SU75966A1 - Wood saw - Google Patents

Description

The planing saws offered according to the invention are intended to produce boards with planed side surfaces (layers) on the sawmill frame.

On the frame saw blade, which has the usual divorced or flattened teeth, which serve for cutting wood, they additionally assemble (cut or reinforce the plug-in) special cutting knives for planing the planes of the planks that are cut in the frame.

In order to carry out the removal of chips, when cutting planes at two adjacent boards, the cutter knives are beaten to the side alternately: even in one direction and odd in the other. The curvature of the planer blades is taken 0.2-0.6 mm larger than the divorce (or flattening) of the saw cutting teeth.

The number, shape, and size of the knife cutters depend on the technological conditions of sawing, the physical properties of the treated wood, the quality requirements for planing, the method of sharpening knives, the cutting conditions, the size of the saw, and other factors.

FIG. 1 shows a saw with strotochip cutters. On cutting

- A saw blade carrying the normal half wolf (item 1) or parabolic (item 2) teeth, alternating through one normal cutting-out tooth 1, 3, the planing tools 2, 4 are formed.

The formation of planer incisors 2, 4 is carried out in the following sequence: first, the teeth are grinded, then the ends of the blunt teeth are bent to the side (the bend is made alternately one tooth to the right, second to the left, etc.) and, finally, sharpened to form an edge knives-cutters.

The sharpening angle of the planing cutter knives is assumed to be 25-40 °, depending on the technological and physical properties of the planed wood. The sharpening of the cutting teeth of the saw 1, 3, as well as the lateral faces and sinuses of the planing cutters 2, 4, is carried out in the usual way on an automatic machine; Sharpening the blades of the cutter blades is done by hand or on a grinding wheel.

FIG. 2 shows a saw, in which the planing cutters 2, in contrast to the cutting teeth 1, are located on the butt of the blade and have a deep sinus. The sharpening of the blades of the planing cutters is done manually by a file or on the machine,

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no trough sinus incisor; sharpening the sinus-by hand file.

The dignity of planing incisors with a deep sinus arises from the fact that they can be sharpened several times, using a sinus trog (the wear of the blade in this case will not occur along the width, but along the length of the saw).

FIG. Figure 3 shows a combined 9 head frame saw consisting of two narrow saw blades L and B connected along the length of their blades. ; Part 1 of the combined saw is interchangeable and has normal reiss on one edge.

tooth j as well part-standing

part of the saw, having on one edge (front or rear) planing cutters 2. On one saw make two-four or more shtyuks of planing cutters-knives.

The connection of the parts A and the saw is made with the help of the lining 3, the rivets 4 and the screw clamps 5.

FIG. 4 shows a saw with planing cutters 2, notched in the middle of the saw blade.

Two or four planing knives are cut in the lower working part of the saw, approximately in the middle of the webbing spine.

In order to prevent the formation of: cracks in the saw blade in the places of the notches of the planer knife, two holes are drilled in the blade. The notched knife is bent to the side and then sharpened with a file manually.

Subject and d on and e and

Claims (2)

1. A saw for wood, which has, in addition to saw teeth, planed for stripping planes of cutting, so that the cutting edge of planing teeth is projected on the plane of the saw at a negative cutting angle of 15-35 ° relative to saw teeth 2. The form of the saw according to claim 1, characterized in that the planing teeth are located in the middle part of its blade between the butt and the saw teeth. Position 2 I; t-i k About About About About FIG. 3 Position I Position Z - g FIG. four oh oh oh oh oh  WITH  Sj QQ and