SU1252060A2 - Apparatus for working non-round surfaces - Google Patents

Description

The invention relates to machine tools and can be used in the manufacture of surfaces of complex shape, such as cams for wave transmissions.

The purpose of the invention is to increase manufacturing performance and tuning accuracy by supplying the device with an inter-scanning mechanism for adjusting the eccentricity of the eccentric shaft.

The drawing shows the proposed device.

The device for processing non-circular surfaces contains an eccentric shaft 1 mounted in the centers of the machine with an eccentricity, an eccentric sleeve 2 with a gear wheel 3 mounted on the shaft 1 with an eccentricity, case 4 freely mounted on the sleeve 2. The case is connected by gear wheels 5-7 with a gear wheel 8 fixed on the hub 9 with a single-arm lever 10. The gear wheels 7, 8, 3, 5 and 6 each have the same number of teeth. An adjustable double-arm lever 11 is freely mounted on an axis 12 connected to the machine bed. One end of the two shoulders lever 11 interacts with the cam disc 13 mounted on the eccentric shaft 1, and the other with the HELP of the finger 14 with the one-arm lever 10. On the body 4, the cam blank 15 is fixed with eccentricity P relative to the axis of the centers of the machine. The eccentricity vector is equal to the geometric sum of the vectors, and P (1 - ё). The first gear coupling has an outermost outer rim 16 connected to the eccentric shaft 1, for example, by means of a key, an outermost inner rim 17 connected still to the eccentric sleeve 2, two intermediate toothed rims 18 and 19 fixedly interconnected and held in engagement with the rims 16 and 17. The second camshaft coupling has an outermost outer crown 20, fixedly attached to the cam disc 13, an extreme inner outermost crown 21, fixedly fixed to the eccentric shaft 1, two intermediate crowns 22 and 23 which are engaged with in Ropes 20 and 21. Intermediate rims have a different number of teeth.

The device is configured as follows.

0

Installing the desired eccentricity E is achieved by turning the eccentric shaft 1 relative to the eccentric sleeve 2. To turn the eccentric shaft 1 relative to the eccentric sleeve 2 at a predetermined angle oi, you must release the outer outer crown 16 and intermediate rims 18 and 19 of the first clutch to the specified angle oi, turn the outermost outer crown 16 with the eccentric shaft 1 in one direction with the required number of teeth, and the rims 18 and 19 in the other direction

5 on the same number of teeth, after which the toothed crowns are engaged and secured with a nut. When rotating the rims 16, 18, and 19 by one tooth in the corresponding directions, the angle of rotation of the eccentric shaft 1 relative to the eccentric sleeve 2 is equal to

360 360 °

where Z |, and Z, j are numbers

 7

16 and 17. The required number of angular steps for which the crown 16 and intermediate rims 18 and 19 are rotated is equal. To turn the disc cam 13 relative to the eccentric shaft 1, the specified angle must be relieved with a nut on the outer outer rim 20 connected to the cam disc to intermediate rims. 22 and 23 of the second clutch, remove the rims from the engagement, turn the outer outer crown 20 together with the cam disc 13 in one direction for the required number of teeth, and the rims 22 and 23 in the other direction for the same number of teeth. Then enter the gear rims and fasten with a nut. When turning the crowns 20, 22 and 23 on one tooth in the appropriate direction, the angle of rotation of the disk Cam 13 relative to the eccentric shaft

R .,.

teeth

17

crowns

five

0

five

0

five

I

 go

360 ° 360 equals where

go g and Z - the number of teeth of the crowns 20 and 21,

and the required number of angular steps to rotate the rims is If / -;).

Such movement of the rims 16-23 allows the B1) to complete the setting of the required eccentricity and mutual position of the direction of eccentricity E and the initial radius vector of the cam disc with a small amount of time and high accuracy without repeated assembly and disassembly of the device and without the use of devices to control angles and sizes.

The use of the proposed device for the fabrication of non-circular surfaces provides a substantial increase in productivity. The process of making a batch of cams in an amount of ten pieces using a known device involves setting up and processing the cams. The adjustment is carried out once before the first cam is fabricated using a setup that includes length gauges to control the size of the radius vector and an optical dividing head for measuring angles.

The following operations are performed during adjustment: preassembly of the assembly eccentric shaft 1 - eccentric sleeve 2 (a); fixing this node on the installation to control the size and angles (b); preliminary control of the total eccentric value. Editor N. Bobkova

Order 4567/13 Circulation 1001Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Design,

test on the difference of the length gauge readings and comparison of the value of eccentricity with the required value (c); Removing the assembly shaft 1 - sleeve 2, disassembly and subsequent rotation of the shaft relative to the sleeve and reassembly (g); performing operations b, c, d until the required eccentricity is established with an accuracy of +0.002 μm (d); presetting the relative position of the eccentricity directions e and the initial engagement of the radius vector value of the cam disc 13 (e); measurement of the angle determining the mutual position of the eccentricity e and the initial radius vector (g); turning and fixing the disk cam 13 on the eccentric bushing (h) and performing operations g, g until the required angle between the directions and the initial radius vector (s) is established.

Compiled by G. Barinov

Tehred O. Sopko Proofreader V. But ha

Claims (1)

DEVICE FOR PROCESSING ROUND SURFACES by ed. St. Ν '677817, characterized in that in order to increase productivity and tuning accuracy, it is equipped with an eccentric shaft eccentricity adjustment mechanism made in the form of two gear couplings, each of which has four gear rims, with the outermost rim of the first coupling and the outermost rim the second clutch is connected to the eccentric shaft, the outermost rim of the first clutch is connected to the eccentric sleeve inserted into the device, the outermost rim of the second clutch is connected to the cam disc, and the exact crowns of each coupling have a different number of teeth. * 1252060