A study of the relationship between cutting force and machined surface roughness with the feed per tooth when milling EuTroLoy 16604 material produced by the DMD method

Introduction. Currently, a substantial proportion of the machine-building industry is made up of one-off products or products manufactured in small batches. In this regard, innovative approaches to obtaining such products are being actively applied in order to reduce the cost of special, expensive tooling of the blanking process. Such technologies include the Direct Metal Deposition (DMD) method, the essence of which is the deposition of metal particles from a gas-powder stream. This method has a lot of advantages, but one of the main drawbacks is that the products after growing have a rough surface and do not meet the accuracy requirements of the finished part drawing. Consequently, the parts require further machining by cutting. However, due to the novelty of the materials, there are no regime parameters for machining. In this regard, the aim of the work is to establish the functional relationship between the cutting force and roughness of the machined surface with the feed per tooth during end milling of EuTroLoy 16604 material formed by DMD-method. In this paper an experimental study of cutting force and roughness of machined surface with varying the tooth feed during end milling is carried out. The research method is an experiment on milling of EuTroLoy 16604 material obtained by DMD-method with measuring the output parameters of the process (cutting force and roughness of the machined surface). Results and discussion. The measured values of cutting force and roughness of the machined surface allowed establishing functional and graphical dependences of the output parameters of the milling process on the feed per tooth. It is found that using a cutter with a smaller clearance angle results in lower cutting forces and the surface has a lower height of microroughness. Thus, the developed functional relationships of cutting force and roughness of the machined surface with the feed per tooth allow predicting the output parameters of the cutting process and increasing the efficiency of machining operations by cutting. A promising direction for further work is seen in the study of relative machinability and evaluation of its quantitative value.