Special-shaped steel pipe cold bending forming machine

Abstract

The utility model discloses a special-shaped steel pipe cold bending forming machine, including the fixing frame, the top fixed connection of fixing frame has the mounting panel, the one side of mounting panel is provided with two second sliding slot and a third sliding slot, two the sliding connection of second sliding slot has same U -shaped support, and the both ends of U -shaped support are all through bearing swing joint with two pivot, and the one side of two pivot is all key connection has the supporting roller, the sliding block of sliding connection has in the third sliding slot. The utility model not only can adapt the cold bending demand of different size section bar without disassembling and replacing the roller set, effectively reduced the labor intensity of worker, shortened the downtime changeover time, and can guarantee the uniformity of pipe conveying speed, further optimized the forming effect, can also effectively prevent the metal scrap, oil dirt and other impurities generated in the cold bending process from entering the sliding slot inside, avoid the part jam or wear and tear, prolong the service life of equipment.

Description

Technical Field

[0001] This utility model relates to the field of special-shaped steel pipe technology, and in particular to a cold bending forming machine for special-shaped steel pipe. Background Technology

[0002] Special-shaped steel pipes generally refer to square steel pipes or steel pipes with other cross-sectional shapes. Cold bending forming refers to the process of applying a bending moment to a straight profile at room temperature through a forming die, causing it to undergo continuous plastic deformation, thereby obtaining a predetermined curvature and shape. In traditional special-shaped steel pipe cold bending forming machines, the square steel pipe is usually cold-bent by moving the pressure roller downwards.

[0003] However, a conventional set of roller molds is usually only suitable for profiles of a specific size. It is not suitable for profiles with different cross-sectional dimensions or bending radii. When changing products, it is often necessary to disassemble and replace the entire roller set or even the mold assembly, which increases the labor intensity of workers and downtime. In order to better address the above problems, save time and energy, and promote the development of industry technology and improve core competitiveness, this application proposes a new composition structure that is different from the existing technology. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies where the pressure roller structure cannot be adjusted when cold bending square steel pipes, and to propose a special-shaped steel pipe cold bending forming machine.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A cold bending forming machine for irregular steel pipes includes a fixed frame. A mounting plate is fixedly connected to the top of the fixed frame. Two second sliding grooves and one third sliding groove are formed on one side of the mounting plate. A U-shaped frame is slidably connected within the two second sliding grooves. Two rotating shafts are rotatably connected to both ends of the U-shaped frame via bearings. Support rollers are keyed to one side of each of the two rotating shafts. A slider is slidably connected within the third sliding groove. A pressure roller is rotatably connected to one side of the slider. A bidirectional threaded rod is provided on one side of the mounting plate, with one end of the bidirectional threaded rod passing through the slider and the U-shaped frame and threadedly connected to them. A first motor is fixedly connected to the top of the mounting plate, and one end of the output shaft of the first motor is connected to the bidirectional threaded rod via a coupling. A drive assembly for rotating the support rollers is provided on one side of the U-shaped frame.

[0006] As a further embodiment of this utility model, the drive assembly includes two second motors, which are fixedly connected to one side of the U-shaped frame. One end of the output shaft of each of the two second motors is connected to two rotating shafts via couplings, and the two second motors are independently controlled and have the same speed.

[0007] As a further embodiment of this utility model, a through groove is provided on one side of the mounting plate, and a first side roller is rotatably connected in the through groove.

[0008] As a further embodiment of this utility model, a fixing block is fixed to one side of the mounting plate by bolts, and a bidirectional threaded rod passes through the fixing block. Corrugated covers are fixedly connected between the top of the mounting plate and the top of the slider, between the bottom of the slider and the top of the fixing block, between the bottom of the fixing block and the top of the U-shaped frame, and between the bottom of the U-shaped frame and the bottom of the mounting plate.

[0009] As a further embodiment of this utility model, a first groove is provided on one side of the mounting plate, a slide frame is slidably connected in the first groove, and a second side roller is rotatably connected to the top of the slide frame.

[0010] As a further embodiment of this utility model, a self-locking cylinder is fixedly connected to the bottom of the mounting plate, and one end of the piston rod of the self-locking cylinder is fixed to the slide.

[0011] The beneficial effects of this utility model are as follows: 1. This utility model has a cooperative structure of a bidirectional threaded rod and a first motor. The first motor drives the bidirectional threaded rod to rotate, which can simultaneously drive the slider and the U-shaped frame to slide in the corresponding groove, realizing the synchronous adjustment of the relative position between the pressure roller and the support roller. It can adapt to the cold bending requirements of different sized profiles without disassembling and replacing the roller assembly, effectively reducing the labor intensity of workers and shortening the downtime for production changeover.

[0012] 2. This utility model is equipped with a drive assembly, which can drive two rotating shafts to rotate through two independently controlled second motors with the same speed, thereby driving the support rollers to rotate synchronously, providing stable and uniform forward power for the cold bending process of the profile, ensuring that the profile can be transported smoothly during the cold bending process, avoiding the profile from twisting or deforming due to inconsistent transport speed, and improving the quality of cold bending.

[0013] 3. This utility model is equipped with a second side roller, which is rotatably connected to one side of the mounting plate through a through groove. It can provide auxiliary support from the side during the cold bending forming of the special-shaped steel pipe, effectively limiting the horizontal displacement of the steel pipe. In cooperation with the support roller and the pressure roller, it further improves the stability of the pipe during cold bending and ensures that the cross-sectional shape of the special-shaped steel pipe after forming is more accurate. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a cold bending forming machine for irregularly shaped steel pipes proposed in this utility model; Figure 2 This is a schematic diagram of the back structure of a cold bending forming machine for irregular steel pipes proposed in this utility model; Figure 3This is a partial cross-sectional view of a cold bending forming machine for irregularly shaped steel pipes proposed in this utility model. Figure 4 This is a schematic diagram of the cold bending and forming structure of a special-shaped steel pipe cold bending forming machine proposed in this utility model. In the diagram: 1. Fixed frame; 4. Pressure roller; 5. First motor; 6. Mounting plate; 7. Through groove; 8. First side roller; 9. First slide groove; 10. Second slide groove; 11. Slide frame; 12. Support roller; 13. Self-locking cylinder; 14. Second side roller; 15. Corrugated cover; 16. Slider; 17. Third slide groove; 18. Fixed block; 19. Second motor; 20. U-shaped frame; 21. Bidirectional threaded rod. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. The described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0016] Reference Figures 1-4 A cold bending forming machine for special-shaped steel pipes includes a fixed frame 1. The top of the fixed frame 1 is fixed with a mounting plate 6 by bolts. Two second slide grooves 10 and a third slide groove 17 are opened on one side of the mounting plate 6. The same U-shaped frame 20 is slidably connected in the two second slide grooves 10. Two rotating shafts are rotatably connected to both ends of the U-shaped frame 20 by bearings. Support rollers 12 are keyed to one side of each of the two rotating shafts. One side of the U-shaped frame 20 is provided with a drive assembly for rotating the support roller 12. The drive assembly includes two second motors 19, which are fixed to one side of the U-shaped frame 20 by bolts. One end of the output shaft of each of the two second motors 19 is connected to two rotating shafts via couplings. The two second motors 19 are independently controlled and have the same speed. When in use, the second motors 19 are started, and the output shafts of the second motors 19 drive the rotating shafts connected to them to rotate, causing the two support rollers 12 to rotate and transport the steel pipe.

[0017] A slider 16 is slidably connected inside the third chute 17, and a pressure roller 4 is rotatably connected to one side of the slider 16. One side of the mounting plate 6 is provided with a bidirectional threaded rod 21 with a trapezoidal thread shape. One end of the bidirectional threaded rod 21 passes through the slider 16 and the U-shaped frame 20, and the bidirectional threaded rod 21 is threadedly connected to the slider 16 and the U-shaped frame 20. The top of the mounting plate 6 is fixed with the first motor 5 by bolts, and one end of the output shaft of the first motor 5 is connected to the bidirectional threaded rod 21 by a coupling. The first motor 5 is a self-locking geared motor, model 5IK120RGU-CF, and its output speed can be adjusted by an external controller. When in use, the first motor 5 is started, and its output shaft drives the bidirectional threaded rod 21 to rotate. Since the bidirectional threaded rod 21 is threadedly connected to the slider 16 and the U-shaped frame 20, under the action of thread transmission, the slider 16 and the U-shaped frame 20 will slide synchronously along their respective slides, thereby driving the pressure roller 4 and the support roller 12 to move, realizing the adjustment of their relative positions to adapt to the size of the pipe to be processed. It can adapt to the cold bending requirements of different sized profiles without disassembling and replacing the roller set, effectively reducing the labor intensity of workers and shortening the downtime for production changeover.

[0018] A fixing block 18 is fixed to one side of the mounting plate 6 by bolts, and the bidirectional threaded rod 21 passes through the fixing block 18 without contacting it. Corrugated covers 15 are fixed to the top of the mounting plate 6 and the top of the slider 16, the bottom of the slider 16 and the top of the fixing block 18, the bottom of the fixing block 18 and the top of the U-shaped frame 20, and the bottom of the U-shaped frame 20 and the bottom of the mounting plate 6 by bolts. The corrugated cover 15 extends and retracts as the slider 16 and U-shaped frame 20 move, always isolating the bidirectional threaded rod 21 from the external environment to prevent impurities from entering the slide groove. Furthermore, the compressed corrugated cover 15 will not come into contact with the bidirectional threaded rod 21 and will not affect its rotation.

[0019] In this utility model, a through groove 7 is provided on one side of the mounting plate 6, and a first side roller 8 is rotatably connected in the through groove 7. The first side roller 8 protrudes slightly from the through groove 7, which can prevent the irregular steel pipe from rubbing against the mounting plate 6, causing scratches on the surface of the steel pipe or the mounting plate 6. In particular, a first groove 9 is provided on one side of the mounting plate 6, a slide 11 is slidably connected in the first groove 9, a second side roller 14 is rotatably connected to the top of the slide 11, a self-locking cylinder 13 is fixed to the bottom of the mounting plate 6 by bolts, and one end of the piston rod of the self-locking cylinder 13 is fixed to the slide 11. The self-locking cylinder 13 is connected to an external air supply device. By adjusting the extension and retraction length of the piston rod of the self-locking cylinder 13, the slide 11 can be driven to slide up and down within the first slide groove 9, thereby adjusting the height position of the second side roller 14. This allows for auxiliary support from the side during the cold bending process of the special-shaped steel pipe, effectively limiting the horizontal displacement of the steel pipe, according to the size requirements of the special-shaped steel pipe. The second side roller 14 cooperates with the limiting ring on one side of the support roller 12 and the pressure roller 4 to limit and guide the steel pipe from different sides, ensuring the stability of the steel pipe during the cold bending process.

[0020] Working principle: When cold bending of square steel pipes of different sizes is required, the square steel pipes are passed through the gap between the support roller 12 and the pressure roller 4 in sequence. The first motor 5 is started, and its output shaft drives the bidirectional threaded rod 21 to rotate. Since the bidirectional threaded rod 21 is threadedly connected to the slider 16 and the U-shaped frame 20, and the slider 16 is located in the third slide groove 17 and the U-shaped frame 20 is located in the second slide groove 10, under the action of threaded transmission, the slider 16 and the U-shaped frame 20 will slide synchronously along their respective slide grooves, thereby driving the pressure roller 4 and the support roller 12 to move, realizing the adjustment of their relative positions to adapt to the size of the pipe to be processed. After adjustment, the second motor 19 is started. The output shaft of the second motor 19 drives the connected rotating shaft to rotate. The two support rollers 12 rotate simultaneously to transport the steel pipe. During the transport process, the square-shaped steel pipe is subjected to downward pressure by the pressure roller 4, and the two support rollers 12 apply upward pressure to the steel pipe. As a result, the steel pipe is bent and deformed under the combined action of the three pressures and the transport force, thus forming a steel pipe with a certain degree of curvature. This completes the cold bending operation and realizes the synchronous adjustment of the relative position between the pressure roller 4 and the support roller 12. It can adapt to the cold bending requirements of different sized profiles without disassembling and replacing the roller assembly, effectively reducing the labor intensity of workers and shortening the downtime for production changeover.

[0021] Furthermore, although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cold bending forming machine for irregularly shaped steel pipes, comprising a fixed frame (1), characterized in that, The top of the fixed frame (1) is fixedly connected to a mounting plate (6). Two second slide grooves (10) and a third slide groove (17) are opened on one side of the mounting plate (6). The same U-shaped frame (20) is slidably connected in the two second slide grooves (10). Two rotating shafts are rotatably connected to both ends of the U-shaped frame (20) through bearings. Support rollers (12) are keyed to one side of each of the two rotating shafts. A slider (16) is slidably connected in the third slide groove (17). One side of the slider (16) rotates... The mounting plate (6) is connected to a pressure roller (4). A bidirectional threaded rod (21) is provided on one side of the mounting plate (6). One end of the bidirectional threaded rod (21) passes through the slider (16) and the U-shaped frame (20) and is threadedly connected to the slider (16) and the U-shaped frame (20). A first motor (5) is fixedly connected to the top of the mounting plate (6). One end of the output shaft of the first motor (5) is connected to the bidirectional threaded rod (21) through a coupling. A drive assembly for rotating the support roller (12) is provided on one side of the U-shaped frame (20).

2. The special-shaped steel pipe cold bending forming machine according to claim 1, characterized in that, The drive assembly includes two second motors (19), which are fixed to one side of the U-shaped frame (20) by bolts. One end of the output shaft of each of the two second motors (19) is connected to two rotating shafts by couplings. The two second motors (19) are independently controlled and have the same speed.

3. The special-shaped steel pipe cold bending forming machine according to claim 1, characterized in that, A through groove (7) is provided on one side of the mounting plate (6), and a first side roller (8) is rotatably connected in the through groove (7).

4. The special-shaped steel pipe cold bending forming machine according to claim 3, characterized in that, A fixing block (18) is fixed to one side of the mounting plate (6) by bolts, and a bidirectional threaded rod (21) passes through the fixing block (18). Corrugated covers (15) are fixedly connected between the top of the mounting plate (6) and the top of the slider (16), between the bottom of the slider (16) and the top of the fixing block (18), between the bottom of the fixing block (18) and the top of the U-shaped frame (20), and between the bottom of the U-shaped frame (20) and the bottom of the mounting plate (6).

5. A special-shaped steel pipe cold bending forming machine according to claim 4, characterized in that, The mounting plate (6) has a first groove (9) on one side, a slide frame (11) is slidably connected in the first groove (9), and a second side roller (14) is rotatably connected to the top of the slide frame (11).

6. The special-shaped steel pipe cold bending forming machine according to claim 1, characterized in that, The bottom of the mounting plate (6) is fixedly connected to a self-locking cylinder (13), and one end of the piston rod of the self-locking cylinder (13) is fixed to the slide (11).

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