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近年来机床生产中越来越多地使用磨削导轨的工艺,能否正确地解决热变形问题是保证加工质量的关键,本文通过对外圆磨床床身的分析和现场实验,分三方面讨论了这一问题:(1)直接固定在混凝土地基上的导轨磨床,在地基本身有上下温差存在时,不可避免地将使母导轨产生弯曲,并在加工时复映到工件上,为此,应改善导轨磨床的安装方法,最好能便于定期地调节母导轨的精度;(2)室温变化的影响主要是由于工件各部分的热容量不等,因此,改善精密箱体工件的结构均匀性、避免阳光照射和气流的影响是十分重要的;(3)磨削热使工件局部受热,也会使后者产生热变形,从数值上看不亚于室温变化的影响,也需要采取相应的措施。
In recent years, more and more use of grinding machine tool manufacturing process, whether the correct solution to the problem of thermal deformation is to ensure the quality of the key to this article through the analysis of cylindrical grinding machine bed and field experiments, which are discussed in three aspects A problem: (1) directly fixed on the concrete foundation of the rail grinder, the ground itself there is temperature difference exists, it will inevitably lead to the parent rail bending, and remake to the workpiece during processing, to that end, should be improved (2) The influence of room temperature variation is mainly due to the heat capacity of various parts of the workpiece, therefore, to improve the structural uniformity of precision box workpiece, to avoid the sun Irradiation and air flow is very important; (3) grinding heat to local heating of the workpiece, the latter will also produce thermal deformation, numerically speaking, no less than the impact of room temperature changes, but also need to take appropriate measures.