Road roller frame and manufacturing method therefor, and road roller

Abstract

A road roller frame and a manufacturing method therefor, and a road roller. The road roller frame comprises: a front frame (100); and a rear frame (200), which is hinged to the front frame (100), wherein at least one of the front frame (100) and the rear frame (200) is integrally formed by casting. Therefore, a high degree of integration and a light weight are achieved, processing procedures are reduced, the processing period is shortened, and the production efficiency is improved.

Description

Road roller frame, manufacturing method thereof, and road roller Technical Field

[0001] The present disclosure 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 using traditional methods of stamping and welding, which has problems such as large processing volume, numerous steps, 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 tooling 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. As a result, the frame is not lightweight enough, the heat-affected zone of the weld is prone to fatigue failure, the bottom of the water tank support and the bottom of the power compartment are prone to wear and failure, and cannot adapt to the harsh working conditions of construction machinery. Summary of the Invention

[0004] The present disclosure 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-brackets symmetrically arranged along the longitudinal direction of the frame, and the area between the two sub-brackets is hollow.

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

[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 vehicle 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, 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 along the vehicle frame, and both are provided with a rectangular opening.

[0023] In some embodiments, the hinge portion is provided at a longitudinal front end of the rear frame for installing a hinge mechanism for hinge-connecting 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 disclosure provides a road roller comprising the above-mentioned road roller frame.

[0026] In another aspect, the present disclosure provides a method for manufacturing a road roller frame, comprising:

[0027] integrally forming at least one of the front frame and the rear frame through 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 includes the following steps:

[0031] Mould making: making sand moulds and sand cores according to the model 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 setting and box placement: Place the sand mold and sand core into the sand box, 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;

[0034] Melting and pouring: melting the raw materials into liquid form and pouring the raw materials into a sand mold. The raw materials have the following composition: 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 it is completely cooled, the frame casting is heat treated, and then shot blasting, machining and other processes are performed to obtain qualified frame samples.

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

[0037] Making mold: preparing the mold according to the model of the front frame and / or 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 to make the modeling, and the amount of resin added is 1-2% of the total sand weight;

[0041] Core setting and box assembling: Place the sand core into the sand box, assemble the upper and lower boxes together, 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 which 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 at 1620°C, and allowing them to cool and solidify in the mold; and

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

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

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

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

[0047] Place the sand mold in the sand box: Place the sand mold in the sand box, pour a mixture of raw sand and steel balls into the gap between the sand box and the sand mold, and vibrate with a vibrating plate. 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;

[0048] Melting and pouring: Melting the raw materials, the composition of which 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 at 1650°C, and allowing them to cool and solidify in the mold; and

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

[0050] According to the roller frame disclosed herein, multiple separate and dispersed components such as the frame side guard plates, cab supports and bottom supports are integrated into one, achieving high integration and lightweight, reducing processing steps, shortening processing cycles, and improving production efficiency.

[0051] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure 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 disclosure and constitute a part of the present disclosure. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation of the present disclosure. In the drawings:

[0053] FIG1 is a schematic structural diagram of a front frame according to an embodiment of the present disclosure; and

[0054] FIG2 is a schematic structural diagram of a rear frame according to an embodiment of the present disclosure. DETAILED DESCRIPTION

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

[0056] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

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

[0058] In the description of the present disclosure, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, upright, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present disclosure and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element 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 disclosure; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0059] The present disclosure provides a road roller frame. The road roller frame includes a front frame 100, a rear frame 200, and a connecting mechanism, such as a hinge. The front frame 100 and the rear frame 200 are hinged together by the connecting 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 increasing the molding freedom of the roller frame on the other hand. This is beneficial to reasonably setting the structure, shape, parameters, connection relationship and weight reduction process of each functional part while meeting the strength of the workpiece, which is beneficial to simplifying the structural design of the front frame 100 and the rear frame 200, thereby facilitating the lightweighting of the roller frame.

[0061] As shown in FIG1 , the present disclosure provides a road roller frame including a front frame 100 and a rear frame 200. The rear frame 200 is hingedly connected to the front frame 100 via a hinge mechanism. One or both of the front frame 100 and the rear frame 200 are plate-type structures obtained by integral casting. The plate-type structure means that all components of the front frame 100 and the rear frame 200 are composed of plate-like members, which is beneficial to increasing the structural rigidity of the road roller frame, improving the reliability of the road roller frame, and contributing to the overall lightweighting of the frame.

[0062] As shown in Figure 1, the front frame 100 includes a first longitudinal side wall 110 and a second longitudinal side wall 120 arranged in parallel, a fuel tank support 130, a cab support 140 and a water tank support 150. 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] As shown in Figure 1, 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] As shown in Figure 1 , the cab support 140 can be constructed in an "I"-shaped structure, comprising 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 spaced apart longitudinally along the vehicle frame, and the ends of the second longitudinal bracket 143 are respectively connected to the middle portions of the first transverse bracket 141 and the second transverse bracket 142. The first transverse bracket 141 is connected to the first longitudinal sidewall 110, the second longitudinal sidewall 120, and the fuel tank support 130. 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] As shown in FIG1 , the water tank support 150 may be located below the cab support 140 . The water tank support 150 includes two sub-supports 151 symmetrically arranged along the longitudinal direction of the vehicle frame. The area between the two sub-supports 151 is hollow.

[0066] The hollow design is also beneficial to reducing deformation or damage caused by stress concentration due to uneven structural shape, and is beneficial to making the front frame 100 of the roller as lightweight as possible while ensuring the overall structural strength, and is also beneficial to 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 on the bottom of the water tank support 150 to improve the wear resistance of the front frame.

[0068] As shown in FIG. 1 , the roller frame may include a hinge column 160 located between the oil tank support 150 and the water tank support 150 , for connecting to a hinge device that hinges the front frame 100 and the rear frame 200 .

[0069] As shown in FIG1 , 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] As shown in Figure 2, the rear frame 200 includes a third longitudinal side wall 210 and a fourth longitudinal side wall 220 arranged in parallel, a radiator support 230, a battery support 240, a power compartment support 250 and a hinge portion 260. 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 the radiator, the battery support 240 is used to install the power battery, and the power compartment support 250 is used to install the motor and electronic control device. The third longitudinal side wall 210 and the fourth longitudinal side wall 220 adopt a hollow inner structure.

[0071] The hollow design of the two longitudinal side walls of the rear frame is beneficial for 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 beneficial for extending the service life of the rear frame 200 of the roller.

[0072] As shown in FIG. 2 , 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] Looking down 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] As shown in FIG2 , the radiator support 230 and the battery support 240 are arranged side by side along the horizontal direction of the vehicle frame, and both are provided with a rectangular opening.

[0075] The hinge portion 250 is provided at the longitudinal front end of the rear frame 200 and is used for installing 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 the bottom of the power compartment support 250 is provided with a tungsten carbide coating to improve the wear resistance of the rear frame.

[0077] The present disclosure also provides a road roller comprising the road roller frame.

[0078] Furthermore, the present invention utilizes an integrated casting process to integrate over 50 previously separate parts, achieving an integrated design. This significantly reduces the number of processing steps and workload, improving processing efficiency by over 50%. This integrated molding process also significantly reduces the weight of the roller frame, reducing it by over 20% compared to welded frames. The seamless frame also extends fatigue life by over 30%, and increases wear resistance by over 30%.

[0079] Another aspect of the present disclosure provides a method for manufacturing a road roller frame. The method includes integrally forming a front frame 100 and a rear frame 200 through a casting process, and then articulating the front frame 100 and the rear frame 200 together using an articulated mechanism. Due to the use of the casting process, the method improves material utilization and reduces the amount of machining required for the road roller frame, thereby reducing production time and improving production efficiency.

[0080] First embodiment

[0081] The present disclosure provides a method for manufacturing a road roller frame. The manufacturing method may be sand casting, lost foam casting, counter-gravity casting, or other process methods. Sand casting is used as an example to illustrate the casting process. Other methods may also be used. The casting process may include the following steps:

[0082] Mold making: Prepare a mold based on the model of at least one of the front and rear frames. The mold can be a wooden mold, a metal mold, or a 3D printed sand mold. Taking 3D printed sand molds as an example, the average diameter of the raw sand is 70 / 140 mesh, and the added amounts of resin and curing agent are 2.0-3.0wt.% and 0.5-0.6wt.%, respectively.

[0083] 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 parts;

[0084] Lowering the core and placing it in the sand box: Purge the floating sand in the mold cavity and exhaust holes, place the sand mold and sand core into the sand box, and place the molten steel filter, riser, asbestos pad, etc. In the sand mold, a 3-5mm thick layer of tungsten carbide particles with a diameter of 1-2mm is laid in the area at the bottom of the water tank support corresponding to the front frame. When the molten steel is poured, the tungsten carbide particle layer is infiltrated into the bottom of the water tank to improve the wear resistance. In the sand mold, a 3-5mm thick layer of tungsten carbide particles with a diameter of 1-2mm is laid in the area at the bottom of the power compartment support corresponding to the rear frame. When the molten steel is poured, the tungsten carbide particle layer is infiltrated into the bottom of the power compartment to improve the wear resistance.

[0085] Melting and pouring: The raw materials are placed in an electric arc furnace for melting. After melting, appropriate amounts of desulfurizers and alloying elements are added for refining. The composition of the molten steel is adjusted 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. The qualified molten steel is poured into a ladle, which is placed on a pouring table. The molten steel is poured into a sand mold through a draft pipe. The pouring temperature is controlled at 1600°C and allowed to cool and solidify in the mold.

[0086] Sand removal: After the frame casting solidifies, the frame casting is taken out of the box and left to air cool. After it is completely cooled, the frame casting is heat treated and then shot blasted, machined and other processes to obtain a qualified frame.

[0087] Second embodiment

[0088] The present disclosure provides a method for manufacturing a road roller frame. The method 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:

[0089] Mold making: A mold is prepared 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 types. Take a metal mold or a wooden mold as an example;

[0090] 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;

[0091] 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 repaint the unqualified parts;

[0092] 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;

[0093] Lowering the core and assembling the box: Purge the floating sand in the mold cavity and exhaust holes, place the sand core 1 in the sand box, assemble the upper and lower boxes, and place the molten steel filter, riser, asbestos pad, etc. on the bottom of the water tank support of the front frame. This tungsten carbide particle layer with a thickness of 3-5mm and a diameter of 1-2mm is laid on the bottom of the water tank support of the front frame. When the molten steel is poured, this tungsten carbide particle layer is infiltrated into the bottom of the water tank to improve wear resistance. Lay tungsten carbide particles with a thickness of 3-5mm and a diameter of 1-2mm on the bottom of the power compartment support of the rear frame. This tungsten carbide particle layer is infiltrated into the bottom of the power compartment when the molten steel is poured, to improve wear resistance.

[0094] Melting and pouring: The raw materials are placed in an electric arc furnace for melting. After melting, appropriate amounts of desulfurizers and alloying elements are added for refining. The composition of the molten steel is adjusted 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. The qualified molten steel is poured into a ladle, which is placed on a pouring table. The molten steel is poured into a sand mold through a draft pipe. The pouring temperature is controlled at 1620°C and allowed to cool and solidify in the mold.

[0095] Sand removal: After the frame casting solidifies, the frame casting is taken out of the box and left to air cool. After it is completely cooled, the frame casting is heat treated and then shot blasted, machined and other processes to obtain a qualified frame.

[0096] Third embodiment

[0097] The present disclosure provides a method for manufacturing a road roller frame. The manufacturing method may include sand casting, lost foam casting, or counter-gravity casting. 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:

[0098] Mold making: A mold is prepared based on a model of at least one of the front and rear frames. The mold can be a wooden mold, a metal mold, or a 3D-printed sand mold. For example, a 3D-printed shell model is used. The frame shell model is prepared using 3D sand printing technology. The shell model includes a pouring cup, sprue, runner, and riser. The average diameter of the raw sand is 70 / 140 mesh. The resin and curing agent are added in amounts of 5.0-6.0 wt.% and 0.6-0.7 wt.%, respectively.

[0099] 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, etc.

[0100] 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 a vibrating plate. After the pouring is completed, the sand box is placed upside down on the low-pressure sealing tank, and the shell model pouring cup is aligned with the riser and fixed. A layer of asbestos sealing gasket is also laid between the sand box and the sealing tank. Tungsten carbide particles with a thickness of 3-5mm and a diameter of 1-2mm are laid on the bottom of the water tank support of the front frame. When the molten steel is poured, this tungsten carbide particle layer is infiltrated into the bottom of the water tank to improve the wear resistance. Tungsten carbide particles with a thickness of 3-5mm and a diameter of 1-2mm are laid on the bottom of the power compartment support of the rear frame. When the molten steel is poured, this tungsten carbide particle layer is infiltrated into the bottom of the power compartment to improve the wear resistance;

[0101] Melting and pouring: The raw materials are placed in an electric arc furnace for melting. After melting, appropriate amounts of desulfurizers and alloying elements are added for refining. The composition of the molten steel is adjusted 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. The qualified molten steel is poured into a ladle, which is placed on a pouring table. The molten steel is poured into a sand mold through a draft pipe. The pouring temperature is controlled at 1650°C and allowed to cool and solidify in the mold.

[0102] Sand removal: After the frame casting solidifies, the frame casting is taken out of the box and left to air cool. After it is completely cooled, the frame casting is heat treated and then shot blasted, machined and other processes are performed to obtain the frame.

[0103] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure and are not intended to limit them. Although the present disclosure has been described in detail with reference to preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present disclosure can still be modified or some technical features can be replaced by equivalents, which should all be included in the scope of the technical solutions claimed for protection in the present disclosure.

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 integrally formed by casting.

2. The road 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), wherein the first longitudinal bracket (170) connects the fuel tank support (130) and the cab support (140), and the fuel tank support (130) and the cab support (140) form a hollow rectangular frame, and the first longitudinal bracket (170) divides the rectangular frame into two small hollow rectangular frames.

4. The roller frame according to claim 2 or 3, wherein the cab support (140) is constructed in an I-shape, including 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 any one of claims 2 to 4, wherein the water tank support (150) is located below the cab support (140), and includes 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 any one of claims 2 to 6, comprises a hinge column (160) located between the oil tank support (150) and the water tank support (150), for connecting to a hinge device that hinges the front frame (100) and the rear frame (200).

8. The roller frame according to any one of claims 2 to 7, 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 any one of claims 1 to 8, 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 road roller frame according to claim 9, wherein, 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 or 10, 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 road roller frame according to any one of claims 9 to 11, wherein the radiator support (230) and the battery support (240) are arranged side by side in a transverse direction along the frame and are both provided with a rectangular opening.

13. The road roller frame according to any one of claims 9 to 12, wherein the hinge portion (250) is provided 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 road roller frame according to any one of claims 9 to 13, 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 setting and box placement: Place the sand mold and sand core into the sand box, 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: melting the raw materials into liquid form and pouring the raw materials into a sand mold. The raw materials have the following composition: 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 it is completely cooled, the frame casting is heat treated, and then shot blasting, machining and other processes 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 to make the modeling, and the amount of resin added is 1-2% of the total sand weight; Core setting and box assembling: Place the sand core into the sand box, assemble the upper and lower boxes together, 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: Melting the raw materials, the composition of which 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 at 1620°C, and allowing them to cool and solidify in the mold; and Sand removal: After the frame ingot solidifies, it is taken out of the box and left to air-cool. After it is completely cooled, the frame ingot is heat treated and shot peening and machining are performed to obtain the front frame and / or rear frame.

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; Place the sand mold in the sand box: Place the sand mold in the sand box, pour a mixture of raw sand and steel balls into the gap between the sand box and the sand mold, and vibrate with a vibrating plate. 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: Melting the raw materials, the composition of which 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 at 1650°C, and allowing them to cool and solidify in the mold; and Sand removal: After the frame ingot solidifies, it is taken out of the box and left to air-cool. After it is completely cooled, the frame ingot is heat treated and then shot peened and machined to obtain the front frame and / or rear frame.

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