装配式中空凸轮轴凸轮材料及装配技术研究

研究了装配式中空凸轮轴的两个关键技术:凸轮材料和连接技术.本试验凸轮材料采用铁基粉末冶金材料,并对其工作表面进行宽带激光表面淬火处理.研究结果表明,经激光处理后,材料的耐磨性得到了明显的提高.凸轮与芯轴的连接采用滚花连接技术,对不同齿距的滚花式凸轮轴静连接强度及疲劳强度进行了实验研究.研究结果表明,制成的凸轮轴在静扭时的破坏扭矩约是凸轮轴实际工作扭矩的20～30倍,疲劳破坏方面亦符合工作要求.

The study of cam materials and assembling technology of composite hollow camshafts

The two key technique of composite hollow camshafts were studied in this paper: cam materials and joining technique. Cam materials used ferrous P/M materials, and work surface were treated with wide-band laser surface quenching. After laser quenching, the wear resistance of cam materials were evidently improved. The joining of cam and core-shaft used shave-joining technique. The static joining strength and fatigue strength of camshafts with different space between tooth were studied. The destroying torsion of camshafts was 20 - 30 times as many as its actual work torsion, and its fatigue strength also met its work request.