JPS629728A - Manufacture of cam shaft - Google Patents
Manufacture of cam shaftInfo
- Publication number
- JPS629728A JPS629728A JP14839485A JP14839485A JPS629728A JP S629728 A JPS629728 A JP S629728A JP 14839485 A JP14839485 A JP 14839485A JP 14839485 A JP14839485 A JP 14839485A JP S629728 A JPS629728 A JP S629728A
- Authority
- JP
- Japan
- Prior art keywords
- cam
- pipe material
- cam piece
- piece
- working
- 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
Links
Landscapes
- Gears, Cams (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、エンジンの吸排気弁を開閉するカムシャフト
の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of manufacturing a camshaft that opens and closes intake and exhaust valves of an engine.
（従来技術とその問題点〕
エンジンのシリンダの吸排気を行なわせる吸排気弁をタ
イミングを定めて開閉するカムは、クランクシャフトに
同期連動して回転するシャフト上に設けられる。(Prior Art and its Problems) A cam that opens and closes an intake and exhaust valve at a set timing to intake and exhaust air from an engine cylinder is provided on a shaft that rotates in synchronization with a crankshaft.
旧来のカムシャフトは、！ｌ’ｊＬ造、鋳造等によって
シャフトにカムを一体成形し、機械加工により後加工を
施してカム面を形成するようになされていたが、これに
よると、カムシャフトの全重量が大きくなり、車輌の軽
量化に適なぬものとなった。The old camshaft is! The cam was integrally formed on the shaft by l'jL construction, casting, etc., and the cam surface was formed by post-processing by machining, but this increased the total weight of the camshaft and made it difficult for the vehicle This made it unsuitable for weight reduction.
そこで、近時はカムシャフトに中空バイブ材を用い、こ
のパイプ材に焼結カムピースを固定することによってカ
ムシャフトの軽石化を図るようにしたものがある。Therefore, in recent years, a hollow vibrating material has been used for the camshaft, and a sintered cam piece is fixed to this pipe material, so that the camshaft can be made of pumice.
ところで上記パイプ材に焼結カムピースを固着するには
、第２図に一例を示すように、焼結カムピース１のシャ
フト嵌合孔１Ａの内周面に凹部１Ｂを設けておき、この
シャフト嵌合孔１Ａにパイプ材２を挿入してバルジ加工
等によりパイプ材２を一部変形させ、前記四部１Ｂ内に
圧入さぼることで一体化されるようになされている。By the way, in order to fix the sintered cam piece to the pipe material, as shown in an example in FIG. The pipe material 2 is inserted into the hole 1A, the pipe material 2 is partially deformed by bulge processing, etc., and the pipe material 2 is press-fitted into the four parts 1B to be integrated.
しかるにこの種のカムは、第２図にも示しているように
、外周の一部が突カム状とされ、他の部分は薄肉とされ
た形状である。そのため前記凹部１Ｂは突カム部１Ｃと
対応する位置のバイブ嵌合孔１Ａの内面に形成するよう
にしているが、焼結カムピース１を固着するためにパイ
プ材２に内圧を加えると前記突カム部１Ｃ以外の箇所で
割れが生じやすいという問題がある。However, as shown in FIG. 2, this type of cam has a protruding cam shape on a portion of its outer periphery and a thin wall on the other portion. Therefore, the recess 1B is formed on the inner surface of the vibrator fitting hole 1A at a position corresponding to the protruding cam part 1C, but when internal pressure is applied to the pipe material 2 to fix the sintered cam piece 1, the protruding cam There is a problem in that cracks are likely to occur at locations other than the portion 1C.
そのため焼結カムピース１を予じめ肉厚に形成しておき
、パイプ材２に固着したのちにカム面を切削して所定の
形状に後加工する必要があり、しかもカム面の加工はカ
ムピースをシャフトに固着してから行なう必要があるた
め加工が容易でなく、カムシャフトのコストが高くなる
という欠点があった。Therefore, it is necessary to form the sintered cam piece 1 thick in advance, and after fixing it to the pipe material 2, cut the cam surface and post-process it into a predetermined shape. Since it is necessary to fix the camshaft to the shaft, machining is not easy and the cost of the camshaft is high.
本発明は上記従来技術の欠点に着目し、これを改善する
ことを目的としてなされたもので、シャフトにパイプ材
を用いカムシャフトを高能率に生産することができると
ともに、カムピースの割れや後加工の必要をなくし、安
価に得ることができるカムシャフトの製造方法を提供し
ようとするものである。The present invention has focused on the above-mentioned drawbacks of the prior art, and has been made with the aim of improving these.It is possible to produce camshafts with high efficiency by using a pipe material for the shaft, and also prevent cracking of cam pieces and post-processing. The present invention aims to provide a method for manufacturing a camshaft that eliminates the need for camshafts and that can be obtained at low cost.
上記目的を達成するため、本発明によるカムシャフトの
製造方法は、鋼材または焼結材によりカムピースを形成
し、このカムピースのカム面に焼入れおよび研磨等の表
面処理を施したのちパイプ材に外嵌し、このパイプ材を
その内面からのかしめによりカムピースをパイプ材の所
定位置に固着してカムシャフトを形成し、カムピースの
後加工を不要としたことを特徴とするものである。In order to achieve the above object, the method for manufacturing a camshaft according to the present invention involves forming a cam piece from steel or sintered material, subjecting the cam surface of the cam piece to surface treatment such as hardening and polishing, and then fitting it onto a pipe material. However, the cam piece is fixed to a predetermined position of the pipe material by caulking the pipe material from its inner surface to form a camshaft, thereby eliminating the need for post-processing of the cam piece.
（発明の実施例〕
以下、本発明を第１図に示す実施例を参照し、第２図と
共通する部分には同一符号を用いて説明する。(Embodiments of the Invention) The present invention will be described below with reference to the embodiment shown in FIG. 1, using the same reference numerals for parts common to those in FIG.
カムピース３は、鋼材により鍛造で形成され、そのカム
面に高周波焼入れおよび研磨等の表面処理を施して完成
品としたのちパイプ材２に外嵌し、パイプ材２を内面側
から加圧してパイプ材２の外面をカムピース３のバイブ
嵌合孔３Ａの内周面の四部３Ｂに圧接することにより一
体化される。この場合、第２図に示した従来の固定手段
によるほか、カムピース３のバイブ嵌合孔３Ａの内周面
に、Ｏ−レット状、螺旋状、軸方向凹凸条等の凹凸加工
を施しておくことによりパイプ材２とのかしめつけの強
度を高めることができる。また、かしめ手段については
、パイプ材２の内部への芯金の圧入、バルジ等、適宜な
加圧手段を採用することができる。The cam piece 3 is formed by forging from steel, and the cam surface is subjected to surface treatments such as induction hardening and polishing to form a finished product.The cam piece 3 is fitted onto the outside of the pipe material 2, and the pipe material 2 is pressurized from the inner side to form a pipe. The material 2 is integrated by pressing the outer surface of the material 2 against the four portions 3B of the inner peripheral surface of the vibrator fitting hole 3A of the cam piece 3. In this case, in addition to using the conventional fixing means shown in FIG. 2, the inner circumferential surface of the vibrator fitting hole 3A of the cam piece 3 is processed with unevenness such as an O-let shape, a spiral shape, and an axial unevenness strip. By doing so, the strength of caulking with the pipe material 2 can be increased. Further, as for the caulking means, any appropriate pressurizing means such as press-fitting a core metal into the inside of the pipe material 2, a bulge, etc. can be adopted.
したがって本発明によるカムシャフトの！ｌｌｌｌ決方
法れば、カムピース３は単品の段階でカム面形状、カム
面の焼入れ、研磨等の加工を施すことができるので、多
数のカムピース３をまとめて加工することが可能となり
、しかもパイプ材２に固着する前段階での加工であるか
らその作業も容易になり、カムシャフトを安価に得るこ
とができる効果がある。Therefore the camshaft according to the invention! If the cam piece 3 is decided, the cam surface shape, cam surface hardening, polishing, etc. can be applied to the cam piece 3 as a single item, so it is possible to process a large number of cam pieces 3 at once, and the pipe material can also be processed. Since the machining is performed before fixing the camshaft to the camshaft 2, the work is easy and the camshaft can be obtained at a low cost.
以上説明したように、本発明によるカムシャフトの製造
方法は、鋼材または焼結材によりカムピースを形成し、
このカムピースのカム面に焼入れおよび研磨等の表面処
理を施したのちパイプ材の所定の位置に外嵌し、このパ
イプ材をその内面からのかしめ加工によりカムピースを
パイプ材の所定位置に固着してカムシャフトを形成する
ようにしたので、カムピースの後加工の必要がなく、カ
ムピースの加工および表面処理をまとめて行なうことが
でき、作業性を著しく高めることができるとともに所定
の精度に加工したカムピースをかしめつければ直ちに製
品とすることができるので製造能率を高め、生産性に優
れ、安価に提供することができるなどの種々の効果があ
る。As explained above, the method for manufacturing a camshaft according to the present invention includes forming a cam piece from a steel material or a sintered material,
After surface treatment such as hardening and polishing is applied to the cam surface of this cam piece, it is fitted onto the pipe material at a predetermined position, and the cam piece is fixed at a predetermined position on the pipe material by caulking the pipe material from its inner surface. Since the camshaft is formed, there is no need for post-processing of the cam piece, and the processing and surface treatment of the cam piece can be carried out at the same time.This greatly improves work efficiency and allows the cam piece to be machined to the specified accuracy. Since it can be made into a product immediately after caulking, it has various effects such as increasing manufacturing efficiency, being superior in productivity, and being able to be provided at low cost.
第１図は本発明により形成されたカムシャフトの断面図
、第２図は従来のカムシャフトを示す分解斜視図である
。
２・・・パイプ材、３・・・カムピース、３Δ・・・バ
イブ嵌合孔、３Ｂ・・・凹凸加工。
出願人代理人 佐 藤 −雄
奈１図
Ｃ
箒２図
手続補正書 ８
昭和６０年８月グ日
特許庁長官 宇賀道部 殿 苓【
１ 事件の表示 は
昭和６０年 特許願 第１４８３９４号 と２ 発
明の名称
カムシレフトの製造方法
３ 補正をする者
事件との関係 特許出願人
深 澤 仁４ 代
理 人
明細書（７） Ｉ”ｖ＞０１（７’）ｉｌｉ１７：ｒｆ
ｆｃＪＩＩ＋１１ （７）Ｒ１−補正の内容
本願用ａＳの第６頁第１２行「できるなどの１下記の通
り訂正する。
できる。さらにカムピースの孔端面も予じめ１ているた
め、かしめ時に割れることがないな′の」FIG. 1 is a sectional view of a camshaft formed according to the present invention, and FIG. 2 is an exploded perspective view of a conventional camshaft. 2... Pipe material, 3... Cam piece, 3Δ... Vibe fitting hole, 3B... Uneven processing. Applicant's agent Sato-Yuna 1 Figure C Houki 2 Figure Procedural amendment 8 August 1985 Commissioner of the Patent Office Michibe Uga Tono Rei Invention name Kamushi Left manufacturing method 3 Relationship with the case of the person making the amendment Patent applicant Hitoshi Fukasawa 4th generation
Personal statement (7) I"v>01(7') ili17: rf
fcJII+11 (7) R1-Contents of correction ``1'' on page 6, line 12 of the aS for this application ``1'' is corrected as follows. Yes. Furthermore, the hole end surface of the cam piece is also 1 in advance, so it may break during caulking. There's no 'no.'
Claims (1)
ピースのカム面に焼入れおよび研磨等の表面処理を施し
たのちパイプ材の所定の位置に外嵌し、このパイプ材を
その内面からのかしめ加工によりカムピースをパイプ材
の所定位置に固着してカムシャフトを形成し、カムピー
スの後加工を不要としたことを特徴とするカムシャフト
の製造方法。A cam piece is formed from steel material or sintered material, and the cam surface of this cam piece is subjected to surface treatments such as hardening and polishing, and then fitted onto the pipe material at a predetermined position, and the pipe material is caulked from the inside. A method for manufacturing a camshaft, characterized in that the camshaft is formed by fixing the cam piece to a predetermined position on a pipe material, thereby eliminating the need for post-processing of the cam piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14839485A JPS629728A (en) | 1985-07-08 | 1985-07-08 | Manufacture of cam shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14839485A JPS629728A (en) | 1985-07-08 | 1985-07-08 | Manufacture of cam shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS629728A true JPS629728A (en) | 1987-01-17 |
Family
ID=15451795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14839485A Pending JPS629728A (en) | 1985-07-08 | 1985-07-08 | Manufacture of cam shaft |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS629728A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6264428A (en) * | 1985-09-13 | 1987-03-23 | Musashi Seimitsu Ind Co Ltd | Manufacture of assembly cam shaft |
| JP2010531234A (en) * | 2007-06-28 | 2010-09-24 | ブルーデラー アーゲー | This application claims the priority of European Patent Application No. 0701661 filed on June 28, 2007, and thus incorporates the entire disclosure thereof. |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56506A (en) * | 1979-06-14 | 1981-01-07 | Nissan Motor Co Ltd | Valve lift controlling device for internal-combustion engine |
-
1985
- 1985-07-08 JP JP14839485A patent/JPS629728A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56506A (en) * | 1979-06-14 | 1981-01-07 | Nissan Motor Co Ltd | Valve lift controlling device for internal-combustion engine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6264428A (en) * | 1985-09-13 | 1987-03-23 | Musashi Seimitsu Ind Co Ltd | Manufacture of assembly cam shaft |
| JP2010531234A (en) * | 2007-06-28 | 2010-09-24 | ブルーデラー アーゲー | This application claims the priority of European Patent Application No. 0701661 filed on June 28, 2007, and thus incorporates the entire disclosure thereof. |
| US8739595B2 (en) | 2007-06-28 | 2014-06-03 | Bruderer Ag | Punching press |
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