Kapelushny F. Improvements of technology of thermal processihg of piston fingers of diesel engines at their restoration

Piston fingers of diesel engines. To promote yacost piston fingers at their renewal by the improved heat treatment. Fizico-matematichni methods are the research methods of design of process of heating, cooling and change of external to the diameter of piston fingers on the basis of theory of the electro-contact heating, metalografichniy, rentgenostrouctourniy, x-ray photography micro spectral, оже-analyses, measuring of temperature, wearproof, durability. First ob-rountovano application of electro-contact method of heating, the combined spreyernogo cooling for renewal and strengthening of piston fingers. Dependence of remaining deformation is set on the modes of heating and cooling. Distributing of temperature, tensions, structure is experimentally explored, phisics-mechanical properties of surface of the picked fingers up thread, it is projected and the device is built for renewal by the offered method. A process is the article of research of change of external to the diameter of tubular bodies by theoffered method. It is accepted to introduction in repair production. Economic efficiency on one piston finger made 6,743 UAH