JPH076990Y2 - Vehicle wheel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a vehicle wheel, particularly a vehicle wheel made of forged aluminum or aluminum alloy.

[Conventional technology]

As the vehicle wheel, there is a vehicle wheel formed by combining forging and ironing with a spinning machine, an example of which is shown in FIG.

First, the raw material W shown in FIG. 7A is forged to form the rough material 50 shown in FIG. The rough material 50 includes a central disk portion 51 and a peripheral flange rough portion 52. Then, after annealing to remove the internal stress, if necessary, the rough flange portion 52
Machined the inner and outer surfaces and end surfaces of
Move on to the spinning process.

In the spinning machine, first, the peripheral flange rough shape portion 52 is cleaved (c in the same figure), and branched into a front flange rough shape portion 53 and a rear flange rough shape portion 54.

Then, if necessary, anneal the rear flange rough portion 54
Since the molding volume is smaller than that of the above, the front flange rough portion 53 is cut into a predetermined length by machining (d in the figure). After that, ironing is performed again by a spinning machine as shown in (e) of the figure to form a front flange portion 55, a rear flange portion 56, and a center drop portion between them, and after heat treatment, mounting holes 57, screw holes 58 and tires are formed. The outer peripheral portion including the mounting surface 59 is subjected to cutting and finishing to complete (f in the same figure).

In another conventional method shown in FIG. 3, since the forging material W, FIG. 3a, is an agglomerate except for the inner side, that is, the roughened front flange portion 53, it is annealed and then first spun into a brim as shown in FIG. The rear flange rough portion 54 is formed by extrusion, flaring is then performed by spinning as shown in FIG. 3c, annealing is performed again, and then finishing spinning is required, which results in an increase in man-hours. . That is, it is easy to form a cylindrical shape by spinning, but ironing spinning in the direction of increasing the diameter in a taper shape is difficult due to the material flow (metal flow). Therefore, it is customary to perform flare processing as an intermediate step, and then perform finish spinning processing after annealing.

[Problems to be solved by the device]

In the case of the first manufacturing apparatus described above, it is difficult to make the front flange rough-formed portion 53 formed by the cleaving process to have a predetermined volume, and as described above, machining is performed to cut to a predetermined volume. Further, it is difficult to iron the rear flange rough portion 54 to a predetermined finishing size by a spinning machine, and it is necessary to anneal after performing flare processing, which requires a lot of man-hours and considerable troubles. .

In view of this point, the present invention has an object to provide a vehicle wheel that simplifies the process, facilitates ironing by a spinning machine, and does not impair the metal flow.

[Means for Solving the Problems]

The vehicle wheel of the present invention for achieving the above object is
By forging, the central disk portion, a small front flange rough portion that is located on the peripheral edge of the central disk portion and protrudes upward, and the front flange rough portion that is located below the rough portion and protrudes downward, and is ironed into a predetermined rim shape. To have the required volume,
Determine the length and wall thickness, and use a rough shaped material that has a long rear flange rough shaped part with the lower skirt expanded to the same shape as flared processing to facilitate ironing. , The front flange rough shape portion and the rear flange rough shape portion are ironed by a spinning machine to form a predetermined front flange portion and rear flange portion, and between the front flange portion and the rear flange portion. It is formed by forming a recessed center drop portion.

[Operation] Since the rough front flange portion, the center drop portion, and the rear flange rough portion are formed by forging, it is possible to have a substantially predetermined volume, and the rear flange rough portion is formed by ironing downward. For the sake of simplification, since the flared shape is similar to the flared shape and the lower hem is widened, the material flow is smooth and the ironing is easy.

〔Example〕

FIG. 1 shows a molding process of a vehicle wheel of the present invention. First, the raw material W shown in FIG. 2 (a) is forged to form the rough material 1 shown in FIG. 1 (a). This rough material 1 has a short front flange rough portion 3 on the outer periphery of the central disc portion 2.
And the elongated rear flange rough portion 4 are formed by projecting vertically. The central disk portion 2 has a fitting hole lower hole 5 and a screw hole perforated portion 6 formed in the central portion thereof, and if necessary, a recessed portion 7 for reducing the weight.

The front flange rough shape portion 3 and the rear flange rough shape portion 4 are determined in length and wall thickness so as to have a required volume for ironing into a predetermined rim shape. In order to facilitate molding, the lower skirt is expanded and formed in the same shape as the conventional flare processing.

Next, if necessary, annealing is performed, and then spinning is performed. In this spinning process, a forming roll is pressed against the roughened front flange portion 3 and the roughened rear flange portion 4, and ironing is performed by a well-known means to obtain the shape shown in FIG. That is, the front flange portion 10 on the inner side, the center drop portion 11, and the rear flange portion 16 on the outer side formed by the spinning process are formed by a spinning process in one process as close as possible to the finished shape.

Then, after heat treatment is carried out if necessary, a fitting hole 12 and a screw hole 13 are bored by cutting, and tire contact surfaces 14 and 15 are finish-cut to obtain a product A.

[Effect of device]

As described above, the vehicle wheel of the present invention is formed by the forging machine, the central disk portion, the short and small front flange rough portion which is located on the peripheral edge of the central disc portion, and which is projected upward, and is located below the rough shaped portion and is projected downward. In addition, a rough shape material consisting of a relatively long rear flange rough shape portion is formed, a forming roll is pressed against this rough shape material by a spinning machine, and a front flange portion and a rear flange portion of a predetermined shape are formed by ironing. In order to make it easier to iron the rear flange rough part during forging, the lower hem is widened to the same shape as flared and the required length Therefore, it is difficult to perform the spinning process, and the process of increasing the diameter in a taper shape, which is likely to be damaged, is formed by forging instead of the spinning process. Because the way, the rear flange portion in the normal ironing can be formed without damaging the metal flow, the time required for machining, it is possible to increase the durability of the product.

[Brief description of drawings]

FIG. 1 is a process diagram of machining a vehicle wheel of the present invention, and FIG.
FIG. 3 and FIG. 3 are process diagrams of a manufacturing method of a conventional example. Reference numeral 1 is a rough material, 2 is a central disk portion, 3 is a rough front flange portion, 4 is a rough rear flange portion, 10 is a front flange portion, 11 is a center drop portion, and 16 is a rear flange portion.

Claims (1)

[Scope of utility model registration request] 1. A center disk portion by forging, a short front flange rough-shaped portion which is located on the peripheral edge of the central disk portion and projects upward, a front flange rough-shaped portion which is located below the rough-shaped portion and which projects downward, and has a predetermined rim. A long rear with the lower hem expanded to the same shape as the length and wall thickness determined so that it has the required volume to be ironed into a shape, and flared to facilitate ironing. A rough material having a rough flange portion is formed into a predetermined front flange portion and rear flange portion by ironing the front flange rough portion and the rear flange rough portion with a spinning machine. At the same time, a vehicle wheel characterized in that a recessed center drop portion is formed between the front flange portion and the rear flange portion.