JP2527990B2 - Engine valve cotter manufacturing method - Google Patents
Engine valve cotter manufacturing methodInfo
- Publication number
- JP2527990B2 JP2527990B2 JP63035025A JP3502588A JP2527990B2 JP 2527990 B2 JP2527990 B2 JP 2527990B2 JP 63035025 A JP63035025 A JP 63035025A JP 3502588 A JP3502588 A JP 3502588A JP 2527990 B2 JP2527990 B2 JP 2527990B2
- Authority
- JP
- Japan
- Prior art keywords
- cotter
- engine valve
- die
- manufacturing
- punch
- 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 - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
- B23P19/042—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts specially adapted for combustion engines
- B23P19/045—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts specially adapted for combustion engines for assembling valve cotters and retainers of engine valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2303/00—Manufacturing of components used in valve arrangements
- F01L2303/01—Tools for producing, mounting or adjusting, e.g. some part of the distribution
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Automatic Assembly (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、自動車用エンジンバルブに組付けられるコ
ッタの製造方法に関する。Description: TECHNICAL FIELD The present invention relates to a method for manufacturing a cotter assembled in an automobile engine valve.
自動車用エンジンバルブに組付けられるコッタは、軸
孔が穿設された円錐台を、軸線に沿って２分割した左右
１組の半円筒体からなっている。The cotter assembled to the engine valve for an automobile is composed of a pair of left and right semi-cylindrical bodies obtained by dividing a truncated cone having a shaft hole into two along the axis.
このコッタ（ａ）の内周面（ｂ）の上縁には、第８図
に示すように、半円断面形のビード部（ｃ）が突設され
ている。As shown in FIG. 8, a bead portion (c) having a semicircular cross section is provided at the upper edge of the inner peripheral surface (b) of the cotter (a).
従来、このコッタ（ａ）は、例えば、次のようにして
製造される。Conventionally, this cotter (a) is manufactured as follows, for example.
第９図に示すように、下面に半円断面形の溝を有する
パンチ（ｄ）と対向する半円断面形のダイ（ｅ）の上
に、薄肉部（ｆ′）の一側に厚肉部（ｆ″）を有する異
形断面形の鋼の帯材（ｆ）を側方より挿入し、これを、
パンチ（ｄ）とダイ（ｅ）により、プレスして、半円筒
体（ｇ）を形成するとともに、この半円筒体（ｇ）の側
端部（ｈ）の要所を、側方から近接させた左右１組のカ
ッター（ｉ）（ｉ）で切断して、コッタ（ａ）とする。As shown in FIG. 9, a punch (d) having a groove having a semicircular cross section on the lower surface thereof is placed on a die (e) having a semicircular cross section facing the punch (d), and a thick wall portion (f ') A steel strip (f) having a modified cross section having a portion (f ″) is inserted from the side, and
A semi-cylindrical body (g) is formed by pressing with a punch (d) and a die (e), and the side end (h) of this semi-cylindrical body (g) is brought close to the side. Cut with a pair of left and right cutters (i) and (i) to obtain a cotter (a).
上述した従来のコッタの製造方法では、最終的にカッ
ター（ｉ）で側端部（ｈ）を切断するため、コッタ
（ａ）の両側端面（ｊ）（ｊ）の下部における薄肉部の
内側隅部（ｒ）が、鋭角となってしまう。In the conventional cotter manufacturing method described above, since the side end portion (h) is finally cut by the cutter (i), the inner corners of the thin portion at the lower portions of the both end surfaces (j) and (j) of the cotter (a). The part (r) becomes an acute angle.
そのため、第10図に示すように、エンジンバルブ
（ｌ）のコッタ溝（ｎ）に、環状をなすばね受け（ｍ）
に内挿したコッタ（ａ）（ａ）を、自動機械で取付ける
際に、組立不良を起こすことがある。Therefore, as shown in FIG. 10, an annular spring bearing (m) is formed in the cotter groove (n) of the engine valve (l).
When the cotters (a) and (a) inserted in the above are attached by an automatic machine, assembly failure may occur.
すなわち、このコッタ（ａ）の組付け作業は、第11図
から第13図に示す順序で行なわれる。That is, the assembling work of the cotter (a) is performed in the order shown in FIGS. 11 to 13.
まず、第11図示のように、ばね受け（ｍ）の内孔に、
１組のコッタ（ａ）（ａ）を嵌合する。First, as shown in FIG. 11, in the inner hole of the spring bearing (m),
Fit a set of cotters (a) (a).
次に、第12図示のように、エンジンバルブ（ｌ）の上
端部を、下方よりコッタ（ａ）（ａ）の間へ進入させ
て、両コッタ（ａ）（ａ）をやや持上げるとともに、逆
ハの字形に開かせる。Next, as shown in FIG. 12, the upper end of the engine valve (l) is advanced from below into the space between the cotters (a) and (a), and both cotters (a) and (a) are slightly lifted. Make it open in an inverted C shape.
次に、第13図示のように、エンジンバルブ（ｌ）を下
降させると、コッタ（ａ）（ａ）は自重によりばね受け
（ｍ）の中を滑り落ちて、そのビード部（ｃ）はコッタ
溝（ｎ）に嵌合し、コッタ（ａ）（ａ）はエンジンバル
ブ（ｌ）に取付けられる。Next, as shown in FIG. 13, when the engine valve (1) is lowered, the cotters (a) and (a) slide down in the spring bearing (m) due to their own weight, and the bead portion (c) of the cotters (a) and cotter is moved. Fitted in the groove (n), the cotters (a) (a) are attached to the engine valve (l).
しかしこの際、前述したように、コッタ（ａ）の側端
面（ｊ）の下部内側隅部（ｒ）が鋭角をなしていると、
コッタ（ａ）は、エンジンバルブ（ｌ）の外周面に引掛
かって円滑に摺動落下せず、適切な組付けが行われない
ことがある。However, at this time, as described above, if the lower inner corner (r) of the side end surface (j) of the cotter (a) forms an acute angle,
The cotter (a) may be caught on the outer peripheral surface of the engine valve (l) and may not be slid and dropped smoothly, so that proper assembly may not be performed.
本発明は、このような問題点を解決するため、半円筒
状のコッタの側端面の一端の内側面隅部を、プレス成形
時に、湾曲隅部として同時に仕上げるようにした、エン
ジンバルブ用コッタの製造方法を提供しようとするもの
である。In order to solve such a problem, the present invention provides a cotter for an engine valve, in which an inner side surface corner of one end of a side end surface of a semi-cylindrical cotter is simultaneously finished as a curved corner during press molding. It is intended to provide a manufacturing method.
本発明によるエンジンバルブ用コッタの製造方法は、
半円断面の凹溝を有するパンチと、半円断面の弧状突部
の末端に円弧状面を介して大径部を同心的に連設したダ
イにおける前記弧状突部との間に板材を挿入し、パンチ
とダイによりこの板材をプレス加工して半円筒状に湾曲
させ、ついでその両側端部を切断することを特徴として
いる。A method for manufacturing an engine valve cotter according to the present invention,
Insert a plate material between a punch having a concave groove with a semicircular cross section and the arc-shaped protrusion of a die in which a large-diameter portion is concentrically connected to the end of the arc-shaped protrusion with a semicircular cross-section through an arc-shaped surface. Then, the plate material is pressed by a punch and a die to be curved into a semi-cylindrical shape, and then both side ends thereof are cut.
パンチとダイによりプレス成形される半円筒状のコッ
タの両側端面の一端部内側隅部は、ダイの円弧状面に押
圧されて湾曲したものとされる。The semi-cylindrical cotter press-molded by the punch and the die has one end inside corners of both end surfaces which are curved by being pressed by the arc-shaped surface of the die.
以下、本発明を図面を参照しながら説明する。 Hereinafter, the present invention will be described with reference to the drawings.
第４図及び第５図に示す（１）はダイで、上部（2a）
が若干薄肉となった前後方向を向く基部（２）と、この
基部（２）の上端より上向突設された上向き半円断面の
弧状突部（３）とからなっている。The die (1) shown in FIGS. 4 and 5 is the upper part (2a).
Is composed of a slightly thin-walled base portion (2) facing in the front-rear direction and an arc-shaped projection portion (3) having an upward semicircular cross section, which is provided to project upward from an upper end of the base portion (2).
弧状突部（３）の上面の前後方向の中間部には、半円
断面半円形の凹溝（４）が形成されている。A concave groove (4) having a semicircular cross section and a semicircular shape is formed in an intermediate portion of the upper surface of the arc-shaped protrusion (3) in the front-rear direction.
弧状突部（３）の後端部には、1/4円弧状の円弧状面
（5a）を介して、上向半円弧状の大径部（５）が、同軸
的に連設されている。At the rear end of the arcuate projection (3), an upward semicircular arc-shaped large-diameter portion (5) is coaxially connected via a 1/4 arcuate arcuate surface (5a). There is.
第２図及び第３図で示す（６）はパンチで、その下面
には、前後方向を向き、かつ後方に向うに従って順次小
径となる断面半円の凹溝（７）が形成されている。A punch (6) shown in FIG. 2 and FIG. 3 has a lower surface formed with a concave groove (7) having a semicircular cross section which is oriented in the front-rear direction and is gradually reduced in diameter toward the rear.
次に、前記ダイ（１）とパンチ（６）により、第６図
及び第７図に示すようなコッタ（８）を製造する要領を
説明する。Next, the procedure for manufacturing the cotter (8) as shown in FIGS. 6 and 7 by the die (1) and the punch (6) will be described.
第１図に示すように、パンチ（６）の上部を、プレス
（９）におけるパンチホルダー（10）に固定し、かつダ
イ（１）を、その弧状突部（３）を上方として、パンチ
（６）の直下において、ダイホルダー（11）に取付け
る。As shown in FIG. 1, the upper part of the punch (6) is fixed to the punch holder (10) of the press (9), and the die (1) is placed with its arcuate projection (3) facing upward. Attach it to the die holder (11) immediately below 6).
なお、第１図における（12）（12）は、ダイ（１）の
側方に設けた左右１対をなすカッターで、駆動手段（1
3）によって水平方向に往復動させられる。In addition, (12) and (12) in FIG. 1 are a pair of left and right cutters provided on the sides of the die (1), which are driven by the drive means (1).
It can be reciprocated horizontally by 3).
（14）（14）は、ダイ（１）の両側部に設けた左右１
組の上向き押出しピンである。(14) (14) is the left and right 1 provided on both sides of the die (1).
A pair of upward pushing pins.
下面前縁に半円断面をなす厚肉部を有する異形断面の
帯材（15）を、上下１対のガイド板（16a）（16b）によ
り案内して、左方より右方へ水平に押出し、その先端部
（15a）を、ダイ（１）の上面を越えたところで、右方
のストッパ（17）に衝止させる。A strip material (15) of irregular cross-section having a semi-circular thick section at the front edge of the lower surface is guided by a pair of upper and lower guide plates (16a) (16b) and horizontally extruded from left to right. , The tip portion (15a) of the die (1) is made to hit the stopper (17) on the right side at a position beyond the upper surface of the die (1).
ついで、パンチ（６）を降下させて、帯材（15）の先
端部（15a）を所定の幅で切断し、かつこの切断された
ものを、パンチ（６）の凹溝（７）とダイ（１）の弧状
部（３）との間で、半円弧状にプレス成形する。Then, the punch (6) is lowered to cut the tip portion (15a) of the strip (15) to a predetermined width, and the cut piece is cut into the groove (7) of the punch (6) and the die. Between the arcuate part (3) and the arcuate part (3), press molding is performed in a semicircular arc shape.
この際、第６図で示すように、コッタ（８）の下面前
縁のピード部（8a）は、ダイ（１）の凹溝（４）に嵌合
し、かつ下面後縁（8b）は、1/4円弧状の円弧状面（5
a）によって、丸みを帯びた湾曲隅面（18）に形成され
る。At this time, as shown in FIG. 6, the bead portion (8a) of the lower edge of the cotter (8) fits into the groove (4) of the die (1), and the lower edge of the lower edge (8b) is , 1/4 circular arc surface (5
By a), it is formed into a rounded curved corner surface (18).
最後に、コッタ（８）の両側端部を、ダイ（１）の弧
状部両側下面にそれぞれ摺接する左右１対のカッター
（12）（12）で切断する。Finally, both end portions of the cotter (8) are cut by a pair of left and right cutters (12) (12) which are in sliding contact with the lower surfaces of both sides of the arcuate portion of the die (1).
本発明により製造されたコッタ（８）は、第７図に示
すように、一方の側端面の内周面の下縁に、正面視にお
いて1/4円弧状に湾曲する湾曲隅部（18）を有するもの
となっている。As shown in FIG. 7, the cotter (8) manufactured by the present invention has a curved corner (18) which is curved in a 1/4 arc shape in a front view at the lower edge of the inner peripheral surface of one side end surface. It has become.
したがって、このコッタ（８）を、自動組立機によ
り、エンジンバルブに組付ける際に、内周面下縁におけ
る湾曲隅部（18）が、エンジンバルブの軸外周面と円滑
に摺接して、組付けは、円滑かつ確実に行われる。Therefore, when this cotter (8) is assembled to an engine valve by an automatic assembly machine, the curved corner (18) at the lower edge of the inner peripheral surface smoothly slides against the shaft outer peripheral surface of the engine valve and is assembled. The attachment is smooth and reliable.
帯材（15）を出発材料とする代わりに、プレス等によ
り予め所要の寸法形状に切断した板材を素材としてもよ
い。Instead of using the band material (15) as a starting material, a plate material that is cut in advance into a desired size and shape by a press or the like may be used as a material.
なお、上述したコッタの製造方法の説明は、ビード部
を有する外抱き式のものについて行ったが、本発明は、
ビード部を有しない内抱き式のコッタについても適用で
きる。Although the above-described method for manufacturing the cotter has been described with respect to the outside embracing type having the bead portion, the present invention is
The present invention can also be applied to a hugging cotter having no bead portion.
板材をパンチとダイによるプレス成形の際に、コッタ
の側端面の内側の隅部が、同時に湾曲面とされるため、
湾曲隅部を形成するための後加工の必要はなくなる。When press-forming a plate material with a punch and a die, the inside corners of the side end surfaces of the cotter are simultaneously curved surfaces,
There is no need for post processing to form curved corners.
第１図は、本発明を実施するために使用される成形プレ
スの一部切欠縦断面図、 第２図は、第１図におけるパンチのみを示す拡大側面
図、 第３図は、同じく正面図、 第４図は、第１図におけるダイのみを示す拡大側面図、 第５図は、同じく正面図、 第６図は、コッタの成形状態を示す一部切欠縦断側面
図、 第７図は、コッタの一部切欠斜視図、 第８図は、従来方法により製造されたコッタの斜視図、 第９図は、従来のプレス成形の領域を示す概略斜視図、 第10図は、エンジンバルブへのコッタ組付け要領を説明
するための分解斜視図、 第11図ないし第13図は、エンジンバルブに対するコッタ
の組付け工程における各手順を示す縦断正面図、 第14図は、エンジンバルブに対するコッタの組付けが不
良である状態を示す縦断正面図である。 （１）ダイ （２）基部 （３）弧状突部 （４）凹溝 （５）大径部 （5a）円弧状面 （６）パンチ （７）凹溝 （８）コッタ （8a）ビード部 （９）プレス （10）パンチホルダー （11）ダイホルダー （12）カッター （13）駆動手段 （14）押出しピン （15）帯材 （16a）（16b）ガイド板 （17）ストッパ （18）湾曲隅部 （ａ）コッタ （ｂ）内周面 （ｃ）ビード部 （ｄ）パンチ （ｅ）ダイ （ｆ）帯材 （ｈ）耳片 （ｉ）カッター （ｊ）端面 （ｋ）隅部 （ｌ）エンジンバルブ （ｍ）ばね受け （ｎ）コッタ溝 （ｒ）内側隅部FIG. 1 is a partially cutaway longitudinal sectional view of a molding press used for carrying out the present invention, FIG. 2 is an enlarged side view showing only the punch in FIG. 1, and FIG. 4, FIG. 4 is an enlarged side view showing only the die in FIG. 1, FIG. 5 is a front view of the same, FIG. 6 is a partially cutaway vertical side view showing the molding state of the cotter, and FIG. FIG. 8 is a partially cutaway perspective view of a cotter, FIG. 8 is a perspective view of a cotter manufactured by a conventional method, FIG. 9 is a schematic perspective view showing a region of conventional press molding, and FIG. Fig. 11 to Fig. 13 are exploded perspective views for explaining the procedure for assembling the cotter. Figs. 11 to 13 are vertical sectional front views showing each step in the process of assembling the cotter to the engine valve. Fig. 14 is a cotter assembly to the engine valve. FIG. 6 is a vertical sectional front view showing a state in which attachment is defective. (1) Die (2) Base (3) Arc-shaped protrusion (4) Recessed groove (5) Large diameter part (5a) Arc surface (6) Punch (7) Recessed groove (8) Cotta (8a) Bead part ( 9) Press (10) Punch holder (11) Die holder (12) Cutter (13) Driving means (14) Extrusion pin (15) Strip material (16a) (16b) Guide plate (17) Stopper (18) Curved corner (A) cotter (b) inner peripheral surface (c) bead portion (d) punch (e) die (f) band material (h) ear piece (i) cutter (j) end surface (k) corner (l) engine Valve (m) Spring holder (n) Cutter groove (r) Inner corner
Claims (3)
面の弧状突部の末端に円弧状面を介して大径部を同心的
に連設したダイにおける前記弧状突部との間に板材を挿
入し、パンチとダイによりこの板材をプレス加工して半
円筒状に湾曲させ、ついでその両側端部を切断すること
を特徴とするエンジンバルブ用コッタの製造方法。1. A punch having a groove having a semicircular cross section, and the arcuate projection in a die in which a large diameter portion is concentrically connected to an end of the arcuate projection having the semicircular cross section through an arcuate surface. A method for manufacturing an engine valve cotter, comprising inserting a plate material in between, pressing the plate material with a punch and a die to bend it into a semi-cylindrical shape, and then cutting both side ends thereof.
材とする請求項（１）記載のエンジンバルブ用コッタの
製造方法。2. A method for manufacturing an engine valve cotter according to claim 1, wherein the strip material is cut into a plate material in a longitudinal direction with a predetermined width.
を有するものである請求項（１）又は（２）記載のエン
ジンバルブ用コッタの製造方法。3. The method for manufacturing an engine valve cotter according to claim 1, wherein the plate member has a thick portion on one side along the longitudinal direction thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63035025A JP2527990B2 (en) | 1988-02-19 | 1988-02-19 | Engine valve cotter manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63035025A JP2527990B2 (en) | 1988-02-19 | 1988-02-19 | Engine valve cotter manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01210233A JPH01210233A (en) | 1989-08-23 |
| JP2527990B2 true JP2527990B2 (en) | 1996-08-28 |
Family
ID=12430520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63035025A Expired - Fee Related JP2527990B2 (en) | 1988-02-19 | 1988-02-19 | Engine valve cotter manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2527990B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE112011105731B4 (en) * | 2011-10-13 | 2022-12-15 | Mitsubishi Electric Corporation | Wire electric discharge machine and wire electric electrode feeding method used therein |
-
1988
- 1988-02-19 JP JP63035025A patent/JP2527990B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01210233A (en) | 1989-08-23 |
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| Date | Code | Title | Description |
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| LAPS | Cancellation because of no payment of annual fees |