JPH10175401A - 2-piece full design wheel and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plating wheel of 2-piece full design and a method of its manufacture by reducing cost while holding aesthetic and corrosion resistance of the plating wheel. SOLUTION: In a 2-piece full design wheel comprising a disk 2 having a flange part 2a and a rim 1 welding a bead seat part 1a connected to a reverse side 2b of the flange part 2a, in a surface side of the disk 2, a semi-gloss nickel plating layer 3, gloss nickel plating layer 4 and a chrome plating layer 5 are successively formed, after welding connection to the rim 1, on the chrome plating layer 6, a resin-made clear paint layer is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a two-piece full design wheel and a method of manufacturing the same.

[0002]

2. Description of the Related Art Plated wheels are ones that enhance the fashionability and aesthetics of automobile wheels. As the plating wheel, a disc 2 is welded to the drop portion 1b of the rim 1 as shown in FIG. 6, and the disc 2 is welded to the back side of the rim bead sheet 1a of the rim 1 as shown in FIG. There are types. In these types of plating wheels, the disk and the rim were each plated separately, and then the two were welded together.
Alternatively, plating was performed after assembly welding. In this case, since the rim portion also comes to the front, the front side of the rim together with the disk must be plated. Recently, the so-called two-piece full design wheel, in which the flange portion is welded to the disc and the bead seat portion of the rim is welded to the back of the flange portion so that the design surface of the wheel can be enlarged to further enhance fashion and aesthetics, has been developed and popular. Have gained. In this type of plating, the entire wheel is immersed in a plating tank after welding and joining the rim and the disk, and plating is mainly performed mainly on the front side of the disk.

[0003]

However, the former (rim, rim,
In the case of plating a disk separately and then welding the rim and the disk), it is inevitable that the cost increases because the rim and the disk are plated respectively. Also, in the case of the plating wheel of the latter (the rim and the disk are plated after welding), the two-piece full design wheel
In addition to this, the plating solution accumulates in the recess at the joint between the rim and the disk, so that the plating solution is wasted and the cost of processing the plating solution has been increased. Furthermore, performing plating after the rim and disk have been assembled means that the plating target is bulky, the productivity is low, and the equipment must be large-scale. Was out. Fig. 7 for two-piece full design wheels
First, a semi-bright nickel plating layer 3 is formed on the rim of a steel wheel, which is a substrate to be plated, and a bright nickel plating layer 4 and a chromium plating layer 5 are formed thereon, and then the rim is formed. Attempts have also been made to assemble by welding after plating the disk and the disk respectively.In that case, micro cracks are likely to occur due to the thermal effect of welding on the surface layer of the plating on the front side of the disk. In some cases, moisture permeates and the corrosion rate of the plating layer is increased to cause a problem in the durability of the wheel. The object of the present invention is to provide a highly fashionable two-piece full design plated wheel without quality problems.
It is to provide at low price.

[0004]

The present invention for achieving the above object is as follows. (1) A two-piece full design wheel, comprising: a disk having a flange portion; and a rim having a bead seat portion welded to the back side of the flange portion of the disk, wherein a semi-gloss nickel A two-piece full design wheel in which a plating layer, a bright nickel plating layer, a chrome plating layer, and a clear resin coating layer are sequentially formed. (2) A method for manufacturing a two-piece full design wheel, comprising: a disk having a flange portion; and a rim having a bead seat portion welded to the back side of the flange portion of the disk, wherein a half of the disk is provided on the surface on the front side of the disk. Forming a bright nickel plating layer, forming a bright nickel plating layer on the semi-bright nickel plating layer, and forming a chrome plating layer on the bright nickel plating layer, A step of welding and joining a bead sheet portion of a one-sided flange rim which has been painted in advance on the back side of the flange portion of the chromium-plated disc, and forming a resin clear coating layer on the front side of the welded disc; And a method of manufacturing a two-piece full design wheel.

In the two-piece full design wheel of the above (1), even if there is a minute crack in the plating layer, the top coat layer made of the clear paint of the resin is formed on the plating layer, so that moisture, oxygen, and the like penetrate. Therefore, sufficient durability can be obtained. In the manufacturing method of the above (2), the rim is coated without being plated, the disk is plated separately, and the rim and the disk are welded and joined to form a resin topcoat layer. High quality two-piece full design wheels can be manufactured without being affected by the heat of welding.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a two-piece full design wheel according to a preferred embodiment of the present invention and a method of manufacturing the same will be described with reference to FIGS. Parts and parts that are the same as those in the conventional example will be described with the same reference numerals. FIG. 3 shows a basic shape of a full design type automobile wheel according to an embodiment of the present invention, where 1 is a rim. The rim 1 has a rim flange 1c on one side, and the other end ends with a bead seat 1a without a flange. Reference numeral 2 denotes a disk, and the disk 2 has a flange portion 2a normally provided on the rim. The front end of the bead seat portion 1a of the rim 1 is welded to the back side of the flange portion 2a of the disk 2. With this configuration, the joint between the rim and the disc cannot be seen from the front side of the wheel, and the design surface of the wheel can be enlarged. As shown in FIG. 2, a semi-bright nickel plating layer 3, a bright nickel plating layer 4, a chromium plating layer 5, and a clear coating layer 6 are sequentially formed on the substrate 2 on the front side of the disk.

Next, a method for manufacturing a two-piece full design wheel of the present invention will be described with reference to FIG. First, in step (a), a steel one-sided flange type rim 1 is prepared and subjected to a coating process. Electrodeposition coating is desirable from the viewpoint of efficiency. In the step (b), a steel disc 2 having a flange portion 2a is prepared,
Plating is applied to at least the front side portion of the disk 2. The details of the plating process will be described with reference to FIGS. A hatched portion in FIG. 1A is a portion to be plated. In the plating process, first, a semi-bright nickel plating layer 3 of about 15 to 20 μm is formed on the steel material 2 on the front side of the disk 2 by wet plating. Next, a bright nickel plating layer 4 is formed on the semi-bright nickel plating layer 3 by wet plating to a thickness of about 5 to 10 μm. Next, a chromium plating layer 5 is formed on the bright nickel plating layer 4 by the same wet plating method in a thickness of about 0.15 to 0.25 μm.

[0008] The formation of a semi-bright, bright double nickel plating layer on a steel substrate is based on the following reasons. For example, if there is a pinhole in the chromium plating, if the nickel is corroded and reaches the steel base, steel has a greater ionization tendency than nickel,
From that point on, the corrosion of the steel will occur more severely than nickel, and the plating will proceed to rust.
However, utilizing the fact that nickel plating is more susceptible to corrosion when the sulfur content is higher, if corrosion holes are formed in the chromium plating layer, the nickel bright plating layer under chromium has the largest apparent ionization tendency. This is because the semi-glossy nickel plating layer and then the chromium plating layer make the bright nickel plating layer a sacrificial corrosion layer, and the corrosion progresses in the horizontal direction, saving time until the steel rusts. .

Next, in step (c), the front end of the bead sheet 1a of the rim 1 is abutted against the back side 2b of the flange 2a of the disk 2, and the rim 1 and the disk 2 are assembled by welding. Next, in step (d), a clear coating layer 6 made of, for example, an acrylic, polyester, or melamine resin is formed on the chromium plating layer 5 with a powder coating or a solvent coating of about 15 to 20 μm. Due to the formation of the clear coating layer 6, for example, due to the heat effect during welding,
Even if fine cracks that are invisible to the chromium plating layer 5 are generated, they are covered by the clear coating layer 6, so that invasion of moisture or the like can be prevented. In the above, the step (a) may be performed before the step (c), and the order of the steps (a) and (b) does not matter. The two-piece full design wheel manufactured by the above process can reduce the plating processing cost by about 30% as compared with the conventional method in which the disk and the rim are assembled and then plated.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to examine the surface treatment performance, (a) a semi-glossy nickel plating layer 3, a glossy nickel plating layer 4,
A plated plating layer 5 is formed in order, and a bead sheet 1a of the rim 1 which has been coated is welded to the back side 2b of the flange 2a of the disk 2. Then, an acrylic layer is formed on the chrome plating layer 5 on the front side of the disk 2. (B) a semi-bright nickel plating layer, a bright nickel plating layer, and a chromium plating layer are formed on the front surface of the disk, and after welding welding with the rim, Was prepared without forming a clear coating layer, and a cas test was performed to determine the corrosion resistance of chrome plating specified by JIS.

After 60 hours of the cast test, the presence or absence of plating cracks in the plating layer on the front side of the disk was visually determined from a position of 50 cm. As a result, plating cracks occurred on all wheels without clear coating,
No plating crack occurred on any of the wheels that had been subjected to clear coating. As a result, it was confirmed that forming a clear coating layer on the chromium plating layer was effective in preventing plating cracks.

[0012]

According to the first aspect of the present invention, a semi-glossy nickel plating layer, a glossy nickel plating layer, a chromium plating layer, and a clear resin coating layer are formed on the substrate on the front side of the disk. Therefore, the corrosion resistance of the two-piece full-design plated wheel can be further improved. According to the method of claim 2, the rim is coated without plating, and after being welded and assembled to the back side of the disk having the flange portion subjected to chrome plating, a clear resin coating process is performed on the chrome plated layer. Therefore, the plating cost can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a partial sectional view of a wheel according to an embodiment of the present invention.

FIG. 2 is a sectional view showing the configuration of a wheel surface treatment layer according to an embodiment of the present invention.

FIG. 3 is a sectional view showing a basic shape of the wheel according to the embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a method of manufacturing a wheel according to an embodiment of the present invention and a shape for each manufacturing process.

FIG. 5 is a sectional view showing an example of a conventional plating wheel.

FIG. 6 is a sectional view showing another example of a conventional plating wheel.

FIG. 7 is a sectional view showing a plating layer of a conventional plating wheel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rim 1a Rim bead seat part 2 Disc 2a Flange part 2b Back side of flange part 3 Semi-gloss nickel plating layer 4 Glossy nickel plating layer 5 Chrome plating layer 6 Clear coating layer made of resin

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI C25D 5/14 C25D 5/14 (72) Inventor Toru Shimizu 5-9, Yonbancho, Chiyoda-ku, Tokyo Topy Industries, Ltd.

Claims (2)

[Claims] 1. A two-piece full design wheel comprising: a disk having a flange portion; and a rim formed by welding a bead seat portion to the back side of the flange portion of the disk. Nickel plating layer, bright nickel plating layer, chrome plating layer,
A two-piece full design wheel in which a clear resin coating layer is formed in order. 2. A method for manufacturing a two-piece full design wheel, comprising: a disk having a flange portion; and a rim having a bead seat portion welded to the back side of the flange portion of the disk, wherein a front surface of the disk is provided. Forming a semi-glossy nickel plating layer, forming a glossy nickel plating layer on the semi-glossy nickel plating layer, and forming a chromium plating layer on the glossy nickel plating layer Welding a bead seat portion of a one-sided flange rim, which has been painted in advance, to the back side of the flange portion of the chromium-plated disc; and a resin clear coating layer on the front side of the welded disc. Forming a two-piece full design wheel.