JPH0524413Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a wire saw used for cutting stones, concrete, etc.

[Prior art] A grinding member whose surface is dotted with hard abrasive particles is formed in the shape of a bead on the outer periphery of a wire rope, and is moved along the length of the wire rope to cut objects such as stone or concrete. There is a wire saw that does this. This type of wire saw is widely used because the equipment and cost are relatively low and it can cut with good dimensional accuracy.

[Problems to be solved by the invention] In conventional wire saws, grinding members are provided on the surface of the wire rope at predetermined intervals, and rubber sleeve members are provided between the grinding parts to cover the wire rope. Since the sleeve member and the grinding member or the wire rope are not bonded to each other, the grinding member may rotate prematurely, causing damage to the rope. Furthermore, since water is used for cooling and removing shavings during cutting, there is a problem in that the wire rope rusts and the wire rope can be cut in a relatively short period of time.

[Means for solving the problem] In order to prevent damage and rusting of the wire rope, the present invention has the following configuration: That is, the wire saw of the present invention is characterized in that grinding members having hard particles scattered on the surface layer are provided at intervals on the outer surface of the wire rope, rubber sleeve members that cover the wire rope are provided at the intervals between the grinding members, and the inner surface of the sleeve member and the surface of the wire rope, and the sleeve member and at least both end faces of the grinding member are bonded with a vulcanizing adhesive for bonding rubber to metal.

[Operation] The abrasive members provided on the wire rope at predetermined intervals are moved while being pressed against the object to be cut, thereby cutting the object. Since the surface of the wire rope and at least both end surfaces of the grinding member are firmly bonded to the rubber sleeve member, early rotation of the grinding member is prevented, and rusting due to water is also prevented. Furthermore, the rubber enters between the grinding member and the wire rope during molding and vulcanization, thereby preventing rotation of the grinding member.

[Example] The present invention will be specifically explained in detail with reference to Examples below, but the present invention is not limited thereto.

FIG. 1 is a diagram showing an embodiment of a wire saw according to the present invention, and this wire saw 1 has a rubber sleeve member 2 and a grinding member 3 in which abrasive particles are embedded in a metal matrix. They are arranged alternately on the outer surface of the wire rope 4 at intervals.
As the granular abrasive 5, diamond grains, carborundum grains, etc. are used. This abrasive material 5 is scattered in a metal matrix 6, and its particle size, type, and degree of concentration are appropriately selected depending on the conditions of use. The rubber sleeve member 2 is formed to have approximately the same diameter as the grinding member 3 or a slightly smaller diameter. Note that the abrasive material 5 is buried so as to protrude beyond the rubber surface of the sleeve member.

The wire rope 4 is usually made of stainless steel (Sus304).
Generally, the wire rope is made by inserting both rope ends into a short copper tube from both sides, and crimping the short tube and the wire rope by caulking the short tube.
It becomes endless. However, in this endless method, the diameter of the wire becomes thicker at the caulked portion, which may cause problems when installing the rubber sleeve member 2 or the grinding member 3 at this portion, and stress at the end of the steel end tube. Since concentration may cause the wire rope to break, it is more preferable to make the wire rope endless by connecting the ends of the wire as shown in FIG. That is, as shown in Fig. 3, for example, all the cores are matched to prevent the wire diameter from increasing, first the core 7 is matched at the right end, and the six steel cords 8 are distributed at a pitch of, for example, 40 mm. Connect with others. in this case,
If the three steel cords a, c, and e of the six steel cords 8 are brought together at a farther distance, and the other three wires b, d, and f are brought together closer together, the friction will increase. It is preferable to do so. In this case, the length of the joint from the end of the core 7 to the steel cord a is 240 mm.

When cutting an object such as stone, water is used for heat removal and removal of cuttings, but if this water comes into contact with the steel cord 8 forming the wire rope 4, it is undesirable because it will lead to rusting. For this reason,
It is preferable that the rubber sleeve member 2 and the grinding member 3 and the sleeve member 2 and the steel cord 8 be bonded with adhesive. As the adhesive used for the bonding, an adhesive that can more firmly bond vulcanized rubber and metal is preferably used. Examples of the adhesive include chlorinated rubber adhesives containing chlorinated rubber as a main material and hydrochloric acid rubber adhesives containing hydrochloric acid rubber as a main material, among which the former is more preferably used.

Chlorinated rubber adhesives are made by dissolving chlorinated rubber in toluene or other solvents together with auxiliary agents such as polychloroprene, nitrile rubber, and polyisocyanate.A typical example is Chemlock #220.
(Chemlok 220) [trade name manufactured by Lord Chemical Products]. When using Chemlock #220, it is preferable to use a glue containing a phenolic resin as a main ingredient as an undercoat to further improve the adhesive strength. The phenolic resin-based paste is a thermosetting phenolic resin alone, or a phenolic resin and a small amount of a modified resin such as a polyacetal resin dissolved in a solvent such as methyl ethyl ketone. Typical examples are: An example of this is Chemlok 205 [trade name manufactured by Lord Chemical Products Co., Ltd.].

It is more preferable to form the wire rope using a steel cord whose metal surface is plated with copper, zinc, tin, etc. in order to improve the adhesion between the steel cord and the rubber member. In addition, steel wire is plated with copper and zinc and heated at high temperature.
It is even more preferable to form the wire rope 4 with a cord used as a steel cord for tires, such as a steel cord drawn by diffusing the wire, from the viewpoint of improving the adhesive force.

On the other hand, when vulcanizing rubber, a substance that improves adhesion to steel cord, such as a cobalt salt of an organic acid such as cobalt stearate, is used.
It is more preferable to mix 1 to 2 parts by weight per 100 parts by weight of rubber and perform vulcanization.

The specific blending ratio of the rubber material before vulcanization used to form the rubber sleeve member 2 is as follows.

Note that parts are expressed on a weight basis.

Natural rubber 100 parts Carbon black 70 parts Cobalt stearate 2 parts Zinc oxide 5 parts Sulfur 1.5 parts Vulcanization accelerator 2.5 parts As the vulcanization accelerator, guanidine type, thiazole type, thiuram type, etc. are usually suitably used. Vulcanization is performed, for example, at a temperature of 150° C. and a vulcanization time of 10 minutes.

In forming the wire saw 1, as the wire rope 4, a wire rope made of so-called tire steel cord, which is a steel wire plated with copper and zinc and drawn by diffusing both at high temperature, is used. On the other hand, the rubber sleeve member 2 was formed into a wire rope using the unvulcanized rubber material having the above-mentioned mixing ratio. In this case, a chemlock 220 is provided between each adhesive surface, that is, between the inner surface of the sleeve member 2 and the outer surface of the wire rope 4, and between both end surfaces of the sleeve member 2 and both end surfaces of the grinding member 3.
Using Chemlock 205 as a top coat and base coat, both were applied in a composite manner to bring each member into contact.

In addition, when the rubber sleeve member is molded and vulcanized, pressure is applied to the rubber, which causes the rubber to enter between the grinding member and the wire rope, and when using a wire saw,
Rotation of the grinding member is prevented and damage to the wire rope is reduced.

During use, the obtained wire saw shows almost no peeling at each bonded part, which occurs due to a decrease in adhesive strength, and as a result, as mentioned above, the wire saw can be used in conjunction with water and wire rope when cutting the object to be cut. This made it possible to prevent contact with the wire saws, and no rust was observed, greatly contributing to extending the life of the wire saw.

In addition, when forming the wire saw described above, both ends of the wire rope were connected by twisting as described above to create an endless structure.The strength obtained by the tensile test is shown together with the specifications of the wire rope used. It was as follows.

Tensile strength Joint part by twisting 1300Kg/piece Wire rope specifications used JIS G 3535 A3 No. A7×19 Rope diameter 4.76mm Cutting strength 1680Kg/piece [Effects of the invention] The wire saw according to the invention is constructed as described above. As a result, the wire rope used in the wire saw is unlikely to be damaged or rusted during use, making it an extremely long-lasting wire saw.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing the wire saw of the present invention;
FIG. 2 is an enlarged view of the main part, and FIGS. 3a and 3b are explanatory views of the wire rope joint. 1...Wire saw, 2...Sleeve member, 3
...Grinding member, 4...Wire rope.

Claims (1)

[Claims for Utility Model Registration] (1) Grinding members whose surface layer is dotted with hard particles are provided at multiple locations on the outer surface of the wire rope at intervals, and the wire rope is covered at the intervals between the grinding members. A wire saw characterized in that a sleeve member made of rubber is provided, and the inner surface of the sleeve member, the surface of the wire rope, and at least both end surfaces of the sleeve member and the grinding member are vulcanized and bonded with an adhesive for bonding rubber/metal. . (2) The wire rope has copper on the surface of the steel wire.
The wire saw according to claim 1, which is made of a steel cord plated with zinc and drawn by diffusing the zinc at high temperatures. (3) The wire saw according to claim 1 or 2, wherein the adhesive is a chlorinated rubber adhesive. (4) The wire saw according to any one of claims 1 to 3, wherein the wire rope is endless by connecting ends of the rope by twisting.