A method for preparing aluminum alloy profiles for automobile anti-collision beam mechanisms

Abstract

The present invention relates to the field of aluminum alloy profile products, and specifically to a method for preparing an aluminum alloy profile for an automobile anti-collision beam mechanism, comprising the following steps: 1. Taking a metal pipe as a base, welding an aluminum alloy plate along its long end, and forming a welding portion on the outer surface of the metal pipe at one end of the aluminum alloy plate; 2. Taking the welding portion as the initial position, bending the remaining portion of the aluminum alloy plate except the welding portion multiple times, so that the bent aluminum alloy plate covers the metal pipe, and the formed bending line is parallel to the metal pipe; 3. Fixing the end of the aluminum alloy plate to the aluminum alloy plate itself; 4. Screwing and fixing the end of the aluminum alloy plate to the metal pipe. The present invention solves the problem of low production efficiency of existing aluminum alloy profiles used for automobile anti-collision beams, so that the strength requirements can be met in the profile forming stage, and the output efficiency is sufficient.

Description

Technical Field

[0001] The present invention relates to the field of aluminum alloy profile products, and in particular to a method for preparing an aluminum alloy profile for an automobile anti-collision beam mechanism. Background Art

[0002] Existing aluminum alloy profiles are mostly formed by hot-melting aluminum bars and then extruding or molding them. As shown in Chinese patent CN 106807788 A, which was filed on November 30, 2015, a molding method for aluminum alloy profiles is disclosed, which includes the following steps: (1) heating the aluminum bars, heating the diverter die aluminum bars to 500°C ± 10°C, or heating the flat die aluminum bars to 490°C ± 10°C, and keeping them warm for 3-4.5 hours; (2) heating the mold, heating the flat mold to 450°C ± 10°C, or heating the diverter die to 480°C ± 10°C, and keeping them warm for 1.5-2.5 hours; (3) loading the aluminum bars and the mold into an extruder, controlling the extrusion speed of the profile at 110 mm / min, and cooling it to below 170°C by air cooling quenching; wherein the extruder pressure is controlled to be 180 ± 20 kg / m2; (4) further cooling and cutting to obtain the finished product. The above technical solution shows the existing forming process of aluminum alloy profiles;

[0003] Under the development trend of modern vehicles, while meeting the requirements of anti-collision strength, it is necessary to reduce the weight of the vehicle body, so aluminum alloy materials are widely used, and the anti-collision beam on the car is a device used to reduce the absorption of collision energy when the vehicle is hit. In the prior art, such as the Chinese patent application published on September 17, 2019, the structure of the automobile anti-collision beam is disclosed, including a main beam, a telescopic rod and a flange. Telescopic rods are provided at both ends of the main beam, and the telescopic rods are fixed to the front end of the car through the flange. A C-shaped groove is provided on the side of the main beam away from the flange. The upper and lower sides of the C-shaped groove are parallel to each other and perpendicular to the third side. A honeycomb panel is provided in the C-shaped groove, one side of the honeycomb panel is fixed to the third side of the C-shaped groove, and the other side is provided with longitudinal reinforcement ribs. The longitudinal reinforcement ribs are continuous V-shaped and evenly distributed at the open end of the C-shaped groove, and the two ends of the longitudinal reinforcement ribs are respectively fixed to the upper and lower sides of the C-shaped groove.

[0004] Technically, the main beam structure of existing anti-collision beams is mostly a simple single-layer structure. The structural strength of this type of main beam is limited by the characteristics of the material itself. Therefore, in order to improve the structural strength, reinforcing ribs, reinforcement bars and other strength-enhancing components are usually set inside or outside to meet safety requirements.

[0005] Therefore, the main beam structure of the anti-collision beam needs to go through multiple processes to supplement strength reinforcement parts after extrusion molding, so the production efficiency is low. Summary of the Invention

[0006] Therefore, the present invention provides a method for preparing aluminum alloy profiles for automobile anti-collision beam mechanisms, which solves the problem of low production efficiency of existing aluminum alloy profiles used for automobile anti-collision beams, so that the strength requirements can be met in the profile forming stage and sufficient output efficiency can be achieved.

[0007] To achieve the above object, the present invention is achieved through the following technical solutions:

[0008] A method for preparing an aluminum alloy profile for an automobile anti-collision beam mechanism comprises the following steps:

[0009] 1. Take a metal pipe as a base and weld an aluminum alloy plate along its long end. One end of the aluminum alloy plate forms a welded portion on the outer surface of the metal pipe.

[0010] 2. With the welded portion as the initial position, the remaining portion of the aluminum alloy plate except the welded portion is bent multiple times, so that the bent aluminum alloy plate covers the metal tube, and the formed bending line is parallel to the metal tube;

[0011] 3. Fixing the end of the aluminum alloy plate to the aluminum alloy plate itself.

[0012] Preferably, the method further includes step 4, wherein the end of the aluminum alloy plate is screwed and fixed to the metal pipe.

[0013] Preferably, in the above step 2, the aluminum alloy plate is bent multiple times by a bending device, and the length direction of the metal tube during bending is defined as the X-axis direction, the direction perpendicular to the X-axis is defined as the Z-axis, and the direction perpendicular to the X-axis and the Z-axis is defined as the Y-axis. The bending device includes a frame, and a rotating clamping mechanism is mounted on the frame for fixing both ends of the metal tube and rotating the metal tube along its own center.

[0014] A plurality of filler strips are provided on the outer edge of the peripheral side of the rotating clamping mechanism for positioning the bending line during folding, and each of the filler strips is connected to an extension mechanism for driving the filler strip to extend / contract along the X-axis direction;

[0015] The frame is provided with a pressing block for bending the aluminum alloy plate and a bending mechanism for driving the pressing block to reciprocate along the Y-axis direction, and the pressing block cooperates with each of the filler strips to achieve bending of the aluminum alloy plate;

[0016] The bending mechanism or the rotating clamping mechanism is fixedly connected to a lifting mechanism which can move back and forth along the Z-axis direction.

[0017] Preferably, the rotary clamping mechanism includes clamping parts provided at both ends of the metal pipe for being embedded in the ends of the metal pipe, a turntable for driving the clamping parts to rotate, and a rotating assembly for driving the turntable to rotate.

[0018] Preferably, the extending mechanism includes an extending frame for placing the filler strip and an extending assembly for driving the extending frame to extend along the X-axis direction. The extending frame and the extending assembly are fixedly connected to the turntable and can rotate together with the turntable.

[0019] Preferably, the bending mechanism includes a connecting rod fixedly connected to the pressing block and a telescopic assembly driving the connecting rod to reciprocate along the Y-axis direction.

[0020] Preferably, the lifting mechanism includes a base for installing the bending mechanism or the rotary clamping mechanism, and a lifting component for driving the base to move back and forth along the Z-axis direction.

[0021] Preferably, the filler strip is an elastic rubber block or a metal block.

[0022] Preferably, the Z-axis direction is a vertical direction.

[0023] Preferably, the X-axis is a vertical direction.

[0024] By adopting the above technical solution, the beneficial effects of the present invention are:

[0025] This technical solution is a completely different method for preparing aluminum alloy profiles from extrusion. It utilizes metal tubes and folded aluminum alloy plates to form the profiles, which are then fixed together and then formed. The folded aluminum alloy plates structurally form multiple cavities surrounding the metal tubes, which provide excellent cushioning properties and strong energy absorption and deformation capabilities, reducing the impact on pedestrians during collisions and minimizing vehicle losses. The internal metal tubes can be made of materials with advantages such as greater strength or lighter weight, depending on the needs, thereby reducing the overall material cost of the product.

[0026] In terms of adjusting the cushioning performance, the number of bends can be increased or decreased according to demand, thereby increasing or decreasing the number of cavities to achieve cushioning performance adjustment;

[0027] Compared with traditional die extrusion production, this production method produces flexible and changeable product structures. There is no need to change the die according to the product. It can be improved according to demand. By changing the bending position, it can form a large-area plate with a cavity, a stick with a surround structure cavity, etc., which makes the product diverse and highly applicable.

[0028] At the same time, this production method can make full use of traditional materials, and the choice of raw materials is also richer. Different parameters such as the quality, material properties and appearance of metal pipes and aluminum alloy plates can be combined in various ways to form anti-collision beams with different rigidity requirements to meet the use needs of different enterprises. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1Schematic diagram of the forming process of the embodiment of the present invention;

[0030] Figure 2 Schematic diagram of the cross-sectional structure of the product after forming in the embodiment of the present invention;

[0031] Figure 3 Schematic diagram of the structure of the bending device in the main view direction in the embodiment of the present invention;

[0032] Figure 4 Schematic diagram of the positional structure of the metal pipe and the filler strip in the embodiment of the present invention;

[0033] Figure 5 Schematic diagram of the installation structure of the end part of the filler strip in the embodiment of the present invention;

[0034] Figure 6 Schematic diagram of the cross-sectional structure of another product in the embodiment of the present invention.

[0035] Reference numerals: a, metal pipe; a1, welding part; a2, welding point; b, aluminum alloy plate; c, filler strip; 100, frame; 10, rotary clamping mechanism; 11, clamping member; 12, turntable; 121, extending frame; 121a, elastic frame plate; 20, pressing block; 20a, bending mechanism; 30, base; 31, lifting component; d, bolt. Detailed implementation manners

[0036] The following will specifically describe the implementation manners of the present invention in detail, so as to fully understand how the present invention uses technical means to solve technical problems and the implementation process of achieving technical effects and implement accordingly.

[0037] Embodiment

[0038] Reference Figure 1 、 Figure 2 , A preparation method for an aluminum alloy profile of an automobile anti-collision beam mechanism includes the following steps:

[0039] I. Take a metal pipe a as the basis, and weld an aluminum alloy plate b along its long end. A welding part a1 is formed at one end of the aluminum alloy plate b on the outer surface of the metal pipe a; specifically, the metal pipe a is a square pipe with a "day" - shaped cross - section, and the welding part a is formed on one side surface.

[0040] II. Taking the position of the welding part a1 as the initial position, perform eight bends on the remaining part of the aluminum alloy plate b except the welding part a1 (specifically as Figure 2As shown in the figure, during the bending process, the bending direction of the aluminum alloy plate b is adjusted by rotating the metal pipe a, so that the bent aluminum alloy plate b wraps the metal pipe a, and the formed bending line is parallel to the metal pipe a; here, in order to facilitate the metal pipe a to be in the center or near the center position after multiple bends, a bend is made at the edge of the welding part a1;

[0041] Among them, in the above step two, the aluminum alloy plate b is bent multiple times by a bending device. Define the length direction of the metal pipe a during bending as the X-axis direction, the direction perpendicular to the X-axis as the Z-axis, and the direction perpendicular to both the X-axis and the Z-axis as the Y-axis. The overall device has a three-axis motion structure; for example Figure 3 、 Figure 4 、 Figure 5 As shown in the figure, the bending device includes a frame 100, on which a rotary clamping mechanism 10 is erected for fixing the two end parts of the metal pipe a and enabling the metal pipe a to rotate along its own center; among them, the rotary clamping mechanism 10 includes clamping parts 11 provided at both ends of the metal pipe a for embedding in the end parts of the metal pipe a, a turntable 12 for driving the clamping parts 11 to rotate, and a rotating component for driving the turntable 12 to rotate. Specifically, the rotating component is a rotary motor fixed on the turntable 12 and its related transmission parts; the clamping part 11 is a clamping block embedded in one cavity of the "day" - shaped structure inside the metal pipe a;

[0042] Among them, the clamping part 11 can also be other structures, such as a claw structure for clamping the inner wall of the metal pipe a, or an air - expanding shaft structure, etc.;

[0043] A plurality of packing strips c for positioning the bending line during folding are provided on the outer edge of the circumferential side of the rotary clamping mechanism 10. The packing strips c can be elastic rubber blocks or metal blocks;

[0044] Each of the packing strips c is connected with an extending mechanism (not shown in the figure) for driving the packing strip c to extend / contract along the X - axis direction; specifically, the extending mechanism includes an extending frame 121 for placing the packing strip c, and an extending component for driving the extending frame 121 to extend along the X - axis direction. The extending frame 121 and the extending component are both fixedly connected to the turntable 12 and can rotate together with the turntable ; among them, the extending frame 121 is composed of two elastic frame plates 121a, and the packing strip c is clamped by the two elastic frame plates 121a. The structure of the elastic frame plates 121a is convenient for subsequently replacing packing strips c with different sizes and shapes to change the folding position, and thus change the formed product;

[0045] The frame 100 is provided with a pressing block 20 for bending the aluminum alloy plate b and a pressing and bending mechanism 20a for driving the pressing block 20 to reciprocate along the Y-axis direction. The pressing block 20 cooperates with each of the filler strips c to achieve bending of the aluminum alloy plate b. The pressing block 20 and the filler strips c are positioned in a staggered structure. The pressing block 20 is driven by the pressing and bending mechanism 20a to apply force to the aluminum alloy plate b, so that the aluminum alloy plate b forms a bending line along the position of the filler strips c, thereby completing a bending action. Specifically, the pressing and bending mechanism 20a includes a connecting rod fixed to the pressing block 20, a telescopic motor and a transmission member thereof for driving the connecting rod to reciprocate along the Y-axis direction. The telescopic motor and its transmission member may also be replaced by a related linear motion driver such as an oil cylinder.

[0046] The bending mechanism 20a is mounted on a lifting mechanism that can reciprocate along the Z-axis. Here, the lifting mechanism includes a base 30 for mounting the bending mechanism 20a and a lifting assembly 31 for driving the base 30 to reciprocate along the Z-axis. The lifting assembly 31 is a lifting motor and its transmission parts. In this way, during production, by adjusting the lifting mechanism, the bending position of the aluminum alloy plate b can be changed, and products of different sizes and shapes can be flexibly bent.

[0047] It should be noted that the lifting mechanism is fixedly connected to the rotating clamping mechanism 10 to adjust the height of the metal pipe a; either one of the two can be selected here;

[0048] When forming, Figure 1 As shown, the pressing block 20 and the bending mechanism 20a always maintain reciprocating motion in one direction. The specific position of the aluminum alloy plate b during bending is adjusted by rotating the metal tube a by the rotating clamping mechanism 10, and the Z-axis position of the rotating clamping mechanism 10 is changed by the lifting mechanism to adjust the bending position of the aluminum alloy plate b. During bending, the filling strips c (c1, c2, c3, c4) at different positions are pushed out during the bending operation through the action of the extending mechanism and embedded in the side of the aluminum alloy plate b opposite to the pressing block 20 to meet the bending operation.

[0049] 3. The end of the aluminum alloy plate b is fixedly connected to the aluminum alloy plate b itself; welding is adopted here to form a welding point a2; specifically, Figure 2 The figure shows the structure of the aluminum alloy profile after forming;

[0050] This technical solution is a method for preparing aluminum alloy profiles that is completely different from extrusion molding. It uses metal tubes (a) and aluminum alloy plates (b) to fold and securely connect the two to form the profile. The folded aluminum alloy plates (b) structurally form multiple cavities surrounding the metal tubes (a), providing excellent cushioning properties and strong energy absorption and deformation capabilities. This reduces the impact on pedestrians during collisions and minimizes vehicle damage. The internal metal tubes (a) can be made of materials with advantages such as greater strength or lighter weight, depending on the needs, thereby reducing the overall material cost of the product.

[0051] In terms of adjusting the cushioning performance, the number of bends can be increased or decreased according to demand, thereby increasing or decreasing the number of cavities to achieve cushioning performance adjustment;

[0052] Compared with traditional die extrusion production, this production method produces flexible and changeable product structures. There is no need to change the die according to the product. It can be improved according to demand. By changing the bending position, it can form a large-area plate with a cavity, a stick with a surround structure cavity, etc., which makes the product diverse and highly applicable.

[0053] At the same time, this production method can make full use of traditional materials and provide a wider range of raw material choices. The quality, material properties, and shape of the metal tube a and aluminum alloy plate b can be combined in a variety of ways to form anti-collision beams with different rigidity requirements to meet the needs of different companies.

[0054] In this embodiment, the Z-axis direction is the vertical direction; structurally, based on the position of the metal pipe a during processing, the entire equipment is a horizontal structure; therefore, this technical solution can also adopt a vertical structure, in which case the X-axis is the vertical direction.

[0055] In order to further improve the structural strength of the product structure, a fourth step can be added during production to screw the end of the aluminum alloy plate b to the metal pipe a (eg Figure 6 Here, the end of the aluminum alloy plate b is bent to make the end surface thereof, and then a bolt d is provided after a hole is opened to screw it to the metal pipe a. This makes the connection between the aluminum alloy plate b and the metal inner pipe tighter and the structural strength better, but increases the production steps.

[0056] Although the present invention has been particularly shown and described in conjunction with preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made to the present invention without departing from the spirit and scope of the invention as defined in the appended claims, and all such changes are within the scope of protection of the present invention.

Claims

1. A method for preparing an aluminum alloy profile for an automobile anti-collision beam mechanism, characterized in that: The following steps are involved:

1. Take a metal pipe (a) as a base, weld an aluminum alloy plate (b) along its long end, and form a welded portion (a1) on the outer surface of the metal pipe (a); 2. With the weld portion (a1) as the initial position, the remaining portion of the aluminum alloy plate (b) except the weld portion (a1) is bent multiple times, so that the bent aluminum alloy plate (b) covers the metal tube (a), and the formed bending line is parallel to the metal tube (a); In step 2, the aluminum alloy plate (b) is bent multiple times by a bending device, wherein the length direction of the metal tube (a) during bending is defined as the X-axis direction, the direction perpendicular to the X-axis is defined as the Z-axis, and the direction perpendicular to both the X-axis and the Z-axis is defined as the Y-axis. The bending device includes a frame (100), and a rotating clamping mechanism (10) is mounted on the frame (100) for fixing both ends of the metal tube (a) and rotating the metal tube (a) along its own center. The outer edge of the circumference of the rotating clamping mechanism (10) is provided with a plurality of filler strips (c) for positioning the bending line during folding, and each of the filler strips (c) is connected to an extension mechanism for driving the filler strip (c) to extend / contract along the X-axis direction; The frame (100) is provided with a pressing block (20) for bending the aluminum alloy plate (b) and a bending mechanism (20a) for driving the pressing block (20) to reciprocate along the Y-axis direction. The pressing block (20) cooperates with each of the filler strips (c) to achieve bending of the aluminum alloy plate (b). The bending mechanism (20a) or the rotating clamping mechanism (10) is fixedly connected to a lifting mechanism capable of reciprocating along the Z-axis direction; 3. fixing the end of the aluminum alloy plate (b) to the aluminum alloy plate (b); The method further comprises step 4, wherein the end of the aluminum alloy plate (b) is screwed and fixed to the metal pipe (a); The rotary clamping mechanism (10) comprises a clamping member (11) provided at both ends of the metal pipe (a) and embedded in the end of the metal pipe (a), a turntable (12) driving the clamping member (11) to rotate, and a rotating assembly driving the turntable (12) to rotate; The extending mechanism comprises an extending frame (121) for placing the filler strip (c) and an extending assembly for driving the extending frame (121) to extend along the X-axis direction, wherein the extending frame (121) and the extending assembly are both fixedly connected to the turntable (12) and can rotate together with the turntable (12); The extending frame (121) is composed of two elastic frame plates (121a), and the filler strip (c) is clamped by the two elastic frame plates (121a).

2. The method for preparing an aluminum alloy profile for an automobile anti-collision beam mechanism according to claim 1, characterized in that: The bending mechanism (20a) comprises a connecting rod fixedly connected to the pressing block (20) and a telescopic assembly driving the connecting rod to reciprocate along the Y-axis direction.

3. The method for preparing an aluminum alloy profile for an automobile anti-collision beam mechanism according to claim 1, characterized in that: The lifting mechanism comprises a base (30) for mounting the bending mechanism (20a) or the rotary clamping mechanism (10), and a lifting component (31) for driving the base (30) to reciprocate along the Z-axis direction.

4. The method for preparing an aluminum alloy profile for an automobile anti-collision beam mechanism according to any one of claims 1 to 3, characterized in that: The filler strip (c) is an elastic rubber block or a metal block.

5. The method for preparing an aluminum alloy profile for an automobile anti-collision beam mechanism according to any one of claims 1 to 3, characterized in that: The Z-axis direction is a vertical direction.

6. The method for preparing an aluminum alloy profile for an automobile anti-collision beam mechanism according to any one of claims 1 to 3, characterized in that: The X-axis is the vertical direction.

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