JPH058116A - Wire saw and its manufacture - Google Patents

Abstract

PURPOSE:To obtain a wire saw and its manufacture by which the manufacturing cost can be reduced and noise, vibration, etc., during cutting can also be reduced. CONSTITUTION:A wire saw 22 is composed of a wire rope 24, multiple beads 30 fitted at a space to each other on the outer side of the wire rope 24, and a heat-shrinking tube 32 coated closely on the outer side of the beads 30 and the wire rope 24. Also the bead 30 is composed of a cylindrical sleeve 26 and a cutting abrasive grain layer 28 formed on the outer side of the sleeve 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire saw used for cutting stone materials, concrete structures and the like, and a method for manufacturing the same.

[0002]

2. Description of the Related Art In recent years, as a means for cutting and dismantling stone materials, reinforced concrete structures such as buildings and bridges,
The cutting method using a wire saw is drawing attention.

As shown in FIG. 10, this wire saw 2 has a plurality of metal wire strands 4, which are stranded wires, fitted with a plurality of cylindrical beads 10 at predetermined intervals. Spacers 12, which are made of a flexible material such as resin or rubber, are interposed therebetween. The beads 10 are composed of a sleeve (base metal) 6 and an abrasive grain layer 8 made of diamond abrasive grains or the like formed on the outer peripheral portion of the sleeve 6. Further, the spacer 12 is for keeping the interval between the beads 10 ... And protecting the wire rope 4.
The beads 10 are attached to the wire rope 4 at predetermined intervals, and then the wire rope 4 is put into a mold and the material of the spacer 12 is injected by an injection device to be molded. .

In order to perform cutting with this wire saw 2, as shown in FIG.
After winding, it is attached to the pulley 18 of the drive device 16,
The pulley 18 is rotated to drive the wire saw 2 to 100
The workpiece 14 is cut by the abrasive grain layer 8 of the wire saw 2 by traveling at a high speed of 0 to 1800 m / min. In addition, the drive device 16 is mounted on the table 2 on which the drive device 16 is installed.
The upper part of 0 is retracted with respect to the object to be cut 14 as the cutting progresses.

[0005]

By the way, in the above-mentioned conventional wire saw 2, the spacer 12 is attached to the wire rope 4 in order to maintain the bead spacing and protect the wire rope 4, as described above. ing. Since the die and the injection device are required to apply the spacer 12 as described above, there is a drawback that the manufacturing cost of the wire rope is high. In particular, when the bead shape or the bead interval is changed, it is necessary to change the mold accordingly, resulting in a high cost. Further, since a die is used, only a wire saw having a constant bead interval can be manufactured, and the bead interval cannot be adjusted. Further, although noise and vibration are less than those of the conventional circular saw, it has been desired to further reduce noise and vibration.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a wire saw which can be manufactured at low cost and which can reduce noise, vibration, etc. during cutting, and a manufacturing method thereof.

[0007]

The invention according to claim 1 is
A wire rope and a cutting abrasive layer on the outer periphery are provided,
In a wire saw including a plurality of substantially cylindrical beads mounted on the outer peripheral portion of the wire rope at intervals, a heat-shrinkable tube is attached to a portion of the outer peripheral portion of the wire rope between the beads. It was done.

According to a second aspect of the present invention, there is provided a wire rope and a plurality of substantially cylindrical beads each having a cutting abrasive grain layer provided on an outer peripheral portion thereof and mounted on the outer peripheral portion of the wire rope at intervals. In the wire saw comprising, the outer peripheral portion of the wire rope, shock absorbers are attached to both ends of each of the beads, the outer peripheral portion of the wire rope, a portion not covered by the beads, a heat-shrinkable tube. It has been applied.

According to a third aspect of the present invention, a plurality of substantially cylindrical beads each having a cutting abrasive grain layer provided on the outer peripheral portion of the wire rope are attached to the outer peripheral portion of the wire rope at intervals, and then the wire rope is attached. A method for manufacturing a wire saw, in which a heat-shrinkable tube is attached over the entire length, and the heat-shrinkable tube is heated to bring the heat-shrinkable tube into close contact with the wire rope and the beads.

According to a fourth aspect of the present invention, a plurality of substantially cylindrical beads each having an abrasive grain layer for cutting provided on the outer peripheral portion of the wire rope are mounted at intervals, and both ends of these beads are attached. After mounting the shock absorbing material on, a heat shrink tube is mounted over the entire length of the wire rope, and the heat shrink tube is heated to bring the heat shrink tube into close contact with the wire rope, the beads and the shock absorbing material. It is a manufacturing method of a wire saw.

[0011]

In the wire saw according to the first aspect of the present invention, the heat-shrinkable tube adhered between the beads on the outer peripheral portion of the wire rope suppresses deviation of the beads during cutting and also prevents abrasion of the surface of the wire rope. . When the temperature of the wire saw rises due to friction during cutting, the heat-shrinkable tube is further shrunk by the heat to strengthen the pressure for covering the wire rope.

Further, in the wire saw according to claim 2, in addition to the function of the wire saw according to claim 1, the shock absorbing material absorbs vibration generated in the beads during cutting,
Vibration and noise generated in the wire saw during cutting can be suppressed.

Further, in the wire saw manufacturing method according to the third or fourth aspect, the heat-shrinkable tube is easily shrunk by heating so that the heat-shrinkable tube is adhered. The shrink tube is applied.

[0014]

Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 is a sectional view showing an embodiment of the wire saw according to claim 1. The wire saw 22 shown in the figure is a wire rope 2 which is a stranded wire of many metal wires.
4, a plurality of beads 30 attached to the outer peripheral portion of the wire rope at intervals, and these beads 3
0 and the heat-shrinkable tube 32 which is closely adhered to and coated on the outer peripheral portion of the wire rope 24. The beads 30 include a cylindrical sleeve 26 and the sleeve 2.
Abrasive grain layer 2 for cutting formed by fixing abrasive grains such as diamond and CBN to the outer peripheral portion of 6 by metal bond or electrodeposition
8 and the end portion of the sleeve 26 is crimped and fixed to the wire rope 24. The heat-shrinkable tube 32 is made of polyethylene resin, vinyl chloride resin, vinylidene fluoride resin, ethylene vinyl acetate resin, ethylene ethyl acrylate copolymer, ethylene propylene rubber, silicone rubber or the like.

FIG. 2 is a sectional view showing an embodiment of the wire saw according to the present invention. In the wire saw 34 shown in the figure, beads 42 formed of a sleeve 38 and an abrasive grain layer 40 for cutting are caulked and fixed to an outer peripheral portion of a wire rope 36.
6 is the same as the wire saw 22 shown in FIG. 1 in that it is covered by the heat shrinkable tube 44.
However, the difference is that impact absorbing materials are attached to both ends of the beads 42. That is, as shown in FIG.
A substantially ring-shaped impact absorbing material 46 made of hard rubber, brass, or the like is fitted to the outer peripheral portion of the crimped portion 38a of Fig. 8 with its end face in close contact with one end face of the abrasive grain layer 40 for cutting.
On the other hand, the impact absorbing material 4 is provided on the outer peripheral portion of the wire rope 36.
A substantially ring-shaped shock absorber 48 made of the same material as that of
The end surface is fitted in a state in which the end surface is in close contact with the other end surface of the abrasive grain layer 40 for cutting. Then, in this state, the outer peripheral portion is covered with the heat shrinkable tube 44.
For cutting, the abrasive grain layer 40 for cutting is used in the radial direction.
The outer peripheral portion of the is projecting outward from the outer peripheral surfaces of the shock absorbers 46 and 48.

Next, the wire saw 2 shown in FIG.
A method for manufacturing 2 will be described with reference to FIG. When manufacturing the wire saw 22, first, the plurality of beads 30 ... Are attached to the wire rope 24 at intervals. At this time, the interval between the beads 30 need not be constant.

Next, a hollow cylindrical heat-shrinkable tube 32
Are attached so as to cover the wire rope 24 to which the beads 30 ... Are attached. In this state, there is a slight gap between the inner peripheral portion of the heat shrinkable tube 32 and the outer peripheral portion of the beads 30.

Thereafter, the wire rope 24 having the heat-shrinkable tube 32 attached thereto is fed from the end portion in the axial direction (direction of arrow A in FIG. 3) at a constant speed, and the cylindrical heating space 52 of the heating furnace 50 is fed at a constant speed. To pass. Heat shrink tube 3
2 is gradually contracted in the radial direction by being heated in the heating space 52, and closely adheres to the outer peripheral portion of the wire rope 24 and the outer peripheral portion of the beads 30 without any gap. Heating space 52
The heat-shrinkable tube 32 that has passed through is cooled and solidified while being in close contact with the outer peripheral portion of the wire rope 24 and the outer peripheral portion of the beads 30 without a gap, and becomes the wire saw 22 shown in FIG. 1.

The method of manufacturing the wire saw 34 shown in FIG. 2 is the same as that of the wire saw 22 described above. After the beads 42 are attached to the wire rope 36, the shock absorber 4 is attached.
2, 6 and 48 may be mounted in the state shown in FIG. 2, then the heat shrinkable tube 44 may be mounted, and heating may be performed in a heating furnace.

According to the wire saw manufacturing method as described above, unlike the conventional wire saw, the manufacturing cost of the wire saw can be significantly reduced without requiring a mold and an injection device for manufacturing. Further, since no mold is required, it is not necessary to make the intervals between the beads constant. Therefore, the heat-shrinkable tube can be covered even if the bead spacing is somewhat uneven, and the bead spacing can be easily made positive in order to prevent co-vibration. Further, by changing the color of the tube to be coated, it is possible to indicate the performance of the beads, for example, the abrasive grain size, the application, and the like.

Further, in the wire saw of FIG. 1 manufactured by the above manufacturing method, the heat shrinkable tube 32 is provided on the outer peripheral portion of the wire rope 24 between the beads 30.
Since the surface of the wire rope 24 is protected from friction during cutting, the deviation of the beads 30 is suppressed. Furthermore, when cutting, the wire saw 22
When the temperature of the wire rope 24 becomes high, the heat-shrinkable tube 32 attached to the outer peripheral portion of the wire rope 24 shrinks due to this heat, which has the advantage of improving the supportability of the beads 32 and the protection of the wire rope 24. .

In the wire saw of FIG. 2 manufactured by the above manufacturing method, since impact absorbing materials are attached to both ends of each bead, in addition to the effect of the wire saw of FIG. The effect that the vibration of the rope 36 can be absorbed to reduce noise and vibration is obtained. The magnitude of this noise and vibration can be adjusted by changing the material of the shock absorbing material.

In the wire saws shown in FIGS. 1 and 2, the heat-shrinkable tubes 32 and 34 are coated on the surfaces of the abrasive grain layers 28 and 40, respectively. The heat-shrinkable tubes 32 and 34 coated on the surfaces of the layers 28 and 40 are immediately scraped due to abrasion with the object to be cut, and thus have no influence on the sharpness of the wire saw. Then, since the surface of the abrasive grain layer for cutting is covered with this heat-shrinkable tube, it is not necessary to consider the deterioration of the abrasive grain layer from the time of manufacturing the wire saw to the time of using the wire saw, In addition, when the wire saw is conveyed, or when the wire saw is attached to the cutting object and the cutting machine, the operator is not injured by the abrasive grain layer, and the safety is improved.

In each of the above examples, the heat-shrinkable tube is coated in a single layer, but in order to improve the adhesion to the wire rope, beads, etc., the heat-shrinkable tube is coated in a multi-layered structure of two or more layers. It is preferable to adopt a configuration.

Further, a thermoplastic material (polystyrene, polyamide, polyolefin, etc.) is provided inside the heat shrinkable tube.
It is also suitable to attach a tube made of (hereinafter referred to as "thermoplastic tube") and attach the tube to a wire rope for heat treatment. FIG. 4 shows such a thermoplastic tube 54 and a heat-shrinkable tube 5 on the outer periphery of the wire rope 24 and the beads 30 shown in FIG.
A two-layer tube composed of 6 and 6 was attached and heat-treated. During the heat treatment, the thermoplastic tube 54 is in a softened state, and is brought into close contact with the wire rope 24 by the heat shrinking tube 56 whose diameter is reduced. With such a configuration, a protective layer made of a thermoplastic material having excellent adhesion (adhesiveness) is formed under the protective layer made of the heat shrinkable tube 56, the sealing effect of the wire saw is improved, and the wire rope 26 Rust, etc. are effectively prevented.

Further, in the wire saw of FIG. 4, for example, spacers 58, 60 made of nylon, polyurethane or the like having a shape as shown in FIGS. 5 to 7 are provided between the beads 30 of the wire rope 24. 62 may be fitted. 5 shows a cylindrical spacer 58 having an interrupt in the axial direction, FIG. 6 shows a cylindrical spacer 60 having a large number of through holes 60a communicating between the inside and the outside, and FIG. 7 shows a spring-like shape. The spacer 62 is shown. FIG. 8 shows the same wire saw as in FIG.
The spacer 58 shown in FIG.
FIG. 6 is a cross-sectional view showing a state in which the heat shrinkable tube 56 is covered. In this case, the thermoplastic tube 54 has a spacer 58.
Not only does it cover the outer circumference of, but also serves as a solution during heat treatment and enters the gap between the wire rope 24 and the spacer 58 to bond both members. By fitting the spacers 58, 60, 62 between the beads 30 as described above, the irregularities on the surface of the wire saw can be reduced, and the vibration during cutting can be reduced, and
The wire rope can be more effectively protected from wear, corrosion and the like. Further, the spacers 58, 60, and 62 can be color-coded to display the bead performance, the length of the wire saw, and the like.

Further, as described above, according to the present invention, a mold is not required, so that the beads attached to the wire rope can be of various shapes, unlike the conventional beads. FIG. 9 shows a bead 64 composed of a slant cylinder sleeve 60 and a slant cylinder cutting abrasive grain layer 62 formed on the outer periphery of the sleeve 60. Such beads 6
It is also possible to easily attach the heat-shrinkable tube after attaching a predetermined number of 4 to the wire rope.

[0028]

As described above, in the wire saw according to the first aspect of the invention, the heat shrink tube is attached to the outer peripheral portion of the wire rope between the beads.
The wire rope is protected from friction and the beads are stably supported. Furthermore, when the wire saw becomes hot due to friction during cutting, the heat-shrinkable tube attached to the outer periphery of the wire rope shrinks, which improves the supportability of beads and the protection of the wire rope. Have.

Further, in the wire saw according to claim 2, in addition to the structure according to claim 1, since impact absorbing materials are attached to both ends of each bead, the effect of the wire saw according to claim 1 In addition, the effect of absorbing the vibration of the wire rope during cutting and reducing noise and vibration is provided.

According to the wire saw manufacturing method of the third aspect, since the heat-shrinkable tube is attached to the wire rope and the beads, a mold and an injection device are not required unlike the conventional wire saw. Therefore, the manufacturing cost of the wire saw can be significantly reduced, and the wire saw having an arbitrary bead interval can be manufactured in consideration of co-seismic prevention.

Further, according to the wire saw manufacturing method of the fourth aspect, in addition to the effect of the wire saw manufacturing method of the third aspect, it is possible to manufacture a wire saw having more excellent vibration proofness.

[Brief description of drawings]

FIG. 1 is a sectional view according to an embodiment of the invention described in claim 1.

FIG. 2 is a cross-sectional view according to an embodiment of the claimed invention.

FIG. 3 is an explanatory diagram related to a method for manufacturing a wire saw.

FIG. 4 is a sectional view according to another embodiment of the invention as set forth in claim 1;

FIG. 5 is a perspective view showing a shape of a spacer.

FIG. 6 is a perspective view showing a shape of a spacer.

FIG. 7 is a perspective view showing a shape of a spacer.

FIG. 8 is a cross-sectional view showing a mounted state of a spacer.

FIG. 9 is a vertical cross-sectional view showing a bead shape.

FIG. 10 is a cross-sectional view showing a conventional wire saw.

FIG. 11 is a diagram showing a usage example of the wire saw.

[Explanation of symbols]

22 wire saw 24 wire rope 28 Abrasive layer for cutting 30 beads 32 heat shrink tube 34 wire saw 36 wire rope 40 Abrasive layer for cutting 42 beads 44 heat shrink tube 46, 48 Shock absorber

Claims (4)

[Claims] 1. A wire saw comprising a wire rope and a plurality of substantially cylindrical beads provided with a cutting abrasive grain layer on the outer peripheral portion thereof and mounted on the outer peripheral portion of the wire rope at intervals. A wire saw, wherein a heat-shrinkable tube is attached to a portion between the beads on an outer peripheral portion of the wire rope. 2. A wire saw comprising: a wire rope; and a plurality of substantially cylindrical beads provided with a cutting abrasive grain layer on the outer peripheral portion thereof and mounted on the outer peripheral portion of the wire rope at intervals. A shock absorbing material is attached to both ends of each of the beads in an outer peripheral portion of the wire rope, and a heat-shrinkable tube is attached to a portion of the outer peripheral portion of the wire rope that is not covered with the beads. A wire saw. 3. A plurality of substantially cylindrical beads each having a cutting abrasive layer provided on the outer periphery of the wire rope are mounted at intervals on the outer periphery of the wire rope, and then heat is applied over the entire length of the wire rope. A method for manufacturing a wire saw, which comprises mounting a shrink tube and heating the shrink tube to bring the heat shrink tube into close contact with the wire rope and the beads. 4. A plurality of substantially cylindrical beads each having a cutting abrasive grain layer provided on the outer peripheral portion of the wire rope are mounted at intervals on the outer peripheral portion of the wire rope, and impact absorbing materials are mounted on both ends of these beads. After that, a heat-shrinkable tube is attached over the entire length of the wire rope, and the heat-shrinkable tube is heated to bring the heat-shrinkable tube into close contact with the wire rope, the beads, and the shock absorber. Manufacturing method.