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前言汽轮机冷凝器管板是汽轮机的辅机主要部件之一,每块管板上都有数千个孔需要加工,管板一般都选用低碳钢材料(20~*或A3),低碳钢是一种硬度(强度)低而粘性又较大的材料。因此其切削性能较差。为了使被加工孔在精加工后达到▽_5(6.3)的光洁度,目前国内工厂一般都采用高速钢刀具,并选用低速切削,用钻、扩、铰三道工序来完成孔的精加工,这样的工艺虽然能满足精度和光洁度的要求,但生产效率低,刀具寿命短的问题较为突出,特别为提高切削
Introduction Turbine condenser tube plate is one of the main components of the turbine auxiliary machine, each tube plate has thousands of holes need to be processed, the tube plate are generally made of low carbon steel (20 ~ * or A3), low carbon steel Is a low hardness (strength) and sticky and larger materials. So its cutting performance is poor. In order to make the machined hole finish ▽ _5 (6.3) finish, the domestic factories generally use high-speed steel cutting tools, and the choice of low-speed cutting, drilling, expansion, hinge three procedures to complete the hole finishing, so Although the process can meet the requirements of accuracy and finish, but the production efficiency is low, the problem of short tool life is more prominent, especially for improving the cutting