超声辅助磨削工艺对微晶玻璃表面粗糙度的影响研究

Study on the effect of ultrasonic-assisted grinding process on the surface roughness of microcrystalline glass

微晶玻璃的高脆硬性会导致其在磨削过程中出现崩碎和裂纹等问题,从而影响其使用性能和寿命。文章针对微晶玻璃,开展了其超声辅助磨削加工试验研究,探究了磨削微晶玻璃的工艺参数(主轴转速、磨削深度及进给速度)和烧结磨头粒度号差异对其表面粗糙度和表面形貌的影响规律。研究结果表明:超声磨削可显著减小微晶玻璃的表面粗糙度值,在研究的主轴转速段内降幅2.03%~36.03%,磨削深度段内降幅9.76%~17.99%,进给速度段内降幅6.98%~36.23%;相比于非超声磨削,超声磨削在较小主轴转速、磨削深度及进给速度条件下更能发挥其对微晶玻璃表面粗糙度的提升作用;较小的磨头粒径能减小微晶玻璃的表面粗糙度值并改善表面质量。

The high brittleness and hardness of microcrystalline glass can lead to chipping and cracking during the grinding process,which affects its performance and lifetime.In this paper,an experimental study on ultrasonic-assisted grinding of microcrystalline glass was conducted to investigate the influence of the process parameters(spindle speed,grinding depth and feed rate)and the difference of sintered grinding head grit number on the surface roughness and surface topography of microcrystalline glass.The results showed that ultrasonic grinding significantly reduced the surface roughness values of microcrystalline glass by 2.03% to 36.03% in the studied spindle speed section,9.76%to 17.99% in the grinding depth section,and 6.98% to 36.23% in the feed rate section;compared with non-supersonic grinding,ultrasonic grinding was more effective in improving the surface roughness of microcrystalline glass under the conditions of smaller spindle speed,grinding depth and feed rate.The surface roughness of microcrystalline glass was improved by ultrasonic grinding with smaller spindle speed,grinding depth and feed rate.