Cutting ring for concrete pump vehicle, manufacturing method thereof, and concrete pump vehicle

Abstract

The present disclosure relates to a cutting ring for a concrete pump vehicle, a manufacturing method thereof, and a concrete pump vehicle. The cutting ring for a concrete pump vehicle includes an annular base material (10) and an abrasion-resistant layer, the annular base material (10) includes an abrasion-prone portion, the abrasion-resistant layer is disposed on the abrasion-prone portion, and the abrasion-resistant layer and the base material (10) are integrally molded by casting. According to the present disclosure, the abrasion-resistant layer disposed on the abrasion-prone portion of the base material is integrally molded with the base material by casting, and the abrasion-resistant layer is integrated with the base material during the molding process. Therefore, the abrasion-resistant layer is firmly bonded to the base material and is not easily peeled off. This significantly extends the service life of the cutting ring.

Description

[Technical field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This disclosure is based on and claims priority to China Patent Application Publication No. 202111203865.4, filed on October 15, 2021, the disclosure of which is incorporated herein by reference in its entirety.

[0002] Field The present disclosure relates to the technical field of earth moving machinery, and in particular to a cutting ring for a concrete pump vehicle, a manufacturing method thereof, and a concrete pump vehicle. [Background technology]

[0003] The cutting ring is a key component for concrete pump trucks. During the pumping process, the gap plate and the cutting ring move back and forth alternately to realize the suction and delivery of materials. The cutting ring requires not only good wear resistance but also a certain degree of impact resistance. Compared with the gap plate, the cutting ring is more easily worn and has a shorter service life.

[0004] In order to improve the service life of cutting rings, most cutting rings in the existing industry are made using a method in which a hard alloy is fitted into a steel substrate, such as single alloy + inner hole build-up weld, dual alloy + inner hole build-up weld, or all alloy. Some cutting rings use diamond material.

[0005] In order to improve the wear resistance, the method of fitting hard alloys into the steel base material is adopted. Single alloys, binary alloys, or full alloys are obtained by combining the steel base material with hard alloys by copper brazing. Part of the gap between the base material and the copper brazing has low wear resistance. After wearing, the hard alloy is exposed and is prone to cracking, crumbling, falling off, and other problems when impacted. The non-wear-resistant steel base material directly contacts the concrete material, causing slurry leakage into the concrete during transportation, and resulting in early serious damage of the cutting ring. This requires stoppage for maintenance and replacement of parts, which seriously affects the progress of construction.

[0006] In addition, from the viewpoint of manufacturing process, there are many manufacturing procedures for cutting rings with alloy inlay structure, which include punching steel substrate → overlaying → alloy groove cutting → alloy plate matching → brazing → alloy surface grinding → drilling → inspection, so the manufacturing period is long. Moreover, the cost of hard alloy is high, accounting for 80% of the total price of the cutting ring, which is disadvantageous to the promotion of industrialization.

[0007] Please note that the information disclosed in the technical section of the background of this disclosure is intended only to enhance understanding of the overall background of this disclosure, and is not to be considered as an admission or suggestion in any way that this information organization is prior art known to those skilled in the art. Summary of the Invention [Means for solving the problem]

[0008] An embodiment of the present disclosure is to provide a cutting ring for a concrete pump vehicle, a manufacturing method thereof, and a concrete pump vehicle, so as to effectively extend the service life of the cutting ring.

[0009] According to a first aspect of the present disclosure, there is provided a cutting ring for a concrete pump vehicle, the cutting ring comprising: An annular base material having a wear-prone portion; An abrasion-resistant layer disposed on the abrasion-prone portion; Equipped with The wear-resistant layer and the base material are integrally formed by casting.

[0010] In some embodiments, the wear-prone portion comprises a first end surface of the matrix perpendicular to an axial direction of the matrix, the first end surface being provided with a groove, and the wear-resistant layer comprises a first wear-resistant layer, the first wear-resistant layer being disposed in the groove.

[0011] In some embodiments, the grooves are disposed circumferentially about the base material such that the first wear resistant layer is annular.

[0012] In some embodiments, the wear-prone portion comprises a first annular surface on an inner periphery of the matrix and a second annular surface on an outer periphery of the matrix, and the wear-resistant layer comprises a second wear-resistant layer and a third wear-resistant layer, the second wear-resistant layer being disposed inwardly of the first annular surface and the third wear-resistant layer being disposed outwardly of the second annular surface.

[0013] In some embodiments, the second and third wear-resistant layers are both annular.

[0014] In some embodiments, the base material comprises a first portion having a first line segment, and a second portion and a third portion located on two sides of the first portion, respectively. The first line segment passes through the center of the circle of the base material, and the two end points of the first line segment are both located on the periphery of the base material. The type of material of the wear-resistant layer located in the first portion is the same as or different from the type of material of the wear-resistant layer located in the second portion. The type of material of the wear-resistant layer located in the first portion is the same as or different from the type of material of the wear-resistant layer located in the third portion.

[0015] In some embodiments, the type of material of the wear-resistant layer located in the second portion is the same as or different from the type of material of the wear-resistant layer located in the third portion.

[0016] In some embodiments, the total arc length of the first portion is greater than the sum of the arc length of the second portion and the arc length of the third portion.

[0017] In some embodiments, the total arc length of the first portion is twice the sum of the arc length of the second portion and the arc length of the third portion.

[0018] According to a second aspect of the present disclosure, there is provided a concrete pump vehicle including the above-mentioned cutting ring for a concrete pump vehicle.

[0019] According to a third aspect of the present disclosure, there is provided a method for manufacturing a cutting ring for a concrete pump vehicle, the method comprising: Providing an annular base material model and a wear-resistant material; Coating a wear-resistant material onto a wear-prone portion of the base model; Injecting a molten base material liquid into the base material model coated with the wear-resistant material, the base material model is melted by heating, and a cutting ring is integrally formed by casting the base material liquid and the wear-resistant material; Includes.

[0020] In some embodiments, the wear-resistant material comprises Al2O3 wear-resistant particles, WC wear-resistant particles, or a mixture of Al2O3 and WC wear-resistant particles.

[0021] In some embodiments, the wear-resistant material comprises a mixture of Al2O3 wear-resistant particles and WC wear-resistant particles, in which the mass fraction ratio of Al2O3 wear-resistant particles to WC wear-resistant particles is 1:1 or 4:6.

[0022] In some embodiments, the base material model includes a first portion having a first line segment, and a second portion and a third portion located on two sides of the first portion, respectively, the first line segment passing through a center of a circle of the base material model, and two end points of the first line segment are both located on a periphery of the base material model, and the step of coating the wear-resistant material on the wear-prone portion of the base material model includes: The method includes coating a first wear-resistant material onto a first portion of the base material model and coating a second wear-resistant material onto a second portion and a third portion, wherein the first wear-resistant material and the second wear-resistant material are the same or different in type.

[0023] In some embodiments, the manufacturing method includes, before coating the wear-resistant material onto the wear-prone portion of the base model, Drying the wear-resistant material in advance in an oven, the drying temperature is set to 180°C to 300°C, the warming time is 1.5h to 3h, and then cooling to room temperature; adding an adhesive to the wear-resistant material; Includes.

[0024] In some embodiments, the step of coating the wear-resistant material onto the wear-prone portion of the base material model comprises: The method includes the step of coating a wear-resistant material onto a wear-prone portion of the base material model, the coating thickness being 0.5mm-1.5mm thicker than a preset thickness, the preset thickness being the thickness of the wear-resistant layer at the corresponding position of the finished cutting ring.

[0025] In some embodiments, the coating thickness of the wear-resistant material is between 4 mm and 8 mm.

[0026] In some embodiments, the step of injecting a molten base material liquid into a base material model coated with a wear-resistant material, where the base material model is melted by heating and a cutting ring is integrally formed by casting the base material liquid and the wear-resistant material, comprises: The temperature of the furnace is increased to 1500°C-1550°C to melt the base material liquid containing the elements Fe, Cr, C and Mn, and after the base material liquid is completely melted, the base material model is cast at a melting temperature of 1480°C-1520°C to melt the base material model after encountering the base material liquid, and the base material liquid and the wear-resistant material are integrated by casting; obtaining a cut ring blank when the casting is cooled to 840°C-900°C, and then machining the cut ring blank to obtain a finished cut ring; Includes.

[0027] Based on the above technical solutions, in several embodiments of the present disclosure, the wear-resistant layer disposed on the wear-prone portion of the base material is integrally molded with the base material by casting. That is, the wear-resistant layer and the base material are cast together. In the molding process, the wear-resistant layer and the base material are integrated. Therefore, the wear-resistant layer is firmly bonded to the base material, and is not easy to peel off. This greatly extends the service life of the cutting ring.

[0028] Other features and advantages of the present disclosure will become apparent from the following detailed description of several examples of the present disclosure with reference to the drawings.

[0029] In order to more clearly describe the embodiments of the present disclosure or the technical solutions in the prior art, the embodiments or drawings that need to be used in the description of the prior art are briefly introduced. Obviously, the drawings in the following description are only the embodiments of the present disclosure, and those skilled in the art can also obtain other drawings according to the drawings provided without ingenuity. [Brief description of the drawings]

[0030] [Figure 1] FIG. 2 is a front view of one embodiment of a cutting ring for a concrete pump vehicle of the present disclosure; [Diagram 2] FIG. 2 is a cross-sectional view taken along section AA in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0031] Next, the technical solutions in each embodiment will be clearly and completely described in combination with the drawings of each embodiment of the present disclosure. Obviously, the described embodiments are only some embodiments of the present disclosure, but not all embodiments. Based on each embodiment of the present disclosure, all other embodiments made by those skilled in the art without inventive ideas are all included in the protection scope of the present disclosure.

[0032] In describing the present disclosure, it should be understood that the directions or positional relationships indicated by the terms "center," "transverse," "longitudinal," "front," "back," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer" are based on the orientations or positional relationships shown in the drawings, and are not intended to indicate or imply that the device referred to must exhibit a particular orientation, but are merely for ease of description of the present disclosure, and need to be constructed and operated in a particular orientation, as cannot be understood to limit the scope of protection of the present disclosure.

[0033] As shown in Fig. 1 and Fig. 2, in some embodiments of the cutting ring for a concrete pump truck provided by the present disclosure, the cutting ring includes a base material 10 and a wear-resistant layer. A through hole is provided in the center of the base material 10, and the base material 10 is annular as a whole. The base material 10 includes a wear-resistant portion. The wear-resistant layer is disposed on the wear-resistant portion. The wear-resistant layer and the base material 10 are integrally molded by casting.

[0034] In the above embodiment, the wear-resistant layer disposed on the wear-prone portion of the base material 10 and the base material 10 are integrally molded by casting. That is, the wear-resistant layer and the base material 10 are cast together. In this molding process, the wear-resistant layer and the base material 10 are integrated. Therefore, the wear-resistant layer is firmly bonded to the base material 10 and is not likely to peel off. This greatly extends the service life of the cutting ring.

[0035] Compared with the technical solutions of the related art in which the wear-resistant layer is embedded into the base material, the wear-resistant layer in the embodiment of the cutting ring provided by the present disclosure is more stable and reliable, and the wear-resistant layer is firmly bonded to the base material, so it is not easy to peel off, thus greatly extending the service life of the cutting ring.

[0036] In some embodiments, the wear-prone portion comprises a first end surface of the matrix 10 perpendicular to an axial direction of the matrix 10. A groove is provided in the first end surface. The wear-resistant layer comprises a first wear-resistant layer 20. The first wear-resistant layer 20 is provided in the groove.

[0037] The concrete pump vehicle includes a spectacles that are matched with the cutting ring. The first end face is an end face of the cutting ring that is close to one side of the spectacles. A first wear-resistant layer 20 is provided on the first end face to improve the wear resistance of the first end face. When matched with the spectacles, the wear resistance of the first end face is improved, which plays an important role in improving the service life of the entire cutting ring.

[0038] In some embodiments, the grooves are disposed circumferentially about the base material 10 such that the first wear resistant layer 20 is annular.

[0039] The grooves are annular and arranged in the circumferential direction of the base material 10. As a result, the first wear-resistant layer 20 is annular, and therefore the axial end face of the base material 10 is protected over the entire circumferential direction.

[0040] In some embodiments, the wear-prone portion comprises a first annular surface on the inner periphery of the matrix 10 and a second annular surface on the outer periphery of the matrix 10. The wear-resistant layer comprises a second wear-resistant layer 30 and a third wear-resistant layer 40. The second wear-resistant layer 30 is disposed on the inner side of the first annular surface and the third wear-resistant layer 40 is disposed on the outer side of the second annular surface.

[0041] By disposing the second wear resistant layer 30 on the inside of the first annular surface and the third wear resistant layer 40 on the outside of the second annular surface, the radially outer and inner sides of the cut ring can be protected.

[0042] In some embodiments, both the second wear-resistant layer 30 and the third wear-resistant layer 40 are annular, which provides full circumferential protection for the outer and inner radial sides of the cut ring.

[0043] In some embodiments, the base material 10 comprises a first portion 11 having a first line segment, and a second portion 12 and a third portion 13 located on two sides of the first portion 11, respectively. The first line segment passes through the center of the circle of the base material 10, and the two end points of the first line segment are both located on the periphery of the base material 10. The type of material of the wear-resistant layer located in the first portion 11 is the same as or different from the type of material of the wear-resistant layer located in the second portion 12. The type of material of the wear-resistant layer located in the first portion 11 is the same as or different from the type of material of the wear-resistant layer located in the third portion 13.

[0044] The base material 10 is divided into a first portion 11, a second portion 12, and a third portion 13. The type of material of the wear-resistant layer located in the first portion 11 is set to be the same as or different from the types of materials of the wear-resistant layers located in the second portion 12 and the third portion 13. The wear resistance of the first portion 11 is the same as or different from the wear resistance of the second portion 12 and the third portion 13.

[0045] The use of multiple different wear-resistant materials in different areas facilitates improving the wear resistance of the working surfaces while reducing the wear resistance requirements of the non-working surfaces, thus saving costs.

[0046] As shown in Fig. 1, the first portion 11 has two arc-shaped segments on the left and right. The second portion 12 has an arc-shaped segment located above the first portion 11, and the third portion 13 has an arc-shaped segment located below the first portion. The first line segment is a diameter of the outer circle of the base material 10. The outer circle is a circle having the maximum diameter of the base material 10. In Fig. 1, the first line segment is a horizontal diameter.

[0047] In some embodiments, the first line segment is disposed horizontally, and the wear resistance of the wear-resistant layer located in the first portion 11 is greater than the wear resistance of the wear-resistant layers located in the second portion 12 and the third portion 13 .

[0048] When the cutting ring is in a working state, the first line segment can be arranged horizontally, so that the first portion 11 is located in the center, the second portion 12 is located above the first portion 11, and the third portion 13 is located below the first portion 11. This allows the first portion 11, which is more susceptible to wear, to have higher wear resistance when matched with the spectacle plate, thereby extending the service life of the cutting ring. Compared with the first portion 11, the second portion 12 and the third portion 13 are less susceptible to wear, so that a wear-resistant material with a relatively low wear resistance can be used for cost saving.

[0049] In some embodiments, the material type of the wear-resistant layer located in the second portion 12 is the same as or different from the material type of the wear-resistant layer located in the third portion 13. The materials of the wear-resistant layers located in the second portion 12 and the third portion 13 can be freely selected according to the actual wear situation.

[0050] In some embodiments, the total arc length of the first portion 11 is greater than the sum of the arc length of the second portion 12 and the arc length of the third portion 13. By increasing the total arc length of the first portion 11, the coverage area of ​​the first portion 11 is expanded, and the area of ​​the highly wear-resistant region is enlarged, so that the overall wear resistance of the cutting ring is effectively improved.

[0051] In some embodiments, the total arc length of the first portion 11 is twice the sum of the arc length of the second portion 12 and the arc length of the third portion 13. This setting can cover the most wear-prone portion of the cutting ring and is highly applicable.

[0052] The present disclosure provides a concrete pump vehicle equipped with the above-mentioned cutting ring for a concrete pump vehicle.

[0053] The present disclosure provides a method for manufacturing a cutting ring for a concrete pump vehicle, the method comprising: Providing an annular base material model and a wear-resistant material; Coating a wear-resistant material onto a wear-prone portion of the base model; Injecting a molten base material liquid into the base material model coated with the wear-resistant material, the base material model is melted by heating, and a cutting ring is integrally formed by casting the base material liquid and the wear-resistant material; Includes.

[0054] The matrix model may be made of a material that melts when heated so that the matrix model melts when the matrix raw material liquid is poured in. The matrix raw material liquid is formed according to the shape of the matrix model. For example, the matrix model may be made of foam or other materials.

[0055] The base material raw material liquid may be a liquid in which all elements are metallic elements, for example, a liquid containing the elements Fe, Cr, C, and Mn. The base material raw material liquid may also be a liquid containing carbon and metallic elements. The base material is a carbon steel material such as Q345.

[0056] In some embodiments, the wear-resistant material comprises one or more wear-resistant particles. Wear-resistant materials having a preset wear resistance can be prepared by employing one or more wear-resistant particles as needed to avoid wasting or reducing wear resistance.

[0057] In some embodiments, the wear-resistant material comprises Al2O3 wear-resistant particles, WC wear-resistant particles, or a mixture of Al2O3 and WC wear-resistant particles.

[0058] In some embodiments, the wear-resistant material comprises a mixture of Al2O3 wear-resistant particles and WC wear-resistant particles, wherein the mass fraction ratio of Al2O3 wear-resistant particles to WC wear-resistant particles in the mixture is 1:1 or 4:6.

[0059] In some embodiments, the base material model includes a first portion 11 having a first line segment, and a second portion 12 and a third portion 13 located on two sides of the first portion 11, respectively. The first line segment passes through the center of the circle of the base material model, and both of the two end points of the first line segment are located on the outer circle of the base material model. The step of coating the wear-resistant material on the wear-prone portion of the base material model includes: The method includes coating a first wear-resistant material onto a first portion 11 of the base material model and coating a second wear-resistant material onto a second portion 12 and a third portion 13, the types of the first wear-resistant material and the second wear-resistant material being the same or different.

[0060] By coating different regions with different wear-resistant materials, different regions can have different wear resistances, and it is not necessary to coat every region with the highest wear resistance, which can avoid waste and improve production costs.

[0061] In some embodiments, the manufacturing method includes, before coating the wear-resistant material onto the wear-prone portion of the base model, drying the wear-resistant material in an oven in advance and then cooling it to room temperature, the drying temperature is set to 180°C to 300°C, and the warming time is 1.5h to 3h; adding an adhesive to the wear-resistant material; Further includes.

[0062] Pre-drying the wear-resistant material can prevent the wear-resistant material from having a high moisture content that can impair its stability during coating. The dried wear-resistant material is cooled to room temperature to avoid the adhesive ability of the adhesive when it is added in the future.

[0063] In some embodiments, the step of coating the wear-resistant material onto the wear-prone portion of the base material model comprises: The method includes the step of coating a wear-resistant material onto a wear-prone portion of the base material model, the coating thickness being 0.5mm to 1.5mm thicker than a preset thickness, the preset thickness being the thickness of the wear-resistant layer at the corresponding position of the finished cutting ring.

[0064] By setting the coating thickness to a preset thickness of 0.5 mm to 1 mm, such as 0.5 mm, 1 mm, and 1.5 mm, it is easy to improve the wear resistance while leaving some machining allowance.

[0065] In some embodiments, the coating thickness of the wear-resistant material is between 4 mm and 8 mm.

[0066] In some embodiments, the step of injecting a molten base material liquid into a base material model coated with a wear-resistant material, where the base material model is melted by heating and a cutting ring is integrally formed by casting the base material liquid and the wear-resistant material, comprises: The furnace temperature is raised to 1500°C-1550°C to melt the base material liquid containing the elements Fe, Cr, C, and Mn, and after the base material liquid is completely melted, casting is performed at a melting temperature of 1480°C-1520°C, the base material model melts after encountering the base material liquid, and the base material liquid and the wear-resistant material are integrated by casting; obtaining a cut ring blank when the casting is cooled to 840°C-900°C, and then further machining the cut ring blank to obtain a finished cut ring; Includes.

[0067] The following describes the steps of performing some embodiments of the manufacturing method of the cutting ring for a concrete pump vehicle of the present disclosure.

[0068] In some embodiments, a method for manufacturing a cutting ring for a concrete pump vehicle includes the following steps. Pretreatment of wear-resistant composite material. The raw material contains one or two of wear-resistant particles Al2O3 and WC with a particle size of 0.5mm~2mm. The wear-resistant particles are placed in an oven in advance, dried at a temperature of 180℃~300℃, and kept warm for 1h~3h. Then, it is cooled to room temperature. Preparation of wear-resistant composite material. Add adhesive to the above wear-resistant particles and stir evenly. Coat the obtained mixture on the groove, radial inner surface, and outer surface of the base foam model of the cutting ring. The thickness of this coating is 4mm-8mm, about 1mm higher than the base plane. It is used for machining allowance and strengthening wear resistance. Coat the coated surface of the wear-resistant composite cutting ring model with casting paint, then dry it, put it in a sand box in order, and prepare a sprue and a riser. Casting. A medium frequency induction furnace with a volume of 1 ton is used for melting. The base material is a metal solution, mainly containing the elements Fe, Cr, C, and Mn. The temperature is raised to 1500℃-1550℃, and after the metal solution is completely melted, casting is carried out at a temperature of 1480℃-1520℃. Sand removal and cooling. After the casting is cooled to 840℃~900℃, the sand is removed, the mold is washed, and the cut ring blank is obtained by natural cooling. During cooling, insulation treatment is performed. After that, the finished cut ring is obtained by machining as necessary.

[0069] During the casting process of the cutting ring produced by the manufacturing and preparation method provided by this embodiment, a small amount of metal solution can be infiltrated into the wear-resistant material. Therefore, the wear-resistant coating includes a wear-resistant composite formed by mixing wear-resistant particles with Fe, Cr, C, and Mn. The wear-resistant composite has a hardness of more than 60HRC, a wear rate of less than 0.03%, and a bending strength of more than 1700MPa. The wear-resistant layer is not easy to peel off because it is bonded to the base material by high-temperature casting to form the entire casting.

[0070] Next, some examples of cutting rings for concrete pump vehicles according to the present disclosure will be introduced.

[0071] In a first example, a method for manufacturing a cut ring includes the following steps. 1. Pretreatment of wear-resistant composite material. The raw material contained wear-resistant particles Al2O3 with a particle size of 0.5mm~2mm. The wear-resistant particles were placed in an oven in advance and dried at a temperature of 180℃~300℃, kept warm for 1.5h~3h, and then cooled to room temperature. 2. Preparation of wear-resistant composite material. The above wear-resistant particles Al2O3 were added with adhesive and stirred uniformly. The resulting mixture was coated on the groove of the base material foam model of the cutting ring. The thickness of this coating was 4mm-8mm, about 1mm higher than the base material plane. This was used for enhancing the machining allowance and wear resistance. The coated surface of the cutting ring model made of wear-resistant composite material was coated with casting paint, then dried and placed in a sand box in order, and a sprue and a riser were prepared. 3. Casting. A medium frequency induction furnace with a volume of 1 ton was used for melting. The base material was a metal solution, mainly containing the elements Fe, Cr, C, and Mn. The temperature was increased to 1500°C-1550°C, and after the metal solution was completely melted, casting was carried out at a temperature of 1480°C-1520°C. The base foam model of the cutting ring was melted by heating, and the metal solution was bonded to the wear-resistant composite by high-temperature injection to form the entire casting. 4. Sand removal and cooling. When the casting is cooled to 840℃-900℃, the sand is removed, the mold is washed, and the cut ring material is obtained by natural cooling. During cooling, insulation treatment is performed. After that, the finished cut ring is obtained by machining as necessary.

[0072] In the casting process of the cutting ring produced by the manufacturing and preparation method provided by this embodiment, a small amount of metal solution can be infiltrated into the wear-resistant material. Therefore, the wear-resistant coating includes a wear-resistant composite formed by mixing wear-resistant particles Al2O3 with Fe, Cr, C, and Mn. This wear-resistant composite has a hardness of over 80HRC and is suitable for granite sandstone.

[0073] In a second example, a method for manufacturing a cut ring includes the following steps. 1. Pretreatment of wear-resistant composite material. The raw material contained wear-resistant particles WC with a particle size of 0.5mm-2mm. The wear-resistant particles were placed in an oven in advance and dried at a temperature of 180℃-300℃, kept warm for 1.5h-3h, and then cooled to room temperature. 2. Preparation of wear-resistant composite material. The above wear-resistant particles WC were added with adhesive and stirred uniformly. The resulting mixture was coated on the groove of the base material foam model of the cutting ring. The thickness of this coating was 4mm-8mm, about 1mm higher than the base material plane. This was used for the purpose of enhancing the machining allowance and wear resistance. The coated surface of the cutting ring model made of wear-resistant composite material was coated with casting paint, then dried and placed in a sand box in order, and a sprue and a riser were prepared. 3. Casting. A medium frequency induction furnace with a volume of 1 ton was used for melting. The base material was a metal solution containing mainly the elements Fe, Cr, C, and Mn. The temperature was increased to 1500 ° C ~ 1550 ° C, and after the metal solution was completely melted, casting was carried out at a temperature of 1480 ° C ~ 1520 ° C. The base material foam model of the cutting ring was melted by heating, and the metal solution was bonded to the wear-resistant composite by high-temperature injection to form the entire casting. 4. Sand removal and cooling. When the casting is cooled to 840℃-900℃, the sand is removed, the mold is washed, and the cut ring material is obtained by natural cooling. During cooling, insulation treatment is performed. After that, the finished cut ring is obtained by machining as necessary.

[0074] The cutting ring manufactured by the manufacturing and preparation method provided by this embodiment is used. The wear-resistant coating includes a wear-resistant composite formed by mixing wear-resistant particles WC with Fe, Cr, C, and Mn. This wear-resistant composite has a hardness of over 65HRC and is suitable for conventional limestone mixes.

[0075] In a third example, a method for manufacturing a cut ring includes the following steps. 1. Pretreatment of wear-resistant composite material. The raw material contains wear-resistant particles Al2O3 and wear-resistant particles WC, each of which accounts for 50% by weight, with a particle size of 0.5mm to 2mm. These wear-resistant particles were placed in an oven in advance, dried at a temperature of 180℃ to 300℃, kept warm for 1.5h to 3h, and then cooled to room temperature. 2. Preparation of wear-resistant composite material. The above wear-resistant particles Al2O3 and wear-resistant particles WC were mixed, and the adhesive was added to this mixture and stirred uniformly. The resulting mixture was coated on the groove of the base material foam model of the cutting ring. The thickness of this coating was 4mm-8mm, about 1mm higher than the base material plane. This was used for the purpose of enhancing the machining allowance and wear resistance. The coated surface of the cutting ring model made of wear-resistant composite material was coated with casting paint, then dried and placed in a sand box in order, and a sprue and a riser were prepared. 3. Casting. A medium frequency induction furnace with a volume of 1 ton was used for melting. The base material was a metal solution, mainly containing the elements Fe, Cr, C, and Mn. The temperature was increased to 1500°C-1550°C, and after the metal solution was completely melted, casting was carried out at a temperature of 1480°C-1520°C. The base foam model of the cutting ring was melted by heating, and the metal solution was bonded to the wear-resistant composite by high-temperature injection to form the entire casting. 4. Sand removal and cooling. When the casting is cooled to 840℃-900℃, the sand is removed, the mold is washed, and the cut ring material is obtained by natural cooling. During cooling, insulation treatment is performed. After that, the finished cut ring is obtained by machining as necessary.

[0076] The cutting ring manufactured by the manufacturing and preparation method provided by this embodiment is used. The wear-resistant coating includes a wear-resistant composite formed by mixing wear-resistant particles Al2O3 and WC with Fe, Cr, C, and Mn. The wear-resistant composite has a hardness of over 70HRC and is suitable for conventional limestone and gravel-bearing sandstone mixtures.

[0077] In a fourth example, a method for manufacturing a cut ring includes the following steps. 1. Pretreatment of wear-resistant composite material. The raw material contained wear-resistant particles Al2O3 and wear-resistant particles WC, and the mass fraction ratio of wear-resistant particles Al2O3 to wear-resistant particles WC was 4:6. The particle size was 0.5mm to 2mm. The wear-resistant particles were placed in an oven in advance, dried at a temperature of 180℃ to 300℃, and kept warm for 1.5h to 3h. Then, they were cooled to room temperature. 2. Preparation of wear-resistant composite material. The above wear-resistant particles Al2O3 and wear-resistant particles WC were mixed, and the adhesive was added to this mixture and stirred uniformly. The resulting mixture was coated on the groove of the base material foam model of the cutting ring. The thickness of this coating was 4mm-8mm, about 1mm higher than the base material plane. This was used for the purpose of enhancing the machining allowance and wear resistance. The coated surface of the cutting ring model made of wear-resistant composite material was coated with casting paint, then dried and placed in a sand box in order, and a sprue and a riser were prepared. 3. Casting. A medium frequency induction furnace with a volume of 1 ton was used for melting. The base material was a metal solution, mainly containing the elements Fe, Cr, C, and Mn. The temperature was increased to 1500°C-1550°C, and after the metal solution was completely melted, casting was carried out at a temperature of 1480°C-1520°C. The base foam model of the cutting ring was melted by heating, and the metal solution was bonded to the wear-resistant composite by high-temperature injection to form the entire casting. 4. Sand removal and cooling. When the casting is cooled to 840℃-900℃, the sand is removed, the mold is washed, and the cut ring material is obtained by natural cooling. During cooling, insulation treatment is performed. After that, the finished cut ring is obtained by machining as necessary.

[0078] The cutting ring manufactured by the manufacturing and preparation method provided by this embodiment is used. The wear-resistant coating includes a wear-resistant composite formed by mixing wear-resistant particles Al2O3 and WC with Fe, Cr, C, and Mn. The wear-resistant composite has a hardness of over 67HRC and is suitable for conventional limestone and gravel-bearing sandstone mixtures.

[0079] In a fifth example, a method for manufacturing a cut ring includes the following steps. 1. Pretreatment of wear-resistant composite material. The raw materials included wear-resistant particles Al2O3 and wear-resistant particles WC, with particle sizes of 0.5mm to 2mm. The wear-resistant particles were placed in an oven in advance and dried at a temperature of 180℃ to 300℃. The particles were kept warm for 1.5h to 3h, and then cooled to room temperature. 2. Preparation of wear-resistant composite material. The above wear-resistant particles Al2O3 and wear-resistant particles WC were respectively added with adhesive and stirred uniformly. The grooves of the base material foaming model of the cutting ring located in the first part 11 were coated with wear-resistant particles WC, and the grooves of the base material foaming model of the cutting ring located in the second part 12 and the third part 13 were coated with wear-resistant particles Al2O3. The thickness of the coating was 4mm-8mm, about 1mm higher than the base material plane. This was used for the purpose of enhancing the machining allowance and wear resistance. The coated surface of the cutting ring model made of wear-resistant composite material was coated with casting paint, then dried and placed in a sand box in order, and a sprue and a riser were prepared. 3. Casting. A medium frequency induction furnace with a volume of 1 ton was used for melting. The base material was a metal solution, mainly containing elements such as Fe, Cr, C, and Mn. The temperature was increased to 1500℃-1550℃, and after the metal solution was completely melted, casting was carried out at a temperature of 1480℃-1520℃. The base foam model of the cutting ring was melted by heating. The metal solution was bonded to the wear-resistant composite material by high-temperature injection to form the entire casting. 4. Sand removal and cooling. When the casting is cooled to 840℃-900℃, the sand is removed, the mold is washed, and the cut ring material is obtained by natural cooling. During cooling, insulation treatment is performed. After that, the finished cut ring is obtained by machining as necessary.

[0080] The cutting ring manufactured by the manufacturing and preparation method provided by this embodiment is used. The wear-resistant coating in the first part 11 includes a wear-resistant composite formed by mixing wear-resistant particles WC with Fe, Cr, C, and Mn. The wear-resistant composite has a hardness of more than 65HRC. The wear-resistant coating in the second part 12 and the third part 13 includes a wear-resistant composite formed by mixing wear-resistant particles Al2O3 with Fe, Cr, C, and Mn. The wear-resistant composite has a hardness of more than 80HRC and is suitable for the overall processing conditions of limestone and gravel-bearing sandstone.

[0081] Through the description of the concrete pump vehicle cutting ring, its manufacturing method, and the concrete pump vehicle of the present disclosure, it can be seen that in each embodiment of the concrete pump vehicle cutting ring, its manufacturing method, and the concrete pump vehicle of the present disclosure, the cutting ring is molded by in-block casting and firmly bonded, and the cutting ring has better wear resistance and toughness, thereby solving the problem of alloy peeling and avoiding the problem of early failure of the pump vehicle cutting ring caused by alloy peeling, collapse, and the like. In this manufacturing method, processing steps such as billet punching, overlaying, alloy groove cutting, alloy plate matching, brazing, and alloy surface grinding are omitted. This manufacturing method has a simple processing step, high manufacturing efficiency, low overall cost, and high total cost performance, so as to bring more choices to users.

[0082] Finally, it should be noted that the above embodiments are only used to describe the technical solutions of the present disclosure, and are not used to limit the technical solutions of the present disclosure. Although the present disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that amendments may be made to the specific embodiments of the present disclosure, or equivalent exchanges may be made to partial technical features. All of these amendments and equivalent exchanges are within the scope of the technical solutions claimed by the present disclosure.

Claims

1. A cutting ring for a concrete pump vehicle, An annular base material (10) having a wear-prone portion; An abrasion-resistant layer disposed on the abrasion-prone portion; Equipped with The wear-resistant layer and the annular base material (10) are integrally formed by casting, The wear-prone portion comprises a first end surface of the annular base material (10) perpendicular to an axial direction of the annular base material (10), the first end surface being provided with a groove, the wear-resistant layer comprises a first wear-resistant layer (20), and the first wear-resistant layer (20) is disposed in the groove, The grooves are arranged along the circumferential direction of the annular base material (10), and the first wear-resistant layer (20) is annular; The wear-prone portion comprises a first annular surface of the annular base material (10) on the inner circumferential side of the annular base material (10) and a second annular surface on the outer circumferential side of the annular base material (10), the wear-resistant layer comprises a second wear-resistant layer (30) and a third wear-resistant layer (40), the second wear-resistant layer (30) being disposed on the inner side of the first annular surface and the third wear-resistant layer (40) being disposed on the outer side of the second annular surface, the second wear-resistant layer (30) and the third wear-resistant layer (40) are both annular; The first wear-resistant layer (20), the second wear-resistant layer (30), and the third wear-resistant layer (40) are made of the same material; The annular base material (10) comprises a first portion (11) having a first line segment, and a second portion (12) and a third portion (13) located on two sides of the first portion (11), the first line segment passing through the center of the circle of the annular base material (10), and both of the two end points of the first line segment are located on the periphery of the annular base material (10), the type of material of the wear-resistant layer located in the first portion (11) is different from the type of material of the wear-resistant layer located in the second portion (12), and the type of material of the wear-resistant layer located in the first portion (11) is different from the type of material of the wear-resistant layer located in the third portion (13), A cutting ring for a concrete pump vehicle, wherein the first line segment is horizontally disposed when the cutting ring is in an operating state.

2. 2. The cutting ring for a concrete pump truck according to claim 1, wherein the type of material of the wear-resistant layer located in the second portion (12) is the same as or different from the type of material of the wear-resistant layer located in the third portion (13).

3. 2. The cutting ring for a concrete pump truck according to claim 1, wherein a total arc length of the first portion (11) is greater than a sum of an arc length of the second portion (12) and an arc length of the third portion (13).

4. 2. The cutting ring for a concrete pump truck according to claim 1, wherein a total arc length of the first portion (11) is twice the sum of the arc length of the second portion (12) and the arc length of the third portion (13).

5. A concrete pump vehicle equipped with the cutting ring for a concrete pump vehicle according to any one of claims 1 to 4.

6. A method for manufacturing a cutting ring for a concrete pump vehicle according to any one of claims 1 to 4, Providing an annular base material model and a wear-resistant material; coating the wear-resistant material on the wear-prone portion of the annular base material model; Injecting a molten base material liquid into the annular base material model coated with the wear-resistant material, the annular base material model is melted by heating, and the cutting ring is integrally formed by casting the molten base material liquid and the wear-resistant material; Including, the annular base material model comprises a first part (11) having the first line segment, and the second part (12) and the third part (13) located on two sides of the first part (11), respectively, the first line segment passing through a center of a circle of the annular base material model, and both of the two end points of the first line segment being located on the periphery of the annular base material model; The step of coding the wear-resistant material onto the wear-prone portion of the annular base material model includes: coating the first portion (11) of the annular matrix model with a first wear-resistant material and coating the second portion (12) and the third portion (13) with a second wear-resistant material, the first wear-resistant material and the second wear-resistant material being of different types; The method of manufacturing, wherein the first wear-resistant layer (20), the second wear-resistant layer (30) and the third wear-resistant layer (40) are of the same material type.

7. The wear-resistant material is made of wear-resistant particles Al ２ O ３ , wear-resistant particles WC, or wear-resistant particles Al ２ O ３ and a mixture of wear-resistant particles WC.

8. The wear-resistant material is made of wear-resistant particles Al ２ O ３ and wear-resistant particles WC, wherein the wear-resistant particles Al ２ O ３ The method for manufacturing a cutting ring for a concrete pump truck according to claim 6, wherein the mass fraction ratio of the wear-resistant particles WC is 1:1 or 4:

6.

9. Before coating the wear-resistant material onto the wear-prone portion of the annular base metal model, The wear-resistant material is pre-dried in an oven, the drying temperature is set to 180°C to 300°C, the warming time is 1.5h to 3h, and then cooled to room temperature; adding an adhesive to the wear-resistant material; The method for manufacturing a cutting ring for a concrete pump vehicle according to claim 6, further comprising:

10. The step of coating the wear-resistant material on the wear-prone portion of the annular base material model includes: The manufacturing method of a cutting ring for a concrete pump truck according to claim 6, further comprising the step of coating the wear-resistant material on the wear-prone portion of the annular base material model, the coating thickness being 0.5 mm to 1.5 mm thicker than a preset thickness, the preset thickness being the thickness of the wear-resistant layer at the corresponding position of a finished cutting ring.

11. The method for manufacturing a cutting ring for a concrete pump truck according to claim 10, wherein the coating thickness of the wear-resistant material is 4mm to 8mm.

12. The step of injecting the molten base material liquid into the annular base material model coated with the wear-resistant material, the annular base material model is melted by heating, and the cutting ring is integrally formed by casting the molten base material liquid and the wear-resistant material, raising the temperature of the furnace to 1500°C-1550°C to melt the molten base material liquid containing the elements Fe, Cr, C and Mn, and casting the molten base material liquid at a melting temperature of 1480°C-1520°C after the molten base material liquid is completely melted, the annular base material model melts after encountering the molten base material liquid, and the molten base material liquid and the wear-resistant material are integrated by casting; obtaining cut ring blanks once the casting has cooled to 840°C-900°C, which are then further machined to obtain finished cut rings; The method for manufacturing a cutting ring for a concrete pump vehicle according to claim 6, comprising:

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