WO2023060626A1 - Anneau de coupe pour camion pompe à béton et son procédé de fabrication, et camion pompe à béton - Google Patents

Anneau de coupe pour camion pompe à béton et son procédé de fabrication, et camion pompe à béton Download PDF

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Publication number
WO2023060626A1
WO2023060626A1 PCT/CN2021/124401 CN2021124401W WO2023060626A1 WO 2023060626 A1 WO2023060626 A1 WO 2023060626A1 CN 2021124401 W CN2021124401 W CN 2021124401W WO 2023060626 A1 WO2023060626 A1 WO 2023060626A1
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WIPO (PCT)
Prior art keywords
wear
resistant
cutting ring
area
resistant layer
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PCT/CN2021/124401
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English (en)
Chinese (zh)
Inventor
陈波
崔海霞
王峰
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徐工集团工程机械股份有限公司
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Priority to JP2022545942A priority Critical patent/JP2024518203A/ja
Publication of WO2023060626A1 publication Critical patent/WO2023060626A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/02—Sand moulds or like moulds for shaped castings
    • B22C9/04—Use of lost patterns
    • B22C9/043—Removing the consumable pattern
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/22—Moulds for peculiarly-shaped castings
    • B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04B15/02—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous

Definitions

  • the present disclosure relates to the technical field of engineering machinery, in particular to a cutting ring for a concrete pump truck, a manufacturing method thereof, and a concrete pump truck.
  • the cutting ring is a key component for concrete pump trucks. During the pumping process, the spectacle plate and the cutting ring reciprocate and alternately move relative to each other to realize suction and feeding. Cutting rings not only need to have good wear resistance, but also need to have certain impact resistance. Cutting rings are more prone to wear and have a lower service life than eye plates.
  • the method of inlaying cemented carbide on the steel substrate to improve wear resistance is to combine the steel substrate with the cemented carbide through copper brazing, and the substrate and copper brazing
  • the wear resistance of the gap part is poor, and the cemented carbide will be exposed after wear, and cracks, collapse, and falling off will easily occur when impacted; it will also make the non-wear-resistant steel matrix directly contact with the concrete material, resulting in concrete Slurry leakage occurs during the conveying process, and in severe cases, the cutting ring will fail in advance, requiring shutdown for maintenance and replacement of parts, which seriously affects the construction progress.
  • Embodiments of the present disclosure provide a cutting ring for a concrete pump truck, a manufacturing method thereof, and a concrete pump truck, which can effectively improve the service life of the cutting ring.
  • a cutting ring for a concrete pump truck including:
  • An annular base including areas subject to wear;
  • the wear-resistant layer is arranged on the part prone to wear, and the wear-resistant layer and the base body are integrally cast.
  • the easy-to-wear part includes a first end face of the base body perpendicular to the axis direction of the base body, the first end face is provided with a groove, the wear-resistant layer includes a first wear-resistant layer, and the first wear-resistant layer is arranged in the groove middle.
  • the grooves are arranged along the circumference of the base body, so that the first wear-resistant layer has an annular shape.
  • the wear-prone part includes a first annular surface of the base body arranged in the circumferential direction and located on the inner side of the base body, and a second annular surface located on the outer side of the base body, and the wear-resistant layer includes the second wear-resistant layer and the third wear-resistant layer. Wearing layer, the second wear-resistant layer is arranged on the inside of the first ring surface, and the third wear-resistant layer is arranged on the outside of the second ring surface.
  • both the second wear-resistant layer and the third wear-resistant layer are annular in shape.
  • the base body includes a first area including a first line segment and a second area and a third area respectively located on both sides of the first area, the first line segment passes through the center of the base body and both end points are at
  • the material type of the wear-resistant layer located in the first area is the same as or different from the material type of the wear-resistant layer located in the second area
  • the material type of the wear-resistant layer located in the first area is the same as that located in the second area.
  • the materials of the wear-resistant layers in the three regions are the same or different.
  • the material type of the wear-resistant layer located in the second region is the same as or different from the material type of the wear-resistant layer located in the third region.
  • the total arc length of the first region is greater than the sum of the arc length of the second region and the arc length of the third region.
  • the total arc length of the first region is twice the sum of the arc length of the second region and the arc length of the third region.
  • a concrete pump truck including the above-mentioned cutting ring for a concrete pump truck.
  • a method for manufacturing a cutting ring for a concrete pump truck including:
  • the matrix raw material liquid formed by melting is poured into the matrix model coated with the wear-resistant material, the matrix model is melted by heat, and the cutting ring is integrally cast and formed by the matrix raw material liquid and the wear-resistant material.
  • the wear-resistant material includes wear-resistant particles Al 2 O 3 , wear-resistant particles WC, or a mixture of wear-resistant particles Al 2 O 3 and wear-resistant particles WC.
  • the wear-resistant material includes a mixture of wear-resistant particles Al 2 O 3 and wear-resistant particles WC, and the proportion of the mass fraction of wear-resistant particles Al 2 O 3 and wear-resistant particles WC in the mixture is 1: 1 or 4:6.
  • the base model includes a first area including a first line segment and a second area and a third area respectively located on both sides of the first area, the first line segment passes through the center of the base model and the two end points All on the outer circle of the base model, the operation of applying wear-resistant materials on the easy-wear parts of the base model includes:
  • the first wear-resistant material is applied to the first area of the matrix model, and the second wear-resistant material is applied to the second area and the third area, and the types of the first wear-resistant material and the second wear-resistant material are the same or different.
  • the manufacturing method before applying the wear-resistant material on the wear-prone parts of the base model, the manufacturing method further includes:
  • the drying temperature is set at 180°C to 300°C, the holding time is 1.5h to 3h, and then cooled to room temperature;
  • a liquid binder is added to the wear resistant material.
  • the operation of applying wear-resistant material on the wear-prone parts of the base model includes:
  • the thickness of the application is 0.5 mm to 1.5 mm larger than the preset thickness, and the preset thickness is the thickness of the wear-resistant layer at the corresponding position of the finished cutting ring.
  • the coating thickness of the wear-resistant material is 4mm-8mm.
  • pouring the melted matrix raw material liquid into the matrix model coated with the wear-resistant material, the matrix model is melted when heated, and the operation steps of integrally casting the matrix raw material liquid and the wear-resistant material include:
  • the blank of the cutting ring is obtained, and then the finished product of the cutting ring is obtained through further processing. .
  • the wear-resistant layer set on the easy-wear part of the base is cast integrally with the base, that is, the wear-resistant layer and the base are cast together.
  • the wear-resistant The grinding layer and the substrate are integrated, so the combination of the wear-resistant layer and the substrate is very firm, and the wear-resistant layer is not easy to fall off and collapse, which can greatly improve the service life of the cutting ring.
  • Fig. 1 is a front view of an embodiment of a cutting ring for a concrete pump truck of the present disclosure.
  • Fig. 2 is a sectional view along section A-A in Fig. 1 .
  • the cutting ring includes a base body 10 and a wear-resistant layer, the center of the base body 10 is provided with a through hole, and the base body 10 as a whole has a In an annular shape, the base body 10 includes parts that are easy to wear, and the wear-resistant layer is arranged on the parts that are easy to wear, and the wear-resistant layer and the base body 10 are integrally cast.
  • the wear-resistant layer and the base 10 are integrally casted on the wear-prone part of the base 10, that is, the wear-resistant layer and the base 10 are cast together.
  • the wear-resistant layer and the base 10 The matrix 10 is integrated, so the wear-resistant layer and the matrix 10 are firmly combined, and the wear-resistant layer is not easy to fall off or collapse, which can greatly improve the service life of the cutting ring.
  • the stability and reliability of the wear-resistant layer in the embodiment of the cutting ring provided by the present disclosure are higher, and the combination of the wear-resistant layer and the substrate is very firm , not easy to fall off or collapse, so the service life of the cutting ring has been significantly improved.
  • the easy-to-wear part includes a first end face of the base body 10 perpendicular to the axis direction of the base body 10, the first end face is provided with a groove, and the wear-resistant layer includes a first wear-resistant layer 20, the first wear-resistant layer 20 set in the groove.
  • the concrete pump truck includes a spectacle plate used in conjunction with the cutting ring.
  • the first end face is the end face of the cutting ring on the side close to the spectacle plate.
  • a first wear-resistant layer 20 is provided on the first end face, which can improve the wear resistance of the first end face.
  • Abrasion resistance when used in conjunction with the spectacle plate, the wear resistance of the first end surface is improved, which plays a very important role in improving the service life of the entire cutting ring.
  • the grooves are arranged along the circumference of the base body 10 so that the first wear-resistant layer 20 has a ring shape.
  • the grooves are arranged along the circumference of the base body 10 and have a ring shape, so that the first wear-resistant layer 20 has a ring shape, thereby protecting the axial end surface of the base body 10 in the entire circumferential direction.
  • the wear-prone parts include a first annular surface of the base body 10 arranged in the circumferential direction and located on the inner side of the base body 10 and a second annular surface located on the outer side of the base body 10 , and the wear-resistant layer includes a second wear-resistant layer 30 And the third wear-resistant layer 40, the second wear-resistant layer 30 is arranged on the inside of the first ring surface, and the third wear-resistant layer 40 is arranged on the outside of the second ring surface.
  • the second wear-resistant layer 30 By arranging the second wear-resistant layer 30 on the inner side of the first annulus and the third abradable layer 40 on the outer side of the second annulus, the radial inner and outer sides of the cutting ring can be protected.
  • both the second wear-resistant layer 30 and the third wear-resistant layer 40 are annular in shape. This protects the radially inner and outer sides of the basic body 10 in the entire circumferential direction.
  • the substrate 10 includes a first region 11 including a first line segment and a second region 12 and a third region 13 respectively located on both sides of the first region 11, and the first line segment passes through the center of the substrate 10 And both end points are on the outer circle of the base body 10, the material type of the wear-resistant layer located in the first area 11 is the same as or different from the material type of the wear-resistant layer located in the second area 12, located in the first area 11 The material type of the wear-resistant layer is the same as or different from the material type of the wear-resistant layer located in the third region 13 .
  • the substrate 10 is divided into three areas, the first area 11, the second area 12 and the third area 13, and the type of wear-resistant layer material located in the first area 11 is set to be the same as that of the second area 12 and the third area 13
  • the materials of the wear-resistant layer inside are the same or different, so that the first region 11, the second region 12 and the third region 13 have the same or different wear resistance.
  • the first area 11 includes two left and right arcs
  • the second area 12 includes an arc above the first area 11
  • the third area 13 includes an arc below the first area 11 .
  • the first line segment is the diameter of the outer circle of the base body 10 .
  • the outer circle is the circle with the largest diameter of the base body 10 .
  • the first line segment is the horizontal diameter.
  • the first line segment is arranged horizontally, and the wear resistance of the wear-resistant layer located in the first area 11 is better than that of the wear-resistant layer located in the second area 12 and the third area 13 .
  • the first line segment When the cutting ring is in working condition, the first line segment can be set horizontally so that the first area 11 is in the middle, the second area 12 is located above the first area 11, and the third area 13 is located below the first area 11, so that It can make the first area 11, which is relatively easy to wear when cooperating with the spectacle plate, have stronger wear resistance and improve the service life of the cutting ring; while the second area 12 and the second area, which are less prone to wear than the first area 11
  • the three regions 13 can adopt wear-resistant materials with slightly weaker wear resistance to save costs.
  • the material type of the wear-resistant layer located in the second region 12 is the same as or different from the material type of the wear-resistant layer located in the third region 13 .
  • the material of the wear-resistant layer in the second area 12 and the third area 13 can be freely selected according to the actual wear conditions.
  • the total arc length of the first region 11 is greater than the sum of the arc length of the second region 12 and the arc length of the third region 13 .
  • the total arc length of the first region 11 is twice the sum of the arc length of the second region 12 and the arc length of the third region 13 . This setting can cover the easy-wear positions of most cutting rings, and has strong applicability.
  • the present disclosure provides a concrete pump truck, including the above-mentioned cutting ring for the concrete pump truck.
  • the present disclosure provides a method for manufacturing a cutting ring for a concrete pump truck, including:
  • the matrix raw material liquid formed by melting is poured into the matrix model coated with the wear-resistant material, the matrix model is melted by heat, and the cutting ring is integrally cast and formed by the matrix raw material liquid and the wear-resistant material.
  • the matrix model can be made of materials that melt when heated, so that the matrix model can be melted when the matrix raw material liquid is poured, and the matrix raw material liquid can be shaped according to the shape of the matrix model.
  • the matrix model can use materials such as foam.
  • the matrix raw material liquid can be a liquid in which all elements are metal elements, such as a liquid containing elements Fe, Cr, C and Mn; the matrix raw material liquid can also be a liquid containing carbon elements and metal elements, and the matrix is made of carbon steel, such as Q345 .
  • the wear resistant material includes one or more wear resistant particles.
  • wear-resistant materials with preset wear-resistant ability can be formulated according to needs, so as to avoid waste or insufficient wear-resistant ability.
  • the wear-resistant material includes wear-resistant particles Al 2 O 3 , wear-resistant particles WC, or a mixture of wear-resistant particles Al 2 O 3 and wear-resistant particles WC.
  • the wear-resistant material includes a mixture of wear-resistant particles Al 2 O 3 and wear-resistant particles WC, and the ratio of the mass fraction of wear-resistant particles Al 2 O 3 and wear-resistant particles WC in the mixture is 1:1 or 4:6.
  • the base model includes a first area 11 including a first line segment and a second area 12 and a third area 13 respectively located on both sides of the first area 11, and the first line segment passes through the center of the base model And both end points are on the outer circle of the base model, the operation of applying wear-resistant material on the easy-wear parts of the base model includes:
  • the first wear-resistant material is applied to the first area 11 of the base model, and the second wear-resistant material is applied to the second area 12 and the third area 13, and the types of the first wear-resistant material and the second wear-resistant material are the same or different.
  • different areas can have different wear-resistant properties, and it is not necessary to apply the strongest wear-resistant materials to all areas, so as to avoid waste and increase manufacturing costs.
  • the manufacturing method before applying the wear-resistant material on the wear-prone parts of the base model, the manufacturing method further includes:
  • the drying temperature is set at 180°C to 300°C, the holding time is 1.5h to 3h, and then cooled to room temperature;
  • a liquid binder is added to the wear resistant material.
  • the operation of applying wear-resistant material on the wear-prone parts of the base model includes:
  • the thickness of the application is 0.5 mm to 1.5 mm larger than the preset thickness, and the preset thickness is the thickness of the wear-resistant layer at the corresponding position of the finished cutting ring.
  • the coating thickness By setting the coating thickness to be 0.5 mm to 1 mm higher than the preset thickness, such as 0.5 mm, 1 mm and 1.5 mm, some processing allowance can be reserved, and at the same time, it is beneficial to improve the wear resistance.
  • the coating thickness of the wear-resistant material is 4mm-8mm.
  • pouring the melted matrix raw material liquid into the matrix model coated with the wear-resistant material, the matrix model is melted when heated, and the operation steps of integrally casting the matrix raw material liquid and the wear-resistant material include:
  • the blank of the cutting ring is obtained, and then the finished product of the cutting ring is obtained through further processing. .
  • a method for manufacturing a cutting ring for a concrete pump truck includes:
  • raw materials include one or two kinds of wear-resistant particles Al 2 O 3 and WC, with a particle size of 0.5mm to 2mm, and put the wear-resistant particles in the oven in advance at a temperature of 180°C to 300°C. Dry in ambient environment, keep warm for 1h ⁇ 3h, then cool to room temperature;
  • Preparation of wear-resistant composite material add a liquid binder to the above-mentioned wear-resistant particles, stir evenly, and apply it to the groove of the cutting ring matrix foam model and the radial inner and outer sides, the coating thickness is 4mm-8mm, the height About 1mm out of the substrate plane, used for machining allowance and wear-resistant reinforcement; hang-coat the surface of the cutting ring model of the coated wear-resistant composite material with casting paint, and place it neatly in the sand box after drying, and reserve the sprue and Riser.
  • Casting molding use an intermediate frequency furnace with a capacity of 1 ton for smelting.
  • the matrix raw material liquid is a metal liquid mainly containing elements such as Fe, Cr, C, Mn, etc., and the temperature is raised to 1500 °C ⁇ 1550 °C. Pouring at 1480°C ⁇ 1520°C;
  • Shakeout cooling when the casting is cooled to 840°C ⁇ 900°C, shakeout, clean the mold, and naturally cool to obtain the cutting ring blank. When cooling, carry out heat preservation treatment; then, according to the requirements, the finished product of the cutting ring is obtained through machining .
  • the cutting ring produced by the production and preparation method provided in this example will have a little molten metal infiltrated into the wear-resistant material during the casting process, so the wear-resistant coating includes wear-resistant particles and Fe, Cr, C, Mn, etc.
  • the mixed wear-resistant composite material has a hardness greater than 60HRC, a wear rate less than 0.03%, and a bending strength greater than 1700MPa.
  • the wear-resistant layer and the substrate are combined by high-temperature pouring, which is a cast whole and is not easy to fall off.
  • the steps of the cutting ring manufacturing method include:
  • raw materials include wear-resistant particles Al 2 O 3 , with a particle size of 0.5mm to 2mm. Put the wear-resistant particles into an oven for drying in advance. The drying temperature is set at 180°C to 300°C, and the holding time is for 1.5h to 3h, and then cooled to room temperature;
  • wear-resistant composite material Add liquid binder to the above-mentioned wear-resistant particles Al 2 O 3 , stir evenly, and apply it to the groove of the cutting ring matrix foam model.
  • the thickness of the coating is 4mm-8mm, and the height About 1mm out of the substrate plane, used for machining allowance and wear-resistant reinforcement; Hang-coat the surface of the cutting ring foam model coated with wear-resistant composite material with casting paint, and place it neatly in the sand box after drying, and reserve the sprue and Riser;
  • Casting molding use an intermediate frequency furnace with a capacity of 1 ton for smelting, the matrix raw material liquid is metal liquid mainly containing elements such as Fe, Cr, C, Mn, etc., heat up to 1500 ° C ⁇ 1550 ° C, wait for the metal liquid to completely melt, then The pouring temperature is 1480 °C ⁇ 1520 °C, the foam model of the cutting ring matrix is melted at high temperature, and the molten metal and the wear-resistant composite material are combined by high temperature pouring to form a whole casting;
  • Shaking sand cooling When the casting is cooled to 840°C ⁇ 900°C, shake out the sand, clean the mold, and naturally cool to obtain the cutting ring blank. ring.
  • the cutting ring produced by the production and preparation method provided in this example will have a little metal liquid infiltrated into the wear-resistant material during the casting process, so the wear-resistant coating includes wear-resistant particles Al 2 O 3 and Fe, Cr,
  • the wear-resistant composite material mixed with C, Mn, etc., its hardness can reach 80HRC, suitable for granite sandstone.
  • the steps of the cutting ring manufacturing method include:
  • raw materials include wear-resistant particles WC, with a particle size of 0.5mm to 2mm. Put the wear-resistant particles into an oven to dry in advance. The drying temperature is set at 180°C to 300°C, and the holding time is 1.5h ⁇ 3h, then cooled to room temperature;
  • wear-resistant composite material Add liquid binder to the above-mentioned wear-resistant particles WC, stir evenly, and apply it to the groove of the foam model of the cutting ring matrix.
  • the thickness of the coating is 4mm-8mm, and it is higher than the plane of the matrix.
  • About 1mm used for processing allowance and wear-resisting reinforcement;
  • Casting molding use an intermediate frequency furnace with a capacity of 1 ton for smelting, the matrix raw material liquid is metal liquid mainly containing elements such as Fe, Cr, C, Mn, etc., heat up to 1500 ° C ⁇ 1550 ° C, wait for the metal liquid to completely melt, then The pouring temperature is 1480 °C ⁇ 1520 °C, the foam model of the cutting ring matrix is melted at high temperature, and the molten metal and the wear-resistant composite material are combined by high temperature pouring to form a whole casting;
  • Shaking sand cooling When the casting is cooled to 840°C ⁇ 900°C, shake out the sand, clean the mold, and naturally cool to obtain the cutting ring blank. ring.
  • the wear-resistant coating includes wear-resistant composite materials mixed with wear-resistant particles WC and Fe, Cr, C, Mn, etc., and its hardness can reach 65HRC, which is suitable for conventional Limestone mix.
  • the steps of the cutting ring manufacturing method include:
  • raw materials include wear-resistant particles Al 2 O 3 and wear-resistant particles WC, the two kinds of particles each account for 50% of the mass fraction, and the particle size is 0.5mm-2mm.
  • the drying temperature is set at 180°C to 300°C, the holding time is 1.5h to 3h, and then cooled to room temperature;
  • wear-resistant composite material Mix the above-mentioned wear-resistant particles Al 2 O 3 and wear-resistant particles WC, and add a liquid binder to the mixture, stir evenly, and apply it to the groove of the foam model of the cutting ring matrix,
  • the thickness of the coating is 4mm-8mm, and it is about 1mm higher than the substrate plane, which is used for machining allowance and wear-resistant reinforcement;
  • the surface of the cutting ring foam model coated with wear-resistant composite material is hang-coated with casting paint, and placed neatly after drying In the sand box, reserve the sprue and riser;
  • Casting molding use an intermediate frequency furnace with a capacity of 1 ton for smelting, the matrix raw material liquid is metal liquid mainly containing elements such as Fe, Cr, C, Mn, etc., heat up to 1500 ° C ⁇ 1550 ° C, wait for the metal liquid to completely melt, then The pouring temperature is 1480 °C ⁇ 1520 °C, the foam model of the cutting ring matrix is melted at high temperature, and the molten metal and the wear-resistant composite material are combined by high temperature pouring to form a whole casting;
  • Shaking sand cooling When the casting is cooled to 840°C-900°C, shake out the sand, clean the mold, and naturally cool to obtain the cutting ring blank. ring.
  • the wear-resistant coating includes a wear-resistant composite material mixed with wear-resistant particles Al 2 O 3 , WC, Fe, Cr, C, Mn, etc., and its hardness can reach 70HRC, suitable for limestone and pebble sand mixture.
  • the steps of a cutting ring manufacturing method include:
  • raw materials include wear-resistant particles Al 2 O 3 and wear-resistant particles WC, and the mass fraction ratio of wear-resistant particles Al 2 O 3 to wear-resistant particles WC is 4:6, and the particle size is 0.5mm ⁇ 2mm, put the wear-resistant particles in the oven to dry in advance, the drying temperature is set at 180°C to 300°C, the holding time is 1.5h to 3h, and then cooled to room temperature;
  • wear-resistant composite material Mix the above-mentioned wear-resistant particles Al 2 O 3 and wear-resistant particles WC, and add a liquid binder to the mixture, stir evenly, and apply it to the groove of the foam model of the cutting ring matrix,
  • the thickness of the coating is 4mm-8mm, and it is about 1mm higher than the substrate plane, which is used for machining allowance and wear-resistant reinforcement;
  • the surface of the cutting ring foam model coated with wear-resistant composite material is hang-coated with casting paint, and placed neatly after drying In the sand box, reserve the sprue and riser;
  • Casting molding use an intermediate frequency furnace with a capacity of 1 ton for smelting, the matrix raw material liquid is metal liquid mainly containing elements such as Fe, Cr, C, Mn, etc., heat up to 1500 ° C ⁇ 1550 ° C, wait for the metal liquid to completely melt, then The pouring temperature is 1480 °C ⁇ 1520 °C, the foam model of the cutting ring matrix is melted at high temperature, and the molten metal and the wear-resistant composite material are combined by high temperature pouring to form a whole casting;
  • Shaking sand cooling When the casting is cooled to 840°C ⁇ 900°C, shake out the sand, clean the mold, and naturally cool to obtain the cutting ring blank. ring.
  • the wear-resistant coating includes a wear-resistant composite material mixed with wear-resistant particles Al 2 O 3 , WC, Fe, Cr, C, Mn, etc., and its hardness can reach 67HRC, suitable for limestone and pebble sand mixture.
  • the steps of a cutting ring manufacturing method include:
  • raw materials include wear-resistant particles Al 2 O 3 and wear-resistant particles WC, with a particle size of 0.5mm to 2mm. Put the wear-resistant particles in an oven in advance for drying, and the drying temperature is set at 180°C ⁇ 300°C, the holding time is 1.5h ⁇ 3h, and then cooled to room temperature;
  • wear-resistant composite material Add liquid binder to the above-mentioned wear-resistant particles Al 2 O 3 and wear-resistant particles WC respectively, stir evenly, and apply wear-resistant particles WC to the first part of the cutting ring matrix foam model.
  • wear-resistant particles Al 2 O 3 are applied to the grooves of the second area 12 and the third area 13 of the cutting ring matrix foam model, and the thickness of the coating is 4mm-8mm, and the thickness is higher than
  • the base plane is about 1mm, which is used for machining allowance and wear-resisting reinforcement; hang-coat the surface of the cutting ring foam model coated with wear-resistant composite material with casting paint, and place it neatly in the sand box after drying. mouth;
  • Casting molding use an intermediate frequency furnace with a capacity of 1 ton for smelting, the matrix raw material liquid is metal liquid mainly containing elements such as Fe, Cr, C, Mn, etc., heat up to 1500 ° C ⁇ 1550 ° C, wait for the metal liquid to completely melt, then The pouring temperature is 1480 °C ⁇ 1520 °C, the foam model of the cutting ring matrix is melted at high temperature, and the molten metal and the wear-resistant composite material are combined by high temperature pouring to form a whole casting;
  • Shaking sand cooling When the casting is cooled to 840°C ⁇ 900°C, shake out the sand, clean the mold, and naturally cool to obtain the cutting ring blank. ring.
  • the wear-resistant coating in the first area 11 includes wear-resistant composite materials mixed with wear-resistant particles WC and Fe, Cr, C, Mn, etc., and its hardness is It can reach 65HRC;
  • the wear-resistant coating in the second zone 12 and the third zone 13 includes wear-resistant composite materials mixed with wear-resistant particles Al 2 O 3 and Fe, Cr, C, Mn, etc., and its hardness can reach 80HRC, It is suitable for comprehensive working conditions such as limestone and pebble sand.
  • the cutting ring for concrete pump truck and its manufacturing method and multiple embodiments of the concrete pump truck in the present disclosure the cutting ring adopts Integral casting and solid combination, the cutting ring has better wear resistance and toughness, which solves the problem of alloy shedding and avoids the early failure of the pump truck cutting ring caused by the alloy block falling off and collapsing; in the manufacturing method It saves the billet blanking, surfacing welding, alloy groove opening, alloy matching plate, brazing, alloy surface grinding and other processing procedures.
  • the processing technology is simple, the production efficiency is high, the overall cost is low, and the overall cost performance is high, bringing users There is more room for choice.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
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  • Reciprocating Pumps (AREA)

Abstract

L'invention porte sur un anneau de coupe pour un camion pompe à béton et sur son procédé de fabrication, et sur un camion pompe à béton. L'anneau de coupe pour un camion pompe à béton comprend un corps de base en forme d'anneau (10) et une couche résistante à l'usure, le corps de base en forme d'anneau (10) comprenant une partie facilement usée ; la couche résistante à l'usure est disposée sur la partie facilement usée ; et la couche résistante à l'usure et le corps de base (10) sont formés d'un seul tenant par coulée. Dans le procédé de la couche résistante à l'usure, qui est disposée sur la partie facilement usée du corps de base (10), et le corps de base (10) étant formé d'un seul tenant au moyen d'une coulée, la couche résistante à l'usure et le corps de base (10) sont intégrés, de telle sorte que la couche résistante à l'usure et le corps de base (10) sont fermement combinés, et la couche résistante à l'usure n'est pas sujette à l'écaillage ou à la fissuration, de telle sorte que la durée de vie de l'anneau de coupe peut être considérablement prolongée.
PCT/CN2021/124401 2021-10-15 2021-10-18 Anneau de coupe pour camion pompe à béton et son procédé de fabrication, et camion pompe à béton WO2023060626A1 (fr)

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CN116197625B (zh) * 2023-04-28 2023-07-21 安徽巨盛石油钻采配件有限公司 一种抗高压耐磨缸套制备工艺

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JPH01267372A (ja) * 1988-04-15 1989-10-25 Kawasaki Heavy Ind Ltd 揺動弁式コンクリートポンプの揺動弁および吸入吐出口板
CN1190703A (zh) * 1997-12-30 1998-08-19 李仁� 双金属混凝土泵耐磨板及制造方法
CN201884265U (zh) * 2010-12-17 2011-06-29 三一重工股份有限公司 一种切割环及混凝土泵送设备
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