## 5 Conclusions  
This article presents a novel, quick-pressing, self-locking temporary fastener designed for pre-joining aircraft wall panels. The working principles of the fastener are comprehensively calculated and explained, and its feasibility is experimentally validated.  
1. This research has proposed a quick-pressing self-locking temporary fastener to address the issues of low work efficiency and the cumbersome installation of traditional bolts for panels. This fastener can not only carry out automatic bonding of thin-walled metal components, but it can also perform unilateral fastening and detaching.
2. The major components of this temporary fastener are theoretically calculated and statically analyzed. Aiming at the temporary connection of thin-walled plates with a large area, this temporary fastener is meant to achieve single-sided quick assembly and disassembly through the organic combination of a ratchet mechanism, clamping mechanism, and spring. After its analysis and verification, all parts satisfied work requirements under normal settings and proved the device's practicality.
3. An experiment with a quick-pressing self-locking temporary fastener was performed. According to the results of the experiment, this temporary fastener had a high installation efficiency and could reach the required range of clamping force. Its movement status is essentially compatible with the established movement circumstances. The measured forces and the theoretical calculation values are both within a defined error range, with errors of 8.01% and 4.53%, respectively. The experiment results have shown that the temporary fastener could perform the tightening function, and its effect is close to the theoretical effect. Meanwhile, this fastener can perform unilateral operations, fast loading and unloading, recycling, and improving efficiency, which makes it suitable for large-scale application in automated panel manufacturing.
4. In addition to the assembly of thin-walled aircraft parts, this fastener can also be employed to assemble thin-walled vehicle parts. For example, after the sheet metal components have been positioned and clamped, fasteners are used to connect two or more sheet metal pieces in order to remove the gaps between or among the sheet metal parts, allowing the sheet metal parts to be welded.  
Conceptualization, W.T. and W.Q.; methodology, W.T.; validation, Y.X.; formal analysis, J.H.; investigation, J.H.; resources, C.L.; data curation, Y.X.; writing--original draft preparation, J.H.; writing--review and editing, W.T.; visualization, J.H.; supervision, J.Y.; project administration, W.T. and W.Q.; funding acquisition, W.T. and H.L. All authors have read and agreed to the published version of the manuscript.  
This research was funded by School-level Scientific Research Project of Shaoguan University (No. SZ2020 KJ12), National Natural Science Foundation of China (No. 51775495) and Scientific Research Project of Shaoguan University for Talent Introduction (No. 440-99000620).  
**Institutional Review Board Statement:** Not applicable.  
\begin{table}
\begin{tabular}{c c c} \hline
**Reuse** & **Unilateral Operation** & **Self-Locking** \\ \hline Adopt a four-petals claw structure with elastic, which can be recycled. & Only need to press one button continuously to realize clamping and uninstalling. & Coordination among the spring, the clamping jaw and shell with buckle, to hold the claw firmly. \\ \hline \end{tabular}
\end{table}
Table 4: Advantages of fastener.