Round steel surface grinding device and using method thereof

Abstract

The invention discloses a round steel surface grinding device and a using method thereof, and relates to the technical field of pipe interior grinding. A round steel surface coping device comprises a coping table, a sliding groove is formed in the top of the coping table, a round steel clamping structure is arranged above the coping table, a coping adjusting structure is located on the coping table, and the coping adjusting structure comprises a first motor, a first threaded rod, a moving plate, a fixing frame, a second motor and a rotating cylinder. Through cooperation of a rotating cylinder, a second threaded rod, a rotating frame, second connecting rods, a polishing plate and a rotating seat, the second threaded rod can drive the rotating frame to horizontally move under the guidance of four second connecting rods on the rotating frame, so that the rotating frame can expand and move outwards under rotation cooperation of the second connecting rods at the two ends of the polishing plate; and therefore, the four grinding plates can be conveniently attached to the inner wall of the round steel, the four grinding plates can grind the interior of the round steel, then the grinding tool can adapt to the round steel with different diameters, and the practicability of the grinding tool is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of internal pipe grinding, and particularly relates to a round steel surface grinding device and a using method thereof. Background Art

[0002] In the metal processing industry, the surface quality of round steel directly affects its subsequent applications and processing effects. Round steel is a metal material widely used in industrial fields such as construction, machinery, automobiles, and ships. Its cross-sectional shape is a simple circular cross-section and is delivered in a straight bar manner.

[0003] Most traditional round steel surface grinding devices use grinding tools with fixed sizes. When dealing with round steel of different diameters, such devices have obvious limitations. Since the grinding tools cannot be adjusted according to the internal diameter of the round steel, during the grinding process, it is often necessary to replace grinding tools of different sizes multiple times to adapt to round steel of different diameters. This not only increases the operation difficulty but also reduces the work efficiency. Therefore, we propose a round steel surface grinding device and a using method thereof. Summary of the Invention

[0004] An object of the present invention is to solve at least one of the technical problems existing in the prior art, and provide a round steel surface grinding device and a using method thereof, which can solve the problem that most traditional round steel surface grinding devices use grinding tools with fixed sizes. When dealing with round steel of different diameters, such devices have obvious limitations. Since the grinding tools cannot be adjusted according to the internal diameter of the round steel, during the grinding process, it is often necessary to replace grinding tools of different sizes multiple times to adapt to round steel of different diameters. This not only increases the operation difficulty but also reduces the work efficiency.

[0005] To achieve the above object, the present invention provides the following technical solution: A round steel surface grinding device, comprising:

[0006] A grinding table, on the top of which a sliding groove is provided, and a round steel clamping structure is arranged above the grinding table;

[0007] A grinding adjustment structure, which is located on the grinding table;

[0008] The grinding adjustment structure includes a first motor, a first threaded rod, a moving plate, a fixing frame, a second motor and a rotating cylinder. The first threaded rod is rotatably connected inside the sliding groove. The first motor is fixedly installed on one side of the grinding table. The output end of the first motor rotatably extends into the sliding groove and is fixedly connected to the first threaded rod. The moving plate is threadedly sleeved on the outer surface of the first threaded rod. The moving plate is slidably connected inside the sliding groove. The fixing frame is fixedly connected to the top of the moving plate. The second motor is fixedly installed on one side of the fixing frame. The output end of the second motor rotatably penetrates the fixing frame and is fixedly connected to the rotating cylinder. Four limiting sliding grooves are formed on the outer surface of the rotating cylinder.

[0009] Preferably, the grinding adjustment structure further includes four rotating seats, four grinding plates, a rotating frame, a rotating motor and a second threaded rod. The rotating motor is fixedly installed inside the rotating cylinder. The output end of the rotating motor is fixedly connected to the second threaded rod. The second threaded rod is rotatably connected inside the rotating cylinder. The rotating frame is threadedly sleeved on the outer surface of the second threaded rod. The four rotating seats are all fixedly connected to the outer surface of the rotating cylinder. A second connecting rod is rotatably connected inside each of the four rotating seats. One end of each of the four second connecting rods away from the corresponding rotating seat is rotatably connected to the corresponding grinding plate. Four same second connecting rods are rotatably connected inside the rotating frame. One end of each of the four second connecting rods close to the rotating motor away from the rotating frame is rotatably connected to the corresponding grinding plate. The four second connecting rods close to the rotating motor are all located inside the corresponding limiting sliding grooves.

[0010] Preferably, the round steel clamping structure includes a round steel mounting frame, an external gear ring, an internal gear ring, a first gear and a driving motor. The round steel mounting frame is fixedly connected to the top of the grinding table. The internal gear ring is rotatably connected to the side of the round steel mounting frame away from the first motor. The external gear ring is fixedly sleeved on the outer surface of the internal gear ring. The driving motor is fixedly installed on the outer surface of the round steel mounting frame. The output end of the driving motor is fixedly connected to the first gear. The first gear is meshed with the external gear ring. A clamping assembly is arranged inside the round steel mounting frame.

[0011] Preferably, the clamping assembly includes two fixing plates, two moving seats, two first connecting rods, a clamping plate, a second gear and a bidirectional threaded rod. The two fixing plates are both fixedly connected to the inner wall of the round steel mounting frame. The bidirectional threaded rod is rotatably connected inside the opposite surfaces of the two fixing plates. The two moving seats are both threadedly sleeved on the outer surface of the bidirectional threaded rod. The two moving seats are both slidably connected to the inner wall of the round steel mounting frame. The two first connecting rods are both rotatably connected inside the corresponding moving seats. One end of each of the two first connecting rods away from the corresponding moving seat is rotatably connected to the clamping plate. One end of the bidirectional threaded rod rotatably penetrates the corresponding fixing plate and is fixedly connected to the second gear. The second gear is meshed with the internal gear ring.

[0012] Preferably, the number of the clamping assemblies is four, the four clamping assemblies are arranged in a circular array inside the round steel mounting frame, and the four second gears are all meshed with the internal gear ring.

[0013] Preferably, an electric push rod is fixedly installed on the top of the grinding table, and the telescopic end of the electric push rod is fixedly connected with a support plate.

[0014] A usage method of a round steel surface grinding device includes:

[0015] S1: Connect the electric push rod and the drive motor to an external power supply and start them.

[0016] S2: The drive motor drives the first gear to rotate. The first gear drives the internal gear ring to rotate through the external gear ring. The rotation of the internal gear ring drives the four second gears to rotate. The rotation of the four second gears drives the corresponding bidirectional threaded rods to rotate. The rotation of the four bidirectional threaded rods drives the two moving seats thereon to move in opposite directions under the guidance of the inner wall of the round steel mounting frame. The movement of the two moving seats on the bidirectional threaded rod drives the first connecting rod thereon to move and rotate, so as to drive the four clamping plates to clamp and fix the round steel.

[0017] S3: The electric push rod drives the support plate to move upward, so that the support plate can contact the surface of the round steel, and the support plate can support the round steel.

[0018] S4: Connect the first motor, the second motor and the rotation motor to an external power supply and start them.

[0019] S5: The first motor drives the first threaded rod to rotate. The rotation of the first threaded rod drives the moving plate to move horizontally under the guidance of the sliding groove. The movement of the moving plate drives the rotating cylinder thereon to insert into the round steel.

[0020] S6: The rotation motor drives the second threaded rod to rotate. The rotation of the second threaded rod drives the rotating frame to move horizontally under the guidance of the four second connecting rods thereon, so that the rotating frame can move away from the rotation motor, so as to drive the four second connecting rods thereon to move and rotate. The movement of the four second connecting rods on the rotating frame drives the four grinding plates to move under the cooperation of rotating the second connecting rods in the four rotating seats, so that the four grinding plates can expand outwards, so as to facilitate the four grinding plates to fit against the inner wall of the round steel.

[0021] S7: The second motor drives the rotating cylinder to rotate, so as to facilitate the four grinding plates to grind and repair the inner wall of the round steel. Thus, the first threaded rod can slowly drive the moving plate to move, so as to facilitate the four grinding plates to grind the inside of the round steel.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] 1. For this round steel surface grinding device, through the cooperation of the rotating cylinder, the second threaded rod, the rotating frame, the second connecting rod, the grinding plate and the rotating seat, the second threaded rod drives the rotating frame to move horizontally under the guidance of the four second connecting rods thereon. Thus, under the rotational cooperation of the second connecting rods at both ends of the grinding plate, it can move outwards and expand, facilitating the four grinding plates to fit the inner wall of the round steel, enabling the four grinding plates to grind the inside of the round steel, and further facilitating adaptation to round steel with different diameters, thereby further improving the practicality of this grinding tool.

[0024] 2. For this round steel surface grinding device, through the cooperation of the electric push rod and the support plate, the electric push rod drives the support plate to move upwards, facilitating the support plate to contact the surface of the round steel, enabling the support plate to support the round steel, and thus improving the stability of the round steel during grinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below in conjunction with the drawings and embodiments:

[0026] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0027] Figure 2 is a structural schematic diagram of the moving plate of the present invention;

[0028] Figure 3 is a cross-sectional structural schematic diagram of the rotating cylinder of the present invention;

[0029] Figure 4 is a cross-sectional structural schematic diagram of the round steel mounting frame of the present invention;

[0030] Figure 5 is a structural schematic diagram of the external gear ring of the present invention.

[0031] Reference numerals: 1, grinding table; 2, electric push rod; 3, support plate; 4, round steel mounting frame; 5, external gear ring; 6, internal gear ring; 7, first gear; 8, drive motor; 9, first threaded rod; 10, moving plate; 11, sliding groove; 12, first motor; 13, second motor; 14, fixed frame; 15, rotating cylinder; 16, grinding plate; 17, moving seat; 18, fixing plate; 19, first connecting rod; 20, clamping plate; 21, second gear; 22, bidirectional threaded rod; 23, rotating motor; 24, second threaded rod; 25, second connecting rod; 26, rotating frame; 27, rotating seat. DETAILED DESCRIPTION OF THE INVENTION

[0032] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The function of the accompanying drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention. However, it should not be construed as a limitation on the protection scope of the present invention.

[0033] In the description of the present invention, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the present invention.

[0034] In the description of the present invention, "greater than", "less than", "exceeding", etc. are understood as not including the number itself, and "above", "below", "within", etc. are understood as including the number itself. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence relationship of the indicated technical features.

[0035] In the description of the present invention, unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meaning of the above words in the present invention in combination with the specific content of the technical solution.

[0036] Please refer to Figures 1-5 , the present invention provides a technical solution: a grinding device for the surface of round steel, including:

[0037] A grinding table 1, a sliding groove 11 is opened at the top of the grinding table 1, and a round steel clamping structure is arranged above the grinding table 1;

[0038] A grinding adjustment structure, the grinding adjustment structure is located on the grinding table 1;

[0039] The grinding adjustment structure includes a first motor 12, a first threaded rod 9, a moving plate 10, a fixed frame 14, a second motor 13 and a rotating cylinder 15. The first threaded rod 9 is rotatably connected inside the sliding groove 11. The first motor 12 is fixedly installed on one side of the grinding table 1. The output end of the first motor 12 rotatably extends into the inside of the sliding groove 11 and is fixedly connected to the first threaded rod 9. The moving plate 10 is threadedly sleeved on the outer surface of the first threaded rod 9. The moving plate 10 is slidably connected inside the sliding groove 11. The fixed frame 14 is fixedly connected to the top of the moving plate 10. The second motor 13 is fixedly installed on one side of the fixed frame 14. The output end of the second motor 13 rotatably penetrates the fixed frame 14 and is fixedly connected to the rotating cylinder 15. Four limiting sliding grooves are opened on the outer surface of the rotating cylinder 15.

[0040] The grinding adjustment structure further includes four rotating seats 27, four grinding plates 16, a rotating frame 26, a rotating motor 23 and a second threaded rod 24. The rotating motor 23 is fixedly installed inside the rotating cylinder 15. The output end of the rotating motor 23 is fixedly connected to the second threaded rod 24. The second threaded rod 24 is rotatably connected inside the rotating cylinder 15. The rotating frame 26 is threadedly sleeved on the outer surface of the second threaded rod 24. The four rotating seats 27 are all fixedly connected to the outer surface of the rotating cylinder 15. A second connecting rod 25 is rotatably connected inside each of the four rotating seats 27. One end of each of the four second connecting rods 25 away from the corresponding rotating seat 27 is rotatably connected to the corresponding grinding plate 16. Four identical second connecting rods 25 are rotatably connected inside the rotating frame 26. One end of each of the four second connecting rods 25 close to the rotating motor 23 away from the rotating frame 26 is rotatably connected to the corresponding grinding plate 16. The four second connecting rods 25 close to the rotating motor 23 are all located inside the corresponding limiting sliding grooves.

[0041] The round steel clamping structure includes a round steel mounting frame 4, an external gear ring 5, an internal gear ring 6, a first gear 7 and a driving motor 8. The round steel mounting frame 4 is fixedly connected to the top of the grinding table 1. The internal gear ring 6 is rotatably connected to one side of the round steel mounting frame 4 away from the first motor 12. The external gear ring 5 is fixedly sleeved on the outer surface of the internal gear ring 6. The driving motor 8 is fixedly installed on the outer surface of the round steel mounting frame 4. The output end of the driving motor 8 is fixedly connected to the first gear 7. The first gear 7 is meshed with the external gear ring 5. A clamping assembly is arranged inside the round steel mounting frame 4.

[0042] The clamping assembly includes two fixing plates 18, two moving seats 17, two first connecting rods 19, a clamping plate 20, a second gear 21 and a bidirectional threaded rod 22. The two fixing plates 18 are both fixedly connected to the inner wall of the round steel mounting frame 4. The bidirectional threaded rod 22 is rotatably connected inside the opposite surfaces of the two fixing plates 18. The two moving seats 17 are both threadedly sleeved on the outer surface of the bidirectional threaded rod 22. The two moving seats 17 are both slidably connected to the inner wall of the round steel mounting frame 4. The two first connecting rods 19 are both rotatably connected inside the corresponding moving seats 17. One end of each of the two first connecting rods 19 away from the corresponding moving seat 17 is rotatably connected to the clamping plate 20. One end of the bidirectional threaded rod 22 rotatably penetrates through the corresponding fixing plate 18 and is fixedly connected to the second gear 21. The second gear 21 is meshed with the internal gear ring 6.

[0043] The number of the clamping assemblies is four. The four clamping assemblies are arranged in a circular array inside the round steel mounting frame 4. The four second gears 21 are all meshed with the internal gear ring 6. An electric push rod 2 is fixedly installed on the top of the grinding table 1. The telescopic end of the electric push rod 2 is fixedly connected to a support plate 3.

[0044] A usage method of a round steel surface grinding device includes:

[0045] S1: Connect the electric push rod 2 and the drive motor 8 to an external power supply and start them;

[0046] S2: The drive motor 8 drives the first gear 7 to rotate. The first gear 7 drives the internal gear ring 6 to rotate through the external gear ring 5. The rotation of the internal gear ring 6 drives the four second gears 21 to rotate. The rotation of the four second gears 21 drives the corresponding bidirectional threaded rods 22 to rotate. The rotation of the four bidirectional threaded rods 22 drives the two moving seats 17 thereon to move in opposite directions under the guidance of the inner wall of the round steel mounting frame 4. The movement of the two moving seats 17 on the bidirectional threaded rod 22 drives the first connecting rod 19 thereon to move and rotate, thereby facilitating the clamping and fixing of the round steel by the four clamping plates 20;

[0047] S3: The electric push rod 2 drives the support plate 3 to move upward, thereby facilitating the contact between the support plate 3 and the surface of the round steel, enabling the support plate 3 to support the round steel;

[0048] S4: Connect the first motor 12, the second motor 13 and the rotation motor 23 to an external power supply and start them;

[0049] S5: The first motor 12 drives the first threaded rod 9 to rotate. The rotation of the first threaded rod 9 drives the moving plate 10 to move horizontally under the guidance of the sliding groove 11. The movement of the moving plate 10 drives the rotating cylinder 15 thereon to insert into the inside of the round steel;

[0050] S6: The rotation motor 23 drives the second threaded rod 24 to rotate. The rotation of the second threaded rod 24 drives the rotating frame 26 to move horizontally under the guidance of the four second connecting rods 25 thereon, enabling the rotating frame 26 to move away from the rotation motor 23, thereby facilitating the rotating frame 26 to drive the four second connecting rods 25 thereon to move and rotate. The movement of the four second connecting rods 25 on the rotating frame 26 drives the four grinding plates 16 to move under the cooperation of rotating the second connecting rods 25 in the four rotating seats 27, enabling the four grinding plates 16 to expand outwards, thereby facilitating the four grinding plates 16 to fit against the inner wall of the round steel;

[0051] S7: The second motor 13 drives the rotating cylinder 15 to rotate, thereby facilitating the four grinding plates 16 to grind and repair the inner wall of the round steel. Thus, the first threaded rod 9 can slowly drive the moving plate 10 to move, thereby facilitating the four grinding plates 16 to grind the inside of the round steel.

[0052] Further, when using this device, by connecting an external power supply to start the electric push rod 2 and the drive motor 8, the drive motor 8 will drive the first gear 7 to rotate. The first gear 7 will drive the internal gear ring 6 to rotate through the external gear ring 5. The rotation of the internal gear ring 6 will drive the four second gears 21 to rotate. The rotation of the four second gears 21 will drive the corresponding bidirectional threaded rods 22 to rotate. The rotation of the four bidirectional threaded rods 22 will drive the two moving seats 17 thereon to move in opposite directions under the guidance of the inner wall of the round steel mounting frame 4. The movement of the two moving seats 17 on the bidirectional threaded rod 22 will drive the first connecting rod 19 thereon to move and rotate, thereby facilitating the clamping and fixing of the round steel by the four clamping plates 20. The electric push rod 2 will drive the support plate 3 to move upward, thereby facilitating the contact between the support plate 3 and the surface of the round steel, enabling the support plate 3 to support the round steel.

[0053] Further, when using this device, by connecting an external power supply to start the first motor 12, the second motor 13 and the rotating motor 23, the first motor 12 will drive the first threaded rod 9 to rotate. The rotation of the first threaded rod 9 will drive the moving plate 10 to move horizontally under the guidance of the sliding groove 11. The movement of the moving plate 10 will drive the rotating cylinder 15 thereon to insert into the inside of the round steel. The rotating motor 23 will drive the second threaded rod 24 to rotate. The rotation of the second threaded rod 24 will drive the rotating frame 26 to move horizontally under the guidance of the four second connecting rods 25 thereon, enabling the rotating frame 26 to move away from the rotating motor 23, thereby facilitating the rotating frame 26 to drive the four second connecting rods 25 thereon to move and rotate. The movement of the four second connecting rods 25 on the rotating frame 26 will drive the four grinding plates 16 to move under the cooperation of the rotation of the second connecting rods 25 in the four rotating seats 27, enabling the four grinding plates 16 to expand outward, thereby facilitating the four grinding plates 16 to fit against the inner wall of the round steel. The second motor 13 will drive the rotating cylinder 15 to rotate, thereby facilitating the four grinding plates 16 to grind and repair the inner wall of the round steel. Thus, the first threaded rod 9 can slowly drive the moving plate 10 to move, thereby facilitating the four grinding plates 16 to grind the inside of the round steel.

[0054] Through the cooperation of the rotating cylinder 15, the second threaded rod 24, the rotating frame 26, the second connecting rods 25, the grinding plates 16 and the rotating seats 27, the second threaded rod 24 will drive the rotating frame 26 to move horizontally under the guidance of the four second connecting rods 25 thereon. Thus, under the rotational cooperation of the second connecting rods 25 at both ends of the grinding plate 16, it can move and expand outward, thereby facilitating the four grinding plates 16 to fit against the inner wall of the round steel, enabling the four grinding plates 16 to grind the inside of the round steel, and further facilitating the adaptation to round steel of different diameters, further improving the practicality of this grinding tool.

[0055] With the cooperation of the electric push rod 2 and the support plate 3, the electric push rod 2 drives the support plate 3 to move upward, facilitating the contact between the support plate 3 and the surface of the round steel, enabling the support plate 3 to support the round steel, and thus improving the stability of the round steel during grinding.

[0056] Working principle: By connecting to an external power source to start the first motor 12, the second motor 13, and the rotating motor 23, the first motor 12 drives the first threaded rod 9 to rotate. The rotation of the first threaded rod 9 drives the moving plate 10 to move horizontally under the guidance of the sliding groove 11. The movement of the moving plate 10 drives the rotating cylinder 15 on it to insert into the inside of the round steel. The rotating motor 23 drives the second threaded rod 24 to rotate. The rotation of the second threaded rod 24 drives the rotating frame 26 to move horizontally under the guidance of the four second connecting rods 25 on it, enabling the rotating frame 26 to move away from the rotating motor 23, thus facilitating the rotating frame 26 to drive the four second connecting rods 25 on it to move and rotate. The movement of the four second connecting rods 25 on the rotating frame 26 drives the four grinding plates 16 to move under the cooperation of the rotation of the second connecting rods 25 in the four rotating seats 27, enabling the four grinding plates 16 to expand outwards, thus facilitating the four grinding plates 16 to fit against the inner wall of the round steel. The second motor 13 drives the rotating cylinder 15 to rotate, thus facilitating the four grinding plates 16 to grind and repair the inner wall of the round steel. Therefore, the first threaded rod 9 can slowly drive the moving plate 10 to move, thus facilitating the four grinding plates 16 to grind the inside of the round steel.

[0057] The above has described the embodiments of the present invention in detail with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art in the technical field, various changes can be made without departing from the gist of the present invention.

Claims

1. A round steel surface grinding device, characterized in that: include: A grinding table (1), wherein a sliding groove (11) is provided on the top of the grinding table (1), and a round steel clamping structure is provided above the grinding table (1); A grinding adjustment structure, the grinding adjustment structure is located on the grinding table (1); The grinding adjustment structure comprises a first motor (12), a first threaded rod (9), a movable plate (10), a fixed frame (14), a second motor (13) and a rotating drum (15); the first threaded rod (9) is rotatably connected to the inside of a sliding groove (11); the first motor (12) is fixedly installed on one side of the grinding table (1); the output end of the first motor (12) is rotatably extended into the inside of the sliding groove (11) and is fixedly connected to the first threaded rod (9); The movable plate (10) is threadedly sleeved on the outer surface of the first threaded rod (9), the movable plate (10) is slidably connected inside the sliding groove (11), and the fixed frame (14) is fixedly connected to the top of the movable plate (10); The second motor (13) is fixedly mounted on one side of the fixing frame (14), the output end of the second motor (13) rotates through the fixing frame (14) and is fixedly connected to the rotating drum (15), and four limiting sliding grooves are provided on the outer surface of the rotating drum (15).

2. The round steel surface grinding device according to claim 1, characterized in that: The grinding and adjusting structure further comprises four rotating seats (27), four grinding plates (16), a rotating frame (26), a rotating motor (23) and a second threaded rod (24); the rotating motor (23) is fixedly mounted inside the rotating drum (15); the output end of the rotating motor (23) is fixedly connected to the second threaded rod (24); and the second threaded rod (24) is rotatably connected inside the rotating drum (15); The rotating frame (26) is threadedly sleeved on the outer surface of the second threaded rod (24), the four rotating seats (27) are fixedly connected to the outer surface of the rotating drum (15), the interiors of the four rotating seats (27) are rotatably connected to the second connecting rods (25), and the ends of the four second connecting rods (25) away from the corresponding rotating seats (27) are rotatably connected to the corresponding grinding plates (16); Among them, four identical second connecting rods (25) are rotatably connected inside the rotating frame (26), and the ends of the four second connecting rods (25) close to the rotating motor (23) away from the rotating frame (26) are rotatably connected to the corresponding grinding plates (16), and the four second connecting rods (25) close to the rotating motor (23) are all located inside the corresponding limiting slide grooves.

3. The round steel surface grinding device according to claim 1, characterized in that: The round steel clamping structure comprises a round steel mounting frame (4), an outer gear ring (5), an inner gear ring (6), a first gear (7) and a driving motor (8); the round steel mounting frame (4) is fixedly connected to the top of the grinding table (1); the inner gear ring (6) is rotatably connected to a side of the round steel mounting frame (4) away from the first motor (12); and the outer gear ring (5) is fixedly sleeved on the outer surface of the inner gear ring (6); The drive motor (8) is fixedly mounted on the outer surface of the round steel mounting frame (4), the output end of the drive motor (8) is fixedly connected to the first gear (7), the first gear (7) is meshingly connected to the outer gear ring (5), and a clamping assembly is arranged inside the round steel mounting frame (4).

4. The round steel surface grinding device according to claim 3 is characterized in that: The clamping assembly comprises two fixed plates (18), two movable seats (17), two first connecting rods (19), a clamping plate (20), a second gear (21) and a bidirectional threaded rod (22), the two fixed plates (18) are fixedly connected to the inner wall of the round steel mounting frame (4), and the bidirectional threaded rod (22) is rotatably connected to the opposite surfaces of the two fixed plates (18); Wherein, the two movable seats (17) are both threadedly sleeved on the outer surface of the bidirectional threaded rod (22), the two movable seats (17) are both slidably connected to the inner wall of the round steel mounting frame (4), and the two first connecting rods (19) are both rotatably connected in the corresponding movable seats (17); Among them, one end of the two first connecting rods (19) away from the corresponding moving seat (17) is rotatably connected to the clamping plate (20), one end of the bidirectional threaded rod (22) rotates through the corresponding fixed plate (18) and is fixedly connected to the second gear (21), and the second gear (21) is meshed with the inner gear ring (6).

5. The round steel surface grinding device according to claim 4, characterized in that: There are four clamping assemblies, which are arranged in a circular array inside the round steel mounting frame (4), and the four second gears (21) are all meshedly connected with the inner gear ring (6).

6. The round steel surface grinding device according to claim 1, characterized in that: An electric push rod (2) is fixedly mounted on the top of the grinding table (1), and a support plate (3) is fixedly connected to the telescopic end of the electric push rod (2).

7. A method for using a round steel surface grinding device, characterized in that: include: S1: connecting the electric push rod (2) and the drive motor (8) to an external power source and starting; S2: The driving motor (8) drives the first gear (7) to rotate, and the first gear (7) drives the inner gear ring (6) to rotate through the outer gear ring (5). The rotation of the inner gear ring (6) drives the four second gears (21) to rotate, and the rotation of the four second gears (21) drives the corresponding bidirectional threaded rods (22) to rotate. The rotation of the four bidirectional threaded rods (22) drives the two movable seats (17) thereon to move in opposite directions under the guidance of the inner wall of the round steel mounting frame (4). The movement of the two movable seats (17) on the bidirectional threaded rods (22) drives the first connecting rod (19) thereon to move and rotate, thereby facilitating the four clamping plates (20) to clamp and fix the round steel. S3: The electric push rod (2) drives the support plate (3) to move upward, so that the support plate (3) can contact the surface of the round steel, so that the support plate (3) can support the round steel; S4: connecting to an external power source through the first motor (12), the second motor (13) and the rotating motor (23) and starting; S5: The first motor (12) drives the first threaded rod (9) to rotate, and the rotation of the first threaded rod (9) drives the movable plate (10) to move horizontally under the guidance of the sliding groove (11), and the movement of the movable plate (10) drives the rotating drum (15) thereon to be inserted into the interior of the round steel; S6: The rotating motor (23) drives the second threaded rod (24) to rotate, and the rotation of the second threaded rod (24) drives the rotating frame (26) to move horizontally under the guidance of the four second connecting rods (25) thereon, so that the rotating frame (26) can move away from the rotating motor (23), thereby facilitating the rotating frame (26) to drive the four second connecting rods (25) thereon to move and rotate. The movement of the four second connecting rods (25) on the rotating frame (26) will drive the four grinding plates (16) to move in cooperation with the rotating second connecting rods (25) in the four rotating seats (27), so that the four grinding plates (16) can expand outward, thereby facilitating the four grinding plates (16) to fit with the inner wall of the round steel; S7: The second motor (13) drives the rotating drum (15) to rotate, thereby facilitating the four grinding plates (16) to grind and repair the inner wall of the round steel, so that the first threaded rod (9) can slowly drive the moving plate (10) to move, thereby facilitating the four grinding plates (16) to grind the inside of the round steel.

Images