SU1287998A1 - Cutting tool head - Google Patents

Abstract

The invention relates to the field of mechanical engineering, it is intended for machining gear wheels with a circular tooth and allows to expand technological capabilities by machining wheels with a modified tooth groove profile. The cutting head includes a housing 1, in the slots 2 and 3 of which standard incisors 4 are installed. Some incisors 4 process the theoretical groove profile, others process modified sections of the tooth profile. The grooves 2, in which the cutters 4 are installed, which process the modified areas, are turned relative to the plane passing through the center of the head and the cutting edge of the profiled cutter. The reversal of the tool is determined by the calculated radius Gr and the turning angle. 2 Il. (L 1s 00; about: about 00 .1

Description

The invention relates to mechanical engineering and can be used when cutting gears with circular teeth.

The purpose of the invention is to expand technological capabilities by treating gears with a modified cavity profile.

FIG. 1 shows a cutting head; in fig. 2 shows a cutting scheme with a cutting head.

The cutting head comprises a housing, in the slots 2 and 3 of which the standard cutting tools 4 are installed in alternate order, with a part of the cutters 4 being profiling, and a part processing a modified portion of the tooth root profile of the wheel. The grooves in which incisors are installed that process the modified section of the tooth root profile are turned relative to the plane passing through the center of the head and the cutting edge of the main tool.

The turn of the groove in which the cutters are installed that process the modified profile section is determined by the calculated radius of the separating straight line, determined from the relation:

7 l / g - l ga-ji (A iTiT-gjif igc-j-iH) -hq,

where D is the coefficient of the modification depth; jjo is the height coefficient of the modifier and;

Zp is the calculated cutting edge radius for the unmodified section of the profile;

tn-normal module; iif is the ratio of the height of the tooth stalk; 0 is the angle of the profile of the original contour. The angle of rotation L is determined from the relation:

0

0

five

age cm

 ip + 2-gr-lch - t . - gr |

L .. rj. "4irt, M. -Al

2t J3 in

The cutting head works as follows.

With the coordinated movement of the head and the workpiece, the profiling cutters, whose middle line passes through the center of the head, form the theoretical tooth profile in the area of the sun. The incisors located in the unfolded slots form modified sections with D.

The use of a head allows the profile modification of the tooth and improves the reliability and performance of the gear. You can use the head of the same type incisors, which reduces their range.

Claims (1)

Invention Formula A cutting head, in the housing grooves of which the alternating cutters and cutters are machined, which process the modified section of the wheel tooth profile, which, in order to expand technological capabilities, the grooves, in which the cutters are installed, which process the modified section of the tooth cavity profile, deployed relative to the plane passing through the center of the head and the cutting edge of the main tool. h MLKHL  V- A; ; FIG. g