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 a plurality of outer edges with a cutting function, by the adoption of the technology, a multi-layer cutting face can be formed, in the cutting process, a cut part can be cut by the outer edges of different heights at the same time, cutting seams of the cut part are gradually enlarged, the cutting seams are smoother, vibration can be reduced in the cutting process, cutting is more stable, and the cutting efficiency is improved. The reciprocating frequency required by single cutting is reduced, so that the cutting efficiency and speed are obviously improved; meanwhile, the cut material can be smoothly separated from the cutter face when making contact with the step, so that a cut part is prevented from being attached to the cutter face, and the cutting continuity and efficiency are improved; in addition, due to the step-shaped design, cutting force is dispersed to a plurality of steps, the outer edge of each step bears a certain cutting load, fatigue cracks and damage caused by stress concentration are reduced, and the durability of the cutter is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to cutting technology field especially, it relates to a tool bit and circular saw blade. BACKGROUND

[0002] The circular saw blade has a disc-shaped base body and a plurality of tool bits joined to the outer periphery of the base body. The tool bits are made of, for example, superhard alloy or sintered diamond. By rotating the circular saw blade around an axis passing through the center of the disc-shaped base body, the outer edges (cutting edges) of the cutting tool bits perform cutting on a workpiece. The plurality of cutting tool bits intermittently cut the workpiece, and the workpiece can be cut off using the circular saw blade.

[0003] In the existing circular saw blade, especially during sintered diamond cutting operation, a large amount of dust and heat is generated during cutting, and cooling water is needed to flush the tool bit to remove the dust on its surface and remove the heat. Referring to the authorized patent CN112453412 B, a sintered diamond circular saw blade processing technology, which is a single outer edge cutting the cut piece, a large amount of dust and heat is generated during cutting, a large amount of dust is accumulated on the outer edge and the tool face of the tool bit, the cut piece is adhered to the tool face, causing blockage and tool jamming phenomenon, which requires continuous reciprocating cutting, making the cutting lack of continuity, and the cutting efficiency and speed are greatly reduced; in addition, the single outer edge is overloaded during cutting, which causes fatigue cracks and damage due to stress concentration, and further causes local excessive wear of the tool, which reduces the service life of the tool; at the same time, the friction and impact between the outer edge of the tool bit and the surface of the marble plate during cutting will generate a lot of noise, which greatly reduces the use experience of the saw blade. SUMMARY

[0004] Therefore, it is necessary to provide a tool bit to solve the above problems.

[0005] To achieve the above purpose, the utility model provides a kind of tool bit, the tool bit includes inner edge and several outer edges with cutting function;Several outer edges are distributed in stepped form.

[0006] Further, the tool bit has several outer edges on both sides, and the several outer edges on each side of the tool bit are distributed in stepped form respectively.

[0007] Further, the several outer edges on both sides of the tool bit are symmetrically arranged along the tool bit.

[0008] Further, an inclined transition surface is provided between adjacent outer edges.

[0009] Further, one side of the several outer edges in the same stepped distribution is in continuous arc shape, so that one side of the tool bit is in arc shape.

[0010] Further, the other side edge of the outer edge in the same step-shaped distribution is continuously inclined, so that the other side edge of the tool bit is inclined.

[0011] A circular saw blade using the tool bit described above, comprising

[0012] a base body in a disc shape;

[0013] a plurality of tool bits, the inner edges of the tool bits being connected to the outer periphery of the base body.

[0014] Further, adjacent tool bits have a circumferential pitch on the outer periphery of the base body.

[0015] Different from the prior art, the tool bit part of the above technical solution adopts a step-shaped design, the step-shaped distribution of the outer edge can form multiple levels of cutting surfaces, so that the workpiece being cut can be cut by different height outer edges at the same time during cutting, gradually expanding the kerf of the workpiece being cut, making the kerf more flat, reducing vibration during cutting, cutting more stable, reducing the number of reciprocations required for single cutting, thereby significantly improving the efficiency and speed of cutting; at the same time, the cut material can smoothly separate from the tool face when it contacts the step, thereby avoiding the adhesion of the workpiece being cut on the tool face, improving the continuity and efficiency of cutting; in addition, the step-shaped design disperses the cutting force to multiple steps, so that each step outer edge bears a certain cutting load, the pressure borne by the tool bit during processing is more uniform, reducing the excessive load on a single outer edge, reducing fatigue cracks and damage caused by stress concentration, thereby reducing the situation of local excessive wear of the tool, improving the durability of the tool. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A structural schematic diagram of the tool bit of the embodiment;

[0017] Figure 2 A structural schematic diagram of the tool bit of the embodiment;

[0018] Figure 3 A Figure 2 a sectional view at B-B;

[0019] Figure 4 A structural schematic diagram of the tool bit of the embodiment;

[0020] Figure 5 A structural schematic diagram of the circular saw blade of the embodiment;

[0021] Figure 6 A Figure 5 an enlarged schematic view at A.

[0022] BRIEF DESCRIPTION OF REFERENCE NUMERALS:

[0023] 10, tool bit;

[0024] 101 inner edge; 102 outer edge; 103 transition surface; 104 one side edge of the tool head; 105 the other side edge of the tool head;

[0025] 20 base body;

[0026] D pitch;

[0027] d distance between the two sides of the tool head;

[0028] e direction of the middle part of the tool head. DETAILED DESCRIPTION

[0029] To describe the technical contents, structural features, purposes and effects of the technical solutions in detail, the following will be described in detail in combination with specific embodiments and the accompanying drawings.

[0030] In this document, the term "embodiment" means that the specific features, structures or characteristics described in connection with the embodiment can be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, and does not particularly limit the independence or association between other embodiments. In principle, in this application, as long as there is no technical contradiction or conflict, each technical feature mentioned in each embodiment can be combined in any way to form a corresponding implementable technical solution.

[0031] Unless otherwise defined, the meanings of the technical terms used in this document are the same as those commonly understood by those skilled in the art to which the present application belongs; the use of related terms in this document is only for the purpose of describing specific embodiments, and is not intended to limit the present application.

[0032] In the description of the present application, the phrase "and / or" is a description of the logical relationship between the objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this document generally represents that the associated objects before and after are a "or" logical relationship.

[0033] In this application, such as "first" and "second", the terms 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 and secondary or order relationship between the entities or operations.

[0034] In the present application, the terms "comprise", "contain", "have", or other similar phrases as used in a clause are intended to encompass non-exclusive inclusion, and these phrases do not exclude the possibility that additional elements can be present in the process, method or product comprising the stated elements, so that the process, method or product comprising a series of elements can not only include those defined elements, but also include other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0035] In the present application, the terms "comprise", "contain", "have", or other similar phrases as used in a clause are intended to encompass non-exclusive inclusion, and these phrases do not exclude the possibility that additional elements can be present in the process, method or product comprising the stated elements, so that the process, method or product comprising a series of elements can not only include those defined elements, but also include other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0036] In the description of the embodiments of the present application, the spatial-related terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "perpendicular", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are indicated by the orientation or position relationship shown in the specific embodiments or the drawings, and are only for the convenience of describing the specific embodiments of the present application or for the reader to understand, and are not intended to indicate or imply that the indicated device or component must have a particular position, a particular orientation, or be constructed or operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0037] Unless otherwise explicitly specified or limited, in the description of the embodiments of the present application, the terms "mount", "connect", "connect", "fix", "set", etc. should be understood in a broad sense. For example, the "connection" can be fixed connection, or detachable connection, or integral setting; it can be mechanical connection, or electrical connection, or communication connection; it can be direct connection, or indirect connection through intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art to which the present application belongs, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0038] Reference is made to Figures 1-4As shown, the utility model provides a tool bit 10, optimization tool bit 10 shape, tool bit 10 part adopts the design of step shape, and the outer edge 102 of step shape distribution can form multilevel cutting surface, so that in cutting process, the workpiece can be cut by different height outer edge 102 simultaneously, gradually expand the cutting seam of workpiece, make cutting seam more even, can reduce vibration when cutting, and cutting is more stable, reduce the reciprocating number required for single cutting, thereby significantly improve the efficiency and speed of cutting, simultaneously make the material cut off can smoothly separate tool face when contacting step, thereby avoid the adhesion of workpiece on tool face, improve the continuity and efficiency of cutting, in addition, the cutting force of step shape design is dispersed to multiple steps, so that each step outer edge 102 bears certain cutting load, and the pressure borne by tool bit 10 in the processing process is more uniform, reduces the excessive load of single outer edge 102, reduces the fatigue cracks and damage caused by stress concentration, and then reduces the situation of local excessive wear of tool, improves the durability of tool.

[0039] Referring to Figures 1-3 As shown, the utility model provides an embodiment of tool bit 10, specifically, the tool bit 10 includes inner edge 101 and a plurality of outer edges 102 with cutting function, and the plurality of outer edges 102 are distributed in step shape.

[0040] The tool bit 10 is used for cutting and can be superhard alloy or sintered diamond formation. The outer edge 102 with cutting function refers to the outer edge 102 of the tool bit 10, which can cut the workpiece. The outer edge 102 can adopt different shapes to have cutting function. The shape can be tool bit 10 shape, sawtooth shape, etc. The sawtooth shape can adopt different shapes and sizes, such as straight tooth shape, oblique tooth shape, curved tooth shape, etc. to adapt to different cutting requirements.

[0041] The plurality of outer edges 102 are distributed in step shape. One side of the tool bit 10 can have a plurality of outer edges 102, and the plurality of outer edges 102 are distributed in step shape (see Figure 1 As shown). The tool bit 10 can have a plurality of outer edges 102 on both sides, and the plurality of outer edges 102 on each side of the tool bit 10 are distributed in step shape (see Figure 2 As shown). The tool bit 10 has outer edges 102 distributed in step shape on both sides, which has obvious advantages in cutting efficiency, tool life, operation convenience and safety, applicability and flexibility, etc.

[0042] The number of outer edges 102 on both sides of the tool bit 10 is not limited, and the number of outer edges 102 can be the same or different. The plurality of outer edges 102 on both sides of the tool bit 10 can be arranged symmetrically along the tool bit 10 (see Figures 2-3The outer edges 102 can also be asymmetrically arranged. Preferably, several outer edges 102 on both sides of the tool head 10 are symmetrically arranged along the tool head 10. The above-mentioned symmetric arrangement along the tool head 10 refers to symmetry along the direction e of the middle of the tool head (the middle of the distance d between the two sides of the tool head). That is, the cross section of the tool head 10 is in the shape of a convex letter. Since the outer edges 102 are symmetrically arranged along the tool head 10 and are distributed in a stepped manner, such a structure helps to maintain stability and balance during cutting. The symmetric design reduces deviation caused by uneven force, better balances cutting force during machining, reduces impact and vibration during cutting, makes the cutting process smoother, reduces cutting resistance, and improves cutting efficiency. In some embodiments, the tool head 10 is specifically divided into two symmetrically arranged tool blanks, and the two tool blanks have the same structure and shape. The tool blanks can be made by consolidating synthetic diamond particles on metal powder, and the tool blanks are respectively pressed and formed using a stepped tool head 10 mold. The two tool blanks are assembled and placed in a sintering mold, and the left and right tool blanks are tightly combined by high-temperature sintering to form a tool head 10 with outer edges 102 distributed in a stepped manner on both sides.

[0043] The distance between the outer edges 102 on both sides of the tool head 10 is not limited here. The distance between the several outer edges 102 can be fixed, or the distance between the outer edges 102 can vary, which can gradually decrease or increase as the step decreases.

[0044] Referring to Figure 4 On the basis of the above-mentioned embodiments, an inclined transition surface 103 can be provided between adjacent outer edges 102. The inclined transition surface 103 makes the transition between adjacent outer edges 102 smoother, reduces the pause and adjustment time during machining, realizes continuous machining, and at the same time provides better support and stability for adjacent outer edges. The inclination angle of the transition surface 103 is not limited here.

[0045] In addition, a chip removal groove can be provided between the adjacent outer edges 102. A large amount of chips generated during the cutting process can be present in the chip removal groove of the tool bit 10. The chip removal groove of the tool bit 10 can be used as a chip removal channel to timely flush away the chips in the chip removal groove, reduce the accumulation of the chips, and avoid the blockage and tool jamming during the cutting process, so as to maintain the sharpness of the outer edges 102 of the tool bit 10 and further maintain the cutting efficiency of the circular saw blade. The chip removal groove is recessed from the outer edges 102 to the inner edges 101 along the thickness direction of the tool bit 10. The chip removal groove can be linear or wavy, and the cross-sectional shape thereof can be V-shaped, arc-shaped, or rectangular. The chip removal groove can be formed by mechanical cutting, chemical etching, or laser etching. In some embodiments, the chip removal groove is formed in the middle of the tool bit 10 along the thickness direction of the tool bit 10 between the adjacent outer edges 102 of the tool bit 10. The chip removal groove can be used as a chip removal channel to timely flush away the chips in the chip removal groove, reduce the accumulation of the chips, and avoid the blockage and tool jamming during the cutting process. In some embodiments, the chip removal groove is formed when the tool bit 10 is formed.

[0046] Referring to Figure 4 As shown in FIG. 10, in order to make the tool bit 10 more easily cut into the workpiece, the side edge 104 of the tool bit can be arc-shaped. The side edge 104 of the tool bit refers to the cutting edge of the tool bit 10 that cuts into the workpiece. That is, the side edge of each of the outer edges 102 arranged in the stepped manner is continuously arc-shaped, so that the side edge 104 of the tool bit is arc-shaped. The arc-shaped side edge 104 of the tool bit helps to form a smoother cutting path during the cutting process, reduces the resistance and friction generated during the cutting process, and thus improves the cutting efficiency. At the same time, the resistance and vibration during the cutting process can be reduced, the cutting noise can be reduced, the cutting process can be more stable, and the cutting efficiency can be further improved. In addition, the cutting angle can be naturally adjusted during the cutting process, the cutting surface can be more smoothly transitioned, the cutting force distribution can be more uniform, the cutting marks and burrs can be reduced, and the smoothness and quality of the machined surface can be improved.

[0047] Of course, the other side edge of each of the outer edges 102 arranged in the stepped manner can also be continuously inclined, so that the other side edge 105 of the tool bit is inclined. The inclination direction of the other side edge 105 of the tool bit is the same as the tangent direction of the side edge 104 of the tool bit. The inclination of the other side edge 105 of the tool bit helps to disperse the stress generated during the cutting process, avoids the stress concentration in a certain part of the tool, and thus reduces the wear and damage of the tool.

[0048] Referring to Figures 5-6The utility model also provides a circular saw blade, application above-mentioned tool bit 10, including base body 20 and tool bit 10, tool bit 10 is connected on base body 20, make tool bit 10 with the rotation of the axle of the center of base body 20, to make tool bit 10 have the cutting function's outer edge 102 to the cutting of the cutting member.

[0049] The structure of the tool bit 10 of the utility model is further described below. The tool bit 10 includes

[0050] The base body 20 is in the form of a disc;

[0051] The tool bit 10 is connected to the outer periphery of the base body 20.

[0052] The connection between the base body 20 and the tool bit 10 can be a direct connection in which the base body 20 and the tool bit 10 are integrally formed, or the base body 20 and the tool bit 10 can be separately formed, and the base body 20 and the tool bit 10 are connected through engagement. The engagement is between the inner edge 101 of the tool bit 10 and the outer periphery of the base body 20, so that the tool bit 10 can rotate together with the base body 20, i.e., the tool bit 10 rotates around the center axis of the base body 20 to cut the cutting member; the engagement between the inner edge 101 of the tool bit 10 and the outer periphery of the base body 20 can be achieved through welding or other secure connection methods. In the connection between the tool bit 10 and the base body 20, the center points of the thickness directions of the tool bit 10 and the base body 20 are preferably on the same horizontal plane, so that the circular saw blade can remain stable during high-speed rotation and reduce noise and wear caused by imbalance. On this basis, the thickness of the tool bit 10 can be different from the thickness of the base body 20. In some embodiments, the thickness of the tool bit 10 is greater than the thickness of the base body 20, in which case the two surfaces of the tool bit 10 can be higher than the two surfaces of the base body 20; in some embodiments, the thickness of the tool bit 10 is less than the thickness of the base body 20, in which case the two surfaces of the tool bit 10 can be lower than the two surfaces of the base body 20; in some embodiments, the thickness of the tool bit 10 is equal to the thickness of the base body 20, in which case the two surfaces of the tool bit 10 are flush with the two surfaces of the base body 20, and the thickness of the tool bit 10 is consistent with the thickness of the base body 20, which 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.

[0053] The plurality of cutting heads 10 are connected to the outer periphery of the base body 20 by the outer edge 102. The plurality of cutting heads 10 can be closely arranged and connected to the outer periphery of the base body 20; or can be spaced and connected to the outer periphery of the base body 20, that is, adjacent cutting heads 10 have a circumferential pitch D on the outer periphery of the base body 20. The circumferential pitch D between adjacent cutting heads 10 can increase the cutting channel, making it easier for chips to be discharged from the cutting area, reducing clogging and heat accumulation during cutting, thereby improving cutting efficiency and processing speed; at the same time, reducing vibration and resonance between the cutting heads 10 during cutting, thereby reducing vibration and noise generated during cutting.

[0054] The circumferential pitch of the adjacent cutting heads 10 on the outer periphery of the base body 20 can not be the same, that is, the plurality of cutting heads 10 are not equally distributed along the outer periphery of the base body 20; the circumferential pitch D of the adjacent cutting heads 10 on the outer periphery of the base body 20 can also be the same, that is, the plurality of cutting heads 10 are equally distributed along the outer periphery of the base body 20, so that the cutting force is more evenly distributed on the entire base body 20, so that the cutting force can be uniformly transmitted to the base body 20, reducing vibration and deviation of the base body 20 caused by uneven cutting force; at the same time, the cutting heads 10 more evenly contact the workpiece during cutting, reducing the concentration and uneven distribution of cutting force, improving cutting stability.

[0055] It should be noted that although the above embodiments have been described in this paper, the patent protection scope of the utility model is not limited thereby. Therefore, based on the innovative concept of the utility model, the changes and modifications of the embodiments described in this paper, or the equivalent structure or equivalent process transformation made by using the contents of the utility model specification and drawings, directly or indirectly apply the above technical solutions to other related technical fields, are all included in the protection scope of the utility model patent.

Claims

1. A cutting head, characterized in that, The cutting head includes an inner edge and several outer edges with cutting functions; the several outer edges are distributed in a stepped manner, and the thickness of the outer edges gradually decreases from the side adjacent to the inner edge to the side away from the inner edge, so as to gradually expand the kerf of the workpiece being cut.

2. The cutting head according to claim 1, characterized in that, The cutter head has several outer edges on both sides, and each of the several outer edges on each side of the cutter head is distributed in a stepped shape.

3. The cutting head according to claim 2, characterized in that, Several outer edges located on both sides of the cutter head are symmetrically arranged along the cutter head.

4. The cutting head according to claim 2, characterized in that, An inclined transition surface is provided between adjacent outer edges.

5. The cutting head according to claim 1, characterized in that, The outer edges of several of the outer edges, which are distributed in the same step-like manner, are in a continuous arc shape on one side, so that one side of the cutter head is arc-shaped.

6. The cutting head according to claim 5, characterized in that, The other side of several outer edges located in the same stepped distribution is continuously inclined, so that the other side of the cutter head is inclined.

7. A circular saw blade, using the cutting head described in any one of claims 1-6, characterized in that, include The substrate is disk-shaped; Multiple cutting heads, the inner edges of which are connected to the outer periphery of the substrate.

8. The circular saw blade according to claim 7, characterized in that, The adjacent cutting heads have a circumferential pitch on the outer periphery of the substrate.

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