SU97454A1 - Gear hobbing machine for cutting non-circular wheels with convex centroids - Google Patents

Description

Gear milling machines are known for cutting non-circular wheels with convex centroids with two flat-cam mechanisms, of which one imparts uneven rotation to the workpiece and the second non-uniform translational movement. In such gear milling machines for cutting non-circular splint wheels, uneven rotation of the table carrying the wheel to be cut is obtained either by a reference gear wheel or by a differential driven by uneven rotations from the cam mechanism. The disadvantage of the first type of table drive is the difficulty of making interchangeable reference gears, the disadvantage of the second and the need to obtain a backlash-free gear in the differential.

In the described machine, these shortcomings are related to those. that uniform and uneven rotation is summed directly on the table carrying the wheel being cut, and to create uneven rotation a cam mechanism is used with a synchronous closure of the pusher connected by means of a belt breaker with a table carrying the workpiece.

FIG. 1 shows a schematic stanotoc; in fig. 2 Irivod of non-uniform linear table, machine table.

Cutting a non-circular gear / produced by a worm milling cutter 2. Rotation of the table carrying the wheel to be cut is communicated by a dividing worm pair 3. The fist 4 of uneven rotation is located coaxially with the worm gear: The pusher 6 of the cam 4 is made in the form of a frame, the 7 of which are involved in a portable rotational movement together with a separating worm wheel. The radial movements of the pusher 6 are transformed into turns of the upper table 8 by means of a belt breaker 5. The force closure of the pushers 6

No. 97454 on the fist 4 all-round springs / O, creating through the system of levers on the top table 5th cool moment, which is converted by the belt-breaker mechanism 9 into a standing fronts. The force of pressing the roller pusher 6 to the fist 4.

When vrantsennn divider; : the screw-nut 5, the pusher 6 participates in two movements: rotation with the screw-wheel and radial failure; epI; og: ostung: tsl; C) m per: si: e; 1nn disagree; 1 bottom of the table. The last movement is transformed by a tape-wrap mechanism 9 into non-uniform underspring: a table 5 carrying a wheel. The uniform bushing of the pusher 6 is transmitted by the tension steel tape. The roller mechanism 9 to the upper table 8 is unchanged. Thus, on the upper table 8, two rotations are summed up: uniform and non-uniform, resulting in the necessary heterobiomeric rotation.

The radial non-movement of the table sled 5 is carried out by a linear fist, which lies in synchronism with the separating worm wheel. The force closure of the knuckle // to the fixed stop 12 occurs due to the spring: in 13, acting through the system of blocks 14 and the cables 15 on the eye of the table 5. The position of the stop 12 can be adjusted by means of a bit / 5 to obtain the desired depth of cut.

In order to unload cases, the body of the worm pair from the efforts of the line} first iremen1, aenii nkchvod fist linear displacements can be performed separately. In this case, the rotation from the main dividing worm bunk 3 overeats through gear / 7 to an additional worm pair 18. The gear ratios of worm pairs 3 and 18 and gear 17 should be chosen so that the wheels of worm pairs 3 and 18 rotate synchronously. On a single axis with a worm wheel of a pair of 18, there is a ku.chak of linear trans: 1 slits, which through a roller stop 19 moves the slide of the table 5.

Subject invention

Claims (2)

1. Hobbing machine for cutting non-circular grooves with convex centroidal and with n; 1: oculach: zymi me: x: anismas and, one of which tells the workpiece uneven rotation, and the second non-uniform translational movement a uniform rotational movement with an uneven rotation of the cm of the upper table, a fist of uneven rotation mounted on the table and made stationary relative to the sled of the table, and grip; A pusher which is modifying with it, is placed in the guides of the NC / snow table, connected by means of a belt breaker; with ECU: the workpiece is the upper table. 2. Zzbofre-grny machine tool according to claim 1, characterized in that, in order to unload :: the main separator pair of the table, the flat knuckle of linear reA; still receives rotation from a separate drive operating with the main separating wheel.