An efficient bending device for steel structure production

Abstract

The present invention relates to the technical field of steel structure processing, and specifically to an efficient bending device for steel structure production, comprising a fixed die, a movable die and a positioning assembly, wherein the positioning assembly has two positioning frames, and two positioning wheels distributed in a vertical direction are arranged on opposite sides of the two positioning frames. The positioning frames are also provided with an adjustment assembly, and the adjustment assembly includes two adjustment seats arranged on the positioning frames along the longitudinal direction and capable of adjusting the spacing. Through the positioning assembly, H-shaped steels of different sizes can be effectively clamped and fixed, and the positioning wheels installed on the two positioning frames can adapt to various bending requirements, and the spacing between the two positioning wheels on the same positioning frame can be adjusted by the adjustment assembly, thereby achieving stable clamping of H-shaped steels of different heights. At the same time, the spacing between the two positioning frames can also be adjusted to meet the fixing requirements of H-shaped steels of different widths. This structure solves the problem of unstable clamping of existing bending equipment when processing H-shaped steels of different models.

Description

Technical Field

[0001] The present invention relates to the technical field of steel structure processing, and in particular to a high-efficiency bending device for steel structure production. Background Art

[0002] In the field of steel structure production, H-beams are a common structural component, widely used in projects such as buildings and bridges. H-beams consist of a web and flanges, and their bending process can generally be divided into two methods: web bending and flange bending. Web bending is mainly used to adjust the mechanical properties of the structure, such as enhancing shear resistance or optimizing load distribution. It is relatively easy to process and cost-effective, making it a common practice in engineering. Flange bending, on the other hand, is more commonly used for special design needs, such as arched bridges and streamlined buildings, to meet specific aesthetic or structural performance requirements.

[0003] However, existing H-beam bending processing equipment has obvious functional limitations. The equipment currently available on the market can usually only achieve a single type of bending, that is, it can only bend the web or only bend the flange. This single-function design forces companies to purchase multiple devices when facing diverse processing needs, which not only increases the equipment investment cost, but also brings complexity to production management. In addition, since the flange width of H-beam is usually larger than the web thickness, and the inner and outer sides of the flange are mostly straight-edge structures, if there is a lack of effective support during the bending process, distortion and deformation are very likely to occur, resulting in processing failure. This problem is particularly prominent in the processing of large-size or high-strength H-beams, which not only affects the quality of the finished product, but may also cause material waste and reduced production efficiency.

[0004] Patent document publication number CN114769386B discloses an H-shaped steel bending and forming equipment, including a frame placed above the ground, a first fixed frame and a second fixed frame are fixedly installed in parallel on the upper surface of the frame, and a die is fixedly installed on the outer side of the first fixed frame, and a hydraulic rod is fixedly installed on the back side of the second fixed frame, a top plate is arranged in parallel on the outer side of the second fixed frame, and the top plate is fixedly installed on the rod body end of the hydraulic rod; a hydraulic pump station is fixedly installed on the outer side of the frame; and also includes: a movable frame, movably connected to the lower surface of the upper end of the frame, and a guide column is fixedly installed on the upper surface of the end of the movable frame.

[0005] This H-beam bending equipment primarily uses a support member that extends into the H-beam's groove, and uses clamping blocks that expand relative to the support member to clamp and secure the flange. However, this structure has significant limitations: the equipment is only suitable for bending webs, not flanges. This results in the need to rely on multiple machines to meet different processing requirements, reducing production flexibility.

[0006] Because the clamping block has a fixed stroke, when the flange spacing of the H-beam exceeds the clamping block's maximum adjustment range, the equipment cannot provide effective fixation, affecting processing stability. H-beams of different specifications (such as those with extra-wide flanges or unusual cross-sectional shapes) may not fit into the existing clamping structure, resulting in deviation or deformation during processing, affecting forming accuracy. Summary of the Invention

[0007] In response to the problems existing in the existing technology, an efficient bending device for steel structure production is provided. Through the positioning component, H-shaped steels of different sizes can be effectively clamped and fixed. The positioning wheels installed on the two positioning frames can adapt to various bending requirements, and the spacing between the two positioning wheels on the same positioning frame can be adjusted by the adjustment component, thereby achieving stable clamping of H-shaped steels of different heights. At the same time, the spacing between the two positioning frames can also be adjusted to meet the fixing requirements of H-shaped steels of different widths. This structure solves the problem of unstable clamping of existing bending equipment when processing H-shaped steels of different models.

[0008] In order to solve the problems of the prior art, the present invention provides a high-efficiency bending device for steel structure production, which is used for bending H-shaped steel. It includes a fixed mold and a movable mold. A clamping groove for placing the H-shaped steel is formed between the fixed mold and the movable mold. Positioning components that can move along the mold closing direction are provided on both sides of the clamping groove. The positioning component has two positioning frames that can move toward each other. Two positioning wheels distributed in the vertical direction are provided on opposite sides of the two positioning frames. When the H-shaped steel passes through the two positioning frames, the circumferential surface of the positioning wheel abuts against the edge of the wing plate of the H-shaped steel. The positioning frame is also provided with an adjustment component for adjusting the spacing between the two positioning wheels. The adjustment component includes two adjustment seats that are arranged on the positioning frame along the longitudinal direction and can adjust the spacing. The positioning wheel is rotatably connected to the adjustment seat.

[0009] Preferably, the positioning wheel is elastically connected to the adjustment seat, and the positioning wheel has a cylindrical surface and a conical surface with a diameter larger than the cylindrical surface. When the two adjustment seats move toward each other, the conical surface on the positioning wheel first contacts the wing plate of the H-shaped steel and then the cylindrical surface contacts it to form a clamp.

[0010] Preferably, the positioning wheel has a coaxial axle therewith, the axle passes through the adjustment seat and slides with it, a limiting ring and an elastic buffer element are provided on the axle, the limiting ring is located on the side of the adjustment seat away from the positioning wheel, and the elastic buffer element is located between the adjustment seat and the positioning wheel.

[0011] Preferably, the adjustment assembly also includes a bidirectional screw and two drive seats. The bidirectional screw is arranged on the positioning frame for longitudinal rotation, and the two drive seats are arranged on the positioning frame for longitudinal movement toward each other. The two drive seats are connected to the two adjustment seats, and the two ends of the bidirectional screw pass through the two drive seats respectively and are threadedly connected to them.

[0012] Preferably, the positioning assembly also includes a base, and two positioning frames are arranged on the base for movement toward each other. The base is provided with an adjustment shaft passing through the two positioning frames and an adjustment motor for driving the adjustment shaft to rotate. The bottom end of the bidirectional screw is provided with a driven bevel gear, and the positioning frame is also provided with an active bevel gear connected to the rotation thereof. The active bevel gear is meshed with the driven bevel gear, and the active bevel gear is coaxially splined with the adjustment shaft.

[0013] Preferably, there are at least two groups of positioning wheels distributed vertically on the positioning frame.

[0014] Preferably, the positioning assembly also includes a base that can move along the mold closing direction, a rotating shaft is provided at the center position of the bottom end of the base, the rotating shaft is rotatably provided at the top end of the base, and an elastic torsion assembly connected to the rotating shaft is provided at the top end of the base. When the two ends of the H-shaped steel bend relative to its center position, the base is driven to deflect relative to the base.

[0015] Preferably, the elastic torsion assembly includes a guide rod, a gear ring, a rack and an elastic return element. The guide rod is arranged on the base and is parallel to the tangent of the rotating shaft. Limit seats are provided at both ends of the wire rod. The gear ring is coaxially fixedly arranged on the rotating shaft. The guide rod passes through the rack and slides with it. The elastic return element is sleeved on the guide rod, and the elastic return element is located between the rack and the limit seat.

[0016] Preferably, the positioning assembly also includes a fixing rod arranged at the bottom of the base, the fixing rod extends along the mold closing direction, and fixing seats are provided at both ends of the fixing rod. The base and the fixing rod are slidably matched, and an elastic reset element is provided on the positioning rod, which is located between the base and the fixed seat close to the fixed mold.

[0017] Preferably, the fixing rod is further provided with a fixing ring threadedly connected thereto, and the base is elastically abutted against the fixing ring under the action of the elastic reset element.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] This application achieves flexible adaptation to H-beams of varying heights and widths by providing positioning wheels with adjustable spacing and a movable positioning frame, greatly improving the versatility and processing efficiency of the equipment. The positioning wheels form a flexible fit with the flange edges of the H-beam, avoiding unstable clamping or steel slippage caused by size mismatch, effectively improving stability and forming accuracy during the bending process. In addition, the adjustment component has a simple structure and is easy to adjust, making it suitable for quickly switching between workpieces of different specifications, meeting the production needs of batch processing and multi-specification orders, and reducing the frequency of manual intervention and equipment adjustment time.

[0020] This application also utilizes a positioning wheel with a composite structure of conical and cylindrical surfaces, combined with an elastic connection design, to achieve a gradual transition and flexible buffering during the clamping process. This effectively solves the problems of uneven force, unstable contact of the positioning wheel, and damage to the wing plate during positioning and clamping in the existing technology. The conical surface provides a guiding function during the approach phase, allowing the H-beam to enter the clamping area quickly and smoothly, while the cylindrical surface provides a large area of ​​evenly stressed fitting support during the final clamping phase, ensuring the firmness and safety of the clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional diagram of a high-efficiency bending device for steel structure production according to the present invention.

[0022] Figure 2 It is a top view of a high-efficiency bending device for steel structure production according to the present invention.

[0023] Figure 3 It is a side view of a high-efficiency bending device for steel structure production according to the present invention.

[0024] Figure 4 It is a schematic diagram of a positioning component of an efficient bending device for steel structure production according to the present invention when bending H-shaped steel along the width direction.

[0025] Figure 5 yes Figure 4 A partial enlarged view of point A.

[0026] Figure 6 It is a schematic diagram of a positioning component of an efficient bending device for steel structure production according to the present invention when bending H-shaped steel along the thickness direction.

[0027] Figure 7 It is a stereoscopic diagram of a positioning component in a high-efficiency bending device for steel structure production according to the present invention.

[0028] Figure 8 yes Figure 7 A partial enlarged view of point B.

[0029] Figure 9 It is a schematic diagram of an elastic torsion component in a high-efficiency bending device for steel structure production according to the present invention.

[0030] Figure 10 It is a schematic diagram of a positioning frame and positioning wheels in a high-efficiency bending device for steel structure production according to the present invention.

[0031] The numbers in the figure are: 1. Fixed mold; 2. Moving mold; 31. Positioning frame; 311. Active bevel gear; 32. Positioning wheel; 321. Wheel axle; 322. Limiting ring; 323. Elastic buffer element; 33. Adjusting assembly; 331. Adjusting seat; 332. Bidirectional screw rod; 3321. Driven bevel gear; 333. Driving seat; 35. Base; 351. Adjusting shaft; 352. Adjusting motor; 353. Rotating shaft; 36. Base; 37. Elastic torsion assembly; 371. Guide rod; 3711. Limiting seat; 372. Gear ring; 373. Rack; 374. Elastic return element; 381. Fixed rod; 382. Fixed seat; 383. Elastic reset element; 384. Fixed ring; 4. Hydraulic cylinder. DETAILED DESCRIPTION

[0032] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] like Figure 1 、 Figure 2 and Figure 3 As shown, an efficient bending device for steel structure production is used for bending H-shaped steel, including a fixed mold 1 and a movable mold 2, a clamping groove for placing the H-shaped steel is formed between the fixed mold 1 and the movable mold 2, and positioning components that can move along the mold closing direction are provided on both sides of the clamping groove. The positioning component has two positioning frames 31 that can move toward each other, and two positioning wheels 32 distributed in the vertical direction are provided on opposite sides of the two positioning frames 31. When the H-shaped steel passes through the two positioning frames 31, the circumferential surface of the positioning wheel 32 abuts the edge of the wing plate of the H-shaped steel. The positioning frame 31 is also provided with an adjustment component 33 for adjusting the spacing between the two positioning wheels 32. The adjustment component 33 includes two adjustment seats 331 arranged on the positioning frame 31 along the longitudinal direction and capable of adjusting the spacing, and the positioning wheel 32 is rotatably connected to the adjustment seat 331.

[0034] This bending machine is suitable for precisely bending H-beams. It comprises a fixed die 1 and a movable die 2 driven by a hydraulic cylinder 4. A clamping groove is formed between the two for accommodating the H-beam. Positioning assemblies are located on either side of the clamping groove, movable along the mold closing direction, to clamp and position H-beams of varying sizes.

[0035] Each positioning assembly consists of two positioning frames 31 that can move toward each other. Two vertically arranged positioning wheels 32 are mounted on opposite sides of the two positioning frames 31. As the H-beam passes through the positioning frames 31, the circumferential surfaces of the positioning wheels 32 form a close contact with the edges of the H-beam flanges, effectively positioning and limiting the steel.

[0036] To accommodate H-beams of varying heights, each positioning bracket 31 is equipped with an adjustment assembly 33. This assembly comprises two longitudinally mounted adjustment seats 331 with adjustable spacing. The positioning wheels 32 are rotatably connected to the adjustment seats 331 via a rotating shaft 353, allowing the spacing between the two positioning wheels 32 to be flexibly adjusted based on actual needs. Furthermore, the lateral distance between the two positioning brackets 31 is also adjustable to accommodate H-beams of varying widths, enabling compatible clamping of a wide variety of steel types.

[0037] like Figure 4 、 Figure 5 and Figure 6 As shown, the positioning wheel 32 is elastically connected to the adjustment seat 331. The positioning wheel 32 has a cylindrical surface and a conical surface with a diameter larger than the cylindrical surface. When the two adjustment seats 331 move toward each other, the conical surface on the positioning wheel 32 first contacts the wing plate of the H-shaped steel and then the cylindrical surface contacts it to form a clamp.

[0038] The positioning wheel 32 and the adjustment seat 331 utilize an elastic connection structure to ensure good adaptability and cushioning performance during positioning and clamping. The positioning wheel 32 is connected to the adjustment seat 331 via an elastic member. This elastic member can be a compression spring, rubber pad, or an elastic material component with good deformation and resilience. This member absorbs some of the deformation during clamping, preventing mechanical damage to the H-beam flange surface caused by the excessive rigidity of the positioning wheel 32, thereby improving clamping reliability and flexibility.

[0039] The outer circumference of the positioning wheel 32 features two contact surfaces: a cylindrical surface and a conical surface, with the conical surface having a larger diameter than the cylindrical surface. During the clamping operation, as the two adjustment seats 331 move horizontally toward each other, driving the positioning wheel 32 toward the edge of the H-beam flange, the conical surface on the positioning wheel 32 first contacts the H-beam flange. Because the conical surface provides guidance, it enables a quick and smooth transition to initial positioning, avoiding impact and deflection caused by angular deviation or flange warping during the initial clamping phase.

[0040] As the adjustment seat 331 approaches, the tapered surface gradually guides the H-beam flange into the cylindrical contact area. At this point, the cylindrical surface and the flange edge form a fully fitted contact, achieving a stable and reliable clamping effect. Compared to the tapered surface, the cylindrical surface has a larger contact area, which can effectively disperse the clamping force, reduce local stress concentration, and prevent local plastic deformation or surface indentation of the H-beam flange due to uneven force.

[0041] Through this step-by-step contact method of "conical surface guidance-cylindrical surface clamping", combined with the buffering effect of the elastic connection, the positioning wheel 32 can achieve precise adaptation and stable clamping when clamping H-shaped steels of different thicknesses and surface conditions, significantly improving the adaptability and reliability of the device in actual bending operations.

[0042] like Figure 5 As shown, the positioning wheel 32 has a wheel axle 321 coaxial with the positioning wheel 32. The wheel axle 321 passes through the adjustment seat 331 and slides with it. A limiting ring 322 and an elastic buffer element 323 are provided on the wheel axle 321. The limiting ring 322 is located on the side of the adjustment seat 331 away from the positioning wheel 32. The elastic buffer element 323 is located between the adjustment seat 331 and the positioning wheel 32.

[0043] The positioning wheel 32 is provided with a coaxial axle 321. The axle 321 extends through an adjustment seat 331 mounted on the positioning frame 31 and forms a sliding fit with the adjustment seat 331. This sliding fit not only ensures that the axle 321 can achieve a certain axial displacement during the clamping process, but also provides structural space for the installation of a buffer structure, helping the clamping mechanism achieve dynamic adaptation and deformation absorption.

[0044] A limiting ring 322 and an elastic buffer element 323 are provided on the axle 321. The limiting ring 322 is located on the side of the adjustment seat 331 facing away from the positioning wheel 32, that is, at the free end of the axle 321. It is used to limit the maximum travel of the axle 321 during the sliding process, preventing excessive displacement of the positioning wheel 322 during the clamping or release process, which could cause structural interference or jamming.

[0045] The elastic buffer element 323 is located between the adjustment seat 331 and the positioning wheel 32, and is mounted around the wheel axle 321. It provides elastic support and shock absorption during the clamping process. The elastic buffer element 323 can be compressed to store energy, mitigating the impact load generated by rapid clamping. It also provides a reverse reset force, ensuring that the positioning wheel 32 automatically returns to its original position after clamping, facilitating subsequent workpiece replacement and automated operation.

[0046] like Figure 7 and Figure 8 As shown, the adjustment assembly 33 also includes a bidirectional screw rod 332 and two drive seats 333. The bidirectional screw rod 332 is arranged on the positioning frame 31 for longitudinal rotation, and the two drive seats 333 are arranged on the positioning frame 31 for longitudinal movement toward each other. The two drive seats 333 are connected to the two adjustment seats 331, and the two ends of the bidirectional screw rod 332 respectively pass through the two drive seats 333 and are threadedly connected to them.

[0047] As the bidirectional screw 332 rotates, it drives the two drive seats 333 to move smoothly in longitudinal directions toward or away from each other, enabling precise adjustment of the adjustment seat 331. As the screw rotates, due to its unique thread structure, the interaction between the screw and the drive seats 333 enables the two drive seats 333 to adjust synchronously, thereby driving the adjustment seat 331 to precisely adjust the distance between the positioning wheel 32 and the H-beam, ensuring height and width adaptation during the clamping process.

[0048] The synchronized movement of the two drive seats 333 ensures the clamping device remains balanced during adjustment, avoiding issues such as unstable clamping or misalignment that could occur due to asymmetrical adjustment. This not only ensures even distribution of clamping force, preventing unnecessary damage to the workpiece surface, but also significantly reduces the rate of workpiece scrap caused by improper equipment adjustment.

[0049] like Figure 7 and Figure 8 As shown, the positioning assembly also includes a base 35, and two positioning frames 31 are arranged on the base 35 so as to move toward each other. The base 35 is provided with an adjusting shaft 351 that passes through the two positioning frames 31 and an adjusting motor 352 that drives the adjusting shaft 351 to rotate. The bottom end of the bidirectional screw 332 is provided with a driven bevel gear 3321, and the positioning frame 31 is also provided with a driving bevel gear 311 that is rotatably connected thereto. The driving bevel gear 311 is meshed with the driven bevel gear 3321, and the driving bevel gear 311 is coaxially splined with the adjusting shaft 351.

[0050] The positioning assembly also includes a base 35, on which two positioning frames 31 are mounted for movement toward each other. These frames support the adjustment mechanism and enable symmetrical adjustment of the positioning wheel 32 assembly. An adjustment shaft 351, extending through the two positioning frames 31, is mounted on the base 35 and drives the entire adjustment system. An adjustment motor 352 is connected to one end of the adjustment shaft 351, which provides precise rotational control of the shaft.

[0051] To efficiently transmit the rotational motion of the adjustment shaft 351 to the adjustment mechanism, the adjustment shaft 351 and the driving bevel gear 311 on the positioning frame 31 utilize a coaxial spline connection. This ensures stable transmission and facilitates assembly and disassembly. Each driving bevel gear 311 meshes with its corresponding driven bevel gear 3321, which is located at the bottom end of the bidirectional screw rod 332 and fixedly connected to it. Thus, rotation of the adjustment shaft 351 drives the driving bevel gear 311, which in turn drives the rotation of the driven bevel gear 3321 and the bidirectional screw rod 332.

[0052] The spline connection between the adjusting shaft 351 and the driving gear can ensure that the adjusting shaft 351 can still transmit torque to the bidirectional screw rod 332 when the two positioning frames 31 move.

[0053] The bidirectional screw rod 332 is threadedly connected to the two drive seats 333. When rotating, it can drive the two drive seats 333 to move toward each other in the longitudinal direction, thereby pushing the connected adjustment seats 331 to adjust synchronously, realizing automatic and precise adjustment of the spacing between the positioning wheels 32.

[0054] like Figure 7 and Figure 10 As shown, there are at least two groups of positioning wheels 32 distributed vertically on the positioning frame 31.

[0055] Each positioning frame 31 is vertically equipped with at least two sets of positioning wheels 32, spaced vertically apart to accommodate the contact and positioning requirements at different heights of the workpiece. This multi-point support structure effectively enhances the vertical clamping stability of the workpiece, preventing deviation or shaking caused by single-point force. It is particularly suitable for the precise positioning of workpieces such as H-beams with irregular shapes or high stress.

[0056] like Figure 9 As shown, the positioning assembly also includes a base 36 that can move along the mold closing direction. A rotating shaft 353 is provided at the center position of the bottom end of the base, and the rotating shaft 353 is rotatably provided at the top end of the base 36. An elastic torsion assembly 37 connected to the rotating shaft 353 is provided at the top end of the base 36. When the two ends of the H-shaped steel bend relative to its center position, the base 35 is driven to deflect relative to the base 36.

[0057] The positioning assembly also includes a base 36 that can move in the mold closing direction, supporting the relative movement of the upper structure. A base plate is located above base 36, with a rotating shaft 353 mounted at the center of its bottom end. This shaft 353 is rotatably mounted on the top of base 36, and its rotation is ensured by bearings or guide structures to ensure flexible and stable rotation.

[0058] At the top of base 36, shaft 353 is connected to a set of elastic torsion components 37. These components provide a certain elastic restoring force when shaft 353 deflects, absorbing or buffering external force disturbances. The design of elastic torsion components 37 not only ensures the positioning system's dynamic responsiveness under changing forces, but also automatically resets when the external force is removed, improving system stability and reliability.

[0059] When the ends of the H-beam bend relative to its center, a torque is generated through their contact with the positioning wheels 32, causing the base plate to deflect accordingly about the rotation axis 353. At this point, driven by the rotation axis 353, the base 35 changes angle relative to the base 36, thus adaptively responding to the H-beam's posture changes and effectively avoiding deformation and stress concentration caused by rigid clamping. The positioning wheels 32 can also roll relative to the H-beam, ensuring that both ends of the H-beam are always supported.

[0060] like Figure 9As shown, the elastic torsion assembly 37 includes a guide rod 371, a gear ring 372, a rack 373 and an elastic return element 374. The guide rod 371 is arranged on the base 36 and is parallel to the tangent of the rotating shaft 353. Limit seats 3711 are set at both ends of the wire rod. The gear ring 372 is coaxially fixedly arranged on the rotating shaft 353. The guide rod 371 passes through the rack 373 and slides with it. The elastic return element 374 is sleeved on the guide rod 371 and is located between the rack 373 and the limit seat 3711.

[0061] The guide rod 371 is fixed to the base 36, with its axial direction parallel to the tangent direction of the rotating shaft 353, and is used to guide the linear movement of the rack 373. A limit seat 3711 is provided at each end of the guide rod 371 to limit the movement range of the rack 373 and provide support for the elastic return element 374.

[0062] A gear ring 372 is coaxially fixed to the rotating shaft 353. The outer circumference of the gear ring 372 is provided with a toothed surface structure that meshes with the rack 373. The rack 373 is arranged to slide along the guide rod 371 and is capable of generating corresponding linear displacement when the gear ring 372 rotates. The sliding fit between the rack 373 and the guide rod 371 ensures flexible movement driven by the gear ring 372.

[0063] The elastic return element 374 is mounted on the guide rod 371, between the rack 373 and the stop seat 3711, and is compressed during the movement of the rack 373. When the gear ring 372 rotates with the shaft 353 and drives the rack 373 to move, the elastic return element 374 provides a reaction force. When the external load is removed, the elastic return element 374 releases its stored elastic energy, pushing the rack 373 back to its initial position, thus achieving the system's automatic reset function.

[0064] The elastic torsion assembly 37 utilizes the meshing transmission and elastic return structure between the gear ring 372 and the rack 373 to effectively convert the rotational displacement of the rotating shaft 353 into linear elastic deformation, so that when the H-shaped steel is bent, its two ends are still supported by the positioning assembly and have a certain buffer adjustment capability and adaptive reset function.

[0065] like Figure 9 As shown, the positioning assembly also includes a fixed rod 381 arranged at the bottom of the base 36, the fixed rod 381 extends along the mold closing direction, and fixed seats 382 are provided at both ends of the fixed rod 381. The base 36 and the fixed rod 381 are slidably matched, and an elastic reset element 383 is provided on the positioning rod, and the elastic reset element 383 is located between the base 36 and the fixed seat 382 close to the fixed mold 1.

[0066] The positioning assembly also includes a fixed rod 381 at the bottom of the base 36. This rod 381 extends along the mold closing direction and provides both fixation and support. Fixed seats 382 are located at each end of the rod 381. These seats 382 securely connect to the base 36 or other structures to ensure the stability of the rod 381 throughout operation. The positioning rod extends through the base 36 and slidably engages with it, allowing it to move freely along the mold closing direction.

[0067] The positioning rod is equipped with an elastic return element 383, located between the rod and a fixed seat 382 near the fixed mold 1. When the base 36 is displaced, the elastic return element 383 is compressed or stretched, providing a restoring force that ensures the base 36 automatically returns to its original position when the external load disappears or changes. This effectively absorbs impact forces during positioning, improving positioning accuracy and stability.

[0068] like Figure 9 As shown, the fixing rod 381 is further provided with a fixing ring 384 threadedly connected thereto, and the base 36 elastically abuts against the fixing ring 384 under the action of the elastic reset element 383 .

[0069] To adjust the initial position of base 36 on fixed rod 381, a fixing ring 384 is threadedly connected to the fixing rod 381. This fixing ring 384 can be screwed along the axial direction of the fixing rod 381, and a threaded pair ensures reliable positioning. This allows for both adjustment and positional stability. By adjusting the initial position of base 36, H-beams of different sizes can be positioned between the fixed mold 1 and the movable mold 2.

[0070] The above embodiments merely represent one or more embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present invention, and such modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the appended claims.

Claims

1. An efficient bending device for steel structure production, used for bending H-shaped steel, including a fixed die and a movable die, characterized in that: A clamping groove for placing the H-shaped steel is formed between the fixed mold and the movable mold. A positioning assembly that can move along the mold closing direction is provided on both sides of the clamping groove. The positioning assembly has two positioning frames that can move toward each other. Two positioning wheels distributed in the vertical direction are provided on opposite sides of the two positioning frames. When the H-shaped steel passes through the two positioning frames, the circumferential surface of the positioning wheel abuts against the edge of the wing plate of the H-shaped steel. The positioning frame is also provided with an adjustment assembly for adjusting the spacing between the two positioning wheels. The adjustment assembly includes two adjustment seats that are longitudinally arranged on the positioning frame and can adjust the spacing. The positioning wheels are rotatably connected to the adjustment seats. The positioning wheel is elastically connected to the adjustment seat. The positioning wheel has a cylindrical surface and a conical surface with a diameter larger than the cylindrical surface. When the two adjustment seats move toward each other, the conical surface on the positioning wheel first contacts the wing plate of the H-shaped steel and then the cylindrical surface contacts it to form a clamping force. The positioning assembly also includes a base that can move along the mold closing direction, a base plate is arranged above the base, a rotating shaft is arranged at the center of the bottom end of the base plate, and the rotating shaft is rotatably arranged at the top end of the base, and an elastic torsion assembly connected to the rotating shaft is arranged at the top end of the base. When the two ends of the H-shaped steel are bent relative to the center position, the base is driven to deflect relative to the base; The elastic torsion assembly includes a guide rod, a gear ring, a rack and an elastic return element. The guide rod is arranged on the base and is parallel to the tangent of the rotating shaft. Limit seats are provided at both ends of the guide rod. The gear ring is coaxially fixedly arranged on the rotating shaft. The guide rod passes through the rack and slides with it. The elastic return element is sleeved on the guide rod and is located between the rack and the limit seat.

2. The high-efficiency bending device for steel structure production according to claim 1, characterized in that: The positioning wheel has a coaxial axle, which passes through the adjustment seat and slides with it. A limit ring and an elastic buffer element are provided on the axle. The limit ring is located on the side of the adjustment seat away from the positioning wheel, and the elastic buffer element is located between the adjustment seat and the positioning wheel.

3. An efficient bending device for steel structure production according to any one of claims 1-2, characterized in that: The adjustment assembly also includes a bidirectional screw and two drive seats. The bidirectional screw is arranged on the positioning frame for longitudinal rotation. The two drive seats are arranged on the positioning frame for longitudinal movement toward each other. The two drive seats are connected to the two adjustment seats. The two ends of the bidirectional screw pass through the two drive seats respectively and are threadedly connected to them.

4. The high-efficiency bending device for steel structure production according to claim 3, characterized in that: The positioning assembly also includes a base, and two positioning frames are arranged on the base for movement toward each other. The base is provided with an adjustment shaft passing through the two positioning frames and an adjustment motor for driving the adjustment shaft to rotate. The bottom end of the bidirectional screw is provided with a driven bevel gear, and the positioning frame is also provided with an active bevel gear connected to the rotation thereof. The active bevel gear is meshed with the driven bevel gear, and the active bevel gear is coaxially splined with the adjustment shaft.

5. The high-efficiency bending device for steel structure production according to any one of claims 1-2, characterized in that: There are at least two groups of positioning wheels vertically distributed on the positioning frame.

6. The high-efficiency bending device for steel structure production according to claim 1, characterized in that: The positioning assembly also includes a fixed rod arranged at the bottom of the base, which extends along the mold closing direction. Fixed seats are provided at both ends of the fixed rod. The base and the fixed rod are slidably matched. An elastic reset element is provided on the positioning rod, and the elastic reset element is located between the base and the fixed seat close to the fixed mold.

7. The high-efficiency bending device for steel structure production according to claim 6, characterized in that: The fixing rod is also provided with a fixing ring which is threadedly connected thereto, and the base is elastically abutted against the fixing ring under the action of the elastic reset element.

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