Compensation method for elastic deformation of pressing ring component of drawing mold
A technology of elastic deformation and compensation method, applied in geometric CAD, design optimization/simulation, etc., can solve the problems that the compensation value and deflection deformation value cannot be guaranteed to be consistent, so as to reduce the workload of surface research and matching and improve the coloring rate , The effect of shortening the debugging cycle
Active Publication Date: 2020-07-17
CHINA FIRST AUTOMOBILE +1
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Problems solved by technology
This method is an approximate compensation method for deflection deformation, and its disadvantage is that only a limited number of reference points are selected as reference points to drive the surface deformation, and it cannot be guaranteed that the compensation value of the rest of the reference points is consistent with the deflection deformation value
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[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments described here are only used to explain the invention, not to limit the invention.
[0031] Take the binder ring part of the fender drawing die of a certain car model as an example. The material is GGG70L cast iron, and the theoretical binder force is 1200kN. Such as Figure 4 As shown, the compensation method of the present invention for the elastic deformation of the drawing die binder ring parts is specifically as follows:
[0032] The first step is to obtain the elastic deformation compensation benchmark data, and the sub-steps are:
[0033] (1) In the CATIA software, assign cast iron material properties to the three-dimensional entity of the binder ring; transfer to the Generative Structural Analysis module of CATIA, and perform finite element mesh division on the three-dimensional entity of the binder ring. model...
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The invention relates to a compensation method for elastic deformation of a pressing ring component of a drawing mold. The method comprises the following steps that a material attribute is given to athree-dimensional entity of a pressing ring, then static finite element analysis is carried out on the pressing ring, and the displacement vector field of the elastic deformation of the pressing ringis calculated; displacement vector field data of a txt file are guided out to serve as compensation benchmark data; and reverse deformation compensation is carried out on an initial pressing face according to the compensation benchmark data, and pressing face hook face data are obtained. According to the compensation method, a compensation benchmark face does not need to be constructed, and the compensation dosage value and the elastic deformation amount value are basically consistent; and the profile bedding-in workload of a bench worker is reduced, the tinctorial yield of a management face area of the pressing ring is increased, and the mold debugging period is shortened.
Description
technical field [0001] The invention belongs to the technical field of automobile sheet metal mold manufacturing, and in particular relates to a compensation method for elastic deformation of a pressing ring part of a drawing mold. Background technique [0002] During the stamping and forming process of automobile body sheet metal parts, it is necessary to ensure that the stamping parts produce sufficient plastic deformation, and at the same time avoid forming defects such as wrinkling and cracking of the stamping parts. In order to achieve the above goals, the flow of sheet metal is mainly controlled by setting reasonable drawbead resistance and pressing force in production. Such as figure 1 As shown, by adjusting the drawbead parameters (such as bead width B, bead height H, concave bead fillet R1, convex bead fillet R2, etc.), pressing force F, etc., a reasonable inflow of sheet metal can be obtained. In the stamping die design stage, the existing technical means can onl...
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IPC IPC(8): B21D24/04G06F30/23G06F30/17G06F30/15
CPCB21D24/04
Inventor 王刚张健闫巍李悦
Owner CHINA FIRST AUTOMOBILE