Filling method for solving bending and wrinkling of open aluminum profiles, adjustable and recyclable

Abstract

An adjustable and recyclable filling method for solving the bending and wrinkling of open aluminum profiles. The filling steps are as follows: 1) According to the size of the open-profile, set the height dimension of the filling device to ensure that the gap between the filling device and the inner wall of the open-profile is 0.3 - 1 mm. The filling device includes an upper metal sheet and a lower metal sheet, and the upper metal sheet and the lower metal sheet are arranged in parallel. Along the length direction between the upper metal sheet and the lower metal sheet, there are multiple filling blocks. Adjacent filling blocks are spaced by polyurethane spacer blocks. The multiple filling blocks and the polyurethane spacer blocks are fixed in series by a flexible steel wire rope to form an integral filling block string. 2) Place the filling block string along the length direction of the open-profile inside the open-profile, and the length of the filling block string should reach the bending length of the open-profile. 3) Plug an upper metal sheet and a lower metal sheet at the upper and lower ends of the filling block string respectively. This method has simple filling operation and good filling effect.

Description

Technical Field

[0001] The present invention relates to the technical field of metal processing, and specifically to a method for solving the bending and wrinkling of open aluminum profiles, using a filling device that is adjustable and reusable. Background Art

[0002] Due to a series of excellent characteristics of aluminum alloy pipes, such as high strength, light weight, and good heat dissipation performance, their bent parts are widely used as structural parts in the fields of aviation, aerospace, ships, automobiles, etc. However, due to their thin wall thickness and hollow interior, under the huge load during the bending process, affected by tensile and compressive stresses, the deformation is uneven, and serious cross-sectional distortion will occur, such as cross-sectional depression and protrusion, resulting in uneven surface of the bent part along the circumferential direction, which cannot meet the cross-sectional shape and dimensional accuracy of the raw material.

[0003] During the production of automobiles, according to the requirements of the automobile model, enterprises usually need to draw and bend aluminum alloy profiles. During the drawing and bending process, in order to prevent defects such as wear and depression at the drawn and bent parts, it is necessary to fill objects in the aluminum alloy profiles to avoid this phenomenon. In the existing technology of our enterprise, PE boards are usually purchased as fillers. PE boards are not only expensive but also have a limited number of uses, resulting in waste of costs. And through long-term use, the profiles at the aluminum alloy drawn and bent parts are prone to defects such as wear and depression. In view of the above existing defects, on the basis of traditional aluminum alloy bending forming, fillers extruded from a PVC-based substrate are used to replace PE boards, and internal pressure support is realized during bending forming to control the cross-sectional deformation of aluminum alloy, thereby saving costs, avoiding a large amount of waste, and improving the efficiency of drawing and bending.

[0004] However, during the bending production of open profiles, the filling method often used is filling with PP boards. After filling and bending with PP boards, not only can the PP boards not return to their original state, which is not conducive to subsequent filling, but also due to the low modulus of PP boards, they cannot be filled well, resulting in wrinkling after bending. Therefore, a method suitable for filling and bending of open profiles is needed. Summary of the Invention

[0005] The purpose of the present invention is a filling method for solving the bending and wrinkling of open aluminum profiles that is adjustable and reusable. This filling method for solving the bending and wrinkling of open aluminum profiles is easy to operate, has good filling effect, prevents the profiles from bending and wrinkling due to insufficient filling ability, and the filling device used can be reused with low cost.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A filling method for solving the bending and wrinkling of open aluminum profiles that is adjustable and reusable, and the filling steps are as follows:

[0008] 1) Set the height dimension of the filling device according to the size of the open-profile, ensuring that the height of the filling device is less than the distance between the inner walls of the open-profile by 0.3 - 1 mm. The filling device includes an upper metal sheet and a lower metal sheet, which are arranged in parallel. Along its length direction, multiple filling blocks are arranged between the upper metal sheet and the lower metal sheet. Adjacent filling blocks are spaced by polyurethane spacer blocks. The multiple filling blocks and polyurethane spacer blocks are fixed in series as a whole by a flexible steel wire rope to obtain a filling block string. The polyurethane spacer block can also be replaced by other spacer blocks with certain materials. The thicknesses of the upper metal sheet and the lower metal sheet are 1 - 2 mm respectively, and they are iron sheets or steel sheets.

[0009] 2) Place the filling block string along the length direction of the open-profile inside the open-profile, and the length of the filling block string should reach the bending length of the open-profile.

[0010] 3) Insert an upper metal sheet and a lower metal sheet respectively between the upper and lower ends of the filling block string and the inner cavity of the open-profile, then the filling before the bending of the open-profile can be completed. The purpose of setting the upper metal sheet and the lower metal sheet is to prevent damage to the inner wall of the open-profile during the bending process of the filling block. After the open-profile is bent, the flexible steel wire rope can be pulled to take out the filling block string, and then the upper metal sheet and the lower metal sheet can also be taken out. Or after removing the flexible steel wire rope first, the filling blocks and polyurethane spacer blocks can be taken out one by one, and then it can be used for filling before the bending of another open-profile.

[0011] Further preferably: The filling block is a filling block made of metal material, such as an aluminum block or a steel block, etc.

[0012] Further preferably: The filling block is a rectangular block with rounded ends at both ends, which is convenient for the removal of the filling block after the open-profile is bent.

[0013] Further preferably: The filling blocks are divided into threaded counterbore filling blocks and non-counterbore filling blocks, that is, some filling blocks are provided with threaded counterbores. Both the threaded counterbore filling blocks and the non-counterbore filling blocks are provided with wire rope holes for passing the flexible steel wire rope. The threaded counterbore filling blocks are provided with threaded counterbores, and set screws for fixedly connecting the wire rope holes and the threaded counterbore filling blocks are installed in the threaded counterbores. During operation, pass the flexible steel wire rope through the wire rope holes, arrange the filling blocks and polyurethane spacer blocks at intervals and connect them in series. To ensure that the flexible steel wire rope maintains an appropriate tightness, a threaded counterbore filling block is arranged at a certain distance. Use the set screw to fixedly connect the threaded counterbore filling block with the steel wire rope, and connect them in series in turn until reaching the bending length of the open-profile.

[0014] Further preferably: The number of the wire rope holes is two, which are respectively located in the middle of the side surfaces at both ends of the filling block.

[0015] Further preferably, the polyurethane spacer block is cylindrical, and a wire rope hole for passing a flexible wire rope is penetrated through the cylinder body. The polyurethane spacer block is vertically arranged with the filling block. When the number of wire rope holes on the filling block is two, the number of polyurethane spacer blocks is also two, and the wire rope holes on the polyurethane spacer block correspond to the wire rope holes on the filling block.

[0016] The filling method for solving the problem of adjustable bending and wrinkling and recyclable use of the open aluminum profile is set for bending the open profile. It is easy to operate and has a good filling effect. The two filling blocks are spaced by a polyurethane spacer block for width adjustment to achieve flexible filling. While meeting the bending production requirements, it prevents the open profile from bending and wrinkling due to insufficient filling capacity, and the filling device used can be reused repeatedly with low cost. Description of the Drawings

[0017] Figure 1 It is a schematic installation structure diagram of the filling device adopted;

[0018] Figure 2 is Figure 1 the left view schematic diagram of

[0019] Figure 3 It is a three-dimensional structure schematic diagram of the filling block with a countersunk threaded hole;

[0020] Figure 4 It is a structure schematic diagram of the filling block with a countersunk threaded hole;

[0021] Figure 5 is Figure 4 the left view schematic diagram of

[0022] Figure 6 It is a three-dimensional structure schematic diagram of the filling block;

[0023] Figure 7 It is a structure schematic diagram of the polyurethane spacer block;

[0024] Figure 8 It is a comparison diagram of the product filled by this method and the product filled by the traditional method;

[0025] The names corresponding to the serial numbers in the figure are:

[0026] 1. Open profile; 2. Lower metal sheet; 3. Set screw; 4. Filling block with threaded countersunk hole; 5. Filling block without countersunk hole; 6. Flexible wire rope; 7. Polyurethane spacer block; 8. Upper metal sheet; 9. Threaded countersunk hole; 10. Wire rope hole. Detailed Implementation Modes

[0027] To better understand the above objects, features, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0028] Embodiment 1

[0029] The high-strength flexible filling of the open-profile can be completed by the following steps:

[0030] 1) According to the size of the open-profile 1, set the height dimension of the filling device to ensure that the height of the filling device is less than the distance between the inner walls of the open-profile 1 by 0.3 - 1 mm; the filling device includes a lower metal sheet 2 and an upper metal sheet 8, the lower metal sheet 2 and the upper metal sheet 8 are arranged in parallel, and a plurality of filling blocks are arranged between the lower metal sheet 2 and the upper metal sheet 8 along their length directions. Adjacent filling blocks are spaced by polyurethane spacer blocks 7, and the plurality of filling blocks and the polyurethane spacer blocks 7 are fixed as a whole by a flexible steel wire rope 6 in series to obtain a filling block string.

[0031] 2) Place the filling block string along the length direction of the open-profile 1 in the open-profile 1, and the length of the filling block string should reach the bending length of the open-profile 1.

[0032] 3) Insert a lower metal sheet 2 and an upper metal sheet 8 respectively between the upper and lower ends of the filling block string and the inner cavity of the open-profile 1, and the filling before the bending of the open-profile 1 can be completed.

[0033] The filling block is a rectangular filling block made of metal material, with rounded ends at both ends, such as an aluminum block or a steel block, etc.

[0034] The filling blocks are divided into threaded counterbore filling blocks 4 and non-counterbore filling blocks 5. Both the threaded counterbore filling blocks 4 and the non-counterbore filling blocks 5 are provided with wire rope holes 10 for passing through the flexible steel wire rope 6. The threaded counterbore filling blocks 4 are provided with two threaded counterbores 9, which are respectively located in the middle of the side surfaces at both ends of the filling block. Set screws 3 for fixedly connecting the wire rope hole 10 and the threaded counterbore filling block 4 are installed in the threaded counterbores 9.

[0035] The polyurethane spacer block 7 is cylindrical, and the number of polyurethane spacer blocks 7 is also two. The cylindrical body is penetrated with a wire rope hole 10 for passing through the flexible steel wire rope 6. The wire rope hole 10 on the polyurethane spacer block 7 corresponds to the wire rope hole 10 on the filling block, and the polyurethane spacer block 7 is arranged perpendicular to the filling block.

[0036] Application Example

[0037] 1. In the first half of 2021, a certain aluminum industry company had an order for the production of 1,000 open-profile bends. After filling with the high-strength flexible filling method of this application and then bending, the filling device used can be reused, and no wrinkling phenomenon occurred at the bending part, and the qualified rate of bending reached 100%. According to the orders produced previously, the traditional profile filling method cannot avoid the wrinkling phenomenon at the bending part during bending. The commonly used traditional filling method is to pad a rubber pad outside the aluminum profile or fill the inner cavity of the aluminum profile with engineering plastics.

[0038] As mentioned above, it is only a preferred embodiment of the present invention, and it is not a limitation of the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. An adjustable and recyclable filling method for solving the bending and wrinkling of open aluminum profiles, Characterized in that: The filling steps are as follows: 1) According to the size of the open-profile (1), set the height dimension of the filling device to ensure that the height of the filling device is 0.3 - 1 mm less than the distance between the inner walls of the open-profile (1); the filling device includes a lower metal sheet (2) and an upper metal sheet (8), the lower metal sheet (2) and the upper metal sheet (8) are arranged in parallel, and multiple filling blocks are arranged along the length direction between the lower metal sheet (2) and the upper metal sheet (8). Adjacent filling blocks are spaced by a polyurethane spacer block (7). The multiple filling blocks and the polyurethane spacer block (7) are fixed in series as a whole by a flexible steel wire rope (6) to obtain a filling block string; the thicknesses of the upper metal sheet (8) and the lower metal sheet (2) are 1 - 2 mm respectively, and they are iron sheets or steel sheets; 2) Place the filling block string along the length direction of the open-profile (1) inside the open-profile (1), and the length of the filling block string should reach the bending length of the open-profile (1); 3) Insert a lower metal sheet (2) and an upper metal sheet (8) respectively between the upper and lower ends of the filling block string and the inner cavity of the open-profile (1), then the filling before the bending of the open-profile (1) can be completed; after the open-profile is bent, pull the flexible steel wire rope (6) to take out the filling block string, and then also take out the upper metal sheet (8) and the lower metal sheet (2), or first remove the flexible steel wire rope (6), and then take out the filling blocks and the polyurethane spacer blocks one by one, which can be used for filling before the bending of another open-profile; The filling block is a filling block made of metal material; the filling block is a rectangular block with rounded ends; the filling blocks are divided into threaded counterbore filling blocks (4) and non-counterbore filling blocks (5). Threaded counterbore filling blocks (4) and non-counterbore filling blocks (5) are both provided with wire rope holes (10) for passing through the flexible steel wire rope (6). The threaded counterbore filling block (4) is provided with a threaded counterbore (9), and a set screw (3) for fixedly connecting the wire rope hole (10) and the threaded counterbore filling block (4) is installed in the threaded counterbore (9). During work, pass the flexible steel wire rope through the wire rope hole, arrange the filling blocks and the polyurethane spacer blocks at intervals and connect them in series. To ensure that the flexible steel wire rope maintains an appropriate tightness, a threaded counterbore filling block is arranged at a certain distance. Use a set screw to fixedly connect the threaded counterbore filling block to the steel wire rope, and connect them in series in turn until the bending length of the open-profile is reached; the number of the wire rope holes (10) is two, which are respectively located in the middle of the side surfaces at both ends of the filling block; the polyurethane spacer block (7) is cylindrical, and the cylinder body is penetrated with a wire rope hole (10) for passing through the flexible steel wire rope (6). The polyurethane spacer block (7) is arranged perpendicular to the filling block. When the number of wire rope holes on the filling block is two, the number of polyurethane spacer blocks is also two, and the wire rope holes on the polyurethane spacer block correspond to the wire rope holes on the filling block.

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