A device for bending a profiled steel

Abstract

This invention relates to the field of steel section bending technology and discloses a steel section bending processing device, comprising several roller assemblies: each roller assembly includes a prism shaft and two roller groups located on the upper and lower outer sides of the prism shaft, respectively; the upper roller group is vertically adjustable along the position of the prism shaft; each roller group includes an outer roller that fits against the outer side of the H-beam flange, an inner roller that fits against the side of the H-beam web, and a stepped wheel that abuts against the edge of the H-beam flange; the outer roller is connected to the prism shaft, and there is a vertical gap between the inner roller and the outer roller; the stepped wheel is located inside the outer roller and the inner roller; the position of the stepped wheel is vertically adjustable so that the vertical gap between the inner roller and the outer roller corresponds to different positions of the stepped wheel; this invention can bend H-beams of different specifications, with the inner roller acting directly on the web; through the vertically adjustable stepped wheel, it can contact the flanges of H-beams of different specifications, directly causing the flanges to bend, thereby improving the bending quality of the H-beam.

Description

Technical Field

[0001] This invention relates to the field of steel bending technology, and more specifically to a steel bending processing device. Background Technology

[0002] Steel section bending is a processing technique that uses external force to cause plastic deformation in steel sections, thereby forming a specific curvature or angle. Based on the bending form and process characteristics, steel section bending mainly includes cold bending and hot bending.

[0003] H-beams are frequently used in tunnel, subway, and underground cavern construction projects to form support arches. In these projects, the bending of H-beams is primarily achieved using cold bending machines.

[0004] Cold bending machines typically use rollers or molds to apply external force to metal materials, causing them to undergo plastic deformation and thus achieve bending. Specifically, a motor drives the active roller to rotate via a reducer, while the passive roller can be adjusted as needed. The metal material passes between the rollers, gradually bending under the pressure and friction of the rollers. For example, patent document CN107262572B describes a CNC I-beam cold bending machine.

[0005] Patent document CN115365347B discloses a steel profile bending machine, and patent document CN119525328B discloses a continuous forming bending machine for H-beams. Both can bend various types of H-beams by adjusting the rollers, limiting the bending area and ensuring flatness. However, their roller structure only acts on the web of the H-beam and cannot directly provide effective support for the bending of the flanges. When bending the H-beam, the bending of the web forces the flanges to bend. Although the bending process limits the flange position, it results in high stress at the connection between the web and flange after bending, which is detrimental to the flatness. The former's limiting component is mainly used to limit the upper and lower parts of the flange, while the latter's threaded structure cannot limit the edge of the flange; if it comes into contact with the flange edge, it will damage the threaded structure. Summary of the Invention

[0006] The purpose of this invention is to provide a steel bending processing device in order to solve at least one of the problems in the prior art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A steel section bending processing device includes several roller assemblies: the roller assembly includes a prism shaft and two roller groups located on the upper outer side and lower outer side of the prism shaft respectively, and the upper roller group is vertically adjustable along the position of the prism shaft;

[0009] The roller assembly includes an outer roller that fits against the outer side of the H-beam flange, an inner roller that fits against the side of the H-beam web, and a stepped roller that abuts against the edge of the H-beam flange.

[0010] The outer roller is connected to the prism shaft, and there is a vertical gap between the inner roller and the outer roller. The stepped wheel is located inside the outer roller and the inner roller. The position of the stepped wheel is vertically adjusted so that the vertical gap between the inner roller and the outer roller corresponds to different positions of the stepped wheel.

[0011] Furthermore, the upper part of the prism shaft is provided with a vertical rack; the upper side of the outer roller of the roller assembly at the upper part of the prism shaft is connected to a prism cylinder sleeved on the outside of the prism shaft, and the inner side of the prism cylinder is horizontally slidably connected to a tooth block that meshes with the rack; the prism cylinder is threaded with a bolt that is rotatably connected to the tooth block.

[0012] Furthermore, the outer roller and the inner roller are provided with receiving grooves on opposite sides for the movement of the stepped wheel; a vertical first spring is provided between the stepped wheel and the outer roller; the inner ring side of the outer roller is provided with several layers of reverse teeth, and the outer ring side of the stepped wheel is provided with a pawl that engages with the reverse teeth.

[0013] Furthermore, a guide rod that slides through the inner roller is connected to one side of the stepped wheel, and a drive ring is connected to the outer end of the guide rod.

[0014] Furthermore, the outer roller has a plurality of first grooves on the side wall of the receiving groove, a vertical positioning block is provided in the inner half of the first groove, a second groove is provided on the side of the positioning block, the second groove extends to the side of the positioning block facing the inner roller, and a chamfer is provided on the side of the positioning block facing the inner roller corresponding to the second groove; the chamfered tooth is located in the second groove, and the outer end of the chamfered tooth has a lateral gap with the groove opening of the second groove; the end of the second groove away from the inner roller has a slope.

[0015] Furthermore, the pawl is rotatably connected to the stepped wheel, and telescopic columns are slidably connected to both sides of the end of the pawl. A second spring is connected between the telescopic columns and the pawl.

[0016] Furthermore, the pawl is in an inclined state, and a hinge seat supporting the pawl is provided on the outer side of the stepped wheel. A torsion spring is provided between the hinge seat and the pawl to flip the end of the pawl. A stop bar is provided on the hinge seat to prevent the end of the pawl from flipping. A third groove is provided on both sides of the end of the pawl to accommodate the telescopic column.

[0017] Furthermore, the positioning block is vertically slidably connected within the first groove; the inner roller is internally connected to a central cylinder sleeved on the outside of the prism shaft, and the central cylinder is connected to the positioning block via a connecting rod.

[0018] Furthermore, the positioning block has a threaded strip-shaped protrusion on one side, and an internal threaded ring that meshes with the thread of the strip-shaped protrusion is rotatably provided inside the outer roller. A gear ring is provided on one side of the internal threaded ring, and a gear that meshes with the gear ring is rotatably installed inside the outer roller.

[0019] Furthermore, the first groove has a fourth groove that mates with the strip-shaped protrusion on its inner side; the outer roller has an annular cavity for the inner threaded ring to rotate, and the annular cavity is connected to the fourth groove.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] This invention can bend H-beams of different specifications. The inner rollers act directly on the web. Through the vertically adjustable stepped rollers, they can contact the flanges of H-beams of different specifications and directly cause the flanges to bend, thereby improving the bending quality of H-beams.

[0022] This invention employs a double roller assembly structure, which acts on the two flanges of the H-beam and the connection between them and the web. By adjusting the spacing of the roller assemblies, it can be matched with H-beams of different cross-sectional spans.

[0023] The roller assembly of this invention consists of an outer roller, an inner roller, and a built-in stepped roller with vertically adjustable position. By changing the position of the stepped roller, the vertical gap between the outer and inner rollers at different outer diameters of the stepped roller can be adjusted, thereby allowing it to contact the edge of the flange of H-beams of various specifications, adapting to flanges of different widths, and directly applying force to the flange to promote stable bending of the flange, rather than bending under the influence of the web bending.

[0024] This invention adjusts the height of the positioning block by adjusting the height of the inner roller through the internal threaded ring, thereby adjusting the vertical gap between the outer roller and the inner roller; thus, it can adapt to flange plates of different thicknesses, limit the upper and lower sides of the flange plate, and ensure the flatness of the flange plate when bending.

[0025] The reverse teeth of this invention are combined with the positioning block. When the height of the inner roller is finely adjusted, the pawl causes the stepped wheel to move vertically synchronously without changing the outer diameter of the stepped wheel.

[0026] This invention achieves multi-level adjustment of the height of a stepped wheel through the cooperation of multiple layers of countersunk teeth and pawls. With the cooperation of the first spring, the stepped wheel can move vertically in the forward direction and separate from the countersunk teeth through the cooperation of the telescopic column of the pawl with the inclined surface and the second groove, and then move vertically in the reverse direction to reset. The chamfering causes the elastic telescopic column to retract, and the forward vertical movement of the pawl can cooperate with the multiple layers of countersunk teeth step by step to achieve the positioning of the stepped wheel at different vertical positions. Attached Figure Description

[0027] Figure 1 This is a first-view three-dimensional structural diagram of the present invention.

[0028] Figure 2 This is a second-view three-dimensional structural diagram of the present invention.

[0029] Figure 3This is a schematic diagram of the fixed wheel frame structure of the present invention.

[0030] Figure 4 This is a side view of the roller assembly of the present invention.

[0031] Figure 5 This is a cross-sectional schematic diagram of the roller assembly of the present invention.

[0032] Figure 6 This is a schematic diagram of the rack of the present invention.

[0033] Figure 7 This is a schematic diagram of the outer roller of the upper roller assembly of the present invention.

[0034] Figure 8 This is a schematic cross-sectional view of the lower roller assembly of the present invention.

[0035] Figure 9 This is a three-dimensional cross-sectional view of the lower roller assembly of the present invention.

[0036] Figure 10 This is a three-dimensional schematic diagram of the outer roller of the present invention.

[0037] Figure 11 This is a three-dimensional cross-sectional view of the outer roller of the present invention.

[0038] Figure 12 This is a first-view perspective three-dimensional schematic diagram of the inner roller and positioning block of the present invention.

[0039] Figure 13 This is a second-view perspective three-dimensional schematic diagram of the inner roller and positioning block of the present invention.

[0040] Figure 14 This is a schematic diagram of the internal threaded ring and its connection structure according to the present invention.

[0041] Figure 15 This is a first-view perspective three-dimensional schematic diagram of the stepped wheel of the present invention.

[0042] Figure 16 This is a two-dimensional schematic diagram of the stepped wheel of the present invention from a second perspective.

[0043] Figure 17 This is a schematic diagram of the ratchet and its connection structure according to the present invention.

[0044] In the diagram: 1. Platform; 2. Support frame; 3. Fixed wheel frame; 4. Motor; 5. Movable wheel frame; 6. Track; 7. Hydraulic cylinder; 8. Roller assembly; 9. Prism shaft; 10. Roller group; 11. Rack; 12. Prism cylinder; 13. Gear block; 14. Bolt; 15. Outer roller; 16. Inner roller; 17. Stepped wheel; 18. Central cylinder; 19. Receiving groove; 20. Positioning block; 21. Connecting rod; 22. First groove; 23. Fifth groove; 24. Dovetail strip; 25. Dovetail groove; 26. Strip 27. Protrusion; 28. Internal threaded ring; 29. ​​Annular cavity; 30. Gear ring; 31. Gear shaft; 32. Internal hexagon head; 33. Sixth groove; 34. First spring; 35. Spring groove; 36. Guide rod; 37. Guide hole; 38. Drive ring; 39. Reverse tooth; 40. Pawl; 41. Second groove; 42. Inclined surface; 43. Fourth groove; 44. Chamfer; 45. Hinge seat; 46. Torsion spring; 47. Stop lever; 48. Third groove; 49. Telescopic column; 50. Second spring. Detailed Implementation

[0045] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention; that is, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0046] Specific embodiments of the steel bending processing device provided by the present invention:

[0047] Please refer to the attached document. Figures 1-17 The steel bending processing device includes a frame 1 and several roller assemblies 8. Support legs are welded to the lower sides of the four corners of the frame 1. Two fixed wheel frames 3 are symmetrically installed on the upper side of the frame 1. Each fixed wheel frame 3 supports the rotation of a roller assembly 8. A reducer and a motor 4 for driving the roller assembly 8 are installed on the upper side of the fixed wheel frame 3.

[0048] The fixed wheel frame 3 includes a base plate, an arc plate, and a top plate. The base plate is connected to the frame 1, and the arc plate partially surrounds the outside of the roller assembly 8 to form an outer protection. The reducer is installed on the upper side of the top plate, and the motor 4 is installed on the upper side of the reducer.

[0049] Motor 4 causes roller assembly 8 to rotate, roller assembly 8 fits against H-beam and drives H-beam through the steel bending processing device.

[0050] A support frame 2 is installed on the upper side of the platform 1. There are four support frames 2 in total, arranged in pairs, with two in each pair, located on both sides of the fixed wheel frame 3. The support frame 2 includes two parallel horizontally arranged rollers, wherein at least the upper roller is height-adjustable. The support frame 2 is prior art and will not be described in detail in this embodiment.

[0051] A movable wheel frame 5 is provided on the upper middle part of the platform 1. The movable wheel frame 5 has a U-shaped plate structure, and a roller assembly 8 is installed on the inner side of the movable wheel frame 5. A track 6 is provided on the upper middle part of the platform 1, and the movable wheel frame 5 moves along the track 6. A hydraulic cylinder 7 is also installed on the upper middle part of the platform 1. The telescopic end of the hydraulic cylinder 7 is connected to the movable wheel frame 5, driving the movable wheel frame 5 to move along the track 6.

[0052] The hydraulic cylinder 7 drives the movable wheel frame 5 to move, so that the H-beam passes through the steel bending processing device with different curvatures, thereby realizing the bending processing of the H-beam with different curvatures.

[0053] The roller assembly 8 includes a prism 9 and two roller groups 10 located on the upper outer side and lower outer side of the prism 9, respectively. In this embodiment, the upper roller group 10 is vertically adjustable along the position of the prism 9. In other embodiments, the vertical positions of the two roller groups 10 of the roller assembly 8 can be adjusted along the prism 9.

[0054] The roller assembly 10 is used to limit the connection between the web end and the flange plate on one side and the flange plate on that side. The two roller assemblies 10 correspond to the two ends of the web and the flange plates at both ends, respectively. The height of the upper roller assembly 10 can be adjusted, so as to adjust the distance between the two roller assemblies 10, thereby enabling the adaptation and bending of H-beams of different specifications.

[0055] In this embodiment, the prism shaft 9 adopts a relatively stable hexagonal prism structure. A round shaft is connected to the end of the prism shaft 9, which is used to cooperate with the bearing, so that the fixed wheel frame 3 and the movable wheel frame 5 can support the rotation of the prism shaft 9 and the roller assembly 10 through the bearing.

[0056] The upper side of the circular shaft of the roller assembly 8 on the fixed wheel frame 3 is provided with a keyway. It is connected to the reducer and motor 4 through the keyway and coupling, and rotates with the output of the motor 4 and the reducer.

[0057] The roller assembly 10 includes an outer roller 15 that fits against the outer side of the H-beam flange, an inner roller 16 that fits against the side of the H-beam web, and a stepped roller 17 that abuts against the edge of the H-beam flange. The outer roller 15 is connected to the prism shaft 9, either in a fixed or adjustable manner. There is a vertical gap between the inner roller 16 and the outer roller 15. The stepped roller 17 is located inside the outer roller 15 and the inner roller 16. The position of the stepped roller 17 can be vertically adjusted so that the vertical gap between the inner roller 16 and the outer roller 15 corresponds to different positions of the stepped roller 17.

[0058] The upper three sides of the prism shaft 9 are provided with vertical racks 11; the upper side of the outer roller 15 of the roller assembly 10 on the upper part of the prism shaft 9 is connected to a prism cylinder 12 sleeved on the outside of the prism shaft 9. The outer roller 15 has a hexagonal through hole in the center for the prism shaft 9 to pass through. The prism cylinder 12 is a hexagonal cylindrical structure that fits against the outside of the prism shaft 9 and can slide vertically. The inner side of the prism cylinder 12 is provided with three sliding grooves, which are located on the three side walls of the prism cylinder 12 and correspond to the racks 11. The racks 13 are horizontally slidably connected to the racks 11 in each sliding groove; the side walls of the prism cylinder 12 are threaded with bolts 14 that are rotatably connected to the racks 13. The racks 13 are limited by the sliding grooves and can only move linearly along the sliding grooves. Rotating the bolts 14 can make the cylindrical part of the bolts 14 pass through the side walls of the prism cylinder 12. The inner end of the bolts 14 is rotatably connected to the racks 13. The linear sliding of the racks 13 does not affect the rotation of the bolts 14. Bolt 14 controls the sliding of tooth block 13. When tooth block 13 extends out of the slide groove, the teeth of tooth block 13 extend into the space between the rack 11 to form a vertical positioning. When tooth block 13 retracts into the slide groove, the upper roller assembly 10 and the prism cylinder 12 can move vertically together along the prism axis 9.

[0059] In this embodiment, the outer roller 15 of the lower roller assembly 10 of the prism shaft 9 is fixedly connected to the prism shaft 9. Therefore, the lower side of the outer roller 15 is not connected to the prism cylinder 12, and the lower part of the prism shaft 9 is not provided with a rack 11.

[0060] The stepped wheel 17 comprises at least three sections with different outer diameters. Preferably, the outer diameters of the stepped wheel 17 increase or decrease sequentially along the vertical direction. In this embodiment, the stepped wheel 17 comprises four sections with different outer diameters. The outermost section with the largest outer diameter is connected to the vertical positioning structure of the stepped wheel 17 and does not correspond to the vertical gap between the outer roller 15 and the inner roller 16, and is not used to contact the flange plate. The other three sections can sequentially correspond to the gap between the outer roller 15 and the inner roller 16, and can contact H-beams with three different flange plate widths.

[0061] During the bending process of H-beams, the stepped wheel 17 contacts the edge of the flange plate and applies force directly to the flange plate, causing the flange plate to bend. Compared with the existing technology, which only bends the web plate and drives the flange plate to bend, this can reduce the stress at the connection between the web plate and the flange plate of the H-beam after bending, improve the bending quality of the H-beam, reduce the interaction force between the web plate and the flange plate during bending, and reduce the damage rate of the H-beam.

[0062] Both the outer roller 15 and the inner roller 16 have circular receiving grooves 19 on opposite sides for the movement of the stepped roller 17; the prism shaft 9 passes through the center of the outer roller 15, and the lower wall of the outer roller 15 of the lower roller assembly 10 is directly connected to the prism shaft 9. The upper wall of the outer roller 15 of the upper roller assembly 10 is vertically adjusted and positioned outside the prism shaft 9 by means of toothed blocks 13 and racks 11.

[0063] The inner roller 16 has a hexagonal through hole at its center for the prism shaft 9 to pass through, and the inner roller 16 can move vertically along the prism shaft 9. A central cylinder 18 is connected to the receiving groove 19 of the inner roller 16, facing the outer roller 15. The central cylinder 18 has a hexagonal through hole on its inner side and is fitted onto the outer side of the prism shaft 9. The central cylinder 18 is integrally connected to the inner roller 16 and can move vertically outside the prism shaft 9. The outer side of the central cylinder 18 is cylindrical.

[0064] The stepped wheel 17 is fitted onto the outside of the central tube 18. The stepped wheel 17 has a circular through hole in its center and can move vertically along the outside of the central tube 18. The inner side of the stepped wheel 17 contacts the central tube 18 and can withstand greater bending resistance of the flange.

[0065] A guide rod 36, which slides through the inner roller 16, is vertically connected to the side of the stepped roller 17 facing away from the outer roller 15. The guide rods 36 are evenly distributed around the circumference, and the center wall of the inner roller 16 has a guide hole 37 for the guide rods 36 to slide through. A drive ring 38 is connected to the outer end of the guide rod 36. The drive ring 38 surrounds the prismatic shaft 9, and there is an annular gap between the inner ring side and the prismatic shaft 9. In this way, when the hexagonal prismatic shaft 9 rotates, it can drive the outer roller 15 and the inner roller 16 to rotate. The hexagonal structure can withstand greater resistance, achieving stable rotation to bend and deform the H-beam and move the H-beam through the steel bending processing device.

[0066] The inner roller 16 rotates, causing the stepped wheel 17 to rotate synchronously via the guide hole 37 and the guide rod 36. In the non-working state where the roller assembly 10 is not rotating, the guide rod 36 can be moved along the guide hole 37 by moving the drive ring 38, thus adjusting the vertical position of the stepped wheel 17 to correspond to the vertical gap between the outer roller 15 and the inner roller 16 for different outer diameter sections. Simultaneously, in the roller assembly 10 structure, the vertical position of the inner roller 16 is also adjustable, allowing it to cooperate with the outer roller 15 to fit against the two sides of flanges of different thicknesses, thus limiting the flanges of different thicknesses and ensuring the flatness of the flanges during bending.

[0067] The stepped wheel 17 has a spring groove 35 extending towards the inner roller 16 at the center of its side facing the outer roller 15. A first spring 34, which is a helical spring, is connected to the bottom of the spring groove 35. The other end of the first spring 34 abuts against the bottom of the receiving groove 19 of the outer roller 15. The first spring 34, which is vertically arranged between the stepped wheel 17 and the outer roller 15, causes the stepped wheel 17 to move into the receiving groove 19 of the inner roller 16. Pressing the drive ring 38 from the outside can overcome the elastic force of the first spring 34 and cause the stepped wheel 17 to move towards the inner side of the outer roller 15.

[0068] The outer roller 15 has four vertical first grooves 22 on the side wall of the receiving groove 19. The first grooves 22 are evenly distributed around the circumference. The inner half of the first groove 22 has a vertical positioning block 20, that is, the side of the positioning block 20 facing the center of the receiving groove 19 is at a distance from the opening of the first groove 22. The side of the positioning block 20 facing the center of the receiving groove 19 has a second groove 41. The second groove 41 extends to the side of the positioning block 20 facing the inner roller 16. The side of the positioning block 20 facing the inner roller 16 has chamfers 44 on the two opposite side walls of the second groove 41. Each end of the second groove 41 has two opposite chamfers 44.

[0069] The inner ring side of the outer roller 15 is provided with three layers of reverse teeth 39. The reverse teeth 39 are located in the second groove 41, and each second groove 41 has three reverse teeth 39, which are arranged vertically in three layers. The cross-section of the reverse teeth 39 is a right-angled triangle, with the first right-angled side vertically connected to the inner wall of the second groove 41, the second right-angled side facing the bottom of the receiving groove 19 of the outer roller 15 and in a horizontal state, and the hypotenuse facing the inner roller 16. The outer end of the reverse teeth 39, that is, the part of the reverse teeth 39 near the opening of the first groove 22, has a lateral gap with the opening of the second groove 41; the end of the second groove 41 away from the inner roller 16 is provided with a slope 42.

[0070] The outer ring side of the stepped wheel 17 is provided with a pawl 40 that cooperates with the reverse tooth 39. The pawl 40 is a plate-shaped structure, and there are four pawls 40, which are evenly distributed on the outer side of the large end of the stepped wheel 17 and correspond to the four positioning blocks 20 respectively.

[0071] See Figure 8 , Figure 9 and Figure 17 The lower roller assembly 10 is configured with a pawl 40 rotatably connected to a stepped wheel 17. The pawl 40 is tilted, and a hinge seat 45 supporting the pawl 40 is provided on the outer side of the stepped wheel 17. A torsion spring 46 is provided between the hinge seat 45 and the pawl 40 to flip the end of the pawl 40. A stop bar 47 is provided on the hinge seat 45 to prevent the end of the pawl 40 from flipping. With the cooperation of the torsion spring 46 and the stop bar 47, the pawl 40 is tilted with its end pointing upwards, and in this state, the pawl 40 extends into the underside of the reverse tooth 39. When the pawl 40 moves downwards above the reverse tooth 39, the reverse tooth 39 causes the end of the pawl 40 to rotate towards the stepped wheel 17. After moving downwards past the reverse tooth 39, the reverse tooth 39 restricts the upward movement of the pawl 40. The upper end of the pawl 40 is the end of the pawl 40 away from the stepped wheel 17, that is, the end of the pawl 40 away from its hinge point.

[0072] The pawl 40 has telescopic posts 49 slidably connected to both sides of its end. The pawl 40 has third grooves 48 on both sides of its end to accommodate the telescopic posts 49, and the telescopic posts 49 slide along the inner side of the third grooves 48. A second spring 50 is connected between the telescopic posts 49 and the pawl 40. The second spring 50 is a helical spring and is connected between the telescopic posts 49 and the inner end of the third grooves 48.

[0073] When no external force is applied, the second spring 50 causes the telescopic column 49 to partially extend out of the third groove 48. Pressing the telescopic column 49 from the outside inwards will press the telescopic column 49 into the third groove 48.

[0074] The positioning block 20 with reverse teeth 39 can achieve different height positioning of the stepped wheel 17; in the above, the first spring 34 causes the stepped wheel 17 to move inward to the inner side of the inner roller 16, and the stepped wheel 17 can compress the first spring 34 and move outward to the outer roller 15 by pressing the drive ring 38.

[0075] In the non-working state, i.e., when the roller assembly 8 is not rotating, adjust the vertical position of the stepped wheel 17. Similarly, Figure 8 , Figure 9 and Figure 17 Taking the state and orientation of the roller assembly 10 at the lower part of the prism 9 as an example, by pressing down the drive ring 38, the stepped wheel 17 moves inward to the inner side of the outer roller 15, the pawl 40 moves down, and the inclined edge of the lower reverse tooth 39 causes the pawl 40 to overcome the elastic force of the torsion spring 46 and flip over. The end of the pawl 40 passes over the reverse tooth 39 and reaches the lower side of the lower reverse tooth 39, realizing positioning adjustment. During the process of passing over the reverse tooth 39, the telescopic column 49 corresponds to the second groove 41 and cannot extend. In this step-by-step downward movement, the stepped wheel 17 can be located at different heights, so that the different outer diameters of the stepped wheel 17 correspond to the vertical gaps of the outer roller 15 and the inner roller 16. Each time the pawl 40 descends one layer and engages with the next layer of reverse tooth 39, the vertical movement distance of the stepped wheel 17 is exactly the axial distance of one outer diameter segment. To reset the stepped wheel 17, continue pressing it downwards until the pawl 40 engages with the inclined surface 42. The inclined surface 42 causes the end of the pawl 40 to move out of the second groove 41. The telescopic post 49 extends under the action of the second spring 50. The telescopic posts 49 on both sides of the end of the pawl 40 extend out, wider than the width of the second groove 41, and cannot enter the second groove 41. The first spring 34 causes the stepped wheel 17 to rise and reset. During this process, the telescopic post 49 at the end of the pawl 40 moves upwards along the positioning block 20 in the first groove 22 toward the side of the prism 9. When the end of the pawl 40 exceeds the positioning block 20, the torsion spring 46 causes the end of the pawl 40 to flip to the upper side of the positioning block 20, with the telescopic post 49 corresponding to the chamfer 44. When the stepped wheel 17 is to be moved down again, the chamfer 44 causes the telescopic column 49 to compress the second spring 50 and retract. The end of the pawl 40 can then descend step by step inside the second groove 41. Each chamfer 39 restricts the stepped wheel 17 from moving upward, and the first spring 34 causes the stepped wheel 17 to move upward. The bidirectional restriction forms a vertical positioning.

[0076] The positioning block 20 is vertically slidably connected in the first groove 22. The first groove 22 is provided with a vertical dovetail strip 24. The side of the positioning block 20 is provided with a vertical dovetail groove 25. The dovetail groove 25 cooperates with the dovetail strip 24 to make the positioning block 20 move vertically. The central cylinder 18 is connected to each positioning block 20 through connecting rods 21. There are four connecting rods 21 in the roller assembly 10. The bottom of the receiving groove 19 of the outer roller 15 is provided with four fifth grooves 23 for the connecting rods 21 to rise and fall. The connecting rods 21 rise and fall in the fifth grooves 23 without affecting the contact between the first spring 34 and the bottom of the receiving groove 19 of the outer roller 15.

[0077] The positioning block 20 has a threaded strip-shaped protrusion 26 on the side facing away from the prism 9. The thread on the side of the strip-shaped protrusion 26 consists of several inclined parallel protrusions that are close to the transverse direction. The inner side of the first groove 22 has a fourth groove 43 that mates with the strip-shaped protrusion 26. The strip-shaped protrusion 26 extends into the fourth groove 43, and the fourth groove 43 restricts the positioning block 20 and the strip-shaped protrusion 26 from disengaging from the first groove 22.

[0078] The outer roller 15 is provided with an internal threaded ring 27 that engages with the thread of the strip-shaped protrusion 26. The outer roller 15 is provided with an annular cavity 28 for the internal threaded ring 27 to rotate. The cross section of the annular cavity 28 is L-shaped, and the cross section of the internal threaded ring 27 is also L-shaped. The internal threaded ring 27 rotates in the annular cavity 28, and the annular cavity 28 supports the rotation of the internal threaded ring 27. The annular cavity 28 is connected to each of the fourth grooves 43.

[0079] The internal thread of the internal threaded ring 27 engages with the thread on the strip-shaped protrusion 26. When the internal threaded ring 27 rotates, the strip-shaped protrusion 26 and the positioning block 20 rise or fall along the dovetail bar 24.

[0080] A gear ring 29 is provided on one side of the internal threaded ring 27. A gear 30 that meshes with the gear ring 29 is rotatably mounted inside the outer roller 15. The gear 30 is connected to a wheel axle 31, and an internal hexagon head 32 is connected to the outer end of the wheel axle 31. A radially extending sixth groove 33 is provided on the outer ring side of the outer roller 15. The sixth groove 33 is a cylindrical groove with an I-shaped cross-section, which is larger at both ends and smaller in the middle. The inner end of the sixth groove 33 communicates with the annular cavity 28 and accommodates the gear 30 that meshes with the gear ring 29. The middle part of the sixth groove 33 supports the rotation of the wheel axle 31, and the outside of the sixth groove 33 allows the internal hexagon head 32 to rotate, preventing the internal hexagon head 32 from protruding outside the outer roller 15.

[0081] By rotating the internal hexagon head 32, the axle 31 and gear 30 are rotated, which in turn rotates the gear ring 29 and the internal threaded ring 27. The rotation of the internal threaded ring 27 causes the four positioning blocks 20 to rise and fall. Since the internal threaded ring 27 has a small thread inclination and a large inner diameter, this transmission structure has a reverse transmission self-locking function, which can prevent the internal threaded ring 27 from rotating by driving the positioning blocks 20 to rise and fall. The positioning blocks 20 can only rise and fall by rotating the internal threaded ring 27. This can prevent the internal roller 16 from being subjected to force and causing the positioning block 20 to change position.

[0082] When the positioning block 20 is raised or lowered, the connecting rod 21 drives the central cylinder 18 and the inner roller 16 to move vertically, thereby fine-tuning the vertical gap between the inner roller 16 and the outer roller 15 to adapt to H-beams with different flange thicknesses. Furthermore, while fine-tuning the vertical gap between the inner roller 16 and the outer roller 15, the position of the positioning block 20 changes, allowing for simultaneous adjustment of the position of the stepped wheel 17. This keeps the positions of the stepped wheel 17 and the inner roller 16 relatively constant, enabling independent adjustment and adaptation for flange thickness and width.

[0083] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A steel section bending processing device, comprising several roller assemblies (8): characterized in that, The roller assembly (8) includes a prism shaft (9) and two roller groups (10) located on the upper outer side and the lower outer side of the prism shaft (9), respectively. The upper roller group (10) is vertically adjustable along the position of the prism shaft (9). The roller assembly (10) includes an outer roller (15) that fits against the outer side of the H-beam flange, an inner roller (16) that fits against the side of the H-beam web, and a stepped roller (17) that abuts against the edge of the H-beam flange. The outer roller (15) is connected to the prism shaft (9), and there is a vertical gap between the inner roller (16) and the outer roller (15). The stepped wheel (17) is located inside the outer roller (15) and the inner roller (16). The position of the stepped wheel (17) is vertically adjusted so that the vertical gap between the inner roller (16) and the outer roller (15) corresponds to different positions of the stepped wheel (17). The outer roller (15) and inner roller (16) are provided with receiving grooves (19) on opposite sides for the movement of the stepped wheel (17); a vertical first spring (34) is provided between the stepped wheel (17) and the outer roller (15); the inner ring side of the outer roller (15) is provided with several layers of reverse teeth (39), and the outer ring side of the stepped wheel (17) is provided with a pawl (40) that cooperates with the reverse teeth (39); The outer roller (15) has a plurality of first grooves (22) on the side wall of the receiving groove (19). The inner half of the first groove (22) is provided with a vertical positioning block (20). The side of the positioning block (20) is provided with a second groove (41). The second groove (41) extends to the side of the positioning block (20) facing the inner roller (16). The side of the positioning block (20) facing the inner roller (16) is provided with a chamfer (44) corresponding to the second groove (41). The chamfered tooth (39) is located in the second groove (41). The outer end of the chamfered tooth (39) has a transverse gap with the opening of the second groove (41). The end of the second groove (41) away from the inner roller (16) is provided with a slope (42). The pawl (40) is rotatably connected to the stepped wheel (17), and telescopic columns (49) are slidably connected to both sides of the end of the pawl (40). A second spring (50) is connected between the telescopic column (49) and the pawl (40). The positioning block (20) is vertically slidably connected in the first groove (22); the inner roller (16) is connected to a central cylinder (18) sleeved on the outside of the prism shaft (9), and the central cylinder (18) is connected to the positioning block (20) through a connecting rod (21); The positioning block (20) has a threaded strip protrusion (26) on one side, and an internal threaded ring (27) that meshes with the thread of the strip protrusion (26) is rotatably provided inside the outer roller (15). A toothed ring (29) is provided on one side of the internal threaded ring (27), and a gear (30) that meshes with the toothed ring (29) is rotatably installed inside the outer roller (15).

2. The steel bending processing device according to claim 1, characterized in that, The upper part of the prism shaft (9) is provided with a vertical rack (11); the upper side of the outer roller (15) of the roller assembly (10) at the upper part of the prism shaft (9) is connected to a prism cylinder (12) sleeved on the outside of the prism shaft (9), and the inner side of the prism cylinder (12) is horizontally slidably connected to a tooth block (13) that meshes with the rack (11); the prism cylinder (12) is threaded with a bolt (14) that is rotatably connected to the tooth block (13).

3. The steel section bending processing device according to claim 1, characterized in that, The stepped wheel (17) is connected to a guide rod (36) that slides through the inner roller (16) on one side, and a drive ring (38) is connected to the outer end of the guide rod (36).

4. The steel section bending processing device according to claim 1, characterized in that, The pawl (40) is in an inclined state. A hinge seat (45) supporting the pawl (40) is provided on the outside of the stepped wheel (17). A torsion spring (46) is provided between the hinge seat (45) and the pawl (40) to make the end of the pawl (40) flip. A stop bar (47) is provided on the hinge seat (45) to prevent the end of the pawl (40) from flipping. A third groove (48) for accommodating the telescopic column (49) is provided on both sides of the end of the pawl (40).

5. The steel section bending processing device according to claim 1, characterized in that, The first groove (22) has a fourth groove (43) that cooperates with the strip protrusion (26) on its inner side; the outer roller (15) has an annular cavity (28) for the inner threaded ring (27) to rotate, and the annular cavity (28) is connected to the fourth groove (43).

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