CUTTING OUTPUT PARAMETER EFFECTIVENESS CONTROL BASED ON ANALYSIS OF MASS-DIMENSIONAL PARAMETERS OF REPLACEABLE HARD-ALLOY PLATES

The purpose of the work – development of recommendations on correct choice support of hard-alloy plate quality according to the conditions specified of plates operation. In the work there is formed a new approach to the analysis of hard-alloy plates of a metal-cutting tool which develops an approach existing in the RSSs and conditions a necessity to develop a metrological support of plate quality for the conditions of specified working conditions. The approach is based on the simultaneous account of some plate parameters by means of the introduction of conditional quality grades. The investigation results: - the impact of the value spread of mass and dimensions of plates upon plate quality is defined, - the criteria of their division into grades depending on a spread value are defined. Conclusions: the results of plate classification according to the parameters: “plate weight”, “plate length”, Plate width” and “plate thickness differ considerably; plate weight effects most the output parameters of part work-piece machining process, plate thickness impact is the smallest; home plate quality is not so acceptable for the billet high-performance machining of precision parts; the adaptation of acting RSSs to plates taking into account the requirements for modern NC machines; under current conditions a technologist of an engineering enterprise-consumer of plates is unable to order meaningfully their essential number because of the domination of low-quality plates.

Efficient technology for processing weld surfaces in case parts

A well-known technology of machining weld surfaces in case parts of freight cars is analyzed. Its drawbacks are defined and eliminated by means of the development of techniques based on the use of high-capacity combined cutters. Combined cutters ensure a high-capacity machining of weld surfaces during one travel and zero back angles increase expensive hard-alloy plate life by a factor of two. Cutters are tested in the course of mentioned surface machining which confirmed their high efficiency.