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3172型外圆磨床是苏联莫洛托夫重型机床厂一九五一年出厂的产品。我厂于一九五八年初安装并投产。该机床由于设计结构不佳、床身导轨材料低劣等原因,早于六十年代中期已经丧失了原精度和性能;主要是床身导轨件严重磨损,磨削精度和光洁度迅速下降。廿余年来又经过三次大修,每次都精刨磨损的导轨表面,已致铸件壁厚减少,刚性大受影响。实测工作台导轨最薄处的铸件壁厚仅为11mm,所以变形严重。为了满足产品——落地搪床主轴的工艺要求,于一九七九年精化改造该机床。
3172 cylindrical grinding machine is Molotov Soviet heavy machine tool factory in 1951 manufactured products. Our factory was installed and put into production in early 1958. The machine tool has lost its original accuracy and performance as early as the mid-1960s due to poor design structure and poor material of the guide rails of the bed. The main parts of the guide rail are serious wear and tear, and the precision and smoothness of grinding are rapidly decreased. Over the past 20 years and after three major repairs, each fine planing rail surface wear, castings have been reduced wall thickness, rigidity greatly affected. The measured thickness of the guide rail at the thinnest wall thickness is only 11mm, so the deformation is serious. In order to meet the product - floor boring machine spindle technology requirements, in 1979 refinement of the machine.