Aluminum sheet metal bending test fixture

Abstract

The invention discloses an aluminum plate sheet metal bending test fixture, comprising a base; a bending core, comprising a forming head, wherein the bending compression surface of the aluminum plate contacts with the outer contour of the forming head during the aluminum plate sheet metal forming process, and the bending core is detachably fixedly connected to the base; a bending mechanism, comprising a bending roller and a bending roller driving mechanism, wherein the bending roller is movably connected to the output end of the bending driving mechanism, and the axis of the bending roller is parallel to the extension direction of the forming head, and the output end of the bending driving mechanism drives the bending roller to rotate relative to the bending core according to a set circle center, wherein the bending tensile surface of the aluminum plate contacts with the outer contour of the forming head during the aluminum plate sheet metal forming process, and the bending roller is rotatable, thereby eliminating the interference of surface friction on the detection of aluminum plate metal bending and following the single variable principle of the test.

Description

Technical Field

[0001] The invention belongs to the technical field of aluminum plate sheet metal bending devices, and specifically relates to an aluminum plate sheet metal bending test fixture. Background Art

[0002] In order to test the mechanical properties of aluminum sheet materials, the existing testing method is to bend and stretch the aluminum sheet before testing; the existing bending device directly bends the aluminum sheet, which causes the aluminum sheet to be subjected to sliding friction during the bending process, wears the surface of the aluminum sheet, and affects the detection of the aluminum sheet material after bending and stretching, that is, friction interferes with the detection of bending, violating the single variable principle of the test; in addition, the aluminum sheet of the existing bending device cannot fit the bending core during the bending process, and the aluminum sheet sample with an ideal rounded corner cannot be obtained; and the bending device has poor structural versatility, and the quality of the aluminum sheet samples obtained by different bending cores varies greatly. The above problems existing in the existing bending devices will seriously affect the test results. Summary of the invention

[0003] The purpose of the present invention is to provide an aluminum plate sheet metal bending test jig, which is intended to solve the problems existing in the background technology.

[0004] To solve the above technical problems, the purpose of the present invention is achieved as follows:

[0005] A bending test fixture for an aluminum plate, comprising:

[0006] Base;

[0007] A bending core, including a forming head, wherein the bending core is detachably fixedly connected to the base so that the bending compression surface of the aluminum plate contacts the outer contour of the forming head during the aluminum plate sheet metal process;

[0008] The bending mechanism includes a bending roller and a bending roller driving mechanism. The bending roller is movably connected to the output end of the bending driving mechanism. The axis of the bending roller is parallel to the extension direction of the forming head. The output end of the bending driving mechanism drives the bending roller to rotate relative to the bending core according to a set center of circle, and the bending and stretching surfaces of the aluminum plate are in contact during the aluminum plate sheet metal process.

[0009] On the basis of the above scheme and as a preferred scheme of the above scheme: the outer contour of the forming head is arc-shaped, and the center of the outer contour of the forming head coincides with the set center of the circle.

[0010] On the basis of the above scheme and as a preferred scheme of the above scheme: it also includes an aluminum plate fixing mechanism, and the aluminum plate fixing mechanism realizes clamping and fixing of the aluminum plate.

[0011] On the basis of the above scheme and as a preferred scheme of the above scheme: the aluminum plate fixing mechanism includes a cam, a cam driving unit, and a pressure block, the output end of the cam driving unit is fixedly connected to the cam, the aluminum plate to be sheet metal is located between the pressure block and the bending core, and the cam driving unit drives the cam to rotate to move the pressure block toward the bending core, thereby clamping the aluminum plate between the pressure block and the bending core.

[0012] On the basis of the above scheme and as a preferred scheme of the above scheme: it also includes a bending core fixing mechanism, and the bending core fixing mechanism detachably fixes the bending core to the base.

[0013] On the basis of the above scheme and as a preferred scheme of the above scheme: the bending core fixing mechanism includes a bending core positioning seat and a bending core clamping part, the bending core is received in the bending core positioning seat, and the output end of the bending core clamping part presses the bending core to limit it in the bending core positioning seat.

[0014] On the basis of the above scheme and as a preferred scheme of the above scheme: the bending core clamping parts are symmetrically arranged with two, and the bending core clamping parts are located at both ends of the extension direction of the axis of the forming head; the bending core clamping parts include a tightening screw, and the tightening screw is threadedly connected to the bending core positioning seat, and tightening the tightening screw can make the head of the tightening screw contact with the bending core.

[0015] On the basis of the above scheme and as a preferred scheme of the above scheme: it also includes a bending roller adjustment mechanism, which is fixedly arranged at the output end of the bending roller driving mechanism, and the bending roller is movably connected to the output end of the bending roller adjustment mechanism. The bending roller changes the parallel distance between the axis of the bending roller and the forming head with the help of the movement of the bending roller adjustment mechanism.

[0016] On the basis of the above scheme and as a preferred scheme of the above scheme: the bending roller adjustment mechanism includes an adjustment screw, and the adjustment screw is threadedly connected to the output end of the bending roller driving mechanism.

[0017] On the basis of the above scheme and as a preferred scheme of the above scheme: it also includes an adjusting slider and a slideway, the adjusting slider is located in the slideway, the bending roller is rotatably connected to the adjusting slider, and the head of the adjusting screw is connected to one end of the adjusting slider away from the bending roller.

[0018] Compared with the prior art, the present invention has the following outstanding and beneficial technical effects: 1. The bending roller is rotatable, eliminating the interference of surface friction on the detection of aluminum sheet metal bending, and following the single variable principle of the test.

[0019] 2. The movement center of the bending roller is concentric with the rounded corner of the forming head of the bending core, so that the aluminum sheet metal always fits the rounded corner surface of the bending core during the bending process, the bending accuracy is higher, and the detection accuracy is improved.

[0020] 3. The position of the bending roller is adjustable. For different bending cores, the movement center of the bending roller can be ensured to be concentric with the fillet of the bending core to obtain high-quality aluminum sheet metal samples. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a half-section diagram of the overall structure of the device;

[0023] Figure 3 It is a cross-sectional view of the bent core. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of this application clearer, the technical solution in the embodiment will be clearly and completely described below in conjunction with the drawings in the embodiment. Obviously, the described embodiment is only a part of the embodiment of this application, not all embodiments. Based on the given embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0025] A bending test fixture for an aluminum plate, comprising:

[0026] Base 10;

[0027] The bending core 20 includes a forming head 21 and a bending core body 22, which are integrally formed. The bending core 20 is detachably fixedly connected to the base 10. During the aluminum sheet metal forming process, the bending compression surface 71 of the aluminum plate 70 contacts the outer contour of the forming head 21.

[0028] The bending mechanism 30 includes a bending roller 31 and a bending roller driving mechanism 32. The bending roller 31 is movably connected to the output end 3231 of the bending driving mechanism 32. The axis of the bending roller 31 is parallel to the extension direction of the forming head 21. The output end 3231 of the bending driving mechanism 32 drives the bending roller 31 to rotate relative to the bending core 20 according to the set center of the circle, and the bending stretching surface 72 of the aluminum plate 70 is in contact during the aluminum plate sheet metal forming process. Through the rotatable roller, the detection interference of surface friction on the bending of the aluminum sheet metal is eliminated, and the single variable principle of the experiment is followed.

[0029] It should be noted that the bending compression surface of the aluminum plate in this embodiment is the surface of the aluminum plate that is squeezed and deformed during the bending process, and the bending tensile surface is the surface of the aluminum plate that is deformed due to the tensile force during the bending process.

[0030] Further preferably, in order to prevent the aluminum sheet metal from being deformed greatly and causing concentrated stress at its bend, the outer contour of the forming head is preferably arc-shaped in this embodiment, so that an arc transition is formed at the bend of the aluminum sheet to solve this problem; in addition, the center of the outer contour of the forming head coincides with the set center, so that during the forming process, the trajectory of the movement of the bending roller 31 is the same as the shape of the outer contour of the forming head, so that better accuracy can be obtained, which is more suitable for test samples with high requirements for rounded corners, thereby improving the accuracy of detection. It should be noted that see Figure 3 , the center position of the fillet A of the bending core structure remains unchanged, and the diameter of the fillet A and the size of the angle B change, so as to ensure that the circle of the fillet A is concentric with the set center of the bending roller.

[0031] In order to facilitate the fixation of the bending core and to facilitate its disassembly and replacement, the present embodiment further includes a bending core fixing mechanism 50 , which detachably fixes the bending core 20 to the base 10 .

[0032] Specifically, the bending core fixing mechanism 50 includes a bending core positioning seat 51 and a bending core clamping portion 52 , the bending core 20 is received in the bending core positioning seat 51 , and the output end of the bending core clamping portion 52 presses the bending core 20 to limit it in the bending core positioning seat 51 .

[0033] The bending core clamping parts 52 are symmetrically arranged with two parts, and the bending core clamping parts 52 are located at both ends of the extension direction of the axis of the forming head 21; the bending core clamping parts 52 include a tightening screw 521, and the tightening screw 521 is threadedly connected to the bending core positioning seat 51. Tightening the tightening screw 521 can make the head of the tightening screw 521 contact with the bending core 20.

[0034] Preferably, an adjustment pad 53 is provided between the bending core 20 and the head of one of the tightening screws 521, so that the adjustment pad 53 can be replaced according to the bending core 20 of different widths, so as to be able to adjust the position of the bending core well and clamp and fix the bending core 20.

[0035] In order to ensure that the aluminum sheet metal always fits the rounded corner surface of the bending core during the bending process and obtain test samples with more required rounded corners, the present embodiment also includes a bending roller adjustment mechanism 40, which is fixed to the output end of the bending roller driving mechanism 30, and the bending roller 31 is movably connected to the output end of the bending roller adjustment mechanism 40. The bending roller 31 changes the parallel distance between the axis of the bending roller 31 and the forming head 21 with the help of the movement of the bending roller adjustment mechanism 40.

[0036] Specifically, in this embodiment, the bending roller adjustment mechanism 40 preferably includes an adjustment screw 41, an adjustment slider 42 and a slideway. The adjustment screw 41 is threadedly connected to the output end of the bending roller drive mechanism. In this embodiment, the slideway is preferably surrounded by fixed plates 43 that are symmetrically arranged on both sides of the slider and symmetrical up and down, so that the adjustment slider 42 can slide in the slideway. The adjustment slider 42 is located in the slideway, and the adjustment slider is symmetrically provided with a connection portion that is rotatably connected to the bending roller 31 at one end away from the adjustment screw 41. A rotating shaft passes through the connection portion and the bending roller 31 so that the bending roller 31 can be rotatably connected to the adjustment slider 42. The distance of the bending roller relative to the bending core is movable and adjustable. For different bending cores, it can be ensured that the center of motion of the roller is concentric with the fillet of the bending core, so as to obtain high-quality aluminum sheet metal samples.

[0037] During the bending process of the aluminum plate, if the aluminum plate is not fixed, the aluminum plate will move or warp, thereby affecting the bending size and causing bending deviation; the present embodiment preferably also includes an aluminum plate fixing mechanism 60, which realizes the clamping and fixing of the aluminum plate 70.

[0038] Specifically, the aluminum plate fixing mechanism 60 includes a cam 61, a cam driving unit 62, and a pressure block 63. The output end of the cam driving unit 62 is fixedly connected to the cam 61. The aluminum plate 70 to be sheet metal is located between the pressure block 63 and the bending core 20. The cam driving unit 62 drives the cam 61 to rotate so that the pressure block 63 moves toward the bending core 20, thereby clamping the aluminum plate between the pressure block 63 and the bending core 20.

[0039] The aluminum plate 70 roller of the aluminum sheet metal bending test fixture of the present application performs circular motion during the bending process, and its movement center coincides with the center of the fillet of the bending core. This movement method can make the inner surface of the aluminum sheet metal fit the bending core during the entire bending process, and the outer surface fillet is radially in contact with the bending roller, so that the inner surface fillet of the aluminum sheet metal is consistent with the fillet of the bending core; at the same time, the outer surface is only subjected to the radial force of the bending roller, eliminating the interference of the friction of the bending roller on the outer surface of the aluminum sheet metal on the bending result of the aluminum sheet metal, following the single variable principle of the test, and obtaining more accurate bending test results.

[0040] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A bending test fixture for aluminum sheet metal, characterized in that: include Base; A bending core, including a forming head, wherein the bending core is detachably fixedly connected to the base, and the bending compression surface of the aluminum plate contacts the outer contour of the forming head during the aluminum plate sheet metal process; The bending mechanism comprises a bending roller and a bending roller driving mechanism, wherein the bending roller is movably connected to the output end of the bending roller driving mechanism, the axis of the bending roller is parallel to the extension direction of the forming head, and the output end of the bending roller driving mechanism drives the bending roller to rotate relative to the bending core according to a set circle center, and the bending and stretching surfaces of the aluminum plate are in contact during the aluminum plate sheet metal process; It also includes an aluminum plate fixing mechanism, which realizes clamping and fixing of the aluminum plate; It also includes a bending core fixing mechanism, which detachably fixes the bending core to the base; The bent core fixing mechanism comprises a bent core positioning seat and a bent core clamping portion, the bent core is received in the bent core positioning seat, and the output end of the bent core clamping portion presses the bent core to limit it in the bent core positioning seat.

2. The aluminum sheet metal bending test fixture according to claim 1, characterized in that: The outer contour of the molding head is in an arc shape, and the center of the outer contour of the molding head coincides with the set center.

3. The aluminum sheet metal bending test fixture according to claim 1, characterized in that: The aluminum plate fixing mechanism includes a cam, a cam driving unit, and a pressure block. The output end of the cam driving unit is fixedly connected to the cam. The aluminum plate to be sheet metal is located between the pressure block and the bending core. The cam driving unit drives the cam to rotate to move the pressure block toward the bending core, thereby clamping the aluminum plate between the pressure block and the bending core.

4. The aluminum sheet metal bending test fixture according to claim 1, characterized in that: The bending core clamping parts are symmetrically arranged with two of them, and the bending core clamping parts are located at two ends of the extending direction of the axis of the forming head; The bending core clamping part comprises a tightening screw, which is threadedly connected to the bending core positioning seat. Tightening the tightening screw can make the head of the tightening screw contact with the bending core.

5. The aluminum sheet metal bending test fixture according to claim 1, characterized in that: It also includes a bending roller adjustment mechanism, which is fixedly arranged at the output end of the bending roller driving mechanism, and the bending roller is movably connected to the output end of the bending roller adjustment mechanism. The bending roller changes the parallel distance between the axis of the bending roller and the forming head by means of the movement of the bending roller adjustment mechanism.

6. The aluminum sheet metal bending test fixture according to claim 5, characterized in that: The bending roller adjustment mechanism comprises an adjustment screw, and the adjustment screw is threadedly connected to the output end of the bending roller driving mechanism.

7. The aluminum sheet metal bending test fixture according to claim 6, characterized in that: It also includes an adjusting slider and a slideway, wherein the adjusting slider is located in the slideway, the bending roller is rotatably connected to the adjusting slider, and the head of the adjusting screw is connected to an end of the adjusting slider away from the bending roller.

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