SU599983A1 - Cutting tool - Google Patents

Description

one

This invention relates to a hard-cutting cutting tool for cutting rocks and building materials.

A cutting tool is known, comprising a housing with a gradually decreasing height thereof and equally high teeth 1.

However, this tool is intended for cutting mountainous grains of lower accuracy.

A cutting tool is also known, comprising a housing with a section having unevenly high teeth with their gradually increasing height, and a section with a equally high and teeth .2.

In such a tool design, the specific pressure in the cutting zone is insufficient, low productivity, high energy costs, poor working conditions, rapid tool wear, and the purity of the treated material surface is unsatisfactory.

The aim of the invention is to reduce the anergy cost of cutting and ensure a smooth cutting surface.

This goal is achieved by the fact that the tool is equipped with a diamond-bearing clove installed behind a section with equally high teeth and made with a height and width equal to the tooth adjacent to it, and the height of each of the equally high teeth is equal to the height difference of the first and last of uneven teeth, and the length of the section with uneven teeth 10-11 times the length of the section with equally high teeth, and thickness of uneven teeth less than the thickness of equally high ones 0.5-0.85 times.

In addition, iB tool width of each successive equally tall cloves may be greater than the previous cloves by

9

“2

where 62 is the width of unequal teeth;

bz - the width of the last is equal

cloves; P2 - the number of equally high teeth.

FIG. 1 shows a diagram of the cutting tool in operation; in fig. 2 is a diagram of the cutting tool, bottom view; in fig. 3 is a diagram of the cutting tool when mounted on its case teeth, having only lateral cutting edges of different width, bottom view; in fig. 4 given a saw with an equal width of teeth, having only lateral cutting edges, side view; in fig. 5-saw with a different width of teeth, having only side cutting edges, side view.

On the body 1 of the tool, narrow teeth 2 are initially installed, having peripheral

3 and side 4 | cutting CROM | KI. The width of the teeth 2 is determined by the ratio

3 ,, (0,5-0,85) 8,

where 5 is the case thickness: tools.

The thickness of the body 5 at the place of installation of the teeth 2 is determined by the cutting forces arising during sawing up of the mountain type, as well as by the strength properties of the metal of which the body is made, and is equal to

8, (0.4 - 0.75) 8.

The magnitude of the excess of the subsequent chuck over the previous one is determined by the outcome of the physicomechanical harvesting of the sawn rock.

For the teeth 2 of the la body 1, the teeth 6 are installed, having only lateral cutting edges 7 parallel to the plane of the web. The height of the side edges of the ravi

I, I, - JN,

where HZ is the distance from the top point of the first tooth to the peripheral surface (bottom point) of the last narrow tooth 2;

AJ is the value that “each subsequent narrow tooth exceeds the previous one in height;

Jaz - height zubkov having only side cutting edges.

In this case, the peripheral surfaces of the 8 teeth 6 are at the same height as the periphery of the cutting edge 4 of the last but one narrow tooth 2.

The peripheral surfaces of the 8 tooth owl 6 do not have a pointed peripheral cutting KjpOMKH. The width of these teeth is chosen as low as possible. Ensuring the passage of the tool body in the kerf is without rubbing, i.e. determined from the above condition.

The thickness of the tool body 1 is determined by the cutting forces that occur during stone cutting, the strength of the saw blade and other parameters.

A diamond bar 9 with grains up to 630 microns, which is equal to I in height (Fig. 1), is located behind tBe) rhodoplavnyh teeth (fig. 1), and the periphery and cutting surface 10 is at the same height as the peripheral surface of 8 teeth 6, orientally, their thickness is equal.

The ratio of the length of the body section on which the teeth are placed in excess of 1 and the length of the body part with teeth located at the same height / 2 is determined by the ratio

/

-10 ± 1.

The second variant of the tool design is characterized in that the teeth b, located on the body section of length / g, have a different width, and the width of each subsequent tooth is wider than the previous one by the amount defined by the formula;

 3D5

“2

(“2 depends on the width of narrow teeth and the strength of the stone being processed).

The tool is operated when it moves in the direction of elevation of the steps of the teeth 2 in height (in the opposite direction - idling) with the preliminary stone feed OR tool by the value I.

At first, narrow teeth 2 come into operation, which go deep into the stone as they enter, iB is cut through. Then the wide teeth 6 come into operation, which widen the gap, cut by the teeth 2 "and a depth equal to (I-DY). In this case, only the side cutting edges 7 of the teeth 6 work. Since the peripheral surfaces 8 are located higher than the peripheral cutting edges 3 of the last narrow teeth 2 by the value of AP, the cross-section after the passage of the teeth 2 and 6 takes the form of teeth, shown in FIG. 4 and 5.

After expansion of the cut with teeth 2, the diamond-bearing bar 9 comes into operation, which removes the macronerity generated by the expansion of the cut with teeth 6. At the same time, the diamond bar protects the surface of the cut and prevents the blade from vibrating during cutting (cleaning), i.e. damping element.

When re-cutting, the first narrow tooth 2 enters the kerf (slot), cut by the last narrow tooth 2, which in this case plays the role of a guide when sawing, and thus prevents the tool from moving to the side and bending the kerf.

The operation of the tool having wide teeth 6 of different width is as follows.

At first, narrow teeth 2, installed with excess, work into the work, then wide teeth 6 come into operation, each subsequent one expands the cut by an amount determined by the formula

DZ, i.

“2

when sawing natural stone - tuff, of the limestone, shell rock, travertine, marble and other, the proposed tool productivity is 3-5 times higher than the traditional tool.

Claims (2)

Sawing up of rocks by the proposed tool is the most economical in comparison with the existing known methods, which ensure the reduction of the cost of finished products, by 1.5-2 times. At the same time, the annual economic effect from the introduction of this tool on one machine will be 10-25 thousand rubles. Formula of the invention. 1. A cutting tool comprising a body with a section having unevenly high teeth with gradually increasing height and a section with equally high teeth, characterized in that, with the aim of reducing the energy, (at the cost of cutting 1 and ensuring a smooth cutting surface, the tool is equipped with a diamondiferous tooth set behind a 10 section with equally high teeth made with a height and width equal to the tooth next to it, and the height of each of the equal teeth is equal to the difference between the heights of the first and the last 15 high teeth, and the length of the section with uneven teeth is 10-iM times longer than the section with 1 high teeth and the thickness of uneven teeth is less than the thickness of equally high B 0.5-0.85 times.20 2. Tool, floor, about tl and h and y and so that the width of each successive equally tall teeth is greater than the width of the previous one by the amount where b2 is the width of unevenly high teeth, bz is the width of the last equally high teeth, “2 is the number of equally high teeth. Sources of information taken into account lrn examination 1. USSR author's certificate №88762, cl. In 28d 1/12, 1949. 2. US Patent No. 3005478, cl. 143-133, published. 96; 1.