Improving the selection methodology rational ways to restore parts when repairing machines

Abstract

Features of quality assurance of production at machine-building enterprises of repair profile are considered. It is revealed that a large number of methods and means of restoring worn parts are used in the repair of machines − mechanical processing, surfacing and welding, metallization and spraying, electrolytic build-up, plastic deformation, and many others. A critical description of the existing theoretical positions on the choice of the most appropriate ways to restore details is presented. It is revealed that the existing methods are based on the criteria of manufacturability, durability and economy and consider the problem of whether it is appropriate to choose a particular method of restoration for only one part forming a joint. A model has been developed to optimize the cost of repairing parts that form a joint, taking into account both the cost of restoring each part and the cost of processing them. Calculations are made for a certain probability of failure and a given resource according to the criterion of the lowest total costs.