JPH11262815A - Wire saw - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrict the fluctuation in cutting speed and electric current consumption, which is caused by the difference between the materials to be cut and prolong tool life by reducing the resistance when contacting a workpiece in cutting composite material such as reinforced concrete. SOLUTION: A wire saw 10 comprises many ring-shaped main grinding members 14 having an abrasive grain section 13 on the outer periphery of its base metal 12 arranged on a wire rope 11 at regular intervals, and an auxiliary grinding member 15 having functions different from those of the main grinding members 14 and diameter smaller than those of the main grinding members 14, and a spacer section 16 including no abrasive grain alternately arranged along the longitudinal direction of the wire rope 11.

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 hard materials such as concrete and stone.

[0002]

2. Description of the Related Art Circular saws, chain saws, wire saws, and the like have been used as tools for cutting hard materials such as concrete and stone. Among these cutting tools, wire saws are simpler in equipment, relatively inexpensive, have less noise and vibration than circular saws and chainsaws, and can be cut underwater, so they can be used for buildings and bridges. Widely used in demolition work and various civil engineering and construction works.

A conventional wire saw, as shown in FIG.
An annular grinding member 52 having an abrasive portion 51 formed by an electrodeposition method or a metal sintering method on an outer periphery of a base metal 50 is disposed on a steel wire rope 53 at regular intervals. In this structure, the end portions are connected to form an endless loop, and the outer periphery of the wire rope 53 between the grinding members 52 is covered with a coating material 54 such as rubber or synthetic resin to form a spacer portion 55. A part of the wire saw is wound around the object to be cut, the wire saw is rotated by a driving motor or the like, and the object to be cut is gradually ground by the grinding member 52 to perform a cutting operation.

[0004] However, such a wire saw has a problem that when cutting a prism made of concrete or the like, the spacer portion 55 of the wire saw hits a corner portion of an object to be cut and is easily worn. When the spacer portion 55 is worn, the wire rope 53 is exposed, and the wear of the wire rope 53 itself progresses, so that not only the life of the wire saw is significantly reduced, but also the wire rope 53 may be broken during the cutting operation.

[0005] A wire saw for solving such a problem is disclosed in Japanese Patent Application Laid-Open No. 3-281117. This wire saw mixes and disperses hard particles such as aluminum oxide and silicon carbide into the spacer part and improves the wear resistance of the entire spacer part, thereby reducing the wear of the spacer part by hitting the corner of the workpiece. It is intended.

[0006]

However, when cutting a composite material such as reinforced concrete, FIG.
Or the wire saw described in Japanese Patent Application Laid-Open No. 3-281117, the cutting speed and the current consumption of the driving motor may vary greatly during the cutting operation. This is because the sharpness is reduced when the wire saw cuts a reinforcing bar or the like in the reinforced concrete, and such reduced sharpness causes a reduction in cutting speed and an increase in power consumption.

That is, since the most suitable abrasive grain for the object to be cut differs depending on the material of the object to be cut, when a grinding member cuts a composite material such as reinforced concrete using a wire saw having a single property, The cutting speed and current consumption fluctuate greatly due to the difference in the material of the cut object, resulting in a reduction in the efficiency of the entire cutting operation, an increase in energy consumption, a reduction in tool life, and the like.

In the case of the wire saw described in Japanese Patent Application Laid-Open No. 3-281117, it is possible to extend the life of the tool by suppressing the wear rate of the spacer portion when cutting the corner portion of the workpiece. However, since only a single abrasive layer is used to cut an object to be cut, there is the above problem when cutting a composite material such as reinforced concrete. In addition, there is a problem that the flexibility of the wire saw is lost, and it becomes difficult to cut a deformed object having a complicated shape.

Further, since hard particles are dispersed throughout the spacer portion to enhance wear resistance, as the cutting area of the object to be cut increases, the formation of the cooling water supply passage and the chip discharge passage in the cutting portion is increased. As a result, friction between the wire saw and the object to be cut increases, cutting speed decreases, current consumption increases, and the like, as well as adverse effects such as abnormal wear and damage of the wire saw itself.

On the other hand, as a wire saw suitable for cutting reinforced concrete, a wire saw described in Japanese Utility Model Publication No. 7-42575 is known. In this wire saw, in addition to a large number of diamond beads, in addition to a large number of diamond beads, tungsten carbide, carbide particles such as boron nitride are dispersed and embedded in a binder, and a cutting tool for cutting a rebar having the same diameter as the diamond beads is adjacent to the wire saw. According to this wire saw, concrete is cut by diamond beads, and cutting of rebar is performed by a cutting tool for cutting rebar.
It is said that cutting of a reinforced concrete structure can be performed efficiently.

However, in this wire saw, since the cutting tool for cutting the reinforcing bar has the same diameter as the diamond bead for cutting the concrete, the contact resistance that the wire saw receives intermittently with the object to be cut is large. There is a disadvantage that the resistance increases due to contact between the cutting tool for cutting and concrete. Furthermore, since the cutting speed of the reinforcing bar at the time of cutting is lower than the cutting speed of concrete, the reinforcing bar remains on the surface of the cut portion in a stepped state, and the number of vertical vibrations of the wire saw generated by contacting the step increases, and the wire becomes There is a disadvantage that it is easily damaged.

The problem to be solved by the present invention is that when cutting a composite material such as reinforced concrete, it is possible to suppress fluctuations in the cutting speed and current consumption due to the difference in the material of the object to be cut, and to reduce the time required for contact with the object to be cut. The purpose is to reduce tool resistance and vibration to improve tool life.

[0013]

According to the present invention, there is provided a wire saw in which a large number of first grinding members and second grinding members having different grinding functions are alternately arranged, and the outer diameter of the second grinding member is set to the above-mentioned value. The outer diameter of the first grinding member is smaller than that of the first grinding member.

By alternately arranging the first grinding members and the second grinding members having different grinding functions, it becomes possible to efficiently perform a cutting operation of a composite material comprising a plurality of types of constituent materials. . In other words, if the first grinding member and the second grinding member each contain grinding abrasive grains suitable for cutting various materials constituting the composite material, it is possible to cope with the constituent material with which the wire saw abuts during the cutting operation. Since the cutting is performed mainly by the appropriate one of the first grinding member and the second grinding member, fluctuation in sharpness during the cutting operation is reduced, work efficiency is improved, and energy consumption is improved. Can be reduced.

Further, by arranging the second grinding member between the first grinding members, it is possible to suppress wear of the spacer portion when cutting a corner portion of the object to be cut. And tool life is extended. In this case, during the cutting operation, since the spacer portion wears earlier than the second grinding member, even if the cutting area increases, it is necessary to secure the cooling water supply path and the chip discharge path in the cutting portion. Thus, a reduction in cutting speed and an increase in current consumption can be suppressed, and abnormal wear and damage of the wire saw itself can be prevented.

Further, since the outer diameter of the second grinding member is made smaller than the outer diameter of the first grinding member, the resistance and the vertical vibration when the second grinding member comes into contact with the workpiece are reduced. Is prevented from being damaged.

Here, as the second grinding member, a plurality of grinding portions having different types and configurations of grinding grains can be arranged along the body length direction. Accordingly, the second grinding member can cut a plurality of types of objects to be cut, and thus cuts a composite material having three or more types of constituent materials in addition to the grinding function of the first grinding member. Also in this case, the cutting operation can be performed efficiently.

The abrasive grains for the first and second grinding members can be selected from diamond particles, silicon carbide particles, and aluminum oxide particles. Diamond particles are suitable for cutting concrete, stone, building materials, etc., silicon carbide particles are suitable for cutting metals, resins, etc., and aluminum oxide particles are suitable for cutting steel, etc. By using this, a grinding member suitable for the material of the object to be cut can be obtained.

Further, rubber or synthetic resin can be used as the base material of the second grinding member. When a rubber is used as the base material, a grinding member having excellent flexibility and adhesion is obtained, and when a synthetic resin is used, a grinding member having excellent rigidity and abrasion resistance is obtained.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partially cutaway sectional view showing the wire saw of the first embodiment.

The wire saw 10 of the present embodiment includes a base 12
A large number of annular first grinding members (hereinafter, referred to as main grinding members) 14 having an abrasive portion 13 on the outer periphery of the wire rope 11 are arranged at regular intervals on the wire rope 11. A second grinding member (hereinafter, referred to as an auxiliary grinding member) 15 having a different grinding function from the main grinding member 14 and having a smaller diameter than the main grinding member 14 and a spacer portion 16 containing no abrasive grains are provided on the outer periphery. The ropes 11 are arranged alternately along the longitudinal direction. Here, the abrasive grains 13 of the main grinding member 14 have a structure in which diamond particles are dispersed in a metal sintered body.
Reference numeral 5 denotes a structure in which silicon carbide particles are dispersed in rubber, and the spacer portion 16 is formed of rubber.

With such a configuration, the auxiliary grinding member 15 has a different grinding function from the main grinding member 14, and the main grinding members 14 having different grinding functions from each other.
In addition, since the cutting operation can be performed by the auxiliary grinding member 15, the entire wire saw 10 can efficiently perform the cutting operation of a plurality of types of composite materials.

Therefore, when cutting a composite material such as reinforced concrete, the cutting is performed mainly by the appropriate one of the main grinding member 14 or the auxiliary grinding member 15 corresponding to the constituent material with which the wire saw 10 contacts. Therefore, the fluctuation of sharpness during the cutting operation is reduced. That is, when cutting reinforced concrete using the wire saw 10,
Since the cutting of the concrete portion is performed by the main grinding member 14 and the cutting of the reinforcing bar portion is performed by the auxiliary grinding member 15, fluctuations in sharpness during the cutting operation are reduced, work efficiency is improved, and energy consumption is reduced. .

FIG. 2 is a graph showing the relationship between the cutting area during cutting and power consumption when reinforced concrete is cut using the wire saw 10 shown in FIG. 1 and the conventional wire saw shown in FIG. As shown in the figure, in the case of the conventional wire saw, the power consumption fluctuates greatly during the cutting operation, and the power consumption increases as the cutting area increases. That is, when reinforced concrete is cut with a conventional wire saw, the sharpness is reduced each time the wire saw cuts the reinforced portion, and the power consumption is increased accordingly. Also, it can be seen that the power consumption increases as the cutting operation progresses.

On the other hand, when the reinforced concrete is cut by the wire saw 10, the increase in power consumption when the wire saw cuts the reinforced portion is extremely small as compared with the conventional wire saw, and the power consumption increases even when the cutting area increases. You can see that he did not. As described above, when the reinforced concrete is cut using the wire saw 10, the fluctuation of the sharpness during the cutting operation is small, the fluctuation of the power consumption is also small, and the working efficiency is improved, and the power consumption can be reduced.

Since the outer diameter of the auxiliary grinding member 15 is smaller than the outer diameter of the main grinding member 14, the auxiliary grinding member 15 does not come into contact with the concrete, and the wire saw 10 intermittently contacts the object to be cut. The received contact resistance does not increase. In addition, the number of vertical vibrations of the wire saw 10 caused by contacting the reinforcing bar remaining on the surface of the cut portion at the time of cutting does not increase.

Further, in the wire saw 10, as shown in FIG. 3, the spacer portion 16 containing no abrasive grains is worn earlier than the auxiliary abrasive member 15 during the cutting operation.
A recess 16a is formed between the main grinding member 14 and the auxiliary grinding member 15, and the recess 16a functions as a cooling water supply path and a chip discharge path. An increase in current consumption can be suppressed, and abnormal wear and damage of the wire saw 10 can be prevented.

Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 4 is a partially cutaway sectional view showing the wire saw of the second embodiment.

The wire saw 20 according to the present embodiment has a structure in which the main grinding member 22 is attached to the outer periphery of the wire rope 21 between the main grinding members 22.
The auxiliary grinding members 26 and the spacer portions 23 having smaller diameters are alternately arranged along the longitudinal direction of the wire rope 21. The auxiliary grinding member 26 is formed by arranging a plurality of grinding portions 24 and 25 having different types of grinding grains along the body length direction.

Here, the main grinding member 22 has a structure in which diamond particles are dispersed in a metal sintered body, and the grinding portion 24 of the auxiliary grinding member 26 has a structure in which diamond particles are dispersed in rubber. The grinding portion 25 has a structure in which silicon carbide particles and aluminum oxide particles are dispersed in rubber, and the spacer portion 23 is formed of rubber.

According to the wire saw 20 of the present embodiment, in addition to the effect of the wire saw 10 of the first embodiment, the auxiliary grinding member 26 is provided with the grinding portions 24 and 25 having different grinding functions, so that the main grinding member 22 is provided. In addition to the grinding function of, even when there are three or more types of composite material,
The cutting operation can be performed efficiently.

In the wire saws 10 and 20 of the above embodiment, the spacer portions 16 and 23 and the auxiliary grinding members 15 and 2 are used.
Rubber is used as the base material that composes 6, so it is excellent in flexibility of wire saw, adhesion to wire rope, and adhesion to workpiece, but uses synthetic resin instead of rubber When a synthetic resin is used, the wire saw is excellent in rigidity and abrasion resistance.

Although the wire saws 10 and 20 are suitable for cutting reinforced concrete, the present invention is not limited to these embodiments, and thus constitutes a main grinding member, an auxiliary grinding member, and a spacer portion. By appropriately selecting and combining the abrasive grains to be contained in the base material, the main grinding member and the auxiliary grinding member according to the material of the object to be cut, the cutting work of various types of composite materials is efficiently performed. Will be able to do it.

[0034]

According to the present invention, the following effects can be obtained.

(1) By disposing a second grinding member having a different grinding function from that of the first grinding member between the first grinding members, the first grinding member can be made to correspond to the constituent material with which the wire saw contacts.
The cutting is performed mainly by the appropriate one of the grinding member and the second grinding member, so that the variation in sharpness during the cutting operation is reduced, the working efficiency is improved, and the energy consumption is reduced. Further, by making the outer diameter of the second grinding member smaller than the outer diameter of the first grinding member, resistance and vertical vibration when the second grinding member comes into contact with the workpiece are reduced, and wire breakage is prevented. Is prevented.

(2) By arranging a plurality of grinding portions having different types of abrasive grains along the body length direction of the second grinding member, the second grinding member can be provided with a plurality of types of abrasive grains. Since the cut object can be cut, the cutting operation can be efficiently performed even when cutting a composite material having three or more types of constituent materials in addition to the grinding function of the first grinding member.

(3) As the abrasive grains of the first and second grinding members are selected from diamond particles, silicon carbide particles, and aluminum oxide particles and used, they are suitable for the material of the workpiece. A ground member can be obtained.

(4) By using rubber or synthetic resin as the base material constituting the second grinding member, it meets the required characteristics of the wire saw such as flexibility, adhesion, rigidity, and abrasion resistance. A ground member can be configured.

[Brief description of the drawings]

FIG. 1 is a partially cutaway sectional view showing a wire saw of a first embodiment.

FIG. 2 is a graph showing a relationship between a cutting area and power consumption in a cutting operation using the wire saw of the first embodiment and a conventional wire saw.

FIG. 3 is a partially cutaway sectional view showing a state after use of the wire saw of the first embodiment.

FIG. 4 is a partially cutaway sectional view showing a wire saw according to a second embodiment.

FIG. 5 is a partially cutaway sectional view showing a conventional wire saw.

[Explanation of symbols]

 10,20 wire saw 11,21 wire rope 12 base metal 13 abrasive part 14,22 main grinding member (first grinding member) 15,26 auxiliary grinding member (second grinding member) 16,23 spacer part 16a recess 24 , 25 grinding unit

Claims (4)

[Claims] A first grinding member and a second grinding member having different grinding functions;
A wire saw in which a large number of grinding members are alternately arranged, wherein the outer diameter of the second grinding member is smaller than the outer diameter of the first grinding member. 2. The wire saw according to claim 1, wherein the second grinding member includes a plurality of grinding portions having different types of grinding abrasives arranged along a body length direction. 3. The wire saw according to claim 1, wherein the abrasive grains of the first grinding member and the second grinding member are selected from diamond particles, silicon carbide particles, and aluminum oxide particles. . 4. The base material constituting the second grinding member,
The wire saw according to claim 1, wherein the wire saw is a rubber or a synthetic resin.