JP3364123B2 - Manufacturing method of bossed drum - Google Patents
Manufacturing method of bossed drumInfo
- Publication number
- JP3364123B2 JP3364123B2 JP23147397A JP23147397A JP3364123B2 JP 3364123 B2 JP3364123 B2 JP 3364123B2 JP 23147397 A JP23147397 A JP 23147397A JP 23147397 A JP23147397 A JP 23147397A JP 3364123 B2 JP3364123 B2 JP 3364123B2
- Authority
- JP
- Japan
- Prior art keywords
- boss
- drum
- punch
- diameter
- small
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Forging (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Description
【発明の詳細な説明】Detailed Description of the Invention
【０００１】[0001]
【発明の属する技術分野】本発明はボス付きドラムの製
造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a boss drum.
【０００２】[0002]
【従来の技術】自動車の変速機に使用するドラム付きク
ラッチギヤは、ドラムとクラッチギヤとを一体に結合し
たものであり、この結合方法については、例えば特開昭
６２−１３８２６号公報「ドラム付きクラッチギア」に
提案されている。この技術は、同公報の第１図に示され
る通り、ドラム部及びギヤ部を個別に加工した後、それ
ぞれの部材を加締めや溶接で結合するものである。2. Description of the Related Art A clutch gear with a drum used for a transmission of an automobile is one in which a drum and a clutch gear are integrally coupled. This coupling method is disclosed, for example, in Japanese Patent Application Laid-Open No. 62-13826. Clutch gear ". According to this technique, as shown in FIG. 1 of the publication, after the drum portion and the gear portion are individually processed, the respective members are joined by caulking or welding.
【０００３】しかし、ドラム部とギヤ部とを加締めや溶
接で結合すると、ドラム部に対するギヤ部の同軸精度
（以下「同軸度」と記す）度を出すことが難しく、ま
た、溶接で結合すると溶接熱による歪がギヤ部に発生す
る虞れがある。このため、ドラム付きクラッチギヤの品
質を均一に保つことが難しい。また、ドラム部とギヤ部
とを個別に加工した後、それぞれを結合するので、製造
に手間がかかりドラム付きクラッチギヤのコストを下げ
ることが難しい。However, if the drum portion and the gear portion are joined by caulking or welding, it is difficult to obtain the degree of coaxial accuracy (hereinafter referred to as "coaxiality") of the gear portion with respect to the drum portion, and if they are joined by welding. Distortion due to welding heat may occur in the gear portion. Therefore, it is difficult to keep the quality of the clutch gear with the drum uniform. In addition, since the drum portion and the gear portion are individually processed and then joined together, it is difficult to manufacture and it is difficult to reduce the cost of the clutch gear with a drum.
【０００４】一方、自動二輪車のリヤブレーキに使用す
るボス付きドラムは、ボスをリヤアクスルに取り付けて
ドラムの内側にブレーキシューを設けたものであって、
ブレーキシューでドラムの内周を押圧することにより後
輪の回転を制御するものである。このボス付きドラム
は、プレス成形したドラムと、鍛造成形して内周にスプ
ライン歯を加工したボスとからなり、ドラムとボスとを
個別に形成した後、ドラムにボスを圧入して溶接で結合
した部材である。On the other hand, a drum with a boss used for a rear brake of a motorcycle has a boss attached to a rear axle and a brake shoe provided inside the drum.
The brake shoe presses the inner circumference of the drum to control the rotation of the rear wheels. This drum with a boss consists of a press-molded drum and a boss that is forged and processed with spline teeth on the inner circumference.After the drum and the boss are individually formed, the boss is press-fitted into the drum and joined by welding. It is a member.
【０００５】[0005]
【発明が解決しようとする課題】このボス付きドラム
も、上記公報の技術と同様に、ボスとドラムとを個別に
加工した後、それぞれの部材を結合する。このため、ド
ラムに対するボスの同軸度を出すことが難しく、また、
溶接で結合すると溶接熱による歪がボスやドラムに発生
する虞れがある。このため、ボス付きドラムの品質を均
一に保つことが難しい。また、ドラムとボスとを個別に
加工した後、それぞれを結合するので、製造に手間がか
かりボス付きドラムのコストを下げることが難しい。In the drum with a boss, like the technique of the above publication, the boss and the drum are individually processed and then the respective members are joined. Therefore, it is difficult to achieve the coaxiality of the boss with respect to the drum, and
If they are joined by welding, distortion due to welding heat may occur in the boss and the drum. Therefore, it is difficult to keep the quality of the boss drum uniform. Further, since the drum and the boss are individually processed and then joined together, it is difficult to manufacture and it is difficult to reduce the cost of the drum with the boss.
【０００６】そこで、本発明の目的は、品質を均一に維
持することが容易で、且つコストを下げることができる
技術を提供することにある。Therefore, an object of the present invention is to provide a technique capable of easily maintaining uniform quality and reducing the cost.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に請求項１は、中央の小径筒状ボスと、このボスを同心
的に囲う大径筒状ドラムと、これらボスとドラムの一端
同士をつなぐ底部とからなるボス付きドラムの製造方法
であって、予め中央に孔を開けた平板を絞って有底筒状
体を成形する工程と、この有底筒状体の中央部を逆絞り
して開口側に向って小径筒部を成形する工程と、この小
径筒部を縮径し且つ軸方向に潰すことにより増肉してボ
スにする工程と、このボスの外周をパンチリングの内周
に接触させ、ボスの基端をノックアウトリングの上端に
接触させ、かつボスの先端をパンチの下端に接触させる
ことにより、ボスの外周、基端及び先端の３箇所を拘束
し、この状態でボスの内周を歯型パンチでしごくことに
より内周にスプライン歯を成形する工程とからなること
を特徴とする。To achieve the above object, the first aspect of the present invention is to provide a central small-diameter cylindrical boss, a large-diameter cylindrical drum concentrically surrounding the boss, and one end of the boss and the other drum. A method of manufacturing a drum with a boss consisting of a bottom part that connects a bottom part and a bottom part that connects the bottom part to each other. To form a small-diameter tubular portion toward the opening side, a step of reducing the diameter of the small-diameter tubular portion and crushing it in the axial direction to increase the thickness to form a boss, and the outer periphery of the boss inside the punch ring. Lap
To the top of the knockout ring.
Contact, and contact the tip of the boss with the bottom edge of the punch
This restricts the outer periphery , the base end and the tip of the boss, and in this state, the inner periphery of the boss is squeezed by a tooth punch to form spline teeth on the inner periphery. .
【０００８】ボスの外周、基端及び先端の３箇所を拘束
しつつ、ボスの内周を歯形パンチでしごいて、スプライ
ン歯を成形する。従って、ボス孔より大径の歯形パンチ
をボス孔に押し込んでも、この歯形パンチに押されてボ
スが外側に膨らむ虞れはない。このため、ボスの内周に
歯形パンチでスプライン歯を精度よく成形することがで
きる。Spline teeth are formed by squeezing the inner circumference of the boss with a tooth-shaped punch while restraining the outer circumference, the base end and the tip of the boss. Therefore, even if a tooth-shaped punch having a diameter larger than that of the boss hole is pushed into the boss hole, there is no possibility that the tooth-shaped punch is pushed by the tooth-shaped punch and the boss bulges outward. Therefore, it is possible to accurately form the spline teeth on the inner circumference of the boss with the tooth profile punch.
【０００９】請求項２は、中央の小径筒状ボスと、この
ボスを同心的に囲う大径筒状ドラムと、これらボスとド
ラムの一端同士をつなぐ底部とからなるボス付きドラム
の製造方法であって、予め中央に孔を開けた平板を絞っ
て有底筒状体を成形する工程と、この有底筒状体の中央
部を逆絞りして開口側に向って小径筒部を成形する工程
と、この小径筒部を縮径し且つ軸方向に潰すことにより
増肉してボスにする工程と、このボスの外周、基端及び
先端の３箇所を拘束し、この状態でボスの内周を歯型パ
ンチでしごくことにより内周にスプライン歯を成形する
と同時に、有底筒状体の開口端部を仕上げてドラムにす
る工程とからなることを特徴とする。スプライン歯の成
形工程とドラム化工程とを同時に実施する。工程数が少
なくなったので生産サイクルタイムを短縮することがで
きる。According to a second aspect of the present invention, a small-diameter cylindrical boss in the center and
A large-diameter cylindrical drum that concentrically surrounds the boss, and the boss and the drum.
A drum with a boss that consists of a bottom that connects the ends of the ram.
This is a manufacturing method of, and squeezing a flat plate with a hole in the center in advance.
To form a bottomed tubular body and the center of this bottomed tubular body
Process of forming a small-diameter cylindrical part toward the opening side by reverse drawing
By reducing the diameter of this small-diameter cylinder and crushing it in the axial direction,
The process of increasing the thickness to make a boss, and the outer circumference, base end and
Restrain the three points at the tip, and in this state
<br/> simultaneously forming the spline teeth on the inner circumference by squeezing in inches, characterized in that it consists of a step of the drum to finish the open end of the bottomed cylindrical body. The spline tooth forming step and the drum forming step are performed at the same time. Since the number of steps is reduced, the production cycle time can be shortened.
【００１０】[0010]
【発明の実施の形態】本発明の実施の形態を添付図に基
づいて以下に説明する。なお、図面は符号の向きに見る
ものとする。図１は本発明に係る自動二輪車の後輪を示
す斜視図である。自動二輪車の後輪ユニット１は、図示
しないリヤアクスルに取り付けたボス付きドラム２と、
このボス付きドラム２に取付けたリヤホイール１５と、
このリヤホイール１５に取付けたリヤタイヤ１７と、ボ
ス付きドラム２の内部に配置したブレーキシューアッセ
ンブリ２０とからなる。なお、ボス付きドラム２につい
ては図２でさらに詳しく説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of the reference numerals. FIG. 1 is a perspective view showing a rear wheel of a motorcycle according to the present invention. The rear wheel unit 1 of the motorcycle includes a drum 2 with a boss attached to a rear axle (not shown),
A rear wheel 15 attached to the bossed drum 2,
A rear tire 17 attached to the rear wheel 15 and a brake shoe assembly 20 arranged inside the drum 2 with a boss. The bossed drum 2 will be described in more detail with reference to FIG.
【００１１】ブレーキシューアッセンブリ２０は、ピン
２１を支点にして開閉する一対のブレーキシュー２２，
２２と、これらのブレーキシュー２２，２２を閉じるた
めの引張ばね２４，２４と、これらの引張ばね２４，２
４のばね力に対向してブレーキシュー２２，２２を開く
カム２６と、このカム２６を操作するアーム２８とから
なる。The brake shoe assembly 20 includes a pair of brake shoes 22, which are opened and closed with a pin 21 as a fulcrum.
22, tension springs 24, 24 for closing the brake shoes 22, 22, and tension springs 24, 2
The cam 26 opens the brake shoes 22 and 22 in opposition to the spring force of No. 4, and the arm 28 that operates the cam 26.
【００１２】図２は本発明に係るボス付きドラムの断面
図である。ボス付きドラム２は、中央の小径筒状ボス４
と、このボス４を同心的に囲う大径筒状ドラム８と、こ
れらボス４とドラム８の一端同士をつなぐ底部１２とか
らなる。ボス４は、内周にリヤアクスル（図示しない）
に噛み合うスプライン歯６を設けた部材である。ドラム
８は、内周にブレーキシュー２２，２２（図１参照）を
押し付ける部材であって、開口側に拡径部１０を設けた
部材である。FIG. 2 is a sectional view of the drum with a boss according to the present invention. The boss drum 2 has a small-diameter cylindrical boss 4 in the center.
And a large-diameter cylindrical drum 8 concentrically surrounding the boss 4, and a bottom portion 12 connecting one ends of the boss 4 and the drum 8. The boss 4 has a rear axle (not shown) on the inner circumference.
It is a member provided with spline teeth 6 that mesh with. The drum 8 is a member that presses the brake shoes 22, 22 (see FIG. 1) on the inner periphery thereof, and is a member that has the enlarged diameter portion 10 on the opening side.
【００１３】以上に述べた本発明に係るボス付きドラム
の製造方法を次に説明する。図３は本発明に係るボス付
きドラムの製造方法を説明するフロー図であり、ＳＴ×
×はステップ番号を示す。
ＳＴ０１；予め中央に小径の孔を開けた平板（ワーク）
を、図示しないトランスファー型の金型にセットして、
ワークを絞り加工することにより有底筒状体を絞り成形
する。
ＳＴ０２；ワークを逆絞り用の金型にセットして、有底
筒状体の中央部を逆絞りすることにより開口側に向って
小径筒部を成形する。The method of manufacturing the boss drum according to the present invention described above will be described below. FIG. 3 is a flow chart illustrating a method for manufacturing a boss drum according to the present invention, in which ST ×
X indicates a step number. ST01: Flat plate (work) with a small diameter hole in the center in advance
To the transfer mold (not shown),
The bottomed tubular body is drawn by drawing the work. ST02: The work is set in a reverse drawing die, and the central portion of the bottomed tubular body is reverse drawn to form a small-diameter tubular portion toward the opening side.
【００１４】ＳＴ０３；ワークを増肉用の金型にセット
して、小径筒部を縮径し且つ軸方向に潰して増肉してボ
スにする。
ＳＴ０４；ワークをスプライン歯を成形用の金型にセッ
トして、ボスの内周にスプライン歯を成形すると同時
に、大径筒状体の開口端部を仕上げてドラムにする。
上記ＳＴ０１〜ＳＴ０４の工程については図４〜図１３
でさらに詳しく説明する。ST03: The work is set in a metal mold for increasing the thickness, and the small-diameter cylindrical portion is reduced in diameter and axially crushed to increase the thickness to form a boss. ST04: The work is set in a mold for forming spline teeth, and the spline teeth are formed on the inner circumference of the boss, and at the same time, the open end of the large-diameter cylindrical body is finished into a drum. 4 to 13 for the steps of ST01 to ST04.
Will be explained in more detail.
【００１５】ＳＴ０１の有底筒状体を成形する工程につ
いて説明する。図４（ａ），（ｂ）は本発明に係るボス
付きドラムの製造方法の第１説明図である。（ａ）にお
いて、予め中央に孔３０ａを開けた円形の平板（ワー
ク）３０を、トランスファー型の第１金型にセットし、
ワーク３０の外周端３０ｂを第１金型のダイとホルダと
で挟み込む。（ｂ）において、第１金型のパンチ３１を
矢印ａの如く押し付けてワーク３０を絞って有底筒状体
３２にする。The step of forming the bottomed cylindrical body of ST01 will be described. 4 (a) and 4 (b) are first explanatory views of the method for manufacturing a boss drum according to the present invention. In (a), a circular flat plate (workpiece) 30 having a hole 30a formed in the center in advance is set in a first die of a transfer die,
The outer peripheral end 30b of the work 30 is sandwiched between the die of the first mold and the holder. In (b), the punch 31 of the first die is pressed as indicated by the arrow a to squeeze the work 30 to form the bottomed cylindrical body 32.
【００１６】ＳＴ０２の小径筒部を成形する工程につい
て説明する。図５（ａ）〜（ｃ）は本発明に係るボス付
きドラムの製造方法の第２説明図である。（ａ）におい
て、ワーク３０をトランスファー型の第２金型にセット
して外周端３０ｂを挟み込む。次に、第２金型のパンチ
３４を矢印ｂの如く押し付けて有底筒状体の中央を逆絞
り加工することにより有底筒状体の開口３２ａ側に向っ
て小径筒部３５を成形する。The step of molding the small diameter cylindrical portion of ST02 will be described. 5A to 5C are second explanatory views of the method for manufacturing a boss drum according to the present invention. In (a), the work 30 is set in the second mold of the transfer type and the outer peripheral end 30b is sandwiched. Next, the punch 34 of the second mold is pressed as shown by the arrow b to reverse-draw the center of the bottomed tubular body to form the small diameter tubular portion 35 toward the opening 32a side of the bottomed tubular body. .
【００１７】（ｂ）において、ワーク３０をトランスフ
ァー型の第３金型にセットして外周端３０ｂを挟み込
む。第３金型のパンチ３６を矢印ｃの如く押し付けて逆
絞り加工する。第３金型のパンチ３６は第２金型のパン
チ３４より小径なので、小径筒部３５の直径ｄを縮径し
ながら絞り深さｈを深くできる。In (b), the work 30 is set in the third mold of the transfer type and the outer peripheral end 30b is sandwiched. Reverse punching is performed by pressing the punch 36 of the third die as indicated by arrow c. Since the punch 36 of the third die has a smaller diameter than the punch 34 of the second die, the drawing depth h can be increased while reducing the diameter d of the small diameter tubular portion 35.
【００１８】（ｃ）において、ワーク３０をトランスフ
ァー型の第４金型にセットして外周端３０ｂを挟み込
む。第４金型のパンチ３８を矢印ｄの如く押し付けて逆
絞り加工する。第４金型のパンチ３８は第３金型のパン
チ３６より小径なので、小径筒部３５の直径ｄをさらに
縮径しながら絞り深さｈをさらに深くできる。小径筒部
３５の先端部３５ａは逆絞り加工により、その他の小径
筒部３５と比較して肉厚が小さくなる。In (c), the work 30 is set on the fourth die of the transfer type and the outer peripheral end 30b is sandwiched. The punch 38 of the fourth die is pressed as shown by arrow d to perform reverse drawing. Since the punch 38 of the fourth die has a smaller diameter than the punch 36 of the third die, the drawing depth h can be further increased while further reducing the diameter d of the small diameter tubular portion 35. The tip portion 35a of the small-diameter tubular portion 35 has a smaller wall thickness than the other small-diameter tubular portions 35 due to the reverse drawing process.
【００１９】ＳＴ０３の増肉工程について説明する。図
６（ａ），（ｂ）は本発明に係るボス付きドラムの製造
方法の第３説明図であり、第１増肉工程を示す。（ａ）
において、逆絞り加工したワーク３０をトランスファー
型の第５金型のダイ４０に載せて、上型４１を矢印ｅの
如く下降する。（ｂ）において、上型４１のホルダ４１
ａとダイ４０とで、ワーク３０の外周部３０ｂを挟み込
み、同時に上型４１のパンチ４１ｂで小径筒部３５の先
端を押圧する。The thickening step of ST03 will be described. FIGS. 6A and 6B are third explanatory views of the method for manufacturing a boss drum according to the present invention, and show the first thickness increasing step. (A)
At, the work 30 subjected to reverse drawing is placed on the die 40 of the transfer type fifth die, and the upper die 41 is lowered as indicated by arrow e. In (b), the holder 41 of the upper die 41
The outer peripheral portion 30b of the work 30 is sandwiched between a and the die 40, and at the same time, the punch 41b of the upper die 41 presses the tip of the small diameter tubular portion 35.
【００２０】図７（ａ），（ｂ）は本発明に係るボス付
きドラムの製造方法の第４説明図であり、第１増肉工程
を示す。（ａ）において、第５金型のパンチリング４１
ｃを矢印ｆの如く下降することにより、小径筒部３５を
縮径する。（ｂ）は、小径筒部３５の外周にパンチリン
グ４１ｃによる絞り力Ｆが作用することにより、小径筒
部３５が縮径してＴ１からＴ２に増肉した状態を示す。FIGS. 7 (a) and 7 (b) are the fourth explanatory views of the method for manufacturing a boss drum according to the present invention, and show the first thickness increasing step. In (a), punch ring 41 of the fifth die
The diameter of the small-diameter cylindrical portion 35 is reduced by lowering c as indicated by the arrow f. (B) shows a state in which the small-diameter tubular portion 35 is reduced in diameter and increased in thickness from T1 to T2 by the drawing force F exerted by the punch ring 41c on the outer periphery of the small-diameter tubular portion 35.
【００２１】図８（ａ），（ｂ）は本発明に係るボス付
きドラムの製造方法の第５説明図であり、第１増肉工程
を示す。（ａ）において、パンチ４１ｂ及びパンチリン
グ４１ｃを同時に矢印ｇの如くＬ１下降させる。FIGS. 8 (a) and 8 (b) are fifth explanatory views of the method for producing a boss drum according to the present invention, showing the first thickness increasing step. In (a), the punch 41b and the punch ring 41c are simultaneously lowered by L1 as indicated by an arrow g.
【００２２】（ｂ）において、パンチ４１ｂ及びパンチ
リング４１ｃを所定位置まで下降することにより、小径
筒部３５を軸方向に潰して（ａ）に示したＴ２からＴ３
まで増肉する。これで第１増肉工程が完了する。このと
き、小径筒部３５の肉厚の小さい先端部３５ａを内側に
折曲げて、この先端部３５ａをパンチ４１ｂとノックア
ウト４３とで挟み込みながら小径筒部３５を軸方向に潰
すので、肉厚の小さい先端部３５ａを増肉する必要がな
い。このため、小径筒部３５のなかの比較的肉厚の大き
な部分のみを増肉すればよいので、小径筒部３５を効率
よく均一に増肉することができる。第１増肉工程の完了
後、上型４１を矢印ｈの如く上昇させて、次いで、ノッ
クアウトリング４４を矢印ｉの如く上昇してワーク３０
を第５金型から取り出す。In (b), the punch 41b and the punch ring 41c are lowered to a predetermined position to crush the small-diameter cylindrical portion 35 in the axial direction, and T2 to T3 shown in (a).
Up to. This completes the first thickness increasing step. At this time, the small-diameter tubular portion 35 is bent inwardly, and the small-diameter tubular portion 35 is crushed in the axial direction while sandwiching the tip portion 35a between the punch 41b and the knockout 43. It is not necessary to increase the thickness of the small tip portion 35a. For this reason, since it is necessary to increase the thickness of only the relatively thick portion of the small-diameter tubular portion 35, the small-diameter tubular portion 35 can be efficiently and uniformly thickened. After the completion of the first thickness increasing step, the upper die 41 is lifted as shown by an arrow h, and then the knockout ring 44 is lifted as shown by an arrow i.
Is taken out from the fifth mold.
【００２３】図９（ａ），（ｂ）は本発明に係るボス付
きドラムの製造方法の第６説明図であり、第２増肉工程
を示す。（ａ）は、第５金型から取り出したワーク３０
を示す。（ｂ）において、ワーク３０をトランスファー
型の第６金型のダイ４６に載せて、上型４７を矢印ｊの
如く下降させる。FIGS. 9 (a) and 9 (b) are sixth explanatory views of the method for manufacturing a boss drum according to the present invention, and show the second thickness increasing step. (A) is the work 30 taken out from the fifth mold.
Indicates. In (b), the work 30 is placed on the die 46 of the transfer-type sixth die, and the upper die 47 is lowered as indicated by an arrow j.
【００２４】図１０（ａ），（ｂ）は本発明に係るボス
付きドラムの製造方法の第７説明図であり、第２増肉工
程を示す。（ａ）において、ダイ４６と上型４７のホル
ダ４７ａとでワーク３０の外周部３０ｂを挟み込み、同
時に上型４７のパンチ４７ｂで小径筒部３５の先端部３
５ａを押圧する。FIGS. 10 (a) and 10 (b) are the seventh explanatory views of the method for manufacturing a boss drum according to the present invention, and show the second thickness increasing step. In (a), the outer peripheral portion 30b of the work 30 is sandwiched between the die 46 and the holder 47a of the upper die 47, and at the same time, the punch 47b of the upper die 47 holds the tip portion 3 of the small diameter tubular portion 35.
Press 5a.
【００２５】次に、パンチリング４７ｃを矢印ｋの如く
下降してパンチリング４７ｃで小径筒部３５を縮径す
る。このとき、図７（ｂ）と同様に、小径筒部３５の外
周にパンチリング４７ｃによる絞り力が作用するので、
小径筒部３５が縮径して増肉する。（ｂ）において、パ
ンチ４７ｂ及びパンチリング４７ｃを同時に矢印ｍ，ｎ
の如くＬ２下降させる。Next, the punch ring 47c is lowered as indicated by an arrow k to reduce the diameter of the small diameter cylindrical portion 35 by the punch ring 47c. At this time, as in the case of FIG. 7B, since the drawing force by the punch ring 47c acts on the outer circumference of the small diameter cylindrical portion 35,
The small-diameter tubular portion 35 is reduced in diameter to increase the wall thickness. In (b), the punch 47b and the punch ring 47c are simultaneously moved to the arrows m and n.
L2 is lowered as shown.
【００２６】図１１（ａ）〜（ｃ）は本発明に係るボス
付きドラムの製造方法の第８説明図であり、第２増肉工
程を示す。（ａ）において、パンチ４７ｂ及びパンチリ
ング４７ｃを所定位置まで下降することにより、小径筒
部３５を軸方向に潰してＴ４まで増肉する。これで第２
増肉工程が完了する。FIGS. 11 (a) to 11 (c) are the eighth explanatory views of the method for manufacturing a boss drum according to the present invention, and show the second thickness increasing step. In (a), by lowering the punch 47b and the punch ring 47c to a predetermined position, the small diameter cylindrical portion 35 is crushed in the axial direction to increase the thickness to T4. This is the second
The thickening process is completed.
【００２７】第２増肉工程のときも第１増肉工程と同様
に、先端部３５ａをパンチ４７ｂとノックアウト４９と
で挟み込みながら小径筒部３５を軸方向に潰すので先端
部３５ａを増肉する必要がない。このため、小径筒部３
５のなかの比較的肉厚の大きな部分のみを増肉すればよ
いので、小径筒部３５を効率よく均一に増肉できる。第
２増肉工程の完了後、上型４７を矢印ｐの如く上昇し、
次いで、ノックアウトリング５０を矢印ｑの如く上昇さ
せてワーク３０を第６金型から取り出す。Also in the second thickness increasing step, as in the first thickness increasing step, the tip portion 35a is crushed in the axial direction while the tip portion 35a is sandwiched between the punch 47b and the knockout 49, so that the tip portion 35a is increased in thickness. No need. Therefore, the small-diameter cylindrical portion 3
Since it suffices to increase the thickness of only the relatively thick portion of 5, the small-diameter cylindrical portion 35 can be efficiently and uniformly increased in thickness. After the completion of the second thickness increasing step, the upper die 47 is raised as indicated by the arrow p,
Next, the knockout ring 50 is raised as indicated by the arrow q, and the work 30 is taken out from the sixth die.
【００２８】（ｂ）は、第６金型から取り出したワーク
３０を示す。このワーク３０をトランスファー型の第７
金型にセットして、第２増肉工程と同様に小径筒部３５
を第３増肉工程で増肉する。(B) shows the work 30 taken out from the sixth mold. This work 30 is the transfer type seventh
Set in the mold, and use the small-diameter cylindrical part 35 as in the second thickness increasing step.
Is increased in the third thickness increasing step.
【００２９】（ｃ）は、第３増肉工程で小径筒部をＴ５
まで増肉してボス４（図２も参照）にしたワーク３０を
示す。第３増肉工程のときも、第１増肉工程や第２増肉
工程と同様に、先端部３５ａをパンチとノックアウトと
で挟み込みながら小径筒部３５を軸方向に潰すので先端
部３５ａを増肉する必要がない。このため、小径筒部３
５のなかの比較的肉厚の大きな部分のみを増肉すればよ
いので、ボス４を効率よく均一に増肉することができ
る。In (c), the small-diameter cylindrical portion is T5 in the third thickening step.
A work 30 having a boss 4 (see also FIG. 2) thickened up to the above is shown. Also in the third thickness increasing step, as in the first thickness increasing step and the second thickness increasing step, since the small diameter cylindrical portion 35 is crushed in the axial direction while sandwiching the tip end portion 35a with the punch and the knockout, the tip end portion 35a is increased. No need to flesh. Therefore, the small-diameter cylindrical portion 3
Since it suffices to increase the thickness of only the relatively thick portion of 5, the boss 4 can be efficiently and uniformly increased in thickness.
【００３０】ＳＴ０４のスプライン歯成形工程について
説明する。図１２（ａ），（ｂ）は本発明に係るボス付
きドラムの製造方法の第９説明図であり、スプライン加
工工程を示す。（ａ）において、ワーク３０をトランス
ファー型の第８金型のノックアウトリング５２に載せ
て、上型５３を矢印ｒの如く下降する。The spline tooth forming step of ST04 will be described. 12 (a) and 12 (b) are ninth explanatory views of the method for manufacturing a boss drum according to the present invention, showing a spline processing step. In (a), the work 30 is placed on the knockout ring 52 of the transfer-type eighth die, and the upper die 53 is lowered as indicated by an arrow r.
【００３１】なお、ワーク３０のボス４を第３増肉より
さらに増肉する必要がある場合には、パンチリング５３
ｂの内径をボス４の外径より小さく設定することによ
り、矢印ｒの如く下降したパンチリング５３ｂでボス４
を縮径することも可能である。これによると、新たに増
肉工程を追加しないで、スプライン歯成形工程において
ボス４を増肉できるというメリットがある。If the boss 4 of the work 30 needs to be thicker than the third thickening, the punch ring 53 is used.
By setting the inner diameter of b to be smaller than the outer diameter of the boss 4, the punch ring 53b lowered as indicated by the arrow r causes the boss 4 to move.
It is also possible to reduce the diameter. According to this, there is an advantage that the boss 4 can be thickened in the spline tooth forming step without newly adding a thickening step.
【００３２】（ｂ）において、上型５３のパンチ５３ａ
及びパンチリング５３ｂをワーク３０に押し付ける。こ
のとき、ボス４は、外周４ａがパンチリング５３ｂの内
周に接触し、基端４ｂがノックアウトリング５２の上端
に接触し、先端４ｃがパンチ５３ａの下端に接触する。
また、パンチ５３ａの下端には穴５４を形成し、パンチ
５３ａの肉厚Ｔ６をボス４の肉厚Ｔ５より小さく設定す
る。In (b), the punch 53a of the upper die 53
And the punch ring 53b is pressed against the work 30. At this time, the outer periphery 4a of the boss 4 contacts the inner periphery of the punch ring 53b, the base end 4b thereof contacts the upper end of the knockout ring 52, and the tip 4c thereof contacts the lower end of the punch 53a.
Further, a hole 54 is formed at the lower end of the punch 53a, and the thickness T6 of the punch 53a is set smaller than the thickness T5 of the boss 4.
【００３３】この状態で、上型５３のパンチ５３ａ及び
パンチリング５３ｂを矢印ｓの如く下降することによ
り、パンチ５３ａ及びパンチリング５３ｂの押下力でワ
ーク３０及びノックアウトリング５２を同時に下降させ
る。In this state, the punch 53a and punch ring 53b of the upper die 53 are lowered as indicated by the arrow s, so that the work 30 and the knockout ring 52 are simultaneously lowered by the pressing force of the punch 53a and punch ring 53b.
【００３４】図１３（ａ），（ｂ）は本発明に係るボス
付きドラムの製造方法の第１０説明図であり、スプライ
ン加工工程を示す。（ａ）において、ボス４を歯形パン
チとしてのスプライン歯形パンチ５６に嵌め込むことに
より、ボス４の内周にスプライン歯６（図２参照）を成
形すると同時に、ワーク３０の開口端部としての外周部
３０ｂ（図１２（ｂ）参照）をダイ５９とパンチリング
５３ｂとでしごいて有底筒状体３２の開口側に拡径部１
０（図２も参照）を成形することによりドラム８（図２
参照）にする。これでボス付きドラム２の成形工程が完
了する。FIGS. 13 (a) and 13 (b) are a tenth explanatory view of the method for manufacturing a boss drum according to the present invention, showing a spline processing step. In (a), by fitting the boss 4 into the spline tooth profile punch 56 as a tooth profile punch, the spline tooth 6 (see FIG. 2) is formed on the inner periphery of the boss 4 and, at the same time, the outer periphery as the opening end of the work 30. The portion 30b (see FIG. 12 (b)) is squeezed by the die 59 and the punch ring 53b, and the enlarged diameter portion 1 is provided on the opening side of the bottomed tubular body 32.
0 (see also FIG. 2) to form a drum 8 (see FIG. 2).
See). This completes the molding process for the bossed drum 2.
【００３５】ところで、スプライン歯６を形成する際
に、ボス４は、外周４ａがパンチリング５３ｂの内周に
接触し、基端４ｂがノックアウトリング５２の上端に接
触し、先端４ｃがパンチ５３ａの下端に接触している。
このため、ボス４の内径より最外周が大径のスプライン
歯形パンチ５６にボス４を嵌め込んでも、ボス４の内周
が外側に逃げる虞れはないので、ボス４の内周にスプラ
イン歯６を精度よく加工することができる。When forming the spline teeth 6, the outer periphery 4a of the boss 4 contacts the inner periphery of the punch ring 53b, the base end 4b thereof contacts the upper end of the knockout ring 52, and the tip 4c of the punch 53a. It touches the bottom edge.
Therefore, even if the boss 4 is fitted into the spline tooth punch 56 whose outermost circumference is larger than the inner diameter of the boss 4, there is no risk of the inner circumference of the boss 4 escaping to the outside. Can be processed with high precision.
【００３６】また、パンチ５３ａの肉厚Ｔ６をボス４の
肉厚Ｔ５より小さく設定したので、スプライン歯形パン
チ５６の先端がパンチ５３ａの穴５４に入り込んでも、
スプライン歯形パンチ５６がパンチ５３ａに干渉する虞
れはない。さらに、パンチ５３ａの肉厚Ｔ６をボス４の
肉厚Ｔ５より小さく設定したので、ボス４の内周にスプ
ライン歯６（図２参照）を成形する際に、ボス４の先端
４ｃに余肉（例えば、バリ）が発生しても、この余肉を
パンチ５３ａの穴５４に逃がすことができる。Further, since the thickness T6 of the punch 53a is set smaller than the thickness T5 of the boss 4, even if the tip of the spline tooth-shaped punch 56 enters the hole 54 of the punch 53a,
There is no risk that the spline tooth-shaped punch 56 interferes with the punch 53a. Further, since the thickness T6 of the punch 53a is set to be smaller than the thickness T5 of the boss 4, when the spline teeth 6 (see FIG. 2) are formed on the inner circumference of the boss 4, the surplus of the tip 4c of the boss 4 ( For example, even if burrs are generated, this surplus can be released to the hole 54 of the punch 53a.
【００３７】（ｂ）は、第８金型から取り出したワーク
３０を示す。このワーク３０の中央に成形したボス４の
先端４ｃを機械加工することにより、図２に示すボス付
きドラム２になる。(B) shows the work 30 taken out from the eighth die. By machining the tip 4c of the boss 4 formed in the center of the work 30, the bossed drum 2 shown in FIG. 2 is obtained.
【００３８】前記実施の形態では、ボス４の内周にスプ
ライン歯を成形する工程と、有底筒状体３２の開口部に
拡径部１０を成形する工程とを同時に実施する方法につ
いて説明したが、それぞれの工程を別々に実施しても前
記実施の形態と同様の効果を得ることができる。In the above-described embodiment, a method of simultaneously performing the step of forming the spline teeth on the inner circumference of the boss 4 and the step of forming the expanded diameter portion 10 in the opening of the bottomed tubular body 32 has been described. However, even if each of the steps is carried out separately, the same effect as the above-mentioned embodiment can be obtained.
【００３９】前記実施の形態ではトランスファー型を使
用してボス付きドラムを成形する方法について説明した
が、その他の方法として、例えば順送り型を使用してボ
ス付きドラムを成形することも可能である。In the above embodiment, the method of molding the boss-equipped drum using the transfer mold has been described. However, as another method, it is possible to mold the boss-equipped drum using, for example, a progressive feed mold.
【００４０】[0040]
【発明の効果】本発明は上記構成により次の効果を発揮
する。請求項１は、ボスの外周、基端及び先端の３箇所
を拘束しつつ、ボスの内周を歯形パンチでしごいて、ス
プライン歯を成形する。従って、ボス孔より大径の歯形
パンチをボス孔に押し込んでも、この歯形パンチに押さ
れてボスが外側に膨らむ虞れはない。このため、ボスの
内周に歯形パンチでスプライン歯を精度よく成形するこ
とができるので品質が向上する。また、金型でボスとド
ラムとを一体成形した後、歯形パンチでボスの内周にス
プライン歯を成形することが可能なので、一連の生産ラ
インでボス付きドラムを製造することができる。この結
果、生産性が向上してコストを下げることができる。The present invention has the following effects due to the above configuration. According to the first aspect of the present invention, the spline teeth are formed by squeezing the inner circumference of the boss with a tooth-shaped punch while restraining the outer circumference, the base end and the tip of the boss. Therefore, even if a tooth-shaped punch having a diameter larger than that of the boss hole is pushed into the boss hole, there is no possibility that the tooth-shaped punch is pushed by the tooth-shaped punch and the boss bulges outward. For this reason, the spline teeth can be accurately formed on the inner circumference of the boss by the tooth-shaped punch, so that the quality is improved. Further, since the spline teeth can be formed on the inner circumference of the boss with the tooth-shaped punch after the boss and the drum are integrally formed with the mold, the boss-equipped drum can be manufactured on a series of production lines. As a result, productivity can be improved and cost can be reduced.
【００４１】請求項２は、スプライン歯の成形工程とド
ラム化工程とを同時に実施する。工程数が少なくなった
ので生産サイクルタイムを短縮することができる。従っ
て、生産性の向上と、生産コストの削減とが図れる。According to a second aspect, the spline tooth forming step and the drum forming step are carried out at the same time. Since the number of steps is reduced, the production cycle time can be shortened. Therefore, the productivity can be improved and the production cost can be reduced.
【図１】本発明に係る自動二輪車の後輪を示す斜視図FIG. 1 is a perspective view showing a rear wheel of a motorcycle according to the present invention.
【図２】本発明に係るボス付きドラムの断面図FIG. 2 is a sectional view of a bossed drum according to the present invention.
【図３】本発明に係るボス付きドラムの製造方法を説明
するフロー図FIG. 3 is a flowchart illustrating a method for manufacturing a boss drum according to the present invention.
【図４】本発明に係るボス付きドラムの製造方法の第１
説明図FIG. 4 is a first method of manufacturing a bossed drum according to the present invention.
Illustration
【図５】本発明に係るボス付きドラムの製造方法の第２
説明図FIG. 5 is a second method of manufacturing a boss drum according to the present invention.
Illustration
【図６】本発明に係るボス付きドラムの製造方法の第３
説明図FIG. 6 is a third method of manufacturing a boss drum according to the present invention.
Illustration
【図７】本発明に係るボス付きドラムの製造方法の第４
説明図FIG. 7 is a fourth method of manufacturing a boss drum according to the present invention.
Illustration
【図８】本発明に係るボス付きドラムの製造方法の第５
説明図FIG. 8 is a fifth method of manufacturing a boss drum according to the present invention.
Illustration
【図９】本発明に係るボス付きドラムの製造方法の第６
説明図FIG. 9 is a sixth method of manufacturing a boss drum according to the present invention.
Illustration
【図１０】本発明に係るボス付きドラムの製造方法の第
７説明図FIG. 10 is a seventh explanatory view of the method for manufacturing the boss drum according to the present invention.
【図１１】本発明に係るボス付きドラムの製造方法の第
８説明図FIG. 11 is an eighth explanatory view of the method for manufacturing the boss drum according to the present invention.
【図１２】本発明に係るボス付きドラムの製造方法の第
９説明図FIG. 12 is a ninth explanatory view of the method for manufacturing the boss drum according to the present invention.
【図１３】本発明に係るボス付きドラムの製造方法の第
１０説明図FIG. 13 is a tenth explanatory view of a method for manufacturing a boss drum according to the present invention.
２…ボス付きドラム、４…小径筒状ボス、４ａ…外周、
４ｂ…基端、４ｃ…先端、６…スプライン歯、８…大径
筒状ドラム、１０…拡径部、１２…底部、３０…平板、
３０ａ…孔、３０ｂ…開口端部（外周端）、３２…有底
筒状体、３２ａ…開口、３５…小径筒部、５６…（歯形
パンチ）スプライン歯形パンチ。2 ... drum with boss, 4 ... small diameter cylindrical boss, 4a ... outer circumference,
4b ... Proximal end, 4c ... Tip, 6 ... Spline tooth, 8 ... Large diameter cylindrical drum, 10 ... Expanded part, 12 ... Bottom part, 30 ... Flat plate,
30a ... Hole, 30b ... Open end (outer peripheral end), 32 ... Bottomed tubular body, 32a ... Opening, 35 ... Small diameter tubular section, 56 ... (Tooth profile punch) Spline tooth profile punch.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｆ１６Ｄ 1/06 Ｆ１６Ｄ 1/06 Ｅ (56)参考文献 特開 平３−180219（ＪＰ，Ａ) 特開 昭56−124732（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B21D 53/26 B21D 22/26 B21D 22/30 B21D 53/34 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 7 Identification symbol FI F16D 1/06 F16D 1/06 E (56) Reference JP-A-3-180219 (JP, A) JP-A-56-124732 ( (58) Fields investigated (Int.Cl. 7 , DB name) B21D 53/26 B21D 22/26 B21D 22/30 B21D 53/34
Claims (2)
的に囲う大径筒状ドラムと、これらボスとドラムの一端
同士をつなぐ底部とからなるボス付きドラムの製造方法
であって、 予め中央に孔を開けた平板を絞って有底筒状体を成形す
る工程と、この有底筒状体の中央部を逆絞りして開口側
に向って小径筒部を成形する工程と、この小径筒部を縮
径し且つ軸方向に潰すことにより増肉してボスにする工
程と、このボスの外周をパンチリングの内周に接触さ
せ、ボスの基端をノックアウトリングの上端に接触さ
せ、かつボスの先端をパンチの下端に接触させることに
より、ボスの外周、基端及び先端の３箇所を拘束し、こ
の状態でボスの内周を歯型パンチでしごくことにより内
周にスプライン歯を成形する工程とからなることを特徴
としたボス付きドラムの製造方法。1. A method of manufacturing a boss-equipped drum comprising a central small-diameter cylindrical boss, a large-diameter cylindrical drum concentrically surrounding the boss, and a bottom portion connecting the boss and one end of the drum. A step of forming a bottomed tubular body by squeezing a flat plate having a hole in the center in advance, and a step of forming a small-diameter tubular portion toward the opening side by reverse-drawing the central part of the bottomed tubular body, The step of reducing the diameter of this small-diameter cylindrical portion and crushing it in the axial direction to increase the thickness to form a boss, and the outer circumference of this boss contacting the inner circumference of the punch ring.
The boss base end against the knockout ring top end.
And to bring the tip of the boss into contact with the bottom of the punch.
The boss has a step of forming spline teeth on the inner circumference by restraining the outer circumference , the base end and the tip of the boss at three points and squeezing the inner circumference of the boss with a tooth punch in this state. Of manufacturing a drum with a brush.
的に囲う大径筒状ドラムと、これらボスとドラムの一端
同士をつなぐ底部とからなるボス付きドラムの製造方法
であって、 予め中央に孔を開けた平板を絞って有底筒状体を成形す
る工程と、この有底筒状体の中央部を逆絞りして開口側
に向って小径筒部を成形する工程と、この小径筒部を縮
径し且つ軸方向に潰すことにより増肉してボスにする工
程と、このボスの外周、基端及び先端の３箇所を拘束
し、この状態でボスの内周を歯型パンチでしごくことに
より内周に スプライン歯を成形すると同時に、前記有底
筒状体の開口端部を仕上げてドラムにする工程とからな
ることを特徴としたボス付きドラムの製造方法。2. A central small-diameter cylindrical boss and this boss are concentric
Large-diameter cylindrical drum that surrounds it, and one end of these boss and drum
Method for manufacturing a bossed drum consisting of a bottom portion that connects together
A is, to mold the bottomed tubular body squeezing plates opened previously center hole
Process, and the central part of this bottomed cylindrical body is reversely squeezed to the opening side.
And the process of forming the small diameter cylinder toward
By increasing the diameter and crushing in the axial direction to increase the wall thickness to form a boss
And restrain the three points of the boss, the outer circumference, the base end and the tip.
Then, in this state you can squeeze the inner circumference of the boss with a tooth type punch
Simultaneously molding the spline teeth on the inner periphery more, I and a step of the drum to finish the open end of the bottomed cylindrical body
Method for producing a volume scan with a drum which was characterized by that.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23147397A JP3364123B2 (en) | 1997-08-27 | 1997-08-27 | Manufacturing method of bossed drum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23147397A JP3364123B2 (en) | 1997-08-27 | 1997-08-27 | Manufacturing method of bossed drum |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1157913A JPH1157913A (en) | 1999-03-02 |
| JP3364123B2 true JP3364123B2 (en) | 2003-01-08 |
Family
ID=16924055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23147397A Expired - Fee Related JP3364123B2 (en) | 1997-08-27 | 1997-08-27 | Manufacturing method of bossed drum |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3364123B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06345646A (en) * | 1993-06-08 | 1994-12-20 | Fujisawa Pharmaceut Co Ltd | Lotion preparation |
| JP3901424B2 (en) * | 2000-03-30 | 2007-04-04 | 本田技研工業株式会社 | Brake drum for vehicle |
| JP3968785B2 (en) | 2004-05-18 | 2007-08-29 | セイコーエプソン株式会社 | Drive regeneration control system |
| CN100521463C (en) | 2004-05-18 | 2009-07-29 | 精工爱普生株式会社 | Motor |
| JP5936417B2 (en) * | 2012-03-30 | 2016-06-22 | トピー工業株式会社 | Method for forming wheel disc for vehicle and method for manufacturing wheel for vehicle |
-
1997
- 1997-08-27 JP JP23147397A patent/JP3364123B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1157913A (en) | 1999-03-02 |
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