Springback control method for flanging process of high-strength steel plate
A technology of high-strength steel plate and control method, applied in the field of stamping and forming, can solve problems such as reducing the springback value, and achieve the effects of reducing the springback value, prolonging the life of the mold, and improving the warpage of the side wall
Inactive Publication Date: 2020-10-30
CHINA FIRST AUTOMOBILE +1
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Problems solved by technology
[0007] The invention provides a springback control method in the flanging process of high-strength steel plates. The method not only reduces the springback value after flanging, improves side wall warpage, but is also easy to implement, convenient for on-site debugging and production, and prolongs the length of the mold. service life, reduce mold repair costs, and solve the above-mentioned problems existing in the springback of existing high-strength steel plates
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[0043] It is applied in the flanging process of high-strength steel plate parts in a certain project. The parts are characterized by high-strength steel and S-shaped.
[0044] Include the following steps:
[0045] 1) When the flanging action starts, after the pressing plate 2 presses the sheet material 5, the first contact material fillet R1 in the core working area of the flanging die 3 starts to touch the material, producing an effect of pre-bending in advance;
[0046] 2) The chamfering area of the flanging die 3 gently passes over the sheet material to gradually pour into the sheet material 5;
[0047] 3) The second contact material fillet R2 in the core working area of the flanging die 3 contacts the sheet material 5 until the mold bottoms out to complete the flanging action.
[0048] The flanging die 3 should maintain a contact state, wherein the vertical height H2 of the core working area of the flanging die 3=16mm, and the included angle θ=30° of the core work...
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The invention belongs to the technical field of punch forming, in particular to a springback control method for the flanging process of a high-strength steel plate. The method comprises the followingsteps that (1) after the flanging action begins and a pressure plate presses the plate, a first fillet angle R1 of a flanging concave die begins to touch the plate to creating a pre-bending effect; (2) the chamfered area of the flanging concave die gently passes through the plate to play the role of gradually pouring into the plate; and (3) the second fillet angle R2 of the flanging concave die begins to touch the plate until the die reaches the bottom to complete the flanging action. The method reduces the springback value after flanging and improves the warping of a side wall. Meanwhile, themethod is easily realized, is convenient for site commissioning and production, prolongs the service life of the die, reduces the die repair cost, and solves the problems existing in the springback of the existing high-strength steel plate.
Description
technical field [0001] The invention belongs to the technical field of punching and forming, and in particular relates to a springback control method of a high-strength steel plate flanging process. Background technique [0002] In recent years, energy saving, environmental protection, lightweight and safety are the main development trends of the automobile manufacturing industry. The application of high-strength steel in the automotive industry also occupies a certain position. However, due to its high strength and poor formability, springback and warpage are prone to occur during the stamping process, and the dimensional accuracy of the parts is difficult to achieve the expected effect. [0003] Therefore, research on the springback control of high-strength steel plates has always been a hot issue in the industry. In the past industrial production, the flanging of parts mainly used ordinary circular die fillets. In the process of debugging and actual production, the spri...
Claims
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Login to View More IPC IPC(8): B21D19/08B21D37/10B21D43/00
CPCB21D19/08B21D37/10B21D43/003
Inventor 张鑫张永亮任伟王强陈文峰崔爱豹王济泽张军郭晓东罗曦
Owner CHINA FIRST AUTOMOBILE