Multiple-station-progressive mold base-body structure topology optimization method

Abstract

The invention discloses a multiple-station-progressive mold base-body structure topology optimization method. The multiple-station-progressive mold base-body structure topology optimization method includes the steps that 1, an optimization area of a base body is determined according to structural elements of a convex-concave mold outside a mold base body; 2, separation processes are subjected to numerical simulation with the finite element analysis method to obtain stress of a mold in the punching process; 3, the mold base-body structure is subjected to topology optimization based on the variable density method, the mold stress in the step 2 serves as the boundary condition of force to be mapped into a topology-optimization finite element model, finite-element simulation is designed through topology optimization with the fact that the mold structure is allowed to be deformed as the optimization constraint condition, the different cell density values are selected to be compared, and the optimization result is determined according to the maximum optimization benefit index; 4, according to the optimization result, the mold base body is designed, and whether the designed mold meets the deformation constraint condition or not is tested. By means of the multiple-station-progressive mold base-body structure topology optimization method, the structural rigidity of the mold can be effectively improved, the quality of a punching piece is more stable, and meanwhile the lightweight effect of the mold is achieved accordingly.

Description

Technical field [0001] The invention relates to the field of mechanical engineering plastic processing methods and molds, in particular to a method for optimizing the matrix structure of a multi-station progressive die mold. Background technique [0002] The mold matrix refers to the structure other than the working parts (concave and concave mold, blank holder, etc.). The ratio of the mold matrix to the total mass of the mold can reach more than 80%. The traditional mold matrix structure design is mainly based on experience and lacks scientific theoretical guidance. In order to ensure the strength and rigidity of the mold structure, the size of the mold matrix is ​​often too large, and the safety factor is larger, but increasing the volume of the mold structure does not necessarily effectively improve the stability of the stamping quality, and the increase in volume will also increase the production cost. , Increase the energy consumption of the punch press. [0003] Especially ...

AI Technical Summary

Problems solved by technology

In order to ensure the strength and rigidity of the mold structure, the size of the mold matrix structure is often too large, and the safety factor is large, but increasing the volume of the mold structure does not necessarily effectively improve the stability of stamping quality, and the increase in volume will also increase production costs. , increase the energy consumption when the press is working

[0003] Especially for high-precision multi-station progressive dies, the deformation of the die structure during the stamping process will have an important impact on the forming quality of the stamping parts. For the stations with high precision requirements, the traditional die structure cannot guarantee sufficient rigidity

Larger mold structure deformation will cause unstable quality of stamping parts, repeated mold repairs, prolonging the production and manufacturing cycle of molds

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