RISE OF DURABILITY AND RELIABILITY WORK OF ROLLER BURNISHING TOOLS

Abstract

The problem of obtaining accurate deep holes in sleeve-type parts is an urgent task of machining. The relaxation of oscillations in the adjacent operations of the existing technological processes leads to the appearance of undulations of the surface of the sleeves of the hydraulic cylinders.

The work is devoted to the issues of improving the construction of the roller burnishing separator, which allows to increase the durability and reliability of its work. As the tools for the plastic deformation of the metal which is processed, various rollers are used. The main element of a hard multi roller burnishing tool is a metal separator, which is the most vulnerable part. Оperation experience of rolling shows that during operation, as a result of high specific pressures of the roller on the separator, is complicated by a lubrication of the end surface of the roller despite the sufficiency of the lubrication of rolling during its operation. For the purpose of increasing a service life, reliability of the separator work, as well as to reduce the  labour intensity of manufacturing and reduce repair costs, during the operation of the roller burnishing tools, a method of reinforcement was applied by means of covering all surfaces of the separator slots with textolite plates.

The studies conducted allowed us to draw the following conclusions: the introduction into production of rolls with a separator, reinforced with textolite, can reduce the complexity of their manufacture by 1.5 times; the separator can be easily repaired several times by replacing textolite plates; оperation under production conditions of roller blades, reinforced with textolite plates, showed their high efficiency and technological reliability, which makes it possible to recommend this design of roller blades for widespread introduction into production.