SU123023A1 - The method of processing the sharp edges of the gears and the machine for implementing this method - Google Patents

Description

The peculiarity of the proposed cutting of sharp edges and the ends of the teeth of cylindrical gears is that these KpOiMOK are processed by one or two breaking wheels that have spiral cutting on the end surfaces of the teeth, and along their edges are the corresponding bevels that, when axially fed, the wheels are in contact with the edges of the machined wheel teeth.

This method improves the quality of processing and increases productivity.

When machining wheels with a small number of teeth, a wheel with teeth corrected by Hiary and the gearing angle is used as one of the breaking wheels.

To implement the described method, a machine is offered which is designed as a fixed box carrying a spindle for setting the wheel to be machined, a press wheel for removing burrs and a gear drive. This drive is designed to drive the rotation of two spring-loaded spindles, installed in parallel in the movable box and carrying rollers fixed at their ends.

FIG. 1 shows the arrangement of a gear between two grinding wheels; in fig. 2 and 3, respectively, cross-sectional views of the running wheels are shown in aa, bb in FIG. one; in fig. 4 is a cross-section of the machined wheel in terms of in-bc in FIG. one; in fig. 5 is a longitudinal section of the machine; in fig. 6 is a view of the machine along arrow A; in fig. 7 is a section along BB in FIG. 6; in fig. 8 - view along arrow B.

No. 123023-2 -

The sharp edges at the ends of the teeth of the cylindrical wheel / (Fig. 1) are machined by rolling tracks and 3. The rolling wheel 2 (starting circle 4) has all the elements of a normal uncorrected gear. Wheel 3 (starting circle 5) is corrected by the pitch and angle of the gear. Wheel 3 is used when machining gears with a small number of teeth, as well as with a small number of teeth of the wheel 2. If the number of teeth of wheel 2 and the number of teeth of the wheel to be machined 1 provide sufficient engagement, then processing can only be done by wheel 2.

The cutting edges on the chamfers of the running wheels can be formed by spiral cutting (Fig. 2) and sharpening the chamfers (Fig. 3). The run-in is carried out with rotation and axial pressure of the grinding wheels 2 and 5 on the gear wheel 1 being machined under the conditions of their proper engagement, which is ensured by the forced drive of the rotation of both the wheel and the wheels being cut.

The edge view after the end of the wheel treatment / is shown in FIG. four.

The machine for carrying out the proposed method consists of fixed and movable boxes 6 and 7 (Fig. 5). Box 6 houses a working spindle 8, in which the machined wheel 9 and the roller 10 with a priming wheel // are installed and centered to remove burrs. The front wheel 11 is mounted on an eccentric bushing 12. At the bottom of the box 6 there is a roller 13 with gears 14 and 15, two shafts with gears 16 and 17 (Fig. 7), couplings 18 - l 19 - l transfer shafts 20 and 21 In the box 7, spindles 22 (Fig. 5) are installed, under the influence of springs 23, and carrying wheel rollers 24 and 25 (Fig. 8) and gear 26. In the box 7 there are two drive shafts 27 with transmission gears 28, and also a hollow shaft 29 for centering and supporting the machined wheel 9.

When machining, the wheel 9 is installed in the centering nib of the clamping rod 8. Then the box 7 approaches the box 6, and under the influence of the springs 23, the processed and rolling wheels directly grip. The burr is removed by the wheel // driven by the lever 30 (Fig. 6). When machining gears of the same type, the distance between the machined and prikatochny wheels, as well as between the axles of the shafts of the break-in wheels is constant. In universal machines, these distances must be adjustable.

Subject invention

Claims (3)

1. A method of treating sharp edges at the ends of the teeth of cylindrical gears, characterized in that, in order to improve the quality of processing and increase productivity, the edges are machined with one or two breaking wheels that have cutting on the end surfaces of the teeth, and cutting along the edges - the corresponding bevels in contact with the axial lodche of these wheels with the edges of the teeth of the wheel to be machined. 2. A method according to claim 1, characterized in that, in order to process wheels with a small number of teeth, one of the rolling wheels is used with normal wheels and the other with corrected gears and hook gears. 3. Machine for implementing the method according to claims. 1, and 2, characterized in that the frame is made in the form of a fixed box, which carries a shpindle for mounting the wheel to be machined, a paddle wheel for removing burrs, and a gearshift drive designed for bringing in rotation two spring-loaded spindles installed in parallel in the movable box and carrying wheel wheels secured at their ends. Priority on PP. 1 and 2 of the subject matter of the invention - July 28, 1958 and according to Clause 3 - August 11, 1958 0 i2 j-Tbz ;. Y Y A 2S 22 Type D -sixteen