JP2732185B2 - Method for forming rim of automobile wheel - Google Patents
Method for forming rim of automobile wheelInfo
- Publication number
- JP2732185B2 JP2732185B2 JP4011793A JP4011793A JP2732185B2 JP 2732185 B2 JP2732185 B2 JP 2732185B2 JP 4011793 A JP4011793 A JP 4011793A JP 4011793 A JP4011793 A JP 4011793A JP 2732185 B2 JP2732185 B2 JP 2732185B2
- Authority
- JP
- Japan
- Prior art keywords
- rim
- forming
- equivalent
- cross
- outer rim
- 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.)
- Expired - Lifetime
Links
Landscapes
- Forging (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Description
【０００１】[0001]
【利用分野】本発明は、アルミニューム合金やマグネシ
ウム合金などの塑性加工性に富む素材から一体に形成さ
れた自動車用ホイールのリム部成形方法、特に、素材の
所要部を裂開した後これをリム断面に仕上げる方式のリ
ム部成形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 forming a rim of an automobile wheel integrally formed from a material having a high plastic workability, such as an aluminum alloy or a magnesium alloy. The present invention relates to a method of forming a rim portion in a method of finishing a rim section.
【０００２】[0002]
【従来技術およびその問題点】自動車用ホイールのリム
部は、ホイールのディスク部周縁、あるいは、ディスク
部を取り付けるための環状の取付フランジの周縁に連設
一体化される。ディスク部周縁にリム部が連設される形
式のホイールであって、リム部断面がディスク部に対し
て対称な形状のリム部を成形する方法が、特公昭57-554
98に開示されている。2. Description of the Related Art A rim portion of an automobile wheel is continuously integrated with a periphery of a disc portion of the wheel or a periphery of an annular mounting flange for attaching the disc portion. A method of forming a rim portion in which a rim portion is continuously provided on the periphery of the disc portion and the rim portion cross section is symmetric with respect to the disc portion is disclosed in Japanese Patent Publication No. 57-554.
98.
【０００３】この方法では、図１から図３に示すよう
に、リム部以外の部分を最終形状に仕上げた半製品を予
め製作し、この半製品の周縁に形成されたリム相当部(1
2)を図２のように内リム相当部と外リム相当部とに裂開
した後、この裂開部分を図３のように成形ローラにより
リム断面に仕上げている。このものでは、前記成形ロー
ラの外周面の形状がリム外周面のそれに適合させてある
から、前記成形ローラを用いたロール成形によりリム断
面全域が一度に成形でき、リム部断面の加工作業の作業
性が改善できる。In this method, as shown in FIGS. 1 to 3, a semi-finished product in which parts other than the rim are finished to a final shape is manufactured in advance, and a rim-equivalent portion (1) formed around the periphery of the semi-finished product is manufactured.
2) is split into a portion corresponding to the inner rim and a portion corresponding to the outer rim as shown in FIG. 2, and the split portion is finished to a rim cross section by a forming roller as shown in FIG. In this apparatus, since the shape of the outer peripheral surface of the forming roller is adapted to that of the outer peripheral surface of the rim, the entire area of the rim cross section can be formed at once by roll forming using the forming roller, and the work of processing the rim section cross section is performed at once. Can be improved.
【０００４】ところが、この従来の方法は、ディスク部
（ドロップセンター部）がリム断面の一方に偏った形式
の自動車用ホイールのリム部の成形にはそのまま採用し
難い。前記従来の方法を採用する場合、ディスク部の外
周部分でリム相当部(12)を裂開することとなるが、上記
自動車用ホイールの内リム部の幅と外リム部の幅とが大
きく相違するから、裂開によって形成された内リム相当
部と外リム相当部をロール成形して最終断面形状に仕上
げるとき、各部の展延度合いが大きく相違することとな
るからである。However, this conventional method is difficult to use as it is for molding a rim of an automobile wheel in which a disk portion (drop center portion) is biased to one side of a rim cross section. When the above-mentioned conventional method is adopted, the rim-equivalent portion (12) is torn at the outer peripheral portion of the disk portion, but the width of the inner rim portion and the width of the outer rim portion of the automobile wheel differ greatly. Therefore, when the inner rim-equivalent portion and the outer rim-equivalent portion formed by the splitting are roll-formed to finish the final cross-sectional shape, the degree of spreading of each portion is greatly different.
【０００５】すなわち、裂開後に上記の成形ローラのみ
によって展延を行っても、内リム相当部における内リム
端縁方向への素材の流れが遅くなって、この加工に長時
間を要すると共に、前記加圧ローラの加圧力を大きくし
ても最終断面までの加工が不十分になるからである。[0005] That is, even if the spreading is performed only by the above-mentioned forming roller after the tearing, the flow of the material in the direction corresponding to the inner rim edge at the portion corresponding to the inner rim becomes slow, and this processing takes a long time. This is because the processing up to the final cross section becomes insufficient even if the pressing force of the pressure roller is increased.
【０００６】[0006]
【技術的課題】本発明は、このような点に鑑みてなされ
たものであり、『塑性加工可能な被加工素材(10)のリム
相当部(12)を裂開とロール成形の組み合わせによって、
自動車用ホイールのリム部に成形する方法』において、
リムの成形性を高めると共に、その製造効率を向上させ
ることをその技術的課題とする。[Technical problem] The present invention has been made in view of the above points, and "The rim-equivalent part (12) of a workable material (10) capable of plastic working is formed by a combination of splitting and roll forming.
Method for molding on the rim of an automotive wheel "
It is an object of the present invention to enhance the formability of the rim and to improve the production efficiency.
【０００７】[0007]
【技術的手段】上記技術的課題を解決するために講じた
本発明は、『被加工素材(10)は、環状に***したリム相
当部(12)の内周にディスク部(1) 、又は、取付フランジ
部を一体形成した構成とし、被加工素材(10)におけるリ
ム相当部(12)の内周域を一対の第１・第２金型(3a)(3b)
によって挟圧保持し、これら金型の境界部外周にこれら
と相対回転し且前記境界部に向って移動可能に支持され
た成形ローラ(4) を配置し、前記第１金型(3a)の端面側
の外周胴部には、外リム(2a)の断面に適合させた第１環
状型部(32)を形成し、前記成形ローラ(4) は、その最大
径部(41)から一方の端部までを外リム成形部(4a)とする
と共に、この外リム成形部(4a)の外周面はドロップセン
ターの一部から外リム(2a)端部までの形状に一致させ、
成形ローラ(4) の最大径部(41)をリム相当部(12)内に所
定経路で押し込んで外リム成形部(4a)を最終的に第１環
状型部(32)に対向させることにより、外リム(2a)断面を
成形するようにした』ことである。[Technical Means] The present invention which has been taken to solve the above technical problem is described as follows: "The material to be processed (10) has a disk portion (1) on the inner periphery of an annularly raised rim equivalent portion (12), or , The mounting flange portion is integrally formed, and the inner peripheral area of the rim-equivalent portion (12) of the workpiece (10) is formed by a pair of first and second molds (3a) (3b).
The forming roller (4), which rotates relative to these and is supported so as to be movable toward the boundary, is disposed around the boundary between the dies and the first die (3a). A first annular mold part (32) adapted to the cross section of the outer rim (2a) is formed on the outer peripheral body part on the end face side, and the forming roller (4) is one of the largest diameter parts (41) from its maximum diameter part (41). With the outer rim forming part (4a) up to the end, the outer peripheral surface of this outer rim forming part (4a) matches the shape from a part of the drop center to the end of the outer rim (2a),
By pressing the maximum diameter portion (41) of the forming roller (4) into the rim-equivalent portion (12) along a predetermined path so that the outer rim forming portion (4a) finally faces the first annular mold portion (32). The outer rim (2a) cross section was formed. "
【０００８】[0008]
【作用】本発明の上記技術的手段は次のように作用す
る。鍛造工程によってリム相当部(12)以外の部分を最終
形状に仕上げたものを被加工素材(10)とし、この被加工
素材(10)に本発明の成形方法を実行して、前記リム相当
部(12)の少なくとも外リム相当部を最終のリム形状にま
で成形加工する。The above technical means of the present invention operates as follows. The material other than the rim-equivalent part (12) in the forging process is finished to a final shape, and the processed material (10) is subjected to the molding method of the present invention on the processed material (10). At least the part corresponding to the outer rim of (12) is formed into a final rim shape.
【０００９】この成形方法においては、前記被加工素材
(10)は、ディスク部(1) が第１・第２金型(3a)(3b)間に
挟圧されて保持されている。この状態で前記第１・第２
金型(3a)(3b)と成形ローラ(4) とを相対回転させ、そし
て、成形ローラ(4) を所定の移動経路で前記第１・第２
金型(3a)(3b)側に押し込んで最終的に外リム成形部(4a)
を第１環状型部(32)に対向させる。In this molding method, the material to be processed is
In (10), the disk portion (1) is held by being pressed between the first and second molds (3a) and (3b). In this state, the first and second
The dies (3a) and (3b) and the forming roller (4) are rotated relative to each other, and the forming roller (4) is moved along a predetermined moving path to the first and second rollers.
Push into the mold (3a) (3b) side and finally the outer rim molding (4a)
To the first annular mold portion (32).
【００１０】このとき、前記成形ローラ(4) の最大径部
(41)はその外周面において最も突出した部分であること
から、前記成形ローラ(4) がリム相当部(12)側に押し込
まれると、先ず、最大径部(41)が前記リム相当部(12)の
所定位置を裂開し、さらに、上記裂開が進行すると、上
記裂開部分の少なくとも外リム相当部は、前記成形ロー
ラ(4) の外リム成形部(4a)によって、押し広げられると
共に、相当するリム断面に展延され、最終的に、この外
リム相当部は、外リム成形部(4a)と第１環状型部(32)に
挟まれた形状、すなわち、外リム(2a)として仕上げられ
る。At this time, the maximum diameter portion of the forming roller (4)
(41) is the most protruding portion on the outer peripheral surface, so when the forming roller (4) is pushed toward the rim-equivalent portion (12), first, the largest diameter portion (41) firstly becomes the rim-equivalent portion ( When the predetermined position of (12) is cleaved and further the cleaving progresses, at least a portion corresponding to the outer rim of the cleaved portion is expanded by the outer rim forming portion (4a) of the forming roller (4). At the same time, the outer rim-equivalent portion is formed into a shape sandwiched between the outer rim forming portion (4a) and the first annular mold portion (32), that is, the outer rim (2a ).
【００１１】この後、内リム側断面は、前記成形ローラ
(4) とは別のスピニングロール加工その他のロール成形
加工により仕上げられる。尚、外リム(2a)からドロップ
センターの内リム側の一部までの範囲を成形ローラ(4)
によって同時に仕上げるようにしてもよい。このために
は、この成形ローラ(4) を、例えば、外リム成形部(4a)
に続けてドロップセンターの内リム側の一部に対応する
内リム成形部を具備する構成とする。After that, the inner rim side section is
Finished by spinning roll processing or other roll forming processing different from (4). The range from the outer rim (2a) to a part on the inner rim side of the drop center is formed by the forming roller (4).
May be finished simultaneously. For this purpose, the forming roller (4) is connected to the outer rim forming portion (4a), for example.
And an inner rim forming portion corresponding to a part of the drop center on the inner rim side.
【００１２】[0012]
【効果】本発明は上記構成であるから次の特有の効果を
有する。上記方法によれば、外リム(2a)の成形と裂開工
程とが一工程で完了するから、内リムを別工程によって
仕上げ成形するとしても、ドロップセンターが一方に偏
った自動車用ホイールの製造において、リム相当部(12)
をリム断面に成形するに要する時間が大幅に短縮でき
る。According to the present invention having the above configuration, the following specific effects are obtained. According to the above method, since the forming and tearing step of the outer rim (2a) are completed in one step, even if the inner rim is finished in a separate step, the production of an automobile wheel in which the drop center is biased to one side. In the rim equivalent part (12)
The time required to form the rim into a rim cross section can be greatly reduced.
【００１３】更に、この成形方法においては、リム相当
部(12)が単純な形状のものでもよいことから、被加工素
材(10)の鍛造工程まで含めた製造の所要時間の短縮が可
能となる。Further, in this molding method, since the rim-equivalent portion (12) may have a simple shape, it is possible to reduce the time required for production including the forging process of the workpiece (10). .
【００１４】[0014]
【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。図４〜図７に示す実施例は、図７に示すよ
うな、リム断面に対してディスク部(1) が外リム(2a)側
に大きく偏った形式の自動車用ホイールのリム断面の成
形に本発明を実施したものであり、最終仕上げ状態の凹
凸模様部(11)が形成されたディスク部(1) を具備する被
加工素材(10)を第１・第２金型(3a)(3b)によって挟圧保
持したままで前記被加工素材(10)のリム相当部(12)を外
リム(2a)および内リム(2b)に成形するようにしたもので
ある。Next, an embodiment of the present invention will be described in detail with reference to the drawings. The embodiment shown in FIGS. 4 to 7 is used for forming the rim section of an automobile wheel in which the disc portion (1) is largely biased toward the outer rim (2a) side with respect to the rim section as shown in FIG. In the present invention, a workpiece (10) having a disk portion (1) on which a concavo-convex pattern portion (11) in a final finished state is formed is first and second molds (3a) (3b). ), The rim-equivalent portion (12) of the material to be processed (10) is formed into the outer rim (2a) and the inner rim (2b) while holding the nip.
【００１５】このため、この実施例では、回転駆動装置
（図示せず）によって回転される第２金型(3b)の上方に
回転自在に支持された第１金型(3a)が昇降自在に対向配
置され、これらの金型の境界部の側方に成形ローラ(4)
を配置すると共に、これと対称な位置にスピニング加工
用のスピニングローラ(40)が配置される。（図４参照）
前記第１金型(3a)は、その端面(31)の表面形状を上記凹
凸模様部(11)の一方のそれに一致させると共に、この端
面(31)の周縁部からこれに続く胴部を第１環状型部(32)
とし、その断面形状をリム断面のドロップセンターの最
深部(2c)から外リム(2a)の端縁までの断面形状の内側の
輪郭に一致させている。For this reason, in this embodiment, the first mold (3a) rotatably supported above the second mold (3b) rotated by a rotary drive (not shown) is movable up and down. The forming rollers (4) are arranged opposite to each other and beside the boundary of these molds.
Are arranged, and a spinning roller (40) for spinning is arranged at a symmetrical position. (See Fig. 4)
In the first mold (3a), the surface shape of the end face (31) is made to conform to that of one of the concavo-convex pattern parts (11), and the trunk part following the peripheral part of the end face (31) is formed. 1 annular mold part (32)
The cross-sectional shape matches the inner contour of the cross-sectional shape from the deepest part (2c) of the drop center of the rim cross section to the edge of the outer rim (2a).
【００１６】他方の第２金型(3b)は、その端面(33)を、
上記凹凸模様部(11)の他方の表面形状に一致させると共
に、これに続く胴部を第２環状型部(34)とし、その断面
形状をリム断面のドロップセンターの最深部(2c)から内
リム(2b)の端縁までの断面形状の内側の輪郭に一致させ
ている。なお、この実施例において成形されるリム断面
のドロップセンター部の断面形状は全体として三角形状
となっており、外リム(2a)側に対して急傾斜し、他方の
内リム(2b)側の斜辺が緩やかに傾斜する構成となってい
る。そして、これらの斜辺の交点が上記最深部(2c)とな
る。更に、内リム(2b)は、このドロップセンターの内リ
ム(2b)側の傾斜辺部(2f)とこれに連続するシート部(2d)
及びリアフランジ部(2e)とから構成される。The other second mold (3b) has an end face (33)
A second annular mold part (34) is formed with the body part following the same as the other surface shape of the uneven pattern part (11), and its cross-sectional shape is changed from the deepest part (2c) of the drop center of the rim cross section. It matches the inner contour of the cross-sectional shape up to the edge of the rim (2b). The cross-sectional shape of the drop center portion of the rim cross section formed in this embodiment is triangular as a whole, is steeply inclined with respect to the outer rim (2a) side, and the other inner rim (2b) side. The hypotenuse is gently inclined. The intersection of these hypotenuses is the deepest part (2c). Further, the inner rim (2b) includes an inclined side portion (2f) on the inner rim (2b) side of the drop center and a seat portion (2d) connected to the inclined side portion (2f).
And a rear flange portion (2e).
【００１７】上記成形ローラ(4) は、直立姿勢に支持さ
れた状態で上下方向および水平方向に駆動されてリム相
当部(12)に押し込まれて既述のように裂開と成形を行な
うものであり、この実施例では、この成形ローラ(4) に
より外リム(2a)の全域からドロップセンターの内リム(2
b)側の一部までの範囲を成形できるようにしてある。こ
のため、成形ローラ(4) の中程には断面が嘴状となった
最大径部(41)が設けられ、この最大径部(41)から上方の
外周胴部が外リム成形部(4a)となり、その断面形状はリ
ム断面におけるドロップセンターの最深部(2c)から外リ
ム(2a)の端部までの外周面の形状に一致する。最大径部
(41)の下方の外周胴部は内リム成形部(4b)となり、その
断面形状はドロップセンターの最深部(2c)から内リム(2
b)の一部（ドロップセンターの内リム側の傾斜辺部(2f)
の一部）に一致させている。The forming roller (4) is driven vertically and horizontally while being supported in an upright position, and is pushed into the rim-equivalent portion (12) to perform tearing and forming as described above. In this embodiment, the inner roller (2) of the drop center is moved from the entire area of the outer rim (2a) by the forming roller (4).
b) The area up to a part of the side can be molded. For this reason, a maximum diameter portion (41) having a beak-shaped cross section is provided in the middle of the forming roller (4), and an outer peripheral body portion above the maximum diameter portion (41) is formed into an outer rim forming portion (4a). ), And its cross-sectional shape matches the shape of the outer peripheral surface from the deepest part (2c) of the drop center to the end of the outer rim (2a) in the rim cross-section. Maximum diameter
The outer trunk portion below (41) is the inner rim forming part (4b), and its cross-sectional shape is from the deepest part (2c) of the drop center to the inner rim (2c).
Part of b) (Sloped side (2f) on the inner rim side of the drop center
Part).
【００１８】スピニングローラ(40)としては通常の形式
のものが採用され、これの姿勢制御が可能で且移動経路
を制御できるようにした駆動装置によって第２環状型部
(34)に沿って移動される。この実施例の方法に採用する
被加工素材(10)のリム相当部(12)の断面形状は、上端か
ら下方に向かって薄肉となった略三角形状に設定され、
ディスク部(1) に対して下方に大きく突出するように形
成されたものとなっている。As the spinning roller (40), an ordinary type is employed, and the second annular mold portion is driven by a driving device capable of controlling the attitude of the spinning roller and controlling the movement path.
It is moved along (34). The cross-sectional shape of the rim-equivalent portion (12) of the material to be processed (10) employed in the method of this embodiment is set to be a substantially triangular shape that is thinner downward from the upper end,
It is formed so as to protrude greatly downward from the disk portion (1).
【００１９】なお、前記リム相当部(12)は、外リム相当
部(12a) と内リム相当部(12b) とに区分されるが、この
実施例では、既述の裂開線(P) を図４に示すように斜め
上方に向かって略Ｊ字状に屈曲する線としてあり、この
裂開線(P) の上方部分が外リム相当部(12a) となり、下
方部分が内リム相当部(12b) となる。この被加工素材(1
0)のリム相当部(12)を上記の金型および成形ローラ(4)
等を用いてリム断面に成形する方法について以下に詳述
する。The rim-corresponding portion (12) is divided into an outer rim-corresponding portion (12a) and an inner rim-corresponding portion (12b). In this embodiment, the tear line (P) described above is used. As shown in FIG. 4, the line is bent obliquely upward in a substantially J-shape. The upper part of the split line (P) is the outer rim equivalent part (12a), and the lower part is the inner rim equivalent part. (12b). This material (1
The rim equivalent part (12) of (0) is attached to the above-mentioned mold and forming roller (4).
A method for forming a rim cross section by using the method described above will be described in detail below.
【００２０】上記第２金型(3b)から第１金型(3a)を上方
に離反させた状態で前記第２金型(3b)に外嵌するように
被加工素材(10)をセットし、この状態で第１金型(3a)を
降下させてその端面(31)をディスク部(1) に対接させ
る。これにより、ディスク部(1) が端面(31)と端面(33)
によって挟圧され、被加工素材(10)が第２金型(3b)と一
体回動するように保持される。With the first mold (3a) separated from the second mold (3b) upward, the workpiece (10) is set so as to fit over the second mold (3b). In this state, the first mold (3a) is lowered to bring its end face (31) into contact with the disk (1). As a result, the disc (1) is moved between the end face (31) and the end face (33).
The workpiece (10) is held so as to rotate integrally with the second mold (3b).
【００２１】この状態で第２金型(3b)が回転駆動装置に
より回転されると、前記金型と被加工素材(10)とが一体
的に回転する。そして、図４のように、成形ローラ(4)
の最大径部(41)をリム相当部(12)の中程の所定の位置に
セットした後、裂開線(P) に沿って移動するように成形
ローラ(4) をリム相当部(12)に押し込む。すると、図５
に示すように、最大径部(41)がリム相当部(12)を上下に
裂開しながら外リム成形部(4a)が第１環状型部(32)に向
かって相対回転状態で移動し、内リム成形部(4b)が第２
金型(3b)の上部側に同様にして移動する。In this state, when the second mold (3b) is rotated by the rotation driving device, the mold and the workpiece (10) rotate integrally. Then, as shown in FIG. 4, the forming roller (4)
After setting the maximum diameter part (41) of the rim equivalent part (12) at a predetermined position in the middle of the rim equivalent part (12), the forming roller (4) is moved so as to move along the tearing line (P). ). Then, FIG.
As shown in the figure, the outer rim forming part (4a) moves in a relative rotation state toward the first annular mold part (32) while the maximum diameter part (41) tears the rim equivalent part (12) up and down. The inner rim forming part (4b) is the second
Move to the upper side of the mold (3b) in the same manner.
【００２２】このとき、最大径部(41)が一旦第２環状型
部(34)の上部に接近した後で最深部(2c)に一致するよう
に上記裂開線(P) が設定されていることから、成形ロー
ラ(4) による裂開および成形加工工程の前半部では、上
記裂開と共に、内リム相当部(12b) の部分が内リム成形
部(4b)によって大幅に展延されると共に、外リム相当部
(12a) の部分は、僅かに上方に押し上げられて変形され
る。（図５−ａ参照） そして、この加工工程の後半部では、第２環状型部(34)
と内リム成形部(4b)との間隔が小さくなっており、リム
相当部(12)の材料の下方（内リム(2b)側）への展延が抑
制された状態で外リム相当部(12a) 側が第１環状型部(3
2)側に効率的に塑性変形される。（図５−ｂ参照） 更に、最終的に最大径部(41)が最深部(2c)に一致すると
第１環状型部(32)と外リム成形部(4a)とがリム断面間隔
を置いて対向した状態となり、外リム相当部(12a) が外
リム(2a)に成形される。（図５−ｃ参照） このとき、ドロップセンターの内リム(2b)側の一部が同
時に成形される。なお、この実施例では、内リム成形部
(4b)は第２環状型部(34)の上部に平行な断面部と下端の
円弧状部とから構成されているから、また、内リム相当
部(12b) が上記のように展延されることから内リム相当
部(12b) の下端部は最終的には、図５−ｃに示すように
水滴状の断面の不完全成形部(12c) として残る。At this time, the cleavage line (P) is set so that the maximum diameter portion (41) once approaches the upper portion of the second annular mold portion (34) and then coincides with the deepest portion (2c). Therefore, in the first half of the tearing and forming process using the forming roller (4), the part corresponding to the inner rim (12b) is greatly extended by the inner rim forming part (4b) together with the above-described tearing. With the outer rim equivalent
The portion (12a) is slightly pushed upward and deformed. (See FIG. 5-a.) Then, in the second half of this processing step, the second annular mold part (34)
The distance between the inner rim forming part (4b) and the inner rim forming part (4b) is reduced, and the lower part of the material of the rim corresponding part (12) (the inner rim (2b) side) is suppressed. 12a) The first annular mold part (3
2) It is efficiently plastically deformed to the side. (See FIG. 5-b.) Further, when the maximum diameter portion (41) finally coincides with the deepest portion (2c), the first annular mold portion (32) and the outer rim molding portion (4a) are spaced apart from each other by the rim cross section. The outer rim-equivalent portion (12a) is formed into the outer rim (2a). At this time, a part of the drop center on the inner rim (2b) side is simultaneously formed. In this embodiment, the inner rim forming portion
(4b) is composed of a cross section parallel to the upper part of the second annular mold part (34) and an arcuate part at the lower end, and the inner rim equivalent part (12b) is extended as described above. Therefore, the lower end portion of the inner rim-equivalent portion (12b) ultimately remains as an incompletely formed portion (12c) having a water-drop-shaped cross section as shown in FIG.
【００２３】そして、本実施例では、上記の加工工程に
続いて、成形ローラ(4) を、図５−ｄに示すように、内
リム成形部(4b)が第２環状型部(34)の上部と内リム(2b)
の厚み分を隔てて対向した状態を維持しながら下方向に
移動させて、前記不完全成形部(12c) の一部をドロップ
センターの内リム(2b)側の一部として成形して、この内
リム側の大部分が仕上がる。In this embodiment, following the above-described processing step, the forming roller (4) is moved to the inner rim forming part (4b) as shown in FIG. Top and inner rim (2b)
By moving downwardly while maintaining the facing state with a thickness of the thickness of the drop center, a part of the incompletely formed part (12c) is formed as a part on the inner rim (2b) side of the drop center. Most of the inner rim side is finished.
【００２４】更に、この後、残りの不完全部を、図６及
び図７に示すように、スピニングローラ(40)を用いたス
ピニングロール加工によってシート部(2d)の一部及びリ
アフランジ部(2e)に成形してリム断面全体の成形が完了
する。なお、この実施例では、図４のように第１・第２
金型(3a)(3b)の境界部を挟んで対向する位置に成形ロー
ラ(4) とスピニングローラ(40)が配設され、しかも、こ
れらが各別に所定の経路および所定の姿勢で被加工部に
加圧される構成であるから、上記各成形加工が連続的に
行なえる。Further, thereafter, as shown in FIGS. 6 and 7, a part of the sheet portion (2d) and a rear flange portion (2d) are formed by spinning roll processing using a spinning roller (40), as shown in FIGS. Forming in 2e) completes forming the entire rim section. In this embodiment, as shown in FIG.
A forming roller (4) and a spinning roller (40) are arranged at positions facing each other across the boundary between the molds (3a) and (3b), and these are separately processed in a predetermined path and a predetermined posture. Since the pressure is applied to the portion, each of the above-mentioned forming processes can be performed continuously.
【００２５】したがって、リム相当部(12)の裂開と外リ
ム(2a)およびドロップセンター部の成形とが同時に行え
ることは勿論不完全成形部(12c) を内リム(2b)に成形す
る工程が連続的に行なえるから、リム断面部の成形所要
時間が一層短縮できる。上記実施例では、第１・第２金
型(3a)(3b)によってディスク部(1) の全体を挟持する方
式としたが、図９のようにディスク部(1) の周縁部のみ
を端面(31)の周縁部と端面(33)の周縁部によって挟圧保
持する構成とすることも出来る。Therefore, not only can the tearing of the rim-equivalent portion (12) and the forming of the outer rim (2a) and the drop center portion be performed simultaneously, but also the step of forming the incompletely formed portion (12c) into the inner rim (2b). Can be performed continuously, so that the time required for forming the rim cross section can be further reduced. In the above-described embodiment, the entire disk portion (1) is sandwiched by the first and second molds (3a) and (3b). However, as shown in FIG. It is also possible to adopt a configuration in which the pressure is held by the peripheral portion of (31) and the peripheral portion of the end surface (33).
【００２６】この場合は、同図に示すように、ディスク
部(1) の凹凸模様部(11)に相当する範囲よりも広く且こ
の部分の凹凸の突出度合いよりも深い凹陥部(35)を第１
金型(3a)の端面(31)に形成すると共に同様の凹陥部(36)
を他方の第２金型(3b)の端面(33)に形成すればよい。こ
の様に構成した第１・第２金型(3a)(3b)を用いる場合に
は、所謂ツーピースタイプの自動車用ホイールのリム体
が同様の方法によって加工できる。前記リム体は、リム
部と取付けフランジとからなり、この取付けフランジに
ディスク部(1) がネジ止めされるが、前記リム体の成形
に際しては、被加工素材(10)はリム相当部(12)の内周側
に前記取付けフランジを張り出させた構成とし、この取
付けフランジを端面(31)の凹陥部(35)の外周域および端
面(33)の外周域によって挟圧すれば、第１・第２金型(3
a)(3b)により前記被加工素材(10)を保持できることとな
る。（図１０参照） 尚、最深部(2c)から内リム(2b)の端縁までの範囲の全体
をスピニングロール加工によって成形する場合には、成
形ローラ(4) としては、図１１に示すように、外リム成
形部(4a)のみを具備する形状としても良い。In this case, as shown in the figure, a concave portion (35) wider than the range corresponding to the concave / convex pattern portion (11) of the disk portion (1) and deeper than the degree of protrusion of the concave / convex portion of this portion is provided. First
Formed on the end surface (31) of the mold (3a) and similar recesses (36)
May be formed on the end surface (33) of the other second mold (3b). When the first and second dies (3a) and (3b) configured as described above are used, a so-called two-piece type rim of an automobile wheel can be processed by a similar method. The rim body includes a rim portion and a mounting flange, and a disk portion (1) is screwed to the mounting flange. When the rim body is formed, the material to be processed (10) is a rim equivalent portion (12). ), The mounting flange is extended on the inner peripheral side, and the mounting flange is sandwiched between the outer peripheral area of the concave portion (35) of the end face (31) and the outer peripheral area of the end face (33).・ Second mold (3
By a) and (3b), the workpiece (10) can be held. (See FIG. 10) When the entire area from the deepest part (2c) to the edge of the inner rim (2b) is formed by spinning roll processing, the forming roller (4) is as shown in FIG. Alternatively, a shape having only the outer rim forming portion (4a) may be adopted.
【００２７】又、上記実施例の被加工素材(10)のリム相
当部(12)は、その外周面が寸胴型となっているが、これ
を図１０のように、外リム相当部(12a) 側の端部にフラ
ンジ部(13)を具備する形状としてもよい。この場合に
は、予めフランジ部(13)が半径方向外側に突出している
から、その分、裂開深さを浅くでき、外リム(2a)を成形
するための加工所要時間が短縮できる。The rim-equivalent portion (12) of the material to be processed (10) in the above embodiment has an outer peripheral surface of a small body type. As shown in FIG. ) -Side end may be provided with a flange portion (13). In this case, since the flange portion (13) protrudes outward in the radial direction in advance, the tearing depth can be reduced accordingly, and the processing time required for forming the outer rim (2a) can be reduced.
【００２８】更に、上記何れの実施例でも、リム部のド
ロップセンター部から内リム(2b)端部にかけての範囲が
滑らかな傾斜面としたが、これを図１２のようにドロッ
プセンター部が局部的に凹む形状としてもよい。この場
合、成形ローラ(4) の内リム成形部(4b)を、ドロップセ
ンターの最深部(2c)とシート部(2d)とをつなぐ傾斜辺部
(2f)と平行な断面の第１テーパ胴部(4c)と、これに連続
し且前記第１テーパ胴部(4c)より小さいテーパの第２テ
ーパ胴部(4d)とから構成する。そして、成形ローラ(4)
によるロール加工を既述の実施例と同様の手順で実施し
て、外リム(2a)及びドロップセンターからシート部(2d)
の一部までを成形する。（図１２−ａ〜ｄ参照） この後、シート部(2d)の未成形部及びリアフランジ部(2
e)を別のロール加工によって仕上げる。（図１２−ｅ参
照） 尚、前記第２テーパ胴部(4d)はなくてもよいが、上記の
ものでは、前記加工工程の初期の裂開段階において、こ
の第２テーパ胴部(4d)が内リム(2b)側のリム相当部(12)
の外周側への流れを抑制しながら内リム(2b)端部方向へ
展延する（図１２−ｂ）から、この後の内リム(2b)側の
成形段階に際して、その加工性が向上する。又、上記の
ものでは、第１テーパ胴部(4c)を前記傾斜辺部(2f)と平
行としているが、これを傾斜辺部(2f)より大きいテーパ
としてもよい。Further, in each of the above embodiments, the range from the drop center portion of the rim portion to the end of the inner rim (2b) is a smooth inclined surface. The shape may be concave. In this case, the inner rim forming part (4b) of the forming roller (4) is connected to the deepest part (2c) of the drop center and the inclined side part connecting the sheet part (2d).
It comprises a first tapered body (4c) having a cross section parallel to (2f) and a second tapered body (4d) continuous with the first tapered body (4c) and having a smaller taper than the first tapered body (4c). And forming roller (4)
Roll processing is performed in the same procedure as in the above-described embodiment, and the outer rim (2a) and the drop center to the sheet portion (2d).
Up to a part of. (See FIGS. 12A to 12D.) Thereafter, the unformed portion of the seat portion (2d) and the rear flange portion (2D)
e) is finished by another roll processing. (See FIG. 12-e.) The second tapered body (4d) may be omitted, but in the above case, the second tapered body (4d) is used in the initial tearing stage of the working process. Is the rim equivalent part on the inner rim (2b) side (12)
Is spread toward the end of the inner rim (2b) while suppressing the flow to the outer peripheral side of the inner rim (2b) (FIG. 12-b). . In the above, the first tapered body (4c) is parallel to the inclined side (2f). However, the first tapered body (4c) may have a taper larger than the inclined side (2f).
【００２９】そして、上記何れの実施例においても、リ
ム相当部(12)の体積は、最終的に形成されたリム部のそ
れよりも僅かに大きく設定されていることはいうまでも
ない。更に、既述した何れの実施例の場合でも、内リム
(2b)側をスピニング加工用の別の金型に装着し直して加
工成形する場合には、前記第２金型(3b)の外周胴部に
は、前記内リム成形型部(34)を設けておく必要がない。In any of the above embodiments, it is needless to say that the volume of the rim-equivalent portion (12) is set slightly larger than that of the finally formed rim portion. Further, in any of the embodiments described above, the inner rim
When the (2b) side is remounted in another die for spinning and is formed by processing, the inner rim forming die (34) is provided on the outer peripheral body of the second die (3b). There is no need to provide it.
【００３０】又、本実施例においては、被加工素材(10)
を挟圧保持する第１・第２金型(3a)(3b)は上下に対向す
るように配設されるが、これを左右に対向するように配
設してもよい。この場合、上記各部を支持あるいは駆動
する付属装置もこれらに対応して配設される。尚、既述
した実施例（図４〜図７に示したもの）において、成形
ローラ(4) の内リム成形部(4b)の上部の断面は、第２環
状型部(34)と平行としているが、これを、図８に示すよ
うに、前記第２環状型部(34)より大きいテーパとしても
よい。In this embodiment, the material to be processed (10)
Although the first and second molds (3a) and (3b) for holding the pressure are arranged to face up and down, they may be arranged to face left and right. In this case, an auxiliary device for supporting or driving each of the above-mentioned parts is also provided correspondingly. In the above-described embodiment (shown in FIGS. 4 to 7), the cross section of the upper portion of the inner rim forming portion (4b) of the forming roller (4) is parallel to the second annular mold portion (34). However, as shown in FIG. 8, this may be a taper larger than the second annular portion (34).
【００３１】又、以上の実施例において、裂開線(P) は
必ずしもＪ字状に限定されるものではなく、例えば、Ｌ
字状であってもよい（図８参照）。この裂開線(P) は、
リム相当部(12)の断面形状と成形ローラ(4) の形状との
関係で決定される。In the above embodiment, the cleavage line (P) is not necessarily limited to a J-shape.
It may be in the shape of a letter (see FIG. 8). This cleavage line (P) is
It is determined by the relationship between the cross-sectional shape of the rim-equivalent portion (12) and the shape of the forming roller (4).
【図１】従来の方法における裂開初期の状態の断面図FIG. 1 is a cross-sectional view of a conventional method at an early stage of cleavage.
【図２】従来の方法における裂開終了状態の断面図FIG. 2 is a cross-sectional view showing a state in which a tearing is completed in a conventional method.
【図３】従来の方法におけるロール成形加工完了時の断
面図FIG. 3 is a cross-sectional view at the time of completion of roll forming in a conventional method.
【図４】被加工素材(10)をセットした状態の断面図FIG. 4 is a cross-sectional view showing a state in which a workpiece (10) is set.
【図５】成形ローラ(4) による加工工程を示す要部断面
図FIG. 5 is a sectional view of an essential part showing a processing step by a forming roller (4).
【図６】内リム(2b)端部のスピニング加工中の状態を示
す断面図FIG. 6 is a sectional view showing a state during the spinning of the end of the inner rim (2b).
【図７】加工完了時のホイールの断面図FIG. 7 is a cross-sectional view of the wheel when processing is completed.
【図８】成形ローラ(4) の内リム成形部(4b)の他の形式
を示す断面図FIG. 8 is a sectional view showing another type of the inner rim forming portion (4b) of the forming roller (4).
【図９】他の形式の第１・第２金型(3a)(3b)を使用する
場合の断面図FIG. 9 is a cross-sectional view when using other types of first and second molds (3a) and (3b).
【図１０】リム相当部(12)の形状を変えた場合の説明図FIG. 10 is an explanatory diagram when the shape of the rim equivalent part (12) is changed.
【図１１】他の形式の成形ローラ(4) を使用する場合の
断面図FIG. 11 is a sectional view when another type of forming roller (4) is used.
【図１２】ドロップセンターが凹む形状のリム断面を加
工する場合の要部断面図FIG. 12 is a cross-sectional view of a main part when a rim cross section in which a drop center is concave is machined.
(10)・・・被加工素材 (12)・・・リム相当部 (1) ・・・ディスク部 (3a)・・・第１金型 (3b)・・・第２金型 (2a)・・・外リム (32)・・・第１環状型部 (4) ・・・成形ローラ (41)・・・最大径部 (4a)・・・外リム成形部 (4b)・・・内リム成形部 (2f)・・・傾斜辺部 (10) ・ ・ ・ Material to be processed (12) ・ ・ ・ Rim equivalent part (1) ・ ・ ・ Disk part (3a) ・ ・ ・ First mold (3b) ・ ・ ・ Second mold (2a) ・..Outer rim (32) ・ ・ ・ First annular mold part (4) ・ ・ ・ Forming roller (41) ・ ・ ・ Maximum diameter part (4a) ・ ・ ・ Outer rim forming part (4b) ・ ・ ・ Inner rim Molded part (2f) ・ ・ ・ Sloped side
Claims (3)
部(12)を裂開とロール成形の組み合わせによって、自動
車用ホイールのリム部に成形する方法において、被加工
素材(10)は、環状に***したリム相当部(12)の内周にデ
ィスク部(1) 、又は、取付フランジ部を一体形成した構
成とし、被加工素材(10)におけるリム相当部(12)の内周
域を一対の第１・第２金型(3a)(3b)によって挟圧保持
し、これら金型の境界部外周にこれらと相対回転し且前
記境界部に向って移動可能に支持された成形ローラ(4)
を配置し、前記第１金型(3a)の端面側の外周胴部には、
外リム(2a)の断面に適合させた第１環状型部(32)を形成
し、前記成形ローラ(4) は、その最大径部(41)から一方
の端部までを外リム成形部(4a)とすると共に、この外リ
ム成形部(4a)の外周面はドロップセンターの一部から外
リム(2a)端部までの形状に一致させ、成形ローラ(4) の
最大径部(41)をリム相当部(12)内に所定経路で押し込ん
で外リム成形部(4a)を最終的に第１環状型部(32)に対向
させることにより、外リム(2a)断面を成形するようにし
た自動車用ホイールのリム部成形方法。A method of forming a rim-equivalent portion (12) of a workable material (10) capable of plastic working into a rim portion of an automobile wheel by a combination of tearing and roll forming. The disk part (1) or the mounting flange part is formed integrally with the inner periphery of the rim-equivalent part (12) protruding in an annular shape, and the inner periphery of the rim-equivalent part (12) in the workpiece (10) is The region is clamped and held by a pair of first and second molds (3a) and (3b), and is formed on the outer periphery of the boundary between these dies so as to rotate relative thereto and to be movable toward the boundary. Roller (4)
Is disposed on the outer peripheral body on the end face side of the first mold (3a),
A first annular mold portion (32) adapted to the cross section of the outer rim (2a) is formed, and the forming roller (4) extends from the maximum diameter portion (41) to one end of the outer rim forming portion (32). 4a), and the outer peripheral surface of the outer rim forming portion (4a) matches the shape from a part of the drop center to the end of the outer rim (2a), and the maximum diameter portion (41) of the forming roller (4) Into the rim equivalent part (12) by a predetermined path so that the outer rim forming part (4a) finally faces the first annular mold part (32) so that the outer rim (2a) cross section is formed. Of forming a rim of an automotive wheel.
よってドロップセンターの一部から外リム(2a)の端部外
周面までの形状に仕上げた後、他の部分を、ロール加工
によって対応する断面部に仕上げるようにした請求項１
に記載の自動車用ホイールのリム部成形方法。2. A part of a rim-equivalent part (12) is formed by a forming roller (4) into a shape from a part of a drop center to an outer peripheral surface of an end of an outer rim (2a). 2. The method according to claim 1, wherein the corresponding cross-section is finished by roll processing.
4. The method for forming a rim of a vehicle wheel according to claim 1.
内リム成形部(4b)を具備する構成とし、この内リム成形
部(4b)における最大径部(41)に続く所定範囲をテーパ部
とし、このテーパ部のテーパをドロップセンターの内リ
ム側の傾斜辺部(2f)のそれ以上に設定した請求項１又は
請求項２に記載の自動車用ホイールのリム部成形方法。3. The forming roller (4) is provided with an inner rim forming part (4b) following the outer rim forming part (4a), and follows the maximum diameter part (41) in the inner rim forming part (4b). 3. The method for forming a rim portion of a vehicle wheel according to claim 1, wherein the predetermined range is a tapered portion, and the taper of the tapered portion is set to be equal to or larger than the inclined side portion (2f) on the inner rim side of the drop center. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4011793A JP2732185B2 (en) | 1993-03-01 | 1993-03-01 | Method for forming rim of automobile wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4011793A JP2732185B2 (en) | 1993-03-01 | 1993-03-01 | Method for forming rim of automobile wheel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06246382A JPH06246382A (en) | 1994-09-06 |
| JP2732185B2 true JP2732185B2 (en) | 1998-03-25 |
Family
ID=12571896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4011793A Expired - Lifetime JP2732185B2 (en) | 1993-03-01 | 1993-03-01 | Method for forming rim of automobile wheel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2732185B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101599967B1 (en) * | 2014-02-21 | 2016-03-04 | (주)현진테크 | Mold structure of the forming machine for tire rim of heavy equipment vehicle |
| JP5840813B1 (en) * | 2015-06-24 | 2016-01-06 | 旭テック株式会社 | Flow forming molding apparatus and flow forming molding method |
-
1993
- 1993-03-01 JP JP4011793A patent/JP2732185B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06246382A (en) | 1994-09-06 |
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