JPS6361146B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an inner circumferential blade for cutting hard materials such as various semiconductor materials such as silicon, ceramics, tungsten, carbide, and gemstones.

(Prior Art) The present inventor invented an internal peripheral blade for cutting hard materials as shown in FIGS. 4 and 5 in Patent Application 2 filed at the same time as the present patent application.

In the previous invention, diamond or cubic boron nitride powder 14 is bound to the outside of the folded portion 13 of a thin steel strip 12, and such steel strip 12 is hung on the inner diameter side of the thin ring 11. Above ring 1
A large number of steel strips 12 are arranged radially outward from each other, and the outer ends of each of these steel strips 12 are connected to an annular frame 16 with pins 15 or the like, and then stretched with uniform strong tension using a tensioning jig. This is an inner peripheral blade for cutting hard materials.

(Problems to be Solved by the Invention) Even with these previous inventions, even if the object to be cut is quite large, it is possible to cut it with high precision, durability, and high yield. However, when rotating at high speed, turbulence occurs due to the fan-shaped gap 17 between adjacent steel strips, which adversely affects the accuracy of cut pieces during cutting, and 1 each outer end
Since it is connected to the annular frame by individual pins, etc., there are problems such as it is difficult to tighten it strongly with uniform force.

(Means for solving the problems) This invention was made to solve the problems of the previous invention, and according to this invention, diamond or cubic boron nitride powder is used. A thin steel strip is attached to the outside of the folded part, and a large number of such steel strips are arranged radially toward the outside of the ring so as to be hooked on the inner diameter side of the thin ring, and each of these steel strips is A steel strip that is folded in half at the folded part in an inner peripheral blade for cutting hard materials formed by connecting the outer end to an annular frame with a pin or the like and tensioning it with uniform strong tension using a tensioning jig. Provided is an inner circumferential blade for cutting hard materials, characterized in that the shape is fan-shaped so that no gap is created between adjacent steel strips.

In the above configuration, the diamond or cubic boron nitride powder can be bonded to the folded portion of the steel strip by electrodeposition by electroplating or electroless plating, or by sintering the metal powder. However, it is not limited to these.

(effect) The above technical means works as follows.

The difference compared to the previous invention is that the shape of the steel strip folded in half by the folding part is fan-shaped so that there is no gap between adjacent steel strips, which enables high-speed operation. Even when cutting by rotation, turbulence does not occur, so there is no adverse effect on cutting accuracy, and the outer end of the steel strip can be connected to the annular frame with two or more pins, etc.
It works so that it is easy to tighten it strongly with even force.

(Embodiment) An embodiment of the present invention will be described with reference to the drawings. 1 is a thin ring with a narrow width, 2 is a thin steel strip that has a fan-shaped shape when folded in half,
On the outside of the folded portion 3 of this steel strip 2, fine diamond powder 4 is further bonded by electroplating.

When such steel strips 2 are arranged radially so as to be hooked on the inner diameter side of the ring 1, gaps are prevented from being formed between adjacent steel strips 2.

A small hole is provided at the outer end of each of the steel strips 2, into which a pin 5 is inserted and connected to the annular frame 6, and then tensioned with uniform and strong tension by a tensioning jig (not shown). .

In this way, the inner peripheral blade for cutting hard materials is formed.

(Effects of the Invention) As explained above, the present invention, like the previous invention, can cut even if the object to be cut is quite large.
Not only can it cut with high precision, durability, and high yield, but even when rotating at high speed, there is no gap between the steel strips, so cutting is possible without turbulence. This does not adversely affect the accuracy of the cut pieces.

Furthermore, since the steel strip is fan-shaped, each outer end of the steel strip is wider than the folded portion, so it can be securely connected to the annular frame using two or more pins, etc. It is possible to tighten the steel strip strongly with even force.

[Brief explanation of drawings]

1 to 3 show an embodiment of the inner peripheral blade for cutting hard materials according to the present invention, FIG. 1 is a plan view thereof, and FIG. 2 is an enlarged cross section taken along line A-A in FIG. 1. Figures 3 and 3 are enlarged views of the main parts of Figure 1, Figures 4 and 5 show the internal blade for cutting hard materials of the previous invention, and Figure 4 is a plan view thereof. 4 is a sectional view taken along line A-A in FIG. 4. In the drawings, 1 is a thin ring, 2 is a thin steel strip having a fan shape, 3 is a folded part, 4 is a fine diamond powder, 5 is a pin, and 6 is an annular frame.

Claims (1)

[Claims] 1. Diamond or cubic boron nitride powder is bound to the outside of the folded part of a thin steel strip, and such a steel strip is hung on the inner diameter side of the thin ring to form the ring. For cutting hard materials formed by arranging a large number of steel strips radially outward, connecting the outer ends of each of these steel strips to an annular frame with pins, etc., and tensioning them with uniform strong tension using a tensioning jig. An inner blade for cutting hard materials, characterized in that the shape of the steel strip folded in half by the folded portion is fan-shaped so that no gap is created between adjacent steel strips. Surrounding blade. 2. Claim No. 2, characterized in that diamond or cubic boron nitride powder is bonded to the folded portion of the steel strip by electrodeposition by electroplating or electroless plating. The inner peripheral blade for cutting hard materials according to item 1. 3. The hard material cutting tool according to claim 1, wherein diamond or cubic boron nitride powder is bonded to the folded portion of the steel strip by sintering the metal powder. Surrounding blade.