钎焊砂轮精密磨削K9玻璃的实验研究

K9玻璃广泛应用于高端光学元件,但K9玻璃是具有难加工性质的脆性材料。为了提高磨削效率,尽量减少磨削损伤以及减轻后加工工序的难度,降低加工成本,许多研究者都在开展K9玻璃的加工技术研究。钎焊砂轮具有磨粒出露高度大、磨粒易排序等特点,采用钎焊金刚石砂轮对K9玻璃进行精密磨削,研究砂轮在修整过程中的变化,并观察K9磨削表面质量随磨削工艺参数的变化。实验结果表明:砂轮修整时磨粒会出现平台磨损、棱边钝化等形态变化,磨削K9玻璃表面会出现有磨痕纹理的光泽区域和剥落破碎的坑点。

Experiment Research on Precision Grinding of K9 Optical Glass with Brazed Grinding Wheel

K9 glass is extensively used as high end optical element material.However,K9 glass is a difficult-to-cut and hard material.In order to achieve high grinding efficiency,reduce subsurface damage and difficulty of postproduction as well as procedure cost,many researchers research K9 machining technology.Brazed grinding wheel has the advantages of high grit protrusion and easily orderly setting of gits.Consequently,brazed diamond grinding wheel was used to precisely grind K9 glass.The change of grinding wheel during dressing was studied and the ground surface changes of K9 glass as process parameter variation were observed.The experimental results indicate that flat wear and edge passivation and some other grit forms occur.Ground K9 glass surface is made up of grinding mark glazing area and some spalled pits.