JPS60127040A - Working method of aluminum wheel - Google Patents

Abstract

PURPOSE:To make window forming quickly and easily by working and forming the part of a disk where window holes are to be made preliminarily when forming a required disk part by forging a billet. CONSTITUTION:A discoid body 4 provided with a center boss part 1, a flat plate part 2 and a thick outer peripheral part 3 is formed by rough forging an aluminum wheel billet. Then, a center boss part 1a of finished shape, a plate part 2a in which bulging recessed hole-like window holes 5 are scattered all over the surface and an edge part 3a are formed simultaneously by finish forging to form a finished formed body 6. After removing by cutting bulged bottoms 5a of the window holes 5 by a cutting tool 7, inner peripheral edge of completely opened window holes 5b is chamfered to make an objective formed body 9. Thus, efficient production of aluminum wheels is made possible.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method that greatly facilitates window hole processing in the disc S when producing an aluminum wheel by forging, thereby enabling efficient production of the aluminum wheel.

The technology for producing lightweight wheels made of aluminum alloy material by forging is well known, as can be seen in six examples such as JP-A-50-8201 and JP-A-55-T44350. The former in the above-mentioned known example is one in which the disk part and the ring part are separated, and the disk part obtained by forging and the ring part obtained by press working are bolted together and integrated, and the latter is a disc part and a ring part obtained by dividing and bolted together. The ring part and the ring part are integrally formed by forging.

Where do these aluminum wheels smell?1. The disk portion has window holes of various shapes that correspond to conventional spoke holes, which require processing, and there are many window holes that exist over the entire surface of the disk portion.

-Drilling the required shape by milling, for example, is extremely troublesome and requires a long processing time and effort. This is where simplification is required.

The present invention makes it possible to manufacture aluminum wheels by such forging process, and the perforation process can be carried out extremely easily by using forging means. In the process of forming the disc part or the disc part and the ring part, by preliminarily processing and forming the required window hole part in the disc part, the subsequent window opening can be quickly processed using a lathe etc. Therefore, its characteristics are the process of forging aluminum wheel material into a disk shape with a thick outer periphery, and the process of forging the formed material into the desired shape of edges and recesses. A step of forging a ring portion that is integrally continuous with the disk portion, and a window hole formed in a recessed hole shape in the molded material. The present invention includes the steps of opening a window hole by cutting and removing the bottom of the window hole, and chamfering the edge of the ridge of the window hole.

Hereinafter, the present invention will be described in detail based on the illustrated embodiments. Fig. 1 (1) to Fig. 1 (1) is an example of the present invention. This is an embodiment applied to a quiz aluminum wheel which is formed into a shape and integrated after the fact. Using upper and lower forging dies, etc. in the same way as the forging means, the center boss part fi+ is formed.

The disc-shaped molded body (4) with a flat plate part f2i and a thick walled edge (3) is completely forged, and the aluminum wheel material is not a casing but a disc-shaped body with a constant wall thickness. It is the material. FIG. 1 (Lll shows the vJ2 process according to the present invention, this process is a finish forging process, and the molded body (4) that has completed the first process is given the same shape as the mold surface for the desired finish forging. Using upper and lower forging dies, etc., turn the center boss part +11 into a center boss part (la) with the desired finished shape, and turn the thick outer peripheral edge (3) into an edge part (3a) with the desired finished shape. The flat grate part f2i VC has the same desired finishing shape, and the required window hole formation positions TL are formed by recessed holes projecting from the plate as shown in the figure. The window hole portion (5) is formed by forging into a stamped shape based on the required window hole shape, and (5a) indicates the bottom of the window hole portion (5).

In order to form this smooth concave window hole (5), a concave and convex mold surface for forming the concave hole is partially provided on the opposing grate mold surfaces of the upper and lower forging dies. Of course, the shape of the window hole is free, and any shape can be adopted.
) with a finished shape scattered over the entire surface of the grate (2a
) are the previously mentioned senku boss part (2a) and edge part (3
At the same time as a), a finished molded body (6) is obtained which is forged. Figure 1) shows the sixth process according to the present invention. This process is a window hole opening process. The protruding bottom (5a) of the window hole 515 is cut and removed using the cutting tool (71). Although any cutting device can be used, of course, a lathe or similar cutting device is the simplest and easiest. That is, the bottom (
By cutting out 5a), the window hole portion (5) becomes a completely closed window hole (5b). The fourth step according to the present invention is shown in FIG. The inner periphery of the window hole (5b) is chamfered using the grinding machine, and thus the molded body (9) that is the object of the present invention is completed, that is, the senkuboss part that has the desired shape. (la)
, a disc part is obtained by the plate part (2a) in which the edge part (3) and the window hole (5b) are arranged in rows. In this figure, each window hole (5b) shows an example in which windows of the same shape and size are arranged in a row at regular intervals.
The shape, arrangement, dimensions, etc. of the window holes (5b) in the disk portion (2a) can be set arbitrarily.

Fig. 2 (1) to Fig. 2 (■) are examples in which the present invention is applied to a one-bead squeeze aluminum wheel, that is, a wheel in which the disc part and the ring part are integrally forged.
This is an example, and the processing order from the first step to the fourth step is exactly the same as the embodiment shown in FIG. In the first step shown in Fig. 2 (I), a disc-shaped aluminum wheel material f:, a molded body (4) having a center boss part (1), a grate part ('lf, and an outer wall thickness l?tI edge (3) ) When forging and forming the thick-walled edges (
3) is different from the outer periphery [31 shown in FIG. 1 fl) K in that it includes a ring portion, so that the wall thickness, shape, and dimensions are smaller. The molded body (4) obtained in the first step is shown in FIG. and remove the ring part (3) as shown in the illustration.
b) are integrally forged, and the rest is completely the same as the embodiment shown in FIG.
The formation of the plate part (2a) formed by forging is exactly the same, so the plate part (2a) is formed by forging the plate part (2a).
Figure (For the molded body (6a) obtained in Ill, its window hole part (
The opening made by cutting 15 (5a) in 5) and the chamfering of the opened window hole (5b) are carried out in exactly the same way, and as a result, the required finished shape is obtained as shown in Figure 2 (■). Center boss part (la), edge part (3
a), has a link part (3b) and its play)
The molded body (9a) which is the object of the present invention is obtained, which has the shape of a one-piece aluminum wheel with a large number of window holes (5b) scattered in the portion C2a). Window hole (51) Ii in part (2a)
, shows an example of window holes having different sizes and shapes.

The processing method according to the present invention is as described above.
The most significant feature is that the window hole (5b) on the disk plate surface can be formed extremely quickly and easily. That is, in the present invention, when forging an aluminum wheel material, which is a disc-shaped material, into a target disc shape, which is actually a disc or ring shape, it is roughly forged (by rough forging) (after forming it into the approximate target shape). When finish forging into the shape of the tiff part having the desired size and shape, by overhanging the plate fMSC2a) into the required window hole part (5) in the shape of a concave hole, the shape of many window holes can be easily secured. Moreover, since this is done by Ii forging, it can be obtained at the same time by One Punch-1. By cutting out the bottom of the concave hole formed in this way, the closed concave hole becomes a completely open window hole, and at this time, the bottoms (5a) of these window hole portions 16) are attached to the plate. Department (
2a) can be quickly and easily cut and removed by the N71VC of the VC5 lathe shown in Fig. 1 and Fig. 2. By chamfering the inner eight edges of the thus opened window hole (5b), the complete window hole processing is completed, so it is possible to create a larger number of window holes in that shape than in the past. It is much more efficient than methods such as milling along the edges, and is especially suitable for manufacturing aluminum wheels that require a large number of windows with different sizes and shapes, as shown in the embodiment in Figure 2. By incorporating it into a part of the forging process, productivity can be significantly improved.This makes it possible to easily realize mass production of aluminum wheels with high efficiency and low cost. ``The conventional window maker, which requires a large amount of manual labor, is superior in that it eliminates machining and easily enables mechanical mass production.

[Brief explanation of drawings]

Figures 1 (11 to 1) (■ are explanatory diagrams of the processing steps of the embodiment of the method of the present invention applied to a two-piece aluminum wheel and the finished product, Figure 2 (Il to Figure 2 (Vl is a one-piece aluminum wheel) It is an explanatory view of the processing steps and the finished product of the embodiment of the method of the present invention applied to an aluminum wheel. HI 1a) - Senku boss part, f2i (2a) - =
Brate part, (3)...Thick wall edge, (3a)...
Enno Miyako, (3b)...link part, 1411B) (
6a) (9) (9a)... Molded object, (71...)
(item, (8)...grinder, (5)...window hole part, (5a)...bottom, (5b piece...window hole.To request a patent Kobe Steel, Ltd.)

Claims (1)

[Claims] l. A step of forging aluminum wheel material into a disk shape with a thick outer periphery, and a disk portion having the formed material with an edge portion of a desired shape and a desired window hole portion formed by protruding into a concave hole shape. or a step of forging a ring portion that continues integrally with the disk portion, and a step of opening the window hole by cutting and removing the bottom of the window hole portion formed in the molded material so as to protrude into a recessed hole shape; A method for processing an aluminum wheel, comprising the step of removing the inner edge of an opened window hole.