Lay-out of cutting blades in an assembly basic rack of a counterpart rack for hob gears

Abstract

Nowadays many Russian tool-making facilities which produce a metal-cutting tool for a processing of coarse-pitch tooth-wheels do not offer constructions of assembly hob gears with replaceable hard-alloy carbide blades. Creation of the assembly constructions for machine-building enterprises with the replaceable hard-alloy carbide blades (RHACB) is an effective solution for the processing of tooth wheels. Thanks to it productivity existing equipment increases many-fold, economical effectivity caused by implementation of the high-capacity tool allows to purchase modern equipment and make work of machine operators more effective and less labour-intensive. In this paper we offer a radical technical solution which allows to increase production efficiency of mechanical processing by a tool with lay-out of the hard-alloy carbide blades in the assembly basic rack of the counterpart rack in hob gears. Implementation of a group scheme in the assembly counterpart cutting rack is reached by means of usage of big amount of basic and side carbide blades on an Archimede’s tool worm that allows to cut away surplus consecutively and decrease depth of cut on the carbide blades. Also it allows to provide evenness of cutting and also decrease a value of blow stresses on cutting elements of the assembly tool. Due to usage of the replaceable hard-alloy carbide blades resistance and reliability of the assembly gear hob increases.