论文部分内容阅读
首先以91μm磨粒杯形铜基金刚石砂轮作为修整器并结合砂轮在线电解修锐技术(ELID,Electrolytic in- process dressing)对151μm磨粒电镀镍基单层金刚石砂轮进行精密高效的修整。在最佳的修整参数下,同时应用测力仪对两个砂轮间磨削力进行监测,并应用共轴光学位移检测系统对砂轮表面状态进行在位监测,151μm砂轮的回转误差被减小至1～2μm范围,同时砂轮上所有金刚石磨粒被修整出平坦表面并拥有恒定的圆周包迹,此时砂轮达到最佳工作状态。然后应用被良好修整的砂轮对光学玻璃BK7进行磨削加工。磨削试验结果和亚表层完整度评价结果表明新开发的大磨粒金刚石砂轮修整技术的可行性,也验证大磨粒金刚石砂轮只要经过精密修整是可以应用于光学玻璃的延展性超精密磨削加工的,并能实现纳米级的表面粗糙度,显示出大磨粒金刚石砂轮在加工难加工材料和硬脆材料中的良好应用前景。
Firstly, the 151μm abrasive grain electroplated nickel-based single-layer diamond grinding wheel was trimmed with high efficiency by using 91μm abrasive cup-shaped copper-based diamond grinding wheel as dresser combined with ELID (Electrolytic in- process dressing). At the same time, the force of grinding wheel was monitored by using dynamometer under the best dressing parameters. The coaxial optical displacement detection system was used to monitor the surface condition of grinding wheel. The error of 151μm grinding wheel rotation was reduced to 1 ~ 2μm range, at the same time, all the diamond abrasive grains on the grinding wheel are trimmed to a flat surface and have a constant circumferential envelope, at which point the grinding wheel achieves the best working condition. The optical glass BK7 is then ground using a well-finished grinding wheel. Grinding test results and sub-surface integrity evaluation results show the feasibility of the newly developed large abrasive diamond wheel dressing technology, and also verify that the large abrasive diamond wheel can be applied to optical glass ductile ultra-precision grinding Processing, and nano-surface roughness can be achieved, showing the large abrasive diamond grinding wheel in the processing of hard materials and hard brittle materials in the good prospects.