Diamond tool bit and saw blade

Abstract

The utility model discloses a diamond tool bit and a saw blade. The diamond tool bit comprises a plurality of diamond blade layers and a plurality of iron sheet layers, the outer edge of each diamond blade layer is provided with diamond particles for cutting; the diamond blade is characterized in that the diamond blade layers are arranged in a stacked mode, one iron sheet layer is arranged between every two adjacent diamond blade layers, and diamonds are brazed on the faces, corresponding to the diamond blade layers, of the iron sheet layers; by adopting the technical scheme, the original smooth surface of the iron sheet layer becomes rough, so that the physical contact area between the diamond blade layer and the iron sheet layer is effectively increased, and more importantly, the roughening treatment greatly enhances the mechanical locking effect between the diamond blade layer and the iron sheet layer, so that the combination degree of the diamond blade layer and the iron sheet layer is enhanced, and the service life of the diamond blade layer and the iron sheet layer is prolonged. Even if the tool bit bears high-strength and high-frequency cutting operation, the tool bit can keep extremely high structural integrity and use stability, and the service life of the tool bit is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cutting, in particular to a diamond tool bit and a saw blade. BACKGROUND

[0002] The diamond tool bit cutting technology, as a field with great potential in the domestic and foreign market, continues to show its undeniable industry prospects and stable growth trend. The core value of this technology lies in its wide range of application scenarios, especially in stone processing, construction, and high-end manufacturing industries. Diamond tool bits, with their excellent hardness and wear resistance, have become the preferred tool for cutting operations. The production process of diamond tool bits includes raw material preparation (including matrix powder and diamond), uniformly mixing and cold pressing the raw materials into diamond blade layers, and then sequentially stacking the cold blanks of the diamond blade layers and the iron sheet layers to sinter and form (if there is no iron sheet layer, the diamond blade layer is easy to scatter during sintering, and the formed tool bit is too brittle to complete the cutting operation). Finally, after grinding and sandblasting, the tool bit finished product is obtained.

[0003] However, in the tool bit production process, the sintering of the cold blanks of the diamond blade layers and the iron sheet layers is a key link in the production process and one of the technical challenges. Referring to Figure 1 As the iron sheet layer serves as a non-working layer, it has a smooth surface, and its bonding strength with the diamond blade layer is often low. The existing technology usually cold-presses the diamond blade layer to form a cold blank, then stacks it with the iron sheet layer and forms it by hot pressing sintering. The hot pressing sintering enhances the bonding force between the diamond blade layer and the iron sheet layer. However, the production efficiency of this process is relatively low, and the number of tool bits sintered at a time is limited, accompanied by a large amount of power consumption. More importantly, the high-temperature environment in the sintering process can easily cause oxidation of the tool bit material, thereby affecting its final performance and service life. If pressureless sintering is used, the bonding strength between the cold blank of the diamond blade layer and the iron sheet layer is often low. Therefore, how to reduce production costs and improve production efficiency without sacrificing tool bit quality is the current focus. CONTENT OF THE UTILITY MODEL

[0004] In view of the above problems, the present application provides a diamond tool bit to solve the problem of low bonding strength between the cold blank of the existing diamond blade layer and the iron sheet layer.

[0005] To achieve the above-mentioned purpose, the inventors provide a diamond tool bit, which comprises a plurality of diamond blade layers and iron sheet layers; each diamond blade layer has diamond particles on the outer edge for cutting; a plurality of diamond blade layers are stacked, and an iron sheet layer is arranged between adjacent diamond blade layers, and the iron sheet layer is brazed with diamonds on the surface corresponding to the diamond blade layer.

[0006] Further, the diamond blade layer is formed by mixing and cold-pressing the matrix powder and the diamond particles.

[0007] Further, the outer edge of the iron sheet layer is brazed with diamonds.

[0008] Further, the iron sheet layer is brazed with 40 / 45 size diamonds.

[0009] Further, the iron sheet layer has at least three pieces, and the concentration of diamonds brazed on the outer edge of the inner iron sheet layer is less than that of the outer iron sheet layer.

[0010] Further, the concentration of diamonds brazed on the outer edge of the inner iron sheet layer ranges from 22-28%, and the concentration of diamonds brazed on the outer edge of the outer iron sheet layer ranges from 32-38%.

[0011] Further, the diamond blade head is formed by cold-pressing the materials in the order of the diamond blade layers and the iron sheet layers, and then sintering without pressure.

[0012] Further, during the stacking, the outer edge of the iron sheet layer corresponds to the outer edge of the diamond blade layer.

[0013] Further, during the stacking, the projection of the outer edge of the iron sheet layer in the height direction is in the diamond blade layer, so that the outer edges of adjacent diamond blade layers have a groove recessed from the outer edge to the inner edge.

[0014] A saw blade using the diamond blade head described above.

[0015] Unlike the prior art, the technical solution described above brazes diamonds on the surface of the iron sheet layer corresponding to the diamond blade layer. Through the coating and penetration of the molten metal liquid at high temperature during the brazing process, the metallurgical bonding between the diamond particles and the iron sheet layer is promoted, making the bonding interface more secure. The originally smooth surface of the iron sheet layer becomes rough, effectively increasing the physical contact area between the diamond blade layer and the iron sheet layer. More importantly, this roughening process greatly enhances the mechanical locking effect between the two, to strengthen the bonding degree of the diamond blade layer and the iron sheet layer, ensuring that even under high-strength and high-frequency cutting operations, the blade head can maintain extremely high structural integrity and use stability, prolonging the service life of the blade head.

[0016] The above content related to the description of the utility model is only a summary of the technical scheme of the present application. In order to enable those skilled in the art to more clearly understand the technical scheme of the present application, and then can be implemented according to the content recorded in the specification and drawings, and in order to let the above-mentioned purpose and other purposes, characteristics and advantages of the present application can be more easily understood, the following is described in conjunction with the specific embodiments of the present application and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings are only used to show the principles, implementation manners, applications, characteristics and effects of the specific embodiments of the utility model and other related contents, and cannot be considered as a limitation of the present application.

[0018] In the drawings of the specification:

[0019] Figure 1 The schematic diagram of the diamond tool bit structure is described for the background technology;

[0020] Figure 2 The schematic diagram of the iron sheet layer structure is described for the embodiment manner;

[0021] Figure 3 The schematic diagram of the diamond tool bit structure is described for the embodiment manner;

[0022] Figure 4 The schematic diagram of the iron sheet layer structure is described for the embodiment manner;

[0023] Figure 5 The schematic diagram of the diamond tool bit structure is described for the embodiment manner.

[0024] The reference signs involved in the above drawings are explained as follows:

[0025] 10, diamond tool sheet layer;

[0026] 101, outer edge of the diamond tool sheet layer;

[0027] 20, iron sheet layer;

[0028] 201, outer edge of the iron sheet layer; 202, diamond particle;

[0029] 30, groove. DETAILED DESCRIPTION

[0030] In order to explain the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved of the present application in detail, the following is described in conjunction with the specific embodiments listed and the accompanying drawings. The embodiments recorded in this paper are only used to more clearly explain the technical scheme of the present application, therefore only as an example, and cannot limit the protection scope of the present application.

[0031] The term "embodiment" is mentioned herein 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, nor does it particularly limit the independence or association between other embodiments. In principle, in the present 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.

[0032] Unless otherwise defined, the meanings of the technical terms used herein are the same as those commonly understood by those skilled in the art to which the present application belongs; the use of related terms herein is only for the purpose of describing specific embodiments, and is not intended to limit the present application.

[0033] 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 " / " herein generally represents that the associated objects before and after are a "or" logical relationship.

[0034] In the present application, the 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 and secondary or order relationship between the entities or operations.

[0035] In the present application, without more limitation, the "includes", "contains", "has" or other similar open expressions used in the sentence are intended to cover non-exclusive inclusion, and these expressions do not exclude the presence of other elements in the process, method or product including the described elements, so that the process, method or product including a series of elements can not only include those limited elements, but also include other elements not explicitly listed, or also include the elements inherent to such process, method or product.

[0036] As the same as the understanding in the "Guidelines for Examination", in the present application, the expressions such as "greater than", "less than", "exceed" are understood as not including the number; the expressions such as "above", "below", "within" are understood as including the number. In addition, in the description of the embodiments of the present application, the meaning of "multiple" is more than two (including two), and similar expressions related to "multiple" are also understood in this way, for example, "multiple groups", "multiple times", etc., unless otherwise explicitly limited.

[0037] In the description of the embodiments of the present application, the spatially relative terms, such as "central", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship shown in the specific embodiment or the accompanying drawings, and are only used to facilitate the description of the specific embodiment of the present application or to facilitate the understanding of the reader, and do not 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.

[0038] Unless otherwise expressly specified or limited, the terms "mount", "connect", "connection", "fixed", "set", and the like used in the description of the embodiments of the present application should be interpreted broadly. For example, the "connection" can be a fixed connection, or a detachable connection, or an integral setting; it can be directly connected, or indirectly connected through an intermediate medium; it can be a relationship in which two components are combined together, or a relationship in which two components interact with each other, or a communication within two structures. 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.

[0039] Referring to Figures 2-4 As shown, a diamond tool bit includes a plurality of diamond blade layers 10 and iron sheet layers 20; mainly on the surface of the iron sheet layer 20 corresponding to the diamond blade layer 10, diamond is brazed; through the coating and penetration of the high-temperature molten metal liquid to the diamond particles 202 in the brazing process, the metallurgical bonding between the diamond particles 202 and the iron sheet layer 20 is promoted, so that the bonding interface is more firm, and the originally smooth surface of the iron sheet layer 20 becomes rough, thereby effectively increasing the physical contact area between the diamond blade layer 10 and the iron sheet layer 20, and more importantly, the roughening treatment greatly enhances the mechanical locking effect between the two, to strengthen the bonding degree of the diamond blade layer 10 and the iron sheet layer 20, and ensure that the tool bit can maintain high structural integrity and use stability even under high-strength and high-frequency cutting operation, thereby prolonging the service life of the tool bit.

[0040] In combination Figures 2-4 , the present application provides an embodiment of a diamond tool bit. The diamond tool bit includes a plurality of diamond blade layers 10 and iron sheet layers 20; each diamond blade layer has diamond particles 202 on the outer edge 101 for cutting; a plurality of the diamond blade layers 10 are stacked, and an iron sheet layer 20 is arranged between adjacent diamond blade layers 10, and diamond is brazed on the surface of the iron sheet layer 20 corresponding to the diamond blade layer 10.

[0041] The diamond blade layer 10 described above can be coated with diamond particles so that the outer edge 101 of the diamond blade layer has diamond particles for cutting. The diamond blade layer 10 described above can also be formed by mixing the matrix powder and diamond particles and cold pressing so that the outer edge 101 of the diamond blade layer has diamond particles for cutting, and the diamond particles 202 on the surface of the iron sheet layer 20 can penetrate and tightly embed into the matrix powder of the diamond blade layer 10, and combine with the matrix powder of the diamond blade layer 10, greatly improving the bonding strength between the diamond blade layer 10 and the iron sheet layer 20. At the same time, the diamond particles will continue to be exposed and renewed during the cutting process, maintaining the sharpness of the outer edge of the diamond blade layer 10 and improving the cutting efficiency and quality.

[0042] The iron sheet layer 20 described above is arranged between adjacent diamond blade layers 10 as a support structure for the diamond blade layer 10, enhancing the overall structural strength of the diamond tool bit, so that the tool bit can better resist deformation and damage during cutting, further prolonging the service life. The brazed diamond particles 202 on the surface of the iron sheet layer 20 corresponding to the diamond blade layer 10 enhance the bonding strength between the diamond blade layer 10 and the iron sheet layer 20, making the tool bit more stable and reliable during use, and thus enabling the tool bit to withstand greater cutting force and impact force, prolonging the service life of the tool bit. The diamond particles 202 are distributed on the surface of the iron sheet layer 20 corresponding to the diamond blade layer 10, which can be uniformly distributed or randomly distributed. Preferably, the diamond particles 202 are uniformly distributed on the surface of the iron sheet layer 20 corresponding to the diamond blade layer 10, effectively dispersing stress and greatly avoiding the situation of excessive local stress, thereby significantly improving the overall performance and durability of the diamond blade.

[0043] Referring to Figures 2-4 As shown, in some embodiments, diamonds can also be brazed on the outer edge 201 of the iron sheet layer. The brazing technique ensures the firm bonding between the diamond particles 202 and the iron sheet layer 20, reducing the shedding of diamond particles 202 during cutting, thereby improving the cutting efficiency and accuracy. The outer edge 201 of the iron sheet layer can also participate in the cutting work, i.e., jointly cutting with the outer edge 101 of the diamond blade layer, increasing the cutting life of the diamond tool bit and reducing the cutting cost. At the same time, since diamonds are brazed on the outer edge 201 of the iron sheet layer, there are usually several diamonds, and recessed structures are formed between adjacent diamonds, which can promote more cooling water to enter the cutting area of the diamond tool bit (the outer edge 201 of the iron sheet layer and the outer edge 101 of the diamond blade layer), reduce the thermal damage of the diamonds, and effectively flush away the cutting debris, improve the chip removal capacity, and improve the cutting performance.

[0044] The brazed diamond particles 202 of the iron sheet layer 20 can be set according to actual needs. In some embodiments, the brazed diamond particles 202 of the iron sheet layer 20 are 40 / 45 mesh diamond particles 202. The 40 / 45 mesh diamond particles 202 have moderate size, which neither too small to form an effective rough surface on the surface of the iron sheet layer 20, nor too large to affect the mechanical locking effect, so that they just form small recesses and uneven parts on the surface of the iron sheet layer 20, thereby significantly increasing the physical contact area between the diamond blade layer 10 and the iron sheet layer 20. At the same time, the 40 / 45 mesh diamond particles 202 have high hardness and wear resistance, which can more effectively resist wear during cutting, reduce the shedding of diamond particles 202 during cutting, and thus improve cutting efficiency and accuracy.

[0045] The number of the iron sheet layer 20 depends on the number of the diamond blade layer 10. In practical applications, the number of the diamond blade layer 10 is greater than or equal to four, and at this time, the iron sheet layer 20 has at least three. In some embodiments, the concentration of brazed diamonds on the outer edge 201 of the iron sheet layer on the inner side is less than the concentration of brazed diamonds on the outer edge 201 of the iron sheet layer on the outer side. This can maintain a clear groove 30 state of the tool bit at the beginning, middle and end of cutting, greatly improve the chip removal capacity of the tool bit, so that the debris generated during cutting can be more smoothly discharged, avoiding the risk of reduced cutting efficiency and tool damage caused by debris accumulation; also provides more space for the introduction of cooling water during cutting. Cooling water can more easily penetrate into the cutting area, effectively reducing the high temperature generated between the tool and the cutting material due to friction, reducing the risk of thermal damage; at the same time, it can effectively maintain the cutting strength of the tool bit and prevent performance degradation due to excessive wear. Referring to Figure 2 and Figure 4 As shown in the drawings, taking four iron sheet layers 20 as an example, the concentration of brazed diamonds on the outer edge 201 of the iron sheet layer on the inner side can be in the range of 22-28%, and the concentration of brazed diamonds on the outer edge 201 of the iron sheet layer on the outer side can be in the range of 32-38%.

[0046] The diamond tool bit can be formed by hot-pressing sintering after the diamond blade layers 10 and the iron sheet layers 20 are stacked. The diamond tool bit can also be formed by cold-pressing sintering after the diamond blade layers 10 and the iron sheet layers 20 are stacked in sequence. That is, a complete diamond tool bit cold blank is automatically formed in the cold-pressing stage, and then the diamond tool bit is formed by pressureless sintering. The cold-pressing production can be fully automated, the production process is simplified, the production cycle is shortened, the production efficiency is improved, the production cost is saved, the pressureless sintering process is adopted, the production efficiency and the sintering quality of the tool bit are improved. Compared with the traditional hot-pressing sintering process, the pressureless sintering process has simple equipment, convenient operation, large amount of sintering at one time, and low production cost. At the same time, it can ensure that the diamond particles 202 and the iron sheet form a good metallurgical bond, reduce pores and defects, and improve the hardness and wear resistance of the tool bit.

[0047] To further illustrate the diamond tool bit formed by cold-pressing sintering after the diamond blade layers 10 and the iron sheet layers 20 are stacked in sequence. Take a nine-layer tool bit as an example, which includes the following steps:

[0048] Preparation of the iron sheet layer 20 with brazed diamonds: The surface of the iron sheet is coated with BNi2 solder and 40 / 45 size diamond particles 202; wherein the concentration of diamond particles 202 in the outer iron sheet layer 20 is 35%, and the concentration of diamond particles 202 in the inner iron sheet layer 20 is 25%. The iron sheet with distributed solder and diamond particles 202 is placed in a brazing furnace for welding.

[0049] Material preparation of the diamond blade layer 10: This process includes preparing the matrix powder and diamond particles 202.

[0050] The prepared material of the diamond blade layer 10 is placed in a mixer for mixing, and after mixing for four hours, cold-pressing treatment is performed.

[0051] Cold blank forming: In the fully automatic cold press, it is divided into a core material boat, a side material boat, an iron sheet disc 1 (outer iron sheet layer 20), and an iron sheet disc 2 (inner iron sheet layer 20); during cold pressing, the material of the diamond blade layer 10 is first placed in the side material boat, then the iron sheet layer 20 is placed in the iron sheet disc 1 after pressing, then the material of the diamond blade layer 10 is placed in the core material boat after pressing, then the iron sheet layer 20 is placed in the iron sheet disc 2 after pressing, then the material of the diamond blade layer 10 is placed in the core material boat after pressing, then the iron sheet layer 20 is placed in the iron sheet disc 2 after pressing, then the material of the diamond blade layer 10 is placed in the core material boat after pressing, then the iron sheet layer 20 is placed in the iron sheet disc 1 after pressing, then the material of the diamond blade layer 10 is placed in the side material boat after pressing, and finally the tool bit cold blank is formed after pressing; due to the diamond particles 202 in the iron sheet layer 20, the bonding strength between the iron sheet layer 20 and the side sheet layer and the core sheet layer is high, and the cold blank strength meets the requirements.

[0052] No pressure sintering: the prepared cutter head cold blank is placed in a graphite tray, and the graphite tray is used to separate each cutter head cold blank. The graphite tray is placed in an atmosphere furnace (H2 and N2 mixed gas), the pressure in the furnace cavity is controlled at 0.1-0.2 MPa, the temperature is raised to 950°C at 10°C / min, and then the furnace is cooled after 30 min of heat preservation.

[0053] If several said diamond blade layers 10 are stacked, a layer of said iron sheet layer 20 is arranged between adjacent diamond blade layers 10. Referring to Figure 2 and Figure 3 In some embodiments, when stacked, the outer edge 201 of the iron sheet layer corresponds to the outer edge 101 of the diamond blade layer. Referring to Figure 4 and Figure 5 In some embodiments, when stacked, the projection of the outer edge 201 of the iron sheet layer in the height direction is in the diamond blade layer 10, so that the outer edges 101 of adjacent diamond blade layers have a groove 30 recessed from the outer edge to the inner edge. When cutting, a large amount of dust can exist in the groove 30. The groove 30 is used as a chip removal channel, so that the dust in the groove 30 can be flushed away in time, reducing the accumulation of dust and avoiding the phenomenon of blockage and tool jamming during cutting, and maintaining the sharpness of the outer edge of the cutter head. The above-mentioned groove 30 can be linear, wavy, etc.

[0054] The outer edge 101 of the diamond blade layer can have different shapes to have cutting function. The shape can be arc-shaped, linear, zigzag-shaped, etc. Among them, the zigzag-shaped can have different shapes and sizes, such as trapezoidal tooth tip, triangular tooth tip (see Figures 2-4 ), wavy tooth tip, etc. to adapt to different cutting requirements.

[0055] The utility model also provides a saw blade which applies the above-mentioned diamond cutter head. It ensures that even in high-intensity and high-frequency cutting operations, the saw blade can maintain very high structural integrity and use stability, prolonging the service life of the saw blade.

[0056] Finally, it should be noted that although the above-mentioned embodiments have been described in the specification and drawings of the present application, it does not limit the patent protection scope of the present application. Any equivalent structure or equivalent process substitution or modification based on the essential concept of the present application, using the content described in the specification and drawings of the present application, and directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, etc. are all included in the patent protection scope of the present application.

Claims

1. A diamond tip comprising a plurality of layers of diamond blades and layers of iron sheet; the outer edge of each layer of diamond blades has diamond grains for cutting; characterized in that, Several said diamond blade layers are stacked, and a layer of said iron sheet layer is arranged between adjacent diamond blade layers, and the iron sheet layer is brazed with diamonds on the surface corresponding to the diamond blade layer.

2. The diamond tip of claim 1, wherein, The diamond blade layer is formed by mixing and cold pressing the matrix powder and diamond particles.

3. The diamond tip of claim 1, wherein, The outer edge of the iron sheet layer is brazed with diamonds.

4. A diamond tip according to claim 1 or 3, wherein The iron sheet layer is brazed with 40 / 45 size diamonds.

5. The diamond tip of claim 2, wherein, The iron sheet layer has at least three pieces, and the concentration of diamonds brazed on the outer edge of the iron sheet layer on the inner side is less than that on the outer side.

6. A diamond tip as claimed in claim 5, wherein, The concentration of diamonds brazed on the outer edge of the iron sheet layer on the inner side is 22-28%, and the concentration of diamonds brazed on the outer edge of the iron sheet layer on the outer side is 32-38%.

7. The diamond tip of claim 1 wherein, The diamond blade head is formed by cold pressing the cold blank of the diamond blade layer and the iron sheet layer in the stacking order.

8. The diamond tip of claim 1 wherein, When stacking, the outer edge of the iron sheet layer corresponds to the outer edge of the diamond blade layer.

9. The diamond tip of claim 1 wherein, When stacking, the projection of the outer edge of the iron sheet layer in the height direction is in the diamond blade layer, so that the outer edges of adjacent diamond blade layers have a groove recessed from the outer edge to the inner edge.

10. A saw blade using the diamond blade head of any one of claims 1-9.

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