A positioning device for assembling steel structure components

Abstract

The present invention belongs to the technical field of steel structure assembly, specifically a positioning device for assembling steel structure components, including a base, a groove is provided on the top of the base, movable plates are symmetrically provided on both sides of the groove, the front and rear sides of the movable plates are respectively slidably connected to the front and rear side groove walls of the groove, and a first screw is inserted through a vertical thread between the two movable plates. After the U-shaped clamp cooperates with the electromagnet to fix the top steel component, when the position of the top steel component needs to be adjusted, the second motor can be started to allow the two U-shaped clamps to move closer to each other, and as the two U-shaped clamps move closer, the two electromagnets can drive the top steel component to move upward and separate from the bottom steel component under the action of the thrust of the two U-shaped clamps, and then the U-shaped bracket can be pulled to drive the top steel component to move, thereby improving the convenience of adjusting the position of the top steel component.

Description

Technical Field

[0001] The invention belongs to the technical field of steel structure assembly, and in particular relates to a positioning device for assembling steel structure components. Background Art

[0002] Steel structures refer to composite steel components made of steel plates, angle steel, channel steel, I-beams, and welded or hot-rolled H-beams, cold-bent or welded, connected by connectors. These components are capable of bearing and transmitting loads. In the actual production process, identical or similar products are often produced in batches. For some top steel structures, these components are assembled from multiple conventional steel plates. While the assembly process is simple, the frequent use of a measuring tape for layout significantly impacts production efficiency and introduces errors, affecting production accuracy.

[0003] To address this issue, a Chinese patent application, CN114434371A, proposes a positioning device for assembling steel structural components. The device comprises a "workbench, with a bottom steel component placed on its upper side, and top steel components fixedly connected at the four upper corners of the bottom steel component. The workbench is provided with two clamping mechanisms, which are arranged vertically and not on the same horizontal line." This device solves the problem of low steel component assembly efficiency. However, this invention still suffers from the following deficiencies in actual use:

[0004] First, after the top steel structure is placed on the bottom steel structure, when the position of the top steel structure needs to be adjusted, the top steel structure needs to be manually lifted to facilitate the adjustment of the position of the top steel structure, which is laborious and inconvenient.

[0005] Secondly, since there is only one sleeve for fixing the top steel member, the sleeve can only fix the top steel member from one side of the top steel member, resulting in a general fixing effect of the sleeve on the top steel member.

[0006] Therefore, it is necessary to invent a positioning device for assembling steel structure components to solve the above problems. Summary of the Invention

[0007] In view of the above problems, the present invention provides a positioning device for assembling steel structure components to solve the problems raised in the above background technology.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a positioning device for assembling steel structure components, comprising a base, a groove is opened on the top of the base, and movable plates are symmetrically provided at both sides of the groove, and the front and rear sides of the movable plates are respectively slidably connected to the front and rear side groove walls of the groove, and a vertical thread is inserted through the two movable plates, one end of the first screw is vertically rotatably connected to the groove wall of one side of the groove, and the other end of the first screw is rotatably inserted through the groove wall of the other side of the groove, and the end of the first screw is connected to the first motor. A splint is provided on the top of the movable plate, and two connecting blocks are fixedly connected between the splint and the movable plate, and a support plate is detachably installed at the top opening of the groove, and a strip through-hole is opened at the position opposite to the support plate and the connecting block, and a clamping device for fixing the steel component is symmetrically provided near the two sides of the top of the base.

[0009] The second end of the second screw is rotatably connected to the inner wall of the U-shaped bracket, and the other end of the second screw is rotatably inserted into the other side of the U-shaped bracket, and the end of the second screw is connected to the second motor, and the two fixing rods are separated from each other on one side. The U-shaped bracket is fixedly connected to the upper part of the U-shaped plate, and the free end of the U-shaped bracket slides vertically and is inserted into the U-shaped bracket. The inner side of the U-shaped bracket is provided with an electromagnet, and the side of the electromagnet opposite to the fixed rod is designed with an inclined surface, and the thickness of the electromagnet gradually becomes thinner from top to bottom. The side of the U-shaped bracket opposite to the electromagnet is also designed with an inclined surface, and the two fit tightly. Both sides of the electromagnet are fixedly connected with a strip-shaped limit block, and the inclination angle of the limit block is consistent with that of the electromagnet inclined surface. The side surface of the U-shaped bracket at the corresponding position of the limit block is penetrated by a limit hole matching the limit block, and the limit block is slidably installed in the corresponding limit hole. A telescopic rod is fixedly connected between the top of the limit block and the inner wall of the top of the limit hole, and a spring is sleeved on the telescopic rod.

[0010] Furthermore, the front and rear sides of the base are provided with connecting holes matching the length of the slide slot, and a connecting plate is inserted in the connecting hole, and the connecting plate is fixedly connected to the corresponding slider, and the connecting plate is fixedly connected to the side of the slider away from the slider, and fixed blocks are provided at both ends of the sleeve, and the fixed block is vertically fixedly connected to the base, and an adjusting rod matching the sleeve is inserted in the internal thread of the sleeve, and the adjusting rod and the sleeve are respectively the screw rod and the shaft sleeve of the ball screw in the prior art, one end of the adjusting rod is rotatably connected to the fixed block near the center of the base, and the other end of the adjusting rod is vertically rotated and inserted into another fixed block, and the free end of the adjusting rod is connected to a handwheel.

[0011] Furthermore, the top of the support plate is flush with the top of the base, and a plurality of strip grooves are opened on the top of the support plate in parallel along the front-to-back direction. A first roller is rotatably connected between the front and rear groove walls of the strip groove, and the top of the first roller is located outside the strip groove.

[0012] Furthermore, a receiving groove is provided on the side of the U-shaped clamping plate opposite to the inclined surface of the electromagnet, and a plurality of second rollers are rotatably connected between the groove walls on both sides of the receiving groove, and the second rollers are tightly fitted with the inclined surface of the electromagnet.

[0013] Furthermore, anti-slip stripes are evenly arranged on a side of the electromagnet away from the fixing rod, and the anti-slip stripes are parallel to the top surface of the base.

[0014] Furthermore, the front and rear sides of the U-shaped bracket are fixedly connected with U-shaped handles, and the handles are located in the lower half of the U-shaped bracket.

[0015] Furthermore, the threads of the first screw rod and the parts corresponding to the two movable plates and the threads of the second screw rod and the parts corresponding to the two fixed rods are designed in opposite directions.

[0016] Furthermore, a support block is fixedly connected to the bottom of the support plate, and the bottom of the support block is in contact with the bottom wall of the groove.

[0017] Technical effects and advantages of the present invention:

[0018] 1. After the U-shaped pallet cooperates with the electromagnet to fix the top steel member, when the position of the top steel member needs to be adjusted, the second motor can be started to make the two U-shaped pallets move closer to each other. As the two U-shaped pallets move closer, the electromagnets in the two U-shaped pallets can drive the top steel member to move upward and separate from the bottom steel member under the thrust of the two U-shaped pallets. Then, the U-shaped bracket can be pulled to drive the top steel member to move, thereby improving the convenience of adjusting the position of the top steel member.

[0019] 2. When fixing the top steel structure, the two U-shaped clamps can clamp the top steel structure from the front and back sides at the same time, and as the two U-shaped clamps continue to press the top steel structure, the electromagnet can maintain a close fit with the top steel structure under the action of the spring, and cooperate with the electromagnet's suction force on the top steel structure, thereby improving the stability of the U-shaped clamp when fixing the top steel structure, and then improving the accuracy of splicing the top and bottom steel structures.

[0020] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a three-dimensional schematic diagram of the base, support plate, adjustment rod and other structures in the present invention;

[0024] Figure 3 In the present invention Figure 2 A three-dimensional schematic diagram of part of the structure;

[0025] Figure 4 It is a three-dimensional schematic diagram of the structures of the limiting rod, fixing rod, U-shaped clamping plate and electromagnet in the present invention;

[0026] Figure 5 In the present invention Figure 4 A magnified view of part A;

[0027] Figure 6 It is a schematic diagram of the bottom three-dimensional structure of the support plate in the present invention.

[0028] In the figure: 1. base; 2. movable plate; 3. first screw; 4. first motor; 5. clamping plate; 6. support plate; 7. clamping device; 701. U-shaped bracket; 702. slider; 703. U-shaped clamping plate; 704. fixing rod; 705. second screw; 706. second motor; 707. limiting rod; 708. electromagnet; 709. limiting block; 710. telescopic rod; 711. spring; 8. connecting plate; 9. sleeve; 10. adjusting rod; 11. handwheel; 12. first roller; 13. second roller; 14. handle; 15. support block. DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0030] The present invention provides Figures 1 to 6 The positioning device shown in the figure is used for assembling steel structural members, including a base 1, a groove is opened on the top of the base 1, and movable plates 2 are symmetrically arranged on both sides of the groove. The front and rear sides of the movable plates 2 are respectively slidably connected with the front and rear side groove walls of the groove. A first screw rod 3 is inserted through a vertical thread between the two movable plates 2. One end of the first screw rod 3 is vertically connected to the groove wall on one side of the groove, and the other end of the first screw rod 3 is rotated and inserted into the groove wall on the other side of the groove. A first motor 4 is connected to one end of the first screw rod 3 that is rotated and inserted into the groove wall on the other side of the groove. A clamping plate 5 is provided on the top of the movable plate 2. The clamping plate 5 is connected to the movable plate 2. There are two connecting blocks fixedly connected between them, and a support plate 6 is detachably installed at the top opening of the groove, and a strip-shaped through-hole is provided through the position opposite to the support plate 6 and the connecting block. A clamping device 7 for fixing the steel member is symmetrically provided near the positions on both sides of the top of the base 1. The top of the support plate 6 is flush with the top of the base 1, and a plurality of strip grooves are provided on the top of the support plate 6 in parallel along the front and rear directions. A first roller 12 is rotatably connected between the front and rear groove walls of the strip groove, and the top of the first roller 12 is located outside the strip groove. A support block 15 is fixedly connected to the bottom of the support plate 6, and the bottom of the support block 15 fits in with the bottom groove wall of the groove;

[0031] When assembling the top steel member and the bottom steel member, first place the bottom steel member on the support plate 6 and in the position between the two clamping plates 5, then start the first motor 4 to drive the first screw 3 to rotate, and as the first screw 3 rotates, the two movable plates 2 can approach each other under the action of the first screw 3, and when one of the clamping plates 5 contacts the bottom steel member, the bottom steel member can approach the other clamping plate 5 along the top of the first roller 12 under the push of the clamping plate 5, and as the two clamping plates 5 continue to move, when the other clamping plate 5 also contacts the bottom steel member, the bottom steel member can be clamped under the action of the two clamping plates 5, and then the top steel member is placed vertically on the top of the bottom steel member, and the top steel member can be fixed by the clamping device 7, and the position of the top steel member can be adjusted by adjusting the position of the clamping device 7, thereby meeting the accuracy requirements when splicing the top steel member and the bottom steel member.

[0032] like Figures 1 to 5As shown, the clamping device 7 includes a U-shaped bracket 701, and the two bottom ends of the U-shaped bracket 701 are fixedly connected to a slider 702. A strip-shaped slide groove is provided on the top of the base 1 at the corresponding position of the slider 702. The slide groove is parallel to the front side of the base 1, and the slider 702 is slidably installed in the slide groove. A U-shaped clamping plate 703 is symmetrically provided on the inner side of the U-shaped bracket 701 near the front and rear sides, and the openings of the two U-shaped clamping plates 703 are opposite to each other. A fixing rod 704 is fixedly connected to the side where the two U-shaped clamping plates 703 are separated. A second screw 705 is inserted through a vertical thread between the two fixing rods 704. One side of the second screw 705 The end is rotatably connected to the inner wall of one side of the U-shaped bracket 701, and the other end of the second screw 705 is rotated to penetrate and plugged into the other side of the U-shaped bracket 701, and the second screw 705 is rotated to penetrate and plugged into one end of the U-shaped bracket 701 and is connected to the second motor 706. The two fixed rods 704 are vertically fixedly connected to the limiting rod 707 on the separated side, and the free end of the limiting rod 707 slides vertically and penetrates and is plugged into the U-shaped bracket 701. An electromagnet 708 is provided on the inner side of the U-shaped clamping plate 703, and the side of the electromagnet 708 opposite to the fixed rod 704 is designed with a slope, and the thickness of the electromagnet 708 gradually becomes thinner from top to bottom. The U-shaped card plate 703 and the side opposite to the electromagnet 708 are also designed with an inclined surface, and the two fit tightly. Both sides of the electromagnet 708 are fixedly connected with a bar-shaped limit block 709, and the limit block 709 is consistent with the inclination angle of the inclined surface of the electromagnet 708. The side of the U-shaped card plate 703 at the corresponding position of the limit block 709 is penetrated by a limit hole matching the limit block 709, and the limit block 709 is slidably installed in the corresponding limit hole. A telescopic rod 710 is fixedly connected between the top of the limit block 709 and the inner wall of the top of the limit hole. A spring 711 is sleeved on the telescopic rod 710. The U-shaped card plate 703 and the electromagnet 708 are fixedly connected. A receiving groove is provided on the side opposite to the inclined surface of the magnet 708. A plurality of second rollers 13 are rotatably connected between the groove walls on both sides of the receiving groove, and the second rollers 13 are tightly fitted with the inclined surface of the electromagnet 708. Anti-slip stripes are evenly provided on the side of the electromagnet 708 away from the fixed rod 704, and the anti-slip stripes are parallel to the top surface of the base 1. The front and rear sides of the U-shaped bracket 701 are fixedly connected to U-shaped handles 14, and the handles 14 are located in the lower half of the U-shaped bracket 701. The threads of the first screw 3 and the corresponding parts of the two movable plates 2, as well as the threads of the second screw 705 and the corresponding parts of the two fixed rods 704, are all designed in opposite directions.

[0033] When the top steel member is placed on the bottom steel member, the U-shaped bracket 701 is pulled by the handle 14 to move it along the slide groove toward the position of the top steel member. When the two U-shaped clamping plates 703 are respectively opposite to the front and rear sides of the top steel member, the second motor 706 is started. As the second motor 706 is started, the second screw 705 can drive the two U-shaped clamping plates 703 to approach the top steel member from the front and rear sides at the same time under the action of the second motor 706. When the front and rear sides of the top steel member are both stuck in the two U-shaped clamping plates 703 and contact the electromagnet 708, the second motor 706 continues to rotate for a while, so that the electromagnets 708 in the two U-shaped clamping plates 703 can continue to press against the top steel member.

[0034] The two electromagnets 708 are then started to be adsorbed together with the front and rear sides of the top steel member, thereby improving the stability of the U-shaped clamping plate 703 when fixing the top steel member, and thus improving the accuracy of the top and bottom steel members when splicing;

[0035] When the position of the top steel member needs to be adjusted, the second motor 706 is started again under the premise that the electromagnet 708 is energized, so that it drives the two U-shaped clamping plates 703 to further squeeze the front and rear sides of the top steel member through the second screw 705. During this process, the force of the oblique surface of the U-shaped clamping plate 703 on the oblique surface of the electromagnet 708 gradually increases. As the oblique surface force of the U-shaped clamping plate 703 on the oblique surface of the electromagnet 708 continues to increase, the two electromagnets 708 can drive the top steel member to move upward under the action of the U-shaped clamping plate 703 on its oblique surface thrust, so that the bottom of the top steel member can be separated from the bottom steel structure. In the process of the top steel member moving upward, as the electromagnet 708 moves along the U-shaped The inclined surface of the card plate 703 moves upward, and the second roller 13 can roll under the action of the friction force of the electromagnet 708, thereby converting the sliding friction between the electromagnet 708 and the U-shaped card plate 703 into rolling friction between the electromagnet 708 and the second roller 13, so that the electromagnet 708 can move upward smoothly. In addition, as the electromagnet 708 moves upward, the telescopic rod 710 and the spring 711 are gradually compressed by the limit block 709. When the top steel structure is separated from the bottom steel structure, the U-shaped bracket 701 can be pulled by the handle 14, so that the top steel structure can be adjusted in position under the drive of the U-shaped bracket 701, thereby improving the convenience of adjusting the position of the top steel structure.

[0036] When the position of the top steel structure is adjusted, the second motor 706 is rotated in the opposite direction. At this time, the two U-shaped clamps 5 can move in the direction of separation under the action of the second screw 705. As the two U-shaped clamps 703 move away from each other, the top steel structure can slowly move downward along the inclined surface of the U-shaped clamp 703 under the suction force of the electromagnet 708 and finally be pressed together with the bottom steel structure. The electromagnet 708 can maintain a certain pressure fit with the top steel structure under the action of the spring 711, thereby ensuring the stability of the fixation of the top steel structure. When the top steel structure and the bottom steel structure are pressed together, the top steel structure and the bottom steel structure after the adjustment can be spliced.

[0037] like Figures 1 to 3 As shown, the front and rear sides of the base 1 are provided with connecting holes matching the length of the slide groove at positions opposite to the slide groove, and a connecting plate 8 is inserted into the connecting hole, and the connecting plate 8 is fixedly connected to the corresponding slider 702. The side of the connecting plate 8 away from the slider 702 is fixedly connected to the sleeve 9, and fixed blocks are provided at both ends of the sleeve 9. The fixed block is vertically fixedly connected to the base 1, and an adjusting rod 10 matching the sleeve 9 is inserted into the internal thread of the sleeve 9, and the adjusting rod 10 and the sleeve 9 are respectively the screw rod and the shaft sleeve of the ball screw in the prior art. One end of the adjusting rod 10 is rotatably connected to the fixed block near the center of the base 1, and the other end of the adjusting rod 10 is vertically rotated and inserted into another fixed block, and the free end of the adjusting rod 10 is connected to a handwheel 11;

[0038] By providing an adjusting rod 10, when the position of the top steel member needs to be adjusted, as the second motor 706 is started, the second screw 705 drives the two U-shaped clamping plates 703 under the action of the second motor 706 to clamp the top steel member from the front and rear sides respectively. When the top steel member is separated from the bottom steel member under the lifting action of the electromagnet 708 inside the U-shaped clamping plate 703, the U-shaped bracket 701 can be pulled by the handle 14 first, so that it can move quickly along the direction of the slide groove. As the U-shaped bracket 701 moves, the U-shaped bracket 701 can drive the sleeve 9 to move together through the slider 702 and the connecting plate 8. As the sleeve 9 moves, the adjusting rod 10 can automatically rotate, so that the movement of the U-shaped bracket 701 is not affected.

[0039] When the U-shaped bracket 701 drives the top steel structure to move close to the specified installation position, the handwheel 11 can be used to drive the adjusting rod 10 to rotate, so that the U-shaped bracket 701 can drive the top steel structure to continue to be fine-tuned to the installation position under the force of the adjusting rod 10 on the sleeve 9, thereby improving the accuracy of assembly of the top steel structure and the bottom steel structure.

[0040] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A positioning device for assembling steel structural components, comprising a base (1), characterized in that: The base (1) is provided with a groove at the top, and movable plates (2) are symmetrically provided at both sides of the groove. The front and rear sides of the movable plates (2) are respectively slidably connected to the front and rear side groove walls of the groove. A first screw rod (3) is inserted through a vertical thread between the two movable plates (2). One end of the first screw rod (3) is vertically rotatably connected to the groove wall on one side of the groove. The other end of the first screw rod (3) is rotated and inserted into the groove wall on the other side of the groove. The end of the first screw rod (3) that is rotated and inserted into the groove wall on the other side of the groove is connected to a first motor (4). A clamping plate (5) is provided at the top of the movable plate (2). Two connecting blocks are fixedly connected between the clamping plate (5) and the movable plate (2). A support plate (6) is detachably installed at the top opening of the groove, and a strip-shaped through hole is inserted through the support plate (6) at a position opposite to the connecting block. Clamping devices (7) for fixing steel components are symmetrically provided near both sides of the top of the base (1). The clamping device (7) includes a U-shaped bracket (701), and the two bottom ends of the U-shaped bracket (701) are fixedly connected to a slider (702), and a strip-shaped slide groove is opened on the top of the base (1) at the position corresponding to the slider (702), and the slide groove is parallel to the front side of the base (1), and the slider (702) is slidably installed in the slide groove, and a U-shaped card plate (703) is symmetrically provided at the position near the front and rear sides of the inner side of the U-shaped bracket (701), and the openings of the two U-shaped card plates (703) are opposite to each other, and the two U-shaped card plates (703) are symmetrically provided. ) are fixedly connected to a fixed rod (704) on one side thereof, a second screw rod (705) is inserted through a vertical thread between the two fixed rods (704), one end of the second screw rod (705) is rotatably connected to the inner wall of one side of the U-shaped bracket (701), and the other end of the second screw rod (705) is rotatably inserted through the other side of the U-shaped bracket (701), and the second motor (706) is connected to one end of the second screw rod (705) that is rotatably inserted through the U-shaped bracket (701). The two fixed rods (704) are separated. One side of the U-shaped bracket (701) is vertically fixedly connected to a limiting rod (707), and the free end of the limiting rod (707) is vertically slid through and plugged into the U-shaped bracket (701). The inner side of the U-shaped bracket (703) is provided with an electromagnet (708), and the side of the electromagnet (708) opposite to the fixing rod (704) is designed as a bevel, and the thickness of the electromagnet (708) gradually becomes thinner from top to bottom. The side of the U-shaped bracket (703) opposite to the electromagnet (708) is also designed as a bevel, and the two are tightly fitted. The electromagnet (708) ) are fixedly connected to both sides of a strip-shaped limit block (709), and the limit block (709) and the inclined surface of the electromagnet (708) have the same inclination angle, and the side of the U-shaped card plate (703) at the corresponding position of the limit block (709) is penetrated by a limit hole matching the limit block (709), and the limit block (709) is slidably installed in the corresponding limit hole, and a telescopic rod (710) is fixedly connected between the top of the limit block (709) and the inner wall of the top of the limit hole, and a spring (711) is sleeved on the telescopic rod (710).

2. A positioning device for assembling steel structural members according to claim 1, characterized in that: The front and rear sides of the base (1) are provided with connection holes that match the length of the slide groove at positions opposite to the slide groove, and a connection plate (8) is inserted into the connection hole, and the connection plate (8) is fixedly connected to the corresponding slider (702). The side of the connection plate (8) away from the slider (702) is fixedly connected to the sleeve (9), and fixed blocks are provided at both ends of the sleeve (9), and the fixed block is vertically fixedly connected to the base (1). The internal thread of the sleeve (9) is inserted with an adjustment rod (10) that matches the sleeve (9), and the adjustment rod (10) and the sleeve (9) are respectively the screw rod and the shaft sleeve of the ball screw, and one end of the adjustment rod (10) is rotatably connected to the fixed block near the center of the base (1), and the other end of the adjustment rod (10) is vertically rotatably inserted into another fixed block, and the free end of the adjustment rod (10) is connected to a handwheel (11).

3. A positioning device for assembling steel structural members according to claim 2, characterized in that: The top of the support plate (6) is flush with the top of the base (1), and a plurality of strip grooves are provided on the top of the support plate (6) in parallel along the front-to-back direction. A first roller (12) is rotatably connected between the front and rear groove walls of the strip groove, and the top of the first roller (12) is located outside the strip groove.

4. A positioning device for assembling steel structural members according to claim 3, characterized in that: A receiving groove is provided on one side of the U-shaped clamping plate (703) opposite to the inclined surface of the electromagnet (708), and a plurality of second rollers (13) are rotatably connected between the groove walls on both sides of the receiving groove, and the second rollers (13) are tightly fitted to the inclined surface of the electromagnet (708).

5. A positioning device for assembling steel structural members according to claim 4, characterized in that: The side of the electromagnet (708) away from the fixed rod (704) is evenly provided with anti-slip stripes, and the anti-slip stripes are parallel to the top surface of the base (1).

6. A positioning device for assembling steel structural members according to claim 5, characterized in that: A U-shaped handle (14) is fixedly connected to the front and rear sides of the U-shaped bracket (701), and the handle (14) is located at the lower half of the U-shaped bracket (701).

7. A positioning device for assembling steel structural members according to claim 6, characterized in that: The threads of the first screw rod (3) and the parts corresponding to the two movable plates (2), and the threads of the second screw rod (705) and the parts corresponding to the two fixed rods (704) are all designed in opposite directions.

8. The positioning device for assembling steel structural members according to claim 7, characterized in that: A support block (15) is fixedly connected to the bottom of the support plate (6), and the bottom of the support block (15) is in contact with the bottom wall of the groove.

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