## 1 Introduction  
In traditional aircraft manufacturing processes, numerous fasteners are used with parts in connection, and they play an important role in position and support. Traditional aircraft panel assembly often uses bolts for pre-joining, but the positioning accuracy and efficiency of bolts are not ideal. The clamping force cannot be accurately controlled by the intuitive judgment of workers, and the consistency of the clamping force cannot be guaranteed. At the same time, bilateral operations are required for bolts, which results in a cumbersome process and low efficiency. It is difficult to realize automated assembly for bolts, which directly affects the quality and efficiency of subsequent aircraft riveting assembly and has become a technological bottleneck in aircraft manufacturing processes.  
Since the 1990s, scholars at home and abroad have conducted a number of studies on fasteners for thin-walled parts. Threaded connections are the most commonly used traditional technology [1, 2]. [PERSON] et al. [3] summarized the reasons for and mechanisms of non-rotating and rotating loosening on threaded connections. [PERSON], [PERSON] et al. [4] conducted a sample test on a direct fastening connection and proposed a modified expression for the yield strength of the connection. In order to solve the connection problem of steel pipe structures, some scholars [5, 6] have developed special bolts, such as HSBB bolts, BOM bolts, and Ultra-Twist bolts, produced by the American company Huck International.  
Furthermore, in response to the problem of excessive connections in traditional panel assembly, [PERSON] et al. established a pre-joining optimization model and verified it through experiments, which could effectively reduce the number of pre-joining points [7; 8; 9]. However, they did not involve the design and optimization of pre-joining fasteners. In addition, [PERSON] et al. [10; 11; 12; 13] have conducted studies on the application of blind rivet nuts. [PERSON] [14] presented a novel form of T-shaped single-sided bolt connections for steel beams and hollow square steel tubes. Other researchers have proposed alternative connectors, such as the rotating slotted bolt connection [15], the high-strength single-sided bolt joint [16], and other fasteners for single-sided connections [17; 18; 19]. These above-mentioned fasteners can also be fitted on one side, but their structure is too complex to install on panels, or the operation must be tightened many times, making the operation laborious, inefficient, and difficult to process, so they are not ideal for connecting aircraft parts. To solve the traditional pre-joining process problems of large tightening torque and inconvenient bilateral tightening, [PERSON] et al. [20] proposed a new temporary fastener that is labor-saving and reversible, which was performed by experiment. However, this fastener needs to be rotated back and forth during installation, and this installation process is not as simple as linear motion.  
In order to overcome the shortcomings and deficiencies of traditional technology, this paper designs a quick-pressing temporary fastener with self-locking capabilities that is convenient for automatic installation and removal. When fastening or removing, it needs only one-side continuous pressing operation to carry out the above-mentioned work, that is, one-button installation and removal, which is conducive to the combination of the fasteners and automation, and is more compatible with automatic equipment loading and unloading to improve efficiency. Finally, this paper builds a model with 3D software, theoretically analyzes the critical state and final state of temporary fastener pressing, and designs an experiment to verify its actual effect.