Numerically controlled high-efficiency grinding machine for cylindrical pieces

Abstract

The application relates to the technical field of machine tools, and particularly discloses a numerical control efficient grinding machine tool for columnar pieces, which comprises a machine tool base and a motor five installed on the machine tool base, the shaft end bearing of the motor five penetrates through one side of the machine tool base and is connected with a three-jaw self-centering chuck, the upper surface of the machine tool base is slidably connected with a supporting plate through a sliding guide assembly one, a tailstock corresponding to the three-jaw self-centering chuck is installed on the supporting plate, the three-jaw self-centering chuck and the tailstock are used for stably clamping the columnar piece, the inner bottom surface of the machine tool base is connected with a moving box through a sliding guide assembly two, the moving box is connected with a mounting rack through a horizontal distance adjusting mechanism, a screw rod one penetrates through the moving box in a threaded mode, and the front end bearing of the screw rod one is connected to the inner side of the machine tool base. When the columnar piece with a relatively long length is ground, the two sides of the grinding position can be supported, so that the columnar piece is prevented from being bent due to the extrusion of the grinding wheel, and the grinding precision can be controlled.

Description

Technical Field

[0001] This invention relates to the field of grinding machine tool technology, specifically to a CNC high-efficiency grinding machine tool for cylindrical parts. Background Technology

[0002] Cylindrical parts, as the basic core components of mechanical structures such as shafts, tubes, and sleeves, are widely used in fields such as engineering machinery, automobile manufacturing, precision transmission, rail transportation, and high-end equipment manufacturing. Their outer diameter accuracy, surface roughness, cylindricity, and dimensional consistency directly affect the assembly accuracy, operational stability, and service life of the whole machine. Grinding, as a key process in the precision machining of cylindrical parts, can achieve high-precision dimensional control and excellent surface quality, and is an important processing link to ensure the performance of parts. CNC grinding machine tools can achieve precise control of parameters such as grinding wheel feed, workpiece speed, feed rate, and grinding allowance through preset programs. With a stable and reliable workpiece clamping and feeding mechanism, they can complete intelligent grinding of the outer circle of cylindrical parts. With an intelligent feeding mechanism, they can realize intelligent processing of cylindrical parts. In actual production, according to the structural characteristics of cylindrical parts, a suitable positioning and clamping mechanism is adopted to realize rapid workpiece clamping and stable centering. With the linkage control of the CNC system, the continuity and controllability of the processing process can be effectively improved, meeting the needs of large-scale and fine processing of cylindrical parts of different specifications and precision levels, and providing stable and reliable process support for the manufacturing of various high-end equipment parts. Existing high-efficiency CNC grinding machine tools, such as the grinding device for machining CNC machine tool drive shafts disclosed in publication number CN219901419U, use a moving table to allow the mounting column to slide and support itself on the machine tool body. The moving table is powered by a drive mechanism, the grinding wheel and the working motor are stably supported by the mounting column, the grinding wheel is powered by the working motor, the grinding wheel is powered by the rotation of the grinding wheel, the drive shaft is ground by the rotation of the grinding wheel, the threaded column is connected to the adjustment mechanism by the worm gear, the working height of the grinding wheel is adjusted by the rotation of the threaded column and the threaded hole of the mounting column, and the grinding position of the drive shaft is adjusted by the moving table driving the position of the grinding wheel, thereby improving the grinding efficiency of the drive shaft and improving the ease of use; The aforementioned prior art cannot grind columnar parts with a length exceeding a certain range. The main reason is that columnar parts with a length exceeding a certain range are prone to bending. When grinding them locally, the local area is prone to bending due to force, especially in the middle of columnar parts of this length. Because this type of long cylindrical component is prone to bending, it can significantly affect the precision during grinding, making it difficult to control the grinding precision. Therefore, a high-efficiency CNC grinding machine tool for cylindrical parts is needed to solve the above problems. Summary of the Invention

[0003] The purpose of this invention is to provide a CNC high-efficiency grinding machine tool for cylindrical parts, so as to solve the problem mentioned in the background art that existing CNC high-efficiency grinding machine tools are not conducive to controlling the grinding accuracy when grinding long cylindrical parts.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A CNC high-efficiency grinding machine tool for cylindrical parts includes a machine base and a motor 5 mounted thereon. A bearing at the shaft end of the motor 5 passes through one side of the machine base and connects to a three-jaw self-centering chuck. A support plate is slidably connected to the upper surface of the machine base via a sliding guide assembly 1. A center corresponding to the three-jaw self-centering chuck is mounted on the support plate. The three-jaw self-centering chuck and the center are used to stably clamp the cylindrical part. A movable box is connected to the inner bottom surface of the machine base via a sliding guide assembly 2. The movable box is connected to a mounting frame via a horizontal adjustment mechanism. A lead screw 1 is threaded through the movable box, and the front end bearing of the lead screw 1 is connected to the inner side of the machine base. The machine base is internally configured with… There is a second lead screw parallel to the first lead screw, and the front end of the second lead screw is also bearing-connected to the inner side of the machine tool base. The rear ends of both the first and second lead screws are bearing-through to the outside of the machine tool base, and the rear ends of the first and second lead screws are coaxially fixedly connected to the output ends of the first and second motors, respectively. The first and second motors are both mounted on the outside of the machine tool base through motor covers. There are two mounting brackets, and each mounting bracket is equipped with a third motor and a corresponding grinding wheel. The third motor and the corresponding grinding wheel are connected by a belt drive structure. Each mounting bracket is also equipped with an anti-bending support mechanism, and the anti-bending support mechanism includes a rotating clamping assembly for supporting the columnar component.

[0005] Preferably, both the first sliding guide component and the second sliding guide component are composed of a slide groove and a slider. The first sliding guide component and the second sliding guide component are used to make the support plate and the moving box move stably along the corresponding slide grooves respectively.

[0006] Preferably, the horizontal adjustment mechanism includes a motor four installed inside the movable box, and the movable box also has a bearing connected to a shaft column. The lower end of the shaft column is connected to the motor four through a worm gear structure, and the upper end of the shaft column is threadedly connected to a guide frame coaxial with it.

[0007] Preferably, the horizontal adjustment mechanism further includes guide arms provided on both sides of the outside of the movable box, and the guide arms are C-shaped. The upper part of the guide arm extends into the interior of the movable box, and the upper part of the guide arm is connected to the corresponding mounting bracket through a sliding guide assembly.

[0008] Preferably, the sliding guide assembly consists of a horizontal sliding block, a strip groove, and a block protrusion. The strip groove is provided on both sides of the upper part of the guide arm. The horizontal sliding block is vertically fixed to the lower end of the corresponding mounting bracket. The block protrusion is provided on both sides of the horizontal sliding block. The horizontal sliding block is slidably connected to the upper part of the guide arm. The block protrusion slides through the corresponding strip groove.

[0009] Preferably, the horizontal adjustment mechanism further includes a guide block connected to each horizontal sliding block, and the guide block is collinear with the axis of the corresponding horizontal sliding block. The guide block is provided with an oblique through groove passing through both sides, and a corresponding guide post slides through the oblique through groove. The guide frame is a U-shaped structure, and U-shaped grooves are provided at both ends. The guide post is provided in the U-shaped grooves at both ends of the guide frame.

[0010] Preferably, the anti-bending support mechanism further includes mounting arms shaft-connected to each mounting bracket, and four mounting arms are provided on each mounting bracket. The rotating clamping assembly bearing is mounted on one opposite end of the mounting arms on two mounting brackets, and a piston box is provided between the other ends of two mounting arms in the same vertical position. Piston rods are movably inserted into both ends of the piston box, and the ends of the piston rods extending into the piston box are seamlessly slidably connected to the inner side of the piston box. The ends of the piston rods extending out of the piston box are connected to the corresponding mounting arm through a rotating guide assembly, and the ends of two opposite piston rods inside the piston box are connected by a support spring. Two piston boxes on the same side of the mounting bracket are connected by a push rod, and a limit post is fixedly connected to the side of the piston box facing the corresponding mounting bracket. A corresponding limit tube is movably sleeved on the outside of the limit post, and the limit tube is fixedly installed on the side of the corresponding mounting bracket. A compression spring connected between the limit tube and the piston box is sleeved on the outside of the limit post.

[0011] Preferably, the end of the mounting arm that mounts the piston rod is provided with a U-shaped recess, and the rotation guide assembly includes a strip-shaped through groove penetrating both sides of the U-shaped recess and a columnar protrusion that slides through the strip-shaped through groove, and the columnar protrusion is provided on both sides of the piston rod end.

[0012] Preferably, the anti-bending support mechanism further includes centrifugal channels distributed at equal angles inside the rotating clamping assembly, and the centrifugal channels have an arc-shaped structure. A liquid collection hood coaxial with the rotating clamping assembly is fixedly installed on the outside of the mounting arm, and a liquid flow channel communicating with the liquid collection hood is provided on the rotating clamping assembly. A liquid guiding channel is provided inside the rotating clamping assembly, and the liquid guiding channel corresponds one-to-one with the centrifugal channel. The centrifugal channel and the liquid flow channel are connected through the liquid guiding channel.

[0013] Preferably, the piston rod is provided with a through hole, which extends from the outer end of the piston rod into the interior of the piston box. The opening of the through hole at the outer end of the piston rod is connected to the corresponding liquid collection hood through a liquid guide pipe, and the liquid guide pipe extends through the corresponding mounting arm. The space formed by the piston box, the through hole on the piston rod, the liquid guide pipe, the liquid collection hood, the liquid flow channel, the liquid guide channel, and the centrifugal channel is filled with hydraulic oil with a volume smaller than its capacity.

[0014] Compared with the prior art, the beneficial effects of the present invention are: when grinding long columnar parts, the CNC high-efficiency grinding machine tool can support both sides of the grinding area, thus avoiding bending of the columnar part due to the pressure of the grinding wheel, and helping to control the grinding accuracy. 1. By compressing the piston box with the compression spring, the piston box moves towards the end of the mounting arm where the rotating guide assembly is located. This causes the ends of the mounting arms located above and below the piston box to move away from each other, thereby causing the two ends of the rotating clamping assembly to move closer together. This allows the rotating clamping assembly to clamp the outer side of the columnar part, so that when the grinding wheels between the rotating clamping assemblies grind the columnar part, the columnar part will not bend due to the compression of the grinding wheels, which helps to control the grinding accuracy of the columnar part. 2. When the cylindrical component rotates at high speed, it drives the rotating clamping assembly that holds it to rotate at high speed. When the rotating clamping assembly rotates at high speed, the hydraulic oil in the centrifugal channel will be transported into the liquid channel under the action of centrifugal force. Therefore, it is transported to the piston box through the liquid flow channel, liquid collection hood, liquid guide pipe and through hole on piston rod, so as to increase the pressure in the piston box. This causes the piston rods at both ends of the piston box to tend to move away from each other, which helps to improve the clamping stability of the rotating clamping assembly on the cylindrical component. This means that the faster the rotation speed of the cylindrical component, the greater the clamping force of the rotating clamping assembly on it. Therefore, it can avoid the reduction of the clamping stability of the rotating clamping assembly when the rotation speed of the cylindrical component is too fast. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a side view of the structure of the present invention; Figure 3 This is a schematic diagram of the connection structure between the movable box and the lead screw of the present invention; Figure 4 This is a schematic diagram of the connection structure between the mobile box and the mounting frame of the present invention; Figure 5 This is a schematic cross-sectional view of the connection between the mounting arm and the rotating clamping assembly of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram of point A in the middle; Figure 7This is a partial cross-sectional view of the connection between the mounting arm and the rotating clamping assembly of the present invention. Figure 8 For the present invention Figure 7 Enlarged structural diagram of point B; Figure 9 This is a schematic diagram of the connection structure between the movable box and the grinding wheel of the present invention; Figure 10 This is a partial cross-sectional view of the mounting bracket of the present invention; Figure 11 This is a partial cross-sectional view of the mobile box of the present invention; Figure 12 This is a bottom view schematic diagram of the connection between the shaft column and the guide frame of the present invention; Figure 13 For the present invention Figure 12 A magnified structural diagram of point C.

[0016] In the diagram: 1. Machine base; 2. Motor cover; 3. Sliding guide assembly one; 4. Support plate; 5. Three-jaw self-centering chuck; 6. Moving box; 7. Lead screw one; 8. Lead screw two; 9. Center; 10. Sliding guide assembly two; 11. Motor one; 12. Motor two; 13. Mounting bracket; 14. Guide arm; 15. Mounting arm; 16. Rotary clamping assembly; 17. Grinding wheel; 18. Rotary guide assembly; 19. Centrifugal channel; 20. Liquid guiding channel; 21. 1. Liquid guide tube; 22. Piston rod; 23. Piston box; 24. Support spring; 25. Limiting post; 26. Limiting tube; 27. Compression spring; 28. Push rod; 29. ​​Liquid flow channel; 30. Liquid collection hood; 31. Belt drive structure; 32. Motor three; 33. Sliding guide assembly three; 34. Motor four; 35. Worm gear structure; 36. Shaft column; 37. Guide frame; 38. Guide block; 39. Inclined through groove; 40. Guide post; 41. Motor five. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1-13 The present invention provides the following technical solution: Example 1: To address the problem that grinding precision cannot be controlled when grinding long cylindrical parts on conventional grinding machines due to bending caused by compression, the following technical solution is provided: A high-efficiency CNC grinding machine for cylindrical parts includes a machine base 1 and a motor 41 mounted thereon. The shaft end bearing of the motor 41 passes through one side of the machine base 1 and is connected to a three-jaw self-centering chuck 5. A support plate 4 is slidably connected to the upper surface of the machine base 1 via a sliding guide assembly 3. A center 9 corresponding to the three-jaw self-centering chuck 5 is mounted on the support plate 4. The chuck 5 and center 9 are used to stably clamp the cylindrical part. The inner bottom surface of the machine tool base 1 is connected to the movable box 6 through the sliding guide assembly 10. The movable box 6 is connected to the mounting bracket 13 through the horizontal adjustment mechanism. A lead screw 7 is threaded through the movable box 6, and the front end of the lead screw 7 is bearing connected to the inner side of the machine tool base 1. A second lead screw 8 is provided inside the machine tool base 1, parallel to the lead screw 7. The front end of the second lead screw 8 is also bearing connected to the inner side of the machine tool base 1. The rear ends of both the lead screw 7 and the second lead screw 8 are bearing through to the outside of the machine tool base 1, and the rear ends of the lead screw 7 and the second lead screw 8 are coaxially fixed. Connected to the output ends of motor 11 and motor 212, both motor 11 and motor 212 are mounted on the outside of the machine tool base 1 via motor cover 2. Two mounting brackets 13 are provided, and each mounting bracket 13 is equipped with motor 32 and a corresponding grinding wheel 17. Motor 32 and the corresponding grinding wheel 17 are connected via a belt drive structure 31. Each mounting bracket 13 is also equipped with an anti-bending support mechanism, which includes a rotating clamping assembly 16 for supporting the columnar component. The rotating clamping assembly 16 consists of a drive motor, a driven wheel, and a wheel sleeve. The motor is mounted on the mounting arm 15, and the shaft end bearing of the driven wheel is connected to the inner side of the mounting arm 15. One of the two shaft end bearings of the driven wheel passes through the mounting arm 15 and is coaxially connected to the output end of the drive motor, so that the drive motor can drive the driven wheel to rotate when it is running. The wheel sleeve bearing is sleeved on the outer side of the driven wheel. The wheel sleeve is used to contact the columnar member, thereby supporting the columnar member. The sliding guide assembly 1 3 and the sliding guide assembly 2 10 are both composed of a sliding groove and a slider. The sliding guide assembly 1 3 and the sliding guide assembly 2 10 are used to make the support plate 4 and the moving box 6 move stably along the corresponding sliding grooves respectively.

[0019] The horizontal adjustment mechanism includes a motor 34 installed inside the movable housing 6. A shaft 36 is also connected to the movable housing 6 via a bearing. The lower end of the shaft 36 is connected to the motor 34 via a worm gear structure 35, and the upper end of the shaft 36 is threadedly connected to a guide frame 37 coaxial with it. The horizontal adjustment mechanism also includes guide arms 14 located on both sides of the exterior of the movable housing 6. The guide arms 14 have a C-shaped structure, with the upper part of the guide arm 14 extending into the interior of the movable housing 6. The upper part of the guide arm 14 is connected to a corresponding mounting bracket 13 via a sliding guide assembly 33. The sliding guide assembly 33 consists of a horizontal sliding block, a strip-shaped groove, and a block-shaped protrusion. The strip-shaped groove guides... Both sides of the upper part of the arm 14 are provided with horizontal sliding blocks that are vertically fixed to the lower end of the corresponding mounting bracket 13. Block-shaped protrusions are provided on both sides of the horizontal sliding blocks. The horizontal sliding blocks are slidably connected to the upper part of the guide arm 14. The block-shaped protrusions slide through the corresponding strip-shaped through slots. The horizontal adjustment mechanism also includes guide blocks 38 connected to each horizontal sliding block. The guide blocks 38 are collinear with the axis of the corresponding horizontal sliding blocks. The guide blocks 38 are provided with oblique through slots 39 that pass through both sides. The oblique through slots 39 slide through the corresponding guide posts 40. The guide frame 37 has a U-shaped structure and U-shaped slots are provided at both ends. The guide posts 40 are provided in the U-shaped slots at both ends of the guide frame 37.

[0020] The position of the support plate 4 is adjusted by motor 2 12, the rotation speed of the columnar part is controlled by motor 5 41, the position of the moving box 6 is adjusted by motor 1 11, and the grinding wheel 17 is driven to rotate by motor 3 32. By intelligently controlling motor 2 12, motor 5 41, motor 1 11 and motor 3 32, columnar parts of different lengths and materials can be ground stably. With the intelligent feeding mechanism, intelligent processing of columnar parts can be achieved, which helps to reduce labor intensity and improve work efficiency and effect. In addition, by controlling the rotation speed of the driven wheel through the drive motor, it is possible to stably clamp cylindrical parts of different diameters, which helps to improve the stability of intelligent grinding of cylindrical parts. according to Figures 11-13 When in use, start motor 34, which drives shaft 36 to rotate through worm gear structure 35; When the shaft column 36 rotates, it can drive the guide frame 37, which is threaded to the upper end, to move along the axial direction of the shaft column 36; When the guide frame 37 moves, the guide column 40 connected to it moves synchronously. During the movement of the guide post 40, the two guide blocks 38 can be moved away from or closer to each other by the guide through the inclined through groove 39; By moving the two guide blocks 38 away from or towards each other, the two mounting brackets 13 can be driven to move away from or towards each other synchronously. In other words, the distance between the two grinding wheels 17 can be controlled, which makes it easier to grind columnar parts of different diameters and also controls the grinding accuracy. Furthermore, since the two mounting brackets 13 are oriented in opposite directions, they can counteract radial forces, thus preventing workpiece bending and deformation, and reducing vibration and tool deflection.

[0021] The anti-bending support mechanism also includes mounting arms 15 shaft-connected to each mounting bracket 13, and four mounting arms 15 are provided on each mounting bracket 13. A rotating clamping assembly 16 is bearing-mounted at one opposite end of each mounting arm 15 on two mounting brackets 13. A piston box 23 is provided between the other ends of two mounting arms 15 in the same vertical position. Piston rods 22 extend movably from both ends of the piston box 23, and the ends of the piston rods 22 extending into the piston box 23 are seamlessly slidably connected to the inner side of the piston box 23. The ends of the piston rods 22 extending out of the piston box 23 are connected to the corresponding mounting arms 15 via a rotating guide assembly 18. The ends of two opposite piston rods 22 inside the piston box 23 are connected by a support... The two piston boxes 23 on the same side of the mounting bracket 13 are connected by a push rod 28 and the piston box 23 is fixedly connected to the side of the mounting bracket 13 facing the corresponding side of the mounting bracket 13. The outer side of the limiting post 25 is movably sleeved with a corresponding limiting tube 26 and the limiting tube 26 is fixedly installed on the side of the corresponding mounting bracket 13. The outer side of the limiting post 25 is sleeved with a compression spring 27 connecting the limiting tube 26 and the piston box 23. The end of the mounting arm 15 where the piston rod 22 is mounted is provided with a U-shaped recess. The rotating guide assembly 18 includes a strip-shaped through groove that passes through both sides of the U-shaped recess and a columnar protrusion that slides through the strip-shaped through groove. The columnar protrusion is provided on both sides of the end of the piston rod 22.

[0022] according to Figures 1-4 as well as Figure 6 When in use, the compression spring 27 compresses the piston box 23, thus driving the piston box 23 away from the limit tube 26; When the piston box 23 moves, it will bring the two opposing rotating clamping assemblies 16 closer to each other, thus facilitating the clamping of the cylindrical member; After the columnar part is polished, the two mounting brackets 13 can be moved away from each other by the drive motor 34 to remove the polished columnar part. The piston box 23 can be moved closer to the limit tube 26 by pushing the push rod 28 so that the two opposing rotating clamping assemblies 16 can be moved away from each other, thus moving the rotating clamping assembly 16 away from the columnar part. At this time, the polished columnar part can also be removed. After the rotating clamping assembly 16 clamps the columnar part, it can support the grinding part of the columnar part, thereby preventing the grinding part from bending easily due to the excessive length of the columnar part, thus making it easier to control the grinding accuracy.

[0023] Example 2: To solve the problem in Example 1 where the rotating clamping assembly 16 cannot stably clamp a long cylindrical part due to the excessive rotation speed of the cylindrical part during grinding, the following technical solution is provided: Specifically, the anti-bending support mechanism further includes centrifugal channels 19 evenly distributed inside the rotating clamping assembly 16, and the centrifugal channels 19 have an arc-shaped structure. A liquid collection cover 30 coaxial with the rotating clamping assembly 16 is fixedly installed on the outside of the mounting arm 15, and a liquid flow channel 29 communicating with the liquid collection cover 30 is provided on the rotating clamping assembly 16. The rotating clamping assembly 16 has liquid guiding channels 20 evenly distributed inside, and the liquid guiding channels 20 correspond one-to-one with the centrifugal channels 19. The centrifugal channels 19 and the liquid flow channels 29 are connected through the liquid guiding channels 20.

[0024] The piston rod 22 is provided with a through hole, which extends from the outer end of the piston rod 22 into the interior of the piston box 23. The opening of the through hole at the outer end of the piston rod 22 is connected to the corresponding liquid collection cover 30 through the liquid guide pipe 21, and the liquid guide pipe 21 is provided through the corresponding mounting arm 15. The space formed by the piston box 23, the through hole on the piston rod 22, the liquid guide pipe 21, the liquid collection cover 30, the liquid flow channel 29, the liquid guide channel 20 and the centrifugal channel 19 is filled with hydraulic oil with a volume smaller than its capacity.

[0025] according to Figures 5-8 When in use, the starting of motor 541 will cause the columnar part clamped between the three-jaw self-centering chuck 5 and the tip 9 to rotate at high speed. When the columnar component rotates at high speed, the rotating clamping assembly 16 supporting it will rotate due to friction. When the rotating clamping assembly 16 rotates, the hydraulic oil in its internal centrifugal channel 19 will tend to be transported into the liquid flow channel 29 through the liquid guide channel 20 due to the centrifugal force. Subsequently, through the through holes on the liquid collection hood 30, the liquid guide pipe 21, and the piston rod 22, the hydraulic oil has the tendency to flow into the piston box 23. The increasing volume of hydraulic oil in the piston box 23 will cause the piston rods 22 at both ends of the piston box 23 to move away from each other. During this process, the squeezing force of the rotating clamping assembly 16 on the columnar member can be increased, thereby ensuring that the rotating clamping assembly 16 provides stable support for the columnar member and avoiding the problem that the rotating clamping assembly 16 cannot stably clamp the columnar member due to the excessive rotation speed of the columnar member.

[0026] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A CNC high-efficiency grinding machine tool for columnar parts, comprising a machine tool base (1) and a motor five (41) mounted thereon, wherein the shaft end bearing of the motor five (41) passes through one side of the machine tool base (1) and is connected to a three-jaw self-centering chuck (5), characterized in that: The upper surface of the machine tool base (1) is slidably connected to a support plate (4) via a sliding guide assembly (3), and a center (9) corresponding to a three-jaw self-centering chuck (5) is installed on the support plate (4). The three-jaw self-centering chuck (5) and the center (9) are used to stably clamp the columnar part. The inner bottom surface of the machine tool base (1) is connected to a moving box (6) via a sliding guide assembly (10), and the moving box (6) is connected to the mounting frame (13) via a horizontal adjustment mechanism. A lead screw (7) is threaded through the moving box (6), and the front end of the lead screw (7) is bearing-connected to the inner side of the machine tool base (1). A lead screw (8) parallel to the lead screw (7) is provided inside the machine tool base (1), and the front end of the lead screw (8) is also bearing-connected to the inner side of the machine tool base (1). The rear ends of lead screw 1 (7) and lead screw 2 (8) are both bearings that extend to the outside of the machine tool base (1), and the rear ends of lead screw 1 (7) and lead screw 2 (8) are coaxially fixedly connected to the output ends of motor 1 (11) and motor 2 (12), respectively. Motor 1 (11) and motor 2 (12) are both installed on the outside of the machine tool base (1) through motor cover (2). There are two mounting brackets (13), and each mounting bracket (13) is equipped with motor 3 (32) and a corresponding grinding wheel (17). Motor 3 (32) and the corresponding grinding wheel (17) are connected through a belt drive structure (31). Each mounting bracket (13) is also equipped with an anti-bending support mechanism, and the anti-bending support mechanism includes a rotating clamping assembly (16) for supporting the columnar part.

2. The CNC high-efficiency grinding machine tool for columnar parts according to claim 1, characterized in that: Both the sliding guide component one (3) and the sliding guide component two (10) are composed of a sliding groove and a slider. The sliding guide component one (3) and the sliding guide component two (10) are used to make the support plate (4) and the moving box (6) move stably along the corresponding sliding grooves respectively.

3. A CNC high-efficiency grinding machine tool for columnar parts according to claim 2, characterized in that: The horizontal adjustment mechanism includes a motor four (34) installed inside the movable box (6), and a shaft column (36) is also connected to the movable box (6) by bearings. The lower end of the shaft column (36) is connected to the motor four (34) through a worm gear structure (35), and the upper end of the shaft column (36) is threadedly connected to a guide frame (37) coaxial with it.

4. A CNC high-efficiency grinding machine tool for columnar parts according to claim 3, characterized in that: The horizontal adjustment mechanism also includes guide arms (14) provided on both sides of the outside of the movable box (6), and the guide arms (14) are C-shaped. The upper part of the guide arm (14) extends into the interior of the movable box (6), and the upper part of the guide arm (14) is connected to the corresponding mounting bracket (13) through the sliding guide assembly three (33).

5. A CNC high-efficiency grinding machine tool for columnar parts according to claim 4, characterized in that: The sliding guide assembly three (33) consists of a horizontal sliding block, a strip groove and a block protrusion. The strip groove is provided on both sides of the upper part of the guide arm (14). The horizontal sliding block is vertically fixed to the lower end of the corresponding mounting bracket (13). The block protrusion is provided on both sides of the horizontal sliding block. The horizontal sliding block is slidably connected to the upper part of the guide arm (14). The block protrusion slides through the corresponding strip groove.

6. A CNC high-efficiency grinding machine tool for columnar parts according to claim 5, characterized in that: The horizontal adjustment mechanism also includes a guide block (38) connected to each horizontal sliding block, and the guide block (38) is collinear with the axis of the corresponding horizontal sliding block. The guide block (38) is provided with a through groove (39) that runs through both sides of it, and a corresponding guide post (40) slides through the through groove (39). The guide frame (37) is a U-shaped structure, and U-shaped grooves are provided at both ends of it. The guide post (40) is provided in the U-shaped grooves at both ends of the guide frame (37).

7. A CNC high-efficiency grinding machine tool for columnar parts according to claim 6, characterized in that: The anti-bending support mechanism also includes mounting arms (15) shaft-connected to each mounting bracket (13), and four mounting arms (15) are provided on each mounting bracket (13). The rotating clamping assembly (16) is bearing-mounted at one end of the mounting arms (15) on two mounting brackets (13) respectively, and a piston box (23) is provided between the other ends of the two mounting arms (15) in the same vertical position. Piston rods (22) are movably inserted into both ends of the piston box (23), and the end of the piston rod (22) extending into the piston box (23) is seamlessly slidably connected to the inner side of the piston box (23). The end of the piston rod (22) extending out of the piston box (23) is connected to the rotating guide assembly. The component (18) is connected to the corresponding mounting arm (15), and the ends of the two opposing piston rods (22) in the piston box (23) are connected by a support spring (24). The two piston boxes (23) on the same side of the mounting bracket (13) are connected by a push rod (28), and the piston box (23) is fixedly connected to a limiting post (25) on the side facing the corresponding mounting bracket (13). The limiting post (25) is movably sleeved with a corresponding limiting tube (26), and the limiting tube (26) is fixedly installed on the side of the corresponding mounting bracket (13). The limiting post (25) is sleeved with a compression spring (27) connected between the limiting tube (26) and the piston box (23).

8. A CNC high-efficiency grinding machine tool for columnar parts according to claim 7, characterized in that: The mounting arm (15) has a U-shaped recess at the end of the piston rod (22). The rotating guide assembly (18) includes a strip-shaped through groove that passes through both sides of the U-shaped recess and a columnar protrusion that slides through the strip-shaped through groove. The columnar protrusion is provided on both sides of the end of the piston rod (22).

9. A CNC high-efficiency grinding machine tool for columnar parts according to claim 8, characterized in that: The anti-bending support mechanism also includes centrifugal channels (19) distributed at equal angles inside the rotating clamping assembly (16), and the centrifugal channels (19) are arc-shaped. The mounting arm (15) is fixedly installed with a liquid collection hood (30) coaxial with the rotating clamping assembly (16) on the outside. The rotating clamping assembly (16) is provided with a liquid flow channel (29) that communicates with the liquid collection hood (30). The rotating clamping assembly (16) is provided with liquid guiding channels (20) distributed at equal angles inside, and the liquid guiding channels (20) correspond one-to-one with the centrifugal channels (19). The centrifugal channels (19) and the liquid flow channels (29) are connected through the liquid guiding channels (20).

10. A CNC high-efficiency grinding machine tool for columnar parts according to claim 9, characterized in that: The piston rod (22) is provided with a through hole, and the through hole extends from the outer end of the piston rod (22) to the interior of the piston box (23). The opening of the through hole at the outer end of the piston rod (22) is connected to the corresponding liquid collection cover (30) through the liquid guide pipe (21), and the liquid guide pipe (21) is provided through the corresponding mounting arm (15). The space formed by the piston box (23), the through hole on the piston rod (22), the liquid guide pipe (21), the liquid collection cover (30), the liquid flow channel (29), the liquid guide channel (20) and the centrifugal channel (19) is filled with hydraulic oil with a volume smaller than its internal volume.

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