粉末冶金气门导杆孔和垫圈座切削特性分析

Analysis of Cutting Characteristics of P/M Valve Guide Hole and Gasket Seat

针对某装备发动机缸盖特种粉末冶金气门导杆孔和垫圈座存在的加工刀具磨损快等问题,为解决该类粉末冶金材料切削技术难题,采用不同刀具,在不同切削试验条件下分析该类粉末冶金材料切削力规律以及表面粗糙度变化规律,确定合适的刀具材料和加工参数,研究结果表明,该种粉末冶金材料在同等加工条件下,陶瓷刀具会比硬质合金刀具受更小的切削力,可获得更小的表面粗糙度,在气门座圈批量化生产过程中,刀片材料选陶瓷刀。

Aimed at solve the problem of fast tool wear in machining the special p/M valve guide hole and gasket seat of engine cylinder head,In order to solve this kind of powder metallurgy material cutting technology problems,Using different cutting tools,The cutting force and surface roughness of this kind of P/M material were analyzed under different cutting test conditions,Determine the appropriate tool material and processing parameters,The results show that under the same processing conditions this kind of powder metallurgy material,Ceramic tools will be subject to less cutting force than cemented carbide tools,Smaller surface roughness can be obtained,In the process of mass production of valve seat ring,Ceramic blade material is the best choice。