WO2022030411A1

WO2022030411A1 - Band saw blade

Info

Publication number: WO2022030411A1
Application number: PCT/JP2021/028465
Authority: WO
Inventors: 優二増田
Original assignee: 株式会社アマダ; 株式会社アマダマシナリー
Priority date: 2020-08-07
Filing date: 2021-07-30
Publication date: 2022-02-10
Also published as: JP2022030425A

Abstract

A band saw blade (10), which forms an endless saw blade of a predetermined length L from a hoop material, includes, in hoop material state, a plurality of dents (18) formed on a saw back (10b) along a moving direction of the saw blade, and a flat portion (20) for separating one dent (18) from another dent (18). The flat portion (20) forms an oscillation start and an oscillation end of a predetermined cycle, and has a length that allows for endless-welding to form the endless saw blade of the predetermined length.

Description

Band saw blade

This disclosure relates to a band saw blade.

In recent years, there has been an increasing demand for high-speed cutting of work materials made of difficult-to-cut materials such as super heat-resistant alloys or large work materials. In order to meet the demand, a band saw blade (hereinafter referred to as a swing band saw blade) that combines an uphill slope and a downhill slope on the back side of the saw has been developed (see Patent Document 1). A brief description of the configuration of the swing band saw blade is as follows.

Patent Document 1 continuously forms a saw back of a plurality of concave portions on the saw back of a swinging band saw blade along the longitudinal direction (longitudinal direction of the band saw blade). Each recess is composed of a first inclined surface that widens the band width in the traveling direction of the saw blade and a second inclined surface that narrows the band width in the traveling direction of the saw blade.

According to the above configuration, when the backup roller of the saw blade guide device presses the saw spine, the band saw blade cuts while swinging in the vertical direction with respect to the work material. As a result, the cutting length of the band saw blade can be shortened, and the cutting resistance of the work material can be reduced. As a result, it is possible to cut a work material made of a difficult-to-cut material or a large work material at high speed while extending the life of the band saw blade.

The manufacturing procedure of the swing band saw blade is as follows. The band saw blade in the state of the hoop material that has been geared is cut according to the product length, and both end faces of the band saw blade are abutted and endless welded to form an endless shape. After that, a plurality of recesses are formed in the saw back of the band saw blade by molding the saw back.

In addition to Patent Document 1, there are prior arts related to the present disclosure shown in Patent Document 2 and Patent Document 3.

Japanese Patent No. 64677737 Japanese Patent No. 4529032 Japanese Patent No. 3265217

By the way, if the saw blade is formed (tilted) before the endless welding of the swing band saw blade, the band width dimension of the joint may be different, and it becomes difficult to perform the endless welding with high accuracy. Therefore, in order to perform endless welding with high accuracy, it is common to perform saw blade forming after endless welding. However, the processing procedure in which the saw blade is formed one by one after the endless welding of the swing band saw blade is compared with the case where the gear cutting and the saw back forming are continuously performed before the endless welding. The processing efficiency of the molding process is extremely low, and it is difficult to increase the productivity of the swing band saw blade. Therefore, it is difficult to perform endless welding with high accuracy while improving the productivity of the swing band saw blade.

By the way, the above-mentioned problem also occurs in the vibration band saw blade as shown in Patent Document 2 and Patent Document 3, for example. A plurality of uneven portions including recesses are formed along the longitudinal direction on the saw spine of the vibrating band saw blade. The coincidence and difference between vibration and vibration are defined as follows. The coincidence point is an operation that reciprocates at a predetermined frequency and a predetermined amplitude, and the difference is a comparative theory. It will be called rocking. That is, the definition is that the vibration is fluctuating and swaying, and the vibration is swaying in small steps, which is replaced with the cutting action of the saw blade.

Therefore, the present disclosure provides a band saw blade having a novel configuration capable of performing endless welding of the band saw blade with high accuracy while improving the productivity of the swing band saw blade or the vibration band saw blade.

The band saw blade according to one or more embodiments of the present application is a band saw blade that constitutes an endless saw blade having a predetermined length from a hoop material, and is a saw blade along the traveling direction of the saw blade from the state of the hoop material. It is provided with a plurality of recesses configured in the above and a flat portion (plane spacing portion) for separating the recess and the recess. The flat portion constitutes a swing start and a swing end of a predetermined cycle, and the flat portion constituting the predetermined cycle has a length capable of endless welding so as to form an endless saw blade having the predetermined length. There is a flat portion to have.

According to one or more embodiments of the present application, the band width dimension of the joint portion for endless welding is kept constant even if the saw blade is formed after the gear cutting process in the state of the hoop material. Therefore, endless welding can be performed with high accuracy while improving the productivity of the oscillating band saw blade or the oscillating band saw blade.

FIG. 1 is a schematic view showing a band saw blade according to the first embodiment. FIG. 2 is a schematic view showing a part of the band saw blade according to the first embodiment. FIG. 3 is a schematic view showing a part of a band saw blade in the state of a hoop material in which a plurality of flat portions are arranged along the traveling direction of the saw blade at intervals of a predetermined length so as to be the first product length. FIG. 4 is a schematic view showing a state in which endless welding of the band saw blade according to the first embodiment is performed. FIG. 5 is a schematic view showing a manufacturing process of the band saw blade according to the first embodiment. FIG. 6 is a conceptual diagram showing a state of the hoop material of the band saw blade according to the second embodiment.

Hereinafter, the first embodiment and the second embodiment will be described with reference to the drawings.

In the specification and claims of the present application, the "band width direction" means a direction orthogonal to the traveling direction (longitudinal direction) of the saw blade of the band saw blade. "Strip width dimension" means a dimension in the band width direction. In the drawing, "DM" refers to the traveling direction of the saw blade.

(First Embodiment)
FIG. 1 is a schematic view showing a band saw blade according to the first embodiment. FIG. 2 is a schematic view showing a part of the band saw blade according to the first embodiment. FIG. 3 is a schematic view showing a part of a band saw blade in the state of a hoop material in which a plurality of flat portions are arranged along the traveling direction of the saw blade at intervals of a predetermined length so as to be the first product length. The band saw blade 10 according to the first embodiment is a band saw blade 10 constituting an endless saw blade having a predetermined length L from a hoop material, and from the state of the hoop material, the saw blade 10b is formed along the traveling direction of the saw blade. A plurality of configured recesses 18 and a flat portion 20 for separating the recess 18 and the recess 18 are provided, and the flat portion 20 constitutes swing start and swing end in a predetermined cycle, and has no end of the predetermined length. It has a length that can be endlessly welded to form a saw blade.

Further, the flat portion 20 constituting the endless saw blade having a predetermined length L provided in the band saw blade 10 according to the first embodiment can abut on the pair of side gauges 26 of the welding machine 24 when performing endless welding. The length is set.

Further, the flat portion of the band saw blade 10 according to the first embodiment, which constitutes the endless saw blade having a predetermined length L, is arranged so as to form 20 and at least one endless saw blade having a predetermined length L. There is.

Further, an endless weldable position P is marked on the band width flat portion F perpendicular to the flat portion 20 constituting the endless saw blade having a predetermined length L, which is provided in the band saw blade 10 according to the first embodiment. ..

As shown in FIGS. 1 to 3, the band saw blade 10 according to the first embodiment is a swing band saw blade used when cutting a work material (metal work) with a band saw (not shown). Further, the band saw blade 10 includes a body portion 12 made of alloy steel having high toughness, and a blade portion 14 made of high-speed tool steel (high-speed steel), cemented carbide, cermet, ceramics and the like. The blade portion 14 has a plurality of saw teeth 16 continuously formed along the traveling direction of the saw blade, and the plurality of saw teeth 16 have a tooth tip 10t of the band saw blade 10. For convenience of explanation, the saw blades 16 are exaggerated and shown, and the actual number of saw blades 16 is much larger than the number of saw blades 16 in the drawing. The band saw blade 10 has a saw back 10b on the opposite side of the tooth tip 10t side. If the hoop material is cut to a predetermined length L and both ends thereof are endlessly welded, the hoop material becomes endless and the joint portion 10j is formed. That is, the band saw blade 10 is a band saw blade that constitutes an endless saw blade having a predetermined length L from the hoop material.

In the saw spine 10b, a plurality of recesses 18 are continuously formed along the traveling direction of the saw blade by forming the saw spine. The recess 18 is composed of a first inclined surface 18a that widens the band width in the traveling direction of the saw blade and a second inclined surface 18b that narrows the band width in the traveling direction of the saw blade. When the band saw blade 10 is mounted on the band saw machine, when the backup roller of the saw blade guide device presses the saw back 10b, the band saw blade 10 swings and cuts with respect to the work material due to the inclination thereof. For convenience of explanation, the recess 18 is exaggerated and shown, and the actual maximum recess amount of the recess 18 is extremely small compared to the band width dimension of the band saw blade 10, for example, about 1.0 mm.

Note that, instead of forming the plurality of recesses 18 continuously along the traveling direction of the saw blade, they may be formed at intervals. Further, the first inclined surface 18a and the second inclined surface 18b may be curved surfaces instead of being flat. Further, a flat surface (not shown) may be formed between the first inclined surface 18a and the second inclined surface 18b of the recess 18.

The band saw blade 10 is formed by cutting a hoop material to a predetermined length L and endlessly welding both ends thereof to form an endless band saw blade (endless saw blade). As shown in FIG. 3, the saw blade 10b of the hoop material has a first inclined surface 18a and a second inclined surface 18b so that the band width dimension to be welded becomes constant when the hoop material is cut to a predetermined length L. It is provided with a plurality of flat portions 20 having no recess 18 configured. The flat portion 20 separates the recess 18 from the recess 18. Further, the flat portion 20 has a length necessary for performing endless welding, that is, even if the welded portion raised by applying pressure during welding is polished, the circumference of the welded portion is not affected. The length is secured.

FIG. 3 shows that the distance between the two flat portions 20 in the state of the hoop material is the first product length L1 of the band saw blade 10. However, there may be a plurality of flat portions 20 within a distance corresponding to the product length. The configuration of the saw blade 16 partitioned by the flat portion 20 and the configuration of the recess 18 have a predetermined cycle constituting the swing start and swing end of the band saw blade 10. The band saw blade 10 has an endless cycle formed by a plurality of configurations of the saw blade 16 partitioned by the flat portion 20 and a plurality of small configurations of the recess 18.

The band width flat surface portion F perpendicular to the flat portion 20 corresponding to the predetermined length L, which is the product length, includes a planned welding portion P capable of endless welding, and the band width flat surface portion F is visually observed with a satin finish or the like. Marks may be added so that they can be used. In addition, in order to explain the estimated position of the welded portion in an easy-to-understand manner on the drawing, hatching dots are added for convenience. Further, the index 22 may be marked on the band width flat surface portion F, for example, by an inkjet method in order to indicate a position where endless welding is possible (planned welding location P). As the marking, another method such as a laser marking method may be used instead of the inkjet method.

The length of the saw blade of the flat portion 20 in the traveling direction shown in FIGS. 3 and 4 is such that when the endless welding is performed to make the band saw blade 10 endless, the flat portion 20 is subjected to a pair of side gauges 26 of the welding machine 24. The length is set so as to be in contact with the center gauge 28 and fixed to the pair of electrode vices 30 of the welding machine 24.

Here, with reference to FIG. 4, the endless welding of the band saw blade 10 will be briefly described. FIG. 4 is a schematic view showing a state in which endless welding of the band saw blade according to the first embodiment is performed. As shown in FIG. 4, the flat portions 20 corresponding to the product length L of the band saw blade 10 are brought into contact with the pair of side gauges 26, and both end faces of the band saw blade 10 are brought into contact with the center gauge 28 to form a pair. The electrode vise 30 of the above clamps both ends of the band saw blade 10. After that, the center gauge 28 is moved away from between both end faces of the band saw blade 10, and the pair of electrode vices 30 press the both end faces of the band saw blade 10 against each other while energizing and heating, and the band saw blade 10 is welded endlessly. Instead of bringing the flat portion 20 of the band saw blade 10 into contact with the pair of side gauges 26, the tooth tips 10t of the band saw blade 10 may be brought into contact with the pair of side gauges 26, but the flat portions 20 are brought into contact with each other. The stability of the welding work is inferior to that of the case where the welding work is performed.

Next, the action and effect of the first embodiment will be described.

As shown in FIGS. 3 and 4, the flat portion 20 corresponding to the product length L secures a length in which a planned welding portion P, a center gauge 28, a pair of electrode vices 30, and a pair of side gauges 26 can be arranged. is doing. As a result, both flat portions 20 perpendicular to both end faces of the hoop material are kept horizontal in a aligned state, and a welded surface perpendicular to the flat portions 20 can be obtained.

FIG. 5 is a schematic diagram showing a manufacturing process of the band saw blade according to the first embodiment. As shown in FIG. 5, even if the saw blade is formed in the state of the hoop material after the gear cutting process, the band width dimension of the joint portion of the endless weld can be kept constant. Here, the gear cutting process includes the machining process of the plurality of saw teeth 16.

Therefore, according to the first embodiment, since the saw back can be formed after the gear cutting, the productivity of the band saw blade (swing band saw blade) 10 from the hoop material can be improved. .. Further, by providing a dedicated endless welding portion, endless welding of the band saw blade 10 can be performed with high accuracy. In particular, since the flat portion 20 is set to a length that allows contact with the center gauge 28 and the pair of side gauges 26, endless welding of the band saw blade 10 can be performed with higher accuracy.

Further, since the index 22 indicating the position where endless welding is possible (planned welding point P) is marked on the flat band width F perpendicular to the flat part 20, the operator can easily recognize the position of the planned welding point P. , The manufacturing efficiency of the band saw blade 10 can be increased.

(Second Embodiment)
FIG. 6 is a conceptual diagram showing a state of the hoop material of the band saw blade according to the second embodiment. As shown in FIG. 6, the band saw blade 10A according to the second embodiment includes a plurality of first flat portions 32 and second flat portions 34 that form a part of the saw back 10b in the state of the hoop material. .. The plurality of first flat portions 32 are arranged along the traveling direction of the saw blade at intervals of the first product length L1. The plurality of second flat portions 34 are arranged along the traveling direction of the saw blade at intervals of the second product length L2. In other words, this hoop material is configured by coexisting a pattern in which n plurality of recesses 18 are connected and a pattern in which m not n plurality of recesses 18 are connected. Any first flat portion 32 also serves as a second flat portion 34. In addition, a plurality of first flat portions 32 and second flat portions 34 may be provided within a distance corresponding to the product length.

The first band width flat surface portion F1 perpendicular to the first flat portion 32 corresponding to the first product length L1 includes a first planned welding portion P1 capable of endless welding. The second width plane portion F2 perpendicular to the second flat portion 34 corresponding to the second product length L2 includes a second planned welding portion P2 capable of endless welding. Depending on the combination, any of the first band width plane portions F1 can also serve as the second band width plane portion F2.

Therefore, according to the configuration of the second embodiment, in addition to having the same effect as that of the first embodiment described above, two types of band saw blades (endless saw blades) having different product lengths or combination patterns depending on the state of the hoop material. ) Can be taken out, and the versatility of the band saw blade 10A in the state of the hoop material can be enhanced.

It should be noted that the present disclosure is not limited to the description of the first embodiment and the second embodiment described above, and for example, the technical idea applied to the band saw blade 10 which is a swing band saw blade is applied to the vibration band saw blade (not shown). It can be implemented in various modes by making appropriate changes such as applying to. The scope of rights included in the present disclosure is not limited to the above-mentioned first embodiment and the second embodiment.

The disclosure of this application is related to the subject matter described in Japanese Patent Application No. 2020-134461 filed on August 7, 2020, all of which are incorporated herein by reference.

Claims

A band saw blade that constitutes an endless saw blade of a predetermined length from a hoop material.
From the state of the hoop material, a plurality of recesses formed on the back of the saw along the traveling direction of the saw blade, and a flat portion for separating the recess from the recess are provided.
The flat portion constitutes a swing start and swing end of a predetermined period, and has a length that can be endlessly welded so as to form an endless saw blade having a predetermined length.
The band saw blade according to claim 1, wherein the flat portion constituting the endless saw blade having a predetermined length is set to a length that allows contact with a pair of side gauges of a welding machine when performing endless welding. ..
The band saw blade according to claim 1 or 2, wherein the flat portion constituting the endless saw blade of the predetermined length is arranged so as to form at least one endless saw blade of the predetermined length.
The aspect according to any one of claims 1 to 3, wherein a position where endless welding is possible is marked on the band width flat portion perpendicular to the flat portion constituting the endless saw blade having a predetermined length. Band saw blade.