JPH09315102A - Manufacture of aluminium alloy wheel hub - Google Patents
Manufacture of aluminium alloy wheel hubInfo
- Publication number
- JPH09315102A JPH09315102A JP8133220A JP13322096A JPH09315102A JP H09315102 A JPH09315102 A JP H09315102A JP 8133220 A JP8133220 A JP 8133220A JP 13322096 A JP13322096 A JP 13322096A JP H09315102 A JPH09315102 A JP H09315102A
- Authority
- JP
- Japan
- Prior art keywords
- roller
- wheel
- lathe
- mounting surface
- fitting surface
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
Landscapes
- Turning (AREA)
Abstract
Description
【０００１】[0001]
【発明が属する技術分野】本発明はアルミニウム合金製
の例えば自動車用のホイールハブのような鋳造品の製造
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 for manufacturing a cast product made of an aluminum alloy, such as a wheel hub for an automobile.
【０００２】[0002]
【従来の技術】従来，自動車のホイールハブは，一般に
ダクタイル鋳鉄で製造されており，アルミニウム合金製
の場合は鍛造品で製造されていて，金型鋳造によるアル
ミニウム合金製の鋳造品は製造されていない。2. Description of the Related Art Conventionally, wheel hubs of automobiles are generally made of ductile cast iron, and in the case of aluminum alloy, they are manufactured by forging, and aluminum alloy castings by die casting are manufactured. Absent.
【０００３】[0003]
【発明が解決しようとする課題】ホイールハブは自動車
において重要強度部品であり，材料として安定した強度
を必要とするとともに，ホイール等を取付ける取付面に
繰返し回数の多い大きい接触圧が加わるとき，表面に
“へたり”を生じて，ボルトがゆるむことがないように
しなければならない。The wheel hub is an important strength component in automobiles, requires stable strength as a material, and has a surface that is subjected to a large number of repeated contact pressures on the mounting surface on which the wheel or the like is mounted. The bolt shall not loosen due to "sag" at the end.
【０００４】しかるに，従来のアルミニウム合金の鋳造
品は一般に鍛造品に比較して組織が緻密でないために，
繰返しの接触圧が加わると“へたり”を生ずるので，従
来はダクタイル鋳鉄やアルミニウム合金の鍛造品が使用
されていて，鋳造品を使用する場合は素材の組織を緻密
にする必要があった。[0004] However, a conventional aluminum alloy casting generally has a less dense structure than a forged product.
If a repeated contact pressure is applied, "sagging" occurs. Forging products of ductile cast iron or aluminum alloy have conventionally been used, and when using cast products, it was necessary to make the structure of the material dense.
【０００５】[0005]
【課題を解決するための手段】アルミニウム合金の鋳造
品のホイールハブのホイール等の取付面を機械で切削加
工後，比較的に小さいローラによって転動加圧加工する
ことによって取付面表面を加工硬化させて，取付面に繰
返しの大きい接触圧が加わっても“へたり”が発生させ
ないようにして解決する。ローラは，例えば，半径が１
０〜４０ｍｍ，幅が７〜２０ｍｍのものを用いると良
い。また，トラックのホイール等も同じ方法で“へた
り”防止ができる。[Means for Solving the Problems] The surface of the mounting surface of a wheel hub of a cast aluminum alloy product is machined, and then the surface of the mounting surface is work hardened by rolling and pressing with a relatively small roller. By doing so, even if a large contact pressure is repeatedly applied to the mounting surface, "sag" does not occur and the solution is solved. The roller has, for example, a radius of 1
It is preferable to use one having a width of 0 to 40 mm and a width of 7 to 20 mm. Also, the wheel of a truck, etc. can be prevented by the same method.
【０００６】[0006]
【作用】本発明の加工方法によるとき，旋盤で旋削加工
された少なくともホイール等の取付面を転動するローラ
で加圧加工することによって，ホイール等の取付面およ
びそれをバックアップする部分を加工硬化し，組織を緻
密にすることによって取付面の“へたり”をなくし，ボ
ルトのゆるみを防止することができる。一般に，アルミ
ニウム合金はダクタイル鋳鉄よりも降伏点が低く，“へ
たり”やすく，アルミニウム合金においても，一般に鋳
造品は鍛造品に比較して組織の中に隙間が多く，これが
繰返しの接触圧を受けたとき，圧縮縮少して，“へた
り”の大きい要因となる。According to the processing method of the present invention, at least the mounting surface of the wheel or the like, which is turned by the lathe, is pressure-processed by the rolling roller to work-harden the mounting surface of the wheel or the like and the portion for backing it up. However, by making the structure dense, it is possible to eliminate the "sag" of the mounting surface and prevent the bolt from loosening. In general, aluminum alloys have a lower yield point than ductile cast iron and are more likely to “sag”. Even with aluminum alloys, castings generally have more gaps in the structure than forged products, which are subject to repeated contact pressure. When compression occurs, compression is reduced, which causes a large "set".
【０００７】したがって，ホイール等の取付面およびこ
れをバックアップする領域の組織を緻密にする必要があ
る。この加圧加工におけるローラ径の影響について，図
２，図４および次式によって説明する。図２，図４は取
付面にローラが押付けられた状態を示す。ローラの半径
をｒとし，最大接触圧力をｐmax とすると，Therefore, it is necessary to make the structure of the mounting surface of the wheel or the like and the structure of the area for backing it up dense. The influence of the roller diameter in this pressure processing will be described with reference to FIGS. 2 and 4 show a state where the roller is pressed against the mounting surface. If the radius of the roller is r and the maximum contact pressure is p max ,
【０００８】[0008]
【数１】ａ＝２Ｋｒｐmax Ｐ＝πＫｒｐmax 2 Ｆ＝Ｐ・Ｂ＝πＫｒｐmax 2・Ｂ## EQU1 ## a = 2Krp max P = πKrp max 2 F = P · B = πKrp max 2 · B
【０００９】ここで，Ｋはホイールハブとローラの材質
によって決まる値，ａは接触面の長さの１／２，Ｂはロ
ーラの幅，Ｐはローラに加えるべき単位長さ当りの加圧
力，Ｆは全体の加圧力である。そして，加圧力の効果の
及ぶ深さは接触面の長さ２ａに比例する。Here, K is a value determined by the material of the wheel hub and the roller, a is 1/2 of the length of the contact surface, B is the width of the roller, P is the pressing force per unit length to be applied to the roller, F is the total applied pressure. The depth of the effect of the pressing force is proportional to the length 2a of the contact surface.
【００１０】このことから，小さいローラ径のローラを
用いると加圧硬化を得るために必要な接触圧力ｐmax を
得るための加圧力Ｆは小さくてすむが，接触面の長さは
小さく，これに比例する加圧力の効果深さも小さく，
“へたり”防止には効果は少なく，一方，大きいローラ
径のローラを用いると，大きい加圧力Ｆを必要とし，一
般の旋盤では力不足となるので，実験結果からして，ロ
ーラの半径は１０〜４０ｍｍ，ローラの幅は７〜２０ｍ
ｍが適当である。For this reason, when a roller having a small roller diameter is used, the pressing force F for obtaining the contact pressure p max necessary for obtaining pressure hardening can be small, but the length of the contact surface is small. The effect depth of the pressing force proportional to
The effect of preventing "fatigue" is small. On the other hand, if a roller with a large roller diameter is used, a large pressing force F is required, and the force will be insufficient on a general lathe. 10-40mm, roller width 7-20m
m is suitable.
【００１１】また，加圧力の効果深さを大きくするため
に最大接触圧力ｐmax を過大にすると表面は破壊され，
“むしれ”を生ずる。表面硬化のために取付面をプレス
で加圧することもできるが，このときは大きい力のプレ
スを必要とするとともに別の加工工程を必要とし，コス
トアップの原因となる。本発明では，旋盤での旋削加工
に引続いてローラ加工をすることで同一工程で加工する
ことができ，適当なローラ径を選択することにより，初
期の効果を上げることができる。On the other hand, if the maximum contact pressure p max is excessively increased in order to increase the depth of the effect of the pressing force, the surface is destroyed,
It causes "pluck". It is possible to press the mounting surface with a press to harden the surface, but this requires a press with a large force and a separate processing step, which increases costs. In the present invention, it is possible to perform the same process by performing the roller processing subsequent to the turning processing on the lathe, and the initial effect can be improved by selecting an appropriate roller diameter.
【００１２】[0012]
【発明の実施の形態】図１，図２，図４は本発明を実施
するための装置の１実施例を示す図面である。２は被加
工物であるホイールハブで，旋盤のチャック１に取付け
られ旋回する。３はそのホイールハブ２のホイール取付
面である。４はホイール取付面３を加圧転動加工するロ
ーラで，ニードルベヤリング５を介して軸６に支持され
ており，その軸６は先端が二股になっている支持棒７に
取付けられている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1, 2 and 4 show an embodiment of an apparatus for carrying out the present invention. Reference numeral 2 denotes a wheel hub which is a workpiece, which is mounted on a chuck 1 of a lathe and turns. Reference numeral 3 denotes a wheel mounting surface of the wheel hub 2. Reference numeral 4 denotes a roller for rolling the wheel mounting surface 3 under pressure, which is supported by a shaft 6 via a needle bearing ring 5, and the shaft 6 is mounted on a support rod 7 having a forked end.
【００１３】ローラ４を適当な力でホイール取付面であ
る加工面３に押付けるために，支持棒７は支持棒ホルダ
８の間にスプリング９を設置し，方向を維持するための
キー１０を介してナット１１で支持棒ホルダ８に取付け
られている。さらに，支持棒ホルダ８は旋盤の切削用バ
イトと同様に刃物取付金具１２を介して図示されていな
い旋盤の刃物台に取付けられる。ホイール取付面３の旋
盤による旋削が完了すると刃物台を旋回して切削刃物の
代りに加圧ローラ４をセットする。In order to press the roller 4 against the working surface 3 which is the wheel mounting surface with an appropriate force, the support rod 7 has a spring 9 installed between the support rod holders 8 and a key 10 for maintaining the direction. It is attached to the support rod holder 8 with the nut 11 via the. Further, the support rod holder 8 is mounted on a tool rest of a lathe (not shown) via a tool mounting bracket 12 similarly to the cutting tool of the lathe. When the turning of the wheel mounting surface 3 by the lathe is completed, the tool rest is turned and the pressure roller 4 is set instead of the cutting tool.
【００１４】一般に，旋削にはＮＣ旋盤が用いられるの
で，加圧ローラ４の押付寸法も数値制御を行うが，その
設定位置はローラ４がホイール取付面３に接触する位置
よりわずかに押込み，スプリング９を作用する位置とす
ることにより，安定した荷重で加圧転動加工できる。こ
のために，スプリング９は無負荷時に目標に近い荷重に
なるように取付けておく。Generally, since an NC lathe is used for turning, the pressing dimension of the pressure roller 4 is also numerically controlled, but its setting position is slightly pushed in from the position where the roller 4 contacts the wheel mounting surface 3 and the spring is pressed. By setting 9 as the position to act, pressure rolling can be performed with a stable load. For this purpose, the spring 9 is mounted so that the load is close to the target when no load is applied.
【００１５】この状態を図２，図３で説明する。ローラ
幅をＢとすると，ローラ加圧力（スプリング力）Ｆ＝Ｐ
・Ｂ。スプリング９を締込んでいない図２（ａ）に示す
状態および図３の（ａ）点の状態から，目標とするスプ
リング力Ｆを得るためにナット１１をＳだけ締込んだ図
２（ｂ）に示す状態のＧ点を図３（ｂ）に示す。この状
態で旋盤に取付ける。ローラ加工を行うときは，図２
（ｃ）および図３の（ｃ），図４（ａ），（ｂ）に示す
ように，更にΔＳだけ変型させて加工するようにＮＣプ
ログラムを設定すると，被加工物２の寸法が少し異なっ
てもΔＳの範囲内であれば安定したスプリング力を得る
ことができ，加圧転動加工を行う。This state will be described with reference to FIGS. When the roller width is B, the roller pressure (spring force) F = P
・ B. 2 (b) in which the nut 11 is tightened by S in order to obtain the target spring force F from the state shown in FIG. 2 (a) where the spring 9 is not tightened and the state at point (a) in FIG. Point G in the state shown in FIG. 3 is shown in FIG. Attach it to the lathe in this state. When performing roller processing,
As shown in (c), FIG. 3 (c), FIG. 4 (a), and (b), when the NC program is set so that the workpiece is deformed by ΔS, the dimension of the workpiece 2 is slightly different. Even if it is within the range of ΔS, a stable spring force can be obtained, and pressure rolling processing is performed.
【００１６】[0016]
【発明の効果】本発明の方法を用いることにより，アル
ミニウム合金の鋳造品製のホイールハブ類でも“へた
り”をなくすことが可能となり，従来のダクタイル鋳鉄
品に比較して約１／２の重量のホイールハブ類を製造で
き，自動車の軽量化に貢献するとともに，アルミ鍛造の
ホイールハブ類に比較して大幅なコストダウンができ
る。By using the method of the present invention, it is possible to eliminate "fatigue" even in wheel hubs made of cast aluminum alloy, which is about 1/2 of that of conventional ductile cast iron products. It is possible to manufacture heavy wheel hubs, which contributes to the weight reduction of automobiles and also enables a significant cost reduction compared to aluminum forged wheel hubs.
【図１】本発明の方法を実施するホイールハブの加圧転
動ローラ加工の１実施例を示す縦断面図である。FIG. 1 is a longitudinal sectional view showing one embodiment of a pressure rolling roller working of a wheel hub for implementing a method of the present invention.
【図２】ローラ取付治具の１実施例の詳細図であり，負
荷変動におけるローラ位置変位を示す図である。FIG. 2 is a detailed view of an embodiment of the roller mounting jig, and is a view showing roller position displacement due to load fluctuation.
【図３】負荷変動によるスプリング変型量との関係を示
す線図である。FIG. 3 is a diagram showing a relationship with a spring deformation amount due to load fluctuation.
【図４】ローラをホイール取付面に押付けた状態を示す
図である。FIG. 4 is a diagram illustrating a state where a roller is pressed against a wheel mounting surface.
１ 旋盤チャック ２ ホイールハブ（被加工物） ３ ホイール取付面（加工面） ４ ローラ ５ ニードルベヤリング ６ 軸 ７ 支持棒 ８ 支持棒ホルダ ９ スプリング １０ キー １１ ナット １２ 刃物取付金具 1 Lathe Chuck 2 Wheel Hub (Workpiece) 3 Wheel Mounting Surface (Processing Surface) 4 Roller 5 Needle Bearer Ring 6 Axis 7 Support Rod 8 Support Rod Holder 9 Spring 10 Key 11 Nut 12 Tool Fitting
Claims (2)
ム合金鋳造品で製造する場合に，円板状のホイール取付
面を旋盤等で機械加工した後，その製品を旋盤等に取付
けて回転させた状態で小さいローラをホイール取付面に
一定の加圧力で押付けて表面を硬化させ，ホイール取付
面のへたりを防止して強いアルミニウム合金製ホイール
ハブ類を製造するようにしたアルミニウム合金製ホイー
ルハブ類の製造方法。1. When manufacturing a wheel hub of a truck from an aluminum alloy cast product, after the disk-shaped wheel mounting surface is machined by a lathe or the like, the product is mounted on the lathe or the like and rotated. Manufacture of aluminum alloy wheel hubs such that a small roller is pressed against the wheel mounting surface with a constant pressure to harden the surface and prevent the wheel mounting surface from sagging to manufacture strong aluminum alloy wheel hubs. Method.
の幅を７〜２０ｍｍとした請求項１記載のアルミニウム
合金製ホイールハブ類の製造方法。2. The method of manufacturing an aluminum alloy wheel hub according to claim 1, wherein the radius of the roller is 10 to 40 mm and the width of the roller is 7 to 20 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8133220A JPH09315102A (en) | 1996-05-28 | 1996-05-28 | Manufacture of aluminium alloy wheel hub |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8133220A JPH09315102A (en) | 1996-05-28 | 1996-05-28 | Manufacture of aluminium alloy wheel hub |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09315102A true JPH09315102A (en) | 1997-12-09 |
Family
ID=15099547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8133220A Pending JPH09315102A (en) | 1996-05-28 | 1996-05-28 | Manufacture of aluminium alloy wheel hub |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09315102A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006327388A (en) * | 2005-05-26 | 2006-12-07 | Ntn Corp | Bearing device for wheel and manufacturing method therefor |
| CN103331575A (en) * | 2013-06-07 | 2013-10-02 | 南通福乐达汽车配件有限公司 | Forming technique of hub with bidirectional cylindrical boss |
| CN104015005A (en) * | 2014-06-13 | 2014-09-03 | 浙江巨科实业有限公司 | Manufacturing method of commercial high-magnesium aluminum alloy wheel hubs |
| CN104889676A (en) * | 2015-04-16 | 2015-09-09 | 新疆大学 | Foam aluminum alloy-made wheel hub preparation method |
| WO2015131522A1 (en) * | 2014-03-05 | 2015-09-11 | 浙江巨科实业股份有限公司 | Aluminum alloy hub manufacturing method |
| CN104908519A (en) * | 2015-07-02 | 2015-09-16 | 常州德日机械有限公司 | Hub part for electric vehicle wheel with detachable installing auxiliary tool |
| CN105479105A (en) * | 2015-12-15 | 2016-04-13 | 天津立中车轮有限公司 | Manufacturing process for aluminum alloy wheels |
-
1996
- 1996-05-28 JP JP8133220A patent/JPH09315102A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006327388A (en) * | 2005-05-26 | 2006-12-07 | Ntn Corp | Bearing device for wheel and manufacturing method therefor |
| CN103331575A (en) * | 2013-06-07 | 2013-10-02 | 南通福乐达汽车配件有限公司 | Forming technique of hub with bidirectional cylindrical boss |
| CN103331575B (en) * | 2013-06-07 | 2015-11-25 | 南通福乐达汽车配件有限公司 | A kind of moulding process of two-way tubular boss wheel hub |
| WO2015131522A1 (en) * | 2014-03-05 | 2015-09-11 | 浙江巨科实业股份有限公司 | Aluminum alloy hub manufacturing method |
| CN104015005A (en) * | 2014-06-13 | 2014-09-03 | 浙江巨科实业有限公司 | Manufacturing method of commercial high-magnesium aluminum alloy wheel hubs |
| CN104889676A (en) * | 2015-04-16 | 2015-09-09 | 新疆大学 | Foam aluminum alloy-made wheel hub preparation method |
| CN104908519A (en) * | 2015-07-02 | 2015-09-16 | 常州德日机械有限公司 | Hub part for electric vehicle wheel with detachable installing auxiliary tool |
| CN105479105A (en) * | 2015-12-15 | 2016-04-13 | 天津立中车轮有限公司 | Manufacturing process for aluminum alloy wheels |
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