Auxiliary device for straightening short steel pipe

By designing an automated short steel pipe straightening auxiliary device, the problem of high safety risks in manual handling of steel pipes in the existing technology is solved, and an efficient and safe steel pipe straightening process is achieved.

CN223454978UActive Publication Date: 2025-10-21DALIAN QIANCHENG STEEL PIPE MFG CO LTD
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Patent Information

Application Number
CN202422888546.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-11-26
Publication Date
2025-10-21
Estimated Expiration
2034-11-26

AI Technical Summary

Technical Problem

Existing short steel pipe straightening machines require workers to manually carry the steel pipes to a certain height on the machine platform, which poses safety risks and low efficiency.

Method used

A short steel pipe straightening auxiliary device was designed, which included a workbench, a support assembly, an electric slide, a hydraulic rod and a servo motor. The device can clamp and rotate the steel pipe through automatic control, reducing manual operation.

Benefits of technology

It improves the safety and efficiency of the steel pipe straightening process, reduces the risk of manual operation, and reduces the possibility of equipment damage and personal injury.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses an auxiliary device for straightening a short steel pipe, and relates to the technical field of short steel pipe straightening. The device comprises a working table, a supporting assembly with a telescopic function is arranged at the bottom of the working table, electric sliding blocks are arranged on the two sides of the working table in a sliding mode respectively, a U-shaped frame is fixedly installed on the tops of the two electric sliding blocks, and a first hydraulic rod is fixedly installed on the top face in the U-shaped frame. When the rotating shaft rotates by 180 degrees, each group of L-shaped rods synchronously rotate by 180 degrees, at the moment, a steel pipe is driven to the position above the working table, then each hydraulic rod II is controlled, every two adjacent V-shaped blocks are far away from each other to loosen the steel pipe, the steel pipe falls into a plurality of bearing blocks, and the steel pipe is conveyed to the working table. A worker only needs to control the rotating assembly to conduct inner supporting on a steel pipe so that the steel pipe can be rotated when straightened, the electric sliding block can drive the U-shaped frame to conduct linear reciprocating motion, the first hydraulic rod can drive the straightening block to press the steel pipe downwards, and straightening work of the steel pipe is completed.
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Description

TECHNICAL FIELD

[0001] The utility model relates to short steel pipe straightening technical field, specifically related to a short steel pipe straightening auxiliary device. BACKGROUND

[0002] Short steel pipe straightening auxiliary device is a kind of mechanical equipment or tool combination specially used for short steel pipe straightening.It is mainly composed of rack, clamping device, straightening mechanism, transmission device and control system etc., and the straightness of the bent steel pipe is restored by exerting external force.The device has the advantages of high precision, high efficiency, high degree of automation, and is widely used in building, machinery manufacturing and other fields, which is of great significance to improve the straightness and dimensional accuracy of steel pipe.

[0003] The existing short steel pipe straightening machine needs to be manually carried to a certain height of machine table by workers during use, and this process needs workers to frequently bend down and lift heavy objects, which not only increases the risk of injury, but also may cause the steel pipe to slide due to improper operation, causing equipment damage or personal injury, and also affects work efficiency, so a short steel pipe straightening auxiliary device is proposed. UTILITY MODEL CONTENT

[0004] The utility model aims at: to solve the problem that the existing short steel pipe straightening machine needs to be manually carried to a certain height of machine table by workers, and there is a certain safety risk, the utility model provides a short steel pipe straightening auxiliary device.

[0005] The utility model realizes the above-mentioned purpose by adopting the following technical scheme:

[0006] A short steel pipe straightening auxiliary device, including workbench, the bottom of workbench is provided with the support assembly with telescopic function, the both sides of workbench are slidably provided with electric sliding block, the top of two electric sliding blocks is fixedly installed with U type frame in common, the inside top surface of U type frame is fixedly installed with hydraulic rod one, the output end of hydraulic rod one is fixedly connected with straightening block, the top of workbench is provided with window, the inside of window is movably installed with rotatable rotating shaft, the side wall surface of workbench is fixedly installed with servo motor no.

[0007] Further, the side wall surface of the rotating shaft is provided with two convex grooves which are mirror images, each adjacent two L-shaped rods are fixedly installed with convex blocks at one end close to each other, each convex block is movably installed in the adjacent convex groove, the side wall surface of the rotating shaft is provided with a cross-shaped cross groove, each adjacent two convex blocks are fixedly installed with a T-shaped block in the middle, each T-shaped block is fixedly connected with the adjacent hydraulic rod three, the bottom of each T-shaped block is fixedly installed with a lead screw one, and each lead screw one is threadedly connected with a nut one.

[0008] Further, the support assembly comprises square tubes, the bottom of the workbench is provided with four square tubes, the side wall surface of each square tube is provided with a through hole, the inner side wall surface of each square tube is provided with a sliding groove, each sliding groove is movably installed with a sliding rod, the side wall surface of each sliding rod is fixedly installed with a rack, each rack is fixedly installed on the bottom of the workbench, the side wall surfaces of each rack are fixedly installed with an electric telescopic rod, the side wall surface of each square tube is fixedly installed with a mounting block, two mounting blocks on the same side are movably installed with a connecting rod in the middle, each connecting rod is sleeved with a gear ring, each gear ring is meshed and connected with the adjacent rack, and the side wall surfaces of the two mounting blocks close to the rotating assembly are fixedly installed with a servo motor one for driving the adjacent connecting rod to rotate.

[0009] Further, the rotating assembly comprises a rectangular tube, the top of the workbench is provided with a movable rectangular tube, the inside of the rectangular tube is movably installed with a square rod, the side wall surface of the square rod is fixedly installed with a servo motor three, the output end of the servo motor three is fixedly connected with a round rod, the side wall surface of the round rod is fixedly installed with four uniformly distributed hydraulic rods four, the side wall surface of the rectangular tube is provided with a strip-shaped hole, the side wall surface of the square rod is fixedly installed with a lead screw two penetrating through the strip-shaped hole, and the lead screw two is threadedly connected with a nut two.

[0010] Further, the rotating assembly comprises a long hole, the top of the workbench is provided with a long hole, the bottom of the rectangular tube is fixedly installed with a moving block, the moving block is movably installed in the long hole, the bottom of the moving block is fixedly installed with a lead screw three, and the lead screw three is threadedly connected with a nut three.

[0011] Further, the inside of each V-shaped block is provided with a groove in the two inner side walls, and each groove is movably installed with a rolling rod.

[0012] The beneficial effects of the utility model are as follows:

[0013] 1. The utility model discloses a first according to the length of straightening steel pipe adjusts the position of each group L type pole, makes the distance between every two adjacent L type poles and adjusts suitable, when loading the steel pipe, only needs to control servo motor no. 2, utilizes servo motor no. 2 to drive the rotation of the shaft 180 degrees, and the rotation of the shaft 180 degrees will make every group L type pole synchronous rotation 180 degrees, at this moment, every V type block is placed below the workbench, then controls the support subassembly and makes the workbench descend, purpose makes every V type block contact with the ground, then the staff only needs to push the steel pipe to below the workbench, makes the steel pipe pass through the middle of every two adjacent V type blocks simultaneously, controls every hydraulic rod no. 2 again, makes every two adjacent V type blocks close to each other and clamps the steel pipe, controls servo motor no. 2 again, utilizes servo motor no. 2 to drive the rotation of 180 degrees, and the rotation of the shaft 180 degrees will make every group L type pole synchronous rotation 180 degrees, at this moment, the steel pipe will be driven to above the workbench, then controls every hydraulic rod no. 2, makes every two adjacent V type blocks away from each other and loosens the steel pipe, makes the steel pipe fall to the inside of a plurality of bearing blocks, and the staff only needs to control the rotation subassembly and props up the steel pipe from inside, thereby facilitating the rotation of the steel pipe when straightening, and the electric sliding block can drive the U type frame to move linearly, and the hydraulic rod no. 1 can drive the straightening block to press down the steel pipe, to complete the straightening work of the steel pipe. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;

[0015] Figure 2 It is the V type block specific schematic diagram of the utility model;

[0016] Figure 3 It is the support subassembly specific schematic diagram of the utility model;

[0017] Figure 4 It is the rotation subassembly specific schematic diagram of the utility model;

[0018] Label: 1, workbench; 2, support assembly; 201, square cylinder; 202, through hole; 203, sliding groove; 204, sliding rod; 205, rack; 206, electric telescopic rod; 207, mounting block; 208, connecting rod; 209, gear ring; 210, servo motor one; 3, electric sliding block; 4, U-shaped frame; 5, hydraulic rod one; 6, straightening block; 7, window; 8, rotating shaft; 9, servo motor two; 10, L-shaped rod; 11, hydraulic rod two; 12, V-shaped block; 13, hydraulic rod three; 14, bearing block; 15, convex groove; 16, convex block; 17, cross groove; 18, T-shaped block; 19, screw rod one; 20, nut one; 21, rotating assembly; 2101, rectangular cylinder; 2102, square rod; 2103, servo motor three; 2104, round rod; 2105, hydraulic rod four; 2106, strip-shaped hole; 2107, screw rod two; 2108, nut two; 2109, long strip hole; 2110, moving block; 2111, screw rod three; 2112, nut three; 22, groove; 23, rolling rod. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0021] It should be noted that: similar labels and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0022] In the description of the embodiments of the utility model, it needs to be explained that the directions or position relations indicated by the terms "inner", "outer", "upper" and the like are based on the directions or position relations shown in the drawings, or are the directions or position relations in which the utility model product is usually placed during use, and are only for the convenience of describing the utility model and simplifying the description, and thus cannot be understood as limiting the utility model in that the indicated devices or elements must have a specific direction, be constructed and operated in a specific direction, and thus cannot be understood as limiting the utility model.

[0023] As Figures 1 to 4As shown, a short steel pipe straightening auxiliary device, including the workbench 1, the bottom of the workbench 1 is provided with the support assembly 2 with telescopic function, the two sides of the workbench 1 are slidably provided with the electric sliding block 3, the top of the two electric sliding blocks 3 is commonly fixedly installed with the U-shaped frame 4, the inside top surface of the U-shaped frame 4 is fixedly installed with the hydraulic rod one 5, the output end of the hydraulic rod one 5 is fixedly connected with the straightening block 6, the top of the workbench 1 is provided with the window 7, the inside of the window 7 is movably installed with the rotatable rotating shaft 8, the side wall surface of the workbench 1 is fixedly installed with the servo motor two 9 for driving the rotating shaft 8 to rotate, the rotating shaft 8 is provided with a plurality of groups of L-shaped rods 10 with adjustable spacing, each group of L-shaped rods 10 is composed of two mirror image distributed L-shaped rods 10, each L-shaped rod 10 is fixedly installed with the hydraulic rod two 11, the output end of each hydraulic rod two 11 is fixedly connected with the V-shaped block 12, the middle of each group of L-shaped rods 10 is provided with the hydraulic rod three 13 synchronously moving with the adjacent group of L-shaped rods 10, the output end of each hydraulic rod three 13 is fixedly connected with the bearing block 14, the top of the workbench 1 is provided with the rotating assembly 21 for driving the steel pipe to rotate, it should be noted that first, according to the length of the straightening steel pipe, the position of each group of L-shaped rods 10 is adjusted, so that the distance between each adjacent two groups of L-shaped rods 10 is adjusted appropriately, when the steel pipe is fed, the servo motor two 9 is only controlled, the servo motor two 9 drives the rotating shaft 8 to rotate one hundred and eighty degrees, the rotating shaft 8 rotates one hundred and eighty degrees to synchronously rotate each group of L-shaped rods 10 one hundred and eighty degrees, at this time, each V-shaped block 12 is placed below the workbench 1, then the support assembly 2 is controlled to make the workbench 1 descend, so that each V-shaped block 12 is in contact with the ground, then the staff only needs to push the steel pipe to the lower side of the workbench 1, so that the steel pipe passes through the middle of each adjacent two V-shaped blocks 12 at the same time, then each hydraulic rod two 11 is controlled, so that each adjacent two V-shaped blocks 12 are close to each other to clamp the steel pipe, then the servo motor two 9 is controlled, the servo motor two 9 drives the rotating shaft 8 to rotate one hundred and eighty degrees, the rotating shaft 8 rotates one hundred and eighty degrees to synchronously rotate each group of L-shaped rods 10 one hundred and eighty degrees, at this time, the steel pipe will be driven to the upper side of the workbench 1, then each hydraulic rod two 11 is controlled, so that each adjacent two V-shaped blocks 12 are away from each other to release the steel pipe, so that the steel pipe falls into the inside of the bearing block 14, the staff only needs to manipulate the rotating assembly 21 to support the steel pipe from inside, so as to facilitate the rotation of the straightening steel pipe, the electric sliding block 3 can drive the U-shaped frame 4 to move linearly, the hydraulic rod one 5 can drive the straightening block 6 to press down the steel pipe, to complete the straightening work of the steel pipe.

[0024] As Figure 1 , Figure 2As shown, the side wall surface of the rotating shaft 8 is provided with two mirror image distributed convex grooves 15, each adjacent two L-shaped rods 10 are fixedly installed with convex blocks 16 at one end close to each other, each convex block 16 is movably installed in the adjacent convex groove 15, the side wall surface of the rotating shaft 8 is provided with a cross-shaped cross groove 17, each adjacent two convex blocks 16 are fixedly installed with T-shaped blocks 18 in the middle, each T-shaped block 18 is fixedly connected with the adjacent hydraulic rod three 13, the bottom of each T-shaped block 18 is fixedly installed with a lead screw one 19, each lead screw one 19 is threadedly connected with a nut one 20, it should be noted that by moving each group of L-shaped rods 10, each group of L-shaped rods 10 drives the convex block 16 connected therewith to slide in the corresponding convex groove 15 respectively, the movement of each convex block 16 also drives the T-shaped block 18 connected therewith to slide in the corresponding cross groove 17, when each group of L-shaped rods 10 moves to the appropriate position, rotate the corresponding nut one 20 to fix each group of L-shaped rods 10 at the current position.

[0025] As shown in Figure 1 , Figure 3 , Figure 4 The support assembly 2 comprises a square cylinder 201, the bottom of the workbench 1 is provided with four square cylinders 201, the side wall surface of each square cylinder 201 is provided with a through hole 202, the inner side wall surface of each square cylinder 201 is provided with a sliding groove 203, the sliding groove 203 is movably installed with a sliding rod 204, the side wall surface of the sliding rod 204 is fixedly installed with a rack 205, the rack 205 is fixedly installed on the bottom of the workbench 1, the two side wall surfaces of the rack 205 are fixedly installed with an electric telescopic rod 206 respectively, the side wall surface of each square cylinder 201 is fixedly installed with a mounting block 207, the two mounting blocks 207 on the same side are movably installed with a connecting rod 208 in the middle, the connecting rod 208 is sleeved with a gear ring 209, the gear ring 209 is meshed and connected with the adjacent rack 205, the side wall surfaces of the two mounting blocks 207 close to the rotating assembly 21 are fixedly installed with a servo motor one 210 for driving the adjacent connecting rod 208 to rotate, it should be noted that starting two servo motors one 210, the two servo motors one 210 can drive the two connecting rods 208 to rotate respectively, the rotation of each connecting rod 208 can drive the two gear rings 209 to rotate synchronously, the rotation of each gear ring 209 can drive the corresponding rack 205 to ascend and descend, the ascent and descent of each rack 205 drives the sliding rod 204 connected therewith to slide in the corresponding sliding groove 203, when the rack 205 ascends and descends to the appropriate height, start each electric telescopic rod 206 to make each electric telescopic rod 206 to support from inside in the corresponding square cylinder 201, the ascent and descent of the rack 205 can make the workbench 1 ascend and descend.

[0026] As shown in Figure 1 , Figure 4As shown, the rotating assembly 21 comprises a rectangular cylinder 2101, the top of the workbench 1 is provided with a movable rectangular cylinder 2101, the inside of the rectangular cylinder 2101 is movably provided with a square rod 2102, the side wall surface of the square rod 2102 is fixedly provided with a servo motor three 2103, the output end of the servo motor three 2103 is fixedly connected with a round rod 2104, the side wall surface of the round rod 2104 is fixedly provided with four uniformly distributed hydraulic rods four 2105, the side wall surface of the rectangular cylinder 2101 is provided with a strip hole 2106, the side wall surface of the square rod 2102 is fixedly provided with a lead screw two 2107 penetrating through the strip hole 2106, and the lead screw two 2107 is threadedly connected with a nut two 2108. It should be noted that first, the square rod 2102 is moved upward or downward, and then the nut two 2108 is rotated to fix the square rod 2102 at the current height after the height of the square rod 2102 is adjusted. When the steel pipe is placed inside the U-shaped frame 4, the rectangular cylinder 2101 is moved so that each hydraulic rod four 2105 is placed inside the steel pipe, and then each hydraulic rod four 2105 is started to support the steel pipe. Then, the servo motor three 2103 is controlled to drive the round rod 2104 and the hydraulic rod four 2105 to rotate, so that the steel pipe is rotated to facilitate straightening.

[0027] As shown in Figure 1 , Figure 4 , the rotating assembly 21 comprises a long hole 2109, the top of the workbench 1 is provided with a long hole 2109, the bottom of the rectangular cylinder 2101 is fixedly provided with a moving block 2110, the moving block 2110 is movably installed in the inside of the long hole 2109, the bottom of the moving block 2110 is fixedly provided with a lead screw three 2111, and the lead screw three 2111 is threadedly connected with a nut three 2112. It should be noted that the rectangular cylinder 2101 is moved, and the moving block 2110 connected with the rectangular cylinder 2101 is simultaneously moved in the inside of the long hole 2109, and then the nut three 2112 is rotated to fix the rectangular cylinder 2101 at the current position.

[0028] As shown in Figure 1 , Figure 2 , each V-shaped block 12 is provided with a groove 22 in the inside of each two inner side walls, and a rolling rod 23 is movably installed in the inside of each groove 22. It should be noted that since the rolling rod 23 can roll, when the steel pipe is fed, the steel pipe can be sequentially inserted between each adjacent two V-shaped blocks 12

[0029] In summary:

[0030] First according to the length of the straightening steel pipe each group L type rod 10 position adjustment good, make each adjacent two groups L type rod 10 between the distance adjustment suitable, in the steel pipe is loaded, only need to control servo motor two 9, using servo motor two 9 driven rotating shaft 8 rotates one hundred and eighty degrees, rotating shaft 8 rotates one hundred and eighty degrees will make each group L type rod 10 synchronous rotation one hundred and eighty degrees, at this time each V type block 12 are placed in the workbench 1 below, then control the support assembly 2 makes the workbench 1 drop, purpose make each V type block 12 are in contact with the ground, then the staff only need to push the steel pipe to the workbench 1 below, make the steel pipe simultaneously through each adjacent two V type block 12 middle, control each hydraulic rod two 11 again, make each adjacent two V type block 12 close to each other and clamp the steel pipe, control servo motor two 9 again, using servo motor two 9 driven rotating one hundred and eighty degrees, rotating shaft 8 rotates one hundred and eighty degrees will make each group L type rod 10 synchronous rotation one hundred and eighty degrees, at this time the steel pipe will be driven to the workbench 1 above, then control each hydraulic rod two 11, make each adjacent two V type block 12 away from each other and loosen the steel pipe, make the steel pipe fall to the inside of several bearing blocks 14, the staff only need to control rotating assembly 21 to the steel pipe is supported, so as to facilitate the straightening steel pipe when rotating, electric sliding block 3 can drive U type frame 4 to carry out linear reciprocating motion, hydraulic rod one 5 can drive straightening block 6 to press the steel pipe, complete the straightening work of the steel pipe.

[0031] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements fall within the scope of the claimed present application. The scope of protection required by the present application is defined by the appended claims and their equivalents.

Claims

1. A short steel pipe straightening auxiliary device, characterized in that: The utility model provides a workbench, the bottom of workbench (1) is provided with the support component (2) with telescopic function, both sides of workbench (1) are slidably provided with electric slide (3) respectively, the top of two electric slide (3) is fixedly installed with U type frame (4) in common, the inside top surface of U type frame (4) is fixedly installed with hydraulic rod one (5), the output of hydraulic rod one (5) is fixedly connected with straightening block (6), the top of workbench (1) is provided with window (7), the rotatable pivot (8) is movably installed in the inside of window (7), the side wall of workbench (1) is fixedly installed with servo motor no. 2 (9) for driving pivot (8) rotation, pivot (8) is provided with a plurality of groups of adjustable interval's L type rod (10), each group of L type rod (10) is formed by two mirror image distribution's L type rod (10), each L type rod (10) is fixedly installed with hydraulic rod two (11), the output of each hydraulic rod two (11) is fixedly connected with V type block (12), each group of L type rod (10) is provided with hydraulic rod three (13) synchronous movement with adjacent group of L type rod (10) in the middle, the output of each hydraulic rod three (13) is fixedly connected with bearing block (14), the top of workbench (1) is provided with rotating assembly (21) for driving steel pipe rotation.

2. The straightening aid device for short steel pipes according to claim 1, characterized by The side wall of pivot (8) is provided with two mirror image distribution's convex slot (15), each adjacent two L type rod (10) is fixedly installed with convex block (16) in the end of each other, each convex block (16) is movably installed in the inside of adjacent convex slot (15), the side wall of pivot (8) is provided with cross slot (17) of cross structure, each adjacent two convex block (16) is fixedly installed with T type block (18) in the middle, each T type block (18) is fixedly connected with adjacent hydraulic rod three (13), the bottom of each T type block (18) is fixedly installed with screw rod one (19), each screw rod one (19) is screw connected with nut one (20).

3. The straightening aid device for short steel pipes according to claim 1, characterized in that, The support assembly (2) includes a square cylinder (201), and the bottom of the workbench (1) is provided with four square cylinders (201), the side wall surface of each square cylinder (201) is provided with a through hole (202), the inner side wall surface of each square cylinder (201) is provided with a sliding groove (203), the inside of each sliding groove (203) is movably provided with a sliding rod (204), the side wall surface of each sliding rod (204) is fixedly provided with a rack (205), each rack (205) is fixedly installed on the bottom of the workbench (1), and the two side wall surfaces of each rack (205) are fixedly provided with an electric telescopic rod (206), respectively, the side wall surface of each square cylinder (201) is fixedly provided with a mounting block (207), the connecting rods (208) are movably arranged between the two mounting blocks (207) on the same side, the connecting rods (208) are provided with a gear ring (209), and the gear ring (209) is in meshing connection with the adjacent rack (205); the side wall surfaces of the two mounting blocks (207) close to the rotating assembly (21) are fixedly provided with a servo motor (210) for driving the adjacent connecting rod (208) to rotate.

4. The straightening aid device for short steel pipes according to claim 1, characterized in that, The rotating assembly (21) includes a rectangular cylinder (2101), and the top of the workbench (1) is provided with a movable rectangular cylinder (2101) The rotating assembly (21) includes a rectangular cylinder (2101), and the top of the workbench (1) is provided with a movable rectangular cylinder (2101) 5. The straightening aid device for short steel pipes according to claim 4, characterized in that, The rotating assembly (21) includes a long hole (2109), and the top of the workbench (1) is provided with a long hole (2109), the bottom of the rectangular cylinder (2101) is fixedly provided with a moving block (2110), the moving block (2110) is movably arranged in the long hole (2109), the bottom of the moving block (2110) is fixedly provided with a screw rod (2111), and the screw rod (2111) is threadedly connected with a nut (2112).

6. The straightening aid device for short steel pipes according to claim 1, wherein The inside of each V-shaped block (12) is provided with a recess (22) on the two inner side wall surfaces, respectively, and the inside of each recess (22) is movably provided with a rolling rod (23).