Increase of Efficiency of the Internally Cutting Mill with Composite Cutters when Cutting Trapezoidal Thread with Interrupted Elements

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Abstract

Purpose: to increase the efficiency of the internally cutting mill due to the developed method of setting the cutters to the calculated values of the angles of shock-free cutting. This allows expanding the technological capabilities of the fragile cutting tool material when cutting trapezoidal thread with the interrupted elements. An analysis of the stress-related characteristics of cutting tool materials of a group of composites is made. The paper shows that the main reason for the low efficiency of cutting elements of the internally cutting mill is the chipping of its cutting edges when inserting (output) the tool into the workpiece and passing through the interrupted elements of the thread, located on its surface. Methods: experimental studies are carried out on a lathe, with the installation on its support of a special device for threading, equipped with a replaceable internally cutting mill, having a set of thread cutters, the cutting part of which is made of a composite material. The quality of the machined thread surface and the accuracy of the execution are controlled by optical method using standard and special measuring instruments. Results and discussion: the rational values of the geometry of the cutting element and the cutting data of the trapezoidal thread by the internally cutting mill equipped with a set of composite cutting elements tuned for cutting into the workpiece with interrupted elements so that the meeting and thread formation occurred as a region of the front surface of the cutting element as far as possible from the cutting edges are presented. The use of the tuning method, protected by the Russian Federation patent, made it possible to increase the efficiency of the internally cutting mill and to extend the range of application of the composite tool material with interrupted cutting.

About the authors

E. A. Kudriashov

Email: kea-swsu@mail.ru
D.Sc. (Engineering), Professor, Southwest State University, kea-swsu@mail.ru

T. E. Kameneva

Email: Taska015@mail.ru
Southwest State University, Taska015@mail.ru

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