TH179171A - Method of resistance welding point and weld joint - Google Patents

Abstract

A resistance point welding method that can produce a large (6) nugget while suppressing the occurrence of sparks.This invention's point resistance welding method overlays two or more of these (1) sheets. , 2) where the pressure (F) after the start of the passage of electricity becomes the pressure Fh (1) (1.03 x Fi &lt; _ Fh (1) <_ 1.15 x Fi) relative to the initial pressure ( Fi), during which the time has elapsed 20 ms or more, not more than 80 ms from the start of the current. Pause the passage of electricity 20 milliseconds up to 60 milliseconds, thereafter, when pressing F becomes the pressure Fc (1) (1.01 x Fi &lt; _ Fc (1) &lt; _ 0.99 x Fh ( 1)) will initiate the passage of electricity again.

Claims (1)

1. A point resistance welding method in which two or more sheets of steel are overlaid where the pressure F after the start of the passage of current becomes the pressure Fh (1) as shown in Equation (1) with respect to the force. Press Fi start, during which time has elapsed 20 ms or more, up to 80 ms from Starting through electric current Perform a pause for passing electricity 20 ms up to no more than 60 ms & nbs.