OPTIMIZATION OF CUTTING MODES ON HEAVY MACHINES

Abstract

The optimization of the cutting process is of great importance for metalworking in ensuring the high quality of products and increasing its competitiveness. Increasing the efficiency of metalworking is based on the designation of optimal cutting parameters. It is determined that the economic criterion is the criterion of optimality: discounted costs, prime cost and productivity. The objective functional of the discounted costs and productivity which considers feature of cutting on heavy machines is generated. The limitations of the design of the machine and tool, work material and tool material, tool life, as well as the limitations caused by the quality of the tool operation is taken into account. Optimization of cutting modes is carried out simultaneously by two variables - feed S and cutting speed V. Optimal cutting modes should provide the maximum average productivity and minimum average cost. If several optimality criteria are used, optimization is performed for each of them. The final decision is made by comparing the obtained values. The average actual tool life is a random value. It was accepted that the durability period of carbide tools on heavy machine tools was distributed according to the Weibull law. It is established that the cutting process is characterized by a large number of interrelated factors influencing both the course and the result of the process. With increased requirements to the stability of the technological process of machining of parts, in determining the rational cutting parameters, the tool reliability is also taken into account