JPH03181652A - Manufacture of cam shaft - Google Patents
Manufacture of cam shaftInfo
- Publication number
- JPH03181652A JPH03181652A JP1321851A JP32185189A JPH03181652A JP H03181652 A JPH03181652 A JP H03181652A JP 1321851 A JP1321851 A JP 1321851A JP 32185189 A JP32185189 A JP 32185189A JP H03181652 A JPH03181652 A JP H03181652A
- Authority
- JP
- Japan
- Prior art keywords
- shaft member
- weight
- journal
- cam
- 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
- 238000003466 welding Methods 0.000 claims abstract description 18
- 238000005452 bending Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 238000005255 carburizing Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 235000019353 potassium silicate Nutrition 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明はカムシャフトの製造方法に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a method for manufacturing a camshaft.
（従来の技術）
エンジンの多弁化等に伴い、複雑な形状のカムシャフト
が要求されるようになってきたため、カムシャフトの製
造方法としては、従来から知られている鍛造若しくは鋳
造により得たカムシャフト素材を機械加工する方法に代
えて、実開昭４８９８０５号公報に示されるように、中
空部を有するカム部材及びジャーナル部材と、シャフト
部材とを各々別個に設けておき、カム部材及びジャーナ
ル部材の中空部にシャフト部材を嵌入した後、カム部材
及びジャーナル部材とシャフト部材とを各々溶接する方
法が提案されている。(Prior art) As engines have become more multi-valve, camshafts with complex shapes have become required.As a method of manufacturing camshafts, cams obtained by forging or casting, which have been known in the past, have become necessary. Instead of machining the shaft material, as shown in Japanese Utility Model Application Publication No. 489805, a cam member and a journal member each having a hollow portion and a shaft member are provided separately, and the cam member and the journal member are separately provided. A method has been proposed in which the cam member and journal member are welded to each other after the shaft member is fitted into the hollow portion of the shaft member.
（発明が解決しようとする課題）
ところが、カム部材及びジャーナル部材とシャフト部材
とを溶接する際、カム部材及びジャーナル部材の中空部
に沿って周方向に溶接していくと、シャフト部材が撓み
変形するという問題がある。(Problem to be Solved by the Invention) However, when welding the cam member and the journal member to the shaft member, if welding is performed in the circumferential direction along the hollow portions of the cam member and the journal member, the shaft member will be bent and deformed. There is a problem with doing so.
つまり、溶接開始点から周方向へ１８０度移動した部位
が収縮して縮むため、シャフト部材が溶接部でへの字状
に曲がるという問題がある。特に、近時におけるエンジ
ンの軽量化の要請からシャフト部材としてバイブを用い
る場合には、シャフト部材の変形は顕著である。In other words, since the portion that has moved 180 degrees in the circumferential direction from the welding start point contracts and shrinks, there is a problem in that the shaft member is bent in a U-shape at the welding portion. Particularly, when a vibrator is used as a shaft member due to the recent demand for weight reduction of engines, deformation of the shaft member is significant.
また、浸炭焼入れ等の表面硬化処理したカム部材及びジ
ャーナル部材をシャフト部材に溶接する場合、シャフト
部材が変形すると、カム部材及びジャーナル部材の表面
に対する研削代が大きくなって表面硬化層が残らなかっ
たり、或いは表面硬化層を残そうとすると未研削部が生
じて所定の形状が得られないという問題がある。Additionally, when welding a cam member and journal member that have been surface hardened by carburizing and quenching to a shaft member, if the shaft member deforms, the grinding allowance for the surface of the cam member and journal member becomes large, and the hardened surface layer may not remain. Alternatively, if an attempt is made to leave the surface hardened layer, there is a problem that unground portions are generated and a predetermined shape cannot be obtained.
上記に鑑みて、本発明は、カム部材及びジャーナル部材
とシャフト部材とを各々溶接してカムシャフトを製造す
る方法であるにも拘らず、溶接によってシャフト部材が
曲がるのを防止することを目的とする。In view of the above, although the present invention is a method for manufacturing a camshaft by welding a cam member, a journal member, and a shaft member, it is an object of the present invention to prevent the shaft member from being bent due to welding. do.
（課題を解決するための手段）
上記の目的を達成するため、本発明は、シャフト部材に
軸方向の引張力を付与して該シャフト部材を軸方向に拘
束しておき、その状態で溶接するものである。(Means for Solving the Problems) In order to achieve the above object, the present invention applies an axial tensile force to a shaft member to restrain the shaft member in the axial direction, and welds the shaft member in that state. It is something.
具体的に本発明が講じた解決手段は、カム部材及びジャ
ーナル部材が嵌装されたシャフト部材を垂直回転軸を有
する回転駆動部に吊り下げると共に、該シャフト部材の
下端部に錘を取り付け、その後、上記回転駆動部により
上記シャフト部材を回転させながら上記カム部材及びジ
ャーナル部材とシャフト部材とを各々溶接する構成とす
るものである。Specifically, the solution taken by the present invention is to suspend a shaft member fitted with a cam member and a journal member from a rotary drive unit having a vertical rotation axis, and attach a weight to the lower end of the shaft member. The shaft member is welded to the cam member and the journal member while the shaft member is rotated by the rotation drive unit.
（作用）
上記の構成により、シャフト部材をその下端部に錘を取
り付けた状態で回転させながら、カム部材及びジャーナ
ル部材とシャフト部材とを溶接するため、シャフト部材
は軸方向に拘束された状態で溶接される。(Function) With the above configuration, the cam member and journal member are welded to the shaft member while rotating the shaft member with a weight attached to its lower end, so the shaft member is restrained in the axial direction. Welded.
また、シャフト部材は引っ張られた状態で溶接されてい
るため、溶接後に錘を取り除いて引張応力を除去すると
溶接部に圧縮残留応力が生成される。Further, since the shaft member is welded under tension, if the weight is removed after welding to remove the tensile stress, compressive residual stress will be generated in the welded portion.
（実施例） 以下、本発明の実施例を第１図に基づいて説明する。(Example) Embodiments of the present invention will be described below with reference to FIG.
まず、例えばＪ Ｉｓ−ＳＣｌ５−５Ｃよりなる素材を
所定形状に機械加工してカム部材１及びジャーナル部材
２を製作する一方、例えばＪＩＳ−ＳＴＫＭ１３Ａより
なる素材を所定形状に機械加工してシャフト部材３を製
作する。First, the cam member 1 and the journal member 2 are manufactured by machining a material made of, for example, JIS-SCl5-5C into a predetermined shape, while the shaft member 3 is manufactured by machining a material made of, for example, JIS-STKM13A into a predetermined shape. Manufacture.
次に、カム部材１及びジャーナル部材２の溶接割れを防
止するため、カム部材１及びジャーナル部材２における
溶接箇所に防炭処理を施した後、該カム部材１及びジャ
ーナル部材１に浸炭焼入れ及び焼戻しを行なう。尚、防
炭処理としては、溶接箇所に防炭材としての水ガラスを
塗布しておき、浸炭焼入れ後にワイヤブラシ等で水ガラ
スを除去する方法、或いは溶接箇所にニッケルめっき又
は銅めっきをして溶接箇所をマスキングしておく方法等
を適用できる。Next, in order to prevent weld cracks between the cam member 1 and the journal member 2, the welded parts of the cam member 1 and the journal member 2 are subjected to carburizing treatment, and then the cam member 1 and the journal member 1 are carburized and quenched and tempered. Do this. Carburizing treatment can be done by applying water glass as a carburizing material to the welding area and removing the water glass with a wire brush after carburizing and quenching, or by applying nickel plating or copper plating to the welding area. A method such as masking the welding location can be applied.
次に、シャフト部材３にカム部材１及びジャーナル部材
２を嵌装した後、カム部材１及びジャーナル部材２を軸
方向の所定位置にセットしてカムシャフト素材を得る。Next, after fitting the cam member 1 and the journal member 2 to the shaft member 3, the cam member 1 and the journal member 2 are set at predetermined positions in the axial direction to obtain a camshaft material.
次に、フレーム４に支持され、垂直回転軸を有するモー
タ５ａと、該モータ５ａの回転軸に連結されたモータ用
チャック５ｂとを備えた回転駆動部としての回転駆動装
置５を準備し、該装置５のモータ用チャック５ｂにシャ
フト部材３の上端部を把持させる。Next, a rotary drive device 5 as a rotary drive section is prepared, which is supported by the frame 4 and includes a motor 5a having a vertical rotation axis, and a motor chuck 5b connected to the rotation axis of the motor 5a. The upper end of the shaft member 3 is gripped by the motor chuck 5b of the device 5.
次に、円板状の錘載置板６ａとその上面に立設された芯
枠６ｂとからなる錘載置具６、及び上部側でシャフト部
材３の下端部を把持する一方下部側で錘載置具６の芯枠
６ｂを把持する錘用チャック７とを準備し、錘載置板６
ａの上に円盤状の錘８を載置すると共に、錘用チャック
７によりシャフト部材３の下端部と鍾支持具６の芯枠６
ｂとを連結する。Next, a weight mounting device 6 consisting of a disc-shaped weight mounting plate 6a and a core frame 6b erected on the upper surface thereof, and a weight mounting device 6 which grips the lower end of the shaft member 3 on the upper side and a weight mounting device 6 on the lower side. A weight chuck 7 for gripping the core frame 6b of the mounting tool 6 is prepared, and the weight mounting plate 6 is
A disc-shaped weight 8 is placed on top of a, and the weight chuck 7 connects the lower end of the shaft member 3 to the core frame 6 of the plow support 6.
b.
この場合、錘８の重量としては、シャフト部材３に加わ
る引張応力が５〜５０ｋｇｆ／ｃｍ２の範囲内になるよ
うに設定することが好ましい。その理由は、引張応力が
５ｋｇｆ／ａｍ２未満では錘を吊り下げる効果が不十分
であり、また引張応力が５０ｋｇｆ／ｃｍ２超では引張
応力が過大になり溶接割れが生じやすくなるためである
。In this case, the weight of the weight 8 is preferably set so that the tensile stress applied to the shaft member 3 is within the range of 5 to 50 kgf/cm<2>. The reason for this is that if the tensile stress is less than 5 kgf/am2, the effect of suspending the weight is insufficient, and if the tensile stress exceeds 50 kgf/cm2, the tensile stress becomes excessive and weld cracks are likely to occur.
次に、モータ５ａひいてはシャフト部材３を回転させつ
つ、高エネルギービーム９例えばレーザービーム或いは
電子ビーム等を順次下方へ移動させながら、カム部材１
及びジャーナル部材２とシャフト部材３とを各々全周に
亘って溶接し、溶接が完了した後に、シャフト部材３か
ら錘８を除去する。Next, while rotating the motor 5a and thus the shaft member 3, the cam member 1 is moved while the high energy beam 9, for example, a laser beam or an electron beam, is sequentially moved downward.
Then, the journal member 2 and the shaft member 3 are each welded over the entire circumference, and after the welding is completed, the weight 8 is removed from the shaft member 3.
このようにして、カムシャフトを製造すると、シャフト
部材３は錘８の重力により軸方向に拘束された状態で溶
接されているため、高エネルギービームの熱を周方向に
順次加えられてもシャフト部材３は溶接部で曲がり難い
。When the camshaft is manufactured in this way, the shaft member 3 is welded while being restrained in the axial direction by the gravity of the weight 8, so even if the heat of the high-energy beam is sequentially applied in the circumferential direction, the shaft member 3 3 is difficult to bend at the welded part.
また、このようにして得たカムシャフトは、引っ張られ
た状態で溶接されているため、溶接後に錘８を取り除い
て引張応力を除去すると、溶接部に圧縮残留応力が生成
されるので、カムシャフトの強度が向上する。In addition, since the camshaft obtained in this way is welded under tension, if the weight 8 is removed after welding to remove the tensile stress, compressive residual stress will be generated in the welded part, so the camshaft strength is improved.
次に本発明を評価するために行なったシャフト部材３の
曲がり量測定テストについて説明する。Next, a test for measuring the amount of bending of the shaft member 3 conducted to evaluate the present invention will be described.
具体例及び比較例に供するため、ＪＩＳ−５ＣＭ４１５
Ｈよりなるカム部材１及びジャーナル部材２と、Ｊ Ｉ
Ｓ−Ｓｒ１−５ＴＫよりなるシャフト部材３とを準備
し、カム部材１及びジャーナル部材２に対して防炭処理
した後浸炭焼入れ及び焼戻しを行ない、その後、カム部
材１及びジャーナル部材２をシャフト部材３に嵌装した
。For specific examples and comparative examples, JIS-5CM415
A cam member 1 and a journal member 2 made of H, and J I
A shaft member 3 made of S-Sr1-5TK is prepared, and the cam member 1 and journal member 2 are carburized and tempered after being carburized. It was fitted in.
次に、具体例としては、シャフト部材３の下端部に２０
ｋｇの錘を取り付ける一方、シャフト部材３を回転駆動
装置５により回転させながら、カム部材１及びジャーナ
ル部材２とシャフト部材３とを各々溶接した。Next, as a specific example, 20
While attaching a weight of 1 kg, the cam member 1 and the journal member 2 were welded to the shaft member 3 while the shaft member 3 was rotated by the rotary drive device 5.
また、比較例としては、シャフト部材３の下端に錘を取
り付けることなく、シャフト部材３を回転駆動装置５に
より回転させながら、カム部材１及びジャーナル部材２
とシャフト部材３とを各々溶接した。In addition, as a comparative example, the cam member 1 and the journal member 2 are
and the shaft member 3 were welded to each other.
その結果、具体例により得たカムシャフトは曲げ変形が
少なく、振れの最大値が０．２０ｍｍであったのに対し
て、比較例により得たカムシャフトは曲げ変形が大きく
、振れの最大値はｏ、３５ｍｍであって、本発明の効果
が確認できた。As a result, the camshaft obtained in the specific example had little bending deformation and the maximum value of runout was 0.20 mm, whereas the camshaft obtained in the comparative example had large bending deformation and the maximum value of runout was 0.20 mm. o, 35 mm, and the effect of the present invention was confirmed.
（発明の効果）
以上説明したように、本発明に係るカムシャフトの製造
方法によると、シャフト部材をその下端部に錘を取り付
けた状態で回転させつつ溶接するため、シャフト部材は
軸方向に拘束された状態で溶接されるので、溶接による
シャフト部材の曲がりを効果的に防止することができる
。(Effects of the Invention) As explained above, according to the method for manufacturing a camshaft according to the present invention, since the shaft member is welded while rotating with a weight attached to the lower end thereof, the shaft member is restrained in the axial direction. Since the shaft member is welded in a fixed state, bending of the shaft member due to welding can be effectively prevented.
また、シャフト部材を錘で引っ張った状態で溶接してい
るため溶接部に圧縮残留応力が生成されるので、カムシ
ャフトの強度が向上する。Further, since the shaft member is welded while being pulled by a weight, compressive residual stress is generated in the welded portion, so that the strength of the camshaft is improved.
第１図は本発明の一実施例であるカムシャフトの製造方
法を示す正面図である。
１・・・カム部材
２・・・ジャーナル部材
３・・・シャフト部材
５・・・回転駆動装置（回転駆動部）
５ａ・・・モータ
５ｂ・・・モータ用チャック
６・・・錘載置具
７・・・錘用チャック
８・・・錘
９・・・高エネルギービーム
１・・・カム部材
２・・・ジャーナル部材
３・・・シャフト部材
５・・・回転駆動装置
５ａ・・・モータ
５ｂ・・・モータ用チャック
６・・・錘載置具
７・・・錘用チャック
８・・・錘
９・・・高エネルギービーム
（回転駆動部）
第
図FIG. 1 is a front view showing a method of manufacturing a camshaft according to an embodiment of the present invention. 1... Cam member 2... Journal member 3... Shaft member 5... Rotation drive device (rotation drive unit) 5a... Motor 5b... Motor chuck 6... Weight mounting tool 7... Weight chuck 8... Weight 9... High energy beam 1... Cam member 2... Journal member 3... Shaft member 5... Rotation drive device 5a... Motor 5b ... Motor chuck 6 ... Weight mounting tool 7 ... Weight chuck 8 ... Weight 9 ... High energy beam (rotation drive part) Fig.
Claims (1)
ト部材を垂直回転軸を有する回転駆動部に吊り下げると
共に、該シャフト部材の下端部に錘を取り付け、その後
、上記回転駆動部により上記シャフト部材を回転させな
がら上記カム部材及びジャーナル部材とシャフト部材と
を各々溶接することを特徴とするカムシャフトの製造方
法。(1) A shaft member fitted with a cam member and a journal member is suspended from a rotation drive unit having a vertical rotation axis, and a weight is attached to the lower end of the shaft member, and then the shaft member is driven by the rotation drive unit. A method of manufacturing a camshaft, comprising welding the cam member and journal member to the shaft member while rotating the camshaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1321851A JPH03181652A (en) | 1989-12-11 | 1989-12-11 | Manufacture of cam shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1321851A JPH03181652A (en) | 1989-12-11 | 1989-12-11 | Manufacture of cam shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03181652A true JPH03181652A (en) | 1991-08-07 |
Family
ID=18137130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1321851A Pending JPH03181652A (en) | 1989-12-11 | 1989-12-11 | Manufacture of cam shaft |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03181652A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001079661A1 (en) * | 2000-04-14 | 2001-10-25 | Karl Merz | Camshaft and a method and a device for producing the same |
| JP2004501310A (en) * | 2000-06-23 | 2004-01-15 | メルツ，カール | Method of manufacturing cam for camshaft |
-
1989
- 1989-12-11 JP JP1321851A patent/JPH03181652A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001079661A1 (en) * | 2000-04-14 | 2001-10-25 | Karl Merz | Camshaft and a method and a device for producing the same |
| JP2003531329A (en) * | 2000-04-14 | 2003-10-21 | メルツ，カール | Camshaft, manufacturing method thereof, and manufacturing apparatus thereof |
| US6892687B2 (en) | 2000-04-14 | 2005-05-17 | Karl Merz | Camshaft and a method and a device for producing the same |
| JP4686099B2 (en) * | 2000-04-14 | 2011-05-18 | メルツ，カール | Camshaft and manufacturing method thereof |
| JP2004501310A (en) * | 2000-06-23 | 2004-01-15 | メルツ，カール | Method of manufacturing cam for camshaft |
| JP4674033B2 (en) * | 2000-06-23 | 2011-04-20 | メルツ，カール | Method for manufacturing camshaft cam |
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