汽车起重机:旋转减速器壳和转台底板连接内螺纹孔磨损后的修复

Introduction of Recovery of Abrasion of Rductor-shell and Threaded-hole of Crane-truck

我们单位有几十辆用了20多年的大型汽车起重机。由于使用年头已久，一些起重机的旋转减速器与转台底板连接的内螺纹孔出现不同程度的磨损。磨损后，有3个方案可解决这一问题——换起重机转台总成、更换起重机转台底板和修复螺纹。第1个方案成本太高，第2个方案工艺太复杂，所以，一般情况下我们采取第3个方案——修复内孔螺纹。关于修复内孔螺纹，我们摸索出3种有效的方法，下面予以简单介绍。

For most of crane-truck, it is common thing that the threaded hole connecting to reductor and wheeling-bedplate would be in somewhat abrasion for reasons of long term usages. Generally, there are three solutions to this problem -- changing of the entire wheeling system, changing of the wheeling-bedplate only or recovery of threaded hole. This last one is regarded as most easy and cost-effective measures.