Sheet Metal Forming

part properties, 258
process variations, 249(F)
spinning ratio in single-cycle spinning, 251(F)
stress states, 249–250
tool path planning, 253–254
involute tool path, 254(F)
parametrized tool path, 253(F)
process variables, a round cup, 255(T)
recommended feed rate, 255(T)
recommended spindle speed, 255(T)
spinning cycles, cup geometry, 255(F)
tool paths, composition of, 253(F)
tooling
assisting tool devices, 258(F)
big parts, 257(F)
oval spinning, 256, 257(F)
roller-type tool designs, 257, 258(F)
teach-in, 256–258(F)
tool designs, 258(F)
split rolls, 220
splitting, 42(F)
springback
AHSS (
see
springback in AHSS)
angle, 22–23
backing pads, 34, 35(F)
BEND, 31
bending, 20
bending (angle change), 126
bending angle, 44
blanking, 2
elastic recovery, 127(F)
EMF, 245
high-strength steels, 25(F)
high-velocity forming, 227
hybrid, 126
ISF, 281–282
membrane (wall curl), 126

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360 / Sheet Metal Forming—Processes and Applications
springback (continued)
overview, 126
roll forming, 220
straight flanging, 35–37(F)
tractrix die bending, 31(F)
tube bending, 186
twisting, 126
types, 126
wipe die bending, 22, 35–37(F)
Young’s modulus, 23
springback in AHSS
bottoming, 127–128
compensation for, 127
crash forming, 128
geometry-based compensation, 127
mechanics-based compensation, 127
forming velocity modification, 128
DP 590, 128
dwell time, 129(F)
punch velocity, 129(F)
sheet thickness reduction, 129(F)
overbending/overforming, 127
channel cross-sectional design, 129(F)
overbending, 128(F)
overforming, 128(F)