SU1237397A1 - Apparatus for lapping planar surfaces - Google Patents

Description

The invention relates to mechanical engineering and can be used for lapping (trimming) flat surfaces of parts, for example sealing surfaces of parts of pipeline fittings (valve spool, gate valve wedge).

The purpose of the invention is to improve processing performance and simplify the design by reducing the preparatory-final time of serviceability.

Figure 1 shows the device, top view; figure 2 - section aa

FIG. FIG.

in fig. one

on on

one; on fig.Z - section BB 1; in fig. 4 - section bb

The device for lapping flat surfaces contains a base 1 on racks, under which the electric drive 2 is located, connected kinematically to disk lap 3 by means of a driving shaft 4 of driven gears 5 and 6 and a driven shaft 7 mounted in a bearing housing 8 connected to base 1. Ba pritire 3 posted 9 cassettes

I.

1 nests in which locate the parts 10. The translational movement of the cassettes 9 relative to the lap 3 is limited to the central roller 1I and the peripheral rollers 12. The peripheral rollers are mounted on the outer ring 13 and connected to it. The ring 13 is installed in the annular groove of the ring support 14 through an antifriction gasket 15 rotatably and form a sliding bearing with them. Between the base I and the ground 3 inside the ring 13 is located the rocker 16, worn loosely on the drive shaft 4 with the possibility of limited rotation relative to it. At one end of the rocker arm, the brake pad I7 is located and connected to it, spring-loaded relative to the base 1 by a spring 18 to the ring 13. The clamping force is adjusted by means of a screw 19. The same end of the rocker arm 16 is provided with a drive of translational movement in the form of hydraulic actuator 20, the stem of which through the block 21 and cable 22 connect to this end of the rocker arm 16. Other

2373972

the end of the rocker arm 16 is equipped with a gear wheel 23 with a friction roller 24. The latter is mounted on the rocker arm with the possibility of a forced friction connection with the inner

the cylindrical surface of the ring 1 3.

The device works as follows.

five

0

five

0

five

0

five

0

five

The parts 10 to be lapped are installed in the slot of the cassettes 9, and then the electric drive 2 is turned on. Rotation from the shaft 4 through gears 5 and 6 is communicated to the disk lapping 3. During the rotation of the lap the cassette 9 is supported by external cylindrical surfaces on the cylindrical surfaces of the central roller 11 and peripheral rollers 12. Under the action of forces resulting from changes in the linear velocities of the surface of the lap 3 from the center to the outer diameter, the vrah cartridge 9 is around its axis, each one; from the loose parts in the slot of the cartridge rotates about its axis. Each point of the lapped surface of the parts carries out a complex, smoothly parallel movement on the surface of the lap 3, which is a necessary condition for high-quality lapping. After installing all the parts 10 in one cassette 9, the operator servicing the device presses the pedal (not shown), the hydraulic actuator 20 through the rod, the cable 22 and the block 21 acts on the end of the rocker arm 16 ,. rotates it relative to the shaft 4, with the result that the brake pad 17 moves away from the ring 13 (from its inner cylindrical surface), and the friction roller 24 presses against this surface of the ring 13. Due to the fact that the gear wheel 23 is in constant engagement with the drive gear 5, as the shaft 4 rotates, the ring 13 is said to rotate through the roller 24, a gear wheel

23 and gear 5. The ring 13 with the rollers 12 rotates, and the cassette 9, having lost its peripheral supports (rollers

12), move together with the rotating ground 3. When the next cassette approaches the loading (unloading) site, the operator lowers the pedal and under the action of the spring 18 the rocker 16 turns on the shaft 4, the roller

24 is removed from ring 13, and brake pad 17 is pressed against it. Kohl 12373974

13 and the cassette 9 stop moving. The eaten-up parts are to be eaten together with the lap 3 in one and the next filling of the cassette slots in the direction of its rotation, g parts for lapping.

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srig.2

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a 75

at

AT 8

18 19

Compiler A.Kozlova Editor V.Kovtun Tehred O.Gortvay Proofreader L.Pilipenko

Order 3235/16 Circulation 740 Subscription

VNIIPI USSR State Committee

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

Production and printing company, Uzhgorod, st. Project, 4

sree

Claims (1)

DEVICE FOR GRINDING FLAT SURFACES, containing a base with a drive mounted on it and a rotating lapping disk, on which cassettes for parts are placed between a central element located coaxially with the disk and peripheral elements mounted on an outer ring mounted on the base rotatably around the axis of the disk characterized in that, in order to increase processing productivity and simplify the design, the device is equipped with mounted between the base and grinding on the drive in Alu with the possibility of rotation relative to it by a rocker with a brake shoe and a friction roller mounted on its opposite ends and designed to contact the inner surface of the ring, while the roller is kinematically connected to the drive shaft, and the brake shoe is connected to the hydraulic drive introduced into the device and by means of a spring - with reason. SU „„ 1237397 A1 Fig 1