JPH0195901A - Automobile wheel - Google Patents

Abstract

PURPOSE:To improve rust and corrosion preventive properties, durability, and external ormanental property of a wheel by using a cladding metal for each material of a rim and a disk which constitute the wheel. CONSTITUTION:A wheel used in automobiles is formed of a rim 1 and a disc 2. In this case, for example, a rim clad material 1-2 and a disk clad material 2-2 of double faced type are used to a rim base material 1-1 and a disc base material 2-1, respectively. Namely, the wheel is produced, for example, using high tensile strength steel sheets of 60kgf/mm<2> as each base material 1-1, 2-1, and double faced cladding metals of stainless steel and aluminum produced by explosion bonding process as each clad material 1-1, 2-2. Hence, the rust and corrosion preventive properties and durability of the wheel can be improved. Furthermore, the use of stainless steel and aluminum having peculiar ornamental properties as the clad material results in an improved external appearance of the wheel.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to wheels used in automobiles (including two-wheeled vehicles), and relates to automobile wheels with improved weather resistance, anti-rust/corrosion properties, and decorative appearance. .

Technical Background Automobile wheels are important parts for safe driving of automobiles, and need to have sufficient structural strength, but they also need to fulfill the following roles and functions.

0 Durability Wheels need to support the weight of the vehicle and the load at all times, but as these move as repetitive loads as the wheels rotate, the wheels need to be durable against loads that act in the radial direction.・Also, since the centrifugal force acting on the car body during cornering acts as a bending moment on the wheels, durability under rotational bending is also required. .

O Lightweight The ride comfort of a car when driving on rough roads is related to the unsprung weight, and making the wheels lighter helps improve ride comfort. It is also needed to improve fuel costs.

Q Cooling function The brakes installed on the wheels of automobiles generate a large amount of frictional heat due to continuous braking. For example, in the case of a disc brake, if the rotor becomes hot, the I-rake performance will be significantly reduced. Very dangerous. Therefore,
The wheels have air holes and fins to provide cooling. Further, the wheel needs to have a space for accommodating such brake components (for example, a space that can secure a sufficient diameter of the rotor of a disc brake).

○ Design wheels are often seen by the general public because they are mounted on the outside of the vehicle body, so there is a strong tendency for the market to prefer wheels with excellent design. Therefore, design is taken into consideration not only in the shape of the wheel but also in the shape and number of air holes.

○ Rust and Corrosion Resistance Automobiles are often used in corrosive environments such as snow melting salt sprinkled on highways during the winter and salt at the beach, and are often parked outdoors, so their wheels need to be rust and corrosion resistant. be.

By the way, [the general structure of the j-wheel is
As shown in the figure, it consists of a rim (3) and a disk (4), both of which are joined together by arc welding, spot welding, rivets, etc.

The rim (3) has a rim flange part (3-1), a bead seat part (3-2), a well part (3-3), and a valve hole (3-
4) is formed, and the disk (4) has a center hole (4-
1), bolt holes (4-2), air holes (4-3) are drilled, and a hat portion (4-4) extending in the axial direction is formed.

The rib I-section functions to prevent buckling of the disk and increase structural rigidity.

Further, an offset distance is provided between the inner contact surface of the disk (4) and the rim center line.

This is to ensure space inside for storing brake-related parts, and to provide movement that weakens the propagation of the impact of the ground force when driving on rough roads.

BACKGROUND OF THE INVENTION As measures for preventing rust and corrosion of automobile wheels and considering their decorative properties, there are the following widely known coating methods.

■ Metsuki wheels for automobiles (Japanese Patent Application Laid-open No. 60-13530
2) This wheel has a long lifespan due to the nickel and chrome plating applied to the rim and disc prior to welding to give a decorative appearance.

■ Vehicle wheel (Japanese Patent Laid-Open No. 6O-1002) This wheel has an inorganic sprayed layer on the rim 7 lange, bead seat, and disc to provide rust and corrosion resistance.
It has improved scratch resistance.

■ Rust prevention treatment method for disc wheels (Japanese Unexamined Patent Application, First Publication No. 61-111) This method is characterized by applying a vinyl chloride resin sealant as a filler to the gap between the rim and the disc.

Problems with conventional technology However, the conventional methods (1) to (4) have the following drawbacks.

■ Wheels with nickel and chrome plating on the rim and disc have relatively thin nickel and chrome layers formed by the plating, and if the wheel is scratched, it will easily penetrate through the plating layer, preventing rust and corrosion. The disadvantage is that the sex is impaired.

The wheel with the thermal sprayed layer (2) has the same disadvantages as the thermal sprayed layer (2) in that the thickness of the thermal sprayed layer is thin and because it is made of powder, it lacks density.

The rust prevention treatment method (2) is a rust prevention method for the gap between the rim and the disc, and has the disadvantage that it can only prevent rust locally.

This invention was made to eliminate the above-mentioned drawbacks of the conventional wheels, and aims to provide a wheel that is excellent in rust prevention, corrosion resistance, and decorativeness.

Means for Solving the Problems The present invention solves the conventional drawbacks by using clad material for the rim and disc that constitute the wheel.

Here, the cladding material may be either a single-sided cladding material or a double-sided cladding material, and although the material is not specified, for example, the base material may be steel.

A plate is used, and the mating material is stainless steel, aluminum, etc., which have anti-rust and anti-corrosion properties. Materials that have been tested shall be used.

The reason we used clad material for the working rim and disc is that in a corrosive environment where salt etc. are present, we use a laminate material with excellent rust and corrosion resistance on the side that is exposed to the corrosive environment. This is to protect. Especially for scratches caused by external factors, even if the scratch is quite deep, if it is less than the thickness of the laminate,
Rust and corrosion prevention properties are not impaired and a long lifespan can be obtained.

It also exhibits excellent rust and corrosion protection against rainwater and liquids that enter the gap near the joint between the disc and the rim and the gap between the tire and the rim flange.

Furthermore, by using stainless steel, aluminum, or the like, which has unique decorative properties, as the laminate material, the wheel can have a decorative appearance.

Figure 1 shows an example of a wheel according to the present invention, where Figure (A) is a longitudinal cross-sectional side view of the main part showing an example in which double-sided clad material is used for the rim and disc material, and Figure (B) is the rim and disc material. FIG. 3 is a longitudinal cross-sectional side view of a main part showing an example in which a single-sided cladding material is used.

That is, (1-1) is the rim base material, (1-2) is the rim mating material, (2-1) is the disc base material, and (2-2) is the disc mating material. In addition, when a single-sided clad material is used as the material, as described above, the rim mating material (1-2) and the disc mating material (2-2) are used on the outside, that is, the side that contacts the corrosive atmosphere. The thickness of the base material of the cladding material and the cladding material shall be determined as appropriate depending on the diameter of the wheel, the type of automobile, etc.

Examples Example 1 A double-sided cladding material (1m thick) using the explosion bonding method, using a 60ksf4 class high-tensile steel plate as the base material and stainless steel and aluminum as the mating plate.
A 14-inch diameter wheel was made from the laminated material (0.5 mm thick), and this wheel was sandblasted (20 m/s,
A scratch was made with a 0.5 mm mesh (50 g/s, 20 s, 0.5 mm mesh), and a corrosive solution (temperature 80'C) shown in Table 1 was sprayed until rust appeared on 80% of the outer surface of the disk. Table 2 shows the results of a corrosion resistance test over time, in comparison with conventional chrome plating and nickel plating.

Table 2 shows that the wheels of the present invention did not rust even after 500 hours, and were much more rust-proof and rust-proof than the conventional metal wheels.
It can be seen that it has excellent corrosion resistance.

Example 2: In order to investigate the durability of the wheel obtained in Example 1, we conducted a rotational durability test in which the wheel was rotated while applying a bending moment, and the amount of rotation until fatigue cracking was investigated. Table 3 shows a comparison between chrome plating and nickel plating.

From Table 3, it can be seen that especially in the case of wheels where the mating material is made of stainless steel, durability is clearly improved when the disc base material has the same thickness compared to conventional chrome or nickel plated wheels.

Furthermore, it can be seen that almost the same durability as the conventional disk base material of 3.7 mm thickness can be obtained. Therefore, it can be seen that the wheel of the present invention has sufficient performance in terms of durability as well.

In addition, all of the wheels of the present invention made of cladding materials had no harmful cracks originating from the joints between the cladding material and the base material, and no adverse effects on the durability of the joints were observed.

As described in detail, the wheel made of the cladding material of the present invention has excellent performance superior to conventional wheels, such as excellent rust and corrosion resistance, and excellent durability. Furthermore, by using stainless steel or aluminum, which has unique decorative properties, as the laminate material, there is an advantage that the wheel can have a decorative appearance.

[Brief explanation of the drawing]

Figure 1 shows an example of the wheel of this invention, and Figure (
A> is a vertical cross-sectional side view of a main part showing an example in which a double-sided clad material is used for the rim and disk material, and FIG. Fig. 2 is a diagram showing a conventional steel wheel, in which figure (A> is a front view and figure (B) is a side view with a main part cut away. 1... Rim 1-1... Rim base material 1 -2
...Rim fitting material 2...Disk 2-1...
・Disc base material 2-2...Disc lamination applicant Sumitomo Metal Industries, Ltd.

Claims (1)

[Claims] An automobile wheel comprising a rim and a disc, characterized in that the rim material and the disc material are made of clad material.