基于新型金刚石砂轮的Al2O3陶瓷磨削性能

摘要

A new diamond grinding wheel was prepared by powder injection molding and vacuum brazing,the new diamond wheel had a larger number of cutting edges which were artificially ordered so as to have big chip storage space,and it realized strong adhesion between diamonds and brazing al-loy due to vacuum brazing.The paper discussed the grinding performance of the new diamond wheel in machining Al2 O 3 ceramic.The experimental results indicate that the quality of the machined work-piece surface is better than that machined by the conventional resin bond diamond wheel,the surface roughness is as 0.68 μm when the feed speed is as 40 mm/sec and the depth of grinding is as 40 μm, and the forces decreases by 12%~17% in compassion with conventional resin bond diamond wheel, and grinding temperature is reduced 80~120℃.%利用粉末注射成形和真空钎焊技术制备了一种新型金刚石砂轮，制备的新型金刚石砂轮具有金刚石把持力大、金刚石微刃有序排布等特点。进行了基于新型金刚石砂轮的 Al2 O 3陶瓷磨削性能研究。实验结果表明：相对于普通树脂结合剂金刚石砂轮，新型金刚石砂轮磨削 Al2 O 3陶瓷的加工表面形貌完整性较好，宏观裂纹和表面损伤相对较少；表面粗糙度较小，当进给速度为40 mm/s、磨削深度为40μm 时，加工表面粗糙度 Ra 在0.68μm 左右；在相同实验条件下，新型金刚石砂轮的磨削力减小了12%~17%，磨削温度降低了80~120℃。