Composite hammer head of crusher and preparation method of composite hammer head of crusher

Abstract

The invention belongs to the technical field of crushers, and discloses a crusher composite hammerhead and a preparation method of the crusher composite hammerhead. The crusher composite hammerhead comprises a connecting base body and a hammerhead working part, and the connecting base body is provided with a first anti-falling structure, a second anti-falling structure and an anti-falling through hole; the hammer head working part is formed on the outer side of the connecting base body in a casting mode through a wear-resisting material, an anti-disengaging rib is formed in the anti-disengaging through hole, and the first anti-disengaging structure and the second anti-disengaging structure are both embedded in the hammer head working part. The hammerhead working part prevents materials from being in contact with the connecting base body, abrasion resistance is taken into account on the basis that strength and toughness are reserved, during working, the hammerhead working part is used for protecting high-speed impact, shearing and extrusion parts between the whole hammerhead and the materials, abrasion loss is reduced, the service life is prolonged, and the service life of the hammerhead is prolonged. And the bonding force between molecules during fusion, the first anti-falling structure, the second anti-falling structure and the anti-falling rib are used for ensuring the connecting strength between the connecting base body and the hammer head working part after casting.

Description

Technical Field

[0001] The present invention relates to the technical field of crushers, and in particular to a composite hammer head for a crusher and a preparation method of the composite hammer head for a crusher. Background Art

[0002] Hammer crushers, as crucial process equipment in industries like mining, chemicals, and building materials, are often used to crush brittle or medium-hard materials. The hammer, its core working component, experiences frequent wear and tear during the high-speed impact, shearing, and extrusion process, making it the most susceptible to wear and tear. Improving hammer life is crucial to reducing equipment operating costs and maintenance workload.

[0003] Since the hammer head impacts, shears and squeezes the material at high speed during operation, the crushing area where the hammer head contacts the material should have good wear resistance and high hardness. Since the hammer head rotates at high speed, the connection area between the hammer head and the hammer handle should have good toughness and mechanical strength to ensure that it can withstand the centrifugal inertia force of the hammer head during rotation and the impact of large materials.

[0004] Therefore, two methods are commonly used to prepare hammer heads at present. The first method uses a single metal forming to prepare the hammer head, that is, the material of the crushing area and the connecting area of ​​the hammer head is the same, but in order to ensure the overall strength and toughness, ordinary cast steel or ordinary cast iron is usually used. However, ordinary cast steel or ordinary cast iron has poor wear resistance and it is difficult to ensure the overall working life of the hammer head. If high-chromium cast iron wear-resistant materials with good wear resistance are used, the overall strength and toughness of the hammer head cannot be guaranteed. Therefore, in order to solve the defects of the first hammer head, the second method of bimetallic process is derived to prepare the hammer head, that is, the crushing area of ​​the hammer head adopts high-chromium cast iron and other wear-resistant materials, and the connecting area of ​​the hammer head adopts high-chromium cast iron and other wear-resistant materials. Ordinary cast steel or ordinary cast iron is used for preparation. However, for the hammer head prepared in this way, if the temperature control of the interface fusion is poor at the junction of the two metals, the bonding surface is prone to loose bonding, which can easily cause the hammer head crushing area to fall off, thereby damaging the crusher. Moreover, since the connection area of ​​the hammer head is made of ordinary cast steel or ordinary cast iron, there is still a problem of poor wear resistance. Therefore, after long-term use, the connection area of ​​the hammer head is severely worn. Although this hammer head can ensure the wear resistance of the upper wear-prone area of ​​the working part, due to the poor wear resistance of the two metal junctions and the base part, severe wear often occurs, causing the waist of the hammer head to be worn through, and there is a risk of the hammer head breaking. Summary of the Invention

[0005] The purpose of the present invention is to provide a crusher composite hammer head and a preparation method of the crusher composite hammer head, which not only takes into account the overall toughness, strength and wear resistance, but also has higher connection strength, reduces the probability of breakage, and increases service life.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] In one aspect, a crusher composite hammer is provided, comprising:

[0008] A connecting base, the connecting base being connected to the hammer handle, the connecting base being provided with a first anti-slip structure at one end thereof facing away from the hammer handle in a first direction, the connecting base being provided with impact areas in contact with the material on both sides thereof in a second direction, the impact areas being provided with a second anti-slip structure, and the connecting base being further provided with an anti-slip through hole extending through the first anti-slip structure in a third direction;

[0009] The hammer working part is cast from a wear-resistant material on the outside of the connecting base, and anti-slip ribs are formed in the anti-slip through hole. The first anti-slip structure and the second anti-slip structure are both embedded in the hammer working part. The connecting base is provided with one end of the first anti-slip structure, and the impact areas on both sides of the connecting base are both covered in the hammer working part.

[0010] Optionally, the first anti-slip structure includes a first extension portion and a first limiting portion, the first extension portion penetrates into the hammer head working portion along the first direction, the first limiting portion is arranged on both sides of the first extension portion along the second direction, and protrudes in a direction away from the first extension portion, and the anti-slip through hole passes through the first extension portion.

[0011] Optionally, the impact zones on both sides of the connecting base along the second direction are each provided with a plurality of the second anti-slip structures, and the plurality of the second anti-slip structures are evenly distributed along the first direction.

[0012] Optionally, the second anti-slip structure includes a second extension portion and a second limiting portion, one end of the second extension portion is connected to the connecting base, the other end of the second extension portion is connected to the second limiting portion, and the diameter of the second limiting portion is larger than the diameter of the second extension portion.

[0013] Optionally, a bearing boss is provided at one end of the connecting base away from the first anti-slip structure along the first direction, and the bearing boss is provided on both sides of the connecting base along the second direction. A bearing groove for accommodating the working part of the hammer head is provided on the side of the bearing boss facing the second anti-slip structure.

[0014] Optionally, a stop protrusion is provided at one end of the connecting base away from the first anti-slip structure along the first direction. The stop protrusion is provided on both sides of the bearing boss along the second direction and extends in a direction away from the connecting base.

[0015] Optionally, the crusher composite hammer head further includes a plurality of reinforcing core bars, and the plurality of reinforcing core bars are embedded in the working part of the hammer head.

[0016] Optionally, the connecting base is further provided with a plug-in groove and a connecting through hole, the plug-in groove is provided at the end of the connecting base away from the first anti-detachment structure, the connecting through hole passes through the connecting base along the third direction and is connected to the plug-in groove, the plug-in groove is used to accommodate the hammer handle, and the connecting through hole is used to accommodate a pin connecting the hammer handle and the connecting base.

[0017] On the other hand, a method for preparing a composite hammer head for a crusher is provided. The method for preparing a composite hammer head for a crusher is used to prepare the composite hammer head for a crusher as described in any one of the above items. The method for preparing a composite hammer head for a crusher comprises the following steps:

[0018] S1. Prepare the connecting base by a casting process using a material with good strength and toughness, and polish, sandblast, and remove rust from the joint surface between the connecting base and the hammer working part after casting to make the joint surface clean and metallic;

[0019] S2. Prepare multiple reinforcing core strips according to size requirements;

[0020] S3, manufacturing a casting mold according to the outer dimensions of the hammer working part, and fixing the prepared connecting base and the reinforcing core strip at set positions in the casting mold;

[0021] S4, preheating the casting mold to raise the temperature of the casting mold, the connection matrix and the reinforcement core strip to 900° C.;

[0022] S5, injecting molten steel made of a wear-resistant material at a pouring temperature of 1700° C. into the casting mold and cooling it naturally. After the molten steel solidifies and forms, the connecting base, the reinforcing core bar, and the hammer working part are connected as a whole to form the crusher composite hammer;

[0023] S6. heat treating the cooled composite hammer of the crusher.

[0024] Optionally, step S6 further includes the following steps:

[0025] S61, heating the cooled composite hammer of the crusher to 750° C. and keeping the temperature for two hours;

[0026] S62, continue heating to 1000°C and keep warm for three hours;

[0027] S63, quenching at 950°C;

[0028] S64, after quenching, temper at 300℃;

[0029] S65, leaving the crusher composite hammer head to stand still to allow it to cool naturally.

[0030] Beneficial effects of the present invention:

[0031] The present invention provides a composite hammer head for a crusher. The composite hammer head for a crusher is formed by casting a hammer working part made of a wear-resistant material on the outside of a connecting base body used for connecting to a hammer handle, and making one end of the connecting base body provided with a first anti-slip structure and the impact areas on both sides of the connecting base body be covered in the hammer working part, so that the hammer working part is used to protect the connecting base body, and prevent the connecting base body from being broken due to long-term wear caused by contact between the material and the connecting base body, thereby retaining the strength and toughness of the connecting base body itself, and taking into account the wear resistance by casting the hammer working part on the outside of the connecting base body. The hammer head has a high-speed impact, shearing and extrusion property, so that when working, the hammer head working part protects the part that is subjected to high-speed impact, shearing and extrusion between the hammer head as a whole and the material, thereby reducing wear and improving service life. In addition, the first anti-slip structure and the second anti-slip structure embedded in the hammer head working part and the anti-slip ribs formed in the anti-slip through hole ensure that in addition to the intermolecular bonding force between the connection base and the hammer head working part during fusion, the first anti-slip structure, the second anti-slip structure and the anti-slip ribs formed in the anti-slip through hole are used to further improve the connection strength between the hammer head working part and the connection base.

[0032] The present invention also provides a method for preparing a crusher composite hammer head. The crusher composite hammer head made by the crusher composite hammer head preparation method forms a hammer head working part by embedding a connecting matrix with good strength and toughness into an integral casting mold, heating it to a critical temperature, and using molten steel with good wear resistance for secondary casting, thereby ensuring that the formed crusher composite hammer head takes into account the overall toughness, strength and wear resistance, and the connection strength between the hammer head working part and the connecting matrix after casting is ensured by the intermolecular bonding force during fusion, the first anti-slip structure, the second anti-slip structure, and the anti-slip ribs formed in the anti-slip through hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a structural assembly diagram of the composite hammer head of the crusher provided by the present invention;

[0034] Figure 2 This is a structural cross-sectional view of the composite hammer head of the crusher provided by the present invention from a first perspective;

[0035] Figure 3 This is a structural cross-sectional view of the composite hammer head of the crusher provided by the present invention from a second perspective;

[0036] Figure 4 This is a schematic structural diagram of the connecting base in the composite hammer head of the crusher provided by the present invention;

[0037] Figure 5 This is a structural cross-sectional view of the connecting base in the composite hammer head of the crusher provided by the present invention;

[0038] Figure 6 It is a structural schematic diagram of the connection between the composite hammer head and the hammer handle of the crusher provided by the present invention.

[0039] In the picture:

[0040] 100, hammer handle; 200, pin;

[0041] 1. Connecting base; 11. First anti-slip structure; 111. First extension; 112. First limiting portion; 12. Second anti-slip structure; 121. Second extension; 122. Second limiting portion; 13. Anti-slip through hole; 14. Bearing boss; 15. Bearing groove; 16. Stopping protrusion; 17. Insertion groove; 18. Connecting through hole;

[0042] 2. Hammer working part; 21. Anti-debonding reinforcement;

[0043] 3. Strengthen the core strip. DETAILED DESCRIPTION

[0044] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0045] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0046] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0047] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0048] Hammer crushers, as crucial process equipment in industries like mining, chemicals, and building materials, are often used to crush brittle or medium-hard materials. The hammer, its core working component, experiences frequent wear and tear during the high-speed impact, shearing, and extrusion process, making it the most susceptible to wear and tear. Improving hammer life is crucial to reducing equipment operating costs and maintenance workload.

[0049] Since the hammer head impacts, shears and squeezes the material at high speed during operation, the crushing area where the hammer head contacts the material should have good wear resistance and high hardness. Since the hammer head rotates at high speed, the connection area between the hammer head and the hammer handle should have good toughness and mechanical strength to ensure that it can withstand the centrifugal inertia force of the hammer head during rotation and the impact of large materials.

[0050] Therefore, two methods are commonly used to prepare hammer heads at present. The first method uses a single metal forming to prepare the hammer head, that is, the material of the crushing area and the connecting area of ​​the hammer head is the same, but in order to ensure the overall strength and toughness, ordinary cast steel or ordinary cast iron is usually used. However, ordinary cast steel or ordinary cast iron has poor wear resistance and it is difficult to ensure the overall working life of the hammer head. If high-chromium cast iron wear-resistant materials with good wear resistance are used, the overall strength and toughness of the hammer head cannot be guaranteed. Therefore, in order to solve the defects of the first hammer head, the second method of bimetallic process is derived to prepare the hammer head, that is, the crushing area of ​​the hammer head adopts high-chromium cast iron and other wear-resistant materials, and the connecting area of ​​the hammer head adopts high-chromium cast iron and other wear-resistant materials. Ordinary cast steel or ordinary cast iron is used for preparation. However, for the hammer head prepared in this way, if the temperature control of the interface fusion is poor at the junction of the two metals, the bonding surface is prone to loose bonding, which can easily cause the hammer head crushing area to fall off, thereby damaging the crusher. Moreover, since the connection area of ​​the hammer head is made of ordinary cast steel or ordinary cast iron, there is still a problem of poor wear resistance. Therefore, after long-term use, the connection area of ​​the hammer head is severely worn. Although this hammer head can ensure the wear resistance of the upper wear-prone area of ​​the working part, due to the poor wear resistance of the two metal junctions and the base part, severe wear often occurs, causing the waist of the hammer head to be worn through, and there is a risk of the hammer head breaking.

[0051] Therefore, in order to take into account the overall toughness, strength and wear resistance, ensure that the overall connection strength is high, reduce the probability of breakage, and increase service life, this embodiment provides a crusher composite hammer head.

[0052] like Figures 1 to 6 As shown, the composite hammer head of the crusher includes a connecting base 1 and a hammer working part 2, the connecting base 1 is connected to the hammer handle 100, and the connecting base 1 is provided with a first anti-slip structure 11 at one end away from the hammer handle 100 along the first direction, and the connecting base 1 is provided with impact areas in contact with the material on both sides along the second direction, and the impact areas are provided with a second anti-slip structure 12. The connecting base 1 is also provided with an anti-slip through hole 13 that passes through the first anti-slip structure 11 along the third direction. The hammer working part 2 is cast from a wear-resistant material on the outside of the connecting base 1, and an anti-slip rib 21 is formed in the anti-slip through hole 13. The first anti-slip structure 11 and the second anti-slip structure 12 are both embedded in the hammer working part 2, and the end of the connecting base 1 provided with the first anti-slip structure 11 and the impact areas on both sides of the connecting base 1 are all covered in the hammer working part 2.

[0053] The composite hammer head of the crusher is formed by casting a hammer working part 2 made of wear-resistant material on the outside of the connecting base 1 used for connecting with the hammer handle 100, and making the end of the connecting base 1 provided with the first anti-slip structure 11 and the impact areas on both sides of the connecting base 1 are all covered in the hammer working part 2, so that the hammer working part 2 is used to protect the connecting base 1, avoiding the material from contacting the connecting base 1 and causing the connecting base 1 to break due to long-term wear, thereby retaining the strength and toughness of the connecting base 1 itself, and taking into account the wear resistance by casting the hammer working part 2 on the outside of the connecting base 1, so that when working, The hammer working part 2 protects the part of the hammer head that is subjected to high-speed impact, shearing and extrusion between the entire hammer head and the material, reduces wear and improves service life, and through the first anti-slip structure 11 and the second anti-slip structure 12 embedded in the hammer working part 2 and the anti-slip rib 21 formed in the anti-slip through hole 13, it is ensured that in addition to the intermolecular bonding force between the connecting base 1 and the hammer working part 2 during fusion, the first anti-slip structure 11, the second anti-slip structure 12 and the anti-slip rib 21 formed in the anti-slip through hole 13 are further used to improve the connection strength between the hammer working part 2 and the connecting base 1.

[0054] In this embodiment, in order to ensure that the connecting base 1 has good strength and toughness, the connecting base 1 is made of tempered steel, such as 35CrMo, and in order to ensure that the hammer working part 2 has good wear resistance, the hammer working part 2 is made of nickel-chromium-molybdenum high-chromium alloy wear-resistant material.

[0055] Alternatively, as Figure 2 、 Figure 4As shown, the first anti-slip structure 11 includes a first extension portion 111 and a first limiting portion 112. The first extension portion 111 penetrates into the hammer working portion 2 along the first direction. The first limiting portion 112 is arranged on both sides of the first extension portion 111 along the second direction and protrudes in a direction away from the first extension portion 111. The anti-slip through hole 13 passes through the first extension portion 111.

[0056] The first extension portion 111 penetrates deep into the hammer working portion 2, increasing the contact area between the two, thereby improving the bonding force, and making the first limiting portion 112 protrude on both sides of the first extension portion 111, like a "claw", limiting the displacement of the hammer working portion 2 to prevent it from loosening, thereby improving the connection strength between the hammer working portion 2 and the connecting base 1, and effectively avoiding the separation of the hammer working portion 2 and the connecting base 1 when the crusher runs at high speed and frequently impacts the material, further extending the service life of the crusher's composite hammer, reducing the risk of equipment failure due to component detachment, and ensuring the continuity and safety of the crushing operation.

[0057] The shape of the first limiting portion 112 can be freely designed according to needs. For example, the protrusion of the first limiting portion 112 can be designed into a special shape such as a sawtooth shape or a wave shape to further increase the friction and mechanical engagement with the hammer working part 2. In this embodiment, the first limiting portion 112 is triangular.

[0058] Furthermore, if Figure 2 、 Figure 4 As shown, the cross-sectional area of ​​the first extension portion 111 gradually decreases as the distance into the hammer working portion 2 increases. This forms a wedge-shaped structure between the first extension portion 111 and the hammer working portion 2. During the casting process, as the material of the hammer working portion 2 solidifies and shrinks, it will exert a greater clamping force on the first extension portion 111, further enhancing the tightness of the connection between the two. When the crusher composite hammer is working, the gradually shrinking cross-sectional area can enable a more even force transmission, effectively dispersing stress concentration, and avoiding damage to the connection parts due to excessive local stress, thereby improving the reliability and durability of the first anti-slip structure 11, ensuring that under long-term and complex crushing conditions, the hammer working portion 2 and the connection base 1 always maintain a stable connection, thereby improving the stability and safety of the overall operation of the crusher.

[0059] Alternatively, as Figure 4 As shown, the impact areas on both sides of the connection base 1 along the second direction are provided with a plurality of second anti-slip structures 12 , and the plurality of second anti-slip structures 12 are evenly distributed along the first direction.

[0060] By providing multiple, evenly distributed second anti-slip structures 12 in the impact zone, the areas of the composite hammer most susceptible to wear and impact are targeted and strengthened. On the one hand, this increases the connection strength between the impact zone and the hammer's working portion 2, effectively preventing the hammer's working portion 2 from falling off the connection base 1 due to frequent impacts when crushing materials. On the other hand, the mechanical engagement formed by the multiple second anti-slip structures 12, combined with the wear-resistant hammer's working portion 2, greatly enhances the wear resistance of the impact zone, dissipates the stress caused by material impact, and avoids localized premature wear or damage. This not only extends the service life of the composite hammer, but also reduces equipment maintenance costs, ensuring the stable operation of the crusher under high-intensity operations.

[0061] The number of the second anti-slip structures 12 provided on the impact zone can be freely set according to demand. In this embodiment, three second anti-slip structures 12 are provided on each impact zone.

[0062] Furthermore, if Figure 4 As shown, the second anti-slip structure 12 includes a second extension portion 121 and a second limiting portion 122, one end of the second extension portion 121 is connected to the connecting base 1, and the other end of the second extension portion 121 is connected to the second limiting portion 122, and the diameter of the second limiting portion 122 is larger than the diameter of the second extension portion 121.

[0063] By inserting the second extension portion 121 into the hammer working part 2, the contact area with the material of the hammer working part 2 is increased, and the bonding force between the two is enhanced. The second limiting portion 122 with a larger diameter acts as a stop structure. After casting, it is wrapped by the material of the hammer working part 2. During the operation of the crusher, it can effectively limit the movement of the hammer working part 2 and prevent it from detaching from the connecting base 1. This structural design allows the second anti-detachment structure 12 to effectively disperse stress under the impact force generated by the crushed material, avoiding local excessive force. This greatly improves the stability of the overall structure of the composite hammer, reduces the risk of the hammer working part 2 falling off, extends the service life of the composite hammer, reduces the frequency of equipment downtime and maintenance due to component failure, and ensures the efficient and continuous operation of the crushing operation.

[0064] Among them, multiple second anti-slip structures 12 can be combined and arranged to form an array anti-slip structure to meet the needs of different crushing working conditions. In this embodiment, three second anti-slip structures 12 are arranged in a linear array.

[0065] Alternatively, as Figure 4 As shown, a bearing boss 14 is provided at one end of the connecting base 1 away from the first anti-slip structure 11 along the first direction, and the bearing boss 14 is provided on both sides of the connecting base 1 along the second direction. A bearing groove 15 for accommodating the hammer head working part 2 is provided on the side of the bearing boss 14 facing the second anti-slip structure 12.

[0066] The arrangement of the bearing bosses 14 and bearing slots 15 provides a stable mounting base and support structure for the hammer working portion 2. The bearing bosses 14 are located on both sides of the connecting base 1, increasing the contact area with the hammer working portion 2. This effectively disperses the impact force on the hammer during crushing operations and reduces the risk of excessive localized stress on the connecting base 1. The bearing slots 15 precisely position the hammer working portion 2, securing it during the casting process. This ensures the precision of the connection between the hammer working portion 2 and the connecting base 1, limits its displacement during use, and enhances the stability of the overall structure.

[0067] The shape of the bearing boss 14 can be freely designed according to needs, such as arc, trapezoidal and other shapes, to better disperse stress. In this embodiment, the bearing boss 14 is arc-shaped, and anti-slip grooves or raised structures can be added in the bearing groove 15 to further increase the friction between the hammer working part 2 and the bearing groove 15, and improve the connection strength between the hammer working part 2 and the connecting base 1.

[0068] Alternatively, as Figure 4 As shown, a stop protrusion 16 is provided at one end of the connection base 1 away from the first anti-slip structure 11 along the first direction. The stop protrusion 16 is provided on both sides of the supporting boss 14 along the second direction and extends in a direction away from the connection base 1.

[0069] By providing a resisting protrusion 16 and utilizing the resisting protrusion 16 to cooperate with the hammer working part 2, the area with a smaller width of the connecting base 1 is protected. Although the resisting protrusion 16 has poor wear resistance, its thickness is relatively large, so that when the material comes into contact, it preferentially contacts the resisting protrusion 16 with a larger thickness and the hammer working part 2, thereby avoiding wear of the smaller width part of the connecting base 1, thereby extending the service life of the crusher composite hammer.

[0070] Alternatively, as Figure 2 As shown, the composite hammer head of the crusher further includes a plurality of reinforcing core bars 3 , which are embedded in the working part 2 of the hammer head.

[0071] By embedding multiple reinforcing core bars 3 within the hammer working section 2, the overall performance of the hammer working section 2 is significantly improved. The reinforcing core bars 3 can effectively enhance the structural strength and toughness of the hammer working section 2, sharing the impact force exerted on the hammer working section 2 during material crushing, and reducing cracking or damage to the hammer working section 2 caused by stress concentration. Under different operating conditions, the reinforcing core bars 3 can specifically improve the load-bearing capacity of specific parts of the hammer according to the force characteristics, thereby extending the service life of the hammer working section 2. Furthermore, the presence of the reinforcing core bars 3 can also, to a certain extent, improve the wear resistance of the hammer, reduce the wear rate, and reduce the frequency and cost of equipment maintenance, ensuring efficient and stable crushing operations.

[0072] In this embodiment, the reinforcing core strip 3 is a metal-based ceramic-reinforced granular alloy wear-resistant strip to achieve superior strength and wear resistance. The cross-sectional shape of the reinforcing core strip 3 can be freely set as required, such as rectangular, circular, or polygonal. In this embodiment, the cross-sectional shape of the reinforcing core strip 3 is rectangular.

[0073] Alternatively, as Figure 2 As shown, the connecting base 1 is further provided with an inserting groove 17 and a connecting through hole 18. The inserting groove 17 is provided at one end of the connecting base 1 away from the first anti-slip structure 11. The connecting through hole 18 passes through the connecting base 1 along the third direction and is connected with the inserting groove 17. The inserting groove 17 is used to accommodate the hammer handle 100, and the connecting through hole 18 is used to accommodate the pin 200 connecting the hammer handle 100 and the connecting base 1.

[0074] The design of the insertion groove 17 and the connecting through-hole 18 provides a reliable and stable connection between the connecting base 1 and the hammer handle 100. The hammer handle 100 is secured within the insertion groove 17 by means of a pin 200 passing through the connecting through-hole 18. This effectively transmits the impact force and torque during the crushing process, ensuring that the hammer head does not loosen or fall off during high-speed rotation and frequent impacts on materials, thereby improving the safety and stability of the equipment's operation. This connection method also facilitates the installation and removal of the hammer head. When the hammer head becomes worn and needs to be replaced, the pin 200 can be quickly removed, the old hammer head removed, and a new one installed, significantly shortening equipment downtime for maintenance, reducing maintenance costs, and improving production efficiency. Furthermore, the pin 200 connection method can also cushion the impact force to a certain extent, reducing damage to the hammer handle 100 and extending the service life of the hammer handle 100.

[0075] In this embodiment, a method for preparing a crusher composite hammer is also provided. The method for preparing a crusher composite hammer is used to prepare the above-mentioned crusher composite hammer. The method for preparing a crusher composite hammer comprises the following steps:

[0076] S1. Prepare the connection base 1 by casting process using a material with good strength and toughness, and polish and sandblast the joint surface between the connection base 1 and the hammer working part 2 after casting to make the joint surface clean and metallic;

[0077] S2. Prepare multiple reinforcing core strips 3 according to size requirements;

[0078] S3. Manufacturing a casting mold according to the dimensions of the hammer working portion 2, and fixing the prepared connection base 1 and the reinforcement core strip 3 at the set positions in the casting mold;

[0079] S4, preheating the casting mold to raise the temperature of the casting mold, the connecting matrix 1 and the reinforcing core strip 3 to 900° C.;

[0080] S5, pouring molten steel made of wear-resistant material at a pouring temperature of 1700°C into the casting mold and cooling it naturally. After the molten steel solidifies and forms, the connecting base 1, the reinforcing core bar 3 and the hammer working part 2 are connected as a whole to form a crusher composite hammer;

[0081] S6. Heat-treating the cooled composite hammer of the crusher.

[0082] The crusher composite hammer head made by the preparation method of the crusher composite hammer head is formed by embedding a connecting matrix 1 with good strength and toughness into an integral casting mold, heating it to a critical temperature, and using molten steel with good wear resistance for secondary casting to form a hammer head working part 2, thereby ensuring that the formed crusher composite hammer head takes into account the overall toughness, strength and wear resistance, and the connection strength between the hammer head working part 2 and the connecting matrix 1 after casting is ensured by the intermolecular bonding force during fusion and the first anti-slip structure 11, the second anti-slip structure 12 and the anti-slip rib 21 formed in the anti-slip through hole 13.

[0083] In this embodiment, in step S1 , when casting the connection base 1 , a coated sand mold or a lost foam mold is used for casting, wherein the connection base 1 is made of 35CrMo quenched and tempered steel, and the molten steel is high chromium cast iron molten steel.

[0084] Optionally, step S6 further includes the following steps:

[0085] S61, heating the cooled crusher composite hammer to 750°C and keeping the temperature for two hours;

[0086] S62, continue heating to 1000°C and keep warm for three hours;

[0087] S63, quenching at 950°C;

[0088] S64, after quenching, temper at 300℃;

[0089] S65. Leave the crusher's composite hammer head to cool naturally.

[0090] Heat treatment of the crusher's composite hammer significantly improves its overall performance. Holding it at 750°C for two hours eliminates residual stresses generated during the hammer's initial processing and stabilizes its internal structure. Heating it to 1000°C for three hours promotes the full dissolution and diffusion of alloying elements, homogenizing the internal composition and structure. Quenching at 950°C imparts a martensitic structure to the hammer, significantly increasing its hardness and strength, enhancing its wear resistance and impact resistance when crushing materials. Tempering at 300°C effectively eliminates internal stresses generated during quenching, reduces brittleness, improves toughness, and prevents brittle fracture of the hammer during use.

[0091] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Crusher composite hammer head, characterized by: The crusher composite hammer head comprises: A connecting base (1), the connecting base (1) is connected to the hammer handle (100), a first anti-slip structure (11) is provided at one end of the connecting base (1) away from the hammer handle (100) along a first direction, impact areas contacting the material are provided on both sides of the connecting base (1) along a second direction, a second anti-slip structure (12) is provided on the impact areas, and the connecting base (1) is further provided with an anti-slip through hole (13) penetrating the first anti-slip structure (11) along a third direction; A hammer working part (2) is cast from a wear-resistant material on the outside of the connecting base (1), and an anti-slip rib (21) is formed in the anti-slip through hole (13); the first anti-slip structure (11) and the second anti-slip structure (12) are both embedded in the hammer working part (2); the connecting base (1) is provided with one end of the first anti-slip structure (11), and the impact areas on both sides of the connecting base (1) are both covered in the hammer working part (2).

2. The crusher composite hammer according to claim 1, characterized in that: The first anti-slip structure (11) comprises a first extension portion (111) and a first limiting portion (112), wherein the first extension portion (111) extends deep into the hammer head working portion (2) along the first direction, and the first limiting portion (112) is provided on both sides of the first extension portion (111) along the second direction and protrudes in a direction away from the first extension portion (111), and the anti-slip through hole (13) passes through the first extension portion (111).

3. The composite hammer head of the crusher according to claim 1, characterized in that: The impact zones on both sides of the connection base (1) along the second direction are each provided with a plurality of the second anti-slip structures (12), and the plurality of the second anti-slip structures (12) are evenly distributed along the first direction.

4. The crusher composite hammer according to claim 3, characterized in that: The second anti-slip structure (12) comprises a second extension portion (121) and a second limiting portion (122), one end of the second extension portion (121) is connected to the connecting base (1), and the other end of the second extension portion (121) is connected to the second limiting portion (122), and the diameter of the second limiting portion (122) is greater than the diameter of the second extension portion (121).

5. The composite hammer head of the crusher according to claim 1, characterized in that: A bearing boss (14) is provided at one end of the connecting base (1) away from the first anti-slip structure (11) along the first direction, and the bearing boss (14) is provided on both sides of the connecting base (1) along the second direction. A bearing groove (15) for accommodating the hammer head working part (2) is provided on the side of the bearing boss (14) facing the second anti-slip structure (12).

6. The composite hammer head of the crusher according to claim 5, characterized in that: An end of the connecting base (1) away from the first anti-slip structure (11) along the first direction is provided with a stop protrusion (16), and the stop protrusion (16) is provided on both sides of the supporting boss (14) along the second direction and extends in a direction away from the connecting base (1).

7. The crusher composite hammer according to claim 1, characterized in that: The crusher composite hammer head further comprises a plurality of reinforcing core bars (3), wherein the plurality of reinforcing core bars (3) are embedded in the hammer head working part (2).

8. The crusher composite hammer according to claim 1, characterized in that: The connecting base (1) is further provided with a plug-in groove (17) and a connecting through hole (18); the plug-in groove (17) is provided at one end of the connecting base (1) away from the first anti-slip structure (11); the connecting through hole (18) passes through the connecting base (1) along the third direction and is communicated with the plug-in groove (17); the plug-in groove (17) is used to accommodate the hammer handle (100); and the connecting through hole (18) is used to accommodate a pin (200) connecting the hammer handle (100) and the connecting base (1).

9. A method for preparing a composite hammer head for a crusher, characterized in that: The method for preparing the crusher composite hammer is used to prepare the crusher composite hammer according to any one of claims 1 to 8, and the method for preparing the crusher composite hammer comprises the following steps: S1. The connecting base (1) is prepared by a casting process using a material with good strength and toughness, and the bonding surface between the connecting base (1) and the hammer head working part (2) after casting is polished, sandblasted, and rust removed to make the bonding surface clean and metallic; S2. preparing a plurality of reinforcing core strips (3) according to size requirements; S3, manufacturing a casting mold according to the external dimensions of the hammer head working part (2), and fixing the prepared connecting base (1) and the reinforcing core strip (3) at set positions in the casting mold; S4, preheating the casting mold to raise the temperature of the casting mold together with the connection matrix (1) and the reinforcement core strip (3) to 900° C.; S5, injecting molten steel made of wear-resistant material at a pouring temperature of 1700° C. into the casting mold and cooling it naturally, and after the molten steel solidifies and forms, the connecting base (1), the reinforcing core bar (3) and the hammer working part (2) are connected as a whole to form the crusher composite hammer; S6. heat treating the cooled composite hammer of the crusher.

10. The method for preparing a composite hammer head for a crusher according to claim 9, characterized in that: Step S6 also includes the following steps: S61, heating the cooled composite hammer of the crusher to 750° C. and keeping the temperature for two hours; S62, continue heating to 1000°C and keep warm for three hours; S63, quenching at 950°C; S64, after quenching, temper at 300℃; S65, leaving the crusher composite hammer head to stand still to allow it to cool naturally.

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