JPH0731233U - Stainless steel tip saw - Google Patents

Abstract

(57) [Summary] [Purpose] Able to cut stainless steel, which is a difficult-to-cut material, and can also be used with conventional circular saw machines, and to extend the service life. [Structure] A center hole is formed in a main body 2 made of a metal disk having a thickness of 1.2 mm and an outer diameter of 180 mm.
36 convex portions 2a are provided on the peripheral edge of the. The convex portion 2a has a length of 4.5 mm, a width of 1.8 mm, and a thickness of 1.5.
A rectangular parallelepiped cemented carbide chip 4 of mm is brazed along the radial direction. The cemented carbide tips 4 are attached to the convex portions 2a so as to alternately project in a direction orthogonal to the central plane direction of the main body 2. Therefore, the protruding portions of the cemented carbide tips 4 alternately cut the stainless steel when cutting.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a tip saw having a blade of a circular saw with cemented carbide, and more specifically, to a tip saw for stainless steel that specially cuts difficult-to-cut stainless steel.

[0002]

[Prior art]

 Conventionally, a method that does not rely on a tip saw, such as a nibble method of repeatedly bending and cutting stainless steel, a shearing method using a shearing machine, or a plasma cutting method, has been used to cut stainless steel.

Further, cutting of stainless steel with a tip saw is possible only under a very limited condition of a peripheral speed of 200 m / min or less.

[0004]

[Problems to be solved by the device]

 However, when the above-mentioned tip saw is not used, there is a problem that cutting of stainless steel does not provide a good cut surface or cutting cost becomes higher than cutting of other materials by the tip saw.

Further, when the above-mentioned tip saw is used, it cannot be practically used due to a problem of machinability and a problem of durability of the tooth portion, and under a condition that the peripheral speed is extremely slow, about 1/10 of the normal speed. There is a problem that the cutting efficiency of stainless steel is considerably low. There is also the problem of versatility that the peripheral speed is too slow to be applied to conventional circular saw machines.

In view of the above problems, an object of the present invention is to provide a chip saw for stainless steel that can cut stainless steel, which is difficult to cut, and that can be used with a conventional circular saw machine, and has a long life. is there.

[0007]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention provides a plurality of convex portions at predetermined intervals along the circumference of a metal thin disk-shaped main body, and each of the convex portions is provided with a carbide tip. In a stainless steel saw having teeth formed by being fixed, each of the above-mentioned cemented carbide tips alternately protrudes in one direction and in the other direction orthogonal to the central plane direction of the main body with respect to each of the convex portions. The corner of the front cutting edge is formed so as to have a predetermined corner angle.

[0008]

[Action]

 According to the tip saw for stainless steel of the present invention configured as described above, in each tooth portion of the tip saw, the tooth portion having the portion protruding in one direction orthogonal to the central plane direction of the main body is the work material. Cut stainless steel. Next, the toothed portion having a portion projecting to the other side in the central plane direction of the main body is cut from stainless steel which is a work material. That is, the tooth portion that alternately protrudes in the direction orthogonal to the central plane direction of the main body alternately cuts the workpiece stainless steel.

Further, since the corner of the front cutting edge is formed to have a predetermined corner angle, it can be used until the corner angle disappears even if the front cutting edge wears.

[0010]

【Example】

 Hereinafter, a first embodiment embodying the present invention will be described with reference to FIGS. 1 to 3A and 3B.

As shown in FIG. 1, the tip saw 1 is formed into a circular saw machine at the center of a main body 2 made of a metal disk having a thickness of 1.2 mm and an outer diameter of 180 mm that constitutes the tip saw 1. A center hole 3 for mounting is formed. Further, 36 convex portions 2a are formed on the circumference of the main body 2 at equal intervals.

The cemented carbide tip 4 is formed into a substantially rectangular parallelepiped shape with tungsten carbide (WC) having a length of “4.5 mm”, a width of “1.8 mm” and a thickness of “1.5 mm”. Thirty-six cemented carbide tips 4 are joined to the convex portion 2a in the radial direction by R-shaped brazing. Therefore, the tooth tip pitch is "15.7 mm".

The cemented carbide tips 4 are attached to the protrusions 2 a one after another in such a manner that they slightly project alternately to one and the other in a direction orthogonal to the central plane direction of the main body 2. That is, as shown in FIG. 3 (a), the carbide tip 4 projects rightward by Y "0.3 mm" from the right end of the convex portion 2a and left by X "0.1 mm" from the left end of the convex portion 2a. It is arranged so as to project in the direction. Further, as shown in FIG. 3 (b), the cemented carbide tip 4 projects rightward by x “0.1 mm” from the right end of the convex portion 2a, and moves leftward by y “0.3 mm” from the left end of the convex portion 2a. It is arranged so as to project to. Then, as shown in FIGS. 3A and 3B, the cemented carbide chips 4 arranged on the convex portions 2a are alternately arranged on the circumference of the main body 2. That is, each of the cemented carbide tips 4 is provided so that the tooth portions 5 that alternately project in the direction orthogonal to the center plane of the main body 2 when cutting stainless steel alternately cut the stainless steel.

As shown in FIG. 2, the tooth portion 5 made of the cemented carbide tip 4 is ground into a predetermined shape by an automatic grinder equipped with a diamond grindstone, the rake angle is “0 degree”, and the flank angle B is “ It is set to 4.5 degrees. No round land is provided. Further, as shown in FIGS. 3 (a) and 3 (b), the tooth portion 5 has the front cutting edge 6 set to “1.5 mm”. Further, both ends of the front cutting edge 6 are chamfered at a corner angle C of “45 degrees” in order to make the tooth portion 5 last longer even if the front cutting edge 6 is worn away.

Next, the operation of the stainless steel tip saw 1 configured as described above will be described. The tip saw 1 is mounted on a circular saw machine (not shown), and the peripheral speed of the tip saw 1 reaches 800 to 2500 m / min during cutting. Then, after the peripheral speed of the tip saw 1 is stabilized, the stainless steel which is the work material is cut.

The tooth portion 5 has a front cutting edge 6 of “1.5 mm” and a corner angle C of “45 degrees”. As a result, stress concentration in the tooth portion 5 is reduced, so chipping of the tooth portion 5 is prevented.

Further, since the 36 tooth portions 5 brazed to the convex portion 2 a of the main body 2 are alternately projected in the direction orthogonal to the central plane of the main body 2, the impact at the time of cutting is caused by each tooth portion 5. Become smaller by being shared by each other.

Since both corners of the front cutting edge 6 have a corner angle C of “45 degrees”, even if the front cutting edge 6 is worn, it can be used until the corner angle C disappears. Therefore, according to this tip saw 1, even if it is used under the condition that the peripheral speed is 800 to 2500 m / min, the stainless steel can be cut, and the chipping and wear of the tooth portion 5 can be suppressed, so that the tip saw can be used sufficiently. Can withstand.

Further, since the tip saw 1 is used under the peripheral speed condition of the peripheral speed of 800 to 2500 m / min, which is almost the same range as that of a general-purpose tip saw, it is used by being mounted on a conventional circular saw machine as it is. be able to. Moreover, since the peripheral speed is sufficiently fast, the cutting efficiency of stainless steel can be improved.

Further, compared with the nibler method, the shearing method, etc. which have been conventionally used for cutting stainless steel, the cutting surface of stainless steel becomes better and the cutting cost of stainless steel can be reduced. Further, compared with the plasma cutting method, the cutting can be performed easily and the cutting cost can be significantly reduced.

Further, by providing the corner angle C, even if the cemented carbide tip 4 is worn, it can be used until the corner angle C 1 disappears, so that the life can be extended. The present invention is not limited to the above-described embodiment, but may be configured as follows, for example, within a range not departing from the gist of the present invention. (1) In the above-described embodiment, a tooth with the center of the tip of the tooth portion 5 left as the front cutting edge 6 by "1.5 mm" so that the corner angle C is "45 degrees" is chamfered equally on both sides. It has a part shape. On the other hand, the width of the front cutting edge 6 and the size of the corner angles C provided evenly on the left and right sides can be appropriately set. Further, as shown in FIGS. 4A and 4B, the tip of the tooth portion 10 may be provided with a corner angle C in an inclined shape from one side to the other side. (2) In the above embodiment, X “0.1 mm”, Y “0.3 mm”, x “0.1 mm”, and y “0.3 mm” are set. However, for example, in FIGS. As shown, both X 1 and x 2 may be “0 mm”. Both Y and y may be set to "0". Further, although X and x are the same and Y and y are the same in the above embodiment, they may be different.

[0022]

[Effect of device]

 As described above in detail, according to this invention, it is possible to cut stainless steel, which is a difficult-to-cut material, and it is possible to use it with a conventional circular saw machine, and further, it has an excellent effect that it has a long life.

[Brief description of drawings]

FIG. 1 is a side view of a tip saw for stainless steel according to an embodiment of the present invention.

FIG. 2 is a side view of an essential part of a stainless steel tip saw.

3 (a) is a sectional view taken along line ZZ of FIG. 2 of a stainless steel tip saw, and FIG. 3 (b) is WW of FIG.
It is a line sectional view.

FIG. 4 is a side view of the essential parts of a stainless steel tip saw according to another embodiment of the present invention.

5 (a) and 5 (b) are cross-sectional views of essential parts of a stainless steel tip saw of another embodiment embodying the present invention.

[Explanation of symbols]

2 ... Main body, 2a ... Convex portion, 4 ... Carbide tip, 5 ... Tooth portion, 6
... Front cutting edge, C ... Corner angle.

Claims (1)

[Scope of utility model registration request] 1. A plurality of convex portions (2a) are provided at predetermined intervals along the circumference of a metallic thin disk-shaped main body (2), and the convex portions (2a) each have a cemented carbide tip. In a stainless steel saw having a tooth portion (5) formed by fixing (4), each of the cemented carbide tips (4) is directed toward the center plane of the main body (2) with respect to each of the protrusions (2a). One of the directions orthogonal to, and
Front cutting edge (6), which is alternately projected and attached to the other
Is a tip saw for stainless steel, which is formed so as to have a predetermined corner angle (C).