A novel diamond-reinforced hammer tip for a shredder and a shredder or hammer mill device comprising the same

Abstract

The application relates to a novel diamond hammer sheet for a pulverizer and a pulverizer or hammer mill device comprising the same, the hammer sheet comprising a main body member, one end of the main body member being provided with a fixing hole, and the other end being a working area. Two working end faces of the working area are provided with grooves, at least one wear-resistant layer is arranged in the grooves, and at least one reinforcing layer is arranged on the upper and lower two working faces of the working area. The at least one wear-resistant layer comprises superhard material diamond polycrystal or diamond composite material, and the at least one reinforcing layer is a diamond composite coating or a diamond coating. Through the multi-layer composite structure design and the combination of multiple processes, the wear resistance, impact resistance and service life of the hammer sheet are significantly improved, and the problems of easy wear and short service life of the traditional hammer sheet are solved. Experiments show that the hammer sheet can continuously run for 150 days, the service life is more than 15 times that of high-end hammer sheets, the maintenance cost is effectively reduced, and the production efficiency and quality stability are improved.

Description

Technical Field

[0001] This utility model relates to the field of pulverizer technology and machinery, specifically to hammer blades used in teardrop pulverizers, micro pulverizers, vertical pulverizers, dual rotor pulverizers, multi-cavity pulverizers, washboard pulverizers, screenless pulverizers, etc., and pulverizers or hammer mills containing said hammer blades. Background Technology

[0002] Traditional hammer blades are made by depositing cemented carbide powder onto the working surface using a welding process to form a wear-resistant layer, thereby extending the service life of the hammer blades. However, due to the inherent properties of cemented carbide powder, it is prone to burning and dissolving during welding. The preparation process is difficult to control, and the powder itself has poor wear resistance, resulting in short service life and frequent replacement of the hammer blades.

[0003] Some new material technologies use powder metallurgy to hot-press and sinter diamonds into homogeneous single-piece hammer products. These products have excessively high hardness, poor impact resistance, and are prone to breakage.

[0004] A patent application for a crusher hammer blade (application number 201810808717.7) describes a method for preparing the hammer blade by brazing superhard abrasive particles onto the working surface. However, due to its structural issues, the non-working surfaces of the hammer blade are not adequately protected, and the wear resistance of the hammer blade substrate itself is not considered during operation. The accumulation and compression of the crushed material on the non-working surfaces cause the hammer blade substrate, made of materials such as carbon steel, alloy steel, and cast iron, to wear out too quickly, thus affecting the overall wear resistance and service life of the hammer blade.

[0005] This invention involves overlaying a cemented carbide bonding layer, welding a polycrystalline diamond or diamond composite module onto the base steel of the hammer blade, vacuum sintering a diamond micro-powder composite coating, and physical or chemical vapor deposition of a diamond film to form a wear-resistant layer and a reinforcing layer composed of four layers of cemented carbide and diamond structure. The resulting hammer blade has extremely high hardness and also possesses excellent impact resistance, wear resistance, thermal conductivity, and corrosion resistance.

[0006] This invention reduces downtime, lowers maintenance costs, improves work efficiency, enhances product quality stability, and reduces scrap steel production. The product is impact-resistant, wear-resistant, thermally conductive, and corrosion-resistant, with a service life more than 15 times that of current high-end hammer blades.

[0007] The lifespan of hammer blades currently on the market is 7-10 days, while the one in this application has been used for nearly 150 days and is still in normal use. Summary of the Invention

[0008] To address the aforementioned technical problems, this utility model proposes a novel diamond-reinforced hammer blade for a crusher. This novel diamond-reinforced hammer blade possesses ultra-hard and wear-resistant properties, while also exhibiting wear resistance, impact resistance, corrosion resistance, and excellent thermal conductivity. It can significantly improve the working efficiency of crushers and hammer milling equipment and reduce maintenance costs.

[0009] This utility model also proposes a crusher or hammer mill with the novel diamond-reinforced hammer blades.

[0010] To achieve the above objectives, a novel diamond-reinforced hammer for a crusher is proposed according to an embodiment of the first aspect of this utility model. The diamond-reinforced hammer for the crusher includes a sheet-like main body component. One end of the main body component is provided with a fixing hole, and the other end is a working area. The working area includes a left end face, a right end face, and a front end face. Grooves are provided on the left end face, the right end face, and the front end face. At least one wear-resistant layer is provided in the groove. The working area also includes two opposing working surfaces. At least one reinforcing layer is provided on the two working surfaces. The at least one wear-resistant layer and the at least one reinforcing layer are made of the same or different materials. The at least one wear-resistant layer is an embedded module made of ultra-high hardness material, arranged at equal intervals along a straight line in the groove.

[0011] The diamond-reinforced hammer blade for a crusher according to the above embodiments of the present invention may also have the following additional technical features: the number of grooves is one, the grooves are continuously and through the middle position of the left end face, the right end face and the front end face, and the total width of the grooves is about 30-50% of the thickness of the main component.

[0012] In one embodiment of the present invention, the groove is discontinuously disposed at the middle position of the left end face, the right end face and the front end face, and the length of the groove extending on each end face is greater than or equal to 90%, preferably greater than or equal to 95%.

[0013] Furthermore, the groove is circular, trapezoidal, elongated, or U-shaped, with its bottom surface being arc-shaped or flat. The shape or size of the groove can be flexibly adjusted according to the different uses of the hammer.

[0014] In one embodiment of this utility model, the number of grooves is an even number, for example, two. The two grooves are arranged in parallel at the midpoint of the left end face, right end face, and front end face, and the total width of the grooves is approximately 30% of the thickness of the main component.

[0015] In another embodiment of this utility model, the number of grooves is an odd number, for example, three. The three grooves are arranged in parallel at the midpoint of the left end face, right end face, and front end face, and the total width of the grooves is approximately 50% of the thickness of the main component.

[0016] Furthermore, the at least one wear-resistant layer includes a first wear-resistant layer and a second wear-resistant layer. The first wear-resistant layer is formed in the groove by overlay welding. The second wear-resistant layer is disposed on the first wear-resistant layer. The second wear-resistant layer includes an embedded module, which is uniformly disposed in the groove by welding.

[0017] In one embodiment of this utility model, the thickness of the first wear-resistant layer is 0.5-1.5mm, the first wear-resistant layer is preferably a tungsten carbide wear-resistant adhesive layer, and the second wear-resistant layer is an ultra-high hardness material, diamond polycrystalline or diamond composite module, arranged at equal intervals along a straight line in the groove.

[0018] In one embodiment of this utility model, the second wear-resistant layer uses composite ceramic as an ultra-high hardness material, which is arranged in the groove at equal intervals along a straight line.

[0019] Further, the at least one reinforcing layer includes a first reinforcing layer, a second reinforcing layer, and / or a third reinforcing layer, which are sequentially disposed outward along the surface of the hammer body structure. The first reinforcing layer is formed by welding overlay on the entire working area surface of the hammer body structure, including left and right end faces, a front face, and two opposing working surfaces. The second reinforcing layer is formed by vacuum sintering on the entire working area surface of the hammer body structure, including left and right end faces, a front face, and two opposing working surfaces. The third reinforcing layer is formed on the overall surface of the hammer by vapor deposition, and the first reinforcing layer is uniformly distributed on the working area surface.

[0020] Furthermore, the thickness of the first reinforcing layer is 0.5-1.5 mm, and the first reinforcing layer is preferably a tungsten carbide reinforcing layer. The first reinforcing layer and the first wear-resistant layer are integrally formed on the surface of the entire working area of ​​the main structure of the hammer blade by overlay welding.

[0021] Furthermore, the second reinforcing layer is preferably a diamond composite layer, wherein the deposition material mixture of the diamond composite layer comprises the following substances in the following mass ratio: 72-82% tungsten carbide cemented carbide and 18-28% diamond, wherein the tungsten carbide cemented carbide comprises 35-45% tungsten carbide, 8-15% nickel, 5-15% cubic boron nitride, 2-10% titanium, 2-10% molybdenum, 2-8% copper, and the balance being unavoidable impurities.

[0022] Furthermore, the third reinforcing layer is preferably a diamond coating, and the deposition material of the diamond coating is diamond micro powder, preferably with a particle size range of 23-48 micrometers, that is, diamond with a particle size of 300-600 mesh.

[0023] In one embodiment of the present invention, the distribution of the first reinforcing layer on the working area of ​​the hammer is uneven, and the thickness of its weld overlay gradually increases along the direction away from the fixing hole, so that the working area of ​​the hammer gradually forms a trapezoidal structure.

[0024] In one embodiment of the present invention, the edge portion of the working area of ​​the hammer blade has an arc-shaped protruding transition section, and the included angle between the arc-shaped transition section and the side edge ranges from 45° to 75°.

[0025] In one embodiment of this utility model, the fixing holes are located at both ends of the main body component, and both ends of the hammer can serve as working areas.

[0026] In one embodiment of this utility model, a corrosion-resistant protective layer is provided in the non-working area of ​​the main component. The corrosion-resistant coating is made of silicon-based compound and has excellent corrosion resistance, effectively resisting chemical erosion caused by corrosive materials.

[0027] In one embodiment of this utility model, the thickness of the anti-corrosion coating is 0.1-0.3 mm, and it is prepared by electrophoretic deposition technology to ensure the uniformity and adhesion of the coating.

[0028] According to a second aspect of the present invention, a crusher or hammer mill is also provided, the crusher or hammer mill comprising the novel diamond-reinforced hammer blades according to the first aspect of the present invention.

[0029] According to some embodiments of this utility model, the pulverizer or hammer mill is particularly suitable for industrial sectors such as pharmaceuticals, food, chemicals, scientific research, and metallurgy to pulverize materials or ores into the required particle size.

[0030] Compared with the prior art, the advantages and positive effects of this utility model are as follows: This novel diamond-reinforced hammer blade significantly enhances its impact resistance, wear resistance, thermal conductivity, and corrosion resistance by incorporating multiple composite wear-resistant layers and multiple composite reinforcing layers. Furthermore, its unique structural design significantly improves product quality stability. On one hand, the grooved design with embedded ultra-hard composite material modules further enhances the overall hardness and wear resistance of the hammer blade. On the other hand, the gradual gradient design of the first reinforcing layer thickness strengthens the end-face strength of the hammer blade. This novel hammer blade boasts a service life more than 15 times that of current high-end hammer blades. Crusher or milling equipment using this novel diamond-reinforced hammer blade can significantly reduce downtime, lower maintenance costs, improve work efficiency and product quality stability, and reduce the output of scrap steel. Attached Figure Description

[0031] Figure 1 This is a schematic front cross-sectional view of the novel diamond-reinforced hammer blade in Example 1; Figure 2 This is a side cross-sectional schematic diagram of the novel diamond-reinforced hammer blade of Example 1; Figure 3 This is a schematic diagram of the structure of the novel diamond-reinforced hammer blade in Example 2; Figure 4 This is a schematic diagram of the structure of the novel diamond-reinforced hammer blade in Example 3; In the figure, 1-Main structure of the hammer blade, 2-Groove, 3-First wear-resistant layer, 4-Second wear-resistant layer, 5-Second reinforcing layer, 6-Third reinforcing layer. Detailed Implementation

[0032] The utility model will now be further described in conjunction with the accompanying drawings and specific embodiments. For the sake of brevity, only the parts relevant to the disclosure are schematically shown in each drawing; they do not represent the actual structure of the product. Furthermore, for the sake of clarity and ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0033] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0035] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] Example 1 The following is passed Figure 1 and Figure 2 This application demonstrates a novel diamond-reinforced hammer blade for a crusher.

[0037] See Figure 1 and Figure 2 , Figure 1 This is a front sectional view of a novel diamond-reinforced hammer for a crusher according to this application. The novel diamond-reinforced hammer includes a sheet-like main body component 1, with a fixing hole at one end and a working area at the other end. The working area includes a left end face, a right end face, and a front end face. Grooves 2 are provided on the left end face, the right end face, and the front end face. A first wear-resistant layer 3 and a second wear-resistant layer 4 are provided in the grooves 2. The working area also includes two opposing working surfaces, with a first reinforcing layer (not shown in the sectional view), a second reinforcing layer 5, and a third reinforcing layer 6 provided on the two working surfaces.

[0038] In this embodiment, the main component 1 of the hammer is preferably made of high-manganese steel, which has good toughness and strength and can withstand high-intensity impact loads. After quenching and tempering, the high-manganese steel substrate reaches a hardness of HRC45 and also has good fatigue resistance.

[0039] The groove 2 is continuously and continuously disposed at the midpoint of the left end face, right end face, and front end face of the working area of ​​the main structure. The total width of the groove 2 is approximately 30% of the thickness of the main component. The groove 2 is trapezoidal in shape, with a flat bottom surface, a maximum depth of 2.5 mm, and a maximum width of 3 mm. In different embodiments, the groove 2 can also be circular, elongated, or U-shaped. The shape or size of the groove 2 can be flexibly adjusted according to the different uses of the hammer blade, and no specific limitation is made in this utility model.

[0040] To enhance the overall strength and wear resistance of the hammer blade's main structure, a first wear-resistant layer 3 of tungsten carbide is formed at the bottom of the groove through a welding process, with its thickness controlled between 0.5 and 0.6 mm. The average particle size of the tungsten carbide is 50 μm. During the welding process, the tungsten carbide particles are mixed with nickel-based alloy powder and uniformly distributed on the surface of the hammer blade's main structure, forming a dense first wear-resistant layer 3. After welding, ultrasonic testing is used to ensure that the coating is free of cracks and pores, guaranteeing that its bonding strength with the hammer blade's main component 1 reaches over 300 MPa. The tungsten carbide bonding layer not only improves the hardness of the working surface but also effectively slows down the wear rate.

[0041] Furthermore, a second wear-resistant layer 4 is disposed on the first wear-resistant layer 3. The second wear-resistant layer 4 is an embedded module composed of ultra-high hardness materials such as polycrystalline diamond or diamond composite modules, which is uniformly fixed in the groove 2 along a straight line by laser welding. The dimensions of the polycrystalline diamond or diamond composite module are 2×2×2 mm. During the welding process, the energy density of the laser beam is precisely controlled to avoid thermal damage to the polycrystalline diamond or diamond composite modules due to high temperature. The spacing between adjacent embedded modules is set to 2 mm. This arrangement not only improves the overall wear resistance of the working surface but also enhances the bonding strength between the module and the substrate, ensuring that the module is not easily detached under high-intensity impact conditions.

[0042] In this embodiment, the first reinforcing layer and the first wear-resistant layer 3 have the same material composition and processing method. That is, the first reinforcing layer is formed on the entire working area surface of the hammer body structure, including the left and right end faces, the front end face, and the two opposing working surfaces, through a welding process. Thus, the first wear-resistant layer 3 and the first reinforcing layer together constitute the first reinforcing layer attached to the entire working area surface of the hammer body structure.

[0043] Further, diamond micropowder and tungsten carbide cemented carbide are mixed in a specific ratio to obtain a mixed deposit, comprising the following mass ratio: 72-82% tungsten carbide cemented carbide and 18-28% diamond. The tungsten carbide cemented carbide includes 35-45% tungsten carbide, 8-15% nickel, 5-15% cubic boron nitride, 2-10% titanium, 2-10% molybdenum, and 2-8% copper, with the balance being unavoidable impurities. The mixed deposit is deposited on top of the first reinforcing layer using vacuum sintering to form a second reinforcing layer 5, covering the entire working area surface of the hammer blade's main structure, including the left and right end faces, the front end face, and the two opposing upper and lower working surfaces. During sintering, the vacuum environment effectively prevents oxidation reactions, thus ensuring the density and hardness of the second reinforcing layer 5. The final second reinforcing layer 5 has a thickness of 1.8 mm and a surface hardness exceeding HV 1200, effectively protecting the working area from damage caused by material accumulation and compression.

[0044] Furthermore, this embodiment also includes a third reinforcing layer 6. The third reinforcing layer 6 is a diamond coating, which is formed on the entire surface of the hammer blade by chemical or physical vapor deposition of diamond micropowder, with a thickness of 5-8 μm. The diamond micropowder preferably has a particle size range of 23-48 μm, i.e., diamond with a particle size of 300-600 mesh. After coating, the hardness of the coating layer is tested using a microhardness tester, requiring a minimum of HV2000. The coating layer covers the entire surface of the hammer blade, protecting non-working areas and reducing substrate damage caused by accumulation and compression, while also further improving the thermal conductivity of the hammer blade.

[0045] Combination Figure 1 and Figure 2 As shown, the first, second, and third reinforcing layers are sequentially arranged outwards along the surface of the hammer blade's main structure. Furthermore, the distribution of the second reinforcing layer in the working area of ​​the hammer blade is uneven; its thickness gradually increases away from the fixing hole, causing the working area of ​​the hammer blade to gradually form a trapezoidal structure with an overall tilt angle of approximately 70-80°. Therefore, the two right angles on the working end face of the hammer blade of this invention form a sharper working angle, resulting in a greater impact force on the material to be crushed and higher working efficiency.

[0046] In practical applications, the new diamond-reinforced hammer blades are suitable for installation in the crushing chamber of crushers or hammer mills. During the crushing or hammer milling process, the working area of ​​the new diamond-reinforced hammer blades is in direct contact with the material to be crushed, achieving efficient crushing through high-speed rotation, impact, and friction.

[0047] This embodiment significantly enhances the impact resistance, wear resistance, thermal conductivity, and corrosion resistance of the hammer blade by uniformly distributing multiple composite wear-resistant layers and multiple composite reinforcing layers on the main component. Furthermore, this product achieves a substantial improvement in product quality stability through a unique structural design. On one hand, the overall hardness and wear resistance of the hammer blade are enhanced by using grooves and embedded ultra-hard composite material modules. On the other hand, the gradual gradient design of the first reinforcing layer thickness strengthens the end-face strength of the hammer blade. The new hammer blade of this invention has a long service life, more than 15 times that of current high-end hammer blades. Crusher or milling equipment using the new diamond-reinforced hammer blade described in this invention can significantly reduce downtime, lower maintenance costs, improve work efficiency and product quality stability, and reduce the output of scrap steel.

[0048] Example 2 See Figure 3 , Figure 3This is another embodiment of the present application, similar to Embodiment 1, except that fixing holes are provided at both ends of the main body component 1 of the novel diamond-reinforced hammer blade. Furthermore, working areas are provided at both ends of the main body component 1 of the novel diamond-reinforced hammer blade, forming a symmetrical structure both horizontally and vertically. The fixing holes are used to install the hammer blade onto a crusher or hammer mill, meaning the hammer blade is detachably connected to the crusher or hammer mill, facilitating maintenance and upkeep. The two fixing holes allow for more comprehensive utilization of the hammer blade's crushing performance, further extending its service life. The center line connecting the two fixing holes coincides with the center line of the main body component 1 of the hammer blade, facilitating centrifugal rotation of the hammer blade and better contact with the material to be crushed.

[0049] Furthermore, in this embodiment, the groove 2 is discontinuously arranged at the midpoint of the left, right, and front end faces of the working area of ​​the main structure. The length of the groove 2 on each end face accounts for more than 95% of the length of the end face it is on, and the total width of the groove 2 is approximately 30% of the thickness of the main component. The groove 2 is a long strip groove with a flat bottom surface, a depth of 3 mm, and a maximum width of 3 mm. In different embodiments, the groove 2 can also be circular, long strip, or U-shaped. The shape or size of the groove 2 can be flexibly adjusted according to the different uses of the hammer blade, and no specific limitation is made in this utility model. For example, when used for grain crushing, the width of the groove 2 can be set to 2 mm to 3 mm, and the depth to 2 mm to 3 mm; while for ore crushing, a larger groove 2 may be needed to adapt to more severe impact conditions.

[0050] To enhance the overall strength and wear resistance of the hammer blade's main structure, a first wear-resistant tungsten carbide layer 3 is formed at the bottom of the groove 2 through a welding process, with its thickness controlled between 0.8 and 1.0 mm. The average particle size of the tungsten carbide particles is 50 μm. During the welding process, the tungsten carbide particles are mixed with nickel-based alloy powder and uniformly distributed on the surface of the hammer blade's main structure, forming a dense first wear-resistant layer 3. After welding, ultrasonic testing is used to ensure that the coating is free of cracks and pores, guaranteeing that its bonding strength with the hammer blade's main component 1 reaches over 300 MPa. The tungsten carbide bonding layer not only improves the hardness of the working surface but also effectively slows down the wear rate.

[0051] Furthermore, a second wear-resistant layer 4 is provided on the first wear-resistant layer 3. The second wear-resistant layer 4 is an embedded module made of ultra-high hardness composite ceramic material, which is uniformly fixed in the groove 2 along a straight line by welding. The dimensions of the composite ceramic module are 2×2×2 mm. Various conventional welding methods such as brazing, vacuum diffusion welding, electron beam welding, and laser welding can be used. During the welding process, the welding temperature is precisely controlled to avoid thermal damage to the composite ceramic module due to high temperature. The spacing between adjacent embedded modules is set to 2 mm. This arrangement not only improves the overall wear resistance of the working surface but also enhances the bonding strength between the module and the substrate, ensuring that the module is not easily detached under high-intensity impact conditions.

[0052] In this embodiment, similar to Embodiment 1, the first wear-resistant layer 3 and the first reinforcing layer together constitute the first reinforcing layer attached to the surface of the entire working area of ​​the hammer blade main structure.

[0053] Further, diamond micropowder and tungsten carbide cemented carbide are mixed in a specific ratio to obtain a mixed deposit, comprising the following mass ratio: 72-82% tungsten carbide cemented carbide and 18-28% diamond. The tungsten carbide cemented carbide includes 35-45% tungsten carbide, 8-15% nickel, 5-15% cubic boron nitride, 2-10% titanium, 2-10% molybdenum, and 2-8% copper, with the balance being unavoidable impurities. The mixed deposit is deposited on top of the first reinforcing layer by vacuum sintering to form a second reinforcing layer 5, covering the entire working area surface of the hammer blade's main structure, including the left and right end faces, the front end face, and the two opposing upper and lower working surfaces. During sintering, the vacuum environment effectively prevents oxidation reactions, thus ensuring the density and hardness of the second reinforcing layer 5. The final second reinforcing layer 5 has a thickness of 2.0 mm and a surface hardness exceeding HV 1200, effectively protecting the working area from damage caused by material accumulation and compression.

[0054] See Figure 3 The first and second reinforcing layers are sequentially arranged outwards along the surface of the hammer blade's main structure. Furthermore, the distribution of the second reinforcing layer in the working area of ​​the hammer blade is uneven; its thickness gradually increases away from the fixing hole, causing the working area of ​​the hammer blade to gradually form a trapezoidal structure with an overall tilt angle of approximately 70-80°. Therefore, the two right angles on the working end face of the hammer blade of this invention form a sharper working angle, resulting in greater impact force on the material to be crushed and higher working efficiency.

[0055] In practical applications, the new diamond-reinforced hammer blades are suitable for installation in the crushing chamber of crushers or hammer mills. During the crushing or hammer milling process, the working area of ​​the new diamond-reinforced hammer blades is in direct contact with the material to be crushed, achieving efficient crushing through high-speed rotation, impact, and friction.

[0056] This embodiment, by setting two symmetrically distributed fixing holes and two working areas on the main component of the hammer blade, can further extend the service life of each hammer blade compared to Embodiment 1. Thus, the same technical effect as Embodiment 1 can be achieved by simply setting the first and second reinforcing layers. Simultaneously, by omitting the third reinforcing layer, this embodiment further reduces manufacturing costs. In practice, the service life of the new hammer blade of this invention can still reach more than 15 times that of current high-end hammer blades. Crusher or milling equipment using the new diamond-reinforced hammer blades described in this invention can also significantly reduce downtime, lower maintenance costs, improve work efficiency and product quality stability, and reduce the output of scrap steel.

[0057] Example 3 See Figure 4 , Figure 4 This is another embodiment of the present application, similar to Embodiment 1, except that two grooves 2 are provided on the left, right, and front end faces of the novel diamond-reinforced hammer. These two grooves are arranged parallel to each other at the midpoint of the left, right, and front end faces, and the total width of the grooves is approximately 30% of the thickness of the main component. Of course, the number of grooves in this invention can also be an odd number, such as three. The number of grooves is flexibly determined based on the hammer thickness, processing difficulty, and intended application scenario. Regardless of the variation, all grooves are preferably arranged parallel to each other at the midpoint of the left, right, and front end faces, and the total width of the grooves is preferably at most 50% of the thickness of the main component.

[0058] In this embodiment, a first wear-resistant layer 3 and a second wear-resistant layer 4 are provided in the groove 2. The working area also includes two working surfaces that are opposite each other. A first reinforcing layer (not shown in the cross-sectional view), a second reinforcing layer 5 and a third reinforcing layer 6 are provided on the two working surfaces.

[0059] The groove 2 is continuously and continuously disposed at the midpoint of the left end face, right end face, and front end face of the working area of ​​the main structure. The total width of the groove 2 is approximately 50% of the thickness of the main component. The groove 2 is U-shaped with an arc-shaped bottom surface, a maximum depth of 4 mm, and a maximum width of 3 mm. The shape or size of the groove 2 can be flexibly adjusted according to the different uses of the hammer blade, and no specific limitation is made in this utility model. For example, when used for grain crushing, the width of the groove 2 can be set to 2 mm to 3 mm, and the depth to 2 mm to 3 mm; while for ore crushing, a larger groove 2 may be needed to adapt to more severe impact conditions.

[0060] To enhance the overall strength and wear resistance of the hammer blade's main structure, a first wear-resistant layer 3 of tungsten carbide is formed at the bottom of the groove through a welding process, with its thickness controlled between 1.2 and 1.5 mm. The average particle size of the tungsten carbide is 50 μm. During the welding process, the tungsten carbide particles are mixed with nickel-based alloy powder and uniformly distributed on the surface of the hammer blade's main structure, forming a dense first wear-resistant layer 3. After welding, ultrasonic testing is used to ensure that the coating is free of cracks and pores, guaranteeing that its bonding strength with the hammer blade's main component 1 reaches over 300 MPa. The tungsten carbide bonding layer not only improves the hardness of the working surface but also effectively slows down the wear rate.

[0061] Furthermore, a second wear-resistant layer 4 is disposed on the first wear-resistant layer 3. The second wear-resistant layer 4 is an embedded module made of ultra-high hardness material, polycrystalline diamond or diamond composite material, which is uniformly fixed in the groove 2 along a straight line by welding. The dimensions of the composite ceramic module are 2×2×2 mm. Various conventional welding methods such as brazing, vacuum diffusion welding, electron beam welding, and laser welding can be used. During the welding process, the energy density of the laser beam is precisely controlled to avoid thermal damage to the composite ceramic module due to high temperature. The spacing between adjacent embedded modules is set to 2 mm. This arrangement not only improves the overall wear resistance of the working surface but also enhances the bonding strength between the module and the substrate, ensuring that the module is not easily detached under high-intensity impact conditions.

[0062] In this embodiment, the first reinforcing layer and the first wear-resistant layer 3 have different material compositions, but the processing methods are the same. That is, tungsten carbide is deposited on the entire working area surface of the hammer body structure, including the left and right end faces, the front end face, and the two opposing working surfaces, through a welding process to form the first reinforcing layer. Thus, the first wear-resistant layer 3 and the first reinforcing layer together constitute the first reinforcing layer attached to the entire working area surface of the hammer body structure.

[0063] Further, diamond micropowder and tungsten carbide cemented carbide material are mixed in a specific ratio to obtain a mixed deposit, which includes the following mass ratio of 75% tungsten carbide cemented carbide material and 25% diamond. The mixed deposit is deposited on the first reinforcing layer by vacuum sintering to form a second reinforcing layer 5, which covers the entire working area surface of the main structure of the hammer blade, including the left and right end faces, the front end face, and the two opposing upper and lower working surfaces.

[0064] Furthermore, this embodiment also includes a third reinforcing layer 6, which is a diamond coating. Diamond micropowder is formed on the entire surface of the hammer blade through chemical or physical vapor deposition, and its thickness is 5-8 μm. The diamond micropowder preferably has a particle size range of 23-48 μm, i.e., diamond with a particle size of 300-600 mesh. After coating, the hardness of the coating layer is tested using a microhardness tester, and is required to be no less than HV2000. The coating layer covers the entire surface of the hammer blade, protecting non-working areas and reducing substrate damage caused by accumulation and compression. It also further improves the thermal conductivity of the hammer blade.

[0065] See Figure 4 The first reinforcing layer, the second reinforcing layer 5, and the third reinforcing layer 6 are sequentially arranged outwards along the surface of the hammer blade's main structure. Furthermore, in this embodiment, the edge portion of the working area of ​​the hammer blade has an arc-shaped protruding transition section, and the angle α between the arc-shaped transition section and the left and right end faces ranges from 45° to 75°. Therefore, the two right angles on the working end face of the hammer blade of this invention form a sharper working angle, resulting in a greater impact force on the material to be crushed and higher working efficiency.

[0066] Furthermore, in this novel example, a corrosion-resistant protective layer is provided in the non-working area of ​​the main component 1. The corrosion-resistant coating is formed by depositing a silicon-based compound in the non-working area using electrophoretic deposition technology. The coating thickness is 0.1-0.3 mm, which has excellent corrosion resistance and can effectively resist chemical erosion caused by corrosive materials.

[0067] In practical applications, the new diamond-reinforced hammer blades are suitable for installation in the crushing chamber of crushers or hammer mills. During the crushing or hammer milling process, the working area of ​​the new diamond-reinforced hammer blades is in direct contact with the material to be crushed, achieving efficient crushing through high-speed rotation, impact, and friction.

[0068] This embodiment further enhances the hardness and impact force of the hammer blade, and improves crushing efficiency, by setting multiple evenly distributed grooves on the main component of the hammer blade and welding ultra-hard wear-resistant material embedded modules into the grooves. In practice, the service life of the new hammer blade of this invention can reach more than 18 times that of current high-end hammer blades. Crusher or milling equipment using the new diamond-reinforced hammer blade described in this invention can also significantly reduce downtime, lower maintenance costs, improve work efficiency and product quality stability, and reduce the output of scrap steel.

[0069] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel diamond-reinforced hammer for a crusher, comprising a sheet-like main body component, wherein a fixing hole is provided at one end of the main body component and the other end is a working area, characterized in that: The working area includes a left end face, a right end face, and a front end face. Grooves are provided on the left end face, the right end face, and the front end face. At least one wear-resistant layer is provided in the groove. The working area also includes two working surfaces that are opposite each other. At least one reinforcing layer is provided on the two working surfaces. The at least one wear-resistant layer and the at least one reinforcing layer are made of the same or different materials. The at least one wear-resistant layer includes superhard material diamond polycrystalline or diamond composite material.

2. The novel diamond-reinforced hammer blade for a crusher according to claim 1, characterized in that: The number of grooves is one or more, and the grooves are continuously or discontinuously arranged at equal intervals in the middle position of the left end face, right end face and front end face. The total width of the grooves is approximately 30-50% of the thickness of the main component.

3. The novel diamond-reinforced hammer blade for a crusher according to claim 1, characterized in that: The at least one wear-resistant layer includes a first wear-resistant layer and a second wear-resistant layer. The first wear-resistant layer is formed in the groove by welding. The second wear-resistant layer is disposed on the first wear-resistant layer. The second wear-resistant layer includes an embedded module, which is uniformly disposed in the groove by welding.

4. The novel diamond-reinforced hammer blade for a crusher according to claim 3, characterized in that: The thickness of the first wear-resistant layer is 0.5-1.5mm. The first wear-resistant layer is preferably a tungsten carbide wear-resistant bonding layer. The second wear-resistant layer is an ultra-high hardness material, preferably a polycrystalline diamond, a diamond composite module, or a composite ceramic, and is arranged in the groove at equal intervals along a straight line.

5. The novel diamond-reinforced hammer blade for a crusher according to claim 1, characterized in that: The at least one reinforcing layer includes a first reinforcing layer, a second reinforcing layer, and / or a third reinforcing layer. The first reinforcing layer is formed by welding overlay on the entire working area surface of the main body structure of the hammer blade, including the left and right end faces, the front end face, and two opposing working surfaces. The second reinforcing layer is formed by vacuum sintering on the entire working area surface of the main body structure of the hammer blade, including the left and right end faces, the front end face, and two opposing working surfaces. The third reinforcing layer is formed on the overall surface of the hammer blade by vapor deposition. The first reinforcing layer is uniformly or non-uniformly distributed on the working area surface.

6. The novel diamond-reinforced hammer blade for a crusher according to claim 5, characterized in that: The thickness of the first reinforcing layer is 0.5-1.5 mm. The first reinforcing layer is preferably a tungsten carbide reinforcing layer. The second reinforcing layer is preferably a diamond composite layer. The third reinforcing layer is preferably a diamond coating. The deposition material of the diamond coating is diamond micron powder.

7. The novel diamond-reinforced hammer blade for a crusher according to claim 1, characterized in that: The edge of the working area has an arc-shaped transition section, and the arc-shaped transition section forms an angle α with the side, the angle α ranging from 45° to 75°.

8. The novel diamond-reinforced hammer blade for a crusher according to claim 1, characterized in that: The fixing holes are located at both ends of the main body component, and the hammer blade as a whole serves as the working area.

9. The novel diamond-reinforced hammer blade for a crusher according to claim 1, characterized in that, The non-working areas of the main component are provided with a corrosion-resistant protective layer.

10. A crusher or hammer mill, characterized in that, Including the novel diamond-reinforced hammer blade according to any one of claims 1 to 9.

Images