【作者】 马国红；

【导师】 邵成吉； 张义顺；

【作者基本信息】 沈阳工业大学 ， 材料加工工程， 2002， 硕士

【摘要】 随着焊接技术和控制技术的发展，等离子弧焊或MIG弧焊在自动控制下在铝及其合金方面工业生产中起着很大的作用；而作为新型的焊接方法等离子MIG焊，在国外有了较大的进步，国内却较少在这方向上进行研究。 本文所进行是利用等离子MIG焊这种新的方法，结合PLC进行自动焊接铝及其合金。在设计中，控制系统的核心单元采用S7—300型CPU以及对应I／O、AI／AO产品；焊接电源分别选用了TPS5000型MIG电焊机和ARGP300型TIG电焊机，对两台电焊机本身的控制进行的新改造，由PLC的控制信号来进行协调控制；焊胎、送丝系统、冷却水循环系统、三维步进电机行走支架等设备均由PLC进行控制；液晶触显示触摸屏提供了友好的人机界面。同时，控制软件利用STEP7的模块化设计方法，设计了共计12套程序，10套为带有固定参数的分别适用于不同厚度的管及板的不同工件，另2套为不带参数的程序，以用作用户的二次开发。 结果表明，本系统可以完成不同的型材不同厚度产品的焊接，在焊接中，焊枪准确到位，焊缝成形好，焊缝过渡平滑，焊接质量高；焊接速度快，生产效率高，对于8mm厚的型材，一次焊透，焊速达0.5m／min。 本文研制的控制系统，解决了从国外进口类似设备价格高的问题，在焊接质量相同的条件下，成本降低1／3以上；同时可以指导应用和研究参考。更多还原

【Abstract】 With the development of technology of welding, single plasma arc welding or MIG arc welding plays more and more role in automatic welding aluminum and its alloy. A new way-plasma-MIG welding?has been adopted in abroad quickly, but it has few use in our country.The research in this paper is a new system controlled by PLC which had been designed to weld AL and alloy of AL with plasma-MIG. The core of the system adopts one type of PLC of Simens, which is a sort of S7-300, and its additional devices, including DI,DO,AI.AO modules. Welding powers are different, one is TPS5000, the other is ARGP300. The two powers are manipulated harmoniously by single of PLC system. Varying mechanic, machine of supplying line, cooling system of cycling water, and mechanic of three version moved bystepping motors are all controlled by the PLC. And touching panel of LCD gives more friendly HMI. At the same time, the design ofsoftware adopts the way of modules. There are twelve sorts of programs with fixed parameters to weld different workpieces in pipes and plates of AL and its alloy. Another two sorts of those without parameters are given to the user to input right parameters to weld the special workpieces of pipes and plates eachly.The result of system indicates that it can weld different forms of workpieces with different thick. A welding torch can move precisely when welding products. The face of weld is smooth, and the quantity is good. The velocity of this system is quick, and the efficient is high. When welding plate of 8mm, the velocity can reach 0. 5m/min.The controlling system of the design deals with the problem costing much money to buy the similar device so as to save 1/3 or more, the other role helps some application and some references ofresearch and it will throw a light on the new area of welding in Plasma-MIG welding.更多还原