JP4362154B2 - Band saw blade - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a band saw blade used for a band saw machine of a horizontal type band saw machine or a solid type band saw machine.
[0002]
[Prior art]
As an example of a band saw blade BS used in a conventional band saw machine, for example, as shown in FIGS. 7A and 7B, for example, five teeth a to 5 arranged at five different pitches P1 to P5. A variable pitch type with e as one group is known. Moreover, the a tooth is a straight tooth without hitting a set, the b and d are right set teeth, and the c and e teeth are left set teeth.
[0003]
Each of the set teeth b to e shown in FIG. 7 (A) is subjected to a settling out process by being pressed by the press tools f to i. Moreover, as shown in FIG. 7B, the jj line shows the set bending position (the position of the clamp vise that clamps the band saw blade BS when performing the hitting operation). The bending lengths of the teeth b to e are L _{1 to} L ₄ and are all different in length (L ₁ ≠ L ₂ ≠ L ₃ ≠ L ₄ ).
[0004]
[Problems to be solved by the invention]
By the way, a basic operation for performing the clasping out process will be described with reference to FIGS. 8 (A), (B), and (C). FIGS. 8A, 8B, and 8C show a state where the sawtooth q is processed into a set amount n by the hammer P at the bending position jj. The jj line corresponds to the position of the upper surface of the left and right clamp vise B. That is, FIG. 8A shows a state in which the hammer P is in contact with the sawtooth q, FIG. 8B shows a state in which the hammer P has reached the stroke end, and FIG. The state where P has moved away from the saw blade q and returned to the original position is shown.
[0005]
As can be seen from FIGS. 8A, 8B, and 8C, there is always a relation of r> n between the amount r of the presser P pushing the saw blade q and the amount of claws n. As a factor of this phenomenon,
(1) The saw blade q is inclined so as to rotate while the punch P moves linearly.
[0006]
(2) Spring back m is generated.
[0007]
(3) Tooth tip deformation (k ₁ -k ₂ ) occurs.
[0008]
Etc.
[0009]
Among these, the above (1) is a constant amount even if the tooth tip shape is different, but (2) and (3) are the tooth tip shape (especially from the bending position jj line of the set tooth to the tooth tip). If the shape is different, the spring back m and the amount of deformation (k ₁ −k ₂ ) will differ, and the bending length on the bending position jj will have a great effect.
[0010]
Accordingly, in the conventional band-saw blade BS having a variable pitch, the shape of the tooth tips of the set teeth b to e in the tooth group is not constant, and in particular, the bending lengths L _{1 to} L ₄ on the bending position jj are not constant. The difference between the values (2) and (3) described above is generated, and in order to make the set-up amount n of each tooth b to e constant, each tooth b to e alone is used to produce a pressure tool P. There is a problem in that the amount of protrusion must be adjusted.
[0011]
Even if each set tooth b to e is adjusted so as to have the same set amount n, the amount of deformation of the addendum differs depending on the addendum shape. There was a problem of having an adverse effect.
[0012]
The object of the present invention is to easily adjust the amount of protrusion in each set of teeth and to adjust the number of teeth simultaneously, to make the tooth tips of each tooth come and go uniformly, and to make the set-up teeth of the set teeth more precise. An object of the present invention is to provide a band saw blade designed to improve the life of the blade and improve the roughness of the cut surface.
[0013]
In addition, user needs in the market demand a band saw blade with higher accuracy than before, and a band saw blade with polished tooth tips has also appeared.
[0014]
In the future, in order to manufacture even more highly accurate band saw blades, it is essential to increase the accuracy and stability of the settling operation, and the tooth profile design and manufacturing method of the band saw blade taking into account the plastic deformation during the settling operation. Establishing is an urgent need.
[0015]
[Means for Solving the Problems]
The present invention has been made in view of the conventional problems as described above, and the invention according to claim 1 is directed to a variable pitch band saw blade having a plurality of set teeth, and bending of the set teeth at the time of set bending is performed. In order to equalize the resistance, the spring back amount of each set of teeth, and the amount of deformation of each set of teeth, the bending lengths of the set bending positions of the set teeth are the same .
[0016]
By making the bending lengths of the bending positions of the set teeth substantially the same, the bending resistance when performing the settling operation can be made substantially equal, and the springback amount of the set teeth can be made almost equal. In addition, a plurality of set teeth can be adjusted and struck simultaneously along the set bending position, and the amount of swing can be easily adjusted.
[0017]
The invention according to claim 2 is a variable pitch band saw blade having a plurality of set teeth, the bending resistance of each set of teeth having the same set of left and right set out amounts, and the amount of set out of the set of left and right sets. equal to clams drawer amount of spring-back amount and the left and right of each set teeth is equal equal amount of deformation of each set teeth, bending length of clams bending position of each set teeth equal clams drawer of the left and right in the same length Therefore, even in a configuration including a plurality of set teeth having different right and left set amounts, the set teeth having the same set amount of left and right sets are set to be set to the left and right accurately.
[0018]
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 to the tooth tip of each set of teeth is substantially the same. .
[0019]
By making the shape from the set bending position line of the set teeth to the addendum substantially the same shape, the deformation amount of the addendum becomes substantially the same for each set teeth and the entering and exiting of the set teeth is made uniform. Therefore, coupled with the fact that the springback amount of each set of teeth is substantially equal, it is possible to carry out a more precise set-up of the set teeth, thereby improving the life of the band saw blade and improving the roughness of the cut surface.
[0020]
The invention according to claim 4 is characterized in that, in the invention according to claim 1, 2, or 3, the set bending position of each set tooth is positioned on a straight line.
[0021]
Accordingly, when the set teeth are bent, it is easy to bend with respect to the clamp position by the clamp vise for clamping the band saw blade.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0023]
Referring to FIGS. 1A and 1B, 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 is shown. Here, of the seven teeth 1, 3, 5, 7, 9, 11, 13, the tooth 1 is a straight tooth, the teeth 3, 7, 11 are a left set tooth, and the teeth 5, 9, 13 are a right set. Showing teeth. In addition, the squeeze angle and clearance angle of each tooth 1 to 13 are all constant, and the root R is set to be constant for all teeth and the galette depth D is also constant.
[0024]
In this band saw blade BS, the bending resistance of each set of teeth during the set bending process is approximately equal, and the spring back amount of each set of teeth after set up is approximately equal, and the amount of deformation of each set of teeth after set up bending. Are manufactured so as to be substantially equal.
[0025]
That is, as shown in FIG. 1 (B), the jj line indicates the set bending position, and the bending lengths L of the set teeth 3 to 13 are all constant. Further, the shape from the set bending position jj line to the tip S of the set teeth 3 to 13 is made constant for all teeth. The set bending position may be closer to the tooth tip S than the jj line, or closer to the tooth bottom.
[0026]
Therefore, by making the bending lengths L of the set bending positions j-j of the set teeth 3 to 13 substantially the same, the bending resistance of the set teeth at the time of the settling operation is approximately equal, and after the set bend The amount of springback is also almost equal. Further, the plurality of set teeth 3 to 13 can be simultaneously pressed along the set bending position j-j line, and the amount of swing can be easily adjusted.
[0027]
In practice, each tooth is measured for the bending length L within one group of the tooth mold, and when the average value is L _A , it is desirable that the variation in each tooth is within L _A ± 10%.
[0028]
Further, by making the shape from the set bending position jj line of the set teeth 3 to 13 to the cutting edge S substantially the same, the deformation amount of the addendum S after the set bend is the same for each set teeth 3 to 13. It becomes substantially the same, and the entering and exiting of the set teeth 3 to 13 can be made uniform. Therefore, the spring back amount and deformation amount of each set of teeth are almost equal, and more uniform and highly accurate set-up of the set teeth can be performed, and the wear of each tooth on the band saw blade BS can be made uniform and the service life can be improved. Up and improvement of the cut surface roughness can be achieved.
[0029]
2 (A) and 2 (B) show an example of the second embodiment, and a variable pitch in which seven teeth arranged at _seven different pitches P _{1 to} P 7 are formed as one group. A band saw blade BS is shown. Of these seven teeth 1, 3, 5, 7, 9, 11, and 13, tooth 1 is a straight tooth, teeth 3, 7, and 11 are left set teeth, and 5, 9, and 13 are right set teeth. ing. Moreover, the squeeze angles and clearance angles of the teeth 1 to 13 are all constant, and the bending lengths L of the teeth 3 to 13 on the set bending position jj are all constant. Further, the roots R _{1 to} R ₇ have different curvatures, and the contact of the root R is more than the intersection X ₁ between the squeeze surface T and the jj line and the intersection X ₂ between the flank U and the jj line. It is set not to be on the tooth tip S side. Accordingly, the tooth tip side shape from the jj line to the tooth tip S is all constant. Note that the set bending position may be closer to the tooth tip S than the jj line.
[0030]
In practice, each tooth is measured for the bending length L within one group of the tooth mold, and when the average value is L _A , it is desirable that the variation in each tooth is within L _A ± 10%.
[0031]
Therefore, also in the example of the embodiment shown in FIGS. 2A and 2B, the same operation and effect as the saw blade exemplified in FIGS. 1A and 1B described above are exhibited. .
[0032]
FIGS. 3A and 3B show an example of the third embodiment, and a variable pitch in which seven teeth arranged at _seven different pitches P _{1 to} P 7 are formed as one group. A band saw blade BS is shown. Of these seven teeth 1, 3, 5, 7, 9, 11, 13, tooth 1 is a straight tooth, teeth 3, 7, 11 are left set teeth, and teeth 5, 9, 13 are right set teeth. Show. The tooth tip side shapes of the set teeth 3, 5 are equal, and the tooth tip side shapes of the set teeth 7, 9, 11, 13 are formed equally. The clearance angles α ₆ , α ₅ of the tip of the left and right set teeth 3, 5 following the straight tooth 1 are the clearance angles α ₄ , α ₃ , α of the other left and right set teeth 7, 9, 11, 13. _2, is set smaller than the alpha _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 The point X ₁ is taken at the position of the line segment of the same bending length L as the teeth 7, 9, 11, 13, and a second clearance angle c is provided from the point X ₁ as shown in FIG. By adopting the same method, it is possible to easily set the set bending length L of all the set teeth 3 to 13 to substantially the same length.
[0033]
In practice, each tooth is measured for the bending length L within one group of the tooth mold, and when the average value is L _A , it is desirable that the variation in each tooth is within L _A ± 10%.
[0034]
Therefore, in the band saw blade BS shown in FIGS. 3 (A) and 3 (B), the second clearance angle C is provided on the teeth 3 and 5 to reach the tooth tip of each tooth from the set bending position jj line. Even when the shapes are different, the bending length L of each tooth is substantially equal, and the amount of spring back after clam bending is substantially equal, and the operation and effect are almost the same as those of the band saw blade BS shown in FIG. It plays.
[0035]
FIG. 4 (A), the variable pitch configured as a fourth example of the embodiment are the illustrated, seven seven teeth one group arranged at a pitch P ₁ to P ₇ of the (B) A band saw blade BS is shown. Of these seven teeth 1, 3, 5, 7, 9, 11, 13, tooth 1 is a straight tooth, teeth 3, 7, 11 are left set teeth, and teeth 5, 9, 13 are right set teeth. Show. The tooth tip side shapes of the teeth 3 and 5 are equal, and the tooth tip side shapes of the teeth 7, 9, 11 and 13 are formed equally. The squeeze angles θ ₆ , θ ₅ of the subsequent left and right set teeth 3, 5 of the straight tooth 1 are smaller than the squeeze angles θ ₄ , θ ₃ , θ ₂ , θ _{1 of the} other left and right set teeth 7, 9, 11, 13. It is set.
[0036]
Moreover, clams bending the position j-j line is not in contact with the tooth bottom R of which set teeth 3 to 13, set teeth on j-j line from the intersection X ₂ between rake face line and the j-j line of the teeth 3 The point X ₁ is taken at the position of the line segment of the same bending length L as 7, 9, 11 and the second clearance angle c is provided from the point X ₁ as shown in FIG. By doing so, it is possible to easily set the set bending length L of all the set teeth 3 to 13 to substantially the same length.
[0037]
In practice, each tooth is measured for the bending length L within one group of the tooth mold, and when the average value is L _A , it is desirable that the variation in each tooth is within L _A ± 10%.
[0038]
Therefore, in the band saw blade BS shown in FIGS. 4 (A) and 4 (B), the second clearance angle C is provided on the teeth 3 and 5 to reach the tooth tip of each tooth from the set bending position jj line. Even if the shapes are different, the bending length L of each tooth can be made substantially equal, and the amount of spring back after the set-up bending becomes almost equal, and there are almost the same operations and effects as the band saw blade BS shown in FIG. Is.
[0039]
FIGS. 5A and 5B show an example of the fifth embodiment, and a variable pitch in which five teeth arranged at _five different pitches P _{1 to} P 5 are formed as one group. A band saw blade BS is shown. Of these five teeth 15, 17, 19, 21, 23, the tooth 15 is a straight tooth, the teeth 17, 21 are right set teeth, and the teeth 19, 23 are left set teeth.
[0040]
The straight teeth 15, right set teeth 17, 21 and left set teeth 19, 23 all have the same clearance angle and squeeze angle, but the curvatures of the roots R _{1 to} R ₅ are different in all teeth. . And since clams bending position j-j line is in contact with the tooth bottom R of the rake face T side, the position of the line segment length L of the intersection point X ₂ on j-j line of the flank line and the j-j line take two points X _1, by a tooth bottom R as passing through the point X ₁ together with contact with the rake face T line and flank U lines, all clams bending length L of the set teeth 17 to 23 about the same Can be set to length.
[0041]
In practice, each tooth is measured for the bending length L within one group of the tooth mold, and when the average value is L _A , it is desirable that the variation in each tooth is within L _A ± 10%.
[0042]
Therefore, the band saw blade BS shown in FIGS. 5 (A) and 5 (B) also has substantially the same operations and effects as the band saw blade BS shown in FIG.
[0043]
FIGS. 6 (A) and 6 (B) show an example of the sixth embodiment. A band-saw blade having a variable pitch in which eight teeth arranged at eight pitches P1 to P8 are formed as one group. BS is shown. In this band saw blade BS, the teeth 25, 33 are straight teeth, the teeth 27, 31, 37 are left set teeth, and the teeth 29, 35, 39 are right set teeth.
[0044]
The left set teeth 27 and the right set teeth 39 have a small set-out amount and are formed to have the same shape on the tooth tip side from the set bending position j-j, and the bending length L1 at the set bending position is equal. It is provided. The settling amount of the left and right set teeth 29, 31, 35, 37 is larger than the set amount of the set teeth 27, 39, and the set bending position j-j line of each set teeth 29, 31, 35, 37. The shapes on the tooth tip side are the same, and the bending length L2 at the set bending position is the same.
[0045]
In other words, in this embodiment, the tooth tip side shape and the set bending length of each set of teeth that have the same amount of left and right set out are provided. Therefore, even in a configuration including a plurality of set teeth with different left and right set projection amounts, the left and right set teeth having the same set amount in the left and right directions have the same tooth tip side shape and set bend length. It is equivalent to the right and left direction and is accurately set out.
[0046]
Incidentally, substantially to each tooth measuring the length L bending tooth having the same clam drawer amount in a group of teeth type, when the average value and the L _A, the variation of each tooth L _A ± 10% It is desirable to be within.
[0047]
In addition, in the band saw blade BS shown in FIGS. 6 (A) and 6 (B), the tooth tip side shapes of all the teeth may be made equal and the bend lengths of the claws may be made equal. It is also possible to make the tooth clashes out equal.
[0048]
1 to 6, the arrow v direction indicates the traveling direction of the band saw blade BS, and the arrow w direction indicates the cutting direction with respect to a workpiece not shown.
[0049]
1 to 6 show an example of a band-saw blade having a variable pitch in which one group is composed of five teeth or seven teeth and eight teeth, the number of teeth in one group. The clam pattern can be arbitrarily set as appropriate.
[0050]
In addition, this invention is not limited to the example of embodiment mentioned above, It can implement in another aspect by making an appropriate change. For example, the arrangement of the clad bending positions in each set of teeth may not be on a straight line but may be arranged in a step difference.
[0051]
【The invention's effect】
As can be understood from the embodiments as described above, according to the invention according to the first aspect, the settling operation is performed by setting the bending lengths at the set bending positions of the set teeth to substantially the same length. The bending resistance at that time is almost equal, and the springback amount of each set tooth after the set teeth are bent can be made almost equal. Further, a plurality of set teeth can be simultaneously pressed along the set bending position, and the amount of swing can be easily adjusted.
[0052]
The invention according to claim 2 is a variable pitch band saw blade having a plurality of set teeth, and the bending lengths of the set teeth bending positions of the set teeth are substantially the same. Therefore, even in a configuration including a plurality of set teeth having different right and left set amounts, the set teeth having the same set amounts of left and right sets are set to be set accurately to the left and right.
[0053]
According to the invention of claim 3, by making the shape from the set bending position line of each set of teeth to the addendum substantially the same, the amount of deformation of the addendum is substantially the same for each set of teeth. , It is possible to make the access and exit of each set tooth uniform. Therefore, coupled with the fact that the springback amount of each set of teeth is almost equal, it is possible to produce a more uniform and highly accurate set-up of the set teeth. The surface roughness can be improved.
[0054]
The invention according to claim 4 is the invention according to claim 1, 2 or 3, wherein the set-up bending position of each set-up tooth is positioned on a straight line, so that the set-up bending of each set-up tooth is performed. It is easy to bend the claws with reference to the clamp position by the clamp vise which clamps the band saw blade.
[0055]
As described above, in any of the claims, it is possible to easily carry out a high-precision clasping process, and it is possible to improve the cut surface roughness and increase the service life in response to market user needs.
[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 views of an example of a second embodiment of the band saw blade according to the present invention. FIGS.
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.
FIGS. 4A and 4B are explanatory views of an example of a fourth embodiment of a band saw blade according to the present invention. FIGS.
FIGS. 5A and 5B are explanatory views of an example of a fifth embodiment of a band saw blade according to the present invention. FIGS.
FIGS. 6A and 6B are explanatory views of an example of a sixth embodiment of a band saw blade according to the present invention. FIGS.
FIGS. 7A and 7B are explanatory diagrams showing a configuration of a conventional band saw blade and a clam crusher. FIG.
FIGS. 8A, 8B, and 8C are explanatory diagrams for performing clasping out processing in 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 teeth 5, 9, 13, 17, 21, 29, 35, 39, a , B Right set tooth BS Band saw blade jj line Set bend position R, R _{1 to} R ₇ Curvature L, L ₁ , L ₂ , L ₃ , L ₄ Set bend length S Tooth tip P _{1 to} P ₈ pitch V Traveling direction W Cutting direction D Garrett depth f, g, h, i, p Crushing indenter q Saw tooth n Claw swinging amount B Clamp vice r Amount of pressing blade P pushing the saw blade q m Springback amount K ₁ Tooth thickness α _{1 to} α ₆ clearance angle C after belt thickness K _{2 set} 2nd clearance angles X ₁ and X ₂ points

Claims (4)

A variable-pitch band saw blade having a plurality of set teeth, in order to equalize the bending resistance, the spring back amount of each set tooth, and the deformation amount of each set tooth. A band saw blade characterized by having the same bending length at the tooth bending position. A band saw blade of variable pitch with a plurality of set teeth, the right and left set drawer amount equal clam bending when bending resistance of each set teeth, spring back amount and the left and right of each set tooth clam shaken amount of the left and right are equal in order to clams drawer amount is equal to the amount of deformation of the same respective set teeth, band saw blade bending length of clams bending position of each set teeth equal clams drawer of right and left is equal to or the same length. The band saw blade according to claim 1 or 2, wherein the shape of each set tooth from the set bending position line to the tooth tip is the same .   The band saw blade according to claim 1, 2, or 3, wherein the set bending position of each set tooth is located on a straight line.

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