基于AVR单片机的粗丝气电立焊机弧长控制器研究  

A Study on Arc-length Controller for Gas-electric Vertical Welder with Thick Wire Based on AVR Microcontroller

作　　者：罗云萌[1] 

机构地区：[1]陕西铁路工程职业技术学院,陕西渭南714000

出　　处：《装备机械》2015年第3期42-45,共4页The Magazine on Equipment Machinery

摘　　要：目前气电立焊主要采用1.6 mm以下的细丝焊,应用于40 mm以下的中厚板焊接。在焊接40 mm以上的大厚板时,细丝气电立焊的焊接生产效率还不能满足实际生产的要求。通过对气电立焊焊接电弧弧长稳定性的研究,分析了气电立焊焊接过程,尤其是粗丝气电立焊弧长控制技术及原理,设计了一套以单片机Atmega128为控制核心的,由变速送丝垂降外特性电源焊接系统和变速小车爬行系统组成的组合式弧长控制系统。试验表明,该弧长控制系统抗干扰能力强、响应速度快,能够迅速对外界干扰引起的弧长变化进行精确的补偿控制,并能精确控制焊枪摆动,焊接质量好。Currently gas-electric vertical welder mainly adopts fine wire with a diameter under 1.6 mm for welding of medium plate with a thickness under 40 mm. When welding the plate with a thickness over 40 mm, the welding productivity of gas-electric vertical welder with fine wire can not satisfy real production requirement. Through the examination of arc length stability provided by the gas-electric vertical welder, and the analyses of the welding processes of the gas-electric vertical welder, especially the control technique anti theory of arc length in gas-electric vertical welder using thick wire, we have designed a welding system with additional features of variable wire feedrate ＆ rappelling wire, and an arc length control system with variable speed cart crawling system combined. Both systems are mainly controlled by Atmega128 microcontroller. Tests demonstrate that the arc length control system has strong anti-interference ability and fast response, it can enable accurate compensate control against the changing arc length caused by external interference and provide precise control of the wobble of the welding torch to achieve fine welding quality.

关 键 词：AVR单片机 气电立焊 弧长控制 

分 类 号：TG434.5[金属学及工艺—焊接]