Angular Variation of Vibration Weld Joint Strength: In Horizontal Plane and In Vertical Plane

Joint strength of a vibration welded part is a critical parameter that determines the burst strength of a welded structure, like air intake manifolds. This paper presents experimental values of weld strengths that are slanted with respect to the clamping force direction (Vertical plane). It also presents local weld strengths of an in-plane, circular weld joint, as a function of its angular position relative to the welding head movement direction (Horizontal plane). Finally, the paper shows significant discrepancy between the real part weld strength and typical laboratory strength data, which is normally obtained from a flat bar welded in a butt-joint mode and tested in pure tension mode.