GB1032082A - Improvements in or relating to vibratory welding of metals - Google Patents

Abstract

1,032,082. Welding by pressure. ASSOCIATED ELECTRIC INDUSTRIES Ltd. Sept. 11, 1962 [Nov. 8, 1961], No. 40001/61. Heading B3R. In butt welding the edges of two sheet metal parts relative vibratory motion is imparted to at least one of the edges whilst pressing the edges together in abutting relation, the relative motion having substantially no component in the direction of the pressure. One edge P, Fig. 2, is contacted by an axially vibrating member V and the other edge Q is mechanically clamped and welding is effected between the edges pressed together by forces C. The edge P may have a resilient backing or a second vibrator, in phase with the first, is applied to the underside of edge P. Oil or grease may be arranged between the vibrator and the edge P. When the edges of a tube blank are welded a rigid hollow mandrel M, Fig. 3, is placed within the tube, one edge Q being supported between the mandrel and a roller R while the other edge P is vibrated by a vibrator V shaped to conform to the tube surface and backed by an elastic material contained in a step S in the mandrel. An internal mandrel resonating at the applied vibrating frequency may be employed with the roller R clamping the movement of edge Q. When a mandrel is not employed in welding a cable sheath a layer of oil or grease is applied between the vibrator and the edge P and a second vibrator, 180 degrees out of phase with the first, is applied to the other edge Q, oil or grease also being arranged on the latter edge and the sheath is advanced continuously. The thickness of the sheet material to be welded may be 0À015-0À10 inch and the edges are pressed together by squeeze rollers or dies. The Specification refers to vibrating the edges at right angles to the direction B, B<SP>1</SP> in Fig. 2 and in the direction of the seam.