KR20070102016A - Wire saw bead - Google Patents

Abstract

A wire saw bead is provided to perform cutting process using lower abrasive grains when upper abrasive grains are separated and to easily discharge heat at the time of discharge and cutting of a cutter tip and to improve cutting property by generating natural rotation force and to prevent unbalanced wear by uniformly polishing an outer circumference surface by including grinding abrasives arranged in a layered structure. A wire saw bead(120) provided in plural number on a wire and used for cutting process, which includes a shank(122) having a hollow part inserted into the wire and a threaded bonding surface made of metal and twisted in screw shape, where pitches of the threads are uniformly formed on the entire circumference of the bonding surface, an abrasive grain bonding layer(124) formed in a constant thickness on the bonding surface of the shank, and a plurality of abrasive grains(126) arranged on the abrasive grain bonding layer in correspondence to the bonding surface, where the abrasive grains are combined by electrodepositing or bonding the abrasive grain bonding layer on the bonding surface.

Description

Wire Saw Beads {WIRE SAW BEAD}

1 is a schematic diagram illustrating a wire saw bead according to the prior art and a wire saw comprising the same.

FIG. 2 is an enlarged view of a portion A of FIG. 1; FIG.

3 (a) and 3 (b) are perspective views showing a partially cutaway perspective view and a shank of a wire saw bead according to another embodiment of the prior art.

4 is a perspective view of a wire saw bead according to another embodiment of the prior art.

5 is a perspective view of a wire saw bead according to the present invention.

Figure 6 is a perspective view of the shank of the wire saw beads according to the present invention.

7 is a cross-sectional view of a wire saw bead according to the present invention.

<Explanation of symbols for main parts of the drawings>

120: wire saw beads 122: shank

123: junction surface 123a: acid

123b: valley 124: abrasive grain bonding layer

126: abrasive

The present invention relates to a wire saw bead that is installed in a wire saw and used for cutting, and more particularly, a plurality of abrasive grains are formed in the bead installed in the wire saw and the shape of the product is formed in a screw shape. The present invention relates to a wire saw bead for improving the service life and cutting performance.

In general, a wire saw 1 is used to cut a large workpiece C such as stone or concrete, and the wire saw 1 is a form in which a bead 20 for cutting is coupled to a wire 10. Is provided.

FIG. 1 is a schematic view illustrating a wire saw bead 20 and a wire saw 1 including the same according to the related art, and FIG. 2 is an enlarged view of portion A of FIG.

The wire saw 1 described above is, as shown in Figs. 1 and 2, the wire 10 is rotated and driven across the drive pulley 5, the wire 10 is installed in the stone or concrete A plurality of wire saw beads 20 for substantially cutting the workpiece (C).

In addition, the wire saw bead 20 has a hollow portion inserted into the wire 10, a cylindrical shank 22 made of a metal material, and an abrasive grain layer formed with a predetermined thickness on the surface of the shank 22 ( 24 and a plurality of abrasive grains 26 fixed by the abrasive grain layer 24.

The wire saw beads 20 may be manufactured by sintering heat treatment after the abrasive grains 26 are attached with the abrasive bonding layer 24 applied to the surface of the shank 22, or may be manufactured by a separate segment 23. ), And has a structure coupled to the shank 22.

In addition, the wire saw beads 20 are arranged to have a constant distance with respect to the wire 10, and each wire saw bead 20 to prevent the flow between each other, to maintain a constant between each wire saw bead 20 Between the spacers 15 are made of rubber or synthetic resin.

On the other hand, conventionally, in the process in which the wire saw 1 is used for cutting stone or concrete, the binding force between the segment 23 and the shank 22 decreases due to the large cutting resistance transmitted to the wire saw beads 20. Undesirable flow can occur between them. As a result, the cutting operation of the wire saw 1 is inaccurate, and it is a cause of remarkably reducing the durability and the life of the wire saw 1.

On the other hand, in the case where the abrasive grains 26 are attached to the shank 22 by using the abrasive grain bonding layer 24, the tool life is very short and durability is due to premature wear of the bonding layer and thus early detachment of the abrasive grains 26. There is a problem of deterioration. In addition, the wire saw beads 20 do not have a passage through which the chips of the cutting material are discharged, and thus the cutting efficiency of the cutting chips decreases, and heat is not easily released during cutting of the cutting material.

In order to solve this problem, the wire saw beads 50 and 60 form protrusions and recessed areas formed by a plurality of stepped portions or grooves on the surfaces of the shanks 52 and 62, as shown in FIGS. 3 and 4. In addition, although the wire saw beads 20 in which the abrasive grains 56 and 66 are bonded to have a layer by the abrasive bonding layers 54 and 64 have been proposed, they have not yet completely solved the conventional problems, and thus the cutting performance and durability Efforts have been made to improve heat dissipation effects.

As an example, the conventional wire saw 1 twists the wire 10 in advance and further combines the wire saw beads 20 in order to further improve the cutting force, and thus, the wire in the cutting process of the wire saw 1 The rotational force is generated in the saw beads 20.

However, in the conventional wire saw 1, the wire 10 is tensioned in advance as the wire 10 is twisted in advance, which causes the wire 10 to break when used for a long time, and thus a risk of a safety accident. There is this. In addition, the conventional wire saw 1 has to be twisted wire 10 in advance, the operation is inconvenient, and there is a problem that uneven wear occurs as a constant rotational force is not transmitted to the wire saw beads (20).

The present invention has been made to solve the above-mentioned problems of the prior art, and since the abrasive grains 26 which are substantially cut are arranged to be layered on each other, the abrasive grains 26 of the lower portion 26 when the upper abrasive grains 26 are separated from each other. It is possible to cut by cutting, to release the cutting tip and to easily discharge heat generated during cutting, and to improve the cutting performance by generating a natural rotational force during cutting, the outer peripheral surface is uniformly worn by the rotation It is to provide a wire saw bead 20 that is prevented to wear.

In order to achieve the object of the present invention described above, the wire saw beads according to the present invention are provided in a plurality of wire saw beads used for cutting, the hollow portion is inserted into the wire is formed, the metal material A shank is formed on the outer circumferential surface and has a joining surface forming a valley with a valley, and the shank is formed with a constant pitch on the front circumference of the joining surface, and an abrasive grain formed with a constant thickness on the joining surface of the shank. And a plurality of abrasive grains arranged in the abrasive grain bonding layer corresponding to the bonding surface, and bonding the abrasive grains by electrodepositing or fusion bonding the abrasive grain layer on a surface of the bonding surface.

Here, the joining surface may include any one of a semicircle, a semi-ellipse, a U-shape, a V-shape, a square, or a wave pattern in a cross-sectional shape of a hill or a valley in a direction perpendicular to the surface of the shank.

In addition, the shank may be formed to be inclined with respect to the rotation direction of the acid of the bonding surface. In addition, the shank may be formed inclined with respect to the direction of the front or rear of the mountain and valley.

Hereinafter, a wire saw bead according to the present invention will be described with reference to the accompanying drawings.

5 is a perspective view showing a wire saw bead according to the present invention, Figure 6 is a perspective view showing a shank of the wire saw beads according to the present invention.

As shown in FIGS. 5 and 6, the wire saw beads 120 according to the present invention are provided with a shank 122 made of a metal material, and an abrasive grain bonding layer 124 is formed on the shank 122. . In addition, a plurality of abrasive grains 126 are fixed to the abrasive grain layer 124.

Here, the shank 122 has a hollow portion penetrating both sides to be coupled to the wire (10 in FIGS. 1 and 2), and the hollow portion is inserted into the wire to be coupled in the form of a wire saw. In addition, the outer circumferential surface of the shank 122 is formed with a joint surface 123 that forms a valley 123b with the peak 123a while being twisted in a screw shape. In this case, the joining surface 123 is formed with at least one line of the peaks 123a and the valleys 123b, and the peaks 123a and the valleys 123b are formed at the entire circumference of the joining surface 123. It is preferable that the pitch is formed uniformly.

In addition, the shank 122 is formed such that the mountain 123a of the bonding surface 123 is inclined with respect to the rotation direction.

That is, the shank 122 has the highest point of the peak 123a located rearward from the center of the rotational axis with respect to the rotational direction, and is gentle to the rotational direction as a whole. Accordingly, the shank 122 increases the effective area for processing the workpiece.

In addition, the shank 122 is formed such that the front or rear of the mountain 123a and the valley 123b are inclined with respect to the traveling direction. Therefore, the shank 122 is easily attached to the abrasive as the front or rear of the hill 123a and the valley 123b are formed to be inclined. Guided to more accurate processing is possible, the durability of the shank 122 is improved.

The shank 122 configured as described above may be manufactured by cutting, rolling, or other method for forming the peak 123a and the valley 123b. In addition, the joint surface 123 has a cross section in the vertical direction of any one of a semicircle, a semi-ellipse, a U-shape, a V-shape, a square, or a wavy pattern by the peaks 123a and the valleys 123b. Will have

Accordingly, the abrasive grain layer 124 is formed in the form of a screw-shaped mountain and valley corresponding to the shape of the bonding surface 123 of the shank 122, and is fixed by the abrasive grain layer 124 126 are arranged in the shape of a mountain and a valley.

As such, the abrasive grains 126 coupled to the shank 122 by the abrasive grain layer 124 may have a difference in height fixed according to the shape of the hill 123a and the valley 123b.

Meanwhile, the abrasive grain layer 124 adheres the abrasive grains 126 to the bonding surface 123 of the shank 122 by an electro-plating method or a brazing method.

In this case, in the electrodeposition method, the abrasive bonding layer 124 is formed by wet electroplating of a plating solution containing nickel and the like, and the abrasive 126 is fixed to the shank 122.

In addition, the fusion method is a paste in the form of a paste consisting of a fusion metal powder and a binder, a metal powder paste is applied to the surface of the bonding surface 123 of the shank 122 in a mixed state with the abrasive grains 126. Then, the brazing heat treatment (brazing) to form the abrasive grain layer 124. Here, the fusion metal powder may include nickel or other metals or alloys, the metal powder paste is a binder component is volatilized during the brazing heat treatment, bonding the abrasive 126 to the shank 122 An abrasive grain bonding layer 124 is fixed to the surface 123, and the abrasive grains 126 are fixed to the shank 122.

7 is a cross-sectional view of a wire saw bead according to the present invention, the wire saw bead 120 has a difference in the height that the abrasive 126 is fixed according to the peak 123a and the valley 123b of the joint surface 123 As a result, the abrasive grains 126 which substantially perform the cutting process when cutting the workpiece are layered.

The abrasive grains 126 may be made of one selected from artificial or natural diamond, cubic boron nitride (cBN), silicon carbide, and alumina particles.

In addition, the shank 122 is preferably formed of a length of 5 ~ 20mm, the size of the diameter of 5 ~ 15mm. Accordingly, the length of the wire saw beads 120 is 5 to 20 mm, and more preferably, the diameter including the size of the abrasive grain layer 124 and the abrasive grains 126 is 5 to 15 mm.

In addition, since the wire saw beads 120 are directly attached to the bonding surface 123 of the shank 122 by the electrodeposition method or the fusion method, as described above, as shown in FIG. It is possible to arrange the abrasive grains 126 unevenly or uniformly in a single layer on the joining surface 123 of the shank 122.

The wire saw beads 120 made as described above are coupled to a wire, and a spacer made of rubber or synthetic resin (15 shown in FIG. 2) is coupled between the wire saw beads 120. The spacers allow each wire saw bead 120 to maintain a constant distance from each other.

The wire saw beads 120 are operated by the abrasive grains 126 fixed to the peaks 123a of the abrasive grain layer 124 during the cutting operation of the workpiece. On the other hand, the wire saw bead 120 is separated from the abrasive grains 126 fixed to the mountain 123a portion as the cutting operation of the workpiece (C) is weakened, or the abrasive grains of the acid 123a portion The bonding layer 124 wears first. Accordingly, the abrasive grains 126 fixed to the valley 123b portion of the abrasive grain layer 124 are exposed, and the cutting material is cut.

In this case, the wire saw beads 120 are formed so that the acid 123a is inclined with respect to the rotational direction, so that the abrasive 126 coupled thereon is also coupled in a shape corresponding to the shape of the acid 123a. The effective area of the abrasive 126 in contact with the workpiece is increased.

In addition, the wire saw beads 120 are formed to be inclined with respect to the advancing direction of the front and rear surfaces of the peaks 123a and the valleys 123b, so that the wire saw beads 120 are followed by the overhead lines processed by the preceding wire saw beads 120. The entrance of the wire saw beads 120 is guided. Therefore, the processing line of the workpiece is processed more accurately. In addition, the initial cutting force of the wire saw bead 120 is improved as the effective area where the front surface of the acid 123a and the valley 123b comes into contact with the workpiece is increased.

Hereinafter, the manufacturing process of the wire saw beads described above will be described.

First, to prepare a shank 122 formed with a hollow portion penetrating both sides to be coupled to a wire or the like. The shank 122 is formed on the outer circumferential surface of the joining surface 123 forming a peak 123a and a valley 123b in a screw shape, and the metal powder paste on the joint surface 123 of the shank 122 in a predetermined thickness. Apply. Thereafter, the metal powder paste remains semi-dry and adheres abrasive grains 126 to the surface thereof.

Next, when the metal powder paste is subjected to brazing heat treatment, the binder component in the metal powder paste is volatilized, and the abrasive grain layer 124 is formed, whereby a plurality of abrasive grains 126 are formed on the abrasive grain layer 124. Is fixed. In this case, the abrasive grains 126 are fixed according to the shape of the joining surface 123 of the shank 122, that is, the shape of the hill 123a and the valley 123b.

As described above, the wire saw beads 120 described a process in which the abrasive grains 126 are attached by the fusion method, but the abrasive grains 126 are attached to the joint surface 123 of the shank 122 by electrodeposition. It is also possible to be attached. In this case, the abrasive 126 is attached to the shank 122 by an abrasive bonding layer 124 formed by wet electroplating a plating solution containing nickel or the like.

The wire saw beads 120 configured as described above release the cutting and heat of the workpiece through the portion where the abrasive bonding layer 124 and the abrasive grains 126 are valleyed, that is, the lower portion.

As the wire saw beads 120 according to the present invention are used for a long time, the abrasive bonding layer 124 is worn, and the bonding force of the abrasive grains 126 is weakened and is separated. Such wear of the abrasive bonding layer 124 and separation of the abrasive grains 126 occur from the mountainous portion, that is, the high portion. The wire saw beads 120 are then exposed to increasingly lower abrasive grains 126 and are subjected to substantial cutting.

Meanwhile, in the process of cutting the workpiece, the wire saw beads 120 are rotated along the outer circumferential surface of the screw shape.

As such, the wire saw is further improved in cutting force as the wire saw bead 120 rotates, and as the wire saw bead 120 is uniformly cut, wear is uniform, thereby enabling more accurate cutting.

Although the wire saw beads according to the present invention have been described with reference to the illustrated drawings as described above, the present invention is not limited to the embodiments and drawings described above, and usually within the scope of the claims. Of course, various modifications and variations can be made by those skilled in the art.

As described above, the wire saw beads according to the present invention can be cut by the abrasive grains of the lower part, when the abrasive grains of the upper part is separated from each other, since the abrasive grains for substantial cutting are arranged in layers. The abrasive grains are arranged along the bone to facilitate cutting and cutting of the cutting material, which improves cutting performance, increases durability, and forms a screw shape in contact with the cutting material. This occurs, the cutting performance is further improved, and since the outer circumferential surface is uniformly worn by the rotation, uneven wear can be prevented.

In addition, the wire saw beads may be unevenly or uniformly arranged by electrodeposition and fusion, in which abrasive grains are arranged in a multilayer unevenness in wire saw beads manufactured by a sintering method, which accounts for about 80% or more of all diamond tools. It does not respond to very complex shanks and has the advantage of arranging abrasive grains in more complex and varied patterns.

In addition, the wire saw bead is formed to be inclined with respect to the rotation direction of the acid and valley of the shank, the effective area of the abrasive grains bonded to the joining surface is in contact with the workpiece, the cutting performance is further improved, the rotation direction Durability is further improved.

In addition, as the wire saw beads are formed to be inclined in the direction of travel of the shank and the valleys, the effective area at which the abrasive grains bonded to the joining surfaces initially contact the workpiece is increased, and the overhead lines formed by the preceding wire saw beads As the wire saw bead following is guided in the direction of entry, the cutting material can be cut more accurately.

Claims (4)

In the wire saw beads which are provided in a plurality of wires and are used for cutting, The hollow part is inserted into the wire is formed, made of a metal material and twisted in a screw shape on the outer peripheral surface having a joining surface forming a valley with a hill, the pitch between the peak and the valley formed on the front circumference of the joining surface and , An abrasive grain layer formed on the surface of the joining surface of the shank with a predetermined thickness; A plurality of abrasive grains arranged corresponding to the bonding surface in the abrasive bonding layer, Wire saw beads, characterized in that for bonding the abrasive grains by electrodepositing or fusion bonding the abrasive grain layer on the surface of the bonding surface. The method according to claim 1, The joining surface is a wire, characterized in that the cross-sectional shape of the peak or valley in the direction perpendicular to the surface of the shank comprises any one of semi-circular, semi-elliptic, U-shaped, V-shaped, square, or wavy Saw bead. The method according to claim 1 or 2, The shank is a wire saw bead characterized in that the acid of the joining surface is formed inclined with respect to the rotation direction. The method according to claim 1 or 2, The shank is a wire saw bead characterized in that the front or rear of the hill and the valley is formed inclined with respect to the direction of travel.

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