Experimental study on lapping ceramic balls with variable-radius groove plate. (July 2021)

• Record Type: Journal Article
• Authors: Zhou, Fenfen; Yao, Weifeng; Yuan, Julong; Lyu, Binghai; Zhao, Tianchen; Zhao, Ping
• Is Part Of: Advances in mechanical engineering. Volume 13:Number 7(2021)
• Publication Date: 2021-07
• Subjects: Ceramic balls -- lapping -- variable-radius groove -- Taguchi method -- roundness; Mechanical engineering -- Periodicals; 621.05
• DOI: 10.1177/16878140211033416
• Languages: English
• ISSNs: 1687-8132

Abstract

The method of lapping precision ball with variable-radius groove is developed in recent years. An experimental study on lapping ceramic balls with variable-radius groove was carried out. Taguchi method was used to design the orthogonal experiment of rough lapping, and the material removal rate ( MRR ) and the roundness were selected as evaluation indicators. The signal to noise ratio (S/N) and the analysis of variance were used to analyze experimental results. The optimal parameters combination with load pressure of 2.5 N/Ball, abrasive concentration of 10 wt% and rotation speed of 15 rpm was obtained. During rough lapping, the maximum reduction rate of average roundness is 50%, the maximum reduction rate of roundness deviation is 81%, the MRR is 16.9 μm/h, and the reduction rate of variation of ball lot diameter ( VDWL ) is 90%. After semi-lapping and polishing, the best surface roughness is up to 10 nm, the best roundness is 0.128 μm, and the VDWL is 0.24 μm. The surface roughness and VDWL of the five balls tested all meet the requirements of ceramic ball with G5 grade, and the roundness value is close to the requirement of G5. The variable-radius groove lapping method is very suitable for improving the precision of batch lapping for ceramic balls.