JP4408393B2 - Method for forming composite joint for tank - Google Patents

Method for forming composite joint for tank Download PDF

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JP4408393B2
JP4408393B2 JP2004190671A JP2004190671A JP4408393B2 JP 4408393 B2 JP4408393 B2 JP 4408393B2 JP 2004190671 A JP2004190671 A JP 2004190671A JP 2004190671 A JP2004190671 A JP 2004190671A JP 4408393 B2 JP4408393 B2 JP 4408393B2
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tank
outer peripheral
peripheral surface
composite
cylindrical mandrel
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JP2006007683A (en
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晶夫 森川
雅頼 宮下
武 高橋
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IHI Aerospace Co Ltd
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  • Moulds For Moulding Plastics Or The Like (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Moulding By Coating Moulds (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Description

本発明は、略半球状を成す端部を有するＦＲＰなどの複合材からなるタンクに、上記略半球状端部を取り囲むスカート状を成すＦＲＰなどの複合材からなる継手部を成形するのに用いられるタンクの複合材継手の成形方法に関するものである。   The present invention is used to form a joint portion made of a composite material such as FRP having a skirt shape surrounding the substantially hemispherical end portion in a tank made of a composite material such as FRP having an end portion having a substantially hemispherical shape. The present invention relates to a method for forming a composite joint of a tank.

従来において、上記したような略半球状を成す端部を有するＦＲＰなどの複合材からなるタンクに複合材継手を成形する場合には、例えば、タンクと同じ径の円筒状マンドレルをタンクの略半球状端部の中心に位置する孔部に同軸に取り付けた後、円筒状マンドレルの外周面とタンクの外周面とに跨って複合材を複数層積層して加熱硬化させることにより、複合材継手部を成形するようにしていた。
平成４年９月３０日 丸善株式会社発行 第２版 航空宇宙工学便覧第２４６頁〜第２４８頁。 Conventionally, when a composite joint is formed on a tank made of a composite material such as FRP having an end portion that has a substantially hemispherical shape as described above, for example, a cylindrical mandrel having the same diameter as the tank is formed into a substantially hemispherical shape of the tank. After jointly mounting in the hole located at the center of the cylindrical end, a composite material joint is formed by laminating multiple layers of composite material across the outer peripheral surface of the cylindrical mandrel and the outer peripheral surface of the tank and heat curing. Was to be molded.
September 30, 1992 Issued by Maruzen Co., Ltd. Second edition Aerospace Engineering Handbook, pages 246-248.

ところが、上記した従来の成形方法では、タンクが大型のものである場合において、円筒状マンドレルの外周面とタンクの外周面とに跨って複数層積層した複合材を加熱硬化させる際には、タンクの外周面と略半球状端部の孔部との間に生じる熱膨張による機軸方向の変位差が数ｍｍレベルになり、この数ｍｍレベルの変位差が発生するのに伴って、略半球状端部の孔部に取り付けた円筒状マンドレルの外周面上に位置する複合材の積層部分が円筒状マンドレルとともに移動してしまうことから、複合材の積層部分に歪などの変形が生じてしまうという問題を有しており、この問題を解決することが従来の課題となっていた。   However, in the conventional molding method described above, when the tank is large, when the composite material laminated in a plurality of layers straddling the outer peripheral surface of the cylindrical mandrel and the outer peripheral surface of the tank is heated and cured, The displacement difference in the axial direction due to thermal expansion generated between the outer peripheral surface of the lens and the hole at the substantially hemispherical end becomes several millimeters, and as the displacement difference of several millimeters occurs, the substantially hemispherical Since the laminated portion of the composite material located on the outer peripheral surface of the cylindrical mandrel attached to the hole at the end portion moves together with the cylindrical mandrel, deformation such as distortion occurs in the laminated portion of the composite material. There is a problem, and it has been a conventional problem to solve this problem.

本発明は、上述した従来の課題に着目してなされたものであって、タンクが大型のものであったとしても、歪みなどの変形を伴うことなく複合材継手を成形することが可能であるタンクの複合材継手の成形方法を提供することを目的としている。   The present invention has been made paying attention to the above-described conventional problems, and even when the tank is large, it is possible to form a composite joint without accompanying deformation such as distortion. An object is to provide a method for forming a composite joint for a tank.

本発明は、略半球状を成す端部を有するＦＲＰなどの複合材からなるタンクに同じくＦＲＰなどの複合材を複数層積層して、このタンクの外周面と略面一を成して上記略半球状端部を取り囲む継手部を成形するに際して、上記タンクと同じ径の円筒状マンドレルをタンクの略半球状端部に同軸に取り付け、低摩擦素材から成るシートを上記円筒状マンドレルの外周面に少なくとも２枚積層した後、この低摩擦素材シートで覆われた円筒状マンドレルの外周面と上記タンクの外周面とに跨って複合材を複数層積層して加熱硬化させることにより、複合材継手部を成形する構成としたことを特徴としており、このようなタンクの複合材継手の成形方法の構成を前述した従来の課題を解決するための手段としている。   In the present invention, a plurality of composite materials such as FRP are laminated on a tank made of a composite material such as FRP having a substantially hemispherical end, and substantially the same as the outer peripheral surface of the tank. When forming the joint portion surrounding the hemispherical end, a cylindrical mandrel having the same diameter as the tank is coaxially attached to the substantially hemispherical end of the tank, and a sheet made of a low friction material is attached to the outer peripheral surface of the cylindrical mandrel. After laminating at least two sheets, a composite material joint portion is formed by laminating a plurality of layers of composite material across the outer peripheral surface of the cylindrical mandrel covered with the low friction material sheet and the outer peripheral surface of the tank and heat-curing the composite material. The structure of the method for forming the composite joint of the tank is used as a means for solving the above-described conventional problems.

また、本発明は、略半球状を成す端部を有する複合材からなるタンクに複合材を複数層積層して、このタンクの外周面と略面一を成して上記略半球状端部を取り囲む継手部を成形するに際して、上記タンクと同じ径の円筒状マンドレルをタンクの略半球状端部に同軸に取り付け、低摩擦素材で上記円筒状マンドレルの外周面をコーティングするのに続いてこの低摩擦素材コーティング面上に低摩擦素材から成るシートを積層した後、この低摩擦素材シートで覆われた円筒状マンドレルの外周面と上記タンクの外周面とに跨って複合材を複数層積層して加熱硬化させることにより、複合材継手部を成形する構成としたことを特徴としており、このようなタンクの複合材継手の成形方法の構成を前述した従来の課題を解決するための手段としている。   In the present invention, a plurality of layers of composite materials are laminated on a tank made of a composite material having a substantially hemispherical end, and the substantially hemispherical end is formed so as to be substantially flush with the outer peripheral surface of the tank. When molding the surrounding joint, a cylindrical mandrel of the same diameter as the tank is coaxially attached to the substantially hemispherical end of the tank, and this low-friction material is coated on the outer peripheral surface of the cylindrical mandrel. After laminating a sheet made of a low friction material on the friction material coating surface, a plurality of composite materials are laminated across the outer peripheral surface of the cylindrical mandrel covered with the low friction material sheet and the outer peripheral surface of the tank. It is characterized in that the composite joint part is formed by heat curing, and the composition of the composite joint forming method for such a tank is a means for solving the above-mentioned conventional problems. .

本発明のタンクの複合材継手の成形方法では、上記した構成としているので、タンクが大型のものであったとしても、歪みなどの変形のない複合材継手を成形することが可能であるという非常に優れた効果がもたらされる。   In the method for forming a composite joint for a tank according to the present invention, since it has the above-described configuration, it is possible to form a composite joint without deformation such as distortion even if the tank is large. Has an excellent effect.

本発明のタンクの複合材継手の成形方法において、低摩擦素材には、耐熱温度が２００℃以上のフッ素系樹脂を用いることが望ましく、例えば、ポリテトラフルオロエチレンを用いることができる。   In the method for forming a composite joint of a tank according to the present invention, it is desirable to use a fluorine-based resin having a heat resistant temperature of 200 ° C. or higher as the low friction material, and for example, polytetrafluoroethylene can be used.

また、本発明のタンクの複合材継手の成形方法において、円筒状マンドレルの外周面上に積層する少なくとも２枚のシートは、いずれも同じ種類の低摩擦素材から成るものとすることが望ましいが、互いに異なる種類の低摩擦素材から成るものとしてもよい。   In the method for forming a composite joint for a tank of the present invention, it is desirable that at least two sheets laminated on the outer peripheral surface of the cylindrical mandrel are both made of the same type of low friction material, It may be made of different types of low friction materials.

さらに、本発明のタンクの複合材継手の成形方法において、円筒状マンドレルの外周面を覆うコーティング材とこのコーティング材上に積層するシートに関しても、いずれも同じ種類の低摩擦素材を用いることが望ましいが、互いに異なる種類の低摩擦素材を用いてもよい。   Further, in the method for forming a composite joint of a tank according to the present invention, it is desirable to use the same type of low friction material for the coating material covering the outer peripheral surface of the cylindrical mandrel and the sheet laminated on the coating material. However, different types of low friction materials may be used.

以下、本発明を図面に基づいて説明するが、本発明は以下の実施例に限定されるものではない。   Hereinafter, the present invention will be described with reference to the drawings, but the present invention is not limited to the following examples.

図１及び図２は本発明に係わるタンクの複合材継手の成形方法の一実施例を示している。   1 and 2 show an embodiment of a method for forming a composite joint for a tank according to the present invention.

図１に部分的に示すように、このタンク１は略円筒状を成すＦＲＰ（複合材）からなるものであって、略半球状を成す端部２を有しており、この略半球状端部２の中心には孔部３が設けてある。このタンク１には、その外周面４と略面一を成して略半球状端部２を取り囲むスカート状のＦＲＰ（複合材）からなる継手部５が設けられるようになっている。   As shown partially in FIG. 1, the tank 1 is made of FRP (composite material) having a substantially cylindrical shape, and has an end portion 2 having a substantially hemispherical shape. A hole 3 is provided at the center of the portion 2. The tank 1 is provided with a joint portion 5 made of a skirt-like FRP (composite material) that is substantially flush with the outer peripheral surface 4 and surrounds the substantially hemispherical end portion 2.

このタンク１に対して、ＦＲＰのプリプレグを複数層積層して上記継手部５を成形するに際しては、まず、タンク１と同じ径の円筒状マンドレル１０をタンク１の略半球状端部２の中心に位置する孔部３に同軸に取り付ける。   When forming the joint portion 5 by laminating a plurality of FRP prepregs on the tank 1, first, the cylindrical mandrel 10 having the same diameter as the tank 1 is placed at the center of the substantially hemispherical end portion 2 of the tank 1. It attaches coaxially to the hole 3 located in the position.

次いで、図２に示すように、低摩擦素材としてのポリテトラフルオロエチレンから成るシート１２を円筒状マンドレル１０の外周面１１に２枚積層した後、これらのシート１２で覆われた円筒状マンドレル１０の外周面１１とタンク１の外周面４とに跨ってＦＲＰのプリプレグを複数層積層する。   Next, as shown in FIG. 2, two sheets 12 made of polytetrafluoroethylene as a low friction material are laminated on the outer peripheral surface 11 of the cylindrical mandrel 10, and the cylindrical mandrel 10 covered with these sheets 12 is then stacked. A plurality of FRP prepregs are laminated across the outer peripheral surface 11 and the outer peripheral surface 4 of the tank 1.

そして、円筒状マンドレル１０の外周面１１とタンク１の外周面４とに跨って複数層積層したＦＲＰのプリプレグを加熱硬化させて、複合材継手部５を成形する。   And the composite joint part 5 is shape | molded by heat-hardening the FRP prepreg which laminated | stacked two or more layers ranging over the outer peripheral surface 11 of the cylindrical mandrel 10, and the outer peripheral surface 4 of the tank 1. FIG.

上記加熱硬化に際して、タンク１の外周面４と略半球状端部２の孔部３との間には、熱膨張による機軸方向の変位差が数ｍｍレベルで生じるが、円筒状マンドレル１０の外周面１１に積層したポリテトラフルオロエチレンから成る２枚のシート１２間の摩擦係数が低いことから、円筒状マンドレル１０の外周面１１側のシート１２と複合材継手部５側のシート１２とが互いに滑り合うこととなり、したがって、複合材継手部５の円筒状マンドレル１０上に位置する部分は、略半球状端部２の孔部３の変位、すなわち、この孔部３に取り付けた円筒状マンドレル１０の移動に追従することがなく、その結果、歪みなどの変形のない複合材継手５が形成されることとなる。   During the heat curing, a difference in displacement in the axis direction due to thermal expansion occurs between the outer peripheral surface 4 of the tank 1 and the hole 3 of the substantially hemispherical end 2 at a level of several millimeters. Since the friction coefficient between the two sheets 12 made of polytetrafluoroethylene laminated on the surface 11 is low, the sheet 12 on the outer peripheral surface 11 side of the cylindrical mandrel 10 and the sheet 12 on the composite joint part 5 side are mutually Therefore, the portion located on the cylindrical mandrel 10 of the composite joint portion 5 is displaced by the displacement of the hole 3 of the substantially hemispherical end 2, that is, the cylindrical mandrel 10 attached to the hole 3. As a result, the composite joint 5 having no deformation such as distortion is formed.

上記した実施例では、タンク１にＦＲＰのプリプレグを複数層積層して継手部５を成形するに際して、低摩擦素材としてのポリテトラフルオロエチレンから成るシート１２を円筒状マンドレル１０の外周面１１に２枚積層する場合を示したが、これに限定されるものではなく、円筒状マンドレル１０の外周面１１にシート１２を３枚以上積層したり、円筒状マンドレル１０の外周面１１を低摩擦素材としてのポリテトラフルオロエチレンでコーティングするのに続いてこのコーティング面上に低摩擦素材としてのポリテトラフルオロエチレンから成るシート１２を積層したりしてもよい。   In the above-described embodiment, when the joint portion 5 is formed by laminating a plurality of FRP prepregs on the tank 1, the sheet 12 made of polytetrafluoroethylene as a low friction material is placed on the outer peripheral surface 11 of the cylindrical mandrel 10. Although the case where the sheets are laminated is shown, the present invention is not limited to this, and three or more sheets 12 are laminated on the outer peripheral surface 11 of the cylindrical mandrel 10, or the outer peripheral surface 11 of the cylindrical mandrel 10 is used as a low friction material. After coating with polytetrafluoroethylene, a sheet 12 made of polytetrafluoroethylene as a low friction material may be laminated on the coating surface.

また、円筒状マンドレル１０の外周面１１上に積層する少なくとも２枚のシート１２は、互いに異なる種類の低摩擦素材から成るものとしてもよく、さらに、円筒状マンドレル１０の外周面１１を覆うコーティング材とこのコーティング材上に積層するシート１２に関しても、互いに異なる種類の低摩擦素材を用いてもよい。   Further, the at least two sheets 12 laminated on the outer peripheral surface 11 of the cylindrical mandrel 10 may be made of different types of low friction materials, and further, a coating material that covers the outer peripheral surface 11 of the cylindrical mandrel 10. As for the sheet 12 laminated on the coating material, different types of low friction materials may be used.

本発明の一実施例を示すタンクの軸心に沿う方向の部分断面説明図である。（実施例１）It is a fragmentary sectional view of the direction in alignment with the axial center of the tank which shows one Example of this invention. (Example 1) 図１における円内を拡大して示す部分拡大断面説明図である。（実施例１）FIG. 2 is a partially enlarged cross-sectional explanatory view showing the inside of a circle in FIG. 1 in an enlarged manner. (Example 1)

符号の説明Explanation of symbols

１ タンク
２ 略半球状端部
３ 孔部
４ タンクの外周面
５ 複合材継手部
１０ 円筒状マンドレル
１１ 円筒状マンドレルの外周面
１２ 低摩擦素材シート Reference Signs List 1 tank 2 substantially hemispherical end 3 hole 4 outer peripheral surface of tank 5 composite joint portion 10 cylindrical mandrel 11 outer peripheral surface of cylindrical mandrel 12 low friction material sheet

Claims (3)

略半球状を成す端部を有する複合材からなるタンクに複合材を複数層積層して、このタンクの外周面と略面一を成して上記略半球状端部を取り囲む継手部を成形するに際して、上記タンクと同じ径の円筒状マンドレルをタンクの略半球状端部に同軸に取り付け、低摩擦素材から成るシートを上記円筒状マンドレルの外周面に少なくとも２枚積層した後、この低摩擦素材シートで覆われた円筒状マンドレルの外周面と上記タンクの外周面とに跨って複合材を複数層積層して加熱硬化させることにより、複合材継手部を成形することを特徴とするタンクの複合材継手の成形方法。   A plurality of layers of composite materials are laminated on a tank made of a composite material having a substantially hemispherical end, and a joint portion that is substantially flush with the outer peripheral surface of the tank and surrounds the substantially hemispherical end is formed. At this time, a cylindrical mandrel having the same diameter as that of the tank is coaxially attached to the substantially hemispherical end of the tank, and at least two sheets made of a low friction material are laminated on the outer peripheral surface of the cylindrical mandrel, and then the low friction material. A composite of a tank characterized in that a composite joint is formed by laminating a plurality of layers of composite material across the outer peripheral surface of a cylindrical mandrel covered with a sheet and the outer peripheral surface of the tank and then heat-curing the composite material. Forming method of material joint. 略半球状を成す端部を有する複合材からなるタンクに複合材を複数層積層して、このタンクの外周面と略面一を成して上記略半球状端部を取り囲む継手部を成形するに際して、上記タンクと同じ径の円筒状マンドレルをタンクの略半球状端部に同軸に取り付け、低摩擦素材で上記円筒状マンドレルの外周面をコーティングするのに続いてこの低摩擦素材コーティング面上に低摩擦素材から成るシートを積層した後、この低摩擦素材シートで覆われた円筒状マンドレルの外周面と上記タンクの外周面とに跨って複合材を複数層積層して加熱硬化させることにより、複合材継手部を成形することを特徴とするタンクの複合材継手の成形方法。   A plurality of layers of composite materials are laminated on a tank made of a composite material having a substantially hemispherical end, and a joint portion that is substantially flush with the outer peripheral surface of the tank and surrounds the substantially hemispherical end is formed. At this time, a cylindrical mandrel having the same diameter as that of the tank is coaxially attached to the substantially hemispherical end of the tank, and the outer peripheral surface of the cylindrical mandrel is coated with a low friction material. After laminating sheets made of low friction material, by laminating multiple layers of composite material across the outer peripheral surface of the cylindrical mandrel covered with this low friction material sheet and the outer peripheral surface of the tank, and heat curing, A method for forming a composite joint for a tank, comprising forming a composite joint portion. 低摩擦素材をポリテトラフルオロエチレンとした請求項１又は２に記載したタンクの複合材継手の成形方法。   The method for forming a composite joint for a tank according to claim 1 or 2, wherein the low friction material is polytetrafluoroethylene.
JP2004190671A 2004-06-29 2004-06-29 Method for forming composite joint for tank Expired - Lifetime JP4408393B2 (en)

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