JPH0631366A - Wheel intermediate material spinning forming and spinning forming method for wheel - Google Patents

Abstract

PURPOSE:To improve the working efficiency for manufacturing a wheel by making the width of a rim raw material cylinder smaller then the width of a rim in a desired rim part. CONSTITUTION:A wheel intermediate material 1 for spinning forming is formed by welding the rim raw material cylinder 4 on the peripheral part of the disk part 2 in a state in which the cylinder 4 is nearly coaxial with the disk part 2. The width of the rim material cylinder 4 is smaller than the width of the rim of the desired rim part. While the outside part of the rim is successively provided on the disk part, only the inside part of the rim is spinning formed by the rim raw material cylinder 4. The wheel intermediate material 1 for spinning forming is provided on a mandrel for spinning forming and the rim part is formed by drawing the material cylinder while rotating the wheel intermediate material around the axial center as a center. Thus, the highly tough rim part is manufactured coaxialy with the disk part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spinning wheel intermediate material and a wheel spinning method.

[0002]

2. Description of the Related Art As a conventional vehicle wheel, as shown in FIG. 3, a disc portion 2 and a rim portion 9 are separately manufactured by casting, forging, or plate molding, and the rim portion 9 is formed around the disc portion 2. There are those that are fitted and fixed on the outside.

[0003]

However, in such a conventional wheel,

(1). When the rim portion is fitted onto the disc portion, pre-processing must be performed in order to match the axes of the rim portion with each other. Therefore, it is difficult to improve the work efficiency of wheel manufacturing.

(2). Since the rim portion is welded to the disc portion,
Distortion due to the heat of welding is generated in the rim portion, and as a result of the work to remove the strain as a post process, it is difficult to improve the work efficiency of wheel manufacturing.

[0006] There is a disadvantage that.

The object of the present invention is to eliminate these disadvantages.

[0008]

In order to achieve the above object, in the spinning forming wheel intermediate material according to the first aspect of the present invention, the rim is formed on the peripheral edge of the disc portion with the axes thereof being substantially the same. In a spinning forming wheel intermediate material in which a material tube is welded, the tube width of the rim material tube is made smaller than the rim width of a desired rim portion.

In the wheel spinning forming method according to the second aspect of the invention, the rim blank is welded to the peripheral edge of the disc with the axial center of the disc being substantially the same, and the tubular width of the rim blank is adjusted. By installing the spinning forming wheel intermediate material smaller than the desired rim width on the spinning forming mandrel and handling the rim material cylinder while rotating the wheel intermediate material around the axis, the rim portion Is formed.

[0010]

Since the spinning forming wheel intermediate material according to the first aspect of the present invention is configured as described above, the rim portion having high toughness is made to have the same axial center as the disc portion by the handling spinning forming. Can be manufactured in
As a result, a wheel having this rim portion can be manufactured.

If a rim outer portion is connected to the disc portion and only the rim inner portion is formed by spinning by the rim material cylinder, a so-called FF type wheel in which the disc portion is offset to the outside exhibits the above effect. It can be manufactured in the ready state.

Further, since the wheel spinning forming method according to the second aspect of the invention is configured as described above, the intermediate material of the first aspect can be effectively used.

If the rim inner portion is formed by handling the rim material cylinder while rotating the wheel intermediate material about the axis, a so-called FF type wheel in which the disc portion is offset to the outside is provided. It can be manufactured in a state where the effect is exhibited.

Further, if the wheel intermediate material is arranged on the well portion molding surface of the mandrel without a gap, it is possible to perform the spinning molding in a stable state.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 1 is a wheel intermediate material, and 2 is a disc portion thereof. Disk part 2 has an axle hole in the center
Having 21. Further, 3 is an outer rim portion integrally molded (cast, for example) with the disc portion 2. Reference numeral 31 is a locking step portion, which is formed at the outer end of the disc portion 2 opposite to the rim. The locking step portion 31 extends circumferentially. Reference numeral 4 denotes a rim material cylinder, which is welded and fixed to the locking stepped portion 31 of the disc portion 2 while being externally fitted thereto. This rim material cylinder 4 is hand-spun and formed into a rim inner portion 41 (see the phantom line in FIG. 2). In addition, this rim material cylinder 4
Is narrower than the width of the spinning molding surface 11.

In FIG. 2, reference numeral 5 is a mandrel, which is rotatably installed around an axis. Reference numeral 51 denotes this spinning molding surface, which is formed on the peripheral surface of the mandrel 5. The spinning molding surface 51 is for molding the inner rim portion 41 of the wheel W. In addition,
Reference numeral 511 is a well portion molding surface that is the shortest diameter portion on the spinning molding surface 51.

Then, as shown in FIG. 2, the wheel intermediate material 1 is installed on the mandrel 5. In this case, the rim material cylinder 4 is arranged on the well molding surface 511 of the spinning molding surface 51 without any gap. In this state,
By rotating the mandrel 5 and thus the wheel intermediate material 1 and handling the rim material cylinder 4 with the pressing tool 6 along the spinning molding surface 51, the tough rim inner portion 41 and thus the wheel W can be obtained.

[0018]

The spinning forming wheel intermediate material according to the first aspect of the present invention is a spinning forming wheel intermediate material in which a rim material cylinder is welded to the peripheral edge of a disk portion with the disk center having substantially the same axis. Since the tube width of the rim material tube is set to be smaller than the rim width of the desired rim section, the rim section having high toughness is manufactured by handling spinning forming with the disk section and the axis center being the same. Therefore, a wheel having this rim portion can be manufactured.

Therefore, if this intermediate material is used, it is not necessary to weld the rim portion and the disk portion unlike the conventional one, even though the rim portion is rich in toughness. Since the centering with the disc part is not necessary and the work of removing the distortion (generated by welding) of the rim part is unnecessary, the work efficiency of wheel manufacturing can be improved as compared with the conventional case.

If a rim outer portion is connected to the disc portion and only the rim inner portion is formed by spinning by the rim material tube, a so-called FF type wheel in which the disc portion is offset to the outside exhibits the above effect. It can be manufactured in the ready state.

Further, it is also possible to connect the rim outer side portion to the disc portion and to spin-form only the rim inner side portion by the rim material cylinder.

In the wheel spinning forming method according to the second aspect of the invention, the rim blank is welded to the peripheral edge of the disc with the axial center of the disc being substantially the same, and the tubular width of the rim blank is adjusted. By installing the spinning forming wheel intermediate material smaller than the desired rim width on the spinning forming mandrel and handling the rim material cylinder while rotating the wheel intermediate material around the axis, the rim portion Is formed.

Further, in the wheel spinning forming method according to the second aspect of the present invention, the rim blank is welded to the peripheral edge of the disc with the axis of the disc being substantially the same, and the width of the rim blank is desired. Install a spinning wheel intermediate material that is smaller than the rim width of the rim on the spinning molding mandrel, and handle the rim material tube while rotating the wheel intermediate material about the axis to remove the rim portion. Since it is formed, the intermediate material of the first invention can be effectively used.

Therefore, by using the wheel spinning forming method according to the second aspect of the present invention, the effect of the intermediate material of the first aspect can be effectively exhibited.

If the inner portion of the rim is formed by handling the rim material cylinder while rotating the wheel intermediate material about the axis, a so-called FF type wheel in which the disc portion is offset to the outside is formed. It can be manufactured in a state where the effect is exhibited.

Further, if the wheel intermediate material is arranged on the well portion molding surface of the mandrel without any gap, it is possible to perform the spinning molding in a stable state.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a wheel rim intermediate material according to the present invention.

FIG. 2 is a cross-sectional view showing a state where the wheel rim intermediate material of the present invention is installed on a mandrel.

FIG. 3 is a sectional view of a conventional wheel.

[Explanation of symbols]

 W… Wheel 1… Wheel intermediate material 2… Disk part 4… Rim material cylinder 41… Rim part 5… Spinning mandrel 511… Well part molding surface

Claims (5)

[Claims] 1. In a spinning forming wheel intermediate material in which a rim blank is welded to the peripheral edge of the disc in a state where the axes are substantially the same, the width of the rim blank is adjusted to a desired rim width. An intermediate material for spinning wheels, characterized by being smaller than the rim width. 2. The spinning forming wheel intermediate material according to claim 1, wherein a rim outer side portion is connected to the disk portion and only the rim inner side portion is formed by the rim material cylinder. 3. A spinning method in which a rim material cylinder is welded to the peripheral edge of the disk part with the axes thereof being substantially the same, and the width of the rim material cylinder is smaller than the rim width of a desired rim. Spinning molding of a wheel, characterized in that a rim portion is formed by installing a molding wheel intermediate material on a spinning molding mandrel and handling the rim material cylinder while rotating the wheel intermediate material around an axis. Method. 4. The wheel spinning forming method according to claim 3, wherein the rim inner portion is formed by handling the rim material cylinder while rotating the wheel intermediate material about an axis. 5. The wheel spinning forming method according to claim 3, wherein the wheel intermediate material is disposed on the well portion forming surface of the mandrel without a gap.