JP2946118B2 - Surface treatment method for wing stable bullets - Google Patents
Surface treatment method for wing stable bulletsInfo
- Publication number
- JP2946118B2 JP2946118B2 JP2325555A JP32555590A JP2946118B2 JP 2946118 B2 JP2946118 B2 JP 2946118B2 JP 2325555 A JP2325555 A JP 2325555A JP 32555590 A JP32555590 A JP 32555590A JP 2946118 B2 JP2946118 B2 JP 2946118B2
- Authority
- JP
- Japan
- Prior art keywords
- obturator
- bullet
- annular groove
- wing
- metal layer
- 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
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B14/00—Projectiles or missiles characterised by arrangements for guiding or sealing them inside barrels, or for lubricating or cleaning barrels
- F42B14/02—Driving bands; Rotating bands
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Coating By Spraying Or Casting (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） この発明は発射時ガス漏れを防止するオブチュレータ
と弾丸との摩擦係数を低減させる翼安定弾の表面処理方
法に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface treatment method for a stable wing bullet that reduces the coefficient of friction between a bullet and an obturator for preventing gas leakage at the time of firing.
（従来の技術） 従来弾丸の後部に翼の設けられた翼安定弾には，砲よ
り発射する際砲の内面に摺接して，発射装薬の燃焼ガス
が漏れるのを防止するオブチュレータが設けられてい
る。(Prior art) Conventionally, a wing stabilizer provided with a wing at the rear of the bullet is provided with an obturator that slides against the inner surface of the gun when firing from the gun and prevents the combustion gas of the propellant from leaking. ing.
上記オブチュレータは銅などの金属や，ナイロンなど
の合成樹脂によりリング状に形成されていて，弾丸ａの
外周面に形成された環状溝ｂ内に第５図に示すように嵌
着されており，オブチュレータｃの内周面は環状溝ｂの
内底面に圧接された際高いシール効果が得られるように
平坦面に形成されている。The obturator is formed in a ring shape from a metal such as copper or a synthetic resin such as nylon, and is fitted in an annular groove b formed on an outer peripheral surface of a bullet a as shown in FIG. The inner peripheral surface of the obturator c is formed as a flat surface so as to obtain a high sealing effect when pressed against the inner bottom surface of the annular groove b.
また弾丸ａの環状溝ｂ内は従来ではボンデライド処理
を施して表面にリン酸塩による化成被膜を形成したり，
メッキを施している。Conventionally, the inside of the annular groove b of the bullet a is subjected to a bondelidation treatment to form a chemical conversion film of phosphate on the surface,
Plated.
（発明が解決しようとする課題） しかしボンデライト処理を施された環状溝ｂ内の表面
は，第６図に示すように表面性状が粗いため，オブチュ
レータｃとの摩擦係数が大きく，またメッキの施された
環状溝ｂの表面は第７図に示すように表面性状は平滑で
あるが，オブチュレータｃとの密着性がよいため摩擦係
数が大きい。(Problems to be Solved by the Invention) However, since the surface inside the annular groove b subjected to the bonderite treatment is rough as shown in FIG. 6, the coefficient of friction with the obturator c is large, and the surface is not plated. The surface of the formed annular groove b has a smooth surface as shown in FIG. 7, but has a high coefficient of friction because of good adhesion to the obturator c.
このため翼安定弾を砲より発射する際，オブチュレー
タが砲内面のライフルにより回転されると，この回転が
摩擦係数の大きい接触面（第５図斜線部分）を介して翼
安定弾へ伝達される。Therefore, when the wing stabilizing bullet is fired from the gun, if the obturator is rotated by the rifle on the inner surface of the gun, this rotation is transmitted to the wing stabilizing bullet via the contact surface having a large friction coefficient (the shaded portion in FIG. 5). .
その結果砲より発射された翼安定弾のスピン数が高く
なってモンロー効果が有効に発揮できず，威力が低下す
る不具合があった。As a result, the spin rate of the wing stable bullet fired from the gun becomes high, so that the Monroe effect cannot be effectively exhibited, and there is a problem that the power is reduced.
この発明は上記不具合を改善するためになされたもの
で，オブチュレータと弾丸との摩擦係数を低減する翼安
定弾の表面処理方法を提供することを目的とするもので
ある。SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and has as its object to provide a surface treatment method for a wing stable bullet that reduces the coefficient of friction between an obturator and a bullet.
（課題を解決するための手段及び作用） この発明は上記目的を達成するために発射時ガス漏れ
を防止するオブチュレータを弾丸の外周面に形成した環
状溝内に嵌着した翼安定弾において，上記弾丸の環状溝
の表面に金属を溶射して，オブチュレータとの接触面に
多孔質の溶射金属層を形成するようにしたものである。(Means and Actions for Solving the Problems) In order to achieve the above object, the present invention provides a wing stabilizing bullet in which an obturator for preventing gas leakage at the time of firing is fitted in an annular groove formed on the outer peripheral surface of a bullet. Metal is sprayed on the surface of the annular groove of the bullet to form a porous sprayed metal layer on the contact surface with the obturator.
これによって多孔質溶射金属層によってオブチュレー
タと弾丸との摩擦係数が低減できるため，翼安定弾のス
ピン数を少なくすることができる。As a result, the coefficient of friction between the obturator and the bullet can be reduced by the porous sprayed metal layer, so that the spin rate of the blade stable bullet can be reduced.
また上記方法により形成された溶射金属層の表面に，
オブチュレータと同材質の材料をこすりつけて仕上げ処
理を行うことにより，オブチュレータと弾丸の初期なじ
みがよくなるため，摩擦係数はさらに減少する。Also, on the surface of the sprayed metal layer formed by the above method,
By rubbing and finishing the same material as the obturator, the initial adaptation between the obturator and the bullet is improved, and the friction coefficient is further reduced.
（実施例） この発明の一実施例を第１図ないし第４図に示す図面
を参照して詳述する。(Embodiment) An embodiment of the present invention will be described in detail with reference to the drawings shown in FIGS.
第１図は薬きょうに装着された状態の翼安定弾の断面
図を示すもので，この図において１は翼安定弾,2は薬き
ょう,3はオブチュレータを示す。FIG. 1 is a cross-sectional view of a wing stabilizing bullet mounted on a medicine case. In this figure, 1 denotes a wing stabilizing bullet, 2 denotes a medicine stowage, and 3 denotes an obturator.
上記翼安定弾１は内部に成形炸薬４を収容しており，
薬きょう２の先端側開口より薬きょう２内に挿入されて
いる。The above-mentioned wing stabilizer 1 contains a molded explosive 4 inside,
The medicine case 2 is inserted into the medicine case 2 through the opening on the distal end side.
また薬きょう２内には発射装薬７がほぼ一杯に充填さ
れていると共に，薬きょう２の後端部には，上記発射装
薬７に着火する火管８が取付けられている。The firing shell 2 is almost completely filled with the propellant charge 7, and a fire tube 8 for igniting the firing charge 7 is attached to the rear end of the firing shell 2.
一方薬きょう２の先端より突出した翼安定弾１の外周
面には，環状溝5aが形成されていて，この環状溝5aにオ
ブチュレータ３が嵌着されている。On the other hand, an annular groove 5a is formed on the outer peripheral surface of the wing stabilizer 1 protruding from the tip of the medicine case 2, and the obturator 3 is fitted into the annular groove 5a.
上記オブチュレータ３はナイロンなどの合成樹脂によ
りリング状に形成されていて，外周面は前端側が小径と
なるテーパ状に，そして内周面は環状溝5aの内底面の前
端部および後端部において密着するように平坦面に形成
されている。The obturator 3 is formed in a ring shape from a synthetic resin such as nylon, the outer peripheral surface is tapered so that the front end side has a small diameter, and the inner peripheral surface is in close contact with the front and rear ends of the inner bottom surface of the annular groove 5a. It is formed on a flat surface.
また環状溝5aの内面には，オブチュレータ３との摩擦
係数を低減するため，表面処理が施されている。The inner surface of the annular groove 5a is subjected to a surface treatment to reduce the coefficient of friction with the obturator 3.
表面処理の方法としては,Ni80％,Cr20％よりなる金属
を溶融して環状溝5aの表面に均一な厚さで溶射すること
により，オブチュレータ３との接触面（第２図斜線部
分）に溶射金属層5bを形成したもので，溶射金属層5bは
第３図に示すように多孔質（ポーラス）となるため，オ
ブチュレータ３との摩擦係数を低減することができる。As a method of surface treatment, a metal consisting of 80% of Ni and 20% of Cr is melted and sprayed to a uniform thickness on the surface of the annular groove 5a, so that the surface in contact with the obturator 3 (shaded portion in FIG. 2) is sprayed. Since the metal layer 5b is formed, the thermal sprayed metal layer 5b becomes porous as shown in FIG. 3, so that the coefficient of friction with the obturator 3 can be reduced.
また別の方法としては上記のようにして環状溝5aの表
面に溶射金属層5bを形成したら，さらにその表面にオブ
チュレータ３と同材質のナイロンをこすりつけて，溶射
金属層5bの表面を仕上げ処理するようにしたものであ
る。As another method, after the sprayed metal layer 5b is formed on the surface of the annular groove 5a as described above, the surface of the sprayed metal layer 5b is finished by further rubbing the surface with nylon of the same material as the obturator 3. It is like that.
これはナイロンよりなるオブチュレータ３は，第４図
に示すように接触時間の経過とともに摩擦係数が低下す
ることから，予め溶射金属層5bの表面にナイロンををこ
すりつけて溶射金属とナイロンをなじませることによ
り，初期より低い摩擦係数が得られるようにしたもの
で，この方法は翼安定弾１のように，オブチュレータ３
と弾丸５が接触している時間がごく短いものに特に有効
である。Since the friction coefficient of the obturator 3 made of nylon decreases with the elapse of contact time as shown in FIG. 4, the surface of the sprayed metal layer 5b must be rubbed with nylon in advance to blend the sprayed metal and nylon. In this method, a friction coefficient lower than the initial one can be obtained.
This is particularly effective for the case where the time when the bullet 5 is in contact with the bullet 5 is very short.
（発明の効果） この発明は以上詳述したように，オブチュレータを嵌
着する弾丸の環状溝の内面に金属を溶射することによ
り，表面処理を施したことから，溶射金属層の多孔質表
面によりオブチュレータとの摩擦係数が大幅に低減す
る。(Effects of the Invention) As described in detail above, the present invention provides a surface treatment by spraying metal onto the inner surface of the annular groove of the bullet in which the obturator is fitted. The coefficient of friction with the obturator is greatly reduced.
これによって翼安定弾を砲より発射する際砲内面のラ
イフルによりオブチュレータが回転されても，オブチュ
レータと弾丸の接触面に相対滑りが生じて弾丸が回転さ
れることが少なくなるため，翼安定弾のスピン数を低減
することができるようになる。As a result, even when the obturator is rotated by the rifle on the inner surface of the gun when the wing stabilizing bullet is fired from the gun, relative slippage occurs at the contact surface between the obturator and the bullet and the bullet is less rotated, so that the wing stabilizing bullet is The number of spins can be reduced.
また金属溶射後溶射金属層の表面にオブチュレータと
同材質の材料をこすりつけて予めなじませておくことに
より，さらにオブチュレータと弾丸間の摩擦係数を低減
することができる。In addition, the friction coefficient between the obturator and the bullet can be further reduced by rubbing the surface of the sprayed metal layer after the metal spraying with a material of the same material as that of the obturator in advance and rubbing it.
第１図はこの発明方法を実施した翼安定弾及び薬きょう
の断面図，第２図はオブチュレータの拡大図，第３図は
溶射金属の表面性状を示す説明図，第４図は初期なじみ
と摩擦係数の関係を示す線図，第５図ないし第７図は従
来の説明図である。 ３……オブチュレータ,5……弾丸， 5a……環状溝,5b……溶射金属層。FIG. 1 is a cross-sectional view of a wing stabilizing bullet and a chemical rifle carrying out the method of the present invention, FIG. 2 is an enlarged view of an obturator, FIG. 3 is an explanatory view showing the surface properties of a sprayed metal, and FIG. Diagrams showing the relationship between the coefficients, and FIGS. 5 to 7 are explanatory diagrams of the prior art. 3. Obturator, 5 bullet, 5a annular groove, 5b sprayed metal layer.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 大山 寛 大阪府枚方市上野３―１―１ 株式会社 小松製作所大阪工場内 (56)参考文献 特開 平４−198699（ＪＰ，Ａ) 特開 平４−198697（ＪＰ，Ａ) 特公 昭49−41000（ＪＰ，Ｂ１) 米国特許4177733（ＵＳ，Ａ) 米国特許4413567（ＵＳ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) F42B 14/02 F42B 10/06 F42B 12/10 ──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Hiroshi Oyama 3-1-1 Ueno, Hirakata-shi, Osaka Inside the Osaka Plant of Komatsu Ltd. (56) References JP-A-4-198699 (JP, A) JP-A-Heisei 4-198697 (JP, A) JP 49-41000 (JP, B1) US Patent 4,177,733 (US, A) US Patent 4,413,567 (US, A) (58) Fields investigated (Int. Cl. 6 , DB name) ) F42B 14/02 F42B 10/06 F42B 12/10
Claims (2)
３を弾丸５の外周面に形成した環状溝5a内に嵌着した翼
安定弾において，上記弾丸５の環状溝5aの表面に金属を
溶射して，オブチュレータ３との接触面に多孔質の溶射
金属層5bを形成することを特徴とする翼安定弾の表面処
理方法。1. A wing stabilizing bullet in which an obturator 3 for preventing gas leakage at the time of firing is fitted in an annular groove 5a formed on an outer peripheral surface of a bullet 5, metal is sprayed on the surface of the annular groove 5a of the bullet 5. And forming a porous sprayed metal layer (5b) on the contact surface with the obturator (3).
オブチュレータ３との接触面に多孔質溶射金属層5bを形
成した後，この溶射金属層5bにオブチュレータ３と同材
質の材料をこすりつけて仕上げ処理を行うことを特徴と
する翼安定弾の表面処理方法。2. After spraying a metal on the surface of the annular groove 5a of the bullet 5 to form a porous sprayed metal layer 5b on the contact surface with the obturator 3, a material of the same material as the obturator 3 is formed on the sprayed metal layer 5b. A surface treatment method for wing stable bullets, wherein the surface treatment is performed by rubbing the surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2325555A JP2946118B2 (en) | 1990-11-29 | 1990-11-29 | Surface treatment method for wing stable bullets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2325555A JP2946118B2 (en) | 1990-11-29 | 1990-11-29 | Surface treatment method for wing stable bullets |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04198698A JPH04198698A (en) | 1992-07-20 |
| JP2946118B2 true JP2946118B2 (en) | 1999-09-06 |
Family
ID=18178204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2325555A Expired - Lifetime JP2946118B2 (en) | 1990-11-29 | 1990-11-29 | Surface treatment method for wing stable bullets |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2946118B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005095884A1 (en) * | 2004-04-02 | 2005-10-13 | Techventure Investments Pty Ltd | A projectile |
-
1990
- 1990-11-29 JP JP2325555A patent/JP2946118B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04198698A (en) | 1992-07-20 |
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