Band saw blade

Abstract

Each sawtooth circulation unit of the band saw blade comprises 12 sawteeth which are sequentially arranged, in the 12 sawteeth, # 1 teeth, # 4 teeth, # 7 teeth and # 10 teeth are middle teeth, # 2 teeth, # 3 teeth, # 5 teeth, # 6 teeth, # 8 teeth, # 9 teeth, # 11 teeth and # 12 teeth are divided teeth, and a left divided tooth and a right divided tooth are arranged between every two adjacent middle teeth; h1 > H7 > H4 = H10, and H1, H4, H7 and H10 are the tooth heights of the teeth # 1, # 4, # 7 and # 10 respectively; chamfers are arranged on the two sides of the first tooth and the seventh tooth, and chamfers are not arranged on the two sides of the fourth tooth and the tenth tooth. The tooth dividing amounts of the teeth # 2, # 3, # 5, # 6, # 8, # 9, # 11 and # 12 are the same; the twelve sawteeth are designed in an equal altitude difference gradient mode, and the equal altitude difference gradient ranges from 0.03 mm to 0.07 mm.

Description

TECHNICAL FIELD

[0001] The present application relates to sawing metal cutters, in particular to a split-tooth type band saw blade, especially to the tooth profile design of a cemented carbide band saw blade for high temperature alloy high-efficiency sawing, and particularly to a split-tooth type band saw blade for high temperature alloy, non-magnetic steel and precipitation hardening stainless steel industry. BACKGROUND

[0002] The high temperature alloy industry has witnessed a steady increase in market orders from the fields of aviation, aero-engine and aerospace, a substantial growth in civilian product market orders and a breakthrough in international market orders. As a result, the production and sales of high temperature alloy products have increased significantly. The saw blade is used for rough machining in the high temperature alloy industry, and the cutting life and cutting efficiency of the cemented carbide band saw blade in rough machining are particularly important. For sawing of high temperature alloy, the main problem is low machining efficiency, and the problems of core digging and bevel cutting caused by tooth tip wear during sawing, resulting in scrap workpieces.

[0003] From the development of cemented carbide products, there are currently two major categories of split-tooth type and non-split-tooth type cemented carbide band saw blades. For sawing of high temperature alloy, the split-tooth type cemented carbide saw blade is mainly used.

[0004] From the tooth profile design, the split-tooth type cemented carbide saw blade mainly has three-chip standard type and multi-chip type, and the multi-chip type has 7-chip type and 11-chip type. From the perspective of cutting force, the multi-chip type cemented carbide band saw blade has a significantly lower cutting force during sawing than the three-chip standard type, and the more chips, the smaller the cutting force.

[0005] In a certain large high temperature alloy processing enterprise in China, the conventional split-tooth type cemented carbide saw blade is used, and the sawing efficiency is basically 5-7 CM 2 / min, and it takes 80-100 min to process GH4169 with a diameter of 250 mm.

[0006] The three-chip standard type and multi-chip split-tooth type cemented carbide band saw blades cannot simultaneously solve the problems of sawing efficiency and sawing life. The three-chip standard type cemented carbide has coarse and thick chips, and can greatly improve the sawing efficiency at the initial stage of sawing high temperature alloy, but the single-tooth cutting force is large and the wear is very serious, reducing the sawing life. When 7-chip or 11-chip is used, although the single-tooth cutting force is low, the single-tooth wear is small, and the chip is small and thin, but a very high linear speed and feed are required to improve the sawing efficiency, which is not conducive to the universality of the product in sawing bed machining. SUMMARY

[0007] The technical problem to be solved by the present application is that the existing multi-chip type split-tooth type band saw blade cannot simultaneously solve the sawing efficiency and sawing life problem, and the present application provides a band saw blade which can consider the sawing efficiency and sawing life when sawing high-temperature alloy, non-magnetic steel, precipitation hardening stainless steel and other materials.

[0008] To solve the above technical problems, the present application adopts the following technical solutions:

[0009] 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, and the structural characteristics are that:

[0010] The 12 saw teeth are sequentially represented by #1, #2, #3, #4, #5, #6, #7, #8, #9, #10, #11 and #12 teeth in the front-to-back arrangement order, wherein:

[0011] #1, #4, #7 and #10 teeth are middle teeth, #2, #3, #5, #6, #8, #9, #11 and #12 teeth are split teeth, and one left split tooth and one right split tooth are arranged between the two adjacent middle teeth;

[0012] On any same height, the tooth width of the #1 tooth is smaller than the tooth width of the #4, #7 and #10 teeth, and the tooth width of the #7 tooth is smaller than the tooth width of the #4 and #10 teeth;

[0013] H1>H7>H4=H 10 , H1, H4, H7, H 10 are the tooth heights of the #1, #4, #7 and #10 teeth, respectively;

[0014] The two sides of the #1 and #7 teeth are provided with chamfers, the two sides of the #4 and #10 teeth are not provided with chamfers, and the #2, #3, #5, #6, #8, #9, #11 and #12 teeth are not provided with chamfers;

[0015] The split tooth amounts of the #2, #3, #5, #6, #8, #9, #11 and #12 teeth are the same;

[0016] The 12 saw teeth adopt an equal height difference gradient, and the equal height difference gradient is 0.03-0.07 mm.

[0017] In the application, due to the highest tooth height of the #1 tooth and the small width of the top, the #1 tooth serves as the cutting tooth, which is convenient for cutting the material to be sawed. Due to the same height, the tooth width of the #1 tooth is smaller than the tooth width of the #4, #7 and #10 teeth, and the tooth width of the #7 tooth is smaller than the tooth width of the #4 and #10 teeth, so that the present application forms 15 chips (i.e. the chip division) when each saw tooth cycle unit passes through the workpiece, thereby reducing the sawing force borne by each chip and improving the sawing efficiency. In addition, when the #1 tooth is worn to the same height as the top of the #7 tooth, the #1 and #7 teeth jointly participate in cutting the workpiece, and when the #1 tooth is worn more seriously, the #7 tooth will bear more cutting force. The #7 tooth serves as the compensation tooth of the #1 tooth, 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 #1 tooth through the joint cutting of the #7 tooth and the #1 tooth. In addition, the present application adopts the equal height difference gradient design of the 12 saw teeth, so that each saw tooth cuts in turn, avoids the rapid wear of the saw teeth caused by the participation of all saw teeth in each cutting, and further prolongs the cutting life of the entire band saw blade.

[0018] Further preferably, the 12 saw teeth are divided into 5 gradients, and the equal height difference gradient is 0.05 mm. 10 Further preferably, H1>H7>H4=H 11 Further preferably, H5=H6>H8=H9>H 12 Further preferably, H1, H2, H3, H4, H5, H6, H7, H8, H9, H 10 , H 11 , H 12 are the tooth heights of the #1, #2, #3, #4, #5, #6, #7, #8, #9, #10, #11 and #12 teeth respectively. In this way, when the #1 tooth is worn to the same height as the top of the #7 tooth, the #1,

[0019] #7 tooth jointly participates in cutting the workpiece, and when the #1 and #7 teeth are worn more seriously, the #4 and #10 teeth will bear more cutting force. According to this rule, subsequently, the #5, #6, #8, #9, #11, #12, #2 and #3 will bear the cutting force in turn. The teeth participating in cutting subsequently serve as the compensation teeth of the teeth participating in cutting in front, increase the cutting depth, enhance the cutting property of the tooth tip edge, reduce the vibration of the band saw blade, prolong the anti-wear time of the saw teeth participating in cutting in front, and prolong the cutting life of the entire band saw blade.

[0020] Further preferably, the thickness of the chip generated by the #1 tooth is the thickest; the thickness of the chip generated by the #4, #7 and #10 teeth is smaller than that of the #1 tooth, and the width is consistent with that of the #1 tooth; the chip generated by the #2, #3, #5, #6, #8, #9, #11 and #12 is the most slender and filamentous.

[0021] Further preferably, the 12 saw teeth generate 15 cuttings after passing through the workpiece.

[0022] Further preferably, the rake angle of the saw teeth ranges from 5° to 15°, so as to reduce the wear and cold welding of the saw teeth while ensuring a large cutting force.

[0023] Further preferably, the rake angle of the saw teeth is 10°.

[0024] Further preferably, the relief angle of the saw teeth ranges from 10° to 30°, so as to meet the requirement of high-efficiency sawing and provide a large cutting force in the feeding direction, thereby improving the sawing efficiency.

[0025] Further preferably, the relief angle of the saw teeth is 25°.

[0026] Compared with the prior art, the present application has the following advantages:

[0027] 1) The tooth shape design of the split-tooth hard alloy band saw blade of the present application adopts a multi-cutting split-tooth design, which can reduce the single-tooth cutting force, reduce the blade edge wear rate, and prolong the service life of the band saw blade.

[0028] 2) Each group of saw teeth in the band saw blade of the present application adopts an equal-height difference gradient design, and the middle teeth and split teeth are arranged alternately. In this way, by using the method of split teeth sharing the wear amount of middle teeth, the wear rate of middle teeth is reduced, the wear degree of middle teeth is delayed, the saw blade vibration is reduced, and the sawing life is prolonged.

[0029] 3) The saw teeth of the band saw blade of the present application adopt a large relief angle design, which improves the cutting force in the feeding direction, thereby improving the sawing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0031] Figure 1 FIG. 1 is a schematic view of the cross section of the tooth shape of the band saw blade of the present application;

[0032] Figure 2 FIG. 2 is a schematic view of the cuttings generated when the band saw blade of the present application is used;

[0033] Figure 3 FIG. 3 is a front view of the structure of the band saw blade of the present application.

[0034] Figure 4 A top view of the band saw blade of the embodiment of the present application;

[0035] Figure 5 A schematic diagram of the gullet amount of the band saw blade of the embodiment of the present application.

[0036] Figure 6 The band saw blade sawing test results of the present application.

[0037] Figure 7 The band saw blade sawing test results of the conventional band saw blade. DETAILED DESCRIPTION

[0038] The present application will be further described below in conjunction with specific preferred embodiments, but the protection scope of the present application is not limited by this.

[0039] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] Please refer to Figure 1 - Figure 5 In an embodiment of the present application, 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, and the structural features are as follows:

[0042] The 12 saw teeth include 4 middle teeth and 8 gullets;

[0043] The 12 saw teeth are sequentially represented by #1, #2, #3, #4, #5, #6, #7, #8, #9, #10, #11, #12 teeth in the order of front to back arrangement, wherein:

[0044] #1, #4, #7, #10 teeth are middle teeth, #2, #3, #5, #6, #8, #9, #11, #12 teeth are split teeth, and one left split tooth and one right split tooth are arranged between two adjacent middle teeth;

[0045] At any same height, the tooth width of the #1 tooth is smaller than the tooth width of the #4, #7, #10 teeth, and the tooth width of the #7 tooth is smaller than the tooth width of the #4, #10 teeth;

[0046] H1>H7>H4=H 10 , H1, H4, H7, H 10 are tooth heights of the #1, #4, #7, #10 teeth, respectively;

[0047] The #1, #7 teeth are provided with chamfers on two sides, the #4, #10 teeth are not provided with chamfers on two sides, and the #2, #3, #5, #6, #8, #9, #11, #12 teeth are not provided with chamfers;

[0048] The split tooth amounts of the #2, #3, #5, #6, #8, #9, #11, #12 teeth are the same;

[0049] The 12 saw teeth adopt an equal height difference gradient, and the equal height difference gradient is 0.03-0.07 mm.

[0050] In the embodiment, the 12 saw teeth are divided into 5 gradients, and specifically, H1>H7>H4=H 10 >H5=H6>H8=H9>H 11 =H 12 =H2=H3, H1, H2, H3, H4, H5, H6, H7, H8, H9, H 10 , H 11 , H 12 are tooth heights of the #1, #2, #3, #4, #5, #6, #7, #8, #9, #10, #11, #12 teeth, respectively. In the embodiment, the equal height difference gradient is preferably 0.05 mm.

[0051] The thickness of the chip generated by the #1 tooth is the thickest; the thickness of the chip generated by the #4, #7, #10 teeth is less than that of the #1 tooth, and the width is consistent with that of the #1 tooth; the chip generated by the #2, #3, #5, #6, #8, #9, #11, #12 is the most slender and in a silk shape.

[0052] The rake angle of the saw tooth is in the range of [5°, 15°] to minimize the wear and cold welding of the saw tooth while ensuring a larger cutting force. The preferred value of the rake angle of the saw tooth is 10°.

[0053] The rake angle of the saw tooth ranges from 10 to 30 degrees to meet the requirement of high-efficiency sawing, provide a large cutting force in the feeding direction, and further improve the sawing efficiency. The preferred value of the rake angle of the saw tooth is 25 degrees.

[0054] The application is further described in detail below.

[0055] The application mainly solves the problem that the sawing efficiency and the sawing life cannot be considered when sawing high-temperature alloy, non-magnetic steel, and precipitation-hardened stainless steel. The application improves the sawing efficiency and the sawing life by designing the tooth shape of the band saw blade, increasing the idea of compensating for the wear of the middle tooth and the wear of the eccentric tooth.

[0056] For the workpieces of difficult-to-cut materials such as high-temperature alloy, non-magnetic steel, and precipitation-hardened stainless steel, the application adopts a split-tooth hard alloy band saw blade, and the specific design is as shown in Figure 1 Figure 5

[0057] 1. The tooth shape is 12 teeth per group (see Figure 1 );

[0058] 2. The chip is 15 chips per group (see Figure 2 );

[0059] 3. The equal tooth amount design maintains the smoothness of the cutting surface and prevents cutting skew and core digging (see Figure 5 , wherein W1 represents the tooth amount);

[0060] 4. The step height difference design reduces the cutting force (see Figure 3 ). In the embodiment, H1>H7>H4=H 10 >H5=H6>H8=H9>H 11 =H 12 =H2=H3.

[0061] The cutting edge of the saw tooth can adopt hard alloy. In the application, the tooth height refers to the tooth tip height of the saw tooth.

[0062] ​​Rake angle of saw tooth α: The rake angle in the cutting process mainly affects the cutting property of the workpiece. Generally, the larger the rake angle, the better the cutting property. The size of the rake angle can improve the cutting force. The larger the rake angle, the smaller the cutting force in the cutting process of the saw tooth. The range of the rake angle α is generally -5°-20°. In the present embodiment, since the sawing workpiece is a difficult-to-cut material of high-temperature alloy, the high-temperature alloy has the characteristics of large internal stress, low thermal conductivity and strong work hardening capacity, and therefore the wear of the tooth tip must be considered when sawing. In addition, when high-temperature alloy is efficiently sawed, if the rake angle of the tooth tip is too large, combined with the large roughness of the rake face of the saw tooth, the cuttings peeled off are very easy to accumulate on the rake face to form a cold welding phenomenon at the tooth tip edge. Due to the cold hardening of the cuttings, the edge is very easy to be accumulated to make the edge not participate in cutting, thereby causing more and more cuttings to be accumulated to cause the problem of clamping the saw. The present application needs to consider the wear and cold welding of the saw tooth in addition to the cutting force, and therefore the rake angle α is 5°-15°, and is preferably 10°.

[0063] Rake angle of saw tooth α: The rake angle in the cutting process mainly affects the cutting property of the workpiece. Generally, the larger the rake angle, the better the cutting property. The size of the rake angle can improve the cutting force. The larger the rake angle, the smaller the cutting force in the cutting process of the saw tooth. The range of the rake angle α is generally -5°-20°. In the present embodiment, since the sawing workpiece is a difficult-to-cut material of high-temperature alloy, the high-temperature alloy has the characteristics of large internal stress, low thermal conductivity and strong work hardening capacity, and therefore the wear of the tooth tip must be considered when sawing. In addition, when high-temperature alloy is efficiently sawed, if the rake angle of the tooth tip is too large, combined with the large roughness of the rake face of the saw tooth, the cuttings peeled off are very easy to accumulate on the rake face to form a cold welding phenomenon at the tooth tip edge. Due to the cold hardening of the cuttings, the edge is very easy to be accumulated to make the edge not participate in cutting, thereby causing more and more cuttings to be accumulated to cause the problem of clamping the saw. The present application needs to consider the wear and cold welding of the saw tooth in addition to the cutting force, and therefore the rake angle α is 5°-15°, and is preferably 10°.

[0064] Figure 1 - Figure 5 In the drawings, reference numerals 1, 2, …, 12 represent #1 tooth (i.e. the first saw tooth), #2 tooth (i.e. the second saw tooth), …, #12 tooth (i.e. the twelfth saw tooth), respectively.

[0065] The shape of the tooth tip is shown in FIG. 2. Figure 1 The tooth shape design is composed of 12 teeth per group. Each group of saw teeth contains 4 middle teeth, i.e. #1, #4, #7 and #10 teeth. The two sides of #1 and #7 teeth are chamfered, and the two sides of #4 and #10 teeth are not chamfered. Each group of teeth contains 8 sub-teeth, i.e. #2, #3, #5, #6, #8, #9, #11 and #12 teeth, and the sub-teeth are designed without chamfering.

[0066] In the tooth shape design, as shown in FIG. 3, Figure 3As shown, the height difference gradient is designed to reduce the cutting force. The height difference gradient adopts 5 gradients, each height difference gradient is 0.03-0.07mm, and in the embodiment, 0.05mm is preferred. The #1 tooth is the highest tooth, the #2, #3, #11 and #12 teeth are the lowest; the #7 tooth is the second highest tooth; the #4 and #10 teeth are the third highest tooth; the #5 and #6 teeth are the fourth highest tooth; and the #8 and #9 teeth are the second lowest tooth.

[0067] Among the #2, #3, #5, #6, #8, #9, #11 and #12 teeth, the same tooth division amount is adopted (see Figure 4 W1 in the middle), and the purpose is to make the offset tooth generate corresponding centering force, so as to prevent cutting skew in the high-efficiency sawing process.

[0068] The cutting chips generated by the #1-#12 teeth are shown in Figure 2 Among them, the cutting chip generated by the #1 tooth is the thickest; the cutting chip generated by the #4, #7 and #10 teeth is thinner than that of the #1 tooth, and the width is consistent with that of the #1 tooth; the cutting chip generated by the #2, #3, #5, #6, #8, #9, #11 and #12 is the most slender and filamentous.

[0069] When the band saw blade is used:

[0070] 1. The tooth type product is 12 teeth per group, and in the cutting process, 15 cutting chips are generated after each group of teeth passes through the workpiece, and the more cutting chips produced in cutting a certain volume of material, the smaller each cutting skew, and thus the smaller the cutting force on each tooth;

[0071] 2, 12 teeth per cycle, #1 tooth chamfer on both sides, for cutting tooth, also in the height direction of the highest tooth, so #1 tooth is the first tooth with the workpiece material contact; #2, #3 tooth for following #1 tooth into the workpiece, because in this group of teeth, #2, #3 and #1 tooth height difference is the largest, and the distance is relatively close, therefore in this group of teeth do not participate in cutting; Because #4 tooth and #1 tooth height difference is small, therefore #4 tooth as a tooth cutting; #5, #6 tooth and #1 tooth height difference compared to #4 tooth and #1 tooth height difference is still small, so as the main tooth cutting tooth in the early stage, its wear is also the largest, but because #5, #6 tooth is not chamfered, so its full edge cutting, to a certain extent, can share the cutting pressure of #1 tooth, on the other hand, the full edge cutting can reduce the risk of chipping; #7 tooth, because the front #5, #6 tooth share the cutting amount, so #7 tooth as a tooth its wear is small, but it also as a tooth participate in the main cutting, so its wear is only second to #5, #6 tooth; #8, #9 tooth because the height difference is large, so its wear is greater than #2, #3 tooth; #10 tooth as a tooth, its height difference is small, so the tooth is also as a tooth cutting main force; #11, #12 tooth because the distance #1 tooth is far, under certain linear velocity and feed, its height difference is large advantage is not obvious, also will participate in cutting, wear than #2, #3 tooth serious; #2, #3, #5, #6, #8, #9, #11, #12 as a tooth, will form a certain saw width, from the wear degree, #5, #6 is the most serious, #2, #3 tooth is the most slight.

[0072] As Figure 6 shown, the invention band saw blade product is installed on Amada DYNA SAW430 sawing machine, mainly processing difficult to cut material brand R41, 718, WASP, 625, 783 and nickel-based alloy material (sawing difficulty R41>718>WASP>625>783), sawing parameters are divided into grinding stage and normal use stage two different cutting parameters, the initial linear velocity is 25.8-26.2 m / min during the grinding period, the sawing efficiency is 5.5 CM 2 / min, the normal linear velocity is 32 m / min after the grinding is finished, and the sawing efficiency reaches 9.3 CM 2 / min. However, as Figure 7 shown, generally, the linear velocity used for sawing nickel-based alloy material is generally 25-35 m / min, and the sawing efficiency is 6-7 CM 2 / min. Therefore, it can be known that the invention band saw blade product can improve the sawing efficiency and the sawing life.

[0073] The above merely describes specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can make many possible changes and modifications to the technical solutions of the present application, or modify equivalent embodiments with equivalent changes, without departing from the scope of the technical solutions of the present application, by using the technical contents disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, without departing from the content of the technical solutions of the present application, shall fall within the protection scope of the technical solutions of the present application.

Claims

1. A band saw blade, the saw teeth of the band saw blade are arranged repeatedly according to a plurality of saw tooth cycle units, each saw tooth cycle unit comprises 12 saw teeth arranged in sequence, characterized in that: the 12 saw teeth are denoted by #1, #2, #3, #4, #5, #6, #7, #8, #9, #10, #11, #12 teeth in sequence from front to back, wherein: the #1, #4, #7, #10 teeth are middle teeth, the #2, #3, #5, #6, #8, #9, #11, #12 teeth are split teeth, and one left split tooth and one right split tooth are arranged between any two adjacent middle teeth; at any same height, the tooth width of the #1 tooth is smaller than the tooth width of the #4, #7, #10 teeth, and the tooth width of the #7 tooth is smaller than the tooth width of the #4, #10 teeth; H1 > H7 > H4 = H 10 H1, H4, H7, H 10 H1, H4, H7, H chamfers are arranged on both sides of the #1, #7 teeth, no chamfer is arranged on both sides of the #4, #10 teeth, and no chamfer is arranged on both sides of the #2, #3, #5, #6, #8, #9, #11, #12 teeth; the split tooth amount of the #2, #3, #5, #6, #8, #9, #11, #12 teeth is the same; the 12 saw teeth are designed by using an equal height difference gradient, and the equal height difference gradient is 0.03-0.07 mm.

2. The band saw blade of claim 1, wherein: the 12 saw teeth are divided into five gradients, and the equal height difference gradient is 0.05 mm.

3. The band saw blade of claim 1, wherein: H 10 >H5 = H6 > H8 = H9 > H 11 = H 12 = H2 = H3, H2, H3, H5, H6, H8, H9, H 11 , H 12 are the tooth heights of teeth #2, #3, #5, #6, #8, #9, #11, #12, respectively.

4. The band saw blade of claim 1, wherein: the chip thickness generated by the #1 tooth is the thickest; the chip thickness generated by the #4, #7, #10 teeth is smaller than that of the #1 tooth, and the width is the same as that of the #1 tooth; the chip generated by the #2, #3, #5, #6, #8, #9, #11, #12 is the most slender and in a silk shape.

5. The band saw blade of claim 1, wherein: the 12 saw teeth generate 15 chips after passing through a workpiece.

6. The band saw blade according to any one of claims 1-5, characterized in that: the rake angle of the saw tooth is in the range of [5°, 15°].

7. The band saw blade of claim 6, wherein: the rake angle of the saw tooth is 10°.

8. The band saw blade according to any one of claims 1-5, characterized in that: the relief angle of the saw tooth is in the range of [10°, 30°].

9. The band saw blade of claim 8, wherein: the relief angle of the saw tooth is 25°.

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