Experiment of Laser Assisted Shear Spinning for Aluminum Alloy Spherical Thin-Walled Parts

doi:10.16183/j.cnki.jsjtu.2022.166

Abstract

Abstract:

Thermal energy field is the main way to improve the formability and dimensional precision of components in sheet forming. In order to solve the temperature fluctuation of traditional heat sources, a well-controlled laser heat source was introduced into sheet metal shear spinning to improve the spinnability and forming accuracy by matching local deformation with local heating reasonably. Laser-assisted shear spinning facility was built based on the existing spinning machine, and a model of laser irradiation point drift of ellipsoidal components under the rigid connection of laser heat source was established to analyse the optimal region of laser thermal field loading. The theoretical analysis shows that, during laser-assisted spinning, the rigid connection can be deemed as precise heating under the condition of mandrel with small variation of section circle radius. Subsequently, laser-assisted shear spinning tests on the thin-walled aluminum alloy ellipsoidal components were conducted. The results show that, compared with cold spinning, the laser assisted method extends the spinnability of difficult-to-deformation material in shear spinning and significantly improves the precision and thickness of the spun thin-walled components, which verifies the feasibility of the developed test setup and process design method.

Key words: aluminum alloy, thin-walled component, laser assisted spinning, formability, process design

CLC Number:

TG306

RAN Jinyu, WANG Fengqi, YU Zhongqi, DU Chenyang, EVSYUKOV S A. Experiment of Laser Assisted Shear Spinning for Aluminum Alloy Spherical Thin-Walled Parts[J]. Journal of Shanghai Jiao Tong University, 2023, 57(10): 1337-1345.

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温度/℃	比热/(J·g^-1·K^-1)	导热系数/(W·mm^-1·K^-1)
300	1.01	175
350	1.03	178
400	1.06	182
450	1.09	185
500	1.12	188
550	1.15	192
600	1.18	195

材料	初始板厚/mm	旋轮圆角半径/mm	进给比/ (mm·r^-1)	P/W	离焦距离/cm	恒线速度/ (mm·s^-1)	Δx/mm
7075-T6	1.85	5	0.5	1200	11	100	2.2
2024-O	2.32	5	0.5	400	11	200	3.4