Tool bit and circular saw blade

Abstract

The utility model discloses a tool bit and a circular saw blade. The tool bit comprises an inner edge and an outer edge, the outer edge is provided with a plurality of sawteeth, and the thicknesses of the sawteeth are gradually reduced in the direction away from the inner edge. By adopting the technical scheme, the initial contact area with a cut material is reduced to reduce the cutting resistance, so that the surface layer of the cut material is more easily penetrated, the impact force and friction force from the cut material are reduced, smooth and efficient cutting start is realized, the cutting efficiency is improved, and the service life of the cutter head is prolonged.

Description

Technical Field

[0001] This application relates to the field of cutting technology, specifically to a cutting head and a circular saw blade. Background Technology

[0002] With the continuous development of infrastructure, metal materials are being used on a large scale, which has spurred the rapid development of the metal processing industry. How to cut metal materials conveniently, safely, and efficiently has become a hot topic. Brazed diamond circular saw blades developed using high-temperature vacuum brazing technology have the characteristics of high abrasive grain exposure, sharp abrasive grain edges, no dust pollution during sawing, strong holding force, and long service life, making them a product with great market potential in the field of metal cutting.

[0003] Referring to the irregularly shaped mounting hole circular saw blade with authorization announcement number CN205496697U, in existing brazed diamond circular saw blades, when cutting metal materials, the top teeth of the brazed diamond circular saw blade directly bear the cutting force and impact force. The uniform tooth design, when cutting hard materials, is prone to gradual wear of the teeth (diamond breakage and loss) due to excessive impact force, increasing cutting resistance, leading to decreased cutting efficiency and affecting saw blade life. Simultaneously, due to the adhesiveness and clogging properties of metal chips, brazed diamond circular saw blades are prone to chip removal difficulties, causing metal chips to adhere and clog the diamond surface, affecting cutting ability and resulting in a low cutting life. Furthermore, uneven diamond distribution, with some cutting teeth having more diamonds than others, leads to poor cutting results. Utility Model Content

[0004] In view of the above problems, this application provides a cutting head that can reduce cutting resistance, facilitate cutting, and reduce the impact force on the diamond, thereby improving the problem of easy wear of the saw teeth in existing cutting heads.

[0005] A cutting head includes an inner edge and an outer edge; the outer edge has a plurality of serrations, the thickness of which gradually decreases in a direction away from the inner edge.

[0006] Furthermore, the outer edges of the two end faces of the cutter head extend toward the central section in the thickness direction of the cutter head to form a serrated cutting surface.

[0007] Furthermore, the cutting surfaces of the two serrations form the cutting edge of the serration at the center section in the thickness direction of the cutter head.

[0008] Furthermore, the thickness of the saw teeth gradually increases along the cutting direction.

[0009] Furthermore, the cutting head has a chamfered surface along the cutting direction.

[0010] Furthermore, the cutting head is formed by mixing 30 / 35 mesh brazing filler and 30 / 35 mesh diamond.

[0011] Furthermore, the diamond and brazing filler each account for 50%.

[0012] A circular saw blade, employing the aforementioned cutting head; comprising:

[0013] The substrate is disc-shaped and has a mounting through hole at its center.

[0014] Multiple cutting heads, the inner edges of which are connected to the outer periphery of the substrate.

[0015] Furthermore, adjacent cutting heads have a circumferential pitch on the outer periphery of the substrate, and a chip removal duct is formed on the substrate between adjacent cutting heads, the chip removal duct extending radially along the substrate.

[0016] Furthermore, the end of the chip removal duct near the mounting through hole has a cold air hole.

[0017] Unlike existing technologies, the above-mentioned technical solution designs the end of the saw teeth away from the inner edge (i.e., the end in contact with the material being cut during the cutting operation) to be relatively thin, optimizing the cutting performance at the beginning of the cutting process. By reducing the initial contact area with the material being cut, the cutting resistance is reduced, making it easier to penetrate the surface of the material being cut. This reduces the impact and friction from the material being cut, achieving a smooth and efficient cutting start, and improving cutting efficiency and blade life. At the same time, the other end of the saw teeth near the inner edge is designed to have a relatively thick structure, enhancing the connection strength. Especially when subjected to the reaction force and thermal stress from the material during the cutting process, the other end of the saw teeth near the inner edge can better disperse and absorb these stresses, preventing the saw teeth from breaking or falling off during long-term or high-intensity cutting operations. This helps to improve the overall stability of the saw teeth and ensures consistent cutting quality and performance during the cutting process.

[0018] The above description of the utility model is merely an overview of the technical solution of this application. In order to enable those skilled in the art to better understand the technical solution of this application and to implement it based on the description and drawings, and to make the above-mentioned objectives and other objectives, features and advantages of this application easier to understand, the following description is provided in conjunction with the specific embodiments and drawings of this application. Attached Figure Description

[0019] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of specific embodiments of this utility model and other related contents, and should not be considered as limitations on this application.

[0020] In the accompanying drawings of the instruction manual:

[0021] Figure 1 This is a schematic diagram of the cutter head structure described in the embodiment;

[0022] Figure 2 This is a schematic diagram of the cutter head structure described in the embodiment;

[0023] Figure 3 This is a schematic diagram of the circular saw blade structure described in the embodiment;

[0024] Figure 4 This is a schematic diagram of the circular saw blade structure described in the embodiment;

[0025] Figure 5 This is a schematic diagram of the circular saw blade structure described in the embodiment.

[0026] The reference numerals used in the above figures are explained as follows:

[0027] 10. Blade tip;

[0028] 101. Inner edge;

[0029] 102. Outer edge;

[0030] 1021. Sawtooth;

[0031] 10211, Cutting surface; 10212, Cutting edge;

[0032] 103. Chamfered surface;

[0033] 20. Matrix;

[0034] 201. Mounting through hole; 202. Circumferential pitch; 203. Chip removal duct; 204. Cooling air vent;

[0035] a. Center section in the thickness direction of the cutter head. Detailed Implementation

[0036] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0037] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0038] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0039] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0040] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0041] Without further limitations, the use of terms such as “comprising,” “including,” “having,” or other similar open-ended expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0042] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0043] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0044] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral arrangement; it can be a direct connection or an indirect connection through an intermediate medium; it can be a relationship of two components combined together, an interaction relationship between two components, or a connection within two structures. Those skilled in the art to which this application pertains can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0045] See Figures 1-2 As shown, a cutting head 10 includes an inner edge 101 and an outer edge 102. The outer edge 102 has serrations 1021. The end of the serrations 1021 facing away from the inner edge 101 (i.e., in contact with the material being cut during the cutting operation) is designed to be relatively thin, optimizing the cutting performance at the beginning of the cutting process. By reducing the initial contact area with the material being cut, the cutting resistance is reduced, making it easier to penetrate the surface of the material being cut. This reduces the impact and friction from the material being cut, achieving a smooth and efficient cutting start, and improving cutting efficiency and the lifespan of the cutting head 10. At the same time, the other end of the serrations 1021 near the inner edge 101 is designed to be relatively thick, enhancing the connection strength. Especially when subjected to the reaction force and thermal stress from the material during the cutting process, the other end of the serrations 1021 near the inner edge 101 can better disperse and absorb these stresses, preventing the serrations 1021 from breaking or falling off during long-term or high-intensity cutting operations. This helps to improve the overall stability of the serrations 1021, ensuring consistent cutting quality and performance during the cutting process.

[0046] The materials to be cut can be metals, such as steel, aluminum, copper, iron, etc., including plates, pipes, and profiles; wood, such as solid wood, engineered wood, plywood, particleboard, etc., including furniture and wood products; plastics, such as polyethylene, polypropylene, polyvinyl chloride, etc., including plastic products, pipes, and plates; stone, such as marble, granite, gypsum, etc., including stone slabs and stone carvings; glass, such as glass sheets and glass bottles; and other materials, such as ceramics, paper, rubber, etc.

[0047] Combination Figures 1-2 Further explanation: This utility model provides an embodiment of a cutting head 10, which includes an inner edge 101 and an outer edge 102; the outer edge 102 has a plurality of serrations 1021, and the thickness of the serrations 1021 gradually decreases in the direction away from the inner edge 101.

[0048] The aforementioned outer edge 102 has a cutting function, cutting the material being cut through a number of saw teeth 1021. The saw teeth 1021 can be trapezoidal tooth tips, triangular tooth tips, wavy tooth tips, etc.

[0049] The thickness of the aforementioned serrations 1021 gradually decreases along the direction away from the inner edge 101. By reducing the initial contact area with the material being cut, the cutting resistance is reduced, thereby making it easier to penetrate the surface layer of the material being cut and reducing the impact and friction forces from the material being cut. In an embodiment not shown, the outer edge of one end face of the cutter head 10 extends to the outer edge of the other end face of the cutter head 10, and serrations 1021 that gradually decrease in thickness along the direction away from the inner edge 101 are formed on the outer edge of the other end face of the cutter head 10. See also Figure 1 and Figure 2 As shown, in some embodiments, the outer edges of the two end faces of the cutter head 10 extend towards the central section a in the thickness direction of the cutter head to form cutting surfaces 10211 of serrations 1021. The cutting surfaces 10211 of the two serrations 1021 form serrations 1021 that gradually decrease in size along the direction away from the inner edge 101. Of course, in order to more easily penetrate the surface layer of the material being cut and reduce the impact and friction from the material being cut, the cutting surfaces 10211 of the two serrations 1021 can form cutting edges 10212 of the serrations 1021 at the central section a in the thickness direction of the cutter head. This allows the cutter head 10 to slide more smoothly during the cutting process, achieving a smooth and efficient cutting start, improving cutting efficiency and the life of the cutter head 10.

[0050] The cutting surface 10211 of the aforementioned saw tooth 1021 can be composed of one or more surfaces. Taking multiple surfaces as an example, in embodiments not shown, at least one of the saw tooth 1021's cutting surface 10211 includes a first cutting surface 10211 and a second cutting surface 10211. That is, in some embodiments, both cutting surfaces 10211 include a first cutting surface 10211 and a second cutting surface 10211. In the same cutting surface 10211, the inner edge of the first cutting surface 10211 is connected to the corresponding end face of the cutter head 10, and the outer edge is connected to the second cutting surface 10211. The second cutting surface 10211 of the two cutting surfaces 10211 forms a cutting edge 10212 at the central section a in the thickness direction of the cutter head. In some embodiments, one of the cutting surfaces 10211 includes a first cutting surface 10211 and a second cutting surface 10211. The inner edge of the first cutting surface 10211 is connected to one end face of the blade head 10, and the outer edge is connected to the second cutting surface 10211. The other cutting surface 10211 includes the first cutting surface 10211. The second cutting surface 10211 of the two cutting surfaces 10211 and the first cutting surface 10211 of the other cutting surface 10211 form a cutting edge 10212 at the central section a in the thickness direction of the blade head. It should be noted that the first cutting surface 10211 and the second cutting surface 10211 of the two cutting surfaces 10211 are merely names according to the order of connection, and are not a limitation on their shape. For example, the first cutting surface 10211 of one cutting surface 10211 may have a different shape than the first cutting surface 10211 of the other cutting surface 10211. The aforementioned cutting surface 10211, the first cutting surface 10211, and the second cutting surface 10211 can be inclined surfaces, curved surfaces (convex arc surfaces, concave arc surfaces), etc. Preferably, the two cutting surfaces 10211 are symmetrical about the central section a in the thickness direction of the cutter head. The symmetrical design of the cutting surface 10211 allows the cutting blade 10212 to maintain better balance during the cutting process, reducing the instability caused by the shift of the center of gravity.

[0051] See Figure 2As shown, in some embodiments, the thickness of the serration 1021 gradually increases along the cutting direction. That is, the end of each serration 1021 that initially contacts the material being cut is designed to be relatively thin, which significantly reduces cutting resistance and the contact area with the material, thereby reducing heat and wear generated by friction, making the cutting process smoother and improving cutting efficiency. Simultaneously, the thin design makes it easier for the serration 1021 to penetrate the surface of the material being cut, especially when dealing with harder or more resilient materials, reducing initial jumping and deviation during cutting and ensuring the accuracy of the cutting path. The design of the serration 1021 gradually thickening after contacting the material allows its load-bearing capacity and stability to gradually increase as the serration 1021 penetrates deeper into the material during the cutting process, helping to maintain the straightness of the cutting path and the flatness of the cut surface 10211. It better absorbs the vibration and noise generated during the cutting process, providing the operator with a quieter and more stable working environment. At the same time, it helps to distribute the load during the cutting process, reduce the wear and breakage of the saw teeth 1021 caused by excessive force, and thus extend the service life of the saw teeth 1021.

[0052] See Figure 2 As shown, to make it easier for the cutting head 10 to cut into the material being cut, the cutting head 10 can be provided with a chamfered surface 103 along the cutting direction, that is, the cutting edge (the edge that first contacts the material being cut) of the cutting head 10 is provided with a chamfered surface 103. The chamfered surface 103 can be arc-shaped, inclined, etc., which helps to form a smoother cutting path during the cutting process, reduces the resistance and friction generated during cutting, thereby improving cutting efficiency; at the same time, it can also reduce resistance and vibration during the cutting process, slow down the breakage and loss of diamond caused by impact, make the cutting process more stable, and further improve cutting efficiency; in addition, it can naturally adjust the cutting angle during the cutting process, more smoothly transition the cutting surface, make the cutting force distribution more uniform, reduce cutting marks and burrs, and improve the smoothness and quality of the machined surface.

[0053] The aforementioned cutting head 10 can be a resin-bonded grinding wheel, a single-layer electroplated diamond saw blade, a multi-layer sintered diamond saw blade, a carbide saw blade, or a brazed diamond circular saw blade. It is particularly suitable for brazed diamond circular saw blades, as it is formed by sintering brazing filler metal and diamond particles. This facilitates early grinding and sharpening of the cutting head, quickly exposing the diamond and improving cutting efficiency. It also features no dust pollution during sawing, strong holding force, and long service life. In some embodiments, the cutting head 10 is formed by mixing 30 / 35 mesh brazing filler metal with 30 / 35 mesh diamond particles. Using 30 / 35 mesh brazing filler metal mixed with 30 / 35 mesh diamond, the mixed powder and diamond are randomly distributed on the cutting head 10 during preparation. By controlling the ratio of brazing filler metal to diamond, the diamond concentration can be effectively controlled. Excessive diamond concentration leads to diamond waste and low cutting efficiency. Adjusting the diamond concentration according to the material being cut can improve cutting efficiency, reduce diamond usage, and increase chip removal. For example, with a 50% diamond concentration, 50% diamond and 50% brazing filler metal are weighed according to volume ratio, mixed, and distributed on the cutting head 10. After brazing, a 50% diamond concentration is obtained.

[0054] See Figures 3-5 As shown, this utility model also provides a circular saw blade, which uses the above-mentioned cutter head 10; it includes a base 20 and a cutter head 10, the cutter head 10 is connected to the base 20, and the cutter head 10 rotates about the axis of the center of the base 20 so that the outer edge 102 of the cutter head 10 with cutting function cuts the material to be cut.

[0055] See Figure 3 As shown, the structure of a blade 10 according to this utility model is further described below. It includes...

[0056] The substrate 20 is disc-shaped, and a mounting through hole 201 is provided at the center of the substrate 20;

[0057] Multiple cutting heads 10, the inner edge 101 of which is connected to the outer periphery of the base 20.

[0058] The aforementioned connection refers to the connection between the base 20 and the cutting head 10. This connection can be a direct, integral molding of the base 20 and the cutting head 10, or they can be separately molded and connected by a joint. The joint involves the inner edge 101 of the cutting head 10 joining the outer periphery of the base 20, allowing the cutting head 10 to rotate together with the base 20. Specifically, the cutting head 10 rotates about the center axis of the base 20 to cut the workpiece. This joint can be achieved through welding or other robust connection methods. Preferably, the center point of the cutting head 10 in the thickness direction and the center point of the base 20 in the thickness direction are on the same horizontal plane. This ensures the circular saw blade remains stable during high-speed rotation, reducing noise and wear caused by imbalance. Based on this, the thickness of the cutting head 10 can differ from the thickness of the base 20. In some embodiments, the thickness of the cutter head 10 is greater than the thickness of the base 20, in which case the two surfaces of the cutter head 10 can be higher than the two surfaces of the base 20; in some embodiments, the thickness of the cutter head 10 is less than the thickness of the base 20, in which case the two surfaces of the cutter head 10 can be lower than the two surfaces of the base 20; in some embodiments, the thickness of the cutter head 10 is equal to the thickness of the base 20, in which case the two surfaces of the cutter head 10 are flush with the two surfaces of the base 20. The consistent thickness of the cutter head 10 and the base helps to reduce vibration and shaking caused by inconsistent thickness, thereby improving the overall stability of the saw blade and ensuring cutting accuracy and efficiency.

[0059] Multiple cutting heads 10 are connected to the outer periphery of the base 20 via an outer edge 102. The multiple cutting heads 10 can be closely arranged and connected to the outer periphery of the base 20; alternatively, they can be spaced apart and connected to the outer periphery of the base 20, see [reference needed]. Figure 3 As shown, adjacent cutting heads 10 have a circumferential pitch 202 on the outer periphery of the base 20. The circumferential pitch 202 between adjacent cutting heads 10 can increase the cutting channel, making it easier for chips to be discharged from the cutting area, reducing blockage and heat accumulation during the cutting process, thereby improving cutting efficiency and processing speed; at the same time, it reduces the vibration and resonance between the cutting heads 10 during the cutting process, thereby reducing the vibration and noise generated during cutting. The circumferential pitch 202 of adjacent cutting heads 10 on the outer periphery of the base 20 may be different, meaning that the multiple cutting heads 10 are not equally distributed along the outer periphery of the base 20; the circumferential pitch 202 of adjacent cutting heads 10 on the outer periphery of the base 20 may also be the same, meaning that the multiple cutting heads 10 are equally distributed along the outer periphery of the base 20, so that the cutting force is more evenly distributed on the entire base 20, so that the cutting force can be evenly transmitted to the base 20, reducing the vibration and deviation of the base 20 caused by uneven cutting force; at the same time, it makes the cutting head 10 more evenly contact the material being cut during the cutting process, reducing the concentration and uneven distribution of cutting force, and improving cutting stability.

[0060] See Figure 4 As shown, in some embodiments, a chip removal duct 203 is formed on the base 20 between adjacent cutting heads 10, and the chip removal duct 203 extends radially along the base 20. The chip removal duct 203 can quickly discharge chips and dust generated during the cutting process, thereby facilitating the discharge of chips and heat, and reducing the risk of deformation of the base 20 and detachment of the cutting head 10 due to heat and chip accumulation. See also Figure 5 As shown, the chip removal air duct 203 also has a cold air hole 204 at one end near the mounting through hole 201. The cold air hole 204 can introduce external cold air to effectively dissipate the heat generated during the cutting process, reduce the temperature of the cutting head 10 and the base 20, and reduce the thermal stress, thermal fatigue and thermal deformation of the cutting head 10 and the base 20 caused by high temperature through effective cooling, prevent performance degradation or damage caused by overheating, and thus extend their service life.

[0061] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A cutting head, characterized in that, The cutting head includes an inner edge and an outer edge; the outer edge has a plurality of serrations, the thickness of which gradually decreases in the direction away from the inner edge; the outer edges of the two end faces of the cutting head extend toward the central section in the thickness direction of the cutting head to form the cutting surface of the serrations; the cutting surfaces of the two serrations form the cutting edge of the serrations at the central section in the thickness direction of the cutting head; the cutting head is made of brazed diamond.

2. The cutting head according to claim 1, characterized in that, The thickness of the saw teeth gradually increases along the cutting direction.

3. The cutting head according to claim 1, characterized in that, The cutter head has a chamfered surface along the cutting direction.

4. A circular saw blade, employing the cutting head described in any one of claims 1-3; characterized in that, include The substrate is disc-shaped and has a mounting through hole at its center. Multiple cutting heads, the inner edges of which are connected to the outer periphery of the substrate.

5. The circular saw blade according to claim 4, characterized in that, The adjacent cutting heads have a circumferential pitch on the outer periphery of the substrate, and a chip removal air passage is formed on the substrate between the adjacent cutting heads, the chip removal air passage extending radially along the substrate.

6. The circular saw blade according to claim 5, characterized in that, The end of the chip removal duct near the mounting through hole has a cold air hole.

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