我厂700旅回破碎机生辅因疲劳和尖峰负荷造成的强烈冲击及润滑油中混入杂质等综合原因，造成其预部螺纹牙局部损坏（螺纹牙折断）达6圈以上，每圈的损坏量为1／3以上（靠近退刀槽处为损坏起点，如图1），造成整根主轴报废。对此，我厂采取了一种补救修复方法，使整根主拍得以修 Our factory 700 Brigade back to the crusher Health and auxiliary due to fatigue and peak load caused by the strong impact and impurities mixed in the lubricating oil and other reasons, resulting in its partial pre-thread damage (thread teeth broken) up to 6 laps, each lap damage The amount of 1/3 or more (near the retreat slot for damage starting point, shown in Figure 1), resulting in the entire root spindle scrapped. In this regard, I plant a remedial approach to repair, so that the whole root can be repaired