JP2517950Y2 - Saw blade - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a saw blade used for a band saw machine, a circular saw machine, a hack saw, a hole saw, and the like.

(Prior Art) Conventionally, the flank of the saw blade is 1 as shown in FIG. 9 (a).
It is composed of a flat surface, and is composed of two flat surfaces having a first flank and a second flank as shown in FIG. 9 (b). Further, as shown in FIG. 9 (c), 1 It is composed of curved surfaces. In addition, in order to prevent chipping from occurring during cutting, the length 1 of the first flank in the flank direction is relatively long.

(Problems to be solved by the invention) However, in the saw blade as shown in FIGS. 9 (a) and 9 (c) as described above, the flank has one plane or one curved surface, and the flank has a flank. Since the length in the surface direction is long, the wear of the flank surface increases from the cutting edge toward the flank surface as the cutting process progresses, and the cutting resistance generated during cutting increases. As a result, cutting and bending shorten the life of the saw blade,
There was a problem that the noise increased and the work efficiency deteriorated.

Further, also in the saw blade as shown in FIG. 9 (b), since the length of the first flank is relatively long as described above, the same problem as described above occurs.

Then, this invention aims at providing the saw blade which can solve the said problem.

[Structure of the Invention] (Means for Solving the Problems) In view of the conventional problems as described above, the present invention is a saw blade including a rake face and a flank, and the rake face and the flank intersect each other. The first recess is provided in the flank at a position smaller than the cutting edge, and the second recess deeper than the first recess is provided in the flank at a position larger than the cutting edge. The wear lengths of the flanks of the saw blade are approximately equal to the wear length of the work material of the target material.

(Example) Hereinafter, the Example which concerns on this invention is described based on drawing.

Referring to FIGS. 1 and 2, a saw blade 1 shown as a reference example is provided with a flank 3 and a rake face 5, and the flank 3 is formed by one plane. In addition, in order to prevent the cutting resistance during cutting from increasing, the flank 3 is provided under a predetermined clearance angle.

The flank 3 is provided with a recess 7, and the length a from the cutting edge of the saw blade 1 to the recess 7 is longer than the flank wear length (wear length in the flank direction) in the life of the saw blade 1. It's short. Here, the flank wear length differs depending on the material of the work material, and the above-mentioned a is also set in advance corresponding to the material of the predetermined work material. The length of the recess 7 in the flank direction is b, and the depth of the recess 7 is c.

Here, the sizes of a, b, and c are set depending on the material of the work material. For example, in the case of cutting stainless steel, the saw blade 1 has a life due to a relatively small amount of wear.
Since a, b, and c are made small and the saw blade 1 reaches the end of its life due to a relatively large amount of wear when cutting die steel,
b and c are increased. The sizes of a and c are set by the strength of the cutting edge of the saw blade 1, and if a is small and C is large, it causes chipping.

The shape of the recess 7 is not limited to that shown in FIGS. 1 and 2, and is, for example, FIG. 3 (a).
A triangular shape as shown in Fig. 3, Fig. 3 (b)
It does not matter if it has an arcuate shape as shown in Fig. 3 or it extends relatively long in the flank direction as shown in Fig. 3 (c).

With the above configuration, by appropriately operating the saw blade 1, it is possible to perform a desired cutting process on the work material. In this embodiment, the length a from the cutting edge to the recess 7 is a.
Is shorter than the wear length of the flank wear length during the life of the saw blade 1 in the flank face direction, the wear length of the flank face 3 in the flank face during cutting is greater than that of a during cutting. It won't be long.

According to the above-mentioned reference example, since the wear length of the flank 3 in the flank direction during cutting is not longer than a, it is possible to suppress an increase in cutting resistance as much as possible. Therefore, the saw blade 1 is less likely to be bent or bent during cutting, the life of the saw blade is extended, and the noise caused by cutting is reduced, thereby improving the working efficiency.

Referring to FIG. 4, the saw blade 1 shown in FIGS. 1, 2, and 3 (a), (b), (c) has a flank surface of one plane, The saw blade 9 has a first flank 11 and a second flank
It has a flank that consists of two planes (13). The second clearance angle is larger than the first clearance angle, and the first clearance angle is set to a predetermined angle based on the strength of the cutting edge. If the length of the first flank 11 in the first flank direction is short, chipping is likely to occur, so the length in the first flank direction is set to a predetermined length.

The first flank 11 is provided with a recess 15 similar to the recess 7, and the length from the cutting edge to the recess 15 is the flank wear length during the life of the saw blade 9 (first flank direction). Wear length of) is shorter than.

Even in the case of the saw blade 9, the same action and effect as those of the saw blade 1 are obtained.

Referring to FIG. 5, the flank of the saw blade 1 has one plane and the flank of the saw blade 9 has two planes, while the flank of the saw blade 17 has one curved surface. The recess 21 is also provided on the flank 19 of the saw blade 17, and the saw blade 17 also has the same operation and effect as the saw blades 1 and 9.

Although the case where one recess is provided in the flank has been described above, the case where a plurality of recesses are provided in the flank will be described below.

Referring to FIGS. 6 and 7 showing an embodiment of the present invention,
The saw blade 23 has a flank 25 and a rake face 27, and the flank 25 is composed of one plane. The flank 25 is provided with a first recess 29 and a second recess 31 from the cutting edge side. The length e from the cutting edge to the first concave portion 29 is shorter than the flank wear length at the time of life in stainless cutting, and the length f from the cutting edge to the second concave portion 29 is the length at the life in cutting die steel. It is shorter than the flank wear length. The depth g of the first recess 29 is smaller than e by comparing the strength of the cutting edge, and the depth h of the second recess 31 is h
Is smaller than.

The first concave portion 29 and the second concave portion 31 may be provided adjacent to each other as shown in FIG. 8 (a),
The shapes of the first concave portion 29 and the second concave portion 31 may be triangular as shown in FIG. 8 (b), and the number of concave portions is three as shown in FIG. 8 (c). Even if it is above, it does not matter.

With the above-described configuration, by appropriately operating the saw blade 23, it is possible to perform a predetermined cutting process on a work material (in this embodiment, the material is stainless steel or die steel).

In the above cutting process, the length e from the cutting edge to the first recess 29 is made shorter than the flank wear length at the end of life in stainless cutting, so that the flank 25 wear length in the flank 25 during stainless cutting. Is not longer than the above e. Further, by making the length f from the cutting edge to the second recess 31 shorter than the flank wear length at the end of life in die steel cutting, the flank wear length in the flank 25 during die steel cutting is It is never longer than the above f. In the die steel cutting, the flank 25 is heavily worn, so that the first recess 31 is reduced by the wear.

As described above, the wear length of the flank face 25 in the flank face during the cutting of stainless steel does not become longer than e, and the wear length of the flank face 23 in the flank face during cutting of die steel does not become larger than f. It is possible to suppress the increase in resistance as much as possible. Therefore, the saw blade 23 is relatively unlikely to be bent during the cutting of stainless steel or die steel, the life of the saw blade is extended, the noise due to cutting is reduced, and the working efficiency is improved. For example, e = 0.15 mm, f = 0.
When a cutting test was performed on a workpiece made of die steel under the conditions of 3 mm, g = 0.1 mm, h = 0.25 mm, the 1 recess
29, the life of the saw blade 23 provided with the second recess 31 is extended to 1.3 times. In addition, when the cutting test was performed on the slantless work material, the life was extended up to 1.5 times.

Further, the flank 25 of the saw blade 23 has a first recess 29 and a second recess 31.
By providing the above, the life of the saw blade 23 can be extended even when cutting is performed on either the work material made of stainless steel or the work material made of die steel.

The present invention is not limited to the description of the above embodiment, but can be implemented in various modes by making appropriate changes.

[Effects of the Invention] As will be understood from the above description of the embodiments, in short, the present invention is a saw blade including a rake face (27) and a flank face (25), in which the rake face (27) Flank (2
5) A first recess (29) is provided in the flank (25) at a position of a small dimension (e) from the cutting edge intersecting with the cutting edge, and a flank (25) is provided at a position of a large dimension (f) from the cutting edge. First
A second recess (31) deeper than the recess (29) is provided, and the small dimension (e) and the large dimension (f) are the flank wear length at the life of the saw blade with respect to the work material of the target material, respectively. It is provided almost equal to the above.

As is apparent from the above configuration, in the present invention, the first recess 29 is provided on the flank 25 of the saw blade at a position of a small dimension e from the cutting edge.
Is formed, and the first concave portion is provided at the position of the large dimension f from the cutting edge.
A second recess 31 that is deeper than 29 is formed. The small dimension e and the large dimension f are substantially equal to the flank wear length of the saw blade with respect to the work material of the target material at the time of its life.

Therefore, according to the present invention, for example, stainless steel is cut as a work material, and the flank wear length of the cutting edge becomes e,
Even if stainless steel has a life, it can be used next for cutting die steel, for example, and the life of the saw blade will be reached when the flank wear length of the cutting edge becomes f.

That is, the first concave portion 29 and the second concave portion 31 are formed on the flank of the saw blade.
Even if it has been used for cutting stainless steel and has reached the end of its service life, it can still be reused for cutting die steel, for example, to extend the life of the saw blade. It can be achieved.

[Brief description of drawings]

The drawings are for explaining the embodiments according to the present invention.
The figure is a perspective view of a saw blade having a recess on the flank. FIG. 2 is a front view of a saw blade having a recess on the flank. 3 (a), (b), and (c) are front views of a saw blade in which the shape of the recess is changed. FIG. 4 is a front view of a saw blade in which a recess is provided in a flank formed by two planes. Fifth
The figure is a front view of a saw blade in which a recess is provided in a flank formed by one curved surface. FIG. 6 is a perspective view of a saw blade having two recesses on the flank. FIG. 7 is a front view of a saw blade having two recesses on the flank. 8 (a), (b),
(C) is a front view of the saw blade when the aspect of a some recessed part is changed. 9 (a), (b) and (c) are front views of a conventional saw blade. 1.9.17.23 …… Saw blade, 3.25 …… Flanking surface 11 …… First flank surface, 13 …… Second flank surface 7.15.19 …… Recess, 29 …… First recess 31 …… Second recess

Claims (1)

(57) [Scope of utility model registration request] 1. A saw blade comprising a flank (25) of a rake face (27), at a position of a small dimension (e) from the cutting edge where the rake face (27) and the flank (25) intersect. A first recess (29) is provided in the flank (25), and a second recess (31) deeper than the first recess (29) is provided in the flank (25) at a position of a large dimension (f) from the cutting edge. The saw blade, wherein the small dimension (e) and the large dimension (f) are substantially equal to the flank wear length of the saw blade during the life of the work material of the target material.