矩形截面型材三维多点拉弯成形减薄率

doi:10.13229/j.cnki.jdxbgxb20190968

吉林大学学报(工学版) ›› 2021, Vol. 51 ›› Issue (1): 163-171.doi: 10.13229/j.cnki.jdxbgxb20190968

• 材料科学与工程 • 上一篇

矩形截面型材三维多点拉弯成形减薄率

梁继才^1,²(),廖雁飞^1,²,滕菲³(),梁策^1,⁴,李义^1,⁴

^1.吉林大学材料科学与工程学院，长春 130022
^2.吉林大学辊锻工艺研究所，长春 130022
^3.长春大学机械与车辆工程学院，长春 130012
^4.吉林大学汽车材料教育部重点实验室，长春 130022

收稿日期:2019-07-24 出版日期:2021-01-01 发布日期:2021-01-20
通讯作者: 滕菲 E-mail:liangjicai@126.com;tengfei325@126.com
作者简介:梁继才（1960-），男，教授，博士. 研究方向：材料加工. E-mail:liangjicai@126.com
基金资助:
国家自然科学基金项目(51675225);吉林省发展和改革委员会项目(2019C046-2);吉林省科技厅自然科学基金项目(20190201110JC);吉林省教育厅基金项目(JJKH20180943KJ);长春大学春蕾基金项目(ZKC201901)

Rectangular section profile thinning rate of three-dimensional multi-point stretch bending process

Ji-cai LIANG^1,²(),Yan-fei LIAO^1,²,Fei TENG³(),Ce LIANG^1,⁴,Yi LI^1,⁴

^1.College of Materials Science and Engineering，Jilin University，Changchun 130022，China
^2.Roll Forging Institute，Jilin University，Changchun 130022，China
^3.School of Mechanical and Vehicle Engineering，Changchun University，Changchun 130012，China
^4.Key Laboratory of Automobile Materials，Ministry of Education，Jilin University，Changchun 130022，China

Received:2019-07-24 Online:2021-01-01 Published:2021-01-20
Contact: Fei TENG E-mail:liangjicai@126.com;tengfei325@126.com

摘要/Abstract

摘要：

针对铝型材在加工过程中易出现的减薄缺陷，在自主研制的铝型材柔性三维拉弯装置上，进行多点柔性成形制件的减薄率研究。矩形截面型材三维多点拉弯变形后，外腹板与内腹板沿着型材长度方向减薄率的变化结果表明：成形过程中型材的外腹板与内腹板减薄率会从型材的对称中心沿着型材方向逐渐变大，外腹板的减薄率比内腹板的减薄率大；模具头体个数的变化使得外腹板的减薄率最大为1.682%，最小为1.317%，减薄率变化幅度为0.365%；内腹板减薄率最大为1.657%，最小为1.198%，变化幅度为0.459%，单元体个数是引起制件减薄率变化的主要加工参数。

关键词: 材料成形与加工, 多点成形, 三维拉弯, 铝合金型材, 减薄率

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

中图分类号:

TG356

梁继才,廖雁飞,滕菲,梁策,李义. 矩形截面型材三维多点拉弯成形减薄率[J]. 吉林大学学报(工学版), 2021, 51(1): 163-171.

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.

图/表 12

图1

图2

图3

图4

表1

型材减薄率数值模拟结果"

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

表1

图5

图6

图7

图8

图9

表2

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矩形截面型材三维多点拉弯成形减薄率

Rectangular section profile thinning rate of three-dimensional multi-point stretch bending process

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参考文献 16

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间距值	l/L	实测外腹板减薄率/%	模拟外腹板减薄率/%	实验内腹板减薄率/%	模拟内腹板减薄率/%
142	0.1	0.90	0.96	0.71	0.695
284	0.2	0.99	0.97	0.94	0.980
426	0.3	1.28	1.25	1.40	1.150
568	0.4	1.35	1.32	1.26	1.220
710	0.5	1.31	1.34	1.15	1.480
852	0.6	1.45	1.41	1.46	1.620
994	0.7	1.64	1.68	1.65	1.680
1136	0.8	1.92	1.88	1.74	1.770
1278	0.9	2.13	2.17	1.88	1.850
1420	1.0	2.40	2.35	1.82	1.820