Drain Wire Twisting Control to Prevent Strand Breakage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing drain wire correcting devices face challenges in effectively shaping and twisting drain wires without causing strand breakage or insufficient twisting due to varying gripping forces, leading to difficulties in post-processing tasks like insertion into heat-shrink tubes.
Innovation Solution
A drain wire correcting device comprising a retention device, a gripping member, a drive device, a moving device, and a controller that executes squeeze control to organize strands, followed by rotation control to twist the wire with increased gripping force, and release control to prevent strand breakage, ensuring proper shaping and twisting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the gripping force of the gripping member is strong, then the drain wire can be twisted effectively by rotation, but the strands of the drain wire are likely to be cut during movement
Solution Approach 1:
The gripping force is made dynamic by switching between two modes: a first gripping force during movement that is sufficient to prevent slippage but limited to avoid strand breakage, and a second gripping force during rotation that is stronger to ensure effective twisting. This dynamic adjustment resolves the contradiction between effective twisting and strand protection.
Solution Approach 2:
The correction process is divided into periodic phases: a movement phase where the gripping member moves along the drain wire with controlled gripping force, and a rotation phase where the gripping member rotates to twist the wire with increased gripping force. This periodic alternation allows the system to achieve both strand organization and effective twisting without causing damage.
2Object-affected harmful factors
If the gripping force of the gripping member is weakened, then the strands of the drain wire are less likely to be cut, but the drain wire is likely to slip against the gripping member during rotation
Solution Approach 1:
The gripping force is dynamically adjusted based on the operational phase: reduced during movement to prevent strand breakage while maintained at adequate levels during rotation to prevent slippage. This dynamic control resolves the contradiction between grip stability and strand protection.
Solution Approach 2:
Before rotation occurs, the gripping member establishes adequate grip on the drain wire strands. This preliminary gripping action ensures that when rotation subsequently occurs, the wire will not slip. The system prepares the grip condition in advance to ensure reliability during the critical twisting operation.
3Shape
If the gripping member moves strongly along the drain wire, then the strands can be organized straight, but the strands of the drain wire are likely to be pulled and cut
Solution Approach 1:
The gripping force during movement is dynamically controlled to be sufficient to organize and straighten the drain wire strands along its length, but limited to a maximum level that prevents strand breakage. This dynamic force control allows effective straightening without causing damage.
Solution Approach 2:
The gripping force parameter is changed and controlled within a specific range during the movement phase. By adjusting this parameter to an optimal value that is strong enough to organize strands but weak enough to prevent breakage, the system achieves straightening without damage.
Data Source
AI summary
A drain wire correcting device 10 includes: a retention device 20 configured to retain a sheathed portion 1a of a multi-core cable 1; gripping members 41, 42 configured to grip a drain wire 2 on an axis Ax; a moving device 60 configured to move at least one of the multi-core cable 1 and the gripping members 41, 42 along the axis Ax; and a rotating device 70 configured to rotate at least one of the multi-core cable 1 and the gripping members 41, 42 around the axis Ax. The drain wire correcting device 10 executes a squeeze control of moving the gripping members 41, 42 along the axis Ax while the gripping members 41, 42 are in contact with the drain wire 2, thereby squeezing the drain wire 2 toward a distal end side, and executes, after the squeeze control, a rotation control causing the gripping members 41, 42 to grip the drain wire 2 with a gripping force increased from that in the squeeze control and rotating the gripping members 41, 42 around the axis Ax.