JPS5856659B2 - Method of manufacturing automotive foil - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the manufacture of automotive foils, and more particularly to a method of manufacturing aluminum alloy automotive foils.

Automotive foils made of aluminum alloy seek to gradually reduce the unsprung load, making them lightweight and contributing to improved running and maneuverability as well as fuel savings, but they are expensive and are used more for hobby purposes than for practical use. The reality is that this is the case.

The high cost of conventional products is due to the fact that they are cast products, which requires a long processing time from heating and liquefying the aluminum to injection molding, and because the use of liquefied aluminum causes the casting mold to fatigue quickly. This is one of the reasons why mass production is difficult.

The present invention aims to provide a manufacturing method that enables production at low cost by reducing equipment costs and mold costs mainly through cold forging.

Next, a specific example of the present invention will be explained with reference to illustrated manufacturing process diagrams.

In Figures 1 and 2, 1 and 2 are both aluminum alloy materials, 1 is a round bar cut to the required size, 2 is an extruded material cut to the required size, or a cold forged material. It is.

The inner rim member 3, the outer rim member 4, and the wheel mounting member 503 are simultaneously formed by cold forging the material (Fig. 3), and the center portion of the wheel mounting member 5 is further processed to create extra thickness at the center. Stretch it to form a thick part 5a (Fig. 4) to prepare for the insertion of the shaft.

In FIG. 5, 6 is a shaft hole formed in the thick portion 5a of the wheel attachment member 5.

Next, a shaft insertion portion 7 protruding toward the outer rim member 4 is formed in the thick portion of the foil attachment member 5 (FIG. 6).

Next, the open portion of the outer rim member 4 is pushed outward, and the peripheral edge of the end portion is bent outward to form the intermediate shape 8 of the outer rim (Fig. 7), and the body portion 8a is further pushed out to the outside of the rim. The side surface 9 and the flange 10 are formed (FIG. 8).

FIG. 9 shows a completed product of the outer rim, and the shaft insertion portion 7 and the flange 10 are finished, and the processing of the outer rim is completed to obtain an intermediate product 11.

The process described above is performed by forging the outer rim, inner rim members, and wheel mounting members.

Drawings of the molds used for these processes are all omitted.

FIGS. 10 and 11 show an apparatus for processing an inner rim member.

FIG. 10 shows a pressurized roll device for processing the inner rim member 3, in which 12 is a rotating bed, and 13 is a rotating slide, both of which are connected to a rotating device and are rotatably installed.

Reference numeral 14.14 denotes four pressure rolls arranged around the lowered position of the rotary slide 13, which are installed so as to be rotatable and movable in a direction orthogonal to the axial direction. Machining the inner rim member.

The outer rim surface 9 of the intermediate force product 11 is placed on a rotating bed 12.
, with the inner rim member 3 facing upward.

Next, when the rotating slide 13 is lowered and the rotating portion is press-fitted into the inner rim member, the opening of the member is expanded by the stepped portion 13a of the slide, and the slide further descends until the tip reaches the foil attachment member 5 (the first Figure 10B).

In FIG. 10B, the rotating bed 12 and the rotating slide 13 are rotated at the same circumferential speed to rotate the intermediate product 11, and the pressure roll 1
4. While rotating 14, move toward the rotating slide 13 that has already descended, pressurize the inner rim member 3, and force-form the inner rim according to the shape obtained by the slide and roll (11th figure).

After advancing the pressure roll 14.14 to a predetermined dimension, the roll is moved back and the rotation of the rotating bed 120 is stopped.

Next, the rotating slide 13 is raised, and the tightening device of the rotating bed is further loosened to take out the product 15.

A rib portion 17 and a flange 16 are formed at the opening on the inner rim of the product.

As explained above, the method for manufacturing automotive foils of the present invention is mainly manufactured by cold forging, so that products with the same precision as cutting accuracy can be obtained, the weave direction can be made uniform, and cutting edges can be This has the effect of making the appearance more beautiful.

Furthermore, it has the characteristic of being able to be manufactured at a low cost because plastic working and cutting can be performed simultaneously and other incidental equipment can be saved.

[Brief explanation of drawings]

Figure 1 shows a round bar made of aluminum alloy cut to the required dimensions. Figure 2 shows an extruded aluminum alloy material cut to the required dimensions or a forged punched material cut to the required dimensions. FIG. 3 is a first process diagram of forming the inner rim member, outer rim member, and foil attachment member from the raw material. Figure 4 is the second process diagram. Figure 5 is the third process diagram. FIG. 6 is a diagram showing the final process of forming the foil attachment member. FIG. 7 is a first process diagram for forming the outer rim. Figure 8 is the second process diagram. FIG. 9 is a plan view and a sectional view of an intermediate product with an outer rim formed thereon. FIG. 10 shows an apparatus for roll-forming the inner rim member, in which A is a plan view and B is a side view. FIG. 11 shows the inner rim member being molded, with A being a plan view and B being a side view. FIG. 12 is a perspective view of the product. 1...Material, 2...
...Material, 3...Inner rim member, 4...
... Outer rim member, 5... Wheel mounting member,
6...Shaft hole, 7...Shaft insertion part,
8...Intermediate shape, 9...Rim outer surface,
10... Flange, 11... Intermediate force Roe product, 12... Rotating head, 13...
... Rotating slide, 14 ... Pressure roll,
15...product, 16...rep part, 17
...Flange.

Claims (1)

[Claims] 1 An aluminum alloy is used, and each manufacturing process is processed by cold forging, where a cylindrical inner rim member and an outer rim member are formed from a hollow material, and then a boundary portion between the inner rim member and the outer rim member is formed. After forming a foil attachment part on the inside of the wheel attachment member and forming a shaft insertion hole in the foil attachment member, a flange is formed by stretching the opening edge of the outer rim member and bending the end periphery outward, and then Next, the product being processed is supported by a rotating bed and a rotating slide, and a plurality of pressure rolls disposed around the product are pressurized toward the center of the product to form an inner rim. How to make foil for