Transactions of Materials and Heat Treatment

Title：Hydroforming process of fork tube parts

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ClassificationCode：V262

year,vol(issue):pagenumber：2022,47(1):81-90

Abstract：

The fork tube parts of a certain military aircraft have the characteristics of complex structure surface and large curvature change, and the traditional forming method mainly adopts the method of falling pressure forming, which has problems such as wrinkles, cracks and poor surface quality during the forming process. Therefore, the passive hydroforming was put forward to form the fork tube parts, and the finite element analysis model was established by finite element software ANSYS/LS-DYNA to simulate the passive hydroforming process. The influences of different blank holder forces on the hydroforming was studied. From the simulation results, a reasonable blank holder force was 300 kN, and the simulation results were finally verified by experimental research. Furthermore, the qualified parts were trial-produced, and the optimal process parameters of passive hydroforming for fork tube parts were obtained with the blank holder force of 300 kN, the pressure chamber of 8 MPa and the blank-holder clearance of 1.05 mm. In addition, the maximum thinning rate was controlled within 20% after part forming, the suitable process method for fork tube parts forming was found, which provided theoretical and data support for forming parts with complex deep cavity or box shape by numerical simulation analysis.

Funds：

四川省重点研发项目（2018G20063）

作者简介：葛蒙召（1989-），男，学士，工程师 E-mail：gemz183@163.com

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