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货车拱架柱螺栓及轴箱螺栓由于丝扣损坏或需改公制螺纹,其丝扣部分往往要进行焊修.过去我厂采用的焊修方法是:先将旧丝扣旋削除去,以手工电弧焊堆焊来加大直径,然后重新加工出丝扣.用这种方法焊修螺栓时,成本高,质量差,生产率低,不能适应螺纹公制化后大量生产的要求.因此我厂通过试验研究,改用闪光接触焊接方法切换螺栓的丝扣部分,取得显著的效果,并已成功的应用于生产中. 我厂使用的焊机是LM-150型接触对焊机(图1).
Because of damaged or need to change the metric thread, the threaded part of the truck frame column bolt and axle box bolt often need to be repaired. In the past, the method of welding repaired by our factory is as follows: Welding to increase the diameter of the welding, and then re-processed out of the screw.This method of welding bolts, the high cost, poor quality, low productivity, can not meet the requirements of mass production of the screw after the metric system.Therefore, I plant through the experimental study , Using flash contact welding method to switch the threaded part of the bolt, and achieved remarkable results, and has been successfully used in the production. I use the factory welding machine LM-150 contact butt welder (Figure 1).