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JPS62130725A - Production of hollow assembly cam shaft - Google Patents

Production of hollow assembly cam shaft

Info

Publication number
JPS62130725A
JPS62130725A JP27164285A JP27164285A JPS62130725A JP S62130725 A JPS62130725 A JP S62130725A JP 27164285 A JP27164285 A JP 27164285A JP 27164285 A JP27164285 A JP 27164285A JP S62130725 A JPS62130725 A JP S62130725A
Authority
JP
Japan
Prior art keywords
cam
pipe
journal
unevenness
shape
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
JP27164285A
Other languages
Japanese (ja)
Inventor
Seiji Makino
誠二 牧野
Yukio Hosotsubo
幸男 細坪
Kazuyuki Shito
和之 市東
Fumio Kiyota
清田 文男
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.)
Riken Corp
Original Assignee
Riken Corp
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 Riken Corp filed Critical Riken Corp
Priority to JP27164285A priority Critical patent/JPS62130725A/en
Publication of JPS62130725A publication Critical patent/JPS62130725A/en
Pending legal-status Critical Current

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  • Gears, Cams (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

PURPOSE:To prevent the force higher than the allowable stress working and to prevent deformation and breakage by interposing the buffer consisting of the soft material having sufficient elongation between a pipe and a cam or a journal, etc. CONSTITUTION:The unevenness 4 of a triangular tooth serration shape or the unevenness of knurling shape is formed on the inner peripheral face of the cam 2 and journal, etc., consisting of the wear resistant material which is fitted to the outer peripheral face of the pipe 1 of a hollow assembly cam shaft and the pipe 1. The unevenness of a triangular tooth serration shape of the buffer 6 consisting of the soft material annularly formed is interposed between the pipe 1 and cam 2 or journal, etc. And when the unevenness of the pipe 1 is fitted to the unevenness of the cam 2 and journal by expanding the pipe 1, the buffer 6 is combined as well by following the change thereof and the deformation and breakage of the cam 2 and journal are prevented as well as the sufficient combining strength.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は内燃機関用カムシャフトの製造方法に係り、更
に詳しくは中空組立てカムシャフトの鋼製パイプと耐摩
耗性材料からなるカムやジャーナル等の部材との結合方
法に関するものである。
DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for manufacturing a camshaft for an internal combustion engine, and more particularly to members such as cams and journals made of steel pipes and wear-resistant materials for hollow assembled camshafts. This relates to the method of combining with.

従来の技術と問題点 内燃機関用のカムシャフトの製造方法としては。Conventional technology and problems How to manufacture camshafts for internal combustion engines.

従来からの鋳造による方法や熱間鍛造による方法及び最
近エンジンの高性能化、軽量化の要求に対応するものと
して、鋼製パイプと耐摩耗性材料からなるカムやジャー
ナル等の部材を組合せた中空組立てカムシャフト等があ
る。
In response to the traditional methods of casting and hot forging, as well as recent demands for higher performance and lighter weight engines, hollow steel pipes are combined with parts such as cams and journals made of wear-resistant materials. There are assembled camshafts, etc.

鋳造カムシャフトも軽量化の為の中空化技術が確立され
つつあるが、材質面では従来と変わらないため、耐摩耗
性が必要とされる摺動部のカム表面は焼入れ又はチル化
させた硬化層が設けられている。又熱間鍛造によるカム
シャフトは、製造技術上、中空化することは難しく確立
された技術もなく軽量化が困難であり、且つ材質面でも
高い耐摩耗性材料を用いることはできず、カム表面ば高
周波焼き入れ等による硬化層が設けられているのが現状
である。
Hollowing technology for cast camshafts is being established to reduce weight, but the material remains the same, so the cam surface of the sliding part, which requires wear resistance, is hardened by quenching or chilling. There are layers. In addition, it is difficult to make a camshaft made by hot forging hollow due to manufacturing technology, there is no established technology, and it is difficult to reduce the weight of the camshaft. For example, at present, a hardened layer is provided by induction hardening or the like.

又中空組立てカムシャフトにおける、強度に優れた鋼か
らなるパイプと耐摩耗性に優れた焼結合金等からなるカ
ムやジャーナル等の摺動部材との結合による方法は、従
来の鋳造や熱間鍛造による方法に較べて軽量、耐摩耗性
に優れた利点はあるが、その結合方法として、ろう付は
方法や液相焼結による方法、及びパイプを拡管すること
による拡管結合方法等があるがいずれも一長一短があり
In addition, for hollow assembled camshafts, the method of joining sliding members such as cams and journals made of pipes made of steel with excellent strength and sintered alloys with excellent wear resistance is not possible using conventional casting or hot forging. There are several joining methods, such as brazing, liquid phase sintering, and pipe expansion joining methods, which have the advantage of being lighter and more wear resistant than conventional methods. There are also pros and cons.

接合時に熱処理工程を伴うものはパイプの熱歪による曲
がりが大きく被削性の悪いカムシャフトの仕上げ研磨式
を大きくする必要が生じて生産性の低下を生ずる。
If a heat treatment process is involved during joining, the pipes will bend significantly due to thermal distortion, and the camshaft has poor machinability, so it will be necessary to increase the final polishing method, resulting in a decrease in productivity.

又拡管結合方法においても、パイプにカム等の部品を強
固に取付けるためにはパイプを5%以上の割合で拡管す
ることが必要であり、そのためにカム等の穴径が数%の
拡大を強いられることになり円周方向に引張り応力が働
くので、カムやジャーナルとして伸びの小さい焼結合金
やセラミックスなどを使用する際の材質の伸びとの関係
及び接合強度との関係等によっては、適切な拡管率でな
ければカム等の部品に許容応力以上の力が作用して変形
や割れを発生させるという問題があった。
Also, in the pipe expansion and connection method, in order to firmly attach parts such as cams to the pipe, it is necessary to expand the pipe by a rate of 5% or more, and for this reason, the hole diameter of the cam etc. has to be expanded by a few percent. Therefore, when using sintered alloys or ceramics with low elongation as cams and journals, the appropriate If the pipe expansion ratio is not correct, there is a problem in that a force exceeding the allowable stress acts on components such as cams, causing deformation and cracking.

問題点を解決するための手段 本発明は、かかる従来の問題点に着目してなされたもの
であり、拡管接合方法におけるカムやジャーナル等の変
形や割れを防止する接合方法を提供するものであり、パ
イプとカムやジャーナル等の間に十分な伸びを有する軟
質材料からなる緩衝材を介在させることにより、パイプ
の拡管力が直接カムやジャーナル等に及ぼさないように
して。
Means for Solving the Problems The present invention has been made in view of these conventional problems, and provides a joining method that prevents deformation and cracking of cams, journals, etc. in the pipe expansion joining method. By interposing a cushioning material made of a soft material with sufficient elongation between the pipe and the cam, journal, etc., the expansion force of the pipe does not directly apply to the cam, journal, etc.

カムやジャーナルに許容応力以上の力が働くことを防止
して、カムやジャーナルの変形や破損を防止するもので
ある。
This prevents a force exceeding the allowable stress from acting on the cam or journal, thereby preventing deformation or damage to the cam or journal.

本発明による中空組立てカムシャフトを構成するパイプ
とカムやジャーナル等の部品との間に挿入する軟質材か
らなる緩衝材は例えば銅や銅合金或はアルミ合金や樹脂
等からなり、パイプの三角歯セレーション形状の凹凸状
をした環体或はリング状に形成されている。
The cushioning material made of a soft material inserted between the pipe constituting the hollow assembled camshaft of the present invention and parts such as cams and journals is made of, for example, copper, copper alloy, aluminum alloy, resin, etc. It is formed in the shape of an annular body or a ring with serration-like unevenness.

緩衝材を介在させることによりパイプとカムやジャーナ
ル等との結合力が低下するのを防止して結合力を高める
ため、又カムの回転防止やカムの位相を決定するために
予めパイプの外表面及びカムやジャーナルの孔の内周面
に刻設された。三角歯セレーション形状の凹凸或いはロ
ーレット溝による凹凸を有するパイプにカム、やジャー
ナルを嵌挿し、夫々の凹凸の空隙部に前記の軟質材を入
れてパイプを拡管することにより、パイプとカムやジャ
ーナルが結合されるものである。
In order to prevent the coupling force between the pipe and the cam, journal, etc. from decreasing by interposing a buffer material and increase the coupling force, and to prevent the rotation of the cam and determine the phase of the cam, the outer surface of the pipe is and engraved on the inner peripheral surface of the hole of the cam or journal. By inserting a cam or journal into a pipe that has irregularities in the form of triangular tooth serrations or knurled grooves, and expanding the pipe by inserting the soft material into the voids of each irregularity, the pipe and the cam or journal can be It is something that is combined.

その結果、パイプの拡管力は直接カムやジャーナルの部
品等に及ぼさず、軟質材が緩衝帯となりこれが弾性変形
して局部的な高応力部分が発生することを防止し、伸び
の小さい耐摩耗性材料で製造されたカムやジャーナル等
の許容応力を超えずに、更にパイプとカムやジャーナル
の相互の凹凸の噛合わせによって拡管率が小さくても強
固に結合することが可能となり、変形や破損することが
なくなるものである。
As a result, the expansion force of the pipe does not directly affect the cam and journal parts, and the soft material acts as a buffer zone, which elastically deforms and prevents the generation of localized high stress areas, resulting in wear resistance with low elongation. By not exceeding the allowable stress of cams, journals, etc. made of the material, and by meshing the concavities and convexities of the pipe with the cams and journals, it is possible to firmly connect them even if the expansion rate is small, preventing deformation or damage. Things will disappear.

尚緩衝材の介在により、パイプとカムやジャーナルとの
結合が不充分となるのを防ぐために、凹凸の形状、大き
さや緩衝材の剛性、形状寸法等は適宜選定する必要があ
る。
In order to prevent insufficient coupling between the pipe and the cam or journal due to the presence of the cushioning material, it is necessary to appropriately select the shape and size of the unevenness, the rigidity of the cushioning material, the shape and dimensions, etc.

実施例 本発明の実施例を図面に基づいて説明する。Example Embodiments of the present invention will be described based on the drawings.

第1図に示すように、中空組立てカムシャフトのパイプ
1の外周面には、緩衝材との結合力を高めるために又カ
ムやジャーナルの回転防止或はカムの位相を決定するた
めに、三角歯セレーション形状の凹凸4又はロレット溝
の凹凸5がパイプの全長に、或は第8図、第9図に示す
ようにカムの定位1!(a)とジャ、−ナルの定位II
 (b)に刻設されたものである。このパイプに第2図
に示すような内周面にパイプ1の凹凸に嵌合する三角歯
セレーション形状の凹凸4或はローレット溝の凹凸5を
有するカム2とジャーナル3及び第3図に示すように前
記の三角歯セレーション形状の凹凸状或いはリング状の
軟質材からなる緩衝材6を介在さして第4図と第5図に
示すように嵌挿した後、パイプ1を拡管することにより
第6図と第7図に示すようにカム2やジャーナル3の凹
凸にパイプ1の凸凹が喰いこみ、その時緩衝材6もその
変化に追随して結合されるので、その結果十分な結合強
度と共にカム2やジャーナル3の変形や破損の発生は全
く無くなった。
As shown in Fig. 1, the outer peripheral surface of the pipe 1 of the hollow assembled camshaft has a triangular shape in order to increase the bonding force with the cushioning material, prevent the rotation of the cam and journal, or determine the phase of the cam. The tooth serration-shaped unevenness 4 or the knurled groove unevenness 5 extends along the entire length of the pipe, or as shown in FIGS. 8 and 9, the cam position 1! (a) and ja-naru localization II
(b). This pipe has a cam 2 and a journal 3 having triangular serration-shaped unevenness 4 or knurled groove unevenness 5 on the inner peripheral surface that fits into the unevenness of the pipe 1 as shown in FIG. After inserting the cushioning material 6 made of a soft material having a triangular tooth serration shape or a ring shape as shown in FIG. 4 and FIG. As shown in FIG. 7, the unevenness of the pipe 1 bites into the unevenness of the cam 2 and journal 3, and at that time, the buffer material 6 follows the change and is bonded, so that the cam 2 and the journal 3 have sufficient bonding strength. There was no longer any deformation or damage to the journal 3.

更に緩衝材6を介在せるために、パイプ1とカム2やジ
ャーナル3との間に適宜な隙間が形成されるが、隙間に
多少の差が生じても緩衝材6にて充分に対応することが
できるので、高い加工精度が要求される一パイプに直接
カム等の部材を嵌挿結合する場合に比し加工精度はあま
り要求されないので加工も容易となった。
Furthermore, in order to interpose the buffer material 6, an appropriate gap is formed between the pipe 1 and the cam 2 and journal 3, but even if there is a slight difference in the gap, the buffer material 6 should be able to sufficiently accommodate the difference. Compared to the case where a member such as a cam is directly inserted into and connected to a pipe, which requires high processing accuracy, processing becomes easier because processing accuracy is not required as much.

効果 本発明による。中空組立てカムシャフトにおけるパイプ
にカムやジャーナル等を結合する際に、パイプとカムや
ジャーナル等の両方に結合力を高めるために、又カムの
回転防止或はカムの位相を決定するための凹凸の溝を設
け、更にこれらのパイプとカムやジャーナルとの間に緩
衝材を介在させて、パイプを拡管させて結合させること
により、カムやジャーナルの変形や破損がなくなり優れ
た結合が容易に得られる工業的効果は顕著である。
Effect according to the present invention. When connecting a cam, journal, etc. to a pipe in a hollow assembled camshaft, it is necessary to create unevenness to increase the bonding force between the pipe and the cam, journal, etc., and to prevent rotation of the cam or determine the phase of the cam. By providing grooves and interposing a buffer material between these pipes and the cams and journals, expanding the pipes and connecting them, the cams and journals will not be deformed or damaged, and an excellent connection can be easily obtained. The industrial effects are significant.

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

第1図 三角歯セレーション形状の凹凸を有するパイプ
の斜視図 第2図 三角歯セレーション形状の凹凸を有するカムの
斜視図 第3図 三角歯セレーション形状の凹凸状に形成された
緩衝材の斜視図 第4図 パイプにカムとジャーナルを結合した部分外観
概要図 第5図 第4図のA−A断面図 第6図 第5図のB部拡大図 第7図 第6図のC部拡大図 第8図 カムとジャーナルの定位置に三角歯セレーショ
ン状凹凸を有するパイプの外 観図 第9図 カムとジャーナルの定位置にローレット状凹凸
を有するパイプの外観図 1=パイプ      2:カム 3:ジャーナル 4:三角歯セレーション形状の凹凸 5:ローレット状凹凸 6:緩衝材
Fig. 1 A perspective view of a pipe having irregularities in the shape of triangular tooth serrations. Fig. 2 A perspective view of a cam having irregularities in the shape of triangular tooth serrations. Figure 3 A perspective view of a cushioning material formed with irregularities in the shape of triangular tooth serrations. Figure 4: A schematic partial external view of a pipe with a cam and journal connected to it Figure 5: A sectional view taken along line A-A in Figure 4 Figure 6: An enlarged view of part B in Figure 5 Figure 7: an enlarged view of part C in Figure 6 Figure 9 External view of a pipe with triangular tooth serrations in the fixed positions of the cam and journal Figure 9 External view of a pipe with knurling-shaped unevenness in the fixed positions of the cam and journal 1 = Pipe 2: Cam 3: Journal 4: Triangular Tooth serration-shaped unevenness 5: Knurling-like unevenness 6: Cushioning material

Claims (1)

【特許請求の範囲】[Claims] 鋼製パイプ(1)の外周面及び鋼製パイプ(1)の外周
面に嵌着する耐摩耗性材料からなるカム(2)やジャー
ナル(3)等の内周面に三角歯セレーション形状の凹凸
(4)或いはローレット状の凹凸(5)を形成すると共
に、鋼製パイプ(1)とカム(2)やジャーナル(3)
等の部材の間に前記三角歯セレーション形状の凹凸状或
いはリング状に形成された軟質材からなる緩衝材(6)
を介在させて、鋼製パイプ(1)を拡管することにより
鋼製パイプ(1)にカム(2)やジャーナル(3)等を
結合することを特徴とするる中空組立てカムシャフトの
製造方法。
Triangular tooth serration-shaped irregularities are formed on the outer circumferential surface of the steel pipe (1) and the inner circumferential surface of the cam (2), journal (3), etc. made of wear-resistant material that fits on the outer circumferential surface of the steel pipe (1). (4) Or, in addition to forming knurling-like unevenness (5), the steel pipe (1), cam (2), or journal (3)
A cushioning material (6) made of a soft material formed in the triangular tooth serration shape or ring shape between the members.
A method for producing a hollow assembled camshaft, which comprises connecting a cam (2), a journal (3), etc. to a steel pipe (1) by expanding the steel pipe (1) with the intervening.
JP27164285A 1985-12-04 1985-12-04 Production of hollow assembly cam shaft Pending JPS62130725A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27164285A JPS62130725A (en) 1985-12-04 1985-12-04 Production of hollow assembly cam shaft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27164285A JPS62130725A (en) 1985-12-04 1985-12-04 Production of hollow assembly cam shaft

Publications (1)

Publication Number Publication Date
JPS62130725A true JPS62130725A (en) 1987-06-13

Family

ID=17502895

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27164285A Pending JPS62130725A (en) 1985-12-04 1985-12-04 Production of hollow assembly cam shaft

Country Status (1)

Country Link
JP (1) JPS62130725A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5205187A (en) * 1987-05-12 1993-04-27 Gesenkschmiede Schneider Gmbh Hollow shaft
EP0745757A1 (en) * 1995-06-02 1996-12-04 Ford-Werke Aktiengesellschaft Assembled camshaft, particularly for internal combustion engines
FR3018105A1 (en) * 2014-03-01 2015-09-04 Ntn Snr Roulements METHOD FOR MANUFACTURING A CAMSHAFT EQUIPPED WITH AT LEAST ONE BEARING

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5205187A (en) * 1987-05-12 1993-04-27 Gesenkschmiede Schneider Gmbh Hollow shaft
EP0745757A1 (en) * 1995-06-02 1996-12-04 Ford-Werke Aktiengesellschaft Assembled camshaft, particularly for internal combustion engines
FR3018105A1 (en) * 2014-03-01 2015-09-04 Ntn Snr Roulements METHOD FOR MANUFACTURING A CAMSHAFT EQUIPPED WITH AT LEAST ONE BEARING

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