SU975264A1 - Toothed gear cutting method - Google Patents

Description

(54) METHOD FOR CUTTING GEAR WHEELS

one

The invention relates to the field of metalworking and can be used to process the convex teeth of gears, whose profile is outlined along the involute of a circle of arbitrary radius.

There is a known method of cutting gear wheels, according to which the manufacture of teeth is carried out by the method of rolling with periodic dividing, while the tool is informed about the rotation around its axis, and the workpiece is informed about the rotation around the center, which does not coincide with the geometric axis of the wheel, kinematically tool rotation is located between the axis of the wheel being cut and its center of rotation.

However, this method cannot obtain the profile of the tooth of the wheel being cut in the form of a convex involute of a circle of arbitrary radius.

The aim of the invention is to obtain convex teeth on the wheel to be machined, circumscribed in an eVolvent of an arbitrary radius.

This goal is achieved by setting the gear to be machined so that its geometrical axis is

located between its center of rotation and the center of rotation of the tool.

The drawing shows a diagram of the relative position of the tool 1 and the workpiece of the wheel being cut,

where Y is half the angle of rotation of the wheel being cut, at which the metal is removed if the treatment is carried out in one pass; ot angle of engagement; Hz radius divider;

10 IQU-radius of the tips of the teeth; Gk - radius dividing chop the wheel; Gats-radius of the tops of the teeth cut

wheels;

 the radius of rotation of the cut wheel (distance from the center of rotation of the wheel C to the point P touching the initial surfaces);

Got-radius of a circle, the evolyutous of which outlines the profile of the tooth of the cutting wheel.

Claims (1)

The tool 1 and the workpiece 2 are reported to have coordinated rotational movements (Jy and A. The tool rotates around its axis Ots, and the workpiece around its center of rotation C. The geometric axis of the wheel O lies between its center of rotation C and the axis of rotation of the tool O. After turning the wheel on the angle 2 is divided. The value of jf is determined from the relationship (PG - (au - dk)) arccos 2 (. (where Hz is the radius of the dividing groove; and is the radius of the tops of the teeth of the haul; G | is the radius of the dividing wheel ; fdK is the radius of the tops of the teeth of the cut wheel; Gf - ra rotational angle of the wheel to be cut (distance from the center of rotation of the wheel C to point P touch the initial surfaces); When cutting according to the proposed method, convex teeth are obtained on the gear wheel, the profiles of which are circumferentially circumscribed by an involute of a circle with radius of Pr-C08c. Example: To cut a gear with the parameters: number of teeth Z 36, module w 6; radius of the main circumference g 202.97 mm, we used a slot 1 1st dolphin with the number of teeth Zy 17. The processing was carried out on a 5B150 gear shaping machine. The workpiece was installed on the machine table with the help of a special device. At the same time, the rotation radius of the cut Gf wheel was 16 mm. The dividing guitar was tuned according to the formula 2c lel 2f. After turning the table through an angle of 2-26 °, the table went out of engagement, the table returned to its original position and the division was again performed. The proposed method makes it possible to reduce the range of cutting tools when cutting teeth in the form of a convex evolvent of a circle of arbitrary radius. Claims method of cutting gear wheels by the rolling method with periodic division, in which the tool is informed about the rotation around its axis, and the wheel being processed is informed about the rotation around the center that does not coincide with the geometric axis of the wheel, kinematically associated with the rotation of the tool, characterized in that In order to obtain convex teeth, the profile of which is outlined along an involute circle of arbitrary radius, the gear wheel is set so that its geometrical axis is located between at its center of rotation and the center of rotation of the tool. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 489601, cl. In 23 F 9/04, 1975.