JPS63221959A - Grinding method for cast iron camshaft - Google Patents
Grinding method for cast iron camshaftInfo
- Publication number
- JPS63221959A JPS63221959A JP5850487A JP5850487A JPS63221959A JP S63221959 A JPS63221959 A JP S63221959A JP 5850487 A JP5850487 A JP 5850487A JP 5850487 A JP5850487 A JP 5850487A JP S63221959 A JPS63221959 A JP S63221959A
- Authority
- JP
- Japan
- Prior art keywords
- camshaft
- cast iron
- grinding
- ground
- machining
- 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.)
- Granted
Links
- 229910001018 Cast iron Inorganic materials 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims description 16
- 238000003754 machining Methods 0.000 claims description 23
- 239000002184 metal Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 238000005452 bending Methods 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 5
- 238000005266 casting Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 240000005979 Hordeum vulgare Species 0.000 description 1
- 235000007340 Hordeum vulgare Nutrition 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 229910001567 cementite Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000007730 finishing process Methods 0.000 description 1
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Landscapes
- Gears, Cams (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、カムシャフトのカム部が冷し金によりチル
化されたような鋳鉄製カムシャフトの加工方法に関する
。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method of machining a cast iron camshaft in which the cam portion of the camshaft is chilled with a cold metal.
（従来技術）
従来、例えば、特開昭５９−３９４ ／１．６号公報に
記載のように、カムシャフトのカム部を冷し金（ｃｈｉ
ｌｌｅｒ ）にて挟圧保持して、カムシャフトを鋳造す
る方法がある。(Prior art) Conventionally, for example, as described in Japanese Patent Application Laid-Open No. 59-394/1.6, the cam portion of the camshaft was cooled with a cold metal (chi).
There is a method of casting the camshaft by holding the camshaft under pressure.
このようにして鋳造されたカムシャフトは、上述の冷し
金に相当するカム部が伯の部分より硬いチル相識（遊離
セメンタイトとバーライ１〜の硬い白銑組織）となる。In the camshaft cast in this manner, the cam portion corresponding to the above-mentioned chilled metal has a chill phase (hard white pig iron structure of free cementite and barley 1) that is harder than the square portion.
そして、上述の鋳鉄製カムシャフトは第４図に示す加工
方法に基づいて順次加工される。The cast iron camshaft described above is then sequentially machined based on the process shown in FIG.
すなわち、第１の工程４１で、カムシャフト６０（第５
図参照）の文法めを行うと共に、カムシャフト６０の両
端センタ一部にセンターもみを行なう。That is, in the first step 41, the camshaft 60 (the fifth
(See figure), and also perform center rubbing on part of the center of both ends of the camshaft 60.
次に第２の工程４２で、上述のカムシャフト６０にお【
プる複数のジャーナル部６１・・・に対して鋳造余肉を
切削する外径削りを行なう。Next, in a second step 42, the above-mentioned camshaft 60 is
The outer diameter of the plurality of journal parts 61 . . . is cut to remove excess casting thickness.
次に第３の工程４３で、カムシャフト６０の軸芯に沿っ
て潤滑油通路を形成する油穴加■を行なう。Next, in a third step 43, an oil hole is drilled to form a lubricating oil passage along the axis of the camshaft 60.
次に第４の工程４４で、カムシャフト６０の両端部に穴
加工を施す両端穴加工を行なう。Next, in a fourth step 44, both ends of the camshaft 60 are machined.
次に第５の工程４５で、カムシャフトプーリをキー嵌合
するために、上述のカムシャフト６０の一端外周面にキ
ー溝削りを行なう。Next, in a fifth step 45, a keyway is cut on the outer peripheral surface of one end of the camshaft 60 in order to key-fit the camshaft pulley.
次に第６の工程４６で、予め余肉を切削した前述のジャ
ーナル部６１・・・に対して外径研削を行なう。Next, in a sixth step 46, outer diameter grinding is performed on the aforementioned journal portions 61 . . . from which excess thickness has been cut in advance.
次に第７の工程／Ｉ７で、カムシャフト６０の複数のカ
ム部６２・・・に対して摺動面の外径研削を行なう。Next, in a seventh step /I7, the outer diameter of the sliding surface of the plurality of cam portions 62 of the camshaft 60 is ground.
次に第８の工程４８で、カムシャフト６０にリューブラ
イト処理を施して、表面を所定硬度にする。Next, in an eighth step 48, the camshaft 60 is subjected to a lubrite treatment to give the surface a predetermined hardness.
次に第９の工程４９で、カムシャフト６０の上述のジャ
ーナル部６１・・・に紙やずり等を用いてペーパーラッ
ピングを行なって、精密仕上げする。Next, in a ninth step 49, the above-mentioned journal portions 61 of the camshaft 60 are paper-wrapped using paper, sandpaper, etc., for precision finishing.
次に第１０の工程５０で、ペーパーラップ仕上げ後のカ
ムシャフト６０を洗浄液で洗浄する。Next, in a tenth step 50, the camshaft 60 after paper wrapping is cleaned with a cleaning liquid.
次に第１１の工程５１で、所定箇所に袖穴栓用のボール
を圧入する。Next, in an eleventh step 51, balls for cuff holes are press-fitted into predetermined locations.
このような各工程により、上述の鋳鉄製カムシャフト６
０が加工されるが、従来の加工方法においては次のよう
な問題点があった。Through these steps, the above-mentioned cast iron camshaft 6
0 is processed, but the conventional processing method has the following problems.
つまり前述の各工程４１〜５１による加工前のカムシャ
フト６０は、第６図に示す如くデル部６３と、非チル部
６４との残留応力（同図に横線を施して示す）が互にバ
ランスしているが、ジャーナル部６１・・・の外径研削
後において、第７図に削り代（で示す如くカム部６２・
・・の摺動面が研削されるので、上述の残留応力（素材
の持つ鋳造応力のこと）のバランスが崩れて、カムシャ
フト６゜の揺れ量δ２ （第３図参照）が大となる欠点
があった。In other words, in the camshaft 60 before processing in the above-mentioned steps 41 to 51, as shown in FIG. However, after grinding the outer diameter of the journal portion 61..., the machining allowance (as shown in Fig. 7) is
Because the sliding surfaces of ... are ground, the balance of the residual stress (casting stress of the material) mentioned above is lost, and the amount of oscillation δ2 of the camshaft 6° (see Figure 3) becomes large. was there.
従来、上述例の如き、残留応力の歪みに起因するカムシ
ャフト６ｏの揺れ量δ２を抑制する手段として、加工前
にカムシャフト６ｏを焼鈍したり或は加工後において、
カムシャフト６ｏが曲った方向と逆方向に力を加えて曲
り直しを行なう所謂歪み取り方法が用いられていたが、
何れもコスト高となる問題点を有していた。Conventionally, as a means for suppressing the amount of oscillation δ2 of the camshaft 6o caused by distortion due to residual stress, as in the above-mentioned example, the camshaft 6o is annealed before processing or after processing.
A so-called strain relief method was used in which the camshaft 6o was re-bent by applying force in the opposite direction to the direction in which it was bent.
All of them had the problem of high costs.
（発明の目的）
この発明は、残留応力による歪みを減少して、カムシャ
フトの揺れ量の低減を図ることができる鋳鉄製カムシャ
フトの加工方法の提供を目的とする。(Object of the Invention) An object of the present invention is to provide a method of machining a cast iron camshaft, which can reduce distortion due to residual stress and reduce the amount of shaking of the camshaft.
（発明の構成）
この発明は、カムシャフトのカム部が冷し金によりチル
化された鋳鉄製カムシャフトの加工方法であって、上記
カムシャフトのカム部を研削し、その後１．Ｆ記カムシ
ヤフトのジャー太ル部を研削する鋳鉄製カムシャフトの
加工方法であることを特徴とする。(Structure of the Invention) The present invention is a method of machining a cast iron camshaft in which the cam portion of the camshaft is chilled with a chilled metal, in which the cam portion of the camshaft is ground, and then 1. This method is characterized in that it is a method for machining a cast iron camshaft in which the jar diameter portion of the camshaft is ground.
（発明の効果）
この発明によれば、ジャーナル部の外径研削前に、カム
部つまりカム摺動面の研削を行なって、所定割合以上の
残留応力を解放し、その後、基準となるジャーナル部の
研削を行なうので、残留応力による歪みを減少して、カ
ムシャフトの揺れ囲の低減を図ることができる効果があ
る。(Effect of the invention) According to the present invention, before grinding the outer diameter of the journal part, the cam part, that is, the cam sliding surface, is ground to release residual stress of a predetermined proportion or more, and then the journal part, which becomes the reference, is ground. Since this grinding is performed, distortion due to residual stress can be reduced and the oscillation range of the camshaft can be reduced.
（実施例） この発明の一実施例を以下図面に基づいて詳述する。(Example) An embodiment of the present invention will be described in detail below based on the drawings.
図面は鋳鉄製カムシャフトの加工方法を示し、予め第２
図に示すようにカム部１・・・が冷し金（ｃｈｉｌｌｅ
ｒ ）によりデル化された鋳鉄製カムシャフト２を鋳造
する。The drawing shows the method of machining a cast iron camshaft.
As shown in the figure, the cam part 1...
A cast iron camshaft 2 is cast using the following method.
そして上述の鋳鉄製カムシャフト２を第１図に示す加工
方法に基づいて順次加工する。Then, the cast iron camshaft 2 described above is sequentially machined based on the processing method shown in FIG.
まず、第１の■程１１で、カムシャフト２の長手方向の
寸法を決める文法めを行うと共に、カムシャフト２の両
端センタ一部にセンターもみ（ｓｉｎｋｉｎｇ ）を行
なう。First, in the first step 11, a grammatical adjustment is performed to determine the longitudinal dimension of the camshaft 2, and a part of the center of both ends of the camshaft 2 is subjected to center kneading (sinking).
次に第２の工程１２で、上述のカムシャフト２における
複数のジャーナル部３・・・に対して鋳造余肉を切削す
る外径削りを行なう。Next, in a second step 12, the outer diameter of the plurality of journal parts 3 of the above-mentioned camshaft 2 is cut to remove excess casting thickness.
次に第３の工程１３で、カムシャフト２の軸芯に沿って
潤滑油通路を形成する油穴加工を行なう。Next, in a third step 13, an oil hole is machined to form a lubricating oil passage along the axis of the camshaft 2.
次に第４の工程１４で、カムシャフト２の両端部に穴加
工を施す両端穴加工を行なう。Next, in a fourth step 14, both ends of the camshaft 2 are machined.
次に第５の工程１５で、カムシャフトブーりをキー嵌合
するために、上述のカムシャフト２の一端外周面にキー
溝削りを行なう。Next, in a fifth step 15, a key groove is cut on the outer circumferential surface of one end of the camshaft 2 described above in order to key-fit the camshaft boob.
次に第６の工ｆ？１６で、カムシャフト２の複数のカム
部１・・・に対して摺動面の外径研削を荒加工Ｊる。Next is the 6th work f? At step 16, the outer diameter of the sliding surface of the plurality of cam parts 1 of the camshaft 2 is roughly ground.
ここで、上述の荒加工時の荒削り代ｑ１ （第３図参照
）は最大重り量、最終削り代ｑ２および許容公差（許容
曲り呈）から次式で求めることができる。Here, the rough machining allowance q1 (see FIG. 3) during the above-mentioned rough machining can be determined from the maximum weight amount, the final machining allowance q2, and the allowable tolerance (allowable bending) using the following equation.
最小荒削り代ｑ１
一最終削り代ｑ２×許容曲り吊／最大曲り量そして、最
終削り代ｑ２を１ ｍｍに、最大重りＭｉを６０ｔｌＴ
ｒＬに、許容曲り量を３０μｍに設定すると、上述の荒
削り代ｑ１−０．５＃となり、この０．５ｍｍ以上荒加
工で削ることによって、公差内におさめることができる
。Minimum rough machining allowance q1 - Final machining allowance q2 x allowable bending/maximum bending amount Then, final machining allowance q2 is 1 mm, maximum weight Mi is 60tlT
If the allowable bending amount is set to 30 μm for rL, the above-mentioned rough cutting allowance q1-0.5# will be obtained, and by rough cutting this 0.5 mm or more, it can be kept within the tolerance.
次に第７の工程１７で、予め余肉を切削した前述のジャ
ーナル部３・・・に対して外径研削を行なう。Next, in a seventh step 17, outer diameter grinding is performed on the aforementioned journal portion 3, from which excess thickness has been cut in advance.
次に第８の工程１８で、荒加］ニされた上述のカム部１
・・・に対して仕」二げ研削加工を施す。なお、この仕
上げ加工は、カム摺動面の公差の如何によっては前述の
第６の工程で同時に行なってもよい。Next, in an eighth step 18, the roughened cam portion 1
Apply double-grinding to... Note that this finishing process may be performed simultaneously with the above-mentioned sixth step depending on the tolerance of the cam sliding surface.
次に第９のＪ稈１９で、カムシャフト２にリューブライ
ト処理を施して、表面を所定硬度に硬化させる。Next, in the ninth J culm 19, the camshaft 2 is subjected to a lubrite treatment to harden the surface to a predetermined hardness.
次に第１０の１程２０で、カムシャフト２の上述のジャ
ーナル部３・・・に紙やすり等を用いてペーパーラッピ
ングを行なって、精密仕上げする。Next, in a tenth step 20, the above-mentioned journal portions 3 of the camshaft 2 are paper wrapped using sandpaper or the like to give a precision finish.
次に第１１の工程２１で、ペーパーラップ仕上げ後のカ
ムシャフト２を洗浄液で洗浄する。Next, in an eleventh step 21, the camshaft 2 after paper wrapping is cleaned with a cleaning liquid.
次に第１２の工程２２で、所定箇所に油穴栓用のボール
を圧入する。Next, in a twelfth step 22, a ball for an oil hole plug is press-fitted into a predetermined location.
このように、ジャーナル部３・・・の外径研削前に、カ
ム部１・・・の研削を行ない、荒加工により所定割合以
上の残留応力を解放して、その後、基準となるジャーナ
ル部３・・・の研削を行ない、次いでカム部２・・・の
仕上げ研削を行なうので、荒加工後の状態を基準とする
ことができ、第３図に示Ｊ−ように揺れ量δ１は荒加工
後から仕上げ加工までの曲り量となって、従来の揺れ司
δ２と比較して該揺れ量の大幅な低減を図ることができ
る効果がある。In this way, before grinding the outer diameter of the journal part 3..., the cam part 1... is ground to release the residual stress of a predetermined proportion or more by rough machining, and then the journal part 3, which becomes the reference, is ground. ... is ground, and then finish grinding is performed on the cam portion 2..., so the state after rough machining can be used as a reference, and as shown in Fig. 3, the amount of vibration δ1 is equal to the rough machining. There is an effect that the amount of sway can be significantly reduced in comparison with the conventional sway controller δ2, which results in the amount of bending from subsequent to finishing machining.
加えて従来の焼鈍などによる揺れ量の抑制方法と比較し
て、低コスト【・、しかも簡便に揺れ量の低減を図るこ
とができる効果がある。In addition, compared to conventional methods of suppressing the amount of shaking such as annealing, this method has the effect of reducing the amount of shaking easily and at a lower cost.
図面はこの発明の一実施例を示し、
第１図は鋳鉄製カムシャフトの加工方法を示すフロー図
、
第２図は鋳鉄製カムシャフトの側面図、第３図は削り代
に対する曲り吊の関係を示す特性図、
第４図は従来の鋳鉄製カムシャフトの加工方法を示すフ
ロー図、
第５図は鋳鉄製カムシャフトの側面図、第６図は残留応
力のバランス状態を示す説明図、第７図は残留応力のア
ンバランス状態を示す説明図である。
１・・・カム部 ２・・・カムシャフト３・
・・ジャーナル部
第１図 第４図
１１ 丈伏め
乞ンクー
ブチめ ４１
ぜンクー６Ｊｆ
１２ 外径削り
外径削り ４２
１３ 抽穴茄工
５由穴加工 ４３
１４Ｐ４穴加工
両Ｓ、！、エ ４４
１５ キー溝削す
第２図
３−”；ｖ ｊ）Ｌｉ２ 第３図ｌｈ
、ｅｆＴ
第７図The drawings show one embodiment of the present invention, Fig. 1 is a flow diagram showing a method of machining a cast iron camshaft, Fig. 2 is a side view of the cast iron camshaft, and Fig. 3 shows the relationship between bending and machining allowance. Figure 4 is a flow diagram showing the conventional machining method for cast iron camshafts, Figure 5 is a side view of cast iron camshafts, Figure 6 is an explanatory diagram showing the balance state of residual stress, FIG. 7 is an explanatory diagram showing an unbalanced state of residual stress. 1...Cam part 2...Camshaft 3.
...Journal part Fig. 1 Fig. 4 Fig. 11 Lowering the length 41 Zenku 6Jf 12 Outer diameter cutting Outer diameter cutting 42 13 Drilling hole machining 5 holes machining 43 14P4 hole machining both S,! , d 44 15 Keyway cutting Fig. 2 3-”; v j) Li2 Fig. 3 lh , efT Fig. 7
Claims (1)
鋳鉄製カムシャフトの加工方法で あって、 上記カムシャフトのカム部を研削し、その 後、上記カムシャフトのジャーナル部を研 削する 鋳鉄製カムシャフトの加工方法。[Claims] 1. A method for machining a cast iron camshaft in which the cam portion of the camshaft is chilled with a chilled metal, wherein the cam portion of the camshaft is ground, and then the journal of the camshaft is How to process a cast iron camshaft by grinding the parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62058504A JP2654619B2 (en) | 1987-03-12 | 1987-03-12 | Processing method of camshaft made of cast iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62058504A JP2654619B2 (en) | 1987-03-12 | 1987-03-12 | Processing method of camshaft made of cast iron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63221959A true JPS63221959A (en) | 1988-09-14 |
| JP2654619B2 JP2654619B2 (en) | 1997-09-17 |
Family
ID=13086250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62058504A Expired - Fee Related JP2654619B2 (en) | 1987-03-12 | 1987-03-12 | Processing method of camshaft made of cast iron |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2654619B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7568969B2 (en) | 2003-10-22 | 2009-08-04 | Nippei Toyama Corporation | Locking mechanism of linear motor travel slider and processing machine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61274865A (en) * | 1985-05-30 | 1986-12-05 | Toyoda Mach Works Ltd | Profile grinding machine |
-
1987
- 1987-03-12 JP JP62058504A patent/JP2654619B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61274865A (en) * | 1985-05-30 | 1986-12-05 | Toyoda Mach Works Ltd | Profile grinding machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7568969B2 (en) | 2003-10-22 | 2009-08-04 | Nippei Toyama Corporation | Locking mechanism of linear motor travel slider and processing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2654619B2 (en) | 1997-09-17 |
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