JPH03281118A - Wire saw - Google Patents

Abstract

PURPOSE:To restrain the dislocation of a blade body and spacer and to prevent a wire from shortening of its life, by fixing to a wire the stopper smaller than the outer diameter of the blade body at its outer diameter in a wire saw for cutting a stone, etc. CONSTITUTION:This wire saw 1 is inserted with a blade body 3 at the specific intervals to the wire 2 which is a metal stranded wire and a spacer 4 consisting of the raw material having flexibility of resin and rubber, etc., is interposed between the blade bodies 3 by coating the wire 2. This blade body 3 is formed with the abrasive grain layer 3b to which diamond abrasive grain and CBN abrasive grain are fixed on the outer peripheral part of a sleeve 3, both ends or one end of the sleeve 3a are slightly projected from both ends of the abrasive grain layer 3b and also plural spiral grooves 3c are formed on the outer periphery of the abrasive grain layer 3b. And a stopper 11 in the outer diameter D1 smaller than that D2 of the blade body 3 is fixed to the wire 2 whenever three blade bodies 3 are inserted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a wire saw used for cutting stones, concrete structures, etc.

[Background Art] In recent years, a cutting method using a wire saw has been attracting attention as a means for cutting and dismantling stones and reinforced concrete structures such as buildings and bridges.

As shown in FIG. 6, this wire saw 1 has a wire 2, which is a twisted metal wire, and a large number of blades 3 and 3 at regular intervals.
..., and between these blade bodies 3..., the blade body 3.
This configuration includes a spacer 4 made of a flexible material such as resin or rubber in order to maintain a constant spacing and protect the wire 2. The blade body 3 includes a cylindrical sleeve 3a, and is formed on the outer periphery of this sleeve 3a.
It consists of a cutting abrasive layer 3b in which abrasive grains such as diamond or CBN are fixed by metal bonding or electrodeposition.
In order to strengthen the engagement between the blade 3 and the spacer 4, the sleeve 3
Both ends of a slightly protrude from both ends of the abrasive grain layer 3b.

The spacers 4 are generally formed by placing the blades 3 on the wire 2 at predetermined intervals and then injection molding the melted material.

In order to cut an object 5 such as stone with this wire saw I, as shown in FIG. Take it to pulley 7 (1 digit, drive this pulley 7 to rotate,
The wire saw 1 is run at a high speed of 1000 to 1800 m/min 1. Due to the dirt, the abrasive layer 3b of the wire saw 1 slides on the cut surface of the object 5 to cut it. The drive device 6 is configured to move backward on the table 8 on which it is installed relative to the object to be cut 5 as cutting progresses.
,ing.

This kind of wire saw has many advantages such as light tool weight, low noise and vibration. It is an alternative to the cutting of stone, which traditionally relied on Zakicolaso, and the demolition of concrete structures, which was conventionally done by impact destruction or blasting. I look forward to it! There are 1.

In addition, we can cut and remove underwater structures such as bridge girders made of concrete, which was previously considered impossible, and
This contributes to many points, such as simultaneous cutting of J, -, and the like when using a wire saw.

[Problem to be solved by invention] As mentioned above, the wire toe with this structure runs at high speed under a large tension, so when cutting, the wire to be cut is The contact between the object and the blade creates a large frictional resistance between the two, and a force acts between the wire and the blade to move them relative to each other in the axial direction of the wire.

For this reason, with wire saws, the spacing between the blades is kept constant,
In order to prevent these movements, a spacer is interposed between the blade bodies, but this spacer, like a dead tree, is prevented from moving by the adhesive force between the resin and other materials and the wire. When the spacer's adhesion force (=j) is no longer able to resist the force of relative movement between the wire and the blade described in +ii

This kind of misalignment of the blade and spacer is propagated to the wire saw one after another during the cutting operation, and each time the wire is worn out due to the friction caused by the inner circumferential surface of the sleeve that makes up the blade. This reduces the strength of the wire and significantly shortens the life of the wire saw.

Also, if the blade misaligns at the part where it comes in contact with the object to be cut,
The abrasive grain layer formed on the outer periphery of the blade becomes thicker than the necessary tool, shortening the life of the wire saw, and increasing the width of the wire saw's oscillation, reducing cutting efficiency. There is a risk of

[Means for Solving the Problems] The present invention has been made to solve the above-mentioned problems, and includes a cylindrical blade body in which a cutting abrasive grain layer is formed on the outer periphery of a metal stranded wire. The blades are fitted at regular intervals, and a flexible material such as molten resin or rubber is filled between these blade bodies, and after assimilation, the wire is covered,
A wire saw that uses a spacer to prevent movement of a blade body is characterized in that a stopper having an outer diameter smaller than the outer diameter of the blade body is fixed to the wire.

Possible fixing methods include caulking, welding, and bonding with a suitable adhesive.

[Function 1] According to the present invention, even when a force is exerted between the wire and the blade body to move them relative to each other due to frictional resistance when the wire comes into contact with the object to be cut during the cutting operation, This force can be suppressed by the collar fixed to the wire, and the blade and spacer can be prevented from shifting. Furthermore, by installing a stopper, it is possible to prevent misalignment of the blade or spacer from propagating to the entire wire saw.

Furthermore, outside this stopper? By setting M smaller than the outer diameter of the blade, it is possible to reduce the thickness ratio of the stopper due to contact with the object to be cut.

[Example] FIG. 1 is a sectional view showing an example of the present invention. Note that in FIG. 1, the same parts as in the conventional example shown in FIG. 6 are designated by the same reference numerals.

This wire saw 1 has a wire 2 which is a stranded metal wire.
Blade bodies 3 are fitted at predetermined intervals, and a spacer 4 made of a flexible material such as resin or rubber covers the wire 2 and is interposed between the blade bodies 3. It has a fully equipped configuration. This blade 3 has a structure in which an abrasive grain layer 3b, which is diamond abrasive grains, CBN abrasive grains, or is fixed by electrodeposition or metal bonding, is formed on the outer periphery of a cylindrical sleeve 3a. Both ends or one end protrude slightly from both ends of the abrasive grain layer 3b, and a plurality of spiral grooves 3C are formed on the outer periphery of the abrasive grain layer 3b.

In this embodiment, a cylindrical stopper 11 having an abrasive grain layer 11a provided on the outer periphery is fixed to the wire 2 every time three blade bodies 3 are fitted. This stopper 1
1 is a tubular member having a C-shaped cross section that is swaged into a cylindrical shape, and its outer diameter is smaller than the outer diameter D2 of the blade 3 and larger than the minimum outer diameter D3 of the spacer 4. Further, the distance between the stopper 11 and the blade 3 adjacent thereto is as follows:
The distance is set to be smaller than the distance L2 between adjacent blade bodies 3.

In the wire saw I having such a configuration, after installing the blade 3 and stopper 1 on the wire 2 at predetermined positions, the stopper 11 is crimped and fixed to the wire 21, and molten resin or rubber is attached to the wire 2. The spacer 4 can be obtained by injection molding a flexible material such as .

In order to cut an object 5 such as stone using the wire saw 1 having such a configuration, the wire saw 1 is wound around the object 5 as shown in FIG. 7, as in the conventional example described above. Turn,
After being connected in an endless manner, it is attached to a pulley 7 of a drive device 6, and this pulley 7 is driven to rotate, thereby causing the wire saw 1 to travel at high speed.

As a result, the abrasive layer 3b of the wire saw I slides on the cut surface of the object 5 to cut it. Note that this drive device 6
However, it is similar to the conventional example that the cutting tool moves backward on the table 8 as cutting progresses.

According to the present invention, it is possible to suppress misalignment of the blade and the spacer by using the stopper fixed to the wire for each fixed number of the blade. Further, since the misalignment between the blade and the spacer does not propagate to the entire wire saw, it is possible to prevent the wire from being worn out due to friction caused by the periphery of the blade and shortening the life of the wire saw.

Furthermore, in the present invention, since the outer diameter of the stopper is smaller than the outer diameter of the blade, it is possible to suppress wear caused by the stopper coming into contact with the object to be cut during cutting. In addition, in this embodiment, since the abrasive grain layer 11a is also formed on the outer periphery of the stopper 11, the stopper 11 may come into contact with a portion with a small radius of curvature, such as a corner, and be worn out by sliding. can be prevented.

Further, in this embodiment, the distance L1 between the stopper 11 and the blade body 3 adjacent thereto is the distance 1-2 between the adjacent blade bodies 3.
Since the pitch between the blade bodies 3 does not change much, variations in the cutting efficiency and life of the wire saw due to the provision of the stopper 11 can be minimized.

Furthermore, in this embodiment, a spiral groove 3c is formed in the abrasive layer 3b of the blade 3, and during cutting, the blade 3 rotates along the groove 3C upon contact with the object to be cut. Therefore, the outer peripheral surface of the blade body 3 is evenly cut, and uneven wear of the abrasive grain layer 3b in the circumferential direction can be prevented.

In addition, in this embodiment, a stopper 11 is provided every time three blade bodies 3 are fitted to the wire 2, but the number of blade bodies fitted between these stoppers can be set arbitrarily. In some cases, the blade and the stopper may be installed alternately. However, if the number of blade bodies fitted between the stoppers becomes too large, the effects of the present invention may not be fully exhibited, so cutting conditions etc. should be carefully considered when setting.

Further, the stopper 11 of this embodiment is fixed to the wire 2 by crimping a tubular member having a C-shaped cross section into a cylindrical shape, but as long as the above-mentioned function is achieved, there are no restrictions on the shape of the stopper or the method of fixing it. For example, a stopper that is originally cylindrical may be crimped at both ends as shown in Figure 2, or
It may be fixed to the wire by welding or gluing with a suitable adhesive.

Furthermore, in this embodiment, the outer diameter of the stopper 11 is larger than the minimum outer diameter D3 of the spacer 4, and the outer peripheral surface of the stopper 11 is exposed from the surface of the spacer 1.
Figure 3) (Total: Stopper 115)) Outside i\I]
1 is smaller than the minimum outer diameter 1 of the spacer 4. (two,
The outer peripheral surface of the stopper 11 may be buried in the spacer 4 by -4 degrees. By configuring it like this ≦),
The protruding part on the surface of the base 41-4 is missing, and the door of the stopper is damaged due to contact with the object to be cut.
+,,I'ru, Furthermore, if y'<II, δ may be set in a structure without an abrasive layer as shown in FIG.

In this case, since the process of forming an abrasive grain layer on the stopper is omitted, the manufacturing work of the wire saw can be simplified and the cost can be reduced1.Next, FIG. Other embodiments of the present invention are also shown.
・No. 5) This is an example in which the present invention is applied to a wire connection part.

This is the connected end 2a, 2b of the wire 2
A stopper 12 is fixed to the wire 2, covering the joint surface of the wire 2, and having a white abrasive layer 12a and having a longer length in the ζ-axis direction than the other stoppers 11. The other parts are the same as the embodiment shown in FIG.

The stopper 12 of this embodiment has a different structure from that of the embodiment shown in FIG. 1, and can obtain the same effect as the embodiment shown in FIG.

In this embodiment, a stopper 12 that is longer in the axial direction than the other stoppers 11 is installed at the connection part of the J1 wire 2.
In the wire saw 1 used under high tension, by fixing the wire 2, it is possible to reinforce the connecting part of the wire 2, which is considered to have the highest risk of breakage, and improve the safety of the wire saw 1. It is possible to achieve this.

Note that, like the stopper 11 in the embodiment shown in FIG.
Further, the structure may have no abrasive grain layer, or the outer peripheral surface may be buried in the spacer.

[Effects of the Invention 1] As explained above, according to the present invention, a blade having an abrasive layer of 0' is fitted onto the wire 2-, and a spacer made of a flexible material such as resin is placed between the blades. In a wire saw with an interposed configuration, by fixing a stopper to the wire, the blade and spacer can be prevented from sliding, and the blade and spacer can be propagated to the entire wire saw. ,
This prevents the wire from being worn out due to friction caused by the periphery of the blade and shortening the life of the wire saw.
, be able to.

Further, in the present invention, since the outer diameter of the stopper is smaller than the outer diameter of the blade, it is possible to suppress wear of the stopper due to contact with the object to be cut.

[Brief explanation of drawings]

1 to 5 each show an embodiment of the present invention 2, and FIG. 6 is a sectional view showing a conventional example. Further, FIG. 7 is an example of how such a wire saw is used. Wire saw wire blade, a sleeve, b a 2a abrasive layer, spacer, stopper

Claims (1)

[Claims] Cylindrical blades with a layer of cutting abrasive grains formed on the outer periphery are fitted into a stranded metal wire at regular intervals, and molten resin or the like is inserted between the blades. A wire saw in which a flexible material such as rubber is filled and solidified to cover the wire and serve as a spacer to prevent movement of the blade, wherein the stopper has an outer diameter smaller than the outer diameter of the blade. A wire saw characterized by being fixed to a wire.