Accurate deformation control-oriented multilayer and multi-pass welding technology for hollow stabilizer bars of automobiles

Abstract

The invention discloses an accurate deformation control-oriented multilayer and multi-pass welding technology for hollow stabilizer bars of automobiles. The accurate deformation control-oriented multilayer and multi-pass welding technology includes steps of 1), building three-dimensional geometric models matched with the hollow stabilizer bars of the automobiles; 2), carrying out grid division onthe three-dimensional geometric models; 3), building coupling models of temperature fields and stress and strain fields in multilayer and multi-pass welding procedures for the hollow stabilizer bars of the automobiles; 4), setting thermal-mechanical material parameters, multilayer and multi-pass welding heat sources and multilayer and multi-pass welding paths for the hollow stabilizer bars of theautomobiles, loading initial conditions and boundary conditions according to actual welding situations, solving and computing the thermal-mechanical coupling models by the aid of numerical simulationmethods and analyzing and judging obtained results. The accurate deformation control-oriented multilayer and multi-pass welding technology for the hollow stabilizer bars of the automobiles has the advantages that the three-dimensional coupling models are built, welding technologies are optimized by the aid of modeling by finite element methods and emulation research, accordingly, technological exploration workload can be reduced, and the optimal technologies with functions of controlling welding residual stress and welding deformation ca be obtained.

Description

technical field [0001] The invention belongs to the field of welding simulation, and in particular relates to a multi-layer and multi-pass welding process for an automobile hollow stabilizer bar facing precise deformation control. Background technique [0002] With the vigorous development of the global economy and the gradual improvement of people's living standards, automobiles are becoming more and more popular as a typical means of transportation. While the automobile industry is developing rapidly, it is also actively researching the safety and ride comfort of automobiles. The main role of automobile stabilizer bars It can reduce the occurrence of roll when the car is turning. According to the force characteristics of the stabilizer bar in actual work, it can be designed as a hollow stabilizer bar, which can achieve a weight reduction effect of 30% to 45%. Therefore, the hollow stabilizer bar has become a research hotspot in the field of stabilizer bars. [0003] The h...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to aim at the traditional welding deformation prediction method adopted in the welding process of the automobile hollow stabilizer bar described in the background technology, which relies on empirical curves or empirical formulas based on experiments and statistics, resulting in many disturbances in the welding deformation prediction process Factors, repeated process exploration experiments are required, time-consuming, labor-intensive, and costly, and a multi-layer multi-pass welding process for automotive hollow stabilizer bars oriented to precise deformation control is provided.

Images