JPH08300219A - Saw blade - Google Patents

Abstract

PURPOSE: To provide a saw blade capable of shortening a time needful to concurrently perform bending work in right and left directions right and left setting teeth in a succeeding tooth to a preceding tooth, almost eliminating the occurrence of a ghost pattern and moreover of a swell pattern at the time of cutting, having a small cut curve at the time of cutting and more stableness, and relizing stabler cutting work. CONSTITUTION: In sawteeth 1 provided with preceding teeth 5 composed of straight teeth performing no offsetting in right and left directions, and succeeding teeth 7 for cutting a cut groove in order to expand the width of the cut groove by the preceding teeth 5; the succeeding teeth 7 are provided with right and left setting teeth 7R and 7L bent in right and left directions by forming splits 7D into nearly middle parts of a teeth line in the thickness direction of edges, and interval dimensions on the tip inner sides in the right and left setting teeth 7R and 7L are smaller than the thickness dimensions of the preceding teeth 5. Moreover, the thickness of the vicinities of the tip parts of the right and left setting teeth 7R and 7L is neary equal to the thickness of the vicinities of the respective base parts.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a saw blade such as a band saw and a circular saw.

[0002]

2. Description of the Related Art Conventional saw blades such as band saws and circular saws are
For example, as shown in FIGS. 12 (A) and 12 (B), a straight tooth 101S, a left tooth 103L and a right tooth 10
3R as one group, for example, as shown in FIG.
As shown in (B), the straight teeth 105S, the left teeth 107L, the right teeth 107R, the left teeth 109L.
Also, a group in which the right set teeth 109R are grouped is known.

Left teeth 103L of each saw blade,
107L, 109L and right teeth 103R, 107
Both R and 109R are independently bent,
As shown in FIG. 14, when the workpiece W is cut by each saw blade, the interference between the workpiece W and the body 111 of each saw blade is prevented.

However, the left set teeth 103L, 107L. 109L and right crest 1
Since 03R, 107R, and 109R are independent, when cutting the work material W, the left flank teeth 103L, 107L, 1
Each of 09L and the right set teeth 103R, 107R, and 109R is cut by the saw blade being swung to the left or right when the work material W is rushed. Looking at the cut surface of the cut work W, a so-called Ouray pattern 113 appears as shown in FIGS. 15 (A), (B), and (C).

This phenomenon that each saw blade swings to the left and right is a problem particularly in heavy cutting. When the feed rate exceeds a certain limit, it is shown in FIGS. 16 (A), (B) and (C). As described above, a swelling pattern 115 having a swelling amount a is generated on the work material W, which leads to bending.

[0006]

By the way, FIG.
In each of the saw blades shown in (A), (B) and FIGS. 13 (A), (B), since the left and right crest teeth are displaced to the front and the rear in the traveling direction of the saw blade, the left and right with respect to the traveling direction. And a Yurei pattern 113 is generated. In addition, since a swelling pattern 115 is generated in cutting with a large depth of cut,
As a measure to prevent the saw blades from swinging to the left and right, it is necessary to cut the left and right set teeth on the same tooth so as to face each other at the same time.

A saw blade as shown in FIG. 17 is known as a repellent saw blade as a saw blade for cutting in the same tooth at the same time on the left and right sides. That is, in FIG. 17, the leading tooth 117 and the trailing tooth 119 having a repellent shape are formed, and the leading tooth 117 is a high tooth and the trailing tooth 119 is a low tooth.

However, as shown in FIG. 17, in order to obtain the side clearance angle α ', the surface d must be finished by polishing, and there is a problem that it takes a lot of time for processing. Further, as shown in USP 3,576,061, the same problem occurs when the rake face inclination angle is provided.

Further, the chainsaw as shown in USP 3,367,216 is for woodworking, and the tip of the tooth is insufficient for cutting metal. Also, USP3
Saw blades such as those shown in 651, 841 are for wood, organic materials (cork, rubber, bone, etc.) and are sometimes used for metal cutting, but in this case as well, the tip strength is Not enough. Especially not suitable for heavy cutting.

In the circular saws disclosed in Japanese Utility Model Publication No. 62-28336 and Japanese Patent Publication No. 62-5730, the tooth line divided at the center of the tooth line in the thickness direction of the tooth tip is perpendicular to the body side face. Yes, if the cut chips are settled in the gullet and the chips are welded, the chip removability with a chip removing device (wire brush, etc.) is poor and tip chipping due to welding occurs. . In addition, when the tip of the leading tooth is chipped and the wear of the trailing tooth that has a groove in the tooth tip center portion progresses and the cutting depth becomes larger than the tooth tip center groove depth of the trailing tooth, the cutting powder is divided. Not be
Cutting resistance increases and welding strength also increases, resulting in frequent tip chipping.

Further, as a prior art example, Japanese Patent Laid-Open No. 54-45
In No. 895, a V-shaped groove is formed in the center of the tooth tip of the saw blade to divide the tooth tip into right and left portions so that the tip portion projects from the side surface of the body portion of the saw blade.

In the above construction, the left and right divided tooth tips are sharply formed, so that the tooth tip strength is low and it cannot be cut at all when the work material is metal.

An object of the present invention is to enable the left and right teeth of the trailing tooth to be bent simultaneously in the left and right directions simultaneously with respect to the leading tooth in a short time, and almost no Yurei pattern is generated. The purpose of the present invention is to provide a saw blade that does not generate a swelling pattern at the time of cutting and has little bending at the time of cutting, which enables more stable cutting.

[0014]

The present invention has been made in view of the above problems, and the invention according to claim 1 is
In a saw blade provided with leading teeth made of straight teeth that do not project in the left-right direction and trailing teeth that cut to widen the width of the cutting groove formed by the leading teeth, the trailing teeth are It is provided with left and right bevel teeth that are bent in the left-right direction at a substantially central portion of the tooth line in the thickness direction, and the distance between the inner ends of the left and right bevel teeth is smaller than the thickness of the preceding tooth. .

With the above structure, when cutting a work piece with the succeeding teeth, the right and left teeth of the trailing teeth simultaneously act on the work piece at the same location, so that the left and right component forces oppose each other. Therefore, the saw blade can be effectively prevented from vibrating in the left-right direction. Therefore, there is almost no Yurei pattern that tends to occur during the cutting of the work material, and it is possible to prevent the formation of a wetting pattern that tends to occur during cutting.

Further, since the space between the front teeth on the right and left flank teeth of each trailing tooth is smaller than the thickness of the front teeth, the triangular portions without being cut between the left and right flank teeth are different from each other. Since the cutting is performed by the leading teeth, it is possible to reliably cut the metal material.

According to a second aspect of the present invention, in the first aspect of the invention, the thickness of the left and right flank teeth near the tips is substantially equal to the thickness near the bases thereof. The thicknesses of the right and left set teeth provided for the succeeding teeth are substantially equal over the entire length, and have high strength.

In other words, since the cross-sectional shapes of the left and right flank teeth are rectangular, it is easy to maintain the strength of the tooth tip corners, the wear resistance is improved, and the cutting resistance is caused during heavy cutting. With little deformation, it is possible to perform heavy cutting with good efficiency.

A saw blade according to a third aspect of the present invention is characterized in that the trailing tooth is formed of a plurality of teeth, and the trailing tooth is formed so that the amount of extension increases as the height of the trailing tooth decreases.

In the saw blade according to the third aspect of the present invention, the number of trailing teeth is plural, and the height of the trailing teeth is decreased so that the amount of protrusion is increased. When you do, there is almost no Yurei pattern,
A swelling pattern does not occur during cutting and the bending at the time of cutting is small, and more stable cutting is possible. Also,
If the number of trailing teeth in one group is random, it is not necessary to bend the left and right trailing teeth according to a certain rule, and it is possible to bend the left and right teeth simultaneously in a shorter time than polishing. Also, the cutting resistance can be reduced by being distributed to each tooth.

Further, since the space between the front teeth on the left and right flank teeth of each trailing tooth is smaller than the thickness of the front teeth, the triangular portions without being cut between the left and right flank teeth are different from each other. Since the cutting is performed by the leading teeth, it is possible to reliably cut the metal material.

In the saw blade of the invention according to claim 4, when the dimension A of the dividing position of the succeeding tooth is T, the thickness of the body is T /
2-0.1 mm ≦ A ≦ T / 2 + 0.1 mm.

A saw blade according to a fifth aspect of the present invention is a saw blade, in which β _L > 0 ° and β _R > 0 °, where β _L and β _R are the tooth line inclination angles of the left and right teeth of the following tooth. It is characterized by including teeth.

A saw blade according to a sixth aspect of the present invention is characterized in that 20 ° ≦ θ ≦ 90 °, where θ is a division angle of the subsequent tooth.

In the saw blade according to claim 4, when the dimension A of the dividing position of the succeeding tooth is T, the thickness is T / 2-0.1 m
m ≦ A ≦ T / 2 + 0.1 mm, the saw blade according to claim 5, the tooth line inclination angles of the left and right teeth of the succeeding teeth are β _L ,
When β _R , the trailing teeth having β _L > 0 and β _R > 0 are included, and when the cutting angle of the trailing teeth is θ in the saw blade according to claim 6, 20 ° ≦ θ ≦ 90 ° Therefore, there is almost no Yurei pattern when cutting,
A swelling pattern does not occur during cutting and the bending at the time of cutting is small, and more stable cutting is possible.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings.

Referring to FIGS. 1 (A), (B) and (C), tool steel is used as a saw blade material, but in this example, the saw blade material is, for example, a high-speed tool steel ( HSS)
The saw blade 1 using the has a body portion 3 in the longitudinal direction, and the body portion 3 has leading teeth 5 made of rectangular straight teeth that do not project in the left-right direction, and the leading teeth 5. Subsequent teeth 7 for cutting to widen the cutting groove by are formed as one group. The leading end portion of the succeeding tooth 7 is divided into right and left portions by cutting a substantially central portion of the tooth line in the thickness direction. The straight tooth line in the left-right direction before being divided exists as a tooth line 7T of the left and right crest teeth 7L, and is divided into two parts. Clam teeth 7L and 7R are formed. Further, the height of the succeeding tooth 7 is lower than the height of the leading tooth 5 as well shown in FIG. 1 (C).

More specifically, the left and right set teeth 7L and 7R of the trailing tooth 7 are sawtoothed by inserting a split 7D at approximately the center of the tooth line in the thickness direction of the trailing tooth 7 to expand it into a V shape. The blade 1 is bent at the same time in the left-right direction with respect to the traveling direction of the blade 1 and is swung out.
The outer tips 7EO of L and 7R project outward in the left-right direction from the thickness of the leading teeth 5, but the spacing dimension of the inner tips 7EI is smaller than the thickness of the leading teeth 5.

When the work material is cut by the saw blade 1 having the above-described structure, the leading tooth 5 precedes and cuts into the work material to linearly form a cutting groove. Next, the left and right set teeth 7L and 7R of the succeeding tooth 7 perform cutting so as to widen the cutting groove.

As described above, when cutting a work material,
Since the left and right set teeth 7L and 7R of the succeeding tooth 7 simultaneously act on symmetrical positions of the work material, the left and right set teeth 7L and 7L
The component forces in the left-right direction acting on 7R oppose each other and cancel each other out, so that vibration of the saw blade 1 in the left-right direction is prevented.

Therefore, it is possible to prevent the generation of a so-called Urey pattern, and it is possible to effectively prevent the generation of a splash pattern during cutting.

As can be seen, the left and right crest teeth 7
Since L and 7R are bent and swung out simultaneously by inserting the split 7D, the thicknesses of the left and right flank teeth 7L and 7R in the vicinity of the tip portion and the thickness in the vicinity of the base portion are substantially equal, and the sectional shape is Has a rectangular shape.

That is, the thickness of the left and right set teeth 7L and 7R is substantially constant over the entire length, so that the strength can be easily maintained and the wear resistance at the time of cutting can be easily improved. is there.

FIGS. 2A to 2D show examples of other embodiments of the saw blade. 2 (A) to 2 (D), the saw blade 1 has a body portion 3 in the longitudinal direction, and one side portion of the body portion 3 has leading teeth 5 made of rectangular straight teeth, and Subsequent teeth 7 that cut to widen the cutting groove formed by the preceding teeth 5 are formed as one group. The number of the subsequent teeth 7 is randomly plural. The leading tooth 5 is shown in FIG.
In between, there are shown a group 7A having the trailing teeth 9, 11, 13 as one group, a group 7B having the trailing teeth 15, 17, 19, 21, 23 as one group and a trailing tooth 25. Moreover, for example, the tips of the succeeding teeth 9, 11, and 13 are divided into the left and right by splitting in the substantially central portion of the thickness direction tooth line, and the tooth line before the division is the left crest tooth 9L, 11L, 13L, right crest teeth 9R, 11R,
It exists as a tooth line divided into 13R, and is formed by being bent out by being bent simultaneously to the left and right.

In the group 7A, the tooth heights of the trailing teeth 9 and the trailing teeth 13 are substantially equal to each other, and the tooth height dimension of the center trailing tooth 11 is slightly smaller than that of the trailing teeth 9 and 13. is there. Then, the left and right swing-out amounts of the left and right set teeth 9L and 9R in the subsequent tooth 9 (set width)
Is the right and left set teeth 13L and 13R of the succeeding tooth 13.
It is set to be almost equal to the clam width. Center posterior tooth 11
The clam widths of the left and right clam teeth 11L and 11R in
Left and right set teeth 9L and 9 in the succeeding teeth 9 and 13
R; formed slightly larger than the clam width of 13L and 13R.

In the group 7B, the trailing teeth 15,
23 tooth height dimension and left and right set teeth 15L, 15R;
The clam widths of 23L and 23R are formed to be almost equal.
The tooth heights of the trailing teeth 17 and 21 are smaller than the tooth heights of the trailing teeth 15 and 23.
L, 17R; 21L, 21R clam width is almost equal,
Moreover, it is formed to be slightly larger than the crest width of the succeeding teeth 15 and 23. The center trailing tooth 19 is formed to have the smallest tooth height, but the left and right set teeth 19L and 19R are set to the maximum set width.

Since the trailing tooth 13 of the group 7A and the trailing tooth 15 of the group 7B have a straight tooth between them as the leading tooth 5, it is desirable that the tooth height dimension and the crest width of the tooth are substantially equal to each other. However, in some cases, it is not always necessary to provide them substantially equally.

The tooth height dimension of the trailing tooth 25 and the tooth flank widths of the left and right bevel teeth 25L and 25R are set substantially equal to the tooth height dimension and the tooth flank width of the trailing tooth 23 located on the opposite side of the straight tooth as the leading tooth 5. Is desirable. However, it is not always necessary to provide them substantially equally.

In the saw blade 1 having the above-mentioned structure, since each succeeding tooth is symmetrically provided with the left and right crest teeth which are divided into left and right, the same operational effect as the saw blade 1 illustrated in FIG. 1 can be obtained. Along with the fact that a plurality of trailing teeth are provided for grouping, and the distance between the tips of the right and left crest teeth of each trailing tooth is smaller than the thickness of the leading tooth,
Since the portions which remain in a triangular shape without being cut between the left and right set teeth are cut by the respective preceding teeth, it is possible to surely cut the metal material. Further, when the cutting groove of the preceding tooth 5 is expanded, the cutting amount for expanding is dispersed to each succeeding tooth so that the cutting resistance of each succeeding tooth can be suppressed to be small and the cutting powder can be subdivided. be able to.

Further, since the cutting resistance of each succeeding tooth can be dispersed in a small amount, the component force in the left-right direction acting on the right and left teeth of each succeeding tooth becomes small, and the vibration of the saw blade 1 in the left-right direction is effectively suppressed. In addition, the accuracy of the cut surface can be improved.

It is desirable that the number of the succeeding teeth when grouping the succeeding teeth is an odd number. However, even numbers are acceptable. Further, the preceding tooth 5 as a straight tooth may be continuously provided in a front-back manner. That is, the number of trailing teeth and the number of leading teeth in each group may be random. Further, the pitch of the leading tooth and each trailing tooth may be equal or unequal.

As described above, FIG. 1 (A) to (C), FIG.
By setting the saw blades 1 as shown in (A) to (D), the tip portions of the succeeding teeth 7 to 25 are divided from the leading tooth 5 at approximately the center of the tooth line in the thickness direction. Left and right teeth 7L to 25L and right teeth 7R
25R can be formed by being symmetrically swung out left and right. In addition, the bending process can obtain the side clearance angle in a shorter time than the conventional polishing process.

Further, when the work material is cut by using each of the saw blades 1, there is almost no Yurei pattern, no waviness pattern is generated, and the bending at the time of cutting is small, and the cutting process can be performed. . Moreover, since the strength of the tip corner portion of the succeeding tooth is large, more stable heavy cutting can be performed.

As shown in FIG. 3, for example, the trailing tooth 7 among the trailing teeth is divided into the left and right from the substantially central portion of the tooth line in the thickness direction of the tooth tip, so that the left flaring tooth 7 is easily formed.
It is possible to widen the grinding width between L and the right grinding tooth 7R with respect to the thickness of the preceding tooth 5. In addition, the left and right divisions are performed in a short time, and bending can be performed simultaneously on the left and right sides and symmetrically.

In the succeeding tooth 7 of FIG. 3 (a view seen from the line III--III of FIG. 1B), the side surface of the body

[Outside 1] Set to 9. The points 1 and 9 are the starting points for the side surfaces a and b to be drawn out.

The side surface on the tooth 7L side is the surface e, the side surface on the tooth 7R side is the surface f, and the most protruding points are points 2 and 8, respectively. This is the measurement point of the amount of protrusion (clam width). Tooth center groove 7L tooth side surface is surface i, 7R tooth side surface is surface j, groove vertex is point 5 and point 5 is

[Outside 2] To do.

[0047]

[Outside 3] The tooth lines are called lines and k and l, respectively.

[Outside 4] The points farthest from are points 3 and 7.

The leading tooth 5 and the trailing tooth 7 in FIGS. 3 and 4 are drawn in bold and the surfaces a, b, e, f, i, j and the lines k, l are shown.

[0049] T: surface a, the distance between b D _L: distance between the points 2, 4 D _R: distance between the points 6 and 8

[Outside 5] H: The distance between the tip end of the leading tooth 5 and the point 3 or the distance between the tip end of the leading tooth 5 and the point 7 whichever is smaller. Seen from the line IV-IV in FIG. 1B. Figure), Figure 5 (Figure 1
5 as seen from the direction A-A), the intersection of the kerf of the preceding tooth 5 and the succeeding tooth 7 is located on the 7L tooth side of the succeeding tooth 7.

[Outside 6] Here, as shown in FIG. 3, for example, when the thickness A of the trunk portion is T, the dimension A of the dividing position of the subsequent tooth 7 is T / 2−0.1 mm ≦ A ≦ T / 2 + 0. It is good to set it to 1 mm. A = T / 2 is preferable, but it is considered that there is a change in the material shape, etc., and as a result of the cutting test, ±
The allowable range was a deviation from T / 2 of about 0.1 mm. On the other hand, if it exceeds 0.1 mm, the left and right swing amounts are too different, and the saw blade tends to have a long life due to early bending of the surface to be cut, defective cutting surface, and the like.

As shown in FIG. 4, the left set teeth 7
L, the tooth line inclination angles β _L and β _R of the right set tooth 7R are β _L >
0 ° and β _R > 0 ° are desirable. If β> 0 °, even if the tooth tips of the leading teeth 5 are clogged due to welding or are chipped due to other reasons and the cutting depth is larger than the split depths B _L and B _{R and} heavy cutting is performed. Since the cutting chips cut by the left and right set teeth 7L and 7R have winding directions of β _L and β _R and are in opposite directions, the cutting chips are divided at the center portion. Further, since the cutting powder is wound in the shape of a spring, the cutting powder can be easily removed by a cutting powder removing device (such as a wire brush), and tip chipping due to welding is reduced. The dimension A of these dividing positions and the range of the tooth line inclination angle β (meaning angles β _L and β _R ) are based on the experimental results.

As a tool or method used for shunting the tooth center to the left and right by subjecting the tooth center to a split bending process, a wedge-shaped tool having a cutting edge R having one cutting angle θ is used. When bending while pressing and splitting.
[FIG. 18- (A)], when performing bending while pressing once with one wedge-shaped tool having a cutting edge R having various cutting angles θ or a wedge-shaped tool spreading in an arc.

[FIG. 18- (B)] In the case where bending is carried out while pressing and splitting several times by using several kinds of tools having a cutting edge sharpness or a cutting edge R having one cutting angle θ. [FIG. 18- (C)] First, in the case where T / 2 tooth materials are joined and then spread with a tool having a wedge shape or the like. [FIG. 18- (D)], when a notch is made in the approximately center part of the tooth line in the thickness direction of the tooth tip with a cutting means such as a grindstone or the like is subjected to a cutting process, and then widened by a wedge-shaped tool. [FIG. 18- (E)] and the like are possible.

The shape of the completed tooth center groove may be any shape. For example, a V type, a U type, a circular type, a concave type, a convex type, a multi-stage type and the like as shown in FIGS. 6 (A) to 6 (F) can be considered.

In the case as shown in FIGS. 1 (A) to 1 (C) in which the leading tooth 5 and the trailing tooth 7 are grouped one by one, that is, the tooth center groove shape is V-shaped and cold. In the case of bending at the same time while splitting with one tool in one pressing in the inter-working, the dividing angle θ is preferably 20 ° ≦ θ ≦ 50 °, and if θ <20 °, the dividing tool is easily chipped,
Moreover, it is not possible to obtain a sufficient amount of money. If θ> 50 °, V
A crack is likely to occur near the groove-shaped apex 5 and the strength of the tooth tends to be insufficient. However, even if θ> 50 °, it can be used for cutting, and even if θ = 90 °, if the work material is a free-cutting material, tooth breakage does not occur.

The side clearance angle α (meaning α _L and α _R ) is preferably 5 ° ≦ α ≦ 20 °, and more preferably 10 °. Conventionally, when the side clearance angle is obtained by polishing, α
≦ 4 °. This is the maximum side clearance angle because the saw blade body is damaged due to the shape of the grinding wheel. Further, in this case, if the wear of the cutting edge progresses, the cutting tooth portion will disappear early. However, if α ≧ 5 °, the above-mentioned clam width becomes large, the progress of wear is slow, and cutting is possible for a long time. Also, if α> 20 °, cracks may occur at the V-groove apex 5 and the tooth portion strength tends to be insufficient. Moreover, it is expected that cutting will be difficult due to poor tooth tip shape.

The amount of swing-out C (meaning C _L and C _R ) is 0.1 mm ≦ C ≦ 0.5 mm, preferably 0.25 mm. When C <0.1 mm, the amount of protrusion (projection amount) is small, and if the wear progresses, the cutting edge portion is likely to disappear early. When C> 0.5 mm, the width of the kerf becomes too wide and the resistance during cutting tends to increase. In addition, cracks are likely to occur in the vicinity of the V-groove-shaped apex 5, and the strength of the tooth tends to be insufficient.

Further, the dividing depth B (meaning B _L and B _R ) is 0.5 mm ≦ B ≦ 2.0 mm, 1.0
mm is desirable, and when B <0.5 mm, sufficient swing cannot be obtained. When B> 2.0 mm, V-groove shaped apex 5
Cracks are likely to occur in the vicinity, and the strength of the teeth is likely to be insufficient.

The height difference H from the leading tooth 5 is 0.02≤H≤
Although 0.5 mm is preferable, H = 0.15 mm is preferable. If the succeeding tooth before splitting and the preceding tooth have the same height, if the machining is performed under the condition that the height difference of splitting angle θ = 20 ° and amount of protrusion C = 0.1 mm is the most difficult, the succeeding tooth after splitting will be 0.02 mm lower. Further, when H> 0.5 mm, the leading tooth is 0.5 on the tip side surface at the initial stage of the inrush cutting of the work material.
Since the cutting is performed while rubbing more than mm, the resistance at the start of cutting is large, the wear progresses quickly, and the life of the saw blade is likely to be early. In addition, thick burrs are generated at the end of cutting, which makes removal difficult.

However, two-stage splitting (putting splits twice),
The above does not apply when the material is divided by a method such as dividing into three steps (inserting in three times) or hot working.

The ranges of the side clearance angle α, the division angle θ, the division depth B, the amount of protrusion C, and the height difference H from the preceding tooth are based on the experimental results.

The preceding tooth 5 is one or a plurality of consecutive teeth, and the number of succeeding teeth is one at random.
In the case shown in FIGS. 2 (A) to 2 (D), which is a group, in addition to the effect further than in FIGS. 1 (A) to 1 (C),
It has the effect of reducing cutting resistance. FIG. 2 exemplifies a random number of subsequent teeth of 3, 5, and 1 tooth, but this random number has a constant number of teeth, for example, 3 teeth are constant and 5 teeth are constant. Things are also included. Further, a group in which the number of teeth is random does not have the same cycle in one saw blade, and a group in which a group of a plurality of random teeth has periodicity is also included. When the tooth center groove shape of the succeeding tooth is V-shaped and bending is performed at the same time while splitting by cold working at one time, the dividing angle θ is as described above.

The side clearance angle α is preferably 0 <α ≦ 20 °. If α> 20 °, cracks are likely to occur at the V-groove apex 5 and the tooth portion strength is likely to be insufficient.

It is desirable that the amount of swaying-out C is in the range of 0 mm <C ≦ 0.5 mm, and it is preferable that the amount of squeezing-out is different within one group. When C> 0.5 mm, the width of the kerf becomes too wide and the resistance during cutting tends to increase. Further, cracks are likely to occur near the V-groove-shaped apex 5 and the strength of the tooth tends to be insufficient. Furthermore, the dividing depth B is 0 mm <
A range of B ≦ 2.0 mm is desirable, and it is an effective value for processing the swing-out amount within the above range. B> 2.0 mm
In this case, cracks are likely to occur near the V-groove-shaped apex 5 and the strength of the tooth tends to be insufficient.

The height difference H from the leading tooth 5 is 0≤H≤0.5.
The range of mm is desirable, and when H> 0.5 mm, the leading tooth performs cutting while rubbing the tip side surface larger than 0.5 mm at the initial stage of the work material inrush cutting, so the resistance at the start of cutting is large and the wear progresses. Is likely to be faster, which leads to early saw blade life. In addition, thick burrs are generated at the end of cutting, which makes removal difficult. In the case of 0 mm> H, since the inside of the tooth tip of the divided flank tooth is deformed into a curve, the resistance at the time of cutting becomes large and the life of the saw blade becomes early. However, this does not apply to the case of dividing into two steps, three steps, hot work, or the like.

The ranges of the side clearance angle α, the division angle θ, the division depth B, the amount of protrusion C and the height difference H from the preceding tooth are based on the experimental results.

The tooth line width of D (meaning D _L and D _R ) is D
> C (D _L > C _L , D _R > C _R ), and T / 2 <D may be obtained depending on the split bending method, but D = T / 2 is preferable. If D = T / 2, the deformation of the tooth line of the tooth tip is small and the optimum tooth tip shape is obtained.

(Example) With a saw blade having the same pitch tooth profile,
The conventional saw blade (α ′ = 11 shown in FIGS. 12A and 12B)
°, the amount of protrusion 0.4 mm, and the saw blade 1 (H = 0.15 mm, α = 10 °, β = 8 °, θ of this embodiment shown in FIG.
= 30 °, B = 1.0 mm, C = 0.25 mm), the work material S45C, φ250 is saw speed 30 m / mi.
The feed amount (cutting amount) was changed by n to compare the state of the amount of swelling, and continuous cutting was performed at a constant feed amount to compare the bending amount. The results are shown in FIGS. 7 and 8. Here, the feed amount is obtained by the method shown in FIG.

As shown in FIGS. 7 and 8, the conventional saw blade has a feed rate of 50 mm / min and a swell amount of 0.3 m.
m, and under that condition, the amount of bending as shown in FIG. 20 reached 2.0 mm by cutting 50,000 cm ² . On the other hand, in the saw blade 1 of the present embodiment, the amount of swelling did not occur at the feed amount of 50 mm / min, and even after cutting 150,000 cm ² , the bending amount shown in FIG. 20 was 0.3 mm.

As shown in FIG. 9, in the graph showing the relationship between the split position and the cutting area, 0 is an average of about 250,000c for a saw blade in which all teeth are cut at the position of A = T / 2.
m ² can be cut, and 0.1 mm and -0.1 mm have a maximum splitting position of 0.1 mm on the L side and R side in a single saw blade.
An average of about 100,000c with teeth that are out of alignment
m can be ² cut, 0.2mm, -0.2 mm is L-side, up to the respective R side 0.2mm in the saw blade of the split position one
Approximately 20,000 cm with teeth that are displaced close together
^{2 This} shows that the cutting was successful. Cutting area 10
When 50,000 cm ² is the acceptance line, the dividing position ±
The allowable range was a deviation of 0.1.

As shown in FIG. 10, the graph of the relationship between the split position and the surface roughness is 50,00 of S45Cφ250.
Rma of work material surface roughness at 0 cm ² cutting and saw blade life
x is shown. Moreover, the surface roughness of the conventional clam saw blade using high speed tool steel for tooth material is also shown. In the case of this graph, the dividing position A is T /
It is Rmax when cut with a saw blade that varies in the range of 2-0.1 mm ≦ A ≦ T / 2 + 0.1 mm, and the cut surface roughness up to this variation is equivalent to that of a conventional clam saw blade. When it becomes ± 0.2 mm, the life of the saw blade is reached before cutting 50,000 cm ^2, and there is no data so it cannot be cut.

The present invention is not limited to the examples of the embodiments described above, but can be implemented in other modes by making appropriate changes. In the example of the present embodiment, as the preceding tooth 5, a rectangular straight tooth as shown in FIGS. 1A to 1C and FIGS. 2A to 2D has been described as an example. As shown in FIGS. 11A and 11B, the tip is trapezoidal, or a V-shaped notch is formed at the tip at positions displaced from the center of the tooth line in the thickness direction tooth line to the L side and the R side, respectively. Various shapes such as a straight tooth having a tooth are possible. Further, as shown in FIG. 21, the V-shaped notch of the tooth pattern in FIG. 11B may be U-shaped, rectangular, trapezoidal, or the like.

Although the case where the work material is S45C has been exemplified, the metal material is not limited to S45C, and the metal blade according to this example can be applied to the cutting of general metal materials. It is a thing.

[0073]

As can be understood from the above description of the embodiments, the invention according to claim 1 is such that the leading tooth is a straight tooth that does not project in the left-right direction and the leading tooth. In a saw blade comprising a trailing tooth that is cut to widen the width of the cutting groove by, the trailing tooth is bent in the left-right direction by cutting the tooth line in the center of the tooth line in the thickness direction. The left and right flank teeth each have a distance between inner ends of tips which is smaller than the thickness of the preceding tooth.

Therefore, when the work material is cut by the succeeding teeth, the left and right crest teeth provided on the succeeding teeth act on the work material at the same place at the same time, so that the component forces in the left and right directions oppose each other. The vibrations of the saw blades are canceled out, and the lateral vibration of the saw blade can be effectively prevented. Therefore, it is possible to effectively prevent the generation of a weaving pattern that tends to occur during cutting of the work material and a swelling pattern that tends to occur during cutting.

Further, since the space between the front teeth on the left and right flank teeth of each succeeding tooth is smaller than the thickness of the front tooth, the left and right flank teeth have triangular portions without being cut. Since the cutting is performed by the leading teeth, it is possible to reliably cut the metal material.

According to a second aspect of the present invention, in the first aspect of the invention, the thickness of the left and right flank teeth near the tips is substantially equal to the thickness near the bases thereof. The thickness of the right and left set teeth provided on the succeeding tooth is substantially equal over the entire length, and the tooth tip strength is large.

In other words, since the cross-sectional shapes of the left and right flank teeth are rectangular, it is easy to maintain the strength of the tooth tip corners, the wear resistance is improved, and the cutting resistance during heavy cutting results. With little deformation, it is possible to perform heavy cutting with good efficiency.

According to the third aspect of the present invention, since the plurality of trailing teeth are formed and the amount of protrusion is increased as the height of the trailing teeth becomes lower, it is possible to cut the material to be cut. In addition, there is almost no Yurei pattern, a swell pattern does not occur in cutting, the bending at the time of cutting is small, and more stable cutting is possible.

When the number of trailing teeth in one group is random, it is not necessary to perform the left and right bending of the trailing teeth according to a certain rule, and it is possible to perform the bending at the same time in a shorter time than the polishing. It is possible to reduce the cutting resistance by distributing it to each tooth.

In the invention according to claim 4, when the dimension A of the dividing position in the succeeding tooth is the body thickness T, T / 2−0.1 m
m ≦ A ≦ T / 2 + 0.1 mm, and in the invention according to claim 5, the tooth line inclination angles of the left and right teeth of the succeeding teeth are β _L >.
0, β _R > 0, and in the case of the invention according to claim 6 where the cutting angle at the succeeding tooth is θ, 20 ° ≦ θ ≦ 90 °, so there is almost no Yurei pattern when cutting is performed, A swelling pattern does not occur during cutting and the bending at the time of cutting is small, and more stable cutting is possible.

That is, according to the present invention, it is possible to effectively suppress the generation of the Ourley pattern and the swelling pattern, which tends to occur when the work material is cut by the saw blade, and to improve the cutting efficiency and the cutting accuracy. The life of the saw blade has been greatly improved due to the bending.

[Brief description of drawings]

1A is a top view showing an example of an embodiment of a saw blade of the present invention, FIG. 1B is a front view of FIG. 1A, and FIG. 1C is an IC-IC line of FIG. It is the side view which followed.

FIG. 2A is a top view showing an example of another embodiment of the saw blade of the present invention, and FIGS. 2B, 2C and 2D are B- of FIG.
It is a side view which followed the CC line and the CC line.

FIG. 3 is an explanatory view for explaining the dimension of the cutting position when cutting the subsequent tooth of the saw blade according to the present invention, and is II in FIG. 1 (B).
It is an arrow view along the I-III line.

FIG. 4 is a top view showing details of a posterior tooth, and is an IV of FIG. 1 (B).
FIG. 4 is a view taken along line IV-IV.

FIG. 5 is a view of a cutting groove formed by a leading tooth and a trailing tooth as seen from a traveling direction of a saw blade.

FIG. 6 is a view showing various tooth center groove shapes in a succeeding tooth.

FIG. 7 is a relationship diagram showing the relationship between the feed amount and the amount of swell when a work material is cut using a conventional saw blade and the saw blade of the present embodiment.

FIG. 8 is a relationship diagram showing a relationship between a cutting area and a bending amount when a work material is cut using a conventional saw blade and the saw blade of the present embodiment.

FIG. 9 is a diagram showing a relationship between a split position and a cutting area in a posterior tooth of the present invention.

FIG. 10 is a diagram showing the relationship between the split position and the surface roughness of the subsequent tooth according to the present invention.

FIG. 11 is a diagram showing another example of the leading tooth of the present invention.

FIG. 12A is a top view showing a conventional saw blade, and FIG. 12B is a side view of FIG.

FIG. 13 (A) is a top view showing another conventional saw blade,
(B) is a side view of (A).

FIG. 14 is a cross-sectional view showing a state in which the work material is cut by the saw blade of FIGS. 12 and 13.

FIG. 15 (A) is a perspective explanatory view showing a cut surface of a cut work material, and (B) and (C) are BB and CC of (A).
It is an arrow view along the line.

FIG. 16 (A) is a perspective explanatory view showing swelling in a cross section of a cut work material, and (B) and (C) are BB and C.
It is an arrow line view along the C line.

FIG. 17 is a side view showing another conventional saw blade.

18 (A) to (E) are explanatory views showing a tool and a method for forming left and right set teeth on subsequent teeth, respectively.

FIG. 19 is an explanatory diagram of a method for obtaining a feed amount (cut amount).

FIG. 20 is a perspective explanatory view showing the amount of bending at the cut surface of the work material.

FIG. 21 (A) is a top view showing an example of the shape of the notch in the leading tooth, and FIG. 21 (B) is a view taken along the line BB of FIG. 21 (A).

[Explanation of symbols]

1 Saw Blade 3 Body 5 Preceding Tooth 7, 9, 11, 13, 15, 17, 17, 19, 21, 23
25 Subsequent teeth 7L, 9L, 11L, 13L, 15L, 17L, 19
L, 21L, 23L, 25L Left set teeth 7R, 9R, 11R, 13R, 15R, 17R, 19
R, 21R, 23R, 25R Right bevel tooth T Body width A Dimensions of cutting position α Side clearance angle θ Cutting angle B Cutting depth C Deflection amount

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] March 26, 1996

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0020

[Correction method] Change

[Correction content]

In the saw blade according to the third aspect of the present invention, the number of trailing teeth is plural, and the height of the trailing teeth is decreased so that the amount of protrusion is increased. When you do, there is almost no Yurei pattern,
A swelling pattern does not occur during cutting and the bending at the time of cutting is small, and more stable cutting is possible. In addition, when the number of subsequent teeth is random, it is not necessary to perform the left and right bending of the subsequent teeth according to a certain rule, and the bending can be performed simultaneously on the left and right in a shorter time than the polishing. The cutting resistance can be reduced by being distributed to each tooth.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0025

[Correction method] Change

[Correction content]

In the saw blade according to claim 4, when the dimension A of the dividing position of the succeeding tooth is T, the thickness is T / 2-0.1 m
m ≦ A ≦ T / 2 + 0.1 mm, the saw blade according to claim 5, the tooth line inclination angles of the left and right teeth of the succeeding teeth are β _L ,
When β _R is set, the trailing teeth having β _L > 0 ° and β _R > 0 ° are included, and when the cutting angle of the trailing tooth is θ in the saw blade according to claim 6, 20 ° ≦ θ ≦ When the cutting angle is 90 °, there is almost no Yurei pattern when the cutting process is performed, a swelling pattern does not occur in the cutting, the bending at the time of cutting is small, and more stable cutting process is possible.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0051

[Correction method] Change

[Correction content]

As a tool or method used for shunting to the left and right by subjecting the tooth center to a dividing bending process, a wedge-shaped tool having a cutting edge R having one cutting angle θ When bending while pressing and splitting.
[FIG. 18- (A)], when performing bending while pressing once with one wedge-shaped tool having a cutting edge R having various cutting angles θ or a wedge-shaped tool spreading in an arc. [Figure 1
8- (B)]

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0052

[Correction method] Change

[Correction content]

In the case where bending is performed by using several kinds of tools having a cutting edge point R or a cutting edge R having one cutting angle θ and dividing the operation several times. [FIG. 18- (C)] First, in the case where T / 2 tooth materials are joined and then spread with a tool having a wedge shape or the like. [FIG. 18- (D)], when a notch is made in the approximately center part of the tooth line in the thickness direction of the tooth tip with a cutting means such as a grindstone or the like is subjected to a cutting process, and then widened by a wedge-shaped tool. [FIG. 18- (E)] and the like are possible.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Name of item to be corrected] 0057

[Correction method] Change

[Correction content]

Further, the dividing depth B (meaning B _L and B _R ) is 0.5 mm ≦ B ≦ 2.0 mm, 1.0
mm is desirable, and when B <0.5 mm, sufficient swing cannot be obtained. When B> 2.0 mm, cracks are likely to occur near the V-groove-shaped apex 5 and the strength of the tooth tends to be insufficient.

[Procedure correction 6]

[Document name to be amended] Statement

[Name of item to be corrected] 0058

[Correction method] Change

[Correction content]

The height difference H from the leading tooth 5 is 0.02 mm ≦
H ≦ 0.5 mm is preferable, but preferably H = 0.15 m
m. If the succeeding tooth before splitting and the preceding tooth have the same height, if the machining is performed under the condition that the height difference of splitting angle θ = 20 ° and amount of protrusion C = 0.1 mm is the most difficult, the succeeding tooth after splitting will be 0.02 mm lower. Also, H> 0.5 mm
In the case of No. 3, the leading tooth has a tooth surface of 0.
Since the cutting is performed while rubbing more than 5 mm, the resistance at the start of cutting is large, the wear progresses quickly, and it is easy to lead to the early life of the saw blade. In addition, thick burrs are generated at the end of cutting, which makes removal difficult.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0062

[Correction method] Change

[Correction content]

The side clearance angle α is preferably 0 ° <α ≦ 20 °. If α> 20 °, cracks are likely to occur at the V-groove apex 5 and the tooth portion strength is likely to be insufficient.

[Procedure Amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0064

[Correction method] Change

[Correction content]

The height difference H from the leading tooth 5 is 0 mm ≦ H ≦
A range of 0.5 mm is desirable, and if H> 0.5 mm,
At the initial stage of inrush cutting of the work material, since the leading tooth performs cutting while rubbing the tooth flank larger than 0.5 mm, the resistance at the start of cutting is large and the progress of wear is likely to be rapid, leading to early life of the saw blade. In addition, thick burrs are generated at the end of cutting, which makes removal difficult. In the case of 0 mm> H, since the inside of the tooth tip of the divided flank tooth is deformed into a curve, the resistance at the time of cutting becomes large and the life of the saw blade becomes early. However, this does not apply when the cutting is performed by a method such as two-step division, three-step division, or hot working.

[Procedure Amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0067

[Correction method] Change

[Correction content]

(Example) With a saw blade having the same pitch tooth profile,
The conventional saw blade (α ′ = 11 shown in FIGS. 12A and 12B)
°, the amount of protrusion 0.4 mm, and the saw blade 1 (H = 0.15 mm, α = 10 °, β = 8) of the present embodiment shown in FIG.
°, θ = 30 °, B = 1.0 mm, C = 0.25 mm)
Using and, the work material S45C, φ250, saw speed 30m
The feed amount (cut amount) was changed at / min to compare the state of the amount of swelling, and continuous cutting was performed at a constant feed amount to compare the bending amount. The results are shown in FIGS. 7 and 8. Here, the feed amount is obtained by the method shown in FIG.

[Procedure Amendment 10]

[Document name to be amended] Statement

[Correction target item name] 0080

[Correction method] Change

[Correction content]

In the invention according to claim 4, when the dimension A of the dividing position in the succeeding tooth is the body thickness T, T / 2−0.1 m
m ≦ A ≦ T / 2 + 0.1 mm, and in the invention according to claim 5, the tooth line inclination angles of the left and right teeth of the succeeding teeth are β _L >.
0 °, β _R > 0 °, and 20 ° ≦ θ ≦ 90, where θ is the split angle of the succeeding tooth in the invention according to claim 6.
When the cutting process is performed, there is almost no Yurei pattern, a swelling pattern does not occur during cutting, the bending at the time of cutting is small, and more stable cutting process is possible.

[Procedure Amendment 11]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

1A is a top view showing an example of an embodiment of a saw blade of the present invention, FIG. 1B is a front view of FIG. 1A, and FIG.
It is a side view along the IC-IC line of FIG.

[Procedure Amendment 12]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

FIG.

[Procedure Amendment 13]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 7

[Correction method] Change

[Correction content]

[Figure 7]

[Procedure Amendment 14]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 12

[Correction method] Change

[Correction content]

[Fig. 12]

[Procedure Amendment 15]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 13

[Correction method] Change

[Correction content]

[Fig. 13]

[Procedure Amendment 16]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 17

[Correction method] Change

[Correction content]

FIG. 17

[Procedure Amendment 17]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 21

[Correction method] Change

[Correction content]

FIG. 21

Claims (6)

[Claims] 1. A saw blade comprising a front tooth which is a straight tooth that is not squeezed out in the left-right direction and a rear tooth which is cut to widen a width of a cutting groove formed by the front tooth. Is equipped with left and right bevel teeth that are bent in the left and right direction with a split in the center of the tooth line in the thickness direction of the tooth tip.
The saw blade characterized in that the distance between the tips of the right and left teeth is smaller than the thickness of the preceding tooth. 2. The thickness of the left and right crest teeth near the tips is
A saw blade according to claim 1, wherein the saw blade has a thickness that is substantially equal to the thickness near each base. 3. The saw blade according to claim 1 or 2, wherein a plurality of the trailing teeth are formed, and the trailing teeth are formed such that the amount of the trailing tooth increases as the height of the trailing teeth decreases. 4. When the dimension A of the dividing position in the succeeding tooth is the body thickness T, T / 2−0.1 mm ≦ A ≦ T / 2
The saw blade according to claim 1, wherein the saw blade has a length of +0.1 mm. 5. When the tooth line inclination angles of the left and right teeth of the trailing teeth are β _L and β _R , the trailing teeth having β _L > 0 ° and β _R > 0 ° are included. The saw blade according to claim 1, 2, 3 or 4. 6. The saw blade according to claim 1, wherein the cutting angle of the succeeding teeth is 20 ° ≦ θ ≦ 90 °, where θ is 90 °.