod 46 can sense the change in pressure, thereby autonomously driving the two linear motors 41 to work synchronously through electrical signals, driving the support plate 43 and pushing the compensation plate 45 to provide a force equal to and opposite to the resistance to hold the chassis 25. At the same time, the compensation rod 46 applies the same force to resist the three-jaw chuck 31, thereby compensating for the cutting force generated, preventing the output shaft of motor 2 and the threaded rod 24 from being damaged by the cutting force, thereby extending the service life.

[0034] The metal debris generated during the workpiece cutting process is picked up by the steel belt 55, and when the subsequent slider drives the chassis 25 to adjust on the slide 21, the steel belt 55 is rolled and extended in real time through the torque of the torsion spring 54, so that the metal debris picked up on the surface of the steel belt 55 is scraped into the collecting trough 7 through the scraper, thereby achieving the effect of automatically scraping away residual debris during the material return reset and material loading positioning, improving the convenience of use and reducing the pressure of manual cleaning.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A rotary positioning processing device for a CNC lathe, characterized in that: include: Lathe body (1); A positioning part (2) is installed in the lathe body (1) and is used to locate the processing position of workpieces of different sizes; A clamping portion (3) is mounted on the positioning portion (2) and is used to correct the axial force at different rotation speeds when clamping a workpiece; A compensation portion (4) is mounted on the positioning portion (2) and is used to compensate for the deviation caused by the cutting force of the workpiece; The protection part (5) is installed in the lathe body (1) and is used for isolating chips at the synchronous processing position.

2. The rotary positioning processing device for a CNC lathe according to claim 1, characterized in that: The positioning portion (2) comprises a slide (21), the slide (21) being mounted in a turning area of ​​a lathe body (1), a slide groove (22) being provided at the top of the slide (21), a motor (23) being mounted on a side wall of the slide (21), a threaded rod (24) being fixedly connected to an output shaft of the motor (23), an end of the threaded rod (24) being movably inserted into the slide groove (22) and being rotatably connected to an inner wall of the slide groove (22), a slider being threadedly sleeved on an outer wall of the threaded rod (24), the slider being slidably connected to the inner wall of the slide groove (22), a chassis (25) being mounted on the top of the slider, and the bottom of the outer wall of the chassis (25) being in contact with the top of the slide (21).

3. The rotary positioning processing device for a CNC lathe according to claim 2, characterized in that: The clamping portion (3) is arranged on the chassis (25), and the clamping portion (3) comprises a three-jaw chuck (31). A circulation groove (32) is provided on a side of the three-jaw chuck (31) away from the clamping jaws, and the circulation groove (32) is an annular structure and the inner wall is an arc-shaped structure. A perforated disc (33) is installed at the center of a side of the three-jaw chuck (31) away from the clamping jaws.

4. The rotary positioning processing device for a CNC lathe according to claim 3, characterized in that: A second motor is installed inside the chassis (25); an output shaft of the second motor movably penetrates the chassis (25); the perforated disc (33) and the three-jaw chuck (31) are both fixedly sleeved on the through-end of the output shaft of the second motor; the center of the output shaft of the second motor is aligned with the center of the perforated disc (33) and the center of the three-jaw chuck (31); a photoelectric sensor is installed on the through-end of the output shaft of the second motor; the photoelectric sensor is located inside the perforated disc (33).

5. The rotary positioning processing device for a CNC lathe according to claim 4, characterized in that: The compensation part (4) comprises two linear motors (41), the two linear motors (41) are symmetrically mounted on both sides of the slide table (21), L-shaped sliders (42) are mounted on the mover ends of the two linear motors (41), a support plate (43) is fixedly connected between the two L-shaped sliders (42), a pressure sensor (44) is mounted on a side of the support plate (43) close to the chassis (25), a compensation plate (45) is mounted on the pressure sensor (44), and the compensation plate (45) is fitted with the chassis (25).

6. The rotary positioning processing device for a CNC lathe according to claim 5, characterized in that: The compensation portion (4) further comprises a compensation rod (46), wherein the number of the compensation rods (46) is three and they are evenly distributed on the compensation plate (45), the ends of the three compensation rods (46) are fixedly connected to the compensation plate (45), and the other ends of the three compensation rods (46) are each mounted with a ball (47), and each of the ball (47) is in contact with the inner wall of the circulation groove (32).

7. The rotary positioning processing device for a CNC lathe according to claim 5, characterized in that: The protection part (5) comprises two mounting plates (51), both of which are mounted in the turning area of ​​the lathe body (1), a protective cover (52) being mounted on the side wall of one of the mounting plates (51), a winding roller (53) being rotatably connected between the two mounting plates (51), one end of the winding roller (53) being movably inserted into the protective cover (52), a torsion spring (54) being fixedly sleeved on the inserted end of the winding roller (53), the torsion spring (54) being elastically connected between the inner wall of the protective cover (52) and the adjacent mounting plate (51), and a steel belt (55) being wound around the winding roller (53).

8. The rotary positioning processing device for a CNC lathe according to claim 7, characterized in that: The movable end of the steel belt (55) is fixedly connected to the outer wall of the chassis (25), and the bottom of the steel belt (55) is in contact with the top of the slide table (21).

9. The rotary positioning processing device for a CNC lathe according to claim 8, characterized in that: The workbench in the turning area of ​​the lathe body (1) is installed with a baffle (6), and scrapers are integrally connected to both sides of the baffle (6), and the two scrapers are arranged obliquely and symmetrically with each other, and the bottoms of the two scrapers are in contact with the top of the steel belt (55).

10. The rotary positioning processing device for a CNC lathe according to claim 9, characterized in that: A material collecting trough (7) is provided on the workbench in the turning area of ​​the lathe body (1). The material collecting trough (7) is located below the movable end of the steel belt (55). The center line of the material collecting trough (7) is aligned with the center line of the baffle (6).

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