0.引言用手电弧焊,焊接质量直接受焊工技能、环境条件、焊工身体等诸多因素的影响,因而制约了焊接质量及焊接效率的提高。另外,由于焊接经常在高温、高劳动强度下作业,对视力和身体健康都有很大的影 0. INTRODUCTION With flashlight arc welding, the quality of welding is directly affected by welder’s skill, environmental conditions, welder’s body and many other factors, thus restricting the improvement of welding quality and welding efficiency. In addition, the welding often work under high temperature and high labor intensity, have a great impact on eyesight and physical health