An automatic polishing apparatus and method for steel processing

Abstract

The application relates to the technical field of steel processing equipment, in particular to automatic polishing equipment and a method for steel processing, which comprises a base and a machine body fixed on the base, the machine body is provided with an extrusion rotating device and a polishing roller, one side of the polishing roller is provided with a reciprocating moving mechanism, the reciprocating moving mechanism is connected with an opening and closing positioning mechanism for clamping the end of the steel, and the base is further provided with an external clamping device arranged opposite to the opening and closing positioning mechanism. The automatic polishing equipment and the method for steel processing are provided with the reciprocating moving mechanism and the opening and closing positioning mechanism, the opening and closing positioning mechanism is formed by a plurality of opening and closing plates and is an extrusion ring, a piston plate and a spring are slidably arranged in a connecting groove, the clamping force can be automatically adjusted according to the size change of the end of the steel, the polishing vibration and the axial movement can be effectively compensated, the surface damage caused by rigid clamping can be avoided, the manual repeated disassembly, assembly and adjustment are reduced, and the processing efficiency of batch polishing and the qualified rate of finished products are greatly improved.

Description

Technical Field

[0001] This invention relates to the field of steel processing equipment technology, specifically to an automated polishing equipment and method for steel processing. Background Technology

[0002] Steel surface polishing is a key process in steel finishing. It is mainly used to remove burrs, oxide layers and processing scratches from the steel surface, and improve the smoothness and gloss of the steel surface. It is widely used in the processing of steel structures, hardware steel and other fields.

[0003] Currently, conventional automated polishing equipment on the market has obvious defects in its grinding mechanism structure. Most of its grinding wheels adopt a fixed installation structure without adaptive fine adjustment and wear compensation mechanism. During the polishing process, the continuous wear of the grinding wheel will cause deviations in the grinding gap and grinding pressure, making it impossible to fit the curved surface and irregular end face of the steel. This easily leads to problems such as missed polishing, over-polishing, and uneven polishing texture. At the same time, the fixed grinding structure has poor adaptability and cannot be adapted to polishing operations of steel of different specifications and irregular shapes. The overall polishing accuracy and processing consistency are difficult to guarantee. The existing workpiece clamping and installation structure of equipment is outdated, mostly using a single fixed fixture with limited mechanical adjustment stroke and extremely poor versatility. The fixtures are mostly rigid locking structures with fixed clamping points, which can easily cause steel to shift or deviate under polishing vibration conditions, resulting in polishing deviations. Furthermore, rigid clamping can easily crush and damage the steel surface. At the same time, fixture disassembly, assembly, and adjustment rely on manual operation, lacking a quick positioning and locking structure. When changing steel of different sizes, repeated disassembly and adjustment are required, which seriously reduces the processing efficiency and finished product qualification rate of batch steel polishing. Therefore, we propose an automated polishing equipment and method for steel processing. Summary of the Invention

[0004] One of the technical problems to be solved in this application is: how to design an automated polishing equipment and method for steel processing with better polishing and clamping effects. To solve the above-mentioned technical problems, this application provides an automated polishing equipment for steel processing, including a base and a body fixed on the base. The body is provided with a pressing and rotating device and a polishing roller. A reciprocating moving mechanism is provided on one side of the polishing roller. An opening and closing positioning mechanism for clamping the end of the steel is connected to the reciprocating moving mechanism. An external clamping device is also provided on the base, which is arranged opposite to the opening and closing positioning mechanism.

[0005] In some embodiments, the reciprocating moving mechanism includes a connecting cylinder, a connecting pipe slidably sleeved within the connecting cylinder, and a U-shaped plate fixed to the end of the connecting pipe, wherein a pneumatic extrusion device and an electric rotator are mounted on the U-shaped plate.

[0006] In some embodiments, the output end of the electric rotator is connected to a Z-shaped rod, a slider is slidably disposed on the Z-shaped rod, and a nozzle and a fan blade are fixed on the slider.

[0007] In some embodiments, a connecting ring is sleeved on the outside of the connecting tube, a sleeve is fixed on the connecting ring, a straight tube is inserted inside the sleeve, and one end of the straight tube is connected to the slider through a connecting rod.

[0008] In some embodiments, a shaft is fixed to the other end of the straight tube, and the shaft is slidably engaged in the slotted plate, which is fixed relative to the U-shaped plate.

[0009] In some embodiments, a support plate is fixed on the slotted plate, the support plate has a sliding groove and a through groove, a rotating plate is rotatably arranged in the sliding groove, and a movable clamp is hinged on the rotating plate, the movable clamp being driven by a cylinder.

[0010] In some embodiments, the opening and closing positioning mechanism includes a compression ring and a pneumatic control device for controlling the movement of the compression ring. The compression ring is composed of multiple opening and closing plates. Each opening and closing plate has an annular groove and a connecting groove on its inner side. A piston plate is slidably disposed in the connecting groove. A slide rod is fixed on the piston plate. A spring is sleeved on the slide rod. A limit block is provided at the end of the slide rod.

[0011] In some embodiments, the external clamping device is coaxially arranged with the opening and closing positioning mechanism, and the clamping center of the external clamping device is coplanar with the polishing surface of the polishing roller.

[0012] This application also provides an automated polishing method for steel processing, comprising the following steps: S1: The two ends of the steel are clamped by the external clamping device and the opening and closing positioning mechanism respectively, and the surface of the steel to be polished is aligned with the polishing roller; S2: Start the extrusion rotation device to drive the polishing roller to rotate, and at the same time start the pneumatic extrusion device to press the polishing roller against the steel surface; S3: Start the reciprocating moving mechanism to drive the polishing roller to move back and forth along the length of the steel, and drive the Z-shaped rod by the electric rotary device to make the nozzle and fan blade swing, so as to cool and remove dust from the polishing area; S4: During the polishing process, the piston plate and spring in the opening and closing positioning mechanism adaptively adjust the clamping force to compensate for the vibration and displacement of the steel end; S5: After polishing, release the external clamping device and the opening and closing positioning mechanism in sequence to remove the steel.

[0013] This invention has at least the following beneficial effects: 1. By setting up a reciprocating moving mechanism and an opening and closing positioning mechanism, the opening and closing positioning mechanism adopts an extrusion ring composed of multiple opening and closing plates, and a piston plate and spring are slidably set in the connecting groove. It can automatically adjust the clamping force according to the size change of the steel end, effectively compensate for polishing vibration and axial movement, avoid surface damage caused by rigid clamping, reduce manual repeated disassembly and adjustment, and greatly improve the processing efficiency and finished product qualification rate of batch polishing.

[0014] 2. The electric rotary device in the reciprocating movement mechanism drives the Z-shaped rod to move the slider back and forth, causing the nozzle and fan blades fixed on the slider to swing synchronously, realizing dynamic cooling and dust removal of the polishing area. At the same time, the polishing roller maintains constant grinding pressure under the action of the pneumatic extrusion device. With the extension and retraction guidance of the connecting pipe in the connecting cylinder, the polishing roller can adapt to the curved surface and irregular end face of the steel, avoiding problems such as missed polishing, over-polishing and uneven texture caused by wear of the grinding wheel or differences in the shape of the workpiece, thereby steadily improving the consistency and smoothness of the steel surface polishing. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the machine body, the extrusion rotation device, and the polishing roller of the present invention; Figure 3 This is a schematic diagram of the structure of the electric rotator, U-shaped plate, and connecting pipe of the present invention; Figure 4 This is a schematic diagram of the structure of the slider, polishing roller, and Z-shaped rod of the present invention; Figure 5 This is an exploded structural diagram of the polishing roller, connecting cylinder, and nozzle of the present invention; Figure 6 This is an exploded structural diagram of the connecting ring, straight pipe, and sleeve of the present invention; Figure 7 This is an exploded structural diagram of the slotted plate, U-shaped plate, and slider of the present invention; Figure 8 This is a schematic diagram of the structure of the support plate, slotted plate, rotating plate and cylinder of the present invention; Figure 9 This is a schematic diagram of the extrusion ring and the opening / closing plate of the present invention; Figure 10 This is a schematic cross-sectional view of the extrusion ring of the present invention.

[0016] In the diagram: 1. Base; 2. Machine body; 3. Extrusion rotation device; 4. Polishing roller; 5. Reciprocating movement mechanism; 51. Connecting cylinder; 52. Connecting pipe; 53. U-shaped plate; 54. Pneumatic extrusion device; 55. Electric rotator; 56. Z-shaped rod; 57. Slider; 58. Nozzle; 59. Fan blade; 510. Connecting ring; 511. Sleeve; 512. Straight pipe; 513. Connecting rod; 514. Shaft; 515. Slotted plate; 516. Support plate; 517. Slide groove; 518. Through groove; 519. Rotating plate; 520. Moving clamp; 521. Cylinder; 6. Opening and closing positioning mechanism; 61. Extrusion ring; 62. Pneumatic control device; 63. Opening and closing plate; 64. Ring groove; 65. Connecting groove; 66. Piston plate; 67. Slide rod; 68. Spring; 69. Limiting block; 7. External clamping device. 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] Example: Please see Figure 1-10 The present invention provides a technical solution: an automated polishing equipment for steel processing, including a base 1 and a body 2 fixed on the base 1. The body 2 is provided with a pressing and rotating device 3 and a polishing roller 4. A reciprocating moving mechanism 5 is provided on one side of the polishing roller 4. An opening and closing positioning mechanism 6 for clamping the end of the steel is connected to the reciprocating moving mechanism 5. An external clamping device 7 is also provided on the base 1 opposite to the opening and closing positioning mechanism 6. The machine body 2 is fixed on the upper surface of the base 1 and has an overall gantry structure, providing a stable installation base for the polishing roller 4 and the reciprocating moving mechanism 5. The extrusion rotation device 3 is installed on one side of the machine body 2, and its output end is connected to the polishing roller 4 for transmission, which can drive the polishing roller 4 to rotate at a constant speed. The polishing roller 4 adopts a multi-layer composite structure, with the outer layer being a wear-resistant fiber polishing wheel and the inner layer being an elastic rubber support layer, so that it can adapt to the slight undulations of the steel surface when under pressure, avoiding uneven polishing caused by rigid contact.

[0019] The reciprocating moving mechanism 5 includes a connecting cylinder 51, a connecting pipe 52 slidably sleeved in the connecting cylinder 51, and a U-shaped plate 53 fixed to the end of the connecting pipe 52. A pneumatic extrusion device 54 and an electric rotator 55 are installed on the U-shaped plate 53. The inner wall of the connecting cylinder 51 is provided with a linear guide rail, and the outer wall of the connecting pipe 52 is provided with a corresponding guide groove. The two slide together to ensure the straightness and stability of the movement. A U-shaped plate 53 is fixed at the end of the connecting pipe 52. The opening of the U-shaped plate 53 faces the polishing roller 4. The pneumatic extrusion device 54 is installed on the back of the U-shaped plate 53. Its piston rod passes through the U-shaped plate 53 and is connected to the mounting seat of the polishing roller 4. It can apply constant axial pressure during the polishing process. The electric rotator 55 is fixed on one side of the U-shaped plate 53, and its output shaft is perpendicular to the length direction of the steel.

[0020] The output end of the electric rotator 55 is connected to a Z-shaped rod 56. A slider 57 is slidably mounted on the Z-shaped rod 56. A nozzle 58 and a fan blade 59 are fixed on the slider 57. The Z-shaped rod 56 is composed of two parallel and staggered straight rods and a vertical connecting rod 513, forming an eccentric crank structure. The slider 57 is fitted onto the longer section of the Z-shaped rod 56 and can slide along that straight section. The nozzle 58 and the fan blade 59 are fixed on both sides of the slider 57. The nozzle 58 is connected to a coolant source through a hose, and the fan blade 59 is a small plastic impeller.

[0021] A connecting ring 510 is fitted on the outer side of the connecting pipe 52. A sleeve 511 is fixed on the connecting ring 510. A straight pipe 512 passes through the sleeve 511. One end of the straight pipe 512 is connected to the slider 57 through a connecting rod 513. The connecting ring 510 is fixedly fitted on the outer wall of the connecting pipe 52 and moves with the connecting pipe 52. The sleeve 511 is vertically fixed on the connecting ring 510, and its axis is perpendicular to the axis of the connecting pipe 52. The straight tube 512 is movably inserted inside the sleeve 511 and can slide freely along the axial direction of the sleeve 511. One end of the straight tube 512 is hinged to the slider 57 through the connecting rod 513. The two ends of the connecting rod 513 are rotatably connected to the slider 57 and the end of the straight tube 512 respectively, forming a linkage transmission. When the slider 57 moves, the connecting rod 513 pulls the straight tube 512 to reciprocate within the sleeve 511, thereby constraining the movement trajectory of the slider 57, making its swing amplitude more stable and controllable, and preventing the nozzle 58 from deviating from the polishing area due to excessive centrifugal force.

[0022] The other end of the straight tube 512 is fixed with a shaft 514, which is slidably engaged in the slotted plate 515. The slotted plate 515 is fixed relative to the U-shaped plate 53. When the connecting tube 52 drives the U-shaped plate 53 to move as a whole, the shaft 514 slides along the guide groove of the slotted plate 515, forcing the straight tube 512 to produce additional telescopic motion. Then, the instantaneous position of the slider 57 on the Z-shaped rod 56 is adjusted by the connecting rod 513, so that the swing trajectory of the nozzle 58 and the fan blade 59 matches the moving speed of the polishing roller 4, thereby achieving fixed-point enhanced cooling or wide-area uniform dust removal.

[0023] A support plate 516 is fixed on the slotted plate 515. The support plate 516 has a sliding groove 517 and a through groove 518. A rotating plate 519 is rotatably mounted in the sliding groove 517. A movable clamp 520 is hinged to the rotating plate 519. The movable clamp 520 is driven by a cylinder 521. The support plate 516 is fixedly connected to the side of the slotted plate 515, forming an integral frame with the slotted plate 515. The support plate 516 has a long strip-shaped sliding groove 517 and a through groove 518. The sliding groove 517 is used to install the rotating plate 519. The through groove 518 provides clearance for the movement of the movable clamp 520. The rotating plate 519 is mounted in the sliding groove 517 through a rotating shaft and can swing around the rotating shaft at a small angle. One end of the movable clamp 520 is hinged to the rotating plate 519, and the other end is a claw structure that is driven to open and close by a cylinder 521. The cylinder body of cylinder 521 is fixed on support plate 516, and the piston rod is hinged to the intermediate connecting rod of movable clamp 520.

[0024] The opening and closing positioning mechanism 6 includes a compression ring 61 and a pneumatic control device 62 for controlling the movement of the compression ring 61. The compression ring 61 is assembled from multiple opening and closing plates 63. Each opening and closing plate 63 has an annular groove 64 and a connecting groove 65 on its inner side. A piston plate 66 is slidably arranged in the connecting groove 65. A slide rod 67 is fixed on the piston plate 66. A spring 68 is sleeved on the slide rod 67. A limit block 69 is provided at the end of the slide rod 67. Each hinged plate 63 has an annular groove 64 and a connecting groove 65 on its inner side. The annular groove 64 is used to accommodate the flange or positioning step at the end of the steel. A piston plate 66 is slidably arranged in the connecting groove 65. One side of the piston plate 66 is an air chamber, and the other side is connected to a limiting block 69 through a slide rod 67. A spring 68 is sleeved on the slide rod 67 and is always in a pre-compressed state, pushing the piston plate 66 to return to the air chamber. When the steel is inserted into the extrusion ring 61, the end face of the steel first contacts the limiting block 69. The piston plate 66 compresses the air to generate buffer damping, and at the same time, the spring 68 provides the initial clamping force. If the steel vibrates axially, the piston plate 66 automatically adjusts its position to maintain a constant clamping force.

[0025] The external clamping device 7 is coaxially arranged with the opening and closing positioning mechanism 6, and the clamping center of the external clamping device 7 is coplanar with the grinding surface of the polishing roller 4. The external clamping device 7 and the opening and closing positioning mechanism 6 are arranged coaxially, and its clamping center is coplanar with the grinding surface of the polishing roller 4, ensuring that the surface of the steel to be polished is aligned with the grinding generatrix of the polishing roller 4 when the steel is clamped. The external clamping device 7 adopts a three-jaw self-centering chuck structure, and the chuck jaws are lined with rubber pads to prevent damage to the surface of the steel. The chuck is driven by a hydraulic motor, which can achieve rapid centering and clamping. It cooperates with the opening and closing positioning mechanism 6 to fix the two ends of the steel respectively, so as to avoid the steel from rotating circumferentially or moving axially during the polishing process.

[0026] This application also provides an automated polishing method for steel processing, comprising the following steps: S1: The two ends of the steel are clamped by the external clamping device 7 and the opening and closing positioning mechanism 6 respectively, and the surface of the steel to be polished is aligned with the polishing roller 4. S2: Start the extrusion rotation device 3 to drive the polishing roller 4 to rotate, and at the same time start the pneumatic extrusion device 54 to make the polishing roller 4 press against the steel surface; S3: Start the reciprocating moving mechanism 5 to drive the polishing roller 4 to move back and forth along the length of the steel, and drive the Z-shaped rod 56 by the electric rotary device 55 to make the nozzle 58 and fan blade 59 swing, so as to cool and remove dust from the polishing area. S4: During the polishing process, the piston plate 66 and spring 68 in the opening and closing positioning mechanism 6 adaptively adjust the clamping force to compensate for the vibration and displacement of the steel end. S5: After polishing, release the external clamping device 7 and the opening and closing positioning mechanism 6 in sequence to remove the steel.

[0027] Working principle: During operation, the relative distance between the external clamping device 7 and the opening and closing positioning mechanism 6 is first adjusted according to the length and diameter of the steel. One end of the steel is inserted into the extrusion ring 61 of the opening and closing positioning mechanism 6. The pneumatic control device 62 is activated to make each opening and closing plate 63 radially close. The end of the steel enters the ring groove 64. The limiting block 69 abuts against the end face of the steel under the action of the spring 68. The piston plate 66 compresses the air in the air chamber to form elastic support and complete the flexible clamping. The other end of the steel is clamped by the three-jaw self-centering chuck of the external clamping device 7 to ensure that the axis of the steel is parallel to the moving direction of the polishing roller 4 and the surface to be polished is aligned with the grinding area of ​​the polishing roller 4. Start the extrusion rotation device 3 to drive the polishing roller 4 to rotate at high speed. At the same time, start the pneumatic extrusion device 54. Its piston rod pushes the polishing roller 4 to press against the steel surface. The pressure can be precisely controlled by adjusting the air pressure value according to the steel material and polishing requirements. Since the polishing roller 4 has an elastic rubber layer inside, it can adapt to the small bumps and depressions on the steel surface under pressure, ensuring that the grinding pressure is evenly distributed. When the reciprocating moving mechanism 5 is started, the connecting pipe 52 reciprocates along the linear guide rail inside the connecting cylinder 51, driving the U-shaped plate 53 and the polishing roller 4 to move along the length of the steel. During the movement, the polishing roller 4 continuously rotates and presses the surface of the steel to achieve uniform polishing of the entire length of the steel. At the same time, the electric rotator 55 starts to rotate, and its output shaft drives the Z-shaped rod 56 to rotate. The slider 57 slides along the Z-shaped rod 56 and, through the linkage of the connecting rod 513, the straight pipe 512 and the shaft 514, and constrained by the guide groove of the slotted plate 515, the nozzle 58 and the fan blade 59 oscillate periodically. The coolant sprayed by the nozzle 58 directly acts on the polishing area to reduce frictional heat, while the airflow generated by the fan blade 59 blows away the grinding debris to prevent clogging of the polishing wheel pores. During the polishing process, the piston plate 66 and spring 68 in the opening and closing positioning mechanism 6 work together to monitor the axial force change at the end of the steel in real time. When the polishing roller 4 moves to the curved section or irregular cross section of the steel, the steel will produce a slight axial offset or radial vibration. At this time, the piston plate 66 automatically compresses or releases the air in the air chamber, and the spring 68 extends or shortens accordingly, so that the clamping force is always maintained within the set range. This prevents the steel from falling off and avoids surface damage caused by rigid extrusion. The external clamping device 7 maintains a constant clamping force and forms a double-end flexible constraint with the opening and closing positioning mechanism 6, which effectively suppresses the transmission of polishing vibration.

[0028] After polishing, first loosen the external clamping device 7, then use the pneumatic control device 62 to make the opening and closing plates 63 of the extrusion ring 61 open radially to release the end of the steel, and finally take out the steel to complete one work cycle.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] 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.

Claims

1. An automated polishing device for steel processing, comprising a base (1) and a body (2) fixed on the base (1), characterized in that: The machine body (2) is provided with a pressing and rotating device (3) and a polishing roller (4). A reciprocating moving mechanism (5) is provided on one side of the polishing roller (4). An opening and closing positioning mechanism (6) for clamping the end of the steel is connected to the reciprocating moving mechanism (5). An external clamping device (7) is also provided on the base (1) opposite to the opening and closing positioning mechanism (6).

2. The automated polishing equipment for steel processing according to claim 1, characterized in that: The reciprocating moving mechanism (5) includes a connecting cylinder (51), a connecting pipe (52) slidably sleeved in the connecting cylinder (51), and a U-shaped plate (53) fixed to the end of the connecting pipe (52). A pneumatic extrusion device (54) and an electric rotator (55) are installed on the U-shaped plate (53).

3. The automated polishing equipment for steel processing according to claim 2, characterized in that: The output end of the electric rotator (55) is connected to a Z-shaped rod (56), and a slider (57) is slidably arranged on the Z-shaped rod (56). A nozzle (58) and a fan blade (59) are fixed on the slider (57).

4. The automated polishing equipment for steel processing according to claim 3, characterized in that: A connecting ring (510) is sleeved on the outside of the connecting tube (52), and a sleeve (511) is fixed on the connecting ring (510). A straight tube (512) is inserted inside the sleeve (511), and one end of the straight tube (512) is connected to the slider (57) through a connecting rod (513).

5. The automated polishing equipment for steel processing according to claim 4, characterized in that: The other end of the straight tube (512) is fixed with a shaft (514), which is slidably engaged in the slotted plate (515), and the slotted plate (515) is fixed relative to the U-shaped plate (53).

6. The automated polishing equipment for steel processing according to claim 5, characterized in that: A support plate (516) is fixed on the slotted plate (515). The support plate (516) has a sliding groove (517) and a through groove (518). A rotating plate (519) is rotatably arranged in the sliding groove (517). A movable clamp (520) is hinged on the rotating plate (519). The movable clamp (520) is driven by a cylinder (521).

7. The automated polishing equipment for steel processing according to claim 6, characterized in that: The opening and closing positioning mechanism (6) includes a compression ring (61) and a pneumatic control device (62) for controlling the movement of the compression ring (61). The compression ring (61) is composed of multiple opening and closing plates (63). Each opening and closing plate (63) has an annular groove (64) and a connecting groove (65) on its inner side. A piston plate (66) is slidably arranged in the connecting groove (65). A slide rod (67) is fixed on the piston plate (66). A spring (68) is sleeved on the slide rod (67). A limit block (69) is provided at the end of the slide rod (67).

8. The automated polishing equipment for steel processing according to claim 7, characterized in that: The external clamping device (7) is coaxially arranged with the opening and closing positioning mechanism (6), and the clamping center of the external clamping device (7) is coplanar with the polishing surface of the polishing roller (4).

9. An automated polishing method for steel processing, applicable to the automated polishing equipment for steel processing as described in claim 8, characterized in that, Includes the following steps: S1: The two ends of the steel are clamped by the external clamping device (7) and the opening and closing positioning mechanism (6) respectively, and the surface of the steel to be polished is aligned with the polishing roller (4). S2: Start the extrusion rotation device (3) to drive the polishing roller (4) to rotate, and at the same time start the pneumatic extrusion device (54) to make the polishing roller (4) press the steel surface; S3: Start the reciprocating moving mechanism (5) to drive the polishing roller (4) to move back and forth along the length of the steel, and drive the Z-shaped rod (56) to make the nozzle (58) and fan blade (59) swing to cool and remove dust from the polishing area by the electric rotary device (55). S4: During the polishing process, the piston plate (66) and spring (68) in the opening and closing positioning mechanism (6) adaptively adjust the clamping force to compensate for the vibration and offset of the steel end; S5: After polishing, release the external clamping device (7) and the opening and closing positioning mechanism (6) in sequence to remove the steel.

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