KR100590833B1 - Bead and Wire Saw for Wire Saw - Google Patents

Abstract

The present invention relates to a wire saw used to cut a stone or concrete structure, etc., to provide a bead and a wire saw for the wire saw to improve the life and cutting performance by forming a stage on the outer surface of the shank. have.

The present invention comprises a hollow cylinder shank made of a metal material, a metal binder layer integrally coupled to an outer surface of the body portion of the shank, and an abrasive fixed to the outer surface of the body portion of the shank by the metal binder layer. In the bead for wire saw,

A body portion of the shank to which the abrasive is fixed consists of two or more regions;

A stage is formed between the region and the region; And

Among the above-mentioned areas, a wire saw bead and a wire saw having the wire saw beads are formed so as to have the largest diameter except an area located at the top of the cutting direction.

According to the present invention, it is possible to provide a bead and wire saw with improved life and cutting force.

Wire Saw, Shank, Metal Bonding Layer, Bead, Abrasive

Description

A Bead for Wire Saw and Wire Saw Having It}

1 is a schematic view showing a cutting operation using a conventional wire saw

Figure 2 is a partial detail view of a conventional wire saw, (a) shows a wire saw fixed to the wire by the resin layer, (b) is a wire saw fixed to the wire by a spring. Indicates

3 is a cross-sectional view showing a conventional wire saw beads

4 is a cross-sectional view showing examples of the wire saw beads according to the present invention.

5 is a cross-sectional view showing another example of the wire saw beads according to the present invention.

6 is a cross-sectional view showing other examples of the wire saw beads according to the present invention.

7 is a schematic view showing a wire saw of the present invention in which a bead according to the present invention is fixed to a wire, wherein (a) shows a wire saw in which beads are fixed to a wire by a resin layer, and (b) is a spring. Refers to a wire saw with a bead fixed to the wire by

Explanation of symbols on the main parts of the drawings

1a, 1b. . Wire saw 10a, 10b. . Bead

11a, 11b, 11c, 21a. . Shank 12. . Metal binder layer

13. . Abrasive 15a, 15b, 15c, 25a. . Sweet

111,112,113, 211. . Body part 211a, 211b, 211c. . Notch

The present invention relates to a wire saw used to cut a stone or concrete structure, and more particularly, to a wire saw bead and wire saw for improving the life and cutting performance by forming a stage on the outer surface of the shank.

In general, as a cutting tool used to cut stone and concrete structures, a circular saw (hereinafter referred to as a circular saw) and a wire saw are commonly used. The biggest difference between wire saws is whether or not to limit the size of the workpiece to be cut.

That is, the circular saw can not cut the workpiece having a thickness greater than the radius in the cutting structure, the wire saw can easily cut the workpiece having any large thickness according to its length, and is not limited by the shape of the workpiece, etc. Do not.

Accordingly, the wire saw is widely used in cutting work for dismantling the reinforced concrete structure as well as cutting work for collecting stone.

1 is a schematic view showing a cutting operation using a conventional wire saw.

As shown in FIG. 1, in order to cut the workpiece by using the wire saw, a guide rail 210 is installed in the vicinity of the workpiece 300, and the wire saw machine 200 slides on the guide rail 210. After allowing this to be seated, it is formed through the vertical hole 301 in the cut portion of the workpiece 300.

Next, the wire saw 100 inserted through the vertical hole 301 is hooked to the drive pulley 201 of the wire saw machine 200, and the rotational power of the drive pulley 201 rotates in one direction when the power is applied. The workpiece 300 is to be cut by the wire saw 100 rotated in one direction.

Figure 2 (a) (b) is a partial detail showing a conventional wire saw manufactured by electroplating or brazing, as shown, the conventional wire saw 100 is a wire 110 made by twisting a plurality of steel wires It is a combination of a plurality of diamond tips bead 120 at regular intervals on the outer surface of the

The bead 120 is a hollow cylindrical shank 121 made of a metal material, a metal binder layer 122 that is integrally coupled to an outer surface thereof, and a plurality of diamonds D fixed by the metal binder layer. It is composed.

Here, the metal binder layer 122 for supporting the diamond (D) is the sintering, brazing or electroplating of the metal powder composed of one or more other metals, such as iron, cobalt and nickel as a base metal It is coupled to the outer surface of the shank 121.

In the wire saw 100, the beads 120 configured as described above are coupled to the wire 110 at a predetermined interval.

As the coupling method of the beads 120, a resin coupling method or a spring connection method is used as shown in FIG. 2 (b).

The resin bonding method is by setting the center of the hollow-cylindrical cylindrical shank 121 disposed at a predetermined interval in the mold in a state where the wire 110 penetrates, and by injection molding a resin such as polyurethane or rubber in the mold, The bead 120 disposed at a predetermined interval on the wire 110 is fixedly bonded to the wire as the resin layer 130.

Here, a screw thread may be formed on the inner surface of the shank 121 of the bead 120 so as to increase the bonding force with the resin layer 120.

In addition, in the spring connection method, as shown in FIG. 2 (b), the diamond d is mounted on the metal binder layer 122 with the hollow cone cylindrical shank 121 at a predetermined distance to the wire 110, and then adjacent to the wire 110. Spring members 141 are respectively disposed to maintain a predetermined interval between the shanks 121.

In addition, a space 142 may be provided at both ends of the shank 121 so that both ends of the spring member 141 do not directly contact the shank 121.

The shank 121 includes a front end portion 121a and a rear end portion 121b to which an abrasive is not bonded and a body portion 121c to which an abrasive is coupled to an outer surface thereof, wherein the body portion 121c and the tip portion 121a are attached to the shank 121. Ends 121d and 121e are formed between the gaps and between the body portion 121c and the rear end 121b.

As shown in FIG. 3, the bead 120 manufactured by the conventional electroplating method has a bonding force between the plated layer and the shank due to the state of the outer surface of the body portion 121c of the shank 121 to be electroplated or the plating conditions. The metal binder layer 122 may be easily detached from the shank 121 by the load generated during cutting, compared to the beads produced by the sintering.

In addition, due to the high concentration of the bead surface has a problem compared to the sintered beads there is a problem that the load is slightly higher during operation.

On the other hand, the conventional bead produced by the brazing method has a similar problem to the bead produced by electroplating.

The present inventors have conducted research and experiments to solve the problems of the prior art as described above, and the present invention has been proposed based on the results, and the present invention has a body part of the shank on which the abrasive is fixed. The present invention provides a wire saw bead and a wire saw provided with the bead, which are formed to have two or more regions to be partitioned to increase the contact area between the metal binder layer and the shank, thereby further improving the bonding strength of the metal binder layer. It is.

Another object of the present invention is to provide a wire saw bead and a wire saw provided with the bead to improve the bonding strength and cutting force by adjusting the outer diameter of the body portion of the shank is formed.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated.

The present invention comprises a hollow cylinder shank made of a metal material, a metal binder layer integrally coupled to an outer surface of the body portion of the shank, and an abrasive fixed to the outer surface of the body portion of the shank by the metal binder layer. In the bead for wire saw,

A body portion of the shank to which the abrasive is fixed consists of two or more regions;

A stage is formed between the region and the region; And

A wire saw bead and a wire saw provided with the wire saw beads, wherein a region other than the one located at the top of the cutting direction is formed to have the largest diameter.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail.

The present invention relates to a wire saw comprising a hollow cylindrical shank made of a metal material, a metal binder layer integrally coupled to an outer surface of a body portion of the shank, and an abrasive fixed to the outer surface of the body portion of the shank by the metal binder layer. It is applied to the dragon beads and the wire saw provided with the beads.

The shank typically includes a line and a rear end to which the abrasive is not bonded and a body portion to which the abrasive is coupled to an outer surface thereof, and a stage is formed between the body portion and the front end portion and between the body portion and the rear end portion.

Beads for wire saws in accordance with the present invention comprise a shank comprising two or more regions whose body portions are defined by a stage.

That is, the body portion of the shank of the present invention has one or more stages.

The ends are preferably formed perpendicular to the cutting direction.

The body portion of the shank is formed such that a region other than the region located at the top of the region in the cutting direction has the largest diameter.

The stage formed in the said body part is one or more, Preferably it is 2-4 pieces.

Preferably the height of the said stage is 0.05 mm or more, More preferably, it is 0.05-0.5 mm.

Each area of the shank body portion is preferably such that it has a width of 0.5 to 3mm in the longitudinal direction of the shank, the width of each area may be the same as each other or may be formed some or all differently.

In addition, the outer surface of each area of the body portion of the shank does not necessarily have to be horizontal, but may be formed to be inclined, and when formed to be inclined, the inclination is preferably set to 15 degrees or less.

It is preferable that a plurality of notches are formed on the outer surface of the body portion of the shank in which the stage is formed, and the shape of the notch is preferably triangular, square or semicircular.

When the notch is formed on the outer surface of the body portion of the shank in which the stage is formed, the bond between the metal bonding layer and the shank is further strengthened to extend the life of the bead.

The abrasive is fixed over the entire outer surface of the body portion of the shank of the invention where the stage is formed.

Diamond particles which can be preferably used in the present invention include diamond particles.

The abrasive is preferably maintained integrally by electroplating or brazing on the outer surface of the body portion of the shank of the present invention, the end of which is formed.

The wire saw of this invention is comprised including the bead comprised as mentioned above.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

4 is a cross-sectional view showing longitudinally cut shanks of examples of wire saw beads consistent with the present invention.

As shown in Figs. 4A and 4B, the wire saw beads 10a and 10b according to the present invention include the shank 11a, the metal binder layer 12, and the abrasive 13. .

The shanks 11a and 11b are made of a metal material, and a through-hole hollow penetrating therein is formed therein, and the hollow is formed so that the wire of the wire saw penetrates.

In addition, the shanks 11a and 11b include a front end portion 31 and a rear end portion 32 to which the abrasive is not bonded, and a body portion 111 to which the abrasive is coupled to an outer surface thereof. The body portion 111 ) And the ends 31a and 31b are formed between the front end 31 and the body 111 and the rear end 32, respectively.

Two ends 15a and 15b are formed on the outer surfaces of the body portions 111 and 112 of the shanks 11a and 11b, respectively.

That is, the outer surfaces of the body portions 111 and 112 of the shank to which the abrasive is fixed are divided into three regions 111a, 111b, 111c and 112a respectively divided by two ends 15a and 15b. , 112b, 112c).

As shown in FIGS. 4 (a) and 4 (b), respective regions of the body portion 111 of the shank 11a to which the abrasive 13 is fixed have a horizontal outer surface, and these regions have a horizontal outer surface. As shown in (a), the shank 11b in which the abrasive 13 is fixed is formed so as to be sequentially positioned from a region having a small diameter while going from the front end to the rear end in the cutting direction, or as shown in FIG. Among the regions of the body portion 112 of the large diameter 112b may be formed to be in the center.

On the other hand, the outer surface of each region of the shank body portion is not necessarily horizontal, as shown in Figure 5, each region 113a of the body portion 113 of the shank 11c of the bead 10c , 113b and 113c may be formed to be inclined, and the inclination is preferably set to 15 degrees or less.

The area of the body portion of the shanks 11a, 11b, and 11c is preferably two or more, more preferably three to five.

That is, it is preferable that one or more stages 15a, 15b and 15c are formed in the body portions of the shanks 11a, 11b and 11c, more preferably 2 to 4 stages. It is formed.

In the present invention, as the area of the shank body portion increases, that is, as the number of stages increases, the area on the outer diameter side of the bead increases, so that the bonding force between the metal bonding layer and the shank becomes high, but in the case where the number of stages is too large, the direction of wire travel The impact load generated during the cutting operation is weak.

The height of the stage formed in the body portion of the shank is preferably 0.05 mm or more, more preferably 0.05 to 0.5 mm.

As the height of the stage increases, there is an abrasive present in an area having a relatively small diameter. In this case, an exposed portion of the abrasive located in an area having a smaller diameter is too low than an abrasive located in an area having a large diameter. You may not be able to participate in the cutting operation.

This not only reduces the number of abrasives involved in the cutting operation, but also when the abrasive located in the largest diameter reaches the end of its life, the abrasive located in the next smaller diameter must continue to participate in the cutting operation, As a result, the exposure of the abrasive is hindered, which causes the cutting load to be increased, thereby reducing the life of the beads.

The width in the shank length direction of each region constituting the body portion is preferably set to 0.5 to 3 mm, and each portion may have a different width.

In the case where the body portion of the shank forms a stage according to the present invention, the bonding area between the metal binder layer and the shank is increased with respect to the cutting load generated when cutting the workpiece, and the bonding force of the metal binder layer is improved by increasing the area. As a result, it increases the life of the beads.

In addition, when the end of the body portion of the shank according to the present invention, the height of the abrasive is changed, thereby reducing the number of abrasives participating in the work between the abrasive and the workpiece during the cutting operation to reduce the cutting load At the same time, the cutting speed by the beads is increased.

In addition, as in the present invention, the diameter of the region located at the top of the shank portion of the shank is formed to be smaller than the largest diameter of the diameters of the shank, so that the bead is in contact with the workpiece to cut the workpiece It reduces the load generated by the load and guides the wire to the cutting grooves, thereby reducing the damage and detachment caused by the impact of the bond layer.

Furthermore, in the present invention, as shown in Figs. 6A, 6B, and 6C, a plurality of notches 211a, (in the body portion 211 of the shank 21a in which the stage 25a is formed, ( It is preferable to form 211b) and 211c.

Fig. 6 (a) shows a notch 211a having a triangular shape, Fig. 6 (b) shows a notch 211b having a rectangular shape, and Fig. 6 (c) shows a notch 211c having a semicircular shape. Indicates.

When the notch is formed as described above, the bond between the metal bonding layer and the shank is further strengthened to extend the life of the beads.

The size of the notch is preferably smaller than the diameter of the abrasive, because if the diameter of the notch is larger than the diameter of the diamond, the abrasive may be included therein. Because it can.

Of course, the notch may be formed even when the diameter of the body portion does not sequentially increase in the advancing direction of the shank as shown in FIG. 4 (b), as well as when the regions of the body portion are inclined as shown in FIG. 5.

On the other hand, the abrasive is fixed over the entire outer surface of the body portion of the shank of the present invention, the end is formed.

As the abrasive, diamond particles are preferable.

The metal binder layer 12 is integrally coupled to the outer surfaces of the shanks 11a, 11b, and 11c, and the plurality of abrasives 13 are integrally joined by the metal binder layer 12 to the shank 11a. ) To the outer surfaces of (11b) and (11c).

The metal binder layer 12 is preferably integrally bonded to the shanks (11a), (11b) and (11c) by an electroplating method or a brazing method.

7 shows examples of wire saws consistent with the present invention.

As shown in FIG. 7A, the beads 10 constructed in accordance with the present invention are fixed to the wire 110 by a resin layer 21 at a predetermined interval to constitute the wire saw 20a of the present invention. Done.

The wire saw 20a of the present invention is urethane or rubber into the mold in a state of being placed on a mold (not shown) so that the wire 110 is located in the hollow portion of the shank 11 of the bead 10 of the present invention. By injection molding the same resin material, the beads 10 are manufactured by the injection molded resin layer 21 to be fixed to the wire 110 at a predetermined interval.

In addition, the bead 10 is configured according to the present invention, as shown in Figure 7 (b), is fixed to the wire 110 at a predetermined interval by the spring 22 is another wire saw 20b of the present invention Will be configured.

Spacers 23 may be mounted at the front and rear ends of the spring member 22 to reduce wear of the shank 11.

When cutting the workpiece using the wire saw of the present invention configured as described above, the life of the bead is long, and the cutting ability can be further improved.

Hereinafter, the present invention will be described in more detail with reference to Examples.

(Example 1)

According to the present invention, a hollow cone-shaped shank having a stage formed on an outer surface thereof was prepared.

The body portion is formed of three regions of different diameters, that is, formed to include two stages.

Each of the three regions had a width of 2 mm and the height of each of the stages was 0.1 mm.

Beads were prepared by fixing diamond particles, which are abrasives, on the outer surface of the body portion of the shank prepared as described above using a metal binder.

At this time, the fixing of the diamond particles by the metal binder was made by the electroplating method.

The beads prepared as described above were attached to 40 beads per 1m by the resin layer to produce a wire saw having a length of 10m.

Using the wire saw (invention material) produced according to the present invention as described above and the conventional wire saw (conventional material) manufactured using the shank is not formed in the outer surface of the body portion of the shank as shown in FIG. Reinforced concrete workpieces of 5% reinforcement ratio having a length of 1m and 0.5m of horizontal and vertical sides were cut 20 times, the cutting load and the degree of wear were measured, and the measurement results are shown in Table 1 below.

At this time, the working conditions were 25m / s circumferential speed, 1m ² / Hr cutting speed.

Conventional Invention Cutting performance index (%) 100 135 Life index (%) 100 125

As shown in Table 1, it can be seen that the invention material according to the present invention is superior in cutting performance compared to the conventional material.

In addition, in the case of the invention it was confirmed that the life is improved by 25% compared to the conventional material.

As described above, the present invention has an effect of providing a bead and a wire saw including the same by improving the bonding strength between the shank and the metal binder layer.

In addition, the present invention has an effect of providing a bead and a wire saw including the same, in which not only the lifespan is improved but the number of abrasives exposed on the surface of the beads is changed to increase the cutting force.

Claims (22)

A wire saw comprising a hollow shank made of a metal material, a metal binder layer integrally bonded to the outer surface of the body portion of the shank, and an abrasive fixed to the outer surface of the body portion of the shank by the metal binder layer. In the dragon beads, A body portion of the shank to which the abrasive is fixed consists of two or more regions; A stage is formed between the region and the region; And Beads for wire saws, characterized in that the region other than the region located at the top of the cutting direction has the largest diameter. The bead for wire saw according to claim 1, wherein the outer surface of each area of the body portion is horizontal. An outer surface of each region of the body portion is inclined. Wire saw beads The bead for wire saw according to claim 3, wherein the inclination of the outer surface is 15 degrees or less. The bead for wire saw according to any one of claims 1 to 4, wherein the body parts have 3 to 5 regions. The bead for wire saws according to any one of claims 1 to 4, wherein the height of the end is 0.05 mm or more. The bead for wire saw according to claim 5, wherein the height of the end is 0.05 mm or more. The bead for wire saw according to claim 6, wherein the height of the end is 0.05 to 0.5 mm. The bead for wire saw according to claim 7, wherein the height of the end is 0.05 to 0.5 mm. The bead for wire saw according to any one of claims 1 to 4, wherein the width of the areas of the body portion in the shank length direction is 0.5 to 3 mm. The bead for wire saw according to claim 5, wherein the width of the areas of the body portion in the shank length direction is 0.5 to 3 mm. The bead for wire saw according to claim 6, wherein the widths of the areas of the body portion in the shank length direction are 0.5 to 3 mm. 10. The bead for wire saw according to any one of claims 7 to 9, wherein the width of the regions of the body portion in the shank length direction is 0.5 to 3 mm. The bead for wire saw according to any one of claims 1 to 4, wherein a notch of a triangular, square or semicircular shape is formed on an outer surface of the body portion. The bead for wire saw according to claim 5, wherein a notch of a triangular, square or semicircular shape is formed on an outer surface of the body portion. The bead for wire saw according to claim 6, wherein a notch of a triangular, square or semicircular shape is formed on an outer surface of the body portion. 15. The bead for wire saw according to claim 14, wherein the notch has a size smaller than the diameter of the abrasive. The bead for wire saw according to claim 15 or 16, wherein the notch has a size smaller than the diameter of the abrasive. The bead for wire saw according to any one of claims 1 to 4, wherein the metal binder layer is integrally bonded to the shank by an electroplating method or a brazing method. The bead for wire saw according to claim 5, wherein the metal binder layer is integrally bonded to the shank by electroplating or brazing. 7. The bead for wire saw according to claim 6, wherein the metal binder layer is integrally bonded to the shank by electroplating or brazing. In the wire saw in which the beads are fixed to the wire at fixed intervals, The bead is a bead according to any one of claims 1 to 21, characterized in that the wire saw

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