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床身是机床的基础,是机床的关键零件之一,而床身导轨的精度又是保证加工工件精度的重要因素。为使导轨精度保持长久,使用中磨损少,目前车床床身选用的材质为HT250和HT300,有的还采用密烘铸铁。导轨的表面经感应淬火硬度为HRC48～50,深度为2～3mm,要求磨削后粗糙度为R_(?)0。8μm,对宽度小于400mm的导轨在任意250mm长度上纵向导轨垂直平面内的几何精度对普通级机床要求小于0.0075mm对精密级机床要求小于0.005mm,且只允许中凸。 H155车床床身导轨磨床为满足导轨加工要求提供了可靠设备,它采用多片砂轮成形周边磨削,也可用单片砂轮分步磨削。其特点是效率高,精度高,特别是磨削淬硬导轨时比端面
The bed is the basis of the machine tool, which is one of the key parts of the machine tool. The precision of the bed guide rail is also an important factor to ensure the accuracy of the workpiece. In order to maintain long-term rail accuracy, less wear and tear, the current choice of lathe bed material for the HT250 and HT300, and some also use the bake cast iron. The surface of the guide rail is induction hardened HRC48 ~ 50, the depth of 2 ~ 3mm, the required roughness after grinding R _ (?) 0.8μm, the width of less than 400mm rails in any vertical length 250mm longitudinal guide rail in the vertical plane Geometrical precision requirements of ordinary machine tools less than 0.0075mm Precision machine tools less than 0.005mm, and only allows the convex. H155 lathe bed rail grinder to meet the rail processing requirements provide a reliable equipment, which uses multiple grinding wheel forming around the grinding, grinding can also be used single-step grinding wheel step. It is characterized by high efficiency, high precision, especially when grinding hardened rails than the end face