Multi-Strand Cable Diameter Consistency

The patent applies preliminary action by pre-assembling the internal and external wires into strands with controlled helical winding before the collective cable assembly step. This preliminary strand formation ensures that the internal wires are properly positioned and constrained within the strand structure, preventing their radial protrusion during the subsequent cable assembly process. The preliminary action of creating tightly controlled strands serves as a foundation that maintains diameter consistency in the final cable.

The patent segments the cable structure into distinct strands, where each strand is independently assembled with a specific number of internal wires (M) and external wires (P) wound helically. This segmentation allows for precise control of wire positioning within each strand, preventing the internal wires from protruding radially. By dividing the cable into manageable strands with controlled internal structures, the patent maintains overall cable diameter consistency while enabling efficient manufacturing.

The patent prevents the need for post-assembly corrections by implementing preliminary control measures during strand assembly. The internal and external wires are wound helically with specific pitch relationships established before cable assembly, ensuring that internal wires remain constrained and do not protrude radially. This preliminary action eliminates the need for additional insulation and cutting/joining operations, maintaining both diameter consistency and process simplicity.

The patent converts the potential harm of internal wire protrusion into a benefit by carefully controlling the helical winding parameters. By establishing specific relationships between the internal wire pitch (p1) and external wire pitch (p2), the patent ensures that the natural helical tendency of the wires works in favor of keeping internal wires constrained within the strand structure. This converts what could be a harmful protrusion effect into a beneficial self-constraining mechanism.

The patent applies parameter changes by establishing specific pitch relationships between internal and external wires. The key parameter control is maintaining the ratio p2/p2' > 1, where p2 is the external wire pitch and p2' is the intermediate pitch. This parameter relationship ensures that when the external wires are shortened during collective assembly, the internal wires are not subjected to excessive radial compression. By carefully adjusting and controlling these pitch parameters, the patent prevents internal wire protrusion while maintaining assembly efficiency.

The patent applies preliminary anti-action by pre-establishing the helical winding configuration with controlled pitch relationships before the collective assembly shortening occurs. The internal and external wires are initially wound with pitches that anticipate the subsequent shortening during cable assembly. This preliminary configuration creates a buffer that prevents the internal wires from being radially compressed and protruding when the external wires are shortened, effectively counteracting the potential harmful effect in advance.