Cutting ring of concrete pump truck and its manufacturing method, concrete pump truck

Abstract

This invention relates to the field of engineering machinery technology, specifically to a cutting ring for a concrete pump truck, its manufacturing method, and the concrete pump truck itself. The cutting ring for the concrete pump truck includes: a ring body, circular in shape with a cutting surface at one end, and multiple annular grooves arranged from the inside out on the cutting surface; an alloy ring, fixedly disposed in one of the annular grooves; and a wear-resistant ring, fixedly disposed in the annular grooves on the inner and / or outer side of the alloy ring. This invention provides a first wear-resistant ring, an alloy ring, and a second wear-resistant ring on the cutting surface of the ring body. The first and second wear-resistant rings have good wear resistance and toughness, effectively improving the wear resistance and impact resistance of the cutting surface during long-term reciprocating cutting, preventing premature wear and failure of the cutting ring's base material, greatly extending the durability and service life of the cutting ring, and effectively solving the problem of insufficient structural strength leading to poor reliability in the cutting ring structure of existing concrete pump trucks.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery technology, specifically to a cutting ring for a concrete pump truck, its manufacturing method, and the concrete pump truck itself. Background Technology

[0002] During the operation of a concrete pump truck, the cutting ring and the spectacle plate undergo a reciprocating alternating cutting motion. Since the pumping time of a concrete pump truck is usually long, the cutting ring, as a key wear-resistant and vulnerable part on the concrete pump truck, not only needs to have good wear resistance, but also needs to have good impact resistance.

[0003] Currently, existing cutting rings generally use a metal matrix with an alloy ring brazed on the end face of the cutting ring to improve its wear resistance. However, the alloy ring generally has poor toughness and is prone to cracking and falling off under long-term impact. This causes the poorly wear-resistant steel matrix to come into direct contact with the spectacle plate and concrete materials, leading to premature failure of the cutting ring. Therefore, existing cutting rings also have the problem of insufficient structural strength, resulting in poor reliability. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect of poor reliability caused by insufficient structural strength of the cutting ring of the concrete pump truck in the prior art, thereby providing a cutting ring of the concrete pump truck and its manufacturing method, as well as the concrete pump truck.

[0005] To address the aforementioned problems, this invention provides a cutting ring for a concrete pump truck, comprising: a ring body, circular in shape with a cutting surface formed on one end face, the cutting surface being adapted to mate with the spectacle plate of the concrete pump truck, and a plurality of annular grooves arranged from the inside out on the cutting surface; an alloy ring, fixedly disposed in one of the annular grooves; and a wear-resistant ring, fixedly disposed in the annular grooves on the inner and / or outer sides of the alloy ring; wherein, when the wear-resistant ring is disposed on the inner side of the alloy ring, it is a first wear-resistant ring, and when the wear-resistant ring is disposed on the outer side of the alloy ring, it is a second wear-resistant ring.

[0006] Optionally, the first wear-resistant ring includes a first metal matrix and a first wear-resistant reinforcement. The first wear-resistant reinforcement is disposed on the inner ring surface of the first metal matrix and is formed by centrifugal casting of first wear-resistant particles onto the inner ring surface of the first metal matrix.

[0007] Optionally, the material of the first metal matrix is ​​aluminum, magnesium, titanium, iron, cobalt or nickel, and / or the material of the first wear-resistant reinforcement is at least one of alumina, zirconium oxide, tungsten carbide, titanium carbide, silicon carbide and silicon nitride.

[0008] Optionally, the second wear-resistant ring includes a second metal matrix and a second wear-resistant reinforcement. The second wear-resistant reinforcement is disposed on the outer ring surface of the second metal matrix and is formed by centrifugal casting of second wear-resistant particles onto the outer ring surface of the second metal matrix.

[0009] Optionally, the material of the second metal matrix is ​​aluminum, magnesium, titanium, iron, cobalt or nickel, and / or the material of the second wear-resistant reinforcement is at least one of alumina, zirconium oxide, tungsten carbide, titanium carbide, silicon carbide and silicon nitride.

[0010] Optionally, the thickness of the first wear ring is 1 mm to 5 mm, and / or the thickness of the second wear ring is 1 mm to 5 mm.

[0011] The present invention also provides a concrete pump truck, which includes: the cutting ring of the concrete pump truck described above.

[0012] The present invention also provides a method for manufacturing a cutting ring, comprising preparing a ring body, a first wear-resistant ring, a second wear-resistant ring, and an alloy ring; and fixing the first wear-resistant ring, the alloy ring, and the second wear-resistant ring to the inner ring groove, the middle ring groove, and the outer ring groove on the cutting surface of the ring body.

[0013] Optionally, the step of preparing the first wear-resistant ring includes: melting a first metal matrix to form a first liquid metal, adding first wear-resistant particles to the first liquid metal, and centrifugally infiltrating the first wear-resistant particles onto the inner ring surface of the first liquid metal to form the first wear-resistant ring.

[0014] Optionally, the step of preparing the second wear-resistant ring includes: melting a second metal matrix to form a second liquid metal, adding second wear-resistant particles to the second liquid metal, and centrifugally infiltrating the second wear-resistant particles onto the outer ring surface of the second liquid metal to form a second wear-resistant ring.

[0015] The present invention has the following advantages:

[0016] 1. A first wear-resistant ring, an alloy ring, and a second wear-resistant ring are set on the cutting surface of the ring body. The first and second wear-resistant rings have good wear resistance and toughness, which can effectively improve the wear resistance and impact resistance of the cutting surface during the long-term reciprocating cutting process of the cutting ring, avoid premature wear and failure of the cutting ring matrix, greatly extend the durability and service life of the cutting ring, and effectively solve the problem of poor reliability caused by insufficient structural strength of the cutting ring of concrete pump truck in the existing technology.

[0017] 2. The first wear-resistant reinforcement can be evenly filled into the inner side of the first wear-resistant ring through the centrifugal casting and infiltration process. The filling is more uniform and the strengthening effect is better, which makes the inner part of the first wear-resistant ring stronger and less prone to failure.

[0018] 3. The second wear-resistant reinforcement can be evenly filled to the outer side of the second wear-resistant ring through the centrifugal casting and infiltration process. The filling is more uniform and the strengthening effect is better, which makes the inner part of the second wear-resistant ring stronger and less prone to failure.

[0019] 4. The thickness of the first wear-resistant ring is 1mm to 5mm, and / or the thickness of the second wear-resistant ring is 1mm to 5mm. While ensuring the wear resistance and buffering effect of the first and second wear-resistant rings, their thickness is minimized as much as possible to reduce manufacturing costs. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 A cross-sectional schematic diagram of the cutting ring of a concrete pump truck according to an embodiment of the present invention is shown;

[0022] Figure 2 It shows Figure 1 A top view of the cutting ring of a concrete pump truck;

[0023] Figure 3 It shows Figure 1 A cross-sectional schematic diagram of the second wear-resistant ring of the cutting ring of a concrete pump truck;

[0024] Figure 4 It shows Figure 1 A cross-sectional schematic diagram of the first wear-resistant ring of the cutting ring of a concrete pump truck.

[0025] Explanation of reference numerals in the attached figures:

[0026] 10. Ring body; 20. First wear-resistant ring; 21. First wear-resistant reinforcement; 30. Second wear-resistant ring; 31. Second wear-resistant reinforcement; 40. Alloy ring; 50. Wear-resistant layer. Detailed Implementation

[0027] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0030] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] like Figures 1 to 4 As shown, the cutting ring of the concrete pump truck in this embodiment includes: a ring body 10, an alloy ring 40, and a wear-resistant ring. The ring body 10 is circular and one end face forms a cutting surface. The cutting surface is suitable for cooperating with the spectacle plate of the concrete pump truck. Multiple annular grooves are provided on the cutting surface from the inside to the outside. The alloy ring 40 is fixedly disposed in one of the annular grooves. The wear-resistant ring is fixedly disposed in the annular grooves on the inner side and / or the outer side of the alloy ring 40. When the wear-resistant ring is disposed on the inner side of the alloy ring 40, it is the first wear-resistant ring 20. When the wear-resistant ring is disposed on the outer side of the alloy ring 40, it is the second wear-resistant ring 30.

[0032] The cutting ring of the concrete pump truck using this embodiment has a first wear-resistant ring 20, an alloy ring 40, and a second wear-resistant ring 30 on the cutting surface of the ring body 10. The first wear-resistant ring 20 and the second wear-resistant ring 30 have good wear resistance and toughness, which can effectively improve the wear resistance and impact resistance of the cutting surface during the long-term reciprocating cutting process of the cutting ring, avoid premature wear and failure of the cutting ring matrix, greatly extend the durability and service life of the cutting ring, and effectively solve the problem of poor reliability caused by insufficient structural strength of the cutting ring of the concrete pump truck in the prior art.

[0033] It should be noted that providing only the first wear-resistant ring 20 or the second wear-resistant ring 30 on the cut surface of the ring body 10, or providing both the first wear-resistant ring 20 and the second wear-resistant ring 30 simultaneously, can improve the wear resistance and impact resistance of the cut surface to varying degrees. It is not limited to providing both the first wear-resistant ring 20 and the second wear-resistant ring 30 simultaneously.

[0034] Specifically, the base is forged from round steel and machined. The parameters of the round steel are not limited and can be varied according to the usage conditions. The alloy ring is composed of multiple alloy ring blocks. The specific composition of the alloy ring is not limited and can be changed according to the requirements. The depth of the middle ring groove is shallower than the depth of the inner ring groove and the outer ring groove. Since the first wear-resistant ring 20 and the second wear-resistant ring 30 will be the main components subjected to friction and impact for a long time, the inner ring groove and the outer ring groove are deeper in order to make the first wear-resistant ring 20 and the second wear-resistant ring 30 more securely fixed.

[0035] In this embodiment, the first wear-resistant ring 20 includes a first metal matrix and a first wear-resistant reinforcement 21. The first wear-resistant reinforcement 21 is disposed on the inner ring surface of the first metal matrix. The first wear-resistant reinforcement 21 is formed by centrifugal casting and infiltration of first wear-resistant particles onto the inner ring surface of the first metal matrix. Through the centrifugal casting and infiltration process, the first wear-resistant reinforcement 21 can uniformly fill the inner side of the first wear-resistant ring 20, resulting in more uniform filling and better reinforcement. This makes the inner part of the first wear-resistant ring 20 stronger and less prone to failure. Therefore, even when the first wear-resistant ring 20 is used alone, the wear resistance and impact resistance of the cut surface can still be improved. It can be understood that, as an alternative implementation, the inner and outer layers of the first wear-resistant ring 20 can also be manufactured separately and then fixed together using a fixing process to form the first wear-resistant ring 20.

[0036] Specifically, centrifugal infiltration utilizes the ability of molten metal to penetrate into external objects, forming an infiltrated layer on the outer surface of the casting, thereby improving the surface properties of the casting.

[0037] In this embodiment, the first metal matrix is ​​made of aluminum, magnesium, titanium, iron, cobalt or nickel, and / or the first wear-resistant reinforcement is made of at least one of alumina, zirconium oxide, tungsten carbide, titanium carbide, silicon carbide and silicon nitride. The materials are relatively common, which makes the first wear-resistant ring 20 perform better while reducing manufacturing costs.

[0038] Specifically, there are no restrictions on the material of the first metal matrix and the material of the first wear-resistant particles. Different types of metals are used for the first metal matrix, and their densities are also different. During the centrifugal casting process, the density of the first metal matrix will affect the movement and distribution of the first wear-resistant particles. Therefore, the material of the first metal matrix can be selected according to the material of the first wear-resistant particles used.

[0039] In this embodiment, the second wear-resistant ring 30 includes a second metal matrix and a second wear-resistant reinforcement 31. The second wear-resistant reinforcement 31 is disposed on the outer ring surface of the second metal matrix. The second wear-resistant reinforcement 31 is formed by centrifugal casting and infiltration of second wear-resistant particles onto the outer ring surface of the second metal matrix. Through the centrifugal casting and infiltration process, the second wear-resistant reinforcement 31 can uniformly fill the outer side of the second wear-resistant ring 30, resulting in more uniform filling and better reinforcement. This makes the outer portion of the second wear-resistant ring 30 stronger and less prone to failure. Therefore, even when the second wear-resistant ring 30 is used alone, the wear resistance and impact resistance of the cut surface can still be improved. It is understood that, as an alternative implementation, the inner and outer layers of the second wear-resistant ring 30 can also be manufactured separately and then fixed together using a fixing process to form the second wear-resistant ring 30.

[0040] In this embodiment, the material of the second metal matrix is ​​aluminum, magnesium, titanium, iron, cobalt or nickel, and / or the material of the second wear-resistant reinforcement is at least one of alumina, zirconium oxide, tungsten carbide, titanium carbide, silicon carbide and silicon nitride. The materials are relatively common, which makes the second wear-resistant ring 30 perform better while reducing manufacturing costs.

[0041] In this embodiment, the thickness of the first wear-resistant ring 20 is 1mm to 5mm, and / or the thickness of the second wear-resistant ring 30 is 1mm to 5mm. While ensuring the wear resistance and buffering effect of the first wear-resistant ring 20 and the second wear-resistant ring 30, their thickness is minimized as much as possible, thereby reducing manufacturing costs.

[0042] In this embodiment, a wear-resistant layer 50 is also included. The inner and outer peripheral walls of the ring 10 are both provided with a wear-resistant layer 50. The wear-resistant layer 50 is formed by coating the inner and outer peripheral walls of the ring 10 with powder or particles containing wear-resistant components. This can effectively prevent the inner and outer peripheral walls of the ring 10 from directly contacting the concrete, thereby reducing the wear of the ring 10.

[0043] The present invention also provides a concrete pump truck, which includes: the cutting ring of the concrete pump truck described above.

[0044] Specifically, the concrete pump truck includes a spectacle plate, and the cutting ring of the concrete pump truck works in conjunction with the spectacle plate to perform reciprocating cutting.

[0045] The present invention also provides a method for manufacturing a cutting ring, comprising preparing a ring body 10, a first wear-resistant ring 20, a second wear-resistant ring 30, and an alloy ring 40; and fixing the first wear-resistant ring 20, the alloy ring 40, and the second wear-resistant ring 30 into the inner ring groove, the middle ring groove, and the outer ring groove on the cutting surface of the ring body 10.

[0046] In this embodiment, the step of preparing the alloy ring 40 includes: preparing a plurality of alloy ring blocks, and splicing multiple alloy ring blocks together to form the alloy ring 40.

[0047] Specifically, the first wear-resistant ring 20, the alloy ring 40, and the second wear-resistant ring 30 are fixed to the corresponding ring grooves by high-temperature brazing, with the brazing temperature ranging from 900 degrees to 1200 degrees.

[0048] In this embodiment, the step of preparing the first wear-resistant ring 20 includes: melting the first metal matrix to form a first liquid metal, adding the first wear-resistant particles to the first liquid metal, and centrifugally infiltrating the first wear-resistant particles onto the inner ring surface of the first liquid metal to form a first wear-resistant reinforcement 21. The good infiltration effect results in a more uniform wear-resistant layer.

[0049] In this embodiment, in the step of preparing the first wear-resistant ring 20, the first metal matrix is ​​one of aluminum, magnesium, titanium, iron, cobalt or nickel, the first wear-resistant particles are at least one of alumina, zirconium oxide, tungsten carbide, titanium carbide, silicon carbide, and silicon nitride, the average particle size of the first wear-resistant particles is 100um to 300um or the average particle size of the first wear-resistant particles is 500um to 1000um and the mass fraction is 20% to 80%, the casting temperature of centrifugal casting is 650 degrees to 1700 degrees, the preheating temperature of centrifugal casting is 150 degrees to 500 degrees, and the rotation speed of centrifugal casting is 750 r / min to 1100 r / min.

[0050] In this embodiment, the step of preparing the second wear-resistant ring 30 includes: melting the second metal matrix to form a second liquid metal, adding the second wear-resistant particles to the second liquid metal, and centrifugally casting the second wear-resistant particles onto the outer ring surface of the second liquid metal to form the second wear-resistant ring 30.

[0051] Specifically, during the centrifugal casting process, wear-resistant particles are cast together with molten liquid metal. The first wear-resistant ring 20 and the second wear-resistant ring 30 utilize the density difference between the liquid metal and the wear-resistant particles to cause the wear-resistant particles to move towards the inside or outside of the mold under the action of centrifugal force, thereby forming a casting-infiltrated composite layer on the outer or inner surface of the ring casting. When the density of the wear-resistant particles is less than the density of the molten metal, the wear-resistant particles move inward; when the density of the wear-resistant reinforcing particles is greater than the density of the molten metal, the wear-resistant particles move outward.

[0052] In this embodiment, the step of preparing the second wear-resistant ring 30, which involves melting the second metal matrix and adding the second wear-resistant particles to form the second wear-resistant ring 30 by centrifugal casting, includes: the second metal matrix being one of aluminum, magnesium, titanium, iron, cobalt, or nickel; the second wear-resistant particles being at least one of alumina, zirconium oxide, tungsten carbide, titanium carbide, silicon carbide, and silicon nitride; the average particle size of the second wear-resistant particles being 100 μm to 300 μm or the average particle size of the second wear-resistant particles being 500 μm to 1000 μm and the mass fraction being 20% ​​to 80%; the casting temperature of the centrifugal casting being 650 degrees to 1700 degrees; the preheating temperature of the centrifugal casting being 150 degrees to 500 degrees; and the rotation speed of the centrifugal casting being 750 r / min to 1100 r / min.

[0053] Specifically, if the first and second wear-resistant particles are too small, they will have difficulty moving in the molten metal and will be difficult to fill evenly, and will easily cause excessive dissolution of the wear-resistant particles. If the first and second wear-resistant particles are too large, their distribution effect and performance will be affected. Therefore, during centrifugal casting infiltration, attention should be paid to controlling the particle size distribution of the first and second wear-resistant particles. When the first and second wear-resistant particles are granules, their particle size is generally 500 to 1000 μm, and when they are powders, their particle size is generally 100 to 300 μm. In order to ensure that the wear-resistant particles or powder can fully fill the inner side of the first wear-resistant ring 20 or the outer side of the second wear-resistant ring 30 during centrifugal casting infiltration, the content of the first and second wear-resistant particles needs to be calculated according to the specific dimensions of the first wear-resistant ring 20 and the second wear-resistant ring 30, which is generally 20% to 80%.

[0054] In this embodiment, wear-resistant alloy powder is deposited onto the inner and outer walls of the ring 10 to form a wear-resistant layer 50.

[0055] The following is an example illustrating the manufacturing method of the cutting ring in this embodiment:

[0056] Experimental Example 1:

[0057] Ring 10 is formed by machining a 35 forged steel blank; the first wear-resistant ring 20 uses cobalt metal as the metal matrix, and titanium carbide powder with an average particle size of 300 μm and a mass fraction of 50% is added to the molten cobalt metal, and centrifugally cast and infiltrated under the conditions of a casting temperature of 1550 degrees, a preheating temperature of 300 degrees, and a rotation speed of 1000 r / min; the second wear-resistant ring 30 uses cobalt metal as the metal matrix, and titanium carbide powder with an average particle size of 300 μm is added to the molten cobalt metal. Tungsten carbide powder with a mass fraction of 80% was centrifugally cast and infiltrated at a casting temperature of 1550 degrees Celsius, a preheating temperature of 300 degrees Celsius, and a rotation speed of 1000 r / min. Alloy rings were prepared by powder metallurgy and spliced ​​into an alloy ring 40. The first wear-resistant ring 20, the second wear-resistant ring 30, and the alloy ring 40 were brazed into the ring body 10 at a high temperature of 1100 degrees Celsius. High-chromium iron-based alloy powder was deposited onto the inner and outer walls of the ring body 10 to form a wear-resistant layer 50.

[0058] Experimental Example 2:

[0059] Ring 10 is formed by machining a 45 forged steel blank; the first wear-resistant ring 20 uses nickel metal as the metal matrix, and alumina particles with an average particle size of 800 μm and a mass fraction of 40% are added to molten cobalt metal, and centrifugally cast and infiltrated under the conditions of a casting temperature of 1500 degrees, a preheating temperature of 250 degrees, and a rotation speed of 800 r / min; the second wear-resistant ring 30 uses nickel metal as the metal matrix, and alumina particles with an average particle size of 800 μm are added to molten cobalt metal. Zirconia particles with a mass fraction of 60% are centrifugally cast and infiltrated at a casting temperature of 700 degrees Celsius, a preheating temperature of 200 degrees Celsius, and a rotation speed of 900 r / min. Alloy rings are prepared by powder metallurgy and spliced ​​into an alloy ring 40. The first wear-resistant ring 20, the second wear-resistant ring 30, and the alloy ring 40 are brazed and embedded into the ring body 10 at a high temperature of 1000 degrees Celsius. Tungsten carbide reinforced nickel-based alloy powder is deposited onto the inner and outer walls of the ring body 10 to form a wear-resistant layer 50.

[0060] Test Examples 3 to 5:

[0061] For detailed parameters, please refer to Table 2 below.

[0062] The performance of the cutting ring, the first wear-resistant ring 20 manufactured in Test Examples 1 to 5, and the second wear-resistant ring 30 in the prior art were tested using the performance test methods in Table 1 below.

[0063] Table 1

[0064]

[0065] It should be noted that in φ6.2*15, 15 refers to the height of the sample being 15mm, and in 50*5*5, the length, width, and height of the sample are 50mm, 5mm, and 5mm respectively.

[0066] The test results of the cutting ring, the first wear-resistant ring 20 manufactured in Test Example 1 and Test Example 2 in the prior art are as follows:

[0067] Existing cutting ring technology: wear-resistant layer 50, abrasive wear 10mg to 20mg, impact toughness <2J / cm 2 ;

[0068] Example 1: Cutting ring; abrasive wear of wear-resistant reinforcement 21 or wear-resistant reinforcement 31 is 3mg, impact toughness is 10J / cm. 2 Compared to existing cutting rings, this new type offers 3 times the wear resistance, 5 times the impact resistance, and over 50% longer service life. It should be noted that when the particle size distribution of the first and second wear-resistant particles is between 100µm and 300µm, and their content is between 20% and 80%, the filling effect of the first and second wear-resistant particles can be guaranteed. This ensures that the abrasive wear of the wear-resistant reinforcement 21 or 31 of the first and second wear-resistant rings 20 and 30 is ≤5mg, and the overall impact toughness of the first and second wear-resistant rings 20 and 30 is ≥8J / cm². 2 .

[0069] Example 2: Cutting ring; abrasive wear of wear-resistant reinforcement 21 or wear-resistant reinforcement 31: 5mg; impact toughness: 12J / cm. 2 Compared to existing cutting rings, this new type offers twice the wear resistance, six times the impact resistance, and over 40% longer service life. It should be noted that when the particle size distribution of the first and second wear-resistant particles is 500µm to 1000µm and their content is 20% to 80%, the filling effect of the first and second wear-resistant particles can be guaranteed. This ensures that the abrasive wear of the wear-resistant reinforcement 21 or 31 of the first and second wear-resistant rings 20 and 30 is ≤10mg, and the overall impact toughness of the first and second wear-resistant rings 20 and 30 is ≥10J / cm². 2 .

[0070] Table 2

[0071]

[0072]

[0073]

[0074]

[0075] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0076] 1. A first wear-resistant ring 20, an alloy ring 40, and a second wear-resistant ring 30 are provided on the cutting surface of the ring body 10. The first wear-resistant ring 20 and the second wear-resistant ring 30 have good wear resistance and toughness, which can effectively improve the wear resistance and impact resistance of the cutting surface during the long-term reciprocating cutting process of the cutting ring, prevent the base of the cutting ring from wearing out prematurely and failing, and greatly extend the durability and service life of the cutting ring.

[0077] 2. The first wear-resistant ring 20 and the second wear-resistant ring 30 are reinforced metal matrix composite rings with added wear-resistant particles, which effectively improves the wear resistance of the inner side of the first wear-resistant ring 20 and the outer side of the second wear-resistant ring 30, and also improves the impact resistance of the entire wear-resistant ring, so that the wear resistance and impact resistance of the first wear-resistant ring 20 and the second wear-resistant ring 30 are improved together.

[0078] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A cutting ring for a concrete pump truck, characterized in that, include: The ring body (10) is circular and has a cut surface at one end. The cut surface is adapted to fit with the spectacle plate of the concrete pump truck. Multiple annular grooves are provided on the cut surface from the inside to the outside. An alloy ring (40) is fixedly disposed in one of the ring grooves; The first wear-resistant ring (20) is fixedly disposed on the inner side of the alloy ring (40). The first wear-resistant ring (20) includes a first metal matrix and a first wear-resistant reinforcement (21). The first wear-resistant reinforcement (21) is disposed on the inner ring surface of the first metal matrix. The material of the first metal matrix is ​​aluminum, magnesium, titanium, iron, cobalt or nickel, and / or the material of the first wear-resistant reinforcement is at least one of alumina, zirconium oxide, tungsten carbide, titanium carbide, silicon carbide and silicon nitride. The second wear-resistant ring (30) is fixedly disposed on the outside of the alloy ring (40). The second wear-resistant ring (30) includes a second metal matrix and a second wear-resistant reinforcement (31). The second wear-resistant reinforcement (31) is disposed on the outer ring surface of the second metal matrix. The material of the second metal matrix is ​​aluminum, magnesium, titanium, iron, cobalt or nickel, and / or the material of the second wear-resistant reinforcement is at least one of alumina, zirconium oxide, tungsten carbide, titanium carbide, silicon carbide and silicon nitride.

2. The cutting ring of the concrete pump truck according to claim 1, characterized in that, The first wear-resistant reinforcement (21) is formed on the inner ring surface of the first metal matrix by centrifugal casting of the first wear-resistant particles.

3. The cutting ring of the concrete pump truck according to any one of claims 1 to 2, characterized in that, The second wear-resistant reinforcement (31) is formed on the outer ring surface of the second metal matrix by centrifugal casting of the second wear-resistant particles.

4. The cutting ring of the concrete pump truck according to any one of claims 1 to 2, characterized in that, The thickness of the first wear ring (20) is 1 mm to 5 mm, and / or the thickness of the second wear ring (30) is 1 mm to 5 mm.

5. A concrete pump truck, characterized in that, include: The cutting ring of the concrete pump truck according to any one of claims 1 to 4.

6. A method for manufacturing a cutting ring, characterized in that, Prepare a ring body (10), a first wear-resistant ring (20), a second wear-resistant ring (30), and an alloy ring (40); The first wear-resistant ring (20), the alloy ring (40), and the second wear-resistant ring (30) are fixed to the inner ring groove, the middle ring groove, and the outer ring groove on the cut surface of the ring body (10); The steps for preparing the first wear-resistant ring (20) include: melting a first metal matrix to form a first liquid metal, adding first wear-resistant particles to the first liquid metal, and centrifugally casting the first wear-resistant particles onto the inner ring surface of the first liquid metal to form the first wear-resistant ring (20); The steps for preparing the second wear-resistant ring (30) include: melting a second metal matrix to form a second liquid metal, adding second wear-resistant particles to the second liquid metal, and centrifugally casting the second wear-resistant particles onto the outer ring surface of the second liquid metal to form the second wear-resistant ring (30).

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