Stamping computer simulation calculating method with consideration of mold deformation
A technology of computer simulation and calculation method, applied in the direction of calculation, special data processing applications, instruments, etc., can solve the problem of low accuracy of high-strength steel stamping CAE, and achieve the effect of improving the accuracy of simulation calculation
Inactive Publication Date: 2015-12-23
湖南大捷智能装备有限公司
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[0004] In order to overcome the problem of low CAE accuracy of high-strength steel stamping due to the neglect of the influence of mold deformation on formability in the traditional steel stamping analysis method of the above-mentioned prior art where the mold body is a rigid body, the present invention provides a consideration The advanced high-strength steel stamping computer simulation method of mold deformation, by considering the mold body as an elastic-plastic body, considers the influence of mold deformation on the formability of advanced high-strength steel plates during the stamping process, and establishes a numerical simulation with higher accuracy and more suitable for stamping of advanced high-strength steel plates analysis method
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[0029] Further description will be made below in conjunction with examples and accompanying drawings.
[0030] like figure 1 As shown, a stamping computer simulation calculation method considering the deformation of the mold includes the following steps:
[0031] Step 1: Build the mold model:
[0032] Simplify the mold structure based on the force of the mold, and use the actual drawing gap value generated by the deformation of the mold to offset the drawing surface, use the offset surface to cut the upper mold, and establish a mold model with the actual gap between the convex and concave molds;
[0033] Step 2: meshing the mold model constructed in step 1;
[0034] Perform finite element three-dimensional mesh division on the mold model, and import the divided mold into the finite element software Dynaform;
[0035] Among them, the grid size range is 2-10mm;
[0036] Step 3: In the finite element software Dynaform, mesh the sheet metal of the mold. The sheet metal element...
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The invention provides a stamping computer simulation calculating method with consideration of mold deformation. The method comprises the following steps of: a step 1, building a mold model; a step 2, performing mesh division for the mold model built in the step 1; a step 3, performing mesh division for sheet material of the mold in a finite element software Dynaform, and setting stamping process parameters and material property parameters of the mold; and a step 4, setting state of motion of a convex mold, a concave mold and a pressure plate through a finite element pre-processing software hypermesh, performing elastomeric setting for the mold, completing finite element simulation of the stamping process, and obtaining a stress strain result of the mold and a sheet material molding result. In comparison with the prior art, in the method provided by the invention, while performing numerical simulation of sheet material molding, the mold is set as an elastoplastic deformation body, influence of mold deformation on numerical simulation of sheet material molding is considered, and an analysis method which has higher precision and is more suitable for stamping numerical simulation of high strength steel plates is established..
Description
technical field [0001] The invention belongs to the technical field of stamping dies for automobile cover parts, and in particular relates to a stamping computer simulation calculation method considering the deformation of the die. Background technique [0002] With the development of modern automobiles, people have new requirements for automobile safety and fuel economy. Advanced high-strength steel plates have high strength and elongation, which are suitable for the automotive industry's requirements for lightweight and crash safety, and are more widely used in car bodies. In the conventional stamping CAE simulation calculation of ordinary sheet metal, since the forming force of the sheet metal has little effect on the deformation of the mold, the mold is generally regarded as a rigid body model and can obtain higher calculation accuracy. However, due to the high yield strength of advanced high-strength steel plates, the required forming force increases and the force on t...
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IPC IPC(8): G06F17/50
Inventor 谢晖李志彪谢贵林
Owner 湖南大捷智能装备有限公司
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