Research on the Cross Section Forming Quality of Three-Dimensional Multipoint Stretch Forming Parts
Table 3
Range table.
Index
A
B
C
D
δh
k1
0.0845
0.0843
0.0962
0.0846
k2
0.0817
0.0875
0.0857
0.0869
k3
0.0904
0.0884
0.0823
0.0835
k4
0.0885
0.0849
0.0810
0.0902
R
0.0087
0.0040
0.0152
0.0067
δv
k1
0.1188
0.1125
0.1357
0.1113
k2
0.1096
0.1152
0.1106
0.1204
k3
0.1204
0.1182
0.1109
0.1080
k4
0.1168
0.1198
0.1084
0.1259
R
0.0108
0.0073
0.0273
0.0179
δp
k1
0.1212
0.1166
0.1392
0.1274
k2
0.1162
0.1224
0.1224
0.1280
k3
0.1293
0.1257
0.1166
0.1117
k4
0.1170
0.1188
0.1054
0.1165
R
0.0131
0.0091
0.0338
0.0163
ηh
k1
0.0177
0.0163
0.0184
0.0185
k2
0.0155
0.0162
0.0171
0.0165
k3
0.0154
0.0163
0.0160
0.0149
k4
0.0166
0.0164
0.0136
0.0151
R
0.0023
0.0002
0.0048
0.0036
ηv
k1
0.0124
0.0127
0.0119
0.0111
k2
0.0120
0.0102
0.0113
0.0112
k3
0.0096
0.0108
0.0120
0.0109
k4
0.0120
0.0124
0.0109
0.0134
R
0.0028
0.0024
0.0011
0.0025
ηp
k1
0.0263
0.0240
0.0236
0.0247
k2
0.0224
0.0219
0.0236
0.0253
k3
0.0221
0.0249
0.0259
0.0219
k4
0.0253
0.0253
0.0230
0.0242
R
0.0041
0.0034
0.0030
0.0033
Note: δh represents the collapse rate in the horizontal stage, δv represents the collapse rate in the vertical stage, δp represents the collapse rate in the poststretching process, ηh represents the bulging rate in the horizontal stage, ηv represents the bulging rate in the vertical stage, and ηp represents the bulging rate in the poststretching process.
