Abstract
Current demands on quality are the engine of searching for new progressive materials which should ensure enough durability in real conditions. Due to their mechanical properties, however, they cannot be applied to conventional machining methods. In respect to productivity, one of the methods is the finding of such machining technologies which allow achieving an acceptable lifetime of cutting tools with an acceptable quality of a machined surface. One of the mentioned technologies is trochoidal milling. Based on our previous research, where the effect of changing cutting conditions (cutting speed, feed per tooth, depth of cut) on tool lifetime was analysed, next, we continued with research on the influences of trochoid parameters on total machining force (step and engagement angle) as parameters adjustable in the CAM (computer-aided machining) system. The main contribution of this research was to create a mathematical-statistical model for the prediction of cutting force. This model allows setting up the trochoid parameters to optimize force load and potentially extend the lifetime of the cutting tool.
Highlights
The possibilities of the predictive model are control of the machining process in order to reduce vibrations, increase the stability of the cut and efficiency of the cutting process [19]; and trochoidal milling in connection with finish operations in machining superalloys based on nickel [20,21,22]
The total machining force F is the action force the tool exerts on the workpiece and at which it is pressed into the machined material
The primary task of the experimental part of the research was trochoidal grooving of the steel by a vertical machine tool, with the setting of various parameters of the trochoidal path and continuous recording of the cutting forces by a stationary dynamometer to achieve knowledge about the influence of these parameters on a load of the cutting tool. As it was mentioned in the previous part, this research builds on previous analysis of tool wear due to cutting parameters
Summary
Research of the productivity issue is relevant mainly in such industry areas where it is necessary to solve the removal of a large volume of material in a short time. Sci. 2020, 10, 1788 application of materials known to be hard-to-machine, a variety of methods known as productive technologies have been developed. In this area, research focuses mainly on cutting parameter adjustment or tool path optimization [1,2,3]. Research focuses mainly on cutting parameter adjustment or tool path optimization [1,2,3] It studies chip formation [4] and selected parameters of surface integrity [1,5]. Correct implementation of the technology allows meeting the ever-increasing requirements for product quality with adequate productivity [5,9]
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