Bandsaw blade

Abstract

The present application provides a band saw blade, the saw teeth of the band saw blade are arranged repeatedly according to a plurality of saw tooth cycle units, characterized in that: each saw tooth cycle unit comprises 12 saw teeth arranged in sequence; among the 12 saw teeth: the 3n+1th saw tooth is a middle tooth, and between the two adjacent middle teeth, there is a left split tooth and a right split tooth; n=0, 1, …, 3; the tooth height of each middle tooth is greater than the tooth height of any split tooth; the 4th saw tooth is a middle tooth without chamfer on both sides, and chamfers are arranged on both sides of the other middle teeth; on any same height, the tooth width of the 10th saw tooth and the tooth width of the 1st saw tooth are both less than the tooth width of the 7th saw tooth, and the tooth width of the 7th saw tooth is less than the tooth width of the 4th saw tooth; H1>H7>H4; H1, H4, H7, H10 respectively are the tooth heights of the 1st saw tooth, the 4th saw tooth, the 7th saw tooth and the 10th saw tooth; the value of H1-H10 is 2 / d; the value range of d is [0.05mm, 0.15mm]. 10 10 10 ​​​

Description

TECHNICAL FIELD

[0001] The present application relates to a sawing metal cutter, in particular to a split-tooth type band saw blade, especially to the tooth profile design of the band saw blade for cutting workpieces of super-large cross-section, large internal stress and difficult-to-machine materials, especially to the split-tooth type band saw blade for cutting special steels such as high-temperature alloy, precipitated stainless steel and non-magnetic steel. BACKGROUND

[0002] The band saw blade is used for rough machining of titanium and titanium alloy, high-temperature alloy, non-magnetic steel and the like, and the cutting life and cutting efficiency of the hard alloy band saw blade in rough machining are very important. For sawing of difficult-to-cut materials, the sawing is mainly limited by the cutter, and the perpendicularity of the cut workpiece cannot be guaranteed due to rapid wear of the tooth tip.

[0003] From the development of hard alloy products, there are currently two major categories of split-tooth type and non-split-tooth type hard alloy band saw blades. For sawing of difficult-to-cut materials, the split-tooth type hard alloy band saw blade is mainly used. From the tooth profile design, the split-tooth type hard alloy band saw blade mainly has three-chip standard type (for example, model Bichamp CB MP) and multi-chip type (for example, model Bichamp CB Pro), and the multi-chip type has 7-chip type and 11-chip type (for example, model Bichamp CB X925).

[0004] When the three-chip standard type and multi-chip type split-tooth type hard alloy band saw blade is used for sawing of difficult-to-cut materials, the problem of rapid wear of the tooth tip edge often occurs, which affects the sawing life of the band saw blade. Moreover, when the tooth tip edge of the band saw blade is severely worn, the phenomena of cutting skew and core digging (i.e., the perpendicularity or flatness of the cut surface of the sawed workpiece is out of tolerance) easily occur, which affects the sawing effect. SUMMARY

[0005] The present application aims to solve the problem that the tooth tip edge of the existing band saw blade is often rapidly worn when sawing difficult-to-cut materials, which affects the sawing life and effect of the band saw blade, and provides a band saw blade.

[0006] To solve the above technical problems, the technical scheme adopted by the present application is as follows: a band saw blade, the saw teeth of the band saw blade are repeatedly arranged according to a plurality of saw tooth cycle units, each saw tooth cycle unit includes 12 saw teeth arranged in sequence;

[0007] In the 12 saw teeth:

[0008] The 3n+1th saw tooth is a middle tooth, and between the two adjacent middle teeth is one left split tooth and one right split tooth; n=0, 1, …, 3; the tooth height of each middle tooth is greater than the tooth height of any split tooth;

[0009] The 4th saw tooth is a middle tooth without chamfer on both sides, and the other middle teeth are provided with chamfers on both sides;

[0010] The tooth width of the 10th sawtooth and the tooth width of the 1st sawtooth are both less than the tooth width of the 7th sawtooth, and the tooth width of the 7th sawtooth is less than the tooth width of the 4th sawtooth at any same height.

[0011] H1>H 10 H7>H4; H1, H4, H7, H 10 H1, H4, H7, and H10 are the tooth heights of the 1st sawtooth, the 4th sawtooth, the 7th sawtooth, and the 10th sawtooth, respectively. 10 The value of d is in the range of [0.05mm, 0.15mm].

[0012] In the present application, due to the highest tooth height of the 1st sawtooth and the small width of the top, the 1st sawtooth can easily cut into the material to be cut. Since the tooth width of the 10th sawtooth and the tooth width of the 1st sawtooth are both less than the tooth width of the 7th sawtooth, and the tooth width of the 7th sawtooth is less than the tooth width of the 4th sawtooth at any same height, the 1st sawtooth and the 10th sawtooth each form a chip, and the 7th sawtooth and the 4th sawtooth can each form two chips (i.e., split chips), thereby forming more chips than the number of sawteeth, i.e., 6 chips can be formed by 4 middle teeth, so that the cutting force borne by each chip is reduced, and the wear of the sawteeth is reduced. In addition, when the 1st sawtooth is worn to the same height as the top of the 10th sawtooth, the 1st sawtooth and the 10th sawtooth jointly participate in cutting the workpiece, and when the 1st sawtooth is worn more severely, the 10th sawtooth will bear more cutting force. Therefore, the 10th sawtooth as the compensation tooth of the 1st sawtooth increases the cutting depth, enhances the cutting property of the tooth tip edge, reduces the vibration of the band saw blade, and prolongs the anti-wear time of the 1st sawtooth and the cutting life of the entire band saw blade through joint cutting.

[0013] In the above technical solution, the tooth width of the 10th sawtooth is not greater than the tooth width of the 1st sawtooth at any same height. The applicant found that if the tooth width of the 10th sawtooth is greater than the tooth width of the 1st sawtooth at the same height, more split chips can be formed, but since each split chip needs to bear equal or similar cutting force, the split chips need to be uniformly distributed in the width direction, therefore, if the tooth width of the 10th sawtooth is greater than the tooth width of the 1st sawtooth to form more split chips, the width of the top of the 1st sawtooth needs to be very small, which increases the processing difficulty. Considering the processing difficulty, in the present application, the tooth width of the 10th sawtooth is less than the tooth width of the 1st sawtooth at the same height.

[0014] In the above technical solution, the 1st sawtooth and the 10th sawtooth have the same top tooth width and the same chamfer angle. In the present application, the above setting facilitates the processing of the sawteeth.

[0015] In the technical solution, the angles of the chamfers of the middle teeth are the same.

[0016] In the technical solution, the values of H1-H7 and H7-H4 are d.

[0017] In the technical solution, d=0.07mm.

[0018] In the technical solution, among the 12 saw teeth, the 3n+2th saw tooth and the 3n+3th saw tooth have the same tooth height; each left split tooth has a different tooth height, and the split tooth amounts of each split tooth are the same.

[0019] In the technical solution, H8>H 11 >H5>H2; H2, H5, H8, and H 11 are the tooth heights of the 2nd saw tooth, the 5th saw tooth, the 8th saw tooth, and the 11th saw tooth, respectively; the values of H4-H8 are d / 2; and the values of H8-H 11 are d / 2.

[0020] In the technical solution, each left split tooth has a different tooth height, and each right split tooth has a different tooth height, so that each saw tooth cuts in turn, avoiding the rapid wear of the saw teeth caused by the participation of all saw teeth in each cutting.

[0021] In the technical solution, the values of H 11 -H5 and H5-H2 are d.

[0022] In the technical solution, among the 12 saw teeth, the 5th saw tooth and the 6th saw tooth are provided with chamfers on the outer sides.

[0023] In the present application, by the above setting, the cutting property of the 5th sawtooth and the 6th sawtooth is increased.

[0024] In the above technical solution, the rake angle of the sawtooth is in the range of [10°, 20°].

[0025] Generally, the larger the rake angle, the smaller the cutting force on the sawtooth during cutting. However, when sawing difficult materials, too small rake angle will cause fast wear of the tooth tip. By considering the cutting force and tooth tip wear comprehensively, the present application sets the value range of the rake angle to [10°, 20°].

[0026] In the above technical solution, the rake angle of the sawtooth is in the range of [10°, 20°].

[0027] In the present application, since the cutting force in the feed direction is relatively large when sawing difficult materials, in order to protect the tooth tip edge and reduce the wear of the tooth tip edge, the present application sets the value range of the rake angle to [10°, 20°].

[0028] The present application has the advantages and positive effects of:

[0029] (1) The increase in the number of chips can effectively reduce the single-tooth cutting force for difficult-to-cut materials;

[0030] (2) By setting the height difference of the tooth height between the sawteeth, the vibration of the band saw blade during sawing can be reduced, and the single-tooth cutting force can also be reduced;

[0031] (3) By increasing the corresponding compensation teeth (for example, the 10th sawtooth as the compensation tooth of the 1st sawtooth, and the 11th / 12th sawtooth as the compensation tooth of the 8th / 9th sawtooth) for the center teeth (teeth not divided to the left and right), the saw blade can better cut into difficult-to-cut materials, and the center teeth with height difference can alternate cutting, enhancing the tooth tip wear resistance and prolonging the service life of the saw blade;

[0032] (4) The left and right split teeth are designed with a uniform split amount and cut into the workpiece in a certain order, reducing the impact load on the tooth tip and the risk of tooth collapse, tooth pulling, and tooth falling. Through the height difference design of the tooth height, the cutting force on the split teeth is reduced, and through alternate compensation cutting, not only the tooth tip wear resistance is enhanced and the service life of the saw blade is prolonged, but also the risk of clamping the saw due to material internal stress is reduced.

[0033] The present application has been verified to be feasible and effective through on-site trial cutting tests. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments description. Obviously, the drawings in the following description only some of the embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor under the premise of these drawings.

[0035] Figure 1 is a schematic view of the cross section of the tooth type of the band saw blade of the embodiment of the present application;

[0036] Figure 2 (a) is a front view of the band saw blade of the embodiment of the present application;

[0037] Figure 2 (b) is a top view of the band saw blade of the embodiment of the present application. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0039] As shown in Figure 1 , Figure 2 (a), Figure 2 (b), the present application provides a band saw blade, the saw teeth of the band saw blade are arranged repeatedly according to a plurality of saw tooth cycle units, characterized in that: each saw tooth cycle unit includes 12 saw teeth arranged in sequence;

[0040] In the 12 saw teeth:

[0041] The 3n+1 th saw tooth is a middle tooth, and between the two adjacent middle teeth is a left split tooth and a right split tooth; n=0, 1, …, 3; the tooth height of each middle tooth is greater than the tooth height of any split tooth;

[0042] The 4th saw tooth is a middle tooth without chamfer on both sides, and the other middle teeth are provided with chamfers on both sides;

[0043] On any same height, the tooth width of the 10th saw tooth and the tooth width of the 1st saw tooth are both less than the tooth width of the 7th saw tooth, and the tooth width of the 7th saw tooth is less than the tooth width of the 4th saw tooth;

[0044] H1>H 10 >H7>H4; H1, H4, H7, H 10 H1, H4, H7, H10 are the tooth heights of the 1st saw tooth, the 4th saw tooth, the 7th saw tooth and the 10th saw tooth respectively; H1-H 10 The value of d is [0.05mm, 0.15mm].

[0045] The tooth width of the 10th sawtooth at any same height is not greater than the tooth width of the 1st sawtooth. Preferably, the 1st sawtooth and the 10th sawtooth have the same top tooth width and have the same chamfer angle. More preferably, the chamfer angles of the respective middle teeth are the same.

[0046] The values of H1-H7 and H7-H4 are d.

[0047] Among the 12 sawteeth, the 3n+2th sawtooth and the 3n+3th sawtooth have equal tooth heights; each left split tooth has a different tooth height, and the split tooth amounts of each split tooth are equal.

[0048] H8>H 11 >H5>H2; H2, H5, H8, H 11 H2, H5, H8, H11 are the tooth heights of the 2nd sawtooth, the 5th sawtooth, the 8th sawtooth, and the 11th sawtooth, respectively; the values of H4-H8 are d / 2; the values of H8-H 11 are d / 2.

[0049] H 11 The values of H1-H7 and H5-H2 are d.

[0050] Among the 12 sawteeth, the 5th sawtooth and the 6th sawtooth are provided with chamfers on the outside.

[0051] The rake angle of the sawtooth ranges from 10° to 20°. The relief angle of the sawtooth ranges from 10° to 30°. Preferably, the relief angle is 25°.

[0052] The present application is further described in detail below. The present application is directed to tooth profile design of split-tooth hard alloy band saw blade, and proposes an innovative tooth profile design scheme. The present application is mainly directed to sawing of difficult-to-cut materials, and develops a hard alloy band saw blade suitable for sawing such materials. The present application mainly solves the problems of reducing the single-tooth cutting force in the cutting process and reducing the wear rate of the blade edge through cross compensation to prolong the service life of the sawing.

[0053] For difficult-to-cut materials, the split-tooth hard alloy band saw blade is used for the working condition of high sawing efficiency and long service life of the saw blade, and the specific design is as follows Figure 1 , as shown in FIG. 2(a) and FIG. 2(b):

[0054] (1) The tooth profile is 12 teeth per group, and the chip is 14 chips per group. One group is a sawtooth cycle unit.

[0055] (2) The left and right teeth adopt an alternating compensation mode to enhance the wear resistance and prolong the service life of the saw blade.

[0056] (3) A stepped height difference design is adopted to reduce the cutting force (as shown in Figure 2(b)).

[0057] (4) The cutting teeth adopt a wear compensation method (for example, tooth No. 10 is used as a compensation tooth for tooth No. 1) to enhance their cutting performance and wear resistance, and extend the service life of the saw blade;

[0058] In this embodiment, H1 can be set to H. 10 >H7>H4>H8=H9>H 11 =H 12 >H5=H6>H2=H3.

[0059] The cutting edge of the saw teeth can be made of cemented carbide. In this application, tooth height refers to the height of the tooth tip.

[0060] Design of the rake angle α: The rake angle of the saw teeth mainly affects the workpiece's penetration during cutting. Generally, the larger the rake angle, the better the penetration. The size of the rake angle can improve the cutting force; the larger the rake angle, the smaller the cutting force experienced by the saw teeth during cutting. The range of α is generally -5° to 20°. In this embodiment, since the workpiece being cut is a difficult-to-cut material, the wear on the tooth tips must be considered when considering sawing. Therefore, the rake angle α is 10°–20°, preferably 10°.

[0061] Design of the clearance angle β: The clearance angle of the sawtooth mainly affects vibration resistance and cutting force in the feed direction during cutting. Generally, the larger the clearance angle, the worse the vibration resistance and the smaller the cutting force in the feed direction. In addition, the larger the clearance angle, the less friction between the flank face and the workpiece, allowing the cutting fluid to enter better between the tooth tip and the workpiece during sawing, resulting in better heat dissipation, reducing the temperature of the tooth tip, and slowing down the wear of the tooth tip cutting edge. The clearance angle β is generally in the range of 1°-30°. In this embodiment, due to the relatively large cutting force in the feed direction, in order to better protect the tooth tip cutting edge and reduce wear, the clearance angle β is 10°-30°, preferably 25°.

[0062] The shape of the tooth tip is like Figure 1 As shown. The tooth profile design consists of 12 teeth per group. Each group contains 4 center teeth: teeth 1, 4, 7, and 10. Tooth 4 is not chamfered, while the other center teeth have chamfered sides. Each group also contains 8 off-center teeth, which are caused by the tooth mold striking the belt body to the left / right. Among the off-center teeth, teeth 5 and 6 have a chamfer on one side, while teeth 2, 3, 8, 9, 11, and 12 are not chamfered.

[0063] Figure 1, Fig. 2 (a), Fig. 2 (b), reference signs 1, 2, …, 12 represent tooth No. 1 (i.e. the first tooth), tooth No. 2 (i.e. the second tooth), …, tooth No. 12 (i.e. the twelfth tooth) respectively. In the figure, tooth No. 2, tooth No. 3 can be exchanged with each other, tooth No. 5, tooth No. 6 can be exchanged with each other, tooth No. 8, tooth No. 9 can be exchanged with each other, tooth No. 11, tooth No. 12 can be exchanged with each other. Reference signs 1, 4, 7, 10 respectively indicate the tooth top (tooth top) position of the corresponding tooth.

[0064] In the tooth design, the tooth height can be designed with 6 large gradients and 2 small gradients, each large gradient (i.e. d) is 0.07mm, and the small gradient (i.e. d / 2) is 0.035mm. Tooth No. 1 is the highest tooth, tooth No. 2, tooth No. 3 are the lowest tooth, tooth No. 10 is the second highest tooth, tooth No. 7, tooth No. 4 are the third and fourth highest tooth respectively, tooth No. 8, tooth No. 9 are the fifth highest tooth, tooth No. 11, tooth No. 12 are the third from the top tooth, tooth No. 5, tooth No. 6 are the second lowest tooth.

[0065] The tooth height difference between tooth No. 1 and tooth No. 10, the tooth height difference between tooth No. 10 and tooth No. 7, the tooth height difference between tooth No. 4 and tooth No. 8, the tooth height difference between tooth No. 8 and tooth No. 11 are all d / 2. The tooth height difference between tooth No. 7 and tooth No. 4, the tooth height difference between tooth No. 11 and tooth No. 5, the tooth height difference between tooth No. 5 and tooth No. 2 are all d.

[0066] Tooth No. 2, tooth No. 3, tooth No. 8, tooth No. 9, tooth No. 11 and tooth No. 12 all adopt the same tooth amount design. In the process of sawing difficult materials, the material will have corresponding elastic-plastic deformation. Under the action of internal stress, the material will restore the deformation, thereby clamping and pressing the saw blade body, thereby increasing the friction between the blade body and the workpiece. The driving of the blade body is driven by the saw wheel of the sawing machine. The friction between the blade body and the workpiece increases, thereby the blade body slips on the saw wheel, thereby the blade body generates the phenomenon of clamping saw.

[0067] Cutting force calculation: according to the paper "Simulation of the Intermittent Cutting Action of a Bandsaw Blade" published by M. Sarwar, H. Hellbergh, A. R. Doraisingam, M. Persson, the relationship between chip thickness and cutting force in the corresponding sawing process can be established.

[0068] According to the relationship between cutting force and chip thickness, the cutting force of common tooth shape of hard alloy is calculated, and the cutting force of each tooth shape is obtained, as shown in Table 1 below:

[0069]

[0070] As can be seen from the above table, the cutting force of the tooth profile design of the embodiment of the present application is the lowest, and from the overall tooth profile design, not only the cutting force on the tooth is the lowest, but also the anti-wear performance is improved by increasing the middle teeth and the offset teeth (left split teeth and right split teeth).

[0071] The anti-wear principle of the alternate teeth of the present application: As can be seen from FIG. 2(b), along the cutting direction, the No. 1 tooth first contacts the workpiece because it is the highest tooth, so its cutting depth is very large, which is reflected on the chip as a relatively narrow but thick chip; the No. 10 tooth does not participate in cutting before the No. 1 tooth is not seriously worn because its height is lower than that of the No. 1 tooth, when the No. 1 tooth is worn to the same height as the No. 10 tooth, the No. 1 tooth and the No. 10 tooth jointly participate in cutting the workpiece to share the cutting force in the cutting direction, when the No. 1 tooth is seriously worn, the No. 10 tooth will bear more cutting force, therefore, by increasing the No. 10 tooth, the cutting depth of the No. 1 tooth is increased, the cutting-in property of the tooth tip edge is enhanced, and the vibration of the saw band is reduced, at the same time, the No. 10 tooth will jointly participate in cutting with the No. 1 tooth at a certain time period, the cutting force is reduced, the anti-wear time of the No. 1 tooth is prolonged, the cutting of the No. 1 tooth is protected, and finally when the No. 1 tooth is seriously worn, the No. 10 tooth completely bears the cutting main force, the cutting time of the whole band saw is prolonged.

[0072] For the offset teeth of the left and right split teeth, the No. 2 tooth, the No. 3 tooth, the No. 5 tooth, the No. 6 tooth, the No. 8 tooth, the No. 9 tooth, the No. 11 tooth and the No. 12 tooth, along the cutting direction, the No. 8 tooth, the No. 9 tooth, the No. 11 tooth and the No. 12 tooth are respectively two groups of left and right split teeth, first, the height of the No. 8 tooth and the No. 9 tooth is higher than that of the No. 11 tooth and the No. 12 tooth, therefore, in cutting, the No. 8 tooth and the No. 9 tooth first participate in cutting to form a certain sawing width, since a certain feed is accompanied in the sawing process, when the No. 11 tooth and the No. 12 tooth cut, a certain chip and sawing path will also be formed, then the No. 5 tooth and the No. 6 tooth cut, and finally the No. 11 tooth and the No. 12 tooth cut, that is, the No. 2 tooth, the No. 3 tooth, the No. 5 tooth, the No. 6 tooth, the No. 8 tooth, the No. 9 tooth, the No. 11 tooth and the No. 12 tooth cut alternately in a certain order, when the wear of the previous tooth increases and the edge is no longer sharp and cannot cut, the cutting work will be transferred to the next tooth to work, on the one hand, the impact load caused by the too large height difference is reduced to a certain extent, the hard alloy tooth tip is protected from the impact load, and the situations of chipping, pulling and tooth falling are avoided, on the other hand, the service life of the saw blade is also prolonged. In the present application, since the tooth height of the No. 1 tooth and the No. 10 tooth is relatively small, the impact load on the saw tooth can be reduced.

[0073] The band saw blade feeds (i.e. moves downward) simultaneously during the cutting process, and the feed (the depth of downward movement) is generally 0.14mm. Since the height difference between the No. 4 tooth and the No. 1 tooth is not large, when the No. 4 tooth needs to cut after the feed, the No. 4 tooth will also cut the sawed material, and the No. 8 tooth and the No. 9 tooth can also cut the sawed material.

[0074] With the feed of the band saw blade, the No. 1 tooth cuts the middle part first, the No. 4 tooth is responsible for cutting the part outside the left and right side range of the No. 7 tooth which is not cut by the No. 7 tooth, and the No. 7 tooth is responsible for cutting the part outside the left and right side range of the No. 1 tooth which is cut by the No. 1 tooth.

[0075] The present application has been verified to be feasible through on-site trial cutting test.

[0076] It should be noted that each embodiment in the present specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts between each embodiment can be referred to each other.

[0077] The above has described the embodiments of the present application in detail, but the content described is only the preferred embodiments of the present application, and cannot be considered to limit the implementation scope of the present application. Any equivalent changes and improvements made within the scope of the present application should still belong to the scope of the present application. After reading the present application, the person skilled in the art can modify various equivalent forms of the present application, which fall within the scope defined by the appended claims of the present application. In the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

Claims

1.A band saw blade, wherein teeth of the band saw blade are arranged in a plurality of tooth cycle units, characterized in that: each tooth cycle unit comprises 12 teeth arranged in sequence; in the 12 teeth: the 3n+1th tooth is a middle tooth, and between two adjacent middle teeth, there is a left split tooth and a right split tooth; n = 0, 1, …, 3; a tooth height of each middle tooth is greater than a tooth height of any split tooth; the 4th tooth is a middle tooth without chamfer on both sides, and other middle teeth are provided with chamfers on both sides; on any same height, a tooth width of the 10th tooth and a tooth width of the 1st tooth are both less than a tooth width of the 7th tooth, and the tooth width of the 7th tooth is less than a tooth width of the 4th tooth; H1 > H10 > H7 > H4; H1, H4, H7, H10 are tooth heights of the 1st tooth, the 4th tooth, the 7th tooth and the 10th tooth respectively; H1-H10 is equal to d / 2; d is in a range of [0.05mm, 0.15mm]; in the 12 teeth: the 3n+2th tooth and the 3n+3th tooth have equal tooth heights; each left split tooth has a different tooth height, and split tooth amounts of each split tooth are equal; H8 > H11 > H5 > H2; H2, H5, H8, H11 are tooth heights of the 2nd tooth, the 5th tooth, the 8th tooth and the 11th tooth respectively; H4-H8 is equal to d / 2; H8-H11 is equal to d / 2; on any same height, the tooth width of the 10th tooth is not greater than the tooth width of the 1st tooth; the 1st tooth and the 10th tooth have the same top tooth width and the same chamfer angle; values of H1-H7 and H7-H4 are both equal to d. 5.The band saw blade according to claim 1, characterized in that: d = 0.07mm; values of H11-H5 and H5-H2 are both equal to d; in the 12 teeth: the 5th tooth and the 6th tooth are provided with chamfers on the outside; a value of a rake angle of the tooth is in a range of [10°, 20°]; a value of a relief angle of the tooth is in a range of [10°, 30°]; the value of the relief angle is 25°. ​ ​ ​ ​ ​ ​ ​ 2. The band saw blade of claim 1, wherein: ​ 3. The band saw blade of claim 2, wherein: ​ 4. The band saw blade of claim 1, wherein: ​ ​ ​ 6. The band saw blade of claim 1, wherein: ​ 7. The band saw blade according to any one of claims 1-5, characterized in that: ​ 8. The band saw blade according to any one of claims 1-5, characterized in that: ​ 9. The band saw blade according to any one of claims 1-5, characterized in that: ​ 10. The band saw blade of claim 9, wherein: ​

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