Tool bit and circular saw blade

Abstract

The utility model provides a tool bit and a circular saw blade. The tool bit comprises an inner edge and an outer edge with a cutting function, the tool bit is further provided with a groove, and the groove is formed by sinking from the outer edge to the inner edge in the middle of the tool bit in the thickness direction. According to the technical scheme, the groove serves as a chip removal channel, so that powdered chips in the groove can be washed away in time, accumulation of the powdered chips is reduced, the phenomena of blockage and tool jamming in the cutting process are avoided, the sharpness of the outer edge of the tool bit is kept, and then the cutting efficiency of the circular saw blade is kept.

Description

Technical Field

[0001] The utility model relates to the technical field of cutting, in particular to a cutting head and a circular saw blade. Background Art

[0002] A circular saw blade has a disc-shaped base body and a plurality of cutting heads joined to the outer periphery of the base body. The cutting heads are made of, for example, cemented carbide or sintered diamond. By rotating the circular saw blade around an axis passing through the disc-shaped center of the base body, the outer edge (cutting edge) of the cutting head for cutting cuts the workpiece to be cut. The plurality of cutting heads for cutting intermittently cut the workpiece to be cut, and thus the workpiece to be cut can be cut by the circular saw blade.

[0003] In the existing circular saw blades, especially during the cutting operation of sintered diamond, a large amount of powder chips and heat are generated during the cutting process. Cooling water is required to wash the cutting head in time to remove the powder chips on its surface and take away the heat. Referring to a processing technology of a sintered diamond circular saw blade with the authorized patent CN112453412 B, a large amount of powder chips and heat generated during the sawing process accumulate on the outer edge of the cutting head, and the cooling water cannot wash the cutting head in time to remove its powder chips, reducing the sharpness of the saw blade and thus affecting the cutting efficiency. Moreover, during the cutting process, the outer edge of the cutting head is often slow to be sharpened, and the diamond fails to emerge in time, thus affecting the sawing efficiency; at the same time, due to the friction and impact between the outer edge of the cutting head and the workpiece during the cutting process, a large amount of noise will be generated, greatly reducing the use experience of the saw blade. Summary of the Utility Model

[0004] Therefore, a cutting head is needed, the structure of which has sufficient chip removal space and can solve the problem that the sharpness of the saw blade decreases due to the accumulation of rock powder and heat on the surface of the cutting head.

[0005] To achieve the above object, the utility model provides a cutting head, which includes an inner edge and an outer edge with a cutting function; the cutting head further has a groove, and the groove is formed by recessing from the outer edge to the inner edge in the middle along the thickness direction of the cutting head.

[0006] Further, the outer edge is serrated.

[0007] Further, the cutting head is at least formed by laminating three layers of matrix thin sheets; the length from the outer edge to the inner edge of the inner matrix thin sheet is less than that of the outer matrix thin sheet.

[0008] Further, each matrix thin sheet is formed by sintering including matrix powder and diamond particles.

[0009] Further, the wear of the matrix powder of the inner matrix thin sheet is greater than that of the outer matrix thin sheet.

[0010] Further, the matrix powder of the inner matrix thin sheet includes bronze powder; the matrix powder of the outer matrix thin sheet includes brass powder.

[0011] A circular saw blade using the above cutting head, which comprises

[0012] a substrate, the substrate being in a disc shape;

[0013] a plurality of cutting heads, the inner edges of the cutting heads being connected to the outer periphery of the substrate.

[0014] Further, adjacent cutting heads have a circumferential pitch on the outer periphery of the substrate.

[0015] Further, the tangent line at the connection between the side edge of each cutting head and the outer periphery of the substrate forms an angle, and the angle is 30° - 60°.

[0016] Different from the prior art, in the above technical solution, a groove is provided in the cutting head, and the groove is recessed from the outer edge to the inner edge in the middle along the thickness direction of the cutting head, so that during the cutting operation of the cutting head, a large amount of powder chips generated during the cutting process can be stored in the groove. The groove is used as a chip removal channel, so that the powder chips in the groove can be washed away in time, reducing the accumulation and deposition of powder chips, avoiding blockage and jamming of the cutting tool during the cutting process, and maintaining the sharpness of the outer edge of the cutting head. Description of the Drawings

[0017] Figure 1 Schematic diagram of the cutting head structure according to the specific embodiment;

[0018] Figure 2 Schematic diagram of the separated structure of the matrix thin sheet of the cutting head according to the specific embodiment;

[0019] Figure 3 Schematic diagram of the cutting head structure according to the specific embodiment;

[0020] Figure 4 Schematic diagram of the cutting head structure according to the specific embodiment;

[0021] Figure 5 Schematic diagram of the circular saw blade structure according to the specific embodiment;

[0022] Figure 6 For Figure 5 the enlarged schematic diagram at A in

[0023] Description of the Reference Numerals:

[0024] 10. Substrate;

[0025] 20. Cutting head;

[0026] 201. Inner edge; 202. Outer edge; 203. Groove; 204. Outer matrix thin sheet; 205. Inner

[0027] matrix thin sheet;

[0028] d. Circumferential pitch;

[0029] α. Included angle;

[0030] h. Thickness of the cutting head. Detailed implementation manners

[0031] To describe in detail the technical content, structural features, achieved objectives and effects of the technical solution, the following is a detailed description in conjunction with specific embodiments and with reference to the accompanying drawings.

[0032] As used herein, the term "embodiment" means that the specific features, structures or characteristics described in connection with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing at various positions in the specification does not necessarily refer to the same embodiment, nor is it particularly limited to its independence or relevance to other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0033] Unless otherwise defined, the meanings of the technical terms used herein are the same as those commonly understood by those skilled in the technical field to which the present application belongs; the use of the relevant terms herein is only for describing specific embodiments and is not intended to limit the present application.

[0034] In the description of the present application, the phrase "and / or" is an expression used to describe the logical relationship between objects, indicating that there can be three relationships, for example, A and / or B, which means: there is A, there is B, and there is both A and B at the same time. In addition, the character " / " in this article generally represents an "or" logical relationship between the associated objects before and after.

[0035] In the present application, terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, primary or secondary, or order relationship between these entities or operations.

[0036] Without further limitation, in the present application, the use of the terms "including", "comprising", "having" or other similar expressions in a statement is intended to cover non-exclusive inclusion. These expressions do not exclude the possibility that there may be additional elements in the process, method or product including the said elements, so that a process, method or product including a series of elements may include not only those defined elements, but also other elements not explicitly listed, or elements inherent to such process, method or product.

[0037] Similar to the understanding in the "Patent Examination Guidelines", in this application, expressions such as "greater than", "less than", "exceeding", etc. are understood as not including the recited number; expressions such as "above", "below", "within", etc. are understood as including the recited number. In addition, in the description of the embodiments of this application, the meaning of "a plurality of" is two or more (including two), and similar expressions related to "many" are understood in the same way, such as "multiple groups", "multiple times", etc., unless otherwise specifically defined.

[0038] In the description of the embodiments of this application, the spatially related expressions used, such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "perpendicular", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the specific embodiment or the drawings, and is only for the convenience of describing the specific embodiments of this application or for the reader to understand, rather than indicating or implying 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, it should not be construed as a limitation on the embodiments of this application.

[0039] Unless otherwise clearly specified or limited, in the description of the embodiments of this application, the terms such as "installed", "connected", "joined", "fixed", "set", etc. should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two components or the interaction relationship between two components. For those skilled in the art to which this application pertains, the specific meanings of the above terms in the embodiments of this application can be understood according to specific circumstances.

[0040] See Figures 1-4 As shown, the present utility model provides a cutter head. The cutter head 20 is provided with a groove 203, and the groove 203 is recessed from the outer edge 202 towards the inner edge 201, so that when the cutter head cuts the workpiece to be cut, a large amount of powder chips generated during the cutting process can be present in the groove 203. The groove 203 is used as a chip removal channel, so that the powder chips in the groove 203 can be washed away in time, reducing the accumulation and pile-up of powder chips, avoiding blockage and jamming phenomena during the cutting process, and maintaining the sharpness of the outer edge 202 of the cutter head 20.

[0041] The workpiece to be cut can be a metal material, such as a workpiece made of metal materials like steel, aluminum, copper, iron, etc., which can be a sheet, a pipe, a profile, etc.; it can be a wood material, such as a workpiece made of wood like solid wood, artificial board, plywood, particle board, etc., which can be furniture, wood products, etc.; it can be a plastic, such as a workpiece made of plastic materials like polyethylene, polypropylene, polyvinyl chloride, etc., which can be plastic products, pipes, sheets, etc.; it can be a stone, such as a workpiece made of stone like marble, granite, gypsum, etc., which can be stone plates, stone carvings, etc. It can be glass, such as a workpiece made of glass materials like glass plates, glass bottles, etc. Of course, it can also be other materials, such as workpieces made of other materials like ceramics, paper, rubber, etc.

[0042] See Figure 1 As shown, the structure of a cutting head of the present utility model will be further elaborated below. It includes

[0043] The cutting head includes an inner edge 201 and an outer edge 202 with a cutting function;

[0044] The cutting head 20 also has a groove 203, and the groove 203 is formed by recessing from the outer edge 202 towards the inner edge 201 in the middle along the thickness h direction of the cutting head.

[0045] The above-mentioned cutting head 20 is used for cutting and can be formed by superhard alloy or sintered diamond. The above-mentioned outer edge 202 with a cutting function means that the outer edge 202 of the cutting head 20 can cut the workpiece to be cut; the outer edge 202 can adopt different shapes to make it have a cutting function. Its shape can be in the shape of a cutting head 20, serrated, etc. Among them, the serrated shape can adopt different shapes and sizes, such as straight teeth, inclined teeth, curved teeth, etc., to meet different cutting requirements.

[0046] The above-mentioned groove 203 can be linear, wavy, etc., and the shape of its cross-section can be V-shaped, U-shaped, rectangular, etc. The depth of the groove 203 can be greater than the width of the outer edge 202 (see Figure 4 shown), or it can be less than the width of the outer edge 202 (see Figure 3 shown). There are various ways to implement the groove 203. Usually, it can be achieved by mechanical cutting, chemical etching, laser etching, etc. In some embodiments, a groove 203 is opened in the middle of the formed cutting head 20 along the thickness direction of the cutting head 20 from the outer edge 202 towards the inner edge 201 direction, and the groove 203 is used as a chip removal channel, so that the powder chips in the groove 203 can be washed away in time, reducing the accumulation and pile-up of powder chips. In some embodiments, when the cutting head 20 is not formed, the groove 203 is provided so that the cutting head 20 has the groove 203 when it is formed. See Figures 2-4 As shown, in some embodiments, the cutting head 20 is at least formed by laminating three layers of matrix thin sheets; the length from the outer edge 202 to the inner edge of the inner matrix thin sheet 205 is less than that of the outer matrix thin sheet 204.

[0047] See Figures 2-4 As shown, taking the sintered diamond bit 20 as an example, the specific implementation manner will be further elaborated below. Each matrix thin slice is sintered and formed from matrix powder and diamond particles. In practice, the diamond particles can be consolidated on the matrix powder by cold pressing to make the matrix thin slice, and then the cold-pressed matrix thin slices are stacked layer by layer. When stacking, the multiple matrix thin slices are aligned along their respective inner edges 201, and at the same time, the matrix thin slice with a smaller length from the outer edge 202 to the inner edge 201 is located in the inner layer, and the matrix thin slice with a longer length from the outer edge 202 to the inner edge 201 is located in the outer layer. So that a groove 203 shape is formed after the multiple matrix thin slices are stacked. The stacked multiple matrix thin slices are placed in a sintering mold, and the stacked matrix thin slices are tightly combined by high-temperature and high-pressure sintering to form the bit 20 with the groove 203.

[0048] The performance of each matrix thin slice is affected by various factors, mainly including matrix powder, particle size, concentration, sintering temperature, and cutting parameters of diamond particles, etc. Specifically, when the bit 20 cuts, the diamond particles on the outer edge 202 of the bit 20 will continuously wear when cutting the workpiece to be cut, and at the same time, the matrix will also be consumed and worn to expose new diamonds, so that the diamond particles on the outer edge 202 of the bit 20 maintain a certain exposure height to ensure normal cutting. To ensure that the groove 203 on the outer edge 202 of the bit 20 still exists after cutting wear, the wear of the matrix powder of the inner matrix thin slice 205 can be greater than that of the outer matrix thin slice 204. That is, the inner matrix thin slice 205 uses matrix powder with faster wear, and the outer matrix thin slice 204 uses matrix powder with slower wear. When the bit is cutting, due to different wear resistances, the inner matrix thin slice 205 wears more than the outer matrix thin slice 204, so that it continues to be worn in order to facilitate the discharge of powder chips and heat and improve the cutting efficiency. Specifically, the matrix powder of the inner matrix thin slice 205 can include bronze powder; the matrix powder of the outer matrix thin slice 204 can include brass powder.

[0049] For a further improvement of the above embodiment, the volume fraction of diamond particles in the inner matrix thin slice 205 is less than that of the outer matrix thin slice 204. Using diamond particles with a small volume fraction in the inner matrix thin slice 205, that is, the proportion of diamond particles is small, can reduce the usage amount of diamond particles and help the inner matrix thin slice 205 to accelerate wear. Using diamond particles with a large volume fraction in the outer matrix thin slice 204, that is, the proportion of diamond particles is large, slows down the wear of the outer matrix thin slice 204 and at the same time ensures that the outer edge 202 of the bit 20 can cut the plate normally.

[0050] See Figures 5-6As shown, the present utility model further provides a circular saw blade, which applies the above-mentioned cutting head and includes a base body 10 and a cutting head 20. The cutting head 20 is connected to the base body 10, and the cutting head 20 rotates around the axis of the center of the base body 10, so that the outer edge 202 of the cutting head 20 with a cutting function cuts the workpiece to be cut. During the cutting operation of the circular saw blade, a large amount of powder chips can be generated during the cutting process and can be stored in the groove 203 of the cutting head. The groove 203 of the cutting head is used as a chip removal channel, so that the powder chips in the groove 203 can be flushed away in time, reducing the accumulation and buildup of powder chips, avoiding clogging and jamming during the cutting process, maintaining the sharpness of the outer edge 202 of the cutting head 20, and thus maintaining the cutting efficiency of the circular saw blade.

[0051] The following further elaborates on the structure of a cutting head of the present utility model. It includes

[0052] a base body 10, and the base body 10 is in a disc shape;

[0053] a plurality of cutting heads 20, and the inner edge 201 of the cutting head 20 is connected to the outer periphery of the base body 10.

[0054] The above connection is the connection between the base body 10 and the cutting head 20. It can be a direct connection in which the base body 10 and the cutting head 20 are integrally formed, or the base body 10 and the cutting head 20 are formed separately, and the base body 10 and the cutting head 20 are connected by joining. The joining is the joining of the inner edge 201 of the cutting head 20 and the outer periphery of the base body 10, so that the cutting head 20 can rotate together with the base body 10, that is, the cutting head 20 rotates around the axis of the center of the base body 10 to cut the workpiece to be cut. The joining of the inner edge 201 of the cutting head 20 and the outer periphery of the base body 10 can be achieved by welding or other firm connection methods. In the connection between the cutting head 20 and the base body 10, it is preferred that the center points in the thickness direction of the cutting head 20 and the center points in the thickness direction of the base body 10 are on the same horizontal plane, so that the circular saw blade can maintain stability during high-speed rotation, reducing noise and wear caused by imbalance. On this basis, the thickness h of the cutting head can be different from the thickness of the base body 10. In some embodiments, the thickness h of the cutting head is greater than the thickness of the base body 10, and at this time, the two surfaces of the cutting head 20 can be higher than the two surfaces of the base body 10; in some embodiments, the thickness h of the cutting head is less than the thickness of the base body 10, and at this time, the two surfaces of the cutting head 20 can be lower than the two surfaces of the base body 10; in some embodiments, the thickness h of the cutting head is equal to the thickness of the base body 10, and at this time, the two surfaces of the cutting head 20 are flush with the two surfaces of the base body 10. The same thickness of the cutting head 20 and the base body 10 helps to reduce vibration and shaking caused by inconsistent thickness, thereby improving the overall stability of the saw blade and ensuring the accuracy and efficiency of cutting.

[0055] A plurality of cutting heads 20 are connected to the outer periphery of the base body 10 through the outer edge 202. The plurality of cutting heads 20 can be closely arranged and connected to the outer periphery of the base body 10; they can also be spaced apart and connected to the outer periphery of the base body 10, that is, there is a circumferential pitch d between adjacent cutting heads 20 on the outer periphery of the base body 10. The circumferential pitch d between adjacent cutting heads 20 can increase the cutting channel, making it easier for chips to be discharged from the cutting area, reducing blockage and heat accumulation during cutting, thereby improving cutting efficiency and machining speed; at the same time, reducing the vibration and resonance between the cutting heads 20 during cutting, thereby reducing the vibration and noise generated during cutting.

[0056] The circumferential pitches of the adjacent cutting heads 20 on the outer periphery of the base body 10 can be different, that is, the plurality of cutting heads 20 are not equally distributed along the outer periphery of the base body 10; the circumferential pitches d of the adjacent cutting heads 20 on the outer periphery of the base body 10 can also be the same, that is, the plurality of cutting heads 20 are equally distributed along the outer periphery of the base body 10, so that the cutting force is more evenly distributed on the entire base body 10, so that the cutting force can be evenly transmitted to the base body 10, reducing the vibration and deviation of the base body 10 caused by uneven cutting force; at the same time, making the cutting heads 20 contact the workpiece more evenly during cutting, reducing the concentration and uneven distribution of the cutting force, and improving cutting stability.

[0057] In order to make the cutting head 20 cut into the workpiece more easily, an angle α is formed between the tangent line at the connection between the side edge of each cutting head 20 and the outer periphery of the base body 10, and the angle α is 30°-60°. That is, the cutting head 20 is inclined and arranged on the outer periphery of the base body 10, which can reduce the friction and resistance during cutting, reduce the magnitude of the cutting force, so that the cutting head 20 can cut into the workpiece more easily, reducing the cutting force and energy consumption. Specifically, the angle α can be set to 45°, which can also reduce the swing of the circular saw blade, reduce the cutting noise, and improve the cutting stability.

[0058] It should be noted that although the above embodiments have been described in this article, the patent protection scope of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, the changes and modifications made to the embodiments described in this article, or the equivalent structural or equivalent process transformations made by using the content of the specification and drawings of the present invention, directly or indirectly applying the above technical solutions to other related technical fields, are all included in the patent protection scope of the present invention.

Claims

1. A cutter head, characterized in that, The cutting head includes an inner edge and an outer edge with a cutting function; the cutting head further has a groove, which is formed by recessing from the outer edge to the inner edge in the middle along the thickness direction of the cutting head; the cutting head is formed by laminating at least three layers of matrix thin sheets; the length of the outer edge to the inner edge of the inner matrix thin sheet is less than that of the outer matrix thin sheet, and the wear of the matrix powder of the inner matrix thin sheet is greater than that of the outer matrix thin sheet.

2. The cutting head according to claim 1, wherein, The outer edge is serrated.

3. The cutter head according to claim 1, characterized in that Each matrix thin sheet is sintered and formed by including matrix powder and diamond particles.

4. The cutting head according to claim 3, characterized in that, The wear of the matrix powder of the inner matrix thin sheet is greater than that of the outer matrix thin sheet.

5. The cutting head according to claim 4, characterized in that The matrix powder of the inner matrix thin sheet includes bronze powder; the matrix powder of the outer matrix thin sheet includes brass powder.

6. A circular saw blade, applying the cutting head according to any one of claims 1-5, characterized in that, Including a matrix, the matrix is in a disc shape; a plurality of cutting heads, the inner edges of the cutting heads are connected to the outer periphery of the matrix.

7. The circular saw blade according to claim 6, wherein Adjacent cutting heads have a circumferential pitch on the outer periphery of the matrix.

8. The circular saw blade according to claim 6, characterized in that, The tangent line at the connection between the side of each cutting head and the outer periphery of the matrix forms an angle, and the angle is 30°-60°.

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