US 2007/0175867 A1 · Method for improving single sided resistance spot welds

Abstract

A method of improving a single-sided resistance spot weld includes forming an adhesive bond between a sheet and a tube to thereby form a two-ply structure by which the sheet metal and the tube wall stiffen each other against bending. The adhesive bond is preferably formed by heat curable adhesive and the adhesive is partially cured by applying the electrode to a spot on the sheet and then conducting current through the electrode to induce electric resistance heating in the sheet and tube to cure the adhesive. After the adhesive bond is formed, the electrode is moved to a new spot on the sheet and then forcibly applied against the stiffened sheet and resistance welding current is applied through the electrode to form a resistance spot weld between the stiffened sheet and the stiffened tube wall.

Claims17

Dependent claims

A method of improving a one-sided resistance spot weld between a metal sheet and a wall of a tube, comprising:

dispensing heat curable adhesive between the abutting surfaces of the tube and the sheet;
applying heat at a first spot on the sheet to at least partially cure the adhesive at that spot to thereby adhesively spot bond the metal sheet to the wall of the tube at the first spot;
and thereafter applying an electrode to the sheet at a second spot spaced from the first spot and conducting weld current through the electrode to form a resistance spot weld at the second spot.

Dependencies are inferred from the claim text.

Method for improving single sided resistance spot welds

Life of this patent

Method for improving single sided resistance spot welds

Life of this patent

Abstract

Claims17