JPH0521318Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is a diamond abrasive electrodeposition suitable for cutting stones such as marble, tiles, tiles, composite building materials, resins, gypsum boards, plastics, glass materials, etc. It's about cutters.

[Prior Art] The inventor of the present invention has previously developed a technology related to a diamond abrasive electrodeposition cutter, which is currently being filed as U.S. Pat.

In this technique, as shown in FIGS. 3A and 3B, the upper portions of a plurality of hob-shaped protrusions formed with gaps 33 on the outer periphery of a metal circular substrate 31 are used as cutting edge forming portions 3. Front surface 3 in the rotational direction of the blade forming part 32
2a and the outer peripheral surface 32b form an obtuse angle.
2a is inclined, and diamond abrasive grains 34 are bonded to the surfaces of the cutting edge forming portions 32 by electroplating to form cutting edges.

[Problems to be solved by the invention] According to this technique, the front surface 22a is inclined so that the front surface 22a in the rotational direction of the cutting blade forming portion 22 and the outer circumferential surface 22b form an obtuse angle, thereby reducing the impact during cutting. As a result, the generation of heat during cutting can be reduced, so the diamond abrasive grains electrodeposited near the connection between the front surface of the cutting edge forming part and the outer circumferential surface do not break or fall off, improving sharpness and cutting the workpiece. The chipping of the material was reduced and the life of the cutter was extended.

However, in this technique, since the thickness of the cutting edge forming portion 22 is uniform and the same as that of the circular substrate 21, as the circular substrate 21 becomes thicker, the cutting edge forming portion 22 naturally also becomes thicker. Therefore, there were problems such as increased chipping of the work material.

This invention is an improvement on the above-mentioned technology, focusing on the fact that the thinner the cutting edge is, the less chipping of the workpiece. An object of the present invention is to provide a diamond abrasive electrodeposited cutter which can reduce chipping of material.

[Means for solving the problem] The present invention was made for the above purpose,
The diamond abrasive electrodeposited cutter of the present invention has a cutting edge forming section at the top of a plurality of hob-like protrusions formed at intervals on the outer periphery of a circular metal substrate, and a front surface in the rotational direction of the cutting edge forming section. The front surface is inclined so that the outer peripheral surface forms an obtuse angle, and the wall thickness near the connection between the front surface in the rotational direction and the outer peripheral surface is thinned to form a scraped surface,
A cutting edge is formed by bonding diamond abrasive grains to the entire surface of the cutting edge forming portion by electroplating. Further, it is preferable that the thickness of the scraped surface near the connecting portion between the front surface in the direction of rotation and the outer circumferential surface is thinned by alternately scraping off both sides of the cutting edge forming portion. Furthermore, when forming the scraped surface by thinning the wall thickness near the connection between the front surface in the rotational direction and the outer circumferential surface, at least the thinned portion is continuously scraped from the same side of the plurality of cutting edge forming parts. Preferably, the configuration is provided.

[Function] Therefore, by slanting the front surface so that the front surface in the direction of rotation of the cutting edge forming part and the outer circumferential surface form an obtuse angle, and by reducing the wall thickness near the connection between the front surface in the direction of rotation and the outer circumferential surface, It can reduce the impact during cutting, smooth the cutting into the work material, and reduce the generation of heat during cutting, which further reduces chipping of the work material and improves sharpness.

[Example] Next, an example of the present invention will be described with reference to the accompanying drawings. Note that the members, arrangement, etc. described below are not intended to limit the present invention, and can be modified in various ways without departing from the spirit of the present invention.

Fig. 1A is a front view of the main part with diamond abrasive grains partially omitted, Fig. 1B is an enlarged front view of the cutting blade 3 in Fig. 1A, Fig. 1C is a partial enlarged view of Fig. 1A, and Fig. 1D
The figure is a developed view of the outer periphery of FIG. 1C, and FIG. 1E is a perspective view of the cutting edge forming portion 2.

1A and 1B, reference numeral 1 denotes a metal circular substrate, and a plurality of cutting edge forming portions 2 are formed on the outer periphery of the circular substrate 1 at predetermined intervals with gaps 4 between each other. ing. As shown in FIG. 1C, the cutting edge forming portion 2 of this embodiment has a front surface 2 in the rotation direction
a, including the outer peripheral surface 2b and the scraped surface 2c, the front surface 2a is inclined so that the front surface 2a and the outer peripheral surface 2b form an obtuse angle in the direction of rotation (indicated by arrow a), and the front surface 2a
The thickness near the connection between the outer peripheral surface 2b and the outer peripheral surface 2b is reduced by scraping off one side of the cutting edge forming portion 2 to form a scraped surface 2c. The scraped surfaces 2c in this example are formed by alternately scraping off the vicinity of the connection between the front surface 2a and the outer circumferential surface 2b of the front side or the back side of the cutting edge forming portion 2. Therefore, the outer circumferential surface 2b extends toward the front surface 2a and toward the front surface 2a.
has a tapered shape toward the outer peripheral surface 2b.

The inclined front surface 2a and the outer peripheral surface 2b of the cutting edge forming part 2 are connected by a curve, and the cutting edge 3 is formed by electrodepositing diamond abrasive grains 5 on the entire surface of the cutting edge forming part 2. When the cutting blade 3 is viewed from the front side, the cutting blade front surface 2a has a tapered shape toward the outer circumferential surface 2b.

Further, the diamond abrasive grains 5 are electrodeposited to a point that is usually about 2 to 3 mm inward from the outer circumferential surface 2b of the cutting edge forming portion 2.

Note that reference numeral 6 in FIG. 1A is a hole for dissipating heat generated in the circular substrate 1 to cool the substrate 1, and reference numeral 7 is a hole for attaching a cutter.

According to the embodiment configured as described above, the thickness of the cutting surface 2c, which is the connecting part between the inclined front surface 2a and the outer circumferential surface 2b that collides with the workpiece, is thinner than that of conventional cutters. The cutting into the material becomes smooth. Furthermore, the thinner the thickness of the connecting portion, which is the scraped surface 2c, is, the more effective it is in terms of reducing chipping of the workpiece, but it needs to be thicker than the grain size of the diamond abrasive grains 5 at least.

In the above embodiment, the inclined front surface 2a of the cutting edge forming portion 2 has a shape in which a straight line and a curved line are connected, but the entire inclined front surface 2a may be formed into a straight line or an arc shape.

FIG. 2 is a developed outer circumferential view similar to FIG. 1D showing a second embodiment of the present invention. Note that the same parts as in the above embodiment are given the same reference numerals, and the explanation thereof will be omitted.

Whereas in the above embodiment, the scraped surfaces 2c are formed by alternately scraping off near the connection between the front surface 2a and the outer circumferential surface 2b on the front side or the back side of the cutting edge forming part 2. In this embodiment, two cutting edge forming portions 2 are formed in succession from one side of the front side or the back side, that is, the scraping surface 22c is continuously formed,
This shows an example in which two scraped surfaces 22c are subsequently formed from the other side (that is, continuously). As described above, the scraped surfaces are not particularly limited as long as the scraped surfaces on one side and the scraped surfaces on the other side are formed so as to maintain balance during rotation.

[Effects of the invention] As described above, the present invention tilts the front surface of the cutting blade forming portion so that the front surface in the direction of rotation and the outer circumferential surface form an obtuse angle, and also reduces the thickness near the connection between the front surface in the direction of rotation and the outer circumferential surface. Since the thickness is made thinner and the surface is ground, the impact during cutting is reduced, and the bite into the work material is smooth, reducing the generation of heat during cutting. No more crushing or falling off of abrasive grains, further reducing chipping of the workpiece and improving sharpness.

As described above, according to the present invention, when cutting marble, tiles, composite building materials, etc. where chipping is important, it is possible to suppress the occurrence of chipping and cut smoothly.

[Brief explanation of the drawing]

1A and 1E show a first embodiment of the diamond abrasive electrodeposited cutter according to the present invention, FIG. 1A is a front view of the main part, and FIG. 1B is an enlarged front view of the cutting blade in FIG. 1A. Figure 1C is a partially enlarged view of Figure 1A, Figure 1D is a developed view of the outer periphery of Figure 1C,
Figure E is a perspective view of the cutting edge forming part, Figure 2 is a developed view of the outer periphery showing the second embodiment, and Figures 3A and 3B are a front view and enlarged sectional view of main parts of a conventional diamond abrasive electrodeposited cutter. It is. DESCRIPTION OF SYMBOLS 1... Circular board, 2... Cutting edge forming part, 2a...
Rotation direction front, 2b...outer peripheral surface, 2c, 22c...
...Abraded surface, 3...Cutting edge, 4...Gap, 5...Diamond abrasive grain, a...Rotation direction.

Claims (1)

[Claims for Utility Model Registration] 1. The upper part of a plurality of hob-shaped protrusions formed at intervals on the outer periphery of a metal circular substrate is a cutting blade forming part, and the front surface in the rotational direction and the outer circumferential surface of the cutting blade forming part The front surface is inclined so as to form an obtuse angle, and the wall thickness near the connection between the front surface in the direction of rotation and the outer peripheral surface is made thinner to form a cutting surface, and diamond abrasive grains are electrically applied to the entire surface of the cutting edge forming portion. A diamond abrasive electrodeposited cutter characterized by having a cutting edge formed by bonding using the plating method. 2. A utility model registration claim characterized in that the scraped surface is thinned by alternately scraping away the wall thickness near the connecting portion between the front surface in the rotational direction and the outer circumferential surface from both sides of the cutting edge forming portion. A diamond abrasive electrodeposited cutter according to Item 1. 3. In the case where the scraped surface is formed by thinning the wall thickness near the connecting portion between the front surface in the rotational direction and the outer circumferential surface, the thinning portion is formed by continuously scraping at least from the same side of the plurality of cutting edge forming portions. A diamond abrasive electrodeposited cutter according to claim 1 or 2, characterized in that the diamond abrasive electrodeposited cutter is provided with a portion having a cylindrical shape.