Method of making an apparatus containing a diaphragm, and...

Details Method of making an apparatus containing a diaphragm, and... Method of making an apparatus containing a diaphragm, and...

B - Operations, Transporting

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B21K 1/20 (2006.01) B23K 1/00 (2006.01) B23K 1/18 (2006.01) B23K 11/30 (2006.01)

Patent

CA 1084247

ABSTRACT OF THE DISCLOSURE The invention relates to a method and apparatus for making a device containing a diaphragm, wherein a thin-walled diaphragm element, particularly a corrugated tube, is connected to a flange-forming ring. According to the method the tube, having an oblique rim, is positioned in the deep central depression of a first electrode; the flange-forming ring is positioned in a shallower annular depression in the first electrode so that its inner circular edge contacts the oblique rim, the ring having been previously provided with a thin surface layer produced by chemical nickel plating; a second electrode having a conical end face is brought into contact with the rim; and a current is passed between the electrodes. In this way the ring is securely affixed to the oblique rim of the diaphragm element, as required.

302018

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