阅读说明：本技术 一种车轮轮辋及其加工工艺 (Wheel rim and processing technology thereof ) 是由 孙福成 韩晓芳 王科见 余海洋 于 2021-08-10 设计创作，主要内容包括：本发明涉及车轮制造领域,具体涉及一种车轮轮辋及其加工工艺。该车轮轮辋的轮缘为C型结构,将车轮轮缘设置为C型结构,不仅大幅增强了车轮轮缘径向刚度和轴向强度,使车轮更耐冲击,还能够有效防止脱胎,并且杜绝了车轮装胎过程中轮缘割胎的风险。该车轮轮辋通过以下步骤制备得到：S1,对下料毛坯卷圆压平后对焊焊接；S2,对焊缝进行处理得到筒形工件；S3,对筒形工件进行扩口处理得到扩口工件；S4,对扩口工件滚压成型后进行扩张精整；S5,将扩张精整后的工序件外缘外侧部位挤压成型；S6,气密性检测和冲挤气门孔。该制造工艺简单、制备得到的产品质量稳定,能够减少设备投入、动能消耗且能够解决轮缘外侧部位无法通过滚压成型的问题。(The invention relates to the field of wheel manufacturing, in particular to a wheel rim and a processing technology thereof. The wheel rim of the wheel rim is of a C-shaped structure, the wheel rim is set to be of a C-shaped structure, the radial rigidity and the axial strength of the wheel rim are greatly enhanced, the wheel is more impact-resistant, the tire can be effectively prevented from being separated, and the risk that the tire is cut by the wheel rim in the tire mounting process is avoided. The wheel rim is prepared by the following steps: s1, rolling and flattening the blanking blank, and then welding in a butt welding way; s2, processing the welding seam to obtain a cylindrical workpiece; s3, performing flaring processing on the cylindrical workpiece to obtain a flaring workpiece; s4, performing expansion finishing on the flaring workpiece after rolling forming; s5, extruding and forming the outer side part of the outer edge of the expanded and finished working procedure piece; and S6, detecting air tightness and punching and extruding the valve hole. The manufacturing process is simple, the quality of the prepared product is stable, the equipment investment and the kinetic energy consumption can be reduced, and the problem that the outer side part of the wheel rim cannot be formed by rolling can be solved.)

1. A wheel rim, characterized in that the wheel rim's flanges (1-3) are of C-shaped construction.

2. The wheel rim as claimed in claim 1, characterized in that it comprises an integral connection of a rim mid-section (1-1), a rim bead seat (1-2) and a rim flange (1-3).

3. The wheel rim as claimed in claim 2, characterized in that the rim centre part comprises a well (1-1-1) and a rim straight edge (1-1-2).

4. The wheel rim according to claim 2 or 3, characterized in that the rim mid-portion (1-1) and the rim bead seat (1-2) both comply with the wheel rim industry standard GB/T31961.

5. A process for manufacturing a wheel rim according to any one of claims 1 to 4, comprising the steps of:

s1, rolling and flattening the blanking blank, and then welding in a butt welding way;

s2, processing the welding seam to obtain a cylindrical workpiece;

s3, performing flaring processing on the cylindrical workpiece to obtain a flaring workpiece;

s4, performing expansion finishing on the flaring workpiece after rolling forming;

s5, extruding and forming the outer side part of the outer edge of the expanded and finished working procedure piece;

and S6, detecting air tightness and punching and extruding the valve hole.

6. The process for manufacturing a wheel rim according to claim 5, wherein the blank in step S1 is a strip-shaped plate, and the two open ends of the workpiece after being rolled and flattened are straight sections.

7. The process for manufacturing a wheel rim according to claim 5, wherein the butt welding in step S1 includes aligning the two open ends, spot-welding 1-2 points to connect them together, and then welding them into a cylindrical shape.

8. The process for manufacturing a wheel rim according to claim 5, wherein the bead processing in step S2 includes: slag planing, welding seam rolling, front and rear end cutting and end burr polishing.

9. The processing technology of the wheel rim according to claim 5, characterized in that the flaring workpiece is subjected to two-time roll forming treatment in step S4, when the first roll forming is carried out, the rim groove is firstly deformed, then the bead seat and the straight section connecting the bead seat and the rim groove are deformed until the product section requirements are met except that the rim groove, the wheel flange part and the circular arc connected with the bead seat are not formed to the final product requirements; when the second rolling forming is carried out, the wheel rim groove is deformed, then the wheel rim is deformed until the outer side part of the wheel rim does not meet the requirement of the product on the shape cutting, and the other parts of the wheel rim all meet the requirement of the product on the shape cutting.

10. The process for manufacturing a wheel rim according to claim 5, wherein the outer peripheral portion of the step member is press-molded by a die in step S5.

Technical Field

The invention relates to the field of wheel manufacturing, in particular to a wheel rim and a processing technology thereof.

Background

In recent years, the development of lightweight wheels, particularly high-strength lightweight steel wheels, is great, for example 22.5X9.00 tubeless steel wheels, the thickness of a rim material is reduced from 7mm to 4-5 mm, the tensile strength of the rim material is improved from 380MPa to 650MPa, the weight of the wheel is reduced from more than 40kg to about 30kg, and in the process, the rim rigidity of the rim is also sharply reduced, which is an important index affecting the safety of the wheel.

Currently, the following methods are mainly used for reinforcing the wheel rim: (1) increasing the rim width or height; (2) the wheel rim is designed into an annular structure; (3) the rim is provided with an annular reinforcing steel wire. The first method has the rim exceeding the industry standard and the reinforcing effect is not obvious enough; the second ring structure method has processing difficulty in process; the third method for reinforcing the steel wire needs to add a process on the basis of the existing process, and meanwhile, the weight of the wheel is increased, and the cost is increased.

Therefore, how to develop a wheel rim which can meet the requirement of light weight of the wheel and is convenient to produce has important significance.

Disclosure of Invention

In view of the above, one of the objects of the present invention is to provide a wheel rim, which is different in that a rim of the wheel rim has a C-shaped structure.

Set up the wheel rim into C type structure, not only strengthened wheel rim radial rigidity and axial strength by a wide margin, made the wheel more shock-resistant, can also effectively prevent to take off the child to the risk of the child is cut to the rim of wheel dress child in-process has been stopped.

In one embodiment of the invention, the wheel rim includes an integrally connected rim center, rim bead seat and rim flange.

In one embodiment of the invention, the mid-rim portion comprises a well and a rim straight edge.

In one embodiment of the invention, the rim center and the rim bead seat both conform to the wheel rim industry standard GB/T31961.

The invention also aims to provide a processing technology of the wheel rim, which comprises the following steps:

s1, rolling and flattening the blanking blank, and then welding in a butt welding way;

s2, processing the welding seam to obtain a cylindrical workpiece;

s3, performing flaring processing on the cylindrical workpiece to obtain a flaring workpiece;

s4, performing expansion finishing on the flaring workpiece after rolling forming;

s5, extruding and forming the outer side part of the outer edge of the expanded and finished working procedure piece;

and S6, detecting air tightness and punching and extruding the valve hole.

In step S1, the blank is a strip-shaped plate, and two open ends of the workpiece after being rolled and flattened are straight sections.

Preferably, the butt welding process in step S1 includes aligning the two open ends, spot-welding 1-2 points to connect them together, and then welding them into a cylindrical shape.

Wherein, the weld processing in step S2 includes: slag planing, welding seam rolling, front and rear end cutting and end burr polishing.

The flaring workpiece is subjected to two-time rolling forming treatment in the step S4, when the first rolling forming is carried out, the rim groove part is deformed, then the bead seat and the straight section connecting the bead seat and the rim groove are deformed until the requirements of the final product are met except that the rim groove part, the wheel flange part and the circular arc connected with the bead seat are not formed, and the other parts meet the requirements of product section; when the second rolling forming is carried out, the wheel rim groove is deformed, then the wheel rim is deformed until the outer side part of the wheel rim does not meet the requirement of the product on the shape cutting, and the other parts of the wheel rim all meet the requirement of the product on the shape cutting.

In step S5, the outer edge of the work piece is formed by die pressing.

The wheel rim processing technology provided by the invention has the advantages that the manufacturing process is simple, the quality of the prepared product is stable, the equipment investment and the kinetic energy consumption can be reduced, and the problem that the outer side part of the wheel rim cannot be formed by rolling can be solved.

Drawings

FIG. 1 is a schematic view of the structure of a C-type bead wheel rim as described in example 1;

FIG. 2 is a drawing showing a flattening process of a roll in example 2;

FIG. 3 is a schematic view showing a process of aligning both open ends and spot-welding in example 2;

FIG. 4 is a view showing a flaring process in accordance with example 2;

FIG. 5 is a process diagram of the first rolling in example 2;

FIG. 6 is a process diagram of the second rolling in example 2;

FIG. 7 is a schematic view showing a process of extruding a rim in example 2.

In the figure, the middle part of a rim 1-1, a bead seat of the rim 1-2, a rim flange 1-3, a rim groove 1-1-1 and a rim straight edge 1-1-2 are shown.

Detailed Description

The present invention is further described in detail below with reference to specific examples so that those skilled in the art can more clearly understand the present invention.

The following examples are provided only for illustrating the present invention and are not intended to limit the scope of the present invention. All other embodiments obtained by a person skilled in the art based on the specific embodiments of the present invention without any inventive step are within the scope of the present invention.

Example 1

This example provides a C-type rim for a wheel having a 15 ° drop center diameter of 22.5X9.00 gauge and a cross-section thickness of 4 mm.

As shown in figure 1, the wheel rim of the C-shaped wheel rim is provided with a C-shaped flange part, namely, the wheel rim flange 1-3 of the wheel rim is of a hook-segment arc structure, and the wheel rim of the C-shaped wheel rim comprises a rim middle part 1-1, a rim bead seat 1-2 and a rim flange 1-3 which are integrally connected.

The middle part 1-1 of the rim comprises a rim groove 1-1-1 and a rim straight edge 1-1-2, and specifically comprises a rim flange, a rim bead seat, a rim groove, a rim straight edge, a rim bead seat and a rim flange which are sequentially connected into a whole. The middle part 1-1 of the rim and the bead seats 1-3 of the rim both accord with the industrial standard GB/T31961 of the wheel rim.

This wheel rim has stopped the risk that the wheel dress child in-process rim easily lacerated tire through setting up the rim into colluding the section circular arc (also C type), and in addition, this structure has still strengthened wheel rim radial stiffness and axial strength by a wide margin, and is shock-resistant, has the child effect of protecting, has stopped the risk that whole car travel in-process tire deviates from the rim.

Example 2

The embodiment provides a process for producing the wheel rim of embodiment 1, the rim is made of high-strength special steel for wheels with the thickness of 4mm and the tensile strength of more than 650MPa, and the process specifically comprises the following steps:

s1, performing butt welding on the blanked blank after rounding and flattening, wherein the blanked blank is a strip-shaped plate in the step, the rounding and flattening comprises automatic feeding, automatic rounding, automatic flattening and automatic discharging, the process part is shown in figure 2, two open ends are flat and straight sections, so that the subsequent process is convenient to process, and the blank is inevitably subjected to the influence of various factors, such as overlarge opening, front and back staggered teeth and upper and lower staggered teeth; in order to prevent the overlarge opening or overlapping and wrong teeth of the two open ends of the workpiece in the working procedure before butt welding from influencing the welding quality, the two open ends are firstly processed before the butt welding treatment of the workpiece in the rolling and flattening working procedure, wherein the two open ends are aligned and are connected together by spot welding at 1-2 points, as shown in figure 3, during the specific welding treatment, flash butt welding is adopted to weld the two open ends together to form a cylinder shape;

s2, processing the welding seam to obtain a cylindrical workpiece, wherein the processing of slag planing, welding seam rolling, front and rear end cutting and end burr polishing is carried out when the welding seam is processed;

s3, performing flaring processing on the cylindrical workpiece to obtain a flared workpiece, specifically, expanding two openings of the workpiece into a horn shape with a large outside and a small inside through an equipment mold to reach a process dimension value, as shown in fig. 4, the opening dimensions L1, L2 and the angle θ are determined by debugging according to the rim dimensions, particularly the rim structure dimensions and the rim materials, and the opening dimensions L1 and L2 can be adjusted through the mold, in this embodiment, L2 is greater than L1;

s4, performing expansion finishing on the flared workpiece after rolling forming, wherein the step is performed by two times of rolling forming, the section of the workpiece subjected to the first rolling forming is shown in figure 5, in order to prevent the workpiece placed in a die and in the rolling forming process from shifting left and right and stabilize the quality, the opening angles at two ends are the same as theta and are consistent with the angle theta of the flared workpiece; in order to prevent too large difference of expansion allowance during subsequent expansion finishing and stop the risk of cracking, the size end of L2 is positioned at the right side of the process sectional figure 5 when a workpiece is placed in a die before rolling; in order to reduce the reduction rate of the wheel felloe groove part and facilitate the material to flow to the wheel felloe groove part, the wheel felloe groove of the sectional drawing of the working procedure is set to be in large circular arc transition; the method comprises the steps that deformation is conducted in a segmented mode in the forming process, one-step forming is conducted until the requirement of a process diagram is met, namely, a rim groove portion is deformed, then flat sections of a bead seat and a rim groove connected with the bead seat are deformed, and the requirement of the process diagram is met in the last one-step forming; carrying out secondary roll forming on the primary roll forming process piece, wherein the secondary roll forming process piece is as shown in figure 6, in order to facilitate the extrusion forming of the outer side of the subsequent wheel rim, the outer side part of the wheel rim of the process piece is bent downwards in the process, the forming process is segmented and formed, the primary forming meets the process diagram requirement, namely, the groove part of the wheel rim is deformed, the process diagram requirement is met at last, and the other parts meet the product section requirement except the outer side part of the wheel rim; expanding the calibration diameter of the process piece formed by secondary rolling to the product requirement through an expansion finishing die;

s5, extruding and forming the outer side part of the outer edge of the expanded and finished process piece, namely, extruding and forming the wheel rim of the workpiece only through a die, wherein the process piece is as shown in FIG. 7, and in the forming process, in order to prevent the nominal diameter of the wheel rim and other shapes except the outer side part of the wheel rim from changing, the workpiece is supported by a module, so that the workpiece only forms the outer side part of the wheel rim;

and S6, detecting air tightness and punching and extruding the valve hole.

Compared with the existing standard rim processing technology, the processing technology of the C-shaped rim wheel rim has the following advantages: (1) aligning and spot-welding two open ends of the rolling and flattening process piece to connect the two open ends together, and avoiding overlapping and malocclusion of a subsequent butt welding process and cracking caused by the subsequent process; (2) the rounding procedure is cancelled before flaring, and the rolling forming process only needs two times, so that the third rolling wheel rim preforming is omitted, the equipment investment and the kinetic energy consumption are reduced, and the manufacturing cost is further reduced; (3) the outer side part of the wheel rim of the expansion finishing process piece is extruded and molded to be curled inwards, and the problem that the wheel rim cannot be molded through rolling is solved.

It should be noted that the above examples are only for further illustration and description of the technical solution of the present invention, and are not intended to further limit the technical solution of the present invention, and the method of the present invention is only a preferred embodiment, and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.