Machining Property of Hard Brittle Materials under High Hydrostatic Pressure

本文研究了静水压对硬脆材料切削性能的影响。本研究的实验使用了专门设计的加工装置，并进行了表面车削试验，并测量了（4）硬脆材料（即，硅、钠玻璃、石英玻璃和石英）在400 MPa和0 MPa的压力下。用显微镜检查这些试样上的加工痕迹，以评估静水压力对加工缺陷的影响。实验结果表明，静液压能有效地减少加工缺陷，并使加工力增大。还在钠玻璃上测量了切割力。结果表明，在高静压下，切削力和摩擦角增大。

This paper reports effects of external hydrostatic pressure on machining properties of hard-brittle materials. Experiments for this study utilized a specially designed machining device, and surface turning tests were conducted and machining force were measured with for (4) hard-brittle materials (i.e., silicon, soda glass, quartz glass and quartz) under pressure of 400 MPa and zero MPa. Traces of machining on these specimens were examined with microscopes to evaluate the effects of hydrostatic pressure on machining defects. The results of the experiments show that hydrostatic pressure is efficient to minimize machining defects and it causes increase of machining force. Cutting force was also measured on soda glass. Results indicated increase of cutting force and friction angle under high hydrostatic pressure.