SU478723A1 - Diskovaya machine - Google Patents

Description

one

The invention can be used in the pulp and paper industry for the production of process chips.

Known disk chipper machine, including the working body in the form of a disk with chippers.

The purpose of the invention is to reduce the loss of wood during logging, to improve the quality of the chips produced and to ensure the steady movement of wood during the cutting process and its uniform movement under the blades of the disk.

This is achieved by the fact that the cutting edges of the chippers are made in a curve, the equation of which in polar coordinates is determined by the ratio

- /(-)-about

F

arccos

full angle:

the initial radius of the curve; polar radius.

V

Go

the rate of penetration of the knife into the wood;

angular velocity of rotation of the disk, and the rear edge of the knife is formed by a set of screw lines with

by the same screw pitch passing through the cutting edge. FIG. 1 shows the proposed chipping machine, the cut; in fig. 2 shows a chipper disc with knives.

The chipper mask consists of a flat disk 1 with knives 2 held by bolts 3. A feed cartridge 4 is mounted on the front side of the disk in which the log 5 is located. In addition, there are slots 6 in the disk for the chip 7 to exit. The machine works as follows. Wood 5 in cartridge 4 comes under knife 2 of disk 1. Because the cutting edge of knife 2 is made in a curve, the equation in polar coordinates is determined by the ratio

 1 (t -) - arccos

Go

The knife is inserted into the wood at a constant speed equal to the peripheral speed of the blade of the knife at the disk shaft.

The cut end of the wood 5 continuously slides over the back face of the knife 2 having a helical surface. This enables the wood to move under the blades of the disk at a constant speed under the action of the force of gravity and the pulling force.

Chips 7 through the slots 6 in the disk I are evacuated from the cutting area.

The proposed shape of the cutting edge of the knife allows, at a constant disc rotation speed, a constant penetration rate of the knife into the wood, equal to the circumferential speed, which is 8–10 m / sec for sealed larch wood. Wood losses at this rate are reduced to 3.8%, and the yield of standard grade 1 chips reaches 70%.

Subject invention

Claims (2)

1. A disc chipper mask, including a working body in the form of a disc with chippers, characterized in that, in order to reduce wood losses during logging and to improve the quality of the chips, the cutting edges of chippers knives are made according to a curve, which equation in polar coordinates by attitude - /( )-about F arccos where: Ф - polar angle; Go - the initial radius of the curve; d is the polar radius; V Go with where: V is the rate of penetration of the knife into the wood, (O is the angular velocity of rotation of the disk. 2. The machine according to claim 1, characterized in that, in order to ensure the steady movement of the wood during the cutting process and to evenly move it under the knives of the disc, the rear edge of the knife is formed by a combination screw lines with the same screw pitch, passing through the cutting edge.