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    Induction tube welding apparatus
    151.
    发明授权
    Induction tube welding apparatus 失效
    感应管焊接设备

    公开(公告)号：US3397295A

    公开(公告)日：1968-08-13

    申请号：US42923265

    申请日：1965-02-01

    Applicant: TUBE PROD LTD

    Inventor： JAMES HALE

    IPC: B23K13/02 ,  H05B6/02

    CPC classification number: B23K13/02 ,  B23K2201/06

    Abstract: 1,037,333. Welding by pressure. TUBE PRODUCTS Ltd. Jan. 19, 1965 [Feb. 28, 1964], No. 8540/64. Heading B3R. In a method of manufacturing welded tube by a continuous high-frequency induction process employing an induction coil 12 for heating the strip edges prior to forcing them together by forming rolls, an intensifier is placed over the coil 12 to concentrate the heating effect of the induced current in the edges of the strip. The intensifier comprises a bar 14 of ferrite or other material of high magnetic permeability, preferably located in a housing 16 of insulating material through which water or other coolant 17 is circulated. The bar 14 may be solid or may be hollow and may be of rectangular, circular, or any other convenient cross-section. An impeder 13 made of ferrite or other material of high magnetic permeability may also be used to assist in concentrating the heating effect of the induced current in the edges of the strip.

    Closure means for tubular members
    152.
    发明授权
    Closure means for tubular members 失效
    用于管状构件的闭合装置

    公开(公告)号：US3327892A

    公开(公告)日：1967-06-27

    申请号：US19973162

    申请日：1962-06-04

    Applicant: ATOMIC ENERGY AUTHORITY UK

    Inventor： HENRY LLOYD ,  WILLIAM COBB HAROLD RALPH

    IPC: B23K1/20 ,  G21C3/10

    CPC classification number: G21C3/10 ,  B23K1/20 ,  B23K2201/06 ,  Y02E30/40

    Abstract: 946,344. Brazing; welding by fusion. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. June 1, 1962 [June 13, 1961], No. 21260/61. Heading B3R. [Also in Divisions G1 and G6] A method of brazing an end closure member to a tubular member comprises producing a capillary film of braze metal between the members, the area of the joint being limited in two directions by spacing the members too far apart to allow capillary flow to take place. As seen in Fig. 1, the tube 1, in this case a stainless steel nuclear fuel can, has placed within its end a cup shaped cap 2 also of stainless steel. A ring of brazing material 4 is forced on to a peripheral shoulder 3 of the end cap, and the exterior of the ring 4 is a force fit in the tube 1. Brazing is achieved by placing the assembly in a vacuum chamber and heating to 1080-1100‹ C., when the brazing metal ring 4 melts and flows by capillary action to braze the end cap to the tube between the two annular shoulders 3, 5. The volume of the ring 4 is just sufficient to fill the capillary volume and form a small fillet about the shoulder 3. The brazed assembly is prepared for welding by rolling the cap to close the outermost gap 5 between the cap and tube. The edges are then sealed at 7 in Fig. 2 by a standard argon arc welding process. In a modification an annular hollow 8, Fig. 3, is left beneath the welded edges, and this hollow is filled with a tracer gas for checking the weld for leaks. The reservoir may be filled with tracer gas by incorporating this in the argon gas shield during the welding.

    Method of making coated tubing
    155.
    发明授权
    Method of making coated tubing 失效
    制作涂层管道的方法

    公开(公告)号：US3073019A

    公开(公告)日：1963-01-15

    申请号：US74220158

    申请日：1958-06-16

    Applicant: GEN MOTORS CORP

    Inventor： ISADORE CAPLAN ,  RUFLIN GERARD T ,  ZILE DONALD K VAN

    IPC: B21C37/09 ,  B23K1/008 ,  B23K1/08 ,  C23C2/38 ,  C23C14/04

    CPC classification number: C23C14/046 ,  B21C37/09 ,  B23K1/008 ,  B23K1/08 ,  B23K2201/06 ,  B23K2203/04 ,  C23C2/38 ,  Y10T29/49888 ,  Y10T29/49986

    Abstract: 860,669. Coating with metals. GENERAL MOTORS CORPORATION. May 13, 1959 [June 16, 1958], No. 16416/59. Class 82(2) [Also in Group XXII] In making brazed and coated steel tubing, a steel strip is progressively rolled into tubular form by passing the strip longitudinally through the rolls, a supply of zinc or zinc alloy is continuously fed into the tubing, the tubing is heated to vaporize the zinc or zinc alloy, and the tubing is immersed in a bath of copper or copper alloy so that the metals form an alloy which coats the interior thereof and brazes the seam. A flat steel strip S if fed from a reel 10 to a mill 12 having rollers 14, 22 and a swaging device 24 to form the strip into circular cross-section. A wire 26 of zinc or zinc alloy is fed by rolls 42 from a reel 40 through a tube 44 into the interior of the tubing before it is fully formed. A non-oxidizing gas is fed through a pipe 30 which enters the tubing at the point of supply of the zinc wire and extends within the tubing towards the swaging device. The formed tubing is heated to above 1665‹F. in a furnace 32 supplied with the non-oxidizing gas and the zinc or zinc alloy is vaporized. The tubing while still in the furnace is passed through a bath 34 of molten copper or copper alloy supplied with wire 54 to automatically maintain a constant level. The molten metal migrates through the seam 16 and forms with the vaporized metal an alloy which coats the inner surface of the tubing. The tubing then passes through a cooling chamber 38 supplied with the non-oxidizing gas. The gas may be by volume 10% carbon monoxide, 18% hydrogen, 4¢% carbon dioxide, 1% methane and balance nitrogen or may comprise nitrogen, helium, argon, carbon monoxide &c.

    Brazing process
    159.
    发明授权
    Brazing process 失效
    钎焊工艺

    公开(公告)号：US2550512A

    公开(公告)日：1951-04-24

    申请号：US2629548

    申请日：1948-05-11

    Applicant: GEN ELECTRIC

    Inventor： WOOLRICH JAMES N

    IPC: B23K1/00

    CPC classification number: B23K1/00 ,  B23K2201/06 ,  B23K2201/18 ,  Y10T29/49364

    Abstract: 675,564. Soldering and brazing. BRITISH THOMSON-HOUSTON CO., Ltd. May 9,1949 [May 11, 1948], No. 12330/49. Class 83 (iv). Metal parts are clamped together prior to brazing by clamps made wholly of brazing metal and the assembly is heated to fuse the brazing metal and effect brazing. Clampshaped pieces 3 of brazing material are fixed to the sheet 2 by spot-welding, for example, thus holding the tubing 1 in place. The assembly is heated to fuse the pieces 3 and fillets 7 and 8 thus braze the tubing 1 to the sheet 2. The pieces 3 may be of any length and the brazing operation may be carried out without a flux if a reducing atmosphere is used.

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