Three-dimensional finite element simulation method of metal cutting process based on multi-step

Abstract

A three-dimensional finite element simulation method based on a multi-step metal cutting process, comprising the following steps: (1) establishing a three-dimensional model of a workpiece and a tool and assembling it; (2) setting dynamic thermal-mechanical coupling analysis steps and restart parameters; (3) Mesh the model; (4) Set the contact properties and boundary conditions of the cutting in the first step; (5) Submit the model for the first calculation to extract the cutting force and cutting temperature; (6) Set the first The results of this operation are imported into the model as the initial conditions of the unloading process in the first step; (7) Set the analysis step, restart parameters, contact properties and boundary conditions when the tool and workpiece are unloaded, and perform restart calculations; (8) Extract the residual stress of the first working step; (9) Import the calculation results of the previous step into the model as the initial conditions of the second working step; (10) Extract the cutting force, cutting temperature and residual stress of the second working step. This method has high simulation accuracy, fast calculation speed, and greatly reduces the cost of cutting experiments.

Description

technical field [0001] The invention relates to a simulation analysis method of a metal cutting process, belonging to the technical field of mechanical processing. Background technique [0002] Metal cutting is a crucial process in the field of machining, and the quality of cutting processes determines the performance of parts to a large extent. Before processing, it is necessary to determine reasonable processing parameters, improve the cutting force, cutting temperature and residual stress after cutting and other indicators during cutting, so as to obtain better processing quality. [0003] The traditional method of determining processing parameters is the trial cutting method. This method requires a large number of cutting experiments. The cycle is long, the efficiency is slow, and it will cause waste of resources. The method of finite element simulation can solve these problems well. [0004] Most of the current cutting simulations simplify the cutting process to a two-...

AI Technical Summary

Problems solved by technology

Therefore, the 2D simulation of a single working step cannot well reflect the complex changes of various parameters in the metal cutting process

[0005] Since the ABAQUS software is simulating 3D cutting, it is prone to calculation non-convergence problems for models with multiple analysis steps, and the software will not give a prompt message for calculation errors, so it is very troublesome to find

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