JPH05200472A - Manufacture of wheel - Google Patents
Manufacture of wheelInfo
- Publication number
- JPH05200472A JPH05200472A JP1092392A JP1092392A JPH05200472A JP H05200472 A JPH05200472 A JP H05200472A JP 1092392 A JP1092392 A JP 1092392A JP 1092392 A JP1092392 A JP 1092392A JP H05200472 A JPH05200472 A JP H05200472A
- Authority
- JP
- Japan
- Prior art keywords
- rim
- disc
- disk
- equivalent
- wheel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、ディスクのオフセット
量の大きなホイールの製造方法、特に、展延性に富むア
ルミニューム合金製のホイールで且ディスク部とリム部
とを一体にした形式のホイールを鍛造とスピニング加工
によって最終形状に仕上げるホイールの製造方法に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a wheel having a large disc offset amount, and more particularly to a wheel made of an aluminum alloy having a high malleability and in which a disc portion and a rim portion are integrated. The present invention relates to a method for manufacturing a wheel that is finished into a final shape by forging and spinning.
【0002】[0002]
【従来技術及び課題】展延性に富む材質からなるホイー
ルをスピニング加工によって製造する方法として、すで
に、特公平03-71209号公報に開示されたものがあり、こ
のもでは、図1〜図3に示す工程によってリム部(1) を
製作し、このリム部を取付けフランジ(10)を用いて図4
のようにディスク部(2) の周縁にネジ止めしている。2. Description of the Related Art As a method for manufacturing a wheel made of a material having high ductility by spinning, there is one already disclosed in Japanese Patent Publication No. 03-71209, which is shown in FIGS. The rim part (1) is manufactured by the process shown, and this rim part is attached to the mounting flange (10) as shown in FIG.
It is screwed to the peripheral edge of the disc part (2) as shown in.
【0003】このものでは、中央に大きな開口を有する
一様な肉厚とした円板状素材(M) の外周部を、図1に示
すように、スピニング加工によって内リム相当側に展延
して薄肉状の筒部を形成する工程と、前記筒部の基端部
を円板状素材(M) を半径方向に裂開する工程と、この裂
開部の一方と前記筒部とによって内リム(1a)を、裂開部
の他方によって外リム(1b)を、それぞれ成形する工程と
からなる。このようにして形成されたリム部(1) では、
前記円板状素材(M) の内周端部がリム部(1) に対して直
角方向に突出する取付けフランジ(10)となる。そして、
このリム部(1)を図4のように前記取付けフランジ(10)
を用いてディスク部(2) の周縁部にネジ止めすると、ホ
イールが完成する。In this type, as shown in FIG. 1, the outer peripheral portion of a disk-shaped material (M) having a uniform thickness and a large opening in the center is spread by spinning to the side corresponding to the inner rim. To form a thin-walled tubular portion, a step of radially cleaving the disk-shaped material (M) at the base end portion of the tubular portion, and one of the cleaving portions and the tubular portion Forming the rim (1a) and the outer rim (1b) by the other of the split portions. In the rim part (1) formed in this way,
The inner peripheral end of the disc-shaped material (M) serves as a mounting flange (10) protruding in a direction perpendicular to the rim (1). And
Attach the rim (1) to the mounting flange (10) as shown in FIG.
The wheel is completed by screwing to the periphery of the disc part (2) using.
【0004】このホイールの製造方法では、リム部(1)
とディスク部(2) とが別体であることから、各別に製作
する必要があり、組立工程が必要となるものの、内リム
(1a)に相当する部分が裂開工程に先立って筒状に展延さ
れることから、リム部(1) に対する取付けフランジ(10)
のオフセット量が大きくできる利点がある。従って、円
板状素材(M) の中央開口部を小さく設定し、この円板状
素材(M) 自体にディスク部(2) を具備する構成としてお
けば、オフセット量の大きなホイールが一体的に製作で
きる。In this wheel manufacturing method, the rim portion (1)
Since the disc part (2) and the disc part (2) are separate parts, they must be manufactured separately, and an assembly process is required.
Since the part corresponding to (1a) is expanded into a cylinder prior to the cleaving process, the mounting flange (10) for the rim (1) is
The advantage is that the offset amount can be increased. Therefore, if the central opening of the disc-shaped material (M) is set small and the disc-shaped material (M) itself is equipped with the disc portion (2), a wheel with a large offset amount can be integrated. Can be manufactured.
【0005】ところが、このような製造方法を採用する
としても、リム部(1) の製造工程として、上記先行技術
をそのまま採用するかぎり製造の効率化が不十分であ
る。裂開工程に先立って内リム(1a)に相当する筒部の加
工工程が必要となり、このために長時間を要するものと
なるからである。又、上記従来の方法による場合には、
外リム(1b)の内周側にディスク部(2) の環状装飾部が連
続する形態のホイールが製作できないという問題があ
る。However, even if such a manufacturing method is adopted, the efficiency of the manufacturing is insufficient as long as the above-mentioned prior art is directly adopted as the manufacturing process of the rim portion (1). This is because a process of processing the cylindrical portion corresponding to the inner rim (1a) is required prior to the cleaving process, which requires a long time. In the case of the above-mentioned conventional method,
There is a problem that it is not possible to manufacture a wheel in which the annular decorative portion of the disc portion (2) is continuous on the inner peripheral side of the outer rim (1b).
【0006】本発明は、かかる点に鑑みてなされたもの
であり、『ディスク部(2) とリム部(1) とが一体で且デ
ィスク部(2) のオフセット量の大きなアルミニューム合
金製のホイールの製造方法であって、円板状素材(M) を
裂開した後内リム(1a)及び外リム(1b)をスピニング加工
によって加工形成するようにしたホイールの製造方法』
において、加工工程の短縮化を図り、生産性を向上でき
るようにするとともに、外リム(1b)の内周側にディスク
部(2) の環状装飾部が連続する形式のホイールを製作で
きるようにすることをその課題とする。The present invention has been made in view of the above points, and is made of an aluminum alloy in which the disc portion (2) and the rim portion (1) are integrated and the disc portion (2) has a large offset amount. A manufacturing method of a wheel, wherein the disc-shaped material (M) is cleaved and then the inner rim (1a) and the outer rim (1b) are processed by spinning. ”
In order to shorten the machining process and improve the productivity, it is possible to manufacture a wheel in which the annular decorative portion of the disc portion (2) is continuous on the inner peripheral side of the outer rim (1b). The task is to do.
【0007】[0007]
【技術的手段】上記課題を解決するための本発明の技術
的手段は、『外周に環状装飾部(22)を具備するディスク
部(2) と前記環状装飾部(22)の周縁部にリム相当部(11)
を具備するように形成した皿状の円板状素材(M) を鍛造
によって製作し、前記リム相当部(11)は、ディスク部
(2) の環状装飾部(22)の周縁部に続く厚肉部(12)と、こ
の厚肉部(12)の外周のディスク部(2) の内面側に偏った
位置からディスク部(2) の内面側に突出し且先端に向っ
て拡大するテーパ筒部(13)とから構成し、ディスク部
(2) の外面の環状装飾部(22)の周縁及びその近傍内周側
に対接するマンドレル(41)とディスク部(2) の内面でリ
ム相当部(11)の内周域に対接するマンドレル(42)によっ
てディスク部(2) を挟圧し、この挟圧状態で前記円板状
素材(M) の厚肉部(12)を、その外周面から環状装飾部(2
2)の周縁部に隣接するドロップセンタ相当部にまで裂開
して、環状装飾部(22)の外周に連続する外リム相当部(1
1b) と、テーパ筒部(13)とこれに連続する部分からなる
内リム相当部(11a) に分割し、この内リム相当部(11a)
及び外リム相当部(11b) をスピニング加工によって内リ
ム(1a)と外リム(1b)に加工成形するようにした』ことで
ある。[Technical Means] A technical means of the present invention for solving the above-mentioned problem is to provide a "disk portion (2) having an annular decorative portion (22) on the outer periphery and a rim on the peripheral portion of the annular decorative portion (22). Corresponding part (11)
The plate-shaped disc-shaped material (M) formed so as to have a disc part is manufactured by forging.
The thick portion (12) following the peripheral portion of the annular decorative portion (22) of (2) and the disc portion (2) from the position deviated to the inner surface side of the disc portion (2) on the outer periphery of the thick portion (12). ) Of the disk part that protrudes toward the inner surface and expands toward the tip.
The mandrel (41) that contacts the periphery of the annular decoration part (22) on the outer surface of (2) and the inner peripheral side in the vicinity thereof and the mandrel that contacts the inner peripheral region of the rim equivalent part (11) on the inner surface of the disk part (2). The disc portion (2) is clamped by (42), and the thick portion (12) of the disc-shaped material (M) is pressed from the outer peripheral surface to the annular decorative portion (2
The outer rim-corresponding part (1) that is continuous with the outer periphery of the annular decoration part (22) by cleaving to the part corresponding to the drop center adjacent to the peripheral part of (2)
1b) and an inner rim equivalent part (11a) consisting of a tapered cylindrical part (13) and a part continuous with this, and this inner rim equivalent part (11a)
And the outer rim equivalent part (11b) is processed into the inner rim (1a) and the outer rim (1b) by spinning ”.
【0008】[0008]
【作用】上記技術的手段は次のように作用する。裂開前
の鍛造工程では、前記テーパ筒部(13)及び厚肉部(12)を
具備する円板状素材(M) がディスク部(2) と一体に製作
されるから、リム部(1) のみを鍛造によって製作する場
合に比べて材料ロスも少なくテーパ筒部(13)に相当する
部分の肉厚も均一化され易い。The above technical means operates as follows. In the forging step before dehiscence, since the disc-shaped material (M) having the taper cylinder portion (13) and the thick wall portion (12) is manufactured integrally with the disc portion (2), the rim portion (1 Material loss is less than in the case of manufacturing only) by forging, and the wall thickness of the portion corresponding to the tapered cylindrical portion (13) is likely to be uniform.
【0009】裂開工程においては、厚肉部(12)は、内リ
ム相当部(11a) とディスク部(2) の環状装飾部(22)に連
続する外リム相当部(11b) とが形成されるが、完成状態
において環状装飾部(22)の周縁部の内側(ディスク軸線
方向内側)に位置するドロップセンタ部に相当する箇所
までの範囲で裂開され、裂開された円板状素材(M) は、
リムのドロップセンタ(1c)の直径に相当する位置に裂開
谷部が位置することとなり、この裂開谷部のディスク部
外面側には、環状装飾部(22)の周縁部に沿った断面部と
その外周側に位置する外リム相当部(11b) が、内側には
テーパ状の内リム相当部(11a) が形成される。このと
き、外側のマンドレル(41)は環状装飾部(22)の周縁部に
対接しているから、裂開によって外リム相当部(11b) が
形成されるときの環状装飾部(22)の変形が防止できる。In the cleaving process, the thick wall portion (12) is formed with an inner rim corresponding portion (11a) and an outer rim corresponding portion (11b) continuous with the annular decorative portion (22) of the disc portion (2). In the completed state, the disc-shaped material is cleaved and cleaved in a range up to a position corresponding to the drop center portion located inside the peripheral portion of the annular decorative portion (22) (inward in the disc axial direction). (M) is
The cleavage trough is located at a position corresponding to the diameter of the drop center (1c) of the rim.On the outer surface side of the disc of this cleavage trough, a cross section along the peripheral edge of the annular decoration (22) is formed. A portion and an outer rim corresponding portion (11b) located on the outer peripheral side thereof are formed, and a tapered inner rim corresponding portion (11a) is formed inside. At this time, since the outer mandrel (41) is in contact with the peripheral portion of the annular decoration portion (22), the deformation of the annular decoration portion (22) when the outer rim equivalent portion (11b) is formed by dehiscence. Can be prevented.
【0010】以上のように裂開されたものでは、前記内
リム相当部(11a) の大部分は、鍛造によって形成された
テーパ筒部(13)であり、厚肉板材からスピニング加工の
みによって内リム相当部(11a) を製作する場合に比べて
内リム相当部(11a) を成形するための所要時間が短縮さ
れる。そして、ディスク部(2) の周縁に続く内リム相当
部(11a) 及び外リム相当部(11b) をスピニング加工によ
って内リム(1a)及び外リム(1b)に加工成形すると、ホイ
ールが完成する。このとき、内リム相当部(11a) の部分
の肉厚は、鍛造工程によって所定の肉厚に設定されたも
のとなるから、又、全体は先端に向って拡大する形状で
あるから、内リム(1a)の最終断面形状に仕上げるための
スピニング加工性が良い。In the case of splitting as described above, most of the inner rim corresponding portion (11a) is a tapered cylindrical portion (13) formed by forging, and is formed only by spinning from a thick plate material. The time required to mold the inner rim corresponding part (11a) is shortened as compared with the case where the rim corresponding part (11a) is manufactured. Then, the inner rim equivalent part (11a) and the outer rim equivalent part (11b) following the periphery of the disc part (2) are processed into the inner rim (1a) and the outer rim (1b) by spinning, and the wheel is completed. .. At this time, the wall thickness of the portion corresponding to the inner rim (11a) is set to a predetermined wall thickness by the forging process, and the entire inner rim has a shape that expands toward the tip. Good spinning workability to finish the final cross-sectional shape of (1a).
【0011】[0011]
【効果】鍛造工程、裂開工程、及び、スピニング加工工
程によってホイールが完成するから、上記従来のものに
比べてホイールの製造工程が大幅に合理化され生産製が
向上する。スピニング加工に先立つ内リム相当部(11a)
の形成工程が、従来のスピニング加工のみによって形成
される場合に比べて大幅に時間短縮できるから、この点
でもホイールの生産性が向上する。[Effect] Since the wheel is completed by the forging process, the splitting process, and the spinning process, the wheel manufacturing process is greatly rationalized and the production is improved as compared with the conventional one. Inner rim equivalent part (11a) prior to spinning
Since the forming step can be significantly shortened in time as compared with the case of forming only by the conventional spinning process, the productivity of the wheel is also improved in this respect.
【0012】鍛造によってディスク部(2) と、内リム相
当部(11a) の大部分となるテーパ筒部(13)が一体形成さ
れ、この部分の肉厚精度が良好なものとなるから、内リ
ム(1a)の仕上げ精度及びこの部分のスピニング加工性も
良好なものとなる。ディスク部(2) の環状装飾部(22)の
周縁のホイール内面側のドロップセンタ部にまで裂開さ
れ、この裂開による環状装飾部(22)の変形が防止された
ものとなるから、外リム(1b)の内周側に環状装飾部が連
続するホイールが製作できる。By forging, the disk portion (2) and the tapered cylindrical portion (13), which is a large part of the inner rim equivalent portion (11a), are integrally formed, and the wall thickness accuracy of this portion is good, so The finishing accuracy of the rim (1a) and the spinnability of this portion are also good. Since the annular decorative part (22) is prevented from being deformed due to the cleavage, the circular decorative part (22) of the disc part (2) is cleaved to the drop center part on the inner surface side of the wheel. It is possible to manufacture a wheel in which an annular decorative portion is continuous on the inner peripheral side of the rim (1b).
【0013】[0013]
【実施例】次に、上記した本発明の実施例を図面に従っ
て詳述する。この実施例では、図5に示す断面形状のホ
イールを製作するものであり、このホイールのディスク
部(2) には、その中央の車軸取付け部(21)の外周に種々
の模様や開口を具備させた環状装飾部(22)を形成し、こ
の環状装飾部の外周縁にリム部(1) の外リム(1b)が連続
するように形成された構成であり、リム部(1) のドロッ
プセンタ(1c)と外リム(1b)との間に前記ディスク部(2)
が連続し、このディスク部がリム部(1) に対してホイー
ルの外面側に大きくオフセットされている。Embodiments of the present invention described above will now be described in detail with reference to the drawings. In this embodiment, a wheel having a cross-sectional shape shown in FIG. 5 is manufactured, and the disk portion (2) of this wheel is provided with various patterns and openings on the outer periphery of the central axle mounting portion (21). Is formed so that the outer rim (1b) of the rim portion (1) is continuous with the outer peripheral edge of the annular decoration portion (22), and the drop of the rim portion (1) is formed. The disc portion (2) is provided between the center (1c) and the outer rim (1b).
And the disc is largely offset to the outer surface of the wheel with respect to the rim (1).
【0014】円板状素材(M) は鍛造によって製作される
が、この円板状素材(M) のディスク部(2) の全体は、図
6に示すように、最終形状に仕上げられており、ディス
ク部(2) の周縁から一定範囲が上記環状装飾部(22)とな
っている。尚、場合によっては車軸取付け部(21)のボル
ト孔等は後加工によって形成されることもある。前記の
ように形成されたディスク部(2) の周縁部には厚肉部(1
2)が連続的に形成されており、この実施例では、この厚
肉部(12)の断面は内周側の幅が小さな台形状となって上
記環状装飾部(22)に連続しており、この厚肉部(12)の内
面側端面(12a) に一様に連続する態様でテーパ筒部(13)
が形成されている。上記環状装飾部(22)は、図7のよう
に、ディスク部(2) の外面側から多数の凹陥部(22a)(22
a)が円周方向に連続した構成となっている。The disc-shaped material (M) is manufactured by forging, and the entire disc portion (2) of this disc-shaped material (M) is finished in the final shape as shown in FIG. A fixed range from the peripheral edge of the disc portion (2) is the annular decoration portion (22). Depending on the case, the bolt holes and the like of the axle mounting portion (21) may be formed by post-processing. A thick part (1) is formed on the periphery of the disk part (2) formed as described above.
2) is continuously formed, in this embodiment, the cross section of the thick portion (12) is trapezoidal with a small width on the inner peripheral side and is continuous with the annular decorative portion (22). , The taper tube portion (13) in a manner to be uniformly continuous with the end surface (12a) on the inner surface side of the thick portion (12)
Are formed. As shown in FIG. 7, the annular decorative portion (22) has a large number of concave portions (22a) (22a) from the outer surface side of the disc portion (2).
The structure a) is continuous in the circumferential direction.
【0015】前記テーパ筒部(13)は先端に向って拡大す
るテーパ状であり、その最大外径は、ホイールの外径に
略一致するか又はそれよりも僅かに大きく設定されてい
る。また、前記テーパ筒部(13)の肉厚は、後続のスピニ
ング加工工程の厚下率との関係で所定の値に設定されて
おり、最終形状における内リム(1a)の耳部(14)以外の部
分の肉厚を3mmとすれば、このテーパ筒部(13)の肉厚
を10mm程度に設定して、スピニング加工のしごき加
工成分によって最終リム断面形状になる断面長さに設定
されている。The tapered cylindrical portion (13) has a tapered shape that expands toward the tip, and its maximum outer diameter is set to be substantially equal to or slightly larger than the outer diameter of the wheel. Further, the wall thickness of the tapered cylindrical portion (13) is set to a predetermined value in relation to the thickness reduction rate in the subsequent spinning process, and the ear portion (14) of the inner rim (1a) in the final shape. If the wall thickness of the other parts is 3 mm, the wall thickness of this taper cylinder part (13) is set to about 10 mm, and the cross-section length that becomes the final rim cross-sectional shape is set by the ironing component of the spinning process. There is.
【0016】前記厚肉部(12)の部分の肉厚は、前記テー
パ筒部(13)のそれの約二倍よりも僅かに大きく設定され
ており、前記テーパ筒部(13)はその内面が厚肉部(12)の
内面側端面(12a) と連続するように延長形成されてい
る。このように形成された円板状素材(M) を、図8に示
すように、裂開ローラ(31)を用いてテーパ筒部(13)の基
端部に続く箇所で所定深さに裂開する。これにより、裂
開後の外側部分が外リム相当部(11b) となり、裂開後の
外側部分がテーパ筒部(13)と一様な肉厚で連続して全体
が内リム相当部(11a) となる。The thickness of the thick wall portion (12) is set to be slightly larger than about twice that of the taper cylinder portion (13), and the taper cylinder portion (13) has an inner surface thereof. Are extended so as to be continuous with the inner surface side end surface (12a) of the thick portion (12). As shown in FIG. 8, the disc-shaped material (M) formed in this manner is torn to a predetermined depth using a tear roller (31) at a position following the base end of the tapered cylindrical portion (13). Open. As a result, the outer part after dehiscence becomes the outer rim equivalent part (11b), and the outer part after dehiscence is continuous with the tapered cylindrical part (13) with a uniform thickness, and the whole part corresponds to the inner rim (11a). ).
【0017】この裂開工程では、マンドレル(41)(42)に
よってディスク部(2) を挟圧することとなるが、図6及
び図7のように形成された円板状素材(M) を、図8に示
すように、内リム相当部(11a) の内周径に略一致するマ
ンドレル(42)と、環状装飾部(22)の外周径に略一致しこ
の環状装飾部(22)の表面形状に一致する端面形状のマン
ドレル(41)によってディスク部(2) を挟圧して裂開仮想
線(30)に沿って裂開する。In this cleaving process, the disk portion (2) is clamped by the mandrels (41) (42), but the disc-shaped material (M) formed as shown in FIGS. 6 and 7 is As shown in FIG. 8, the mandrel (42) that substantially matches the inner peripheral diameter of the inner rim equivalent portion (11a) and the outer peripheral diameter of the annular decorative portion (22) that substantially matches the surface of the annular decorative portion (22). The disc portion (2) is pinched by the mandrel (41) having an end face shape that matches the shape and the disc portion (2) is torn along the virtual tear line (30).
【0018】この裂開仮想線(30)は、凹陥部(22a) の底
壁であって環状装飾部(22)の外周端部に沿って傾斜する
ように設定されており、この裂開仮想線(30)に沿って裂
開すると、この裂開によって凹陥部(22a) の底壁端部(2
2c) に隣接するドロップセンタ(1c)の一部の断面部が大
略形成されることとなる。なお、前記各凹陥部(22a)の
端縁部で裂開谷部に隣接する部分にマンドレル(41)の端
面が対接するから、裂開工程の際、環状装飾部(22)の形
状が歪む心配もない。The virtual dehiscence line (30) is set so as to incline along the outer peripheral edge of the annular decoration (22) which is the bottom wall of the recess (22a). When dehiscing along the line (30), this dehiscence causes the bottom wall end (2) of the recess (22a).
A part of the cross section of the drop center (1c) adjacent to 2c) will be roughly formed. In addition, since the end face of the mandrel (41) is in contact with the portion adjacent to the cleavage valley at the edge of each recess (22a), the shape of the annular decorative portion (22) is distorted during the cleavage process. No worries.
【0019】又、上記環状素材(M) において、テーパ筒
部(13)の外周面の角度と、裂開ローラ(31)の山形周縁部
の角度を所定に設定しておくと、厚肉部(12)を裂開した
部分の内側部分とテーパ筒部(13)との境界の屈曲角度が
極少ないものとなる。例えば、前記テーパ筒部(13)のデ
ィスク部(2) の軸線に対する角度を45度程度に設定
し、裂開ローラ(31)の外周面の角度を20度〜40度程
度に設定しておくと、裂開後において内リム相当部(11
a) がほぼ一様なテーパ状となった。このように、内リ
ム相当部(11a) が一様なテーパ状となっていることは、
この後に続く、スピニング工程において有利なものとな
る。In the annular material (M), if the angle of the outer peripheral surface of the taper cylinder portion (13) and the angle of the chevron peripheral portion of the cleaving roller (31) are set to a predetermined value, the thick wall portion The bending angle at the boundary between the inner portion of the portion where the (12) is cleaved and the tapered cylindrical portion (13) is extremely small. For example, the angle of the taper tube portion (13) with respect to the axis of the disc portion (2) is set to about 45 degrees, and the angle of the outer peripheral surface of the tear roller (31) is set to about 20 to 40 degrees. After the dehiscence,
a) has a substantially uniform taper shape. In this way, the fact that the inner rim equivalent part (11a) has a uniform taper shape
This is advantageous in the spinning process that follows.
【0020】このように裂開された円板状素材(M) を図
9に示すようにマンドレル(43)(44)によって挟圧して、
このマンドレルの外周面に形成したリム断面部に倣っ
て、内リム相当部(11a) 及び外リム相当部(11b) をスピ
ニングロール(32)を用いてスピニング加工すると、内リ
ム(1a)及び外リム(1b)が形成される。尚、この場合、ス
ピニング加工時の厚下率は70%程度に設定すると、大
きな加工硬化を起すことなく良好な仕上がりが確保でき
た。The disc-shaped material (M) thus cleaved is clamped by mandrels (43) (44) as shown in FIG.
Following the rim cross-section formed on the outer peripheral surface of this mandrel, when the inner rim equivalent part (11a) and the outer rim equivalent part (11b) are spin-processed using the spinning roll (32), the inner rim (1a) and the outer rim (1a) A rim (1b) is formed. In this case, if the thickness reduction rate during the spinning process is set to about 70%, a good finish can be secured without causing large work hardening.
【0021】このとき、内リム相当部(11a) の肉厚及び
断面長さは、最終形状の内リム(1a)に適合するように事
前に所定の値に設定されているから、又、内リム相当部
(11a) はその外径がホイールの外径よりも大きめに設定
されているから、極僅かの絞り加工と所定のしごき加工
の組合せによって内リム(1a)が形成されることとなり、
亀裂の生じない条件で最終リム断面形状にまで冷間加工
できる。At this time, the wall thickness and the cross-sectional length of the inner rim corresponding portion (11a) are set to predetermined values in advance so as to fit the inner rim (1a) of the final shape. Rim equivalent part
Since the outer diameter of (11a) is set to be larger than the outer diameter of the wheel, the inner rim (1a) is formed by a combination of a very small drawing process and a predetermined ironing process.
It is possible to cold work to the final rim cross-sectional shape without cracking.
【0022】上記実施例のものでは、裂開仮想線(30)を
斜めに設定したが、図10〜図12に示すように、裂開
仮想線(30)を屈曲させるようにすることもできる。図1
0に示す実施例では、環状装飾部(22)の凹陥部(22a) の
底壁端部(22c) から一様な断面の外リム相当部(11b) が
突出するように裂開されるから、上記実施例と同様に、
底壁端部(22)とドロップセンタ(1c)とが軸線方向に連続
する。Although the dehiscence virtual line (30) is set obliquely in the above embodiment, the dehiscence virtual line (30) may be bent as shown in FIGS. 10 to 12. .. Figure 1
In the embodiment shown in FIG. 0, the outer rim equivalent part (11b) having a uniform cross section is cleaved so as to protrude from the bottom wall end (22c) of the concave part (22a) of the annular decoration part (22). , As in the above example,
The bottom wall end (22) and the drop center (1c) are continuous in the axial direction.
【0023】この実施例では、図10に示すように、円
板状素材(M) の厚肉部(12)はテーパ筒部(13)の肉厚と一
様な断面の外リム相当部(11b) との和に設定されてお
り、この厚肉部(12)を図11のように底壁端部(22c) の
端縁で屈曲させるように裂開すると、内リム相当部(11
a) 及び外リム相当部(11b) が共に一様な肉厚となる。
そして、このように裂開された前記各リム相当部をスピ
ニング加工によって最終形状に仕上げると、図12のよ
うなホイールとなる。In this embodiment, as shown in FIG. 10, the thick-walled portion (12) of the disc-shaped material (M) has a thickness equal to that of the tapered cylindrical portion (13) and is equivalent to the outer rim portion ( 11b), and when this thick part (12) is torn open so that it bends at the edge of the bottom wall end (22c) as shown in FIG. 11, the inner rim equivalent part (11
Both a) and the outer rim equivalent part (11b) have uniform thickness.
Then, when the rim-corresponding portions thus split apart are finished into a final shape by spinning, a wheel as shown in FIG. 12 is obtained.
【0024】尚、裂開後の内リム相当部(11a) は、一様
なテーパ状であることが望ましく、このためには、円板
状素材(M) のテーパ角度と、裂開ローラ(31)の頂角及び
裂開方向を所定の条件に設定すればよい。このとき、ホ
イール軸線に直角な平面に対する裂開仮想線(30)の角度
をθとすれば、この角度を完成リム断面のドロップセン
タ(1c)の外側の斜面部の角度に一致させておくと、裂開
によって前記斜面部が形成されることとなる。また、こ
のように、斜めに裂開するとき、裂開ローラ(31)の周縁
の三角形状断面部の外側のテーパ面(31a) の角度を前記
裂開仮想線角度θに一致するか又はこれよりも5度〜1
0度小さく設定して逃げ角度を設けると、裂開工程が円
滑に進行する。一方、裂開ローラ(31)の周縁の内側のテ
ーパ面(31b) の角度については、25度〜45度程度に
設定しておくとよく、さらに、裂開ローラ(31)の周縁の
円弧は、半径1mm〜5mm程度が良い。(図8参照)
又、上記ドロップセンタ(1c)の外側の斜面部は、15度
〜30度に設定されるものであるから、上記裂開仮想線
角度θをこの値に設定しておくと、この部分は裂開工程
によってほぼ最終形状に仕上げられることとなる。It is desirable that the portion (11a) corresponding to the inner rim after dehiscence has a uniform taper shape. For this purpose, the taper angle of the disc material (M) and the dehiscence roller ( The apex angle and the tearing direction of 31) may be set to predetermined conditions. At this time, if the angle of the virtual dehiscence line (30) with respect to the plane perpendicular to the wheel axis is θ, this angle should match the angle of the outer slope of the drop center (1c) of the completed rim cross section. The sloping surface will be formed by the cleavage. Further, in this way, when obliquely cleaving, the angle of the outer tapered surface (31a) of the triangular cross-section of the peripheral edge of the cleaving roller (31) is equal to or the same as the virtual virtual cleaving angle θ. Than 5 degrees to 1
When the clearance angle is set by setting it to be small by 0 degree, the tearing process proceeds smoothly. On the other hand, the angle of the taper surface (31b) inside the peripheral edge of the cleaving roller (31) may be set to about 25 ° to 45 °, and the arc of the peripheral edge of the cleaving roller (31) is The radius is preferably about 1 mm to 5 mm. (See Figure 8)
Further, the slope portion outside the drop center (1c) is set to 15 to 30 degrees, so if the above-mentioned virtual rupture line angle θ is set to this value, this portion will be ruptured. By the opening process, the final shape is almost finished.
【0025】さらに、通常は、環状装飾部(22)にはブレ
ーキ装置部の空冷効果を促進するため、ディスク部(2)
の内外に連通する開口が形成されることが多い。このた
めには、凹陥部(22a) の底壁部の所定の範囲に図6及び
図7に示す開口(H) を有するように鍛造によって円板状
素材(M) を形成するようにするか、又は、鍛造工程後或
は完成後において前記所定の範囲に前記開口(H) を形成
するようにする。Further, normally, in order to promote the air cooling effect of the brake device portion, the annular decoration portion (22) is provided with the disc portion (2).
Often, an opening is formed that communicates with the inside and outside of the. For this purpose, the disc-shaped material (M) should be formed by forging so as to have the opening (H) shown in FIGS. 6 and 7 in a predetermined area of the bottom wall of the recess (22a). Alternatively, the opening (H) is formed in the predetermined range after the forging process or after the completion.
【図1】従来例の第1工程の説明図FIG. 1 is an explanatory diagram of a first step of a conventional example.
【図2】これの裂開工程の説明図FIG. 2 is an explanatory view of the dehiscence process.
【図3】これのスピニング加工工程の説明図FIG. 3 is an explanatory diagram of a spinning process for this.
【図4】従来例のホイールの説明図FIG. 4 is an explanatory view of a conventional wheel.
【図5】本発明の方法によって製作されるホイールの断
面図FIG. 5 is a sectional view of a wheel manufactured by the method of the present invention.
【図6】円板状素材(M) の断面図[Fig. 6] Sectional view of disk-shaped material (M)
【図7】円板状素材(M) の正面図[Fig. 7] Front view of disk-shaped material (M)
【図8】裂開工程の説明図FIG. 8 is an explanatory diagram of the dehiscence process.
【図9】スピニング加工工程の説明図FIG. 9 is an explanatory diagram of a spinning process step.
【図10】他の実施例の方法の円板状素材(M) の説明図FIG. 10 is an explanatory diagram of a disc-shaped material (M) according to another embodiment of the method.
【図11】この場合の裂開工程の説明図FIG. 11 is an explanatory diagram of the dehiscence process in this case.
【図12】この実施例の場合の最終仕上げ形状の断面図FIG. 12 is a sectional view of the final finished shape in the case of this embodiment.
(2) ・・・ディスク部 (1) ・・・リム部 (M) ・・・円板状素材 (1a)・・・内リム (1b)・・・外リム (11)・・・リム相当部 (12)・・・厚肉部 (13)・・・テーパ筒部 (2) ・ ・ ・ Disc part (1) ・ ・ ・ Rim part (M) ・ ・ ・ Disc-shaped material (1a) ・ ・ ・ Inner rim (1b) ・ ・ ・ Outer rim (11) ・ ・ ・ Rim equivalent Part (12) ・ ・ ・ Thick part (13) ・ ・ ・ Taper cylinder
Claims (1)
且ディスク部(2) のオフセット量の大きなアルミニュー
ム合金製のホイールの製造方法であって、円板状素材
(M) を裂開した後内リム(1a)及び外リム(1b)をスピニン
グ加工によって加工形成するようにしたホイールの製造
方法において、外周に環状装飾部(22)を具備するディス
ク部(2) と前記環状装飾部(22)の周縁部にリム相当部(1
1)を一体に形成した皿状の円板状素材(M) を鍛造によっ
て製作し、前記リム相当部(11)は、ディスク部(2) の環
状装飾部(22)の周縁部に続く厚肉部(12)と、この厚肉部
(12)の外周のディスク部(2) の内面側に偏った位置から
ディスク部(2) の内面側に突出し且先端に向って拡大す
るテーパ筒部(13)とから構成し、ディスク部(2) の外面
の環状装飾部(22)の周縁及びその近傍内周側に対接する
マンドレル(41)とディスク部(2) の内面でリム相当部(1
1)の内周域に対接するマンドレル(42)によってディスク
部(2) を挟圧し、この挟圧状態で前記円板状素材(M) の
厚肉部(12)を、その外周面から環状装飾部(22)の周縁部
に隣接するドロップセンタ相当部にまで裂開して、環状
装飾部(22)の外周に連続する外リム相当部(11b) と、テ
ーパ筒部(13)とこれに連続する部分からなる内リム相当
部(11a) に分割し、この内リム相当部(11a) 及び外リム
相当部(11b) をスピニング加工によって内リム(1a)と外
リム(1b)に加工成形するようにしたホイールの製造方
法。1. A method of manufacturing a wheel made of an aluminum alloy in which a disc portion (2) and a rim portion (1) are integrated and a large offset amount of the disc portion (2) is provided, which is a disc-shaped material.
In the method for manufacturing a wheel in which the inner rim (1a) and the outer rim (1b) are processed by spinning after cleaving (M), a disk part (2) provided with an annular decorative part (22) on the outer circumference is provided. ) And the rim-corresponding part (1
The plate-shaped disc-shaped material (M) integrally formed with 1) is manufactured by forging, and the rim-corresponding part (11) has a thickness continuing from the peripheral part of the annular decorative part (22) of the disc part (2). Meat part (12) and this thick part
The disk portion (12) is formed on the outer periphery of the outer peripheral surface of (12) and is tapered toward the inner surface side of the disk portion (2) from a position biased toward the inner surface side of the disk portion (2) and expands toward the tip. 2) The inner surface of the mandrel (41) and the disk portion (2) that are in contact with the peripheral edge of the annular decorative portion (22) on the outer surface of the outer peripheral surface of (2) and in the vicinity of the inner peripheral side of the annular peripheral portion (22).
The disk part (2) is pinched by the mandrel (42) facing the inner peripheral area of (1), and the thick part (12) of the disc-shaped material (M) is annularly pressed from its outer peripheral surface in this pinched state. An outer rim equivalent part (11b) continuous with the outer periphery of the annular decorative part (22) by cleaving to a drop center equivalent part adjacent to the peripheral part of the decorative part (22), and a tapered tubular part (13) It is divided into an inner rim equivalent part (11a) consisting of continuous parts, and this inner rim equivalent part (11a) and outer rim equivalent part (11b) are processed into an inner rim (1a) and an outer rim (1b) by spinning. A method of manufacturing a wheel adapted to be molded.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1092392A JPH05200472A (en) | 1992-01-24 | 1992-01-24 | Manufacture of wheel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1092392A JPH05200472A (en) | 1992-01-24 | 1992-01-24 | Manufacture of wheel |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH05200472A true JPH05200472A (en) | 1993-08-10 |
Family
ID=11763763
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1092392A Pending JPH05200472A (en) | 1992-01-24 | 1992-01-24 | Manufacture of wheel |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH05200472A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007010121A (en) * | 2005-07-04 | 2007-01-18 | Hosei Brake Ind Ltd | Backing plate structure for drum brake |
US9260577B2 (en) | 2009-07-14 | 2016-02-16 | Toray Plastics (America), Inc. | Crosslinked polyolefin foam sheet with exceptional softness, haptics, moldability, thermal stability and shear strength |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63290641A (en) * | 1987-05-21 | 1988-11-28 | Asahi Malleable Iron Co Ltd | Manufacture of wheel for vehicle |
JPS6487023A (en) * | 1987-09-30 | 1989-03-31 | Asahi Malleable Iron Co Ltd | Spinner forming device |
JPH0318972A (en) * | 1989-06-15 | 1991-01-28 | Hitachi Ltd | Remote maintenance system for automatic cash transaction machine |
JPH0371209A (en) * | 1989-08-10 | 1991-03-27 | Mitsubishi Electric Corp | Abnormality detector for numerical control program |
-
1992
- 1992-01-24 JP JP1092392A patent/JPH05200472A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63290641A (en) * | 1987-05-21 | 1988-11-28 | Asahi Malleable Iron Co Ltd | Manufacture of wheel for vehicle |
JPS6487023A (en) * | 1987-09-30 | 1989-03-31 | Asahi Malleable Iron Co Ltd | Spinner forming device |
JPH0318972A (en) * | 1989-06-15 | 1991-01-28 | Hitachi Ltd | Remote maintenance system for automatic cash transaction machine |
JPH0371209A (en) * | 1989-08-10 | 1991-03-27 | Mitsubishi Electric Corp | Abnormality detector for numerical control program |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007010121A (en) * | 2005-07-04 | 2007-01-18 | Hosei Brake Ind Ltd | Backing plate structure for drum brake |
US9260577B2 (en) | 2009-07-14 | 2016-02-16 | Toray Plastics (America), Inc. | Crosslinked polyolefin foam sheet with exceptional softness, haptics, moldability, thermal stability and shear strength |
US10301447B2 (en) | 2009-07-14 | 2019-05-28 | Toray Plastics (America), Inc. | Crosslinked polyolefin foam sheet with exceptional softness, haptics, moldability, thermal stability and shear strength |
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