RU1563056C - Method of finishing involute profiles of teeth of cylindrical gear wheels - Google Patents

Abstract

The invention relates to mechanical engineering and can be used for finishing and finishing processing of involute tooth profiles of spur gears after their preliminary shaping. The purpose of the invention is to expand technological capabilities by combining cutting and surface plastic deformation by varying the sliding speed. To achieve this goal, they use a tool in the form of a cup cutter, the cutting part of which is made in the form of a wedge, and the tool is informed by independent rotation, which makes it possible to select the required sliding speed, the value of which is set according to the dependence V _c = V _R / C, where V _c is the slipping speed of the cutting wedge in the cutting zone, V _R is the cutting speed, C is the constant elastic-plastic properties of the material of the machined wheel. By changing the magnitude and direction of the total cutting speed, ensuring the movement of the cutting wedge of the tool with the cutting speed V _R in the direction of chip formation, and with the sliding speed V _ck in the direction perpendicular to the vector of this movement, it is possible to increase the microhardness from the initial one by a factor of 1.5 - 2 . 1 ill.

Description

The invention relates to the field of mechanical engineering and can be used for finishing and finishing processing of involute tooth profiles of gears after their preliminary shaping.

The purpose of the invention is to expand technological capabilities by combining cutting and surface plastic deformation processes by varying the sliding speed.

The drawing shows a profile of tooth profiling according to the proposed method.

The choice of a constant ratio of cutting speeds (VR) and sliding (VCK), taking into account the elastic-plastic properties of the processed material

(with i const) provides pop ck

the immense effect of finishing and hardening of volvent surfaces.

To implement the proposed crtd-, both use a tool in the form of a tea cutter 1, the cutting part of which is characterized by the following angles: the front cutting angle, Y, the rear angle and the taper angle /} The involute of the uba of the wheel 2 is formed in section K when the wheel is turned by the angle ICH - and agreed counter course

2K

tool along the OY axis from point A to touch with the main wheel circumference. The rate of oncoming movement of the tool is determined from the ratio;

VR 2-G0.k -HlKZK- -AJ1-l - / -,

Spent

25 kih zu rument rogo together with him

Zo skalz cutting of the wife,

35

where sB + ar ctgc. - the angle of involute of the main circle: wheels ha) {- the radius of the main

wheel circumference pc - speed

wheels

ZK - the number of teeth of the wheel. This ensures that the involute is copied in the profile section of the bottom 50 where v forests are point A of the tool.

The choice of a given wheel speed pc will provide a constant cutting speed v (for the wheel being machined. The rotation of the tool around its own axis of nights is

what, with whom during the process of variating the use of a tooth

4d jointly shifting the knuckle rotated

., speed definiteness

$

0

provides the ability to select the required sliding speed (VCK) in accordance with the previously specified Ve

value, i.e. VCK -, where u is constant in the elastic-plastic properties of the material. For machining the entire tooth rim, a longitudinal feed is provided along the tooth rim.

Thus, by changing the magnitude and direction of the total cutting / cutting speed, ensuring the movement of the cutting wedge of the tool with the cutting speed vft in the direction of chip formation and with the sliding speed vЈ in the direction perpendicular to the vector of this movement, it is possible to increase the surface microhardness from the original in 1.5-2 div.

Claims (1)

The claims The method of finishing processing involute tooth profiles of cylindrical gears with a rotating tool, the profile of the cutting part of which is made in the form of a wedge, and the wheel is informed of rotation consistent with its longitudinal movement when the cutting edge slips in the cutting zone with a given sliding speed, characterized in that that, in order to expand technological capabilities by combining cutting and surface-plastic deformation processes by varying the sliding speed, a tool is used in the form of a cup-shaped tooth-cutting tool, which report reciprocating movements in the plane of the main circle with a constant speed from the head to the foot, while the rotation speed of the tool is set equal to sliding speed, the value of which is determined in accordance with the dependence: v .XЈ Vcc with Ck - slip rate a cutting wedge in the cutting zone; vft is the cutting speed; c - constant elastic-plastic properties of the material of the processed wheel.