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看了《农业机械》1978年第一期上孙忠革同志写的《电焊提取断螺栓》一文,在操作上补充一些做法,提出来和同志们商榷。在机器装配和维修中,最易折断的是一些 M6～M12的螺栓和丝锥,或(?)2～(?)12的钻头,用焊条在这样小的螺孔中堆焊时,熔渣很易流到螺纹中去,由于熔渣的阻碍,使断螺栓和丝锥不易取出。我们的做法是用厚0.5～1.2毫米的铁皮制作一个比孔深略长3～5
Read the “Agricultural Machinery” in 1978, the first issue of Comrade Sun Zhongge wrote “welding extraction of broken bolts,” a text in the operation to add some practices, put forward to discuss with the comrades. In the machine assembly and repair, the most easy to break is the number of M6 ~ M12 bolts and tap, or (?) 2 ~ (?) 12 drill, welding rod in such a small hole in the welding, the slag is Easy to flow into the thread, due to the clogging of slag, so that broken bolts and taps is not easy to remove. Our approach is to use a 0.5 ~ 1.2 mm thick iron to make a slightly longer than the hole 3 to 5