Loom Heddle Frame Detection Targets
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Solution Overview
Problem
Existing pulling mechanisms for heddle frames in looms are limited in precision and flexibility due to bulky detection devices and high manufacturing costs, making it difficult to accurately analyze and monitor the movement of heddle frames, especially in high-speed operations within a confined space.
Innovation Solution
A pulling mechanism with a detection device featuring interchangeable measurement targets mounted on oscillating levers and stabilizers, allowing for easy installation and use, which includes a set of connecting rods and levers configured to drive heddle frames in an alternating movement, and equipped with sensors for precise monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If measurement targets are integrated into the oscillating levers through machining, then measurement capability is provided, but manufacturing cost increases and manufacturing flexibility decreases
Solution Approach 1:
The measurement target is separated from the oscillating lever, becoming an independent replaceable component. This allows the lever to be manufactured separately using standard processes, while the target can be manufactured optimally for its measurement function using different materials and techniques, thereby improving both measurement capability and manufacturing flexibility.
Solution Approach 2:
The oscillating lever is designed with a universal mounting interface that can accommodate different types of measurement targets. This allows the same lever structure to work with various target designs (different materials, shapes, mounting methods), providing manufacturing flexibility and ease of customization without compromising measurement precision.
2Measurement precision
If bulky detection devices are used, then measurement capability is provided, but device complexity and installation difficulty increase
Solution Approach 1:
The measurement target is extracted from the complex internal structure of the oscillating lever and placed on its external peripheral surface. This simplifies the lever's internal design and manufacturing, while the target itself remains a simple disc-shaped component that is easy to manufacture and install, reducing overall device complexity.
Solution Approach 2:
Instead of incorporating complex measurement sensors into the lever, a simple geometric target (disc shape) is used that can be detected by external sensors. This target acts as a simplified representation or copy of the lever's positional information, enabling precise measurement without adding complexity to the lever structure.
3Measurement precision
If measurement targets are fixed permanently on oscillating levers, then measurement precision is maintained, but adaptability and ease of adjustment decrease
Solution Approach 1:
The mounting system transitions from a fixed permanent attachment to a dynamic reversible connection. The target can be easily mounted and dismounted using the interference fit system with elastic deformation, allowing the measurement setup to be adapted to different requirements while maintaining precise measurement capability through consistent mounting geometry.
Solution Approach 2:
The mounting parameters (interference fit tolerance, elastic deformation amount) are designed to provide a balance between secure attachment for measurement accuracy and ease of removal for adaptability. By controlling these parameters, the system achieves both precise measurement and flexible adjustability without requiring permanent fixation.
Data Source
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AI summary
This draw mechanism for controlling heddle frames of a loom equipped with a shear-forming machine comprises, for each heddle frame, a set of connecting rods and oscillating levers (72) coupled to the set of connecting rods, for transmitting motion from the shear-forming machine to the heddle frame. The draw mechanism includes at least one measuring portion (72C), equipped with a target (100) configured to cooperate with a sensor (110). For easier mounting and dismounting of the targets on the measuring portions, each measuring portion is provided on a peripheral wall of one of the elements selected from among one of the oscillating levers (72), or a stabilizer of the draw mechanism, the target being mounted reversibly on the measuring portion (72C).