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    Stress relieved welds in positive expulsion fuel tanks with elastomeric diaphragm
    12.
    发明授权
    Stress relieved welds in positive expulsion fuel tanks with elastomeric diaphragm 有权

    公开(公告)号：US10139047B2

    公开(公告)日：2018-11-27

    申请号：US14797352

    申请日：2015-07-13

    Applicant: Keystone Engineering Company

    Inventor： Wayne H. Tuttle ,  Ian Ballinger

    IPC: B23K26/00 ,  F17C1/02 ,  F17C13/00 ,  C22C14/00 ,  C22F1/18 ,  C21D1/30 ,  C21D1/42 ,  C21D1/74 ,  B64G1/40

    Abstract: A metallic positive expulsion fuel tank with stress free weld seams may include a first hemispherical shell with a first edge; a pressurized gas inlet attached to the first hemispherical shell; and a metallic cylinder with first and second edges attached to the first hemispherical shell along matching first edges by a first weld seam. The tank may also include a second hemispherical shell with a first edge attached to a fuel outlet fixture. An elastomeric diaphragm may be attached to the fuel outlet fixture on the second hemispherical shell. The second hemispherical shell may be attached to the second edge of the metallic cylinder along matching edges by a second weld seam thereby forming a positive expulsion fuel tank with two interior chambers separated by the elastomeric diaphragm. The first and second weld seams may be subjected to a localized post-weld stress relief heat treatment in which heating of the tank is confined to a distance of 2 inches (5.08 cm) of the first weld seam and a distance of 2 inches (5.08 cm) of the second weld seam such that the stresses in the first and second weld seams are relieved and the elastomeric diaphragm is unaffected by the heat treatment.

    METHOD AND APPARATUS FOR PERFORMING A LOCALIZED POST-WELD HEAT TREATMENT ON A THIN WALL METALLIC CYLINDER
    16.
    发明申请
    METHOD AND APPARATUS FOR PERFORMING A LOCALIZED POST-WELD HEAT TREATMENT ON A THIN WALL METALLIC CYLINDER 有权
    在薄壁金属圆筒上执行局部焊后热处理的方法和装置

    公开(公告)号：US20150344987A1

    公开(公告)日：2015-12-03

    申请号：US14287975

    申请日：2014-05-27

    Applicant: Keystone Engineering Company

    Inventor： Wayne H. Tuttle

    IPC: C21D9/50 ,  H05B6/10 ,  C22C19/05 ,  C22F1/10 ,  C22F1/18 ,  H05B6/06 ,  C21D1/42

    CPC classification number: C21D9/50 ,  C21D1/42 ,  C21D11/00 ,  C21D2221/00 ,  C22C19/00 ,  C22C19/051 ,  C22C19/055 ,  C22C19/056 ,  C22F1/10 ,  C22F1/183 ,  H05B6/06 ,  H05B6/101 ,  Y02P10/253

    Abstract: A method of performing a localized post weld heat treatment on a weld seam in a thin wall metallic body may include attaching thermocouples to the outside surface of the weld seam and covering the weld seam with a thermal insulating blanket. Cooling bands are attached to the outside of the body on both sides of the weld seam. An inert atmosphere enclosure with inlet and exhaust ports is fitted over the weld seam, thermal insulating blanket, and cooling bands. A power supply and control system for an induction coil or coils situated in close proximity to the weld seam are actuated and the weld seam is subjected to a heat treatment without thermally affecting regions of the metallic body adjacent to the weld seam and external to the cooling bands.

    Abstract translation: 在薄壁金属体中的焊缝上执行局部焊后热处理的方法可以包括将热电偶附接到焊缝的外表面并用绝热毯覆盖焊缝。 冷却带附着在焊缝两侧的主体外侧。 带有入口和排气口的惰性气氛外壳安装在焊缝，隔热毯和冷却带上。 驱动位于紧邻焊缝的感应线圈或线圈的电源和控制系统，并且对焊缝进行热处理，而不会对金属体的与焊缝相邻的区域进行热处理，而在冷却之外 乐队。

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