JPH0741467B2 - Saw blade - Google Patents

Description

The present invention relates to saw blades, and more particularly to saw blades such as band saws, circular saws or hawsaws.

[Prior Art] Conventionally, a band saw machine has been used as an apparatus for cutting (cutting) a large workpiece made of metal, for example. In the band saw blade used in the band saw machine, for example, in order to cope with chatter vibration and noise, the pattern of the clams is a laker set, a wave set, a straight set, etc.
Various patterns are set, and the pitch of each tooth is made unequal. Further, band saw blades having different tooth heights have been developed to cope with difficult-to-cut materials such as stainless steel.

However, in the conventional band saw blade, after forming the tooth height of each tooth to be the same, a pair of left and right set teeth that are bent in the thickness direction (horizontal direction) of the band saw blade and straight teeth that are not bent left and right In general, various clam patterns are set according to the combination.

[Problems to be Solved by the Invention] Therefore, although there is a slight difference in height between the tooth tips of the straight teeth and the tooth tips of the left and right crest teeth, for example, it can be seen on the trace track of the thickness center of the straight tooth. And the tip of each tooth is almost at the same height. Therefore, when cutting a work piece, the straight teeth may not always cut into the work piece first, but the left and right set teeth may cut into the work piece first, for example, the left set tooth may cut into the work piece first. When cut into, the band saw blade tends to swing to the right due to cutting resistance.

That is, in the conventional band saw blade, there is a problem that vibration or bending is easily generated in the left and right directions.

In addition, as a measure for difficult-to-cut materials, in a band saw blade with different tooth heights, only teeth with large tooth height perform the cutting action of the workpiece, and teeth with small tooth height are mostly cut. It usually does not work. In particular, the inner corner of the tip of the tooth, that is, the left corner for the right teeth and the right corner for the left teeth, are completely hidden by the teeth with large tooth height when viewed from the cutting direction, There is a problem that the cutting action cannot be performed.

Also, with saw blades having different tooth height dimensions, it is common to arrange right and left bevel teeth with a small tooth height dimension consecutively. A tooth with a large tooth height (in the cutting direction) is subjected to a particularly large load. At the same time, the saw blade, which was cutting the workpiece in a bowed shape, returns to a straight state at the moment when the cutting of the workpiece is finished, and a small protrusion with a broken shape that remains slightly on the workpiece without being cut. There is a problem in (burrs) that a tooth having a small tooth height which is close to an unloaded state is impacted and is likely to be chipped.

Further, it is difficult to cut difficult-to-cut materials or easy-to-cut materials or large-diameter materials to small-diameter materials with the same saw blade, and the present situation is to select a saw blade suitable for each application.

The present invention was created in view of the conventional problems as described above, and a first object of the present invention is that all teeth perform cutting of a work piece, and tooth heights located next to teeth having a small tooth height dimension. (EN) Provided is a saw blade in which the load on a tooth having a large size is reduced to make the load on each tooth more even, to achieve uniform wear, and to prevent cutting and bending.

A second object of the present invention is to provide a saw blade that is less likely to cause tooth breakage when a workpiece whose cutting length is short is cut just before the end of initial cutting at the time of cutting a round bar.

A third object of the present invention is to provide a saw blade capable of subdividing the chips generated by cutting the saw blade and improving the dischargeability of the chips.

A fourth object of the present invention is to provide a saw blade capable of cutting from difficult-to-cut materials to easily cut materials with the same saw blade.

A fifth object of the present invention is to provide a saw blade capable of cutting from a large diameter material to a small diameter material with the same saw blade.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention provides a leading tooth for cutting a workpiece in advance in the cutting direction when cutting the workpiece, and a leading tooth. A plurality of trailing teeth that cut into the workpiece after a delay and cut to widen the width of the leading cutting groove formed by the leading teeth.
It is provided as a group, and the plurality of posterior teeth are composed of a plurality of pairs of left crest teeth bent to the left and right crest teeth bent to the right, and the teeth from the reference position to the tip of the preceding tooth. The tooth height dimension from the reference position to the tip of each pair of trailing teeth is set to be the same or smaller than the height dimension, and the tooth height dimension is larger than the crest width of the pair of teeth with large trailing tooth height dimension. The pair of teeth having a small tooth width is provided with a large crest width, and the succeeding teeth having the smallest tooth height dimension are arranged so as not to be continuous.

In addition, when cutting the workpiece, the leading tooth that cuts the workpiece ahead of the cutting direction and the workpiece that cuts behind the preceding tooth, and the width of the preceding cutting groove formed by the leading tooth is expanded. A plurality of trailing teeth that are cut to open are provided as a group, and the plurality of trailing teeth are composed of a plurality of pairs of left crest teeth bent to the left and right crest teeth bent to the right. , The tooth height dimension from the reference position to each tooth tip of each pair of trailing teeth is set smaller than the tooth height dimension from the reference position to the tooth tip portion of the preceding tooth, and the tooth height dimension of the trailing tooth is large. The tooth crawling width is smaller than the tooth crawling width of the pair of teeth, and the crawling width of the pair of teeth is larger, and the trailing tooth has the smallest crawling amount than the height from the reference position to the bending position. Is the largest and A height dimension largely provided configuration of a small tooth reference position of the height dimension to the bending position.

[Examples] Hereinafter, one example of the present invention will be described in detail with reference to the drawings. Although the example illustrates a case of a band saw blade,
The present invention is not limited to band saw blades, and can be applied to various saw blades such as a circular saw blade or a haku sauce.

First, referring to FIG. 1 (a) to FIG. 1 (c), the saw blade 1 basically performs the cutting of the workpiece W.
Leading teeth 3 for cutting the workpiece W prior to the cutting direction (the arrow A direction in the drawing) with respect to the workpiece W.
And a first trailing tooth, which is the first trailing tooth for performing the first-stage groove expanding cutting, a right tooth 7R, a left tooth 9L, and a second trailing tooth, which is the second trailing tooth for performing the second-step groove expanding cutting, 5L, Equipped with the right set teeth 11R as one basic A group (set).

When the center of the width of the saw blade 1 is the reference position F, for example, the preceding tooth 3 has a tooth height dimension from the reference position F to the tip 3P.
3H is formed to be larger than the tooth height dimension 5H, 11H from the reference position F on the second succeeding tooth 5L, 11R to each tooth tip portion 5P, 11P. Also, from the reference position F of the first succeeding tooth 7R, 9L to each tooth tip
The tooth heights 7H and 9H up to 7P and 9P are formed at the same height as the leading tooth 3. The tooth heights 7H and 9H may be lower than the tooth height 3H of the preceding tooth 3.

That is, the leading tooth 3 and the first trailing teeth 7R, 9L and the second trailing teeth 5L, 11R have steps formed in the cutting direction with respect to the workpiece W, as is apparent from FIG.

Further, as is clear from FIG. 1 (b), the leading tooth 3 is
When viewed facing the cutting direction of the workpiece W (the direction of arrow B in the drawing), it is formed with straight teeth that do not bend in the thickness direction of the saw blade 1 (hereinafter referred to as the left-right direction).
The trailing teeth 7R and 9L are formed in the right and left crest teeth which are slightly bent in the left-right direction and are clawed out. The second succeeding teeth 5L and 11R are formed into left and right crest teeth which are largely bent in the left-right direction to be cleaved.

When the workpiece W is cut (cut) by the saw blade 1 having the above-described configuration, the leading tooth 3 having the largest tooth height dimension 3H is first cut into the workpiece W, and then the tooth height dimension 7H,
9H is the next largest first trailing tooth 7R, 9L, followed by the second
The trailing teeth 5L and 11R are cut into the workpiece W.
That is, the workpiece W is cut from a tooth having a large tooth height.

Since the preceding tooth 3 is a straight tooth that has not been left and right protruded, when the preceding tooth 3 cuts into the workpiece W,
The workpiece W is cut straight ahead without receiving a component force in the left-right direction. Next, when the first succeeding teeth 7R and 9L are cut into the workpiece W, the first succeeding teeth 7R and 9L are the right and left crest teeth, respectively, and thus are cut by the tip portion 3P of the preceding tooth 3. Always guided straight ahead by the preceding cutting groove,
Vibration in the left-right direction due to the first succeeding teeth 7R and 9L is suppressed. Similarly to the first succeeding tooth, the second succeeding teeth 5L and 11R are also suppressed from vibrating in the left-right direction.

Further, since the second succeeding teeth 5L and 11R are provided with the smallest tooth height dimension and are arranged so as not to be continuous with each other, as apparent from FIG. 1A, the second succeeding teeth 5L,
The load on the first succeeding tooth 7R and the leading tooth 3 which are teeth having a large tooth height dimension following the 11R is reduced.

In the above embodiment, the case where the leading tooth 3 is a straight tooth has been described. However, as shown in, for example, FIGS. 2 (a) to 2 (c), the tooth is changed to a straight tooth and is extremely slight in the left-right direction. The left and right bent teeth 3L and 3R that are bent in a pair may be used as a pair, and the other configurations may be similar to those of the embodiment shown in FIGS. 1 (a) to 1 (c).

Also in the configuration of this embodiment, the same operation and effect as those of the above embodiment can be obtained.

Furthermore, in the case where the teeth 3 5, 5L, 7R, 9L and 11R of the saw blade 1 are fixed to the tips 3C, 5C, 7C, 9C, 11C having a dovetail cross-sectional shape to form a repellent clam, Each chip as shown in the figure
3C, 5C, 7C, 9C, 11C with different tooth height dimensions, and by configuring the width dimension of the tooth tip portion to be larger for a tip with a smaller tooth height dimension, the same action and effect as the above-mentioned embodiment Can be played.

The above description of the embodiment is based on one straight tooth as the leading tooth 3 or a pair of bevel teeth bent slightly to the left and right and four left and right bevel teeth as the trailing teeth 5L, 7R, 9L, 11R. The case where the different teeth are set as one group has been described. However, the number of each tooth in one group is arbitrary, and for example, various numbers in one group can be selected as 4,5,6,7,8,9 ,. The difference in size and the difference in clam width can be appropriately configured.

FIGS. 4 (a) to 4 (c) show a saw blade 1 in which six teeth are grouped into one group, and both corners of the leading tooth 3 of the saw blade 1 are ground to have the same inclination to both sides. Forming the inclined portion 3B of
This illustrates a case where the tooth tips of the leading teeth 3 are formed in a substantially V shape.

In this embodiment, as one B group (set), the second leading tooth 3S having the same dimension as the tooth height dimension 3H of the leading tooth 3 is provided, and two pairs of trailing teeth 7R, 9L and 5L, 11R
Is provided. The second leading tooth 3S may have a tooth height dimension slightly smaller than the tooth height dimension of the leading tooth 3.
By forming the inclined portion 3B of the tooth tip portion, the remaining portion which is not cut is cut.

That is, according to this embodiment, the leading tooth 3 and the second leading tooth 3S are linearly guided by the leading cutting groove, and the same action and effect as those of the above-described embodiment are obtained, and the chips are generated. It is subdivided to improve the chip discharge performance.

Although it is desirable to provide the second leading tooth 3S in order to subdivide the chips, it is not always necessary to provide the second leading tooth 3S. For example, as shown in FIG. It is also possible to omit.

Further, as a configuration for subdividing the chips, for example, as shown in FIG. 4 (e), an appropriate number of U-shaped or V-shaped notched portions 3N are formed at the tip of the leading tooth 3. It is also possible to In this case, the second leading tooth 3S cuts the remaining V-shaped portion that is not cut due to the formation of the notch 3N.

Next, referring to FIG. 5 (a) to FIG. 5 (c) shown as reference examples, when the saw blade 1 cuts the workpiece W at the reference position, the saw blade 1 has a cutting direction (shown in the drawing) with respect to the workpiece W. The leading tooth 3 for cutting the workpiece W, the first trailing teeth 9L, 7R for performing the first-step leading groove expanding cutting, and the second-stage leading groove expanding cutting. 13 as a cushioning tooth for the third succeeding tooth provided for the purpose of reducing the load on the second succeeding tooth 5L, 11R or the preceding tooth (straight tooth) 3
It is equipped with L and 15R as one C group (set).

For example, when the center of the width of the saw blade 1 is the reference position F, the third trailing teeth 13L and 15R are from the reference position F to the tooth tips 13P and 15P.
Tooth height dimensions 13H and 15H up to the tooth height dimensions 5H and 11H from the reference position F on the second succeeding teeth 5L and 11R to the tooth tips 5P and 11P,
The second succeeding tooth 11 is formed at a height intermediate between the tooth height dimension 3H from the reference position F of the leading tooth (straight tooth) 3 to the tooth tip portion 3P.
It is provided between R and the leading tooth (straight tooth) 3.

The amount of clams of the cushion teeth 13L, 15R is the second trailing teeth 5L, 11
It can be set arbitrarily, assuming that it is smaller than R. It is also possible to use straight teeth that do not bend in the left-right direction.

That is, when the cutting order is taken from the tooth having a small tooth height to the tooth having a large tooth height, the saw blade has an intermediate tooth height between the tooth having the small tooth height and the tooth having the large tooth height. The cushioning teeth are provided to soften the impact of the next tooth.

Then, FIG. 6 shows entry / exit of the addendum corner depending on the bending position of the clam. The saw blade shown in this figure is a leading tooth (straight tooth) for cutting the workpiece ahead of the cutting direction when the workpiece is cut, and cuts the workpiece behind the leading tooth. , 9L, 7R as one group as a plurality of trailing teeth that are cut to widen the width of the leading cutting groove by the leading tooth, and the trailing tooth is larger than the tooth height dimension from the reference position to the tip of the leading tooth. An example in which the tooth height dimension is set to be small is shown as an example.

Here, the one-dot chain line shows the case in which bending-off is carried out at the bending position m, and the one shown by the broken line is the following tooth when bending-out is carried out at the bending position n. In addition, the amount of each tooth is the same, and the tooth shown by the one-dot chain line and the tooth shown by the broken line are formed at the same height before the tooth is drawn out.

As is clear from FIG. 6, it is more likely that the front tooth is splayed at the bending position n (the height dimension from the reference position to the bending position is large) which is a position close to the tip of the leading tooth 3. 3 In the bending position m which is far from the tooth tip (the higher dimension from the reference position to the bending position is smaller), the clam is splayed out, and The inner corner portion of a certain tooth tip is largely raised, and the tooth height dimension d is increased.

In other words, when the cutting amount of the leading tooth 3 becomes large, the one in which the cutting is performed at the bending position n is
The inner corner portion of the tooth tip becomes easier to work than that in the bending position m in which the shavings are drawn out, and the tooth itself has a cushioning effect for the load generated on the leading tooth 3.

In this example, it is shown that there are no other teeth, but if there are other teeth there is a large amount of trailing teeth in the trailing teeth, and the bending position of the teeth of the tooth with the smallest tooth height dimension. Bending may be performed at a position closer to the tip of the tooth than the tooth with a small amount of clams.

[Effects of the Invention] As can be understood from the above description of the embodiments, the gist of the present invention is as set forth in the claims.

As is clear from the description, the first aspect of the present invention includes a leading tooth that precedes the cutting direction when cutting a workpiece,
A plurality of trailing teeth, which are cut into the workpiece later than the leading teeth and are cut to widen the width of the leading cutting groove formed by the leading teeth, are provided as a group, and the plurality of trailing teeth are arranged in the leftward direction. It is composed of a plurality of pairs of a left beveled tooth bent to the right and a right beveled tooth bent to the right.

That is, since the trailing tooth has a function of widening the width of the leading cutting groove by the leading tooth and includes the pair of left and right teeth, the component forces in the left and right directions at the time of cutting cancel each other out. It suppresses the vibration in the left-right direction.

In addition, the tooth height dimension from the reference position to the tip of the trailing tooth is smaller than the tooth dimension of the leading tooth, and the crest width of the pair of trailing teeth is larger than the crest width of the pair of teeth with a small tooth height dimension. It is provided. Further, since the pair of trailing teeth having the smallest tooth height dimension is not arranged continuously, when each trailing tooth cuts to widen the groove, the trailing tooth that cuts the groove to the widest one has the smallest tooth height dimension. The amount of deformation that elastically deforms due to the component force in the left-right direction acting on the tooth tip during cutting can be suppressed, and even a saw blade that is bent in the left-right direction and cut out can be cut into a wide groove. Is.

Not only is the cutting powder subdivided, but the subsequent tooth of the minimum tooth height dimension is not continuous, so that the load of the next tooth to be cut following the subsequent tooth of the minimum tooth height dimension is
Compared with the configuration in which the succeeding teeth having the minimum tooth height dimension are continuous, the number of teeth is reduced by half, and wear and the like are reduced.

As is clear from the description of the claims, the second invention has the same structure as the first invention and has the same effect as that of the first invention, and also has the same effect. The bending position of the right and left of the small tooth with a small height is located on the tip side of the tooth with a large tooth height.Therefore, the bending angle of the small tooth with a small tooth height is large. In this aspect, the inner corner portion of the succeeding tooth having a small tooth height dimension projects more in the cutting direction than the outer corner portion. Therefore, the inner corner also contributes to the cutting, and the load on the leading tooth having the next largest tooth height can be reduced by that much, and wear and the like can be suppressed.

[Brief description of drawings]

1 (a) is a front view of the saw blade, FIG. 1 (b) is a sectional view taken along line bb in FIG. 1 (a), and FIG. 1 (c).
Is a bottom view. 2 (a), 2 (b) and 2 (c) are a front view, a side view and a bottom view, respectively, of the saw blade. FIG. 3 is a front view of the saw blade. 4 (a), 4 (b), and 4 (c),
Front view, cross-sectional view of bb line and bottom view of the saw blade,
FIG. 4 (d) and FIG. 4 (e) show another embodiment corresponding to FIG. 4 (b). FIG. 5 (a), FIG. 5 (b) and FIG. 5 (c) are a front view, a bb line sectional view and a bottom view of a saw blade as a reference example, respectively. FIG. 6 is a side view of the saw blade. (Explanation of the symbols indicating the main parts of the drawing) 1 …… Saw blade 3 …… Leading tooth 5L, 7R, 9L, 11R, 13L, 13R …… Successive tooth

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-58-137520 (JP, A) JP-A-52-26679 (JP, A) Actual development: JP-A-56-176126 (JP, U)

Claims (7)

[Claims] 1. A front tooth for cutting a work piece in advance in a cutting direction when cutting the work piece,
It is equipped with a plurality of trailing teeth that make a cut in the workpiece later than the leading teeth and that cut to widen the width of the leading cutting groove formed by the leading teeth, and the plurality of trailing teeth are to the left. It consists of multiple pairs of left and right bent teeth that bend to the right, and each pair from the reference position to the succeeding tooth is more than the tooth height dimension from the reference position to the tip of the leading tooth. Have the same tooth height up to the tooth tip of
The tooth width of the pair of teeth having a smaller tooth height is larger than that of the pair of teeth having a large tooth height of the trailing tooth, and the trailing tooth having the smallest tooth height is not continuous. A saw blade characterized by being arranged as follows. 2. A tooth from the reference position to the bending position of the tooth having the smallest crawling amount and the smallest tooth height size is smaller than the height dimension of the trailing tooth from the reference position to the bending position of the tooth having the small cutting amount. The saw blade according to claim 1, wherein the saw blade is provided with a large height dimension. 3. When taking a cutting sequence from a tooth having a small tooth height to a tooth having a large tooth height, a trailing tooth having an intermediate tooth height between a trailing tooth having a small tooth height and a leading tooth having a large tooth height. Compared to the height dimension from the reference position to the bending position of the tooth with the small trailing amount of trailing teeth, the tooth has the largest amount of crawling protrusion and the smallest tooth height dimension from the reference position to the bending position. The saw blade according to claim 1, wherein the saw blade is provided with a large height dimension. 4. The saw blade according to claim 1, wherein the leading tooth is a straight tooth that is not bent in the left-right direction. 5. The leading tooth is composed of a pair of a left claw tooth bent slightly to the left and a right claw tooth bent slightly to the right. The saw blade according to claim 1. 6. The saw blade according to claim 1, wherein the tip portion of the leading tooth is provided with a notch portion that divides the tip portion into a plurality of portions. 7. A leading tooth for cutting a work piece in advance in a cutting direction when cutting the work piece,
It is equipped with a plurality of trailing teeth that make a cut in the workpiece later than the leading teeth and that cuts to widen the width of the leading cutting groove formed by the leading teeth. It consists of multiple pairs of left and right claws bent to the right direction, and each pair from the reference position to the succeeding tooth is more than the height from the reference position to the tip of the preceding tooth. The tooth height to the tip of the tooth is small, and the claw width of the pair of teeth with a small tooth height is larger than the claw width of the pair of teeth with a large tooth height of the following tooth. The height dimension from the reference position to the bending position of the tooth with the smallest tooth height dimension is larger than the height dimension from the reference position to the bending position of the tooth with the smallest amount. And saw blade.