JPH0226087B2 - - Google Patents
Info
- Publication number
- JPH0226087B2 JPH0226087B2 JP56133324A JP13332481A JPH0226087B2 JP H0226087 B2 JPH0226087 B2 JP H0226087B2 JP 56133324 A JP56133324 A JP 56133324A JP 13332481 A JP13332481 A JP 13332481A JP H0226087 B2 JPH0226087 B2 JP H0226087B2
- Authority
- JP
- Japan
- Prior art keywords
- dividing
- connecting rod
- main body
- hardening
- cap
- 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 - Lifetime
Links
Classifications
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C9/00—Bearings for crankshafts or connecting-rods; Attachment of connecting-rods
- F16C9/04—Connecting-rod bearings; Attachments thereof
- F16C9/045—Connecting-rod bearings; Attachments thereof the bearing cap of the connecting rod being split by fracturing
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、内燃機関の連接棒の製造方法、特に
衝撃力により大端部を２分割する連接棒の製造方
法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a connecting rod for an internal combustion engine, and more particularly to a method for manufacturing a connecting rod whose large end is divided into two by impact force.
従来、連接棒の大端部を２分割する製造方法と
して、連接棒の長手方向の軸に対し左右に位置す
る分割予定部に、一直線上に配列された各２ケの
分割補助孔を穿設し、その後、大端部を焼き入れ
し、その後、大端部に衝撃力を加えて、分割補助
孔付近の焼き入れしてぜい弱化した領域と分割補
助孔とで、破断面の進行を誘導し、大端部を本体
部とキヤツプ部とに２分割する方法があつた。
Conventionally, as a manufacturing method for dividing the large end of a connecting rod into two parts, two auxiliary dividing holes arranged in a straight line are drilled in each of the planned dividing parts located on the left and right sides of the longitudinal axis of the connecting rod. Then, the large end is hardened, and an impact force is applied to the large end to induce the progression of the fracture surface between the hardened and weakened area near the splitting auxiliary hole and the splitting auxiliary hole. However, there was a method in which the large end was divided into two parts, a main body part and a cap part.
しかしながら、かかる製造方法では、一直線上
に配列された分割補助孔の存在を利用して破断面
の進行を誘導するため、破断後の破断面が平坦な
ものとなる。その結果、本体部とキヤツプ部との
再組付ける時に正確に位置づけされ難く、従つ
て、両者を高い再組精度で再組付けすることが困
難であつた。
However, in this manufacturing method, since the existence of the division auxiliary holes arranged in a straight line is used to guide the progress of the fracture surface, the fracture surface after fracture becomes flat. As a result, it has been difficult to accurately position the main body and the cap when reassembling them, and it has therefore been difficult to reassemble them with high reassembly accuracy.
本発明は、かかる問題に鑑み、２分割される本
体部とキヤツプ部とを高い再組付け精度で組付け
可能とする内燃機関の連接棒の製造方法を提供す
ることを目的としている。 SUMMARY OF THE INVENTION In view of this problem, it is an object of the present invention to provide a method for manufacturing a connecting rod for an internal combustion engine, which allows the main body section and the cap section, which are divided into two parts, to be reassembled with high reassembly accuracy.
本発明は、連接棒の長手方向の軸に対し左右に
位置する分割予定部に千鳥状に配設される３以上
の分割補助孔のうち、その両端の分割補助孔を結
ぶ直線がボルト孔と略直交するように分割補助孔
を穿設する穿設工程と、その後、少なくとも大端
部を焼き入れする焼入工程と、その後、衝撃力に
より分割予定部を介して本体部とキヤツプ部とに
分割する分割工程と
からなる内燃機関の連接棒の製造方法にある。
In the present invention, among the three or more dividing auxiliary holes arranged in a staggered manner in the dividing portion located on the left and right sides with respect to the longitudinal axis of the connecting rod, a straight line connecting the dividing auxiliary holes at both ends is a bolt hole. A drilling process of drilling auxiliary splitting holes so as to be substantially orthogonal to each other, a hardening process of hardening at least the large end, and then an impact force that causes the main body part and the cap part to be separated through the part to be split. A method of manufacturing a connecting rod for an internal combustion engine includes a dividing step.
各分割予定部に千鳥状に分割補助孔が穿設され
るため、分割後の破断面が、明瞭な凹凸状とな
る。従つて、再組付時、分割された本体部とキヤ
ツプ部とが破断面に形成された明瞭な凹凸によつ
て自動的に調芯される。また、破断面がボルト孔
と略直交して形成されため、本体部とキヤツプ部
とをボルトで締め付けても、本体部とキヤツプ部
とが破断面でボルト孔の軸線に交差する方向にず
れる力を受けることがない。
Since the division auxiliary holes are drilled in a staggered manner in each planned division portion, the fractured surface after division has a clearly uneven shape. Therefore, during reassembly, the divided main body portion and cap portion are automatically aligned due to the clear unevenness formed on the fractured surface. In addition, since the fractured surface is formed approximately perpendicular to the bolt hole, even if the main body and the cap are tightened with bolts, there is a force that causes the main body and the cap to shift at the fractured surface in a direction that intersects with the axis of the bolt hole. I never receive it.
第１図は、本発明に係る連接棒の要部とその分
割状況を示す平面図であり、第２図は、同連接棒
を示す側面図であり、第３図は、同連接棒の分割
時の状況を示す断面図である。
FIG. 1 is a plan view showing the main parts of the connecting rod according to the present invention and how the connecting rod is divided, FIG. 2 is a side view showing the connecting rod, and FIG. 3 is a plan view showing how the connecting rod is divided. FIG.
連接棒１１は、鍛造された後、浸炭防止の銅め
つきを施され、図示されない小端部に孔加工を施
されるとともに、大端部１２に、平軸受を背面支
持する軸受孔１３、分割後のキヤツプ部を本体部
に締め付け可能とするボルト用のボルト孔１４が
それぞれ穿設されるとともに、連接棒の長手方向
の軸に対し左右に位置する各分割予定部（分割後
の分割部１５に相当する部分）に、それぞれ３ケ
の分割補助孔１６，１７，１８が穿設される。こ
こに、分割補助孔１６，１７，１８は、軸受孔１
３の中心Ｏに対する直径方向すなわち分割線方向
に、内方から外方に向けて順次配列されるととも
に、相互に千鳥状すなわち略Ｖ字状に配列され
る。 After the connecting rod 11 is forged, it is copper-plated to prevent carburization, a small end (not shown) is machined with a hole, and a large end 12 is provided with a bearing hole 13 for back-supporting a plain bearing. Bolt holes 14 for bolts that allow the divided cap portion to be fastened to the main body are drilled respectively, and the respective divided portions located on the left and right sides of the longitudinal axis of the connecting rod (divided portions 15), three auxiliary dividing holes 16, 17, and 18 are formed respectively. Here, the divisional auxiliary holes 16, 17, 18 are the bearing hole 1.
They are sequentially arranged from the inside to the outside in the diameter direction with respect to the center O of 3, that is, in the direction of the dividing line, and are mutually arranged in a staggered pattern, that is, in a substantially V-shape.
また、上記分割補助孔１６，１７，１８のうち
両端の分割補助孔１６，１８を結ぶ直線はボルト
孔１４に略直交するように設定されている。 Further, a straight line connecting the two ends of the dividing auxiliary holes 16, 17, 18 is set to be substantially perpendicular to the bolt hole 14.
上記のように大端部１２に、軸受孔１３、ボル
ト孔１４および分割補助孔１６，１７，１８が穿
設された連接棒１１は、次に浸炭焼入を施された
後、第１図および第３図に示すように、軸受孔１
３内の分割線に対する両側に一対の分割カラー１
９Ａ，１９Ｂを挿入し、両分割カラー１９Ａ，１
９Ｂ間にくさび２０を打ち込むことにより衝撃力
を加え、大端部１２が本体部１２Ａとキヤツプ部
１２Ｂとに分割される。この時、大端部１２の左
右の各分割部１５に生成される各破断面２１は、
相互に千鳥状に配列されている分割補助孔１６，
１７，１８に誘導されて略Ｖ字状となり、本体部
１２Ａ側の破断面を分割方向に対して明瞭に凹状
とし、キヤツプ部１２Ｂ側の破断面を分割方向に
対して明瞭に凸状とする。なお、分割補助孔１
６，１７，１８間に形成される破断面２１は、分
割部１５の金属組織等の影響により、両側に分割
補助孔１６，１８と中央の分割補助孔１７の中心
部と交差する第４図Ａの状態、分割補助孔１６，
１８と分割補助孔１７の側部と交差する第４図Ｂ
の状態、もしくは分割補助孔１６，１８と分割補
助孔１７の近傍部と交差する第４図Ｃの状態等
種々の状態となりうる。 The connecting rod 11 in which the bearing hole 13, bolt hole 14, and dividing auxiliary holes 16, 17, and 18 are drilled in the large end portion 12 as described above is then carburized and quenched, and then, as shown in FIG. And as shown in Fig. 3, bearing hole 1
A pair of dividing collars 1 on both sides of the dividing line in 3
Insert 9A, 19B, both split collars 19A, 1
An impact force is applied by driving a wedge 20 between 9B and the large end 12 is divided into a main body 12A and a cap 12B. At this time, each fracture surface 21 generated in each left and right divided portion 15 of the large end portion 12 is
Division auxiliary holes 16 arranged in a staggered manner,
17 and 18 to form a substantially V-shape, the fracture surface on the main body portion 12A side is clearly concave with respect to the dividing direction, and the fracture surface on the cap portion 12B side is clearly convex with respect to the dividing direction. . In addition, division auxiliary hole 1
Due to the influence of the metallographic structure of the dividing portion 15, the fracture surface 21 formed between 6, 17, and 18 intersects with the dividing auxiliary holes 16, 18 on both sides and the central part of the central dividing auxiliary hole 17, as shown in FIG. State A, split auxiliary hole 16,
18 and the side part of the dividing auxiliary hole 17 in FIG. 4 B
It can be in various states, such as the state shown in FIG.
また第４図Ｂ，Ｃは中央の分割補助孔１７にて
示した両端の補助孔１６または１８ということも
あり得る。 Also, FIGS. 4B and 4C may be the auxiliary holes 16 or 18 at both ends, which are shown as the dividing auxiliary hole 17 in the center.
上記実施例によれば、大端部１２の左右の各分
割部１５は、相互に千鳥状をなす各３ケの分割補
助孔１６，１７，１８を介して分割され、略Ｖ字
状の破断面２１を形成されることから、分割され
た本体部１２Ａとキヤツプ部１２Ｂ分割状態でク
ランク軸のクランクピンに装着された後の再組付
け時に、両者は破断面２１に形成されている明瞭
な凹凸部によつて自動的に調芯される。また、各
分割部１５の分割補助孔１６，１７，１８のうち
両端の分割補助孔１６，１８を結ぶ直線ボルト孔
１４と略直交しているから、上記破断面２１の両
端がボルト孔１４に直交することとなる。したが
つて、本体部１２Ａとキヤツプ部１２Ｂとを締め
付けボルトによつて締め付ける時に各分割部１５
の相対する破断面２１がボルト孔１４の軸線に交
差する方向にずれる力を受けることがなく、本体
部１２Ａとキヤツプ部１２Ｂとを分割前における
と同様な一体化状態に再組できる。したがつて、
本体部１２とキヤツプ部１２Ｂとを容易に高い再
組精度で再組付け可能となる。 According to the above embodiment, each of the left and right divided portions 15 of the large end portion 12 is divided through the three dividing auxiliary holes 16, 17, and 18 that are arranged in a staggered manner, and are divided into approximately V-shaped fractures. Since the cross section 21 is formed, when the main body part 12A and the cap part 12B are reassembled after being attached to the crank pin of the crankshaft in the divided state, both parts have a clear cross section 21 formed on the fracture surface 21. The alignment is automatically performed by the uneven parts. Also, since it is approximately perpendicular to the straight bolt hole 14 connecting the dividing auxiliary holes 16, 17, 18 at both ends of the dividing auxiliary holes 16, 17, 18 of each divided portion 15, both ends of the fractured surface 21 are connected to the bolt hole 14. They will be orthogonal. Therefore, when tightening the main body part 12A and the cap part 12B with the tightening bolts, each divided part 15
The opposing fractured surfaces 21 are not subjected to any force that causes them to shift in the direction intersecting the axis of the bolt hole 14, and the main body portion 12A and cap portion 12B can be reassembled into the same integrated state as before the split. Therefore,
The main body portion 12 and the cap portion 12B can be easily reassembled with high reassembly accuracy.
なお、上記実施例においては、左右の各分割予
定部に穿設される分割補助孔１６，１７，１８を
左右間で、軸受孔１３の中心Ｏを通る連接棒１１
の長手方向の軸に関して線対称に形成させたが、
第５図に示すように、左右の分割補助孔１６，１
７，１８を左右間で中心Ｏに関して点対称に配置
させてもよく、その場合には、本体部１２Ａ側の
左右の破断面にそれぞれ凹部と凸部とが形成さ
れ、キヤツプ部１２Ｂ側の左右の破断面にそれぞ
れ凸部と凹部とが形成される。 In the above embodiment, the connecting rod 11 passes through the center O of the bearing hole 13 between the left and right dividing auxiliary holes 16, 17, and 18 drilled in the left and right divided portions.
was formed line-symmetrically with respect to the longitudinal axis of the
As shown in FIG. 5, the left and right dividing auxiliary holes 16, 1
7 and 18 may be arranged point-symmetrically between the left and right sides with respect to the center O. In that case, a concave portion and a convex portion are respectively formed on the left and right fracture surfaces on the main body portion 12A side, and the left and right fracture surfaces on the cap portion 12B side A convex portion and a concave portion are respectively formed on the fractured surface.
また、上記実施例においては、左右の各分割予
定部に各３ケの分割補助孔１６，１７，１８を穿
設させたが、本発明は、実質的に分割補助孔が左
右の各分割予定部で千鳥状に配列されるものであ
れば、左右の各分割予定部に４ケ以上の分割補助
孔を設けるものであつてもよい。 Further, in the above embodiment, three division auxiliary holes 16, 17, and 18 were formed in each of the left and right division planned portions, but in the present invention, the division auxiliary holes are substantially provided in each of the left and right division planned portions. Four or more dividing auxiliary holes may be provided in each of the left and right divided portions as long as they are arranged in a staggered manner.
以上のように本発明によれば、分割された本体
部とキヤツプ部とを容易に高い再組精度で再組付
けできる製造方法を提供できる。
As described above, according to the present invention, it is possible to provide a manufacturing method that allows the divided main body portion and cap portion to be easily reassembled with high reassembly accuracy.
第１図は本発明の一実施例に係る連接棒とその
分割状況とを示す平面図、第２図は同連接棒を示
す側面図、第３図は同連接棒の分割時の状況を示
す断面図、第４図Ａ，ＢおよびＣは同連接棒の異
なる破断状況を示すモデル図、第５図は同連接棒
の変形例を示す平面図である。
１１……連接棒、１２……大端部、１２Ａ……
本体部、１２Ｂ……キヤツプ部、１５……分割
部、１６，１７，１８……分割補助孔、２１……
破断面。
FIG. 1 is a plan view showing a connecting rod according to an embodiment of the present invention and how it is divided, FIG. 2 is a side view showing the connecting rod, and FIG. 3 is a diagram showing how the connecting rod is divided. 4A, B and C are model views showing different fracture states of the connecting rod, and FIG. 5 is a plan view showing a modification of the connecting rod. 11...Connecting rod, 12...Big end, 12A...
Main body part, 12B...Cap part, 15...Dividing part, 16, 17, 18...Dividing auxiliary hole, 21...
Fractured surface.
Claims (1)
に対し左右にそれぞれ位置する分割予定部と、該
分割予定部を介して分割される本体部とキヤツプ
部と、該本体部と該キヤツプ部とを相互に締め付
けるボルトと、該ボルトを挿通するボルト孔とを
備えた内燃機関の連接棒の製造方法において、 該分割予定部に千鳥状に配設される３以上の分
割補助孔のうち、その両端の該分割補助孔を結ぶ
直線が該ボルト孔と略直交するように該分割補助
孔を穿設する穿設工程と、該穿設工程後、少なく
とも該大端部を焼き入れする焼入工程と、該焼入
工程後、衝撃力により該分割予定部を介して該本
体部と該キヤツプ部とに分割する分割工程と、 からなる内燃機関の連接棒の製造方法。 ２ 特許請求の範囲第１項記載の製造方法におい
て、前記焼き入れを侵炭焼き入れとしてなる内燃
機関の連接棒の製造方法。[Scope of Claims] 1. A large end portion of a connecting rod, a planned dividing portion located on the left and right sides with respect to the longitudinal axis of the connecting rod, and a main body portion and a cap portion that are divided via the scheduled dividing portion. A method for manufacturing a connecting rod for an internal combustion engine, comprising bolts for mutually tightening the main body portion and the cap portion, and bolt holes for inserting the bolts, the connecting rod being arranged in a staggered manner in the planned splitting portion. A drilling step of drilling the dividing auxiliary hole among three or more dividing auxiliary holes so that a straight line connecting the dividing auxiliary holes at both ends is substantially perpendicular to the bolt hole, and after the drilling step, at least A connecting rod for an internal combustion engine, comprising: a hardening step of hardening the big end; and a dividing step of dividing the main body portion and the cap portion through the intended dividing portion by impact force after the hardening step. manufacturing method. 2. A method of manufacturing a connecting rod for an internal combustion engine according to claim 1, wherein the hardening is carburizing hardening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13332481A JPS5837310A (en) | 1981-08-27 | 1981-08-27 | Connecting rod of internal-combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13332481A JPS5837310A (en) | 1981-08-27 | 1981-08-27 | Connecting rod of internal-combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5837310A JPS5837310A (en) | 1983-03-04 |
| JPH0226087B2 true JPH0226087B2 (en) | 1990-06-07 |
Family
ID=15102038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13332481A Granted JPS5837310A (en) | 1981-08-27 | 1981-08-27 | Connecting rod of internal-combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5837310A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0696688A1 (en) | 1994-08-12 | 1996-02-14 | Honda Giken Kogyo Kabushiki Kaisha | Process for producing split type mechanical part |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4097472B2 (en) | 2002-07-16 | 2008-06-11 | ヤマハ発動機株式会社 | Breaking structure of connecting rod |
| JP2009162271A (en) * | 2007-12-28 | 2009-07-23 | Jtekt Corp | Double-fractured or cut outer ring, its manufacturing method and split rolling bearing |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5747453Y2 (en) * | 1979-08-14 | 1982-10-19 |
-
1981
- 1981-08-27 JP JP13332481A patent/JPS5837310A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0696688A1 (en) | 1994-08-12 | 1996-02-14 | Honda Giken Kogyo Kabushiki Kaisha | Process for producing split type mechanical part |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5837310A (en) | 1983-03-04 |
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| JPS6117711A (en) | Hollow shaft separable into halves | |
| JPH07286553A (en) | Manufacture of cylinder block |