在毛主席革命路线指引下,我国水电事业有了迅速的发展。为解决水电机组大型铸锻件供应困难的突出矛盾,我厂推广采用以小拼大的铸焊结构,取得了很大的技术经济效果。但因水轮机转轮的刚度与焊接量很大,在用手工焊接时,为避免产生焊接裂纹,需进行上百度的预热,焊工劳动条件极差,经常发生烧防,昏厥现象。为了扭转焊接转轮的落后面貌,实现技术革 Under the guidance of Chairman Mao’s revolutionary line, there has been rapid development of hydropower in our country. In order to solve the outstanding contradiction of the supply difficulties of large castings and forgings of hydropower units, our factory popularized the cast welding structure with small spell, and achieved great technical and economical results. However, due to the rigidity and the amount of welding of the runner of the water turbine, during manual welding, in order to avoid the occurrence of welding cracks, the preheating of Baidu is carried out, and the working conditions of the welder are extremely poor and the phenomenon of burning and fainting often occurs. In order to reverse the backwardness of welding runner, to achieve technological leather