JPH0526608B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a cutting tool, and particularly to a flexible rope-shaped cutting tool such as a diamond wire saw.

(Prior Art) As shown in FIG. 7, a conventional cutting tool 1 includes a plurality of cutting bodies 3 fixed to a wire rope 2 at intervals. This cutting body 3 contains abrasive grains such as fine diamond particles, and is formed into a cylindrical shape. The cutting bodies 3 are sequentially inserted through the wire rope 2 and fixed by brazing or crimping.

(Problems to be Solved by the Invention) However, in the conventional cutting tool, it was necessary to insert the cutting bodies one by one into the wire rope and fix them, so it took time and effort to manufacture the cutting tool. Furthermore, if the cutting bodies are not sufficiently fixed to the wire rope, the cutting bodies will shift and adjacent cutting bodies will come into contact with each other. Therefore, the cutting performance of the cutting tool deteriorates.

Further, when the cutting tool is fixed to the wire rope by brazing, the brazing metal penetrates into the gap between the wire ropes and hardens the wire ropes. Therefore, the wire rope may break at the boundary between the hardened portion and the unhardened portion of the wire rope. Furthermore, when using this cutting tool, there is a possibility that chips and cooling water may enter the gaps between the wire ropes, causing the wire ropes to deteriorate and break.

Therefore, the main object of the present invention is to provide a cutting tool that can be easily manufactured, has less machinability, and is less likely to break.

(Means for Solving the Problems) The present invention includes a coil body formed of a metal plate or a metal wire in a spiral shape, and abrasive grains fixed to the surface of the coil body.
This cutting tool includes a cutting body spirally formed on the outer periphery of the coil body so as to fit into the gap between the coil bodies.

(Function) The cutting body fits into the gap between the spiral coil bodies in a spiral manner.

(Effects of the Invention) According to the present invention, a cutting tool can be manufactured by spirally winding the cutting body into the gap between the spirally formed coil bodies, so that the cutting tool can be continuously processed. and its manufacture is simple.

Furthermore, since the cutting bodies are formed in a spiral shape so as to fit into the gaps between the coil bodies, the intervals between the cutting bodies do not deviate, and the cutting bodies do not come into contact with each other. Therefore, the cutting performance of this cutting tool can be maintained.

In addition, there is no need to fix the cutting body to the coil body by brazing, and the coil body and cutting body do not harden with brazing metal, so there is no risk of the cutting tool breaking due to such causes. do not have.

Furthermore, since the coil body is not made of thin wires twisted together like wire rope, the coil body will not deteriorate due to chips or cooling water entering.

The above objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

(Embodiment) FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line - of the embodiment in FIG. This cutting tool 10 includes a coil body 12. The coil body 12 is formed, for example, by spirally winding an elongated steel plate. This steel plate is
For example, it is formed to have a hexagonal cross section. By forming this steel plate in a spiral shape, a spiral gap 14 is formed on the outer peripheral surface of the coil body 12. A cutting body 16 is wound around the coil body 12 so as to fit into this gap 14.

The cutting body 16 includes a base body 18 made of, for example, mild steel. The base body 18 is formed, for example, into a plate shape with a hexagonal cross section. The inclined portion of the coil body 12 and the inclined portion of the base body 18 are formed so as to be in contact with each other. By forming the base body 18 in this way,
becomes difficult to shift from the gap 14 of the coil body 12.
An abrasive grain layer 20 is formed on the surface of the base body 18 by fixing abrasive grains such as fine diamond particles, for example, by electrodeposition.

In this cutting tool 10, a coil body 12 is formed into a ring shape, and this is rotated like a chainsaw. Then, by applying the object to the rotating cutting tool 10, the object is cut by the cutting body 16. However, this cutting tool 10 does not have to be formed in a ring shape. In this case, the cutting tool 10 can cut the object by reciprocating in its longitudinal direction.

In such a cutting tool 10, since the cutting body 16 fits into the gap 14, the cutting body 16 does not shift. Therefore, the distance between the cutting bodies 16 can be maintained appropriately in the longitudinal direction of the cutting tool 10. Thereby, the cutting performance of the cutting tool 10 can be maintained. Furthermore, the cutting body 16 is a coil body 12
Since the cutting tool 10 can be manufactured continuously by wrapping it around the gap 14, the manufacturing of the cutting tool 10 can be simplified.

In this cutting tool 10, as shown in FIG. 3, when a part of the cutting body 16 comes into contact with the workpiece 22,
The cutting body 16 is pushed into the gap 14 of the coil body 12. Gap 1 into which the cutting body 16 is pushed
4 is pushed wider, and the width of the adjacent gap 14 is narrowed accordingly. As a result, the cutting body 16 fitted into the narrowed gap 14 is pushed up. In this way, as shown in FIG. 4, the cutting body 16 is uniformly pressed against the object 22 to be cut. Thereby, the cutting performance of the cutting tool 10 can be kept good.

In the above-described embodiment, the base body 18 is formed to have a hexagonal cross section, but as shown in FIG. 5, it may be formed in a linear shape with a circular cross section. In this case, the base 18
An abrasive layer 20 is formed around the .

Further, as shown in FIG. 6, the coil body 12 may be formed into a linear shape with a circular cross section. In this way, the coil body 12 and the cutting body 16 can be formed into any shape such as a plate shape or a linear shape with a circular cross section.
In other words, the cutting tool 10 only needs to have the cutting body 16 formed so as to fit into the gap 14 of the coil body 12 formed in a spiral shape.

Further, in the above-described embodiment, diamond fine powder particles were used as the abrasive grains used in the abrasive grain layer 20, but abrasive grains such as cubic boron nitride (CBN) may also be used.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention. FIG. 2 is a sectional view taken along line - of the embodiment of FIG. FIG. 3 is an illustrative view showing a state in which a part of the cutting body of the cutting tool of the embodiment shown in FIG. 1 is in contact with a workpiece. FIG. 4 is an illustrative view showing the state of change of another cutting body when a part of the cutting body comes into contact with the object to be cut. FIG. 5 is a sectional view showing another embodiment of the invention. FIG. 6 is a sectional view showing still another embodiment of the invention. FIG. 7 is a perspective view showing an example of a cutting tool which is the background of the present invention. In the figure, 10 is a cutting tool, 12 is a coil body,
14 is a gap, 16 is a cutting body, 18 is a base body, and 20 is an abrasive grain layer.

Claims (1)

[Scope of Claims] 1. A coil body formed of a metal plate or a metal wire in a spiral shape, and abrasive grains fixed to the surface of the coil body, and abrasive grains attached to the outer periphery of the coil body so as to fit into the gaps between the coil bodies. A cutting tool equipped with a cutting body formed in a spiral shape. 2. The cutting tool according to claim 1, wherein the cutting body has diamond fine particles fixed to the surface of mild steel by electrodeposition.