机床滑动导軌上的移动稳定性是十分重要的,它在很大程度上决定了机床的加工精度和表面光洁度。工作台的爬行常常在重型机床的小进給速度时暴露出来,譬如重型銑床、臥式鏜床、重型磨床、坐标鏜床等,在精密加工时往往由于爬行而使工件精度和光洁度变坏;对于重型刨床則一般要求就不是很高,但如对箱体类零件作精刨代刮时,也需要注意爬行問題。某重型机床厂就規定有一台专門的龙門刨床来精刨床身导軌,而在其他重型刨床上粗加工床身导軌。正因为爬行是在低速时出現,所以国外有人对极 The stability of the movement on the sliding guide of the machine is very important and largely determines the machining accuracy and surface finish of the machine. Workbench crawling is often exposed at a small feed rate of heavy machine tools, such as heavy-duty milling machines, horizontal boring machines, heavy-duty grinding machines, coordinate boring machines, etc., which often deteriorate the accuracy and finish of workpieces in precision machining. Planing machine is generally not required to be very high, but if the box parts for fine planing scraper, also need to pay attention to crawling problems. A heavy machine tool factory on the provisions of a special gantry planer to planer bed rails, and other heavy planer roughing bed rails. It is precisely because the crawling occurs at low speed, so some people abroad right