JP2743085B2 - Automotive wheel joining method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to steel or light alloy wheels mounted on automobiles such as automobiles, trucks and buses.

[Conventional technology]

Conventionally, as shown in FIG. 8, this type of wheel has a disk (14) on the inner peripheral surface of a bead seat (13) of a rim (12).
And insert the outer edge (15) of the disc (14) and the rim (1).
2) is continuously welded by arc welding, or as shown in FIG. 9, a disc (19) is fitted into the inner peripheral surface of the special ledge (18) of the rim (17), The welding method was such that the outer peripheral edge (20) of (19) and the rim (17) were continuously welded by arc welding.

However, in the above structure, the rims (12) (17)
A groove-shaped space (22) is formed in the circumferential direction between the wells (16) (21) and the discs (14) (19), and water and mud enter the space (22) when mounted on the vehicle. There has been a problem in that the wheels tend to accumulate and rust, or the wheels are unbalanced due to accumulated sand or mud.

Therefore, in order to solve the above problem, a plurality of notches (24) are provided on the outer periphery of the disk (23) as shown in FIG. 7, and arc welding (25) is provided between the notches (24) and (24). ) Has been proposed for automobile wheels.

[Problems to be solved by the invention]

In the above-described conventional method for joining wheels for automobiles, it is necessary to form the same number of welds as the cutouts provided on the outer peripheral portion of the disk, so that there is a problem that the welding device becomes very complicated.

In addition, impurities and segregation easily remain in the crater at the end of arc welding, and cracks are likely to occur during cooling.
Although it is preferable that the number of craters is small also in the joining of automobile wheels, in the above-mentioned conventional joining method, the same number of craters as the number of cutouts occurs, and there is a risk that the strength of the wheel is reduced.

[Means for solving the problem]

The present invention has been made in order to solve the above-mentioned conventional problems, and fits a disk having an axial groove on an outer peripheral portion into a bead seat inner peripheral portion or a special ledge inner peripheral portion of a rim, and then fits the rim with the rim. A closing member made of a material having a higher melting point than the rim and the disk is inserted into the space formed by the groove so that the tip of the closing member projects from the outer peripheral edge of the disk toward the welding surface, and the outer peripheral edge of the disk and the rim are inserted. And a method for joining the automotive wheel, wherein the closing member is removed by continuously joining the closing member by arc welding, and the closing member made of the high melting point material is made of a high melting point metal or ceramics. It is intended to provide a method for joining automobile wheels, characterized in that the method is formed and inserted.

[Action]

The method for joining an automobile wheel of the present invention has the above-described configuration, and welding is performed with the closing member inserted into the space formed by the rim and the groove of the disk, so that the space can be closed with the weld metal. Absent.

Since the arc during welding moves over the closing member without interruption, continuous welding is possible.

The temperature of the arc is very high, but since the arc is moving sequentially, the temperature of the closing member does not rise to the melting point, so that the closing member is not joined to the wheel.

Also, when the closing member is made of ceramic, since the ceramic has a high electric insulation resistance, the arc is drawn to the disk side having a small electric resistance at the position of the closing member, so that the temperature rise of the closing member can be effectively prevented. At the same time, a good weld bead is formed on the disk.

Embodiment 1 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a joint portion of an automobile wheel, wherein (1) is a rim and (2) is a disk.

An axial groove (5) is formed in the outer peripheral portion (4) of the disk (2).
Are provided at a plurality of locations.

The disc (2) is fitted into the inner periphery of the bead seat (3) of the rim (1), and the rim (1) and the groove (5) form a space (6) penetrating the front and back of the disc (2). ing.

Next, as shown in FIG. 2, a closing member (8) made of a refractory metal such as a tungsten alloy or a molybdenum alloy is provided in the space (6), and a tip (9) thereof becomes a welding surface of the disk (2). Insert so as to protrude from the outer peripheral edge (7).

In this state, the rim (1) and the outer peripheral edge (7) of the disk (2) are continuously arc-welded over the entire circumference, so that the welding bead (10) is in a state as shown in FIG. Is formed, and the welding is completed.

Next, by removing the closing member (8), the joining is completed without closing the space (6) as shown in FIG.

It should be noted that the present invention can be applied to an automobile wheel in which a disk is fitted and joined to the inner surface of a special ledge portion of a rim.

Embodiment 2 Next, a case where ceramic is used for the closing member will be described.

As shown in FIG. 5, the arc (11) during welding is generated toward the boundary between the outer peripheral edge (7) of the disk (2) and the rim (1) in a general portion where no void is formed. As shown in FIG. 6, when passing over the closing member (8), the electric resistance of the closing member (8) is so high that the arc (11) is drawn toward the disk (2).

As a result, the temperature rise of the closing member (8) is small, and the deposited metal is deposited cleanly on the outer peripheral edge (7) of the disk (2).

The shapes of the discs and the grooves are not limited to those in the above-described embodiment, but are similarly carried out on cast discs, press-formed discs, and discs of various shapes by various manufacturing methods, regardless of the method of forming the grooves. It is possible.

〔The invention's effect〕

Since the method of joining an automobile wheel according to the present invention has the above-described configuration, it is not necessary to introduce a complicated apparatus, and an automobile wheel having a drain groove can be easily manufactured using a conventional welding apparatus. .

In addition, since continuous welding is possible, productivity is excellent.

Further, since harmful craters can be formed only in one place, the strength of the wheel is greatly improved, which is an excellent effect.

[Brief description of the drawings]

1 to 4 show an embodiment of the present invention. FIG. 1 shows a state in which a rim and a disk are fitted, FIG. 2 shows a state in which a closing member is inserted, and FIG. 3 shows a state in which arc welding is performed. 4, FIG. 4 is an explanatory view of a joint showing a state where a closing member is removed, FIGS. 5 and 6 are explanatory views showing an arc state of another embodiment of the present invention, and FIG. 7 is a conventional example. 8 and 9 are cross-sectional views of a vehicle wheel showing a conventional example. (1) (12) (17) ... Rim, (2) (14) (19) (2)
3) Disc (3) (13) Bead sheet (4) Peripheral part (5) Groove (6) Void (7) (15) (20) Peripheral edge Part, (8) ... closing member (9) ... tip, (10) ... welding bead (11) ... arc, (16) (21) ... well part (18) ... special ledge part (22) )… Space, (24)… Notch (25) …… Arc weld

Claims (2)

(57) [Claims] 1. A method for joining a wheel for an automobile to fix a disk by arc welding to an inner periphery of a bead seat of a rim or an inner periphery of a special ledge. A plug member made of a high melting point material is inserted into the space formed by the groove and the rim of the disk so that the tip protrudes from the outer peripheral edge of the disk toward the welding surface side. Then, after the outer peripheral edge of the disk and the rim are continuously joined by arc welding, the closing member is removed, and the joining method of the automobile wheel is characterized in that. 2. The method according to claim 1, wherein the high melting point material is formed of a high melting point metal, ceramics or the like.