Cylindrical 3D Printing System for Rotating Parts

The patent applies spheroidality by replacing the conventional linear Cartesian coordinate system with a cylindrical coordinate system that incorporates rotational motion. The nozzle moves along a circular arc trajectory defined by polar coordinates (r, θ, z) instead of linear paths, enabling direct printing of circular arcs and complex geometrical curves. This curved motion path matches the natural geometry of rotating parts, significantly improving printing accuracy and surface roughness for complex shapes.

The patent implements dynamics by introducing a revolute joint that enables rotational motion of the nozzle assembly around the Z-axis. This dynamic component allows the printing system to adapt its motion trajectory from purely linear to rotational, facilitating direct printing of circular arcs. The dynamic addition of rotational capability resolves the contradiction by enhancing precision for complex geometries while maintaining relative structural simplicity through modular joint design.

The patent applies dynamics by transforming the fixed printing platform into a retractable platform with adjustable radius. The platform can dynamically extend or retract along the radial direction to accommodate different part sizes. This dynamic adjustment capability is achieved through a retractable mechanism that modifies the platform's radial dimension, enabling the same device to handle both small and large parts without requiring multiple fixed-size platforms.

The patent implements universality by designing a single retractable platform that can serve multiple functions across different printing scenarios. The platform's ability to adjust its radial size allows it to universally accommodate various part dimensions, replacing the need for multiple fixed-size platforms. This multi-functional design enhances adaptability while avoiding the complexity of maintaining separate platforms for different part sizes.

The patent applies spheroidality by implementing direct circular arc motion through rotational movement around the Z-axis. Instead of approximating circular arcs with linear segments, the nozzle follows an exact circular path defined by the cylindrical coordinate system's angular component (θ). This eliminates approximation errors and accumulative deviations, significantly improving both printing accuracy and efficiency for rotating parts and complex geometrical curves.

The patent substitutes the conventional linear mechanical motion system with a rotational motion system based on cylindrical coordinates. By replacing linear translation along X and Y axes with rotational movement around the Z-axis combined with radial and vertical translation, the system achieves more efficient and accurate printing of complex geometries. This mechanical substitution reduces movement errors while maintaining structural feasibility through the use of standard rotational joints.