JPS61288919A - Metallic cutter - Google Patents

Abstract

PURPOSE:To enable a cut surface to be polishied simultaneously with cutting action, by protruding a saw tooth to the end edge of a base material while a polishing tooth to obverse and reverse sides of the saw tooth while quenching a hard quality layer on a surface layer of the saw tooth and the polishing tooth and forming a cutter by the hard quality layer and a coating layer provided in a surface of the hard quality layer. CONSTITUTION:A metallic cutter 1, being mounted to a rotary shaft of a rotary cutting machine by utilizing a center hole, is rotated, and if a work is moved approaching, the cuter 1 cuts the work by a cutting edge 9 of a saw tooth 3 simultaneously polishes a cut surface by a top surface 10 of a polishing tooth 4 and its edge 12. Here the cutter, forming a coating layer 6 in hardness smaller than that of a hard quality layer 5, wears only a part necessary for cutting and polishing to be removed by contact with the work, and the cutter 1 well cuts and polishes the work by the exposed hard quality layer 5 while smoothly discharges cutting and polishing chips with no adherence by the remaining coating layer 6. Accordingly, the cutter, preventing blocking of the cutting and polishing chips, enables seizure to be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to improvements in metal cutting tools used when cutting non-metallic and metallic objects to be polished.

(Prior art) Generally, when cutting non-metal objects such as wood, bamboo, synthetic resin, etc., or metal objects such as aluminum, brass, copper, steel, etc., a hacksaw or circular saw is used. Metal cutting tools such as these are often used.

However, conventional metal cutting tools avoid friction between the saw body and the cutting groove by, for example, bending the tips of the blades outward alternately and adding so-called burrs, so that the cut surface of the workpiece is The cut surface was not finished cleanly, and the cut surface had to be polished separately using a polishing tool.

(Problems to be Solved by the Invention) The present invention was devised in order to solve the above-mentioned problems, and its purpose is to be able to cut the object at the same time. To provide a metal cutting tool capable of polishing a cut surface.

(Means for Solving the Problems) The metal cutting tool of the present invention includes a metal matrix having a flat plate shape, a plurality of sawteeth integrally formed to protrude from the edge of the matrix, and a surface of the matrix. A large number of polished teeth are formed to protrude from at least one of the back surfaces, a hard layer is formed by hardening on at least the surface layer of the matrix, the sawtooth, and the polished tooth, and a coating layer is formed on the outer surface of the hard layer. It is distinctive in that it is composed of .

(Function) When the metal cutting tool and the tool to be cut are brought into close proximity while moving relative to each other, the object to be cut is cut by the saw teeth, and at the same time, the cut surface is polished by the polishing teeth. be done.

Since at least the surface layer of the metal cutting tool is a hard layer, the hardness increases and the initial shape can be maintained for a long period of time.

When the hardness of the coating layer is smaller than that of the hard layer, the parts of the coating layer necessary for cutting and polishing are abraded and removed by contact with the object to be cut, and the exposed hard layer allows for good cutting and polishing. At the same time, cutting debris and polishing debris are smoothly discharged without adhering to the remaining coating layer.

When the hardness of the coating layer is greater than that of the hard layer, cutting and polishing can be performed well without abrasion of the coating layer, and cutting and polishing debris can be smoothly cut and polished without adhering to the coating layer. be discharged.

(Example) Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a plan view showing a metal cutting tool according to an embodiment of the present invention. FIG. 2 is a partially enlarged plan view. Third
The figure is a longitudinal sectional front view taken along line I-1 in FIG. 2.

The main parts of the metal cutting tool 1 include a base body 2, saw teeth 3, grinding teeth 4, a hard layer 5, and a coating layer 6.

The base body 2 is made of metal and has a flat plate shape.

In this example, it has a disk shape with a central hole 7, and is made of a metal plate.

A large number of sawteeth 3 are integrally formed to protrude from the edge of the base body 2.

In this example, the cutting edge 9 is formed by two adjacent arcuate surfaces 8 and has a chevron shape, and these are formed regularly at predetermined intervals on the outer periphery.

A large number of polishing teeth 4 are formed to protrude from at least one of the front and back surfaces of the base body 2.

In this example, they are formed symmetrically on the front and back surfaces of the base body 20.

Each grinding tooth 4 has a fine mushroom shape with a flat top surface 10, an arcuate side surface 11, and a blade 12 formed at the boundary between these teeth, and is regularly formed in a predetermined arrangement. The angle α between the top surface 10 and the side surface 11 is less than or equal to a right angle.

The top surface 10 of each polishing tooth 4 is a so-called rough surface in which a large number of extremely fine and irregular irregularities are formed.

The hard layer 5 is formed by hardening at least the surface layers of the base body 2, the saw teeth 3, and the polished teeth 4.

In this example, only the surface layers of the base body 2, the saw teeth 3, and the polished teeth 40 are hardened.

The coating layer 6 is formed on the outer surface of the hard layer 5.

In this example, the hard layer 5 is formed by coating with a synthetic resin whose hardness is smaller than that of the hard layer 5.

The metal cutting tool 1 of this embodiment has an outer diameter of about 150ff,
The center hole diameter D' is approximately 18 mm, and the total thickness T is approximately 0.5 mm. fll, the tooth height H of the - tooth 3 is approximately 0°5N, the tooth height of the polished tooth 4 is approximately 0.13 dew, and the maximum diameter d is approximately 0.13
It is done to fl.

Such a metal cutting tool 1 is attached to the rotating shaft of a rotary cutting machine using the center hole 7.

Then, when the metal cutting tool 1 is rotated and the object to be cut is brought close to it, the object to be cut is cut by the cutting edge 9 of the sawtooth 3, and at the same time, the cut surface is the top surface of the polished tooth 40. lO(
(rough surface) and is polished by the blade 12.

At this time, since the hardness of the coating layer 6 is smaller than that of the hard layer 5, only the portion necessary for cutting and polishing is abraded and removed by contact with the object to be cut, and the exposed hard layer 5 allows for good cutting and polishing. At the same time, cutting debris and polishing debris are smoothly discharged without adhering to the remaining coating layer 6.

Therefore, it is possible to prevent clogging with cutting debris and polishing debris, and it is also possible to prevent seizure of the metal cutting tool 1 due to clogging.

Such a metal cutting tool 1 is manufactured, for example, by the following method.

First, a rectangular metal plate with a thickness of approximately 0.5 mm with roughened front and back surfaces was used as a starting material, and the
The polishing teeth 4 are formed by the method for manufacturing a metal polishing body disclosed in Japanese Patent No. 477.

Next, it is punched using a press machine to form a disk shape with a center hole 7, and the edges of this disk shape are cut using a tooth shield to form saw teeth 3.

After hardening only the surface layer using a heat treatment machine to form a hard layer 5, the outer surface of the hard layer 5 is coated with a synthetic resin using a coating machine to complete the metal cutting tool 1.

The material of the metal cutting tool 1 may be, for example, a metal material such as stainless steel.

Although the shape of the metal cutting tool 1 was disk-shaped in the previous embodiment, it is not limited to this, and may be rectangular as shown in FIG. 4, for example.

In this case, the saw teeth 3 may be formed on at least one end edge.

The size of the metal cutting tool l is not limited to the previous embodiment, and can be selected as appropriate.

In the previous embodiment, the metal cutting tool 1 formed the saw teeth 3 after forming the abrasive teeth 4, but the present invention is not limited to this, and for example, this order may be reversed.

In the previous embodiment, the metal cutting tool 1 has the abrasive teeth 4 formed on the front and back surfaces of the base body 20, but the present invention is not limited to this. For example, as shown in FIG. 5, the abrasive teeth 4 may be formed only on one surface of the base body 2. Alternatively, as shown in FIG. 6, it is possible to prepare two of the above components and integrate them by spot welding or the like.

In addition, in the case of Fig. 6, saw teeth 3 are also formed before joining,
The saw teeth 3 may be shifted from each other when combined.

In the previous embodiment, the metal cutting tool 1 has a pair of grinding teeth 4 formed on the front and back surfaces of the base body 20. Although it is a nominal form, it is not limited to this.
For example, it is possible to have an asymmetrical shape or to have both polishing teeth 4 arranged differently.

Although the shape of the sawteeth 3 was chevron-shaped in the previous embodiment, it is not limited to this and may be of other shapes.

In the previous embodiment, the sawteeth 3 were arranged regularly, but
It is not limited to this, and may be irregular.

The size of the sawteeth 3 is not limited to the previous embodiment, and can be selected as appropriate.

In the previous embodiment, the sawtooth 3 was formed by cutting with a gear cutting machine, but the sawtooth 3 is not limited to this, and may be formed by punching with a press machine, for example, or by photolithography. You can also do it.

Although the shape of the polishing teeth 4 was mushroom-shaped in the previous embodiment, it may also be, for example, a row-like shape or a row-like shape in which row-like shapes are intersected vertically and horizontally.

The size of the polishing teeth 4 is not limited to the above embodiment, and can be selected as appropriate.

Although the arrangement of the polishing teeth 4 was regular in the previous embodiment, the arrangement is not limited to this, and may be irregular.

The top surface of the polished tooth 40 was a rough surface in the previous embodiment, but
The surface is not limited to this, and may be a smooth surface.

In the previous embodiment, the polishing tooth 4 was manufactured by Japanese Patent Application Laid-Open No. 58-15147.
Although the metal abrasive body is formed by the method for manufacturing a metal polishing body disclosed in Japanese Patent No. 7, the present invention is not limited thereto, and other methods may be used.

In the previous example, the hard layer 5 was formed only on the surface layer, but
It is not limited to this, and may be formed entirely.

In the previous embodiment, the coating layer 6 was formed by coating a synthetic resin such as melamine resin, acrylic resin, or Teflon resin. It can be formed by coating. In the case of synthetic resin,
The hardness is smaller than the hard layer 5, and in the case of hard chrome plating or ceramic coating, the hardness is larger than the hard layer 5.

(Effects of the Invention) As described above, according to the present invention, the following excellent effects can be achieved.

(1) Since it is equipped with saw teeth and polishing teeth, it is possible to cut the object and at the same time polish the cut surface.

Therefore, there is no need for separate polishing after cutting, and work efficiency can be improved.

(2) Since it is equipped with polished teeth in addition to the saw teeth, there is no need to chamfer the saw teeth as in the conventional case.

As a result, the sawtooth formation becomes easier and the strength is also improved.

(3) Since it is equipped with polished teeth in addition to saw teeth, the surface area is increased, which improves the heat dissipation effect.

(4) Since it is provided with a hard layer, the hardness is increased, and the saw teeth and polished teeth in particular can maintain their initial shape for a long period of time.

Therefore, the desired cutting and polishing action can be exerted over a long period of time, making it possible to extend the service life.

(5) Since it is provided with a coating layer, cutting debris and polishing debris can be smoothly discharged without adhering to them.

As a result, clogging due to cutting debris and polishing debris can be prevented, and seizure caused by clogging can be prevented.

(6) Since it is provided with a coating layer, it is possible to prevent the hard layer, which is easily corroded, from rusting.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view showing a metal cutting tool according to an embodiment of the present invention. FIG. 2 is a partially enlarged plan view. FIG. 3 is a longitudinal sectional front view of I-IN in FIG. 2. FIG. 4 is a plan view showing another embodiment of the present invention. FIG. 5 is an enlarged longitudinal sectional front view showing still another embodiment of the present invention. FIG. 6 is an enlarged longitudinal sectional front view showing still another embodiment of the present invention. l... Metal cutting tool 2... Base body 3... Saw teeth 4... Polished teeth 5... Hard layer 6 ...Coating layer Fig. 7 2 ... Base 3 ... Saw teeth 4 ... Polished teeth 5 ... Hard layer 6 ... ...Coating layer Figure 2... 9 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] A metal base having a flat plate shape, a large number of saw teeth integrally formed to protrude from the edge of the base, and a large number of polishing teeth formed to protrude from at least one of the front and back surfaces of the base;
A metal cutting tool comprising: a hard layer formed by hardening on at least the surface layer of the base body, the saw teeth and the polished teeth, and a coating layer formed on the outer surface of the hard layer.