JPH01210233A - Manufacture of cotter for engine valve - Google Patents
Manufacture of cotter for engine valveInfo
- Publication number
- JPH01210233A JPH01210233A JP63035025A JP3502588A JPH01210233A JP H01210233 A JPH01210233 A JP H01210233A JP 63035025 A JP63035025 A JP 63035025A JP 3502588 A JP3502588 A JP 3502588A JP H01210233 A JPH01210233 A JP H01210233A
- Authority
- JP
- Japan
- Prior art keywords
- cotter
- engine valve
- punch
- die
- rounding
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 239000000463 material Substances 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims description 8
- 238000005452 bending Methods 0.000 claims 1
- 239000011324 bead Substances 0.000 abstract description 5
- 230000002093 peripheral effect Effects 0.000 abstract description 4
- 230000001154 acute effect Effects 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 241000255925 Diptera Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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)
Abstract
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。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of manufacturing a cotter to be assembled into 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, which is assembled into an automobile engine valve, is a truncated cone with a shaft hole, divided into two parts along the axis: left and right.
It consists of a pair of semi-cylindrical bodies.
また、第８図に示すように、コッタ（ａ）の内周面（ｂ
）の上縁には、半円断面形のビード部（Ｃ）が連設され
ている。Moreover, as shown in FIG. 8, the inner peripheral surface (b) of the cotter (a)
) is provided with a bead portion (C) having a semicircular cross section.
従来のコッタ（ａ）の製造は、例えば、次のようにして
行なわれている。The conventional cotter (a) is manufactured, for example, as follows.
まず、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）と対向するダイ（ｅ）の上に、薄肉部
（ｆ′）の−側に厚肉部（ｆ”）を有する異形断面形の
帯鋼板（ｆ）を側方より挿入し、これを所定の幅で切断
するとともに、プレス成形して、半円筒体（ｇ）に湾曲
させる。First, as shown in FIG. 9, a thick part (f A steel band plate (f) having an irregular cross-section having a diameter of 10 mm is inserted from the side, cut to a predetermined width, and press-formed to curve into a semi-cylindrical body (g).
ついで、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）で切断す
る。Next, key points of the side end (h) of this semi-cylindrical body (g) are
Cut with a pair of left and right cutters (i) placed close to each other from the sides.
従来のコッタの製造方法では、上述したように最終的に
カッター（コ）て側端部（ｈ）を切断するため、コッタ
（ａ）の両側端面（ｊ）の薄肉部の内側隅部（ｒ）か、
鋭角となってしまう。In the conventional cotter manufacturing method, as described above, the side ends (h) are finally cut using a cutter, so the inner corners (r )mosquito,
It becomes an acute angle.
そのため、第１０図に示すような、エンジンバルブ（ｆ
ｌ）のコツタ溝（ｎ）に、環状をなすはね受け（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, the engine valve (f
When the cotter (a) (a) inserted into the annular splash receiver (m) is attached to the cotter groove (n) of l) by an automatic machine, assembly defects may occur.
すなわち、コツタの組付は作業は、第１１図から第１３
図に示す順序で行なわれる。In other words, the work for assembling the kotta is from Figures 11 to 13.
This is done in the order shown in the figure.
ます、第１］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。1] In the inner hole of the spring receiver (m) as shown in the figure,
Fit the pair of cotters (a) and (a').
次に、第１２図示のように、エンジンバルブ（Ｑ）の」
二端部を下方よりコッタ（ａ）（ａ）間に進入させて、
両コッタ（ａ）（ａ）を持上げるとともに、逆ハの字形
に開かせる。Next, as shown in Figure 12, open the engine valve (Q).
Inserting the two ends from below between the cotters (a) and (a),
Lift up both cotters (a) and open them into an inverted V shape.
次に、第１３図示のようにエンジンバルブ（Ω）を下方
に引くと、コッタ（ａ）（ａ）は自重により滑落して、
その各ビート（ｃ）がコッタ溝（ｎ）に嵌合し、コッタ
（ａ）（ａ）はエンジンバルブ（Ｑ）に取付けられる。Next, when the engine valve (Ω) is pulled downward as shown in Figure 13, the cotter (a) (a) slides down due to its own weight.
Each beat (c) fits into a cotter groove (n), and the cotter (a) is attached to an engine valve (Q).
しかしながら、前述したように、コッタ（ａ）（ａ）の
側端面（ｊ）の下部内側の隅部（ｒ）か鋭角をなしてい
ると、コツタ（ａ ）（ａ）は、エンジンバルブ（Ｑ）
の外周面を円滑に摺動落丁せずに途中で引掛かり、適切
な組付けが行われなくなる。However, as mentioned above, if the lower inner corner (r) of the side end surface (j) of the cotter (a) (a) forms an acute angle, the cotter (a) (a) )
It does not slide smoothly on the outer circumferential surface of the machine and gets caught in the middle, making it impossible to assemble it properly.
本発明は、半円筒状のコッタの側端面の一端部内側隅部
を、プレス成形時に丸めうけして仕」−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。SUMMARY OF THE INVENTION The present invention provides a method for manufacturing a cotter for engine valves, in which an inner corner of one end of a side end surface of a semi-cylindrical cotter is rounded during press molding. .
本発明によるエンジンバルブ用コツタの製造方法は、半
円断面の溝を有するパンチと、半円断面の弧状部及び該
弧状部に同心状に連設された丸みつけ用曲面を有するダ
イとの間に板材を挿入し、プレス加工して、この板材を
半円筒状に湾曲させ、ついてその両側端部を切断してな
るものである。A method for manufacturing an engine valve socket according to the present invention is provided between a punch having a groove with a semicircular cross section and a die having an arcuate portion with a semicircular cross section and a rounding curved surface concentrically connected to the arcuate portion. A plate material is inserted into the cylinder, pressed, and then bent into a semi-cylindrical shape.Then, both ends of the plate are cut off.
パンチとダイによりブ！ノス成形されるコッタは、その
プレス成形時に、半円筒状のコッタの両側端面の一端部
内側隅部は、ダイの凹面に抑圧されて＝３−
丸みづけされる。By punch and die! When the cotter is press-molded, one inner corner of one end of both end surfaces of the semi-cylindrical cotter is pressed by the concave surface of the die and is rounded.
従って、コッタの側端部を切断した後にも、コッタの側
端面の内周側隅部は丸みづけされる。Therefore, even after cutting the side end portions of the cotter, the inner corner portions of the side end faces of the cotter are rounded.
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 explained with reference to the drawings.
第４図及び第５図に示す（１）はダイて、」二部（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」二面連設された上向き半円断
面の弧状部（３）とからなっている。(1) shown in Fig. 4 and Fig. 5 is a die.
) consists of a slightly thinner base (2) facing in the front-rear direction, and an arcuate part (3) with an upward semicircular cross section that is continuous on two sides from the upper end of the base (2).
弧状部（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 groove (4) having a semicircular cross section is formed in the middle portion of the upper surface of the arcuate portion (3) in the front-rear direction.
弧状部（３）の上面の後端部には、１７４円弧状の凹面
（５ａ）を介して、半円弧状の大径部（５）が、同軸的
に形成されている。A semi-circular arc-shaped large diameter section (5) is coaxially formed at the rear end of the upper surface of the arc-shaped section (3) via a 174-arc-shaped concave surface (5a).
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。The punch (6) shown in FIGS. 2 and 3 is a punch, and a groove (7) facing in the front-rear direction and having a semicircular cross section that becomes smaller in diameter toward the rear is formed on the lower surface of the punch.
欣に、前記タイ（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。The method of manufacturing a cotter (8) as shown in FIGS. 6 and 7 using the tie (1) and punch (6) will now be explained.
第１図に示すように、パンチ（６）を、プレス（９）の
パンチホルダー（１０）に固定し、かつタイ（］−）を
、その弧状部（３）を」三方として、ダイホルダー（１
］）に数個ける。As shown in Fig. 1, the punch (6) is fixed to the punch holder (10) of the press (9), and the tie (]-) is connected to the die holder ( 1
]).
なお、第１図における（１２）は、左右１対をなすカッ
ターで、駆動手段（１３）によって水平方向に往復動さ
せられる。In addition, (12) in FIG. 1 is a pair of left and right cutters, which are reciprocated in the horizontal direction by a driving means (13).
（１４）は、左右１組の」二向き押出しビンである。(14) is a set of two-way push-out bottles, one on the left and one on the left.
下面前縁に半円断面をなす厚丙部を有する異形断面の帯
材（１５）を、」二部１対のガイド板（］、６ａ）（１
，６ｂ）＆こより案内し、左方より水平に押出し、その
先端部（］、５ａ）を、ダイ（１）の」二面を越えたと
ころで、右方のス１−ツバ（１７）に衝止させる。A band material (15) with an irregular cross section having a semi-circular cross-sectional thick part on the front edge of the lower surface is assembled into two parts and one pair of guide plates (], 6a) (1).
, 6b) & extrude horizontally from the left side, and when the tip (], 5a) passes over the two sides of the die (1), impact it against the right side flange (17). make it stop
ついて、パンチ（６）を降下させて、帯材（１５）の先
端部（１，５ａ）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 (1, 5a) of the strip material (15) to a predetermined width, and the cut material is inserted into the groove (7) of the punch (6). and the arc-shaped part (3) of the die (1), press forming into a semi-circular arc shape.
この際、第６図に明示したように、コツタ（８）の下面
前縁のビード部（８ａ）は、ダイ（１）の溝（４）に嵌
合し、下面後縁（８ｂ）は、想像線で示す隅部が丸みづ
け用の凹面（５ａ）によって、丸みを帯びた面１〜り部
すなわち曲面（１８）が形成される。At this time, as clearly shown in FIG. 6, the bead portion (8a) at the front edge of the lower surface of the cutter (8) fits into the groove (4) of the die (1), and the rear edge (8b) of the lower surface fits into the groove (4) of the die (1). The concave surface (5a) for rounding the corner shown by the imaginary line forms a rounded surface 1--that is, a curved 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（１
２）（２２）で切断する。Finally, place the ends of the cotter (8) into a pair of left and right cutters (1
2) Cut at (22).
本発明によるコツタの製造方法により製造されたコッタ
（８）は、一方の側端面の一部を拡大して示すように、
内周面の下縁、および側端面の内側隅部は、正面視が曲
面（１８）となっている。As shown in an enlarged view of a part of one side end surface, the cotter (8) manufactured by the cotter manufacturing method according to the present invention has the following features:
The lower edge of the inner circumferential surface and the inner corner of the side end surface are curved surfaces (18) when viewed from the front.
したがって、コツタ（８）は、前述したような自動組立
機により、エンジンバルブに組付ける際には、丸みづけ
された隅部が、エンジンバルブの軸外周面と円滑に摺接
して、組付は動作は確実に行われる。Therefore, when the cotter (8) is assembled to the engine valve using the automatic assembly machine as described above, the rounded corners smoothly slide into contact with the outer peripheral surface of the shaft of the engine valve, and the assembly is completed. The operation is performed reliably.
帯材（Ｉ５）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実施
してもよい。Instead of using the strip material (I5) as a starting material, a plate material previously cut into a desired size and shape by a press or the like may be used as the 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ツタについても適用でき
る。Although the method for manufacturing the cotter described above has been described with respect to an outside-hugging type cotter having a bead portion, the present invention can also be applied to an inside-hugging type cotter having no bead portion.
本発明によるエンジンバルブ用コッタの製造方法によれ
ば、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、同時に丸みづけされるため
、丸みづけのための後加工を必要としない利点がある。According to the method for manufacturing a cotter for engine valves according to the present invention, when press forming a plate material using a punch and die, the inner corner of the side end surface of the cotter is rounded at the same time. It has the advantage of not requiring any processing.
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図のパンチのみを示す側面図、第３図は
、同じく正面図、
第４図は、第１図のダイのみを示す側面図、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面図、
第７図は、コツ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、従来のプレス成形方法を示す概略斜視図、
第１０図は、エンジンバルブへのコッタ組付けを説明す
るための斜視図、
第１１図ないし第１３図は、コッタの組付は工程におけ
る各手順を示す一部切欠縦断側面、第１４図は、組付は
不良の状態を示す一部切欠縦断面図である。
（１）ダイ （２）基部
（３）弧状部 （４）凹溝
（５）大径部 （５ａ）凹面（６）パンチ
（７）凹溝
（８）コッタ （９）プレス（１０）パンチ
ホルダー （１１）ダイホルダー（Ｉ２）カッター
（Ｉ３）駆動手段（１４）押出しピン
（１５）帯材（１６ａ） （１６ｂ）ガイＩく板 （
１７）ストッパ（１８）曲面 （ａ）コッ
タ（ｂ）内周面 （ｃ）ビート部（ｄ）パン
チ （ｅ）ダイ
（ｆ）帯材 （ｈ）耳片
（ｉ）カッター （ｊ）端面FIG. 1 is a partially cutaway vertical sectional view of a forming press used to carry out the present invention, FIG. 2 is a side view showing only the punch in FIG. 1, and FIG. 3 is a front view, FIG. 4 is a side view showing only the die in FIG. 1, and FIG. 5 is a side view showing only the die in FIG.
Similarly, it is a front view, FIG. 6 is a partially cutaway vertical sectional view showing the molded state of the cotter, FIG. 7 is a partially cutaway perspective view of the cotter, and FIG. 8 is a perspective view of the cotter manufactured by the conventional method. , Fig. 9 is a schematic perspective view showing the conventional press forming method, Fig. 10 is a perspective view for explaining the assembly of the cotter to the engine valve, and Figs. 11 to 13 are the assembling of the cotter. 14 is a partially cutaway longitudinal sectional view showing each step in the process, and FIG. 14 is a partially cutaway longitudinal sectional view showing a state where the assembly is defective. (1) Die (2) Base (3) Arc-shaped part (4) Concave groove (5) Large diameter part (5a) Concave surface (6) Punch
(7) Concave groove (8) Cotta (9) Press (10) Punch holder (11) Die holder (I2) Cutter
(I3) Drive means (14) Push-out pin
(15) Band material (16a) (16b) Guy I board (
17) Stopper (18) Curved surface (a) Cotter (b) Inner peripheral surface (c) Beat part (d) Punch (e) Die (f) Strip (h) Ledge (i) Cutter (j) End surface
Claims (3)
部及び該弧状部に同心状に連設された丸みづけ用曲面を
有するダイとの間に板材を挿入し、プレス加工して、こ
の板材を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 plate material is inserted between a punch having a groove with a semicircular cross section and a die having an arcuate portion with a semicircular cross section and a curved surface for rounding concentrically connected to the arcuate portion, and press processing is performed. A method for producing a cotter for an engine valve, which comprises: bending the plate material into a semi-cylindrical shape, and then cutting both ends thereof.
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) The method for manufacturing an engine valve cotter according to claim (1), wherein the strip material is cut into a plate material with a predetermined width in the longitudinal direction.
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) or (2), wherein the band material has a thick wall portion on one side along its longitudinal direction.
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 true JPH01210233A (en) | 1989-08-23 |
| JP2527990B2 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) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9522434B2 (en) * | 2011-10-13 | 2016-12-20 | Mitsubishi Electric Corporation | Wire electric discharge machine and wire electrode forwarding method used in the same |
-
1988
- 1988-02-19 JP JP63035025A patent/JP2527990B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9522434B2 (en) * | 2011-10-13 | 2016-12-20 | Mitsubishi Electric Corporation | Wire electric discharge machine and wire electrode forwarding method used in the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2527990B2 (en) | 1996-08-28 |
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