Numerical Simulation of Punching Forming Process and Computer Simulation Principle and Steps
Abstract
Punching forming process is a general metal forming process. In recent years, cold stamping technology has also been more and more applied in manufacturing and engineering fields.cold stamping is usually manufactured using small parts of rectangle apertures,and numerical simulation based on finite element method was used to analyze how tge small parts response to the pressure applied on them.In this paper,the principle and steps of numerical simulation of punching forming process and computer simulation based on the finite element method will be discussed in detail.
摘要
冲压成型工艺是一种常见的金属成形工艺。近年来，冷冲压技术也越来越多地应用于制造和工程领域。冷冲压通常是使用矩形孔小零件制造的，应用有限元法进行数值模拟来分析小零件如何应用于施加的压力。本文将详细讨论冲压成形过程的数值模拟原理和步骤以及基于有限元法的计算机模拟。
1．Introduction
Punching forming process is one of the most popular and widely used process in manufacturing and engineering.It is used to make small parts of rectangle aperture shapes with different sizes,ranging from micro size to macro size. There are many difficulties to accurately calculate the yielding strength of each small part by the theoretical methods.Therefore,numerical simulation based on finite element methods has become a very important tool for analysing and predicting the forming process of punch forming process.
In the numerical simulation of the punching forming process, the finite element analysis (FEA) technology is used to analyze the mechanical behavior and the load carrying capacity of the punched parts by modeling the pressure applied on the small parts.In this paper,the principle and steps of numerical simulation of punching forming process and computer simulation based on the finite element method will be discussed in detail.
1.介绍
冲压成形工艺是制造和工程中最常用的工艺之一。它用于制作不同大小的矩形孔形小件，从微小尺寸到宏大尺寸。准确计算每个小零件的屈服强度的理论方法有很多难点。因此，基于有限元法的数值模拟已经成为分析和预测冲压成形过程的一种重要工具。
在数值模拟冲压成形过程中，应用有限元分析(FEA)技术，通过对施加于小件上的压力进行建模，分析和预测冲压件的机械行为和载荷能力。本文将详细讨论冲压成形过程的数值模拟原理和步骤以及基于有限元法的计算机模拟。
2．Numerical simulation principle of punching forming process
The numerical simulation of stamping process is a kind of finite element analysis (FEA),which is used to obtain the forming limit of sheet by simulating the sheet pressing process and analyzing the sheet’s fracture operation.Numerical simulation of stamping process based on finite elements is a process that uses finite element methods and experimental characteristics as the basis of numerical calculation model,and utilizes the finite element software to establish space grid and material characteristic’s clear data,which is used to realize the geometric simulation and finite element analysis of stamping process.
The finite element simulation of stamping process is based on the mesh model of the stamping part,and the spatial grid of the finite element model is generated by using the preferred software of finite element analysis.On this basis,the boundary condition,material parameters and boundary force data are initialized,and then these data are input into the finite element analysis software for finite element analysis. After the completion of the analysis,the results of forming process can be obtained.
2.冲压成形过程数值模拟原理
冲压工艺的数值模拟是一种有限元分析(FEA)，它通过模拟板材压力过程并分析板材断裂操作来获得成形极限。基于有限元的冲压工艺数值模拟是一个过程，它使用有限元方法和实验特性作为数值计算模型的基础，并利用有限元软件建立空间网格和材料特征的清晰数据，用于实现冲压过程的几何模拟和有限元分析。
冲压工艺的有限元模拟是建立在冲压件的网格模型上的，有限元模型的空间网格是通过使用有限元分析的优选软件生成的。在此基础上，初始化边界条件、材料参数和边界力数据，然后将这些数据输入有限元分析软件进行有限元分析。分析完成后，可以获得成形过程的结果。
3. Computer simulation steps
The computer simulation of the punching forming process based on finite element method consists of several main steps.
(1) To select the finite element analysis software.Select and install the finite element software based on the actual stamping engineering requirements and analysis conditions.
(2) To set up the finite element model.The finite element mesh model of the punched part can be established by using the preferred software of finite element analysis,and set up the boundary conditions,material parameters and boundary force data.
(3) To define boundary conditions and loads.The boundary conditions of the finite element model and the boundary forces data that corresponds to the operation sequence of die and punch are set up.
(4) To update
