Double-Acting Friction Stir Spot Welding Tool for Gap Debris Ejection

The patent applies the dynamics principle by making the gap between the probe and shoulder member variable rather than fixed. The gap width changes dynamically during the welding process - smaller when the tool is stationary or moving slowly, and larger when the tool is rotating at high speed. This dynamic adjustment allows the gap to adapt to different operational phases, preventing material adhesion during low-speed phases while maintaining adaptability to different plate thicknesses during high-speed welding operations.

The patent implements parameter changes by modifying the physical dimensions of the gap between the probe and shoulder member based on operational conditions. The gap width parameter is adjusted according to the rotational speed of the tool - narrower at low speeds to prevent material entry, and wider at high speeds to accommodate thickness variations. This parameter adjustment resolves the contradiction between maintaining adaptability and ensuring operational repeatability.

The patent uses the dynamics principle to make the gap width adjustable and variable. During welding operations, the gap dynamically adjusts its width - narrower when precision independent movement is needed, and wider when material ejection is the priority. This dynamic control allows the system to optimize for either preventing material adhesion or facilitating material ejection depending on the operational phase, resolving the contradiction between these two requirements.

The patent applies periodic action by creating oscillating or reciprocating movements of the probe and shoulder member relative to each other. This periodic movement periodically opens and closes the gap, creating conditions that prevent continuous material adhesion while still allowing periodic material ejection. The rhythmic variation in gap width prevents material from continuously accumulating and adhering, while maintaining the ability to eject accumulated material periodically.

The patent implements dynamics by making the gap width a variable parameter that changes during the welding process. The gap is narrow during phases when preventing material entry is critical, and widens during phases when material ejection is needed. This dynamic adjustment allows the system to suppress material adhesion when necessary while maintaining efficient material ejection capability when required, resolving the contradiction between these two opposing requirements.

The patent applies parameter changes by adjusting the gap width parameter in response to different operational conditions. When material ejection is needed, the gap width parameter increases to facilitate material removal. When preventing material entry is the priority, the gap width parameter decreases. This parameter control strategy resolves the contradiction between suppressing material adhesion and maintaining material ejection efficiency.