摘要
以嵌入式PC和德国倍福E-bus模块组成硬件平台,构建了一套基于现场总线的变极性等离子弧自动化焊接控制系统。利用EtherCAT协议构建系统的运动控制平台,建立空间笛卡儿三维坐标系,采用G代码命令编程,实现对于焊接空间轨迹的示教功能,同时利用DeviceNet协议构建系统的焊接工艺控制平台,建立变极性等离子焊接电源、等离子气流量控制器、脉冲送丝机、焊矩高度控制器之间的现成总线通信网络。基于TwinCAT软件平台,设计出焊接过程控制人机交互界面,对焊接速度、焊接电流、离子气流量、送丝速度等焊接参数进行实时控制与监测,并且控制五个运动轴的同时联动形成空间曲线焊缝的焊接轨迹并监测五个运动轴的运行状态,完成等离子穿孔焊接的起弧穿孔、稳定焊接和熄弧填孔的焊接过程。
A control system of the variable polarity plasma arc welding（VPPAW） based on fieldbus is established,which is consisted with embedded PC and several EtherCAT bus（E-bus） modules.ErtheICAT protocol is made use of in the motion control subsystem,which upbuilds Descartes coordinate space and teaching programs using the G-code command for three-dimensional flexural track.DeviceNet protocol is made use of in the welding process control subsystem,which constitutes communication network, containing the variable polarity plasma are welding power, the plasma gas flow controller,the pulse wire feeder and the torch-height controller ere.The human-machine interface bases on TwinCAT software package for setting and monitoring welding parameters,such as welding speed,welding current,plasma gas flow,filler wire speed,ete.Three-dimensional flexural weld path is formed with the five axis cooperation movement whose operational status can be monitored.Initially forming,steadily moving and finally filling keyhole of VPPAW is reliably demonstrated in the control system.
出处
《电焊机》
北大核心
2011年第10期15-20,共6页
Electric Welding Machine
基金
国家重大科技专项资助项目(2011ZX04016-061)
北京市教委科技发展重点资助项目(KZ200910005003)
