金属结构熔焊快速成形系统设计与实验研究

Design and Experimental Study of Welding Rapid Prototyping of Metal Structures

设计了基于钨极气体保护焊的金属结构熔焊成形系统.该系统由硬件系统和软件控制系统组成,采用高速数控铣床改装的硬件系统以实现熔焊成形的基本操作,软件系统采用多线程方式,实现了计算机与数控系统的通信,在VC++6.0开发环境下,通过对数模转换卡和采集卡的操作,实现了焊接工艺参数的设定与在线修改,以及实时采集熔焊成形过程中的焊接电流和焊接电压等信号.通过典型金属结构成形实验,完成了金属结构的成形,所得金属结构尺寸与设计性能指标基本相符,从而验证了该系统对金属结构的熔焊快速成形工艺设定的可行性.

A welding prototyping system of metal structure based on tungsten arc welding(GTAW) was designed,which consisted of a hardware system and a control software system.The hardware system reequipped by high speed computer numerical control(CNC) milling machine can achieve the basic operation of welding prototyping.Using multithread technology,the software system can achieve the communication between a computer and the CNC system.In VC++6.0 development environment,by operating digital-analog conversion card and acquisition card,online setting and changing of welding parameters can be realized and signals of real-time welding current and welding voltage of the welding process can be collected.After typical metal structure experiment,the complete metal structure was obtained,the size of which is consistent with basic design performance,thereby verifying the feasibility of this system on technology settings of metal structure welding rapid prototyping.