中阶梯光栅刻划刀具抗磨损设计

Wear resistant design of grating ruling tool for echelle

采用DEFORM有限元分析软件模拟中阶梯光栅刻划刀具在光栅刻划过程中的应力分布,并结合金刚石晶体解理特征设计了抗磨损刀具刃口取向。当光栅刻划刀具刃尖点受最大摩擦力方向平行于金刚石晶体周期键连(PBC)方向,且刀具Z向载荷垂直于(111)晶面时,定向面与(111)晶面夹角为27°,非定向面与(111)晶面夹角为63°;光栅刻划刀具在72 g负载条件下,刻程超过17 km时,刀具刃口无崩口等缺陷。采用该方法设计的光栅刻划刀具使用寿命大大超出了传统刀具的使用寿命(刻程约0.8 km),证明了中阶梯光栅刻划刀具抗磨损设计方法的合理性和有效性。

The stress distribution on gating ruling tool edge is analyzed by finite element analysis software DE- FORM. Combined with the diamond crystal cleavage theory, the wear resistant edge orientation of tool is de- signed. As the max friction direction on tool tip is parallel with periodic bond chain of diamond crystal and the load in Z direction is vertical to （ 111 ） crystal plane, the angle between the blaze plane of tool and （ 111 ） crystal plane is 27 ° and the angle between non-blaze plane of tool and （ 111 ） crystal plane is 63 °. The ruling distance is more than 17 km under the tool load of 72 g, and no defects occur on tool edge such as collapse, etc. The life of grating ruling tool designed by this method far exceeds that of traditional ruling tool（ ruling dis- tance is about 0. 8 km）, which illustrates that the wear resistant design method of grating ruling tool for echelle is feasible and effective.