Advanced Design of a Gear Shaving Cutter with the Screw Cutting Edges for Finish Machining of Teeth of Gearwheels

Abstract

Designs of tools for finish processing of teeth of involute gears with the spiral screw cutting edges executed on one lateral face of rounds are known. Processing of tooth gears is made at the coordinated rotation of the tool and a part around the shafts and their conveyance relatively to each other in the axial direction of a part, and processing of the right and left side of a cross-section of teeth is possible only after reinstallation of a wheel. Lack of these tools is complexity of the design and manufacturing techniques. The design of the tool of the worm type for finish processing of teeth of involute gears is known (Authors: N. A. Chemborisov, R. M. Khisamutdinov, V. A. Avdeev) executed with the continuous screw cutting edges, at the same time its screw surface has a rectangular cross-section. Lack of this tool is that the cutting chock during its work has not quite satisfactory geometry: front and rear angles on the cutting edges are almost equal to zero. Also the tool (gear shaving cutter) for finish processing of teeth of involute gears executed with the continuous screw cutting edges, different from Chemborisov N. A. design is known by the fact that the cutting chock has a structurally executed rear angle (Authors: N. V. Smorkalov, V. P. Skripin, V. P. Ptitsyn, Yu. F. Belugin). As for this tool, the serial processing of the right and left side of a cross-section of teeth of a wheel by different screw cutting edges provides the increase in its firmness, and also significantly reduces auxiliary time, eliminating the need of reinstallation of a wheel and, thereby, increases the process productivity. The advanced design of a gear shaving cutter with the screw cutting edges is developed for finish processing of gear teeth which allows to improve the incision of the tool in metal, to reduce deformation of shaving and to improve its descent, to reduce the cutting force and power.