Bending Angle Prediction Model Based on BPNN-Spline in Air Bending Springback Process

Table 3

Experimental sample sets.

Number	t (mm)	R (mm)	r (mm)	M
					(°)	(°)	(°)	(°)	(°)
1	1	0.2	0.2	0.61	88.11	96.72	101.39	118.34	125.54
2	1	0.6	0.6	1.15	83.47	92.97	99.77	118.44	126.47
3	1	0.6	0.6	1.85	90.73	99.77	106.07	122.52	129.9
4	1	1	1	1.93	93.67	101.96	107.87	124.54	131.66
5	1	1	1	2.07	88.77	99.68	105.74	122.74	130.19
6	1.4	0.2	0.6	1.85	86.81	97.11	102.98	120.13	127.86
7	1.4	0.6	0.6	1.93	91.68	99.86	105.84	122.73	130.14
8	1.4	0.6	1	2.07	84.92	96.65	102.9	120.46	127.96
9	1.4	1	1	0.61	85.93	95.04	101.35	118.91	126.5
10	1.4	1	0.2	1.15	79.22	90.8	97.89	116.89	125.43
11	1.4	0.2	0.6	2.07	84.79	96.41	102.02	119.42	127.2
12	1.4	0.6	1	0.61	86.03	94.57	100.69	118.1	125.52
13	1.4	0.6	1	1.15	78.1	89.59	96.67	115.74	124.02
14	1.4	1	0.2	1.85	91.04	99.4	105.52	122.62	129.96
15	1.4	1	0.6	1.93	92.05	100.31	106.35	123.4	130.73
16	2	0.2	1	1.15	73.48	85.85	92.78	113.22	121.76
17	2	0.6	1	1.85	83.6	94.41	101.03	119.38	127.46
18	2	0.6	0.2	1.93	90.36	98.98	105.25	122.8	130.36
19	2	1	0.6	2.07	84.13	95.18	101.94	120.19	128.12
20	2	1	0.6	0.61	83.8	93.02	99.68	118.07	126.2
21	2	0.2	1	1.93	84.79	95.21	101.68	119.98	127.83
22	2	0.6	0.2	2.07	85.72	96.08	102.54	120.54	128.27
23	2	0.6	0.6	0.61	83.5	92.63	99.17	117.55	125.35
24	2	1	0.6	1.15	77.06	88.29	95.12	115.18	124.03
25	2	1	1	1.85	83.76	94.66	101.62	120.16	128.11
T1	1.4	0.6	0.6	1.85	89.32	98.29	104.36	121.42	128.77
T2	2	0.2	0.2	1.93	90.11	98.68	104.89	122.32	129.77
T3	1.4	1	1	1.85	88.13	98.09	104.42	121.81	129.25
T4	1.4	1	0.6	2.07	86.4	97.6	103.87	121.41	128.9
T5	1	0.6	1	0.61	87.07	96.56	102.61	119.55	127.08