WO2023060626A1

WO2023060626A1 - Cutting ring for concrete pump truck and manufacturing method therefor, and concrete pump truck

Info

Publication number: WO2023060626A1
Application number: PCT/CN2021/124401
Authority: WO
Inventors: 陈波; 崔海霞; 王峰
Original assignee: 徐工集团工程机械股份有限公司
Priority date: 2021-10-15
Filing date: 2021-10-18
Publication date: 2023-04-20
Also published as: CN113944623B; CN113944623A

Abstract

A cutting ring for a concrete pump truck and a manufacturing method therefor, and a concrete pump truck. The cutting ring for a concrete pump truck comprises a ring-shaped base body (10) and a wear-resistant layer, wherein the ring-shaped base body (10) comprises an easily worn part; the wear-resistant layer is arranged on the easily worn part; and the wear-resistant layer and the base body (10) are integrally formed by means of casting. In the process of the wear-resistant layer, which is arranged on the easily worn part of the base body (10), and the base body (10) being integrally formed by means of casting, the wear-resistant layer and the base body (10) are integrated, such that the wear-resistant layer and the base body (10) are firmly combined, and the wear-resistant layer is not prone to flaking off or cracking, so that the service life of the cutting ring can be greatly prolonged.

Description

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

This application is based on the application with the Chinese application number 202111203865.4 and the application date is October 15, 2021, and claims its priority. The disclosure content of the Chinese application is hereby incorporated into this application as a whole.

technical field

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.

Background technique

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.

In order to improve the service life of the cutting ring, at present, most cutting rings in the industry adopt the method of inlaying cemented carbide on the steel substrate, such as single alloy + inner hole surfacing, double alloy + inner hole surfacing or all alloy, etc. Some Diamond material has also been used.

The method of inlaying cemented carbide on the steel substrate to improve wear resistance, whether it is a single alloy, double alloy or all alloy, 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.

In addition, from the perspective of production and processing, there are many production processes for the cutting ring of the alloy mosaic structure, which need to go through: steel substrate blanking→surfacing→alloy groove opening→alloy matching plate→brazing→alloy surface grinding→drilling→ Inspection, etc., the manufacturing cycle is longer. Moreover, the cost of cemented carbide is high, accounting for about 80% of the price of the entire cutting ring, which is not conducive to industrialization.

It should be noted that the information disclosed in the background technology section of the present disclosure is only intended to increase the understanding of the general background of the present disclosure, and should not be considered as an acknowledgment or in any form to imply that the information constitutes knowledge already known to those skilled in the art. current technology.

Contents of the invention

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.

According to a first aspect of the present disclosure, a cutting ring for a concrete pump truck is provided, including:

An annular base, including areas subject to wear; and

The wear-resistant layer is arranged on the part prone to wear, and the wear-resistant layer and the base body are integrally cast.

In some embodiments, 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.

In some embodiments, the grooves are arranged along the circumference of the base body, so that the first wear-resistant layer has an annular shape.

In some embodiments, 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.

In some embodiments, both the second wear-resistant layer and the third wear-resistant layer are annular in shape.

In some embodiments, 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 On the outer circle of the substrate, 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, and 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.

In some embodiments, 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.

In some embodiments, 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.

In some embodiments, 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.

According to a second aspect of the present disclosure, a concrete pump truck is provided, including the above-mentioned cutting ring for a concrete pump truck.

According to a third aspect of the present disclosure, a method for manufacturing a cutting ring for a concrete pump truck is provided, including:

Provide annular base model and wear-resistant materials;

Apply wear-resistant material to the wear-prone parts of the base model; and

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.

In some embodiments, 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.

In some embodiments, 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.

In some embodiments, 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.

In some embodiments, before applying the wear-resistant material on the wear-prone parts of the base model, the manufacturing method further includes:

Put the wear-resistant material into 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; and

A liquid binder is added to the wear resistant material.

In some embodiments, the operation of applying wear-resistant material on the wear-prone parts of the base model includes:

Apply wear-resistant material on the wear-prone parts of the base model, and 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.

In some embodiments, the coating thickness of the wear-resistant material is 4mm-8mm.

In some embodiments, 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:

Raise the temperature of the furnace to 1500°C to 1550°C to smelt the matrix raw material liquid containing elements Fe, Cr, C and Mn. After the matrix raw material liquid is completely melted, pour it at a pouring temperature of 1480°C to 1520°C. The matrix The model is melted after encountering the matrix raw material liquid, and the matrix raw material liquid and the wear-resistant material are combined into one through casting;

When the casting is cooled to 840°C to 900°C, the blank of the cutting ring is obtained, and then the finished product of the cutting ring is obtained through further processing. .

Based on the above technical solution, in the embodiment of the present disclosure, 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. During the molding process, 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.

Other features of the present disclosure and advantages thereof will become apparent through the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only It is an embodiment of the present disclosure, and those skilled in the art can also obtain other drawings according to the provided drawings without creative efforts.

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 .

Detailed ways

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Apparently, the described embodiments are only some of the embodiments of the present disclosure, not all of them. Based on the embodiments of the present disclosure, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present disclosure.

In describing the present disclosure, it is to be understood that the terms "center", "transverse", "longitudinal", "front", "rear", "left", "right", "upper", "lower", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present disclosure and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the scope of the present disclosure.

As shown in Figures 1 and 2, in some embodiments of the cutting ring for concrete pump truck provided by the present disclosure, 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.

In the above-mentioned embodiments, 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. During the molding process, 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.

Compared with the technical solution of embedding the wear-resistant layer on the substrate in the related art, 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.

In some embodiments, 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.

In some embodiments, 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.

In some embodiments, 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.

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.

In some embodiments, 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.

In some embodiments, 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.

When different wear-resistant materials are used in different areas, it is beneficial to improve the wear-resistant performance of the working surface, and at the same time reduce the requirements for the wear-resistant performance of the non-working surface and save costs.

As shown in FIG. 1 , the first area 11 includes two left and right arcs, the second area 12 includes an arc above the first area 11 , and 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 . In Figure 1, the first line segment is the horizontal diameter.

In some embodiments, 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 .

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.

In some embodiments, 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.

In some embodiments, 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 . By increasing the total arc length of the first region 11 and increasing the range covered by the first region 11, the area of the region with strong wear resistance can be increased, thereby effectively improving the overall wear resistance of the cutting ring.

In some embodiments, 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:

Provide annular base model and wear-resistant materials;

Apply wear-resistant material to the wear-prone parts of the base model; and

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. For example, 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 .

In some embodiments, the wear resistant material includes one or more wear resistant particles. By using one or more kinds of 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.

In some embodiments, 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.

In some embodiments, 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.

By applying different wear-resistant materials to different areas, 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.

A liquid binder is added to the wear resistant material.

By drying the wear-resistant material in advance, it can prevent the high moisture in the wear-resistant material from affecting the stability during application. Cooling the dried wear-resistant material to room temperature can avoid affecting the bonding ability of the binder when the binder is subsequently added.

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 operation steps of some embodiments of the manufacturing method of the cutting ring for the concrete pump truck of the present disclosure are described below:

In some embodiments, a method for manufacturing a cutting ring for a concrete pump truck includes:

Pretreatment of wear-resistant composite materials: 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 ℃ ~ 1550 ℃. Pouring at 1480℃～1520℃;

Shakeout cooling: when the casting is cooled to 840℃～900℃, 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.

Several specific embodiments of the manufacturing method of the cutting ring for the disclosed concrete pump truck are introduced below:

In a first embodiment, the steps of the cutting ring manufacturing method include:

1. Pre-treatment of wear-resistant composite materials: 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;

2. Preparation of 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;

3. 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 ℃ ~ 1520 ℃, 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;

4. Shaking sand cooling: When the casting is cooled to 840℃～900℃, 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.

In a second embodiment, the steps of the cutting ring manufacturing method include:

1. Pre-treatment of wear-resistant composite materials: 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;

2. Preparation of 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; 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, reserving the sprue and riser;

For the cutting ring produced by the production and preparation method provided in this example, 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.

In a third embodiment, the steps of the cutting ring manufacturing method include:

1. Pre-treatment of wear-resistant composite materials: 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. Put the wear-resistant particles into the oven in advance Drying, 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;

2. Preparation of 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;

4. 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.

For the cutting ring produced by the production and preparation method provided in this example, 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.

In a fourth embodiment, the steps of a cutting ring manufacturing method include:

1. Pre-treatment of wear-resistant composite materials: 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;

For the cutting ring produced by the production and preparation method provided in this example, 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.

In a fifth embodiment, the steps of a cutting ring manufacturing method include:

1. Pre-treatment of wear-resistant composite materials: 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;

2. Preparation of 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. In the groove of area 11, 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;

For the cutting ring produced by the production and preparation method provided in this embodiment, 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.

Through the description of the cutting ring for concrete pump truck and its manufacturing method and multiple embodiments of the concrete pump truck in the present disclosure, it can be seen that in the embodiments of the cutting ring for concrete pump truck and its manufacturing method and 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.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present disclosure and not to limit them; although the present disclosure has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: without departing from Under the premise of the principles of the present disclosure, it is still possible to modify the specific implementation methods of the present disclosure or perform equivalent replacements for some technical features, and these modifications and equivalent replacements should all be included in the scope of the technical solution claimed in the present disclosure.

Claims

A cutting ring for a concrete pump truck, characterized in that it comprises:

an annular base (10), including a wear-prone area; and

The wear-resistant layer is arranged on the part prone to wear, and the wear-resistant layer and the base (10) are integrally casted.
The cutting ring for concrete pump truck according to claim 1, characterized in that, 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), and the first end face of the base body (10) is A groove is provided on one end surface, and the wear-resistant layer includes a first wear-resistant layer (20), and the first wear-resistant layer (20) is arranged in the groove.
The cutting ring for concrete pump truck according to claim 2, characterized in that, the grooves are arranged along the circumferential direction of the base body (10), so that the first wear-resistant layer (20) has an annular shape.
The cutting ring for concrete pump truck according to claim 1, characterized in that, the easy-to-wear part comprises a first annular surface of the base body (10) arranged along the circumferential direction and located inside the base body (10) and the second ring surface located on the outer side of the base (10), the wear-resistant layer includes a second wear-resistant layer (30) and a third wear-resistant layer (40), and the second wear-resistant layer (30) It 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 cutting ring for concrete pump truck according to claim 4, characterized in that, both the second wear-resistant layer (30) and the third wear-resistant layer (40) are annular.
The cutting ring for concrete pump truck according to claim 1, characterized in that, the base (10) includes a first area (11) including a first line segment and The second area (12) and the third area (13) on both sides, the first line segment passes through the center of the base (10) and both end points are on the outer circle of the base (10), located The material type of the wear-resistant layer in the first area (11) is the same as or different from the material type of the wear-resistant layer in the second area (12), and the material type of the wear-resistant layer in the first area (11) is The material type of the wear-resistant layer in ) is the same as or different from the material type of the wear-resistant layer in the third region (13).
The cutting ring for concrete pump truck according to claim 6, characterized in that, the material type of the wear-resistant layer located in the second area (12) is the same as the material type of the wear-resistant layer located in the third area (13) The materials of the wear-resistant layer are the same or different.
The cutting ring for concrete pump truck according to claim 6, characterized in that, the total arc length of the first area (11) is greater than the arc length of the second area (12) and the arc length of the third area (13 ) is the sum of arc lengths.
The cutting ring for concrete pump truck according to claim 6, characterized in that, the total arc length of the first area (11) is the arc length of the second area (12) and the arc length of the third area (13 ) twice the sum of the arc lengths.
A concrete pump truck, characterized by comprising the cutting ring for a concrete pump truck according to any one of claims 1-9.
A method for manufacturing a cutting ring for a concrete pump truck, characterized in that it comprises:

Provide annular base model and wear-resistant materials;

Applying the wear-resistant material to the wear-prone parts of the base model; and

The matrix raw material solution formed by melting is poured into the matrix model coated with the wear-resistant material, the matrix model is melted when heated, and the cutting ring is integrally cast and formed by the matrix raw material liquid and the wear-resistant material.
The method for manufacturing a cutting ring for a concrete pump truck according to claim 11, wherein the wear-resistant material comprises wear-resistant particles Al 2 O 3 , wear-resistant particles WC, or wear-resistant particles Al 2 O 3 and wear-resistant Mixture of granular WC.
The method for manufacturing a cutting ring for a concrete pump truck according to claim 11, wherein the wear-resistant material comprises a mixture of wear-resistant particles Al2O3 and wear-resistant particles WC, and the wear-resistant particles Al in the mixture The mass fraction ratio of 2 O 3 and wear-resistant particles WC is 1:1 or 4:6.
The method for manufacturing a cutting ring for a concrete pump truck according to claim 11, wherein the base model includes a first area (11) including a first line segment and a first area (11) respectively located in the first area (11). ) on both sides of the second area (12) and the third area (13), the first line segment passes through the center of the base model and both endpoints are on the outer circle of the base model, in the base The operation of applying the wear-resistant material to the wear-prone parts of the 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). The first The wear-resistant material is the same or different from the second wear-resistant material.
The manufacturing method of the cutting ring for concrete pump truck according to claim 11, characterized in that, before applying the wear-resistant material on the easy-wear parts of the base model, the manufacturing method further comprises:

The wear-resistant material is put into an 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; and

A liquid binder is added to the wear resistant material.
The method for manufacturing a cutting ring for a concrete pump truck according to claim 11, wherein the operation of applying the wear-resistant material on the easy-wear parts of the base model includes:

The wear-resistant material is applied to the wear-prone parts of the base model, and the thickness of the application is 0.5 mm to 1.5 mm greater than the preset thickness, which is the thickness of the wear-resistant layer at the corresponding position of the finished cutting ring.
The method for manufacturing a cutting ring for a concrete pump truck according to claim 16, wherein the coating thickness of the wear-resistant material is 4mm-8mm.
The method for manufacturing a cutting ring for a concrete pump truck according to claim 11, wherein the base material liquid formed by melting is poured into the base model coated with the wear-resistant material, and the base model is melted when heated. , the operation steps of integral casting of the matrix raw material liquid and the wear-resistant material include:

Raise the temperature of the furnace to 1500°C to 1550°C to smelt the matrix raw material liquid containing elements Fe, Cr, C and Mn. After the matrix raw material liquid is completely melted, pour it at a pouring temperature of 1480°C to 1520°C , the matrix model is melted after encountering the matrix raw material liquid, and the matrix raw material liquid and the wear-resistant material are combined into one by casting;

When the casting is cooled to 840°C to 900°C, the blank of the cutting ring is obtained, and then the finished product of the cutting ring is obtained through further processing.