SU1391889A1 - Cutter head - Google Patents

Abstract

The invention relates to cutting tools for cylindering and debarking logs. The cutting head contains a holder 2 placed in a housing 1 made in the form of a split sleeve 4. On the holder by means of a stop head 5 and a sealing washer 6 an annular cutter 3 is mounted, the inner annular protrusion 9 of which contacts the head 5 and the washer 6 by means of balls 10. Holder with an annular cutter mounted on the housing 1 with a nut 8. The cutting head (or several) is mounted on the drum 12. To exit the chips 17 in the drum 12 there is a groove 13, and the end of the stop head is made with a concave surface 11 for a smooth the course of shavings. By placing the incisal head under the angle / 3 with respect to the groove 13, the head achieves self-rotation when the drum rotates 12 ". In this case, a layer of wood is cut off by one of the cutting edges of the annular cutter. When replacing the cutting edge, the annular cutter is pulled out through the groove of the split sleeve 4 and turned over 180. By simplifying assembly and disassembly, productivity is improved. 3 ill., 1 3.p. f-ly. i (L s

Description

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The invention relates to cutting tools for machine tools for cylindering and debarking logs and can be used in forestry and woodworking.

The aim of the invention is to increase productivity by simplifying assembly.

Fig, 1 shows a cutting head, a longitudinal section; fig 2 is the same top view; FIG. 3 is a section A-A in FIG.

The cutting head includes a housing 1, in which a ring cutter 3 with a double-sided cutting edge is fixed by means of a holder 2. The housing 1 is made in the form of a split sleeve 4, and the holder 2 is placed inside the sleeve coaxially with it and an annular cutter 3 and has a stop head 5 on one side and a sealing washer 6 for connection with an annular cutter, and on the other hand a thread 7 for a nut 8 "The annular cutter 3 has an annular protrusion 9 on the inner surface, which is located between the contact head 5 and the sealing washer 6 and contacts them between Your ball bearings in the form of balls 10 The end of the support head 5 is made with a concave surface. The cutting head (or several pieces at a time) is mounted on a conical drum 12, and an inclined groove 135 is located - :) THAT at an angle of 0.20 ° to the plane of rotation of the drum 12 (angle сО and at an angle of 0.0.30 to the tangential circumference of the drum (angle f5). On the case 1 of the cutter head there are depressions 14 and 15 along the ends and a longitudinal groove 16 of width corresponding to the transverse dimensions of the holder. The concave surface 11 of the head 5 ensures a smooth convergence uzhki 17, withdrawn from the timber 18.

The cutting head works as follows.

When the drum 12 rotates at a linear speed V, the cutter 2 removes the chips 17, which, by bending the internal cavity of the cutter and the head 5, extends through the inclined groove-13 beyond the limits of the cutting and drum. The thickness of the cutting chips is established by the angle 3. Under this angle a groove is made by milling the drum 12 body. As a result of this angle, asymmetry is formed

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Some of the cutting forces and the cutter self-rotate with respect to the balls 10. In this case, the sliding slip and chips on the cutter transforms into rolling friction and the cutting force decreases to 30 ... 40%. Permanent change of new sections, annular cutting edge increases the service life of the tool. After

10 the bluntness of the cutting edge of the nut 8 is weakened by an amount sufficient to exit the ends of the sealing washer 6 and the end washer 19 from the recesses 4 and 15 of the housing 1. Thereafter

15, the annular cutter 3 through the groove 16 is removed from the housing. Then the nuts 8 are reversed, the washers 6 and 19 are removed, the balls 10 are taken out. After cleaning and turning the tool through 180, the assembly is reversed in the reverse order. In the assembly, the holder 2 is placed vertically with the head 5 downwards, the balls 10 of the first p da5 are placed, then the cutter is put on and the balls of the second row are placed. After the washer 6 is put on, a lubricant is put in and the assembled annular cutter is inserted into the housing 1 and the nuts 8 are tightened. The number of incisal heads is determined by the requirements of the technology, they can be installed on the drum in various orders. With a minor reconstruction or other design, the tool head can

25 be used for barking logs. The length of the cutting head does not exceed three times the length of the cutter, which makes it possible to manufacture instrumental drums to existing rotary machines without

40 significant alterations of the latter.

Due to the simplicity of the assembly of the cutting head, when the annular cutter is rotated through 180 °, an increase in productivity E5 is achieved.

Claims (1)

Invention Formula  . A cutter head containing g (a body in which a ring cutter with a double-sided cutting edge is fixed by means of a holder, is characterized in that, in order to increase the productivity of J2 by simplifying the assembly, the housing is shaped as a split sleeve, and the holder placed inside the sleeve coaxially with it and the annular cutter and has on one side a thrust head and a sealing washer for connection with an annular cutter, and on the other, a thread for a nut, while the cutter has an annular protrusion on the inner surface that is located between the thrust head and the sealing washer and contacts the ball bearing means, 2, The head of claim 1, wherein the end of the head is made with a concave shape.