Substantiation of the Design of a Device for Machining Camshaft Cams by the Friction-Mechanical Method

An analysis of traditional friction-mechanical antifriction coating application schemes, as well as devices for their implementation, have shown their effectiveness in treating surfaces of parts with the shape of a body of revolution. However, for machining complex profile surfaces, which include camshaft cams, the use of such schemes is unacceptable due to the lack of stable contact between the tool and the part. The aim of the presented work is to substantiate the design and develop a device for finishing antifriction non-abrasive machining of camshaft cams by friction-mechanical method. The ways to achieve the goal are determined - to provide the necessary trajectory of movement of the tool or part, which copies the shape of the cam and creates the necessary conditions for the qualitative implementation of the selective transfer of antifriction material to the working surface of the part. This can be achieved through the use of a lever-type tool loading scheme that ensures a constant tool pressure force on the cam surface, taking into account its geometry. The proposed approach made it possible to develop the design of a device for applying antifriction coatings with a finishing antifriction non-abrasive treatment to the working surface of camshaft cams. Another approach to solving this problem is to use the design of a device containing copying and rubbing units. The presence of copiers in the proposed device ensures the creation of reciprocating and rotational movement of the tool along a trajectory corresponding to the shape of the cam with the required stable force. The justification of the device designs allows us to assert the possibility of providing high-quality conditions for the finishing antifriction non-abrasive machining of camshaft cams. Experimental studies that require the manufacture of the device and testing in laboratory or production conditions will allow you to choose the most effective design from the two options.