SU766773A1 - Machine for cutting non-circular bevel gears - Google Patents

Description

(54) DEVICE FOR CUTTING INNOUNTED CONIC WHEELS

one

The invention relates to mechanical engineering and is intended for cutting non-circular bevel wheels with circular teeth.

A device for cutting teeth of non-circular bevel gears on a hobbing machine is known, which contains a drive, a workhead and kinematic chains connecting them to create a uniform and uneven movement of the cut, wheels and a kinematic chain of uneven movement of the headstock of product 1.

The disadvantage of the device is that, with its help, circular teeth cannot be cut on non-circular bevel wheels.

The purpose of the invention is to expand the technological capabilities of the device by cutting non-circular wheels with circular teeth.

The goal is achieved by the fact that the kinematic chain of uneven movement of the wheels being cut is made in the form of bevel gears, a worm gear and a cam mechanism connected in series with the drive, the output of which is connected with a chain of uniform motion of the wheels being cut.

the chain of uneven movement of the headstock of the product is made in the form of sequentially connected cam mechanism, the cam of which is located on the same shaft with the cam of the chain of uneven movement of the cut wheels, the follow spool, hydraulic motor and tuning guitar, the output of which is connected with the headstock.

The drawing shows the kinematic scheme of the device.

From the general kinematic chain of the machine

, 0 drive 1 horizontal shaft 2 through the wheels 3-6 cylindrical differential, shaft 7, bevel wheels 8 and 9, vertical shaft 10, bevel wheels 11 and 12, shaft 13, bevel gear wheels 14-16, shaft 17, bevel wheels 18 and

5 19, the vertical shaft 20, the wheels of the guitar 21 - 24, the worm to 25, the worm gear 26 is connected to the shaft 27, on which the non-circular bevel wheel 28 is fixed. Shaft 2 through bevel wheels 29 and 30,

Claims (1)

The worm to 31, the worm gear 32 is connected to the cam shaft 33, on which the cams 34 and 35 are fixed. The camshaft 33 is on one side through the cam 34, roller 36, lever 37, roller 38, cylindrical wheel 376 with 39 is connected to the cylindrical wheel 40, which is fixed to the housing of the cylindrical differential. On the other hand, the cam shaft 33 through the cam 35, the rod 41, the follow valve spool 42, the cable 43, the block 44 is connected to the block 45. The follow valve spool 42 through the pipes 46 and 47, the hydraulic motor 48, the cylindrical wheels 49-52, the worm to 53 , a worm wheel 54, cylindrical wheels 55 and 56 are connected to a swivel plate 57, on which the headstock 58 of the product is fixed. The next spool 42 is connected via a cable 59 to a load 60. In the center of the machine, a bevel wheel 61 is fixed, which through a wheel 62, drove 63 is connected to a wheel 15 of a conical differential. The wheel 3-6, the cam shaft 33, the next slide valve 42 are housed in the housing of the swivel plate 57; block 45 is fixed at the center of the machine on the swivel plate 57; the wheel 18 sits on the slider key, and the wheel 56 is mounted on the swivel plate 57; cylindrical wheels 49-52, the worm gear 53 and 54 are housed in the gearbox housing, at the end of which the hydraulic motor 48 is fixed. The gear housing with the hydraulic motor 48 is mounted on the rotary plate 57 from the bottom side. The device works as follows. From the common kinematic chain of the drive machine I rotates a horizontal shaft 2, which through wheels 3-6 of a cylindrical differential, shaft 7, bevel wheels 8 and 9, vertical shaft 10, bevel wheels 11 and 12, shaft 13, wheels 14-16 of a tapered differential, shaft 17, bevel wheels 18 and 19, vertical shaft 20, guitar wheels 21–24, a worm to 25, a worm gear 26, a shaft 27 transmits rotation to a non-circular bevel wheel blank 28. With this chain, the blank billet 28 of a non-circular bevel wheel receives rotation with a uniform angular velocity. On the other hand from the horizontal shaft 2, through the bevel wheels 29 and 30, the worm to 31, the worm wheel 32, the camshaft 33, the cam 34, the roller 36, the lever 37, the roller 38, the wheels 39 and 40, the casing of the cylindrical Differential, wheels 5 and 6, shaft 7, bevel wheels 8 and 9, vertical shaft 10, bevel wheels 11 and 12, wheels 14-16, shaft 17, bevel wheels 18 and 19, vertical shaft 20, guitar wheels 21-24, hearts 25, the worm gear 26, the shaft 27, the rotation is transmitted to the workpiece of a non-circular bevel wheel 28. With this chain, the product receives an additional rotation with uneven angular velocity. Simultaneously, the rotation from the cam shaft 33 is transmitted to the cam 35, which, acting on the wiper 41 of the follow valve 42, turns on the hydraulic motor 48, turning the worm gear 53 and 54, the wheels 55 and 56, the slab 57 with the headstock 58 through wheels 49-52 products around an axis passing through the center of the machine. When turning the headstock 58 of the product, the wheel 11, rolling on the wheel 12, transmits an additional rotation to the blank 28. Compensation of these additional rotations occurs from the bevel wheel 62, which simultaneously with the rotation of the workpiece head 28, runs around the fixed wheel 61 and through the carrier 63, wheels 15 and 16, shaft 17, glasses 18 and 19, vertical shaft 20, guitar wheels 21-24, the worm gear 25 and 26, the shaft 27 transmits to the blank 28 a corrected motion. A feedback connection is provided between the next slide valve 42 and the motor 48, consisting of a cable 43 and blocks 44 and 45. When the headstock is turned .58, the cable 43, winding on the block or unwinding from block 45, moves the body of the next slide valve 42 such in a way that it blocks the flow of oil, forcing the hydraulic motor 48 to work, i.e., places the follow slide valve 42 in the coordinated position. As a drive of the device, a drive from machines for cutting circular teeth of bevel gears with a constant gear ratio can be used. Apparatus of the invention for cutting non-circular bevel gears comprising a drive and a work head, connected by kinematic chains to create uniform and uneven movement of the wheels being cut and a kinematic chain of uneven movement of the headstock of the product, characterized in that, to improve the accuracy of gear processing, the kinematic chain of uneven the movement of the wheels being cut is made in the form of a bevel gear drive, a worm gear and a cam mechanism connected in series with the drive; the stroke of which is associated with a chain of uniform motion of the wheels to be cut, and the kinematic chain of uneven movement of the headstock of the product is designed as a series-connected cam mechanism, the cam of which is located on the same shaft with the cam of the chain of uneven motion, wheels being cut, the follow slide, hydraulic motor and guitar tuning the output of which is associated with the workhead. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 495170, cl. In 23 F 15/02, 19.07.74. ABOUT) . Cj - CJi O h 14. j-4i «i fГ) 5 vT