Bending forming device for thin-wall supporting component

Abstract

A bending forming device for a thin-wall supporting component comprises an upper die base and a lower die base. The lower die is mounted on the lower die holder and consists of a fixed die core and a movable die core; the fixed die core comprises a first bending die core and a second bending die core which are spaced left and right, are convex dies of which the upper parts are matched with the section shape of the thin-wall support, and are fixedly connected with the lower die holder respectively; the movable mold core is arranged between the first bending mold core and the second bending mold core and comprises a movable bending mold core and an adjusting mechanism; the movable bending mold core is a concave mold matched with the section shape of the thin-wall support; the movable bending die core is arranged on the adjusting mechanism, and the adjusting mechanism is installed on the lower die base. And the upper die is a concave die matched with the section shape of the thin-wall support.

Description

Technical Field

[0001] This utility model relates to the field of molding technology, specifically to a bending and forming device for thin-walled support components. Background Technology

[0002] Thin-walled steel sections are widely used in many fields such as construction, machinery manufacturing, and the automotive industry due to their advantages such as light weight and high strength. In actual production processes, thin-walled steel sections often need to be bent to meet the requirements of different shapes and structures.

[0003] Existing bending machines are mainly based on three-roll bending, four-roll bending and other processes. Their advantages are that the bending radius is continuous and the dimensions of the steel section are stable after processing. However, the disadvantage is that the bending radius is fixed. When it is necessary to produce thin-walled steel products with different bending radii, it is often necessary to change the entire set of molds. This not only consumes a lot of time and labor costs, but also the frequent replacement of molds can easily cause the equipment precision to decrease and affect the product quality.

[0004] Furthermore, traditional processes for bending thin-walled steel sections are prone to defects such as cross-sectional deformation and wrinkling, reducing the product yield. Therefore, there is an urgent need for a process and mold that can flexibly adjust the bending radius and effectively ensure the bending quality of thin-walled steel sections.

[0005] Compression molding is also a process for bending steel profiles. Taking U-shaped steel as an example, there are existing processes for bending steel profiles using stamping equipment and molds. However, due to the instability of thin-walled steel profiles, it is difficult to obtain products with high bending quality under traditional compression molding methods. For example, Chinese patent CN222036569U discloses a cold-bending steel profile stamping machine with a limit alignment function. This stamping machine includes a stamping machine base, a main support, a hydraulic cylinder support, an upper mold, and a lower mold. A pre-pressing block is slidably nested in the upper mold, and a pressure head extends downward from the top of the pre-pressing block. The hydraulically lifted pre-pressing block lowers before the upper mold stamps, pressing the workpiece onto the lower mold, thus providing multiple fixations for the workpiece and improving processing accuracy.

[0006] Chinese patent CN221773202U discloses a steel structure stamping and bending device, including a frame and a stamping frame correspondingly located above the frame. A loading frame for loading a die is located at the center of the bottom of the stamping frame, and a carrier plate, coinciding with the center of the loading frame, is located inside the frame at its center. The carrier plate includes a bending seat one and a bending seat two. A groove is formed along the length of bending seat one, recessed into its interior. A sliding plate, adapted to slide within the groove, is located at the bottom of bending seat two. A push rod is connected to the bottom of bending seat one. The relative distance between bending seat one and bending seat two is adjusted by extending and retracting the push rod, thereby adjusting the bending angle. The device has a simple structure, convenient bending angle adjustment, and eliminates the need to change dies during production, saving time and labor and improving work efficiency. However, the above-mentioned cold stamping bending equipment and solutions cannot solve the problems of thin-walled steel instability and wrinkling, and end opening during bending. Summary of the Invention

[0007] The purpose of this invention is to provide a bending and forming device for thin-walled support components, which can effectively avoid defects such as local instability and wrinkling of thin-walled steel that may be caused by a large deformation in one operation. It is particularly suitable for bending processing of open thin-walled steel parts.

[0008] To achieve the above objectives, the technical solution of this utility model is as follows:

[0009] A bending forming device for thin-walled support, comprising:

[0010] Upper mold base, lower mold base;

[0011] The lower mold, mounted on the lower mold base, consists of a fixed mold core and a movable mold core. The fixed mold core includes a first bending mold core and a second bending mold core spaced apart on the left and right. The fixed mold core is a punch with an upper section that matches the cross-sectional shape of the thin-walled support and is fixedly connected to the lower mold base. The movable mold core is located between the first bending mold core and the second bending mold core and includes a movable bending mold core and an adjustment mechanism. The movable bending mold core is a die that matches the cross-sectional shape of the thin-walled support. The movable bending mold core is mounted on the adjustment mechanism, which is installed on the lower mold base.

[0012] The upper mold is a concave mold that matches the cross-sectional shape of the thin-walled support.

[0013] Preferably, the adjusting mechanism adopts a screw and nut structure, a hydraulic device, or a pneumatic device.

[0014] Furthermore, several clamping blocks are provided, symmetrically arranged on the upper end face of the lower mold base on both sides of the lower mold.

[0015] Furthermore, a clamping device is provided, including several clamping blocks and their corresponding driving mechanisms. The clamping blocks are arranged symmetrically on both sides of the lower mold.

[0016] Preferably, the driving mechanism is a pneumatic cylinder or a hydraulic cylinder.

[0017] In the design of the bending forming device described in this utility model:

[0018] This invention features a movable mold core in the lower mold, connected by an adjustment mechanism. During the pressing process of the upper mold, the movable mold core forms a clamping motion with the upper mold. During the molding process, the movable mold core always adheres to the lower surface of the thin-walled steel and supports the upper mold to follow the movement. Under the action of the supporting force, combined with multiple bending processes, the problem of instability of the lower surface of the thin-walled steel can be effectively overcome.

[0019] In addition, this utility model provides a clamping block or clamping block device at the end of the lower mold, which can shape the outer side of the steel section during the bending deformation of the thin-walled steel section.

[0020] Compared with the prior art, the advantages of this utility model are:

[0021] During normal pressure bending, the upper surface of the thin-walled steel section is bent and deformed by the action of the upper die, while the lower surface is far from the lower die and is suspended in the air. Therefore, it is prone to instability and wrinkling.

[0022] This invention features a movable mold core in the lower mold. During the molding process, the movable mold core remains in contact with the lower surface of the steel section, supporting the upper mold and allowing it to move accordingly. Under the support force, combined with multiple bending processes, the problem of instability of the lower surface of thin-walled steel sections can be effectively overcome.

[0023] This invention features a local clamping device at the end of the lower die, which ensures that the end of the thin-walled steel is always constrained during the molding and bending process. The application of a forming force further guarantees the end dimensions of the steel, while the local clamping part reduces the demolding difficulty during the multi-pass molding process. Attached Figure Description

[0024] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0025] Figure 2 This is an exploded perspective view of an embodiment of the present utility model;

[0026] Figure 3 This is a front view of an embodiment of the present utility model;

[0027] Figure 4 This is a side view of an embodiment of the present utility model;

[0028] Figure 5 A three-dimensional view of a thin-walled support component;

[0029] Figure 6 This is a cross-sectional view of a thin-walled support component. Detailed Implementation

[0030] See Figures 1-6The thin-walled support member bending and forming device of this utility model includes:

[0031] Upper mold base 1, lower mold base 2;

[0032] The lower mold 3, mounted on the lower mold base, consists of a fixed mold core 31 and a movable mold core 32. The fixed mold core 31 includes a first bending mold core 311 and a second bending mold core 312 spaced apart on the left and right. The second bending mold core 311 is a punch with an upper cross-sectional shape that matches the thin-walled support and is fixedly connected to the lower mold base. The movable mold core 32 is disposed between the first bending mold core 311 and the second bending mold core 312. It includes a movable bending mold core 321 and an adjustment mechanism 322. The movable bending mold core 321 is a punch with a cross-sectional shape that matches the thin-walled support. The movable bending mold core 321 is disposed on the adjustment mechanism 322, which is mounted on the lower mold base.

[0033] Upper mold 4 is a concave mold that matches the cross-sectional shape of the thin-walled support.

[0034] Preferably, the adjusting mechanism 322 adopts a screw and nut structure, a hydraulic device, or a pneumatic device.

[0035] Furthermore, several clamping blocks 5 are provided, symmetrically arranged on the upper end face of the lower mold base on both sides of the lower mold 3.

[0036] Furthermore, a clamping device is provided, including several clamping blocks and their corresponding driving mechanisms. The clamping blocks are arranged symmetrically on both sides of the lower mold.

[0037] Preferably, the driving mechanism is a pneumatic cylinder or a hydraulic cylinder.

[0038] By using clamping blocks or clamping devices to clamp the ends of thin-walled steel sections during the bending process, the clamping force can be applied evenly to the steel section, ensuring that the ends of the steel section do not open up during the bending process.

[0039] Example 1

[0040] To prepare a 2.5-meter-long thin-walled steel component, the mold length was selected as 1000mm, and the thin-walled steel was divided into 3 bending forming areas according to a single bending length of 850mm.

[0041] First, place one end of the thin-walled steel section on the lower mold and perform bending in the first bending forming area. The bending is divided into three steps, with the upper mold's downward stroke set at 20%, 40%, and 40% of the total stroke for each step. After each bending step, open the upper mold, and the thin-walled steel section shifts 50mm to the other side. Then, perform the next bending step according to the set upper mold downward stroke. When the upper mold is fully depressed and closed in the third step, the thin-walled steel section shifts 700mm to the other side. Continue bending in the second bending forming area, with the upper mold's downward stroke also set at 20%, 40%, and 40% of the total stroke for each step. After completing the second bending forming area, perform the third bending forming area using the same method, finally completing the entire 2.5-meter-long thin-walled support component 100 (e.g., Figure 5 , Figure 6 The bending process shown in the figure.

[0042] Example 2

[0043] To prepare a 3.5-meter-long thin-walled steel component, the mold length was selected as 1100mm, and the thin-walled steel with a single bending length of 950mm was divided into 4 bending forming areas.

[0044] First, the thin-walled steel section is placed on the lower mold at one end for bending in the first bending forming area. The bending is divided into four steps, with the upper mold's downward stroke set at 15%, 25%, 30%, and 30% of the total stroke for each step. After each bending step, the thin-walled steel section is shifted 50mm to the other side. Then, the next bending step is performed according to the set upper mold downward stroke. When the upper mold reaches its lowest point in the fourth step and closes with the lower mold, the thin-walled steel section shifts 800mm to the other side. The bending of the second bending forming area continues, with the upper mold's downward stroke also set at 15%, 25%, 30%, and 30% of the total stroke for each step. After completing the second bending forming area, the third and fourth bending forming areas are performed using the same method, ultimately completing the entire 3.5-meter-long thin-walled support component 100 (e.g., Figure 5 , Figure 6 The bending process shown in the figure.

Claims

1. A bending and forming device for thin-walled support components, characterized in that, include: Upper mold base, lower mold base; The lower mold, mounted on the lower mold base, consists of a fixed mold core and a movable mold core. The fixed mold core includes a first bending mold core and a second bending mold core spaced apart on the left and right. The fixed mold core is a punch whose upper part matches the cross-sectional shape of the thin-walled support and is fixedly connected to the lower mold base. The movable mold core is located between the first bending mold core and the second bending mold core and includes a movable bending mold core and an adjustment mechanism. The movable bending mold core is a die whose cross-sectional shape matches the thin-walled support. The movable bending die core is set on the adjustment mechanism, and the adjustment mechanism is installed on the lower die base; The upper mold is a concave mold that matches the cross-sectional shape of the thin-walled support.

2. The thin-wall support member bending forming apparatus according to claim 1, wherein The adjustment mechanism adopts a screw and nut structure, a hydraulic device, or a pneumatic device.

3. The thin walled support member bend forming apparatus of claim 1 wherein, It is also equipped with several clamping blocks, which are symmetrically arranged on the upper end face of the lower mold base on both sides of the lower mold.

4. The thin walled support member bend forming apparatus of claim 1 wherein, It is also equipped with a clamping device, including several clamping blocks and their corresponding driving mechanisms. The clamping blocks are located on the lower sides of the lower mold and are arranged symmetrically.

5. The thin walled support member bend forming apparatus of claim 4 wherein, The driving mechanism is a pneumatic cylinder or a hydraulic cylinder.

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