JPH05146861A - Production of wheel for vehicle - Google Patents

Abstract

PURPOSE:To keep a feeder head part to an irreducible minimum and to reduce this supplemental molten metal quantity by pouring the molten metal from a pouring hole arranged near a connecting part of cylindrical rims with a round plate-like disk part in the inclining condition of the cylindrical rim from the perpendicular direction. CONSTITUTION:At first, a metallic mold 1 is put to the horizontal condition and while rotating the metallic mold 1, the molten metal is poured in a cavity 7 from the pouring hole 9. The molten metal flowed into the cavity 7 from the pouring hole 9 is stored from the bottom part of the inclined cavity 7 in order and started to solidify. Then, at last, the molten metal is filled up near the feeder head part 10 and the pouring of the molten metal from the pouring hole 9 is completed and the molten metal near the feeder head 10 is solidified. Therefore, as the quantity of the feeder head part 10 can be reduced and the molten metal quantity flowed in the mold is reduced, the rising of the mold temp. is restrained and the solidified time of the molten metal can be shortened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle wheel manufacturing method.

[0002]

2. Description of the Related Art A vehicle wheel formed of a cylindrical rim and a disk-shaped disc portion, which is displaced in one direction of the cylindrical rim and is arranged on one side in the cylindrical direction, is cast with a mold. As an example of a manufacturing method, a method using a mold as shown in FIG. 5 is known. In the figure, 100 is a mold, 101
Is an upper mold, 102 is a lower mold, 103 is a cavity, 104
Is a pouring port, 105 is a runner, and the cavity 10
103a of 3 is a portion corresponding to the rim of the wheel, 1
Reference numeral 03b indicates a portion corresponding to the disk. In order to cast a vehicle wheel using such a mold 100, a molten metal is poured into the runner 105, the molten metal is put into the cavity 103 from the pouring port 104, and the molten metal is solidified. To do. By the way, in order to prevent shrinkage cavities or the like in the product when the molten metal solidifies, a plurality of feeders 106a ... And a wheel mounting portion at the center of the disc-shaped disc 103b are arranged along the circumference of the rim 103a of the mold 100. Each of the feeders 106b is provided.

[0003]

However, in such a manufacturing method, a plurality of feeders 106 are provided along the circumference of the rim 103a of the mold 100, that is, over the entire circumference of the cylindrical rim 103a. Therefore, since the feeder section 106 is provided, the amount of feeder increases, and accordingly, the time for the molten metal to solidify increases and the manufacturing time of the vehicle wheel also increases.

[0004]

In order to solve the above problems, the present invention is directed to a cylindrical rim and a cylinder rim that is substantially orthogonal to the center line of the cylindrical rim in the cylinder direction and is biased to one side of the cylinder rim in the cylinder direction. In a method for manufacturing a vehicle wheel integrally gravity-casting a vehicle wheel composed of a disc-shaped disc portion that is coupled in a position, the disc-shaped disc portion is below a cylindrical rim, and In a state where the cylindrical rim is inclined from the vertical direction, the vehicle wheel is gravity cast by pouring from a pouring port provided in the vicinity of the coupling portion of the disc-shaped disc portion of the cylindrical rim. To do.

[0005]

[Function] Since the disc-shaped rim is inclined from the vertical, the pouring is performed from the pouring port provided in the vicinity of the coupling portion of the disc-shaped disc portion of the cylindrical rim. The rims are sequentially filled, and from the lower rim to the upper, that is,
It solidifies toward the feeder part, and finally it solidifies on the feeder part side. Therefore, the feeder unit can be minimized, the amount of the supplementary molten metal can be reduced, and the solidification time can be shortened.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a side view of a vehicle wheel casting mold, in which 1 is a mold, 2 is a lower mold, 3 is an upper mold,
Reference numeral 4 denotes a horizontal mold, and the mold 1 is configured to be rotatable around a fulcrum 5, and in a normal state is horizontal as shown by an imaginary line, but can be rotated up to a vertical state as shown by a solid line. It has become. A cavity 7 for forming a vehicle wheel is formed between the lower mold 2, the upper mold 3, and the horizontal mold 4. In the figure, 7a is a cylindrical shape corresponding to the rim of the vehicle wheel. 7b indicates a plate-shaped portion corresponding to the disk-shaped disc of the vehicle wheel. The horizontal mold 4 is provided with one pouring port 9 and one pouring unit 10, and the pouring port 9 is provided in the vicinity of the disc section 7b of the rim section 7a. Place on the open side.

Casting a vehicle wheel using the above-mentioned mold is performed as follows. First, the mold 1 is placed in a horizontal state, that is, the state of the imaginary line in FIG.
While rotating in the direction of A in FIG. 1, the molten metal is poured into the cavity 7 from the pouring port 9. The molten metal that has flowed into the cavity 7 from the pouring port 9 sequentially accumulates from the bottom of the inclined cavity 7 as shown in FIGS. 2A, 2B, 2C, 2D, and 3E, and begins to solidify. Finally, the molten metal is filled in the vicinity of the feeder 10 to finish pouring from the pouring port 9, and the molten metal in the vicinity of the feeder 10 is solidified.

In the above, according to this embodiment, since the molten metal is finally solidified in the vicinity of the feeder portion 10, the amount of the feeder portion 10 can be reduced and the amount of molten metal flowing into the mold is also reduced. Therefore, the rise of the mold temperature can be suppressed, and the solidification time of the molten metal can be shortened. Also, from the pouring port 9 to the cavity 7
Since the molten metal that has flowed into the chamber is accumulated from the bottom of the cavity 7 in sequence, the air in the mold 1 and the molten metal can be smoothly replaced. Therefore, it is possible to eliminate the riser 106b of the wheel mounting portion in the center of the disk 103b shown in FIG. Further, at this time, since the molten metal flowing toward the bottom of the cavity 7 has a longer flow path than the molten metal above this and the temperature drop is large, directional solidification of the molten metal is possible.

FIG. 3 shows another embodiment. In this embodiment,
First, the mold 1 was tilted downward from the horizontal by 20 degrees, the molten metal was poured while rotating the mold 1, and finally the mold 1 was set in a vertical state. According to such a method, it is possible to smoothly fill the molten metal when the shape of the wheel is complicated. FIG. 4 shows still another embodiment. In this embodiment, the mold 1 is tilted and fixed with respect to the horizontal in the range of 30 to 75 degrees, and the molten metal is gently poured. In this example, the best product was obtained when the mold angle was in the range of 45 to 70 degrees.

[0010]

As described above, according to the present invention, pouring is performed from the pouring port provided in the vicinity of the coupling portion of the disc-shaped disc portion of the cylindrical rim with the disc-shaped rim inclined from the vertical. Therefore, the molten metal is sequentially filled from the pouring port to the rim through the disc portion, solidifies from the lower rim toward the upper part, that is, toward the feeder part, and finally at the feeder part side. Therefore, the feeder unit can be minimized, the amount of the supplementary molten metal can be reduced, and the solidification time can be shortened.

[Brief description of drawings]

1] Side view of mold

FIG. 2 is a side view of a mold showing a molten metal injection state.

FIG. 3 is a side view of a mold according to another embodiment.

FIG. 4 is a side view of a mold according to still another embodiment.

FIG. 5: Side view of a conventional mold

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Mold, 7 ... Vehicle wheel, 7a ... Cylindrical rim, 7
b disk-shaped disc portion, 9 ... pouring port, 10 ... feeder portion.

Claims (1)

[Claims] 1. A cylindrical rim, and a disc-shaped disc portion that is substantially orthogonal to a center line of the cylindrical rim in the cylinder direction and is offset and coupled to one side of the cylindrical rim in the cylinder direction. In a method of manufacturing a vehicle wheel in which a vehicle wheel is integrally gravity-cast, the disc-shaped disc portion is below a cylindrical rim, and the cylindrical rim is inclined from a vertical direction,
A method for manufacturing a vehicle wheel, characterized in that the vehicle wheel is gravity-cast by pouring from a pouring port provided in the vicinity of a coupling portion of the cylindrical rim with the disc-shaped disc portion.