JP2000084731A - Tip saw - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a thin plate part abrade in proportion to abrasion of a tip, and to cut again with sufficient sharpness, by forming thinly a part for deciding the depth of cut at a facing part of a cemented carbide tip body. SOLUTION: Many recess parts 13 are formed on the peripheral part of a body 11. The thickness of a part of an edge plate part (edge plate peripheral part) between a facing side 15 of the recess part 13 and other side 16a of the next recess part 13a is changed. Namely, if the thickness of the whole edge plate peripheral part 17 is thinned excessively, the bearing force of a cemented carbide tip 2 is reduced, therefore, a prescribed region is formed thinly (thin plate part 18) so as to have abrasion easiness in the range where the reduction is avoided. When biting of the cemented carbide tip 2 body is lost by abrasion, the thin plate part 17 is abraded in proportion to that, therefore, even when the cemented carbide tip 2 body is abraded the biting depth of the tip body 2 is secured, to thereby elongate the using life.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chip saw mainly used for a metal plate cutting machine.

[0002]

2. Description of the Related Art A tip saw is used for a circular saw machine for woodworking, an electric brush cutter, a metal plate cutting machine, and the like. It is attached. The present invention particularly relates to a chip saw for a metal working machine.Since a chip saw for a metal working machine exerts a strong force on a chip body at the time of cutting as compared with wood and weeds, the blade plate behind the chip body has a sufficient blade plate. It has a form having strength and limits the bite depth of the cutting edge of the insert. That is, the tip saw for wood processing and brushing, the outer peripheral surface of the blade plate is formed in a waveform, the tip body is mounted on the opposite edge in the rotation direction of the concave portion of the waveform, behind the tip body,
The next wave-shaped concave portion is formed. However, in the case of a metal cutting tip saw, the force received by the tip body must be sufficiently supported by the blade plate, and the biting depth of the tip is 1 mm or less (generally, about 0.2 to 0.7 mm: In order to limit the chip breakage, a large number of chip mounting recesses are formed in the outer peripheral portion of the circular blade plate, and an appropriate space is provided between the opposite side in the recess and the other side. The tip body is mounted, and the blade plate on the back side of the carbide tip body is not largely depressed in the inner circumferential direction so as to support the chip body.

[0003]

When the above-mentioned metal working tip saw is mounted on an apparatus and used, the cemented carbide tip is naturally worn out. In particular, if the cutting edge of the tip body is worn and the difference in height from the top of the side opposite to the concave portion, that is, the bite depth of the tip body with respect to the cutting object is lost, the cutting action cannot be obtained. Therefore, the conventional tip saw for processing a metal plate has a problem that the service life is short due to the wear of the cutting edge because the degree of protrusion of the cutting edge is reduced for the purpose of use.

Accordingly, the present invention proposes a novel tip saw which has a long service life due to wear of the tip body even if the tip body is sufficiently supported and the biting of the tip body is reduced.

[0005]

According to the present invention, there is provided a tip saw having a plurality of tip mounting recesses formed on an outer peripheral portion of a circular blade plate, and having an appropriate space between opposing sides in the recess and the other side. At least, in the tip saw where the cemented carbide tip body is widened by the set and protruded to the outer circumference of the cut, the place (thin plate part) that determines the cut depth at the opposed part of the carbide tip body is formed thin. It is characterized by becoming.

The tip saw is mounted on an appropriate metal working machine, and is rotated in a predetermined direction to cut a metal plate with a carbide tip at the tip of the tip saw. In particular, when the cutting use is continued, the cutting edge portion of the tip of the tip body wears out, and if the difference in height from the top of the concave opposing side, that is, the bite depth of the tip body with respect to the object to be cut is eliminated, the chip Since the thin plate portion facing the body is easily worn and the appropriate biting depth (1 mm or less) is restored, cutting can be performed again with sufficient sharpness.

[0007]

Next, an embodiment of the present invention will be described. The tip saw shown in the embodiment includes a blade plate 1 and a carbide tip body 2 as in the conventional tip saw.

[0008] The blade plate 1 is a main body 1 formed of a circular metal plate.
An appropriate rotating shaft mounting portion (through-hole) 12 is provided at the center of 1, and a large number of concave portions 13 are formed on the outer peripheral portion of the main body 11.
It is set to 14.

The cemented carbide tip body 2 has a suitable space between the opposite side 15 facing the rotational direction in the concave portion 13 and the other side 16 so that the width of the set is wide and the notch (usually About 0.2 to 0.4 mm is optimal) and mounted on the outer periphery.

The present invention is particularly applicable to the opposing side 1 of the recess 13 described above.
The thickness of a part of the blade plate portion (blade plate outer peripheral portion) 17 between the fifth portion 5 and the other side 16a of the next concave portion 13a is changed. That is, if the entire thickness of the outer peripheral portion 17 of the blade is made too thin, the supporting strength of the cemented carbide tip 2 will be reduced. The area is formed thin (the thin plate portion 18). Specifically, the entirety of the rear protruding portion of the intermediate concave portion 14 of the outer peripheral portion 17 is used as the thin plate portion 17.

[0011] In the same manner as a normal tip saw, it is mounted on a suitable metal cutting machine, rotated in a predetermined direction, and used for cutting a metal plate with the tip tip 2 of the tip saw. When the tip body is worn and the bite is eliminated, the thin plate portion 17 is also worn accordingly. Even if the carbide tip body 2 is worn, the bite depth of the chip body is secured, so that the service life is shortened. Is something that gets longer.

[0012]

As described above, according to the present invention, a cemented carbide tip is mounted on the rotationally opposed sides of a number of concave portions provided on the outer peripheral portion of a circular blade plate, and the other side of the concave portion is formed as a thin plate portion. The thin plate portion is also worn in accordance with the wear of the tip, thereby extending the service life of the tip saw.

[Brief description of the drawings]

FIG. 1 is a partial front view of an embodiment of the present invention.

FIG. 2 is an enlarged front view of the same part.

FIG. 3 is an end view of the same part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Blade plate 11 Main body 12 Rotating shaft mounting part (through hole) 13 Concave part 14 Intermediate concave part 15 Opposite side 16 Other side 17 Outer peripheral part 18 Thin plate part 2 Chip body

Claims (1)

[Claims] 1. A large number of chip mounting recesses are formed in the outer peripheral portion of a circular blade plate, and an opposing side in the recess is provided with an appropriate space between the other side and a cemented carbide chip body is widened by a set width. And a tip saw which is mounted so as to protrude from the outer periphery of the notch by cutting, wherein a portion for determining a notch depth in a facing portion of the cemented carbide tip body is formed to be thin.