Advances in Solid-State Joining at EWI

Temperature, C
Line Speed (m/min)
Preliminary Assessments of the High-Speed
Manufacturing System for Automotive Panel
Thermal analyses for predicting strip heating and
cooling
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Closed form solutions
Geometric and material property effects
Estimates of heating and cooling dynamics
Temperature-time relationships at each interface
Estimates of processing requirements
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Total thermal cycles on the order of 10s of milliseconds
Speeds in the range of m/min
Influence of panel design
Estimates of currents and voltages
Demonstration trials underway
w
n
4
w
( 1) (2n
1)
exp
2 2
2
n 0 2n
1 4(
1 2) v
Equation Defining Conductive Heating Associated with
the Hot Roll Technology (Courtesy CellTech Metals)
0
(
h
0
)exp
v
2
v
2
Equation Defining Cooling Associated with the Hot Roll
Technology (Courtesy CellTech Metals)
2
K
1
(
1
H
x
2
R)
x
700
12
600
500
400
300
10
8
6
0.5-mm core
1.0-mm core
1.5-mm core
200
4
100
2
0
0 0.01 0.02 0.03 0.04 0.05
Location in X Direction, m
Heating and Cooling Profile for a 1.5-mm
Thick Panel During Resistance Roll
Brazing (Courtesy CellTech Metals)
0
0 0.2 0.4 0.6 0.8 1 1.2
Strip Thickness (mm)
Relationships Between Panel Geometry
Factors and Line Speed for Resistance Roll
Brazing (Courtesy CellTech Metals)