手弧焊时,焊把是否轻巧灵便且在连续焊接时不发热,对减轻焊工疲劳,提高效率有密切的关系。目前普通使用的焊把由于把线较粗(35～40毫米~2),把线与焊把连接处的接触电阻较大,连续焊接一段时间后就烫手,尤其在夏季,往往焊接30～40分钟焊把热的无法进行焊接。为了解决这些问题,曾加大把线的载面积,将把线与焊把的连接改为锡焊,但收效不大,而焊 Hand arc welding, the welding rod is lightweight and flexible in the continuous welding without heat, to reduce fatigue welders, improve efficiency are closely related. At present, the commonly used welding rod due to the thicker wire (35 ~ 40 mm ~ 2), the contact resistance of the wire and the welding rod connection at a large, continuous welding after a period of time on the hot, especially in the summer, often welding 30 ~ 40 Minute welding torch heat can not be welded. In order to solve these problems, the area of ​​the wire has been increased, and the connection between the wire and the soldering tip is changed to soldering, but the effect is not great, and the soldering