JPS58148028A - Manufacture of shaft having eccentric part - Google Patents

Manufacture of shaft having eccentric part

Info

Publication number
JPS58148028A
JPS58148028A JP57030241A JP3024182A JPS58148028A JP S58148028 A JPS58148028 A JP S58148028A JP 57030241 A JP57030241 A JP 57030241A JP 3024182 A JP3024182 A JP 3024182A JP S58148028 A JPS58148028 A JP S58148028A
Authority
JP
Japan
Prior art keywords
parts
tube
rings
eccentric
small diameter
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
JP57030241A
Other languages
Japanese (ja)
Inventor
Masanobu Nakamura
正信 中村
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP57030241A priority Critical patent/JPS58148028A/en
Priority to DE19833303629 priority patent/DE3303629C2/en
Publication of JPS58148028A publication Critical patent/JPS58148028A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033—Deforming tubular bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/84—Making other particular articles other parts for engines, e.g. connecting-rods
    • B21D53/845—Making camshafts

Abstract

PURPOSE:To thicken the thickness of rings, etc. at small diameter parts and to prevent damage due to load in forming a shaft having eccentric parts by fitting rings or eccentric blocks to a blank tube, by depressing the parts at which small diameter parts such as rings etc. are positioned. CONSTITUTION:Among positions at which eccentric parts are to be formed by fitting rings to a blank tube 1, the positions where small diameter parts are positioned finally are depressed 1a, 1a by a roller, press, etc. Rings 2 of definite thickness having inner diameter slightly larger than the outer diameter of the material tube 1 are inserted into the tube 1 and matched to depessed parts 1a. Then, the tube 1 is bulged, and areas including depressed parts of the tube 1, that is, depressed part 1a and opposite parts 1b or either of them are bulged together with rings 2 by a specified amount. Since the positions at which small diameter parts 2a of the rings 2 in the tube 1 are to be positioned are depressed beforehand, the amount of projection after bulding can be made small.

Description

【発明の詳細な説明】[Detailed description of the invention]

特公昭４６−７６４４号公報には、第１図に示すように
、素材管ＩＡ）の要所に、一定肉厚の円環（Ｂ）を外挿
゛した状態で、素材管（Ａ）における前記円環（Ｂ）の
内側部分（Ａ′）を、バルジ加工等によって偏心的に膨
出させることにより、素材管（Ａ）と円環（Ｂ）とを一
体的に結合してなる偏心部を有するシー、・フトと、そ
の製造方法について記載されている。 また、第２図示のように、素材管ｆＣ）の要所に、所要
の寸度形状を有する不等肉厚の偏心ブロックｆＤ）を、
焼嵌め等により固着してなる偏心部を有するシャフトも
、公知である。 しかし、これらのものにおいて、素材管（ＡＪ（（Ｊの
軸線ａ−ａ％　ｂ−ｂより偏心部の小径部（、Ｂ’ＸＤ
’）ノ外面までの距離（３Ｃ）（ｙ）が小さい場合には
、該小径部ＣＢ’ＸＤりにおける前記円環ＣＢ）又は偏
心ブロック（Ｄ）の肉厚は薄くなってしまう。 そのため、荷重を受けた際、この部分より割れ易く、使
用に堪えないこととなり、また場合によっては実施不可
能となる。 その理由は、第１図に示したような円環（Ｂ）を使用し
た場合には、バルジ加工のために、その小径部（Ｂ′）
が位置する素材管（Ａ）の部分の半径は、その加工前の
半径と同一か、又は必ず大となっており、また第２図に
示したような偏心カム（′Ｄ）を使用した場合には、そ
の小径部（Ｄ′）が位置する素材管（Ｃ）の部分の半径
は、実質的には、その加工前の半径と等しく、従って、
前記距離（Ｘ）（３’）が小さい場合には、前記小径部
（Ｂ’）（Ｄ’）の肉厚は、それに応じて小となってし
まうからである。 本発明は、前記したような管体を素材とし、これに円環
もしくは偏心ブロックを嵌合した偏心部を有するシャフ
トにおいて、前記のような強度上の懸念を除去するため
、素材管の軸線より、偏心部の小径部の外面までの距離
が小さい場合においても、この小径部における前記円環
もしくは偏心ブロックの肉厚を、十分厚くしうるように
したものである。 第６図以下は、本発明の実施要領の一例を示す。 まず＠３図に示すように、素材管（１）における円環（
２）を嵌合して偏心部を形成しようとする個所の中、最
終的に小径部が位置することとなる部位を、ローラまた
はプレス等の適宜手段で凹入（１ａ）（１ａ）させる。 これに代わり、小径の素材管を使用し、バルジ加工等に
より、前記凹入部（１ａ）以外の部分を膨らませてもよ
い。 ついで、この状態の素材管（１）の外径よりもやや大径
の内孔を有する一定肉厚の円環（２）を、素材管（１）
に挿入して、前記凹入部（１ａ）と整合させる。 ライで、所要の型内において、素材管（ｔ）Ｋバルジ加
工を施すことにより、素材管（１）における前記凹入部
（１ａ）を含む領域、すなわち、凹入部（１ａ）と・そ
の対向部（１ｂ）、もしくはそのいずれか一方を、円環
（２）とともに、所要量膨出させる。 この膨出の際、膨出した円環（２）の両側縁部において
、素材管（１）を、やや外方へ突出（１Ｃ）させ、この
突出部（１Ｃ）により、円環（２）を受止させるのがよ
い。 このように、本発明においては、素材管（１）における
円環（２）の小径部In Japanese Patent Publication No. 46-7644, as shown in Fig. 1, a circular ring (B) of a constant thickness is inserted into the key point of the material tube (IA), and An eccentric part formed by integrally joining the material tube (A) and the ring (B) by eccentrically bulging the inner part (A') of the ring (B) by bulging or the like. This paper describes a sea-foot having the following characteristics and a method for manufacturing the same. In addition, as shown in the second diagram, eccentric blocks fD) of unequal wall thickness and having the required dimensions and shape are placed at key points of the material tube fC).
A shaft having an eccentric portion fixed by shrink fitting or the like is also known. However, in these materials, the small diameter part of the eccentric part (, B'XD
If the distance (3C) (y) to the outer surface of the ring CB') is small, the wall thickness of the circular ring CB' or the eccentric block (D) at the small diameter portion CB'XD becomes thin. Therefore, when a load is applied, this part is more likely to break, making it unusable and, in some cases, impracticable. The reason for this is that when a ring (B) as shown in Figure 1 is used, the small diameter part (B') is
The radius of the part of the material tube (A) where is located is always the same as or larger than the radius before processing, and if an eccentric cam ('D) as shown in Fig. 2 is used. In this case, the radius of the portion of the material tube (C) in which the small diameter portion (D') is located is substantially equal to the radius before processing, and therefore,
This is because when the distance (X) (3') is small, the thickness of the small diameter portions (B') (D') becomes small accordingly. The present invention aims to eliminate the above-mentioned strength concerns in a shaft that is made of a tube as described above and has an eccentric portion in which a ring or an eccentric block is fitted. Even when the distance to the outer surface of the small diameter part of the eccentric part is small, the thickness of the ring or eccentric block in the small diameter part can be made sufficiently thick. FIG. 6 and subsequent figures show an example of the implementation procedure of the present invention. First, as shown in Figure @3, the circular ring (
2) is to be fitted to form an eccentric portion, the portion where the small diameter portion will ultimately be located is recessed (1a) (1a) using an appropriate means such as a roller or press. Alternatively, a small-diameter material tube may be used and the portion other than the recessed portion (1a) may be expanded by bulge processing or the like. Next, a circular ring (2) having a constant wall thickness and having an inner hole slightly larger in diameter than the outer diameter of the material tube (1) in this state is attached to the material tube (1).
and align it with the recess (1a). By performing K bulge processing on the raw material tube (t) in a required mold in a lie, the region of the raw material tube (1) including the recessed portion (1a), that is, the recessed portion (1a) and its opposing portion. (1b), or either one thereof, together with the ring (2), is expanded by the required amount. During this bulge, the material tube (1) is slightly protruded outward (1C) at both side edges of the bulged ring (2), and this protrusion (1C) causes the ring (2) to It is better to have them accept it. In this way, in the present invention, the small diameter portion of the ring (2) in the material tube (1)

【２ａ】が位置する個所は、バルジ
加工に先立って、やや凹入（１ａ）されているため、バ
ルジ加工（［＆ける核部分の突出量を、第１図に示した
従来方法によるものに比して、小とすることができ、極
端な場合には、この部分を、素材管ｆｌ）の本来の外周
面と同一、又はそれ以下とすることも可能である。 従って、前記した従来のものに比して、小径部（２ａ）
の肉厚の大きな円環（２）を使用することができ製造さ
れた偏心部を有するシャフトにおいては、冒頭に述べた
従来のもののように、円環の小径部の強度が不足するこ
とはない。 なお本発明は、第２図に示したような、偏心ブロック（
Ｄ）を素材管（（Ｊの要所に嵌合固着したシャフトを製
造するにも適用しうろことは自明でちる。The area where [2a] is located has been slightly recessed (1a) prior to bulge machining, so the protrusion amount of the core portion of the bulge machining process ([&) was determined by the conventional method shown in Figure 1. In comparison, it can be made smaller, and in extreme cases, it is also possible to make this part the same as or smaller than the original outer peripheral surface of the material tube fl). Therefore, compared to the conventional one described above, the small diameter portion (2a)
In a shaft with an eccentric part that can use a ring (2) with a large wall thickness, the strength of the small diameter part of the ring will not be insufficient as in the conventional shaft mentioned at the beginning. . The present invention is directed to an eccentric block (as shown in FIG. 2).
It is self-evident that D) can also be applied to manufacturing a shaft that is fitted and fixed to the key points of the material tube (J).

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

第１図は、管材を素材として製造した偏心部を有するシ
ャフトの一例を示す縦断正面図、第２図は、同じく異な
る例を示す縦断正面図、第５図は、本発明方法の中間過
程を示す縦断正面図、 第４図は、本発明方法により製造された偏心部を有する
シャフトの縦断正面図である。Fig. 1 is a longitudinal sectional front view showing an example of a shaft having an eccentric portion manufactured from a tube material, Fig. 2 is a longitudinal sectional front view showing a different example, and Fig. 5 shows an intermediate step of the method of the present invention. Fig. 4 is a longitudinal sectional front view of a shaft having an eccentric portion manufactured by the method of the present invention.

Claims (3)

【特許請求の範囲】[Claims] （１）素材管の要所に凹入部を形成するとともに、環状
体を、該凹入部と整合するべく素材管に嵌合し、ついで
、宰材管にバルジ加工を施すことにより、前記凹入部を
含む領域を、前記環状体とともに所要量膨出させて、環
状体を素材管に固着することを特徴とする偏心部を有す
るシャフトの製造方法。(1) By forming recesses at important points in the material pipe, fitting the annular body into the material pipe so as to align with the recesses, and then performing bulge processing on the material pipe, the recesses A method for manufacturing a shaft having an eccentric portion, characterized in that the region including the annular body is bulged by a required amount together with the annular body, and the annular body is fixed to a material tube. （２）環状体が、一定肉厚の円環であることを特徴とす
る特許請求の範囲第ｆｌ）項に記載の方法。(2) The method according to claim fl), wherein the annular body is a circular ring having a constant wall thickness. （３）環状体が、偏心ブロックであることを特徴とする
特許請求の範囲第（１）項に記載の方法。(3) The method according to claim (1), wherein the annular body is an eccentric block.
JP57030241A 1982-02-26 1982-02-26 Manufacture of shaft having eccentric part Pending JPS58148028A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP57030241A JPS58148028A (en) 1982-02-26 1982-02-26 Manufacture of shaft having eccentric part
DE19833303629 DE3303629C2 (en) 1982-02-26 1983-02-03 Method for manufacturing a camshaft with at least one eccentric cam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57030241A JPS58148028A (en) 1982-02-26 1982-02-26 Manufacture of shaft having eccentric part

Publications (1)

Publication Number Publication Date
JPS58148028A true JPS58148028A (en) 1983-09-03

Family

ID=12298208

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57030241A Pending JPS58148028A (en) 1982-02-26 1982-02-26 Manufacture of shaft having eccentric part

Country Status (1)

Country Link
JP (1) JPS58148028A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5101554A (en) * 1986-10-01 1992-04-07 Emitec Gesellschaft Fur Emissionstechnologie Mbh Process for producing an assembled camshaft as well as assembled camshaft consisting of a shaft tube and slid-on elements
WO2000051759A1 (en) * 1999-03-03 2000-09-08 SE Sächsische Elektronenstrahl GmbH Method for producing a camshaft and camshaft produced according to said method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5101554A (en) * 1986-10-01 1992-04-07 Emitec Gesellschaft Fur Emissionstechnologie Mbh Process for producing an assembled camshaft as well as assembled camshaft consisting of a shaft tube and slid-on elements
WO2000051759A1 (en) * 1999-03-03 2000-09-08 SE Sächsische Elektronenstrahl GmbH Method for producing a camshaft and camshaft produced according to said method
JP2003505245A (en) * 1999-03-03 2003-02-12 エス エー ゼキジシェ エレクトロネンシュトラール ゲゼルシャフト ミット ベシュレンクテル ハフツング Method for manufacturing a camshaft and camshaft manufactured according to this method

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