Autonomous Warp Thread Tensioning Device with Segmented Guide Rail
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Solution Overview
Problem
Existing automatic threading machines for weaving are complex, costly, and require precise positioning of heavy units, leading to high operational costs and error rates, while semi-automatic machines offer limited productivity gains and high error rates due to manual intervention.
Innovation Solution
A clamping device that moves autonomously along a guide rail with a single drive, featuring a tensioning unit with three rod elements and a locking mechanism, allowing flexible and precise re-tensioning of warp threads without the need for expensive rail systems or steel plates, and a drawing-in device that integrates with this tensioning unit for continuous processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If automatic threading machines with heavy movable units are used, then threading precision can be achieved, but device complexity and operational costs increase significantly
Solution Approach 1:
The device is divided into two independent support elements (first support element with guide rail, second support element with tensioning unit) that can move independently along the guide rail. This segmentation allows each element to perform its specific function with simplified mechanics, eliminating the need for complex kinematic coupling between heavy units while maintaining positioning precision through individual controlled movement.
2Measurement precision
If heavy units with complex kinematics are used for positioning, then positioning accuracy can be achieved, but operational costs and maintenance requirements increase
Solution Approach 1:
The tensioning unit is designed to move autonomously along the guide rail using a single drive mechanism. The first support element provides stable guidance through the guide rail, while the second support element with the tensioning unit moves independently to apply tension where needed. This self-service design eliminates complex positioning systems and reduces operational complexity while maintaining accurate positioning capability.
3Force
If partial tensioning is applied to reduce forces on the thread frame, then force requirements are reduced, but the tensioning must be repeatedly released and re-applied during displacement
Solution Approach 1:
The tensioning unit is designed to move dynamically along the guide rail with the ability to tension different sections of the warp thread layer sequentially. By moving the tensioning unit along the guide rail, continuous tensioning can be maintained across different sections without repeated release and re-tensioning, as the unit simply transitions to the next section while maintaining operational readiness.
Data Source
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AI summary
The clamping device (S) has two supporting elements (S-10,S-20), where a space between the supporting elements is changeable by a connected adjustment mechanism (S-30). The adjustment mechanism is connected with guide elements (S-11, S-11',S-21), over which the supporting elements are releasably connected with a common guide rail (FS). A clamping unit (S-40) is movable along the guide rail using the adjustment mechanism. Independent claims are also included for the following: (1) an assembly of a clamping device and a clamping frame for mounting a warp-thread layer; (2) a retraction device for warp threads of a warp-thread layer in elements of a weaving harnesses; and (3) a method for tightening of warp threads of a warp-thread layer by using a clamping device.