Road roller frame, manufacturing method thereof and road roller

Abstract

The invention provides a road roller frame, a manufacturing method thereof and a road roller. The road roller frame comprises a front frame (100) and a rear frame (200), the rear frame (200) is connected with the front frame (100) in a hinged mode; and at least one of the front frame (100) and the rear frame (200) is integrally formed by casting.

Description

Technical Field

[0001] The present application relates to the technical field of engineering machinery, and in particular to a road roller frame, a manufacturing method thereof, and a road roller. Background Art

[0002] The roller frame is usually processed by traditional methods such as stamping and welding, which has problems such as large processing volume, numerous processes, and difficult to control welding quality. As a result, the frame is not lightweight enough, the heat-affected zone of the weld is prone to fatigue failure, and it cannot adapt to the harsh working conditions of construction machinery.

[0003] At present, production efficiency and frame quality are usually improved in welding, for example, by designing new welding tools and adopting automation methods. Compared with conventional welding processes, these methods have not fundamentally changed the number of components and welding procedures. There are still problems such as large processing volume, numerous procedures, and difficult to control welding quality, which leads to insufficient lightweighting of the frame, fatigue failure in the heat-affected zone of the weld, and wear and failure at the bottom of the water tank support and the bottom of the power compartment, which cannot adapt to the harsh working conditions of construction machinery. Summary of the invention

[0004] The present application provides a road roller frame, comprising:

[0005] Front frame;

[0006] a rear frame, hingedly connected to the front frame; and

[0007] At least one of the front frame and the rear frame is integrally formed by casting.

[0008] In some embodiments, the front frame comprises:

[0009] A first longitudinal side wall and a second longitudinal side wall arranged in parallel;

[0010] The fuel tank support, the cab support and the water tank support are all fixedly arranged between the first longitudinal side wall and the second longitudinal side wall.

[0011] In some embodiments, the roller frame includes a first longitudinal bracket located between the first longitudinal side wall and the second longitudinal side wall, the first longitudinal bracket connecting the fuel tank support and the cab support, the fuel tank support and the cab support forming a hollow rectangular frame, and the first longitudinal bracket divides the rectangular frame into two hollow small rectangular frames.

[0012] In some embodiments, the cab support is constructed in an I-shape, including a first transverse bracket, a second transverse bracket and a second longitudinal bracket, the first transverse bracket and the second transverse bracket are arranged at intervals along the longitudinal direction of the frame, the second longitudinal bracket is connected to the first transverse bracket and the second transverse bracket respectively, and the first transverse bracket is connected to the fuel tank bracket.

[0013] In some embodiments, the water tank support is located below the cab support, and includes two sub-supports symmetrically arranged along the longitudinal direction of the frame, and the area between the two sub-supports is hollow.

[0014] In some embodiments, the water tank support is located at the bottom of the front frame, and a tungsten carbide coating is provided on the bottom of the water tank support.

[0015] In some embodiments, the roller frame includes a hinge column located between the oil tank support and the water tank support, which is used to be connected to a hinge device that hinges the front frame and the rear frame.

[0016] In some embodiments, the roller frame includes a support frame located between the first longitudinal side wall and the second longitudinal side wall, and the cab support, the water tank support and the hinge column are all connected to the support frame.

[0017] In some embodiments, the rear frame comprises:

[0018] a third longitudinal side wall and a fourth longitudinal side wall arranged in parallel,

[0019] The radiator support, the battery support, the power compartment support and the hinge portion are all fixedly arranged between the third longitudinal side wall and the fourth longitudinal side wall.

[0020] In some embodiments, viewed from the longitudinal side of the frame, the third longitudinal side wall or the fourth longitudinal side wall forms an L-shaped structure with the power compartment support.

[0021] In some embodiments, when viewed from the top of the vehicle frame, the third longitudinal side wall and the fourth longitudinal side wall, the radiator support and the power compartment support surround a hollow rectangular frame.

[0022] In some embodiments, the radiator support and the battery support are arranged side by side laterally along the frame and are both provided with a rectangular opening.

[0023] In some embodiments, the hinge portion is disposed at a longitudinal front end of the rear frame, and is used to install a hinge mechanism that hinges the front frame and the rear frame.

[0024] In some embodiments, the power compartment support is located at the bottom of the rear frame, and the bottom of the power compartment support is provided with a tungsten carbide coating.

[0025] On the other hand, the present application provides a road roller, comprising the above-mentioned road roller frame.

[0026] On the other hand, the present application provides a method for manufacturing a road roller frame, comprising:

[0027] Integrally forming at least one of the front frame and the rear frame by a casting process; and

[0028] The front frame and the rear frame are hingedly connected.

[0029] In some embodiments, the casting process is one of sand casting, lost foam casting and counter-gravity casting.

[0030] In some embodiments, the casting process comprises the following steps:

[0031] Making molds: Making sand molds and sand cores according to the models of the front frame and / or rear frame;

[0032] Paint: paint the sand mold and sand core, and dry the coating after painting;

[0033] Core lowering and box placing: placing the sand mold and sand core into the sand box, laying tungsten carbide particles in the area of ​​the sand mold corresponding to the water tank support of the front frame, or laying tungsten carbide particles in the area of ​​the sand mold corresponding to the bottom of the power compartment support of the rear frame;

[0034] Melting and pouring: melt the raw materials into liquid, pour the raw materials into the sand mold, the raw materials have the following components: C: 0.30%, Si: 0.05%, Mn: 0.70%, Nb: 0.008%, V: 0.015%, Ni: 0.6%, Cr: 0.30%, P: ≤0.020%, S: ≤0.005%, and the balance is Fe; and

[0035] Sand removal: After the frame casting solidifies, the frame casting is taken out of the box and left to air cool. After the frame casting is completely cooled, it is heat treated, and then shot peening, machining and other treatments are performed to obtain qualified frame samples.

[0036] In some embodiments, the casting process comprises the following steps:

[0037] Making mold: preparing the mold according to the model of the front frame and / or the rear frame;

[0038] Core making and core repairing: making and repairing sand cores;

[0039] Brushing paint: Brush paint on the sand core and dry the coating after brushing.

[0040] Modeling: New sand, old sand and auxiliary materials are mixed for modeling, and the amount of resin added is 1-2% of the total sand weight;

[0041] Lower core box assembly: put the sand core into the sand box, assemble the upper and lower boxes, and lay tungsten carbide particles in the area of ​​the sand mold corresponding to the water tank support of the front frame or lay tungsten carbide particles in the area of ​​the sand mold corresponding to the bottom of the power compartment support of the rear frame;

[0042] Melting and pouring: Melting the raw materials, the composition of the raw materials is C: 0.20%, Si: 0.1%, Mn: 0.6%, Nb: 0.005%, V: 0.010%, Ni: 0.5%, Cr: 0.20%, P: ≤0.020%, S: ≤0.005%, and the balance is Fe; pouring the raw materials into a sand mold, controlling the pouring temperature to 1620°C, and cooling and solidifying them in the mold; and

[0043] Sand removal: After the frame ingot solidifies, the frame ingot is taken out of the box and left to air cool. After the frame ingot is completely cooled, it is heat treated and the front frame and / or rear frame is obtained by shot peening and machining.

[0044] In some embodiments, the casting process comprises the following steps:

[0045] Making mold: preparing the mold according to the model of the front frame and / or the rear frame;

[0046] Paint: paint the shell model and dry the coating after painting;

[0047] Putting into the sand box: placing the sand mold in the sand box, pouring the mixture of raw sand and steel balls into the gap between the sand box and the sand mold and vibrating with the vibration plate, laying tungsten carbide particles in the area of ​​the sand mold corresponding to the water tank support of the front frame or laying tungsten carbide particles in the area of ​​the sand mold corresponding to the bottom of the power compartment support of the rear frame;

[0048] Melting and pouring: Melting the raw materials, the composition of the raw materials is C: 0.40%, Si: 0.4%, Mn: 1%, Nb: 0.03%, V: 0.030%, Ni: 1%, Cr: 0.50%, P: ≤0.020%, S: ≤0.005%, and the balance is Fe; pouring the raw materials into a sand mold, controlling the pouring temperature to 1650°C, and cooling and solidifying them in the mold; and

[0049] Sand removal: After the frame casting solidifies, the frame casting is taken out of the box and left to air cool. After the frame casting is completely cooled, it is heat treated and then shot peened and machined to obtain the front frame and / or rear frame.

[0050] The roller frame according to the present application integrates multiple separate and dispersed parts such as the frame side guard plates, cab supports and bottom supports into an integrated form, thereby achieving high integration and lightweight, reducing processing steps, shortening processing cycles, and improving production efficiency.

[0051] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0053] Figure 1 A schematic diagram of the structure of the front frame of an embodiment of the present application; and

[0054] Figure 2 This is a schematic structural diagram of the rear frame of an embodiment of the present application. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0056] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0057] In the description of the present application, it should be understood that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present application.

[0058] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, upright, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present application. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0059] The present application provides a roller frame. The roller frame includes a front frame 100, a rear frame 200 and a connection mechanism such as a hinge device. The front frame 100 and the rear frame 200 are hinged together through the connection mechanism, and the front frame 100 and the rear frame 200 are both integrally formed by casting.

[0060] Both the front frame and the rear frame are integrally formed by casting, which is beneficial to improving material utilization on the one hand, and improving the molding freedom of the roller frame on the other hand, so as to reasonably set the structure, shape, parameters, connection relationship and weight reduction process of each functional part while meeting the strength of the workpiece, and to simplify the structural design of the front frame 100 and the rear frame 200, so as to achieve lightweighting of the roller frame.

[0061] like Figure 1 As shown, the present application provides a roller frame including a front frame 100 and a rear frame 200, wherein the rear frame 200 is hingedly connected to the front frame 100 through a hinge mechanism, wherein one or both of the front frame 100 and the rear frame 200 are plate-type structures obtained by integral casting, and each component of the front frame 100 and the rear frame 200 is composed of plate-like components. This is beneficial to increasing the structural rigidity of the roller frame, improving the reliability of the roller frame, and contributing to the overall lightweight of the frame.

[0062] like Figure 1As shown, the front frame 100 includes a first longitudinal side wall 110 and a second longitudinal side wall 120, a fuel tank support 130, a cab support 140 and a water tank support 150 arranged in parallel. The fuel tank support 130, the cab support 140 and the water tank support 150 are all fixedly arranged between the first longitudinal side wall 110 and the second longitudinal side wall 120. The fuel tank support 130 is used to install the fuel tank, the cab support 24 is used to install the cab, and the water tank support 150 is used to install the water tank.

[0063] like Figure 1 As shown, the roller frame may include a first longitudinal bracket 170 located between the first longitudinal side wall 110 and the second longitudinal side wall 120, the first longitudinal bracket 170 connects the fuel tank support 130 and the cab support 140, the fuel tank support 30 and the cab support 140 form a hollow rectangular frame, the first longitudinal bracket 170 divides the rectangular frame into two hollow small rectangular frames, so that the rectangular frame forms a "sun" type structure.

[0064] like Figure 1 As shown, the cab support 140 can be constructed into an "I" type structure, which includes a first transverse bracket 141, a second transverse bracket 142 and a second longitudinal bracket 143. The first transverse bracket 141 and the second transverse bracket 142 are arranged at intervals along the longitudinal direction of the frame, and the two ends of the second longitudinal bracket 143 are respectively connected to the middle of the first transverse bracket 141 and the second transverse bracket 142. The first transverse bracket 141 is connected to the first longitudinal side wall 110, the second longitudinal side wall 120 and the fuel tank support 130, and the first transverse bracket 141 and the second transverse bracket 142 are provided with a plurality of cab mounting holes 144 for mounting the cab.

[0065] like Figure 1 As shown, the water tank support 150 may be located below the cab support 140 , and the water tank support 150 includes two sub-supports 151 symmetrically arranged along the longitudinal direction of the vehicle frame, and the area between the two sub-supports 151 is hollow.

[0066] The hollow design is also helpful in reducing deformation or damage caused by stress concentration due to uneven structural shape, and is helpful in making the front frame 100 of the roller as lightweight as possible while ensuring the overall structural strength, and is also helpful in extending the service life of the two longitudinal side walls.

[0067] The water tank support 150 is located at the bottom of the front frame 100, and a tungsten carbide coating is provided at the bottom of the water tank support 150 to improve the wear resistance of the front frame.

[0068] like Figure 1As shown, the roller frame may include a hinge column 160 located between the oil tank support 150 and the water tank support 150, which is used to be connected to a hinge device that hinges the front frame 100 and the rear frame 200.

[0069] like Figure 1 As shown, the roller frame may include a support frame 180 located between the first longitudinal side wall 110 and the second longitudinal side wall 120, the cab support 140, the water tank support 150 and the hinge column 160 are all connected to the support frame 180, and the cab support 140 is used to install the cab.

[0070] like Figure 2 As shown, the rear frame 200 includes a third longitudinal side wall 210 and a fourth longitudinal side wall 220, a radiator support 230, a battery support 240, a power compartment support 250 and a hinge portion 260 which are arranged in parallel. The radiator support 230, the battery support 240, the power compartment support 250 and the hinge portion 260 are all fixedly arranged between the third longitudinal side wall 210 and the fourth longitudinal side wall 220. The radiator support 230 is used to install a radiator, the battery support 240 is used to install a power battery, and the power compartment support 250 is used to install a motor and an electronic control device, etc. The third longitudinal side wall 210 and the fourth longitudinal side wall 220 adopt a structure with a hollow inner side.

[0071] The hollow design of the two longitudinal side walls of the rear frame is conducive to making the rear frame 200 of the roller as lightweight as possible while ensuring the overall structural strength of the rear frame 200 , and is also conducive to extending the service life of the rear frame 200 of the roller.

[0072] like Figure 2 As shown, viewed from the longitudinal side of the vehicle frame, the third longitudinal side wall 210 or the fourth longitudinal side wall 220 and the power compartment support 250 form an L-shaped structure.

[0073] When viewed from the top of the vehicle frame, the third longitudinal side wall 210 and the fourth longitudinal side wall 220 , the radiator support 230 and the engine compartment support 250 surround a hollow rectangular frame.

[0074] like Figure 2 As shown, the radiator support 230 and the battery support 240 are arranged side by side along the vehicle frame in a transverse direction and are both provided with a rectangular opening.

[0075] The hinge portion 250 is disposed at the longitudinal front end of the rear frame 200 and is used to install a hinge mechanism for hinge-connecting the front frame 100 and the rear frame 200 .

[0076] The power compartment support 250 is located at the bottom of the rear frame 200, and a tungsten carbide coating is provided at the bottom of the power compartment support 250 to improve the wear resistance of the rear frame.

[0077] The present application also provides a road roller comprising the above-mentioned road roller frame.

[0078] On the other hand, this application adopts an integrated casting process to integrate more than 50 existing individual parts into an integrated form, realizing integrated design, greatly reducing the processing procedures, reducing the processing volume, and improving the processing efficiency by more than 50%. The integrated forming also improves the lightweight level of the roller frame, reducing the weight by more than 20% compared with the welded frame. The overall frame has no welds, which improves the overall fatigue life by more than 30%. The wear resistance is improved by more than 30%.

[0079] On the other hand, the present application provides a method for manufacturing a roller frame, which includes forming a front frame 100 and a rear frame 200 into one piece by a casting process, and then hingedly connecting the front frame 100 and the rear frame 200 together by a hinge mechanism. Due to the use of the casting process, the manufacturing method is conducive to improving material utilization, reducing the processing amount of the roller frame, thereby reducing production time and improving production efficiency. First embodiment

[0080] The present application proposes a method for manufacturing a roller frame, which can be a process method such as sand casting, lost foam casting, and counter-gravity casting. Sand casting is used as an example to illustrate the casting process, and other methods can also be used. The casting process may include the following steps:

[0081] Making mold: Prepare the mold according to the model of at least one of the front frame and the rear frame. The mold can be a wooden mold, a metal mold or a 3D printing sand mold. Taking the 3D printing sand mold as an example, the average diameter of the original sand is 70 / 140 mesh, and the addition amount of resin and curing agent is 2.0-3.0wt.% and 0.5-0.6wt.% respectively;

[0082] Paint: Paint the sand mold and sand core, dry the coating after painting, check the quality of the sand mold, sand core and coating after drying, clean the paint sag and burrs, and re-paint the unqualified coating in some parts;

[0083] Lower the core and place it in the sand box: Purge the floating sand in the mold cavity and the exhaust hole, put the sand mold and sand core into the sand box, and place the molten steel filter, riser, asbestos pad, etc. In the area at the bottom of the water tank support of the front frame in the sand mold, lay 3-5mm thick tungsten carbide particles with a diameter of 1-2mm. When the molten steel is poured, the tungsten carbide particle layer is infiltrated to the bottom of the water tank to improve the wear resistance. In the area at the bottom of the power compartment support of the rear frame in the sand mold, lay 3-5mm thick tungsten carbide particles with a diameter of 1-2mm. When the molten steel is poured, the tungsten carbide particle layer is infiltrated to the bottom of the power compartment to improve the wear resistance;

[0084] Melting and pouring: put the raw materials into an electric arc furnace for melting, add appropriate amount of desulfurizer, alloy elements, etc. for refining after melting, and adjust the composition of the molten steel to C: 0.30%, Si: 0.05%, Mn: 0.70%, Nb: 0.008%, V: 0.015%, Ni: 0.6%, Cr: 0.30%, P: ≤0.020%, S: ≤0.005%, and the balance is Fe; pour the qualified molten steel into the ladle, put the ladle into the pouring table, pour the molten steel into the sand mold through the guide pipe, control the pouring temperature to 1600℃, and let it cool and solidify in the mold;

[0085] Sand removal: After the frame casting solidifies, the frame casting is taken out of the box and left to air cool. After the frame casting is completely cooled, it is heat treated, and then shot peening, machining and other treatments are performed to obtain a qualified frame. Second embodiment

[0086] The present application proposes a method for manufacturing a road roller frame, which may include a casting process of sand casting, lost foam casting or counter-gravity casting. Sand casting is used as an example to illustrate the manufacturing process. Of course, other casting processes may also be used. The casting process may include the following steps:

[0087] Making a mold: preparing a mold according to the model of at least one of the front frame and the rear frame. The mold can be a wooden mold, a metal mold, a 3D printed sand mold, or other. Take a metal mold or a wooden mold as an example;

[0088] Core making and core repairing: making sand cores, cleaning burrs and seams on the surface of sand cores, and repairing pits and looseness on the molding surface of sand cores;

[0089] Paint: Paint the sand core, dry the coating after painting, check the quality of the sand core and coating after drying, clean the paint sag and burrs, and re-paint the unqualified coating in some parts;

[0090] Modeling: Mix new sand, old sand and auxiliary materials for modeling, and the amount of resin added is 1-2% of the total sand weight;

[0091] Lower core box assembly: Purge the floating sand in the cavity and exhaust hole, put the sand core 1 into the sand box, combine the upper and lower boxes, and place the molten steel filter, riser, asbestos pad, etc. Lay 3-5mm thick tungsten carbide particles with a diameter of 1-2mm at the bottom of the water tank support of the front frame. This tungsten carbide particle layer is infiltrated to the bottom of the water tank when the molten steel is poured, improving the wear resistance. Lay 3-5mm thick tungsten carbide particles with a diameter of 1-2mm at the bottom of the power compartment support of the rear frame. This tungsten carbide particle layer is infiltrated to the bottom of the power compartment when the molten steel is poured, improving the wear resistance;

[0092] Melting and pouring: put the raw materials into an electric arc furnace for melting, add appropriate amount of desulfurizer, alloy elements, etc. for refining after melting, adjust the composition of the molten steel to C: 0.20%, Si: 0.1%, Mn: 0.6%, Nb: 0.005%, V: 0.010%, Ni: 0.5%, Cr: 0.20%, P: ≤0.020%, S: ≤0.005%, and the balance is Fe; pour the qualified molten steel into the ladle, put the ladle into the pouring table, pour the molten steel into the sand mold through the guide pipe, control the pouring temperature to 1620℃, and let it cool and solidify in the mold;

[0093] Sand removal: After the frame casting solidifies, the frame casting is taken out of the box and left to air cool. After the frame casting is completely cooled, it is heat treated, and then shot peening, machining and other treatments are performed to obtain a qualified frame. Third embodiment

[0094] The present application proposes a method for manufacturing a road roller frame, which may include sand casting, lost foam casting or counter-gravity casting, etc. Sand casting is used as an example to illustrate the casting process. Of course, other casting processes may also be used. The casting process may include the following steps:

[0095] Making mold: Prepare the mold according to the model of at least one of the front frame and the rear frame. The mold can be a wooden mold, a metal mold or a 3D printed sand mold. Taking the 3D printed shell model as an example, the frame shell model is prepared based on the 3D sand printing technology: the shell model includes a pouring cup, a sprue, a cross runner and a riser. The average diameter of the original sand is 70 / 140 mesh, and the addition amount of resin and curing agent is 5.0-6.0wt.% and 0.6-0.7wt.% respectively;

[0096] Paint: paint the shell model, dry the coating after painting, check the shell model and coating quality after drying, clean the paint sag and burrs, and repaint the unqualified coating in some parts;

[0097] Put it into the sand box: After the sand mold is matched, it is placed in the sand box, and the "raw sand + steel ball" mixture is poured into the gap between the sand box and the sand mold, and vibrated with the vibration plate. After the pouring is completed, the sand box is inverted on the low-pressure sealing tank, and the shell model pouring cup is aligned with the riser and fixed. A layer of asbestos sealing pad is also laid between the sand box and the sealing tank. A 3-5mm thick tungsten carbide particle with a diameter of 1-2mm is laid at the bottom of the water tank support of the front frame. When the molten steel is poured, this tungsten carbide particle layer is infiltrated to the bottom of the water tank to improve the wear resistance. A 3-5mm thick tungsten carbide particle with a diameter of 1-2mm is laid at the bottom of the power compartment support of the rear frame. When the molten steel is poured, this tungsten carbide particle layer is infiltrated to the bottom of the power compartment to improve the wear resistance;

[0098] Melting and pouring: put the raw materials into an electric arc furnace for melting, add appropriate amount of desulfurizer, alloy elements, etc. for refining after melting, adjust the composition of the molten steel to C: 0.40%, Si: 0.4%, Mn: 1%, Nb: 0.03%, V: 0.030%, Ni: 1%, Cr: 0.50%, P: ≤0.020%, S: ≤0.005%, and the balance is Fe; pour the qualified molten steel into the ladle, put the ladle into the pouring table, pour the molten steel into the sand mold through the guide pipe, control the pouring temperature to 1650℃, and let it cool and solidify in the mold;

[0099] Sand removal: After the frame ingot solidifies, the frame ingot is taken out of the box and left to air cool. After the frame ingot is completely cooled, it is heat treated and then shot peening, machining and other processes are performed to obtain the frame.

[0100] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and not to limit it. Although the present application has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present application can still be modified or some technical features can be replaced by equivalents, which should all be included in the scope of the technical solution requested for protection in this application.

Claims

1. A road roller frame, comprising: Front frame (100); A rear frame (200) is hingedly connected to the front frame (100); as well as At least one of the front frame (100) and the rear frame (200) is formed by integral casting.

2. The roller frame according to claim 1, wherein the front frame (100) comprises: A first longitudinal side wall (110) and a second longitudinal side wall (120) arranged in parallel; The oil tank support (130), the cab support (140) and the water tank support (150) are all fixedly arranged between the first longitudinal side wall (110) and the second longitudinal side wall (120).

3. The roller frame according to claim 2, comprises a first longitudinal bracket (170) located between the first longitudinal side wall (110) and the second longitudinal side wall (120), the first longitudinal bracket (170) connecting the fuel tank support (130) and the cab support (140), the fuel tank support (130) and the cab support (140) forming a hollow rectangular frame, and the first longitudinal bracket (170) divides the rectangular frame into two hollow small rectangular frames.

4. The roller frame according to claim 2, wherein the cab support (140) is constructed in an I-shape, comprising a first transverse support (141), a second transverse support (142) and a second longitudinal support (143), wherein the first transverse support (141) and the second transverse support (142) are arranged at intervals along the longitudinal direction of the frame, the second longitudinal support (143) is respectively connected to the first transverse support (141) and the second transverse support (142), and the first transverse support (141) is connected to the fuel tank support (130).

5. The roller frame according to claim 2, wherein the water tank support (150) is located below the cab support (140), and comprises two sub-supports (151) symmetrically arranged along the longitudinal direction of the frame, and the area between the two sub-supports (151) is hollow.

6. The roller frame according to claim 5, wherein the water tank support (150) is located at the bottom of the front frame (100), and the bottom of the water tank support (150) is provided with a tungsten carbide coating.

7. The roller frame according to claim 2, comprising a hinge column (160) located between the oil tank support (150) and the water tank support (150), used to be connected to a hinge device that hinges the front frame (100) and the rear frame (200).

8. The roller frame according to claim 2, comprising a support frame (180) located between the first longitudinal side wall (110) and the second longitudinal side wall (120), the cab support (140), the water tank support (150) and the hinge column (160) are all connected to the support frame (180).

9. The road roller frame according to claim 1, wherein the rear frame (200) comprises: A third longitudinal side wall (210) and a fourth longitudinal side wall (220) arranged in parallel, The radiator support (230), the battery support (240), the power compartment support (250) and the hinge portion (260) are all fixedly arranged between the third longitudinal side wall (210) and the fourth longitudinal side wall (220).

10. The roller frame according to claim 9, wherein when viewed from the longitudinal side of the frame, the third longitudinal side wall (210) or the fourth longitudinal side wall (220) and the power compartment support (250) form an L-shaped structure.

11. The roller frame according to claim 9, wherein when viewed from the top of the frame, the third longitudinal side wall (210) and the fourth longitudinal side wall (220), the radiator support (230) and the power compartment support (250) surround a hollow rectangular frame.

12. The roller frame according to claim 9, wherein the radiator support (230) and the battery support (240) are arranged side by side along the frame in a transverse direction and are both provided with a rectangular opening.

13. The roller frame according to claim 9, wherein the hinge portion (250) is arranged at the longitudinal front end of the rear frame (200) for installing a hinge mechanism for hinge-connecting the front frame (100) and the rear frame (200).

14. The roller frame according to claim 9, wherein the power compartment support (250) is located at the bottom of the rear frame (200), and the bottom of the power compartment support (250) is provided with a tungsten carbide coating.

15. A road roller, comprising the road roller frame according to any one of claims 1 to 14.

16. A method for manufacturing a road roller frame according to any one of claims 1 to 14, comprising: At least one of the front frame (100) and the rear frame (200) is integrally formed by a casting process; as well as The front frame (100) and the rear frame (200) are hingedly connected.

17. The manufacturing method according to claim 16, wherein the casting process is one of sand casting, lost foam casting and counter-gravity casting.

18. The manufacturing method according to claim 16, wherein the casting process comprises the following steps: Making a mold: making a mold according to a model of at least one of the front frame and the rear frame; Paint: paint the sand mold and sand core, and dry the coating after painting; Core lowering and box placing: placing the sand mold and sand core into the sand box, laying tungsten carbide particles in the area of ​​the sand mold corresponding to the water tank support of the front frame, or laying tungsten carbide particles in the area of ​​the sand mold corresponding to the bottom of the power compartment support of the rear frame; Melting and pouring: melt the raw materials into liquid, pour the raw materials into the sand mold, the raw materials have the following components: C: 0.30%, Si: 0.05%, Mn: 0.70%, Nb: 0.008%, V: 0.015%, Ni: 0.6%, Cr: 0.30%, P: ≤0.020%, S: ≤0.005%, and the balance is Fe; and Sand removal: After the frame casting solidifies, the frame casting is taken out of the box and left to air cool. After the frame casting is completely cooled, it is heat treated, and then shot peening, machining and other treatments are performed to obtain qualified frame samples.

19. The manufacturing method according to claim 16, wherein the casting process comprises the following steps: Making a mold: preparing a mold according to a model of at least one of the front frame and / or the rear frame; Core making and core repairing: making and repairing sand cores; Paint: paint the sand core and dry the coating after painting; Modeling: New sand, old sand and auxiliary materials are mixed for modeling, and the amount of resin added is 1-2% of the total sand weight; Lower core box assembly: put the sand core into the sand box, assemble the upper and lower boxes, and lay tungsten carbide particles in the area of ​​the sand mold corresponding to the water tank support of the front frame or lay tungsten carbide particles in the area of ​​the sand mold corresponding to the bottom of the power compartment support of the rear frame; Melting and pouring: melt the raw materials, the composition of the raw materials is C: 0.20%, Si: 0.1%, Mn: 0.6%, Nb: 0.005%, V: 0.010%, Ni: 0.5%, Cr: 0.20%, P: ≤0.020%, S: ≤0.005%, and the balance is Fe; pour the raw materials into the sand mold, control the pouring temperature to 1620℃, and cool and solidify it in the mold; as well as Sand removal: After the frame ingot solidifies, the frame ingot is taken out of the box and left to air cool. After the frame ingot is completely cooled, it is heat treated and the front frame and / or rear frame is obtained by shot peening and machining.

20. The manufacturing method according to claim 16, wherein the casting process comprises the following steps: Making a mold: preparing a mold according to a model of at least one of the front frame and / or the rear frame; Paint: paint the shell model and dry the coating after painting; Putting into the sand box: placing the sand mold in the sand box, pouring the mixture of raw sand and steel balls into the gap between the sand box and the sand mold and vibrating with the vibration plate, laying tungsten carbide particles in the area of ​​the sand mold corresponding to the water tank support of the front frame or laying tungsten carbide particles in the area of ​​the sand mold corresponding to the bottom of the power compartment support of the rear frame; Melting and pouring: melt the raw materials, the composition of the raw materials is C: 0.40%, Si: 0.4%, Mn: 1%, Nb: 0.03%, V: 0.030%, Ni: 1%, Cr: 0.50%, P: ≤0.020%, S: ≤0.005%, and the balance is Fe; pour the raw materials into the sand mold, control the pouring temperature to 1650℃, and cool and solidify them in the mold; as well as Sand removal: After the frame ingot solidifies, the frame ingot is taken out of the box and left to air cool. After the frame ingot is completely cooled, it is heat treated and then shot peened and machined to obtain the front frame and / or rear frame.

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