Optimization Design and Damping Performance Analysis of BMC Lathe Bed

The vibration during machining of the machine tool is the main reason that influence machining precision of machine tools. To improve the machining precision of the machine tool, a basalt mineral composite material (BMC) with short curing period and high damping, high specific stiffness and high specific strength was developed. The group distribution ratio and manufacturing process of the concrete diagram were introduced. The compressive strength and damping ratio of BMC were studied by experiments. According to the structure of ordinary lathe, a kind of BMC lathe bed is designed and its structural parameters are optimized. The modal characteristics and damping characteristics of the BMC lathe bed were studied by means of FEM simulation and experimental detection. The results show that the BMC lathe bed has a higher damping ratio (4.14–7.10%) in a wider range of frequencies, which is conspicuously higher than the damping ratio of the cast iron lathe bed (0.3–0.8%). It proves that the BMC lathe plays a significant role in vibration reduction and can improve the machining precision of the machine tool.