我们曾有一台进口推土机,功率为102kW,牵引力为110～140kN。由于使用中盆角齿轮损坏而引起盆角齿箱部位的机座侧板和底板开裂,曾多次进行焊修终因方法不对而失败。后来我们组织科协小组活动,对机体材质进行了化验,又根据焊接性能要求制定了可行的修复工艺方案,经施焊而成功。此法对整体性较强的机件开裂修复可以借鉴,现介绍以抛砖引玉。 We once had an imported bulldozer with a power of 102kW and a traction of 110-140kN. Due to the damage of the middle-tank angle gear, the side plate and the bottom plate of the base of the box corner gear box were cracked, and the welding method was repeatedly failed due to the wrong method. Later, we organized a group association activity to conduct tests on the body materials. We also formulated a feasible repair process plan according to the welding performance requirements. We succeeded in welding. This method can be used as a reference for cracking and repairing of mechanical parts with a strong integrity.