JP2006102905A - Wire saw - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wire saw structured so that hard abrasive grains are previously attached by brazing using a hard solder fast to the peripheral surfaces of coil springs whose cut section shape assumes an ellipse or semi-ellipse and connected continuously to the peripheral surface of a wire rope covered with synthetic resin or rubber, followed by winding around and being shaped into a loop form, whereby the wire saw can be constructed at low cost and have a long service life, and its cutting blades are equipped with a sharpness and a long lifetime and the coil spring has a large spring constant and less deflection amount to lead to avoidance of a damage of the wire rope covering layer and rusting, corrosion, and severance of the wire rope. <P>SOLUTION: The wire saw is composed of the wire rope 3 comprising element wires 2, the covering layer 4 put on the wire rope 3 over its whole length, being connected continuously at intervals with the predetermined length of the wire rope 3 and wound around, and a plurality of coil springs 7 where the cutting blades 6 consisting of the hard abrasive grains 5 are attached fast to the peripheral surface 8 and which are embedded in the covering layer 4 and have a cut section shape assuming an ellipse or semi-ellipse. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a wire saw used for cutting concrete structures, stones, and steel structures.

Conventionally, for example, Japanese Patent Laid-Open No. 2002-66901 (Patent Document 1) has proposed a wire saw and a method for manufacturing the same. In the above-described conventional example, a rope-shaped core wire is inserted over the entire length of the inner space of a multiple-strand coil-shaped metal base wire having a large number of abrasive grains fixed on the outer surface, and the core wire is elastic of the base metal wire. A wire saw is configured by being fixed to the base metal wire itself by friction caused by deformation or the like. Furthermore, the entire circumference of the wire saw or the outer periphery of the core wire portion is covered with a rubber or plastic coating material to shield the surface of the core wire.
In addition, in the embodiment, the cut surface shape of the above-described double coiled base metal wire is a hexagonal shape, but a circular shape or a rectangular shape is preferable from the viewpoint of the coil manufacturing method and cost. For this reason, vibration and noise are low, stable grinding performance for a long time can be maintained, and it is also effective for cutting processing such as FRP where clogging and seizure are likely to occur. From hard stone materials to concrete structures, artificial marble, ceramic industry lumber Suitable for a wide range of applications. Overall, it is a wire saw with low cost, high safety and high added value.
JP 2002-66901 A

  Accordingly, the present invention provides a wire in which hard abrasive grains are fixed in advance by brazing using a hard brazing to the outer peripheral surface of a coiled spring having an elliptical or semi-elliptical cutting surface, and coated with a synthetic resin or rubber. Continuously connected to the outer peripheral surface of the rope, wound, and formed into a loop shape, the cutting blade has a good sharpness and a long life, and the spring constant of the coiled spring is high and the amount of deflection is large. An object of the present invention is to provide a wire saw having a low cost, having a long service life in which damage to the wire rope coating layer and rusting, corrosion, and breakage of the wire rope are avoided.

The present invention of claim 1 is a wire rope configured by twisting wire strands;
A coating layer made of synthetic resin or rubber coated over the entire length of the wire rope;
The wire rope is continuously connected and wound every predetermined length, a cutting blade made of hard abrasive is fixed to the outer peripheral surface, the cutting blade is embedded in the coating layer, and the cut surface shape is elliptical A wire saw comprising a plurality of coiled springs having a shape or a semi-elliptical shape.

The present invention of claim 2 is the wire saw according to claim 1, wherein the hard abrasive grains are fixed to the outer peripheral surface of the coil spring by brazing using a hard solder.

According to a third aspect of the present invention, both ends of each of the plurality of coiled springs are connected to one end or the other end of the adjacent coiled spring by welding or brazing, and the coiled spring is connected to the wire rope. The wire saw according to claim 1, which is continuously connected to each other in the longitudinal direction.

The present invention of claim 4 is the wire saw according to claim 1, wherein the major axis of the cut surface shape is parallel to the longitudinal direction of the wire rope.
Here, when the shape of the coil spring is circular, the amount of effective abrasive grains that can contribute to cutting among the abrasive grains arranged on the outer surface of the coil wire is small. Therefore, if the pitch P of the coil is shortened in order to increase the effective amount of abrasive grains, the interval s between the coil strands is shortened, so that the flexibility of the wire saw is lost, and the permeability of rubber and synthetic resin is also reduced. On the other hand, when the cut surface has an elliptical shape or a semi-elliptical shape, the effective amount of abrasive grains can be increased without shortening the coil pitch P, and the above disadvantages can be solved.

In the present invention of claim 5, the wire rope is cut to an arbitrary length,
The coiled springs at both ends of the cut wire rope are extracted, and a sleeve is inserted through the outer peripheral surface of the wire rope corresponding to the extracted length,
The wire saw according to claim 1, wherein the both ends of the wire rope and the sleeve are integrally fastened by fastening means to be formed in a loop shape.

In the present invention of claim 6, the wire rope is cut to an arbitrary length,
The coiled spring is compressed in the longitudinal direction of the wire rope from both ends of the cut wire rope to expose the wire rope at both ends, and the both ends of the exposed wire rope are knitted together and connected. Formed in a loop shape,
The wire saw according to claim 1, wherein the compression of the coiled spring is released and the coiled spring is moved to the braided portion.

According to the present invention of claim 1, as shown in FIGS. 1 a and 3 a, the wire saw 1 includes a wire rope 3 formed by twisting wire strands 2, and
A coating layer 4 made of a synthetic resin or rubber coated over the entire length of the wire rope 3;
The wire rope 3 is continuously connected and wound every predetermined length, the cutting blades 6 and 23 made of hard abrasive grains 5 are fixed to the outer peripheral surfaces 8 and 22, and the cutting blades 6 and 23 are attached to the coating layer 4. It comprises a plurality of coiled springs 7 and 21 that are embedded and have a cut surface shape that is elliptical or semi-elliptical.
For this reason, the cutting blade has a good sharpness, has a long life, prevents damage to the wire rope coating layer 4, and prevents rusting, corrosion, and breakage of the wire rope 3. Wire saws 1 and 20 having a long service life and low manufacturing costs can be obtained.

According to the second aspect of the present invention, as shown in FIGS. 1 b and 3 b, the hard abrasive grains 5 are fixed to the outer peripheral surfaces 8 and 22 of the coiled springs 7 and 21 by brazing using the hard solder 9. The
For this reason, the sharpness fall by the fall of a hard abrasive grain, etc. is prevented, and it becomes a long life.

According to the present invention of claim 3, as shown in FIG. 2, both ends 10, 10 of each of the plurality of coil springs 7 are welded to one end 7 a or the other end 7 b of the adjacent coil spring 7. Alternatively, they are connected by brazing, and the coiled springs 7 are continuously connected to each other in the longitudinal direction of the wire rope 3.
Thereby, repeated loads such as twisting, bending, and tension / compression applied to the coil spring during cutting and cutting are dispersed and absorbed over the entire length of the wire saw 1.
For this reason, damage to the coating layer 4 of the wire rope 3 is prevented, and rusting, corrosion, and breakage of the wire rope 3 are avoided.

According to the fourth aspect of the present invention, as shown in FIGS. 1 a and 3 a, the major axis of the cut surface shape of the coiled springs 7 and 21 is parallel to the longitudinal direction of the wire rope 3.
For this reason, the spring constant is large and the amount of deflection of the spring is small compared to a coiled spring having a circular or square cut surface. The displacement margin becomes larger with respect to the longitudinal tensile force acting on the coating layer 4, and the displacement amount of the coating layer 4 is minimized. Thereby, the damage of the coating layer 4 is prevented, rusting, corrosion, and breakage of the wire rope 3 are avoided, and the service life of the wire saws 1 and 20 is improved.

According to the present invention of claim 5, as shown in FIGS. 5 a and 5 b, the wire rope 3 is cut to an arbitrary length, and coiled springs 7 at both ends 3 a and 3 b of the cut wire rope 3, 7 or in place of the coiled springs 7 and 7, the semi-elliptical coiled springs 21 and 21 in FIG. 4 are extracted, and the sleeve 12 is provided on the outer peripheral surfaces 11 a and 11 b of the wire rope 3 corresponding to the extracted length. The both ends 3a, 3b of the wire rope 3 and the sleeve 12 are fastened together by fastening means (not shown) to form a loop shape. As a result, as in the case of a long coil spring, the semi-elliptical coil spring 21 in FIG. The difficulty of cutting with can be avoided. Moreover, the connection part of the wire rope 3 becomes strong.
For this reason, the wire saw 1 in FIG. 3a can be obtained instead of the wire saw 1 in FIG.

According to the present invention of claim 6, as shown in FIG. 6 a, the wire rope 3 is cut to an arbitrary length, and the coiled springs 7, 7 or coils are formed from both ends 3 a, 3 b of the cut wire rope 3. 4 are compressed in the longitudinal direction of the wire rope 3 to expose the wire ropes 3 at both ends 3a and 3b, as shown in FIG. 6b. Thus, both ends 3a and 3b of the exposed wire rope 3 are knitted and connected to each other to form a loop shape, and as shown in FIG. 6c, coil springs 7 and 7 or coil springs 7 7, the compression of the semi-elliptical coiled springs 21, 21 in FIG. 4 is released, and the coiled springs 7, 7 or the coiled springs 7, 7 are released. Instead, the coiled springs 21, 21 of semi-elliptical in FIG. 4 is moved to the knitting section 30. Accordingly, the braided portion 30 of the wire rope 3 is strong, and the coiled spring 7 or the semi-elliptical coiled spring 21 in FIG. 4 is wound instead of the coiled spring 7 over the entire length of the wire rope 3. Instead of the wire saw 1 or the wire saw 1, the followability to bending and twisting of the wire saw 20 in FIG.
For this reason, the wire saw 20 in FIG. 3 can be obtained instead of the wire saw 1 in FIG.

Hereinafter, the present invention will be described with reference to the drawings based on the embodiments.
In one embodiment of the wire saw of the present invention, as shown in FIGS. 1 a and 1 b, the wire saw 1 is composed of a wire rope 3 formed by twisting wire strands 2, and a total length of the wire rope 3. A covering layer 4 made of synthetic resin or rubber and a wire rope 3 are continuously connected and wound every predetermined length, and a cutting tool 6 made of hard abrasive grains 5 is fixed to the outer peripheral surface 8. The cutting blade 6 is composed of a plurality of coiled springs 7 embedded in the coating layer 4 and having a cut surface of an elliptical shape.

Next, as shown in FIGS. 1a and 1b, the outer peripheral surface 8 along the major axis of the elliptical shape among the outer peripheral surfaces of the coiled spring having a predetermined length in which the cut surface shape of the coiled spring 7 is elliptical. The cutting blade 6 is fixed to a predetermined area including the soldering by brazing using a hard solder. Thereby, it has the characteristic that the effective length of the cutting blade 6 which contacts a to-be-cut object is long compared with a circular cut surface shape, and cutting efficiency improves more. The cutting blade 6 is preferably formed from hard abrasive grains 5 such as diamond and borazon. Also, as shown in FIG. 1 b, the thickness 6 a of the layer of the cutting blade 6 to be formed is preferably one hard abrasive grain 5. Further, in consideration of the connection between the coil springs 7 by welding or brazing, or the cutting of the coil spring 7 at a predetermined length when the wire rope 3 is connected, both ends 7a in the axial direction of the coil spring 7; It is desirable that the hard abrasive 5 is not fixed to the joint portion 10 to be welded or brazed 7b.

A specific method of brazing using the hard solder 9 is to first knead a flux and a powdered brazing material, and uniformly apply this to a predetermined region of the outer peripheral surface of the coiled spring 7. Before the brazing material layer dries, the hard abrasive grains 5 are sprayed and pushed to embed the hard abrasive grains 5. Next, the coiled spring 7 is put into a furnace (vacuum furnace), the brazing material is melted, and the hard abrasive grains 5 are fixed.
The brazing method using the hard brazing 9 is preferably brazing in a vacuum furnace, but there are various methods such as brazing using combustion heat, electricity, light, etc. as a heat source, ultrasonic brazing, metallizing method, etc. It can be set according to the abrasive grains, the material of the coiled spring 7 and the required quality (strength).
The brazing material in brazing using the hard brazing 9 is preferably a silver brazing or copper brazing containing Ti, but in the case of silver brazing, Ag—Cu—Ni brazing, and in the case of ceramics, Ag—Cu—Ti brazing. For copper brazing, Cu—Mn—Ni brazing or the like is used.
The material of the coil spring 7 can be selected from spring steel, hard steel, piano wire, stainless steel, etc., depending on the application.

Further, as shown in FIG. 1 a, the cut surface shape of the coil spring 7 is elliptical, and the long axis of the cut surface shape is configured to be parallel to the longitudinal direction of the wire rope 3. As a result, the spring constant is high, the amount of deflection of the spring is small, and the displacement margin becomes larger with respect to the tensile force in the longitudinal direction acting on the coating layer 4, compared to a coiled spring having a circular or square cut surface. The amount of displacement of the coating layer 4 is minimized. Damage to the coating layer 4 is prevented, and rusting, corrosion, and breakage of the wire rope 3 are avoided, and the service life is improved.

Next, as shown in FIG. 2, both ends 10 and 10 of a plurality of coiled springs 7 having a predetermined length are brought into line contact with one end 7a or the other end 7b of adjacent coiled springs 7 to form contact lines. And connected by welding or brazing.
Laser welding is most suitable industrially as the welding method. Further, preferably, the hard abrasive grains 5 are not fixed to the portion 10 connected by welding or brazing. In this case, if the hard abrasive grains (diamond) 5 are fixed to the portion 10 to be connected, there is a possibility that the laser beam is irradiated to the diamond and the diamond explodes and cannot be welded. Also, the welded joint is linear, and the specifications such as the length of the joint are based on the fatigue strength in consideration of repeated loads such as torsion, bending, tension / compression applied to each coil spring 7 during cutting. Is set. The position of the joint is preferably a relative position of 180 degrees in the circumferential direction of both ends 10 and 10 of the coiled spring 7 in consideration of the torsional moment.
Here, when the coiled spring 7 is long (for example, 1 m), a coil in which hard abrasive grains 5 such as diamond are fixed when connecting both ends of the wire rope 3 to form a loop in a later process. Therefore, it is necessary to select a length of the coiled spring 7 suitable for the connection method.
Thereby, the some coiled spring 7 is connected continuously for every predetermined length.

Next, as shown in FIG. 1a, a plurality of continuously connected coiled springs 7 are covered with a covering layer 4 made of synthetic resin or rubber over the entire length of the wire rope 3 wound around, The coiled spring 7 is embedded in the coating layer 4. The hard abrasive grains 5 fixed to the coil spring 7 are buried in the coating layer 4 and are hardly visible from the outside. FIG. 1 c shows the best state of the cutting blade 6 and the coating layer 4 when the wire saw 1 is used. The material for forming the covering layer 4 is preferably a synthetic resin or rubber, but is not necessarily limited as long as it is made of a material having elasticity and toughness and excellent heat resistance.

5a and 5b, the wire rope 3 was cut to an arbitrary length, and the coiled springs 7 and 7 at both ends 3a and 3b of the cut wire rope 3 were extracted and extracted. The sleeve 12 is inserted into the outer peripheral surfaces 11a and 11b of the wire rope 3 corresponding to the length, and both ends 3a and 3b of the wire rope 3 and the sleeve 12 are fastened together by fastening means (not shown) to form a loop shape. The The material of the sleeve 12 is preferably made of iron. This avoids the difficulty of cutting the coiled spring 7 to which the hard abrasive grains are fixed in advance, as in the case of a long coiled spring. Moreover, the connection part of the wire rope 3 becomes strong.
For this reason, the wire saw 1 in FIG. 1a with a long useful life and low manufacturing cost can be obtained.

Furthermore, as shown in FIG. 6 a, a modification of the embodiment of the present invention is that the wire rope 3 is cut to an arbitrary length, and the coiled spring 7 is formed from both ends 3 a and 3 b of the cut wire rope 3. 7 are compressed in the longitudinal direction of the wire rope 3 to expose the wire ropes 3 at both ends 3a and 3b, and as shown in FIG. 6b, both ends 3a and 3b of the exposed wire rope 3 are knitted together and connected. As shown in FIG. 6 c, the compression of the coiled springs 7, 7 is released, and the coiled springs 7, 7 are moved to the braided portion 30. Thereby, the braided portion 30 of the wire rope 3 is strong, and the coiled spring 7 is wound over the entire length of the wire rope 3, and the followability to bending and twisting of the wire saw 1 in FIG. 1a is increased.
For this reason, the wire saw 1 in FIG. 1 a having a good cutting workability and a long service life can be obtained.

In another embodiment of the wire saw of the present invention, as shown in FIGS. 3 a and 3 b, the wire saw 20 includes a wire rope 3 formed by twisting wire strands 2, and a total length of the wire rope 3. A covering layer 4 made of a synthetic resin or rubber and a wire rope 3 are continuously connected and wound every predetermined length, and a cutting blade 23 made of hard abrasive grains 5 is formed on the outer peripheral surface 22. It consists of a plurality of coiled springs 21 that are fixed and the cutting blade 23 is embedded in the coating layer 4 and whose cut surface is semi-elliptical.

Next, as shown in FIGS. 3a and 3b, a semi-elliptical divided equivalent surface 22 of the outer peripheral surface of the coiled spring 21 having a predetermined length in which the cut surface shape of the coiled spring 21 forms a semi-elliptical shape. The cutting blade 23 is fixed by brazing using a hard solder 9 in a predetermined region including Thereby, it has the characteristic that the effective length of the cutting-blade 23 which contacts a to-be-cut object is long compared with a cut surface shape is circular and an ellipse, and cutting efficiency improves more.
The cutting blade 23 is preferably formed from hard abrasive grains 5 such as diamond and borazon. Moreover, as shown in FIG. 3 b, the thickness 23 a of the layer of the cutting blade 23 to be formed is preferably one hard abrasive grain 5. Further, in consideration of the connection between the coiled springs 21 by welding or brazing, or the cutting of the coiled spring 21 at a predetermined length when the wire rope 3 is connected, both ends 21a in the axial direction of the coiled spring 21; It is desirable that the hard abrasive 5 is not fixed to the joint portion 24 to be welded or brazed 21b.

As a specific method of brazing using the hard braze 9, first, a flux and a powdery brazing material are kneaded and uniformly applied to a predetermined region 22 on the outer peripheral surface of the coiled spring 21. Before the brazing material layer dries, the hard abrasive grains 5 are sprayed and pushed to embed the hard abrasive grains 5. Next, the coiled spring 21 is put into a furnace (vacuum furnace), the brazing material is melted, and the hard abrasive grains 5 are fixed.
The brazing method using the hard brazing 9 is preferably brazing in a vacuum furnace, but there are various methods such as brazing using combustion heat, electricity, light, etc. as a heat source, ultrasonic brazing, metallizing method, etc. It can be set according to the abrasive and the material of the coiled spring 21 and the required quality (strength).
The brazing material in brazing using the hard brazing 9 is preferably a silver brazing or copper brazing containing Ti, but in the case of silver brazing, Ag—Cu—Ni brazing, and in the case of ceramics, Ag—Cu—Ti brazing. For copper brazing, Cu—Mn—Ni brazing or the like is used.
The material of the coil spring 21 can be selected from spring steel, hard steel, piano wire, stainless steel, etc. depending on the application.

As shown in FIG. 3 a, the cut surface shape of the coiled spring 21 is a semi-elliptical shape, and the long axis of the cut surface shape is configured to be parallel to the longitudinal direction of the wire rope 3. As a result, the spring constant is high, the amount of deflection of the spring is small, and the displacement margin becomes larger with respect to the tensile force in the longitudinal direction acting on the coating layer 4, compared to a coiled spring having a circular or square cut surface. The amount of displacement of the coating layer 4 is minimized. Thereby, the damage of the coating layer 4 is prevented, rusting, corrosion, and breakage of the wire rope 3 are avoided, and the service life is improved.

Next, as shown in FIG. 4, both ends 24 and 24 of a plurality of coiled springs 21 having a predetermined length are brought into line contact with one end 21a or the other end 21b of the adjacent coiled springs 21 to form contact lines. And connected by welding or brazing.
Laser welding is most suitable industrially as the welding method. Further, preferably, the hard abrasive grains 5 are not fixed to the part 24 connected by welding or brazing. In this case, if the hard abrasive grains (diamond) 5 are fixed to the connected portion 24, there is a possibility that the laser beam is irradiated to the diamond and the diamond explodes and cannot be welded. Also, the welded joint is linear, and the specifications such as the length of the joint are based on the fatigue strength in consideration of repeated loads such as torsion, bending, tension / compression applied to each coil spring 21 during cutting. Is set. The position of the joint is preferably a relative position of 180 degrees in the circumferential direction of both ends 24 and 24 of the coiled spring 21 in consideration of the torsional moment.
Here, when the coiled spring 21 is long (for example, 1 m), when connecting both ends of the wire rope 3 to form a loop shape in a later process, a coiled shape to which hard abrasive grains such as diamond are fixed. Since it is difficult to cut the spring 21, it is necessary to select a length of the coiled spring 21 suitable for the connection method.
Thereby, the plurality of coiled springs 21 are continuously connected every predetermined length.

Next, as shown in FIG. 3a, a plurality of continuously connected coiled springs 21 are covered with a covering layer 4 made of synthetic resin or rubber over the entire length of the wire rope 3 wound around, The coil spring 21 is embedded in the coating layer 4. The hard abrasive grains fixed to the coiled spring 7 are buried in the coating layer 4 and are hardly visible from the outside. FIG. 3 c shows the best state of the cutting blade 23 and the covering layer 4 when the wire saw 20 is used. The material for forming the covering layer 4 is preferably a synthetic resin or rubber, but is not necessarily limited as long as it is made of a material having elasticity and toughness and excellent heat resistance.

Further, as shown in FIGS. 5a and 5b, the wire rope 3 is cut to an arbitrary length, and instead of the coiled springs 7 and 7 at both ends 3a and 3b of the cut wire rope 3, FIG. The semi-elliptical coiled springs 21 and 21 are extracted, and a sleeve 12 is inserted into the outer peripheral surfaces 11a and 11b of the wire rope 3 corresponding to the extracted length, and both ends 3a and 3b of the wire rope 3 and the sleeve 12 are They are fastened together by fastening means (not shown) to form a loop shape. The material of the sleeve 12 is preferably made of iron. This avoids the difficulty of cutting the semi-elliptical coiled spring 21 in FIG. 4 in the middle instead of the coiled spring 7 to which hard abrasive grains are fixed in advance as in the case of a long coiled spring. It is done. Moreover, the connection part of the wire rope 3 becomes strong.
For this reason, the wire saw 20 in FIG. 3a with a long useful life and cheaper manufacturing cost can be obtained.

Furthermore, a modification of another embodiment of the present invention is shown in FIG.
The wire rope 3 is cut to an arbitrary length, and instead of the coiled springs 7 and 7 from both ends 3a and 3b of the cut wire rope 3, semi-elliptical coiled springs 21 and 21 in FIG. The wire rope 3 at both ends 3a and 3b is exposed by being compressed in the longitudinal direction 3 and the ends 3a and 3b of the exposed wire rope 3 are knitted and connected to each other as shown in FIG. As shown in FIG. 6c, the compression of the semi-elliptical coil springs 21 and 21 in FIG. 4 is released instead of the coil springs 7 and 7, and the coil springs 7 and 7 are released. Instead, the semi-elliptical coil springs 21, 21 in FIG. 4 are moved to the braided portion 30. Thereby, the braided portion 30 of the wire rope 3 is strong, and instead of the coiled spring 7, the semi-elliptical coiled spring 21 in FIG. 4 is wound around the entire length of the wire rope 3, and in FIG. The followability to bending and twisting of the wire saw 20 is increased.
For this reason, the wire saw 20 in FIG. 3 with a good cutting workability and a long service life can be obtained.

The wire saw of the present invention is not necessarily limited to the loop-shaped form described above, and is connected to a driving device such as a hydraulic cylinder that faces each of both ends in the longitudinal direction of the wire saw depending on the application. In addition, the wire saw can be reciprocated to cut the workpiece.

The cutting surface shape of the coil spring is elliptical or semi-elliptical, so that the effective contact length of the cutting blade with the workpiece is large and the cutting efficiency is high. The spring constant is high, the amount of deflection is small, damage due to displacement of the coating layer, rusting and breaking of the wire rope can be prevented. It can be widely used for cutting concrete structures, stones, and steel structures.

FIG. 1a is a cross-sectional view of one embodiment of the wire saw of the present invention. FIG. 1 b is a cross-sectional view of a cutting blade constituting an embodiment of the wire saw of the present invention. FIG. 1c is a cross-sectional view of the cutting blade and the coating layer when the wire saw according to an embodiment of the present invention is used. It is a fragmentary perspective view of the coiled spring which constitutes one embodiment of the wire saw of the present invention. FIG. 3a is a cross-sectional view of another embodiment of the wire saw of the present invention. FIG. 3b is a cross-sectional view of a cutting blade constituting another embodiment of the wire saw of the present invention. FIG. 3 c is a cross-sectional view of the cutting blade and the coating layer when using another embodiment of the wire saw of the present invention. It is a fragmentary perspective view of the coil-shaped spring which comprises other embodiment of the wire saw of this invention. FIG. 5a is a conceptual diagram of a loop forming portion of an embodiment of the wire saw of the present invention. FIG. 5b is a conceptual diagram of a loop forming portion of an embodiment of the wire saw of the present invention. FIG. 6 a is a conceptual diagram of a modified example of the loop forming portion of one embodiment of the wire saw of the present invention. FIG. 6 b is a conceptual diagram of a modified example of the loop forming portion of the embodiment of the wire saw of the present invention. FIG. 6 c is a conceptual diagram of a modification of the loop forming portion of the embodiment of the wire saw of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wire saw 2 Wire strand 3 Wire rope 3a, 3b Both ends of a wire rope 4 Coating layer 5 Hard abrasive
6 Cutting blade 6a Thickness of cutting blade
7 Coiled spring 8 Outer peripheral surface
9 Hard solder 10 Both ends 11a and 11b of coiled springs Outer peripheral surface 12 of wire rope Sleeve 20 Wire saw 21 Coiled spring 22 Split equivalent surface 23 Cutting blade 23a Cutting blade thickness 24 Both ends of coiled spring 30 Braided portion

Claims (6)

A wire rope constructed by twisting wire strands;
A coating layer made of synthetic resin or rubber coated over the entire length of the wire rope;
The wire rope is continuously connected and wound every predetermined length, a cutting blade made of hard abrasive is fixed to the outer peripheral surface, the cutting blade is embedded in the coating layer, and the cut surface shape is elliptical A wire saw comprising a plurality of coiled springs having a shape or a semi-elliptical shape. The wire saw according to claim 1, wherein the hard abrasive grains are fixed to the outer peripheral surface of the coil spring by brazing using a hard braze. Both ends of each of the plurality of coiled springs are connected to one end or the other end of the adjacent coiled springs by welding or brazing, and the coiled springs are continuous with each other in the longitudinal direction of the wire rope. The wire saw according to claim 1 to be connected. The wire saw according to claim 1, wherein a major axis of the cut surface shape is parallel to a longitudinal direction of the wire rope. The wire rope is cut to an arbitrary length,
The coiled springs at both ends of the cut wire rope are extracted, and a sleeve is inserted through the outer peripheral surface of the wire rope corresponding to the extracted length,
The wire saw according to claim 1, wherein the both ends of the wire rope and the sleeve are integrally fastened by fastening means to form a loop shape. The wire rope is cut to an arbitrary length,
The coiled spring is compressed in the longitudinal direction of the wire rope from both ends of the cut wire rope to expose the wire rope at both ends, and the both ends of the exposed wire rope are knitted together and connected. Formed in a loop shape,
The wire saw according to claim 1, wherein the compression of the coiled spring is released, and the coiled spring is moved to the braided portion.

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