Tool Clamping Sleeve Structure for Corrosion-Resistant Precision Holding

The patent replaces expensive, corrosion-prone beryllium-copper clamping sleeves with inexpensive, corrosion-resistant plastic clamping sleeves. The plastic sleeves are designed to be replaceable if needed, but their corrosion resistance eliminates the degradation issues of metal sleeves. This substitution directly addresses the contradiction by sacrificing the mechanical durability of metal (which is compensated by the expansion element design) to gain corrosion resistance.

The invention uses plastic (polymer) material for the clamping sleeve instead of metal, creating a composite solution that combines corrosion resistance with adequate mechanical properties through clever structural design. The plastic material itself provides corrosion resistance, while the expansion element geometry provides the necessary mechanical holding force.

The patent employs a dynamic expansion element that can deflect radially outward to provide high holding forces when needed, while returning to a neutral position that maintains precise positioning. The expansion element's elastic deformation capability allows it to adapt to load conditions, providing high holding force during tool changes while maintaining manufacturing precision during normal operation.

The invention changes the physical state and geometry of the expansion element dynamically - it can be compressed during insertion, then expands radially to engage with the tool shaft. This parameter change allows the same element to provide both precise positioning (when relaxed) and high holding force (when expanded), resolving the contradiction between reliability and manufacturing precision.