Square Can Tool Gap Profile for Uniform Long Wall Thickness

The patent applies asymmetry by making the die and punch configurations asymmetric rather than symmetric. Specifically, the die long side wall machining part has different gap distances at different positions along the long side direction, and the punch long side wall machining part is positioned asymmetrically relative to the die. This asymmetric configuration compensates for the deflection that occurs during drawing and ironing, thereby achieving uniform thickness distribution in the long side wall of the square can.

The patent applies local quality by varying the gap distance between the die and punch at different locations along the long side direction. The gap distance is smaller at certain positions and larger at others, creating locally optimized machining conditions. This local variation in gap distance allows for compensation of deflection in different regions, achieving uniform thickness distribution throughout the long side wall.

The asymmetric positioning of the punch relative to the die, and the asymmetric gap distance configuration, are specifically designed to handle high flatness ratio requirements. The asymmetry creates differential gap distances that compensate for the increased deflection caused by higher flatness ratios, allowing the square can to achieve both the desired shape and uniform thickness distribution.

The patent changes the geometric parameters of the die and punch configurations, specifically the gap distance between the die long side wall machining part and punch long side wall machining part. By optimizing these parameters asymmetrically, the patent enables the production of square cans with high flatness ratios while maintaining uniform thickness distribution in the long side walls.

The patent achieves high manufacturing precision through optimized geometric parameter configuration rather than through expensive materials. By carefully designing the asymmetric gap distances and positioning relationships between die and punch components, the patent attains the required shape accuracy using conventional materials, thereby avoiding the increased manufacturing cost associated with cemented carbide or other costly materials.

The patent applies local quality optimization through asymmetric gap distance configuration, creating locally optimized machining conditions in critical areas. This localized optimization achieves high shape accuracy in the long side walls without requiring expensive materials throughout the entire die and punch assembly, thus maintaining cost-effectiveness while improving precision where it matters most.