Steel structure polishing device

Abstract

The utility model discloses a steel structure polishing device, which relates to the technical field of steel structure polishing and comprises a base, an adjusting mechanism is fixedly connected to the middle of the inner side of the base, and a clamping mechanism is mounted at the top of the adjusting mechanism. By the adoption of the structure, the polishing process can be greatly optimized due to the arrangement of the polishing mechanism, during polishing operation, a fourth motor drives a second lead screw, a sliding block drives a polishing grinding wheel to transversely move, a second electric push rod pushes the grinding wheel to make contact with a steel plate, a fifth motor drives the grinding wheel to rotate at a high speed, and the top of the steel plate is comprehensively polished; and when the other face needs to be polished, the second motor is started, the clamping frame is directly driven to rotate, the clamped steel plate is driven to turn over, through the design, manual dismantling and turning over are not needed, and double-face polishing of the steel plate is efficiently completed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to steel structure polishing technical field, especially relate to a steel structure polishing device. BACKGROUND

[0002] In modern architecture, mechanical manufacturing and many other industries, steel structure has been widely used due to its high strength, good toughness and processability, and steel structure polishing, as an important part of steel structure processing, plays a decisive role in the quality and performance of steel structure.

[0003] Steel structure polishing is a process operation of using polishing tools to process the surface of steel structure parts. Through this process, burrs, welding slag, rust, oil stains and other impurities on the surface of steel structure can be effectively removed, and the surface can achieve a certain flatness and smoothness. In this way, not only the appearance quality of steel structure can be significantly improved, but more importantly, the adhesion of the coating and the surface of the steel structure can be greatly enhanced, effectively improving the corrosion resistance of the steel structure and prolonging its service life. At the same time, the polishing process helps to accurately check whether there are cracks, sand holes and other defects on the surface of the steel structure, so that timely detection and repair can be carried out to ensure the overall quality and safety of the steel structure.

[0004] With the continuous development of technology, various steel structure polishing devices have emerged in the market, such as the steel structure polishing device disclosed in Chinese patent No. CN220718763U. The device is provided with two L-shaped plates that can move closer or farther apart on the bearing box, which can fix different lengths of steel structure. The V-shaped carrier plate and two upward and downward movable anti-skid pressing heads are equipped on the L-shaped plate, which can clamp and fix circular steel structures and square steel structures with different diameters. The device has simple structure and is convenient for operators to operate, which improves the practicality of the polishing equipment to a certain extent. However, through actual application test, the device has obvious limitations. In actual operation, it can only polish one side of the steel structure. When the other side needs to be polished, the steel structure plate to be polished must be taken out, turned over and then placed in the clamping device again. This operation process is very tedious and time-consuming, which seriously affects the polishing efficiency and makes it difficult to meet the efficient and rapid processing requirements in actual production. UTILITY MODEL CONTENTS

[0005] In view of the problems mentioned in the background art, the purpose of the utility model is to provide a steel structure polishing device to solve the problem that the existing technology cannot automatically turn over and is not convenient for polishing the other side during application.

[0006] The above technical purpose of the utility model is realized by the following technical scheme:

[0007] The utility model provides a steel structure polishing device, including the base, the inside middle part of base is fixedly connected with adjusting mechanism, the top of adjusting mechanism is installed with clamping mechanism, one side middle part of base is fixedly installed with support arm, the top of support arm is fixedly connected with polishing mechanism, polishing mechanism sets up the just above of clamping mechanism, the inside clamping of clamping mechanism is installed with the steel sheet to be processed,

[0008] Adjusting mechanism includes guide rail, the middle part of base is fixedly connected with guide rail, the inside rotation of guide rail is connected with first screw rod, the both ends of first screw rod are opposite in screw thread, the both ends of first screw rod are all screwdly connected with movable block, the top of movable block is connected with the bottom of clamping mechanism, one side of base is fixedly connected with first motor, and the output of first motor is connected with one end of first screw rod.

[0009] As a preferred technical scheme, the mounting hole is provided at the four corners of the base, and the mounting hole is a counterbore.

[0010] As a preferred technical scheme, the clamping mechanism includes a vertical plate, the vertical plate is fixedly connected to the top of the movable block, the top of the vertical plate is fixedly installed with a fixed seat, the inner side of the fixed seat is rotatably connected with a clamping frame, the inside of the clamping frame is provided with a driving assembly, the outer side of one fixed seat is fixedly connected with a second motor, the output end of the second motor is connected with the outer side of one clamping frame, and the steel plate to be processed is movably connected to the inside of the clamping frame.

[0011] As a preferred technical scheme, the driving assembly includes a worm gear, a guide roller and a third motor, the worm gear is rotatably connected to the bottom of the clamping frame near the second motor side at equal intervals, the guide rollers are linearly arranged and rotatably connected to the inside of the clamping frame at equal intervals, the third motor is fixedly connected to the lower end of one side of the clamping frame, the output end of the third motor is fixedly connected with a worm, the worm is in transmission connection with the worm gear, and the bottom of the guide roller is connected with the top of the worm gear.

[0012] As a preferred technical scheme, the top of the clamping frame is fixedly connected with a first electric push rod, the output end of the first electric push rod is fixedly connected with a top plate penetrating through the clamping frame, the bottom of the top plate is rotatably connected with a plurality of ball bearings at equal intervals, and the bottom of the clamping frame is also rotatably connected with a plurality of ball bearings at equal intervals.

[0013] As a preferred technical scheme, the polishing mechanism comprises a top rail, the top rail is fixedly connected to the top of the support arm, one end of the top rail away from the support arm is fixedly connected with a fourth motor, the output end of the fourth motor is fixedly connected with a second screw rod penetrating through the top rail, the outer surface of the second screw rod is threadedly connected with a sliding block, the sliding block is slidingly connected to the inside of the top rail, the top of the sliding block is fixedly connected with a second electric push rod, the output end of the second electric push rod is fixedly connected with a sleeve frame penetrating through the movable block, the inside of the sleeve frame is fixedly connected with a fifth motor, and the output end of the fifth motor is fixedly connected with a polishing grinding wheel.

[0014] As a preferred technical scheme, the side surface shape of the movable block is in a cross shape, and the overall cross-sectional shape of the inside cavity of the guide rail is also in a convex shape.

[0015] In summary, the utility model mainly has the following beneficial effects:

[0016] Firstly, the adjusting mechanism and the clamping mechanism are innovated in cooperation, so that the processing efficiency and adaptability are effectively improved; the adjusting mechanism starts the first motor, the first screw rods with opposite thread directions at two ends are utilized to drive the movable block to accurately reciprocate in the guide rail, the clamping mechanism is driven to displace, the clamping frame is self-adaptively adjusted, different sizes of steel plates to be processed are firmly clamped, in the clamping mechanism, after the movable block drives the clamping frame to move to the position, the steel plate is placed between the two clamping frames, the two sides of the steel plate are attached to the guide rollers and the bottom is attached to the ball, the first electric push rod is started to complete clamping positioning, different thicknesses of steel plates are adapted, after positioning is completed, the third motor drives the guide roller to rotate, transverse displacement of the steel plate is realized, continuous polishing is facilitated, and processing efficiency is improved in all directions;

[0017] Secondly, the setting of the polishing mechanism can greatly optimize the polishing process; during polishing operation, the fourth motor drives the second screw rod, the sliding block drives the polishing grinding wheel to displace transversely, the second electric push rod pushes the grinding wheel to contact the steel plate, the fifth motor drives the grinding wheel to rotate at high speed, the top of the steel plate is polished comprehensively, simultaneously, the driving assembly and the fourth motor are cooperated to realize transverse and longitudinal composite displacement of the polishing grinding wheel on the top of the steel plate, when the other side needs to be polished, the second motor is started to directly drive the clamping frame to rotate, the clamped steel plate is turned over, this design does not need manual dismounting and turning over, double-sided polishing of the steel plate is efficiently completed, and a convenient, efficient and high-quality solution is provided for the steel structure processing industry. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 It is the overall structure schematic diagram of the utility model;

[0019] Fig. 2 It is the rear view structure schematic diagram of the utility model;

[0020] Fig. 3It is the perspective structure schematic diagram of the utility model;

[0021] Fig. 4 It is the clamping mechanism structure schematic diagram of the utility model.

[0022] Fig. 1, base; 2, adjusting mechanism; 21, guide rail; 22, first screw rod; 23, movable block; 24, first motor; 3, clamping mechanism; 31, vertical plate; 32, fixed seat; 33, clamping frame; 34, driving assembly; 341, worm gear; 342, guide roller; 343, third motor; 344, worm; 345, first electric push rod; 346, top plate; 347, ball; 35, second motor; 4, support arm; 5, polishing mechanism; 51, top rail; 52, fourth motor; 53, second screw rod; 54, sliding block; 55, second electric push rod; 56, sleeve frame; 57, fifth motor; 58, polishing grinding wheel; 6, steel plate to be processed; 7, mounting hole. DETAILED DESCRIPTION

[0023] EMBODIMENT

[0024] REFERENCE Figs. 1-4 The steel structure polishing device of the embodiment, including base 1, the inner side middle part of base 1 is fixedly connected with adjusting mechanism 2, the top of adjusting mechanism 2 is installed with clamping mechanism 3, the middle part of one side of base 1 is fixedly installed with support arm 4, the top of support arm 4 is fixedly connected with polishing mechanism 5, and polishing mechanism 5 is arranged directly above clamping mechanism 3, and the inner side of clamping mechanism 3 is clamped and installed with steel plate 6 to be processed;

[0025] Adjusting mechanism 2 includes guide rail 21, and guide rail 21 is fixedly connected to the middle part of base 1, and first screw rod 22 is rotatably connected inside guide rail 21, and the screw thread rotation directions of the two ends of first screw rod 22 are opposite, and the two ends of first screw rod 22 are both screw-connected with movable block 23, the top of movable block 23 is connected with the bottom of clamping mechanism 3, one side of base 1 is fixedly connected with first motor 24, and the output end of first motor 24 is connected with one end of first screw rod 22, during use of the device, when the device is started, the first motor 24 fixedly connected to one side of base 1 starts to operate, the output end of first motor 24 drives first screw rod 22 to rotate, since the screw thread rotation directions of the two ends of first screw rod 22 are opposite, during rotation, the movable block 23 screw-connected at the two ends will accurately reciprocate along the opposite directions inside guide rail 21, guide rail 21 is fixed in the middle part of base 1, and stable track is provided for the sliding of movable block 23, the top of movable block 23 is connected with the bottom of clamping mechanism 3, along with the displacement of movable block 23, clamping mechanism 3 can be driven to move synchronously, in this way, by adjusting the operation of first motor 24, the position of clamping mechanism 3 can be flexibly controlled, so that the steel plate 6 to be processed of different sizes can be adapted, and stable clamping is realized, which lays a foundation for subsequent polishing processing procedures.

[0026] Reference Figs. 1-2 The mounting holes 7 are provided at four corners of the base 1, and the mounting holes 7 are provided as counter-sunk holes. By providing the mounting holes 7, the base 1 can be stably fixed on a work platform or other mounting surface through counter-sunk bolts passing through the mounting holes 7 during installation of the device. The counter-sunk hole design can make the head of the bolt sink into the hole and flush with the surface of the base 1. In this way, the firmness of the device installation is ensured, and potential safety hazards such as collision and scratching caused by the protruding bolt head are avoided. At the same time, the appearance of the entire device is more flat and beautiful. Moreover, this installation method facilitates quick installation and disassembly of the device in different scenarios, facilitates transportation, maintenance and flexible adjustment of the installation position according to actual processing needs, and provides a basic guarantee for efficient and stable operation of the steel structure polishing device.

[0027] Reference Figs. 3-4The clamping mechanism 3 comprises a vertical plate 31 fixedly connected to the top of the movable block 23, a fixed seat 32 fixedly installed on the top of the vertical plate 31, a clamping frame 33 rotatably connected to the inner side of the fixed seat 32, a driving assembly 34 arranged in the clamping frame 33, a second motor 35 fixedly connected to the outer side of one of the fixed seats 32, the output end of the second motor 35 connected to the outer side of one of the clamping frames 33, the steel plate 6 to be machined movably connected to the inside of the clamping frame 33, the driving assembly 34 comprising a worm gear 341, a guide roller 342 and a third motor 343, the worm gear 341 equidistantly rotatably connected to the bottom of the clamping frame 33 near the second motor 35, the guide rollers 342 equidistantly and linearly rotatably connected to the inside of the clamping frame 33, the third motor 343 fixedly connected to the lower end of one side of the clamping frame 33, the output end of the third motor 343 fixedly connected with a worm shaft 344, the worm shaft 344 drivingly connected with the worm gear 341, the bottom of the guide roller 342 connected with the top of the worm gear 341, the top of the clamping frame 33 fixedly connected with a first electric push rod 345, the output end of the first electric push rod 345 penetrating through the clamping frame 33 fixedly connected with a top plate 346, the bottom of the top plate 346 equidistantly rotatably connected with a ball 347, and the bottom of the clamping frame 33 also equidistantly rotatably connected with the ball 347, when the movable block 23 in the adjusting mechanism 2 moves, the vertical plate 31 fixedly connected to the top is displaced, thereby adjusting the position of the whole clamping mechanism 3, the clamping frame 33 rotatably connected to the inner side of the fixed seat 32 of the vertical plate 31 can be driven to rotate by the second motor 35 outside the fixed seat 32, realizing the turning operation of the steel plate 6 to be machined, the driving assembly 34 in the clamping frame 33 is composed of the worm gear 341, the guide roller 342 and the third motor 343, when the third motor 343 operates, the worm shaft 344 at the output end of the third motor 343 drives the worm gear 341 drivingly connected thereto to rotate, since the bottom of the guide roller 342 is connected with the top of the worm gear 341, the rotation of the worm gear 341 can synchronously drive the guide roller 342 to rotate, making the steel plate 6 to be machined in the clamping frame 33 produce transverse displacement, when the steel plate 6 to be machined is fixed, the first electric push rod 345 at the top of the clamping frame 33 is started, the output end of the first electric push rod 345 pushes the top plate 346 to move downward, the ball 347 rotatably connected to the bottom of the top plate 346 and the bottom of the clamping frame 33 can reduce the friction when the steel plate moves, on the other hand, in the process of the top plate 346 moving downward, it can better fit the steel plate 6 to be machined of different thicknesses, realizing stable clamping and ensuring the stability of the steel plate in the polishing process.

[0028] Reference Figs. 1-2The polishing mechanism 5 comprises a top rail 51 fixedly connected to the top of the support arm 4, one end of the top rail 51 away from the support arm 4 is fixedly connected with a fourth motor 52, the output end of the fourth motor 52 is fixedly connected with a second lead screw 53 penetrating through the top rail 51, the outer surface of the second lead screw 53 is threadedly connected with a sliding block 54, the sliding block 54 is slidingly connected to the inside of the top rail 51, the top of the sliding block 54 is fixedly connected with a second electric push rod 55, the output end of the second electric push rod 55 is fixedly connected with a sleeve frame 56 penetrating through the movable block 23, the inside of the sleeve frame 56 is fixedly connected with a fifth motor 57, the output end of the fifth motor 57 is fixedly connected with a polishing grinding wheel 58, the side surface of the movable block 23 is in the shape of a cross, the overall cross-sectional shape of the internal cavity of the guide rail 21 is also in the shape of a convex letter, the outer corners of the support arm 4, the base 1, the top rail 51 and the guide rail 21 are all set in the shape of a circular arc, when polishing, the fourth motor 52 at one end of the top rail 51 fixedly connected to the top of the support arm 4 is started to operate, the output end of the fourth motor 52 drives the second lead screw 53 penetrating through the top rail 51 to rotate, since the outer surface of the second lead screw 53 is threadedly connected with the sliding block 54 and the sliding block 54 slides in the top rail 51, the rotation of the second lead screw 53 drives the sliding block 54 to accurately displace in the top rail 51, the second electric push rod 55 fixed to the top of the sliding block 54 can adjust the extension length of itself according to the height of the steel plate 6 to be machined, the output end of the second electric push rod 55 penetrates through the movable block 23 and is connected with the sleeve frame 56, and pushes the sleeve frame 56 to move up and down, when the sleeve frame 56 moves downward to the appropriate position, the fifth motor 57 fixed in the sleeve frame 56 is started to operate, the polishing grinding wheel 58 at the output end of the fifth motor 57 rotates at high speed to polish the steel plate 6 to be machined, the side surface of the movable block 23 is in the shape of a cross, which is matched with the convex letter-shaped cavity in the guide rail 21 to ensure the stability of the sliding of the movable block 23 in the guide rail 21, in addition, the outer corners of the support arm 4, the base 1, the top rail 51 and the guide rail 21 are all set in the shape of a circular arc, which not only can prevent the personnel from being scratched by sharp corners during the operation, but also can avoid the damage of the device due to collision during the carrying or use, thereby ensuring the safety and durability of the device.

[0029] Principle and advantages: the present application carefully sets the adjusting mechanism 2, effectively improves the adaptability and convenience of the device in the processing process, in the device running stage, start the first motor 24, the power generated by the operation of the first motor 24 drives the first screw rod 22 to rotate, because the screw thread direction of the two ends of the first screw rod 22 is opposite, its rotation can synchronously promote the precise reciprocating sliding of the movable block 23 in the guide rail 21, the reciprocating sliding of the movable block 23 further drives the synchronous displacement of the clamping mechanism 3 on the top of the movable block 23, by adjusting the displacement of the clamping mechanism 3, the stable clamping of the different size steel plate 6 to be processed can be realized, specifically, the clamping mechanism 3 in the card frame 33 reciprocates with the displacement of the movable block 23, which can be self-adapted according to the actual size of the steel plate 6 to be processed, so as to realize the firm clamping and accurate positioning of the steel plate 6 to be processed of different specifications, this design makes the device can flexibly cope with steel plates of various sizes in actual use, and shows excellent adaptability, effectively meets the diversified processing needs.

[0030] The clamping mechanism 3 provided by the present application provides an efficient solution for positioning and displacement adjustment of the steel plate 6 to be processed, when the movable block 23 drives the card frame 33 on the top of the vertical plate 31 to move reciprocally, the operator can conveniently place the steel plate 6 to be processed between the two card frames 33, at this time, the two sides of the steel plate are closely fitted with the inner side of the guide roller 342, and the bottom of the steel plate is in good contact with the ball 347 in the inner bottom of the card frame 33, then, the first electric push rod 345 is started, the telescopic action of the first electric push rod 345 drives the top plate 346 to move downward, thereby stably clamping and positioning the steel plate 6 to be processed, this design can flexibly adapt to steel plates 6 to be processed of different thicknesses, and significantly improves the adaptability of the device, after completing the clamping and positioning, the third motor 343 is started, the third motor 343 is rotated to drive the worm 344 to rotate, the rotation of the worm 344 drives the worm wheel 341 to rotate synchronously, the rotation of the worm wheel 341 further promotes the guide roller 342 in the card frame 33 to rotate, with the rotation of the guide roller 342 on one side of the steel plate 6 to be processed, the steel plate produces transverse displacement in the card frame 33, realizing the flexible adjustment of the position of the steel plate 6 to be processed, this function not only helps to maintain good polishing effect, but also enables the steel plate 6 to be processed to automatically displace transversely, creating favorable conditions for rapid filling of the steel plate 6 to be processed for continuous polishing processing, effectively improving the processing efficiency.

[0031] The polishing mechanism 5 of the present application has an excellent innovative design, effectively optimizing the polishing process of the steel plate 6 to be processed, significantly improving the processing efficiency. During the polishing operation, the fourth motor 52 is started, the fourth motor 52 is driven to rotate the second screw rod 53, the rotation of the second screw rod 53 is converted into the precise displacement of the sliding block 54 inside the top rail 51, and then drives the polishing grinding wheel 58 to realize transverse displacement. In this process, the second electric push rod 55 is started, the second electric push rod 55 pushes the sleeve frame 56 to move downward, so that the polishing grinding wheel 58 at the bottom of the fifth motor 57 is in close contact with the top of the steel plate 6 to be processed. Then, the fifth motor 57 is started, the fifth motor 57 drives the polishing grinding wheel 58 to rotate at high speed, and the top of the steel plate 6 to be processed is polished comprehensively and efficiently. During the polishing process, the driving assembly 34 of the device works synchronously to drive the steel plate 6 to be processed to move transversely. At the same time, the fourth motor 52 drives the fifth motor 57 to move the polishing grinding wheel 58 transversely through the cooperation of the second screw rod 53 and the sliding block 54, so that the polishing grinding wheel 58 can realize transverse and longitudinal composite displacement on the top of the steel plate 6 to be processed during the rotation and polishing process, thereby realizing the all-round polishing of the top of the steel plate. When the other side of the steel plate needs to be polished, the second motor 35 is started, the second motor 35 directly drives the clamping frame 33 to rotate, and the other clamping frame 33 rotates synchronously inside the vertical plate 31. Through the driving of the second motor 35, the clamping frame 33 can drive the steel plate 6 to be processed clamped inside to flip. This design not only enables the device to flexibly clamp steel plates 6 of different sizes, but also enables the device to polish the top and bottom of the steel plate comprehensively. The whole process does not need to manually disassemble and flip the steel plate, effectively improving the polishing processing efficiency of the steel plate 6 to be processed, and providing an efficient and convenient solution for the steel structure processing industry.

Claims

1. A steel structure polishing device comprising a base (1), characterized in that: The middle part of the inner side of the base (1) is fixedly connected with an adjusting mechanism (2), the top of the adjusting mechanism (2) is provided with a clamping mechanism (3), the middle part of one side of the base (1) is fixedly provided with a supporting arm (4), the top of the supporting arm (4) is fixedly connected with a polishing mechanism (5), the polishing mechanism (5) is arranged directly above the clamping mechanism (3), and the inner side of the clamping mechanism (3) is clamped and provided with a steel plate (6) to be machined; The adjusting mechanism (2) comprises a guide rail (21), the guide rail (21) is fixedly connected to the middle part of the base (1), the inside of the guide rail (21) is rotatably connected with a first lead screw (22), the two ends of the first lead screw (22) are oppositely threaded, and the two ends of the first lead screw (22) are both threadedly connected with a movable block (23); the top of the movable block (23) is connected with the bottom of the clamping mechanism (3), and one side of the base (1) is fixedly connected with a first motor (24); and the output end of the first motor (24) is connected with one end of the first lead screw (22).

2. A steel structure polishing apparatus according to claim 1, characterized in that: Mounting holes (7) are formed at the four corners of the base (1), and the mounting holes (7) are arranged as counter-sunk holes.

3. A steel structure polishing apparatus according to claim 1, characterized in that: The clamping mechanism (3) comprises a vertical plate (31), the vertical plate (31) is fixedly connected to the top of the movable block (23), the top of the vertical plate (31) is fixedly provided with a fixed seat (32), the inner side of the fixed seat (32) is rotatably connected with a clamping frame (33), the inside of the clamping frame (33) is provided with a driving assembly (34), the outer side of one fixed seat (32) is fixedly connected with a second motor (35), the output end of the second motor (35) is connected with the outer side of one clamping frame (33), and the steel plate (6) to be machined is movably connected to the inside of the clamping frame (33).

4. A steel structure polishing apparatus according to claim 3, characterized in that: The driving assembly (34) comprises a worm wheel (341), a guide roller (342) and a third motor (343), the worm wheel (341) is rotatably connected to the bottom of the clamping frame (33) near the second motor (35) at equal intervals, the guide rollers (342) are linearly arranged and rotatably connected to the inside of the clamping frame (33) at equal intervals, the third motor (343) is fixedly connected to the lower end of one side of the clamping frame (33), the output end of the third motor (343) is fixedly connected with a worm (344), the worm (344) and the worm wheel (341) are in transmission connection, and the bottom of the guide roller (342) is connected with the top of the worm wheel (341).

5. A steel structure polishing apparatus according to claim 4, characterized in that: The top of the clamping frame (33) is fixedly connected with a first electric push rod (345), the output end of the first electric push rod (345) penetrates through the clamping frame (33) and is fixedly connected with a top plate (346), the bottom of the top plate (346) is rotatably connected with a plurality of ball bearings (347) at equal intervals, and the bottom of the clamping frame (33) is also rotatably connected with a plurality of ball bearings (347) at equal intervals.

6. A steel structure polishing apparatus according to claim 1, characterized in that: The polishing mechanism (5) comprises a top rail (51) fixedly connected to the top of the support arm (4), one end of the top rail (51) away from the support arm (4) is fixedly connected with a fourth motor (52), the output end of the fourth motor (52) is fixedly connected with a second lead screw (53) penetrating through the top rail (51), the outer surface of the second lead screw (53) is threadedly connected with a sliding block (54), the sliding block (54) is slidingly connected to the inside of the top rail (51), the top of the sliding block (54) is fixedly connected with a second electric push rod (55), the output end of the second electric push rod (55) is fixedly connected with a sleeve frame (56) penetrating through the movable block (23), the inside of the sleeve frame (56) is fixedly connected with a fifth motor (57), the output end of the fifth motor (57) is fixedly connected with a polishing grinding wheel (58).

7. A steel structure polishing apparatus according to claim 5, characterized in that: The side surface shape of the movable block (23) is cross-shaped, the overall cross-sectional shape of the internal cavity of the guide rail (21) is also arranged as a convex letter shape, and the outer corners of the support arm (4), the base (1), the top rail (51) and the guide rail (21) are all arranged as arc shapes.

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