关键词: 机械制造工艺与设备 , 气门座圈 , 气门导管 , 金属陶瓷 , 可转位刀片 , 组合刀具

Abstract: Through machining experiments, it is found that ceramal is an appropriate cutting material for valve seats made of Cr-Mo-Ni powder metallurgy, from point of view of whether the machining ac?curacy or tool-life. A new technique to macnine valve seat conical hole was proposed. Structures of in- dexical inserts and precision combined cutting tools were designed also.

Key words: technology and equipment for machine building , valve seat , valve guide , ceramal , indexi- cal insert , com Dined tool