The Design And Key Technology Research Of Argon Arc Welding Additive Manufacturing System

The argon arc welding additive manufacturing technology is a metal part manufacturing method combining a conventional welding method and a rapid forming technique.Compared with traditional manufacturing methods,it has many advantages such as short cycle,high density of molded parts,good controllability and low equipment cost.It is widely used in medical,biological,aerospace and other fields.This paper designs an argon-arc welding additive manufacturing system based on the metal additive manufacturing equipment development project of the Science and Technology Department of Jiangsu Province.The forming method and proposed various structure methods for mechanical properties of parts are studied.Aiming at the problem of low forming precision in the additive manufacturing process,the method of milling and cutting materials is designed to improve the flatness of the contour surface.Firstly,an argon arc welding additive manufacturing system is designed.Including hardware platform structure design and system software development,hardware platform part combined with functional analysis,equipment selection,and develop a corresponding system control program.The software aspect is divided into two parts: the lower machine motion control software completes the control of the on-site forming equipment,and the upper computer monitoring system software is responsible for real-time communication with the motion controller,separating the control from the scene,and ensuring the forming safety.Secondly,the model contour forming method is studied,and two optimization filling structure design methods are proposed for the mechanical performance defects of simple contour parts.The contour data point extraction software based on Cura engine is developed.Two contour forming path planning methods are proposed,which are stacked and spiraled.In addition,parallel scanning and honeycomb hexagonal structure filling methods are designed with contour as the boundary.According to the arc forming characteristics,Study each of the optimal forming paths.Then,for the size error of the additive forming process,a milling and cutting material scheme based on the contoured indentation hierarchical segmentation milling margin method is proposed.The milling scheme is divided into two parts: contour milling and top milling.The layered split milling margin method reduces the milling pressure of each milling cutter,effectively improves the milling precision and prolongs the milling cutter life.Finally,design experiments to verify the correctness and effectiveness of the previous methods.Through the spline experiment,the relationship between forming parameters and forming effect is obtained.The forming experiments of contour parts,filling parts and convex solid parts are carried out respectively.The contour singular point optimization method based on B-spline curve is proposed to effectively improve the complex contour.Forming accuracy.Through mechanical experiments,the effectiveness of the filling structure to improve the mechanical properties of the parts is verified.The milling experiment is carried out and the experimental results are good,indicating that the composite forming process can effectively improve the forming precision of the workpiece.