基于工件弹性变形的薄型非球曲面(玻璃)零件加工方法研究

Application of Elastic Deformation Machining Method to Generate Aspheric Surface Glass

针对传统非球曲面加工技术存在对设备依赖度高及加工效率较低等问题,研究了薄型非球曲面零件的弹性变形加工法,并基于材料弹性变形特性,将非球曲面加工转变为平面加工。通过理论计算及ABAQUS有限元仿真确定了平板玻璃工件在均匀压力及周边简支条件下的弹性变形面型,并对工件进行了弹性变形加工实验;加工面型与理论面型误差的最小均方根、峰谷值分别为1.66μm与2.80μm,验证了使用弹性变形加工方法进行薄型非球曲面零件加工的有效性。

Traditional aspherical surface machining technologies have disadvantages such as high dependency of precision machining equipment and low efficiency in batch production.An elastic deformation machining method for thin aspherical components was studied herein,which can transfer the aspherical machining to planar machining.By theoretical calculation and ABAQUS finite element simulation,the elastical deformation profile of circular glass plate was determined when the plate was simply supported and bearing a uniform pressure,and the experiments were carried out.The RMS（root mean square） value and PV（peak valley） value of the form error between machined surface and target profile is as 1.66μm and 2.8μm respectively,which verify the validation of elastic deformation method for the machining of thin aspherical components.