SU112319A1 - A method of manufacturing gear wheels of a large module and device for its implementation - Google Patents

Description

Currently, large modulus gears are made by rolling. However, using this method it is impossible to obtain gear wheels of the second class of accuracy which would satisfy the requirements of the automotive industry.

The proposed method allows to obtain gear wheels of increased accuracy, which is achieved by dividing the rolling process into two stages - hot and cold rolling, which are carried out successively on the same rolling step without reversal.

This method is proposed to be performed with the help of a device in which one smooth bar, one toothed roller and two pairs of side rollers are used as working bodies.

FIG. Figures 1 and 2 show two projections of the device for carrying out the proposed method.

The working device of the device has one rolling cogged roll 1 with a rounded apex of the tooth, one smooth roll 2 n two pairs of side rollers 3 and 4. Two half-ring inductors 5 and J are attached to the device (for heating by high-frequency currents of the workpiece area. There are dividing mechanisms on the gear wheel, consisting of the reference wheels 7, 8 and 9.

The manufacture of gears with this device is carried out in the following order.

The blank 10 is put on the clamping device I, after which the rolls are rotated. Then, high frequency current is applied to the inductors 5 n 6 to heat the workpiece. The pre-heated workpiece 10 is first fitted with a smooth roller 2 and side rollers - /, which limit the deformation of the crimped: 1 metal of the workpiece on its right side.

Maintaining the correct interceptor distance between spindles 112319-

Lem 12 of the clamping device - and the axis r,; ia; iKoro, the roll 2 is provided with push-rods 13 and 14.

After rolling the billet with roller 2, a toothed roller / and side rollers 5 are suitable for it, and the process n, the roller-roller with a toothed roller, takes place. During the rolling process, the billet and the roll are lubricated with graphite powder, which is fed into the rolling ash from the box 15 by the swath shaft 16 Deformed. The compression of the metal to the rim of the workpiece 10 is limited by the side rollers 4. and the side rollers partially straighten the rim of the workpiece / O and prevent the formation of oblo on the tooth ends. After the end of the hot rolling process, the ICs 5 and 6 are disconnected from the high-frequency current source and the teeth are adjusted without having to align the rolls 1 and 2 within about -20 seconds to create the correct tooth involute.

This is the end of the hot rolling process. Y and 5 with rollers 3 and 4 move away from the gear.

Then, a pinch of etching of scale is removed from the gear wheel and a toothed roller / with calibration teeth for cold rolling is fed into the device.

Cold rolling gear is the same as hot rolling. When this m is rolled, a nip of 0.10-0.15 mm is rolled onto the side along the working surface of the tooth, left after the hot rolling. Such a sequence of operations during rolling allows to obtain gear wheels of the second class accuracy.

Subject invention

Claims (2)

1. A method of manufacturing gear wheels of a larger module by rolling, distinguished by the fact that, in order to obtain gear wheels of increased accuracy, the rolling process is divided into two ethanes — hot and cold rolling, carried out successively on the same rolling mill. camp without reverse. 2. A device for carrying out the removal procedure according to claim 1, characterized in that its working bodies include: one smooth wa, one toothed roller, having a rounded tooth verigin, and two pairs of side rollers 3