矩形截面型材三维多点拉弯成形减薄率

doi:10.13229/j.cnki.jdxbgxb20190968

Abstract

Abstract:

Aiming at the thinning defect which is easy to occur in the processing of aluminum profiles， the thinning rate of multi-point flexible forming parts was studied on the self-developed flexible three-dimensional bending equipment for aluminum profiles. The variations of the thinning rates of the outer web and the inner web along the length of the profile after the three-dimensional multi-point stretch-bending deformation of the rectangular section profile are studied. The results show that the thinning rates of the outer and inner webs of the profile gradually increase from the symmetry center of the profile along the direction of the profile during the forming process， and the thinning rate of the outer web is larger than that of the inner web. The change of die number makes the maximum thinning rate of the outer web up to 1.682% and the minimum is 1.317%. The thinning amplitude is 0.365%. The maximum thinning rate of the inner web is 1.657%， and the minimum is 1.198%. The thinning amplitude is 0.459%， and the number of dies is the main processing parameter that causes the variation of the thinning rate of the parts.

Key words: material synthesis and processing, multi-point forming, three-dimensional stretch-bending, aluminum alloy profiles, thinning rate

CLC Number:

TG356

Ji-cai LIANG,Yan-fei LIAO,Fei TENG,Ce LIANG,Yi LI. Rectangular section profile thinning rate of three-dimensional multi-point stretch bending process[J].Journal of Jilin University(Engineering and Technology Edition), 2021, 51(1): 163-171.

Figures/Tables 12

Fig.1

Fig.2

Fig.3

Fig.4

Table 1

Numerical simulation results of profile reduction rate"

间距值	l/L	$Δ 1$	( $Δ 1$ / $d 0$ )×100%	$Δ 2$	( $Δ 2$ / $d 0$ )×100%
142	0.1	0.0192	0.96	0.01390	0.695
284	0.2	0.0194	0.97	0.01960	0.980
426	0.3	0.025	1.25	0.02300	1.150
568	0.4	0.0264	1.32	0.02440	1.220
710	0.5	0.0268	1.34	0.02377	1.480
852	0.6	0.0282	1.41	0.02960	1.620
994	0.7	0.0336	1.68	0.03240	1.680
1136	0.8	0.0376	1.88	0.03540	1.770
1278	0.9	0.0434	2.17	0.03700	1.850
1420	1.0	0.0470	2.35	0.03640	1.820

Table 1

Fig.5

Fig.6

Fig.7

Fig.8

Fig.9

Fig.10

Table 2

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