JPS63134806A - Manufacture of hollow cam shaft - Google Patents
Manufacture of hollow cam shaftInfo
- Publication number
- JPS63134806A JPS63134806A JP28281386A JP28281386A JPS63134806A JP S63134806 A JPS63134806 A JP S63134806A JP 28281386 A JP28281386 A JP 28281386A JP 28281386 A JP28281386 A JP 28281386A JP S63134806 A JPS63134806 A JP S63134806A
- Authority
- JP
- Japan
- Prior art keywords
- die
- pipe
- core bar
- drawn
- shaft
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 238000000641 cold extrusion Methods 0.000 claims abstract description 6
- 238000005304 joining Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 3
- 230000000763 evoking effect Effects 0.000 abstract 1
- 238000001125 extrusion Methods 0.000 description 7
- 238000012545 processing Methods 0.000 description 3
- 238000005219 brazing Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H53/00—Cams ; Non-rotary cams; or cam-followers, e.g. rollers for gearing mechanisms
- F16H53/02—Single-track cams for single-revolution cycles; Camshafts with such cams
- F16H53/025—Single-track cams for single-revolution cycles; Camshafts with such cams characterised by their construction, e.g. assembling or manufacturing features
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は主として内燃機関に用いられる組み立て式の中
空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 an assembled hollow camshaft mainly used in internal combustion engines.
［従来の技術］
引き央き中空パイプの外周にカム、ジャーナル等の組付
は部品を接合した軽量中空カムシャフトにおいて、ざら
にバルジ成形や絞り加工等の塑性変形をパイプに加える
ことによって中空部を拡張するか組付は部品の量を節約
するなどして、いっそうの軽但化が行なわれている。そ
れらの従来技術は下の如く例示される。[Conventional technology] The assembly of cams, journals, etc. on the outer periphery of a centered hollow pipe is done by applying plastic deformation such as rough bulge forming or drawing to the lightweight hollow camshaft in which the parts are joined. Efforts are being made to further simplify assembly by expanding the number of parts and reducing the amount of parts needed for assembly. These conventional techniques are illustrated below.
バルジ成形：特公昭４６−７６４４号
特開昭５２−５０４１０号
特開昭５８−９８６０８号
絞り加工 ：特ｌＰｎ昭５９−７６８５５＠特開昭６０
−１５２３３０号
一方、カムシ÷フトにおいては例えば組付は部品の周方
向位相決めのためにシャフトの外周に設ける軸方向溝（
例えば、特開昭５４−４１２６６号）ヤプーリと結合す
るためのシャフトの端部加工（例えば、実開昭５８−８
２４０３号、実開昭６０−５４７０４号、実開昭６０−
１５７９０２ ＠ ）なとも製造上の要点となっている
。Bulge forming: JP 46-7644, JP 52-50410, JP 58-98608 Drawing processing: JP 1987-76855 @ JP 60
-152330 On the other hand, in the case of a camshaft, for example, in assembly, an axial groove (
For example, JP-A No. 54-41266) Machining of the end of the shaft for connection with the Ya pulley (For example, JP-A No. 58-8
No. 2403, Utility Model No. 60-54704, Utility Model No. 60-
157902 @ ) is also a key point in manufacturing.
［発明が解決しようとする問題点］
また他方、中空カムシャフトの実用化に当っては低いコ
ストで製造することとシャフトの強度不足を克服するこ
とも課題となっているが、上記バルジ成形や絞り加工を
用いた従来技術のものによっては、これらの克服課題と
前述の溝加工や端部加工の要件を同時に解決することが
できなかった。[Problems to be Solved by the Invention] On the other hand, when putting hollow camshafts into practical use, there are also challenges to manufacturing them at low cost and overcoming the lack of shaft strength. Conventional techniques using drawing processes have not been able to simultaneously solve these problems and the requirements for groove processing and edge processing described above.
［問題点を解決するための手段］
本願発明者はダイスと心金を用いた冷間押出し加工によ
ってスチールパイプを塑性変形してシャフトとなすこと
によって上記問題点が同時に解決されることを見い出し
た。[Means for Solving the Problems] The inventor of the present invention has found that the above problems can be simultaneously solved by plastically deforming a steel pipe to form a shaft by cold extrusion using a die and a mandrel. .
すなわち本発明によれば、スチールパイプを端部の絞り
加工と冷間押出し加工により一方の端から他方の端へ向
【ブて外径が順次増加する多段形状であって、かつ少な
くとも１段の外周において組付は部品の周方向位相法め
のための軸方向に延びる溝を有する如く塑性変形したの
ら、組付は部品を冶金的手段によって該スチールパイプ
の外周に結合することからなる中空カムシャフトの製造
方法が提供される。That is, according to the present invention, a steel pipe is formed into a multi-stage shape in which the outer diameter increases sequentially from one end to the other by drawing and cold extruding the ends, and at least one stage. At the outer periphery, the assembly consists of joining the parts to the outer periphery of the steel pipe by metallurgical means, after being plastically deformed so as to have axially extending grooves for circumferential phasing of the parts. A method of manufacturing a camshaft is provided.
なお、ここで冶金的手段による結合とは、焼結拡散接合
、ろう付け、焼ばめ、溶接等をいう。Note that the term "bonding by metallurgical means" as used herein refers to sintering diffusion bonding, brazing, shrink fitting, welding, and the like.
［実施例］
本発明の方法によって製造されるカムシャフトはエンジ
ンの動弁系機構によって種々のものが考えられるが、以
下に２つの実施例を示す。[Example] Although various camshafts can be manufactured by the method of the present invention depending on the valve train mechanism of the engine, two examples will be shown below.
実施例１（第１図〜第１２図）
ｉ）第１図に示す如く、鋼製の引扱き中空パイプ１の一
つの端部に絞り部１１を形成する。Example 1 (FIGS. 1 to 12) i) As shown in FIG. 1, a constricted portion 11 is formed at one end of a handling hollow pipe 1 made of steel.
ｉｉ）第２図に示す如く、４段の外径からなる円を１状
の心金２をパイプ１に挿入した後、ダイス３ａと厚板の
プレスＰを主要部とする冷間押出し成形機にセラ１〜す
る。このとき心金２の両端外周とパイプ１の両端内周と
は密接して固定されている。ii) As shown in Fig. 2, after inserting a mandrel 2 in the shape of a circle with four stages of outer diameter into the pipe 1, a cold extrusion molding machine whose main parts are a die 3a and a thick plate press P is used. Sera 1 ~. At this time, the outer periphery of both ends of the mandrel 2 and the inner periphery of both ends of the pipe 1 are closely fixed.
絞り部１１は押し出しの際、治具によってクランプする
ための口金となり、またパイプ内周の傾斜部１２は、こ
の部分か心金外周の傾斜部２１に当接してパイプ１と心
金２の軸方向の相対的位置が固定される（心金２がパイ
プ１よりも前方に飛び出さない）ための押さえとなる。The constricted part 11 serves as a mouthpiece for clamping with a jig during extrusion, and the sloped part 12 on the inner circumference of the pipe comes into contact with the sloped part 21 on the outer circumference of the mandrel, so that the axis of the pipe 1 and the mandrel 2 is fixed. It serves as a presser to fix the relative position in the direction (so that the mandrel 2 does not protrude ahead of the pipe 1).
一方、ダイス３ａは正面から見ると第３図の如き縦断面
を有し、挿通孔の４個所にＶ字状突起３１が形成されて
いる。On the other hand, when viewed from the front, the die 3a has a vertical cross section as shown in FIG. 3, and V-shaped protrusions 31 are formed at four locations in the insertion hole.
１ｉｉ）プレスＰによってパイプ１と心金２を一体的に
後方から押し出すことによって第４図→第５図に示す如
くダイス３ａに挿通し、第５図の位置で止める。（１回
目の押出し）
ｉｖ）ダイス３ａよりも孔径の大きいダイス３ｂ（、縦
断正面図を第８図に示す）に第６図→第７図に示す如く
挿通して投き出す。（２回目の押出し）■）心金２をパ
イプ１から扱き取り、第７図の点線の位置で口金部１１
を切除する。1ii) The pipe 1 and the mandrel 2 are pushed out integrally from the rear using the press P, and are inserted into the die 3a as shown in FIGS. 4 and 5, and stopped at the position shown in FIG. (First extrusion) iv) As shown in FIGS. 6 and 7, the product is inserted into a die 3b (the vertical front view of which is shown in FIG. 8) having a hole diameter larger than that of the die 3a, and thrown out. (Second extrusion) ■) Handle the mandrel 2 from the pipe 1, and place it at the nozzle part 11 at the position indicated by the dotted line in Fig. 7.
Excise.
以上により、ダイス３ａの孔形状に沿って軸方向の４つ
のＶ溝４を有する小径部１４とダイス３ｂの孔形状に沿
った大径部１３からなる２段の外周面と、心金２の外形
に沿った内周面からなるシャツ］へ１が形成された。ま
たこれは２個所の厚肉部５．５を有している。As described above, the outer peripheral surface of the mandrel 2 has a two-stage outer peripheral surface consisting of a small diameter part 14 having four axial V grooves 4 along the hole shape of the die 3a and a large diameter part 13 along the hole shape of the die 3b. 1 was formed on a shirt consisting of an inner circumferential surface along the outer shape. It also has two thickened portions 5.5.
ｖｉ）第９図に示す如く、シャフトの左端部の開口にプ
ーリと結合させるためのエンドピース７をろう材と共に
挿入してこの開口を塞ぎ、またシャフトの２個所の厚肉
部５に焼結合金の圧粉体からなるジャーナルピース９と
、それらの間の小径部１４に同じく圧粉体の４個のカム
ピース１Ｑを組み付けた後、炉内にでろう接合及び焼結
結合する。vi) As shown in FIG. 9, the end piece 7 for coupling with the pulley is inserted into the opening at the left end of the shaft together with a brazing material to close this opening, and the end piece 7 is sintered to the two thick parts 5 of the shaft. After assembling the journal piece 9 made of a gold compact and the four cam pieces 1Q, also made of a compact, to the small diameter portion 14 between them, they are brazed and sintered in a furnace.
ｖｉｉ）同じく第９図に示す如く、シャフトのも端部の
開口はその内径をネジ切りした俊、ドライシール６で塞
ぐ。また左端部においてはエンドピース７にネジ切りを
し、ピン孔８を設けて中空カムシャフトを完成した。第
９図におけるＡ−Ａ線、Ｂ−Ｂ線、Ｃ−Ｃ線における縦
断正面図を各々、第１０図、第１１図、第１２図に示す
。vii) As also shown in FIG. 9, the opening at the end of the shaft is closed with a dry seal 6 whose inner diameter is threaded. At the left end, the end piece 7 was threaded and a pin hole 8 was provided to complete the hollow camshaft. 10, 11, and 12 respectively show longitudinal sectional front views taken along lines AA, BB, and C-C in FIG. 9.
実施例２（第１３図〜第２４図）
ｉ）第１３図に示す如く、鋼製の引扱き中空パイプ１の
一つの端部に絞り部１１を形成する。Example 2 (FIGS. 13 to 24) i) As shown in FIG. 13, a constricted portion 11 is formed at one end of a handling hollow pipe 1 made of steel.
ｉｉ）第１４図に示す如く、３段の外径からなる円柱状
の心金２をパイプ１に挿入した後、ダイス３Ｃを有する
冷間押出し成形機にセットする。第１実施例と同様に絞
り部１１は口金部となり、またパイプ内周の傾斜部１２
に心金外周の傾斜部２１が押し出しの際に当接する。ダ
イス３Ｃは正面から見ると第１５図の如き縦断面を有す
る。ii) As shown in FIG. 14, a cylindrical mandrel 2 having three outer diameters is inserted into the pipe 1, and then set in a cold extrusion molding machine having a die 3C. As in the first embodiment, the constricted part 11 becomes a mouthpiece, and the inclined part 12 on the inner circumference of the pipe
The inclined portion 21 of the outer periphery of the mandrel comes into contact with the mandrel during extrusion. The die 3C has a vertical cross section as shown in FIG. 15 when viewed from the front.
１ｉｉ）図示しないプレスによってパイプ１と心金２を
一体向に後方から押し出すことによってダイス３Ｃに挿
通し、第１６図の位置で止める。（１回目の押出し）
罰）第１８図の縦断面の如くダイス３Ｃよりも孔径が大
きく、挿通孔の４個所にＶ字状突起３１が形成されたダ
イス３ｄに第１図〜第１２図→第２０図に示す如く挿通
し、第２０図の位置で止める。これによって軸方向の４
つのＶ溝４が形成される。（２回目の押出し）
■）ダイス３ｄよりもざらに孔径の大ぎいダイス３ｅ（
縦断正面図を第２２図に示す）に第２１図→第２３図に
示す如く挿通して汰き出した後、心金２を恢き取る。（
３回目の押出し）
以上により、ダイス３Ｃ１３ｄ、３ｅの孔形状に沿った
３段の外周面と、心金２の外径に沿った内周面からなる
シャフト１が形成された。これは両端に厚肉部５．５と
その間の薄肉部１６を有している。1ii) The pipe 1 and the mandrel 2 are pushed out in one direction from the rear using a press (not shown), inserted into the die 3C, and stopped at the position shown in FIG. 16. (First extrusion) Punishment) As shown in the longitudinal section of Fig. 18, the die 3d, which has a larger hole diameter than the die 3C and has V-shaped protrusions 31 formed at four insertion holes, is used in Figs. 1 to 12 → Insert it as shown in Fig. 20 and stop at the position shown in Fig. 20. This results in 4 axial
Two V-grooves 4 are formed. (Second extrusion) ■) Die 3e (with a roughly larger hole diameter than die 3d)
22 (a longitudinal sectional front view is shown in FIG. 22), the core metal 2 is scooped out after being inserted and scooped out as shown in FIG. 21→FIG. 23. (
Third Extrusion) Through the above steps, the shaft 1 was formed, which consisted of three stages of outer circumferential surfaces along the hole shapes of the dies 3C13d and 3e, and an inner circumferential surface along the outer diameter of the mandrel 2. It has a thickened section 5.5 at each end and a thinned section 16 between.
ｖｉ）第２４図に示す如く、シャフトの左側の厚肉部５
に焼結合金の圧粉体からなるジャーナルピース９と、薄
肉部１６に同じく圧粉体の４個のカムピース１０を組み
付けた後、炉内にて焼結結合させる。vi) As shown in FIG. 24, the thick wall portion 5 on the left side of the shaft
After assembling a journal piece 9 made of a green compact of sintered alloy and four cam pieces 10 also made of green compacts to the thin wall portion 16, they are sintered and bonded in a furnace.
ｖｉｉ）同じく第２４図に示す如く、シャフトのも端部
の開口はプラグ６１を圧入することによって塞ぐ。一方
、左端部の間口はプーリと接合するためにネジ切りをし
、キー溝８１を設けて中空カムシャフトを完成した。右
側の厚肉部５（大径部９１）は直接ジャーナルとして用
いる。vii) As also shown in FIG. 24, the opening at the end of the shaft is closed by press-fitting a plug 61. On the other hand, the left end opening was threaded to connect with the pulley, and a keyway 81 was provided to complete the hollow camshaft. The thick portion 5 (large diameter portion 91) on the right side is directly used as a journal.
［発明の効果］゛
本発明は下記の効果を奏する。すなわち、■組付は部品
の周方向位相法めのためのシャフト外周の軸方向溝の形
成と、組付は部品を冶金的に接合させるために必要なシ
ャフト外周面の平滑化を高い精度で行なうことができる
。[Effects of the Invention] The present invention has the following effects. In other words, ■Assembling involves forming axial grooves on the outer circumference of the shaft to align the circumferential phase of the parts, and assembling involves smoothing the outer circumferential surface of the shaft with high precision, which is necessary to join the parts metallurgically. can be done.
■ネジ切りなどの後加工が必要なシャフト外周やジャー
ナル組み付は部分などを厚肉にしてシャフトの強度を高
くすることができる。■It is possible to increase the strength of the shaft by increasing the thickness of parts such as the shaft outer circumference and journal assembly that require post-processing such as thread cutting.
■以上■■の作業を同時に行なうことかできるので、低
いコストで中空カムシャフトを製造することができる。Since the above operations (■) and (■■) can be performed simultaneously, hollow camshafts can be manufactured at low cost.
第１図〜第１２図は本発明の製造工程の第１実施例を示
す断面図であり、そのうち第３図と第８図はダイスの縦
断正面図である。また第９図は中空カムシャフトの完成
体を示す。
第１３図〜第２４図は本発明の製造工程の第２実施例を
示す断面図であり、そのうち第１５図、第１８図、第２
２図はダイスの縦断正面図である。
また第２４図は中空カムシャフトの完成体を示す。
符号の説明
１・・・中空パイプ（シャフト）、２・・・心金、３ａ
。
３ｂ、３Ｃ１３ｄ、３ ｅ−・・ダイス、４・・・軸方
向溝、５・・・厚肉部、６・・・ドライシール、６１・
・・プラグ、７・・・エンドピース、８・・・ピン孔、
８１・・・キー溝、９・・・ジャーナルピース、１０・
・・カムピース。FIGS. 1 to 12 are sectional views showing a first embodiment of the manufacturing process of the present invention, and FIGS. 3 and 8 are longitudinal sectional front views of the die. FIG. 9 shows the completed hollow camshaft. 13 to 24 are cross-sectional views showing a second embodiment of the manufacturing process of the present invention, among which FIGS. 15, 18, and 2
Figure 2 is a longitudinal sectional front view of the die. Moreover, FIG. 24 shows the completed hollow camshaft. Explanation of symbols 1... Hollow pipe (shaft), 2... Mandrel, 3a
. 3b, 3C13d, 3 e--Dice, 4... Axial groove, 5... Thick wall part, 6... Dry seal, 61...
... Plug, 7... End piece, 8... Pin hole,
81...Keyway, 9...Journal piece, 10.
...Come Piece.
Claims (1)
り一方の端から他方の端へ向けて外径が順次増加する多
段形状であって、かつ少なくとも１段の外周において組
付け部品の周方向位相決めのための軸方向に延びる溝を
有する如く塑性変形したのち、組付け部品を冶金的手段
によって該スチールパイプの外周に結合することからな
る中空カムシャフトの製造方法。The steel pipe has a multi-stage shape in which the outer diameter increases sequentially from one end to the other by end drawing and cold extrusion, and the circumferential phase of the assembled parts on the outer periphery of at least one stage. 1. A method of manufacturing a hollow camshaft, which comprises joining an assembly part to the outer periphery of the steel pipe by metallurgical means after it has been plastically deformed to have a defining axially extending groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28281386A JPS63134806A (en) | 1986-11-27 | 1986-11-27 | Manufacture of hollow cam shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28281386A JPS63134806A (en) | 1986-11-27 | 1986-11-27 | Manufacture of hollow cam shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63134806A true JPS63134806A (en) | 1988-06-07 |
Family
ID=17657416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28281386A Pending JPS63134806A (en) | 1986-11-27 | 1986-11-27 | Manufacture of hollow cam shaft |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63134806A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100397463B1 (en) * | 2000-09-05 | 2003-09-13 | 이말용 | The method of processing the uneven surface of ornamental accessary's making |
| JP2018128000A (en) * | 2017-02-10 | 2018-08-16 | 三菱自動車工業株式会社 | Hollow cam shaft |
| JP2019167886A (en) * | 2018-03-23 | 2019-10-03 | 株式会社Ｓｕｂａｒｕ | Cam shaft |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49130359A (en) * | 1973-04-09 | 1974-12-13 | ||
| JPS5441266A (en) * | 1977-09-08 | 1979-04-02 | Toyota Motor Corp | Method and apparatus for manufacture of cam shaft |
-
1986
- 1986-11-27 JP JP28281386A patent/JPS63134806A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49130359A (en) * | 1973-04-09 | 1974-12-13 | ||
| JPS5441266A (en) * | 1977-09-08 | 1979-04-02 | Toyota Motor Corp | Method and apparatus for manufacture of cam shaft |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100397463B1 (en) * | 2000-09-05 | 2003-09-13 | 이말용 | The method of processing the uneven surface of ornamental accessary's making |
| JP2018128000A (en) * | 2017-02-10 | 2018-08-16 | 三菱自動車工業株式会社 | Hollow cam shaft |
| JP2019167886A (en) * | 2018-03-23 | 2019-10-03 | 株式会社Ｓｕｂａｒｕ | Cam shaft |
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