Based on an analysis of clamping methods for the automatic assembly of small solid rockets, clamping force calculation, simulation, and experimental verification were carried out for different clamping solutions. The results show that when using a three-jaw chuck fitted with a 0.5 mm thick graphite rubber pad between the chuck jaws and the rocket shell, a clamping pressure of 0.5 MPa can prevent slippage even under the maximum torque load of 390 N？m. The resulting deformation has no adverse impact on product quality and assembly performance. Considering the profile characteristics of the clamping surface of small solid rockets and economic efficiency, a universal clamping tooling was designed. This work lays a foundation for the automatic assembly of small solid rockets.
References
[1]
Sutton, G.P. and Biblarz, O. (2017) Rocket Propulsion Elements. 9th Edition, Wiley.
[2]
Wang, H.Q., Zhang, D.W., Liao, J.Y., et al. (2025) Research on Overall Scheme Design of Automatic Assembly of Solid Small Rockets. Dynamics Systems and Control, 14, 151-159.
[3]
Liu, Y.Q. (1993) Preliminary Study on Snap-Ring Connection Structure of Solid Rocket Motor Nozzle and Case. Journal of Solid Rocket Technology, 1, 1-5. (In Chinese) https://kns.cnki.net/kcms2/article/abstract?v=QP2K49WHhimGshRjuN0kPA9tC6JFwx8TlP18y7jVFY0sPThvz-svwJ0GWca0vhybXpn9aoSYCmTFn24f0RxuB86LBFkxrxKSTIxPCgNyY8638Wg5EBjCvvzqWPjtQ88suKnAIodfMvSdP1Fu8u8yODHgmORetR1M&uniplatform=NZKPT
[4]
Wang, M. and Yan, P.Y. (2002) Application of Sealing Material to Threaded Joint. Aerospace Materials & Technology, 3, 33-35. https://www.yhclgy.com/yhclgy/article/abstract/2310?st=alljournals
[5]
Hu, S.H., Wang, N.H. and Wang, H.Q. (2016) Clamping System Modification for Automatic Assembly Equipment of Small-Scale Rocket. Manufacturing Technology & Machine Tool, 9, 95-98. (In Chinese) https://kns.cnki.net/kcms2/article/abstract?v=QP2K49WHhinPst3fL3erolltSb7ZxaeMZZ7tmAF0iXzFkEdeT5J9xgmkK7fBjxGLz7hNutP4IDE6Z3cK5BEqh_PSikYx_hUUzKwEUUCnDPB4MYFLMaw_qsKc7jAZ0URzJszuZv4m5bxI69oQSJoHboH5T9Ap4CyC5OUl-NYB4u78MGK_mODM6g==&uniplatform=NZKPT&language=CHS
[6]
Wang, H.Q., Zhuang, X.W., Zhang, D.W., et al. (2025) Research on On-Line Measurement Method of Seal Compression during Torque Loading of Small Solid Rocket. Journal of Aerospace Science and Technology, 13, 15-22. (In Chinese) https://doi.org/10.12677/jast.2025.132002
[7]
Zhang, J.C., Xu, Z.G., Wang, J.Y., et al. (2023) Online Stress Prediction Method for Sealing Ring during SRM Docking Assembly. Journal of Solid Rocket Technology, 46, 287-296. (In Chinese) https://gthjjs.spacejournal.cn/article/doi/10.7673/j.issn.1006-2793.2023.02.013
[8]
Wu, F., Lin, J.D. and Zhao, X.Q. (2017) Research on Tightening Control of Solid Rocket Engine Based on Expert Prediction. In: 2017 IEEE 29th Chinese Control and Decision Conference (CCDC), IEEE, 4021-4025. https://api.semanticscholar.org/CorpusID:27694447
[9]
General Administration of Quality Supervision, Inspection and Quarantine of the PRC, Standardization Administration of China (2011) GB/T 16823.3-2010 Fasteners—Torque/Clamp Force Testing. Standards Press of China. https://openstd.samr.gov.cn/bzgk/std/newGbInfo?hcno=99C3BB8F68870D09E63B7297D4C92A38
[10]
Zhang, J., Wang, Y., Wang, J., et al. (2023) Online O-Ring Stress Prediction and Bolt Tightening Sequence Optimization Method for Solid Rocket Motor Assembly. Machines, 11, Article 387.
[11]
Liu, T. (2022) Design and Development of Automatic Screw Tightening Equipment Based on Torque Control. Industrial Instrumentation & Automation, 4, 137-140. (In Chinese) https://kns.cnki.net/kcms2/article/abstract?v=QP2K49WHhikVUgGJv4WrNZ2F44z3q0_yZYy63MuSYhzV_hQmHzjAM44Bm-GRh-1lKax56twcCkTa_yxvlZehL214_QPRQJa5TDMWY1tHqZRwykwtktWZmogphuopJK7rAklQ-TNFb5P6pzDS8BY0MMVVoLhcoOpsTVhTpJEDldU=&uniplatform=NZKPT&language=CHS
[12]
Liu, M. and Li, G. (2021) Research on Station-Level Intelligent Thread Assembly System. Manufacturing Automation, 43, 124-128. (In Chinese) https://kns.cnki.net/kcms2/article/abstract?v=QP2K49WHhikg9obCQEecW-gpRUUJeQdvJe0IW2EMtkJVbqiwetdxZDPDvY-AeZJQmT5A0VXe7HPsCyEu3fJWHMEiEybd-FUd2XrmZyUNcvRxeSSYBiK1XjS-8sOMsrKM4gmVeYSB9BrVSiOJmjG9HSqPWPn-ztNpvZ-t-xCl9ITUz7X8uFtFCA==&uniplatform=NZKPT&language=CHS
[13]
Liang, Y., Peng, E.H., Wang, L.X., et al. (2022) Application and Management for Bolt Torques in Launch Vehicle Cabins. Journal of Nanjing University of Aeronautics & Astronautics, 54, 68-73. (In Chinese) https://jnuaa.nuaa.edu.cn/njhkht/article/abstract/2022s011?st=search
[14]
Zhao, H., Ge, D.S., Luo, L.Z., et al. (2023) Survey of Automated Flexible Docking Assembly Technology for Large-Scale Components. Journal of Mechanical Engineering, 59, 277-297. (In Chinese) https://qikan.cmes.org/jxgcxb/CN/10.3901/JME.2023.14.277
[15]
Chen, H.P., Zeng, P., Fang, G., et al. (2010) Load Distribution of Bolted Joint. Journal of Mechanical Engineering, 46, 171-178. (In Chinese) https://qikan.cmes.org/jxgcxb/EN/Y2010/V46/I9/171
