JPS62140714A - Saw teeth - Google Patents

Abstract

PURPOSE:To ensure even abrasion, to provide strength for tear bending and to prolong the life by arranging the spring set teeth with minimum tooth height so as not to lie continuously, reducing the load on the following tooth with greater tooth height, and thereby making the loads on the teeth uniform. CONSTITUTION:A precedent tooth 3 and the following teeth 5L-11R to cut wide the groove in preceding machining are grouped into one, and the following teeth 5L-11R are put in an appropriate number of left spring set teeth 5L, 9L and right spring set teeth 7R, 11R. From a certain reference position the tooth height of each pair of following teeth shall be equal to or smaller than the tooth height of the precedent tooth 3, and the spring set width of each pair of teeth with minor tooth height be greater than the spring set width of pair of teeth with major tooth height in the following teeth. Thus it is so arranged that spring set teeth with minimum tooth height to do not occur continued, and the loads on the following teeth with greater height are reduced. Uniform loads on the teeth should result in even abrasion, strength for tear bending and prolonged life.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field 1 of the Invention The present invention relates to a saw blade, and more particularly to a saw blade such as a band saw, a circular saw, or a hacksaw.

[Technical Back Pressure of the Invention and its Problems] Conventionally, band saws have been used as a neck for cutting large workpieces made of metal, for example. The A3 band saw blade used in the Wt saw machine has various cutting patterns such as raker pit, wave set, or straight set in order to deal with chatter vibration and noise, and The pitch of each tooth is set to an unequal pitch. Furthermore, in order to cope with difficult-to-cut materials such as stainless steel, band saw blades have been developed in which the tooth heights of each tooth are different.

However, in conventional band saw blades, after each tooth is formed to have the same tooth height dimension, left and right set teeth bent in the thickness direction (left and right direction) of the band saw blade are assembled with straight teeth that are not bent left and right. It is common to set various clam patterns by combining them. Therefore, although there is some height difference between the tip of the straight tooth and the tips of the left and right set teeth, for example, if you look at the trajectory of the center of the thickness of the straight tooth, the tip of each tooth is almost are at the same height. Therefore, when cutting a workpiece, the straight teeth do not always cut into the workpiece first, but the left and right set teeth may cut into the workpiece first, for example, the left set tooth cuts into the workpiece first. When cutting, the band saw blade tends to swing to the right due to cutting resistance. That is, conventional band saw blades have a problem in that they tend to vibrate in the left-right direction and bend.

In addition, in band saw blades that have different tooth height dimensions for each tooth to deal with difficult-to-cut materials, only the tooth with a large tooth height performs the cutting action on the workpiece, and the tooth with a small tooth height/dimension Normally, there is almost no cutting action. In particular, the inner corner part 1 of the tip of the tooth, the left corner if it is a right set tooth, and the right corner if it is a left set south part, is completely hidden by the tooth with a large tooth height when viewed from the cutting direction. Therefore, there is a problem in that no cutting action can be performed at all.

In addition, in saw blades with different tooth heights, the right set tooth and left set tooth with small tooth height are usually arranged consecutively, so the left and right set teeth with small tooth height are placed next to each other. Teeth located with a large tooth height (in the cutting direction) are subjected to particularly high loads. At the same time, the saw blade that was cutting the workpiece in an arched state returns to a straight state at the moment the workpiece finishes cutting, resulting in a small broken protrusion remaining on the workpiece without being cut. (Bali) ni, teru n
There are problems such as the small teeth of the tooth height method, which are close to the loaded state, are likely to come into contact with each other with impact and cause tooth chipping.

Furthermore, it is difficult to use the same saw blade to cut from difficult-to-cut materials to easy-to-cut materials, or from large-diameter materials to small-diameter materials, and the current situation is to select a saw blade that suits each application.

[Purpose of Defense] The present invention was created in view of the above-mentioned conventional problems, and its first purpose is to ensure that all the teeth cut the workpiece, and that the teeth next to the teeth with the smaller tooth height dimension cut the workpiece. To provide a saw blade that reduces the load on teeth with a large tooth height located at the top of the blade, thereby making the load on each tooth more even, achieving uniform wear, and combing less easily.

A second object of the present invention is to provide a saw blade that is less prone to tooth loss when cutting, for example, a workpiece whose cutting length becomes short just before the end of cutting a round bar.

A third object of the present invention is to provide a saw blade that can finely divide chips generated by cutting with the saw blade and improve chip discharge performance.

A fourth object of the present invention is to provide a saw blade that can cut from difficult-to-cut materials to easy-to-cut materials with the same saw blade.

A fifth object of the present invention is to provide a saw blade that can cut from large diameter materials to small diameter materials with the same saw blade.

[Summary of f-ming] In order to achieve the above objects, the present invention provides a leading tooth that cuts the workpiece in advance in the cutting direction when cutting the workpiece, and a leading tooth that cuts the workpiece that lags behind the leading tooth. A plurality of succeeding teeth cut in order to not make a deep cut into the workpiece and to widen the width of the preceding cutting groove by the preceding teeth. It consists of an appropriate number of pairs of set teeth, and the tooth height from the reference position to the tooth tips of the six pairs of succeeding teeth is greater than the tooth height from the zero position to the tip of the leading tooth. In addition, the setting width of a pair of teeth with a smaller tooth height is set to be larger than the setting width of a pair of teeth with a larger tooth height of the succeeding teeth.

In the above configuration, the set tooth with the smallest tooth height dimension is arranged so as not to be continuous, thereby reducing the load on the tooth with a large tooth height dimension following that tooth.

Furthermore, in the present invention, a succeeding tooth with an intermediate tooth height is provided between a tooth with a small tooth height and a tooth with a large tooth height to serve as a buffer tooth to soften the impact.

Roughly speaking, in the present invention, the starting bending position of a tooth with a small tooth height is bent at a position closer to the tip of the tooth than a set tooth with a large tooth height. In other words, if the set amount is the same, the inner corner of the tip of the tooth can be bent as close as possible to the tip of the tooth, and the tooth itself can provide a buffering effect.

The present invention obtains even greater effects not only by the above-mentioned configurations but also by various combinations of the respective configurations.

[Embodiments of the Invention] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. Although the embodiment will be exemplified in the case of a band saw blade,
The present invention is not limited to band saw blades, but can also be implemented with various saw blades such as circular saw blades or hack saw blades.

First, referring to FIGS. 1(a) to 1<C>, when the saw blade 1 cuts the workpiece W, basically,
A leading tooth 3 which performs cutting of the workpiece W in advance in the direction of cutting into the workpiece W (in the direction of the arrow shown) and a right set which is the first succeeding tooth which performs the first stage of preliminary full expansion cutting. Tooth 7R.

Left set tooth 9L, left set tooth 5m, and right set tooth 11 which are the second succeeding teeth for performing the second stage advanced groove expansion cutting.
R as one group (set).

For example, when the center of the width of the saw blade 1 is set as the reference position F, the leading tooth 3 is at the reference position F, where the tooth height dimension 3H from this reference position ff1F to the tooth tip 3P is added to the second succeeding teeth 5L, 11R by iJ3. Tooth height dimension 5H from to each tooth tip 5P, IIP,
It has a more dog-like shape than IIH. In addition, the first succeeding tooth 7R
The tooth height dimensions 7th and 9th from the reference position F of 19L to each of the tooth tips 7P and 9P are formed at the same height as the preceding tooth 3. Note that the tooth height Ifi7 H2O may be lower than the tooth height dimension 31 of the preceding tooth 3.

However, the leading tooth 3 j3 and the 11th succeeding tooth (f17R1
9L also the second successor! FJ5, 1'I R is the first
As is clear from the figure (tJ), a step is formed in the workpiece W in the cutting direction.

Moreover, as is clear from FIG. 1(b), the leading tooth 3 is
When viewed from opposite to the cutting direction of the workpiece W (direction of arrow B shown in the figure), the saw blade 1 is formed into straight teeth that do not bend in the thickness direction (hereinafter referred to as the left-right direction), and the first The succeeding teeth 7R and 9L are formed into right set teeth and left set teeth, respectively, which are slightly bent in the left and right direction and set out. The second succeeding teeth 5L and 11R are formed as a left set tooth and a right set tooth, respectively, which are largely bent in the left-right direction and set out.

The workpiece W is cut by the saw blade 1 having the above configuration.
! When performing i (cutting), the leading tooth 3 with the largest tooth height XJ method 3 days cuts into the workpiece W first, then the first succeeding tooth 7R19L with the next largest tooth height dimension 7H19H,
Further, the second succeeding teeth 5L and 11R are attached to the workpiece W.
It will be cut into.

In other words, the cut is made into the workpiece W starting from the tooth with the largest tooth height.

The preceding tooth 3 i,,! Since the teeth on the IF right side are straight teeth that are not set out, when the leading tooth 3 cuts into the workpiece W, it cuts straight into the workpiece W without receiving any component force in the left-right direction. Next, when the first vfL continuous blade 7R19L cuts into the workpiece W, the first subsequent f-
Since the teeth 7R19L are right set teeth and left set teeth, respectively, the preceding cutting 1 cut by the tooth tip 3P of the preceding tooth 3
14, the first succeeding south 7R19
Vibration in the left-right direction due to L is suppressed. Second succeeding tooth 5
Similarly to the first succeeding teeth, vibrations in the left and right directions are also suppressed in L and 11R.

Furthermore, the second succeeding teeth 5L and 11R are provided with the smallest tooth height dimension, and as is clear from FIG. 1 (a>),
Since they are arranged so as not to be continuous with each other, the load on the first succeeding tooth 7R1 and the leading tooth 3, which are teeth with a large tooth height following the second succeeding teeth 5L and 11R, is reduced.

Although the above embodiment describes the case where the leading tooth 3 is a straight tooth, for example, as shown in FIG. It is also possible to use a pair of left and right set teeth 3l-13R bent in a manner similar to that of the embodiment shown in FIGS. 1(a) to 1(C).

The structure of this embodiment also has the same functions and effects as those of the previous embodiment.

Furthermore, each tooth 3, 5L, 7R, 9L and 11 of the saw blade 1
Tips 3C15C, 7G, 90 with a dovetail cross section on R
, 110 are fixed to form a repellent clam, as shown in FIGS. 3(a) and 3(b), each chip 3c, .
By changing the tooth height dimensions of 5C, 7C, 9C, and 11C, and by configuring the width dimension of the tip of the tooth to be large for the tip with a small fI height dimension, the same effect as in the embodiment of BO is obtained. It increases the effect by 1q.

As shown in FIG. 3(b), the tooth tip 3P of the leading tooth 3
and the tooth tips 5P of the plurality of subsequent teeth 5L, 7R, 9L, and 11R.
. It is desirable to do so.

The above embodiments are explained using one straight tooth or a pair of set teeth that are slightly bent left and right as the leading tooth 3, and four left and right set teeth as the following teeth 5L, 7R, 9L, and IIR. The case where the teeth are grouped into one group has been explained. However, the number of teeth in one group a'3 is arbitrary; for example, the number of teeth in one group is 4.
．． 5.6°7.8,9. You can select the desired number as...
Differences in the height dimensions and set widths of each tooth can be configured as appropriate.

4(a) to 4(C) show a saw blade 1 with six teeth in one group.
This example illustrates a case where both corner portions of the leading tooth 3 are ground to form inclined portions 3B having the same slope on both sides, and the tip portion of the leading tooth 3 is formed into a substantially V-shape. In this embodiment, one group includes a second leading tooth 3S having the same dimension as the tooth height 3H of the leading tooth 3, and two pairs of trailing teeth 7R, 9.
L, 5L, and IIR are provided. The second leading tooth 3S may have a tooth height slightly smaller than that of the leading tooth 3, and cuts the remaining portion that is not cut by forming the inclined portion 3B at the tip of the leading tooth 3. It is something that works.

That is, according to this embodiment, the leading tooth 3 and the second leading tooth 3S are guided in a straight line by the leading cutting) h, and the same operation and effect as in the previous embodiment are achieved, and the chips are removed. is divided into smaller pieces to improve chip evacuation. Although it is desirable to provide the second leading tooth 3S in order to subdivide the chips, it does not necessarily have to be provided. For example, as shown in FIG. 4(d), the second leading tooth 3S It is also possible to omit it. Furthermore, as a structure for dividing the chips into pieces, for example, as shown in FIG. 4(e), a structure in which an appropriate number of notches 3N having an appropriate shape such as a U or V shape is formed at the tip of the leading tooth 3 is used. It is also possible to do this.

In this case, the remaining portion of the V-shape that is not cut due to the formation of the notch portion 3N will be cut by the second leading teeth 3S.

Next, referring to FIGS. 5(a) to 5(C), the saw blade]
Basically, when cutting the workpiece W, the direction of cutting into the workpiece W (direction of the arrow △ in the figure)
Preceding 1f13 that cuts the workpiece W prior to
and a first succeeding tooth 9L that performs the first stage of advance groove expansion cutting,
7R and 2nd stage leading γIIq widening incision side cutting 2nd succeeding south 5L, 11R and 13L as a buffer tooth for the 753 succeeding tooth, which was designed to reduce the load on the leading tooth (straight tooth) 3. .

15R as one group (human).

For example, when the center of the width of the saw blade 1 is set as the reference position F, the third succeeding parts 131 and 15R are the tooth height dimensions 13H and 15H from this reference position F to the first cutting tip parts 13P and 15P.
Each tooth tip 5 from the reference position F in the subsequent f85111R
Tooth height dimensions 5H, 11H up to P, 11P and preceding ei
(n g ) 3, formed at a height intermediate to the tooth height dimension 3H from the reference position F to the tooth tip 3P, and provided between the second succeeding tooth 11R and the leading tooth (straight WJ) 3. There is.

Note that 5H and 11H may have the same tooth height dimension or may be different.

The swing-out suspension of the clams of the buffer teeth 13L and 15R can be arbitrarily set on the premise that they are smaller than those of the second succeeding teeth 5L and IIR. It is also possible to have straight teeth without bending in the left-right direction.

In other words, when this saw blade takes a cutting order from teeth with small tooth height dimensions to teeth with large tooth height dimensions, there is an intermediate tooth height dimension between the teeth with small tooth height dimensions and the teeth with large tooth height dimensions. Buffer teeth are provided to soften the impact of the next tooth.

Next, FIG. 6 shows the entrance and exit of the tooth tip corner depending on the bending position of the set. The saw blade in this figure has three leading teeth (straight teeth) that cut the workpiece in advance in the cutting direction after cutting the workpiece.
, makes a cut into the workpiece after the leading tooth, and
In order to expand the range of advanced cutting disease caused by the leading tooth, 9L and 7R are provided as one group as a plurality of trailing teeth to be cut. An example in which the tooth height dimension is set small is shown as an example.

Here, what is shown by a dashed line is the case where the clam is set out at the bending position m, and what is shown by the broken line is the succeeding tooth when the clam is set out at the bending position n. Also, each tooth has the same size for swinging out, and the teeth shown by the dashed-dotted line and the teeth shown by the broken line were formed at the same height before swinging out the clam.

As is clear from Fig. 6, it is better to swing out the clam at the bending position n, which is a position closer to the tip of the leading tooth 3, than at the bending position m, which is a position farther from the tip of the leading tooth 3. The inner corner of the tooth tip, which is a part of the tip corner in the opposite direction to the setting direction, rises up significantly compared to the one in which the tooth height dimension d() increases.

In other words, when the cutting whistle of the leading tooth 3 becomes larger, the one in which the clam is swung out at the bending position n is better.
A part of the inner corner of the tip of the tooth can move more easily than when the clam is set out at the bending position m in rows 4 or more, and the tooth itself can provide a buffering effect against the noise generated on the leading tooth 3.

In this example, a set tooth with no other set teeth is shown, but if there are other set teeth, the set bending position of the succeeding tooth with the largest set amount and the smallest tooth height dimension is The bending should be done at a position closer to the tips of the fleas than the small teeth of the fleas.

"Effects of the Invention" As can be understood from the description of the embodiments above, the gist of the present invention is as stated in the claims, and the following teeth are arranged so that two small teeth are not consecutive. The cutting depth of the tooth with a large tooth height that is to be cut after the tooth with a small tooth height is that the saw blade moves two pitches in the cutting direction, which corresponds to one tooth with a small tooth height. The blade becomes a downward slope, and the load generated on the tooth with a large tooth height that performs cutting next to the tooth with a small tooth height is smaller than that of a conventional saw blade.

In addition, when the cutting order of the present invention is from a tooth with a small tooth height dimension to a tooth with a large tooth height dimension, a subsequent tooth with an intermediate tooth height dimension is placed between the tooth with a small tooth height dimension and the tooth with a large tooth height dimension. Loose teeth 1! By providing Ii7 teeth, it is possible to reduce the load generated on teeth with a larger tooth height than in the past.

Furthermore, in the present invention, the set bending position of the tooth with the largest set tip and the smallest tooth height among the succeeding teeth is bent at a position closer to the tooth tip than the south side where the set tip is smaller. Is the inner corner of the tooth easy to move, and the tooth itself has a 4E effect of buffering the load that occurs on a tooth with a large tooth height? It will be done.

The present invention, which consists of three inventions, has great effects even if each invention is implemented individually, but if each invention is used in combination, an even greater effect can be obtained.

In any case of the present invention, d3 does not have the greatest influence on the straightness of the saw blade than d3, and reduces the load on the leading teeth. Therefore, the load generated on each tooth is equalized, resulting in uniform wear, resulting in 'C? This makes it possible to extend the life of the saw blade.

In addition, with the saw blade of the present invention, the load on each tooth is made uniform, and the left and right set teeth work efficiently and can perform balanced cutting from side to side, so the movement of the saw blade in the thickness direction is small. Therefore, it is possible to cut from difficult-to-cut materials to easy-to-cut materials with one type of saw blade.

Furthermore, the saw blade of the present invention can finely divide the chips generated by cutting, and does not lose the effect of improving chip evacuation, and can cut from large diameter materials to small diameter materials with one type of saw blade.
-It is possible.

The saw blade of the present invention can be applied to all types of saw blades if it is used to reduce the work load on teeth that are heavily loaded.

[Brief explanation of drawings]

Figure 1 (a) is a front view of the saw blade, and Figure 1 (b) is the front view of the saw blade.
A sectional view taken along line bb in Figure <a), Figure 1 (
c) is a bottom view. FIGS. 2(a), 2(b) and 2<c> are a front view, a side view taken along line bb and a bottom view, respectively, of the saw blade. FIG. 3(a) and FIG. 3(1)) are a front view d3 and a cross-sectional view taken along the line bb--b of the saw blade, respectively. FIG. 4(a), FIG. 4(b), and FIG. 4<C> are
Front view, bb line sectional view and bottom view of the saw blade, respectively,
FIG. 4(d) and FIG. 4(e) are other embodiments corresponding to FIG. 4(tl). FIG. 5(a), FIG. 5(b) and FIG. 5(C) are a front view, a sectional view taken along line bb and a bottom view, respectively, of the saw blade. FIG. 6 is a side view of the saw blade. Explanation of symbols representing main parts of drawings> 1... Saw blade 3... Leading teeth 5L, 7R
, 9L, 11R, 13L, 13R...Successive teeth

Claims (11)

[Claims] (1) When cutting a workpiece, the leading tooth cuts the workpiece in advance in the cutting direction, and the leading tooth cuts into the workpiece later than the leading tooth, and the width of the leading cutting groove by the leading tooth A plurality of succeeding teeth are provided as one group for cutting in order to expand, and the plurality of succeeding teeth are composed of an appropriate number of pairs of a left set tooth and a right set tooth, and the teeth of the preceding tooth are cut from the reference position. The tooth height from the reference position to the tip of each pair of succeeding teeth is set to be the same or smaller than the tooth height to the tip, and the set width of the pair of teeth with a larger tooth height of the succeeding teeth is set. A saw blade characterized in that a pair of teeth with a smaller tooth height dimension has a larger set width, and furthermore, the following teeth having the smallest tooth height dimension are arranged so as not to be continuous. (2) When the saw blade takes a cutting order from a tooth with a small tooth height to a tooth with a large tooth height, an intermediate tooth is provided between the succeeding tooth with a small tooth height and the leading tooth with a large tooth height. A saw blade according to claim 1, characterized in that it comprises trailing teeth of high dimensions. (3) On the saw blade, the bending position of the tooth with the largest amount of set-up swing and the smallest tooth height is placed closer to the tip of the leading tooth than the bending position of the succeeding tooth with the smallest amount of set-off. The saw blade according to claim 1, characterized in that it has a swing-out bending position. (4) When the saw blade takes a cutting order from a tooth with a small tooth height to a tooth with a large tooth height, an intermediate tooth is provided between the succeeding tooth with a small tooth height and the leading tooth with a large tooth height. In addition to providing a succeeding tooth with a high dimension, the tooth with the largest amount of set-up and the smallest tooth height is placed closer to the tip of the preceding tooth than the bending position of the succeeding tooth with the smallest amount of set-up. The saw blade according to claim 1, characterized in that the saw blade is provided with a bending position for swinging out the clam. (5) The saw blade according to claim 1, wherein the leading tooth is a straight tooth without bending in the left-right direction. (6) A patent characterized in that the preceding teeth consist of a pair of a left set tooth that is bent very slightly to the left and a right set tooth that is bent very slightly to the right. A saw blade according to claim 1. (7) The saw blade according to claim 1, characterized in that the leading tooth is provided with a notch portion on the tooth tip portion to divide the tooth tip portion into a plurality of parts. (8) The saw blade according to claim 1, wherein the tips of the teeth are appropriately arcuate. (9) When cutting a workpiece, the leading tooth cuts the workpiece in advance in the cutting direction, and the leading tooth cuts into the workpiece later than the leading tooth, and the width of the leading cutting groove by the leading tooth A plurality of succeeding teeth are provided as one group for cutting in order to expand, and the plurality of succeeding teeth are composed of an appropriate number of pairs of a left set tooth and a right set tooth, and the teeth of the preceding tooth are cut from the reference position. The tooth height from the reference position to the tip of each pair of subsequent teeth is set smaller than the tooth height to the tip, and the tooth height is set smaller than the set-up width of the pair of teeth with larger tooth height of the succeeding teeth. When setting a large set-up width for a pair of teeth with a small size and taking a cutting order from a tooth with a small tooth height to a tooth with a large tooth height, the following tooth with a small tooth height and the leading tooth with a large tooth height A saw blade characterized in that a succeeding tooth having an intermediate tooth height is provided in between. (10) On the saw blade, the set-up position of the tooth with the largest set-up swing amount and the smallest tooth height is placed closer to the tip of the leading tooth than the bending position of the succeeding tooth with the smallest set-up swing amount. The saw blade according to claim 9, characterized in that it has a swing-out bending position. (11) When cutting a workpiece, the leading tooth cuts the workpiece in advance in the cutting direction, and the leading tooth cuts into the workpiece later than the leading tooth and reduces the width of the leading cutting groove by the leading tooth. A plurality of succeeding teeth are provided as one group for cutting to widen the teeth. The tooth height from the reference position to the tip of each pair of succeeding teeth is set smaller than the tooth height up to The setting width of the pair of teeth with smaller dimensions is set larger, and the bending position of the succeeding tooth with a smaller setting amount is set closer to the tip of the leading tooth.
A saw blade characterized by providing a bending position for setting the tooth with the largest amount of setting and the smallest tooth height dimension.