大功率高频接触焊双焊脚结构的改进与应用

为了解决大壁厚、中大直径HFW钢管在生产过程中焊脚电极搭接处出现的"打火"及电极烧损现象,分析了传统接触焊焊脚结构存在的问题以及影响,发现材料选择不当、尺寸过小、安装不当、冷却不良、异常刮擦和自然磨损等是降低电极使用寿命的重要因素。通过对主要原因进行分析,介绍了一种双焊脚的设计方案,并对其原理、使用方法进行了论述。通过在实际生产中进行应用,发现该双焊脚设计能够有效解决此类问题。

Improvement and Application of High-power High-frequency Contact Welding Double Leg Structure

In order to solve the problems occurred in welding leg overlap joint during manufacture procedure of thick-wall and large diameter HFW pipe, such as strike a light and electrode burning loss, it analyzed the existing problems and influence of traditional contact welding leg structure, and found the important factors reducing electrode service life, including improper material selection, undersize, poor cooling, abnormal scratch, natural wear and so on. Through analysis on main reasons, it introduced a kind of double welding leg design scheme, and expounded its working theory and using method. Through practical application, it found this double welding leg design can effectively solve such problems.