JP2001018032A - Manufacture of flanged shaft, and manufacturing device used therefor - Google Patents
Manufacture of flanged shaft, and manufacturing device used thereforInfo
- Publication number
- JP2001018032A JP2001018032A JP11190641A JP19064199A JP2001018032A JP 2001018032 A JP2001018032 A JP 2001018032A JP 11190641 A JP11190641 A JP 11190641A JP 19064199 A JP19064199 A JP 19064199A JP 2001018032 A JP2001018032 A JP 2001018032A
- Authority
- JP
- Japan
- Prior art keywords
- shaft
- flange
- burrs
- die
- forming
- 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.)
- Withdrawn
Links
Landscapes
- Forging (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、丸棒からなるシャ
フトの端部にその径方向に張出すフランジを有する異形
のフランジ付きシャフトの製造方法とこれに用いる製造
装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a flanged shaft having an irregular shape having a flange extending radially from the end of a shaft formed of a round bar, and a manufacturing apparatus used for the shaft.
【０００２】[0002]
【従来の技術】例えば自動車用のリヤアクスルシャフト
は、図５に示す方法により製造されている。即ち、図５
(Ａ),(Ｂ)に示すように、構造用炭素鋼等からなる丸棒４
０を所要の温度域に加熱してその周面(シャフト)４１を
拘束し、一端４２側を図示しない円錐形状の型を用い、
その軸方法に沿って据え込み鍛造を施す。これにより、
径方向に円錐形に張出した太径部４３が得られる。引き
続いて、別の型を用いて据え込み鍛造を施すと、図５
(Ｃ)に示すように、上記太径部４３よりも更に張出した
太径部４４をシャフト４１の一端４２側に有する中間素
材４５が得られる。2. Description of the Related Art For example, a rear axle shaft for an automobile is manufactured by a method shown in FIG. That is, FIG.
As shown in (A) and (B), a round bar 4 made of structural carbon steel or the like is used.
0 is heated to a required temperature range to constrain its peripheral surface (shaft) 41, and a conical mold (not shown) is used at one end 42 side,
Upsetting forging is performed along the axis method. This allows
A large diameter portion 43 that protrudes in a conical shape in the radial direction is obtained. Subsequently, when upsetting forging is performed using another mold, FIG.
As shown in (C), an intermediate material 45 having a large-diameter portion 44 protruding further than the large-diameter portion 43 on one end 42 side of the shaft 41 is obtained.
【０００３】次いで、上記中間素材４５をそのシャフト
４１を拘束し且つ太径部４４を図示しないダイスのキャ
ビティ内に挿入すると共に、このキャビティ内にポンチ
を押込む。これにより、図５(Ｄ)に示すように、上記太
径部４４から径方向に対称で十字形の放射状に延びる４
つのフランジ片４７が成形される。同時に、各フランジ
片４７の中心に丸い凹み５０とシャフト４１側にテーパ
部４９も成形されて成形シャフト４６となる。この際、
成形シャフト４６における各フランジ片４７，４７間と
その周囲には薄肉のバリ４８が同時に形成される。Then, the intermediate material 45 is restrained on the shaft 41, the large diameter portion 44 is inserted into a cavity of a die (not shown), and a punch is pressed into the cavity. As a result, as shown in FIG.
Two flange pieces 47 are formed. At the same time, a round recess 50 is formed at the center of each flange piece 47 and a tapered portion 49 is also formed on the shaft 41 side to form a formed shaft 46. On this occasion,
Thin burrs 48 are simultaneously formed between and around the flange pieces 47 of the molded shaft 46.
【０００４】上記バリ４８を除去するため、図５(Ｅ)中
に破線で示す略十字形の抜き型５１に上記成形体４６を
セットし、係る抜き型５１と相似形の図示しないポンチ
をこの抜き型５１内に押込む。これにより、フランジ片
４７，４７間からバリ４８を剪断により抜き出せる。し
かし、図５(Ｅ)に示すように、成形シャフト４６を上記
抜き型５１にセットする際、シャフト４１を中心にして
その周りに数度ばかり回転した状態で拘束してバリ４８
を抜く場合がある。この結果、図５(Ｆ)に示すように、
リヤアクスルシャフト(フランジ付きシャフト)５４にお
ける各フランジ片４７の一側面には噛付き面５２が、他
側面にバリ片４８ａがそれぞれ形成される。噛付き面５
２やバリ片４８ａを有するリヤアクスルシャフト５４で
は実用に堪えないと共に、その歩留まり及び生産性を低
下させる、という問題があった。In order to remove the burr 48, the molded body 46 is set in a substantially cross-shaped punching die 51 shown by a broken line in FIG. Push it into the punching die 51. Thus, the burr 48 can be pulled out from between the flange pieces 47 by shearing. However, as shown in FIG. 5E, when the molding shaft 46 is set in the punching die 51, it is restrained while rotating around the shaft 41 by a few degrees around the shaft 41 and the burr 48 is set.
May be omitted. As a result, as shown in FIG.
In the rear axle shaft (shaft with flange) 54, a biting surface 52 is formed on one side surface of each flange piece 47, and a burr piece 48a is formed on the other side surface. Biting surface 5
The rear axle shaft 54 having the fins 2 and the burr pieces 48a has a problem that it cannot be put to practical use and reduces the yield and productivity.
【０００５】[0005]
【発明が解決すべき課題】本発明は、以上に説明した従
来の技術における問題点を解決し、前記十字形等のよう
に円周方向に沿って異なる形状等を有する異形のフラン
ジ付きシャフトを精度良く確実に製造し、その歩留まり
と生産性を向上させ得るフランジ付きシャフトの製造方
法と、これに用いる製造装置を提供することを課題とす
る。SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems in the prior art and provides a deformed flanged shaft having a different shape along the circumferential direction such as the cross shape. An object of the present invention is to provide a method of manufacturing a shaft with a flange, which can be manufactured accurately and reliably, and which can improve the yield and productivity, and a manufacturing apparatus used for the method.
【０００６】[0006]
【課題を解決するための手段】本発明は、上記課題を解
決するため、鍛造の際に生じるバリに着目し、係るバリ
内にこれを抜く際の位置決めとなる偏肉部を鍛造と同時
に形成する、ことに着想することにより成されたもので
ある。即ち、本発明のフランジ付きシャフトの製造方法
は、シャフトの端部に径方向に張出した太径部を成形す
る工程と、この成形済みシャフトにおける太径部をダイ
スとポンチにより拡径してフランジを成形する際、当該
フランジと同時に張出すバリ内に１又は２以上の偏肉部
を形成する鍛造工程と、を含む、ことを特徴とする。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention focuses on burrs generated during forging, and forms, at the same time as forging, an uneven thickness portion for positioning when removing the burrs in the burrs. It is made by inspiration. That is, the method for manufacturing a flanged shaft of the present invention includes a step of forming a large diameter portion that protrudes in the radial direction at the end of the shaft, and a step of expanding the large diameter portion of the formed shaft by using a die and a punch. And forming a forging step of forming one or more uneven thickness portions in a burr that projects simultaneously with the flange.
【０００７】これによれば、フランジの成形と同時にそ
の間又はその周囲に張出したバリに偏肉部を同時に形成
でき、追って係るバリを抜き出す際に偏肉部を抜き型に
セットする際の位置決めとして活用でき、そのシャフト
の周方向に沿った位置ずれを防止できる。従って、異形
のフランジ付きシャフトを精度良く確実に製造でき、そ
の歩留まりと生産性を向上させることが可能となる。
尚、偏肉部とはシャフトの軸方向に沿ってバリの位置よ
りも何れかの方向に偏位した部分を指す。また、２以上
の偏肉部の場合、これらは小さなサイズであっても良い
が、偏肉部が１つの場合は当該偏肉部においては、フラ
ンジの径方向に沿ってある程度長めの直線部分を含める
ことにより、上述した位置決めに活用することができ
る。[0007] According to this, the uneven thickness portion can be formed simultaneously with the molding of the flange at the same time as the burrs protruding during or around the flange. It can be utilized, and the displacement of the shaft along the circumferential direction can be prevented. Therefore, a modified flanged shaft can be manufactured accurately and reliably, and the yield and productivity can be improved.
Note that the uneven portion refers to a portion that is displaced in any direction from the burr position along the axial direction of the shaft. In the case of two or more uneven portions, these may be small in size. However, in the case of one uneven thickness portion, a straight portion that is somewhat longer along the radial direction of the flange is used in the uneven thickness portion. By including it, it can be utilized for the positioning described above.
【０００８】また、前記鍛造工程で成形されるフランジ
が、前記シャフトの径方向に沿って放射状に延びる複数
のフランジ片であり、且つ、前記バリがこれらのフラン
ジ片同士の間に位置する、フランジ付きシャフトの製造
方法も含まれる。これによれば、フランジ片同士の間に
バリが確実に形成され、前記偏肉部をバリ内での所望の
位置に任意の数及びサイズにより、確実且つ自在に形成
することができる。更に、前記鍛造工程の後に、前記フ
ランジ及びバリを有するシャフトを雌型又は雄型に前記
偏肉部を位置決めにしてセットし且つ雄型を雌型内に進
入させ上記バリを剪断して抜き出す仕上げ工程を有す
る、フランジ付きシャフトの製造方法も含まれる。これ
によれば、鍛造工程で成形されたフランジ付近のバリに
同時に形成した偏肉部を位置決めとして雄・雌型間でバ
リ抜きを行えるので、所要のフランジ付きシャフトを精
度良く確実に製造でき、その歩留まりを高められる。Further, the flange formed in the forging step is a plurality of flange pieces radially extending along the radial direction of the shaft, and the burr is located between the flange pieces. It also includes a method of manufacturing a shaft with an attachment. According to this, a burr is reliably formed between the flange pieces, and the uneven thickness portion can be reliably and freely formed at a desired position in the burr by an arbitrary number and size. Further, after the forging step, the shaft having the flange and the burr is set in the female mold or the male mold by positioning the uneven thickness portion, and the male mold is advanced into the female mold, and the burr is sheared and extracted. A method of manufacturing a flanged shaft having a step is also included. According to this, since the deburring can be performed between the male and female dies by positioning the uneven thickness portion formed simultaneously on the burr near the flange formed in the forging process, the required flanged shaft can be manufactured accurately and reliably, The yield can be increased.
【０００９】一方、本発明のフランジ付きシャフトの製
造装置は、前記鍛造工程に用いられる装置であって、予
めシャフトの端部に成形された径方向に張出す太径部を
受け入れるダイスのキャビティ内、及び／又は、このキ
ャビティ内に進入するポンチの先端面に、上記太径部を
拡径してフランジを成形すると同時に得られるバリ内に
１又は２以上の偏肉部を形成するための１又は２以上の
凸部又は凹部を設けた、ことを特徴とする。これによれ
ば、前述した製造方法中の鍛造工程において、フランジ
の成形と同時にその間や周囲に張出したバリに偏肉部
を、精度良く確実に形成することができ、上記偏肉部を
位置決めとしてバリを過不足なく除去することが可能と
なる。従って、所要のフランジ付きシャフトの生産性向
上に寄与し得る。尚、ダイス側に凸部を設ける場合はポ
ンチの先端面にこれを受け入れる凹部を設けるが、ダイ
ス側に凹部を設ける場合はポンチの先端面には凸部を設
けず平坦面としても良い。後者の形態でも凹部のみによ
りバリに厚肉の偏肉部が形成できる故である。On the other hand, an apparatus for manufacturing a shaft with a flange according to the present invention is an apparatus used in the forging step, wherein an inside of a cavity of a die for receiving a radially extending large diameter portion formed in advance at an end of the shaft is provided. And / or a method for forming one or two or more uneven thickness portions in a burr obtained at the same time as forming the flange by expanding the large diameter portion on the tip end surface of the punch entering the cavity. Alternatively, two or more projections or depressions are provided. According to this, in the forging step in the above-described manufacturing method, the uneven thickness portion can be accurately and reliably formed on the burr that protrudes during and around the flange at the same time as the forming of the flange, and the uneven thickness portion is positioned. Burrs can be removed without excess or shortage. Therefore, it can contribute to an improvement in productivity of a shaft with a required flange. When a convex portion is provided on the die side, a concave portion for receiving the convex portion is provided on the distal end surface of the punch. However, when a concave portion is provided on the die side, the convex portion may not be provided on the distal end surface of the punch and may be a flat surface. This is because even in the latter mode, a thick uneven portion can be formed in the burr only by the concave portion.
【００１０】尚、本発明は、一般的な円盤状のフランジ
を除き、シャフトの周方向に沿って異なる形状や、肉厚
部を有する異形のフランジを一体に有するシャフトを対
象とし、正多角形や変形多角形のフランジは勿論、楕円
形、十字形、或いは、五稜星や六稜星などの星形の外形
のフランジを有するシャフトも含まれる。また、本発明
の前記成形工程は、丸棒以外の素材から太径部を成形す
る形態も含まれる。更に、本発明の前記鍛造工程は、主
に熱間鍛造により行われるが、いわゆる温間鍛造によっ
て行うことも可能である。The present invention is directed to a shaft having a different shape along the circumferential direction of the shaft and a shaft integrally having a deformed flange having a thick portion, except for a general disk-shaped flange. Shafts having flanges of an elliptical shape, a cross shape, or a star shape such as a five-pointed star or a six-pointed star, as well as a flange of a deformed polygon, are also included. The forming step of the present invention also includes a mode of forming a large diameter portion from a material other than a round bar. Further, the forging step of the present invention is mainly performed by hot forging, but can also be performed by so-called warm forging.
【００１１】[0011]
【発明の実施の形態】以下において本発明の実施に好適
な形態を図面と共に説明する。以下では前記と同じ自動
車用のリヤアクスルシャフトの製造方法について説明す
る。図１(Ａ),(Ｂ)に示すように、構造用炭素鋼等からな
る丸棒(シャフト)１を所要の温度域に加熱してその周面
を拘束し、一端２側を図示しない円錐形状の型を用い軸
方法に沿って据え込み鍛造を施す。これにより、径方向
に円錐形に張出した太径部３が得られる。引き続いて、
別の型を用いて据え込み鍛造を施すと、図１(Ｃ)に示す
ように、上記太径部３よりも更に張出した太径部４をシ
ャフト１の一端２側に有する中間素材(成形済みシャフ
ト)１ａが得られる(成形工程)。Preferred embodiments of the present invention will be described below with reference to the drawings. Hereinafter, a method of manufacturing the same rear axle shaft for a vehicle as described above will be described. As shown in FIGS. 1 (A) and 1 (B), a round bar (shaft) 1 made of structural carbon steel or the like is heated to a required temperature range to restrain its peripheral surface, and one end 2 side is a cone (not shown). Upsetting forging is performed using the shape mold along the axial method. As a result, a large diameter portion 3 that protrudes in a conical shape in the radial direction is obtained. Subsequently,
When upset forging is performed using another mold, as shown in FIG. 1 (C), an intermediate material (molding) having a large diameter portion 4 protruding further than the large diameter portion 3 on one end 2 side of the shaft 1 is formed. Shaft 1a is obtained (forming step).
【００１２】次に、鍛造工程を図１(Ｄ)及び２(Ａ)，
(Ｂ)により説明する。図１(Ｄ)及び２(Ａ)に示すよう
に、上記中間素材１ａは所要の温度域に加熱された状態
でダイス１０にセットされる。このダイス１０は、全体
が略円筒形で図示で左側に開口する円筒形のキャビティ
１４と、その底面１６にて略十字形に凹むフランジ成形
部１８と、この成形部１８を除く底面１６上に突設した
一対の凸部２０を有する。また、底面１６及び上記成形
部１８の中心から図１(Ｄ)及び２(Ａ)で右側にテーパ孔
１３と透孔１２が同軸に貫通している。図示のように、
前記中間素材１ａのシャフト１をキャビティ１４側から
上記各孔１３，１２内に挿入して拘束する。Next, the forging process is shown in FIGS. 1 (D) and 2 (A),
This will be described with reference to FIG. As shown in FIGS. 1D and 2A, the intermediate material 1a is set in a die 10 while being heated to a required temperature range. The die 10 has a substantially cylindrical shape, a cylindrical cavity 14 that opens to the left in the figure, a flange forming portion 18 that is recessed in a substantially cross shape on the bottom surface 16, and a bottom surface 16 excluding the forming portion 18. It has a pair of projecting projections 20. Further, a tapered hole 13 and a through hole 12 penetrate coaxially to the right side in FIGS. 1 (D) and 2 (A) from the center of the bottom surface 16 and the molded portion 18. As shown,
The shaft 1 of the intermediate material 1a is inserted into the holes 13 and 12 from the cavity 14 side and restrained.
【００１３】図１(Ｄ)に示すように、ダイス１０のキャ
ビティ１４内には、左側に示すポンチ２２が押込まれ
る。このポンチ２２は、上記キャビティ１４に進入する
相似形の本体２４と、その先端面２５の中心に略円錐形
の突出部２６を有し、この突出部２６の周囲に上記キャ
ビティ１４の底面１６に達するリング部２８が突設され
ている。このリング部２８には、上記各凸部２０を受け
入れる凹部２７，２７が対応する位置に形成されてい
る。尚、ダイス１０及びポンチ２２は、本発明の製造装
置を構成し、両者は金型用鋼等から成形され、且つその
キャビティ１４内とポンチ２２の先端面２５及び本体２
４の周面には、予め公知の潤滑剤が塗布されている。ま
た、中間素材１ａの太径部４にも同じ潤滑剤が塗布され
ている。As shown in FIG. 1D, a punch 22 shown on the left side is pushed into the cavity 14 of the die 10. The punch 22 has a similar main body 24 that enters the cavity 14 and a substantially conical projection 26 at the center of a tip surface 25 thereof. A reaching ring portion 28 is protruded. In the ring portion 28, concave portions 27, 27 for receiving the respective convex portions 20 are formed at corresponding positions. The die 10 and the punch 22 constitute a manufacturing apparatus according to the present invention, both of which are molded from mold steel or the like, and the inside of the cavity 14 and the tip end face 25 of the punch 22 and the main body 2 are formed.
A well-known lubricant is applied to the peripheral surface of 4 in advance. The same lubricant is also applied to the large diameter portion 4 of the intermediate material 1a.
【００１４】図１(Ｄ)に示す状態で、ポンチ２２を所定
の荷重を伴って矢印のようにダイス１０のキャビティ１
４内に押込む。すると、図２(Ｂ)に示すように、ポンチ
２２の先端面２５におけるリング部２８は、キャビティ
１４の底面１６上に達すると共に、フランジ成形部１８
内に中間素材１ａにおける太径部４の一部を充満させ
る。また、ポンチ２２の突出部２６は、中間素材１ａの
太径部４内に進入する。その結果、図２(Ｂ)に示すよう
に、係る太径部４は、ダイス１０とポンチ２２とにより
挟まれシャフト１の軸方向に沿って据え込まれると同時
に、成形部１８内に進入して径方向に沿って拡径され、
十字形を呈する４つのフランジ片５からなるフランジに
成形される。この際、フランジ片５，５間と各フランジ
片５の外側には太径部４の一部がバリ８となって放射状
に張出す。尚、上記ポンチ２２の突出部２６は、太径部
４を押圧して円形の凹み６を形成する(熱間鍛造工程)。In the state shown in FIG. 1 (D), the punch 22 is pressed with a predetermined load into the cavity 1 of the die 10 as shown by an arrow.
Push into 4. Then, as shown in FIG. 2 (B), the ring portion 28 on the tip end surface 25 of the punch 22 reaches the bottom surface 16 of the cavity 14 and the flange forming portion 18
A part of the large diameter portion 4 of the intermediate material 1a is filled therein. Further, the projecting portion 26 of the punch 22 enters the large diameter portion 4 of the intermediate material 1a. As a result, as shown in FIG. 2 (B), the large-diameter portion 4 is sandwiched between the die 10 and the punch 22, is set up in the axial direction of the shaft 1, and at the same time enters the forming portion 18. And expanded along the radial direction,
It is formed into a flange composed of four flange pieces 5 having a cross shape. At this time, a part of the large-diameter portion 4 becomes a burr 8 and extends radially between the flange pieces 5 and 5 and outside of each flange piece 5. The projecting portion 26 of the punch 22 presses the large diameter portion 4 to form a circular recess 6 (hot forging step).
【００１５】上記ポンチ２２を左側に後退させた後、ダ
イス１０から係る成形物を取出すと、図３(Ａ)に示すよ
うな成形シャフト(シャフト)１ｂが得られる。図示のよ
うに、この成形シャフト１ｂは、シャフト１の左端の中
心に円形の凹み６と、その径方向に十字形で互いに対称
な４つのフランジ片５からなるフランジとを有し、これ
らとシャフト１の間にテーパ部７が形成される。また、
フランジ片５，５間及び各フランジ片５の外周には薄肉
で略円形のバリ８が張出しており、且つ前記凸部２０と
凹部２７とによって、これらに対応するバリ８内におけ
る所定の位置に略台形を呈する一対の偏肉部９，９が形
成されている。After the punch 22 is retracted to the left and the molded product is taken out from the die 10, a molded shaft (shaft) 1b as shown in FIG. 3A is obtained. As shown in the figure, the molded shaft 1b has a circular recess 6 at the center of the left end of the shaft 1 and a flange composed of four flange pieces 5 symmetrical to each other in a cross shape in the radial direction. 1, a tapered portion 7 is formed. Also,
Thin and substantially circular burrs 8 project between the flange pieces 5 and 5 and on the outer periphery of each flange piece 5, and are formed at predetermined positions in the burrs 8 corresponding to these by the convex portions 20 and the concave portions 27. A pair of uneven thickness portions 9 having a substantially trapezoidal shape are formed.
【００１６】そして、係る成形シャフト１ｂからバリ８
を除去する仕上げ工程を行う。図３(Ｂ)に示すように、
バリ８を除去するため、図示で右側の雌型３０とこれに
進入する左側の雄型３６とを用いる。雌型３０は、全体
が略円筒体で各フランジ片５からなる十字形のフランジ
と相似形をなす断面十字形の抜き孔３２を内設し、その
端面３１上には上記シャフト１ｂの偏肉部９，９内に嵌
入する位置決め片３４，３４が突設されている。一方、
雄型３６は上記フランジと相似形の断面略十字形を呈し
且つ上記抜き孔３２内に進入する本体３８からなる。
尚、図３(Ｂ)では、成形シャフト１ｂは偏肉部９付近のバ
リ８における断面を示しており、図示でその前後に位置
する各フランジ片５は省略されている。また、雄・雌型
３６，３０も金型用鋼等から製作されたものであり、且
つ雌型３０は割型構造となっている。Then, a burr 8 is formed from the formed shaft 1b.
A finishing step of removing As shown in FIG.
In order to remove the burr 8, a female die 30 on the right side and a male die 36 on the left side entering the female die 30 are used. The female mold 30 has a substantially cylindrical body as a whole, and has a cross-shaped cross-shaped hole 32 similar to the cross-shaped flange formed by the flange pieces 5 therein. Positioning pieces 34, 34 that fit into the portions 9, 9 protrude. on the other hand,
The male mold 36 has a substantially cross-sectional shape similar to the flange, and includes a main body 38 that enters the hole 32.
In FIG. 3B, the molded shaft 1b shows a cross section of the burr 8 near the uneven thickness portion 9, and the flange pieces 5 located before and after the burr 8 in the drawing are omitted. The male and female molds 36 and 30 are also made of mold steel, and the female mold 30 has a split mold structure.
【００１７】図３(Ｂ)に示すように、成形シャフト１ｂ
のシャフト１を左側から雌型３０の抜き孔３２に挿入す
ると共に、各フランジ片５を雌型３０の端面３１に接触
させる。この際、バリ８内の偏肉部９,９を位置決め片
３４,３４にそれぞれ嵌合させることにより、係るシャ
フト１ｂの周方向の位置決めを行うことができる。即
ち、成形シャフト１ｂの各フランジ片５は、抜き孔３２
の各突出部分３３及び雄型３６の本体３８の各突出部分
３７と共に、図３(Ｂ)の左右方向において互いに相似形
となる姿勢になった状態となる。As shown in FIG. 3B, the molded shaft 1b
Is inserted into the hole 32 of the female mold 30 from the left side, and each flange piece 5 is brought into contact with the end face 31 of the female mold 30. At this time, by fitting the uneven thickness portions 9, 9 in the burr 8 to the positioning pieces 34, 34, the positioning of the shaft 1 b in the circumferential direction can be performed. That is, each flange piece 5 of the molded shaft 1b is
3B and the respective projecting portions 37 of the main body 38 of the male mold 36 together with each other in a posture similar to each other in the left-right direction of FIG. 3B.
【００１８】係る状態で、雄型３６の本体３８を図３
(Ｂ)中の矢印に沿って右側にスライドし、雌型３０の抜
き孔３２内に進入させる。その結果、図３(Ｃ)に示すよ
うに、十字形のフランジを形成する４つのフランジ片５
とバリ８との間で剪断が行われる。即ち、各偏肉部９を
含むバリ８は各フランジ片５から分離され、雌型３０の
端面３１上に残留すると共に、各フランジ片５を含むシ
ャフト１は雄型３６と共に抜き孔３２内を移動する。係
るバリ８が抜き出されたシャフト１ｂを、分割した雌型
３０の抜き孔３２内から取り出す。その結果、図３(Ｄ)
に示すように、フランジ片５，５間やその周囲のバリ８
が過不足なく除去され、４つのフランジ片５からなる十
字形のフランジを一端に有するリヤアクスルシャフト
（フランジ付きシャフト)１ｃを得ることができる。In this state, the main body 38 of the male mold 36 is
(B) Slide to the right along the arrow in FIG. As a result, as shown in FIG. 3C, four flange pieces 5 forming a cross-shaped flange are formed.
Shearing is performed between the burrs 8. That is, the burr 8 including each uneven portion 9 is separated from each flange piece 5 and remains on the end face 31 of the female die 30, and the shaft 1 including each flange piece 5 passes through the hole 32 together with the male die 36. Moving. The shaft 1b from which the burr 8 has been extracted is taken out from the inside of the hole 32 of the divided female mold 30. As a result, FIG.
As shown in FIG.
And a rear axle shaft (flanged shaft) 1c having a cross-shaped flange composed of four flange pieces 5 at one end can be obtained.
【００１９】以上に説明した製造方法によれば、鍛造工
程においてダイス１０とポンチ２２に凸部２０と凹部２
７をバリ８の張り出す位置に設けて、中間素材１ａの太
径部４を据え込み鍛造を行うので、成形される各フラン
ジ片５は所定の形状になり、且つバリ８の所定の位置に
偏肉部９，９を同時に形成できる。これにより、次の仕
上げ工程において、各偏肉部９を活用して成形シャフト
１ｂを雄・雌型３６，３０に精度良く位置決めでき、バ
リ８を過不足なく確実に剪断にて抜き出すことができ
る。従って、４つのフランジ片５を十字形にした異形の
フランジを一端に有するフランジ付きシャフト１ｃを形
状・寸法精度良く容易で且つ確実に製造することが可能
となる。また、前記ダイス１０及びポンチ２２からなる
製造装置によれば、上述した鍛造工程を確実に実施する
ことができる。According to the manufacturing method described above, the projections 20 and the recesses 2 are formed on the die 10 and the punch 22 in the forging process.
7 is provided at a position where the burr 8 projects, and the large diameter portion 4 of the intermediate material 1a is upset and forged. Therefore, each flange piece 5 to be formed has a predetermined shape and is located at a predetermined position of the burr 8. The uneven portions 9 can be formed simultaneously. Thereby, in the next finishing step, the molded shaft 1b can be accurately positioned on the male / female dies 36 and 30 by utilizing the uneven thickness portions 9, and the burrs 8 can be reliably removed without any excess or shortage. . Accordingly, it is possible to easily and reliably manufacture the shaft 1c with a flange having one end having a deformed flange in which the four flange pieces 5 are formed in a cross shape with good shape and dimensional accuracy. Moreover, according to the manufacturing apparatus including the die 10 and the punch 22, the forging process described above can be reliably performed.
【００２０】尚、前記と逆にダイス１０側に凹部２７
を、ポンチ２２側に凸部２０を設けても同様の偏肉部９
を形成できる。この場合、ダイス１０側にのみ凹部２７
を設け且つポンチ２２側の凸部２０を省略しても、上記
凹部２７によりバリ８内に厚肉とした偏肉部を形成する
ことが可能である。また、凸部２０及び／又は凹部２７
は、二対以上併設しても良く、或いは一つの凸部２０及
び／又は凹部２７のみとしても良い。後者の場合には凸
部２０や凹部２７には、シャフト１の径方向に平行な長
めの直線部分が含まれている必要がある。この直線部分
により、成形シャフト１ｂのシャフト１の円周方向への
回転によるずれを防止できるためである。Contrary to the above, the concave portion 27 is formed on the die 10 side.
Even if the protrusion 20 is provided on the punch 22 side, the same uneven thickness portion 9
Can be formed. In this case, the recess 27 is formed only on the die 10 side.
Is provided, and even if the convex portion 20 on the punch 22 side is omitted, it is possible to form a thick uneven portion in the burr 8 by the concave portion 27. In addition, the protrusion 20 and / or the recess 27
May be provided in two or more pairs, or only one projection 20 and / or recess 27 may be provided. In the latter case, the convex portion 20 and the concave portion 27 need to include a long linear portion parallel to the radial direction of the shaft 1. This is because the linear portion can prevent the displacement of the molded shaft 1b due to the rotation of the shaft 1 in the circumferential direction.
【００２１】図４(Ａ)は異なる形態の成形シャフト１ｄ
を示す。この成形シャフト１ｄは、前記中間素材１ａを
前記同様のダイス１０及びポンチ２２を用いて太径部４
を熱間で据え込み鍛造したものである。図４(Ａ)に示す
ように、シャフト１の一端にテーパ部７を介して円形の
凹み６を中心に放射状で対称に６つのフランジ片５から
なるフランジと、これらの間と周囲にバリ８を有する。
バリ８内には一対の偏肉部９，９が同時に形成されてい
る。従って、６つのフランジ片５と断面が相似形の抜き
孔３２を有する前記雌型３０と同じく相似形断面の前記
雄型３６を用い、且つ各偏肉部９を活用して位置決めす
ることにより、バリ８を過不足なく除去したフランジ付
きシャフト(１ｄ)を容易且つ確実に製造することが可能
である。FIG. 4A shows a molded shaft 1d of a different form.
Is shown. The molded shaft 1d is formed by using the same die 10 and punch 22 as described above for the intermediate material 1a.
Was hot upset and forged. As shown in FIG. 4 (A), a flange composed of six flange pieces 5 radially and symmetrically around a circular recess 6 at one end of a shaft 1 via a tapered portion 7, and burrs 8 between and around these. Having.
A pair of uneven thickness portions 9 are formed in the burr 8 at the same time. Therefore, by using the male mold 36 having a similar cross-section as the female mold 30 having the through hole 32 having a similar cross-section to the six flange pieces 5 and positioning by utilizing each of the uneven thickness portions 9, It is possible to easily and reliably manufacture the flanged shaft (1d) from which the burrs 8 have been removed without excess or deficiency.
【００２２】図４(Ｂ)は更に異なる形態の成形シャフト
１ｅを示す。この成形シャフト１ｅも、前記中間素材１
ａを前記ダイス１０及びポンチ２２と同様の装置を用い
て太径部４を熱間で据え込み鍛造したもので、図４(Ｂ)
に示すように、シャフト１の一端にテーパ部７を介して
円形の凹み６を中心に正八角形のフランジ５ａと、その
周囲に略円形で薄肉のバリ８を有する。バリ８の周縁に
は、一対の偏肉部９，９が鍛造と同時に形成されてい
る。従って、フランジ５ａと断面が相似形の抜き孔を有
する雌型と、これと同じ相似形断面の前記雄型を用いる
と共に、各偏肉部９を活用して位置決めすることによ
り、バリ８を過不足なく除去したフランジ付きシャフト
(１ｅ)を精度良く確実に製造することが可能となる。FIG. 4B shows a molded shaft 1e having a further different form. This molded shaft 1e is also used for the intermediate material 1.
FIG. 4 (B) is a diagram in which a large diameter portion 4 is hot-upset and forged using a device similar to the die 10 and the punch 22.
As shown in FIG. 1, a shaft 5 has a regular octagonal flange 5a centered on a circular recess 6 via a tapered portion 7 via a tapered portion 7, and a substantially circular thin burr 8 around the flange 5a. A pair of uneven thickness portions 9 are formed on the periphery of the burr 8 simultaneously with the forging. Accordingly, by using a female mold having a hole having a similar cross section to the flange 5a and the male mold having the same similar cross section, and by utilizing the uneven thickness portions 9 for positioning, the burr 8 can be removed. Shaft with flange removed completely
(1e) can be manufactured accurately and reliably.
【００２３】本発明は以上において説明した各形態に限
定されるものではない。例えば、シャフトの端部に太径
部を成形する工程は、前述した据え込み鍛造に限らず、
型鍛造やその他の鋳造方法によって行うことも可能であ
る。また、フランジの形状は前述した形態の他に、シャ
フトの円周方向に沿って肉厚が異なる部分を有するフラ
ンジや、或いは中心と周辺との間に両者よりも薄肉又は
厚肉の複数の中間部分を間隔を置いて有する異形のフラ
ンジも含まれる。しかも、係るフランジは１つのシャフ
トの両端部に成形しても良く、且つこれらのフランジが
互いに異なる形状等を有するものであって良い。The present invention is not limited to the embodiments described above. For example, the process of forming a large diameter portion at the end of the shaft is not limited to the upsetting forging described above,
It is also possible to carry out by die forging or other casting methods. Further, in addition to the above-described embodiment, the shape of the flange may be a flange having a portion having a different thickness along the circumferential direction of the shaft, or a plurality of intermediate portions thinner or thicker than both between the center and the periphery. A profiled flange having spaced portions is also included. Moreover, such flanges may be formed at both ends of one shaft, and these flanges may have shapes different from each other.
【００２４】更に、前記仕上げ工程では、成形シャフト
のシャフトを雌型の抜き孔内に挿入し且つフランジをそ
の端面に接触して位置決めしたが、逆に成形シャフトの
フランジをその偏肉部により位置決めして雄型の先端に
セットし、これらに雌型の抜き孔を進入させるようにし
ても良い。尚、製造装置では、図１(Ａ)〜(Ｃ)の据え込
み鍛造を行う複数組のダイスとポンチを前記ダイス１０
とポンチ２２に並列に隣接して配置すると共に、この反
対側にバリ抜きを行う雄・雌型を並列に隣接して配置す
ることも可能である。これにより、素材の丸棒１から中
間素材１ａ、成形シャフト１ｂ、及びフランジ付きシャフ
ト１ｃを順送りにして迅速に各工程を施し、自動成形を
行うこともできる。Further, in the finishing step, the shaft of the molded shaft is inserted into the female hole and the flange is positioned in contact with the end face. Conversely, the flange of the molded shaft is positioned by the uneven thickness portion. Then, they may be set at the tips of the male mold, and the female holes may be inserted into these. In the manufacturing apparatus, a plurality of sets of dies and punches for performing the upsetting forging shown in FIGS.
And the punch 22 can be arranged in parallel and adjacent to each other, and on the opposite side, male and female molds for deburring can be arranged in parallel and adjacent to each other. Thereby, the intermediate material 1a, the forming shaft 1b, and the flanged shaft 1c are sequentially fed from the material round bar 1, and the respective steps can be performed quickly to perform automatic forming.
【００２５】[0025]
【発明の効果】以上において説明した本発明の製造方法
によれば、フランジの成形と同時にその間又はその周囲
に張出したバリに偏肉部を同時に形成でき、追って係る
バリを抜き出す際に上記偏肉部を抜き型にセットする際
の位置決めとして活用でき、そのシャフトの周方向に沿
った位置ずれを防止することができる。従って、所要の
異形なフランジ付きシャフトを精度良く確実に製造で
き、その歩留まりと生産性を向上させることが可能にな
る。また、本発明の製造装置によれば、上記製造方法中
の鍛造工程において、フランジの成形と同時にその間や
周囲に張出したバリに偏肉部を、精度良く確実に形成す
ることができ、フランジ付きシャフトの生産性向上に寄
与できる。According to the manufacturing method of the present invention described above, the uneven thickness portion can be simultaneously formed on the burr protruding during or around the flange at the same time as the formation of the flange. It can be used as positioning when the part is set in the punching die, and the displacement of the shaft along the circumferential direction can be prevented. Accordingly, a required irregularly shaped flanged shaft can be manufactured accurately and reliably, and the yield and productivity can be improved. Further, according to the manufacturing apparatus of the present invention, in the forging step in the above manufacturing method, the uneven thickness portion can be accurately and reliably formed on the burr protruding during and around the flange simultaneously with forming the flange, and the flange is provided. It can contribute to the improvement of shaft productivity.
【図１】(Ａ)乃至(Ｃ)は本発明方法におけるシャフトの
端部に太径部を成形する工程を示す概略図、(Ｄ)は本発
明方法の鍛造工程を示すダイスとポンチの断面図。FIGS. 1A to 1C are schematic views showing a step of forming a large diameter portion at an end of a shaft in a method of the present invention, and FIG. 1D is a cross section of a die and a punch showing a forging step of the method of the present invention. FIG.
【図２】(Ａ)は中間素材をダイスにセットした状態を示
す断面を含む斜視図、(Ｂ)は鍛造工程の終期を示すダイ
スとポンチ等の断面図。FIG. 2A is a perspective view including a cross-section showing a state in which an intermediate material is set in a die, and FIG. 2B is a cross-sectional view of a die, a punch and the like showing the end of a forging process.
【図３】(Ａ)は図２(Ｂ)の鍛造工程により得られた成形
シャフトの斜視図、(Ｂ)と(Ｃ)は本発明方法の仕上げ工
程を示す概略図、(Ｄ)はその結果得られるフランジ付き
シャフトの斜視図。3 (A) is a perspective view of a formed shaft obtained by the forging step of FIG. 2 (B), (B) and (C) are schematic views showing a finishing step of the method of the present invention, and (D) is a plan view thereof. FIG. 4 is a perspective view of the resulting flanged shaft.
【図４】(Ａ)及び(Ｂ)は異なる形態の各成形シャフトを
示す斜視図。4 (A) and 4 (B) are perspective views showing different shaped shafts in different forms.
【図５】(Ａ)乃至(Ｃ)はシャフトの端部に太径部を成形
する工程を示す概略図、(Ｄ)及び(Ｅ)は従来の製造方法
における各工程を示す概略図、(Ｆ)はこれにより得られ
たフランジ付きシャフトの斜視図。5 (A) to 5 (C) are schematic diagrams showing a step of forming a large diameter portion at an end of a shaft, (D) and (E) are schematic diagrams showing each step in a conventional manufacturing method, (F) is a perspective view of the flanged shaft obtained thereby.
１…………………丸棒／シャフト １ａ………………中間素材 １ｂ,１ｄ,１ｅ…成形シャフト １ｃ………………リヤアクスルシャフト(フランジ付き
シャフト) ２…………………一端(端部) ３，４……………太径部， ５．５ａ…………フランジ片(フランジ) ８…………………バリ ９…………………偏肉部 １０………………ダイス １４………………キャビティ ２０………………凸部 ２２………………ポンチ ２５………………先端面 ２７………………凹部 ３０………………雌型 ３６………………雄型1 Round rod / shaft 1a Intermediate material 1b, 1d, 1e Molded shaft 1c Rear axle shaft (shaft with flange) 2 …………… … One end (end part) 3, 4 ……… Large diameter part, 5.5a ……… Flange piece (flange) 8 ……… Burr 9 …………… Uneven thickness part 10 Die 14 Die 14 Cavity 20 Convex part 22 Punch 25 Tip face 27 Concave part 30 ... female type 36 ... male type
Claims (4)
を成形する工程と、 上記成形済みシャフトにおける太径部をダイスとポンチ
により拡径してフランジを成形する際、当該フランジと
同時に張出すバリ内に１又は２以上の偏肉部を形成する
鍛造工程と、を含む、 ことを特徴とするフランジ付きシャフトの製造方法。A step of forming a large-diameter portion protruding radially at an end of the shaft; and forming the flange by expanding the large-diameter portion of the formed shaft with a die and a punch. A forging step of forming one or more uneven portions in burrs that are simultaneously extended.
記シャフトの径方向に沿って放射状に延びる複数のフラ
ンジ片であり、且つ、前記バリがこれらのフランジ片同
士の間に位置する、 ことを特徴とする請求項１に記載のフランジ付きシャフ
トの製造方法。2. A flange formed in the forging step is a plurality of flange pieces extending radially along a radial direction of the shaft, and the burrs are located between the flange pieces. The method for manufacturing a shaft with a flange according to claim 1, wherein:
リを有するシャフトを雌型又は雄型に前記偏肉部を位置
決めにしてセットし且つ雄型を雌型内に進入させ上記バ
リを剪断して抜き出す仕上げ工程を有する、 ことを特徴とする請求項１又は２に記載のフランジ付き
シャフトの製造方法。3. After the forging step, the shaft having the flange and the burrs is set in the female mold or the male mold with the uneven thickness portion positioned, and the male mold is advanced into the female mold to shear the burrs. The method for producing a flanged shaft according to claim 1 or 2, further comprising a finishing step of extracting the shaft.
置であって、 予めシャフトの端部に成形された径方向に張出す太径部
を受け入れるダイスのキャビティ内、及び／又は、この
キャビティ内に進入するポンチの先端面に、上記太径部
を拡径してフランジを成形すると同時に得られるバリ内
に１又は２以上の偏肉部を形成するための１又は２以上
の凸部又は凹部を設けた、 ことを特徴とするフランジ付きシャフトの製造装置。4. An apparatus used in the forging step according to claim 1, wherein the die is adapted to receive a large-diameter portion which is formed in advance in an end portion of a shaft and which protrudes in a radial direction, and / or the inside of the die. One or two or more convex portions for forming one or two or more uneven portions in burrs obtained at the same time as forming the flange by expanding the large diameter portion on the tip end surface of the punch entering the cavity. Or a manufacturing apparatus of a shaft with a flange, provided with a concave portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11190641A JP2001018032A (en) | 1999-07-05 | 1999-07-05 | Manufacture of flanged shaft, and manufacturing device used therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11190641A JP2001018032A (en) | 1999-07-05 | 1999-07-05 | Manufacture of flanged shaft, and manufacturing device used therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001018032A true JP2001018032A (en) | 2001-01-23 |
Family
ID=16261463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11190641A Withdrawn JP2001018032A (en) | 1999-07-05 | 1999-07-05 | Manufacture of flanged shaft, and manufacturing device used therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001018032A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009006338A (en) * | 2007-06-27 | 2009-01-15 | Daido Steel Co Ltd | Method for manufacturing rod-like forged part with deformed flange |
| CN101947634A (en) * | 2010-09-03 | 2011-01-19 | 东风汽车有限公司 | Forging process for flange of half shaft of automobile rear axle |
| CN104028685A (en) * | 2014-06-20 | 2014-09-10 | 重庆大学 | L-shaped-section large forging blank manufacturing method |
| CN104259362A (en) * | 2014-10-21 | 2015-01-07 | 中国第一重型机械股份公司 | Nuclear reactor integrating lower end socket integrity profiling and forging method |
| KR20200109142A (en) * | 2019-03-12 | 2020-09-22 | (주)센트랄모텍 | Forging Method with Reduced Trimming Burr Problems |
| CN113909379A (en) * | 2021-10-11 | 2022-01-11 | 中北大学 | Precision extrusion forming die of anchoring flange |
-
1999
- 1999-07-05 JP JP11190641A patent/JP2001018032A/en not_active Withdrawn
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009006338A (en) * | 2007-06-27 | 2009-01-15 | Daido Steel Co Ltd | Method for manufacturing rod-like forged part with deformed flange |
| CN101947634A (en) * | 2010-09-03 | 2011-01-19 | 东风汽车有限公司 | Forging process for flange of half shaft of automobile rear axle |
| CN101947634B (en) * | 2010-09-03 | 2012-09-26 | 东风汽车有限公司 | Forging process for flange of half shaft of automobile rear axle |
| CN104028685A (en) * | 2014-06-20 | 2014-09-10 | 重庆大学 | L-shaped-section large forging blank manufacturing method |
| CN104028685B (en) * | 2014-06-20 | 2015-11-04 | 重庆大学 | A kind of L-type cross section heavy forging blank-making method |
| CN104259362A (en) * | 2014-10-21 | 2015-01-07 | 中国第一重型机械股份公司 | Nuclear reactor integrating lower end socket integrity profiling and forging method |
| KR20200109142A (en) * | 2019-03-12 | 2020-09-22 | (주)센트랄모텍 | Forging Method with Reduced Trimming Burr Problems |
| KR102198588B1 (en) * | 2019-03-12 | 2021-01-05 | (주)센트랄모텍 | Forging Method with Reduced Trimming Burr Problems |
| CN113909379A (en) * | 2021-10-11 | 2022-01-11 | 中北大学 | Precision extrusion forming die of anchoring flange |
| CN113909379B (en) * | 2021-10-11 | 2023-10-13 | 中北大学 | Precise extrusion forming die for anchoring flange |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2002517318A (en) | Manufacturing method of tubular member | |
| JP2002213476A (en) | Method of manufacturing tripod constant velocity universal joint outer race | |
| JP2004058148A (en) | Method for manufacturing bushing | |
| US4294101A (en) | Method of making single or double flanged track tractor roller for off-highway equipment | |
| JP2001018032A (en) | Manufacture of flanged shaft, and manufacturing device used therefor | |
| JP2008302403A (en) | Method for producing inner ring and outer ring of rolling bearing | |
| JPH0369613B2 (en) | ||
| JP2001286961A (en) | Forming method of stock for rotation part from plate material | |
| GB2356590A (en) | Method of manufacturing preform for connecting rod | |
| JP2010029910A (en) | Outside joint member | |
| JP2011136367A (en) | Method of manufacturing nut having vertical groove | |
| JP2008279481A (en) | Method for manufacturing inner race and outer race of rolling bearing | |
| JP2920132B1 (en) | Method for manufacturing stepped annular member and inner and outer ring members | |
| US4342213A (en) | Closed chamber extrusion method and apparatus for shaping of metal rod into tulip-shaped part | |
| JPH0223257B2 (en) | ||
| JP2502953B2 (en) | Method for manufacturing shaft-shaped component having flanges at both ends | |
| JP2777997B2 (en) | Method for manufacturing shaft-shaped part having spherical head | |
| JPS5926381B2 (en) | Manufacturing method of tightening roller type coaster type coupling sleeve | |
| JP2825800B2 (en) | Method for forging and forging a cylindrical part having a substantially spherical bulge at the center | |
| JP3517771B2 (en) | Manufacturing method of nut with washer | |
| JP2003343672A (en) | Forming method of hollow shaft pulley for belt type continuously variable transmission | |
| JP3992411B2 (en) | Connecting rod preform manufacturing equipment | |
| JP3657483B2 (en) | Manufacturing method of preform for connecting rod | |
| JP2002172450A (en) | Method for producing spherical surface product | |
| JP4234224B2 (en) | Groove machining method and manufacturing method for automobile steering main shaft |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20060905 |