JP2001311436A - Tubular body, hub for clutch apparatus, and forming method - Google Patents

Tubular body, hub for clutch apparatus, and forming method

Info

Publication number
JP2001311436A
JP2001311436A JP2000129090A JP2000129090A JP2001311436A JP 2001311436 A JP2001311436 A JP 2001311436A JP 2000129090 A JP2000129090 A JP 2000129090A JP 2000129090 A JP2000129090 A JP 2000129090A JP 2001311436 A JP2001311436 A JP 2001311436A
Authority
JP
Japan
Prior art keywords
hub
peripheral surface
axial direction
cylindrical
center
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
Application number
JP2000129090A
Other languages
Japanese (ja)
Inventor
Hiroshi Wada
啓 和田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Somic Ishikawa KK
Original Assignee
Somic Ishikawa KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Somic Ishikawa KK filed Critical Somic Ishikawa KK
Priority to JP2000129090A priority Critical patent/JP2001311436A/en
Publication of JP2001311436A publication Critical patent/JP2001311436A/en
Pending legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To provide a forming method of a hub for a clutch apparatus preventing a breakage. SOLUTION: A cylindrical raw material is supported by pressing on both sides approximately at center points thereof in axial direction, and a first intermediary formed body is built by fluidizing an excessive metal at periphery thereof cylindrically along the identical axis. A second intermediary formed body is built by supporting pressingly the first intermediary formed body axially at blockage section which is closing the internal circumference of the cylindrical section and by shaping hub splines 3 through extrusion forming with an excessive metal being fluidized radially outwardly. The hub 1 is formed by punching out and removing the blockage plate which is closing the internal circumference of shell plate 2 where the hub splines 3 are protruding at the outer periphery of the second intermediary formed body. Because the hub splines 3 are being bulged by fluidizing the excessive metal from the cylindrical section, metal flow lines 34 for the shell plate and for the hub spline 3 run continuously, thereby increases the strength. Even in the clutch apparatus subjected to frequent heavy load, damage by breakage of the hub spline 3 can be prevented.

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、略筒状の外周面に
突起部を突設した筒状体、略円筒状の外周面にハブスプ
ラインを突設したクラッチ装置のハブおよびその成形方
法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical body having a substantially cylindrical outer peripheral surface with a projection, a hub of a clutch device having a substantially cylindrical outer peripheral surface with a hub spline, and a molding method therefor. .

【0002】[0002]

【従来の技術】従来、外周面に突起を設けた筒状体とし
て、例えば自動車のクラッチディスク装置に用いられ、
環状のフェージングが周縁近傍の両面に取り付けられる
円板の中央に嵌合して一体的に組み付けられクラッチデ
ィスクを構成する図5に示すハブ41が知られている。
2. Description of the Related Art Conventionally, as a cylindrical body having a projection on an outer peripheral surface, it has been used, for example, in a clutch disk device of an automobile.
There is known a hub 41 shown in FIG. 5 in which an annular fading is fitted to the center of a disk attached to both surfaces near the periphery and integrally assembled to constitute a clutch disk.

【0003】この図5に示すハブ41は、円筒状の胴体部
42の外周面に、周方向に沿って壁状に突出する突起であ
るハブスプライン43を周方向に略等間隔で設けている。
そして、このハブ41は、図示しない中空円筒状の素材の
外周面を切削することにより形成される。
A hub 41 shown in FIG. 5 has a cylindrical body portion.
Hub splines 43, which are projections protruding in a wall shape along the circumferential direction, are provided on the outer peripheral surface of the circumferential direction at substantially equal intervals in the circumferential direction.
The hub 41 is formed by cutting the outer peripheral surface of a hollow cylindrical material (not shown).

【0004】[0004]

【発明が解決しようとする課題】しかしながら、上記図
5に示すような切削加工により形成したハブ41は、ハブ
スプライン43を切削加工により切り出し形成するので、
ハブスプライン43の鍛流線(flow line)44が胴体部42
の鍛流線44から断ち切られて連続しない状態となる。こ
のため、特にハブスプライン43に胴体部42の軸方向に略
沿う方向で負荷が掛かった場合、折損するおそれがある
問題がある。
However, the hub 41 formed by cutting as shown in FIG. 5 is formed by cutting out the hub spline 43 by cutting.
The flow line 44 of the hub spline 43 is the body 42
Is cut off from the wire flow line 44 of FIG. For this reason, there is a problem that the hub spline 43 may be broken particularly when a load is applied to the hub spline 43 in a direction substantially along the axial direction of the body portion 42.

【0005】本発明は、上記問題点に鑑みなされたもの
で、折損を防止した筒状体、クラッチ装置のハブおよび
その成形方法を提供することを目的とする。
The present invention has been made in view of the above problems, and has as its object to provide a tubular body, a hub of a clutch device, and a method of forming the same, which prevent breakage.

【0006】[0006]

【課題を解決するための手段】請求項1記載の筒状体
は、略筒状の胴体部と、この胴体部の内周面および外周
面のうちの少なくともいずれか一方に鍛造加工により突
出して形成された突起部とを具備したものである。
According to a first aspect of the present invention, there is provided a cylindrical body which is formed by forging a substantially cylindrical body and at least one of an inner peripheral surface and an outer peripheral surface of the body. And a formed protrusion.

【0007】そして、略筒状の胴体部の内周面および外
周面のうちの少なくともいずれか一方に鍛造加工により
突起部を突出形成することにより、胴体部と突起部との
鍛流線(flow line)が連続し、突起部の強度が増大し
て折損を防止する。
A projection is formed by forging on at least one of the inner peripheral surface and the outer peripheral surface of the substantially cylindrical body, thereby forming a forging line (flow) between the body and the projection. line) is continuous, and the strength of the protrusion is increased to prevent breakage.

【0008】請求項2記載のクラッチ装置のハブは、環
状のフェージングが周縁近傍の両面に取り付けられる円
板の中央に嵌合して一体的に組み付けられクラッチディ
スクを構成するクラッチ装置のハブであって、略円筒状
の胴体部と、この胴体部の外周面に鍛造加工により突出
して形成されたハブスプラインとを具備したものであ
る。
[0008] The hub of the clutch device according to the second aspect is a hub of the clutch device in which an annular fading is fitted integrally with a center of a disk attached to both surfaces near a peripheral edge to constitute a clutch disk. And a hub spline formed on the outer peripheral surface of the substantially cylindrical body by forging.

【0009】そして、略円筒状の胴体部の外周面に鍛造
加工によりハブスプラインを突出成形することにより、
胴体部とハブスプラインとの鍛流線(flow line)が連
続し、頻繁に大きな負荷が掛かるハブスプラインの強度
が増大して折損を防止する。
The hub spline is formed by forging on the outer peripheral surface of the substantially cylindrical body, so as to protrude.
The flow line between the body and the hub spline is continuous, and the strength of the hub spline, which is frequently subjected to a large load, increases, thereby preventing breakage.

【0010】請求項3記載のクラッチ装置のハブの成形
方法は、環状のフェージングが周縁近傍の両面に取り付
けられる円板の中央に嵌合して一体的に組み付けられク
ラッチディスクを構成するクラッチ装置のハブを成形す
る成形方法であって、略円柱状の素材の軸方向の両端面
の略中央をそれぞれ軸方向に沿って加圧して周縁を余肉
流動にて同軸上の円筒状に後方押出して円筒部およびこ
の円筒部の内周面の略中央を閉塞する閉塞部を有した第
1の中間成形体を成形し、この第1の中間成形体の閉塞
部を軸方向に沿って加圧挟持して径方向の外方に向けて
余肉流動してハブスプラインを突出成形し、胴体部、こ
の胴体部の内周面の略中央を閉塞する閉塞板および前記
胴体部の外周面に突出するハブスプラインを備えた第2
の中間成形体を成形し、この第2の中間成形体の閉塞板
を打ち抜きにより除去するものである。
According to a third aspect of the present invention, there is provided a clutch device having a clutch disk, wherein an annular fading is fitted integrally with a center of a disk attached to both surfaces near a peripheral edge to constitute a clutch disk. A molding method for molding a hub, in which substantially the center of both end faces in the axial direction of a substantially cylindrical material is pressed in the axial direction, and the peripheral edge is extruded backward into a coaxial cylindrical shape by excess flow. Forming a first intermediate molded body having a cylindrical portion and a closing portion for closing a substantially center of an inner peripheral surface of the cylindrical portion, and pressing and holding the closing portion of the first intermediate molded body along an axial direction. The excess spout flows radially outward to form the hub spline so as to protrude and protrude into the body, a closing plate that closes substantially the center of the inner peripheral surface of the body, and the outer peripheral surface of the body. 2nd with hub spline
Is formed, and the closing plate of the second intermediate formed body is removed by punching.

【0011】そして、略円柱状の素材の軸方向の両端面
の略中央をそれぞれ軸方向に沿って加圧して周縁を余肉
流動にて同軸上の円筒状に後方押出し、円筒部の内周面
の略中央が閉塞部にて閉塞された第1の中間成形体を成
形し、この第1の中間成形体の閉塞部を軸方向に沿って
加圧挟持して径方向の外方に向けて余肉流動させてハブ
スプラインを突出成形して第2の中間成形体を成形し、
この第2の中間形成体の胴体部の略中央を閉塞する閉塞
板を打ち抜きにより除去してクラッチ装置のハブを成形
するので、鍛造成形のみで円筒状の胴体部の外周面に鍛
流線(flow line)が連続し高強度のハブスプラインが
成形され、頻繁に大きな負荷が掛かるハブスプラインが
折損しないハブが容易に成形される。
[0011] Then, substantially the center of both ends in the axial direction of the substantially cylindrical material is pressed in the axial direction, and the peripheral edge is extruded backward by a surplus flow into a coaxial cylindrical shape by the excess flow. A first intermediate molded body whose substantially center is closed by a closed part is formed, and the closed part of the first intermediate molded body is pressed and pressed in the axial direction and directed radially outward. The second intermediate molded body is molded by projecting the hub spline by flowing the excess
Since the closing plate that closes substantially the center of the body portion of the second intermediate body is removed by punching to form the hub of the clutch device, the forging line is formed on the outer peripheral surface of the cylindrical body portion only by forging. The flow spline is continuous and a high-strength hub spline is formed, and a hub that does not break the hub spline that is frequently subjected to a large load is easily formed.

【0012】請求項4記載のクラッチ装置のハブの成形
方法は、環状のフェージングが周縁近傍の両面に取り付
けられる円板の中央に嵌合して一体的に組み付けられク
ラッチディスクを構成するクラッチ装置のハブを成形す
る成形方法であって、略円筒状の素材の軸方向の両端面
を軸方向に沿って加圧して外周面の所定の位置に外方に
向けて余肉流動させてハブスプラインを突出成形するも
のである。
According to a fourth aspect of the present invention, there is provided a clutch device having a clutch disk, wherein the annular fading is fitted integrally with a center of a disk attached to both surfaces near a peripheral edge to form a clutch disk. A molding method for molding a hub, in which both ends in the axial direction of a substantially cylindrical material are pressurized along the axial direction to allow the excess thickness to flow outward to a predetermined position on the outer peripheral surface, thereby forming a hub spline. It is to be protruded.

【0013】そして、略円筒状の素材の軸方向の両端面
を軸方向に沿って加圧し外方に向けた余肉流動にて外周
面の所定の位置にハブスプラインを突出成形するので、
軸方向に沿って加圧して鍛造成形するのみで円筒状の胴
体部の外周面に鍛流線(flowline)が連続し高強度のハ
ブスプラインが成形され、頻繁に大きな負荷が掛かるハ
ブスプラインが折損しないハブが容易に成形される。
[0013] Since both ends of the substantially cylindrical material in the axial direction are pressurized along the axial direction, and the excess spout flows outward to form the hub spline at a predetermined position on the outer peripheral surface.
By simply forging by pressing along the axial direction, a forging flow line (flowline) is continuous on the outer peripheral surface of the cylindrical body, forming a high-strength hub spline. Not a hub is easily molded.

【0014】[0014]

【発明の実施の形態】以下、本発明の実施の一形態を図
面を参照して説明する。
An embodiment of the present invention will be described below with reference to the drawings.

【0015】図1において、1は筒状体であるハブで、
このハブ1は例えばクラッチ装置のクラッチディスクに
設けられる。
In FIG. 1, reference numeral 1 denotes a cylindrical hub.
The hub 1 is provided, for example, on a clutch disk of a clutch device.

【0016】そして、ハブ1は、内周面に図示しないク
ラッチシャフトが嵌合される略円筒状の胴体部2を備え
ている。そして、この胴体部2の外周面には、軸方向の
略中間部に位置して周方向に沿って壁状の突起部である
ハブスプライン3が、周方向に略等間隔で複数、例えば
3つ一体的に突出形成されている。
The hub 1 has a substantially cylindrical body 2 on the inner peripheral surface of which a clutch shaft (not shown) is fitted. A plurality of hub splines 3, which are wall-shaped protrusions located at a substantially intermediate portion in the axial direction and are formed in the circumferential direction at substantially equal intervals in the circumferential direction, are provided on the outer peripheral surface of the body 2. And are formed integrally.

【0017】次に、上記実施の形態のハブ1を成形する
工程について図面を参照して説明する。
Next, a step of forming the hub 1 of the above embodiment will be described with reference to the drawings.

【0018】まず、あらかじめ所定の寸法に形成された
図2(a)に示す略円柱状の素材11を、図示しない対向
する第1の上型および第1の下型を備えた第1の鍛造加
工装置に、軸方向が第1の上型および第1の下型の対向
方向に沿う状態で装着する。そして、第1の上型および
第1の下型を対向方向に相対的に移動し、素材11の軸方
向の両端面の略中央をそれぞれ軸方向に挟持するように
鍛造加工である加圧する。この加圧により、素材11の周
縁を余肉流動させて同軸上で円筒状の円筒部12を後方押
出するとともに両端面に略中央に略円形凹状の窪み部13
を設け、円筒状の円筒部12の内周面の略中央に窪み部1
3,13間に位置して閉塞する閉塞部14を設けた図2
(b)に示す第1の中間成形体15を鍛造加工にて成形す
る。
First, a substantially cylindrical raw material 11 shown in FIG. 2A, which is formed in a predetermined size in advance, is first forged with a first upper die and a first lower die (not shown). It is mounted on the processing device with the axial direction along the facing direction of the first upper mold and the first lower mold. Then, the first upper mold and the first lower mold are relatively moved in the facing direction, and pressure is applied as forging so as to sandwich the center of both end surfaces in the axial direction of the material 11 in the axial direction. By this pressurization, the peripheral edge of the raw material 11 is made to flow excessively, and the cylindrical cylindrical portion 12 is coaxially extruded rearward, and a substantially circular concave portion 13 is formed at both ends substantially in the center.
Is provided, and a hollow portion 1 is provided at substantially the center of the inner peripheral surface of the cylindrical portion 12.
FIG. 2 with an obstruction 14 located between 3 and 13
The first intermediate body 15 shown in (b) is formed by forging.

【0019】次に、この図2(b)に示す第1の中間成
形体15を、図3および図4に示す第2の鍛造加工装置16
に装着して、第2の中間成形体32を鍛造加工する。すな
わち、第2の鍛造加工装置16は、対向する第2の上型17
および第2の下型18を備えている。そして、第2の上型
17は、内周面にハブ1の胴体部2の外径と略同寸法の上
型円筒孔21を備えた上型保持台22と、この上型保持台22
の上型円筒孔21内に摺動可能に嵌挿保持された略棒状の
上型押圧ピン23とを備えている。また、上型押圧ピン23
の下端面には、略中央に位置して外径がハブ1の内径と
略同寸法の略円柱状の上型加圧部24が略同軸上に下方に
突設されている。なお、この上型加圧部24は、基端から
先端までの突出寸法がハブ1の軸方向の長さ寸法の1/
2より短く、かつ、第1の中間成形体15の一端から閉塞
部14までの距離より長く形成されている。
Next, the first intermediate compact 15 shown in FIG. 2B is converted into a second forging device 16 shown in FIGS.
And the second intermediate molded body 32 is forged. That is, the second forging device 16 is provided with the opposing second upper die 17.
And a second lower mold 18. And the second upper mold
Reference numeral 17 denotes an upper die holder 22 having an upper cylindrical hole 21 on the inner peripheral surface thereof having substantially the same diameter as the outer diameter of the body part 2 of the hub 1;
And a substantially rod-shaped upper die pressing pin 23 slidably fitted and held in the upper cylindrical hole 21. Also, the upper mold pressing pin 23
At the lower end surface of the upper end, a substantially cylindrical upper die pressing portion 24 having an outer diameter substantially equal to the inner diameter of the hub 1 is provided substantially at the center and protrudes downward substantially coaxially. The upper die pressing portion 24 has a protrusion from the base end to the front end that is 1/1 / the axial length of the hub 1.
2 and longer than the distance from one end of the first intermediate molded body 15 to the closing portion 14.

【0020】また、第2の下型18は、内周面にハブ1の
胴体部2の外径と略同寸法の下型円筒孔26を備えた下型
保持台27と、この下型保持台27の下型円筒孔26内に摺動
可能に嵌挿保持された略棒状の下型押圧ピン28とを備え
ている。そして、下型保持台27の下型円筒孔26の周縁に
は、ハブ1のハブスプライン3に対応して周方向に略等
間隔で複数、例えば3箇所に扇状の肉逃げ段部29が設け
られている。この肉逃げ段部29は、下型円筒孔26からの
径方向の幅寸法がハブスプライン3の突出寸法と略同寸
法に形成されている。また、下型押圧ピン28は、第2の
上型17の上型押圧ピン23と同様に、上端面の略中央に位
置して外径がハブ1の内径と略同寸法の略円柱状の下型
加圧部30が略同軸上に上方に向けて突設されている。な
お、この下型加圧部30は、上型加圧部24と同様に、基端
から先端までの突出寸法がハブ1の軸方向の長さ寸法の
1/2より短く、かつ、第1の中間成形体15の一端から
閉塞部14までの距離より長く形成されている。
The second lower mold 18 is provided with a lower mold holding table 27 having an inner peripheral surface having a lower cylindrical hole 26 having substantially the same diameter as the outer diameter of the body 2 of the hub 1. A substantially rod-shaped lower pressing pin 28 is slidably fitted and held in the lower cylindrical hole 26 of the base 27. At the periphery of the lower cylindrical hole 26 of the lower holding table 27, a plurality of, for example, three fan-shaped meat relief steps 29 are provided at substantially equal intervals in the circumferential direction corresponding to the hub splines 3 of the hub 1. Have been. The flesh relief step 29 has a radial width dimension from the lower cylindrical hole 26 substantially equal to the projection dimension of the hub spline 3. Similarly to the upper die pressing pin 23 of the second upper die 17, the lower die pressing pin 28 has a substantially columnar shape having an outer diameter substantially equal to the inner diameter of the hub 1 and located at substantially the center of the upper end surface. The lower mold pressing portion 30 is provided substantially coaxially and protrudes upward. In addition, like the upper die pressing unit 24, the lower die pressing unit 30 has a protrusion from the base end to the distal end shorter than の of the axial length of the hub 1, and Is formed longer than the distance from one end of the intermediate molded body 15 to the closing portion 14.

【0021】そして、下型保持台27の下型円筒孔26内に
第1の中間成形体15を、軸方向が第2の上型17および第
2の下型18の対向方向である下型円筒孔26の軸方向に沿
う状態で挿入して装着する。この後、上型保持台22を下
降して下端面を下型保持台27の上端面に当接させ、下型
押圧ピン28を上方に移動させるとともに上型押圧ピン23
を下方に移動し、下型押圧ピン28および上型押圧ピン23
にて第1の中間成形体15を挟むように加圧する。この加
圧により、円筒部12の内周側が上型加圧部24および下型
加圧部30の周面にて押し広げられるとともに閉塞部14が
上型加圧部24および下型加圧部30の端面にて潰される状
態となり、余肉分が肉逃げ段部29に余肉流動し、図2
(c)および図3に示すように、胴体部2の外周面にハ
ブスプライン3が突出し胴体部2の内周面の略中央に潰
れた閉塞部14である閉塞板31が閉塞する第2の中間成形
体32が成形される。そして、第2の上型17および第2の
下型18を離間するように相対的に移動させて第2の中間
成形体32を脱型する。
Then, the first intermediate molded body 15 is inserted into the lower cylindrical hole 26 of the lower die holding table 27, and the lower die whose axial direction is the facing direction of the second upper die 17 and the second lower die 18. It is inserted and mounted along the axial direction of the cylindrical hole 26. Thereafter, the upper mold holding base 22 is lowered to bring the lower end surface into contact with the upper end surface of the lower mold holding base 27, and the lower mold pressing pin 28 is moved upward and the upper mold pressing pin 23 is moved.
Is moved downward, and the lower die pressing pin 28 and the upper die pressing pin 23
Is pressed so as to sandwich the first intermediate body 15. By this pressurization, the inner peripheral side of the cylindrical portion 12 is spread out on the peripheral surfaces of the upper pressurizing unit 24 and the lower pressurizing unit 30, and the closing unit 14 is closed by the upper pressurizing unit 24 and the lower pressurizing unit. As shown in FIG. 2, the end portion 30 is crushed, and the surplus portion flows to the meat escape step 29.
As shown in FIG. 3C and FIG. 3, the hub spline 3 protrudes from the outer peripheral surface of the body 2, and the closing plate 31, which is the closing portion 14 crushed substantially at the center of the inner peripheral surface of the body 2, is closed. The intermediate molded body 32 is molded. Then, the second upper mold 17 and the second lower mold 18 are relatively moved so as to be separated from each other, and the second intermediate molded body 32 is released from the mold.

【0022】この後、第2の中間成形体32を図示しない
第3の鍛造加工装置に装着し、胴体部2の閉塞板31を打
ち抜き除去して図1および図2(d)に示すハブ1を成
形する。
Thereafter, the second intermediate molded body 32 is mounted on a third forging device (not shown), and the closing plate 31 of the body 2 is punched and removed to remove the hub 1 shown in FIGS. 1 and 2 (d). Is molded.

【0023】ここで、第2の鍛造加工装置16にて得られ
る第2の中間成形体32は、ハブスプライン3が円筒部12
から余肉流動により外方に膨出するように突出して成形
されることから、図1に示すように、胴体部2とハブス
プライン3との鍛流線(flowline)34が連続する。この
ため、図5に示す従来の切削加工によりハブスプライン
43を形成することにより鍛流線44が連続しない構成に比
して、強度が向上し、特に胴体部2の軸方向に沿って外
部から応力が加わっても折損することを防止できる。
Here, the second intermediate formed body 32 obtained by the second forging device 16 has a hub spline 3 having a cylindrical portion 12.
As shown in FIG. 1, a flow line 34 between the body 2 and the hub spline 3 is continuous. Therefore, the hub spline is formed by the conventional cutting shown in FIG.
By forming 43, the strength is improved as compared with the structure in which the grain flow lines 44 are not continuous, and it is possible to prevent breakage even when stress is applied from the outside along the axial direction of the body portion 2.

【0024】上述したように、上記実施の形態によれ
ば、略円柱状の素材11の軸方向の両端面の略中央をそれ
ぞれ軸方向に沿って加圧して周縁を余肉流動にて同軸上
の円筒状に後方押出して成形した第1の中間成形体15の
閉塞部14を、軸方向に沿って加圧挟持して周方向に余肉
流動させ胴体部2の外周面にハブスプライン3を突出成
形して第2の中間成形体32を成形し、この第2の中間形
成体32の胴体部2の略中央を閉塞する閉塞板31を打ち抜
きにより除去してクラッチ装置のハブ1を成形するの
で、鍛造成形のみで円筒状の胴体部2の外周面に鍛流線
(flow line)34が連続し高強度のハブスプライン3が
容易に成形され、頻繁に大きな負荷が掛かるハブスプラ
イン3が折損しないクラッチ装置のハブ1を容易に成形
できる。
As described above, according to the above-described embodiment, substantially the center of both ends in the axial direction of the substantially columnar material 11 is pressurized along the axial direction, and the periphery is coaxially formed by excess flow. The closed portion 14 of the first intermediate molded body 15 extruded backward into a cylindrical shape is pressurized and pinched along the axial direction to allow excess flow in the circumferential direction, and the hub spline 3 is attached to the outer peripheral surface of the body portion 2. The second intermediate molded body 32 is molded by projecting, and the closing plate 31 that closes substantially the center of the body portion 2 of the second intermediate molded body 32 is removed by punching to form the hub 1 of the clutch device. Therefore, the flow line 34 is continuously formed on the outer peripheral surface of the cylindrical body portion 2 only by forging, and the high-strength hub spline 3 is easily formed, and the hub spline 3 to which a large load is frequently applied is broken. The hub 1 of the clutch device that does not need to be formed can be easily formed.

【0025】また、加工が容易な鍛造成形のみによるた
め、製造性が向上するととともに、例えば胴体部が角筒
状や楕円筒状、星形筒状などの切削加工が困難な異形筒
状のものでも容易に成形できる。
Further, since only the forging process, which is easy to process, is used, the productivity is improved, and the body portion has a deformed cylindrical shape, such as a square tubular shape, an elliptic tubular shape, or a star tubular shape, which is difficult to machine. But it can be easily molded.

【0026】なお、上記実施の形態において、クラッチ
装置のハブ1について説明したが、外周面に突起部を設
けたもの、内周面に突起部を設けたもの、外周面および
内周面にそれぞれ突起部を設けたものなど、いずれの用
途の筒状物を対象にできる。なお、内周面に突起部を設
ける構成では、上記実施の形態の第2の中間成形体32の
ハブスプライン3を外方に突出することなく内周面に閉
塞する閉塞板31の略中央部分のみを突起部を残すように
打ち抜き除去すればよい。
In the above embodiment, the hub 1 of the clutch device has been described. However, the hub 1 having the projection on the outer peripheral surface, the one having the projection on the inner peripheral surface, and the hub 1 having the outer peripheral surface and the inner peripheral surface respectively. It can be applied to a cylindrical object for any purpose, such as one having a projection. In the configuration in which the projection is provided on the inner peripheral surface, the substantially central portion of the closing plate 31 that closes the inner peripheral surface without projecting the hub spline 3 of the second intermediate molded body 32 of the above embodiment outward. It is sufficient to punch and remove only the protrusion so as to leave the protrusion.

【0027】また、中実円柱状の素材11から成形した
が、例えば円筒状の素材を軸方向で潰すように加圧し、
外周面の所定の位置に外方に向けて余肉流動させてハブ
スプライン3を成形してもよい。この構成によれば、第
1の中間成形体15を成形する工程、あるいは、閉塞板31
を打ち抜き除去する工程が不要で、1動作で成形でき、
製造工程が簡略化して製造性を向上できるとともに、打
ち抜き除去しないので成形前後の重量変化がなく、設計
上の所定の特性が容易に得られる。
Although molded from a solid cylindrical material 11, for example, a cylindrical material is pressurized so as to be crushed in the axial direction.
The hub spline 3 may be formed by flowing the excess thickness outward at a predetermined position on the outer peripheral surface. According to this configuration, the step of molding the first intermediate molded body 15 or the closing plate 31
There is no need for a step of punching and removing
The manufacturing process can be simplified and the manufacturability can be improved, and there is no weight change before and after the molding because punching and removal are not performed, and a predetermined characteristic in design can be easily obtained.

【0028】[0028]

【発明の効果】請求項1記載の筒状体によれば、略筒状
の胴体部の内周面および外周面のうちの少なくともいず
れか一方に鍛造加工により突起部を突出形成するため、
胴体部と突起部との鍛流線(flow line)が連続し、突
起部の強度が増大して折損を防止できる。
According to the first aspect of the present invention, at least one of the inner peripheral surface and the outer peripheral surface of the substantially cylindrical body is formed with a projection by forging.
The flow line between the body and the projection is continuous, and the strength of the projection is increased, so that breakage can be prevented.

【0029】請求項2記載のクラッチ装置のハブによれ
ば、略円筒状の胴体部の外周面に鍛造加工によりハブス
プラインを突出成形するため、胴体部とハブスプライン
との鍛流線(flow line)が連続し、頻繁に大きな負荷
が掛かるハブスプラインの強度が増大して折損を防止で
きる。
According to the hub of the clutch device of the second aspect, since the hub spline is projected and formed on the outer peripheral surface of the substantially cylindrical body by forging, the flow line between the body and the hub spline is formed. ) Is continuous, and the strength of the hub spline, which is frequently subjected to a large load, increases, thereby preventing breakage.

【0030】請求項3記載のクラッチ装置のハブの成形
方法によれば、略円柱状の素材の軸方向の両端面の略中
央をそれぞれ軸方向に沿って加圧して周縁を余肉流動に
て同軸上の円筒状に後方押出して成形した第1の中間成
形体の閉塞部を、軸方向に沿って加圧挟持して径方向の
外方に向けて余肉流動させてハブスプラインを突出形成
して第2の中間成形体を成形し、この第2の中間形成体
の胴体部の略中央を閉塞する閉塞板を打ち抜きにより除
去してクラッチ装置のハブを成形するため、鍛造成形の
みで円筒状の胴体部の外周面に鍛流線(flow line)が
連続して高強度のハブスプラインを成形でき、頻繁に大
きな負荷が掛かるクラッチ装置のハブスプラインが折損
しないハブを容易に成形できる。
According to the method of forming a hub of a clutch device according to the third aspect, substantially the center of both end surfaces in the axial direction of the substantially cylindrical material is pressed along the axial direction, and the peripheral edge is caused to flow by excess flow. The closed portion of the first intermediate molded body formed by being extruded backward and coaxially into a cylindrical shape is pressurized and pinched along the axial direction, and the excess flow is made radially outward to form the hub spline. To form a second intermediate molded body, and to form a hub of the clutch device by punching out a closing plate that closes substantially the center of the body portion of the second intermediate formed body. A high-strength hub spline can be formed continuously with a flow line on the outer peripheral surface of the torso-shaped body portion, and a hub that does not break the hub spline of a clutch device that is frequently subjected to a large load can be easily formed.

【0031】請求項4記載のクラッチ装置のハブの成形
方法によれば、略円筒状の素材の軸方向の両端面を軸方
向に沿って加圧し外方に向けて余肉流動して外周面の所
定の位置にハブスプラインを突出成形するため、軸方向
に沿って加圧して鍛造成形するのみで円筒状の胴体部の
外周面に鍛流線(flow line)が連続する高強度のハブ
スプラインを成形でき、頻繁に大きな負荷が掛かるクラ
ッチ装置のハブスプラインが折損しないハブを容易に成
形できる。
According to the method of forming a hub of a clutch device according to the fourth aspect, both ends in the axial direction of the substantially cylindrical material are pressurized along the axial direction, and the excess flow is made outward and the outer peripheral surface is formed. A high-strength hub spline that has a flow line continuous with the outer peripheral surface of the cylindrical body only by forging by pressing along the axial direction to protrude and form the hub spline at a predetermined position. And a hub that does not break the hub spline of the clutch device that is frequently subjected to a large load can be easily formed.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の実施の形態を示すクラッチ装置のハブ
を示す一部を切り欠いた斜視図である。
FIG. 1 is a partially cutaway perspective view showing a hub of a clutch device according to an embodiment of the present invention.

【図2】同上ハブを成形する工程を示す説明図である。 (a)素材を示す断面図 (b)第1の中間成形体を示す断面図 (c)第2の中間成形体を示す断面図 (d)ハブを示す断面図FIG. 2 is an explanatory view showing a step of forming the hub. (A) Sectional view showing a material (b) Sectional view showing a first intermediate molded body (c) Sectional view showing a second intermediate molded body (d) Sectional view showing a hub

【図3】同上第2の鍛造加工装置により第2の中間成形
体を成形する状況を示す説明図である。
FIG. 3 is an explanatory view showing a situation in which a second intermediate molded body is formed by a second forging apparatus according to the first embodiment.

【図4】同上第2の鍛造加工装置の第2の下型を示す平
面図である。
FIG. 4 is a plan view showing a second lower die of the second forging apparatus.

【図5】従来例のクラッチ装置のハブを示す一部を切り
欠いた斜視図である。
FIG. 5 is a partially cutaway perspective view showing a hub of a conventional clutch device.

【符号の説明】[Explanation of symbols]

1 筒状体であるクラッチ装置のハブ 2 胴体部 3 突起部であるハブスプライン 11 素材 12 円筒部 14 閉塞部 15 第1の中間成形体 31 閉塞板 32 第2の中間成形体 DESCRIPTION OF SYMBOLS 1 Hub of a clutch device which is a cylindrical body 2 Body part 3 Hub spline which is a projection 11 Material 12 Cylindrical part 14 Closure part 15 First intermediate molded body 31 Closure plate 32 Second intermediate molded body

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 略筒状の胴体部と、 この胴体部の内周面および外周面のうちの少なくともい
ずれか一方に鍛造加工により突出して形成された突起部
とを具備したことを特徴とした筒状体。
1. A body comprising: a substantially cylindrical body; and a projection formed on at least one of an inner peripheral surface and an outer peripheral surface of the body by forging. Cylindrical body.
【請求項2】 環状のフェージングが周縁近傍の両面に
取り付けられる円板の中央に嵌合して一体的に組み付け
られクラッチディスクを構成するクラッチ装置のハブで
あって、 略円筒状の胴体部と、 この胴体部の外周面に鍛造加工により突出して形成され
たハブスプラインとを具備したことを特徴としたクラッ
チ装置のハブ。
2. A hub of a clutch device, wherein an annular fading is fitted in the center of a disk attached to both surfaces near a peripheral edge and integrally assembled to form a clutch disk, comprising a substantially cylindrical body portion. A hub for a clutch device, comprising: a hub spline formed by forging on an outer peripheral surface of the body portion.
【請求項3】 環状のフェージングが周縁近傍の両面に
取り付けられる円板の中央に嵌合して一体的に組み付け
られクラッチディスクを構成するクラッチ装置のハブを
成形する成形方法であって、 略円柱状の素材の軸方向の両端面の略中央をそれぞれ軸
方向に沿って加圧して周縁を余肉流動にて同軸上の円筒
状に後方押出して円筒部およびこの円筒部の内周面の略
中央を閉塞する閉塞部を有した第1の中間成形体を成形
し、 この第1の中間成形体の閉塞部を軸方向に沿って加圧挟
持して径方向の外方に向けて余肉流動してハブスプライ
ンを突出成形し、胴体部、この胴体部の内周面の略中央
を閉塞する閉塞板および前記胴体部の外周面に突出する
ハブスプラインを備えた第2の中間成形体を成形し、 この第2の中間成形体の閉塞板を打ち抜きにより除去す
ることを特徴とするクラッチ装置のハブの成形方法。
3. A molding method for molding a hub of a clutch device, wherein an annular fading is fitted in the center of a disk attached to both surfaces near a peripheral edge and integrally assembled to form a clutch disk, comprising a substantially circular shape. Approximately the center of both end surfaces in the axial direction of the columnar material is respectively pressed in the axial direction, and the peripheral edge is extruded rearward into a coaxial cylinder by excess flow to substantially extend the cylindrical portion and the inner peripheral surface of the cylindrical portion. Forming a first intermediate molded body having a closed portion that closes the center, pressurizing and clamping the closed portion of the first intermediate molded body along the axial direction, and making the excess radially outward. A second intermediate molded body having a body portion, a closing plate for closing a substantially center of an inner peripheral surface of the body portion, and a hub spline projecting on an outer peripheral surface of the body portion is formed by flowing and forming a hub spline so as to project. Molding, and punching out the closing plate of the second intermediate molded body A method for forming a hub of a clutch device, comprising:
【請求項4】 環状のフェージングが周縁近傍の両面に
取り付けられる円板の中央に嵌合して一体的に組み付け
られクラッチディスクを構成するクラッチ装置のハブを
成形する成形方法であって、 略円筒状の素材の軸方向の両端面を軸方向に沿って加圧
して外周面の所定の位置に外方に向けて余肉流動させて
ハブスプラインを突出成形することを特徴とするクラッ
チ装置のハブの成形方法。
4. A molding method for molding a hub of a clutch device, wherein an annular fading is fitted to a center of a disk attached to both surfaces near a peripheral edge and integrally assembled to form a clutch disk, comprising: A hub for a clutch device, characterized in that both end faces in the axial direction of a cylindrical material are pressurized along the axial direction to flow outwardly to a predetermined position on the outer peripheral surface to form a hub spline in a protruding manner. Molding method.
JP2000129090A 2000-04-28 2000-04-28 Tubular body, hub for clutch apparatus, and forming method Pending JP2001311436A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000129090A JP2001311436A (en) 2000-04-28 2000-04-28 Tubular body, hub for clutch apparatus, and forming method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000129090A JP2001311436A (en) 2000-04-28 2000-04-28 Tubular body, hub for clutch apparatus, and forming method

Publications (1)

Publication Number Publication Date
JP2001311436A true JP2001311436A (en) 2001-11-09

Family

ID=18638420

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000129090A Pending JP2001311436A (en) 2000-04-28 2000-04-28 Tubular body, hub for clutch apparatus, and forming method

Country Status (1)

Country Link
JP (1) JP2001311436A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006198662A (en) * 2005-01-21 2006-08-03 Kubota Tekkosho:Kk Method for forming hollow stepped shaft
CN104368735A (en) * 2014-11-25 2015-02-25 张家港海陆环形锻件有限公司 Tool used for forging blank of heavy mining truck wheel hub

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006198662A (en) * 2005-01-21 2006-08-03 Kubota Tekkosho:Kk Method for forming hollow stepped shaft
CN104368735A (en) * 2014-11-25 2015-02-25 张家港海陆环形锻件有限公司 Tool used for forging blank of heavy mining truck wheel hub

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