A 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 that of the crankshaft), but usually its speed is still very high, and it needs to withstand a lot of torque, so the design of The camshaft has high requirements in terms of strength and support, and its material is generally high-quality alloy steel or alloy steel. Since the law of valve movement is related to the power and running characteristics of an engine, the design of the camshaft occupies a very important position in the design process of the engine.
There are three types of camshaft positions: lower, middle and upper. The camshaft of the lower-mounted valve mechanism is located in the crankcase, the camshaft of the middle-mounted valve mechanism is located on the upper part of the body, and the camshaft of the upper-mounted valve mechanism is located on the cylinder head.
In recent years, the rapid development of the automobile industry has put forward many new requirements for the performance, technical level, quality and output of the engine and its components. The camshaft is one of the key parts of the intake and exhaust system of an internal combustion engine, and the entire intake and exhaust system is driven by the camshaft. Because the camshaft has the characteristics of complex shape, poor rigidity and high processing accuracy, it has always been one of the difficulties in the manufacture of automobile internal combustion engine parts. Grinding is one of the key processes in camshaft processing and plays an important role in the processing technology. The quality of the grinding affects the performance of the entire camshaft and even the engine.
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