Creating an Escape Wheel and Pallet Fork using LiGa (Lithography-Galvanoforming-Abrasion) technology represents a significant advancement in precision engineering for timepieces, particularly for high-end horology and mechanical watches.
Here's an expanded look at the concept for both components: The Escape Wheel and Pallet Fork is a critical component of the escapement mechanism, responsible for transmitting the regulated energy from the gear train to the balance wheel in precise, controlled increments. Using the LiGa process to manufacture the escape wheel and pallet fork yields several advantages:
1. Precision Through Lithography: The escape wheel's design, including its teeth, is formed using lithography. This technique allows for the creation of extremely fine and detailed geometries that would be difficult to achieve using conventional machining. The wheel’s teeth can be crafted with accuracy, ensuring perfect alignment and interaction with the pallet fork, which is essential for efficient energy transfer and reliable timekeeping.
2. Galvanoforming for Strength and Durability: After the lithographic pattern is developed, the galvanoforming process builds the escape wheel and pallet fork for by depositing metal atoms layer by layer, resulting in an exceptionally smooth and precise structure. This method ensures the wheel’s durability and robustness, especially important for withstanding the constant motion and impact during the operation of the escapement.
3. Abrasion for Perfect Finish: The final stage, abrasion, polishes the surfaces of the escape wheel, reducing friction at the contact points where it engages with the pallet fork. This low-friction surface ensures a smoother transfer of energy, contributing to the overall efficiency and accuracy of the watch mechanism. It also minimizes wear and tear of the escape wheel.
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