Surface polishing treatment apparatus and treatment method for metal working

Abstract

The application discloses a surface polishing treatment equipment for metal processing, which belongs to the technical field of metal processing and comprises a base. A mounting seat is fixedly arranged on the upper surface of the middle section of the base. Driving motors are fixedly arranged at the two ends of the base. Driving rollers are rotatably arranged at the two ends of the base. Metal pipes are arranged between two adjacent driving rollers. A centering conveying mechanism is arranged on the surface of the base. The metal pipes are sequentially conveyed to specified positions and polished. The centering conveying mechanism comprises a center rod arranged between the two driving rollers. The surface polishing treatment equipment for metal processing supports the inner surface of the metal pipe by means of the center rod, the supporting slide rods and the centering wheels, so that the metal pipe can be accurately moved to the surface of the driving roller during transportation and deviation during conveying is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metal processing, in particular to a surface polishing treatment equipment and treatment method for metal processing. BACKGROUND

[0002] In the field of metal processing, the polishing treatment of the surface of the metal pipe is an important process link, which plays a key role in improving the surface quality, aesthetic degree and subsequent use performance of the metal pipe. The traditional metal pipe polishing equipment has many shortcomings in actual application. For example, in the conveying and positioning of the metal pipe, there is often a lack of precise and stable centering mechanism, and the metal pipe is prone to position deviation during conveying, which not only leads to uneven polishing and affects the polishing quality, but also may damage the metal pipe or the equipment itself due to the collision between the metal pipe and the equipment parts. At the same time, in the cleaning link before polishing, most equipment does not pay enough attention. During the process of rough machining to finish machining, the surface of the metal pipe may be attached with various dust, impurities and other pollutants. If these pollutants are not effectively removed before polishing, they may be embedded in the surface of the metal pipe during the polishing process, forming scratches or pits, which seriously reduces the surface smoothness of the metal pipe and also accelerates the wear of the polishing roller, shortening the service life of the polishing roller.

[0003] In addition, in the relative positioning and support of the metal pipe and the polishing roller, the traditional equipment also has defects, which cannot ensure that the metal pipe is always in the best polishing position during polishing, and may not be in sufficient contact with the polishing roller, resulting in unsatisfactory polishing effect and the need for secondary polishing, which reduces the production efficiency. SUMMARY

[0004] The present application aims to provide a surface polishing treatment equipment and treatment method for metal processing to solve the problem of poor polishing method in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solution: a surface polishing treatment equipment for metal processing, comprising a base, an installation seat is fixedly arranged on the upper surface of the middle section of the base, drive motors are fixedly installed at both ends of the base, and drive rollers are rotatably installed at both ends of the base, a metal pipe is placed between two adjacent drive rollers, a polishing roller is arranged on the upper surface of the base below the metal pipe, and a centering conveying mechanism is arranged on the surface of the base, so that the metal pipe moves to a specified position and receives polishing through sequential conveying of the metal pipe.

[0006] The centering conveying mechanism comprises a center rod arranged between the two driving rollers, both ends of the center rod are provided with a centering rod, both ends of the centering rod are provided with a rotating limiting rotary rod, one end of the limiting rotary rod away from the centering rod is provided with a rotating positioning rod, the limiting rotary rod is rotationally connected with the center rod through the positioning rod, the positioning rod is rotationally connected with the center rod, the outer surface of the centering rod is fixedly provided with a support seat, one end of the support seat away from the centering rod is provided with a sliding support sliding rod, one end of the support sliding rod away from the centering rod is provided with a rotating centering wheel, one end of the centering rod is internally provided with a limiting electric push rod, one end of the limiting rotary rod is internally provided with a piston cavity, one end of a piston rod in the piston cavity is arranged, and the other end of the piston rod penetrates through the outer surface of the limiting rotary rod, one end of the limiting rotary rod is provided with a sliding support top rod, one end of the limiting rotary rod is provided with a rotating contact plate, the upper surface of the base is fixedly provided with a lower locking electric push rod, the upper surface of the base is fixedly provided with an upper locking electric push rod, and the outer surface of one end of the positioning rod is uniformly provided with a locking groove.

[0007] Preferably, the support seat and the support sliding rod are connected by a spring, and the support sliding rod is attached to the inner surface of the metal pipe through the centering wheel.

[0008] The above technical scheme uses the elasticity of the spring to ensure that the support sliding rod always tightly attaches to the centering wheel, effectively maintaining the stability of the center position of the metal pipe during conveying.

[0009] Preferably, one end of the limiting electric push rod is rotationally connected with one end of the piston rod outside the piston cavity, and the piston rod and the piston cavity are in sliding friction connection.

[0010] The above technical scheme uses the flexible driving of the limiting electric push rod on the piston rod to accurately adjust the internal pressure of the piston cavity, thereby ensuring the stable positioning of the metal pipe.

[0011] Preferably, the support top rod and the limiting rotary rod are in sliding friction connection, the internal cavity of the limiting rotary rod where the support top rod is located is in communication with one end of the piston cavity, the support top rod and the limiting rotary rod are connected by a spring, one end of the support top rod outside the limiting rotary rod is designed as a hemisphere, and the hemisphere end of the support top rod is attached to the inner surface of the contact plate.

[0012] The above technical scheme uses the attachment design of the hemisphere end of the support top rod and the contact plate to effectively transmit pressure and change the angle of the contact plate, so that the contact plate better attaches to the inner wall of the metal pipe.

[0013] Preferably, the contact plate is designed in an arc-shaped plate shape, and a spring is connected between the contact plate and the outer surface of the limiting rotating rod, and the outer surface of the contact plate is attached to the inner surface of the metal pipe, and the ends of the lower locking electric push rod and the upper locking electric push rod facing each other are clamped and installed in the locking groove on the surface of the positioning rod.

[0014] By adopting the technical scheme, the arc-shaped contact plate can better adapt to the circular inner wall of the metal pipe, and the clamping of the upper and lower locking electric push rods and the locking groove of the positioning rod can firmly lock the position of the metal pipe after centering.

[0015] Preferably, the surface of the mounting seat is provided with a conveying and cleaning mechanism, which can ensure that the effect of subsequent polishing is not affected by cleaning the dust on the surface of the metal pipe during conveying;

[0016] The conveying and cleaning mechanism comprises a conveying motor fixedly installed on the outer surface of the mounting seat, and the output shaft of the conveying motor penetrates the inner surface of the mounting seat, and the output shaft of the conveying motor is fixedly connected with a linkage gear at one end, and the inner surface of the mounting seat is provided with a rotating cleaning conveying roller, and the outer surfaces of the two ends of the cleaning conveying roller are fixedly provided with transmission gears.

[0017] By adopting the technical scheme, the metal pipe can be cleaned after rough polishing.

[0018] Preferably, the cleaning conveying roller is connected with the linkage gear through the transmission gears, and the two cleaning conveying rollers are located on the upper and lower sides of the center rod, the outer surface of the upper cleaning conveying roller is uniformly provided with bristles, and the minimum distance between the outer surface of the upper cleaning conveying roller and the center rod is greater than the minimum distance between the outer surface of the lower cleaning conveying roller and the center rod.

[0019] By adopting the technical scheme, the stable rotation of the cleaning conveying roller is realized by the precise meshing of the transmission gears and the linkage gears, and the position design of the upper and lower rollers and the bristle setting of the upper roller can efficiently remove the dust and impurities on the surface of the metal pipe during conveying, thereby improving the cleanliness of the metal pipe before polishing.

[0020] Preferably, the surfaces of the base and the mounting seat are provided with an auxiliary positioning mechanism, which can position and support the metal pipe and the polishing roller, so that the metal pipe can be stably and sufficiently polished by the polishing roller at a predetermined position.

[0021] The auxiliary positioning mechanism comprises: a pressing electric push rod fixedly arranged on the upper end outer surface of the mounting seat, a sliding pressing plate mounted on the outer surface of the mounting seat, and the lower end of the pressing electric push rod fixedly connected with the pressing plate, a rotating piston cylinder mounted on the lower surface of the pressing plate, a sliding pressing rod mounted on the lower end of the piston cylinder, and a rotating contact wheel mounted on the lower end of the pressing rod, and the upper end outer surface of the lower locking electric push rod is fixedly provided with a lifting rod, the outer surface of the two ends of the polishing roller is uniformly provided with a limiting hole, and the upper surface of the base is mounted with a sliding lifting frame, and the lower end of the lifting frame is mounted with a sliding contact frame.

[0022] The above technical scheme guarantees that the polishing roller will not lose contact with the metal pipe, resulting in polishing failure.

[0023] Preferably, the pressing plate is fixedly connected with the upper locking electric push rod, a spring is connected between the upper end outer surface of the piston cylinder and the pressing plate, the piston cylinder and the pressing rod are in sliding friction connection, and a spring is connected between the piston cylinder and the pressing rod, the lower end of the lifting rod is attached to the lower surface of the contact frame, a spring is connected between the contact frame and the lifting frame, the upper end of the lifting frame is arc-shaped, a columnar protrusion is arranged on the inner surface of the upper end of the lifting frame, and the lifting frame is installed by being clamped with the limiting hole through the columnar protrusion.

[0024] The cooperation of the lifting rod with the contact frame and the lifting frame can stably support the polishing roller and guarantee the stability of the polishing roller during polishing.

[0025] Compared with the prior art, the metal surface polishing treatment equipment has the following beneficial effects:

[0026] 1. The center rod cooperates with the supporting slide rod and the centering wheel to support the inner surface of the metal pipe, so that the metal pipe can be accurately moved to the surface of the driving drum during transportation, avoiding deviation during transportation.

[0027] Further, the one-side contact plate is unfolded in advance during the transportation of the metal pipe, the unfolded outer surface of the contact plate abuts against the inner surface of the moving metal pipe, so that the metal pipe can be limited after being transported to the position, and the other-side contact plate is unfolded to stably limit the metal pipe, guaranteeing that the metal pipe will not move horizontally during polishing.

[0028] 2. The cleaning conveying roller in the conveying cleaning mechanism is connected through the meshing of the transmission gear and the linkage gear, and the cooperative operation with the conveying motor is realized. The cleaning conveying roller with the brush on the upper center rod can comprehensively and efficiently clean the surface of the metal pipe during the conveying of the metal pipe. The specific design of the distance between the outer surface of the metal pipe and the center rod axis enables the brush to fully contact each part of the surface of the metal pipe, effectively removing the dust, impurities and other pollutants attached to the metal pipe during the processing, conveying or storage process. This not only improves the surface quality of the metal pipe and avoids the damage of the pollutants to the metal pipe and the polishing roller during the polishing process, but also prolongs the service life of the polishing roller and reduces the maintenance cost of the equipment.

[0029] Further, through such design, the cleaning operation is simultaneously completed during the conveying process without increasing the equipment floor area. Compared with the traditional equipment which needs to separately set the cleaning station and the conveying device, the present application greatly improves the compactness and efficiency of the production process.

[0030] 3. The pressing electric push rod in the auxiliary positioning mechanism drives the pressing plate to move up and down, and then the piston cylinder, the pressing rod and the contact wheel apply appropriate pressure to the metal pipe. This design can accurately adjust the contact state of the metal pipe with the polishing roller according to the specific situation of the metal pipe, ensure that the metal pipe is in full contact with the polishing roller during the polishing process, and realize uniform and efficient polishing. For the metal pipe with slight difference in surface flatness, the pressing force can be adjusted to ensure that the entire pipe surface can be well polished, effectively improving the polishing quality and reducing the polishing defects caused by poor contact.

[0031] Further, through the contact between the inclined pressing rod of the pressing plate during the downward movement and the outer surface of the metal pipe through the contact wheel, the metal pipe can stably continue to move after being separated from the contact with the cleaning conveying roller and abutting against the contact plate, improving the accuracy of positioning. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present application;

[0033] Figure 2 It is a schematic diagram of the connection of the pressing plate, the pressing rod and the contact wheel of the present application;

[0034] Figure 3 It is a schematic diagram of the overall cross-sectional surface of the present application;

[0035] Figure 4 It is a schematic diagram of the connection of the lifting frame and the contact frame of the present application;

[0036] Figure 5 It is a schematic diagram of the connection of the positioning rod, the limiting rotary rod and the centering rod of the present application;

[0037] Figure 6 It is a schematic diagram of the connection of the cleaning conveying roller, the transmission gear and the linkage gear of the application;

[0038] Figure 7 It is a schematic diagram of the connection of the mounting seat and the linkage gear of the application;

[0039] Figure 8 It is a schematic diagram of the connection of the polishing roller and the lifting frame of the application.

[0040] In the figure: 1, base; 2, mounting seat; 3, drive motor; 4, drive roller; 5, metal pipe; 6, polishing roller; 7, center rod; 8, positioning rod; 9, limiting rotary rod; 10, centering rod; 11, support seat; 12, support sliding rod; 13, centering wheel; 14, limiting electric push rod; 15, piston cavity; 16, piston rod; 17, support top rod; 18, contact plate; 19, lower locking electric push rod; 20, upper locking electric push rod; 21, locking groove; 22, cleaning conveying roller; 23, transmission gear; 24, linkage gear; 25, conveying motor; 26, pressing electric push rod; 27, pressing plate; 28, piston cylinder; 29, pressing rod; 30, contact wheel; 31, lifting rod; 32, limiting hole; 33, lifting frame; 34, contact frame. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0042] Please refer to Figures 1-8 The application provides a technical solution: a surface polishing treatment device for metal processing.

[0043] Embodiment one: In this embodiment, a base 1 is disclosed. A mounting seat 2 is fixedly arranged on the upper surface of the middle section of the base 1. Drive motors 3 are fixedly installed at both ends of the base 1. Rotatable drive rollers 4 are installed at both ends of the base 1. Metal pipes 5 are placed between two adjacent drive rollers 4. A polishing roller 6 is arranged on the upper surface of the base 1 directly below the metal pipe 5. A centering conveying mechanism is arranged on the surface of the base 1. The metal pipe 5 is sequentially conveyed to a specified position and polished.

[0044] The centering conveying mechanism comprises a center rod 7 arranged between the two driving rollers 4, both ends of the center rod 7 are provided with a centering rod 10, both ends of the centering rod 10 are provided with a rotating limiting rotary rod 9, one end of the limiting rotary rod 9 away from the centering rod 10 is provided with a rotating positioning rod 8, the limiting rotary rod 9 is rotationally connected with the center rod 7 through the positioning rod 8, the positioning rod 8 is rotationally connected with the center rod 7, the outer surface of the centering rod 10 is fixedly provided with a supporting seat 11, one end of the supporting seat 11 away from the centering rod 10 is provided with a sliding supporting sliding rod 12, one end of the supporting sliding rod 12 away from the centering rod 10 is provided with a rotating centering wheel 13, one end of the centering rod 10 towards the limiting rotary rod 9 is internally provided with a limiting electric push rod 14, one end of the limiting rotary rod 9 towards the centering rod 10 is internally provided with a piston cavity 15, one end of a piston rod 16 is arranged in the piston cavity 15, the other end of the piston rod 16 penetrates through the outer surface of the limiting rotary rod 9, one end of the limiting rotary rod 9 is provided with a sliding supporting top rod 17, one end of the supporting top rod 17 is provided with a rotating contact plate 18, the upper surface of the base 1 is fixedly provided with a lower locking electric push rod 19, the upper locking electric push rod 20 is arranged above the lower locking electric push rod 19, the outer surface of one end of the positioning rod 8 is uniformly provided with a locking groove 21;

[0045] The supporting seat 11 and the supporting sliding rod 12 are connected with springs, and the supporting sliding rod 12 is attached to the inner surface of the metal pipe 5 through the centering wheel 13;

[0046] One end of the limiting electric push rod 14 and one end of the piston rod 16 outside the piston cavity 15 are rotationally connected, and the piston rod 16 and the piston cavity 15 are slidingly and frictionally connected;

[0047] The supporting top rod 17 and the limiting rotary rod 9 are slidingly and frictionally connected, the inner cavity of the limiting rotary rod 9 where the supporting top rod 17 is located is connected with one end of the piston cavity 15, the supporting top rod 17 and the limiting rotary rod 9 are connected with springs, one end of the supporting top rod 17 outside the limiting rotary rod 9 is designed in a hemispherical shape, and the hemispherical end of the supporting top rod 17 is attached to the inner surface of the contact plate 18;

[0048] The contact plate 18 is designed in an arc plate shape, springs are arranged between the outer surface of the contact plate 18 and the limiting rotary rod 9, and the outer surface of the contact plate 18 is attached to the inner surface of the metal pipe 5, the locking grooves 21 on the surface of the positioning rod 8 are engaged with the lower locking electric push rod 19 and the upper locking electric push rod 20;

[0049] In the normal use process, first, the metal pipe 5 to be processed is placed on the surface of the driving roller 4 on one side, and then the limiting electric push rod 14 inside the one end of the centering rod 10 on the side of the metal pipe 5 is started. The limiting electric push rod 14 drives the piston rod 16 to slide through the pressure of the piston cavity 15 inside to push the support top rod 17, so that the support top rod 17 slides to support the contact plate 18 to make the contact plate 18 open. At this time, the metal pipe 5 is continuously pushed until one end of the metal pipe 5 abuts against the inner surface of the metal pipe 5. The inner wall of the metal pipe 5 contacts the centering wheel 13 installed on the support slide rod 12 on the outer surface of the support seat 11 and is centered under the support of the spring between the support slide rod 12 and the support seat 11. At this time, the limiting electric push rod 14 inside the other end of the centering rod 10 on which the metal pipe 5 is located is started to make the other end of the metal pipe 5 be limited by the open contact plate 18. At this time, the driving motor 3 on the upper surface of the base 1 at both ends is started to drive the driving roller 4 to rotate, and the driving roller 4 drives the metal pipe 5 to rotate to perform preliminary rough polishing through the contact friction with the surface of the polishing roller 6. In the process, the limiting rotary rod 9 and the centering rod 10 rotate synchronously with the positioning rod 8 and the center rod 7, while the lower locking electric push rod 19 and the upper locking electric push rod 20 are stably locked with the positioning rod 8 through the stable locking of the locking groove 21 on the surface of the positioning rod 8 to realize the stable limiting of the positioning rod 8, so that the displacement of the positioning rod 8 in the polishing process is prevented.

[0050] When the preliminary rough polishing is completed, the limiting electric push rod 14 of the centering rod 10 on both ends on which the metal pipe 5 is located is started to make the contact plate 18 release the limiting of the metal pipe 5. Then, another metal pipe 5 to be processed is pushed into the centering rod 10 on which the current metal pipe 5 is located. The metal pipe 5 that has been polished is continuously driven to pass through the mounting seat 2, and then the above process is repeated to continue polishing the pushed-in metal pipe 5.

[0051] In the embodiment, the surface of the mounting seat 2 is provided with a conveying and cleaning mechanism. The conveying and cleaning mechanism can clean the dust on the surface of the metal pipe 5 during conveying to ensure that the effect of subsequent polishing is not affected.

[0052] The conveying and cleaning mechanism comprises a conveying motor 25. The conveying motor 25 is fixedly installed on the outer surface of the mounting seat 2, and the output shaft of the conveying motor 25 penetrates the inner surface of the mounting seat 2. One end of the output shaft of the conveying motor 25 is fixedly connected with a linkage gear 24. A rotating cleaning conveying roller 22 is installed on the inner surface of the mounting seat 2, and transmission gears 23 are fixedly arranged on the outer surfaces of the two ends of the cleaning conveying roller 22.

[0053] The cleaning conveying roller 22 is connected with the linkage gear 24 through the transmission gear 23, and the two cleaning conveying rollers 22 are respectively located on the upper and lower sides of the center rod 7. The outer surface of the upper cleaning conveying roller 22 is uniformly provided with bristles, and the minimum distance between the outer surface of the upper cleaning conveying roller 22 and the axis of the center rod 7 is greater than the minimum distance between the outer surface of the lower cleaning conveying roller 22 and the axis of the center rod 7.

[0054] When the one end of the metal pipe 5 after rough polishing is pushed to the mounting seat 2, the conveying motor 25 is started to drive the two cleaning conveying rollers 22 to rotate through the transmission gear 23 and the linkage gear 24. The lower cleaning conveying roller 22 drives the metal pipe 5 to move to the surface of the driving roller 4 on the other side, and in the process, the metal pipe 5 is kept in a rotating state under the action of the driving roller 4, while the upper cleaning conveying roller 22 does not directly contact the surface of the metal pipe 5 but cleans the surface of the metal pipe 5 after rough polishing through the bristles on the surface.

[0055] In the embodiment, the surface of the base 1 and the mounting seat 2 is provided with an auxiliary positioning mechanism, which can position and support the metal pipe 5 and the polishing roller 6, so that the metal pipe 5 can be stably polished by the polishing roller 6 at a predetermined position.

[0056] The auxiliary positioning mechanism comprises a pressing electric push rod 26, a pressing plate 27, a piston cylinder 28, a pressing rod 29, a contact wheel 30, a lifting rod 31, a limiting hole 32, a lifting frame 33 and a sliding contact frame 34.

[0057] The pressing plate 27 is fixedly connected with the upper locking electric push rod 20, the upper end of the piston cylinder 28 is connected with the pressing plate 27 through a spring, the piston cylinder 28 is in sliding friction connection with the pressing rod 29, and the piston cylinder 28 is connected with the pressing rod 29 through a spring. The lower end of the lifting rod 31 is in close contact with the lower surface of the contact frame 34, the contact frame 34 is connected with the lifting frame 33 through a spring, the upper end of the lifting frame 33 is arc-shaped, the inner surface of the upper end of the lifting frame 33 is provided with a columnar protrusion, and the lifting frame 33 is installed through the columnar protrusion and the limiting hole 32.

[0058] When the metal tube 5 is pushed onto the upper surface of the driving roller 4, the metal tube 5 is not yet in place, the pressing electric push rod 26 is activated to make the pressing plate 27 move downward, at this time the piston cylinder 28 drives the contact wheel 30 to contact the outer surface of the metal tube 5 through the pressing rod 29, as the pressing plate 27 moves downward, the piston cylinder 28 rotates relative to the pressing plate 27 and the piston cylinder 28 supports the pressing rod 29 through the spring, so that the metal tube 5 is pushed on the driving roller 4 and abuts against the contact plate 18;

[0059] When the metal tube 5 is pushed, the lower locking electric push rod 19 and the upper locking electric push rod 20 on the moving path of the metal tube 5 are activated to retract to avoid blocking the movement of the metal tube 5, and when the metal tube 5 is in place, the lower locking electric push rod 19 and the upper locking electric push rod 20 are activated to extend to restore the support of the centering rod 7, the positioning rod 8, the limiting rotary rod 9 and the centering rod 10 through the engagement with the locking groove 21, at the same time, the lower locking electric push rod 19 drives the contact frame 34 to slide upward through the lower end of the lifting rod 31 in the upward movement of the upper end of the lower locking electric push rod 19, the contact frame 34 exerts pressure on the lifting frame 33 through the spring to enable the lifting frame 33 to stably support the polishing roller 6, so that the polishing roller 6 can maintain contact with the surface of the metal tube 5 for polishing, and the lifting frame 33 ensures that the polishing roller 6 does not rotate during polishing through the engagement of the columnar protrusion with the limiting hole 32;

[0060] After the metal tube 5 is polished by the other polishing roller 6, it is automatically discharged by falling downward under the impact of the next metal tube 5.

[0061] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present application, and it should be understood that the above are only specific embodiments of the present application and do not limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application are included in the protection scope of the present application.

Claims

1. A surface polishing device for metal processing, comprising a base (1), wherein a mounting seat (2) is fixedly disposed on the upper surface of the middle section of the base (1), and a drive motor (3) is fixedly disposed on both ends of the base (1), and rotating drive rollers (4) are disposed on both ends of the base (1), a metal tube (5) is placed between two adjacent drive rollers (4), and a polishing roller (6) is disposed on the upper surface of the base (1) directly below the metal tube (5), characterized in that: The surface of the base (1) is provided with a centering conveying mechanism, through the sequential conveying of the metal pipe (5) makes the metal pipe (5) move to the designated position and accept polishing; The centering conveying mechanism comprises: a center rod (7) provided between the two driving rollers (4), and the two ends of the center rod (7) are provided with a centering rod (10), the two ends of the centering rod (10) are installed with a rotating limiting rotary rod (9), one end of the limiting rotary rod (9) away from the centering rod (10) is installed with a rotating positioning rod (8), and the limiting rotary rod (9) is rotatably connected with the center rod (7) through the positioning rod (8), the positioning rod (8) facing the center rod (7) is rotatably connected with the center rod (7), the outer surface of the centering rod (10) is fixedly provided with a supporting seat (11), one end of the supporting seat (11) away from the centering rod (10) is installed with a sliding supporting slide rod (12), and one end of the supporting slide rod (12) away from the centering rod (10) is installed with a rotating centering wheel (13), one end of the centering rod (10) towards the limiting rotary rod (9) is internally installed with a limiting electric push rod (14), one end of the limiting rotary rod (9) towards the centering rod (10) is internally provided with a piston cavity (15), and one end of the piston rod (16) is arranged in the piston cavity (15), and the other end of the piston rod (16) penetrates through the outer surface of the limiting rotary rod (9), one section of the outer surface of the limiting rotary rod (9) is installed with a sliding supporting jack (17), and one end of the supporting jack (17) is installed with a rotating contact plate (18), the upper surface of the base (1) is fixedly installed with a lower locking electric push rod (19), and the upper locking electric push rod (20) is arranged above the lower locking electric push rod (19), and the outer surface of one end of the positioning rod (8) towards the limiting rotary rod (9) is uniformly provided with a locking groove (21).

2. The surface polishing apparatus for metal working according to claim 1, wherein: The supporting seat (11) and the supporting slide rod (12) are connected by a spring, and the supporting slide rod (12) is attached to the inner surface of the metal pipe (5) through the centering wheel (13).

3. The surface polishing apparatus for metal working according to claim 1, wherein: One end of the limiting electric push rod (14) and the piston rod (16) are rotatably connected outside the piston cavity (15), and the piston rod (16) and the piston cavity (15) are slidingly connected.

4. The surface polishing apparatus for metal working according to claim 1, wherein: The supporting jack (17) and the limiting rotary rod (9) are slidingly connected, and the inner cavity of the supporting jack (17) in the limiting rotary rod (9) is connected with one end of the piston cavity (15), the supporting jack (17) and the limiting rotary rod (9) are connected by a spring, one end of the supporting jack (17) outside the limiting rotary rod (9) is designed as a hemisphere, and the inner surface of the contact plate (18) is attached to the hemispherical end of the supporting jack (17).

5. The surface polishing apparatus for metal working according to claim 1, wherein: The contact plate (18) is arc-shaped plate design, and the contact plate (18) and the outer surface of the limiting rotary rod (9) are connected with springs, and the outer surface of the contact plate (18) is attached to the inner surface of the metal pipe (5), and the opposite ends of the lower locking electric push rod (19) and the upper locking electric push rod (20) are clamped and installed in the locking groove (21) on the surface of the positioning rod (8).

6. The surface polishing apparatus for metal working according to claim 1, wherein: The surface of the mounting seat (2) is provided with a conveying cleaning mechanism, which can clean the dust on the surface of the metal pipe (5) during conveying to ensure that the subsequent polishing effect is not affected; The conveying cleaning mechanism comprises a conveying motor (25) fixedly installed on the outer surface of the mounting seat (2), and the output shaft of the conveying motor (25) penetrates the inner surface of the mounting seat (2), and the output shaft of the conveying motor (25) is fixedly connected with a linkage gear (24), and the inner surface of the mounting seat (2) is provided with a rotating cleaning conveying roller (22), and the outer surfaces of the two ends of the cleaning conveying roller (22) are fixedly provided with transmission gears (23).

7. A surface polishing apparatus for metal working according to claim 6, wherein: The cleaning conveying roller (22) is connected with the linkage gear (24) through the transmission gears (23), and the two cleaning conveying rollers (22) are located on the upper and lower sides of the center rod (7), and the outer surfaces of the cleaning conveying rollers (22) on the upper side of the center rod (7) are uniformly provided with bristles, and the minimum distance between the outer surface of the cleaning conveying roller (22) on the upper side of the center rod (7) and the center axis of the center rod (7) is greater than that of the cleaning conveying roller (22) on the lower side.

8. The surface polishing apparatus for metal working according to claim 1, wherein: The surfaces of the base (1) and the mounting seat (2) are provided with an auxiliary positioning mechanism, which can position and support the metal pipe (5) and the polishing roller (6), so that the metal pipe (5) can be stably and fully polished by the polishing roller (6) at a predetermined position. The auxiliary positioning mechanism comprises a compression electric push rod (26) fixedly arranged on the outer surface of the upper end of the mounting seat (2), a sliding compression plate (27) mounted on the outer surface of the mounting seat (2), and a compression plate (27) fixedly connected with the lower end of the compression electric push rod (26), a rotating piston cylinder (28) mounted on the lower surface of the compression plate (27), a sliding compression rod (29) mounted on the lower end of the piston cylinder (28), and a rotating contact wheel (30) mounted on the lower end of the compression rod (29), an upper end outer surface of the lower locking electric push rod (19) is fixedly provided with a lifting rod (31), outer surfaces of both ends of the polishing roller (6) are uniformly provided with limiting holes (32), an upper surface of the base (1) is provided with a sliding lifting frame (33), and a sliding contact frame (34) is mounted on the lower end of the lifting frame (33).

9. A surface polishing apparatus for metal working according to claim 8, wherein: The pressing plate (27) is fixedly connected with the upper locking electric push rod (20), springs are connected between the outer surface of the upper end of the piston cylinder (28) and the pressing plate (27), the piston cylinder (28) is in sliding frictional connection with the pressing rod (29), and springs are connected between the piston cylinder (28) and the pressing rod (29), the lower end of the lifting rod (31) is attached to the lower surface of the contact frame (34), and springs are connected between the contact frame (34) and the lifting frame (33), the upper end of the lifting frame (33) is designed in an arc shape, the inner surface of the upper end of the lifting frame (33) is provided with a columnar protrusion, and the lifting frame (33) is installed in the limiting hole (32) in a clamping manner through the columnar protrusion.

10. A processing method of a surface polishing treatment apparatus for metal processing according to any one of claims 1 to 9, characterized by: The processing method comprises the following steps: S1, the metal pipe (5) to be processed is placed on the upper surface of the driving roller (4) on one side, and then the limiting electric push rod (14) is started to make the contact plate (18) open to limit the metal pipe (5); S2, the driving motor (3) drives the driving roller (4) to rotate to make the metal pipe (5) contact and rub with the polishing roller (6) to perform preliminary rough polishing; S3, after the preliminary rough polishing is completed, another metal pipe (5) to be processed is pushed into the centering rod (10) where the current metal pipe (5) is located, the metal pipe (5) that has been polished is pushed to pass through the mounting seat (2) and is continuously driven, and then the above process is repeated to continue polishing the pushed metal pipe (5); S4, when one end of the metal pipe (5) that has been polished is pushed to the mounting seat (2), the lower cleaning conveying roller (22) drives the metal pipe (5) to move to the surface of the driving roller (4) on the other side, and in the process, the metal pipe (5) rotates under the action of the driving roller (4); S5, the upper cleaning conveying roller (22) cleans the surface of the metal pipe (5) that has been polished by the bristles on the surface; S6, after the metal pipe (5) moves to the position, the driving motor (3) drives the driving roller (4) to rotate to make the metal pipe (5) contact and rub with the polishing roller (6) to perform fine polishing; S7, after the metal pipe (5) that has been fine polished is pushed by the next metal pipe (5), it falls downward to complete automatic discharge.

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