Twisted Wire Untwisting Control to Protect Root-Side Integrity
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Solution Overview
Problem
Existing twist correction devices apply excessive load on the root side of twisted wires during untwisting, which can weaken the wire's structural integrity.
Innovation Solution
A twist correction device and method that holds the twisted wire away from its tip and uses a pair of gripping elements to untwist it by sliding from the root to the tip, with controlled gripping forces and movements to minimize load on the root side.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional twist correction device slides under pressure from the root side to the tip side of the twisted wire, then the twisted wire can be untwisted, but excessive load is applied to the root side which weakens the wire's structural integrity
Solution Approach 1:
The patent inverts the conventional untwisting approach by gripping the wire at multiple points and applying forces in opposite directions. Specifically, the first gripping element grips near the root while the second gripping element grips near the tip, and they move in opposite directions to untwist the wire, thereby distributing the load and preventing excessive stress on the root side.
Solution Approach 2:
The patent changes the parameters of the untwisting process by dynamically adjusting the gripping forces and movement speeds of the gripping elements. The controller regulates the driving forces of both gripping elements, allowing them to move at different speeds and with different forces, which optimizes the untwisting process while minimizing damage to the wire structure.
2Ease of operation
If the pair of gripping elements operates with larger gripping force and larger position offset amount on the root side, then untwisting can be achieved, but the load on the root side increases excessively
Solution Approach 1:
The patent implements feedback control through the controller that monitors and regulates the driving forces of both gripping elements. The controller adjusts the gripping forces and movement parameters based on the actual state of the wire during untwisting, ensuring that the load on the root side remains within acceptable limits while still achieving effective untwisting.
Solution Approach 2:
The patent makes the untwisting process dynamic by allowing the gripping elements to move at different speeds and with different forces. The first gripping element near the root moves at a different speed and with different force compared to the second gripping element near the tip, which dynamically balances the load distribution during the untwisting operation.
Data Source
AI summary
A twist correction device includes an untwisting mechanism and a controller, the untwisting mechanism being configured to grip a multi-core twisted wire by means of a pair of gripping elements, wherein the pair of gripping elements is configured to slide together toward a tip side of the multi-core twisted wire while performing a relative stroke position offset movement of the pair of gripping elements in a direction of untwisting for untwisting the multi-core twisted wire, wherein when the pair of gripping elements is positioned on an exposure side end side of the multi-core twisted wire, the controller is configured to perform operation control with a smaller gripping force in a twist gripping direction as well as a smaller operation force and a smaller position offset amount for the stroke position offset movement than when the pair of gripping elements is positioned on the tip side.