Round pipe polishing machine for automobile part production

Abstract

The invention relates to the technical field of round pipe polishing machines, in particular to a round pipe polishing machine for automobile part production, which comprises a bottom plate, and a polishing assembly is arranged in the middle of the upper end of the bottom plate and is used for grinding and polishing the surface of a conical exhaust round pipe. One side of the upper end face of the bottom plate is fixedly connected with a discharging frame used for containing unpolished conical exhaust circular pipes, the side, away from the discharging frame, of the upper end face of the bottom plate is fixedly connected with a discharging frame used for assisting in discharging of the polished conical exhaust circular pipes, and the upper end face of the bottom plate is provided with a circular pipe supporting assembly. The two round pipe supporting assemblies are arranged on the two sides of the middle of the upper end face of the bottom plate correspondingly and used for supporting a round pipe to be polished. Compared with the prior art, the problem that in the prior art, it is difficult for a round pipe polishing machine to meet the actual requirement for the polishing quality of the conical exhaust round pipe is solved.

Description

Technical Field

[0001] The invention relates to the technical field of round tube polishing machines, in particular to a round tube polishing machine for producing automobile parts. Background Art

[0002] In the production process of automobile parts, round tube polishing machine is an important equipment widely used in the surface polishing of various metal round tubes. This equipment not only improves production efficiency, but also ensures the stability and consistency of product quality. In the production of automobile parts, round tube polishing machine is widely used in the polishing of various metal round tubes, such as exhaust pipes, oil pipes, brake pipes, etc. After polishing, these parts have high surface brightness and stable quality, which meets the high standards of automobile manufacturing.

[0003] In the prior art, a Chinese patent document with publication number CN111515844B proposes a round tube surface rapid polishing machine, comprising a base, a support platform fixedly installed on the base by bolts, and a pair of first guide rails fixedly installed on the support platform by bolts, a first moving seat slidably installed on the first guide rail, and a lifting adjustment push rod fixedly installed on the first moving seat by bolts, a first screw drive motor fixedly installed on the first guide rail by bolts, and the output end of the first screw drive motor drives the first moving seat to slide along the first guide rail through the screw, although it is suitable for large-scale round tube production, the device can process round tubes of various diameters and lengths, and has better general processing performance; However, for the sake of use, some car companies will use tapered exhaust pipes. The above-mentioned pipe polishing machine faces a significant challenge in actual application: it is difficult to polish the tapered exhaust pipe efficiently and accurately. This limitation is mainly due to its inherent design characteristics - the pipe support structure is mostly customized for pipes with uniform diameters. When the tapered pipe is placed on this polishing machine, it often cannot obtain stable support due to its gradually tapering shape, causing the tapered pipe to tilt during the polishing process. This tilt not only affects the polishing operation, but also seriously weakens the consistency of the surface quality of the tapered exhaust pipe before and after polishing, which has a significant impact on the manufacturing accuracy and aesthetics of automotive parts.

[0004] Furthermore, we disclose a round tube polishing machine for automobile parts production to meet the actual demand for the polishing quality of conical exhaust round tubes that is difficult to ensure in the prior art round tube polishing machines. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a round tube polishing machine for automobile parts production to solve the problem that the round tube polishing machine in the prior art is difficult to ensure the polishing quality of the conical exhaust round tube.

[0006] Based on the above-mentioned purpose, the present invention provides a round tube polishing machine for automobile parts production, including a base plate, a polishing assembly is arranged in the middle of the upper end of the base plate, the polishing assembly is used to grind and polish the surface of the conical exhaust round tube, one side of the upper end surface of the base plate is fixedly connected with a discharge rack for placing unpolished conical exhaust round tubes, the side of the upper end surface of the base plate away from the discharge rack is fixedly connected with a discharge rack for assisting in the discharge of the conical exhaust round tube after polishing, the upper end surface of the base plate is arranged with a round tube support assembly, two round tube support assemblies are arranged respectively on both sides of the middle of the upper end surface of the base plate, and the round tube support assembly is used to support the round tube for polishing.

[0007] Preferably, the polishing assembly includes a lifting plate, the four corners of the lifting plate are slidably connected to guide columns, the four corners of the lower end surface of the lifting plate are fixedly connected to return springs, the return springs are sleeved on the outside of the guide columns, and the lower end surface of the return springs is fixedly connected to the bottom plate.

[0008] Preferably, baffles are fixedly connected to the upper end surfaces of the four guide posts.

[0009] Preferably, a servo motor is provided on one side of the middle part of the upper end surface of the lifting plate, the output end of the servo motor is fixedly connected to a driving gear, the front and rear ends of the outer wall of the driving gear are both transmission-connected with toothed belts, and the upper ends of the two toothed belts are both transmission-connected with driven gears.

[0010] Preferably, one side end surface of the two driven gears is fixedly connected to a transmission shaft, the middle part of the outer wall of the two transmission shafts is rotatably connected to a support plate, and the ends of the two transmission shafts away from the driven gears are respectively fixedly connected to a guide wheel and a polishing wheel.

[0011] Preferably, a plurality of second support frames are evenly spaced and fixedly connected to the lower end surface of the discharge rack, the lower ends of the plurality of second support frames are fixedly connected to the bottom plate, and one side of the upper end of the second support frame is inclined and fixedly connected to a limiting plate.

[0012] Preferably, a bracket is fixedly connected to the side of the lower end face of the unloading rack away from the discharge rack, a multi-stage cylinder is provided on one end face of the bracket, a push rod is fixedly connected to the output end of the multi-stage cylinder, the push rod is conical, and a plurality of connecting plates are evenly fixedly connected to the outer side of the end face of the push rod close to the multi-stage cylinder.

[0013] Preferably, a plurality of first support frames are fixedly connected to one side of the lower end surface of the discharge rack, the lower end surfaces of the plurality of first support frames are fixedly connected to the bottom plate, a material guide plate is fixedly connected to the middle part of one end surface of the first support frame, the material guide plate is inclined, and the middle part of the discharge rack is inclined toward the side of the material guide plate.

[0014] Preferably, the circular tube support assembly includes a fixed ring fixedly connected to the base plate, a plurality of rotating seats are evenly spaced and fixedly connected inside the fixed ring, one end of each of the plurality of rotating seats is rotatably connected to a connecting rod, and the end of the connecting rod away from the rotating seat is rotatably connected to a roller.

[0015] Preferably, a plurality of fixing plates are evenly spaced and fixedly connected to the outer side of one end surface of the fixing ring, a telescopic spring is fixedly connected to the middle of the lower end surfaces of the plurality of fixing plates, and the lower end of the telescopic spring is fixedly connected to the middle of the connecting rod.

[0016] Beneficial effects of the present invention: The round tube polishing machine for automobile parts production has a round tube support assembly that effectively solves the problem of tilting of the tapered exhaust round tube due to uneven shape during the polishing process. Two round tube support assemblies are specially set, which are located on both sides of the polishing assembly, respectively, and can provide stable and adaptable support for the gradually tapering shape of the tapered round tube, ensuring the efficient progress of the polishing operation. In addition, the polishing machine is also equipped with a discharge rack and a discharge rack, which further optimizes the operation process and does not require manual material discharge and material picking, thereby improving the consistency of the surface quality of the tapered exhaust round tube before and after polishing, thereby significantly improving the manufacturing accuracy and aesthetics of automobile parts. In summary, the round tube polishing machine greatly improves the polishing quality of the tapered exhaust round tube while ensuring the polishing efficiency, meeting the specific needs of some automobile companies for the polishing of the tapered exhaust round tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the fixing ring of the present invention; Figure 3 This is a schematic diagram of the three-dimensional structure of the lifting plate of the present invention; Figure 4 It is a three-dimensional cross-sectional schematic diagram of the material discharging frame of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the material unloading rack of the present invention; Figure 6 for Figure 5 Enlarged view of point A in the middle.

[0019] The markings in the figure are: 1. Bottom plate; 2. Lifting plate; 3. Bracket; 4. Discharge rack; 5. Fixed ring; 6. Discharge rack; 7. Fixed plate; 8. Telescopic spring; 9. Connecting rod; 10. Roller; 11. Rotating seat; 12. Reset spring; 13. Guide column; 14. Guide wheel; 15. Polishing wheel; 16. Driven gear; 17. Toothed belt; 18. Servo motor; 19. Driving gear; 20. Support plate; 21. Guide plate; 22. Limit plate; 23. First support frame; 24. Push rod; 25. Connecting plate; 26. Multi-stage cylinder; 27. Second support frame; 28. Baffle. DETAILED DESCRIPTION

[0020] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0021] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0022] like Figures 1 to 6 As shown, a round tube polishing machine for automobile parts production comprises a bottom plate 1, a polishing assembly is arranged at the middle of the upper end of the bottom plate 1, and the polishing assembly is used to grind and polish the surface of the conical exhaust round tube, a discharge rack 4 for placing unpolished conical exhaust round tubes is fixedly connected to one side of the upper end surface of the bottom plate 1, and a discharge rack 6 for assisting in the discharge of the conical exhaust round tubes after polishing is completed is fixedly connected to the side of the upper end surface of the bottom plate 1 away from the discharge rack 4, and a round tube support assembly is arranged at the upper end surface of the bottom plate 1, and two round tube support assemblies are arranged respectively on both sides of the middle of the upper end surface of the bottom plate 1, and the round tube support assemblies are used to support the round tube for polishing; The round tube support assembly on the polishing machine effectively solves the problem of tilting of the tapered exhaust round tube due to uneven shape during the polishing process. The round tube support assembly is specially configured in two, which are located on both sides of the polishing assembly, respectively, and can provide stable and adaptable support for the gradually tapering shape of the tapered round tube, thereby ensuring efficient polishing operations. In addition, the polishing machine is also equipped with a discharge rack 4 and a discharge rack 6, which further optimizes the operating process and eliminates the need for manual material discharge and material picking, thereby improving the consistency of the surface quality of the tapered exhaust round tube before and after polishing, thereby significantly improving the manufacturing accuracy and aesthetics of automotive parts. In summary, the round tube polishing machine greatly improves the polishing quality of the tapered exhaust round tube while ensuring polishing efficiency, thereby meeting the specific needs of some automobile companies for tapered exhaust round tube polishing operations.

[0023] Further, such as Figure 1 and Figure 3 As shown, the polishing assembly includes a lifting plate 2, and the four corners of the lifting plate 2 are slidably connected with guide columns 13, and the four corners of the lower end surface of the lifting plate 2 are fixedly connected with return springs 12, and the return springs 12 are sleeved on the outside of the guide columns 13, and the lower end surface of the return springs 12 is fixedly connected to the bottom plate 1, and the upper end surfaces of the four guide columns 13 are fixedly connected with baffles 28, and a servo motor 18 is provided on one side of the middle part of the upper end surface of the lifting plate 2, and the output end of the servo motor 18 is fixedly connected with a driving gear 19, and the front and rear ends of the outer wall of the driving gear 19 are both transmission-connected with toothed belts 17, and the upper ends of the two toothed belts 17 are both transmission-connected with driven gears 16, and one side end surface of the two driven gears 16 is fixedly connected with a transmission shaft, and the middle parts of the outer walls of the two transmission shafts are rotatably connected with a support plate 20, and the ends of the two transmission shafts away from the driven gear 16 are respectively fixedly connected with a guide wheel 14 and a polishing wheel 15; The servo motor 18 is started, and its output end drives the driving gear 19 to rotate. The driving gear 19 synchronously drives two driven gears 16 through the toothed belts 17 at the front and rear ends. The two driven gears 16 are respectively mounted on the support plate 20 and connected thereto through the transmission shaft. The rotation of the driven gear 16 drives the guide wheel 14 and the polishing wheel 15 on their respective transmission shafts to rotate synchronously. The guide wheel 14 is designed to contact and drive the conical exhaust pipe to rotate, and the friction force causes the pipe to move forward along a predetermined path, thereby realizing the continuous feeding and rotation of the pipe, and providing the necessary motion conditions for the polishing operation. At the same time, the lifting plate 2 passes through the four corners. The guide column 13 is slidably connected above the base plate 1, and the reset spring 12 is sleeved on the outside of the guide column 13 and connected between the lifting plate 2 and the base plate 1, providing elastic support for the lifting plate 2. During the polishing process, as the pressure of the polishing wheel 15 on the surface of the conical tube changes, the lifting plate 2 can be fine-tuned up and down under the action of the reset spring 12. This adaptive lifting mechanism ensures that the polishing wheel 15 can always maintain a stable contact pressure with the surface of the tube, thereby assisting in the uniform polishing of the conical tube. Through this design, the polishing assembly not only achieves efficient polishing of the conical tube, but also ensures the stability and consistency of the polishing quality.

[0024] Further, such as Figure 5 and Figure 6 As shown, the lower end surface of the unloading rack 4 is evenly spaced and fixedly connected with a plurality of second support frames 27, the lower ends of the plurality of second support frames 27 are all fixedly connected to the bottom plate 1, one side of the upper end of the second support frame 27 is inclined and fixedly connected with the limiting plate 22, the lower end surface of the unloading rack 4 is fixedly connected with the bracket 3 on the side away from the discharge rack 6, and a multi-stage cylinder 26 is provided on one end surface of the bracket 3, and a push rod 24 is fixedly connected to the output end of the multi-stage cylinder 26, and the push rod 24 is conical, and a plurality of connecting plates 25 are evenly spaced and fixedly connected to the outer side of the end surface of the push rod 24 close to the multi-stage cylinder 26; The unloading rack 4 is used to neatly stack unpolished conical exhaust round pipes. Its lower end is firmly connected to the bottom plate 1 through a plurality of evenly spaced second support frames 27, ensuring the overall stability and load-bearing capacity of the unloading rack 4. The upper end of the second support frame 27 is inclined and provided with a limit plate 22, which helps to guide the round pipes to align naturally when stacking and prevents the round pipes from slipping or misaligning during the pushing process. When the polishing operation is ready to start, the output end of the multi-stage cylinder 26 pushes the conical push rod 24 forward. The special conical design of the push rod 24 enables it to be easily inserted into the interior of the conical exhaust round pipe without causing any scratches on the outer wall or affecting the polishing effect. The push rod 24 is close to the multi-stage cylinder 26. One side is reinforced by multiple connecting plates 25, which not only enhances the structural strength of the push rod 24, but also ensures stability and accuracy during the pushing process. With the continuous pushing of the multi-stage cylinder 26, the conical push rod 24 pushes the bottom tube out of the discharge rack 4 and moves it along a preset path toward the polishing assembly. During this process, the conical design of the push rod 24 ensures that the tube can maintain center alignment during pushing, while avoiding any unnecessary contact with the outer wall, thereby protecting the original surface state of the tube, laying a good foundation for subsequent polishing operations, and realizing efficient and lossless pushing and positioning of the conical exhaust tube, providing a strong guarantee for the successful polishing operation.

[0025] Further, such as Figure 4 As shown, a plurality of first support frames 23 are fixedly connected to one side of the lower end surface of the discharge rack 6, and the lower end surfaces of the plurality of first support frames 23 are fixedly connected to the bottom plate 1, and a guide plate 21 is fixedly connected to the middle of one end surface of the first support frame 23, and the guide plate 21 is inclined, and the middle part of the discharge rack 6 is inclined toward one side of the guide plate 21; The discharge rack 6 is firmly connected to the bottom plate 1 through a plurality of first support frames 23, ensuring the overall stability and load-bearing capacity of the discharge rack 6. In the design of the discharge rack 6, the middle portion is inclined toward the guide plate 21. The setting of this inclination angle is to utilize the effect of gravity to guide the polished round tube to slide naturally onto the guide plate 21. The guide plate 21 is inclined to ensure that the round tube can maintain a stable motion trajectory during the sliding process. When the polishing assembly completes the polishing operation of a conical exhaust round tube, the multi-stage cylinder 26 pushes the round tube to slide along the middle of the discharge rack 6 toward the guide plate 21 under the combined effect of gravity and the inclination angle of the discharge rack 6. Subsequently, the round tube continues to slide down along the inclined surface of the guide plate 21 until it finally leaves the discharge area, completing the entire process from polishing to discharge.

[0026] Further, such as Figure 1 and Figure 2As shown, the round tube support assembly includes a fixed ring 5 fixedly connected to the bottom plate 1, a plurality of rotating seats 11 are evenly spaced and fixedly connected inside the fixed ring 5, one end of each of the plurality of rotating seats 11 is rotatably connected to a connecting rod 9, and one end of the connecting rod 9 away from the rotating seat 11 is rotatably connected to a roller 10, a plurality of fixed plates 7 are evenly spaced and fixedly connected to the outer side of one end surface of the fixed ring 5, a telescopic spring 8 is fixedly connected to the middle of the lower end surface of each of the plurality of fixed plates 7, and the lower end of the telescopic spring 8 is fixedly connected to the middle of the connecting rod 9; The circular tube support assembly is composed of key components such as a fixed ring 5, a rotating seat 11, a connecting rod 9, a roller 10, a fixed plate 7 and a telescopic spring 8 fixedly connected to the base plate 1. A plurality of rotating seats 11 are evenly spaced and fixedly connected inside the fixed ring 5. These rotating seats 11 provide a rotating fulcrum for the connecting rod 9. One end of the connecting rod 9 is rotatably connected to the rotating seat 11, and the other end is rotatably connected to the roller 10. In this way, the roller 10 can roll freely inside the fixed ring 5 while maintaining a certain supporting force. In order to further enhance the stability and adaptability of the support, a plurality of fixed plates 7 are evenly spaced and fixedly connected to the outer side of one end surface of the fixed ring 5. The middle parts of the lower end surfaces of these fixed plates 7 are fixedly connected to telescopic springs 8, and the lower ends of the telescopic springs 8 are fixedly connected to the middle part of the connecting rod 9. This design allows the connecting rod 9 and the roller 10 to have a certain elastic buffer when subjected to the pressure of the circular tube, and can also be adaptively adjusted according to the shape of the circular tube. When the conical exhaust circular tube is pushed to the ejection point by the multi-stage cylinder 26 When the optical component is in contact with the roller 10 of the circular tube support component, the roller 10 will adaptively roll and support according to the conical shape of the circular tube. Due to the elastic action of the connecting rod 9 and the telescopic spring 8, the roller 10 can fit closely to the surface of the circular tube and provide stable supporting force. Even if the diameter of the circular tube gradually changes, the roller 10 can maintain contact with the surface of the circular tube through the expansion and contraction of the telescopic spring 8 and the rotation of the connecting rod 9, thereby ensuring that the circular tube will not tilt during the polishing process. In addition, since the rollers 10 are evenly spaced inside the fixed ring 5, they can act together on multiple points of the circular tube to form multi-point support. This multi-point support method further enhances the stability of the circular tube during the polishing process and avoids the tilting problem caused by insufficient single-point support. In summary, the circular tube support component realizes stable support for the conical exhaust circular tube during the polishing process through the adaptive rolling of the roller 10 and the elastic buffering effect of the telescopic spring 8, thereby enhancing the applicability and flexibility of the polishing machine.

[0027] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0028] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A round tube polishing machine for automobile parts production, characterized in that: The invention comprises a bottom plate (1), wherein a polishing assembly is arranged at the middle of the upper end of the bottom plate (1), and the polishing assembly is used to grind and polish the surface of the conical exhaust round pipe; a discharge rack (4) for placing unpolished conical exhaust round pipes is fixedly connected to one side of the upper end surface of the bottom plate (1); a discharge rack (6) for assisting in the discharge of the conical exhaust round pipes after polishing is completed is fixedly connected to the side of the upper end surface of the bottom plate (1) away from the discharge rack (4); and a round pipe support assembly is arranged at the upper end surface of the bottom plate (1); two round pipe support assemblies are arranged respectively at two sides of the middle of the upper end surface of the bottom plate (1), and the round pipe support assemblies are used to support the round pipe for polishing.

2. A round tube polishing machine for automobile parts production according to claim 1, characterized in that: The polishing assembly comprises a lifting plate (2), the four corners of the lifting plate (2) are slidably connected to guide columns (13), the four corners of the lower end surface of the lifting plate (2) are fixedly connected to return springs (12), the return springs (12) are sleeved outside the guide columns (13), and the lower end surface of the return spring (12) is fixedly connected to the bottom plate (1).

3. A round tube polishing machine for automobile parts production according to claim 2, characterized in that: The upper end surfaces of the four guide columns (13) are all fixedly connected with baffles (28).

4. A round tube polishing machine for automobile parts production according to claim 3, characterized in that: A servo motor (18) is provided on one side of the middle portion of the upper end surface of the lifting plate (2); an output end of the servo motor (18) is fixedly connected to a driving gear (19); front and rear ends of the outer wall of the driving gear (19) are both transmission-connected to toothed belts (17); and the upper ends of the two toothed belts (17) are both transmission-connected to driven gears (16).

5. A round tube polishing machine for automobile parts production according to claim 4, characterized in that: One side end surface of the two driven gears (16) is fixedly connected to a transmission shaft, the middle parts of the outer walls of the two transmission shafts are rotatably connected to a support plate (20), and one end of the two transmission shafts away from the driven gears (16) is fixedly connected to a guide wheel (14) and a polishing wheel (15) respectively.

6. A round tube polishing machine for automobile parts production according to claim 5, characterized in that: The lower end surface of the unloading rack (4) is evenly spaced and fixedly connected to a plurality of second support racks (27); the lower ends of the plurality of second support racks (27) are all fixedly connected to the bottom plate (1); one side of the upper end of the second support rack (27) is inclined and fixedly connected to a limiting plate (22).

7. A round tube polishing machine for automobile parts production according to claim 6, characterized in that: A bracket (3) is fixedly connected to a side of the lower end face of the material unloading rack (4) away from the material discharging rack (6); a multi-stage cylinder (26) is arranged on one end face of the bracket (3); a push rod (24) is fixedly connected to the output end of the multi-stage cylinder (26); the push rod (24) is conical; and a plurality of connecting plates (25) are evenly spaced and fixedly connected to the outer side of the end face of the push rod (24) close to the multi-stage cylinder (26).

8. A round tube polishing machine for automobile parts production according to claim 7, characterized in that: A plurality of first support frames (23) are fixedly connected to one side of the lower end surface of the discharge frame (6), the lower end surfaces of the plurality of first support frames (23) are all fixedly connected to the bottom plate (1), a guide plate (21) is fixedly connected to the middle part of one end surface of the first support frame (23), the guide plate (21) is arranged obliquely, and the middle part of the discharge frame (6) is inclined toward one side of the guide plate (21).

9. A round tube polishing machine for automobile parts production according to claim 8, characterized in that: The circular tube support assembly comprises a fixing ring (5) fixedly connected to a base plate (1), a plurality of rotating seats (11) being evenly spaced and fixedly connected inside the fixing ring (5), one end of each of the plurality of rotating seats (11) being rotatably connected to a connecting rod (9), and an end of the connecting rod (9) away from the rotating seat (11) being rotatably connected to a roller (10).

10. A round tube polishing machine for automobile parts production according to claim 9, characterized in that: A plurality of fixing plates (7) are evenly spaced and fixedly connected to the outer side of one end surface of the fixing ring (5); a telescopic spring (8) is fixedly connected to the middle of the lower end surfaces of the plurality of fixing plates (7); and the lower end of the telescopic spring (8) is fixedly connected to the middle of the connecting rod (9).

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