激光切割石英的切向裂纹研究  

Study on the tangent cracks of quartz with laser beam cutting

作　　者：周岩[1] 刘晓胜[1] 张显奎[1] 杨乐民[1] 

机构地区：[1]哈尔滨工业大学,748信箱哈尔滨150001

出　　处：《激光杂志》2003年第4期73-75,共3页Laser Journal

摘　　要：激光切割熔融石英材料出现裂纹的主要原因是相当大的温度梯度所产生的过大热弹性应力。本文对惯性导航用加速度计的关键部件———石英摆片激光切割过程中的切向裂纹问题进行了定量的研究 ,通过对切向裂纹产生的位置、切口处温度场和应力场的计算分析 ,给出了切向产生裂纹的评价准则 。The great thermal elasticity stress,resulted from the too great temperature gradient of material,is the main cause of bringing many cracks when the laser beam cuts the fused quartz material.The paper quantitatively studies the problem of tangent cracks with laser beam cutting quartz pendulous reed,which is the key component of the accelerometer of an inertial navigator.On the basis of relative calculating,the paper analyzes the position of the tangent cracks and the temperature field and the stress field of cut ,and gives the numerical evaluation rule of presenting the tangent cracks.It is very important to avoid the tangent cracks when laser beam cuts the quartz material.

关 键 词：激光切割 切向裂纹 熔融石英 温度梯度 热弹性应力 

分 类 号：TG665[金属学及工艺—金属切削加工及机床]