JPS5816751A - Manufacture of rim for aluminum wheel - Google Patents
Manufacture of rim for aluminum wheelInfo
- Publication number
- JPS5816751A JPS5816751A JP11427081A JP11427081A JPS5816751A JP S5816751 A JPS5816751 A JP S5816751A JP 11427081 A JP11427081 A JP 11427081A JP 11427081 A JP11427081 A JP 11427081A JP S5816751 A JPS5816751 A JP S5816751A
- Authority
- JP
- Japan
- Prior art keywords
- rim
- thickness
- die
- punch
- manufacturing
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/28—Making machine elements wheels; discs
- B21K1/38—Making machine elements wheels; discs rims; tyres
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
Description
【発明の詳細な説明】
本発明はアルミニウム合金製のホイール用リムの製造法
に係り、特にディスク両側のリム肉厚が相違するリムの
製造法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a rim for a wheel made of aluminum alloy, and more particularly to a method for manufacturing a rim in which the rim thicknesses on both sides of a disk are different.
自動車用のアルミニウム合金製ホイール（以下アルミホ
イールと称する）にあっては、実際の運転に際し車両外
方へ面するリム部分の方が内側のリム部分より過酷な荷
重を受け、また縁石や障害物に接触して損傷し易いこと
から、ディスクを境として外側のリム部分の肉厚を内側
のリム部分の肉厚よシ全体的に厚くすることが７知られ
ている。In the case of aluminum alloy wheels for automobiles (hereinafter referred to as aluminum wheels), during actual driving, the rim portion facing outward of the vehicle is subjected to more severe loads than the inner rim portion, and is also subject to more severe loads than the inner rim portion. It is known that the thickness of the outer rim portion is generally thicker than that of the inner rim portion, with the disk as the boundary, because the disk is easily damaged by contact with the disk.
このようにリム肉厚を意図的に変化させたアルミホイー
ルは、従来主に一体鋳造法で作られていた。しかしなが
ら一体鋳造法によシ製造したアルミホイールは金属組織
の点から機械的強度が劣シ、これを補うために全体的に
厚肉となって軽量化が犠牲とならざるを得ない。Aluminum wheels in which the rim thickness has been intentionally varied in this way have traditionally been manufactured using the monolithic casting method. However, aluminum wheels manufactured using the monobloc casting method have poor mechanical strength due to their metallographic structure, and to compensate for this, the overall thickness has to be increased, at the expense of weight reduction.
従ってより機械的強度′に優れ、効果的に軽量化を達成
できると知られている鍛造や圧延加工等の鋳造以外の手
段でリムを製造し、然る後既知の方法で製造したディス
クと互いに固定してアルミホイールを完成する方法にお
いて、前述した如き肉厚の変化したリムを製造すること
が好ましい。Therefore, the rim is manufactured by a method other than casting, such as forging or rolling, which is known to have better mechanical strength and can effectively achieve weight reduction, and is then mutually bonded to a disc manufactured by a known method. In the method of fixing and completing an aluminum wheel, it is preferable to manufacture rims with varying wall thicknesses as described above.
ディスクおよびリムを別体に製造するアルミホイールに
おいて、従来一般にリムは円筒形のリム素材をもとにリ
ングロール加工またはロールフオーム加工にエリ成形さ
れている。またこのリム素材は、平板状に圧延加工もし
くは押出加工した基材を円筒形に曲げ加工した後両端縁
を溶接等で接合するか、或いは予め円筒形状に押出加工
して形成されている。リングロール加工またはロールフ
オーム加工の段階にて所望のリム肉厚の変化を４厚変化
を与えることが好ましい。しかしながら従来のり・ム素
材の製造法において、円筒形状に押出加工してリム幅方
向に肉厚変化を与えることはできず、切削加工等の付随
的加工手段が必要となる。In aluminum wheels in which a disc and a rim are manufactured separately, the rim has conventionally been formed into an edge by ring roll processing or roll form processing based on a cylindrical rim material. The rim material is formed by either rolling or extruding a base material into a flat plate shape, bending it into a cylindrical shape, and then joining both edges by welding or the like, or by extruding it into a cylindrical shape in advance. It is preferable to give the desired rim wall thickness a four-thickness change at the stage of ring roll processing or roll form processing. However, in the conventional manufacturing method of glue/mu material, it is not possible to extrude it into a cylindrical shape and change the thickness in the rim width direction, and additional processing means such as cutting are required.
平板状の基材を使用する方法によれば、予め・基材にリ
ム幅方向の肉厚変化を与えることで可能となるが、この
方法は曲げ加工が難かしく、さらに接合工程が必要とな
って好ましくない。According to the method of using a flat base material, it is possible to change the thickness of the base material in the rim width direction in advance, but this method is difficult to bend and requires an additional joining process. I don't like it.
本発明の目的は前述した現状に鑑み、極めて容易に肉厚
の変化したリムを製造する方法を提供することである。SUMMARY OF THE INVENTION In view of the above-mentioned current situation, an object of the present invention is to provide a method of manufacturing a rim with varying wall thickness very easily.
このために本発明は、リム素材を形成する段階において
パンチおよびダイスを使用し、パンチ鰺゛よびダイスの
協働によって被加工材から肉厚の変化せる円筒形のリム
素材をプレス鍛造して作ることを特徴とする。For this purpose, the present invention uses a punch and a die in the step of forming the rim material, and press-forges a cylindrical rim material of varying thickness from a workpiece by the cooperation of the punch and die. It is characterized by
この方法によればリム素材は１回のプレス加工で寸法精
度よく成形でき、しかも溶接線等が無く全周にわたり均
質なリム素材を得られる。また外側および内側のリム部
分の肉厚を変化させるために、例えばリム幅に直角方向
にリムを分割した所Ｍ３ピースホイール構成とする必要
性も解消される。According to this method, the rim material can be formed with high dimensional accuracy in one press process, and there is no weld line, etc., and the rim material is homogeneous over the entire circumference. Furthermore, the need for an M3-piece wheel configuration in which the rim is divided, for example, in a direction perpendicular to the rim width, in order to vary the wall thickness of the outer and inner rim portions, is eliminated.
以下に図面を参照し本発明の製造法につき説明する。The manufacturing method of the present invention will be explained below with reference to the drawings.
第１図は本発明で製造するリムの一実施例を示す。この
リムｌはディスク２が組付けられるウェルＩＡを含めて
自動車に装着された状態で外側となるリム幅範囲ａの肉
厚ｔａが内側になるリム幅範囲すの肉厚ｔｂ工り全体的
に厚くされている。勿論のことながら、各リム幅範囲ａ
、ｂにおいて肉厚がそれぞれｔａ、ｔｂで一定であると
いうことでなく、リム素材を加工してリムｌを成形する
段階にて周知のように部分的に肉厚が変化するが、ここ
では平均的なリム幅範囲ａの肉厚ｔａがリム幅範囲すの
肉厚ｔｂより大きいことを意味している。FIG. 1 shows an embodiment of a rim manufactured by the present invention. This rim l has a wall thickness ta of the rim width range a which is the outer side when mounted on the car, including the well IA where the disc 2 is assembled, and a wall thickness tb of the inner rim width range. It is thick. Of course, each rim width range a
, b, respectively, are not constant at ta and tb, and as is well known, the wall thickness changes locally at the stage of processing the rim material to form the rim l, but here, the average This means that the wall thickness ta of the rim width range a is larger than the wall thickness tb of the rim width range a.
このように外側のリム部分の肉厚を内側のリム部分の肉
厚より厚く攬たリムｌを形成するのに好適なリム素材１
０を第２図に示す。こ９リム素材１０は円筒形状で、完
成されるリムｌにおけるリム幅範囲ａに相当するリム素
材１０の範囲ａ′の肉厚ｔ’ ａが、リム幅範囲すに相
当する範囲ビの肉厚ｔ’ ｂよシ厚くされている。これ
らの肉厚ｔ’ａ、ビｂはリム１の完成のために行われる
り／クロール加■もしくはプレス拡径加工によって所定
の肉厚ｔａ。Rim material 1 suitable for forming a rim l in which the outer rim portion is thicker than the inner rim portion as described above.
0 is shown in FIG. The 9 rim material 10 has a cylindrical shape, and the wall thickness t' of the range a' of the rim material 10 corresponding to the rim width range a in the completed rim L is the same as the wall thickness of the range B corresponding to the rim width range A. It is thicker than t'b. These wall thicknesses t'a and bib are made to a predetermined wall thickness ta by rolling/crawling or press diameter expansion processing performed to complete the rim 1.
ｔｂを得るように予め選定される。。また肉厚ｔ’ａ。tb. . Also thick t’a.
ｔ’ ｂはそれぞれの範囲で完全に一様厚さとされる必
要はなく、後述する本発明の特徴とするプレス加工を容
易とするために若干のテーパー状肉厚となすこともでき
る。t' b does not need to be completely uniform in thickness in each range, and may be slightly tapered in thickness in order to facilitate press working, which is a feature of the present invention, which will be described later.
本発明の特徴に工もこのような肉厚ｔ’ａ、ｔ’ｂを有
するリム素材１０はプレス加工にエリビレットから作ら
れる。これに使用するプレス機の一実施例を第３図に示
す。このプレス機は上下方向に駆動可能のパンチ２０、
ボルスタ−２１上に固定された円筒形の内側ダイス２２
および外側ダイス２３を含む。パンチ２０の先端部２０
Ａの周面は内側ダイス２２の内径面２２′Ａと緊密に摺
接する工うに寸法法めされている。またパンチ２０は中
央拡径部２０Ｂを有し、その周面は外側ダイス２３の内
径面２３Ａと間隙Ｓｌ（ここではＳｔ ＝＝ ｔ’ａ）
の円筒空間を形成するように選、定されている。一方円
側ダイス２２の外周面２２Ｂと外側ダイス２３の内径面
２３Ａとは間隙Ｓ２（ここでは５２−ｔ′ｂ）の円筒空
間を形成し、外側ダイス２３の方が内側ダイス２２よシ
高く設定されている。間隙Ｓ２の円゛筒空間の高さｈは
、ここではり゛ム素材１０における範囲ｂ′の長さ寸法
に応じて選定されている。A feature of the present invention is that the rim material 10 having such wall thicknesses t'a and t'b is made from billet by press working. An example of a press machine used for this is shown in FIG. This press machine includes a punch 20 that can be driven in the vertical direction;
Cylindrical inner die 22 fixed on the bolster 21
and an outer die 23. Tip 20 of punch 20
The circumferential surface of A is dimensioned to make close sliding contact with the inner diameter surface 22'A of the inner die 22. Further, the punch 20 has a central enlarged diameter portion 20B, the peripheral surface of which is connected to the inner diameter surface 23A of the outer die 23 and the gap Sl (here, St == t'a).
are selected and configured to form a cylindrical space. On the other hand, the outer peripheral surface 22B of the circular die 22 and the inner diameter surface 23A of the outer die 23 form a cylindrical space with a gap S2 (here, 52-t'b), and the outer die 23 is set higher than the inner die 22. has been done. The height h of the cylindrical space of the gap S2 is selected here according to the length dimension of the range b' in the beam material 10.
被加工材３０は第３図に示す如く内側ダイス２２の内径
より若干大きな内径寸法、お工び外側ダイス２３の内径
より若干小さな外径寸法を有するリング形状に形成され
、内側ダイス２２上に置かれてセットされる。As shown in FIG. 3, the workpiece 30 is formed into a ring shape having an inner diameter slightly larger than the inner diameter of the inner die 22 and an outer diameter slightly smaller than the inner diameter of the machined outer die 23, and is placed on the inner die 22. and set.
このようなプレス機に工す、パンチ２０を下方ヘゲレス
駆動することによってリム素材１０′が第４図に示す如
く被加工材３０からプレス成形される。すなわち、被加
工材３０はパンチ１０お工びダイス２２．２３によって
塑性変形され、一部は内側ダイス２２お工び外側ダイス
２３の間隙空間内に押込まれる一方、残る、部分はポン
チ２０と外側ダイス２３とで規制される円筒空間から上
方へ押出される。このようにして第２図に示す如き肉厚
の変化したリム素材１σが形成される１、然る後パンチ
２０と内側ダイス２２との間に形成されたフランジ部分
１０′Ａを適当に切除し、且つ上方へ押出された長さ部
分を所定長さに切断することで第２図のリム素材１０が
形成される。A rim material 10' is press-formed from a workpiece 30 as shown in FIG. 4 by driving the punch 20 in such a press machine in a downward motion. That is, the workpiece 30 is plastically deformed by the punch 10 and the dies 22 and 23, and a portion is pushed into the gap space between the inner die 22 and the outer die 23, while the remaining portion is deformed by the punch 20 and the outer die 23. It is extruded upward from the cylindrical space regulated by the outer die 23. In this way, a rim material 1σ with a changed wall thickness as shown in FIG. The rim material 10 shown in FIG. 2 is formed by cutting the length portion extruded upward into a predetermined length.
ここで、プレス加工後のリム素材１０′の抜取シを容易
となすだめに、内側ダイス２２と外Ｉ１１ダイス２３と
の間隙Ｓ２を下方へ向けて狭くなるようなテーパー形と
することができる′。これによりリム素材１０ 、１０
’の薄肉部分の肉厚はテーパー状に変化するが、この程
度の肉厚変化は実質的に支障とならない。また図示して
いない、が適当なノックアウト部材を備えることもでき
る。Here, in order to facilitate the removal of the rim material 10' after press working, the gap S2 between the inner die 22 and the outer I11 die 23 can be tapered so as to become narrower downward.' . This makes the rim material 10, 10
Although the thickness of the thin portion of ' changes in a tapered manner, this degree of thickness change does not substantially cause a problem. A suitable knockout member (not shown) may also be provided.
さらにまた、第５図に示す如く外側ダイス２３′の内側
に密着するように被加工材のだめのサポート２４を配置
し、パンチ２０′と外側ダイス２．３′との間のみで肉
厚の変化するリム素材１０’をプレス構造するようにプ
レス機を構成することもできる。Furthermore, as shown in FIG. 5, a support 24 for holding the workpiece is arranged so as to be in close contact with the inside of the outer die 23', so that the wall thickness changes only between the punch 20' and the outer die 2.3'. The press machine can also be configured to press the rim material 10'.
この場合、パンチ２０′にリム素材における肉厚変ご
化に相当する□段＄２０’ｃを形成しておけば工い。In this case, the punch 20' should be
If you form the □ stage $20'c corresponding to , it will be easy.
また外側ダイス２３′を割型構造としておけばプレス加
工後のリム素材１０′の抜取りが容易に々る。Further, if the outer die 23' has a split structure, the rim material 10' can be easily removed after pressing.
このように形成したリム素材１０は次に周知のリングロ
ール加工等の方法に工り加工されて第１図に示す如きリ
ム１に成形され、リム力；完成される。リングローに加
工等のリム成形方法は従来工り知られているので詳述し
ない。The rim material 10 thus formed is then processed by a well-known method such as ring roll processing to form a rim 1 as shown in FIG. 1, and the rim material 10 is completed. Rim forming methods such as ring row processing are conventionally known and will not be described in detail.
上述の本発明の製造法によれば、１ツム素材カニ被加工
材からパンチお工びダイスによって鍛造成形され、円周
方′向に接合線の無い完全に均質な円筒形に形成される
。しかも外側となるリム部分の肉厚が内側となるリム部
分の肉厚よりも厚い１ツムを製造するために、リム素材
に所要の肉厚変イヒを与えることが同時にできる等の多
大の効果を得られる。According to the above-mentioned manufacturing method of the present invention, a single piece of raw workpiece is forged using punches and dies, and is formed into a completely homogeneous cylindrical shape with no joining line in the circumferential direction. Moreover, in order to manufacture a tsum whose outer rim part is thicker than the inner rim part, it has great effects such as being able to give the rim material the desired thickness variation at the same time. can get.
尚、前述の説明は本発明の製造法における特徴となるリ
ム素材の製造工程につき基本的実施例を参照して説明し
たが、パンチお工びダイスの形状の選択によってプレス
成形後のリム素材の形状が多様に変化し、これに応じて
プレス成形後のリム素材に対して後工程の′だめの準備
加工が変更もしくは省略されることは勿論である。Although the above explanation has been made with reference to basic examples regarding the manufacturing process of the rim material, which is a feature of the manufacturing method of the present invention, the rim material after press forming can be changed by selecting the shape of the punch and die. It goes without saying that the shape changes in a variety of ways, and that the post-process preparatory processing for the press-formed rim material is changed or omitted accordingly.
第１図は本発明の製造法により製造するアルミホイール
用リムを示す断面図。
第２図はリム素材の断面図。
第３図は本発明で使用するプレス機の一例を示す縦断面
図。
第４図はプレス鍛造直後の状態を示す縦断面図。
第５図は他のプレス機を示す縦断面図。
１・・・・・・・・・・・・・・・リム２・・・・・・
・デ・・・・・・・ディスク１０・・・・・・・・・・
・・リム素材２０ 、２０’・・・パンチ
２１・・・・・・−・・・・・ボルスタ−２２・・・・
・・・・・・・・内側ダイス２３ 、２３’・・・外側
ダイス
２４・・・・・・・・・・・・サポート３０・・・・・
・・・・・・・被加工材ａ′・・・・・・・・・・・・
・・・厚肉部分ｄ・・・・・・・・・・・・・・・薄肉
部分第５図FIG. 1 is a sectional view showing an aluminum wheel rim manufactured by the manufacturing method of the present invention. Figure 2 is a cross-sectional view of the rim material. FIG. 3 is a longitudinal sectional view showing an example of a press machine used in the present invention. FIG. 4 is a longitudinal sectional view showing the state immediately after press forging. FIG. 5 is a longitudinal sectional view showing another press machine. 1・・・・・・・・・・・・・・・Rim 2・・・・・・
・De・・・・・・Disc 10・・・・・・・・・・
...Rim material 20, 20'...Punch 21...Bolster 22...
......Inner dice 23, 23'...Outer die 24...Support 30...
・・・・・・Work material a′・・・・・・・・・・・・
...Thick part d... Thin part Fig. 5
Claims (1)
リム部分の肉厚が全体的に相異するアルミニウム合金製
ホイール用リムを製造する方法であって、被加工材をパ
ンチおよびダイスの協働に１シブレス加工することで予
め前記各側のリム部分に相当するリム素材の部分の肉厚
に変化を与えてリム素材を成形し、該リム素材を使用し
てリム完成品に仕上げることを特徴とするアルミホイー
ル用リムの製造法。This is a method for manufacturing an aluminum alloy wheel rim based on a cylindrical rim material, in which the wall thickness of the rim portion on one side and the other side in the width direction of the rim is different throughout. The rim material is formed by changing the wall thickness of the portion of the rim material corresponding to the rim portion on each side in advance by performing 1-shibres processing in cooperation with the punch and die, and the rim material is completed using the rim material. A manufacturing method for aluminum wheel rims that is characterized by a high-quality finish.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11427081A JPS5816751A (en) | 1981-07-21 | 1981-07-21 | Manufacture of rim for aluminum wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11427081A JPS5816751A (en) | 1981-07-21 | 1981-07-21 | Manufacture of rim for aluminum wheel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5816751A true JPS5816751A (en) | 1983-01-31 |
Family
ID=14633602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11427081A Pending JPS5816751A (en) | 1981-07-21 | 1981-07-21 | Manufacture of rim for aluminum wheel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5816751A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100395052C (en) * | 2006-07-14 | 2008-06-18 | 哈尔滨工业大学 | Model and method for liquid state formation of aluminium hub disc for special vehicle |
| JP2010149182A (en) * | 2008-11-18 | 2010-07-08 | Topy Ind Ltd | Method of manufacturing tubular member |
| US8627700B2 (en) | 2010-02-17 | 2014-01-14 | Topy Kogyo Kabushiki Kaisha | Method of manufacturing a wheel rim for a vehicle |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52134861A (en) * | 1976-05-07 | 1977-11-11 | Aida Eng Ltd | Method of fabricating car wheels |
| JPS55144346A (en) * | 1979-04-26 | 1980-11-11 | Furukawa Alum Co Ltd | Production of rim made of aluminum alloy for disc wheel |
-
1981
- 1981-07-21 JP JP11427081A patent/JPS5816751A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52134861A (en) * | 1976-05-07 | 1977-11-11 | Aida Eng Ltd | Method of fabricating car wheels |
| JPS55144346A (en) * | 1979-04-26 | 1980-11-11 | Furukawa Alum Co Ltd | Production of rim made of aluminum alloy for disc wheel |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100395052C (en) * | 2006-07-14 | 2008-06-18 | 哈尔滨工业大学 | Model and method for liquid state formation of aluminium hub disc for special vehicle |
| JP2010149182A (en) * | 2008-11-18 | 2010-07-08 | Topy Ind Ltd | Method of manufacturing tubular member |
| US9085027B2 (en) | 2008-11-18 | 2015-07-21 | Topy Kogyo Kabushiki Kaisha | Method of manufacturing a tubular member |
| US8627700B2 (en) | 2010-02-17 | 2014-01-14 | Topy Kogyo Kabushiki Kaisha | Method of manufacturing a wheel rim for a vehicle |
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