电弧增材制造数控机床电气控制与策略

The Electrical Control and Strategy of Numerical Control Machine Tool of Wire and Arc Additive Manufacturing

在老旧数控铣床改造为电弧增材制造机床过程中,系统研究了基于PMAC Clipper卡、S7-200 Smart PLC、交换机、计算机的电气控制与策略,分析了采用RS485通讯和模拟量实现焊机控制的优缺点,并分别通过两种模式制备了低碳钢零件和铝镁合金零件。设计了基于HCNR201线性光耦的双通道电压采集模块,实现了堆积过程中焊接电流与电压的精准同步采集,所设计的电弧增材制造机床成形金属零件效果良好,采集的电流电压波形精准清晰,达到了设计目的。

During the process of refitting the old CNC milling machine into wire and arc additive manufacturing(WAAM) machine tool,the paper systematically studied the electrical control and strategy based on PMAC clipper card,S7-200 smart PLC,network switch and computer. The advantages and disadvantages of RS485 communication and analog control applied for controlling the power supply were analyzed,and low-carbon steel parts and Al-Mg alloy parts were prepared through two modes,respectively. Tthe accurate and synchronous acquisition of welding current and voltage in the deposition process was realized by designing a dual channel voltage acquisition module based on HCNR201 linearity analog optocoupler. The designed WAAM machine tool has good effect on the forming of metal parts,and the collected current and voltage waveforms are accurate and clear,which basically achieve the purpose of the design.