大型轧钢机一般都设计了装压下螺母的压下孔,巨大的轧制力(约为67000kN)通过压下装置及压下孔传递给机架。在压下孔的根部有一个十分特殊的过度段根部,非常难以加工。文中分析了压下孔的结构特点、加工工艺、工装和数控加工程序设计,其设计思路有许多独特之处。 Large-scale rolling mills are generally designed to press the nut pressed into the hole, a huge rolling force (about 67000kN) through the pressure device and pressed down to pass to the rack. There is a very special over-root section at the root of the pressed hole, which is very difficult to machine. The paper analyzes the structural characteristics of the hole, processing technology, tooling and CNC machining program design, the design ideas have many unique features.