SU1220743A1 - Grinding device - Google Patents

Description

one

The invention relates to woodworking and relates to the construction of grinding devices that can be used to grind both block slabs from solid wood or glued from veneer and metal parts.

The aim of the invention is to improve processing performance by ensuring the replacement of worn areas of the belts during operation of the device, as well as ensuring the removal of worn ends of the belts and eliminating spontaneous feeding of the belts from the grinding force.

Fig. 1 shows the grinding device J in fig. 2 shows section A-A in FIG. 1 (top view of the device).

The device consists of a drum 1 mounted on a spindle 2. The drum is made in the form of a body 3 with sh; e- left grooves on the periphery for accommodating abrasive belts 4 and a hub 5 with slots 6 for securing and winding abrasive belts using clamps 7.

The slit grooves between the walls of the housing have feed rollers 8 and pressure rollers 9. Rollers 8 are knitted and can be rotated from the disk 10, which are periodically in contact with the brake 11 activated by the pneumatic cylinder 12 comanla from the meter of the ground workpiece being ground.

The feed rollers are kinematically connected via a chain drive. At the same time on the rollers 8 are rigidly fixed sprockets 13, connected by a roller-sleeve chain

14, taut with an asterisk

15, which houses a brake, made in the form of a friction disc 1 6 and a spring washer 17, with which it is possible to create a braking system that prevents spontaneous pulling of the belts 4

from the case of grinding effort. The rollers 9 can rotate freely on the axles 18 inserted into the hinged earrings 19. The rollers 9 press the ribbons against the rollers 8 due to centrifugal force.

The reloading of the drum with abrasive belts is carried out outside the device in this sequence.

Remove the drum housing cover 20, remove the ends of the spent

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tapes are inserted into the slots of the hub 5 ends of the new tapes, passing them through the slot grooves between the rollers 8 and 9.

Then, using a fork with a fork-shaped key inserted into the slots of the hub 5, rotate it in the direction of the working rotation of the circle and thereby wind all the belts at the same time on the hub 5 until the working part of the belts of a given length remains outside the drum body.

The cover 20 is applied to the walls of the drum housing 5 and secured with screws.

For the elastic support of the working ends of the tapes, on the walls of the drum casing there are strips 21 s on

glued foam cushions 22 (or with nylon fiber brushes).

For grinding the ends of the belts as they wear out and feed from the casing, the single-tooth cones 23 fixed to the fixed rod and reinforced with plates of hard alloy.

The drum is mounted on the spindle of the device.

The direction of movement of the workpiece 24 and the rotation of the abrasive wheel are determined by the directions of the arrows C and D (Fig. 2).

The grinding of the surface of the part is ensured by alternating contacts of the working ends of the belts with the surface to be grinded in section D (Fig. 2). Elastic contact of the tape with the part and the required specific pressure is ensured by compressing the elastic element 22. When deciphering parts from wood, the plane of rotation of the circle should be at an angle of 10-15 to the direction

the movement of the part, which eliminates the need for oscillation of the circle.

As wear of the working ends of the bands on the pneumatic cylinder 12 brakes

11, a short-time signal is received from the sensor of the pogonage counter of the ground parts, through which the brake 11 momentarily contacts the disk 10, which, turning

around the axis at the minimum angle, feeds through the chain transmission by a specified amount all the belts with the help of rollers 8 and 9.

31220743.

At the same time, the ends of the tape meet After the tapes are completely worn out

with the teeth of the cutters 23, they are ground and the length of the working ends of the grinding belt remains constant.

It is removed from the spindle for recharging, and the other drum, filled with ribbons, is mounted on the spindle.

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Editor N.Gorvat

Compiled by L.Sergeeva Tehred L.Oleinik

Order 1515/9

Circulation 740 Subscription

VNIIPI USSR State Committee

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

Filial PIP Patent, g, Uzhgorod, st. Project, 4

Proofreader A.T. sko

Claims (3)

1. DEVICE FOR GRINDING, on the spindle of which there is a drum with grooves on the periphery intended to accommodate the abrasive Belt, the latter being wound on the hub of the drum, and on its periphery elastic elements fixed with the possibility of contact with the abrasive belts, characterized in that, for the purpose to increase the productivity of processing, it is additionally equipped with motionless sections and brake fixedly mounted relative to the drum on the mechanism, and also located on the drum concentrically to its axis with the possibility of rotation pressure and feed rollers, one of the latter being equipped with a disk rigidly mounted on its axis and with the possibility of contact with the brake, and all the rollers are kinematically connected to each other. 2. The device according to p. 1, characterized in that the cut-off mechanism is made in the form of a set of single-tooth cones. 3. The device according to paragraphs. 1 and 2, characterized in that it is additionally equipped with a brake made in the form of a spring-loaded disc placed in a kinematic chain connecting the rollers. ph. 1>