JPS5893536A - Forming method for crank shaft - Google Patents
Forming method for crank shaftInfo
- Publication number
- JPS5893536A JPS5893536A JP19310581A JP19310581A JPS5893536A JP S5893536 A JPS5893536 A JP S5893536A JP 19310581 A JP19310581 A JP 19310581A JP 19310581 A JP19310581 A JP 19310581A JP S5893536 A JPS5893536 A JP S5893536A
- Authority
- JP
- Japan
- Prior art keywords
- crankshaft
- crank
- forming method
- axis
- crank 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
- 238000000034 method Methods 0.000 title claims description 8
- 238000000465 moulding Methods 0.000 claims description 7
- 238000005242 forging Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/06—Making machine elements axles or shafts
- B21K1/08—Making machine elements axles or shafts crankshafts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明はクラン゛り軸の軽量化゛を目的としたクランク
軸の成形方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of forming a crankshaft for the purpose of reducing the weight of the crankshaft.
゛ 以下本発明を図面を参照しつつ詳細に説明する。゛ Hereinafter, the present invention will be explained in detail with reference to the drawings.
第１図および第２図には本発明の成形方法を用いて造う
れた６気筒エンジン用クランク軸の一部が示されており
、クランクジャーナル２とクランクピン４とを連結する
バクンスウェイト付クランクアーム６のクランクピン４
側の端面にはクランクジャーナル２の軸線を含むように
して凹所８が形成されている。そしてこの凹所８を有す
る６気筒エンジン用クランク軸を成形するに当っては、
まず、第１図に示すように粗材を図示しないハンマによ
り・矢視Ａの方向から打ち、第３図（ａ）に示すよ５に
各クランクピン４（＠、 ｂ、 ｃ、 ｄ、
ｅ、 ｆ）の軸線がクランクジャーナル２の軸線を含
む一平面内に位置すもように箋てクランク軸の原型を成
形するとともにその−・ンマ打ちの際同時に凹所Ｂを形
成する。次いでこのクランク軸の原型をクランクジャー
ナル２の軸線を中心として捩り第３図−（ｂ）に示すよ
うにクランクピン４ｍ、４ｆの軸線とクランクピン４ｂ
、４ｅの軸線とクランクピン４ ｃ、”４ｄの軸線がそ
れぞれクランクージャーナル２の軸線に対し１２０′
ずつ角度を有するようにして６気筒エンジン用クラジク
軸が成形される。1 and 2 show a part of a crankshaft for a 6-cylinder engine manufactured using the molding method of the present invention, with a back weight connecting the crank journal 2 and the crank pin 4. Crank pin 4 of crank arm 6
A recess 8 is formed in the side end face so as to include the axis of the crank journal 2. When molding a crankshaft for a 6-cylinder engine having this recess 8,
First, as shown in Fig. 1, the rough material is struck with a hammer (not shown) in the direction of arrow A, and as shown in Fig. 3(a), each crank pin 4 (@, b, c, d,
A prototype of the crankshaft is molded so that the axes of e and f) are located within one plane including the axis of the crank journal 2, and a recess B is simultaneously formed during punching. Next, this crankshaft prototype was twisted around the axis of the crank journal 2, and the axes of the crank pins 4m and 4f and the crank pin 4b were twisted as shown in FIG.
, 4e and the axes of crank pins 4c and 4d are each 120' relative to the axis of crank journal 2.
A cradle shaft for a six-cylinder engine is formed so that each part has an angle.
上記の如く成形されたクランク軸は鍛造されるため強靭
な上２機械加工されることなく凹所が形成されるため、
軽量且つ歩留り良く安価に形成されるという効果な奏す
る。The crankshaft formed as described above is strong because it is forged, and the recess is formed without being machined.
It has the advantage of being lightweight, having a high yield, and being formed at low cost.
本発明の成形方法によれば第１図に示される形状According to the molding method of the present invention, the shape shown in FIG.
第１図、は本発明の成形方法を用いて形成されるクラン
ク軸の一例を示す断面図、第２図は第１図の■矢視−２
第λ図は本発明の成形方法の工程を示す説明図、第４図
は本発明の成形方法を用いて形成されるクランク軸の他
の例を示す断面図である。
２・・・クランクジャーナル、 ４・・・クランクビン
。
（α）
（ｂ）FIG. 1 is a sectional view showing an example of a crankshaft formed using the molding method of the present invention, and FIG.
FIG. λ is an explanatory diagram showing the steps of the molding method of the present invention, and FIG. 4 is a sectional view showing another example of a crankshaft formed using the molding method of the present invention. 2...Crank journal, 4...Crank bin. (α) (b)
Claims (1)
れる全てのクランクピンの軸線が上記クランクジャーナ
ル軸線を含む一平面に位置する一体のクランク軸原”型
を鍛造により得たのち、このクランク軸原型に上記クラ
ンクジャーナル として捩り加工を施し、上記クランクピンの一部の軸線
が上記一平面から外れるクランク軸を得るクランク軸の
成形方法において、上記鍛癒時二上とを特徴とするクラ
ジク軸の成形方法[Claims] An integral crankshaft original mold is made by forging, in which the axes of all crank pins connected to the crank journal via cranks are located on one plane including the crank journal axis. After obtaining the crankshaft, this crankshaft prototype is twisted as the crank journal to obtain a crankshaft in which a part of the axis of the crank pin deviates from the one plane. A method for molding crajiku shafts featuring
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19310581A JPS5893536A (en) | 1981-12-01 | 1981-12-01 | Forming method for crank shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19310581A JPS5893536A (en) | 1981-12-01 | 1981-12-01 | Forming method for crank shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5893536A true JPS5893536A (en) | 1983-06-03 |
Family
ID=16302318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19310581A Pending JPS5893536A (en) | 1981-12-01 | 1981-12-01 | Forming method for crank shaft |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5893536A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS635839A (en) * | 1986-06-25 | 1988-01-11 | Yanmar Diesel Engine Co Ltd | Die forging integral type crank shaft |
-
1981
- 1981-12-01 JP JP19310581A patent/JPS5893536A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS635839A (en) * | 1986-06-25 | 1988-01-11 | Yanmar Diesel Engine Co Ltd | Die forging integral type crank shaft |
| JPH0520181B2 (en) * | 1986-06-25 | 1993-03-18 | Yanmar Diesel Engine Co |
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