SU1641534A1 - Method for hobbing gears - Google Patents

Abstract

The invention relates to metal working, in particular, to the production of gear wheels. The purpose of the invention is to increase durability by creating active control over the distribution of the allowance between the two side cutting edges of the socket. During the incision stage, the torque developed by the cutting force is continuously monitored. When the torque reaches a set value, for example, zero, angular plunge stops 2 or less.

Description

This invention relates to metalworking, in particular to the manufacture of gear wheels.

The purpose of the invention is to increase durability by creating active control over the distribution of the allowance between the two side cutting edges of the groove.

Fig. 1 shows a diagram of the interaction of the blade and the workpiece of the gear to be machined; Fig. 2 is a schematic of the cutting allowance at different aisles.

The workpiece 1 of the wheel to be machined is set in the initial position for slotting relative to the slot 2. When slotting, the workpiece 1 reports the GI movement of the radial embedding into the part of the allowance sheared in the first pass, and the slot 2 the forward and return movement P2 of the cutting speed. At the same time, the dolb 2 is reported to be driven by the Bse circular feed, and the workpiece 1 is informed by the movement of Bd, consistent with the movement of the blackjack. The movements B and B together form the rolling motion (profiling) of the gear.

After cutting into a part of the allowance, which is cut off in the first pass, the cutting movement of P1 is stopped and during the first rotation of the workpiece 1, the first pass is made

After the end of the first pass, without stopping the rolling motion, the workpiece 1 reports the P1 piercing movement to the next part of the cutting allowance on the second pass, and the dolly 2 reports the angular cutting Bs opposite to the direction of its circular feed. At the same time, the torque developed by cutting force, for example, Px

In FIG. 2, reference numeral 3 shows the allowance cut by a tooth in the first pass. In the second pass, after a radial incision into the corresponding part of the allowance and an angular incision of the opposing circular feed, the allowances 4-6 are cut. To align the allowances 5 and 6, cut in the second pass, respectively, the input and output cutting edges, due to the angular incision, the allowance 6 is increased by reducing the allowance 5 by 7. This redistribution of the allowance ensures the same loading of the side cutting edges along ne (L

WITH

about

N

O1 OJ

i

The same surface and the same working conditions on the rear surfaces.

As the stock penetrates and redistributes, the torque developed by the cutting force, which is the difference in moment acting on both side cutting edges, decreases. When an equal torque value is reached, corresponding to the same total dimensional wear of both side cutting edges, i.e. of equal thickness of allowances 5 and 6, cut off by both edges, the movement of the corner incision is stopped.

After the cutting movements of P1 and Bs are completed, a second pass is made during one rotation of the workpiece 1. Then a third pass is performed similarly, and so on.

Claims (1)

The invention of the method of digging gears in rolling conditions for multi-pass processing, in which, starting with the second of the passage, a uniform distribution of the allowance between the two lateral cutting edges is carried out, together with the groove before performing the next passage simultaneously with the circular feed and the radial Plunging a part of the allowance, the angular penetration in the direction opposite to the circular feed, characterized in that, in order to increase durability, the control of the distribution of the allowance is carried out by difference moments of cutting forces that measure at both edges, and when it reaches zero, stop angular penetration. srigL