A manufacturing method for forming and straightening large-angle corner pillars

Abstract

This invention relates to a method for forming and straightening large-angle end corner pillars, comprising the following steps: selecting a 130mm elastic shrinkage mold, using a hammer speed of 300 impacts per minute, and maintaining a working pressure not exceeding 24N. During processing, the working pressure is gradually increased, and multiple cycles of working pressure are performed to achieve good forming. A template is used to detect changes in the arc shape. This method for forming and straightening large-angle end corner pillars is suitable for processing and forming special locations such as end corner pillars, achieving good forming results and providing guidance for subsequent vehicle model manufacturing.

Description

Technical Field

[0001] This invention relates to the field of sheet metal processing and forming technology, and in particular to a method for forming and straightening large-angle end corner pillars. Background Technology

[0002] Sheet metal processing is a comprehensive cold working process for thin metal sheets (usually less than 6mm), including shearing, punching, bending, welding, riveting, die forming, and surface treatment. Its most significant characteristic is that the thickness of the same part is consistent. Sheet metal blanking methods mainly include CNC punching, laser cutting, shearing machines, and die blanking. CNC is currently the most common method, laser cutting is mostly used in the prototyping stage, and die blanking is mostly used for mass production.

[0003] The corner pillars are machined in special locations. After being subjected to stress on the 84mm coaxial surface during machining, they undergo shrinkage deformation, while the 80mm vertical edge warps. Current methods involve adjusting the working pressure through several mold changes to achieve good molding. However, due to the 3mm thickness of the corner pillar material, the molding difficulty increases, and continuing to use previous methods will make it difficult to achieve good molding.

[0004] Currently, the universal sheet metal forming machine (vibrating hammer) does not have mature technology for processing 3mm thick SUS301L-ST grooved parts with an angle greater than 5°. Summary of the Invention

[0005] The present invention aims to solve the technical problems in the prior art and provide a manufacturing method for forming and correcting large-angle end corner pillars.

[0006] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0007] A method for manufacturing a large-angle corner column forming and straightening system includes the following steps:

[0008] Select a 130mm elastic shrinkage template, hammer speed of 300 impacts per minute, working pressure not exceeding 24N, and gradually increase the working pressure feed speed during processing. Achieve good forming through multiple cycles of working pressure, and use a template to check the arc change.

[0009] The above technical solution includes the following steps in the method for forming and correcting large-angle corner pillars:

[0010] Step 1: Place the corner post processing area on a ￠130mm shrink forming mold, adjust the working pressure to 15N, and the hammer speed to 300 impacts per minute. The corner post processing surface will deform, the angle will be measured to be 5°, the corner post vertical edge will warp, the bottom surface gap will be no less than 15mm, and the template inspection arc gap will be no less than 20mm.

[0011] Step 2: Place the corner post processing area on the ￠80mm extension mold, adjust the working pressure to 19N, control the working pressure to extend the vertical edge of the corner post, and place the bottom edge on the platform;

[0012] Step 3: Place the corner post on the ￠130mm shrink mold, with a working pressure of 20N. The arc of the corner post will change, and the angle will be measured at 7.5°. The vertical edge of the corner post will warp and deform, and the bottom gap will be no less than 10mm. The arc gap of the template will be no less than 11mm.

[0013] Step 4: Place the corner post processing area on the ￠80mm extension mold, adjust the working pressure to 21N, control the working pressure to extend the vertical edge of the corner post, the corner post will be twisted and deformed, the corner twist is 3.2°, and the bottom surface gap is not less than 4mm;

[0014] Step 5: Use a non-rebound hammer to adjust the deformation of the machining area and release stress;

[0015] Step 6: Place the corner post processing area on the ￠80mm shrink mold, with a working pressure of 24N. The corner post arc changes, the angle is measured to be 8.9°, the corner post vertical edge warps and deforms, the bottom surface gap is not less than 5mm, and the template inspection shows that the arc gap is not less than 1mm.

[0016] Step 7: Place the corner post processing area on the ￠80mm extension mold, adjust the working pressure to 22N, control the working pressure to extend the vertical edge of the corner post, and place the bottom edge on the platform.

[0017] In the above technical solution, the end corner post that meets the requirements is placed on the platform, and the perpendicularity of the vertical edge to the bottom surface is checked with a right angle ruler, and the test result is ≤0.3mm.

[0018] In the above technical solution, the end corner posts that meet the requirements are placed on the platform, and the arc is tested with a template, with a gap of ≤0.2mm.

[0019] In the above technical solution, the end corner post that meets the requirements is placed on the platform, and the flatness of the bottom surface is measured with a feeler gauge to be ≤0.3mm.

[0020] In the above technical solution, before step 1, there is a step: after the material is formed, a notch is opened on one of the shorter planes at the small arc position.

[0021] The present invention has the following beneficial effects:

[0022] The large-angle end corner pillar forming and straightening manufacturing method of the present invention can achieve good forming for special positions such as end corner pillars, and can play a guiding role in subsequent vehicle processing and production. Attached Figure Description

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0024] Figure 1 This is a schematic diagram of the steps in the manufacturing method for forming and correcting large-angle corner pillars according to the present invention. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings.

[0026] like Figure 1 As shown, the large-angle end-corner column forming and correction manufacturing method of the present invention, before CNC laser cutting, opens a notch on one of the shorter planes at the small arc position after the material is formed, to ensure that the vibrating hammer mold does not interfere with the material during forming.

[0027] Select the vibratory hammer forming mold according to the product drawings and materials, and adjust the working pressure. First, select a ￠130mm elastic shrinkage template, with a hammer speed of 300 impacts per minute and a working pressure not exceeding 24N. During processing, the working pressure feed speed should be increased from small to large. After several cycles of working pressure, a good forming condition can be obtained. Use a template to check the arc change.

[0028] The corner post is machined in a special location. After being subjected to stress on the 84mm non-convex surface during machining, it shrinks and deforms. At the same time, the 80mm vertical edge warps. To repair the deformation of the vertical edge, a ￠80 elastic extension template is used for material placement. The working pressure is 21N. The arc change in the deformed area is detected using a template. During the inspection, the corner post has a gap of 2~3mm. After changing the mold, a ￠80 elastic shrinkage template is used for local precise forming. The working pressure is controlled. The special curvature radius arc is measured with a template. The gap is ≤0.2mm. The flatness of the bottom surface is ≤0.3mm when checked with a feeler gauge. The flatness of the bottom surface and the perpendicularity of the vertical edge are ≤0.3mm when checked with a right-angle ruler. The machined corner post meets the requirements of the process drawings.

[0029] The large-angle end-corner column forming and straightening manufacturing method of the present invention will be described in detail below.

[0030] Before CNC laser cutting, analyze the drawings and draw the unfolded diagram. After the material is formed, make a notch on the shorter plane of the small arc position to ensure that the vibratory hammer mold does not interfere with the material during the forming process.

[0031] Based on the process drawings and material specifications of the corner post, select the forming mold, starting with a ￠130mm elastic shrinkage template. Adjust the working pressure to no more than 24N, and the hammer speed to 300 impacts per minute. During processing, select a working pressure and feed speed that gradually increase.

[0032] 1. Place the corner post processing area on a ￠130mm shrink forming mold, adjust the working pressure to 15N, and the hammer speed to 300 impacts per minute. The corner post processing surface will deform, and the angle will be measured at 5°. At the same time, the corner post vertical edge will warp and deform, with a 15mm gap on the bottom surface and a 20mm arc gap on the template.

[0033] 2. Place: Place the processing area of ​​the corner post on the ￠80mm extension mold, adjust the working pressure to 19N, control the working pressure to extend the vertical edge of the corner post, and place the bottom edge on the platform.

[0034] 3. Shrink; Place the corner post on the ￠130mm shrink mold, with a working pressure of 20N. The arc of the corner post changes, and the angle is measured to be 7.5°. At the same time, the vertical edge of the corner post warps and deforms, with a 10mm gap on the bottom surface and an 11mm gap on the sample.

[0035] 4. Place the corner post processing area on the ￠80mm extension mold, adjust the working pressure to 21N, control the working pressure to extend the vertical edge of the corner post, the corner post will be twisted and deformed, the corner twist is 3.2°, and the bottom gap is not less than 4mm.

[0036] 5. Adjustment: Use a non-rebound hammer to adjust the deformation of the processing area, and use the hammer spreading method to release stress.

[0037] 6. Finishing: Place the processing area of ​​the corner post on the ￠80mm shrink mold, with a working pressure of 24N. The arc of the corner post changes, and the angle is measured to be 8.9°. At the same time, the vertical edge of the corner post warps and deforms, with a 5mm gap on the bottom surface and a 1mm gap in the arc of the template.

[0038] 7. Placement: Place the processing area of ​​the corner post on the ￠80mm extension mold, adjust the working pressure to 22N, control the working pressure to extend the vertical edge of the corner post, and place the bottom edge on the platform.

[0039] The formed rear corner post is placed on the platform. The arc is checked with a template, and the gap is ≤0.2mm. The flatness of the bottom surface is checked with a feeler gauge, and the gap is ≤0.3mm. The perpendicularity of the vertical edge to the bottom surface is checked with a right angle ruler, and the gap is ≤0.3mm, which meets the requirements of the drawing.

[0040] The large-angle end corner pillar forming and straightening manufacturing method of the present invention can achieve good forming for special positions such as end corner pillars, and can play a guiding role in subsequent vehicle processing and production.

[0041] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A method of manufacturing a large angle end corner post forming correction, characterized by, Comprising the following steps: Step 1: Place the end corner column processing area on a 130 mm shrinkage forming die, adjust the working pressure to 15 N, the hammer speed is 300 times per minute, the impact force, the end corner column processing surface is deformed, the angle measurement is 5°, the end corner column vertical edge is warped, the bottom surface flash is not less than 15 mm, and the sample plate detects the arc flash of not less than 20 mm; Step 2: Place the end corner column processing area on a 80 mm extension die, adjust the working pressure to 19 N, control the working pressure to extend the end corner column vertical edge, and the bottom edge is attached to the platform; Step 3: Place the end corner column on a 130 mm shrinkage die, the working pressure is 20 N, the end corner column arc changes, the angle measurement is 7.5°, the end corner column vertical edge is warped, and the bottom surface flash is not less than 10 mm, and the sample plate detects the arc flash of not less than 11 mm; Step 4: Place the end corner column processing area on a 80 mm extension die, adjust the working pressure to 21 N, control the working pressure to extend the end corner column vertical edge, and the end corner column produces a twisted deformation, the corner twist is 3.2°, and the bottom surface flash is not less than 4 mm; Step 5: Use a non-rebound hammer to adjust the processing area deformation and release the stress; Step 6: Place the end corner column processing area on a 80 mm shrinkage die, the working pressure is 24 N, the end corner column arc changes, the angle measurement is 8.9°, the end corner column vertical edge is warped, and the bottom surface flash is not less than 5 mm, and the sample plate detects the arc flash of not less than 1 mm; Step 7: Place the end corner column processing area on a 80 mm extension die, adjust the working pressure to 22 N, control the working pressure to extend the end corner column vertical edge, and the bottom edge is attached to the platform.

2. The large-angle corner-post forming correction manufacturing method according to claim 1, characterized by, Place the end corner column that meets the requirements on the platform, and use a right angle ruler to detect the perpendicularity of the vertical edge to the bottom surface, and the detection is ≤0.3 mm.

3. The large-angle corner-post forming correction manufacturing method according to claim 1, characterized by, Place the end corner column that meets the requirements on the platform, and use a sample plate to detect the arc, and the flash is ≤0.2 mm.

4. The large-angle corner-post forming correction manufacturing method according to claim 1, characterized by, Place the end corner column that meets the requirements on the platform, and use a feeler gauge to detect the flatness of the bottom surface, and the detection is ≤0.3 mm.

5. The large-angle corner-post forming correction manufacturing method according to any one of claims 1 to 4, characterized by, Before Step 1, there is also a step: after the material is formed, a small arc position is opened on the shorter plane.

Images