JP3269786B2 - Manufacturing method of automobile wheel and automobile wheel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art FIG. 6 is a sectional view of a main part of a conventional vehicle wheel mounted on a vehicle body. Disk (1
The wheel body (1) comprising the rim portion (12) and its outer periphery is formed of a magnesium alloy, and the disc portion (1) is formed of a magnesium alloy.
A hub hole (14) is formed at the center of 1). In addition, a corrosion prevention plate (21) made of an aluminum alloy is provided at the center of the back surface of the disk (11), and a hub hole of the disk (11) is provided.
(14) and the central hole of the corrosion prevention plate (21) are located coaxially, and the corrosion prevention plate (21) and the disk portion (11) are bonded with an adhesive. The corrosion prevention plate (21) is provided on the disk part made of magnesium alloy in the automobile wheel.
This is to prevent (11) from directly contacting the iron disk mounting surface of the vehicle body to prevent electrolytic corrosion. That is, the electrolytic corrosion becomes remarkable as the difference between the standard electrode potentials of the two different metals that come into contact with each other via moisture increases, but the standard electrode potential of magnesium (−2.363) and the standard electrode potential of iron Since the potential difference of (−0.4402) is larger than the potential difference between the standard electrode potential of aluminum (−1.7) and the standard electrode potential of iron, electrolytic corrosion is remarkable in the former, whereas electrolytic corrosion is in the latter. This is because it hardly occurs. In the above-mentioned components, the portion of the wheel body (1) other than the portion where the corrosion prevention plate (21) is provided is coated with a coating for corrosion prevention.

In this vehicle, the overlapping portions of the bolt insertion holes (10) and (10) and the bolt insertion portions (23) and (23) in the wheel body (1) project from the disk mounting surface (30) of the vehicle body. Extrapolated to the tightening bolts (41) (41), and then the bolts (41) (41)
When the tightening nuts (44) and (44) are screwed into the tips of the wheels, the wheel body (1) is mounted on the disk mounting surface (30) via the corrosion prevention plate (21) made of aluminum alloy.

[0004]

However, the above-mentioned vehicle wheel has the following problems. The adhesive interposed between the disk portion (11) and the corrosion prevention plate (21) is easily damaged, and rainwater enters the damaged portion and the wheel body (1) is easily corroded. The fastening bolts (41) and (41) and the fastening nuts (44) and (44) that fix the vehicle wheel to the disc mounting surface (30) are likely to loosen over time.

The above problem will be described in more detail. As shown in FIG. 7, when the vehicle wheel mounted on the disk mounting surface (30) of the vehicle body is tightened with the tightening nuts (44) (44), the component wall of the disk portion (11) is tightened with the tightening bolts (41). ) Is bent the most toward the disc mounting surface (30), and the disc (1
The back surface of 1) is totally distorted. FIG. 7 exaggerates the distortion of the disk section (11). In order to absorb this distortion, the one shown in the figure uses an elastic material as the adhesive (51) for bonding the wheel body (1) and the corrosion prevention plate (21). (44) If the adhesive (51) is left in a distorted state following the curved shape of the back surface of the disk portion (11) distorted by the tightening of (44), the internal It is left in a state where the stress is accumulated. Therefore, the adhesive (5
When 1) loses elasticity over time and gradually hardens, cracks are formed in the above-mentioned portion having a large internal stress, and rainwater easily enters the portion. When rainwater enters the crack, the constituent wall of the disk portion (11) in contact with the rainwater is corroded.

On the other hand, if a crack is formed near the tightening portion of the tightening nut (44) with the adhesive (51) and the crack is broken as in the prior art, the disk portion (11) and the corrosion prevention are prevented from forming in this portion. Board (2
Since the adhesive (51) as an inclusion during 1) is partially missing, the tightening nut (44) rattles, and this becomes easy to loosen. The present invention has been made in view of such a point, and makes it difficult to damage the bonded portion between the corrosion prevention plate (21) and the disk portion (11), thereby, the disk portion (11) and the corrosion prevention plate (21). In addition to preventing rainwater from entering the boundary of the vehicle, preventing damage to the wheel body (1), the tightening bolt (41) and the tightening nut (4) for attaching and fixing the vehicle wheel to the vehicle body
The task is to be able to suppress the loosening of 4).

[0007]

Means for Solving the Problems The technical means of the invention according to the first aspect of the present invention adopted to solve the above-mentioned problem is that "a bolt insertion hole (41) through which a tightening bolt (41) for mounting an automobile wheel is inserted. 10) A disk portion (11) including (10) and formed of a magnesium alloy, and a portion corresponding to the disk mounting surface (30) of the vehicle body on the back surface of the disk portion (11) having elasticity. A method for manufacturing an automobile wheel including a corrosion prevention plate (21) made of an aluminum alloy adhered with an adhesive, wherein a wet-dried portion is formed at a boundary between the corrosion prevention plate (21) and the disk portion (11). A step of superposing the corrosion prevention plate (21) and the disk portion (11) with an adhesive interposed therebetween, and attaching the disk portion (11) and the corrosion prevention plate (21) to the disk mounting surface. Drying the adhesive while holding it in the distorted shape attached to (30). To "it is.

[0008] According to the above technical means, the disk portion (11) and the corrosion prevention plate (21) are subjected to the same strain as that generated when the vehicle wheel is mounted on the vehicle body. Is dried and solidified. Therefore, this car wheel is used for the disc mounting surface (30) of the car body.
When the disc (11) is distorted by the tightening force of the tightening bolts (41) and the tightening nuts (44) when it is attached to the, the above adhesive is conversely free (the shape at the time of drying and solidifying). Return. Therefore, when the vehicle wheel is mounted on the disk mounting surface (30) of the vehicle body, these disk portions (11)
Unreasonable internal stress does not act on the structure of the adhesive interposed between the anticorrosion plate and the corrosion prevention plate (21).

According to another aspect of the present invention, there is provided a bolt insertion hole (10) for inserting a fastening bolt (41) for mounting an automobile wheel. And a disk part (11) formed of a magnesium alloy, and an aluminum alloy corrosion bonded to a part corresponding to the disk mounting surface (30) of the vehicle body on the back surface of the disk part (11) with an adhesive. A method for manufacturing an automobile wheel including an anti-corrosion plate (21), wherein an undried adhesive having elasticity is interposed at a boundary between the corrosion-prevention plate (21) and the disk portion (11). These corrosion prevention plate (21) and disk part (11)
Stacking the disk portion (11) and the corrosion-prevention plate (21), bringing the assembly into contact with the work surface from the corrosion-prevention plate (21) side, (11)
Drying the adhesive while keeping the bolt insertion hole (10) portion pressed against the work surface,
The force pressing the work surface has a magnitude equal to the tightening force of the tightening nut (44) on the tightening bolt (41) when mounting the disk (11) on the disk mounting surface (30). Is set. "

According to the above technical means, when the adhesive is dried, the bolt insertion hole (10) of the disk portion (11) is pressed against the work surface. When the disk is mounted on the disk mounting surface (30), the tightening force is set such that these are tightened with the tightening bolt (41) and the tightening nut (44). Therefore, when the disk (11) is pressed against the work surface, the same distortion as that generated when the vehicle wheel is mounted on the vehicle body is caused by the disk portion (11) and the corrosion prevention plate (21).
Can be provided. That is, among the constituent walls of the disk portion (11), the constituent walls of the bolt insertion holes (10) are the corrosion prevention plates (21).
To the disk portion (11), and the distortion that reduces the degree of adhesion between the component wall of the disk portion (11) and the corrosion prevention plate (21) decreases as the distance from the bolt insertion hole (10) increases. It is applied to the prevention plate (21).

Therefore, the disk portion (11) thus distorted
The undried adhesive interposed between the and the corrosion prevention plate (21) is dried and solidified in a shape corresponding to the distorted shape. The technical means of the invention of claim 3 for solving the above-mentioned problem is as follows:
`` A disk portion (11) having a bolt insertion hole (10) (10) through which a tightening bolt (41) for mounting an automobile wheel is inserted and formed of a magnesium alloy, and the disk portion (11)
An automobile wheel including a corrosion prevention plate (21) made of an aluminum alloy adhered to a portion corresponding to a disc mounting surface (30) of an automobile body with an adhesive on the back surface of the automobile body, wherein the adhesive is The disk part (11) and the corrosion prevention plate (2
1) has a shape in which the internal stress is minimized when the disk is distorted by being tightened to the disk mounting surface (30) with the tightening bolt (41) and the tightening nut (44). "

According to the third aspect of the present invention, the vehicle wheel is tightened and fixed to the disk mounting surface (30) with the tightening bolts (41) and the tightening nuts (44). When the prevention plate (21) is distorted, excessive internal stress does not act on the adhesive structure interposed between the disk portion (11) and the corrosion prevention plate (21), and the elasticity of the adhesive decreases over time. Even harder to break.

According to a fourth aspect of the present invention, in the third aspect, "the corrosion prevention plate (21) is fitted externally to a hub (31) projecting from the disk mounting surface of the vehicle body and An aluminum alloy cylinder (25) inserted into a hub hole (14) formed in the disk portion (11) is continuously provided. ''
The outer periphery of the hub (31) is made of aluminum alloy
Since it is surrounded by (25), it is possible to prevent electrolytic corrosion caused by rainwater entering between the iron hub (31) and the magnesium alloy disk (11).

[0014]

As described above, according to the first to fourth aspects of the present invention, since the adhesive at the boundary between the disk portion (11) and the corrosion prevention plate (21) is hardly damaged, it can be used for a long time. However, rainwater hardly penetrates between the disk portion (11) and the corrosion prevention plate (21), and the automobile wheel is hardly damaged for a long time.

Further, since the adhesive is not easily damaged, the inconvenience that the damaged portion of the adhesive falls off and the fastening nuts (44) are loosened is reduced. According to the invention of claim 4, since the outer periphery of the hub (31) is surrounded by the aluminum alloy cylinder (25), the rainwater is interposed between the iron hub (31) and the magnesium alloy disk (11). Can prevent electrolytic corrosion caused by intrusion.

[0016]

Next, an embodiment of the present invention will be described. FIG. 1 is a partially cutaway sectional view of a vehicle wheel according to an embodiment of the present invention, in which a wheel body (1) made of a magnesium alloy and a corrosion prevention plate made of an aluminum alloy adhered to the center of the back surface thereof. (21).

The disk unit (1) constituting the wheel body (1)
A rim portion (12) is provided around the outer periphery of (1), and a hub hole (14) is formed in the center of the disc portion (11). In the portion surrounding the hub hole (14) in the disk portion (11), a central tube (16) projects to the front side, and the central tube (16)
The center cover (15) for makeup is fitted on the outside,
The center cover (15) is fixed to the hub hole (14) with a center cap (17) screwed into a screw engraved on the outer periphery of the distal end of the center tube (16).

The central tube (16) which is the front of the disk portion (11)
An annular concave portion (18) is formed in a portion surrounding the hole, and four bolt insertion holes (10) (10) are formed in the annular concave portion (18). On the back surface of the disk portion (11), a columnar ridge having an outer diameter larger than the outer diameter of the annular concave portion (18).
(111) protrude, and a corrosion prevention plate (21) is adhered to the columnar ridge (111). The wheel body (1) comprising the disk part (11) and the rim part (12) is provided with a corrosion prevention plate (2).
The coating is applied except for the top surface of the columnar ridge (111) facing 1), thereby preventing corrosion.

The corrosion prevention plate (21) includes a ring main body (20) formed of an annular flat plate, a cylindrical body (25) protruding from the inner periphery into the hub hole (14) of the disk portion (11), An annular standing piece (27) that bends from the outer periphery of the ring main body (20) toward the disk portion (11).
The inner diameter of the ring-shaped upright piece (27) is set to be slightly larger than the outer diameter of the columnar protrusion (111) on the back surface of the disk (11). The thickness of the corrosion prevention plate (21) is set to about 0.5 mm in this embodiment. The ring main body (20) has bolt insertion holes (10) (10) in the disc portion (11).
Bolt insertion portions (23) and (23) are drilled at positions that match the bolt insertion portions (23) and (23) and the bolt insertion holes (10) and (1).
Tightening bolts (41) (41) described later are inserted into 0).

The boundary between the corrosion preventing plate (21) and the disk portion (11) is adhered with an elastic adhesive containing silicon resin or silicone rubber (hereinafter referred to as a silicon-based adhesive). . Next, a method of manufacturing the above-described vehicle wheel will be described. FIG. 2 is a diagram illustrating an operation of assembling the vehicle wheel according to the embodiment of the present invention.

An undried silicon-based adhesive is applied to the upper surface of the corrosion prevention plate (21).
Place 1) on the jig (6) which is the work surface. At this time, the bolt insertion portions (23) and (23) of the corrosion prevention plate (21) are externally inserted into the four bolts (61) and (61) projecting from the upper surface of the jig (6). Then
The tips of the bolts (61) (61) penetrate the bolt insertion portions (23) (23) and protrude further upward.

Next, a corrosion prevention plate to which an adhesive is applied
The columnar protruding portion (111) of the disk portion (11) is superimposed on the upper surface of (21). That is, the disk part (11) and the corrosion prevention plate (2
From the side of the corrosion prevention plate (21), place the jig as the work surface
(6) It is in a state of contact with the upper surface. At this time,
The bolts (61) (61) projecting from the bolt insertion portions (23) (23) of the corrosion prevention plate (21) are inserted into the bolt insertion holes of the disk portion (11).
(10) Extrapolate (10). Thereafter, as shown in FIG. 3, tightening nuts (62) and (62) are screwed to the tips of the bolts (61) and (61). Then, the tightening nut (62) (6) with a tightening force equal to or greater than the tightening force of the tightening bolt for tightening the vehicle wheel to the wheel mounting surface of the vehicle body.
2) Tighten. That is, the aggregate of the disk portion (11) and the corrosion prevention plate (21) is held in a distorted shape in a state of being mounted on the disk mounting surface (30).

Then, the undried adhesive applied to the upper surface of the corrosion prevention plate (21) is applied to the column-shaped protrusion (11) of the disk portion (11).
The adhesive protrudes from the outer periphery of 1) and remains as an adhesive reservoir (A) in the gap between the pillar-shaped protruding portion (111) and the standing piece (27) on the outer periphery of the corrosion prevention plate (21) (see FIG. 3). Therefore, the adhesive pool (A)
By this, rainwater can be reliably prevented from entering the boundary between the corrosion prevention plate (21) and the disk portion (11) from the outer periphery of the corrosion prevention plate (21).

When the tightening nuts (62) and (62) are tightened, the wall of the disk portion (11) near the bolt insertion holes (10) and (10) comes into direct contact with the corrosion prevention plate (21), Hole (10) (1
0), the disk part (11) and the corrosion prevention plate
The degree of adhesion of (21) decreases, and the gap formed between them gradually increases as the distance from the bolt insertion holes (10) (10) increases. Fig. 4 shows the disk part (11) and the corrosion prevention plate (21)
Are exaggerated to show the spatial change of the mutual gaps. As shown in the figure, the gap between the disk portion (11) and the corrosion prevention plate (21) gradually increases as the distance from the bolt insertion hole (10) of the disk portion (11) increases. Also becomes thicker as the distance from the bolt insertion hole (10) of the disk portion (11) increases. According to the test results, the adhesive (5
The thickness of 1) is “0” near the bolt insertion hole (10),
The outer peripheral portion of the corrosion prevention plate (21) corresponding to the intermediate portion between the adjacent bolt insertion holes (10) (10) was about 0.1 mm.

When the adhesive (51) is naturally dried and solidified by being left in the above-mentioned tightened state, the corrosion preventing plate (21) and the disk portion (11) have elasticity (5).
It becomes a connected state via 1). Then tighten the nut
(62) Remove (62), remove the car wheel with the corrosion prevention plate (21) attached to the back from the jig (6), and attach the center cover (15) and center cap (17). And FIG.
Is completed.

In this case, since the upstanding piece (27) bent toward the disk portion (11) is formed on the outer periphery of the corrosion prevention plate (21), the thickness of the corrosion prevention plate (21) is small. However, there is less concern that the operator's hand may be injured by touching the outer periphery of the corrosion prevention plate (21). In addition, the standing piece (27) bent toward the disk (11) side
Is formed, so that there is less concern that an obstacle will be caught on the outer peripheral edge of the corrosion prevention plate (21) and will be peeled off.

Next, the operation of mounting the above-described vehicle wheel will be described. First, the center cap (17) and the center cover (15) are removed from the state shown in FIG. Next, the hub (31) is inserted into the cylindrical body (25) of the corrosion prevention plate (21), and the four fastening bolts (41) (41) protruding from the disk mounting surface (30) of the vehicle body. Then, extrapolate the bolt insertion hole (10) and the bolt insertion part (23) of the disk part (11) and the corrosion prevention plate (21),
Tightening nuts (44) (44) are screwed into the tips of the tightening bolts (41) (41) and tightened. Then, the disk portion (11) and the corrosion prevention plate (21) are slightly distorted due to the tightening of the tightening nuts (44) and (44), and the shape of the disk portion (11) and the corrosion prevention plate (21) when distorted. During these bonding operations, the bolts (61) and (61) of the jig (6)
And the distortion shape of the disk portion (11) and the like when the tightening nuts (62) and (62) are tightened. Therefore,
After mounting on the disc mounting surface (30) of the car body, the adhesive (5) located between the corrosion prevention plate (21) and the disc part (11)
The internal stress in the tissue of 1) is minimized, and no excessive stress is applied to the tissue, and the adhesive (51) is hardly damaged.
After mounting the wheel body (1) on the disc mounting surface (30), the center cover (15) is fitted over the center tube (16), and the center cap (17) is screwed onto the center tube (16). Then, as shown in FIG. 5, the vehicle wheel is mounted on the disc mounting surface (30) of the vehicle body.

In the above embodiment, the disk portion (11) mounted on the jig (6) is tightened with the tightening nuts (62) (62) so that the disk portion (11) has the same shape as when mounted on the vehicle. 11) etc. were distorted, but the upper surface of the disk part (11) attached to the jig (6) was pressed with a hydraulic cylinder at the bolts (61) and (61), and the adhesive (51) may be dried and solidified.

[Brief description of the drawings]

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

FIG. 2 is an explanatory view of an assembling operation of an automobile wheel appearing in FIG. 1;

FIG. 3 is an explanatory view of the assembling work of the automobile wheel appearing in FIG. 1;

FIG. 4 is a partially enlarged view of a bolt insertion hole (10) in FIG. 3;

FIG. 5 is a partial cross-sectional view showing a state where the vehicle wheel of FIG. 1 is mounted on a disk mounting surface of the vehicle.

FIG. 6 is an explanatory view of a conventional example.

FIG. 7 is an explanatory view of a conventional example.

[Explanation of symbols]

 (10) ・ ・ ・ Bolt insertion hole (11) ・ ・ ・ Disk part (21) ・ ・ ・ Corrosion prevention plate (30) ・ ・ ・ Disk mounting surface (41) ・ ・ ・ Tightening bolt (44) ・ ・ ・Tightening nut

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B60B 3/00 B60B 7/00 B60B 27/00

Claims (5)

(57) [Claims] 1. A fastening bolt for mounting an automobile wheel.
A disk portion (11) having a bolt insertion hole (10) (10) through which the (41) is inserted and made of a magnesium alloy, and a disk mounting surface ( 30) A method for manufacturing an automobile wheel, comprising a corrosion prevention plate (21) made of an aluminum alloy bonded to a portion corresponding to (30) with an elastic adhesive, wherein the corrosion prevention plate (21) and the disc portion are provided. These corrosion prevention plates (21) with the undried adhesive interposed at the boundary of (11)
And a step of superposing the disk part (11), and an assembly of the disk part (11) and the corrosion prevention plate (21),
Drying the adhesive while holding the disk in a distorted shape with the disk mounted on the disk mounting surface (30). 2. A fastening bolt for mounting an automobile wheel.
A disk portion (11) having a bolt insertion hole (10) (10) through which the (41) is inserted and made of a magnesium alloy, and a disk mounting surface ( 30) A method for manufacturing an automobile wheel, comprising a corrosion prevention plate (21) made of an aluminum alloy bonded to a portion corresponding to (30) with an elastic adhesive, wherein the corrosion prevention plate (21) and the disc portion are provided. These corrosion prevention plates (21) with the undried adhesive interposed at the boundary of (11)
And a step of superposing the disk part (11), and an assembly of the disk part (11) and the corrosion prevention plate (21),
A step of bringing the plate into contact with the work surface from the corrosion prevention plate (21) side, and keeping the bolt insertion hole (10) portion of the disc portion (11) pressed against the work surface. Drying the adhesive, the pressing force on the work surface, when the disk (11) is mounted on the disk mounting surface (30), the tightening nut (41) to the tightening bolt (41). 44) A method of manufacturing an automobile wheel set to a magnitude equal to the tightening force of 44). 3. A fastening bolt for mounting an automobile wheel.
A disk portion (11) having a bolt insertion hole (10) (10) through which the (41) is inserted and made of a magnesium alloy, and a disk mounting surface ( 30) An automobile wheel including a corrosion prevention plate (21) made of an aluminum alloy adhered to a portion corresponding to (30) with an elastic adhesive, wherein the adhesive comprises the disk portion (11) and the corrosion Prevention plate
(21) is tightened to the disk mounting surface (30) with a tightening bolt (41) and a tightening nut (44) and has a solidified shape in which the internal stress is minimized in a distorted shape. wheel. 4. A hub hole (14) formed in the disk portion (11) and externally fitted to a hub (31) protruding from the disk mounting surface of the vehicle body in the corrosion prevention plate (21). 4. The vehicle wheel according to claim 3, wherein a cylindrical body (25) made of an aluminum alloy is inserted in the cylindrical body. 5. A disk portion (1) is provided on the outer periphery of the corrosion prevention plate (21).
The vehicle wheel according to claim 3 or 4, wherein an upstanding piece (27) bent to the 1) side is provided around.