Coil Winding Feed Buffer for Constant Tension at Higher Speed
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Solution Overview
Problem
In the production of coils, particularly for electrochemical cells, the feed rate of strip-shaped articles limits production capacity, and high precision requirements lead to production line slowdowns, causing tension states that can compromise product quality.
Innovation Solution
An apparatus and method that involve a feed unit with a movable portion to vary the storage segment length of strip-shaped articles, allowing continuous feeding and winding without interruption, thus maintaining constant tension and improving precision and speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the feed rate of strip-shaped articles is increased to improve production capacity, then productivity increases, but manufacturing precision deteriorates due to tension states compromising product quality
Solution Approach 1:
The feed unit incorporates a movable portion that can dynamically adjust the storage segment length during operation. This dynamic adjustment capability allows the system to adapt to different production speeds while maintaining constant tension, thereby resolving the contradiction between increased productivity and manufacturing precision.
Solution Approach 2:
The system changes the parameter of storage segment length to optimize performance. By varying this parameter, the feed unit can maintain appropriate tension levels across different feed rates, enabling both high productivity and high precision coil winding without the compromise that would normally exist between these two parameters.
2Manufacturing precision
If the production line is slowed down to maintain high precision winding, then manufacturing precision is improved, but productivity decreases due to production line slowdowns
Solution Approach 1:
The movable portion enabling dynamic adjustment of storage segment length allows the system to maintain precise winding control without being forced to slow down production. The dynamic tension management decouples the relationship between production speed and winding precision that would normally require trade-offs.
Solution Approach 2:
The feed unit design enables continuous feeding and winding operations without interruption or slowdown. By maintaining constant tension through adjustable storage segments, the system achieves uninterrupted high-speed winding that simultaneously preserves manufacturing precision, eliminating the need to slow down for quality control.
3Productivity
If the strip-shaped article is fed continuously without interruption to increase speed, then productivity improves, but unwanted tension states are generated that compromise quality
Solution Approach 1:
The storage segment acts as an intermediary between the feed unit and winding unit, absorbing and regulating tension fluctuations. This intermediary mechanism allows continuous high-speed operation while preventing harmful tension states from being transmitted to the coil, thus enabling both high productivity and quality.
Solution Approach 2:
By adjusting the storage segment length parameter, the system can optimize tension distribution during continuous feeding. This parameter adjustment enables the maintenance of constant, controlled tension levels even at high winding speeds, preventing the generation of unwanted tension states that would otherwise compromise product quality.
Data Source
AI summary
An apparatus (100) for making a coil (B) comprises a feed unit (2) configured to feed at least one strip-shaped article (N) formed by a plurality of strips and a winding unit (1) that includes at least one winding head (10) configured to wind said strip-shaped article (N) to make said coil (B). The feed unit (2) comprises a movable portion (20), wherein respective feed paths (8) comprising a respective storage segment (81) are defined for each of the strips and is configured so as to vary, by moving said movable portion (20), the length of the storage segments (81), keeping said storage segments (81) substantially parallel to each other.