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为保证头盔的定位精度,非对称、高精度薄片成像物镜的加工是关键。成像物镜存在三个玻璃隔圈,与相邻透镜之间粘结面积小,用传统方法加工,容易造成零件断裂,且散粒磨料从隔圈间隙进入物镜,破坏透镜的光洁度.介绍了如何利用先进的光加数控机床棱镜铣磨机,通过设计合理的工装夹具,采用可靠的测试方法,保证成像物镜的加工精度。棱镜铣磨机采用金刚石磨轮,避免了散粒磨料从间隙进入物镜破坏透镜光洁度;控制进给量的大小保证切削力合适均匀,避免了传统加工方法用力不均造成的零件断裂。加工结果表明用此方法加工的物镜各项指标均达到要求,所加工的物镜已成功装配上百台套产品。
In order to ensure the positioning accuracy of the helmet, asymmetric, high-precision sheet imaging lens processing is the key. There are three glass spacers in the imaging objective lens, and the bonding area with the adjacent lens is small, and the parts are easily broken by the conventional method, and the granular abrasive enters the objective lens from the space of the spacer ring to destroy the lens finish. Advanced light CNC machine tool prism milling machine, through the design of a reasonable fixture, the use of reliable testing methods to ensure that the imaging objective lens processing accuracy. Prism milling machine with diamond grinding wheel, to avoid the abrasive particles from the gap into the objective damage to the lens finish; control the amount of feed size to ensure proper and uniform cutting force, to avoid the traditional processing methods caused by uneven force fracture. The processing results show that all the indexes of the objective lens processed by this method meet the requirements, and the processed objective lens has been successfully assembled on hundreds of sets of products.