Camshaft working conditions and materials

Camshaft working conditions and materials

The camshaft is a component in a piston engine. Its function is to control the opening and closing of the valve. Although the speed of the camshaft in a four-stroke engine is half that of the crankshaft (in a two-stroke engine, the speed of the camshaft is the same as the crankshaft), but usually its speed is still very high and it needs to bear a lot of torque. Camshafts have high requirements in terms of strength and support, and their materials are generally high-quality alloy steel or alloy steel. Since the valve motion law is related to the power and operating characteristics of an engine, the camshaft design occupies a very important position in the engine design process.

The cam bearing is subjected to periodic shock loads. The contact stress between the cam and the tappet is very high, and the relative sliding speed is also very high, so the wear of the cam working surface is more serious. In view of this situation, the camshaft journal and cam working surface should have higher dimensional accuracy, smaller surface roughness and sufficient rigidity, as well as higher wear resistance and good lubrication.
Camshafts are usually forged from high-quality carbon steel or alloy steel, and can also be cast with alloy cast iron or ductile iron. The journal and cam working surface are polished after heat treatment.

Zhejiang Junrong Auto Parts Co., Ltd. is a professional enterprise engaged in the research, development, production and sales of automotive camshafts. With a registered capital of 10 million yuan, it has now become a major supporting supplier for well-known automobile brand manufacturers such as Shanghai Automobile, Geely and Zotye. The company's predecessor was Zhejiang Taizhou Xinke Precision Machinery Manufacturing Co., Ltd. In 2009, it planned to build a 300,000 V6 assembled camshaft production line of SAIC GM Group and supply it with the end of the same year. In 2014, it expanded its scale and re-registered Zhejiang Junrong Auto Parts Co., Ltd. . In 2015, the company purchased 40 acres of land in Huzhou City, Zhejiang Province to build a new plant, expanded two professional production lines with an annual output of 700,000 camshafts, and put them into full production in January 2016. In the same year, it purchased 50 acres of land in Jiangxi to build camshaft blanks. base.