Band saw blade and design method thereof

Abstract

The invention discloses a band saw blade and a design method thereof, saw teeth of the band saw blade are divided into a plurality of groups, each group of saw teeth is divided into a high tooth subgroup and a low tooth subgroup, the height of the subgroup is defined by the tooth height of a second high saw tooth in each subgroup, and the height of the high tooth subgroup is larger than that of the low tooth subgroup; the high tooth subgroup and the low tooth subgroup are respectively provided with n sawteeth, and the n sawteeth in the high tooth subgroup and the low tooth subgroup are respectively provided with different tooth heights; the sawteeth of the high-tooth subgroup and the sawteeth of the low-tooth subgroup are alternately arranged in sequence, the first sawtooth row in the high-tooth subgroup is arranged at the foremost, and the sawteeth with the same function in the low-tooth subgroup and the high-tooth subgroup are spaced by n sawteeth; and a stability maintaining plane is ground on the rear cutter surface at the cutting edge of the sawteeth of the high-tooth subgroup. The device can simulate the passivated edge after natural abrasion, effectively weaken the grabbing effect of the cutting edge, reduce the initial impact damage, remarkably improve the initial cutting stability of the saw blade and prolong the overall service life of the saw blade.

Description

Technical Field

[0001] The invention relates to a sawing tool, in particular to a band saw blade and a design method thereof. Background Art

[0002] Band saw blades are widely used for cutting materials such as wood, metal, and stone. With the continuous expansion of material types and increasing processing requirements, higher demands are being placed on the cutting life and stability of band saw blades. Among the many factors influencing saw blade performance, tooth profile design is particularly critical. A well-designed tooth profile not only ensures excellent initial cutting performance but also ensures even wear, smooth chip evacuation, and stable cutting performance over extended use.

[0003] The wear of saw teeth is divided into two stages. The first stage is initial wear. At this time, the tooth tip is very sharp and may have processing errors or burrs. Direct cutting into the workpiece is prone to micro-collapse or cracks due to impact, and the wear width increases rapidly to 0.08-0.15mm; the second stage is the stable wear stage, which is mainly manifested as adhesive wear and abrasive wear. The wear width can reach 0.25-0.45mm, until the saw teeth can no longer effectively penetrate the workpiece or the matrix deforms and fails.

[0004] Most existing band saw blade designs use a single back angle on the back cutting edge. The sharp cutting edge directly cuts into the workpiece without an effective protection mechanism. As a result, when facing difficult-to-cut materials (such as stainless steel, high-temperature alloys, etc.), existing band saw blades have problems such as unstable initial wear, large cutting force fluctuations, and short service life. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that, in view of the shortcomings of existing band saw blades, such as short service life and unstable initial wear, the present invention provides a band saw blade and its design method that can reduce initial impact damage and significantly improve the initial cutting stability and overall service life of the band saw blade.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A band saw blade comprises a steel band and a series of saw teeth fixedly connected to the steel band, wherein the saw teeth are divided into multiple groups and the structural characteristics are:

[0008] Each group of saw teeth is divided into a high-tooth subgroup and a low-tooth subgroup. The height of each subgroup is defined by the tooth height of the second highest saw tooth in the subgroup. The height of the high-tooth subgroup is greater than that of the low-tooth subgroup.

[0009] The high-tooth subgroup and the low-tooth subgroup each have n saw teeth, and the n saw teeth in the high-tooth subgroup and the low-tooth subgroup each have different tooth heights. The tooth heights of the highest saw teeth in the high-tooth subgroup and the low-tooth subgroup are the same, and the tooth heights of the remaining saw teeth are respectively smaller than the tooth height of the highest saw tooth and are distributed with a certain height difference.

[0010] The saw teeth of the high-tooth subgroup and the saw teeth of the low-tooth subgroup are arranged alternately in sequence, and the first saw tooth in the high-tooth subgroup is arranged at the front, and the saw teeth with the same function in the low-tooth subgroup and the high-tooth subgroup are separated by n saw teeth;

[0011] A stabilizing plane with a back angle of 0°-5° is ground on the back surface of the saw teeth at the cutting edge of the high-tooth sub-group, and the width of the stabilizing plane is 0.02mm-0.12mm.

[0012] In the above solution, the edge width L1 of the highest sawtooth in the high tooth group and / or low tooth group is L n / n-2*H1*cotJa, the edge width of the lowest sawtooth L n Equal to the saw road width, the second highest saw tooth edge width L2 = L n *2 / n-2*H1*cotJa, the edge width of the third highest sawtooth L3=L n *3 / n-2*H1*cotJa, and so on, the edge width L of the n-1th high sawtooth n-1 =L n *n-1 / n-2*H1*cotJa, where H1 is the height difference of the teeth within the subgroup, and Ja is the chamfer angle of the teeth.

[0013] In the above solution, a stabilizing plane with a clearance angle of 0°-5° is ground on the back surface of the cutting edge of all the saw teeth in the low tooth group, and the width of the stabilizing plane is 0.02mm-0.12mm.

[0014] In the above scheme, the front angle α of the saw teeth in the high tooth group and the low tooth group is -15°-+15°, and the back angle is 5°-38°. Such an angle design helps to optimize the cutting force distribution and ensure efficient cutting of the saw blade on different materials.

[0015] In the above solution, the thickness of the steel strip is Dh, and Dh<Lc<2*Dh.

[0016] In the above solution, the height difference between the teeth in the high-tooth subgroup and the low-tooth subgroup is 0.03mm-0.15mm; the height difference between the teeth in the high-tooth subgroup and the low-tooth subgroup is 0.02mm-0.25mm.

[0017] In the above solution, the chamfer angle Ja of all the saw teeth in the high tooth group and the low tooth group is 30-60 degrees, preferably 45 degrees. In particular, the chamfer angle of the high tooth group is designed to be 45 degrees, which helps to reduce vibration and noise during the cutting process.

[0018] In the above solution, 3<n<18, and n is an integer.

[0019] Based on the same inventive concept, the present invention also provides a method for designing the band saw blade, which comprises:

[0020] 1) One group of saw teeth consists of two subgroups of saw teeth, namely a high-tooth subgroup and a low-tooth subgroup;

[0021] 2) The cutting edge design of each subgroup of saw teeth is the same, and each subgroup of saw teeth consists of n saw teeth;

[0022] 3) A certain height difference is formed between the sub-group saw teeth;

[0023] 4) Grind a stabilizing plane with a clearance angle of 0°-5° on the back face of the top cutting edge of each saw tooth of the high-tooth group, and the width of the stabilizing plane is 0.02mm-0.12mm;

[0024] The high-tooth sub-group saw teeth and the low-tooth sub-group saw teeth are arranged alternately in sequence. The principle of the staggered arrangement is that the saw teeth of different sub-groups with the same cutting edge design are separated by n teeth.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1) Improve initial cutting stability

[0027] Existing technical problems: The saw teeth in the existing design are very sharp during the initial use stage and are prone to micro-chipping or cracking due to impact, causing the wear width to quickly increase to 0.08-0.15mm, and the initial wear is unstable.

[0028] This invention grinds a stabilizing surface with a clearance angle of 0°-5° and a width of 0.02-0.12mm at the top edge of each tooth in the high-tooth group. This simulates the blunt edge after natural wear, effectively weakening the gripping effect of the cutting edge and reducing initial impact damage. This treatment method ensures that the band saw blade is in a more stable cutting state from the outset, improving the consistency and stability of the initial cutting.

[0029] 2) Extend overall service life

[0030] Problems of existing technology: The band saw blade in the existing technology lacks an effective wear compensation mechanism, and all teeth are directly involved in cutting, resulting in a short overall service life of the saw blade.

[0031] Improvements: This invention utilizes a stepped offset design, with each tooth group consisting of two subgroups: a taller subgroup and a shorter subgroup. The taller subgroup initially performs the primary cutting task, while the shorter subgroup gradually takes over as wear increases, effectively compensating for wear and extending the overall lifespan of the band saw blade. Furthermore, the stabilizing surface on the rear face of the taller subgroup further enhances the teeth's impact resistance and durability, further extending the overall lifespan of the band saw blade. Testing has shown that the band saw blade of this invention, when used to cut 304L stainless steel, can extend its lifespan by 30% compared to conventional products.

[0032] 3) Improve chip removal performance

[0033] Existing technical problems: For difficult-to-cut materials such as stainless steel and high-temperature alloys, the existing saw blade design fails to fully consider how to improve chip removal performance, resulting in chips being difficult to discharge during the cutting process, which can easily cause saw teeth to become clogged or excessively worn.

[0034] Improvements: The stabilizing surface design improves the chip formation angle and flow direction, allowing chips to escape more easily from the tooth grooves and reducing the risk of clogging. This design significantly enhances chip evacuation, ensuring a smooth cutting process, especially when processing long-chip materials.

[0035] 4) The band saw blade of the present invention has high cutting efficiency: by grouping all the saw teeth on the band saw blade, each group of saw teeth is divided into at least two subgroups, and there is a set height difference between the subgroups. The present invention can allow the saw teeth of each subgroup to participate in the cutting in sequence according to their height during cutting, thereby providing higher cutting efficiency for cutting different materials, especially performing well in materials with higher hardness.

[0036] 5) The band saw blade of the present invention has strong durability: the carbide tooth edge design greatly improves the service life and wear resistance of the band saw blade, reducing wear and replacement frequency.

[0037] 6) The band saw blade of the present invention is comfortable to operate: the optimized tooth shape and angle design effectively reduce the vibration and noise during cutting, and improve the comfort and stability of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 Schematic diagram of the structure of a band saw blade according to an embodiment of the present invention.

[0040] Figure 2 This is a schematic diagram of a band saw blade in a cutting state when used for cutting according to an embodiment of the present invention.

[0041] Figure 3 It is a schematic structural diagram of the saw teeth of the band saw blade of the present invention. DETAILED DESCRIPTION

[0042] The present invention will be further described below in conjunction with specific preferred embodiments, but the scope of protection of the present invention is not limited thereby.

[0043] In the description of the present invention, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0045] See also Figure 1 One embodiment of a band saw blade according to the present invention includes a steel strip 1 and a series of teeth 2 fixedly connected to the steel strip 1. The teeth 2 are straight teeth with a tooth width greater than the thickness of the steel strip 1. The teeth 2 on the steel strip 1 are divided into multiple groups, each of which is divided into a high-tooth subgroup and a low-tooth subgroup.

[0046] The height of each subgroup is defined by the height of the second-highest tooth in the subgroup. The height of the high-tooth subgroup is greater than that of the low-tooth subgroup. This allows the high-tooth subgroup and the low-tooth subgroup to participate in the cutting process in sequence, thereby extending the life of the band saw blade.

[0047] Each subgroup of saw teeth has n saw teeth (n is an integer greater than 3 and less than 18), and the n saw teeth in each subgroup of saw teeth have different tooth heights, and the tooth heights of the highest saw teeth in the high-tooth subgroup and the low-tooth subgroup are the same, and the tooth heights of the remaining saw teeth are respectively less than the tooth height of the highest saw tooth and are distributed with a certain height difference; the edge width L1 of the highest saw tooth in each subgroup of saw teeth is L n / n-2*H1*cotJa, the edge width of the lowest sawtooth L nEqual to the saw road width, the second highest saw tooth edge width L2 = L n *2 / n-2*H1*cotJa, the edge width of the third highest sawtooth L3=L n *3 / n-2*H1*cotJa, and so on, the edge width L of the n-1th high sawtooth n-1 =L n *n-1 / n-2*H1*cotJa, where H1 is the height difference of the teeth within the subgroup, and Ja is the chamfer angle of the teeth.

[0048] The saw teeth of the high-tooth subgroup and the saw teeth of the low-tooth subgroup are arranged alternately in sequence, and the first saw tooth in the high-tooth subgroup is arranged at the front, and the saw teeth with the same function in the low-tooth subgroup and the high-tooth subgroup are arranged n saw teeth apart.

[0049] A stabilizing surface with a clearance angle of 0°-5° and a width of 0.02-0.12mm is ground onto the flank surface of the high-tooth sub-group teeth at the cutting edge. This effectively reduces the gripping effect of the sawtooth cutting edge, reduces initial impact damage, and improves the initial cutting stability and service life of the band saw blade. Furthermore, the inventors of this application have discovered through experiments that improperly setting the angle or width of the stabilizing surface (i.e., outside the aforementioned set range) can increase friction at the cutting edge, leading to increased cutting temperatures and affecting the durability and cutting performance of the band saw blade.

[0050] The height difference of each sawtooth within each subgroup can be a fixed value or multiple values ​​forming different height differences. In the present invention, the height difference of the sawtooth within the subgroup is 0.03-0.15mm; the height difference of the sawtooth of adjacent subgroups is 0.02-0.25mm.

[0051] The front angle α of the sawtooth 2 is -15° to +15°, and the back angle is 5° to 38°.

[0052] The thickness of the steel strip 1 is Dh, and Dh<Lc<2*Dh.

[0053] The chamfer angle Ja of the saw teeth 2 is 30-60°.

[0054] The design method of the band saw blade of the present invention includes:

[0055] 1) One group of saw teeth consists of two subgroups of saw teeth, namely a high-tooth subgroup and a low-tooth subgroup;

[0056] 2) The cutting edge design of each subgroup of saw teeth is the same, and each subgroup of saw teeth consists of n saw teeth;

[0057] 3) A certain height difference is formed between the sub-group saw teeth;

[0058] 4) Grind a stabilizing plane with a back angle of 0°-5° on the back face of the top cutting edge of each saw tooth of the high tooth group, and the width of the stabilizing plane is 0.02-0.12mm;

[0059] 5) The high-tooth sub-group saw teeth and the low-tooth sub-group saw teeth are arranged alternately in sequence. The principle of the staggered arrangement is that the number of teeth between saw teeth with the same cutting edge design in different sub-groups is n.

[0060] The structure of the band saw blade of the present invention is described below by taking an example in which eight teeth 2 are provided in each group of teeth 2 on the steel strip 1 and the eight teeth 2 are divided into two subgroups (ie, each subgroup of teeth consists of four teeth 2).

[0061] like Figure 1 、 Figure 2 As shown, eight teeth 2 on a steel strip 1 are distributed along the cutting direction of the saw blade, labeled from front to back in the order A, B, C, D, E, F, G, and H. Teeth A, C, E, and G comprise the high-tooth subgroup, while teeth F, H, B, and D comprise the low-tooth subgroup. Teeth A, C, E, and G are the first, second, third, and fourth teeth in the high-tooth subgroup, respectively, while teeth F, H, B, and D are the first, second, third, and fourth teeth in the low-tooth subgroup, respectively. A stabilizing surface S is ground onto the back face of the top cutting edge of the high-tooth subgroup. This surface has a clearance angle of 0°-5° and a width of 0.02-0.12mm. The tooth height is also reduced by approximately 0.010mm to simulate a blunt edge after natural wear. This treatment helps to weaken the grabbing effect of the cutting edge, reduce initial impact damage, and put the saw blade in a more stable cutting state from the beginning, improving cutting consistency and extending service life.

[0062] Sawtooth A: It is the first sawtooth in the high-tooth sub-group, the highest tooth in the high-tooth sub-group, and the highest sawtooth among all the sawtooths 2 on the steel strip 1. Its top (i.e., the cutting edge) is flat and has two chamfers Ja (the chamfer Ja generally ranges from 30 to 60°, and is 45° in this embodiment). The top width, i.e., the cutting edge width of the highest sawtooth in the high-tooth sub-group, La=Lc / 4-2*H1*cotJa=0.31mm, which is approximately 1 / 4 of the tooth width.

[0063] Sawtooth C: It is the second sawtooth in the high-tooth group, located 0.30mm below sawtooth A, with a flat top (i.e., cutting edge) and no chamfer Ja. The top width, i.e., the cutting edge width Lc of the lowest sawtooth in the high-tooth group, is equal to the tooth width or saw path width = 2.04mm.

[0064] Sawtooth E: It is the third sawtooth in the high-tooth sub-group, located 0.20mm below sawtooth A. The top (i.e., the cutting edge) is flat and has a chamfer Ja. The top width, i.e., the cutting edge width of the third highest sawtooth in the high-tooth sub-group, is Le=Lc*3 / 4-2*H1*cotJa=1.33mm, which is approximately 3 / 4 of the tooth width.

[0065] G sawtooth: It is the fourth sawtooth in the high-tooth sub-group, located 0.10mm below the A sawtooth. The top (i.e., the cutting edge) is flat and has a chamfer Ja. The top width, i.e., the cutting edge width of the second highest sawtooth in the high-tooth sub-group, is Lg=Lc*1 / 2-2*H1*cotJa=0.82mm, which is approximately half of the tooth width.

[0066] F sawtooth: It is the first sawtooth in the low tooth group. The shape of the tooth is consistent with that of A sawtooth, and the tooth height is equal to that of A sawtooth.

[0067] H sawtooth: It is the second sawtooth in the low tooth group. The tooth shape is consistent with that of C sawtooth, and the tooth height is 0.075mm lower than that of C sawtooth.

[0068] Sawtooth B: It is the third sawtooth in the low-tooth group. The tooth shape is consistent with that of sawtooth E, and the tooth height is 0.075mm lower than that of sawtooth E.

[0069] D sawtooth: It is the fourth sawtooth in the low-tooth group. The tooth shape is consistent with that of G sawtooth, and the tooth height is 0.075mm lower than that of G sawtooth.

[0070] In the present invention, the height difference between the teeth in the high-tooth subgroup is designed to be H1, ranging from 0.03 to 0.15 mm; the height difference between the teeth in the low-tooth subgroup is designed to be H2, ranging from 0.03 to 0.15 mm. The height difference H12 between the teeth in the high-tooth subgroup and the teeth in the low-tooth subgroup is generally 0.02 to 0.25 mm. In this embodiment, the height difference between the teeth in the high-tooth subgroup is designed to be H1 = 0.1 mm; the height difference between the teeth in the low-tooth subgroup, excluding the highest teeth, is designed to be H2 = 0.1 mm. The height difference H12 between the teeth in the high-tooth subgroup and the teeth in the low-tooth subgroup is 0.075 mm. This design implements an effective wear compensation mechanism, extending the overall service life of the band saw blade.

[0071] The positions of the high-toothed subgroup saw teeth and the low-toothed subgroup saw teeth are as follows: Figure 1The teeth are arranged alternately as shown. In the low-tooth sub-group, the tooth with the same function and height as tooth A is tooth F, which is 4 teeth away from tooth A. The second-highest tooth is tooth D, which has the same cutting edge as tooth G in the high-tooth sub-group and is 4 teeth away from tooth A: H / A / B / C. Similarly, the third-highest tooth is tooth B, which has the same cutting edge design as tooth E in the high-tooth sub-group and is 4 teeth away from tooth E. The fourth-highest tooth is tooth H, which has the same cutting edge design as tooth C in the high-tooth sub-group and is 4 teeth away from tooth C.

[0072] The cutting edge of each saw tooth 2 on the steel strip 1 is made of cemented carbide or high-speed steel to improve its wear resistance and cutting efficiency.

[0073] like Figure 2 As shown, the height design of the high-tooth sub-group saw teeth and the low-tooth sub-group saw teeth, viewed from the cutting direction of the saw blade, in this embodiment, the tooth height of the first saw tooth in each sub-group of saw teeth is equal and is the highest saw tooth in the group, and the second saw tooth is the lowest tooth, and in each sub-group of saw teeth, the tooth height gradually increases from the second saw tooth, the third saw tooth and the fourth saw tooth along the cutting direction of the saw blade at a rate of 0.1 mm to ensure stability and cutting effect during the cutting process.

[0074] The thickness of the steel strip 1 is Dh. The saw path width is designed to be equal to the edge width Lc of the second tooth (the lowest tooth) in the high-tooth group. Lc>Dh. Generally speaking, Lc<2*Dh.

[0075] The chamfer angle Ja of all the saw teeth 2 on the steel strip 1 is between 30 and 60 degrees, and in this embodiment is 45 degrees. In particular, the chamfer angle of the high tooth group is designed to be 45 degrees, which helps to reduce vibration and noise during the cutting process.

[0076] The clearance angle β of the tooth tip flank is 5 to 38 degrees, preferably 20 degrees. The rake angle α of the tooth tip rake is -15 to 15 degrees, preferably 10 degrees. These rake and clearance angles help optimize cutting force distribution, ensuring efficient cutting of different materials by the band saw blade.

[0077] The tooth pitch adopts fixed pitch or variable pitch design.

[0078] like Figure 3 As shown in the figure, a stabilizing surface S with a clearance angle of 0°-5° is ground on the flank surface of each tooth in the high-tooth group. The width of the stabilizing surface S is 0.02-0.12mm. At the same time, the tooth height is reduced by approximately 0.010mm. This effectively weakens the gripping effect of the cutting edge and reduces initial impact damage, ensuring a more stable cutting state from the outset, improving cutting consistency and extending service life. This process significantly improves the saw blade's cutting stability and chip removal performance, especially for applications with difficult-to-cut materials such as stainless steel and high-temperature alloys.

[0079] When the band saw blade of the present invention is used for cutting, the teeth of the high-tooth subgroup participate in the cutting process first. When the wear of the teeth of the high-tooth subgroup exceeds the height difference between the high-tooth subgroup and the low-tooth subgroup, the teeth of the low-tooth subgroup participate in the cutting process, thereby achieving the purpose of extending the service life of the band saw blade. During this process, because the highest teeth in the high-tooth subgroup and the low-tooth subgroup have the same tooth height, such as teeth A and F in the above-mentioned embodiment, when the cutting process is just beginning, the highest teeth of the teeth in each subgroup can simultaneously participate in the cutting process, sharing the force applied to the highest teeth (tooth A) in the high-tooth subgroup, reducing wear on the highest teeth, and thus extending the service life of the band saw blade.

[0080] Furthermore, during the initial cut, a stabilizing surface S is ground onto the top edge of the high-tooth sub-group teeth. This surface has a relief angle of 0°-5° and a width of 0.02-0.12mm. The tooth height is also reduced by approximately 0.010mm to simulate the blunt edge of natural wear. This treatment helps reduce the gripping effect of the cutting edge and initial impact damage, ensuring a more stable cutting state from the outset, improving cutting consistency and further extending the blade's service life. This process significantly enhances the blade's cutting stability, particularly in applications with difficult-to-cut materials such as stainless steel and high-temperature alloys.

[0081] Experiments have shown that, under the same test cutting equipment and the same test cutting parameters, with the width of the stabilization plane S being 0.03 mm, the cutting area of ​​the product according to the embodiment of the present invention before failure is significantly greater than the cutting area of ​​the existing band saw blade before failure. In other words, the cutting efficiency and life of the product according to the embodiment of the present invention are significantly better than those of the existing band saw blade. For details, please refer to the sawing data comparison in the table below:

[0082]

[0083] To improve the life of the saw teeth in difficult-to-cut materials, the band saw blade of the present invention adopts a stepped staggered design method. This method can be applied to designs with more than two sub-groups of saw teeth. The specific design method of this embodiment is as follows:

[0084] 1) One group of saw teeth consists of two sub-groups of saw teeth: a high-tooth sub-group and a low-tooth sub-group;

[0085] 2) The cutting edge design of each subgroup of saw teeth is the same, and each subgroup consists of 4 saw teeth;

[0086] 3) A certain height difference is formed between the sub-groups of saw teeth. For example, in the above embodiment, the height difference between the first sub-group of saw teeth and the second sub-group of saw teeth is 0.075 mm. The height difference between the sub-groups of saw teeth is generally 0.02-0.25 mm.

[0087] 4) Grind a stabilizing plane with a back angle of 0°-5° on the back face of the top cutting edge of each saw tooth of the high tooth group, and the width of the stabilizing plane is 0.02-0.12mm;

[0088] 5) The high-tooth sub-group saw teeth and the low-tooth sub-group saw teeth are arranged alternately. The principle of the staggered arrangement is that the number of teeth between saw teeth with the same cutting edge design in different sub-groups is n. In this embodiment, the number of teeth between saw teeth with the same cutting edge design in different sub-groups is the number of teeth in the sub-group saw teeth, i.e., n.

[0089] In other embodiments, the sub-group of teeth may also include five teeth or any other number of teeth. The principles are the same and will not be further described. The first tooth in each sub-group of teeth need not necessarily be the highest and the second tooth the lowest. In the present invention, as long as the teeth in each sub-group of teeth, except for the highest tooth, exhibit a certain height difference, for example, the highest tooth can be any tooth in the sub-group, and the lowest tooth can be any tooth in the sub-group. The band saw blade product of the present invention can be either uncoated or coated.

[0090] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make many possible changes and modifications to the technical solution of the present invention using the technical content disclosed above, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent change, and modification made to the above embodiment in accordance with the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the scope of protection of the technical solution of the present invention.

Claims

1. A band saw blade comprising a steel band and a series of saw teeth fixedly connected to the steel band, wherein the saw teeth are divided into multiple groups and characterized in that: Each group of saw teeth is divided into a high-tooth subgroup and a low-tooth subgroup. The height of each subgroup is defined by the tooth height of the second highest saw tooth in the subgroup. The height of the high-tooth subgroup is greater than that of the low-tooth subgroup. The high-tooth subgroup and the low-tooth subgroup each have n saw teeth, and the n saw teeth in the high-tooth subgroup and the low-tooth subgroup each have different tooth heights. The tooth heights of the highest saw teeth in the high-tooth subgroup and the low-tooth subgroup are the same, and the tooth heights of the remaining saw teeth are respectively smaller than the tooth height of the highest saw tooth and are distributed with a certain height difference. The saw teeth of the high-tooth subgroup and the saw teeth of the low-tooth subgroup are arranged alternately in sequence, and the first saw tooth in the high-tooth subgroup is arranged at the front, and the saw teeth with the same function in the low-tooth subgroup and the high-tooth subgroup are separated by n saw teeth; A stabilizing plane with a back angle of 0°-5° is ground on the back surface of the saw teeth at the cutting edge of the high-tooth sub-group, and the width of the stabilizing plane is 0.02mm-0.12mm.

2. The band saw blade according to claim 1, wherein The edge width L1 of the highest saw tooth in the high tooth group and / or low tooth group is L n / n-2*H1*cotJa, the edge width of the lowest sawtooth L n Equal to the saw road width, the second highest saw tooth edge width L2 = L n *2 / n-2*H1*cotJa, the edge width of the third highest sawtooth L3=L n *3 / n-2*H1*cotJa, and so on, the edge width L of the n-1th high sawtooth n-1 =L n *n-1 / n-2*H1*cotJa, where H1 is the height difference of the teeth within the subgroup, and Ja is the chamfer angle of the teeth.

3. The band saw blade according to claim 1, wherein: A stabilizing plane with a back angle of 0°-5° is ground on the back surface of the cutting edge of all the saw teeth in the low tooth subgroup, and the width of the stabilizing plane is 0.02-0.12mm.

4. The band saw blade according to claim 1, wherein: The front angle α of the saw teeth in the high tooth subgroup and the low tooth subgroup is -15° to +15°, and the back angle is 5° to 38°.

5. The band saw blade according to claim 1, wherein: The thickness of the steel strip is Dh, and Dh<Lc<2*Dh.

6. The band saw blade according to claim 1, wherein: The height difference between the saw teeth in the high-tooth subgroup and the low-tooth subgroup is 0.03mm-0.15mm; the height difference between the saw teeth in the high-tooth subgroup and the saw teeth in the low-tooth subgroup is 0.02mm-0.25mm.

7. The band saw blade according to claim 1, wherein: The chamfer angle Ja of all the saw teeth of the high tooth subgroup and the low tooth subgroup is 30°-60°.

8. The band saw blade according to claim 1, wherein 3<n<18, and n is an integer.

9. A method for designing a band saw blade according to any one of claims 1 to 8, comprising: 1) One group of saw teeth consists of two subgroups of saw teeth, namely a high-tooth subgroup and a low-tooth subgroup; 2) The cutting edge design of each subgroup of saw teeth is the same, and each subgroup of saw teeth consists of n saw teeth; 3) A certain height difference is formed between the sub-group saw teeth; 4) Grind a stabilizing plane with a clearance angle of 0°-5° on the back face of the top cutting edge of each saw tooth of the high-tooth group, and the width of the stabilizing plane is 0.02mm-0.12mm; 5) The high-tooth sub-group saw teeth and the low-tooth sub-group saw teeth are arranged alternately in sequence. The principle of the staggered arrangement is that the saw teeth of different sub-groups with the same cutting edge design are separated by n teeth.

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