Saw blade with staggered sawteeth, saw blade production process and equipment

Abstract

The invention provides a sawtooth staggered type saw blade and a saw blade production process and equipment, and relates to the technical field of composite material cutting machining.The sawtooth staggered type saw blade comprises a circular saw body, and a plurality of first sawtooth parts and a plurality of second sawtooth parts are arranged on the periphery of the circular saw body in the circumferential direction in a staggered mode; the first sawtooth parts and the second sawtooth parts are equal in number, are sequentially arranged at intervals, and are arranged in a staggered manner, so that a staggered cutting structure is formed between adjacent different types of sawteeth. The structure is beneficial to dispersing cutting force, reducing load of a single saw tooth, improving stability and durability of the saw blade and facilitating breakage and discharge of cuttings, so that cutting efficiency and machining quality are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of cutting processing of composite materials, and particularly relates to a saw blade with staggered saw teeth, a saw blade production process and equipment. Background Art

[0002] At present, in the processing of composite materials, the saw blade milling cutter is widely used as an efficient cutting tool. Its typical structure is the form of teeth arranged circumferentially on a disc-shaped cutter body, which is suitable for realizing grooving, cutting and blanking operations on carbon fiber, glass fiber reinforced composite materials, etc. However, different from metal materials, composite materials are composed of fiber reinforcements and resin matrices, and have the characteristics of strong anisotropy, poor thermal stability and fragile delamination. This makes it extremely easy to occur surface defects such as burrs, delamination and fiber pulling out during the cutting process, especially when the tool design is improper or the cutting edge control is insufficient.

[0003] Existing saw blade milling cutters mostly adopt a continuous tooth shape structure. Although a certain cutting efficiency can be achieved at high speeds, due to the lack of effective chip breaking or chip control structures between the teeth, the chips form long strip continuous fibers during the discharge process. This not only easily causes the chips to entangle the tool or block the chip discharge path, but also the chips further pull the surface fibers of the workpiece during the dragging process, ultimately resulting in obvious burrs or chipping phenomena at the workpiece cut, seriously affecting the surface finish and edge integrity of the composite material products. Especially in high-end manufacturing fields such as aerospace and rail transit with high requirements for appearance quality, poor surface quality will directly affect the service performance and structural reliability of the products. Summary of the Invention

[0004] This application discloses a saw blade with staggered saw teeth, a saw blade production process and equipment to solve the technical problem that burrs are likely to occur in the finished product in the related art.

[0005] In a first aspect, this application provides a saw blade with staggered saw teeth, adopting the following technical solution: A serrated saw blade, comprising: a circular saw body; a first serration group, provided with multiple groups on the outer peripheral wall surface of the circular saw body; a second serration group, also provided with multiple groups on the outer peripheral wall surface of the circular saw body, and the first serration group and the second serration group are arranged alternately in the circumferential direction of the circular saw body; wherein, the first serration group is composed of multiple first serration parts arranged in sequence on the outer periphery of the circular saw body, the second serration group is composed of multiple second serration parts arranged in sequence on the outer periphery of the circular saw body, and both the first serration part and the second serration part are configured as inclined saw teeth and are symmetrically inclined to the left and right; chip-breaking parts, multiple chip-breaking parts are arranged in a circular pattern on the side surface of the circular saw body, and multiple chip-breaking parts located on the same radial line of the circular saw body form a chip-breaking groove; a guiding part, arranged between two adjacent first serration parts and second serration parts, for automatically guiding the chips from the end face to the chip-breaking groove on the side surface during the rotation of the circular saw body.

[0006] Preferably, when two adjacent first serration parts and second serration parts are inclined and close to each other from bottom to top, a triangular area is formed on the circular saw body and between the two adjacent first serration parts and second serration parts, and the guiding part is arranged in the triangular area; the guiding part has a first guiding surface and a second guiding surface facing away from each other, the inclination direction of the first guiding surface is the same as that of the first serration part, and the inclination direction of the second guiding surface is the same as that of the second serration part; a first guiding groove is formed between the first guiding surface and the first serration part, and the first guiding groove is communicated with one of the chip-breaking grooves located on the lower surface of the circular saw body; a second guiding groove is formed between the second guiding surface and the second serration part, and the second guiding groove is communicated with another adjacent chip-breaking groove located on the lower surface of the circular saw body.

[0007] Preferably, a first avoiding surface is formed after the part of the adjacent first serration part near its upper end is cut, and the first avoiding surface is used to avoid the adjacent second serration part; a second avoiding surface is formed after the upper end part of the adjacent second serration part is cut, and the second avoiding surface is used to avoid the adjacent first serration part.

[0008] Preferably, a collecting groove is arranged on the circular saw body and between the first avoiding surface and the second avoiding surface, the collecting groove is communicated with one of the chip-breaking grooves on the upper surface of the circular saw body, one side edge of the first avoiding surface is configured as one side groove edge of the collecting groove, and one side edge of the second avoiding surface is configured as the other side groove edge of the collecting groove; from the direction away from the collecting groove to the direction close to the collecting groove, the first avoiding surface is recessed inward and then extends outward to the collecting groove; and / or, from the direction away from the collecting groove to the direction close to the collecting groove, the second avoiding surface is recessed inward and then extends outward to the collecting groove.

[0009] Preferably, when the adjacent first serrated portion and the second serrated portion are inclined and approach each other from top to bottom, a third relief surface is formed by cutting a portion of the adjacent first serrated portion near its lower end, and the third relief surface is used to avoid the adjacent second serrated portion. A fourth relief surface is formed after cutting a portion of the adjacent second serrated portion near its lower end, and the fourth relief surface is used to avoid the adjacent first serrated portion. The guiding portion is disposed between the third relief surface and the fourth relief surface.

[0010] Preferably, the guiding portion has a third guiding surface and a fourth guiding surface facing away from each other. The inclination direction of the third guiding surface is the same as that of the second serrated portion, and the inclination direction of the fourth guiding surface is the same as that of the first serrated portion. A third guiding groove is formed between the third guiding surface and the third relief surface, and the third guiding groove communicates with one of the chip-breaking grooves located on the lower surface of the circular saw body. A fourth guiding groove is formed between the fourth guiding surface and the fourth relief surface, and the fourth guiding groove communicates with the other chip-breaking groove located on the lower surface of the circular saw body.

[0011] Preferably, the upper ends of the third guiding groove and the fourth guiding groove intersect and communicate obliquely, and the obliquely communicating portion of the third guiding groove and the fourth guiding groove is configured as a gathering portion. A fifth guiding groove is provided between the adjacent first serrated portion and the second serrated portion and above the guiding portion. The first end of the fifth guiding groove communicates with one of the chip-breaking grooves located on the upper surface of the circular saw body, and the second end of the fifth guiding groove communicates with the gathering portion, so that the third guiding groove, the fourth guiding groove, and the fifth guiding groove form a "person" character shape.

[0012] Preferably, the cross-sectional shape of the third guiding groove is configured to be a gradually shrinking "V" shape from a position far from the gathering portion to a position close to the gathering portion; and / or, the adjacent second serrated portion and the outer peripheral wall surface of the circular saw body together form an arc guiding surface, and one side edge of the arc guiding surface is configured as one side groove edge of the fifth guiding groove. The arc guiding surface is configured to be first concave and then extend outward from a direction far from the fifth guiding groove to a direction close to the fifth guiding groove.

[0013] In a second aspect, the present application provides a saw blade production process, adopting the following technical solution: A saw blade production process for manufacturing the serration-interleaved saw blade of the first aspect, comprising the following steps: Cut the plate to obtain a circular saw body, cut a plurality of first serrated groups and second serrated groups that are sequentially staggered in a circumferential direction on the outer periphery of the circular saw body, and cut a plurality of chip-breaking portions on the upper and lower side surfaces of the circular saw body to form chip-breaking grooves; After shot peening or sandblasting the circular saw body, detect the stress of the circular saw body, and control the particle size and speed of shot peening or sandblasting according to the detection results, so that the stress of the circular saw body meets the requirement of ≤0.2 mm; Coat the surface of the circular saw body with a titanium metal coating.

[0014] In a third aspect, the present application also provides a device with a serrated staggered saw blade, including the serrated staggered saw blade of the first aspect, which can be used to cut composite material parts.

[0015] The present invention has the following advantages and beneficial effects: By forming a staggered relationship between the first serrated part and the second serrated part in terms of inclination angle, arrangement direction, etc., the dispersion of cutting force can be achieved during the cutting process, which is beneficial to reducing the load borne by a single serration, reducing the serration wear rate, and thus extending the service life of the saw blade. Secondly, the serrated combination arranged in a staggered manner can achieve a more continuous and stable cutting path during the cutting process, which is beneficial to reducing cutting vibration and jumping and improving the cutting surface quality. Thirdly, this staggered structure also has a positive effect on chip breaking and chip evacuation. The chips generated by different serrations can be discharged with staggered peaks, reducing the probability of chip clogging and helping to improve the processing efficiency. Overall, through the improvement of the serration structure, the present application realizes an optimized balance among cutting efficiency, service life, and processing quality, and has strong practicality and popularization value. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 is a schematic structural diagram of the serrated staggered saw blade of the embodiment of the present application; Figure 2 is Figure 1 an enlarged view of part A in Figure 3 is Figure 1 an enlarged view of part B in

[0018] The labels in the figure are: 1. Circular saw body; 11. Triangular area; 12. First guiding groove; 13. Second guiding groove; 14. Converging groove; 15. Third guiding groove; 16. Fourth guiding groove; 17. Fifth guiding groove; 18. Arc guiding surface; 2. First saw tooth group; 21. First saw tooth part; 211. First avoiding surface; 212. Third avoiding surface; 3. Second saw tooth group; 31. Second saw tooth part; 311. Second avoiding surface; 312. Fourth avoiding surface; 4. Chip breaking part; 41. Chip breaking groove; 5. Guiding part; 51. First guiding surface; 52. Second guiding surface; 53. Third guiding surface; 54. Fourth guiding surface; 6. Converging part. Detailed implementation mode

[0019] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0020] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means an "or" relationship between the associated objects before and after.

[0021] In a first aspect, some embodiments of the present application provide a saw blade with staggered saw teeth. Please refer to Figure 1 、 Figure 2 and Figure 3, the serrated saw blade includes a circular saw body 1. On the outer peripheral wall surface of the circular saw body 1, multiple groups of first serration groups 2 and second serration groups 3 are provided, and the first serration groups 2 and the second serration groups 3 are arranged alternately in the circumferential direction of the circular saw body 1. The first serration group 2 is composed of multiple first serration parts 21 arranged in sequence on the outer periphery of the circular saw body 1, and the second serration group 3 is composed of multiple second serration parts 31 arranged in sequence on the outer periphery of the circular saw body 1. Each first serration part 21 and second serration part 31 is set as an inclined serration, and they are symmetrically inclined to the left and right relatively. This alternating arrangement between the first serration group 2 and the second serration group 3 can make the cutting force evenly distributed in the circumferential direction during the process of the saw blade rotating and cutting the composite material, which helps to reduce the edge cracking or delamination phenomenon of the composite material caused by the concentrated force on one side of the serrations to a certain extent. In particular, the inclined design of the serrations forms a shear rather than a splitting mode when cutting into the fiber layer by adjusting the cutting angle and the contact angle, thereby reducing the tearing and pulling out of the fibers to a certain extent and being beneficial to improving the smoothness of the cutting surface of the composite material.

[0022] Furthermore, a plurality of chip-breaking parts 4 are arranged in the circumferential direction on the side surface of the circular saw body 1, and a plurality of chip-breaking parts 4 located on the same radial line of the circular saw body 1 are combined to form a chip-breaking groove 41. The above chip-breaking groove 41 is not protruding from the outer contour of the circular saw body 1, but is arranged on the side surface in an embedded or recessed form. Its purpose is to form a guiding and disturbing area in the path where the chips are generated from the main cutting surface of the serrations and flow along the land during the cutting process of the saw blade. Since the chips will bend sharply or slip when contacting the edge of the chip-breaking groove 41 during the high-speed movement process, thereby triggering a secondary shear or local stress concentration effect, this structural design is beneficial to breaking the continuous chips into small segments to a certain extent, thus improving the chip removal state and avoiding the accumulation, entanglement or blockage of the chips between the cutting teeth, which is particularly crucial for the structure of the composite material containing long fibers or continuous reinforcements. At the same time, a guiding part 5 is provided between the adjacent first serration parts 21 and second serration parts 31. The guiding part 5 is used to guide the chips generated by the serration end faces towards the side chip-breaking groove 41 during the rotation of the circular saw body 1. The structure of the guiding part 5 can be a shallow concave drainage groove, a slope or a guiding surface. Its setting purpose is to change the chip discharge direction and form a continuous transition from the end face to the side surface and then to the chip removal path, which is beneficial to avoiding the concentrated accumulation of chips in the cutting area, thereby improving the overall processing quality and surface integrity.

[0023] It is further noted that "staggered arrangement" does not only refer to the staggered distribution of the first sawtooth group 2 and the second sawtooth group 3 in the circumferential direction, but also includes the differential configuration of the two groups of sawteeth in terms of radial cutting angle, tooth height or tooth profile symmetry. This staggered structure can break the problem of poor force consistency of traditional single-group teeth, thereby improving the cutting smoothness and impact resistance. In addition, although the chip breaker groove 41 is provided on the side surface of the saw body, due to its reasonable spatial continuity relationship with the main cutting edge, the chip will naturally contact this groove area during movement, thereby achieving the chip breaking effect. Therefore, although the chip breaker groove 41 is not located on the main cutting surface, it can still effectively break the chip. In addition, the saw blade can be made of cemented carbide material. By optimizing the width of the land and the tooth profile design, the total width of the saw blade is relatively thin, which helps to reduce the amount of processing dust and improve the sawing efficiency, and is suitable for curve cutting operations on five-axis linkage equipment. In actual use, this saw blade has good cutting adaptability to different types of composite materials (such as prepregs, resin injection plastics, honeycomb materials, etc.), can meet the cutting requirements of materials with high or low fiber content, and has a wide range of applications. Through the collaborative optimization of the above-mentioned structure and function configuration, the saw blade with staggered sawteeth provided by the present invention can obtain better cutting quality at high feed rates, and there are fewer phenomena of delamination, tearing and fiber protrusion during the cutting process, thereby improving the surface quality and production efficiency of composite material processing to a certain extent.

[0024] In some embodiments, such as Figure 1 , Figure 2 and Figure 3 shown, the adjacent first sawtooth part 21 and the second sawtooth part 31 are arranged in an inclined and close manner during the upward arrangement, thereby forming a triangular void area on the circular saw body 1 therebetween, which area is called the triangular area 11, and a guiding part 5 is arranged inside the triangular area 11. The guiding part 5 has a first guiding surface 51 and a second guiding surface 52 arranged away from each other, wherein the inclination direction of the first guiding surface 51 is the same as the inclination direction of the first sawtooth part 21, and the inclination direction of the second guiding surface 52 is the same as the inclination direction of the second sawtooth part 31. This configuration with consistent inclination helps to naturally guide the chip along the cutting direction of the sawteeth into the guiding groove formed by the guiding part 5 during the rotation and cutting process of the circular saw body 1. Further, a first guiding groove 12 is formed between the first guiding surface 51 and the first sawtooth part 21, and a second guiding groove 13 is formed between the second guiding surface 52 and the second sawtooth part 31. The two guiding grooves are respectively communicated with different chip breaker grooves 41 provided on the lower surface of the circular saw body 1, thereby constituting a multi-stage chip conveying path from the cutting edge to the side surface of the saw body and then to the chip breaker groove 41 on the lower surface.

[0025] It should be noted that the "adjacent first serrated part 21 and second serrated part 31" here specifically refers to the two outermost serrations arranged at the boundaries of their respective serration groups, that is, a first serrated part 21 at one end of the first serration group 2 and the closest second serrated part 31 in the second serration group 3 adjacent to it in the circumferential direction. Since there is no direct adjacency relationship between the first serrated part 21 and the second serrated part 31 in the tooth profile arrangement of other parts of the circular saw body 1, the above structure is only formed at the transition section between the two groups of serrations. By setting the guiding part 5 with a two-way guiding function and the corresponding guiding groove at this specific position, not only can the chips generated during end face cutting be effectively converged and diverted, but also because the first guiding groove 12 / second guiding groove 13 itself has a certain volume, it can temporarily store the excess chips when the circular saw body 1 is running at high speed, avoiding their concentrated accumulation in the main cutting area in a short time, which is beneficial to reducing the interference degree of the chips on the cutting interface, and thus conducive to improving the integrity of the cutting surface and the machining quality.

[0026] From the perspective of the chip flow path, this structure realizes the connected design from the serrated part - the first guiding groove 12 / second guiding groove 13 - the chip breaking groove 41 - the chip discharging channel, breaking the problems of unclear chip path and poor chip accumulation in traditional tools, and improving the chip discharging efficiency. The inclined structure of the first guiding groove 12 / second guiding groove 13 also slows down the chip flow velocity to a certain extent and reduces the dragging and tearing effect of fibrous chips on the edge of the composite material. Therefore, the setting of the above guiding part 5 not only enriches the functions of the serration transition area structurally, but also provides strong support for the high-quality cutting of composite material parts effectively. Through the combination of the above structure and function, the cutting stability, machining finish and the service life of the circular saw body 1 can be improved to a certain extent, and it is applicable to the high-efficiency and high-quality cutting and processing of various types of composite material parts.

[0027] In some embodiments, in combination with Figure 1 、 Figure 2 and Figure 3, to solve the possible structural interference problems during the layout of the first serration group 2 and the second serration group 3 on the outer periphery of the circular saw blade 1 with a serrated staggered shape, and to improve the chip evacuation efficiency and surface quality during cutting, the serration transition structure has been refined accordingly. Specifically, the adjacent first serration parts 21 are locally beveled near their upper ends to form a first avoidance surface 211, which is used to avoid the second serration part 31 adjacent to it circumferentially in the structural layout; similarly, the upper parts of the adjacent second serration parts 31 are also beveled to form a second avoidance surface 311 to avoid the first serration part 21 structurally. Since the first serration part 21 and the second serration part 31 are arranged in a left-right symmetrically inclined state during layout, if they are too close to each other, physical interference will occur due to the opposite inclination directions without treatment, which will not only affect the overall rigidity of the circular saw blade 1 but also limit the precise forming of the tooth shape. By setting the first avoidance surface 211 and the second avoidance surface 311, it is possible to effectively avoid the mutual interference between the tooth parts while maintaining a high tooth density, meeting the dual requirements of machining space and tool strength.

[0028] In addition, a collecting groove 14 is provided in the area of the circular saw blade 1 between the first avoidance surface 211 and the second avoidance surface 311. Structurally, the collecting groove 14 is connected to one of the chip-breaking grooves 41 on the upper surface of the circular saw blade 1, and functionally, it serves as a concentrated guiding and transfer channel for the cutting debris between the first avoidance surface 211 and the second avoidance surface 311. More specifically, one side edge of the first avoidance surface 211 constitutes one side groove edge of the collecting groove 14, and one side edge of the second avoidance surface 311 constitutes the other side groove edge of the collecting groove 14, and the two cooperate to form a chip storage space with an upward opening. The collecting groove 14 not only facilitates guiding the chips to converge orderly to the preset chip evacuation path when the circular saw blade 1 rotates for cutting, but also improves the chip evacuation efficiency of the chip-breaking groove 41 to a certain extent and reduces the risk of secondary interference of the chips in the cutting area.

[0029] To further improve the volume and guiding effect of the collecting groove 14, both the first avoidance surface 211 and the second avoidance surface 311 present a composite curved surface structure that first depresses inward and then extends outward from the direction far from the collecting groove 14 to the direction close to the collecting groove 14. Such a design can make the debris generated at the initial stage of cutting be guided by the depressed surface and preferentially gather at the most concave parts of the two avoidance surfaces, thus achieving the effect of temporary buffer storage. As the chip volume gradually increases, the chips will be transferred towards the collecting groove 14 under the action of the outer extension curved surface of the avoidance surface and finally be introduced into the chip-breaking groove 41 through the collecting groove 14, realizing the functional coupling of segmented chip guiding and centralized chip evacuation. This composite curved surface design has stronger chip-holding capacity and chip guiding ability compared with the traditional linear avoidance structure, and is especially suitable for alleviating problems such as complex chip shape, strong adhesion, and easy entanglement during the cutting of composite materials.

[0030] It should be noted that, to avoid term ambiguity, the "first avoidance surface 211" and the "second avoidance surface 311" specifically refer to the inclined surfaces formed by the local oblique cutting process at the upper end of the serrated part, which constitute the transition area between the serrations in the rotation direction of the circular saw blade 1; the "collection groove 14" is a sunken groove structure inside this transition area, which is connected to the chip-breaking groove 41 on the upper surface and serves the triple functions of confluence, chip guiding, and chip accumulation reduction. With the mutual cooperation of the above structural design and action mechanism, this embodiment not only solves the problem of serration structure interference, but also further optimizes the cutting stability and chip removal path of the circular saw blade 1 during the high-efficiency machining of composite materials, which helps to improve the overall machining performance and service life of the circular saw blade 1.

[0031] In some examples, referring to Figure 1 , Figure 2 and Figure 3 , to address the structural interference problem caused by the inclined arrangement of the first serrated part 21 and the second serrated part 31 in the serrated staggered saw blade, which causes them to approach each other in the vertical direction, corresponding avoidance structures are provided to improve the tooth arrangement density and chip removal performance of the saw blade. Specifically, in the area of the adjacent first serrated part 21 near its lower end, a local cutting is performed on this part to form a third avoidance surface 212 with a certain inclination; correspondingly, a similar cutting is also performed on the lower part of the adjacent second serrated part 31 to form a fourth avoidance surface 312. The third avoidance surface 212 and the fourth avoidance surface 312 are respectively used to avoid the mutual interference between the first serrated part 21 and the second serrated part 31 in the vertical direction during the tooth arrangement process. Especially in the inclined serration staggered design, the higher the arrangement density and the larger the inclination angle, the more significant the potential structural conflict at this place.

[0032] Furthermore, to balance structural avoidance and function guidance, a guiding part 5 is provided between the third avoidance surface 212 and the fourth avoidance surface 312 as an auxiliary channel for the chips to be exported from the serration end face to the side face. The guiding part 5 has a similar function to the guiding part 5 when approaching in the bottom-to-top direction set in the above other embodiments, that is, during the rotation cutting process of the circular saw blade 1, it is beneficial to guide the residual chips generated during the cutting process to move along the guiding direction, thereby reducing the chip accumulation phenomenon at the cutting edge to a certain extent, optimizing the chip removal path, and improving the cutting quality and stability.

[0033] In the specific structural expression, both the third avoidance surface 212 and the fourth avoidance surface 312 are inclined surfaces formed by mechanical cutting. Their installation positions are respectively located on the inner surfaces of the lower ends of the first serrated portion 21 and the second serrated portion 31 near the staggered area. Together with the guiding portion 5 between the third avoidance surface 212 and the fourth avoidance surface 312, a transition area is formed. This area not only has a geometric space to avoid interference but also has a certain degree of chip guiding and chip storage functions. The terms "third avoidance surface 212", "fourth avoidance surface 312" and "guiding portion 5" should be consistent with those in the claims in this embodiment and should not be arbitrarily replaced or understood to avoid semantic ambiguity or misunderstanding. In summary, based on the staggered arrangement of the saw teeth, by setting the third avoidance surface 212, the fourth avoidance surface 312 and the guiding portion 5 located therebetween, the interference between the saw teeth is avoided in the structural arrangement. At the same time, in terms of function realization, an effective chip removal guiding path is provided for the cutting process, thereby improving the cutting accuracy and working stability of the overall saw blade to a certain extent.

[0034] In some embodiments, referring to Figure 1 , Figure 2 and Figure 3 , for the area between the third avoidance surface 212 and the fourth avoidance surface 312 provided due to the mutual inclination and approach of the first serrated portion 21 and the second serrated portion 31 from top to bottom in the saw blade with staggered saw teeth, in order to further improve the chip export efficiency during the cutting process, the third guiding surface 53 and the fourth guiding surface 54 with a structure deviating from each other are specially provided. Among them, the inclination direction of the third guiding surface 53 is consistent with the inclination direction of the second serrated portion 31, and the inclination direction of the fourth guiding surface 54 is consistent with the inclination direction of the first serrated portion 21. This inclination consistency design is beneficial for the chips to naturally slide along the original cutting direction of the saw teeth into the guiding structure, thereby improving the smoothness and export efficiency of the guiding path.

[0035] The third guiding surface 53 and the third avoidance surface 212 together form the third guiding groove 15, and the fourth guiding surface 54 and the fourth avoidance surface 312 together form the fourth guiding groove 16. The above two guiding grooves are both communicated with the chip breaking groove 41 provided on the lower surface of the circular saw body 1, thereby forming a chip transmission path in the structure that enters from the outer edge of the saw teeth, is introduced through the guiding grooves, and finally leads to the chip breaking groove 41. In this way, during the rotation and cutting process of the saw blade, the cutting debris generated in the lower part of the staggered area of the first serrated portion 21 and the second serrated portion 31 can smoothly flow into the chip breaking groove 41 under the guidance of the guiding grooves, effectively reducing the accumulation of residual chips at the roots of the saw teeth and in the staggered area, which is beneficial for extending the cutting life of the saw teeth and improving the working stability of the entire saw blade.

[0036] In this embodiment, it should be specifically noted that the third guiding surface 53 and the fourth guiding surface 54 respectively refer to two inclined surfaces within the guiding portion 5 for forming a guiding groove and guiding chips. Their "facing away from each other" does not mean that the structures are completely symmetrical or away from each other, but is used to describe that they respectively face the same inclined direction as the adjacent sawtooth portions. Similarly, the connection relationship between the "third guiding groove 15" and the "fourth guiding groove 16" means that they are structurally connected to different chip-breaking grooves 41 on the lower surface of the circular saw blade 1, rather than the two guiding grooves directly communicating with each other. These expressions should be understood in combination with the three-dimensional spatial relationship of the staggered arrangement of the sawteeth and the guiding structure.

[0037] In summary, by providing the guiding portion 5 between the third relief surface 212 and the fourth relief surface 312, and further forming the third guiding surface 53 and the fourth guiding surface 54 within the guiding portion 5 that match the inclined direction of the sawteeth, it is beneficial to smoothly guide the chips to the chip-breaking groove 41 on the lower surface of the circular saw blade 1 during the operation of the saw blade, improve the chip guiding efficiency, and improve the chip discharging effect, thereby playing a positive role in improving the cutting quality and the service life of the saw blade.

[0038] In some embodiments, referring to Figure 1 , Figure 2 and Figure 3 , in order to further improve the chip diversion and discharge capabilities of the staggered saw blade during high-load and high-frequency cutting processes, a structure that is inclined and intersecting and communicating is specifically designed between the upper ends of the third guiding groove 15 and the fourth guiding groove 16, and a converging portion 6 is provided at the intersection. The converging portion 6, as the intersection node of the third guiding groove 15 and the fourth guiding groove 16, plays a role of collecting and transferring in the chip guiding path, which is beneficial to effectively diverting a part of the chips through the intersection area in the case of a large chip volume or an increased risk of blockage in the two guiding grooves, thereby reducing the load pressure on a certain channel. In addition, above the converging portion 6, that is, between the adjacent first sawtooth portion 21 and the second sawtooth portion 31, a fifth guiding groove 17 is provided, and the first end of the fifth guiding groove 17 is communicated with the chip-breaking groove 41 on the upper surface of the circular saw blade 1, and the second end is communicated with the converging portion 6, thereby forming a "person"-shaped guiding channel in terms of structure.

[0039] This "V"-shaped structural design not only provides a two-way guiding path but also forms a flow mechanism of convergence and then export in the cutting direction. Specifically, when the circular saw blade 1 rotates at a high speed for cutting, the chips introduced by the third guiding groove 15 and the fourth guiding groove 16 will converge towards the gathering part 6 along their respective inclined paths, forming a local confluence at the gathering part 6, and then ascending and being exported to the chip-breaking groove 41 on the upper surface of the circular saw blade 1 through the fifth guiding groove 17, thereby forming a three-dimensional multi-directional chip guiding system. This structure is beneficial to improving the chip removal ability in the sawtooth area to a certain extent, alleviating the increase in heat and frictional loss caused by accumulation, and further enhancing the stability and service life of the sawteeth during cutting of complex materials or for a long time.

[0040] It should be noted that the "oblique intersection" here means that the third guiding groove 15 and the fourth guiding groove 16 have a certain included angle in the direction near their upper ends, and there is a transition area with mutual connection in the structure. The gathering part 6 is the solid structure of this transition area and is the key position for facilitating collection and diversion; the "V" shape is not only a description of the shape but also indicates its guiding characteristics of double input and single output. This three-groove combined structure is beneficial to realizing more effective chip guidance in a limited space, thereby improving the problem of insufficient chip removal efficiency of traditional sawteeth. In summary, by configuring the third guiding groove 15, the fourth guiding groove 16 and the fifth guiding groove 17 into a "V"-shaped structure, the chip removal efficiency can be effectively improved and the chip jamming phenomenon can be alleviated, providing a strong structural support for the efficient and stable operation of the circular saw blade.

[0041] In some embodiments, in combination with Figure 1 , Figure 2 and Figure 3 , in order to further improve the guiding efficiency of the third guiding groove 15 and the fifth guiding groove 17 for the chips generated during cutting, the cross-sectional shape of the third guiding groove 15 is optimized to be a gradually shrinking "V" - shaped structure from the direction away from the gathering part 6 to the direction close to the gathering part 6. The setting of this "V" - shaped cross-sectional structure makes the groove body form a certain convergence trend during the movement of the chips, thus playing a role of converging and concentrating the guiding direction in the guiding direction of the chips, and having the effect of being beneficial to increasing the pressure and flow velocity of the chip guiding channel. Compared with the guiding groove structures with equal cross-sections or expanding cross-sections, the shrinking "V" - shaped structure is more helpful to prevent the chips from being disorderly accumulated in the groove channel, and at the same time forms a natural chip removal driving force, which is beneficial to achieving a more efficient chip removal purpose.

[0042] In addition, in order to further improve the chip guiding ability of the fifth guiding groove 17, an arc-shaped guiding surface 18 is provided between the adjacent second serrated part 31 and the outer peripheral wall surface of the circular saw body 1, and one side edge of the arc-shaped guiding surface 18 is clearly configured as one side groove edge of the fifth guiding groove 17. The arc-shaped guiding surface 18 is structurally designed to first concave inward and then extend outward from the direction away from the fifth guiding groove 17 to the direction close to the fifth guiding groove 17, forming a composite curved surface structure that converges and guides toward the fifth guiding groove 17. Such a structure enables the chips generated during cutting to flow toward the lowest concave point under the natural guiding action of the concave curved surface when approaching the area of the arc-shaped guiding surface 18, thus being beneficial to achieving centralized confluence. And before approaching the fifth guiding groove 17, the chips are gradually guided by the outward-extending arc section to transition into the fifth guiding groove 17, so as to achieve smooth introduction and slow down the accumulation effect. This structure is similar to the functional logic of the first avoidance surface 211 and the second avoidance surface 311 in claim 4, both of which guide the chips to converge through the concave structure in the initial stage and introduce them into the chip discharge groove by means of the geometric characteristics of the structure in the later stage.

[0043] It should be noted that the "V" shape here is not limited to a standard symmetric form, but refers to a wedge-shaped channel with a converging trend on both sides of the cross-section. This structural design should be adjusted under the condition of meeting the processing technology requirements to balance strength and chip discharge effect. The setting of the "arc-shaped guiding surface 18" is not only a design of the appearance form, but a dynamic guiding surface structure, which can form a continuous sliding guiding path for the chips close to the outer peripheral area during the high-speed rotation of the saw blade. Therefore, through the above structural settings, not only the controllability and smoothness of the chip guiding path are improved to a certain extent, but also the serrated saw blade has higher anti-blocking performance and service life in actual cutting applications.

[0044] In a second aspect, some embodiments of the present application further provide a saw blade production process, which is characterized in that it is used to manufacture the serrated saw blade in the first aspect, and includes the following steps: First, a high-strength metal plate is selected as the raw material substrate, and the plate is processed into a circular saw body 1 with a predetermined size by a precision numerical control cutting device. A plurality of first serrated groups 2 and second serrated groups 3 are alternately cut along the circumferential direction on the outer periphery of the circular saw body 1. The two groups of serrations are arranged at intervals in the circumferential direction in turn to form a serrated staggered structure; at the same time, a plurality of chip-breaking parts 4 are opened on the upper and lower side surfaces of the circular saw body 1. The chip-breaking parts 4 are formed into a through structure through the cutting process, so as to form a plurality of chip-breaking grooves 41 for subsequent chip discharge, providing a communication channel for the guiding grooves and the gathering part 6 between the serrations.

[0045] After the structure is processed, in order to release the residual stress generated inside the material during the processing and improve the mechanical properties of the material surface, shot peening or sandblasting treatment is performed on the circular saw body 1. In this step, a high-speed particle flow is used to impact the surface of the circular saw body 1 to introduce compressive stress into the metal surface layer, thereby suppressing the initiation and propagation of cracks to a certain extent, which is beneficial to improving the fatigue resistance of the saw blade during high-load and high-speed cutting processes. In order to control the material deformation and stress concentration problems after shot peening or sandblasting treatment, by detecting the stress state of the processed circular saw body 1 and adjusting the particle size and injection speed of the shot peening or sandblasting particles, the stress deformation of the final circular saw body 1 is controlled within the range of ≤0.2 mm. The "stress ≤0.2 mm" here refers to the limit value of the material warping or deformation caused by the stress in the thickness or flatness direction, aiming to ensure the overall flatness and geometric stability of the finished saw blade and prevent yaw or vibration during high-speed rotation.

[0046] Finally, a titanium metal coating is applied to the surface of the circular saw body 1 after stress treatment. This titanium coating has excellent hardness, wear resistance and oxidation resistance, which can improve the cutting performance and service life of the saw blade to a certain extent, and enhance its stability under high-temperature and high-speed processing conditions. This coating is realized by vacuum coating processes such as physical vapor deposition (PVD), ensuring that the coating adheres firmly and is evenly distributed on the surface of the saw body. Through the coordinated control of the above multi-steps, not only does the manufactured serrated saw blade have good structural consistency and dimensional accuracy, but also significant enhancement is achieved in terms of material properties and surface functions, which is beneficial to improving the overall performance of the saw blade under cutting conditions of metals, high-strength alloys or composite materials. This production process is suitable for batch manufacturing and has a practical basis for industrial promotion.

[0047] In a third aspect, some embodiments of the present application also provide a device with a serrated saw blade, which is characterized by including the serrated saw blade of the first aspect and can be used for cutting composite material parts.

[0048] The above are only the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention.

Claims

1. A saw blade with staggered teeth, characterized in that: include: Circular saw body (1); A first saw tooth group (2), a plurality of which are arranged on the outer peripheral wall surface of the circular saw body (1); A plurality of second saw tooth groups (3) are also provided on the outer peripheral wall surface of the circular saw body (1), and the first saw tooth groups (2) and the second saw tooth groups (3) are arranged alternately in the circumferential direction of the circular saw body (1); wherein: The first sawtooth group (2) is composed of a plurality of first sawtooth portions (21) arranged in sequence on the outer circumference of the circular saw body (1), and the second sawtooth group (3) is composed of a plurality of second sawtooth portions (31) arranged in sequence on the outer circumference of the circular saw body (1), and the first sawtooth portions (21) and the second sawtooth portions (31) are both configured as inclined sawtooth portions and are obliquely symmetrical to the left and right; A plurality of chip breaking portions (4) are circumferentially arranged on the side surface of the circular saw body (1), and the plurality of chip breaking portions (4) located in the same radial direction of the circular saw body (1) form a chip breaking groove (41); The guide portion (5) is arranged between two adjacent first sawtooth portions (21) and second sawtooth portions (31), and is used to automatically guide chips from the end surface to the chip breaker groove (41) on the side surface during the rotation of the circular saw body (1).

2. The staggered saw blade according to claim 1, characterized in that: When the adjacent first sawtooth portions (21) and second sawtooth portions (31) are inclined and approach each other from bottom to top, a triangular area (11) is formed on the circular saw body (1) and between the adjacent first sawtooth portions (21) and second sawtooth portions (31), and the guide portion (5) is disposed in the triangular area (11); The guide portion (5) comprises a first guide surface (51) and a second guide surface (52) which are separated from each other, the inclination direction of the first guide surface (51) is consistent with the inclination direction of the first sawtooth portion (21), and the inclination direction of the second guide surface (52) is consistent with the inclination direction of the second sawtooth portion (31); A first guide groove (12) is formed between the first guide surface (51) and the first sawtooth portion (21), and the first guide groove (12) is connected to one of the chip breaking grooves (41) located on the lower surface of the circular saw body (1); A second guide groove (13) is formed between the second guide surface (52) and the second sawtooth portion (31), and the second guide groove (13) is connected to another adjacent chip breaking groove (41) located on the lower surface of the circular saw body (1).

3. The staggered saw blade according to claim 2, characterized in that: A portion of the adjacent first sawtooth portion (21) close to its upper end is cut to form a first avoidance surface (211), the first avoidance surface (211) being used to avoid the adjacent second sawtooth portion (31); The upper end portion of the adjacent second sawtooth portion (31) is cut to form a second avoidance surface (311), and the second avoidance surface (311) is used to avoid the adjacent first sawtooth portion (21).

4. The staggered saw blade according to claim 3, characterized in that: A collecting groove (14) is provided on the circular saw body (1) and located between the first avoidance surface (211) and the second avoidance surface (311); the collecting groove (14) is connected to one of the chip breaker grooves (41) on the upper surface of the circular saw body (1); one side edge of the first avoidance surface (211) is configured as one side groove edge of the collecting groove (14); and one side edge of the second avoidance surface (311) is configured as the other side groove edge of the collecting groove (14); From a direction away from the collecting groove (14) to a direction close to the collecting groove (14), the first avoidance surface (211) is recessed inwards and then extends outwards to the collecting groove (14); and / or, from a direction away from the collecting groove (14) to a direction close to the collecting groove (14), the second avoidance surface (311) is recessed inwards and then extends outwards to the collecting groove (14).

5. The staggered saw blade according to claim 1, characterized in that: When the adjacent first sawtooth portions (21) and second sawtooth portions (31) are inclined and approach each other from top to bottom, a portion of the adjacent first sawtooth portion (21) close to its lower end is cut to form a third avoidance surface (212), and the third avoidance surface (212) is used to avoid the adjacent second sawtooth portion (31). A portion of the adjacent second sawtooth portion (31) close to its lower end is cut to form a fourth avoidance surface (312), and the fourth avoidance surface (312) is used to avoid the adjacent first sawtooth portion (21). The guide portion (5) is arranged between the third avoidance surface (212) and the fourth avoidance surface (312).

6. The staggered saw blade according to claim 5, characterized in that: The guide portion (5) has a third guide surface (53) and a fourth guide surface (54) which are separated from each other, the inclination direction of the third guide surface (53) is consistent with the inclination direction of the second sawtooth portion (31), and the inclination direction of the fourth guide surface (54) is consistent with the inclination direction of the first sawtooth portion (21); A third guide groove (15) is formed between the third guide surface (53) and the third avoidance surface (212), and the third guide groove (15) is connected to one of the chip breaking grooves (41) located on the lower surface of the circular saw body (1); A fourth guide groove (16) is formed between the fourth guide surface (54) and the fourth avoidance surface (312), and the fourth guide groove (16) is connected to another chip breaker groove (41) located on the lower surface of the circular saw body (1).

7. The staggered saw blade according to claim 6, characterized in that: The upper end of the third guide groove (15) and the upper end of the fourth guide groove (16) are obliquely intersected and connected, and the oblique connection point between the third guide groove (15) and the fourth guide groove (16) is configured as a collection portion (6); A fifth guide groove (17) is provided between the first sawtooth portion (21) and the second sawtooth portion (31) and above the guide portion (5); a first end of the fifth guide groove (17) is connected to one of the chip breaker grooves (41) located on the upper surface of the circular saw body (1); a second end of the fifth guide groove (17) is connected to the collection portion (6), so that the third guide groove (15), the fourth guide groove (16) and the fifth guide groove (17) form a "human" shape.

8. The staggered saw blade according to claim 7, characterized in that: The cross-sectional shape of the third guide groove (15) is configured to be a "V" shape that gradually shrinks from away from the collection portion (6) to close to the collection portion (6); And / or, the adjacent second sawtooth portions (31) and the outer peripheral wall surface of the circular saw body (1) jointly form an arc-shaped guide surface (18), one side edge of the arc-shaped guide surface (18) is configured as a side groove edge of the fifth guide groove (17), and the arc-shaped guide surface (18) is configured to be concave first and then extend outward from a direction away from the fifth guide groove (17) to a direction close to the fifth guide groove (17).

9. A saw blade production process, characterized in that: The method for manufacturing the staggered saw blade according to any one of claims 1 to 8 comprises the following steps: Cutting the plate to obtain a circular saw body (1), cutting a plurality of first saw tooth groups (2) and second saw tooth groups (3) which are alternately distributed in a circumferential manner on the outer circumference of the circular saw body (1), and cutting a plurality of chip breaking portions (4) on the upper and lower side surfaces of the circular saw body (1), thereby forming a chip breaking groove (41); After the circular saw body (1) is subjected to shot peening or sand blasting, the stress of the circular saw body (1) is detected, and the particle size and speed of the shot peening or sand blasting are controlled according to the detection result so that the stress of the circular saw body (1) meets the requirement of ≤0.2 mm; A titanium metal coating is applied to the surface of the circular saw body (1).

10. A device with a saw blade with staggered teeth, characterized in that: The staggered saw blade including the serrated teeth described in any one of claims 1 to 8 can be used for cutting composite material parts.

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