JPH0891005A - Manufacture of rim for automotive wheel - Google Patents
Manufacture of rim for automotive wheelInfo
- Publication number
- JPH0891005A JPH0891005A JP22766294A JP22766294A JPH0891005A JP H0891005 A JPH0891005 A JP H0891005A JP 22766294 A JP22766294 A JP 22766294A JP 22766294 A JP22766294 A JP 22766294A JP H0891005 A JPH0891005 A JP H0891005A
- Authority
- JP
- Japan
- Prior art keywords
- rim
- plate
- shape
- thickness
- shaped material
- 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
Landscapes
- Tires In General (AREA)
- Forging (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は自動車ホイール用リムの
製造方法に関する。FIELD OF THE INVENTION The present invention relates to a method for manufacturing a rim for an automobile wheel.
【０００２】[0002]
【従来の技術】従来、自動車ホイールは、成形加工のも
のと鋳造のものとに大別される。このうち、成形加工の
ホイールは、そのリムは次のようにして製造される。ま
ず、均一な板厚の帯状板を矩形状の板状素材に切断す
る。ついで、板状素材を丸める。ついで、丸められた板
の丸め方向両端部を溶接して円筒状素管となす。つい
で、円筒状素管の軸方向両端部を拡径する。ついで、両
端が拡径された筒状管を成形ロールでリム形に成形す
る。2. Description of the Related Art Conventionally, automobile wheels are roughly classified into molded products and cast products. Of these, the rim of the molded wheel is manufactured as follows. First, a strip plate having a uniform plate thickness is cut into a rectangular plate material. Then, the plate material is rolled. Then, both ends of the rolled plate in the rolling direction are welded to form a cylindrical shell. Then, the diameters of both ends in the axial direction of the cylindrical raw tube are expanded. Then, a tubular tube whose both ends are expanded is formed into a rim shape by a forming roll.
【０００３】[0003]
【発明が解決しようとする課題】しかし、ホイール用リ
ムの形状は複雑に屈曲しているため、局部的な応力集中
が生じる。それにもかかわらず、従来のホイール用リム
は均一な板厚の素材からほぼ均一な肉厚のリムを成形
し、その場合最も強度上厳しい部位に厚さを合せる必要
があるので、部位によっては強度に余裕があり過ぎ不必
要な重量増を招いてしまうという問題があった。本発明
の目的は、強度の余り過ぎとそれによる重量増を招かな
いようにできる自動車ホイール用リムの製造方法を提供
することにある。However, since the shape of the wheel rim is complicatedly bent, local stress concentration occurs. Nonetheless, conventional wheel rims must be molded from a material with a uniform thickness to form a rim with a substantially uniform thickness, and in that case it is necessary to match the thickness to the most severe part in terms of strength. However, there was a problem that there was too much room and the weight was increased unnecessarily. An object of the present invention is to provide a method for manufacturing a rim for an automobile wheel, which can prevent excessive strength and increase in weight due to it.
【０００４】[0004]
【課題を解決するための手段】上記目的は本発明によれ
ば次の本発明の方法によって達成される。板状素材を用
意し、前記板状素材を円筒状に丸めて周方向両端部を突
合せ、前記突合わされた両端部を溶接接合して円筒状素
管となし、前記円筒状素管の軸方向両端部を拡径して両
端拡径筒状管となし、前記両端拡径筒状管を成形ロール
でリム形に成形する、工程からなる自動車ホイール用リ
ムの製造方法において、前記板状素材の段階で、リム形
に成形後に軸方向にＲ形状をなす部分を該部分に接続し
て軸方向とほぼ直線状に延びる部分よりも厚さ大として
おく自動車ホイール用リムの製造方法。According to the present invention, the above object is achieved by the following method of the present invention. Prepare a plate-shaped material, round the plate-shaped material into a cylindrical shape, but abut both ends in the circumferential direction, and weld and join the abutted both ends to form a cylindrical raw pipe, the axial direction of the cylindrical raw pipe In the method for manufacturing a rim for an automobile wheel, which comprises a step of expanding both ends to form a tubular tube with both ends expanded and forming the tube with both ends expanded into a rim shape with a forming roll, A method of manufacturing a rim for an automobile wheel, wherein, in a step, a portion having an R shape in the axial direction after being formed into a rim shape is connected to the portion to have a larger thickness than a portion extending substantially linearly in the axial direction.
【０００５】[0005]
【作用】タイヤ接地圧がタイヤを介してリムにかかった
ときにリムに生じる軸方向曲げ応力を測定すると、リム
のうち軸方向にＲ形状をなす部分に生じる応力が、それ
に接続する軸方向にほぼ直線状に延びる部分に生じる応
力より大きいことがわかった。本発明では、Ｒ部に生じ
る厚さをそれに続く直線部より大としたので、Ｒ部に生
じる応力を緩和でき、十分に繰り返し荷重に耐えること
ができ、それに続く直線部は従来肉が余っていたのを低
減できて重量軽減がはかれる。なお、現在の金属板製造
技術では、ロールの長手方向位置に従って径を変化させ
たロールで圧延することにより、幅方向に厚さを変化さ
せた金属板は製造可能である。When the axial bending stress generated in the rim when the tire ground pressure is applied to the rim through the tire is measured, the stress generated in the axially R-shaped portion of the rim is measured in the axial direction connected to the rim. It was found that the stress was larger than the stress generated in the substantially linearly extending portion. In the present invention, since the thickness generated in the R portion is made larger than that of the straight line portion that follows, the stress generated in the R portion can be relaxed, and the repeated load can be sufficiently endured. The amount of flutter can be reduced and the weight can be reduced. In the current metal plate manufacturing technology, a metal plate having a thickness changed in the width direction can be manufactured by rolling with a roll having a diameter changed according to the position of the roll in the longitudinal direction.
【０００６】[0006]
【実施例】図１〜図３は本発明の実施例を示しており、
図４は従来ホイールの応力データを示している。図３に
示すように、本発明の自動車ホイール用リムの製造方法
は、（イ）スチール製又はアルミ合金製の板状素材１を
用意する工程と、（ロ）板状素材１をその長手方向（Ｌ
方向）にコイラー２で円筒状に丸める工程と（丸められ
たものを３で示す）、（ハ）丸められたものの周方向両
端部を突合せ溶接して、円筒状素管４となす工程と（溶
接部を５で示す）、（ニ）円筒状素管４の軸方向両端部
を拡径して両端拡径筒状管６となす工程と、（ホ）一番
成形ロール７にて成形し、（ヘ）二番成形ロール８にて
成形し、（ト）三番成形ロール９にて順次成形してい
き、最終形状のリム形をもつリム１０に成形する工程
と、から成る。1 to 3 show an embodiment of the present invention,
FIG. 4 shows stress data of a conventional wheel. As shown in FIG. 3, the method of manufacturing a rim for an automobile wheel according to the present invention includes (a) a step of preparing a plate-shaped material 1 made of steel or an aluminum alloy, and (b) the plate-shaped material 1 in the longitudinal direction thereof. (L
Direction) in the form of a cylinder with a coiler 2 (the rounded one is indicated by 3), and (c) a step of butt-welding both ends of the rolled one in the circumferential direction to form a cylindrical raw tube 4 ( (The welded portion is indicated by 5), (d) a step of expanding both axial end portions of the cylindrical raw pipe 4 to form the expanded tubular pipes 6 at both ends, and (e) forming with the first forming roll 7. , (F) forming with the second forming roll 8 and (g) forming sequentially with the third forming roll 9 to form a rim 10 having a rim shape of the final shape.
【０００７】ここで、（イ）の板状素材１を用意する工
程において、図２に示すように、板状素材１は、幅方向
各部でその厚さを変化されており、リム形状に成形され
た時に軸方向にＲ（湾曲）形状をなす部分はそれに続く
ほぼ直線状に延びる部分よりも厚さを大としてある。リ
ム形状に形成された時に軸方向にＲ形状をなす部分とし
ては、図１に示すように、たとえばフランジ部１１、１
２とビードシート部１３、１４との接続部１５、１６、
およびビードシート部１４とハンプ部１７との接続部１
８、およびビードシート部１３またはハンプ部１７とド
ロップ部側壁１９、２０との接続部２１、２２、および
ドロップ部側壁１９、２０とドロップ部底壁２３との接
続部２４、２５がある。また、直線状部としてはリムビ
ードシート部１３、１４、ハンプ部１７、ドロップ部側
壁１９、２０、ドロップ部底壁２３がある。図２の板状
素材１にも図１と対応させるために、各部にリム形出し
後の符号を付してある。厚さの変化は段つき状ではなめ
らかに変化させてあり、応力集中を抑制してある。ま
た、厚さの変化は、圧延を容易とするために、板状素材
１の片面のみを凹凸させることによりつけてある。そし
て、この凹凸面の方を丸めるときの内側にもってくるよ
うにする。それは、リム形を出した後、タイヤのビード
部が着座されたときに、ビード部と全面接触でき、気密
を確実にするためである。Here, in the step (a) of preparing the plate-shaped raw material 1, as shown in FIG. 2, the plate-shaped raw material 1 has its thickness changed at each portion in the width direction and is formed into a rim shape. The portion having an R (curved) shape in the axial direction when pressed is thicker than the portion that extends in a substantially straight line following the portion. As shown in FIG. 1, for example, the flange portions 11 and 1 may be used as the portion that forms the R shape in the axial direction when formed into the rim shape.
2, the connection portions 15 and 16 between the bead seat portions 13 and 14,
And a connecting portion 1 between the bead seat portion 14 and the hump portion 17.
8 and the connection portions 21 and 22 between the bead seat portion 13 or the hump portion 17 and the drop portion side walls 19 and 20, and the connection portions 24 and 25 between the drop portion side walls 19 and 20 and the drop portion bottom wall 23. The linear portions include the rim bead seat portions 13 and 14, the hump portion 17, the drop portion side walls 19 and 20, and the drop portion bottom wall 23. In order to correspond to FIG. 1, the plate-shaped material 1 in FIG. 2 is also provided with the reference numeral after the rim is formed. The thickness changes smoothly in a stepped manner to suppress stress concentration. Further, the change in thickness is provided by making only one surface of the plate-shaped material 1 uneven so as to facilitate rolling. Then, the uneven surface should be brought inside when rolling. This is for ensuring the airtightness by allowing full contact with the bead portion of the tire when the bead portion of the tire is seated after the rim shape is formed.
【０００８】Ｒ部を肉厚大とする理由を、図４を参照し
て説明する。図４は、均一厚さの板状素材から製作した
従来リムのフランジ部のビードシート部に、タイヤ接地
圧荷重に相当する荷重をリムの径方向にかけたときに、
リムに生じる軸方向曲げ応力を、ストレンゲージをリム
に貼付して測定した結果を示している。ここで、タイヤ
からリムにかかるタイヤ圧荷重を考慮しないのは、リム
に亀裂を発生させ損傷させる荷重は車輪の回転毎に繰り
返しかかる接地圧荷重であって、定常的にかかるタイヤ
圧荷重ではないからである。図４から明らかなように、
リムの各Ｒ部にはそれに接続する直線部より大きな曲げ
応力が生じており、各Ｒ部で極大値をとっている。各Ｒ
部の厚さを上記極大値に耐えるだけの厚さとし、それに
続く直線部の厚さを小とすることにより、従来リムに比
べて、直線部に生じていた強度の余裕分が低減され、重
量が低減されている。The reason why the thickness of the R portion is increased will be described with reference to FIG. FIG. 4 shows that when a load corresponding to a tire ground pressure load is applied in the radial direction of the rim to the bead seat portion of the flange portion of the conventional rim manufactured from a plate-shaped material having a uniform thickness,
The result of measuring the axial bending stress generated in the rim by attaching a strain gauge to the rim is shown. Here, what does not consider the tire pressure load applied from the tire to the rim is that the load that causes the rim to crack and damage is the ground pressure load repeatedly applied for each rotation of the wheel, and not the tire pressure load applied steadily. Because. As is clear from FIG.
A bending stress larger than that of the straight portion connected to each R portion of the rim is generated, and each R portion has a maximum value. Each R
By making the thickness of the part to withstand the above maximum value and making the thickness of the straight part that follows it smaller, the strength margin generated in the straight part is reduced compared to the conventional rim, and the weight Has been reduced.
【０００９】上記の条件を満足するように各部の厚さを
決定した一例のリムの寸法を示すと次の通りである。 The dimensions of an example rim in which the thickness of each part is determined so as to satisfy the above conditions are as follows.
【００１０】つぎに、作用を説明する。上記のようにし
て、上記板状素材１から製造されたリムは、リム形出し
後、そのＲ部がそれぞれそれに続く直線部よりも増厚さ
れた状態にあるので、リムにタイヤ接地圧荷重が車両走
行中に繰り返しかかっても、その応力レベルは小さくな
り、耐疲労強度が向上される。また、直線部は従来に比
べて減厚となるので、重量軽減がはかれ、車両の燃費向
上に寄与できる。直線部は減厚しても、もともと応力レ
ベルが小さいので、耐久性上問題は生じない。Next, the operation will be described. As described above, the rim manufactured from the plate-shaped material 1 is in a state in which, after the rim has been formed, the R portions thereof are thicker than the linear portions that follow respectively, so that the tire ground pressure load is applied to the rim. Even if it is repeatedly applied while the vehicle is running, the stress level is reduced and the fatigue strength is improved. Further, since the straight line portion is thinner than the conventional one, the weight can be reduced and the fuel consumption of the vehicle can be improved. Even if the thickness of the straight line portion is reduced, the stress level is originally small, so there is no problem in terms of durability.
【００１１】[0011]
【発明の効果】本発明によれば、板状素材段階で、リム
形出し後Ｒ形状をなす部分の厚さを大としそれに続く直
線状部分の厚さを小とした素材を用いてリムを製造する
ようにしたので、リム製造後、Ｒ部を必要強度に保ち他
の部分を従来リムに比べて薄くして軽量としたリムを提
供できる。According to the present invention, at the stage of plate material, the rim is formed by using a material in which the thickness of the R-shaped portion after forming the rim is large and the thickness of the subsequent linear portion is small. Since the rim is manufactured, it is possible to provide a rim in which after the rim is manufactured, the R portion is kept to have a necessary strength and the other parts are thinner and lighter than the conventional rim.
【図１】本発明の一実施例の自動車ホイール用リムの製
造方法で製造したリムの断面図である。FIG. 1 is a cross-sectional view of a rim manufactured by a method for manufacturing an automobile wheel rim according to an embodiment of the present invention.
【図２】図１のリム製造で用いた板状素材の端面図（図
３でＡ方向から見た端面図）である。2 is an end view of the plate-shaped material used in the rim manufacturing of FIG. 1 (end view as seen from the direction A in FIG. 3).
【図３】本発明の一実施例の自動車ホイール用リムの製
造方法を工程順で示したリムの断面図および斜視図であ
る。3A and 3B are a cross-sectional view and a perspective view of a rim showing, in the order of steps, a method for manufacturing an automobile wheel rim according to an embodiment of the present invention.
【図４】均一肉厚リムにタイヤ接地圧荷重がかかったと
きの軸方向曲げ応力図である。FIG. 4 is an axial bending stress diagram when a tire contact pressure load is applied to a uniformly thick rim.
１ 板状素材 １０ リム １５、１６、１８、２１、２２、２４、２５ Ｒ部 1 Plate material 10 Rim 15, 16, 18, 21, 22, 24, 25 R part
Claims (1)
し、 前記円筒状素管の軸方向両端部を拡径して両端拡径筒状
管となし、 前記両端拡径筒状管を成形ロールでリム形に成形する、
工程からなる自動車ホイール用リムの製造方法におい
て、 前記板状素材を用意する工程で、リム形に成形後に軸方
向にＲ形状をなす部分を該部分に接続して軸方向とほぼ
直線状に延びる部分よりも厚さ大としておくことを特徴
とする自動車ホイール用リムの製造方法。1. A plate-shaped material is prepared, the plate-shaped material is rolled into a cylindrical shape, and both ends in the circumferential direction are abutted, and the abutted both ends are weld-joined to form a cylindrical raw pipe, the cylindrical shape The both ends in the axial direction of the raw pipe are expanded to form a tubular pipe with both ends expanded, and the tubular pipe with both ends expanded is formed into a rim shape with a forming roll.
A method of manufacturing a rim for an automobile wheel, which comprises the steps of: preparing a plate-shaped material; connecting a portion having an R shape in the axial direction after being formed into a rim shape to the portion and extending substantially linearly with the axial direction. A method for manufacturing a rim for an automobile wheel, which is characterized in that the thickness is made larger than that of the portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22766294A JPH0891005A (en) | 1994-09-22 | 1994-09-22 | Manufacture of rim for automotive wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22766294A JPH0891005A (en) | 1994-09-22 | 1994-09-22 | Manufacture of rim for automotive wheel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0891005A true JPH0891005A (en) | 1996-04-09 |
Family
ID=16864376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22766294A Pending JPH0891005A (en) | 1994-09-22 | 1994-09-22 | Manufacture of rim for automotive wheel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0891005A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004067294A1 (en) | 2003-01-28 | 2004-08-12 | Topy Kogyo Kabushiki Kaisha | Unequally thick rim, and method of manufacturing the rim |
| JP2006168597A (en) * | 2004-12-17 | 2006-06-29 | Chuo Motor Wheel Co Ltd | Wheel for automobile |
| WO2006115205A1 (en) * | 2005-04-22 | 2006-11-02 | Central Motor Wheel Co., Ltd. | Method and device for molding uneven wall thickness tube |
| JP2008094398A (en) * | 2007-12-18 | 2008-04-24 | Topy Ind Ltd | Raw material for unequally thick rim and manufacturing method for unequally thick rim |
| CN103057349A (en) * | 2012-12-06 | 2013-04-24 | 李昕远 | Rim deformed steel section |
| JP2015030332A (en) * | 2013-08-01 | 2015-02-16 | プレス工業株式会社 | Axle case made of sheet metal |
| CN110385939A (en) * | 2019-08-13 | 2019-10-29 | 武汉理工大学 | A kind of change attribute wheel |
-
1994
- 1994-09-22 JP JP22766294A patent/JPH0891005A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1588867A4 (en) * | 2003-01-28 | 2007-09-19 | Topy Ind | Unequally thick rim, and method of manufacturing the rim |
| WO2004067294A1 (en) | 2003-01-28 | 2004-08-12 | Topy Kogyo Kabushiki Kaisha | Unequally thick rim, and method of manufacturing the rim |
| US7111910B2 (en) | 2003-01-28 | 2006-09-26 | Topy Kogyo Kabushiki Kaisha | Rim having a non-uniform thickness |
| KR100809942B1 (en) * | 2003-01-28 | 2008-03-06 | 토피 고교 가부시키가이샤 | Unequally thick rim, and method of manufacturing the rim |
| EP1588867A1 (en) * | 2003-01-28 | 2005-10-26 | Topy Kogyo Kabushiki Kaisha | Unequally thick rim, and method of manufacturing the rim |
| JP2006168597A (en) * | 2004-12-17 | 2006-06-29 | Chuo Motor Wheel Co Ltd | Wheel for automobile |
| JP4621018B2 (en) * | 2004-12-17 | 2011-01-26 | 中央精機株式会社 | Automotive wheel |
| WO2006115205A1 (en) * | 2005-04-22 | 2006-11-02 | Central Motor Wheel Co., Ltd. | Method and device for molding uneven wall thickness tube |
| JP2006297465A (en) * | 2005-04-22 | 2006-11-02 | Chuo Motor Wheel Co Ltd | Method and device for forming unequal-wall-thickness tube, and method for manufacturing automotive wheel rim formed from unequal-wall-thickness tube |
| JP4633781B2 (en) * | 2007-12-18 | 2011-02-16 | トピー工業株式会社 | Rim material for unequal thickness rim and method for manufacturing unequal thickness rim |
| JP2008094398A (en) * | 2007-12-18 | 2008-04-24 | Topy Ind Ltd | Raw material for unequally thick rim and manufacturing method for unequally thick rim |
| CN103057349A (en) * | 2012-12-06 | 2013-04-24 | 李昕远 | Rim deformed steel section |
| JP2015030332A (en) * | 2013-08-01 | 2015-02-16 | プレス工業株式会社 | Axle case made of sheet metal |
| CN110385939A (en) * | 2019-08-13 | 2019-10-29 | 武汉理工大学 | A kind of change attribute wheel |
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