牵引电动机升高片采用纯锡焊接带来的弊病,很多资料都作了介绍。为了挽救纯锡焊接存在的加热时间长,热影响区大,线圈线脚处绝缘烧焦,换向器工作表面硬度降低,焊接质量难以稳定等缺点,我厂曾对开焊的电枢试验过沿升高片嵌线槽一侧铣槽的方法来加强焊接后的机械强度;对新嵌线的电枢,为了避免线 Traction motor lift film using pure tin welding defects, a lot of information has been introduced. In order to save the existence of pure tin soldering heating a long time, the heat-affected zone, coiled insulation at the coil foot, the commutator to reduce the hardness of the work surface, difficult to stabilize the quality of welding and other shortcomings, The method of raising the slotted groove on the side of the insert groove to strengthen the mechanical strength after welding; For the new embedded armature, in order to avoid the line