The cutter speed determination of CNC laser cutting machines for precise calculation of objective function of tool path problem

Abstract

This paper deals with problems of optimization of tool path for CNC thermal cutting machines. We have chosen basic restrictions, for example, selection of piercing, selection of parts cutting sequence. They must be considered during development of NC programs. The paper considers optimization of tool path for CNC thermal cutting machines, namely minimization of cutting time and cost. The accuracy of objective function parameters calculation is investigated. The paper also reviews the operation speed of cutting tool for CNC laser cutting machines. It is usually a constant value, but conducted researches show that operation speed of cutting tool depends on some parameters, such as number of frames in NC programs, configurations, geometries and dimensions of parts. The correction parameters for operation speed of cutting tool for rectangle parts were obtained in previous works. The parts of various configurations, geometries and overall dimensions are also considered in this paper. Based on received results, average correction coefficients for operation speed of cutting tool have been obtained. These coefficients may be taken into account in order to calculate the objective function more accurately. In future work, the examples of tool path calculation will be considered taking into account the computation of objective functions with correction coefficients and without them.