RU1790501C - Method for production of marble tiles - Google Patents

Abstract

Usage: when processing natural stone, in particular marble, and can be used to obtain tiles. The essence of the invention: the implementation of the method in a forced mode, in particular sawing with a peripheral speed of rotation of the disk of a diamond tool 70-90 m / s, edging 70-80 m / s, grinding and polishing at a speed of rotation of the abrasive tool 2500-3000 rpm . Moreover, the abrasive tool is made on the basis of polyurethane. 1 s.p. fl, 1 tab.

Description

The invention relates to the processing of natural stone, in particular marble, and can be widely used in the manufacture of cladding tiles.

There is a method of sawing blocks of marble with a saw blade into slabs by forming incomplete cuts in them, followed by separation of the slabs from the unprocessed part of the block. At the same time, a flowable material with cementing properties is introduced into the cuts, with respect to marble, followed by sawing of the plates between the cuts, after which the unfinished part of the block is separated, and the boards connected to each other by the specified curable material are separated without cuts .

The disadvantage of this method is the high cost of producing finished products due to expensive liquid resins and low productivity of the main technological limit - sawing.

A known method of manufacturing thin marble slabs is in which thicker plates are cut along one longitudinal edge, and then a second cut is made on the longitudinal opposite edge. Both cutting lines should extend approximately to the longitudinal axis of the thick plate. If the cut lines intersect, a gasket is inserted for the first time, which holds the two plates away from the plate to prevent the saw from jamming during the second cut. If the cut lines do not intersect, then a small longitudinal pillar remains between them, which breaks when the cutting of the cut plate ends.

The disadvantages of the method are low manufacturability, and significant losses as a whole, the high complexity of the method, as well as the complexity of the grinding-polishing processes using cement races C

vi che o el o

with

Tvor, vacuum and mechanical clamps. ....

Closest to the technical essence of the invention is a method of manufacturing marble cladding plates, including sawing a block into blanks in the form of a bar, sawing with a diamond disk, a tool of a bar into plates with subsequent edging, grinding and polishing 3 ..., Gy, „, -,;,.,:.

The disadvantage of this method is its low operability, significant load of the cutting tool on the processed material, leading to technological defects, worsen the operating conditions of the equipment. In addition, grinding with a tool on a hard basis leads to cracking of the plates and does not allow the manufacture of plates with a thickness of less than 10 m.

The aim of the invention is to improve the quality of tiles and reduce the manufacturing capacity.

The goal is achieved in that the sawing of the bar into plates is carried out with a peripheral speed of rotation of the diamond tool disk of 70-90 m / s, edging of the tiles is carried out at a rotational speed of 70-80 m / s, and grinding. and polishing is carried out at a rotational speed of the abrasive tool of 2500-3000 rpm, while the abrasive tool can be made on the basis of polyurethane.

Example 1. First, a block of marble is fed to a frame machine of the СМР-0-32 type, the cutting speed of which is 1.6 m / s, and the feed speed is 100-150 mm / h, in this mode, sawing into blanks in the form of a bar . Then, on a SMP-014 type disk machine, a beam is sawn into 10 mm thick tiles at a peripheral disk rotation speed of 70 m / s. Then the tiles are edged on the СМР-012А machine at a peripheral speed of the working body of 70 m / s, and grinding and polishing on the СМР-030 machine at an abrasive tool rotational speed of 2500 rpm. At the stage of grinding-polishing, a polyurethane-based tool is used, which reduces the thermal effects on the processed material and allows improving the quality of the plates. The output of tiles from 1 m is 28.8 m2.

Example 2. The main conditions for the implementation of the method similar to example 1. At the sawing step of a beam, a 4 mm thick plate is obtained, and the corresponding technological conditions are: for sawing a beam of 90 m / s, for edging tiles 80 m / s, and for polishing

3000 rpm The output of tiles from 1 m is 44.9 m2.

The experimental data are given in the table.

The analysis of the studies shows that by increasing the peripheral speed of the tool, the cutting speed increases, the loads on the equipment and the processed material are reduced

(marble), the operation of diamond discs is stabilized and ultimately the plate yield is increased by reducing the thickness by 2.5-4 times.

The peripheral speed at the sawing step of the beam is optimal with the resulting tile thickness of 10 mm 70 m / s, 4 mm 90 m / s. When speed decreases below 70 m / s, the tile output decreases, the cleanliness of the processed (sawn) surface deteriorates,

sawing performance is reduced.

A peripheral speed increase of over 90 m / s is permissible, but it is limited

the quality of the material from which the blades of diamond discs are made.

At the tile edging stage, work at peripheral speeds of the machine tool working member of 70-80 m / s helps to reduce shock and impact loads. The surface cleanliness and the plane of the edge of the slabs are improved, which allows facing cladding works in construction to be carried out better, the lower limit is similar to the previous operation, and the increase in peripheral speed over 80 m / s is impractical due to the existing manual way of feeding the slabs to the edging.

Grinding and polishing with an elastic polyurethane-based tool eliminates the battle of thin tiles in this operation, helps to increase the life of the tool by 10-12 times, increases the safety of work, increases the productivity of stone processing. The quality of the products is significantly improved, since there are no burns, which often happens when working with the tool on a hard, milky basis, and also there are no chips of the faces of the plates when grinding the peripheral parts.

Grinding and polishing is carried out at a tool rotation speed of 2500-3000 rpm. If the speed decreases below 2500, it is necessary to increase the pressure of pressing the tool against the plate, and therefore, increase the likelihood of cracking of the tiles. When the number of revolutions increases above 3000, the danger of the work of the operating personnel increases due to the possible expansion of the tool segments when separated from the faceplate.

Claims (1)

1. A method of manufacturing marble tiles, comprising sawing a block into blanks in the form of a beam and sawing a beam with a diamond diamond tool into tiles, followed by edging, grinding and polishing the tiles with a rotating abrasive tool, characterized in that that, in order to improve the quality of the tiles and reduce the complexity of manufacturing, sawing the beam into tiles is carried out at a peripheral speed of rotation of the disk of 70-90 m / s, edging is carried out with a peripheral speed of the working body of the machine is 70-80 m / s, and grinding and polishing is performed at a speed of rotation of the abrasive tool 2500-3000 r / min 2, The method according to claim 1, characterized in that it is ground and polished with an abrasive tool made on the basis of polyurethane.