Research On Digital Design Of Stamping Die For Special Strip Based On Finite Element Analysis

At present,the economy and technology of China are developing rapidly and the energy consumption is increasing.As a clean energy source,nuclear power will change China’s current energy structure.Special strip is an important part of nuclear fuel assemblies.The design and development process of stamping dies is very critical.Mastering the stamping characteristics of special strip alloys and realizing the complete autonomous production of positioning grids have become a further development of China’s nuclear power technology.The technology must be mastered.With the development of the industrial level,more and more products have been stamped using multi-position progressive stamping production lines.However,most companies are still designing and developing progressive molds based on experience and experience has become an important factor that restricts the development of the company.This article relies on a subproject in a national major science and technology major project,takes the special strip stamping die digital design as the research object,studies the special strip stamping process,determines the special strip stamping process plan,and based on the finite element analysis technology.The process scheme is simulated and optimized.Finally,the structural design of the mold is based on the results of finite element analysis.This article mainly carries out the following research work:(1)Test the punching performance of special strip alloy sheets,and then analyze the punching process characteristics of the special strips;According to the shape and structural characteristics of the special strips,consider the layout design principles at the same time,and finally determine the stamping scheme of the strips.(2)According to the specifications of the strip and the basic parameters of the mechanical properties of the special alloy material,a high-precision finite element model for continuous stamping is established.The multi-step progressive stamping numerical simulation analysis is performed on the strip to verify the rationality of the strip stamping scheme.Then the finite element simulation of the strip forming feature is performed,and the optimization of the forming process is completed according to the simulation results.(3)According to the finite element analysis results of the strip stampingprocess plan and the optimized progressive stamping layout scheme,the digital design and development of the strip progressive stamping die is completed,and the subsequent debugging of the die and the punching of the special strip are completed.According to the punching results of the strips,the accuracy and feasibility of the digital design and development process of the molds based on the finite element theory are verified.In this paper,the multi-position progressive die designed with the digital development scheme can meet the requirements for punching of special ribbons.At the same time,through research on this subject,we find that: based on the finite element analysis of the special strip stamping die digital design process with high accuracy and feasibility,so the above design process of multi-position progressive die The development plan has certain guiding significance for the design and manufacture of special strip stamping dies.