PL189990B1 - Cutting tool in particular that for woodworking machines - Google Patents

Abstract

1. A machining device, especially for mechanical wood working. It has the form of a head or shaft with longitudinal slits on its surface, which accommodate machining cutters fixed with mechanical clamps. It is characterised in that the length of machining cutters (3) corresponds to the width of the body (1) of the machining device. The cutting blades (4) are formed by cuts (5) made at desired distances. The machining cutters (3) are secured in the slits (2) of the body (1), so that the cutting blades (4) of particular machining cutters (3) are shifted with respect to each other.

Description

The invention relates to a cutting tool, in particular for machine processing of wood in the shape of a head or shaft with cutting knives fixed by mechanical clamping means.

Cutting tools are known in the form of heads or shafts with journals on the surface of which cuts are made along the helix. In these cutouts, radially flat cutting knives with holes are placed, attached to the side walls of the cutouts with screws.

There are also known heads or cutter shafts on the surface of which there are longitudinal cuts with a rectangular or trapezoidal cross-section, in which individual cutting knives are placed along a helical line, each knife being mounted separately by means of a pressure insert usually of a trapezoidal cross-section and a screw located in the channel of the head or shaft.

The cutting tool according to the invention in the form of a head or a shaft on the surface of which there are longitudinal channels for cutting knives mounted by means of mechanical clamping means, characterized in that the cutting knives with a length corresponding to the width of the cutting tool body have cutting blades resulting from cuts with predetermined distances . The cutting knives are embedded in the channels of the body so that the cutting blades of the individual cutting knives are shifted relative to each other.

In a variant of the invention, the cutting knives are embedded in the channels of the body so that the cutting blades create a helix on the surface of the cutting tool, the pitch of which depends on the distance between the cutting blades.

The cutting tool in question is characterized by relatively low production costs, low cutting resistance and quiet operation. It is possible to manufacture knife heads and shafts of any length and diameter, including channels for cutting knives, using traditional machines such as milling machines and lathes. You can use cutting knives with different cuts, which allows you to obtain a helical line of cutting blades with any pitch, thanks to which there is no phenomenon of tearing out the fibers of the processed material, including working in the opposite direction to the grain. Sharpening and setting the cutting knives is done in the same way as in traditional tools, and there is also the possibility of multiple knife sharpening. The perfect setting of the knives can be obtained by very gently grinding the blades with a grinder on the shaft, which further extends the working time of the tool until the next sharpening.

The subject of the invention in an exemplary embodiment is shown in the drawing, in which fig. 1 shows a cutting tool in the form of a shaft in a front view, fig. 2 - a cutting tool in a cross-section along the line AA in fig. 1, fig. 3 - a knife cuts 189 990 front view, fig. 4 - cutting knife in side view, fig. 5 - cutting knife in top view.

The cutting tool according to the invention has a body 1 on the surface of which six channels radially spaced around the perimeter are made along the axis 2. In the channels 2 cutting knives 3 with cutting blades 4 and notches 5 are mounted. The body 1 has a milling 9, channels 10 and threaded holes 11. The cutting knives 3 are screwed with pressure bars 7 and pressure screws 12, the ends of which 13 enter the recesses 8 made along the entire length of the clamping bars 7. The lower surfaces 6 notches 5 in the cutting knives 3 are below the upper surface of the pressure bar 7. The angle of the sides of the cutting blade in the vertical plane is most preferably from 5 ° to 10 °. The cutting knives 3 have a length corresponding to the width of the body 1 and have cutting blades 4 resulting from cuts 5 of predetermined distances, while the cutting knives 3 are embedded in the channels 2 of the body 1 so that the cutting blades 4 of the individual cutting knives 3 are shifted relative to each other.

In a variant of the invention, the cutting knives 3 are embedded in the channels 2 of the body 1 so that the cutting blades 4 form a helix 14 on the surface of the cutting tool, the pitch of which depends on the distance between the cutting blades 4.

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Fig. 5

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Publishing Department of the UP RP. Circulation of 50 copies. Price PLN 2.00.

Claims (2)

Patent claims 1. A cutting tool, especially for machine processing of wood in the form of a head or a shaft on the surface, which has longitudinal channels for cutting knives fixed by mechanical clamping means, characterized in that the cutting knives (3) have a length corresponding to the width of the body (1) cutting tools have cutting blades (4) made as a result of cuts (5) with predetermined distances, while the cutting knives (3) are embedded in the channels (2) of the body (1) so that the cutting blades (4) of the individual cutting knives (3) ) were shifted in relation to each other. 2. The cutting tool according to claim A method according to claim 1, characterized in that the cutting knives (3) are embedded in the channels (2) of the body (1) so that the cutting blades (4) form a helix (14) on the surface of the cutting tool, the pitch of which depends on the distance between the cutting blades ( 4).