Abstract
Multi-pass conventional spinning is the preferable forming technology for the forming of thin-walled conical part with curved surface (TCPCS) in aerospace field. In multi-pass conventional spinning, the design of roller path is a critical problem due to its sensitive effect on the deformation mode and forming defect during spinning process. However, at present, the roller path is still mainly designed based on experience and trial and error, which seriously restricts the high-performance spinning of TCPCS. In this work, a new quantitative method based on circumferential strain distribution was developed for the roller path design in multi-pass conventional spinning of TCPCS. In this method, the total required circumferential strain for the forming of final TCPCS by conventional spinning was firstly determined. Then, the spinning passes number was obtained through dividing the total required circumferential strain by the ultimate circumferential strain producing the spinning instability. As for the roller path profile in each pass, it is divided into two sections and determined, respectively, i.e., the attaching mandrel section and the preforming section. The attaching mandrel section presents the same profile of mandrel. The profile of preforming section is determined point by point by distributing the rest of circumferential strain to produce the final TCPCS. The point-by-point distributed circumferential strain is half of the the total required circumferential strain in the initial stage until it reaches the half of the ultimate circumferential strain, and then, it will keep the half of the ultimate circumferential strain to the end. The proposed new method of roller path design was validated by finite element simulation, where well spinning stability, wall thickness distribution and roundness were obtained. This method provides a quantitative, high-efficient and universal way for the roller path design in conventional spinning of TCPCS.
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Acknowledgements
This study is supported by National Natural Science Foundation of China (No. 92060107, No. U1737212) and National Major Science and Technology Projects of China (J2019-VII-0014-0154).
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Yongdi Wang conceived the method and wrote the manuscript. Pengfei Gao directed and improved the method and put forward valuable suggestions for the writing of the article. Mei Zhan and Hongwei Li participated in article revision and provided project support. The contributions of Xinggang Yan and Haotong Niu lay in the discussion of previous methods and the inspection of manuscript, respectively. All authors discussed the results and commented on the manuscript.
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Wang, Y., Li, H., Gao, P. et al. A method based on circumferential strain distribution for roller path design in conventional spinning of thin-walled conical part with curved surface. Int J Adv Manuf Technol 119, 4509–4518 (2022). https://doi.org/10.1007/s00170-022-08661-y
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DOI: https://doi.org/10.1007/s00170-022-08661-y