Method for producing a piston ring
A technology for piston rings and rings, which is applied in the field of manufacturing piston rings with interfaces, can solve problems such as unrealizable processing technology, and achieve the effects of improving grinding results, reducing wear and improving friction characteristics.
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[0020] In principle, the single figure shows a piston ring 1 , in particular a compression piston ring, which in this illustration has a sliding surface 2 , an inner peripheral surface 3 and an upper ring side surface 4 . In addition, the piston ring 1 also has a connection 5 . In this exemplary illustration, the piston ring 1 is supposed to be provided with a PVD layer 2' applied in the region of the sliding surface 2. As already mentioned, such a hard sliding surface has an effect on the inherent stresses of the piston ring 1 . This is particularly the case from the point of view of the different thermal expansions between the (softer) base material and the (harder) PVD layer of the piston ring 1 , which have a negative effect especially on the interface region 5 . This means that the interface region 5 is elastically deformed radially outward and thus produces an increased contact force in this region against the friction fit, for example a cylinder liner. In order to ove...
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