Příspěvek k hodnocení trvanlivosti řezných nástrojů při upichování korozivzdorných ocelí

Abstract

In industry, a promotion of strategically significant products of this field, such as cutting tools, machine tools and device, forming machine tools or machine for additive technology, are constantly being discussed. All these products require a needed research and development for their innovation due to place demand on durability, quality, accuracy, productivity, reliability, production costs, etc. After development of progressive cutting tools, innovation of new multi-functional machine tools, it is necessary to appropriately design whole machining process include cutting conditions and machining parameters for achievement of pre-determined goals. Different factors, such as machine tools, cutting tools materials and cutting geometry, machined material and its structure, cutting conditions, are entering into design of machining process and a knowledge of given technology is necessary. For the purpose of increase one of this crucial factor, durability of cutting tool, surface quality, productivity of process etc., it is necessary to design an experimental machining process on the basis of verified methods. One of the possibilities is using Design of Experiment that enables to design and analysis the process after incorporation the all-influencing factors on the basis of the results of selected response. The analysis of current state of machining of stainless steel focusing on parting-off technology is made in theoretical part of dissertation thesis. The aim of dissertation thesis is determine and evaluate parting-off process austenitic stainless steel, define cutting conditions, evaluate cutting tools wear, chip forming and quality of machined surface. It is necessary to determine benefits for R&D, practice and recommend a next research in this field on the basis of these results. Experimental activity is carried out in cooperation with company DORMER Pramet Ltd. and it is focused on parting-off process of austenitic stainless steel marked according W. Nr. 1.4404 (AISI 316L). It is alloyed steel with high content of chromium, using especially in all areas engineering, such as air industry, chemical industry, energy industry or medical industry. The object of experimental activity is a design parting-off process based on Design of Experiment – full factorial plan 2k included cutting conditions and parameters for used prototype coated exchangeable cutting inserts made of sintered carbide designed by DORMER Pramet Ltd.