Penetration feature in an aluminum alloy - workpiece in order to improve the al - steel - point welding,

摘要

A method for spot welding of a workpiece stack (10), which a workpiece (12) and an adjacent aluminum alloy - workpiece (14, 102), said method comprises that:a stack (10) is provided, which a first side (30) and an opposite second side (32), wherein the stack (10) an aluminium alloy - workpiece (14) having an outer surface (26), which the second side (32) of the workpiece stack (10), and includes, and further comprising a workpiece (12), which comprises either a contact surface (24) of the aluminum alloy - workpiece (14), which the second side (32) of the workpiece stack (10), and, or an abutment surface (106) of a second aluminum alloy - workpiece (102) within the workpiece overlaps stack (10), so that is in contact and a shock boundary surface (28), and wherein the aluminum alloy - workpiece (14), which the second side (32) of the workpiece stack (10), and, a penetration feature (50) comprises;a first welding surface (46) of a first welding electrode (40) against the first side (30) of the workpiece is pressed stack (10) and a second welding surface (48) a second welding electrode (44) against the outer surface (26) of the aluminum alloy - workpiece (14) is pressed, which the second side (32) of the workpiece stack (10), and wherein said first (46) and the second (48) welding surface of the first (40) and the second (44) welding electrode at a weld (16) are aligned in a planar manner, and the second welding surface (48) of the second welding electrode (44) by means of the penetration depth feature (50) against the outer surface (26) of the aluminum alloy - workpiece (14) is pressed, which the second side (32) of the workpiece stack (10), and; andan electrical current between the first (40) and the second (44) welding electrode and by means of the stack (10) at the location of the weld (16) passed through ..