Comparison between ultrasonic and spot resistant welding (table)

1. Difference between ultrasonic
and spot resistant welding
By : Basel Raafat Radwan Saleh Selim
3rd
year
Production and mechanical design department
Supervisor : Dr. Hassan Abdelhafez
2015 -2016

2. Spot resistant weldingUltrasonic
Contacted metal surfaces are
joined by the heat obtained from
resistance to electric current.
Work-pieces are held together
under pressure exerted by
electrodes
ultrasonicfrequency-ighH
are locally appliedvibrations
g heldbeinto work pieces
together under pressure to
weldstate-create a solid
1-Working principle
Due to electrical resistantDue to vibration2-Heat produced
Mostly metalsMostly Plastic or dissimilar
materials
3-Types of materials
E=I.R^2.T
E is related to current , resistance
and thickness
E=(H.T)^1.5
E is related to Rickers
hardness number
E is related to thickness of
the sheer
4-Energy formula
Lower
High
5-Tool wear
Large amount of heatFewer amount of heat6-Heat produced
SolidSolid7-State
HighLow8-Cost
Rarely use filler metalNo filler metal is required9-Filler metal
No fluxNo flux10-Flux