JPH1119822A - Band saw blade - Google Patents

Abstract

PROBLEM TO BE SOLVED: To equalize the bending resistance at the time of setting and separating work and to equalize the spring back amount of each set tooth after bending the set tooth by setting the bending length of each set tooth at a set bending position at the nearly same length. SOLUTION: Seven teeth, which are arranged with seven different kinds of pitches P1 -P7 , form a group so as to form a band saw blade BS with a variable, pitch. Bending length L of a set bending position j-j line of each set tooth 3-13 is set at the nearly same length. With this structure, bending resistance of each set tooth at the time of setting and separating work becomes nearly equal to each other, and the quantity of spring back after the set bending becomes nearly equal to each other. Plural set teeth 3-13 can be placed at the same time along the set bending position j-j line, and while the separated variable thereof can be easily adjusted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a band saw blade used for a horizontal band saw machine and a band saw machine for a rigid band saw machine.

[0002]

2. Description of the Related Art As an example of a band saw blade BS used in a conventional band sawing machine, for example, as shown in FIGS. 7A and 7B, five different pitches P1 to P5 are arranged. A variable pitch having five teeth a to e as one group is known. In addition, the tooth a is composed of straight teeth with no set, the teeth b and d are composed of right set teeth, and the teeth c and e are composed of left set teeth.

The set teeth b to e shown in FIG.
Are pressed by the pressing indenters f to i to perform set-off processing. Further, as shown in FIG. 7 (B), the line jj indicates the set bending position (the position of the clamp vise which clamps the band saw blade BS when performing the set driving). The bending lengths of the teeth b to e are L _{1 to} L ₄ , all of which have different lengths (L
₁ ≠ L ₂ ≠ L ₃ ≠ L ₄ ).

[0004]

By the way, the basic operation for performing the set-off process is described with reference to FIGS.
This will be described with reference to FIG. FIG. 8 (A), (B), (C)
The figure shows a state in which the sawtooth q is machined to the set amount n by the indenter P at the bending position line j-j. JJ
The line corresponds to the position of the upper surface of the right and left clamp vise B.
8 (A) shows a state in which the indenter P is in contact with the saw tooth q, FIG. 8 (B) shows a state in which the indenter P has reached the stroke end, and FIG. 8 (C) shows an indenter after finishing the set processing. P
Shows a state in which it has returned from the sawtooth q to its original position.

As can be seen from FIGS. 8 (A), 8 (B), and 8 (C), the relationship r> n always exists between the amount r of the pressing indenter P pressing the sawtooth q and the amount n of the set projection. Occurs. The causes of this phenomenon are as follows: (1) The saw tooth q is inclined so as to rotate while the indenter P moves linearly.

(2) The occurrence of springback m.

(3) Tooth deformation (k ₁ -k ₂ ) occurs.

And the like.

Among them, the above (1) is a constant amount even if the tooth tip shape is different, but (2) and (3) are the tooth tip shapes (particularly from the bending position j-j line of the set tooth). If the shape up to the tooth tip is different, the springback m and the deformation amount (k ₁ -k
₂ ), a difference is generated, and the bending length on the bending position line j-j has a great influence.

Therefore, in the conventional variable-pitch band saw blade BS, the tip shape of the set teeth b to e in the tooth group is not constant, and in particular, the bending length L on the bending position j-j line.
Since ₁ ~L ₄ is not constant, the above-mentioned (2), the value and the difference is generated in the (3), to try to clam shaken amount n of each tooth b~e constant, each tooth There is a problem that the protrusion amount of the pressing indenter P must be adjusted independently by b to e.

Further, even if the set teeth b to e are adjusted to have the same set protrusion amount n, the amount of deformation of the tip is different for each tooth due to the difference in the tip shape. There was a problem that had an adverse effect on the entry and exit.

SUMMARY OF THE INVENTION It is an object of the present invention to easily adjust the amount of protrusion of each set tooth and to simultaneously adjust a plurality of sets.
It is another object of the present invention to provide a band saw blade capable of making the tip of each tooth uniform in and out, and furthermore, performing a high-precision oscillating process of the set teeth, thereby extending the life of the band saw blade and improving the cut surface roughness.

[0013] In addition, the needs of users in the market require band saw blades with higher precision than ever before, and band saw blades whose teeth have been polished and finished have appeared.

[0014] In order to manufacture a further ultra-high precision band saw blade in the future, it is indispensable to increase the precision and stabilization of the set piercing process, and to design the tooth profile of the band saw blade in consideration of the plastic deformation during the set piercing process. And the establishment of a manufacturing method is urgently needed.

[0015]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and the invention according to claim 1 is directed to a variable-pitch band saw blade having a plurality of set teeth. The bending length of each set tooth at the set bending position is substantially the same.

By setting the bending length of each set tooth at the bending position to be substantially the same, the bending resistance when performing the set shaping process can be made substantially equal, and the springback amount of each set tooth can be made substantially equal. In addition, a plurality of set teeth can be simultaneously adjusted and pressed along the set bending position, and the adjustment of the swing amount can be easily performed.

According to a second aspect of the present invention, there is provided a variable-pitch band saw blade having a plurality of set teeth, in which the set bending positions of the set teeth are substantially the same in the right and left sets. Because it is long, even if it is a configuration with a plurality of set teeth with different left and right set protrusion amounts, the set teeth with the same left and right set protrusion amounts are set right and left with the same precision. is there.

The invention according to claim 3 is characterized in that, in the invention according to claim 1 or 2, the shape from the set bending position line of each of the set teeth to the tooth tip is substantially the same. Things.

Since the shape of each set tooth from the set bending position line to the tooth tip is substantially the same, the amount of deformation of the tooth tip is substantially the same for each set tooth, and the ingress and egress of each set tooth is uniform. Is done. Accordingly, in combination with the fact that the springback amounts of the set teeth are substantially equal, the set teeth can be more accurately oscillated, and the life of the band saw blade is extended and the cut surface roughness is improved.

[0020] The invention according to claim 4 is based on claim 1,
In the invention described in 2 or 3, the set bending position of each set tooth is located on a straight line.

Therefore, when performing the set bending of each set tooth, it is easy to perform the set bending based on the clamp position by the clamp vise that is clamping the band saw blade.

[0022]

Embodiments of the present invention will be described below in detail with reference to the drawings.

Referring to FIGS. 1A and 1B, there is shown a variable-pitch band saw blade BS in which seven teeth arranged at _seven different pitches P _{1 to} P 7 are formed as one group. I have. Here, seven teeth 1, 3, 5, 7, 9, 1
Of 1 and 13, tooth 1 indicates straight teeth, teeth 3, 7, and 11 indicate left set teeth, and teeth 5, 9, and 13 indicate right set teeth. In addition, the rake angle and the clearance angle of each of the teeth 1 to 13 are all set to be constant, the root R is also fixed to all teeth, and the gullet depth D is set to be constant.

The band saw blade BS has a configuration in which the bending resistance of each set tooth during set bending is substantially equal, and the springback amount of each set tooth after set bending is substantially equal.
Further, it is manufactured so that the deformation amount of each set tooth after set bending is substantially equal.

That is, as shown in FIG. 1B, the line JJ indicates the set bending position, and the bending length L of each set tooth 3 to 13 is all constant. Further, from the set bending position j-j line, each set tooth 3
In this example, the shape of the teeth S to １３13 is constant. The set bending position may be closer to the tooth tip S or closer to the tooth bottom than the line j-j.

Therefore, by setting the bending length L of the set bending position j-j line of each set tooth 3 to 13 to be substantially the same, the bending resistance of each set tooth at the time of performing the set setting process is substantially equal, and The amount of springback after bending is also substantially equal. In addition, the plurality of set teeth 3 to 13 can be simultaneously pressed along the set bending position line j-j, and the amount of deflection can be easily adjusted.

[0027] Incidentally, substantially to each tooth measuring the length L bent in a group of teeth type, when the average value and the L _A, it is the variation of each tooth is within L _A ± 10% desirable.

Also, by making the shape of the set teeth 3 to 13 from the set bending position line jj line to the cutting edge S substantially the same, the amount of deformation of the tooth tip S after the set bending is reduced by the set tooth 3. 13 are substantially the same, and the ingress and egress of each set tooth 3 to 13 can be made uniform.
Accordingly, the amount of springback and the amount of deformation of each set tooth are substantially equal to each other, so that the set teeth can be more uniformly and precisely sunk, and the wear of each tooth on the band saw blade BS can be made uniform and the life can be improved. Up and improvement of cut surface roughness can be achieved.

FIGS. 2A and 2B show an example of the second embodiment, in which seven different pitches P _{1 to} P _{7 are provided.}
7 shows a variable-pitch band saw blade BS in which the seven teeth arranged in are arranged as one group. Of these seven teeth 1, 3, 5, 7, 9, 11, and 13, tooth 1 is a straight tooth,
Teeth 3, 7, 11 indicate left set teeth and 5, 9, 13 indicate right set teeth. Moreover, the rake angle and clearance angle of each tooth 1 to 13 are all constant, and the set bending position j
-The bending length L of each of the teeth 3 to 13 on the -j line is all constant. Unlike each tooth bottom R ₁ to R ₇ are the curvature, the contact of the tooth bottom R than the intersection X ₂ between the intersection X ₁ and flank U and j-j line between rake surface T and j-j line It is set not to be on the tooth tip S side. Therefore, the tip side shape from the line j-j to the tip S is all constant. In addition, the set bending position is the tooth tip S from the JJ line.
It may be close.

[0030] Incidentally, substantially to each tooth measuring the length L bent in a group of teeth type, when the average value and the L _A, it is the variation of each tooth is within L _A ± 10% desirable.

Therefore, in the embodiment shown in FIGS. 2A and 2B, the above-described FIGS.
The same operation and effect as those of the saw blade illustrated in FIG.

FIGS. 3A and 3B show an example of the third embodiment, in which seven different pitches P _{1 to} P _{7 are provided.}
7 shows a variable-pitch band saw blade BS that configures the seven teeth arranged in the above as one group. Of these seven teeth 1, 3, 5, 7, 9, 11, and 13, tooth 1 is a straight tooth,
Teeth 3, 7, 11 indicate left set teeth and teeth 5, 9, 13 indicate right set teeth. The tip-side shapes of the set teeth 3, 5 are equal, and the tip-side shapes of the set teeth 7, 9, 11, 13 are equal. The clearance angles α ₆ , α ₅ at the tips of the tip of the right and left set teeth 3, 5 following the straight tooth 1 are the clearance angles α ₄ , α ₃ , of the other left and right set teeth 7, 9, 11, 13.
It is set smaller than α ₂ and α ₁ . Moreover, since the clam bending position j-j line is not in contact with the tooth bottom R of which set teeth 3 to 13, the j-j line from the intersection X ₂ between rake face line and the j-j line of teeth 3 clams Teeth 7, 9, 11, 13
By taking a point X ₁ at the position of a line segment having the same bending length L as the above, a second clearance angle c is provided from the point X ₁ as shown in FIG. 3 (B), and the teeth 5 are formed in the same manner. The set bending length L of all the set teeth 3 to 13 can be easily set to substantially the same length.

It should be noted, substantially to each tooth measuring the length L bent in a group of teeth type, when the average value and the L _A, it is the variation of each tooth is within L _A ± 10% desirable.

Therefore, in the band saw blade BS shown in FIGS. 3A and 3B, the teeth 3 and 5 are provided with the second clearance angle C so that the teeth of each tooth can be shifted from the set bending position j-j line. Even if the shape leading to the above is different, the bending length L of each tooth is almost equal, and the springback amount after the set bending is almost equal, and the band saw blade BS shown in FIG.
It has almost the same function and effect.

[0035] FIG. 4 (A), (B) is shown an example of the fourth embodiment, a structure of seven teeth arranged in seven pitch P ₁ to P ₇ as a group A variable pitch band saw blade BS is shown. These seven teeth 1,
Of 3, 5, 7, 9, 11, and 13, tooth 1 indicates straight teeth, teeth 3, 7, and 11 indicate left set teeth, and teeth 5, 9, and 13 indicate right set teeth. The teeth 3 and 5 have the same tip shape, and the teeth 7, 9, 11 and 13 have the same tip shape. The rake angles θ ₆ and θ ₅ of the right and left set teeth 3 and 5 following the straight tooth 1 are the other set of left and right set teeth 7, 9, 11 and 1.
3, which are smaller than the rake angles θ ₄ , θ ₃ , θ ₂ , and θ ₁ .

[0036] Moreover, clams bending position because j-j line is not in contact with the tooth bottom R of which set teeth 3 to 13, j-j line from the intersection X ₂ between rake face line and the j-j line of the teeth 3 take a point X ₁ to the position of the line segment of the same bending length L and set teeth 7, 9 and 11, the provided as showing a second clearance angle c from X ₁ point in FIG. 4 (B), the teeth 5 also By using the same method, the set bending length L of all the set teeth 3 to 13 can be easily set to substantially the same length.

[0037] Incidentally, substantially to each tooth measuring the length L bent in a group of teeth type, when the average value and the L _A, it is the variation of each tooth is within L _A ± 10% desirable.

Therefore, in the band saw blade BS shown in FIGS. 4A and 4B, the teeth 3 and 5 are provided with the second clearance angles C so that the teeth of each tooth can be shifted from the set bending position j-j line. Even in the case of different shapes, the bending length L of each tooth can be made substantially equal, the springback amount after set bending becomes almost equal, and the operation and action substantially the same as those of the band saw blade BS shown in FIG. It is effective.

FIGS. 5A and 5B show an example of the fifth embodiment, in which five different pitches P _{1 to} P _{5 are provided.}
5 shows a variable-pitch band saw blade BS in which the five teeth arranged in are arranged as one group. Of these five teeth 15, 17, 19, 21, 23, tooth 15 is a straight tooth,
Teeth 17 and 21 indicate right set teeth, and teeth 19 and 23 indicate left set teeth.

The straight teeth 15, right set teeth 17, 21 and left set teeth 19, 23 all have the same clearance angle and rake angle, but the curvature of the roots R _{1 to} R ₅ is the same for all the teeth. Is different. Since the set bending position j-j line is in contact with the tooth bottom R on the rake face T side, the flank face line and j
Take a point X ₁ to the position of the line segment intersection X ₂ from j-j line to the length L of the -j line, tooth bottom that passes through the point X ₁ together with contact with the rake face T line and flank U line By setting R, the set bending length L of all the set teeth 17 to 23 can be set to substantially the same length.

It is to be noted that when the bending length L in one group of the tooth form is measured for each tooth and the average value is defined as L _A , the variation of each tooth may be within L _A ± 10%. desirable.

Therefore, the band saw blade BS shown in FIGS. 5A and 5B has substantially the same operation and effect as the band saw blade BS shown in FIG.

FIGS. 6A and 6B show an example of the sixth embodiment, in which a variable pitch in which eight teeth arranged at eight types of pitches P1 to P8 are formed as one group. Is shown. In the band saw blade BS, the teeth 25 and 33 are straight teeth, the teeth 27, 31, and 37 are left set teeth, and the teeth 29, 35, and 39 are right set teeth.

Then, the left set teeth 27 and the right set teeth 39
Have a small set-projection amount, and are equally formed on the tooth tip side from the set-bending position line j-j, and the bending length L1 at the set-bending position is equal. The set projecting amounts of the left and right set teeth 29, 31, 35, 37 are larger than the set projecting amounts of the left and right set teeth 27, 39, and the set bending position j− of each set tooth 29, 31, 35, 37.
The shapes on the tooth tip side from the j-line are equal, and the bending length L2 at the set bending position is equal.

That is, in this embodiment, the tip side shape and the set bending length of each set tooth having the same left and right set protrusion amounts are provided to be equal. Therefore, even in a configuration including a plurality of set teeth with different left and right set protrusion amounts, since the left and right set teeth with the same set protrusion amount in the left and right direction have the same tooth tip side shape and set bending length,
The clams are accurately and equally projected in the left and right directions.

It is to be noted that the bending length L of the teeth having substantially the same set projection amount within one group of the tooth mold is measured for each tooth.
When the average value and the L _A, the variation of each tooth L _A ± 1
It is desirable to be within 0%.

The band saw blade B shown in FIGS.
In S, the tip side shape of all the teeth may be equal, the set bending length may be equal, and the set projection amount of all set teeth may be equal.

In the embodiment shown in FIGS. 1 to 6, the direction of arrow v indicates the running direction of the band saw blade BS, and the direction of arrow w indicates the cutting direction for a workpiece (not shown).

In the embodiment shown in FIGS. 1 to 6, an example of a variable-pitch band saw blade in which one group is composed of five teeth or seven teeth and eight teeth is shown. The number of teeth and the set pattern can be arbitrarily set as appropriate.

The present invention is not limited to the above-described embodiment, but can be implemented in other modes by making appropriate changes. For example, the arrangement of the set bending positions in each set tooth may be not linear but may be stepped.

[0051]

As will be understood from the above embodiments, according to the first aspect of the present invention, by setting the bending length of the set bending position of each set tooth to be substantially the same, The bending resistance at the time of performing the set shaping process is substantially equal, and the springback amount of each set tooth after bending the set tooth can be set substantially equal. In addition, a plurality of set teeth can be simultaneously pressed along the set bending position, and the amount of deflection can be easily adjusted.

According to a second aspect of the present invention, there is provided a variable-pitch band saw blade having a plurality of set teeth, wherein the set bending positions of the set teeth are substantially the same in the right and left sets. Because it is long, even if it is a configuration with a plurality of set teeth with different left and right set protrusion amounts,
The set teeth whose left and right set protrusion amounts are equal to each other are set right and left accurately.

According to the third aspect of the present invention, the shape of each set tooth from the set bending position line to the tooth tip is substantially the same, so that the amount of deformation of the tooth tip is substantially the same for each set tooth. Thus, the ingress and egress of each set tooth can be made uniform. Therefore, combined with the fact that the springback amount of each set tooth is almost equal, more uniform and high precision oscillating of the set tooth can be achieved, and the wear of the set tooth on the band saw blade can be made uniform to extend the life and cut. The surface roughness can be improved.

The invention according to claim 4 is based on claim 1,
In the invention described in 2 or 3, since the set bending position of each set tooth is located on a straight line, when performing set bending of each set tooth, the clamping position by the clamp vise that is clamping the band saw blade is set. The set can be easily bent as a reference.

As described above, in any of the claims, it is possible to easily perform high-precision set-off processing, and realize an improvement in cut surface roughness and a longer life in response to user needs in the market.

[Brief description of the drawings]

FIGS. 1A and 1B are explanatory views of an example of an embodiment of a band saw blade according to the present invention.

FIGS. 2A and 2B are explanatory diagrams of an example of a second embodiment of the band saw blade according to the present invention.

FIGS. 3A and 3B are explanatory views of an example of a third embodiment of the band saw blade according to the present invention.

FIGS. 4A and 4B are explanatory diagrams of an example of a fourth embodiment of the band saw blade according to the present invention.

FIGS. 5A and 5B are explanatory diagrams of a band saw blade according to a fifth embodiment of the present invention.

FIGS. 6A and 6B are explanatory views of a band saw blade according to a sixth embodiment of the present invention.

FIGS. 7A and 7B are explanatory views showing a configuration of a conventional band saw blade and a set hammer;

FIGS. 8A, 8B, and 8C are explanatory diagrams for performing set-swinging processing with a band saw blade.

[Explanation of symbols]

1,15,25,33, a Straight teeth 3,7,11,19,23,27,31,37, e, c
Left set tooth 5, 9, 13, 17, 21, 29, 35, 39, a, b
Right Set Teeth BS Band Saw Blade JJ Line Set Bend Position R, R ₁ -R ₇ Curvature of Bottom L, L ₁ , L ₂ , L ₃ , L ₄ Set Bend Length S Tip Tip P ₁ -P ₈ Pitch V running direction W cutting direction D gullet depth f, g, h, i, p clams punch indenter q sawtooth n clams drawer amount B clamping vice r punch indenter P pushes the saw blade q amount m springback value K ₁ ObiAtsu K ₂ tooth tip thickness after set α ₁ -α ₆ clearance angle C 2nd clearance angle X ₁ , X ₂ points

Claims (4)

[Claims] 1. A band saw blade having a plurality of set teeth and having a variable pitch, wherein the bent length of each set tooth at a set bending position is substantially the same. 2. A variable-pitch band saw blade having a plurality of set teeth, wherein a set bending position of each set tooth having substantially equal left and right set protrusion amounts is substantially the same length. Band saw blade. 3. The method according to claim 1, wherein
A band saw blade, wherein the shape of each set tooth from the set bending position line to the tooth tip is substantially the same. 4. The band saw blade according to claim 1, wherein the set bending position of each set tooth is located on a straight line.