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Optimized design method for determining geometric parameters of intermediate construction for forming panel veneer in multiple steps

A technology of geometric parameters and optimal design, applied in the fields of calculation, electrical digital data processing, special data processing applications, etc., can solve the problems of poor accuracy and difficulty in obtaining the optimal values ​​of geometric parameters of intermediate configurations.

Inactive Publication Date: 2012-10-17
HUNAN UNIV
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Problems solved by technology

[0003] The purpose of the present invention is to provide an optimal design method for determining the geometric parameters of the intermediate configuration of the multi-step forming of the sheet metal. The value of the geometric parameters of the intermediate configuration of the multi-step forming can only be determined by the experience of the engineer, and the accuracy is poor and difficult. The Problem of Obtaining the Optimal Value of the Geometric Parameters of the Intermediate Configuration

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  • Optimized design method for determining geometric parameters of intermediate construction for forming panel veneer in multiple steps
  • Optimized design method for determining geometric parameters of intermediate construction for forming panel veneer in multiple steps
  • Optimized design method for determining geometric parameters of intermediate construction for forming panel veneer in multiple steps

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Embodiment 1

[0034] Example 1: figure 1 It is a CAD model of a rectangular local feature part, and the specific outline dimensions are: length 200mm, width 200mm, thickness 0.8mm. The material is SECCN5, the elastic modulus is 210Mpa, the Poisson's ratio is 0.28, the hardening index n=0.1825, and the thickness anisotropy coefficient r=1.662. Since the part is extracted from a back plate part, the blank-holding force of the back plate part cannot be adjusted during the forming process, so the blank-holding force of the rectangular local feature part cannot be adjusted during the forming process. Cracking occurs, and multi-step forming is required to solve the cracking problem.

[0035] figure 2 A flow chart of an optimal design method for determining the geometric parameters of the intermediate configuration of the multi-step forming of the sheet metal is shown in the present invention. The optimal design method of the geometric parameters of the intermediate configuration for determini...

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Abstract

The invention discloses an optimized design method for determining geometric parameters of intermediate construction for forming a panel veneer in multiple steps. The method comprises the steps of establishing a three-dimensional computer aided design (CAD) parametric model of the intermediate construction and final construction for forming the panel veneer in multiple steps; selecting the intermediate construction geometric parameters to be optimized; establishing a one-step method simulation model of the intermediate construction, and carrying out parameterization processing on the finite element mesh of the simulation model according to the selected geometric parameters; determining an optimization target and a constrain condition; selecting an appropriate optimization algorithm, starting the optimization process, and obtaining the optimized intermediate construction geometric parameters; updating the three-dimensional CAD model of the intermediate construction according to the optimized intermediate construction geometric parameter; and establishing an incremental method simulation model of multi-step forming to perform the verification, returning to re-establish a one-step simulation model of the intermediate construction if the incremental-method simulation model cannot meet the requirement, and repeating the optimization process until the satisfaction.

Description

technical field [0001] The invention relates to an optimal design method for determining the geometric parameters of a mold surface in stamping forming of sheet metal, in particular to an optimal design method for determining the geometric parameters of the intermediate configuration of multi-step forming of sheet metal. Background technique [0002] For some stamping parts with a large forming depth or local convex hull forming where the blank holder force cannot be adjusted, it is generally formed in multiple steps to avoid cracking and wrinkling defects. In multi-step forming, the intermediate configuration is generally obtained by modifying several parameters based on the final forming configuration. In the traditional method, the value of the geometric parameters of the intermediate configuration depends on the experience of the engineer, and it needs continuous modification and trial and error to obtain the required intermediate configuration shape, and the development...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 孙光永李光耀毛丽臣郭瑞泉
Owner HUNAN UNIV
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