JPS5927315B2 - Crankshaft processing method - Google Patents
Crankshaft processing methodInfo
- Publication number
- JPS5927315B2 JPS5927315B2 JP54106675A JP10667579A JPS5927315B2 JP S5927315 B2 JPS5927315 B2 JP S5927315B2 JP 54106675 A JP54106675 A JP 54106675A JP 10667579 A JP10667579 A JP 10667579A JP S5927315 B2 JPS5927315 B2 JP S5927315B2
- Authority
- JP
- Japan
- Prior art keywords
- grinding
- fillet
- crankshaft
- outer diameter
- grindstone
- 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.)
- Expired
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Heat Treatment Of Articles (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Description
【発明の詳細な説明】
本発明はクランクシャフトの高精度加工法に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high-precision machining method for a crankshaft.
本発明は、特に研削加工後のクランクシャフトの歪曲を
阻止し、ジャーナル振れの発生やストローク精度の悪化
を防止することを目的とする。The present invention specifically aims to prevent distortion of the crankshaft after grinding, and to prevent journal runout and deterioration of stroke accuracy.
さらに本発明は、クランクピン及びジャーナルのフィレ
ット部の研削焼け、研削割れあるいはノ 。ツチ等の発
生を防止することを目的とする。内燃機関等のクランク
シャフト１は第１図に示すように、軸受に支持されるク
ランクジャーナル２と、コンロツドを取付けるクランク
ピン３とによつて構成されていることは周知である。従
来、このクランクジャーナル２及びクランクピン３の研
磨加工は第３図に示すようにフィレット部１１及びＲ部
５を含む総形に整形された砥石６によつてプランジカツ
トエ法で研削加工されている。Further, the present invention prevents grinding burns, grinding cracks, or cracks on fillet portions of crank pins and journals. The purpose is to prevent the occurrence of pimples, etc. It is well known that a crankshaft 1 of an internal combustion engine, etc., is composed of a crank journal 2 supported by a bearing and a crank pin 3 to which a connecting rod is attached, as shown in FIG. Conventionally, the crank journal 2 and crank pin 3 have been polished using a plunge cutter method using a grindstone 6 shaped into a complete shape including a fillet portion 11 and an R portion 5, as shown in FIG. There is.
このような従来の加工法によると次のような不具合を有
していた。Such conventional processing methods have the following disadvantages.
すなわち、特にフィレット部１１及びＲ部５まで高周波
焼入れが施されていると、研削したときに残留応力が開
放され、クランクシャフトに曲りが生じ、ストローク精
度の悪化及びジャーナル振れが発生していた。Ｊ また
、フィレット部１１及びＲ部５の部分の取代が多いので
研削性が極めて悪く、そのため加工時間を多大に要する
と同時に砥石６の両側面はドレスできないので研削焼け
や研削割れが発生し易かつた。That is, especially when induction hardening is applied to the fillet portion 11 and the R portion 5, residual stress is released during grinding, causing bending in the crankshaft, deterioration of stroke accuracy, and journal runout. J In addition, since the fillet portion 11 and the R portion 5 have a large amount of machining allowance, the grindability is extremely poor, which requires a large amount of machining time, and at the same time, both sides of the grindstone 6 cannot be dressed, so grinding burn and grinding cracks are likely to occur. Katta.
さらには、砥石６の両側面が摩耗などによつて痛む場合
には、径方向で多量のドレスが必要となり砥石の消耗が
激しく、砥石の使用寿命が短い。また、総形ドレス以外
のドレス方法の場合ではフィレット部１１とＲ部５との
継ぎの整形精度が悪く、その結果、研削加工したフィレ
ット部１１とＲ部５との間に第４図に示すようなノッチ
Ｔが生じやすく、該Ｒ部５の強度が低下する問題があつ
た。本発明は上記従来の砥石によるプランジカツトエ法
に基く種々の不具合を解消したクランクシャフトの研削
加工法を提供するもので、その要旨は、クランクピン及
びクランクジャーナルのフィレット部及びＲ部をアンギ
ユラー研削によつて研磨し、その後、フィレット部、Ｒ
部及びメタル面の外径部を焼入れ処理し、次いで残る外
径を通常の総形砥石により研削することを特徴とするも
のである。Furthermore, if both sides of the grindstone 6 are damaged due to wear or the like, a large amount of dressing is required in the radial direction, resulting in severe wear of the grindstone and shortening the usable life of the grindstone. In addition, in the case of a dressing method other than the full-form dressing, the shaping accuracy of the joint between the fillet part 11 and the R part 5 is poor, and as a result, there is a gap between the ground fillet part 11 and the R part 5 as shown in FIG. There was a problem that such a notch T was likely to occur, and the strength of the R portion 5 was reduced. The present invention provides a crankshaft grinding method that eliminates various problems caused by the conventional plunge cutting method using a grindstone. After that, the fillet part, R
This method is characterized in that the outer diameter of the metal surface and the outer diameter of the metal surface are hardened, and then the remaining outer diameter is ground using a general grindstone.
以下本発明の加工法の具体的実施例を第５図によつて説
明する。第５図Ａにおいて先ず、前記クランクジャーナ
ル２の両フィレット部１１及びＲ部５の部分をアンギユ
ラー研削により砥石８でそれぞれ研削する。この第一工
程のアンギユラー研削によつてフィレット部１１及びＲ
部５は所定のＲに沿つた凹曲部９が成形されメタル面の
外径部１０が残る。このアンギユラ一研削加工後に、フ
イレツト部１１、Ｒ部５及びメタル面の外径部１０を高
周波等により焼入れ処理し、第５図Ｂに示すように表面
硬化層４を形成する。A specific example of the processing method of the present invention will be described below with reference to FIG. In FIG. 5A, first, both fillet portions 11 and the R portion 5 of the crank journal 2 are ground using a grindstone 8 by angular grinding. By this first step of angular grinding, the fillet portion 11 and R
In the portion 5, a concave curved portion 9 along a predetermined radius is formed, and an outer diameter portion 10 of the metal surface remains. After this angular grinding process, the fillet portion 11, the R portion 5, and the outer diameter portion 10 of the metal surface are hardened by high frequency or the like to form a hardened surface layer 4 as shown in FIG. 5B.
次いで、第５図Ｃに示すように総形砥石６によつて前記
残存しているメタル面の外径部１０あるいは、外径部１
０とフイレツト部１１の双方を研磨するものである。Next, as shown in FIG.
Both the fillet portion 11 and the fillet portion 11 are polished.
本発明は上記の通り第一工程でフイレツト部１１及びＲ
部５を予めアンギユラ一研削し、凹曲部９を成形して後
に第二工程で焼入れ処理して表面硬化層を形成するもの
であるから、これによりクランクシヤフト１には充分歪
みが起り、第三工程で外径部１０あるいは外径部１０と
フイレツト部１１を総形砥石６による研磨加工で高精度
に仕上げられると共に、表面硬化層４の層厚は十分保持
することができ、特にＲ部５の凹曲部９における表面硬
化層４の層厚が十分確保せられ、シヤフトの曲りに対す
る強度が著しく向上する。As described above, in the first step of the present invention, the fillet portion 11 and the R
Since the part 5 is pre-angularly ground to form the concave curved part 9 and then hardened in a second step to form a surface hardening layer, this causes sufficient distortion in the crankshaft 1 and the second part is hardened. In three steps, the outer diameter part 10 or the outer diameter part 10 and the fillet part 11 can be polished with high accuracy using the general grindstone 6, and the thickness of the surface hardened layer 4 can be maintained sufficiently, especially in the R part. The thickness of the surface hardened layer 4 in the concave portion 9 of No. 5 is ensured sufficiently, and the strength against bending of the shaft is significantly improved.
また、前記第一工程の研削でアンギユラ一研削を行うこ
とによりフイレツト部１１及びＲ部５の取代が従来のプ
ランジカツトエ法に比べて縮少し、さらに砥石もフイレ
ツト部１１及びＲ部５を研削する部分が確実にドレスで
きる。In addition, by performing angular grinding in the first step, the machining allowance of the fillet portion 11 and the R portion 5 is reduced compared to the conventional plunge cutter method, and the grinding wheel is also used to grind the fillet portion 11 and the R portion 5. You can definitely dress the part you want.
その結果、フイレツト部１１及びＲ部５の研磨性が良好
となり、研削焼けや研削割れは全く発生しない。さらに
、砥石６の両側Ｒ部分の損耗もなくなり、砥石６のドレ
ス回数及びドレス量も減少し、砥石６の使用寿命が延長
し経済的であり、ドレス及びフイレツト部研削に要する
時間の削減によつて加工能率の向上が図られる。尚上記
の実施例はクラックジャーナル２の部分の研削を説明し
たが、クランクピン３の部分も同一の方法で研削するも
のであり、同一の効果を得るものである。As a result, the polishability of the fillet portion 11 and the R portion 5 is improved, and no grinding burn or grinding cracks occur. Furthermore, wear and tear on the R portions on both sides of the grinding wheel 6 is eliminated, the number of times the grinding wheel 6 is dressed and the amount of dressing is reduced, the usable life of the grinding wheel 6 is extended, and it is economical, and the time required for dressing and grinding the fillet portion is reduced. As a result, processing efficiency can be improved. Although the above embodiment describes the grinding of the crack journal 2 portion, the crank pin 3 portion is also ground by the same method and the same effect can be obtained.
以上のように本発明は、従来のクランクシヤフトの加工
法の欠点を全て解決し、非常に高精度並びに高強度のク
ランクシヤフトを製造することができる。As described above, the present invention solves all the drawbacks of conventional crankshaft processing methods, and makes it possible to manufacture crankshafts with extremely high precision and high strength.
第１図はクランクシヤフトの側面図、第２図は第１図−
線拡大断面図、第３図は従来の加工法を説明する断面図
、第４図は従来加工法によるフイレツト部分の断面図、
第５図は本発明法の実施例を示し、第５図Ａは第一工程
の断面図、第５図Ｂは第二工程の断面図、第５図Ｃは第
三工程の断面図である。
１・・・・・・クランクシヤフト、２・・・・・・クラ
ックジャーナル、３・・・・・・クランクピン、４・・
・・・・表面硬化層、５・・・・・・Ｒ部、６・・・・
・・総形砥石、８・・・・・・アンギユラ一研削の砥石
、９・・・・・・凹曲部、１０・・・・・・外径゛部、
１１・・・・・・フイレツト部。Figure 1 is a side view of the crankshaft, Figure 2 is Figure 1-
3 is a sectional view illustrating the conventional processing method; FIG. 4 is a sectional view of the fillet portion according to the conventional processing method;
Fig. 5 shows an embodiment of the method of the present invention, Fig. 5A is a sectional view of the first step, Fig. 5B is a sectional view of the second step, and Fig. 5C is a sectional view of the third step. . 1... Crankshaft, 2... Crack journal, 3... Crank pin, 4...
...Surface hardening layer, 5...R part, 6...
...Full shape grindstone, 8...Anguilla single grinding wheel, 9...Concave curved part, 10...Outer diameter part,
11... Fillet part.
Claims (1)
ーナルを研削加工するにおいて、アンギユラー研削によ
つてフィレット部及びＲ部を研削し、該フィレット部、
Ｒ部及びメタル面の外径部を高周波等によつて焼入処理
して表面硬化層を形成し、次いで前記メタル面の外径部
を研削することを特徴とするクランクシャフトの加工法
。1. In grinding the crank pin and crank journal of the crankshaft, the fillet part and the R part are ground by angular grinding, and the fillet part,
A method for processing a crankshaft, characterized in that the R portion and the outer diameter portion of the metal surface are hardened by high frequency or the like to form a surface hardening layer, and then the outer diameter portion of the metal surface is ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54106675A JPS5927315B2 (en) | 1979-08-23 | 1979-08-23 | Crankshaft processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54106675A JPS5927315B2 (en) | 1979-08-23 | 1979-08-23 | Crankshaft processing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5633261A JPS5633261A (en) | 1981-04-03 |
| JPS5927315B2 true JPS5927315B2 (en) | 1984-07-04 |
Family
ID=14439637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP54106675A Expired JPS5927315B2 (en) | 1979-08-23 | 1979-08-23 | Crankshaft processing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5927315B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61220960A (en) * | 1985-03-28 | 1986-10-01 | 株式会社東芝 | Platform safety device |
| JPH0773814B2 (en) * | 1986-06-27 | 1995-08-09 | マツダ株式会社 | Crank shaft manufacturing method |
| JP2565374B2 (en) * | 1988-06-06 | 1996-12-18 | 三菱自動車工業株式会社 | Ductile cast iron crankshaft |
| JPH02216333A (en) * | 1989-02-17 | 1990-08-29 | Kousai Shoji Kk | Getting on/off device for physically handicapped person of bus and double deck bus having same |
| JPH0681854U (en) * | 1994-02-18 | 1994-11-22 | 三井造船株式会社 | Shelter device on platform |
| JP2015227707A (en) * | 2014-06-02 | 2015-12-17 | 日産自動車株式会社 | Crankshaft and manufacturing method thereof |
-
1979
- 1979-08-23 JP JP54106675A patent/JPS5927315B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5633261A (en) | 1981-04-03 |
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