A roll bending die for a lightweight steel arch member

Abstract

A kind of light weight steel arch member's roll bending die, it includes, roll wheel and bending wheel;Wherein, roll wheel is formed by a pair of male wheel, female wheel, male wheel, female wheel keep relative position fixed;Male wheel, female wheel form the cavity and the section shape of profiled steel consistent, male wheel, female wheel always with profiled steel keep opposite contact, i.e. the upper and lower surfaces of profiled steel are supported by male and female wheel pressure simultaneously;Bending wheel, set in the import side of male wheel, female wheel, export side, and can move up and down along the height direction;Bending wheel section shape and the section shape of profiled steel consistent.The utility model solves the problem of thin-walled profiled steel bending instability, and thin-walled profiled steel bending size high precision, adapt to the lightweight steel arch processing and manufacturing of multiple curvature radius.

Description

Technical Field

[0001] This utility model relates to the field of roll bending equipment, and in particular to a roll bending mold for lightweight steel arch structural components. Background Technology

[0002] In numerous industries such as construction, machinery manufacturing, and automobiles, structural steel is increasingly widely used as an important structural material. To meet the design requirements of various complex shapes, the roll forming process of structural steel is becoming increasingly critical.

[0003] Steel section bending is a common process for bending steel sections. Specifically, bending machines are categorized into manual bending machines, hydraulic bending machines, and CNC bending machines. Manual bending machines are further divided into mechanical manual bending machines and electric manual bending machines. Hydraulic bending machines can be classified by synchronization method into torsion shaft synchronization, mechanical-hydraulic synchronization, and electro-hydraulic synchronization; and by motion method into upward-moving and downward-moving types. This is disclosed in Chinese patents CN115709243 A and CN115709243 A.

[0004] Multiple rolling rollers are arranged in a specific order and spacing to roll the steel profile sequentially. Each rolling roller undertakes a portion of the bending deformation, and by gradually increasing the bending angle, the steel profile ultimately achieves the desired bending shape. This multi-roller synergy makes the bending process more uniform and stable, reducing local stress concentration and uneven deformation.

[0005] However, existing steel roll forming dies generally have some defects:

[0006] 1) Roll forming requires the design and manufacture of specialized rolling dies for steel profiles of different types, specifications, and bending radii. When processing a wide variety of steel profiles, a large number of dies are required, increasing production costs and the difficulty of die management.

[0007] 2) It is difficult to accurately control the bending radius and angle of the steel profile, resulting in low product precision and failure to meet the production requirements of high-precision structural components.

[0008] 3) During the rolling bending process, the friction between the rolling roller and the steel surface is large. If the rolling process parameters are not appropriate or the surface quality of the rolling roller is poor, scratches, indentations and other defects are easily generated on the steel surface, affecting the surface quality and appearance of the steel.

[0009] 4) In general three-roll or four-roll bending processes, similar to molding, the lower surface of the steel section is in a state of suspension on one side, and thin-walled bending still carries the risk of instability. The steel section is prone to instability and wrinkling, which seriously affects product quality, reduces production efficiency, and increases production costs. Summary of the Invention

[0010] The purpose of this invention is to design a rolling bend mold for lightweight steel arch frame components, which solves the problem of bending instability of thin-walled steel. Moreover, the bending dimensions of thin-walled steel are highly accurate, and it is suitable for the processing and manufacturing of lightweight steel arch frames with multiple curvature radii.

[0011] To achieve the above objectives, the technical solution of this utility model is as follows:

[0012] A roll bending die for a lightweight steel arch structural member includes a roll forming wheel and a bending wheel; wherein,

[0013] The rolling roller consists of a male and a female roller, which are kept in a fixed relative position. The cavity formed by the male and female rollers is consistent with the cross-sectional shape of the steel profile. The male and female rollers are always in direct contact with the steel profile, meaning that the upper and lower surfaces of the steel profile are simultaneously supported by the pressure of the male and female rollers.

[0014] The bending wheel is located on the inlet and outlet sides of the male and female wheels and can move up and down along the height direction; the cross-sectional shape of the bending wheel is consistent with the cross-sectional shape of the steel section.

[0015] Preferably, the gap between the male wheel, the female wheel and the steel section is controlled between 1.1 and 1.3 times the thickness of the steel section.

[0016] Preferably, a guide constraint block is provided between the outlet of the male wheel and the female wheel and the inlet of the curved wheel. The guide constraint block is in the shape of an inverted U, and its inner edges match the two sides of the steel profile.

[0017] Preferably, the end of the male wheel that contacts the steel section is provided with a groove whose cross-sectional shape matches the steel section. The lower part of the inner wall of the groove near the outer side wall is a straight plane, and the upper part is an inclined plane, forming a trumpet shape; and the two surfaces of the lower and upper parts are connected by a rounded transition.

[0018] Preferably, the end of the bending wheel that contacts the steel section has a groove with a cross-sectional shape matching the steel section. The lower part of the inner wall of the groove near the outer side wall is a straight plane, and the upper part is an inclined plane, forming a trumpet shape. Furthermore, the two surfaces of the lower and upper parts are connected by an arc transition.

[0019] Preferably, the bending wheel is provided with a lifting mechanism that causes the bending wheel to move up and down, and / or a moving mechanism that causes the bending wheel to move back and forth along the direction of movement of the steel profile.

[0020] Preferably, the lifting mechanism is a hydraulic cylinder or an electric cylinder, and / or the moving mechanism is a hydraulic cylinder or an electric cylinder.

[0021] Preferably, the male wheel and / or female wheel are respectively provided with lifting and adjusting mechanisms.

[0022] Preferably, the lifting and adjusting mechanism includes a threaded adjusting rod disposed on the mold frame on which the male or female wheel is mounted, and one end of the adjusting rod is connected to the axle seat of the male or female wheel.

[0023] Preferably, the lifting and adjusting mechanism includes a hydraulic cylinder or electric cylinder mounted on a mold frame for mounting the male or female wheel, with its output end connected to the shaft seat of the male or female wheel.

[0024] The rolling bending die of this utility model includes rolling rollers (male and female rollers) and bending rollers; the male and female rollers maintain a fixed relative position. Unlike the three-roller or four-roller rolling bending generally used in the prior art, the male and female rollers in this utility model maintain pressure contact with the steel throughout the entire process. The bending radius of the steel is controlled by the stroke of the bending roller, which helps the steel to obtain the target bending arc.

[0025] Guide constraint blocks are set on both sides of the male and female wheels to constrain the width of the rolled edge when the steel is bent and deformed, thus maintaining a better dimensional cross-section.

[0026] In addition to the size constraints of the male and female wheels, the upper slope of the groove sidewall of the bending wheel makes the groove port form a flared shape; and the upper and lower parts are connected by a rounded transition, which ensures that the steel can smoothly enter the groove of the bending wheel when it is bent.

[0027] Compared with the prior art, the advantages of this utility model are:

[0028] To address the issues of wrinkling, instability, and end opening that are prone to occur in thin-walled steel sections, the design of roller set molds has effectively controlled these problems.

[0029] 1) The male and female rollers of the rolling rollers are arranged opposite each other and contact the same point of the steel section at the same time, which plays a supporting role and ensures that the steel section is in a non-suspended and unstable state when plastic deformation occurs.

[0030] 2) The roller section is set with a small gap, and a constraint structure is designed on the outside to ensure that the thin-walled steel is constrained during the bending process and maintains the relative stability of the cross-sectional dimensions.

[0031] 3) The groove of the bending roller is set according to the outline of the steel section, and a constraint structure is added on the outside to constrain the opening of the front end of the steel section so that it can smoothly enter the roller.

[0032] 4) Add a guide constraint block to the gap between the rolling roller and the bending roller. This part is tangent to the bending roller in terms of stroke. When the steel section is bent to the end and exits the bending roller, it smoothly enters the roller under the constraint of the guide block, avoiding excessively long suspended free section from curling. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0034] Figure 2 This is a front view of Embodiment 1 of the present invention;

[0035] Figure 3 This is a schematic diagram of the structure of the rolling roller and the steel profile in an embodiment of this utility model;

[0036] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0037] Figure 5 for Figure 2 AA section view;

[0038] Figure 6 for Figure 5 Enlarged schematic diagram of part B;

[0039] Figure 7 This is a perspective view of the steel profile described in this utility model;

[0040] Figure 8 This is a front view of the steel profile described in this utility model. Detailed Implementation

[0041] See Figures 1 to 8 The lightweight steel arch structure component roll bending die of this utility model includes a rolling roller 1 and a bending roller 2; wherein,

[0042] The rolling roller 1 consists of a male roller 11 and a female roller 12, with the male roller 11 and female roller 12 maintaining a fixed relative position. The cavity formed by the male roller 11 and female roller 12 is consistent with the cross-sectional shape of the steel profile 100. The male roller 11 and female roller 12 always maintain direct contact with the steel profile 100, meaning that the upper and lower surfaces of the steel profile 100 are simultaneously supported by the pressure of the male and female rollers.

[0043] The bending wheel 2 is located on the inlet and outlet sides of the male wheel 11 and the female wheel 12, and can move up and down along the height direction; the cross-sectional shape of the bending wheel 2 is consistent with the cross-sectional shape of the steel section 100.

[0044] Preferably, the gap between the male wheel, the female wheel and the steel section is controlled between 1.1 and 1.3 times the thickness of the steel section.

[0045] Preferably, a guide constraint block 3 is provided between the outlet of the male wheel 11 and the female wheel 12 and the inlet of the bending wheel 2. The guide constraint block 3 is inverted U-shaped, and its inner edge matches the two sides of the steel profile 100. The groove sidewall of the bending wheel 2 is provided with a straight section constraint and an arc transition is added to ensure that the steel profile can smoothly enter the groove of the bending wheel when bending.

[0046] Preferably, the end of the male wheel 11 that contacts the steel section 100 is provided with a groove 111 whose cross-sectional shape matches that of the steel section 100. The lower part of the inner wall of the groove 111 near the outer side wall is a straight plane 112, and the upper part is an inclined plane 113, forming a trumpet shape; and the two surfaces of the lower and upper parts are connected by an arc transition.

[0047] Preferably, the end of the bending wheel that contacts the steel section has a groove with a cross-sectional shape matching the steel section. The lower part of the inner wall of the groove near the outer side wall is a straight plane, and the upper part is an inclined plane, forming a trumpet shape. Furthermore, the two surfaces of the lower and upper parts are connected by an arc transition.

[0048] Preferably, the bending wheel is provided with a lifting mechanism that causes the bending wheel to move up and down, and / or a moving mechanism that causes the bending wheel to move back and forth along the direction of movement of the steel profile.

[0049] Preferably, the lifting mechanism is a hydraulic cylinder or an electric cylinder.

[0050] Preferably, the moving mechanism is a hydraulic cylinder or an electric cylinder.

[0051] Preferably, the male wheel and / or female wheel are respectively provided with lifting and adjusting mechanisms.

[0052] Preferably, the lifting and adjusting mechanism includes a threaded adjusting rod disposed on the mold frame on which the male or female wheel is mounted, and one end of the adjusting rod is connected to the axle seat of the male or female wheel.

[0053] Preferably, the lifting and adjusting mechanism includes a hydraulic cylinder or electric cylinder mounted on the mold frame on which the male or female wheel is mounted, and its output end is connected to the shaft seat of the male or female wheel.

Claims

1. A roll bending die for a lightweight steel arch structural component, characterized in that, Includes rolling rollers and bending rollers; among which, The rolling roller consists of a male and a female roller, which are kept in a fixed relative position. The cavity formed by the male and female rollers is consistent with the cross-sectional shape of the steel profile. The male and female rollers are always in direct contact with the steel profile, meaning that the upper and lower surfaces of the steel profile are simultaneously supported by the pressure of the male and female rollers. The bending wheel is located on the inlet and outlet sides of the male and female wheels and can move up and down along the height direction; the cross-sectional shape of the bending wheel is consistent with the cross-sectional shape of the steel section.

2. The roll bending die for the lightweight steel arch structure component as described in claim 1, characterized in that, The gap between the male and female wheels and the structural steel is controlled between 1.1 and 1.3 times the thickness of the structural steel.

3. The roll bending die for the lightweight steel arch structure component as described in claim 1, characterized in that, A guide constraint block is provided between the outlet of the male and female wheels and the inlet of the curved wheel. The guide constraint block is in the shape of an inverted U, and its inner edges match the two sides of the steel profile.

4. The roll bending die for the lightweight steel arch structure component as described in claim 1, characterized in that, The end of the male wheel that contacts the steel section is provided with a groove whose cross-sectional shape matches the steel section. The lower part of the inner wall of the groove near the outer side wall is a straight plane, and the upper part is a slope, forming a trumpet shape. Furthermore, the two surfaces of the lower and upper parts are connected by a rounded transition.

5. The roll bending die for the lightweight steel arch structure component as described in claim 1, characterized in that, The end of the bending wheel that contacts the steel section is provided with a groove whose cross-sectional shape matches the steel section. The lower part of the inner wall of the groove near the outer side wall is a straight plane, and the upper part is a slope, forming a trumpet shape. Furthermore, the two surfaces of the lower and upper parts are connected by a circular arc transition.

6. The roll bending die for the lightweight steel arch structure component as described in claim 1 or 5, characterized in that, The bending wheel is provided with a lifting mechanism that causes the bending wheel to move up and down, and / or a moving mechanism that causes the bending wheel to move back and forth along the direction of the steel profile.

7. The roll bending die for the lightweight steel arch structure component as described in claim 6, characterized in that, The lifting mechanism is a hydraulic cylinder or an electric cylinder, and / or the moving mechanism is a hydraulic cylinder or an electric cylinder.

8. The roll bending die for lightweight steel arch structural members as described in claim 1, 2, 3, or 4, characterized in that, The male and / or female wheels are respectively equipped with lifting and adjusting mechanisms.

9. The roll bending die for the lightweight steel arch structure component as described in claim 8, characterized in that, The lifting and adjusting mechanism includes a threaded adjusting rod mounted on the mold frame on which the male or female wheel is installed, with one end of the adjusting rod connected to the axle seat of the male or female wheel.

10. The roll bending die for the lightweight steel arch structure component as described in claim 8, characterized in that, The lifting and adjusting mechanism includes a hydraulic cylinder or electric cylinder mounted on a mold frame for mounting the male or female wheel, with its output end connected to the shaft seat of the male or female wheel.

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