CN111266808A

CN111266808A - Method for processing automobile wheel steel ring by using uniform-thickness steel plate

Info

Publication number: CN111266808A
Application number: CN202010143377.8A
Authority: CN
Inventors: 陈云经; 彭京涛; 杨云江
Original assignee: Xingmin Zhitong Group Co ltd
Current assignee: Xingmin Zhitong Group Co ltd
Priority date: 2019-12-20
Filing date: 2020-03-04
Publication date: 2020-06-12

Abstract

The invention discloses a method for processing an automobile wheel steel ring by using an equal-thickness steel plate, which is characterized by comprising the following steps of: s1, blanking to obtain a steel plate with standard size; s2, performing coil butt welding to form a cylinder shape; s3, forming a lock ring groove and a wheel rim through stretching and primary rolling shaping; s5, fine trimming, namely fine trimming the groove top of the locking ring and the waist of the rim; s8, inflating the valve hole. Compared with the prior art, the invention has the following beneficial effects: the steel plate with the same thickness is adopted as a material for processing, so that the steel plate is easy to roll and does not need an additional rounding step; the thickness uniformity of each part of the steel plate is good, and the dynamic balance of the manufactured finished product is good; the process is not limited by the shape of the material any more, and the shape of each part of the rim can be optimized without change. The wheel rims are consistent in shape in the circumferential direction, local deformation caused by repeated processing of the section bars in the prior art is avoided, the difference between the wheel rims and the design scheme is too large, and the working efficiency is improved.

Description

Method for processing automobile wheel steel ring by using uniform-thickness steel plate

Technical Field

The invention relates to the field of automobile manufacturing, in particular to a method for processing an automobile wheel steel ring by using an equal-thickness steel plate.

Background

The conventional processing method of the automobile wheel steel ring is to process the rolled section steel shown in figure 1, the section steel is rolled in advance, the convex parts, such as the part A and the part B in figure 1, are equivalent to reinforcing ribs, the structure causes difficult rounding in the subsequent rounding process, needs multiple rounding operations, is time-consuming and labor-consuming, and due to the processing process characteristics, the end diameter jump of the finished product cannot be effectively guaranteed, so that the comfort of the whole automobile is poor.

In addition, the rolled section steel has different thicknesses and poor uniformity, so that the final finished product has poor dynamic balance and needs to be additionally corrected.

Therefore, how to effectively solve the problems of end diameter jump, dynamic balance and the like of the wheel so as to improve the comfort of the whole vehicle is a problem which is urgently needed to be solved in the field.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: provides a method for processing a wheel steel ring of an automobile by using a uniform-thickness steel plate.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a method for processing an automobile wheel steel ring by using an equal-thickness steel plate comprises the following steps:

s1, blanking to obtain a steel plate with standard size

S2, performing coil butt welding to form a cylinder

S3, forming lock ring groove and wheel rim by stretching and one-step rolling shaping

S5, fine trimming, namely, fine trimming the groove top of the locking ring and the waist of the rim

S8, inflating the valve hole.

On the basis of the technical scheme, the invention can be further improved as follows.

Further, step S5 is followed by a secondary rolling and shaping step, in which the work is partially formed through step S5, and is entirely shaped by the secondary rolling in order to prevent the partial forming from affecting the deformation of other portions.

Further, after the step S3, before the step S5, there is a step S4 of expanding, in which the workpiece in front is expanded from inside to outside to a size required for subsequent processing by the expansion die;

after the step S6, step S7 of shrinking is performed before the step S8, and the workpiece is shrunk from outside to inside to a size required by subsequent processing by a shrinking die, so that the roundness of the rim product can be further improved.

Further, the S2 round-seam welding comprises the following steps

S2-1, rolling into a circle, and rolling the long-strip plate into an unsealed barrel shape;

s2-2, butt welding, and welding and closing the opening end face of the cylinder by a butt welding machine;

s2-3, removing slag, and removing welding slag of the welded welding seam;

and S2-4, primary rolling, namely rolling and flattening the rough surface subjected to slag planing in the S2-3 mode by using an upper roller and a lower roller, wherein the gap between the upper roller and the lower roller can be finely adjusted so as to roll the uneven welding line into a plane with uniform thickness.

And S2-5, cutting ends, wherein the upper surface and the lower surface of the welding seam after slag planing and rolling are processed to be smooth, the front end surface and the rear end surface can keep welding slag sharp angles without processing, and the front end surface and the rear end surface sharp angles are cut off through the process.

And S2-6, rounding, wherein the workpiece after preorder processing is cylindrical as a whole, only the welding seam part is still a plane, and the plane needs to be rounded so as to form the whole workpiece into a more approximate whole circle and prevent the welding seam plane from influencing the next forming.

Further, the S3 stretch forming specifically includes:

the rim stretching forming die is designed to be formed twice,

s3-1, expanding the upper end of the cylinder, and simultaneously deforming the lower end of the cylinder by retracting firstly and then turning over. And finishing the first forming.

S3-2, after the mould is lifted, the upper end turned edge inner mould is placed at the forming position, and the equipment is pressed again, so that the purpose of upper end turned edge is achieved.

Further, the S5 finishing comprises the following steps

S5-1, turning the lock ring groove top, wherein workpieces processed in the preorder cannot completely ensure that the circumferential directions of the lock ring groove top of the same workpiece are consistent, and the diameters of small outer circles of different workpieces are consistent, and the lock ring groove top needs to be subjected to turning processing so as to ensure the interchangeability requirement when all workpieces are assembled with the lock ring.

And S5-2, spinning the waist, and spinning the waist of the half-formed rim by using a spinning device to be thin and increase the width of the rim. The purpose is according to the load state of product, carries out the adjustment of rim local thickness, can reduce the whole weight of product simultaneously.

Compared with the prior art, the invention has the following technical effects:

1. the steel plate with the same thickness is adopted as a material for processing, so that the steel plate is easy to roll and does not need an additional rounding step;

2. the thickness uniformity of each part of the steel plate is good, and the dynamic balance of the manufactured finished product is good.

3. The process is not limited by the shape of the material any more, and the shape of each part of the rim can be optimized without change.

4. The wheel rims have the same shape in the circumferential direction, so that local deformation caused by repeated processing of the section bars in the prior art is avoided, and the difference between the local deformation and the design scheme is overlarge.

Drawings

FIG. 1 is a cross-sectional view of a roll-formed section steel for producing a wheel rim of an automobile wheel in the prior art;

FIG. 2 is a schematic cross-sectional view of a standard steel plate obtained by blanking according to the processing method of the present invention;

FIG. 3 is a schematic cross-sectional view of the finished automobile steel ring manufactured by the processing method of the invention;

FIGS. 4a, 4b and 4c are schematic diagrams illustrating deformation of the workpiece during stretching in the processing method of the present invention;

FIGS. 5a and 5b are schematic diagrams of workpiece deformation in a rolling process of the machining method of the present invention;

FIG. 6 is a schematic view of the deformation of the workpiece at the expansion step of the process of the present invention;

FIGS. 7a and 7b are schematic diagrams of deformation of the workpiece during the secondary rolling process in the processing method of the present invention;

FIG. 8 is a schematic view of the deformation of a work piece in the contraction step of the processing method of the present invention;

FIG. 9 is a schematic view of the apparatus for performing the drawing step in the processing method of the present invention;

FIG. 10 is a flow chart of a process of the present invention;

in the drawings, the parts names represented by the respective reference numerals are listed as follows:

1. a lock ring groove; 2. locking ring groove top; 3. a waist part; 4. a rim; 5. a bead seat; 6. a valve hole.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.

Referring to fig. 2 to 10, the method for processing the wheel rim of the automobile from the uniform-thickness steel plate includes:

in the first step, blanking is performed by using an equal-thickness steel plate, so that a steel plate with a rectangular thickness as shown in fig. 2 is obtained.

Secondly, performing circle rolling and butt welding to obtain a closed cylinder; because the steel plate with the same thickness is adopted, the rolling treatment is very easy, and the condition of non-circular rolling caused by the action of the reinforcing ribs can be avoided.

A third step of stretch forming, which is designed as a two-pass forming, as shown in FIG. 4

S31 first, the upper end of the cylinder obtained in the second step as shown in fig. 4a is expanded while the lower end is deformed by retracting and then turning over to obtain the shape as shown in fig. 4 b. And finishing the first forming.

S32 pressing the shape shown in fig. 4b with its upper end turned over to obtain the shape shown in fig. 4 c.

Performing primary rolling, performing primary rolling on the workpiece finished in the previous step, and performing rolling forming on the step in the lock ring groove, wherein specifically, the shape of the workpiece is rolled from the shape shown in fig. 5a to the shape shown in fig. 5 b;

the stretching apparatus used in this step is shown in fig. 9.

And a fourth step of expanding, namely expanding the workpiece in the previous step from inside to outside to the size required by subsequent processing through an expansion die as shown in fig. 6, wherein the step does not change the appearance of the rim, and only the whole diameter is increased outwards.

And fifthly, fine trimming, wherein the step comprises turning the groove top of the lock ring and spinning the waist to enable the dimensional accuracy of the groove top of the lock ring to reach the standard, and spinning the waist to enable the waist of the workpiece to be thinned, and the step is changed from the step shown in fig. 7a to the step shown in fig. 7 b.

And sixthly, rolling for the second time, wherein the rolling for the second time is used for repairing the deformation of other formed parts in the process of the waist spinning procedure.

And seventhly, shrinking, namely, as shown in fig. 8, the workpiece is shrunk to the size required by subsequent processing from outside to inside through a shrinkage die, and meanwhile, the roundness of the rim product can be further improved.

And eighthly, flushing the valve hole to obtain a finished product of the automobile steel ring.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A method for processing an automobile wheel steel ring by using an equal-thickness steel plate is characterized by comprising the following steps:

s1, blanking to obtain a steel plate with standard size;

s2, performing coil butt welding to form a cylinder shape;

s3, forming a lock ring groove and a wheel rim through stretching and primary rolling shaping;

s5, fine trimming, namely fine trimming the groove top of the locking ring and the waist of the rim;

s8, inflating the valve hole.

2. The method for manufacturing a wheel rim of an automobile from the uniform thickness steel plate as set forth in claim 1, wherein a step of secondary roll-shaping of step S6 is further performed after the step of S5.

3. The method for manufacturing a wheel rim of an automobile from an equal thickness steel plate as claimed in claim 2, wherein after the step S3, before the step S5, there is a step S4 of expanding the workpiece from inside to outside by means of an expansion die to a size required for subsequent processing;

after the step S6, step S8 is preceded by step S7 of shrinking, in which the workpiece is shrunk from outside to inside to a size required for subsequent machining by a shrinking die.

4. The method for manufacturing a wheel steel ring of an automobile from an equal-thickness steel plate as claimed in claim 1, wherein the step S2 of performing the roll butt welding to form a cylindrical shape specifically comprises the following steps:

s2-3, removing slag, and removing welding slag of the welded welding seam;

s2-4, primary rolling, namely rolling and flattening the rough surface subjected to slag planing in the step S2-3 by using an upper roller and a lower roller, wherein the gap between the upper roller and the lower roller can be finely adjusted so as to roll the uneven welding line into a plane with uniform thickness;

s2-5, cutting ends, and cutting off the welding slag sharp corners of the front and rear end surfaces of the workpiece;

and S2-6, rounding, namely rounding the welding seam part so as to form the whole workpiece into a more approximate whole circle.

5. The method for manufacturing a wheel rim of an automobile from a uniform thickness steel plate as claimed in claim 1, wherein the S3 stretch forming comprises the steps of:

s3-1, expanding the upper end of the cylindrical workpiece, and deforming the lower end of the cylindrical workpiece by retracting and then turning over;

and S3-2, secondary stamping to finish edge turning of the upper end of the workpiece.

6. The method of manufacturing wheel rim of car from steel plate of uniform thickness as set forth in claim 1, wherein said S5 finishing comprises the steps of

S5-1, locking the groove top of the ring;

and S5-2, spinning the waist, and spinning the waist of the half-formed rim by using a spinning device to be thin and increase the width of the rim.