SU984747A1 - Round gear-cutter - Google Patents

Description

The invention relates to cutting tools for machining tooth gears and can be used for manufacturing machine parts. A round hole is known for machining gear wheels, on the casing of which are arranged with circumferential steps a row of teeth oriented in the axial direction 1.

A disadvantage of the known hammer is the low productivity of the treatment due to the presence of reverse idle strokes during gear cutting.

The purpose of the invention is to increase productivity.

The goal is achieved by the fact that the rows of teeth are located: in groups, the circumferential steps between the nearest rows of neighboring groups are made unequal and multiple round steps between the rows belonging to the same group, and the teeth of the neighboring groups are directed in opposite directions.

The number of circumferential steps between the rows belonging to one group, constituting a complete circle, is not a multiple of the number of teeth of the wheel to be machined.

 FIG. .1 is a dolphin k, general view; in FIG. 2 is a view of FIG. one; in fig. 3- round dolb to meshes with the gear wheel to be machined.

Rows of teeth 2 are located on the housing 1 of the dredge, and the rows are arranged in groups 3, in this case two rows in one group.

ten

The nearest rows 4 and 5 of the neighboring groups 3 and 6 are located with enlarged circumferential steps δ, multiple of the circumferential steps ac, and the mecda of Dami 4 and 2 belonging to the same group.

15 In this case, 0ti 2c (p.

The teeth of neighboring groups are directed in opposite directions B and C. The number of circumferential steps ac, which is a complete circle d, is not a multiple of

20 number of teeth z processed. Wheels 7.

Round dolby to works on the method of rolling. It also receives radial feed and working reciprocating 25 translational movements along its axis. The axial stroke of the bit is greater than the distance f between adjacent teeth of the row. The axial stroke of the groove in each direction is adjusted so that it starts when the first row of teeth of the group hits, and ends when it leaves the mesh with the gear wheel of the second row of teeth of this group.

When passing through the cutting zone of the area between adjacent groups of tooth-free, there is no contact between the cutting wheel and the gear wheel. At this time, the direction of the axial stroke is reversed. Thus, when reversing, the chamfering teeth are eliminated. Due to the fact that the number of steps c on the circle d is not a multiple of 2, all the teeth of the wheel to be machined are gradually profiled during the machining cycle.

The use of the proposed hammer allows an increase in the productivity of gear cutting of spur gears.

Claims (2)

1. Round dolb for processing gears, on the case of which placed with circumferential steps of the rows of teeth, oriented axially, characterized in that, in order to increase the productivity of processing, the rows of teeth are arranged in groups, with the circumferential steps between the nearest rows of neighboring groups made multiple times the circumferential steps between the rows,. belonging to one group, and the teeth of neighboring groups are directed in opposite directions. 2. Dolby to p. 1, characterized in that the number of circumferential steps between rows belonging to the same group, which is a complete circle, is not a multiple of the number of teeth of the wheel to be machined Sources of information taken into account in the examination 1, Loskutov V.V.Tubing machines. M., Mechanical Engineering., 1978, p. 118, 79.