JP2000225801A - Automobile wheel and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automobile wheel and a manufacture method thereof which can exhibit excellent runout accuracy, with minimum wastage of material. SOLUTION: An automobile wheel has a front side rim 10, a rear side rim 20 prepared sparately there from, and a disk 30 including an outer periphery portion 35 extending in a direction perpendicular to an axis of the wheel, as well as joined to the front side rim 10 at a front side surface thereof and jointed to the rear side rim 20 at a rear side surface thereof. The front side rim 10 and the rear side rim 20 are obtained by cutting a formerly formed rim with respect to an axial direction thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle wheel and a method of manufacturing the same.

[0002]

2. Description of the Related Art In a wheel for an automobile, a wheel having a design shown in FIG.
There is something called a styled wheel. The rim 1 of the wheel having this structure is usually shaped by an expander or shrinker, and the drop portion 1a, the bead seat portions 2a and 2b, and the flanges 3a and 3b are all integrally formed. The wheel inserts or press-fits an outer peripheral portion 5 that rises inward in the axial direction of the disc 4 into the inner peripheral surface of the bead seat portion 2a of the rim 1, and inserts the end 5a of the outer peripheral portion 5 of the disc 4 and the bead seat portion 2a. It has a structure that is joined to the inner peripheral side. To manufacture a wheel having this structure, the outer peripheral surface of the outer peripheral portion 5 of the disc 4 is cut so as to match the inner peripheral dimension of the bead seat portion 2a of the rim 1, and the disc 4 is moved to the bead seat portion of the rim 1. The end 5a of the disk outer peripheral portion 5 and the back side of the rim bead seat portion 2a were welded by MAG welding (usually carbon dioxide gas arc welding). Also, if the wheel is made of steel,
Normally, a sealing material is applied to the fitting portion 6 because rust is easily generated from the fitting portion 6 between the disk 4 and the rim 1.

[0003]

However, the conventional automobile wheel and the method of manufacturing the same have the following problems. Usually, the two bead seat portions 2a and 2b of the rim 1 shaped by an expander or shrinker are misaligned with each other, and it has been almost impossible to correct this. Therefore, in the rim 1 in which the two bead seat portions 2a and 2b are integrally formed, it is impossible to greatly improve the runout accuracy. Further, since the rim 1 is generally formed of a thin plate, it is difficult to cut the shape of the bead seat portion 2a after welding in order to increase the wheel runout accuracy. Since the disk 4 is integrally formed by drawing a plate material, the outer diameter of the disk material is increased by an amount corresponding to the outer peripheral portion 5 of the disk rising inward in the axial direction, and the material used is wasted. In the case of a steel wheel, a sealing material is applied to the front end of the fitting portion 6 between the disk 4 and the rim 1 to prevent rust, but the generation of rust is very expensive. costly. SUMMARY OF THE INVENTION An object of the present invention is to provide an automotive wheel having good runout accuracy and no waste of material, and a method of manufacturing the same. Another object of the present invention is to provide, in addition to the above objects, an automotive wheel and a method of manufacturing the same, which suppress generation of rust without applying a sealing material.

[0004]

The present invention to achieve the above object is as follows. (1) a front rim formed by cutting the shaped rim in the axial direction, a rear rim formed separately from the front rim, and an outer peripheral end extending in a direction perpendicular to the wheel axis; A disc joined to the front rim on the front side and joined to the back rim on the rear side. (2) a front rim formed by cutting the shaped rim in the axial direction, a rear rim formed separately from the front rim, and an outer peripheral end extending in a direction orthogonal to the wheel axis; A disc joined to the front rim at the front side and joined to the back rim at the back side, and circumferentially continuous, joined at one end to the front rim and joined at the other end to the front side of the disc And an L-shaped reinforcing ring. (3) shaping the rim and cutting the rim in the axial direction to form a front rim and a rear rim; joining a front surface of the disc to the front rim; joining a rear surface of the disc to the rear rim; And a method for manufacturing an automobile wheel. (4) shaping the rim and cutting the rim in the axial direction to form a front rim and a back rim; joining the front rim to the front surface of the disc; joining the back rim to the back surface of the disc; Joining an L-shaped reinforcing ring continuous in the direction to the disc and the front side rim. (5) The manufacture of the vehicle wheel according to (3), wherein at least one of the joining between the front rim and the front surface of the disc and the joining between the rear rim and the back surface of the disc are performed by friction welding. Method. (6) At least one of the connection between the front rim and the front surface of the disk and the connection between the rear rim and the back surface of the disk and the connection between the L-shaped reinforcing ring and the front surface of the disk are made by friction welding. (4) The method of manufacturing a vehicle wheel according to (4).

In the method for manufacturing an automobile wheel of (1) or (2) and the method of manufacturing an automobile wheel of (3) to (6), the rim is shaped into a perfect circle by an expander and a shrinker, and then the rim is mounted. Since the front rim and the back rim are cut, the center of both rims is aligned at the time of welding and assembling. Does not happen
Runout accuracy is improved. In addition, since there is no outer peripheral portion rising inward in the axial direction formed integrally with the disk,
The disc material can be smaller than before. Furthermore, since the disc and the front rim and the disc and the rear rim are configured to be brought into contact with each other and joined, the fitting portion is eliminated, and rust due to water entering the fitting portion is eliminated. Further, since there is no fitting portion into which water enters, there is no need to apply a sealing material.

[0006]

FIG. 1 shows an automobile wheel and a method of manufacturing the same according to a first embodiment of the present invention.
Shows a vehicle wheel according to a second embodiment of the present invention and a method of manufacturing the same. Portions common to the first and second embodiments of the present invention are denoted by the same reference numerals throughout the first and second embodiments of the present invention. First, portions common to the first embodiment and the second embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG. The vehicle wheel according to the embodiment of the present invention includes a front rim 10, a rear rim 20 formed separately from the front rim 10, and a disk 30.

As shown in FIG. 3, the front rim 10 and the rear rim 20 are formed by cutting the rim 40 after shaping with an expander or shrinker into two in the axial direction.
Formed separately. As shown in FIGS. 1 and 2, the front rim 10 has a front bead seat portion 11 and a front flange 12, and the front flange 12 is attached to the front bead seat portion 1.
1 is formed so as to extend from the outer end in the rim axial direction. The front rim 10 has an end 1 on the side cut with the rear rim 20.
3, friction welding with the axially outer surface of the disk 30,
Alternatively, they are joined by MAG welding (usually carbon dioxide arc welding), laser welding, or the like.

The rear rim 20 is provided at the axial center of the wheel with drop portions 21 for dropping one bead of the tire when the tire (not shown) is mounted. 23a and 23b are formed continuously. Sidewall portions 23a, 2
3b and the drop part 21 are respectively connected to the drop connecting part 2
2a and 22b. The drop connecting portions 22a and 22b are formed in an R shape. From the outer peripheral end of the side wall portion 23b on the side where the drop connection portion 22b is not connected, the back bead seat portion 24 extends outward in the rim axial direction. Back bead seat part 24
A rear flange 25 extends from the outside end in the axial direction. Reference numeral 27 denotes a valve hole in which a valve (not shown) is mounted. The back side rim 20 is an end 26 on the side cut with the front side rim 10, and is friction-welded to the back side surface of the disk 30 at the axially central side, MAG welding (usually carbon dioxide gas arc welding), laser welding, or the like. Joined.

The disk 30 has a hub hole 31 at the radial center of the disk 30, and a hub mounting portion 32 around the hub hole 31. Hub mounting part 32
Are provided with a plurality of bolt holes 33 at equal intervals in the circumferential direction. By inserting a hub bolt (not shown) extending from a hub (not shown) into the bolt hole 33 and screwing a hub nut (not shown) into the hub bolt, the wheel is fixed to the hub at the disc 30 portion. In the disk 30, the disk 30 is located radially outside the hub mounting portion 32.
In the range up to the vicinity of the radially outer end 35 of the
4 are provided.

The radially outer end 35 of the disk 30 is
It protrudes slightly radially outward from the end 13 of the front rim 10 and the end 26 of the back rim 20 and can function as a hump on the front rim 10 side. The disk 30
At a portion between the decorative hole 34 and the outer end portion 35, the front side surface is joined to the end portion 13 of the front side rim 10 and the back side surface is connected to the rear side rim 20.
End 26.

In addition to the above structure, the front bead seat portion 11
As shown in FIG. 2, in order to reinforce
A mold reinforcing ring 50 may be provided. L-shaped reinforcement ring 50
Has an annular structure continuous in the circumferential direction as shown in FIG. As shown in FIG. 2, the L-shaped reinforcing ring 50
One end is joined to the inner peripheral side of the front rim 10 and the other end is joined to the front surface of the disk 30. Joining is performed by arc welding, friction welding, or the like.

The front rim 10 and the L-shaped reinforcing ring 50 are joined by arc welding.
Is joined to the connecting portion 11a between the front bead seat portion 11 and the front flange 12 of the front rim 10, since the connecting portion 11a is formed in an R shape, a groove is naturally formed at the connecting portion. And complete penetration welding is easy. When the disc 30 and the L-shaped reinforcement ring 50 are joined by friction welding, the L-shaped reinforcement ring 50 is formed in a shape that allows for the amount of wear at the time of joining.
It is desirable to use

Next, a method of manufacturing the automobile wheel of the present invention having the above structure will be described with reference to FIGS. The method for manufacturing an automobile wheel of the present invention having the above structure includes: a front rim 10, a rear rim 20, and a disc 30; and a front rim 10, a rear rim 20, a disc 30, and an L-shaped reinforcing ring 50. There are types.

First, the case (1) will be described. Front rim 10
And a method of manufacturing the rear rim 20 will be described. As shown in FIG. 3, the front rim 10 and the rear rim 20
After shaping the rim 40 in which the side wall portions 23a and 23b, the front bead seat portion 11, the back bead seat portion 24, the front flange 12, and the back flange 25 are all integrally formed by an expander or shrinker, the front hump portion ( (A portion substantially between the side wall portion 23a and the front bead seat portion 11) and are manufactured separately from each other.

From the rim 40, the front rim 10 and the rear rim 20
When manufacturing the rim, in order to improve the material yield and facilitate the cutting, it is desirable to form the rim 40 so that the cross-sectional shape of the planned cutting position of the rim 40 is thinner than other cross-sectional shapes. In addition, it is desirable that the rim 40 be formed into a shape that allows for the cutting allowance and the shrinkage allowance due to joining with the disk 30 in advance. Furthermore, it is desirable that the thickness of the rim 40 at a portion corresponding to the joint portion with the disk 30 is set to be thicker in advance.

After the front rim 10 and the back rim 20 are manufactured, as shown in FIGS. 1 and 2, the front side of the disk 30 is provided with a front side rim between the decorative hole 34 and the radially outer end 35. The end 13 of the rim 10 is joined by arc welding, laser welding, friction welding, or the like. After joining the front rim 10 and the disc 30, the disc 30 and the end 26 of the back rim 20 are joined. The joining between the back side rim 20 and the disk 30 is performed by arc welding, laser welding, friction welding, or the like. However, the connection between the front rim 10 and the disk 30 and the connection between the rear rim 20 and the disk 30 are performed after the rear rim 20 and the disk 30 are connected.
May be joined together or simultaneously. Further, the joining between the front rim 10 and the disc 30 and the rear rim 20
In the case of arc welding and laser welding, welding between the disk and the disk 30 can be performed from the outside in the axial direction, so that welding is easy.

When joining the front rim 10 and the disc 30 and joining the back rim 20 and the disc 30 from the outside in the axial direction by laser welding, it is easy to perform welding with complete penetration. Further, since the front side rim 10 and the disk 30 have a contact structure and not a fitting structure,
There is no fitting part, and no rust is generated by water entering the fitting part. In addition, since there is no fitting portion into which water enters, a sealing material that has been conventionally used becomes unnecessary, leading to cost reduction. Joining of the front side rim 10 and the disc 30,
When the rear rim 20 and the disc 30 are joined by friction welding, after joining, burrs generated during joining from the outside in the axial direction are removed. In addition, after joining, it is desirable to remove burrs generated during joining inside the rim in the axial direction when they are visible.

Next, the case (1) will be described. Front rim 1
Since the manufacturing method of 0 and the rear rim 20 is the same as the above case, it is applied mutatis mutandis. Front rim 10 and rear rim 2
After the L-shaped reinforcing ring 50 and the front side rim 10
Are joined from the outside in the axial direction by, for example, arc welding. Next, the end 13 of the front rim 10 and the end of the L-shaped reinforcing ring 50 that are not joined to the front rim 10 are joined to the front surface of the disk 30 by, for example, friction welding simultaneously. After the joining, the rigidity of the front rim 10 is improved, so that the outer peripheral side of the front bead seat portion 11 can be cut, and the runout accuracy of the front rim 10 may be improved in advance. Thereafter, the disc 30 to which the front rim 10 and the L-shaped reinforcing ring 50 are joined and the end 26 of the rear rim 20 are joined by friction welding. Alternatively, after manufacturing the front rim 10 and the back rim 20 and joining the L-shaped reinforcing ring 50 and the inner peripheral side of the front rim 10 by, for example, arc welding, the end portion 13 of the front rim 10 and the L-shaped reinforcing ring 5
No. 0 and the end not joined to the front side rim 10 are joined to the front side of the disc 30, and the end 26 of the back side rim 20 is joined to the back side of the disc 30, for example, all at the same time by friction welding. Alternatively, after joining the end 26 of the back rim 20 to the back side of the disc 30, the L-shaped reinforcing ring 50
The end portion 13 of the front rim 10 and the L-shaped reinforcing ring 50 to which the .RTM.

When the joining of the front rim 10 and the disc 30 and the joining of the back rim 20 and the disc 30 are performed by friction welding, the front rim 10 and the disc 30 have a contact structure, not a fitting structure. Therefore, the fitting portion is eliminated, and rust is not generated by water that has entered the fitting portion. In addition, since there is no fitting portion into which water enters, a sealing material that has been conventionally used becomes unnecessary, leading to cost reduction.

When friction welding is used as each joining method, the friction welding portion is subjected to finishing by cutting or the like from the outside in the radial direction because the wear allowance becomes burrs. Regarding the burr generated inside in the radial direction, the front side rim 10 and the disk 3
0 becomes invisible due to the L-shaped reinforcing ring 50, so that finishing is not necessary. The joining between the L-shaped reinforcing ring 50 and the disk 30 and the back side rim 20 and the disk 3
When the burrs can be visually recognized, it is better to finish them by cutting or the like.

In the automobile wheel and the method of manufacturing the same according to the present invention, when joining the front rim 10 and the disc 30, the rear rim 20 and the disc 30, and the front rim 10 and the L-shaped reinforcing ring 50, a large space on the outer peripheral side is required. It can be used, and even when performing arc welding, welding defects are hardly generated, and the generation of spatters is small. Therefore, the generation of rust on the wheel from the sputter-attached portion can be suppressed more than before. Also, when molding the rim 40 before cutting,
By setting the thickness of the portion corresponding to the joint portion with the disc 30 to be thicker, the joining between the front rim 10 and the disc 30 and the joining between the back rim 20 and the disc 30
It becomes strong and can obtain sufficient rigidity and strength as a wheel.

Next, parts unique to each embodiment of the present invention will be described. In the first embodiment of the present invention, as shown in FIG. 1, a case is shown in which the joining between the front rim 10 and the disc 30 and the joining between the back rim 20 and the disc 30 are performed by laser welding. The rim 40 may be formed by cutting a normally formed rim. However, the rim 40 is formed in a shape that allows for a cutting allowance and a shrinkage allowance due to welding in advance, and further has a plate thickness corresponding to a joint portion with the disk 30. It is desirable to use a rim set thicker.

The rim 40 is cut so that the front rim 10 has only the front flange 12 and the front bead seat portion 11. After cutting the rim 40 to form the front rim 10 and the back rim 20, the disc 30 is attached to the outer end 35 and the decorative hole 3.
4, the end 13 of the front rim 10 on the front side.
And the end 26 of the rear rim 20 on the rear side by laser welding from the outside in the axial direction.

In the second embodiment of the present invention, as shown in FIG. 2, in addition to the front rim 10, the rear rim 20, and the disc 30, a front bead seat portion 11, or a front bead seat portion 11 and a front flange 12 are provided. An L-shaped reinforcement ring 50 is used for reinforcement.

In the second embodiment of the present invention, the joining between the front rim 10 and the L-shaped reinforcing ring 50 is performed by arc welding, the joining between the disc 30 and the L-shaped reinforcing ring 50,
And the disk 30 and the rear rim 20 and the disk 30 are joined by friction welding. Further, the L-shaped reinforcing ring 50 includes a front bead seat portion 11 and a front flange 12.
Is joined to the inner peripheral side of the connecting portion 11a, and the groove is naturally formed. Since the joining between the front rim 10 and the disc 30 and the joining between the rear rim 20 and the disc 30 are performed by friction welding, as shown in FIG. It is better to mold.

[0026]

According to the method for manufacturing a vehicle wheel of claims 1 and 2, and the method of manufacturing a vehicle wheel of claims 3 to 6, after the rim is subjected to perfect circular shaping by an expander and a shrinker, Since the front and rear rims are cut by cutting the rims, align the cores of both rims when welding and assembling. No problem occurs, and the runout accuracy is improved. In addition, since the outer peripheral portion which is formed integrally with the disk and rises inward in the axial direction is eliminated, the disk material can be made smaller than before. Furthermore, since the disc and the front rim and the disc and the rear rim are configured to be brought into contact with each other and joined, the fitting portion is eliminated, and rust due to water entering the fitting portion is eliminated. Further, since there is no fitting portion into which water enters, there is no need to apply a sealing material.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an automobile wheel according to a first embodiment of the present invention and a method of manufacturing the automobile wheel according to the first embodiment of the present invention.
It is a half sectional view after assembling.

FIG. 2 shows an automobile wheel according to a second embodiment of the present invention and a method of manufacturing the automobile wheel according to the second embodiment of the present invention;
It is a half sectional view after assembling.

FIG. 3 is a half sectional view in the middle of manufacturing a front rim and a rear rim used in a method of manufacturing a vehicle wheel according to a second embodiment of the present invention and a vehicle wheel according to the second embodiment of the present invention. .

FIG. 4 is a half cross-sectional view in the middle of manufacturing an automobile wheel according to a second embodiment of the present invention and an L-shaped reinforcing ring used in the method for manufacturing an automobile wheel according to the second embodiment of the present invention.

FIG. 5 is a half sectional view of a conventional automobile wheel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Front rim 11 Front bead seat part 12 Front flange 20 Back rim 30 Disk 34 Decorative hole 35 Outer edge 40 Rim (before cutting) 50 L-shaped reinforcing ring

Continuation of the front page (72) Inventor Osamu Ebihara 5-9, Yonbancho, Chiyoda-ku, Tokyo Topy Industries, Ltd. F term (reference) 4E067 BG00 EB00

Claims (6)

[Claims] 1. A front rim formed by cutting a shaped rim in an axial direction, a rear rim formed separately from the front rim, and an outer peripheral end extending in a direction perpendicular to a wheel axis. And
A disc joined to the front rim on the front side and joined to the back rim on the rear side. 2. A front rim formed by cutting the shaped rim in the axial direction, a rear rim formed separately from the front rim, and an outer peripheral end extending in a direction perpendicular to the wheel axis. And
A disc joined to the front rim at the front side and joined to the back rim at the back side; continuous in the circumferential direction, joined at one end to the front rim and joined at the other end to the front side of the disc; And an L-shaped reinforcing ring. 3. A step of shaping the rim and cutting the rim in the axial direction to form a front rim and a rear rim; joining a front surface of the disc to the front rim, forming a rear surface of the disc and the rear rim. And a method for manufacturing an automobile wheel. 4. A step of shaping the rim and cutting the rim in the axial direction to form a front rim and a back rim, joining the front rim to the front side of the disc, and joining the back rim to the back side of the disc. Joining a circumferentially continuous L-shaped reinforcing ring to the disk and the front side rim. 5. A method according to claim 3, wherein at least one of the joining of the front side rim to the front side of the disc and the joining of the rear side rim to the back side of the disc are performed by friction welding.
A method for manufacturing the vehicle wheel according to the above. 6. A friction pressure welding between at least one of a joint between the front rim and the front surface of the disc and a joint between the back rim and the rear surface of the disc and a joint between the L-shaped reinforcing ring and the front surface of the disc. 5. The method for manufacturing a vehicle wheel according to claim 4, wherein the method is performed by: