JPH05146921A - Manufacture of titanium alloy valve - Google Patents
Manufacture of titanium alloy valveInfo
- Publication number
- JPH05146921A JPH05146921A JP15485091A JP15485091A JPH05146921A JP H05146921 A JPH05146921 A JP H05146921A JP 15485091 A JP15485091 A JP 15485091A JP 15485091 A JP15485091 A JP 15485091A JP H05146921 A JPH05146921 A JP H05146921A
- Authority
- JP
- Japan
- Prior art keywords
- titanium alloy
- alloy valve
- tip
- valve
- shape
- 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.)
- Withdrawn
Links
Landscapes
- Heat Treatment Of Articles (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、自動２輪車及びその他
の車輛のエンジンに使用するチタン合金バルブの先端部
の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a tip end portion of a titanium alloy valve used for an engine of a motorcycle and other vehicles.
【０００２】[0002]
【従来の技術】これまでに、チタン合金バルブは、競争
用自動車エンジンに適用されている。バルブの外観は図
１に示すような外観形状を有しているが、その先端部ａ
は、神戸製鋼技報ｖｏｌ．１８，No．４，３６頁に開示
されているように、チタン合金側をＮｉメッキしてから
Ｃｏ−Ｃｒ−Ｗ系合金（ステライト＃１）のチップをろ
う付けして構成されている。2. Description of the Prior Art Titanium alloy valves have hitherto been applied to competitive automobile engines. The external appearance of the valve has an external shape as shown in FIG.
Is Kobe Steel Technical Report vol. 18, No. As disclosed on pages 4 and 36, the titanium alloy side is plated with Ni, and then Co-Cr-W alloy (Stellite # 1) chips are brazed.
【０００３】[0003]
【発明が解決しようとする課題】Ｃｏ−Ｃｒ−Ｗ系合金
棒（ステライト＃１）は、再溶融され肉盛りする材料
で、そのまま使用すると、凝固収縮にともなう内部欠陥
が多くなり、従って歩留が低い。また７００Hvと硬質の
ため、加工が難しい。ろう付けするためには、チタン合
金側のＮｉメッキが不可欠であるが、Ｎｉメッキ前にフ
ッ酸酸洗などの前処理を実施する等、多くの工程が必要
である。The Co-Cr-W alloy rod (Stellite # 1) is a material that is remelted and built up. If it is used as it is, internal defects due to solidification shrinkage increase, and therefore the yield is increased. Is low. In addition, it is hard at 700 Hv, making it difficult to process. Ni plating on the titanium alloy side is indispensable for brazing, but many steps such as performing pretreatment such as hydrofluoric acid pickling before Ni plating are necessary.
【０００４】本発明はこのような従来の問題点を解消す
るものであり、、チタン合金バルブの先端部に鋼製チッ
プ部材を極めて簡易な工程で、接合する方法を提供する
ものである。The present invention solves the above-mentioned conventional problems, and provides a method of joining a steel chip member to the tip of a titanium alloy valve by a very simple process.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に本発明は、耐摩耗性の優れた焼き入れ硬化可能な鋼製
チップ状部材を、あらかじめ所定の寸法に加工後、焼き
入れ硬化せしめこのチップ部材をチタン合金バルブの先
端部に冷間圧入することを特長とするチタン合金バルブ
の先端部の製造方法を要旨とする。In order to achieve the above-mentioned object, the present invention is to quench-harden a steel chip-shaped member capable of quenching and hardening, which is excellent in wear resistance, into a predetermined dimension, and then quench-hardening it. The gist is a method for manufacturing a tip portion of a titanium alloy valve, which is characterized in that the tip member is cold press-fitted into the tip portion of the titanium alloy valve.
【０００６】[0006]
【作用】以下に本発明を詳細に説明する。本発明におい
て耐摩耗性の優れた鋼は、工具鋼や０．５％程度の炭素
を含有する機械構造用鋼（Ｃｒ−Ｍｏ鋼）、耐熱鋼等の
焼き入れ硬化の可能な鋼である。これらは圧延線材とし
て供給されており、内部欠陥が少なく、焼き入れ前の軟
質状態で加工するため容易に加工できる。The present invention will be described in detail below. In the present invention, the steel having excellent wear resistance is a steel that can be hardened by quenching, such as tool steel, steel for machine structure (Cr-Mo steel) containing about 0.5% carbon, heat-resistant steel and the like. These are supplied as rolled wire rods, have few internal defects, and can be easily processed because they are processed in a soft state before quenching.
【０００７】圧入の方法は、例えばチタン合金バルブ１
の軸部６の先端部ａを、図２に示すように加工し、凹部
雌形２を形成し、図３に示すような突部雄形３を有する
鋼製チップ４を加工成形して、前記雌形２に雄形３を圧
入する。ここでチップの突部雄形３の径をチタン合金バ
ルブ先端部雌形２の穴径よりも３０μｍ大きくしてあ
る。雌−雄形径差が８０μｍを超えると圧入が困難とな
る。また雄形３の先端に突起５（０．５mm長さ、２．９
５０φ）を設けているが、これは、圧入時にチップ４を
チタン合金バルブの雄形３に垂直に設置することができ
るようガイドの役を果たし、これによって圧入を容易に
している。また雌形２の頂部及び雄形３のつけ根の角
６，７は、疲労強度を増すためにＲ１．０mmとしてあ
る。ここで焼き入れ硬化後、圧入するのは、焼き入れし
ないものを圧入すると、雌形２の穴に入る雄形３の突部
の表面が雌形穴側面とすれあい塑性変形し、径が一部太
くなり、圧入できなくなるためである。The press-fitting method is, for example, a titanium alloy valve 1
2 is machined as shown in FIG. 2 to form the concave female shape 2, and the steel chip 4 having the protruding male shape 3 as shown in FIG. 3 is machined. The male shape 3 is press-fitted into the female shape 2. Here, the diameter of the male protrusion 3 of the tip is set to be 30 μm larger than the diameter of the hole of the female titanium alloy valve tip 2. When the female-male diameter difference exceeds 80 μm, press-fitting becomes difficult. In addition, a protrusion 5 (0.5 mm long, 2.9
50 φ) is provided, which serves as a guide so that the tip 4 can be vertically installed on the male shape 3 of the titanium alloy valve at the time of press fitting, thereby facilitating the press fitting. The corners 6 and 7 of the top of the female shape 2 and the root of the male shape 3 are set to R1.0 mm in order to increase fatigue strength. Here, after quenching and hardening, press-fitting is performed by pressing in a non-quenched material. The surface of the protrusion of the male shape 3 that enters the hole of the female shape 2 is plastically deformed by contact with the side surface of the female hole, resulting in a uniform diameter. This is because the part becomes thicker and press-fitting becomes impossible.
【０００８】[0008]
（実施例１）Ｔｉ−５Ａｌ−２．５Ｓｎ，Ｔｉ−８Ａｌ
−１Ｍｏ−１Ｖ，Ｔｉ−６Ａｌ−２Ｓｎ−４Ｚｒ−２Ｍ
ｏ製のチタン合金バルブ先端部を図２に示すように加工
し、ＪＩＳ規格，ＳＫ２，ＳＣＭ４４０，ＳＵＨ１１を
図３に示すように加工してチップを形成した。(Example 1) Ti-5Al-2.5Sn, Ti-8Al
-1Mo-1V, Ti-6Al-2Sn-4Zr-2M
The tip of the titanium alloy valve made of o was processed as shown in FIG. 2, and JIS standard, SK2, SCM440, and SUH11 were processed as shown in FIG. 3 to form a chip.
【０００９】ＳＫ２，ＳＣＭ４４０，ＳＵＨ１１よりな
る各チップ３を硬度が７００Hv前後になるように各々焼
き入れ処理した後、該チップ雄形３をチタン合金バルブ
先端部の雌形２に圧入した。本チタン合金バルブをロッ
カーアーム式の４気筒エンジンを用い、６０２８RPM に
て５００時間試験したところ、ＳＫ２，ＳＣＭ４４０，
ＳＵＨ１１の先端部の摩耗量は現行のＳＵＨ１１製の先
端部を高周波焼き入れしたものと同程度の摩耗量であ
り、実用上全く問題のないことを確認した。Each of the chips 3 made of SK2, SCM440, and SUH11 was quenched so that the hardness was about 700 Hv, and then the male mold 3 of the chips was press-fitted into the female mold 2 at the tip of the titanium alloy valve. When this titanium alloy valve was tested for 500 hours at 6028 RPM using a rocker arm type four cylinder engine, SK2, SCM440,
The amount of wear of the tip of SUH11 was about the same as that of the current SUH11 made by induction hardening, and it was confirmed that there was no problem in practice.
【００１０】[0010]
【発明の効果】チタン合金バルブの先端部に対してこれ
まで、簡便な製造方法がなかったが、本発明によれば、
焼き入れ硬化可能な耐摩耗性の優れた鋼製チップ状部材
と冷間圧入する簡便な方法で耐摩耗性を有する先端部を
製造できる。According to the present invention, there has been no simple manufacturing method for the tip of the titanium alloy valve.
It is possible to manufacture a tip portion having wear resistance by a simple method of quench-hardening and a steel chip-shaped member having excellent wear resistance and cold press fitting.
【図１】バルブの形状を示す側面図。FIG. 1 is a side view showing the shape of a valve.
【図２】チタン合金バルブの先端部のはめこみ前の形状
例を示す側面図。FIG. 2 is a side view showing an example of the shape of the tip of the titanium alloy valve before being fitted.
【図３】鋼製チップのはめこみ前の形状例を示す側面
図。FIG. 3 is a side view showing an example of the shape of a steel chip before being fitted.
ａ 先端部 ｂ 軸部 ｃ 首部 ｄ 傘部 ｅ 軸端部 ｆ フェース ｇ 溝部 １ バルブ（本体） ２ 雌形 ３ 雄形 ４ 鋼製チップ ５ 突起 ６，７ 角部 a tip part b shaft part c neck part d umbrella part e shaft end part f face g groove part 1 valve (main body) 2 female type 3 male type 4 steel tip 5 protrusions 6, 7 corners
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成４年４月２日[Submission date] April 2, 1992
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００２[Name of item to be corrected] 0002
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００２】[0002]
【従来の技術】これまでに、チタン合金バルブは、競争
用自動車エンジンに適用されている。バルブの外観は図
１に示すような外観形状を有しているが、その先端部ｅ
は、神戸製鋼技報ｖｏｌ．１８，No．４，３６頁に開示
されているように、チタン合金側をＮｉメッキしてから
Ｃｏ−Ｃｒ−Ｗ系合金（ステライト＃１）のチップをろ
う付けして構成されている。2. Description of the Prior Art Titanium alloy valves have hitherto been applied to competitive automobile engines. The external appearance of the valve has the external shape shown in FIG.
Is Kobe Steel Technical Report vol. 18, No. As disclosed on pages 4 and 36, the titanium alloy side is plated with Ni, and then Co-Cr-W alloy (Stellite # 1) chips are brazed.
【手続補正２】[Procedure Amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００３[Name of item to be corrected] 0003
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００３】[0003]
【発明が解決しようとする課題】Ｃｏ−Ｃｒ−Ｗ系合金
棒（ステライト＃１）は、そもそも肉盛り用の材料であ
って、そのまま使用すると、凝固による内部欠陥が多
い。従って、歩留が低い。また、７００Hvと硬度が高い
ため、加工が難しい。ろう付けするためには、チタン合
金側にＮｉめっきすることが不可欠であるが、Ｎｉめっ
き前に弗酸による酸洗などの前処理を施す等多くの工程
が必要となる。The Co--Cr--W alloy rod (Stellite # 1) is a material for overlaying in the first place, and if used as it is, there are many internal defects due to solidification. Therefore, the yield is low. In addition, the hardness is high at 700 Hv, making it difficult to process. For brazing, it is indispensable to perform Ni plating on the titanium alloy side, but many steps such as pretreatment such as pickling with hydrofluoric acid are required before Ni plating.
【手続補正３】[Procedure 3]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００７[Correction target item name] 0007
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００７】圧入の方法は、例えばチタン合金バルブ１
の先端部ｅを、図２に示すように加工し、凹部雌形２を
形成し、図３に示すような突部雄形３を有する鋼製チッ
プ４を加工成形して、前記雌形２に雄形３を圧入する。
ここでチップの突部雄形３の径をチタン合金バルブ先端
部雌形２の穴径よりも３０μｍ大きくしてある。雌−雄
形径差が５０μｍを超えると圧入が困難となる。また雄
形３の先端に突起５（０．５mm長さ、２．９５０φ）を
設けているが、これは、圧入時にチップ４をチタン合金
バルブの雄形３に垂直に設置することができるようガイ
ドの役を果たし、これによって圧入を容易にしている。
また雌形２の頂部及び雄形３のつけ根の角６，７は、疲
労強度を増すためにＲ１．０mmとしてある。ここで焼き
入れ硬化後、圧入するのは、焼き入れしないものを圧入
すると、雌形２の穴に入る雄形３の突部の表面が雌形穴
側面とすれあい塑性変形し、径が一部太くなり、圧入で
きなくなるためである。The press-fitting method is, for example, a titanium alloy valve 1
2 is processed to form a concave female shape 2 and a steel chip 4 having a protruding male shape 3 as shown in FIG. 3 is processed to form the female shape 2 Press male shape 3 into.
Here, the diameter of the projecting male part 3 of the chip is set to be 30 μm larger than the hole diameter of the female part 2 of the titanium alloy valve tip part. When the female-male diameter difference exceeds 50 μm, press-fitting becomes difficult. Also, a protrusion 5 (0.5 mm length, 2.950φ) is provided at the tip of the male shape 3, so that the tip 4 can be installed vertically to the male shape 3 of the titanium alloy valve at the time of press fitting. It serves as a guide, which facilitates press fitting.
The corners 6 and 7 of the top of the female shape 2 and the root of the male shape 3 are R1.0 mm in order to increase fatigue strength. Here, after quenching and hardening, press-fitting is performed by pressing in a non-quenched material. The surface of the protrusion of the male shape 3 that enters the hole of the female shape 2 is plastically deformed by contact with the side surface of the female hole, resulting in a uniform diameter. This is because the part becomes thicker and press-fitting becomes impossible.
【手続補正４】[Procedure amendment 4]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】符号の説明[Correction target item name] Explanation of code
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【符号の説明】 ａ 先端面 ｂ 軸部 ｃ 首部 ｄ 傘部 ｅ 先端部 ｆ フェース ｇ 溝部 １ バルブ（本体） ２ 雌形 ３ 雄形 ４ 鋼製チップ ５ 突起 ６，７ 角部[Explanation of Codes] a Tip surface b Shaft portion c Neck portion d Umbrella portion e Tip portion f Face g Groove portion 1 Valve (main body) 2 Female 3 Male 4 Steel tip 5 Protrusion 6, 7 Corner
【手続補正５】[Procedure Amendment 5]
【補正対象書類名】図面[Document name to be corrected] Drawing
【補正対象項目名】全図[Correction target item name] All drawings
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図１】 [Figure 1]
【図２】 [Fig. 2]
【図３】 [Figure 3]
Claims (1)
硬化可能な耐摩耗性の優れた鋼製チップ状部材を、あら
かじめ所定の寸法に加工後、焼き入れ硬化した後冷間圧
入することを特徴とするチタン合金バルブの製造方法。1. A steel chip-shaped member, which is quench hardenable and has excellent wear resistance, is preliminarily processed into a predetermined size at the tip of a titanium alloy valve, and then quench-hardened and then cold-pressed. A method for manufacturing a characteristic titanium alloy valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15485091A JPH05146921A (en) | 1991-06-26 | 1991-06-26 | Manufacture of titanium alloy valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15485091A JPH05146921A (en) | 1991-06-26 | 1991-06-26 | Manufacture of titanium alloy valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05146921A true JPH05146921A (en) | 1993-06-15 |
Family
ID=15593271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15485091A Withdrawn JPH05146921A (en) | 1991-06-26 | 1991-06-26 | Manufacture of titanium alloy valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05146921A (en) |
-
1991
- 1991-06-26 JP JP15485091A patent/JPH05146921A/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19980903 |