Tool Wear Characters in Micro-milling of Fully Sintered ZrO_2 Ceramics by Diamond Coated End Mills

摘要

This work presents an experimental investigation on micro-milling of fully sintered Zirconia (ZrO_2) by diamond coated tools. The experiments were conducted on a Kern MMP 2522 micro-milling centre and WC micro end mills, diamond coated by chemical vapour deposition (CVD) and of stiff geometry were employed as cutting tools. The effects of cutting parameters and milling time on tool wear were investigated. The results revealed that the tool wear characters included diamond coating delamination and wear of substrate WC. Both cutting forces and machined surface quality were affected by tool wear with the progress of milling.