JPH0459175A - Manufacture of engine valve or the like - Google Patents
Manufacture of engine valve or the likeInfo
- Publication number
- JPH0459175A JPH0459175A JP17013690A JP17013690A JPH0459175A JP H0459175 A JPH0459175 A JP H0459175A JP 17013690 A JP17013690 A JP 17013690A JP 17013690 A JP17013690 A JP 17013690A JP H0459175 A JPH0459175 A JP H0459175A
- Authority
- JP
- Japan
- Prior art keywords
- build
- valve
- pressing
- engine valve
- pressing means
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 238000003825 pressing Methods 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 19
- 238000003466 welding Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 7
- 239000010953 base metal Substances 0.000 claims description 2
- 238000003754 machining Methods 0.000 abstract description 12
- 239000002184 metal Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 5
- 235000013372 meat Nutrition 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 229910000967 As alloy Inorganic materials 0.000 description 1
- 229910001347 Stellite Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- AHICWQREWHDHHF-UHFFFAOYSA-N chromium;cobalt;iron;manganese;methane;molybdenum;nickel;silicon;tungsten Chemical compound C.[Si].[Cr].[Mn].[Fe].[Co].[Ni].[Mo].[W] AHICWQREWHDHHF-UHFFFAOYSA-N 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000012255 powdered metal Substances 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
Landscapes
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、弁フェース部等に、硬質かつ高耐摩耗性を有
する盛金材料を肉感溶接してなるエンジンバルブ等の製
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 an engine valve, etc., which is formed by welding a hard and highly wear-resistant overlay material to a valve face or the like.
エンジンバルブの弁フェース部は、高負荷、高サイクル
の繰返し荷重を受けるため、母材単体の強度では著しく
摩耗する。The valve face portion of an engine valve is subject to repeated high load and high cycle loads, so it will wear out significantly if the strength of the base material alone is not sufficient.
そのため、弁フェース部に、硬質かつ高耐摩耗性の盛金
材料、例えばＣｏ、Ｃｒ、Ｗ系からなるステライト等の
合金粉末を肉盛溶接して、耐摩耗性を高めるようにして
いる。Therefore, a hard and highly wear-resistant overlay material, such as alloy powder such as Co, Cr, and W-based stellite, is welded to the valve face portion to increase the wear resistance.
このようなエンジンバルブは、通常、第４図〜第７図に
略示する工程を経て製造される。Such engine valves are normally manufactured through the steps schematically shown in FIGS. 4 to 7.
すなわち、まずプレス工程により、第４図に示すような
エンジンバルブ（１）の原形品を成形したのち、第５図
に示すように、機械加工をもって、傘部（１ａ）の弁フ
ェース部（ｌｂ）に肉盛り用の環状凹溝（１ｃ）を形成
する。That is, first, a prototype engine valve (1) as shown in FIG. 4 is formed by a pressing process, and then, as shown in FIG. 5, the valve face part (lb) of the umbrella part (1a) is ) is formed with an annular groove (1c) for build-up.
ついで、第６図に示すように、エンジンバルブ（１）の
傘部（１ａ）を、プラズマ溶接装置における傾斜させた
回転台（２）上に載置して、一定方向に回転させつつ、
弁フェース部（１ｂ）の直上に臨ませたトーチ（３）の
先端より、プラズマアーク（４）を発生させると同時に
、粉末状の盛金材料（５）を供給し、アーク熱により盛
金材料（５）と弁フェース部（１ｂ）の表層を溶融させ
ながら、環状凹溝（ＩＣ）の全面に肉盛り（６）を施す
。Next, as shown in FIG. 6, the umbrella part (1a) of the engine valve (1) is placed on the inclined rotary table (2) of the plasma welding apparatus, and while being rotated in a certain direction,
A plasma arc (4) is generated from the tip of the torch (3) facing directly above the valve face (1b), and at the same time, powdered metal filling material (5) is supplied, and the metal filling material is heated by the arc heat. While melting (5) and the surface layer of the valve face portion (1b), build-up (6) is applied to the entire surface of the annular groove (IC).
最後に、第７図に示すように、肉盛り（６）後の、弁フ
ェース部（１ｂ）を、再度機械加工して、テーパ状の平
滑なフェース面（１ｄ）に仕上げる。Finally, as shown in FIG. 7, the valve face portion (1b) after the build-up (6) is machined again to form a tapered and smooth face surface (1d).
上記環状凹溝（ｌｃ）への肉盛り（６）は、通常、第６
図、及び第７図の想像線で示すように、仕上加工により
形成される規定のフェース面（１ｄ）の高さ以上に盛り
上げて行われるのが一般的である。The build-up (6) in the annular groove (lc) is usually the sixth
As shown by the imaginary lines in FIG. 7 and FIG. 7, it is common to raise the face surface to a height higher than the specified height of the face surface (1d) formed by finishing.
このような過剰な肉盛りを行なうと、仕上げ加工時の切
削代が大となり、加工時間が長くなって生産性を低下さ
せたり、多くの切粉が発生したり、切削抵抗が増大して
、バイトの寿命を低下させたりするなどの問題が生じる
。If such excessive overlaying is performed, the cutting allowance during finishing machining becomes large, machining time increases, productivity decreases, a lot of chips are generated, cutting resistance increases, and so on. Problems such as reducing the lifespan of the cutting tool arise.
また、高価でかつ価格変動の大きいコバルトを多量に含
む盛金材料の消費量が増えるため、その分歩留まりが低
下して、製造コストが上昇する。Furthermore, the consumption of metallization material containing a large amount of cobalt, which is expensive and whose price fluctuates widely, increases, resulting in a corresponding decrease in yield and an increase in manufacturing costs.
本発明は、上記問題点を解決するためになされたもので
、肉盛り部をフェース面の仕上がり形状に近ずけること
により、切削代を最小限とし５もって、生産性及び歩留
まりを向上させて、製造コストの低減が図れるようにし
た、エンジンバルブ等の製造方法を提供することを目的
としている。The present invention has been made to solve the above-mentioned problems, and by bringing the built-up portion closer to the finished shape of the face surface, the cutting allowance is minimized5, thereby improving productivity and yield. It is an object of the present invention to provide a method of manufacturing engine valves, etc., which enables reduction of manufacturing costs.
上記目的は、エンジンバルブ（１）の弁フェース部（ｌ
ｂ）等に形成された環状凹溝（１ｃ）に、母材と異なる
盛金材料（５）を、適宜の肉盛溶接装置により肉盛溶接
した直後に、押圧手段（９）により未硬化の肉盛り（６
）部を押圧して、規定のフェース面とほぼ等しい高さの
平坦面とすることにより達成することができる。The above purpose is to improve the valve face (l) of the engine valve (1).
Immediately after overlay welding the overlay material (5) different from the base metal into the annular groove (1c) formed in the annular groove (1c) etc. using an appropriate overlay welding device, unhardened metal is applied using a pressing means (9). Assorted meat (6
This can be achieved by pressing the portion ) to form a flat surface with a height approximately equal to the prescribed face surface.
好ましくは、上記押圧手段は押圧ローラとするのがよい
。Preferably, the pressing means is a pressing roller.
過剰に肉盛りするのが防止されるので、その後の肉盛り
（６）部の機械加工が容易となり、加工時間を著しく短
縮しうる。Since excessive build-up is prevented, subsequent machining of the build-up portion (6) becomes easy, and machining time can be significantly shortened.
また、盛金材料（５）が節約されるので１歩留まりが向
上する。Furthermore, since the metal filling material (5) is saved, the yield rate is improved.
以下、本発明の一実施例を、図面に基づいて説明する。 Hereinafter, one embodiment of the present invention will be described based on the drawings.
なお、第４図〜第７図に示す従来例と同様の部材には、
同じ符号を付して説明する。In addition, the members similar to the conventional example shown in FIGS. 4 to 7 include:
The same reference numerals will be used to explain.
まず、前工程において弁フェース部（１ｂ）に環状凹溝
（１ｃ）が形成されたエンジンバルブ（１）の傘部（１
ａ）を、前述した従来例と同様のプラズマ溶接装置の回
転台（２）に載置して、平面視反時計方向に回転させつ
つ、弁フェース部（ｌｂ）の直上に臨ませたトーチ（３
）の先端より、不活性シールドガスとともにプラズマア
ーク（４）を発生させ、かつ同時に、粉末状の盛金材料
（５）を供給して、環状凹溝（１ｃ）に肉盛溶接を開始
する。First, the umbrella part (1) of the engine valve (1), in which the annular groove (1c) was formed in the valve face part (1b) in the previous process
a) was placed on the turntable (2) of the plasma welding apparatus similar to the conventional example described above, and while rotating counterclockwise in plan view, the torch (a) was placed directly above the valve face (lb). 3
), a plasma arc (4) is generated along with an inert shielding gas, and at the same time, a powdered overlay material (5) is supplied to start overlay welding in the annular groove (1c).
ついで、肉盛り（６）部がまだ硬化しない可塑状態、好
ましくは半溶融状態にある間に、トーチ（３）に近接す
るとともに、環状凹溝（１ｃ）に向かって上下動可能に
設けられた、エアシリンダ（７）と、そのピストンロッ
ド（７ａ）の下端に、ブラケット（８）をもって枢支さ
れた耐熱性の押圧ローラ（９）とからなる押圧装置（１
０）における押圧ローラ（９）を、第２図示のように、
その下端面が、環状凹溝（１ｃ）の上端縁、すなわち予
め定められた規定のフェース面（１１）の高さとほぼ同
等か、それよりも若干高い位置となるまで下降させ、上
記肉盛り（６）の上面を、フェース面の仕上がり形状に
近いテーパ状の平坦面に予備成形する。Next, while the built-up part (6) is still in an unhardened plastic state, preferably in a semi-molten state, it approaches the torch (3) and is provided so as to be movable up and down toward the annular groove (1c). , a pressing device (1) consisting of an air cylinder (7) and a heat-resistant pressing roller (9) pivotally supported by a bracket (8) at the lower end of its piston rod (7a).
0), as shown in the second figure,
It is lowered until its lower end surface is at a position approximately equal to or slightly higher than the upper end edge of the annular groove (1c), that is, the predetermined specified face surface (11), and then 6) Preform the upper surface into a tapered flat surface close to the finished shape of the face surface.
この押圧時において、肉盛り（６）部の表層の余剰肉は
、ワークの回転と反対方向、すなわちトーチ（３）側に
向かってしごかれ、トーチ（３）により再溶融されて、
環状凹溝（１ｃ）に溶着される。During this pressing, the excess meat on the surface layer of the build-up (6) is squeezed in the opposite direction to the rotation of the workpiece, that is, toward the torch (3), and is remelted by the torch (3).
It is welded to the annular groove (1c).
押圧ローラ（９）により肉盛り（６）部を押圧した状態
のまま、引き続き溶接を続行し、エンジンバルブ（１）
が１回転する直前において、トーチ（３）への盛金材料
（５）の供給を停止して、プラズマアーク（４）のみを
発生させ、環状凹溝（１ｃ）における残りの未溶接部分
に、順次しごかれて流動してくる余剰肉を溶着させて、
環状凹溝（１ｃ）の全面に肉盛り（６）を施す。Welding continues with the pressure roller (9) pressing the build-up (6), and the engine valve (1)
Immediately before one rotation, the supply of the metal filling material (5) to the torch (3) is stopped, and only the plasma arc (4) is generated to cover the remaining unwelded portion of the annular groove (1c). The excess meat that flows as it is squeezed out is welded together,
Filling (6) is applied to the entire surface of the annular groove (1c).
最後に、肉盛り（６）部の表面を５機械加工により切削
又は研削して、テーパ状の規定のフェース面（１１）に
仕上げる。Finally, the surface of the built-up part (6) is cut or ground by 5 machining processes to finish it into a specified tapered face surface (11).
以上説明したように、肉盛り（６）部を押圧ローラ（９
）により押圧して、フェース面の仕上がり形状に近い平
坦面とすると、機械加工時の切削代が最小限となり、加
工時間が短縮されて生産性が高まるとともに、切粉等の
発生量が少なく、かつバイト等の寿命も延びる。As explained above, the press roller (9)
) to create a flat surface close to the finished shape of the face surface, the cutting allowance during machining is minimized, machining time is shortened, productivity is increased, and the amount of chips etc. generated is reduced. Also, the life of the tool, etc. is extended.
また、エンジンパル１１個当たりに要する盛金材料（５
）の量が少なくて済むので、量産時における盛金材料の
大幅節約となり、歩留まりが向上してコスト低減が図れ
る。In addition, the metal filling material required per 11 engine pals (5
), it is possible to significantly save metal filling materials during mass production, improve yields, and reduce costs.
さらに、押圧時において、溶接時に混入した気泡等が押
し出されて外部に排出されるので、ピンホール等の内部
欠陥を発生させる恐れがない。Furthermore, during pressing, air bubbles and the like mixed in during welding are pushed out and discharged to the outside, so there is no risk of internal defects such as pinholes occurring.
なお、上記実施例では、押圧手段に押圧ローラ（９）を
用いたが、これに代えて、上部を若干トーチ（３）側に
傾斜させたかき寄せ板（図示時）等を用いてもよい。In the above embodiment, the pressing roller (9) is used as the pressing means, but instead of this, a scraping plate (as shown) whose upper portion is slightly inclined toward the torch (3) may be used.
本発明方法は、シート部に肉盛りが施されたバルブシー
トを製造する際にも適用しろる。The method of the present invention can also be applied to manufacturing a valve seat whose seat portion is padded.
本発明方法によれば、肉盛り（６）部を、規定のフェー
ス面とほぼ同等の形状としうるので、その後の弁フェー
ス部（１ｂ）の機械加工が容易となり、生産性を大幅に
高めうる。According to the method of the present invention, the built-up portion (6) can be made into a shape that is almost the same as the specified face surface, so that subsequent machining of the valve face portion (1b) is facilitated, and productivity can be greatly increased. .
また、過剰に肉盛りされるのが防止されるので、盛金材
料（５）の歩留まりが向上し、エンジンバルブのコスト
低減が図れる。Further, since excessive overlaying is prevented, the yield of the overlaying material (5) is improved, and the cost of the engine valve can be reduced.
４、図面の簡単説明
第１図は、本発明方法の一実施例の製造要領を示す概略
正面図、
第２図は、第１図における■−■線に沿う要部の拡大縦
断側面図、
第３図は、同じ＜ｍ−ｍ線に沿う要部の拡大横断平面図
、
第４図は、従来方法に用いられるプレス成形後のエンジ
ンバルブの正面図、
第５図は、同じく弁フェース部に環状凹溝を形成した状
態を示す傘部の切欠正面図、
第６図は、同じく環状凹溝にプラズマ溶接装置により肉
盛溶接する際の説明図、
第７図は、同じく肉盛り部を機械加工により規定のフェ
ース面とした状態を示す傘部の切欠正面図である。4. Brief explanation of the drawings FIG. 1 is a schematic front view showing the manufacturing procedure of an embodiment of the method of the present invention, FIG. 2 is an enlarged longitudinal sectional side view of the main part along the line ■-■ in FIG. 1, Fig. 3 is an enlarged cross-sectional plan view of the main parts along the same <m-m line, Fig. 4 is a front view of the engine valve after press forming used in the conventional method, and Fig. 5 is the same valve face part. FIG. 6 is an explanatory view of the annular groove being overlay welded using a plasma welding device; FIG. FIG. 3 is a cutaway front view of the umbrella section showing a state where a specified face surface is formed by machining.
第１ 図 （１）エンジンバルブ （１ｂ）弁フェース部 （２）回転台 （４）プラズマアーク （６）肉盛り （７ａ）ピストンロッド （９）押圧ローラ（押圧手段） （１０）押圧装置 （１ａ）傘部 （１ｃ）環状凹溝 （３）トーチ （５）盛金材料 （７）エアシリンダ （８）ブラケット （１１）フェース面 第２図 １に３図Figure 1 (1) Engine valve (1b) Valve face part (2) Turntable (4) Plasma arc (6) Meat platter (7a) Piston rod (9) Press roller (pressing means) (10) Pressing device (1a) Umbrella part (1c) Annular groove (3) Torch (5) Filling material (7) Air cylinder (8) Bracket (11) Face surface Figure 2 1 to 3 figures
Claims (2)
状凹溝に、母材と異なる盛金材料を、適宜の肉盛溶接装
置により肉盛溶接した直後に、押圧手段により未硬化の
肉盛り部を押圧して、規定のフェース面とほぼ等しい高
さの平坦面とすることを特徴とするエンジンバルブ等の
製造方法。(1) Immediately after overlaying an overlay material different from the base metal into the annular groove formed on the valve face of the engine valve using an appropriate overlay welding device, unhardened overlay is applied using a pressing means. A method of manufacturing an engine valve, etc., characterized in that the part is pressed to form a flat surface with approximately the same height as a specified face surface.
した位置に設けた押圧ローラである請求項（１）記載の
エンジンバルブ等の製造方法。(2) The method for manufacturing an engine valve or the like according to claim (1), wherein the pressing means is a pressing roller provided in a position close to a torch in an overlay welding device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17013690A JPH0459175A (en) | 1990-06-29 | 1990-06-29 | Manufacture of engine valve or the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17013690A JPH0459175A (en) | 1990-06-29 | 1990-06-29 | Manufacture of engine valve or the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0459175A true JPH0459175A (en) | 1992-02-26 |
Family
ID=15899330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17013690A Pending JPH0459175A (en) | 1990-06-29 | 1990-06-29 | Manufacture of engine valve or the like |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0459175A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102510676A (en) * | 2011-10-20 | 2012-06-20 | 东莞生益电子有限公司 | Method for adding teardrop in printed circuit board (PCB) during computer aided manufacturing (CAM) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56151171A (en) * | 1980-04-25 | 1981-11-24 | Mitsubishi Motors Corp | Method for finishing of build-up welded article |
| JPS6127174A (en) * | 1984-07-17 | 1986-02-06 | Mitsubishi Heavy Ind Ltd | Method for hardening padding part of valve |
-
1990
- 1990-06-29 JP JP17013690A patent/JPH0459175A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56151171A (en) * | 1980-04-25 | 1981-11-24 | Mitsubishi Motors Corp | Method for finishing of build-up welded article |
| JPS6127174A (en) * | 1984-07-17 | 1986-02-06 | Mitsubishi Heavy Ind Ltd | Method for hardening padding part of valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102510676A (en) * | 2011-10-20 | 2012-06-20 | 东莞生益电子有限公司 | Method for adding teardrop in printed circuit board (PCB) during computer aided manufacturing (CAM) |
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