Large tonnage single steel wheel roller wear-resistant steel wheel and wear-resistant steel plate layer assembly welding process

Abstract

This invention discloses a wear-resistant steel wheel and wear-resistant steel plate layer assembly and welding process for a large-tonnage single steel drum road roller, belonging to the technical field of engineering machinery road rollers. Addressing industry problems such as high overall scrapping costs of existing steel wheels, easy delamination of the welded wear-resistant layer, stress concentration cracking in straight seams, and weak connections between separate liners leading to mud and sand ingress, this invention employs a base wheel encased in separate wear-resistant steel plates. The steel plates have arrayed plug weld grooves and bevels for composite fusion. The sides of the steel plates are obliquely butt-welded and fully sealed. A standardized five-step assembly and welding process is implemented, including prefabrication, positioning, plug welding, full welding, and grinding. The oblique seams disperse impact loads and eliminate stress concentration; the deep fusion of the plug welds prevents the wear-resistant layer from falling off; the full welding seals the interlayer to prevent internal corrosion; and individual wear-resistant steel plates can be replaced separately, significantly extending the service life of the steel wheel, significantly reducing the overall machine maintenance cost, and making it suitable for heavy-duty compaction conditions exceeding 20 tons.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery road roller technology, and in particular to the wear-resistant steel wheel for a large-tonnage single steel drum road roller and the assembly and welding process of its wear-resistant steel plate layer. Background Technology

[0002] This invention relates to the field of engineering machinery road roller technology, and is particularly applicable to large-tonnage single steel drum vibratory road rollers of 20t and above. Large-tonnage road rollers are mostly used in harsh compaction conditions such as water conservancy dams and mining crushing. During operation, the steel drum is continuously subjected to high-frequency impact and friction crushing of hard fillers. Traditional steel wheel rims have insufficient wear resistance, and the mainstream wear resistance improvement solutions in the industry have multiple defects that are difficult to eradicate.

[0003] Existing integral steel wheels are made of Q355 ordinary structural steel, which has poor wear resistance. After long-term rolling over rockfills and slag, the wheel rims wear and deform rapidly, and once the roundness fails, the entire wheel must be scrapped and replaced, resulting in high equipment maintenance costs. To address this defect, existing improvement methods fall into two categories. The first is to weld a wear-resistant layer onto the entire wheel rim surface. However, the thickness of the weld layer is limited, and the internal residual stress is high. Under the high-frequency alternating vibration of the road roller, it is prone to delamination, peeling, and cracking, resulting in a short wear-resistant service life. The second is a split wear-resistant liner structure. This structure generally adopts a straight seam butt joint. When the steel wheel touches the ground and rolls, the vertical straight seam directly bears the concentrated impact load, resulting in significant stress concentration at the weld position. Under long-term alternating loads, the weld cracks and chips, which is the core weak point of steel wheel failure.

[0004] Meanwhile, existing split-type lining plates mostly rely on bolt fastening or partial spot welding for fixation. There are assembly gaps between the plate and the base wheel rim, allowing gravel and sand to easily penetrate the interlayer, causing internal corrosion and abrasive wear, accelerating structural loosening and failure. Furthermore, traditional fixing methods only involve single-sided welding, resulting in a small bonding area and shallow weld depth between the wear-resistant plate and the base. Under heavy-load vibration conditions, the lining plate is prone to hollowing and detachment. In summary, there is currently a lack of a wear-resistant steel wheel with uniform weld stress without stress concentration, high wear-resistant layer bonding strength, the ability to be partially replaced after wear, and suitability for heavy-duty, high-frequency vibration conditions, along with a matching assembly and welding process. Summary of the Invention

[0005] The purpose of this invention is to overcome the problems in the prior art and provide a wear-resistant steel wheel for large-tonnage single-drum road rollers and its wear-resistant steel plate layer assembly and welding process. The core technical idea of ​​this invention is to construct a three-in-one protection system of "split wear resistance + oblique joint crack resistance + composite locking". Multiple arc-shaped wear-resistant steel plates are used to cover the base wheel rim, replacing the traditional straight joint with an oblique butt joint. The oblique surface disperses the rolling impact load, blocking the straight crack propagation path and solving the stress concentration problem. By opening an array of plug weld grooves on the plate surface and performing plug welding, a three-dimensional composite connection of "plug welding + fusion welding" is formed, significantly improving the interface bonding strength and eliminating the risk of delamination. Combined with a fully enclosed full welding process, a rigid and strong coupling between the wear-resistant layer and the base material is achieved, along with interlayer protection, ultimately achieving excellent results in high wear resistance, crack resistance, and partial replacement capability.

[0006] To achieve the aforementioned objectives, the present invention employs the following technical solution: a wear-resistant steel wheel for a large-tonnage single-drum road roller, comprising a base wheel rim, an inner cylinder, a drive-side reinforcing component, and a vibration-side reinforcing component. The drive-side reinforcing component and the vibration-side reinforcing component are respectively disposed at both ends inside the base wheel rim and connected to the inner cylinder. A wear-resistant steel plate layer is fixedly covered on the outer circumference of the base wheel rim. The wear-resistant steel plate layer is formed by at least two arc-shaped wear-resistant steel plates joined end-to-end to form a complete cylindrical structure. Each arc-shaped wear-resistant steel plate... The inner surface is attached to the outer surface of the base wheel rim; each of the arc-shaped wear-resistant steel plates has several plug weld grooves that extend through the plate thickness. The arc-shaped wear-resistant steel plates are fixed to the outer surface of the base wheel rim by a composite welding method of plug welding inside the plug weld grooves and fusion welding of the inner contact surface; the splicing side of the arc-shaped wear-resistant steel plates has a beveled cut structure, and the sides of two adjacent arc-shaped wear-resistant steel plates are joined to form a beveled butt joint. The beveled butt joint is filled with a continuous beveled full weld, so that multiple arc-shaped wear-resistant steel plates are enclosed to form a closed wear-resistant outer ring. This structure replaces the traditional straight seam with an oblique butt joint, which evenly distributes the rolling impact load along the oblique surface, blocking the straight propagation path of cracks and effectively solving the problems of stress concentration and fatigue cracking in the weld. At the same time, the composite connection method combining plug welding and fusion welding realizes three-dimensional fusion between the wear-resistant plate and the substrate, which greatly improves the bonding strength and eliminates the risk of delamination. The closed outer ring structure prevents sand and gravel from intruding into the interlayer and extends the service life of the steel wheel.

[0007] Furthermore, the arc-shaped wear-resistant steel plate is made of NM400 or NM450 wear-resistant steel plate, and the base wheel rim is made of Q355 or Q460 high-strength structural steel. Through the material matching of the outer high-hardness wear-resistant steel plate and the inner high-strength structural steel, the abrasive wear resistance and impact resistance of the working surface are significantly improved while ensuring the overall structural rigidity and fatigue resistance of the steel wheel, achieving a dual optimization of structural strength and wear resistance.

[0008] Furthermore, the plug weld groove is an elongated waist-shaped groove or a circular groove, and several of the plug weld grooves are arranged in a matrix uniform array along the circumference and axial direction of the arc-shaped wear-resistant steel plate. The uniform array design of the plug weld grooves ensures that the welding fusion points are evenly distributed and the stress is symmetrical, so that the arc-shaped wear-resistant steel plate is firmly bonded to the base wheel rim throughout the entire range, avoiding excessive local stress, and further enhancing the reliability and load-bearing capacity of the connection structure.

[0009] Furthermore, the edge of the plug weld groove is provided with a welding bevel, allowing the plug weld filler metal to fully fuse with the outer surface of the base wheel rim and the groove wall of the arc-shaped wear-resistant steel plate, forming an integral fusion structure. The welding bevel increases the effective welding cross-sectional area, ensuring complete fusion between the wear-resistant plate, the filler metal, and the base wheel rim. This not only improves the shear bearing capacity and connection strength but also alleviates stress concentration at right angles, effectively suppressing the initiation of fatigue cracks.

[0010] Furthermore, adjacent arc-shaped wear-resistant steel plates are joined by a beveled lap joint, with the beveled butt joint forming a preset angle with the axial direction of the steel wheel. The beveled full-weld joint is a continuous transition structure with a beveled surface. The beveled lap joint structure increases the weld bearing length for the same plate width and deflects the direction of impact loads away from the weld normal, reducing the risk of weld cracking. The preset angle further optimizes the load transmission path, preventing synchronous wear or collapse of the entire weld, and significantly improving the fatigue and impact resistance of the beveled full-weld joint.

[0011] Furthermore, the wear-resistant steel plate layer comprises 2 to 6 arc-shaped wear-resistant steel plates, each of which is an integral arc-shaped bending structure without segmented splicing welds. Optimizing the wear-resistant steel plate layer into a modular design of 2 to 6 pieces controls the size of each plate for easier bending and precision control, while also reducing the total number of splicing welds. The integral structure eliminates its own welding stress, and severely worn individual plates can be replaced later without the need for complete scrapping, significantly reducing maintenance costs.

[0012] Furthermore, the wear-resistant steel plate layer completely covers the effective compaction surface of the base wheel rim, and the thickness of the arc-shaped wear-resistant steel plate is 8~20mm. This thickness range and full-coverage design ensure that the wear-resistant protective layer can completely resist abrasive wear and impact under harsh working conditions, adapting to the heavy-load compaction requirements of large-tonnage road rollers of 20t and above, maximizing the extension of the steel wheel's service life while ensuring compaction quality.

[0013] A process for assembling and welding wear-resistant steel plate layers for a wear-resistant steel wheel used in a large-tonnage single-drum road roller includes the following steps:

[0014] S1. Prefabrication: The wear-resistant substrate is cut and bent into an arc-shaped wear-resistant steel plate with oblique cuts on the side. Several plug weld grooves that run through the thickness of the plate are processed on the body of each arc-shaped wear-resistant steel plate.

[0015] S2. Fitting and Positioning: Multiple arc-shaped wear-resistant steel plates are sequentially fitted and wrapped around the outer surface of the base wheel rim. The oblique butt joints of adjacent arc-shaped wear-resistant steel plates are aligned and spot-welded for positioning, ensuring that the arc-shaped wear-resistant steel plates are circumferentially fitted without warping and that the gaps between the splicing welds are uniform.

[0016] S3, plug welding composite fixing: fill each plug welding groove with welding material to perform plug welding fusion, so that the arc-shaped wear-resistant steel plate and the outer surface of the base wheel rim form a multi-point three-dimensional fusion structure.

[0017] S4. Full Welding and Sealing: All oblique butt joints are continuously and fully welded to form oblique full welds, which completely seals the splicing gaps of the wear-resistant steel plate layers.

[0018] S5. Grinding and Finishing: The weld seams on the outer circumference of the steel wheel are ground to ensure a smooth and continuous outer surface, completing the assembly and welding of the wear-resistant steel wheel. This process, through standardized prefabrication, positioning, welding, and finishing procedures, ensures the precision of the oblique splicing and the quality of the plug weld, achieving a high-strength composite connection between the wear-resistant steel plate layer and the base wheel rim. It guarantees the flatness and sealing of the finished steel wheel's outer circumference, offering advantages such as process control and stable quality.

[0019] Furthermore, in step S1, after machining the plug weld groove, a welding bevel is machined at the edge of the groove opening; in step S3, during plug welding fusion, the welding material fills the welding bevel, so that the plug weld filler metal is completely fused with the outer surface of the base wheel rim and the groove wall of the arc-shaped wear-resistant steel plate; in step S4, while fully welding the oblique butt joint, the outer peripheral edge of the arc-shaped wear-resistant steel plate is continuously fully welded, so that the edge connection between the arc-shaped wear-resistant steel plate and the base wheel rim is completely sealed. The addition of a bevel to the plug weld groove, combined with the full welding sealing process, further enhances the fusion quality and structural strength of the welded joint, achieving a fully enclosed connection between the wear-resistant layer and the base, effectively preventing the intrusion of external mud and moisture, avoiding interlayer erosion and corrosion from the source, and improving the product's durability.

[0020] A road roller includes a frame and a vibratory wheel mounted on the frame. The vibratory wheel is a wear-resistant steel wheel used in large-tonnage single-drum road rollers. By applying the aforementioned wear-resistant steel wheel, which possesses advantages such as high wear resistance, high fatigue resistance, and maintainability, the reliability and compaction quality of the road roller in harsh working conditions such as water conservancy dams and mines are significantly improved. At the same time, the total life-cycle maintenance cost of the equipment is greatly reduced, enhancing the product's market competitiveness.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] (1) This application adopts a slanted cut splicing structure, which completely solves the industry problem of stress concentration and fatigue cracking in welds. The slanted butt joint ensures that when the roller is compacted and subjected to high-frequency vibration, the huge impact load is no longer perpendicular to the weld direction, but is continuously transmitted and gradually released along the slant, eliminating the stress abrupt peak from the root. At the same time, this structure effectively blocks the straight propagation path of cracks and avoids the risk of whole-line tearing common in straight welds; under the same plate width, the bearing length of the slanted weld is significantly increased. Combined with the slanted transition structure, it greatly improves the shear and tensile bearing capacity and fatigue resistance of the weld, ensuring the long-term stable operation of the steel wheel under extreme working conditions such as rockfill and slag.

[0023] (2) By combining the processes of "plug weld groove composite welding + fully enclosed full welding", this invention achieves a high degree of unity between structural strength and wear resistance. The array-distributed plug weld grooves, combined with the groove bevel design, enable the welding material to form a deep three-dimensional fusion with the wear-resistant plate and the base wheel rim. The bonding area and fusion depth exceed those of traditional spot welding, completely eliminating the phenomenon of wear-resistant layer delamination and peeling under vibration conditions. At the same time, the continuous full welding of the oblique butt joint and the outer peripheral edge forms a fully enclosed structure, effectively preventing sand and mud from invading the interlayer between the wear-resistant plate and the base wheel rim, avoiding internal abrasive wear and corrosion, and ensuring the flatness and compaction quality of the outer circle of the steel wheel.

[0024] (3) The modular design gives the product high economy and maintainability. The wear-resistant layer is divided into 2 to 6 independent arc plates, which not only reduces the difficulty of bending and forming a single piece and welding deformation, but also realizes the operation and maintenance mode of "local wear and local replacement", which does not require the whole wheel to be scrapped due to local damage, unlike the traditional integral steel wheel. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0026] Figure 1 This is a schematic diagram of the overall structure of the wear-resistant steel wheel of the present invention.

[0027] Figure 2 This is a schematic diagram of the internal cross-sectional structure of the wear-resistant steel wheel of the present invention.

[0028] The reference numerals in the attached drawings are as follows: 1. Base wheel rim; 2. Wear-resistant steel plate layer; 3. Weld groove; 4. Oblique full weld; 5. Inner cylinder; 6. Drive-side reinforcement assembly; 7. Vibration-side reinforcement assembly. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. Of course, the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0030] like Figure 1 and Figure 2 As shown, this embodiment provides a wear-resistant steel wheel for a large-tonnage single steel drum road roller. The whole includes a base wheel 1, an inner cylinder 5, a drive-side reinforcing component 6, and a vibration-side reinforcing component 7. The drive-side reinforcing component 6 and the vibration-side reinforcing component 7 are respectively disposed at both ends inside the base wheel 1 and connected to the inner cylinder 5, together forming the main load-bearing body of the steel wheel, ensuring the overall structural rigidity and fatigue resistance under vibration rolling conditions.

[0031] The outer circumference of the base wheel 1 is covered and fixed with a wear-resistant steel plate layer 2. The wear-resistant steel plate layer 2 is formed by splicing at least two arc-shaped wear-resistant steel plates end to end to form a complete cylindrical structure. The inner surfaces of each arc-shaped wear-resistant steel plate are tightly attached to the outer surface of the base wheel 1. The arc-shaped wear-resistant steel plates are made of NM400 or NM450 wear-resistant steel plates, and the base wheel 1 is made of Q355 or Q460 high-strength structural steel. The outer high-hardness wear-resistant steel plate directly bears the friction and impact of the filler, which greatly improves the anti-abrasive wear capability of the working surface. The inner high-strength steel bears the main load-bearing function. The matching of layered materials achieves bidirectional optimization of structural strength and wear resistance. At the same time, the modular plate structure allows for individual replacement after a single plate wears out, eliminating the need to scrap the entire steel wheel and significantly reducing subsequent maintenance costs.

[0032] Each arc-shaped wear-resistant steel plate has several through-thickness plug weld grooves 3. These grooves are either elongated or circular, and are arranged in a uniform matrix array along the circumference and axial direction of the arc-shaped wear-resistant steel plate. Welding bevels are formed at the edges of the grooves 3. The arc-shaped wear-resistant steel plate is fixed to the outer surface of the base wheel 1 through a composite welding method of plug welding inside the grooves 3 and fusion welding on the inner contact surface. The plug weld filler metal is completely fused with the outer surface of the base wheel 1 and the groove wall of the arc-shaped wear-resistant steel plate, forming an integrated fusion structure. The uniformly arrayed plug weld points form a full-area three-dimensional fusion, resulting in a larger fusion area and deeper penetration compared to traditional single-sided welding. This eliminates the possibility of hollowing, delamination, and peeling of the wear-resistant plate under high-frequency vibration conditions. The bevel design increases the effective welding cross-sectional area, improves stress concentration at the right angle of the groove, and further enhances the shear bearing capacity and fatigue resistance of the connection structure.

[0033] The splicing sides of the arc-shaped wear-resistant steel plates have an oblique cut structure. Adjacent arc-shaped wear-resistant steel plates are joined by an oblique cut surface. The oblique joint is at a preset angle to the axis of the steel wheel. The oblique joint is filled with a continuous oblique full weld 4, so that multiple arc-shaped wear-resistant steel plates are enclosed to form a closed wear-resistant outer ring. The oblique weld 4 extends the effective load-bearing length. The rolling impact load is continuously transmitted and gradually released along the oblique surface, eliminating the stress abrupt peak of the traditional straight seam. At the same time, it blocks the straight crack propagation path and avoids the overall tearing failure of the weld. The sealing structure of the continuous full weld 4 can completely seal the splicing gap, preventing sand and mud from invading the interlayer between the wear-resistant plate and the base wheel 1, avoiding internal abrasion and corrosion from the root, while ensuring the continuous smoothness of the outer circle of the steel wheel and improving the accuracy of the compaction operation.

[0034] Furthermore, the wear-resistant steel plate layer 2 comprises 2 to 6 arc-shaped wear-resistant steel plates. Each arc-shaped wear-resistant steel plate is an integral arc-shaped bending structure without segmented splicing welds. The wear-resistant steel plate layer 2 completely covers the effective compaction working surface of the base wheel 1. The thickness of the arc-shaped wear-resistant steel plate is 8 to 20 mm. Controlling the number of segments can reduce the total number of splicing welds 4. The integral bending forming has high precision and small welding deformation. The thickness of 8 to 20 mm provides sufficient wear resistance allowance. The full coverage design can prevent the base wheel 1 from directly contacting the hard filler, making it suitable for heavy-duty compaction applications.

[0035] This embodiment also provides the assembly and welding process for the wear-resistant steel plate layer 2 of the wear-resistant steel wheel, and the specific steps are as follows:

[0036] The first step is prefabrication, in which the wear-resistant substrate is cut and bent into an arc-shaped wear-resistant steel plate with oblique cuts on the side. Several plug welding grooves 3 that run through the thickness of the plate are processed on the plate body of each arc-shaped wear-resistant steel plate, and welding bevels are processed at the edges of the grooves 3.

[0037] The second step is to attach and position multiple arc-shaped wear-resistant steel plates sequentially and attach them to the outer surface of the base wheel 1. Align the oblique butt joints of adjacent arc-shaped wear-resistant steel plates and spot weld them in place to ensure that the arc-shaped wear-resistant steel plates are attached circumferentially without warping and that the gaps between the splicing welds are uniform.

[0038] The third step is plug welding composite fixation. Welding material is filled into each plug welding groove 3 for plug welding fusion. The welding material fills the welding bevel, so that the plug welding filler metal is completely fused with the outer surface of the base wheel 1 and the arc-shaped wear-resistant steel plate groove wall to form a multi-point three-dimensional fusion structure.

[0039] The fourth step is full welding and sealing. All oblique butt joints are continuously fully welded to form oblique full weld 4. At the same time, the outer periphery of the arc-shaped wear-resistant steel plate is continuously fully welded to completely seal the edge connection between the arc-shaped wear-resistant steel plate and the base wheel 1.

[0040] The fifth step is grinding and finishing. The weld seams at four locations on the outer circumference of the steel wheel are ground to ensure a smooth and continuous outer surface, completing the assembly and welding of the wear-resistant steel wheel. The entire process is highly standardized, with stable and controllable forming quality, enabling mass industrial production.

[0041] In summary, this invention utilizes a comprehensive set of technical means—including oblique full-weld seams 4 for load distribution, plug weld grooves 3 for composite reinforcement, and wear-resistant steel plate layers 2 for full-enclosure protection—to construct a steel wheel solution that is highly wear-resistant, crack-resistant, and easy to maintain. It is particularly suitable for the operational needs of large-tonnage single steel drum road rollers (20 tons and above) in extreme and harsh conditions such as those encountered in water conservancy dams and mining operations.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wear-resistant steel wheel for a large-tonnage single-drum road roller, characterized in that, The assembly includes a base wheel rim (1), an inner cylinder (5), a drive-side reinforcing component (6), and a vibration-side reinforcing component (7). The drive-side reinforcing component (6) and the vibration-side reinforcing component (7) are respectively disposed at both ends inside the base wheel rim (1) and connected to the inner cylinder (5). The outer circumference of the base wheel rim (1) is covered and fixed with a wear-resistant steel plate layer (2). The wear-resistant steel plate layer (2) is formed by splicing at least two arc-shaped wear-resistant steel plates end to end to form a complete cylindrical structure. The inner surface of each arc-shaped wear-resistant steel plate is attached to the base wheel rim (1). The outer surface of each arc-shaped wear-resistant steel plate is provided with several through-thickness plug weld grooves (3). The arc-shaped wear-resistant steel plate is fixed to the outer surface of the base wheel rim (1) by a composite welding method of plug welding inside the plug weld groove (3) and fusion welding of the inner side contact surface. The splicing side of the arc-shaped wear-resistant steel plate is a slanted cut structure. The sides of two adjacent arc-shaped wear-resistant steel plates are joined to form a slanted butt joint. The slanted butt joint is filled with a continuous slanted full weld (4), so that multiple arc-shaped wear-resistant steel plates are surrounded to form a closed wear-resistant outer ring.

2. The wear-resistant steel wheel for a large-tonnage single-drum road roller according to claim 1, characterized in that, The arc-shaped wear-resistant steel plate is made of NM400 or NM450 wear-resistant steel plate, and the base wheel rim (1) is made of Q355 or Q460 high-strength structural steel.

3. The wear-resistant steel wheel for a large-tonnage single-drum road roller according to claim 1, characterized in that, The plug welding groove (3) is a long, waist-shaped groove or a circular groove, and several of the plug welding grooves (3) are arranged in a matrix uniform array along the circumference and axial direction of the arc-shaped wear-resistant steel plate.

4. The wear-resistant steel wheel for a large-tonnage single-drum road roller according to claim 3, characterized in that, The edge of the plug weld groove (3) is provided with a welding bevel. The plug weld filler metal is completely fused with the outer surface of the base wheel rim (1) and the arc-shaped wear-resistant steel plate groove wall to form an integrated fusion structure.

5. The wear-resistant steel wheel for a large-tonnage single-drum road roller according to claim 1, characterized in that, The two adjacent arc-shaped wear-resistant steel plates are joined by a beveled surface, and the beveled joint is at a preset angle to the axis of the steel wheel. The beveled full weld (4) is a continuous transition structure with a beveled surface.

6. The wear-resistant steel wheel for a large-tonnage single-drum road roller according to claim 1, characterized in that, The wear-resistant steel plate layer (2) includes 2 to 6 arc-shaped wear-resistant steel plates. Each arc-shaped wear-resistant steel plate is an integral arc-shaped bending structure without segmented splicing welds.

7. The wear-resistant steel wheel for a large-tonnage single-drum road roller according to claim 1, characterized in that, The wear-resistant steel plate layer (2) completely covers the effective compaction surface of the base wheel rim (1), and the thickness of the arc-shaped wear-resistant steel plate is 8~20mm.

8. A process for assembling and welding the wear-resistant steel plate layer of a wear-resistant steel wheel for a large-tonnage single-drum road roller as described in any one of claims 1-7, characterized in that, Includes the following steps: S1. Prefabrication: Cut and bend the wear-resistant substrate into an arc-shaped wear-resistant steel plate with oblique cuts on the side. Process several plug weld grooves that penetrate the thickness of the plate on the plate body of each arc-shaped wear-resistant steel plate (3). S2, Fitting and Positioning: Multiple arc-shaped wear-resistant steel plates are sequentially fitted and wrapped around the outer surface of the base wheel rim (1), and the oblique butt joint gaps of adjacent arc-shaped wear-resistant steel plates are aligned and spot welded for positioning to ensure that the arc-shaped wear-resistant steel plates are circumferentially fitted without warping and that the gaps of the splicing welds are uniform. S3, plug welding composite fixing: fill each plug welding groove (3) with welding material to perform plug welding fusion, so that the arc-shaped wear-resistant steel plate and the outer surface of the base wheel rim (1) form a multi-point three-dimensional fusion structure; S4. Full welding and sealing: All oblique butt joints are continuously fully welded to form oblique full welds (4), which completely seals the splicing gaps of the wear-resistant steel plate layer (2). S5. Grinding and finishing: Grind the weld seam on the outer circle of the steel wheel to make the outer circle surface of the steel wheel continuous and flat, and complete the assembly and welding of the wear-resistant steel wheel.

9. The wear-resistant steel plate layer assembly and welding process according to claim 8, characterized in that, In step S1, after machining the plug weld groove (3), a welding bevel is machined at the edge of the groove of the plug weld groove (3); In step S3, during plug welding fusion, the welding material fills the welding groove, so that the plug welding filler metal is completely fused with the outer surface of the base wheel rim (1) and the arc-shaped wear-resistant steel plate groove wall; In step S4, while fully welding the oblique butt joint, the outer periphery of the arc-shaped wear-resistant steel plate is continuously fully welded to completely seal the edge connection between the arc-shaped wear-resistant steel plate and the base wheel rim (1).

10. A road roller, comprising a frame and a vibratory wheel mounted on the frame, characterized in that, The vibratory wheel is a wear-resistant steel wheel for a large-tonnage single-drum road roller as described in any one of claims 1 to 7.

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