Comparison of lapping performance between diamond magnetic abrasives and silicon carbide magnetic abrasives

Abstract

The hardness of hard-brittle materials is high, which results in the low lapping efficiency of traditional silicon carbide magnetic abrasive and short abrasive life. In view of this situation, a magnetic abrasive with diamond particle as lapping grit was developed. Using high purity iron powder as iron-based phase and diamond particle as abrasive, diamond magnetic abrasives were prepared by resin bonding method. K9 glass was chosen as the part being machined. The service life and processing efficiency of magnetic lapping K9 glass were compared between with diamond magnetic abrasives and with silicon carbide magnetic abrasives. The lifespan of diamond magnetic abrasive is 60.00 min, and the number of work-piece which can be machined is 4.6 pieces in the service life. The average surface roughness of K9 glass reaches 0.036 μm. However, the service life of the silicon carbide magnetic abrasive particles is only 40 min, and the average surface roughness of the K9 glass workpiece can only be processed to 0.222 μm. Besides, the number of workpieces that can be processed during the service life is 3.6 pieces. Diamond magnetic abrasives can effectively improve the service life, the processing capacity of magnetic abrasives, and the processing efficiency of magnetic grinding.

Keywords

• magnetic abrasive
• diamond
• silicon carbide
• service life
• lapping efficiency