Processing method of lightweight agricultural machinery rim

Abstract

The present invention proposes a processing method for a lightweight agricultural machinery rim, which relates to the technical field of wheel processing. The lightweight agricultural machinery rim comprises a cylindrical body and two steel rim bodies. The steel is firstly subjected to a thickening and weight reduction treatment by rolling, and then the rolled steel is subjected to the steps of rolling, flattening, butt welding, slag planing and expansion in sequence. The cylindrical body is processed by a steel plate through the steps of rolling, butt welding, slag planing and expansion in sequence, and finally the two end faces of the cylindrical body are respectively welded to the inner end faces of the two steel rim bodies into one. The present invention reduces the weight of the steel at a non-critical stress position by rolling the steel, so that the steel at the critical stress position is equivalent to being thickened, and the thinning of the thickness of the steel at the critical stress position is avoided, so that there is a large thickness difference between the steel at the critical stress position and the steel at the non-critical stress position, thereby achieving lightweight of the rim without changing the bearing capacity.

Description

Technical Field

[0001] The invention relates to the technical field of wheel processing, and in particular to a method for processing a lightweight agricultural machinery rim. Background Art

[0002] Wheel lightweighting has become a development trend for industrial vehicles, which can reduce fuel consumption, emissions and improve transportation efficiency.

[0003] During the use of the rim, the arc position of the rim is the key stress position, which is subjected to greater force and is prone to fatigue damage. The existing agricultural machinery rims are mostly formed by rolling machines to form the plate, and the processed rim cross-section is of uniform thickness, which is a waste of material at non-critical stress positions. Some agricultural machinery rims are formed by spinning. Although this method can thin the material at non-critical stress positions, this method has certain limitations on the thickness of the material, and in the process of spinning the arc, the force at the arc position of the rim is uneven, causing a certain amount of thinning of the material at the arc position. This not only reduces the thickness difference between the material at the key stress position and the non-critical stress position, making the overall rim weight loss smaller, but also reduces the bearing capacity at the arc position, and it is impossible to achieve lightweighting of the rim while keeping the bearing capacity unchanged.

[0004] Therefore, a method for processing a lightweight agricultural machinery rim that solves the above-mentioned problems is needed. Summary of the invention

[0005] The present invention proposes a method for processing a lightweight agricultural machinery rim. By rolling steel sections, the steel sections at non-critical stress positions are lightened, so that the steel sections at critical stress positions are equivalent to being thickened. The thinning of the thickness of the steel sections at critical stress positions is avoided by expansion and shaping, so that there is a large thickness difference between the steel sections at critical stress positions and the steel sections at non-critical stress positions. Therefore, the weight of the rim is reduced without changing the bearing capacity, thereby achieving lightweighting of the rim.

[0006] The technical solution of the present invention is achieved in this way:

[0007] A method for processing a lightweight agricultural machinery wheel rim, wherein the lightweight agricultural machinery wheel rim comprises a cylindrical body, and a steel wheel rim body is respectively arranged on both sides of the cylindrical body;

[0008] Also includes processing methods:

[0009] S1. The processing technology of the steel rim body includes: firstly, the steel is thickened and reduced in weight by rolling to obtain a stress concentration area, a first stress area, a second stress area, a non-stress concentration area and a weight reduction area, the wall thickness of the steel in the first stress area and the second stress area is the same, the wall thickness of the steel in the stress concentration area is greater than the wall thickness of the steel in the first stress area and the second stress area, the wall thickness of the steel in the first stress area and the second stress area is greater than the wall thickness of the steel in the non-stress concentration area, and the wall thickness of the steel in the non-stress concentration area is greater than the wall thickness of the steel in the weight reduction area; and then the rolled steel is subjected to the steps of rolling, flattening, butt welding, slag planing and expansion in sequence;

[0010] S2. The wall thickness of the cylinder is smaller than the wall thickness of the steel section in the non-stress concentration area, and the cylinder is made of steel plates through the processes of rolling, butt welding, slag planing and expansion in sequence;

[0011] S3. Welding the two end surfaces of the cylindrical body to the inner end surfaces of the two steel wheel rim bodies respectively.

[0012] As a preferred technical solution, the steel wheel rim body includes, from the inside to the outside, a welding transition ring, a rounded rolled thickening ring, a first transition side ring, a first rounded transition ring, a spoke mounting ring, a second rounded transition ring, a second transition side ring and an outer rim, and the end face of the welding transition ring is welded to the end face of the cylinder.

[0013] As a preferred technical solution, the stress concentration zone includes the rounded rolled thickening ring, the first stress zone includes the first rounded transition ring, the second stress zone includes the second rounded transition ring, the non-stress concentration zone includes the spoke mounting ring and the outer rim, and the weight reduction zone includes the first transition side ring and the second transition side ring.

[0014] As a preferred technical solution, the rolled steel section is subjected to the following steps: rolling, flattening, butt welding, slag planing and expansion, which specifically include the following steps:

[0015] S101, performing a rounding process on the rolled steel section;

[0016] S102, flattening the two ends of the steel section to be butted after being rounded, so that both ends of the steel section to be butted form a butt-butted flattened section;

[0017] S103, aligning the two butt-welded flattened sections, and then performing butt welding;

[0018] S104, performing slag removal treatment on the weld;

[0019] S105, performing rounding treatment on the welded steel section;

[0020] S106. Expand and shape the steel section after re-rounding to obtain the steel section wheel rim body. During the expansion and shaping process, the welding transition ring is bent outward to form the rounded rolled thickening ring, the first transition side ring is bent inward to form the first rounded transition ring, the spoke mounting ring is bent outward to form the second rounded transition ring, and the second transition side ring is bent inward to form the outer wheel rim.

[0021] As a preferred technical solution, the cylindrical body is processed by rolling, butt welding, slag planing and expansion processes in sequence, which specifically includes the following steps:

[0022] S201, performing a rounding process on the steel plates of equal thickness;

[0023] S202, butt welding the rounded steel plates;

[0024] S203, performing slag removal treatment on the weld;

[0025] S204, expanding and shaping the steel plate after butt welding to obtain the cylindrical body.

[0026] As a preferred technical solution, the outer contour dimensions of the lightweight agricultural machinery rim include:

[0027] The rim calibration width A is 152.5-1117.5 mm, the rim width B is 10-154.7 mm, the rim height G is 22.5-29 mm, the rim calibration diameter D is 100.8-1325.6 mm, the bead seat width P is 23.5-50.5 mm, the groove position dimension M is 44.5-95.5 mm, the outer diameter r1 of the second fillet transition ring is greater than or equal to 8 mm, the outer diameter r2 of the first fillet transition ring is less than or equal to 12 mm, and the outer diameter r3 of the fillet rolled thickening ring is greater than or equal to 11 mm;

[0028] The thickness dimensions of the lightweight agricultural machinery rim include:

[0029] The thickness of the cylinder is H1 = 3-7 mm, the thickness of the spoke mounting ring is H2 = H1-(1-3 mm), and the thickness of the second transition side ring is H3 = H1-(1-2 mm);

[0030] The inner contour dimensions of the lightweight agricultural machinery rim include:

[0031] The inner diameter R1 of the second rounded corner transition ring is 1 mm to 4 mm, the inner diameter R2 of the first rounded corner transition ring is r2+3 mm, and the inner diameter R3 of the rounded corner rolled thickening ring is 1 mm to 4 mm.

[0032] By adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0033] Since the processing method of the lightweight agricultural machinery rim includes a cylindrical body and a steel rim body, compared with the existing rim processing method, the medium-sized steel rim of the present invention is rolled from steel, and during the rolling process, the thickness of the steel of the spoke mounting ring, the outer rim, the first transition side ring, and the second transition side ring is thinned, thereby achieving the purpose of reducing the weight of the steel rim body. With the thinning of the above positions, in contrast, the thickness of the steel at the rounded corner rolling thickening ring, the first rounded corner transition ring, and the second rounded corner transition ring is relatively thickened, thereby achieving the purpose of thickening the steel thickness at the key stress position, thereby improving the fatigue damage resistance of the rounded corner rolling thickening ring, the first rounded corner transition ring, and the second rounded corner transition ring, and improving the service life and safety of the rim.

[0034] During the use of the rim, different positions are subjected to different stresses. In the present invention, the material thickness of the stress concentration area is the thickest, followed by the material thickness of the first stress area and the second stress area, the material thickness of the non-stress concentration area, and then the material thickness of the cylinder. The material thickness of the weight reduction area is the thinnest. According to the different stresses in different areas of the rim, the material thickness of the five areas is reduced, so that there is a large thickness difference between the material at the critical stress point and the material at the non-critical stress point. Without changing the bearing capacity, the weight of the rim is reduced, thereby achieving lightweighting of the rim.

[0035] When the steel wheel rim body is expanded and shaped, the force on the steel wheel rim body is uniform, and the thickness of the material is basically not changed. During the spinning process, the force on the material is uneven, which causes a certain thinning of the profile at the key stress point. At the same time, the spinning processing method has restrictions on the thickness of the material. The strong spinning thickness limit of the stainless steel plate is 4mm, the strong spinning thickness limit of the aluminum plate is 6mm, and the strong spinning thickness limit of the iron plate is 5mm. In the present invention, the steel wheel rim body is rolled from the steel, which has a greatly improved processing thickness compared with the spinning process, and can effectively increase the thickness of the steel at the key stress point of the rim and improve the bearing capacity of the rim.

[0036] After flattening the butt joint of the steel section, the butt joint position can be better aligned, avoiding the weld difference between the two butt joint flattened sections, reducing the stress at the butt joint position, avoiding cracking at the later welding position, and improving the welding effect.

[0037] Common parameters of the rim include the rim calibration width and the rim standard diameter. In the traditional rim processing process, if one of the parameters of the rim changes, the tooling molds on the entire production line must be replaced. Since the cylindrical body and the steel rim bodies at both ends are welded in the present invention, during the processing of the lightweight agricultural machinery rim in the present invention, when the rim standard diameter remains unchanged and the rim calibration width changes, the requirements of various rim calibration widths can be achieved by adjusting the length of the cylindrical body without replacing the tooling mold. When the rim standard diameter changes and the rim calibration width remains unchanged, it is only necessary to replace the expansion mold corresponding to the rim standard diameter. Therefore, the processing method of the lightweight agricultural machinery rim in the present invention has strong versatility and interchangeability, and is suitable for the processing of rims of various sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0039] Figure 1 It is a schematic diagram of the structure of the lightweight agricultural machinery rim in the present invention;

[0040] Figure 2 This is the process flow chart of the steel rim body;

[0041] Figure 3 The process flow chart for the cylinder;

[0042] Figure 4 is a process flow chart of the wheel rim in the present invention;

[0043] Figure 5 This is a schematic diagram of the dimensions of the lightweight agricultural machinery rim.

[0044] Among them: 1. Lightweight agricultural machinery rim; 2. Cylinder; 3. Steel rim body; 4. Valve hole; 5. Welding transition ring; 6. Rounded rolled thickening ring; 7. First transition side ring; 8. First rounded transition ring; 9. Spoke installation ring; 10. Second rounded transition ring; 11. Second transition side ring; 12. Outer rim; 13. Butt-jointed flattening section. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] like Figure 1-Figure 5 As shown together, a method for processing a lightweight agricultural machinery rim is provided. The lightweight agricultural machinery rim 1 comprises a cylindrical body 2, and a steel wheel rim body 3 is provided on both sides of the cylindrical body 2.

[0047] Also includes processing methods:

[0048] The processing technology of S1 and the steel rim body 3 includes: firstly, the steel is thickened and reduced in weight by rolling to obtain a stress concentration area, a first stress area, a second stress area, a non-stress concentration area and a weight reduction area, the wall thickness of the steel in the first stress area and the second stress area is the same, the wall thickness of the steel in the stress concentration area is greater than the wall thickness of the steel in the first stress area and the second stress area, the wall thickness of the steel in the first stress area and the second stress area is greater than the wall thickness of the steel in the non-stress concentration area, and the wall thickness of the steel in the non-stress concentration area is greater than the wall thickness of the steel in the weight reduction area. Then, the rolled steel is subjected to the steps of rolling, flattening, butt welding, slag planing and expansion in sequence.

[0049] S2. The wall thickness of the cylinder 2 is smaller than the wall thickness of the steel section in the non-stress concentration area. The cylinder 2 is made of steel plates through the processes of rolling, butt welding, slag planing and expansion.

[0050] S3. Weld the two end surfaces of the cylindrical body 2 to the inner end surfaces of the two steel rim bodies 3 respectively.

[0051] S4. Processing valve hole 4.

[0052] Among them, the steel rim body 3 includes a welding transition ring 5, a rounded rolled thickening ring 6, a first transition side ring 7, a first rounded transition ring 8, a spoke mounting ring 9, a second rounded transition ring 10, a second transition side ring 11 and an outer rim 12 from the inside to the outside, and the end face of the welding transition ring 5 is welded to the end face of the cylindrical body 2.

[0053] In addition, the stress concentration zone includes a rounded rolled thickening ring 6, the first stress zone includes a first rounded transition ring 8, the second stress zone includes a second rounded transition ring 10, the non-stress concentration zone includes a spoke mounting ring 9 and an outer wheel rim 12, and the weight reduction zone includes a first transition side ring 7 and a second transition side ring 11.

[0054] like Figure 2 As shown in the figure, the rolled steel is subjected to the following processes: rolling, flattening, butt welding, slag planing and expansion, which are as follows:

[0055] S101, performing a rounding process on the rolled steel section.

[0056] S102, flattening the two ends of the rounded steel sections to be butted, so that a butt-jointed flattening section 13 is formed at both ends of the rounded steel sections to be butt-jointed.

[0057] S103, aligning the two butt-welded flattened sections 13, and then performing butt welding.

[0058] S104, slag removal is performed on the weld.

[0059] S105, re-rounding the welded steel section.

[0060] S106. Expand and shape the steel section after re-rounding to obtain the steel section wheel rim body 3. During the expansion and shaping process, the welding transition circle 5 is bent outward to form a rounded rolled thickening circle 6, the first transition side circle 7 is bent inward to form a first rounded transition circle 8, the spoke installation circle 9 is bent outward to form a second rounded transition circle 10, and the second transition side circle 11 is bent inward to form an outer wheel rim 12.

[0061] like Figure 3 As shown, the cylindrical body 2 is processed by rolling, butt welding, slag planing and expansion processes in sequence, which specifically includes the following steps:

[0062] S201, performing a rounding process on steel plates of equal thickness.

[0063] S202, butt-welding the rounded steel plates.

[0064] S203, slag removal is performed on the weld.

[0065] S204, expanding and shaping the welded steel plate to obtain a cylindrical body 2.

[0066] like Figure 5 As shown, the outer contour dimensions of the lightweight agricultural machinery rim 1 include:

[0067] The rim calibration width A is 152.5~1117.5mm, the rim width B is 10~154.7mm, the rim height G is 22.5~29mm, the rim calibration diameter D is 100.8~1325.6mm, the bead seat width P is 23.5~50.5mm, the groove position dimension M is 44.5~95.5mm, the outer diameter r1 of the second fillet transition ring 10 is greater than or equal to 8mm, the outer diameter r2 of the first fillet transition ring 8 is less than or equal to 12mm, and the outer diameter r3 of the fillet rolled thickening ring 6 is greater than or equal to 11mm.

[0068] The thickness dimensions of the lightweight agricultural machinery rim 1 include:

[0069] The thickness H1 of the cylindrical body 2 is 3 to 7 mm, the thickness H2 of the spoke mounting ring 9 is H1-(1 to 3 mm), and the thickness H3 of the second transition side ring 11 is H1-(1 to 2 mm).

[0070] The inner profile dimensions of the lightweight agricultural machinery rim 1 include:

[0071] The inner diameter R1 of the second rounded transition ring 10 is 1 mm to 4 mm, the inner diameter R2 of the first rounded transition ring 8 is r2+3 mm, and the inner diameter R3 of the rounded rolled thickening ring 6 is 1 mm to 4 mm.

[0072] In summary, the present invention reduces the weight of steel sections at non-critical stress positions by rolling steel sections, so that the steel sections at critical stress positions are equivalent to being thickened. The thinning of the thickness of the steel sections at critical stress positions is avoided by expansion and shaping, so that there is a large thickness difference between the steel sections at critical stress positions and the steel sections at non-critical stress positions, thereby reducing the weight of the rim without changing the bearing capacity, thereby achieving lightweighting of the rim.

[0073] 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 principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for processing a lightweight agricultural machinery rim, characterized in that: The lightweight agricultural machinery wheel rim comprises a cylindrical body, and a steel wheel rim body is respectively arranged on both sides of the cylindrical body; the steel wheel rim body comprises a welding transition ring, a rounded corner rolling thickening ring, a first transition side ring, a first rounded corner transition ring, a spoke installation ring, a second rounded corner transition ring, a second transition side ring and an outer wheel rim in sequence from the inside to the outside, and the end face of the welding transition ring is welded to the end face of the cylindrical body; Also includes processing methods: S1. The processing technology of the steel rim body includes: firstly, the steel is thickened and reduced in weight by rolling to obtain a stress concentration area, a first stress area, a second stress area, a non-stress concentration area and a weight reduction area. The wall thickness of the steel in the first stress area and the second stress area is the same, the wall thickness of the steel in the stress concentration area is greater than the wall thickness of the steel in the first stress area and the second stress area, the wall thickness of the steel in the first stress area and the second stress area is greater than the wall thickness of the steel in the non-stress concentration area, and the wall thickness of the steel in the non-stress concentration area is greater than the wall thickness of the steel in the weight reduction area; then, the rolled steel is subjected to the steps of rolling, flattening, butt welding, slag planing and expansion in sequence; the stress concentration area includes the fillet rolling thickening ring, the first stress area includes the first fillet transition ring, the second stress area includes the second fillet transition ring, the non-stress concentration area includes the spoke mounting ring and the outer rim, and the weight reduction area includes the first transition side ring and the second transition side ring; S2. The wall thickness of the cylinder is smaller than the wall thickness of the steel section in the non-stress concentration area, and the cylinder is made of steel plates through the processes of rolling, butt welding, slag planing and expansion in sequence; S3, welding the two end surfaces of the cylindrical body to the inner end surfaces of the two steel wheel rim bodies respectively; The rolled steel is subjected to the following steps: rolling, flattening, butt welding, slag planing and expansion. S101, performing a rounding process on the rolled steel section; S102, flattening the two ends of the steel section to be butted after being rounded, so that both ends of the steel section to be butted form a butt-butted flattened section; S103, aligning the two butt-welded flattened sections, and then performing butt welding; S104, performing slag removal treatment on the weld; S105, performing rounding treatment on the welded steel section; S106, expanding and shaping the re-rounded steel section to obtain the steel section wheel rim body, during which the welding transition ring is bent outward to form the rounded rolled thickening ring, the first transition side ring is bent inward to form the first rounded transition ring, the spoke mounting ring is bent outward to form the second rounded transition ring, and the second transition side ring is bent inward to form the outer wheel rim; The cylindrical body is processed by rolling, butt welding, slag planing and expansion processes in sequence, which specifically includes the following steps: S201, performing a rounding process on the steel plates of equal thickness; S202, butt welding the rounded steel plates; S203, performing slag removal treatment on the weld; S204, expanding and shaping the steel plate after butt welding to obtain the cylindrical body; The outer contour dimensions of the lightweight agricultural machinery rim include: The rim calibration width A is 152.5-1117.5 mm, the rim width B is 10-154.7 mm, the rim height G is 22.5-29 mm, the rim calibration diameter D is 100.8-1325.6 mm, the bead seat width P is 23.5-50.5 mm, the groove position dimension M is 44.5-95.5 mm, the outer diameter r1 of the second fillet transition ring is greater than or equal to 8 mm, the outer diameter r2 of the first fillet transition ring is less than or equal to 12 mm, and the outer diameter r3 of the fillet rolled thickening ring is greater than or equal to 11 mm; The thickness dimensions of the lightweight agricultural machinery rim include: The thickness of the cylinder is H1 = 3-7 mm, the thickness of the spoke mounting ring is H2 = H1-(1-3 mm), and the thickness of the second transition side ring is H3 = H1-(1-2 mm); The inner contour dimensions of the lightweight agricultural machinery rim include: The inner diameter R1 of the second rounded transition ring is 1 mm to 4 mm, the inner diameter R2 of the first rounded transition ring is r2+3 mm, and the inner diameter R3 of the rounded rolled thickening ring is 1 mm to 4 mm.

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