Galvanising Wiping Device Guidance System with Perpendicular Axes
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Solution Overview
Problem
Existing systems for guiding and adjusting wiping devices on continuous galvanizing lines face challenges in providing a high degree of freedom for beam movement while minimizing mechanical constraints, particularly in handling altitude and horizontal adjustments, and accommodating thermal expansions, which can lead to misalignments and damage.
Innovation Solution
A guidance system featuring a carriage with three parallel linear guide tracks, including a central track and lateral tracks, equipped with two perpendicular axes of rotation and linear guidance aligned with the wiper's longitudinal axis, allowing for vertical and horizontal pivoting and linear movement, thereby providing four degrees of freedom to support beam ends.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a carriage with multiple guide tracks and rotation axes is used to guide the wiping device, then the degree of freedom for beam movement is increased and alignment precision is improved, but the device complexity increases
Solution Approach 1:
The guidance system is segmented into three independent linear guide tracks (first, second, and third tracks) arranged parallel to each other. Each track provides a specific degree of freedom, allowing the beam to move independently in different directions (vertical, horizontal perpendicular to belt, and horizontal parallel to belt). This segmentation enables complex 3D movement while keeping each individual guide mechanism relatively simple and modular.
Solution Approach 2:
The carriage acts as an intermediary component that connects the actuated support to the beam end. It receives control signals from the support system and translates them into precise beam positioning through its multi-axis guide tracks and rotation mechanisms. The carriage mediates between the actuation system and the beam, providing a structured interface for controlled movement while isolating the beam from direct mechanical constraints.
2Manufacturing precision
If independent adjustment systems with multiple motors are used at each end of the beam, then positioning precision and centering accuracy are improved, but the risk of mechanical failure and loss of control increases
Solution Approach 1:
The guidance system incorporates redundant mechanical constraints through its three parallel guide tracks. Even if one actuator or motor fails, the remaining tracks provide continued support and constraint for the beam, preventing catastrophic loss of positioning. The interlocking nature of the guide tracks creates a fail-safe mechanism where the beam remains constrained within the guide structure despite individual component failures.
Solution Approach 2:
The system allows for dynamic adjustment of positioning parameters through independent motor control of each guide track and rotation axis. By changing the operational parameters (position, orientation, speed) of individual actuators based on feedback from zinc thickness measuring devices, the system maintains precision while adapting to potential failures or variations in component performance.
3Productivity
If the wringing device is placed close to the liquid zinc bath, then the effectiveness of liquid zinc dewatering is improved, but the thermal expansion of the beam increases causing misalignment
Solution Approach 1:
The guidance system is designed to be dynamically adjustable, with each guide track and rotation axis capable of real-time position changes. This dynamic capability allows the system to compensate for thermal expansion of the beam by actively adjusting the positioning parameters through motorized actuation. The system transitions from a static structure to a dynamically adaptable framework that maintains alignment despite temperature-induced dimensional changes.
Solution Approach 2:
The positioning system incorporates feedback mechanisms through zinc thickness measuring devices located downstream that monitor the actual position and alignment of the wringing device. This feedback information is used to adjust the guide track positions and rotation angles, creating a closed-loop control system that automatically compensates for thermal expansion and maintains optimal alignment between the wringer and the moving web.
Data Source
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AI summary
The invention relates to a system for guiding a mobile carriage in a frame, wherein: the frame comprises three parallel linear-guiding tracks including a first track extending centrally on the frame and second and third tracks arranged laterally relative to the first track; the carriage has at least two rotation axles, a first axle driving at least a first wheel in the first guiding track and a second axle driving at least a second wheel and at least a third wheel, respectively, in the second and third guiding tracks; and the two rotation axles are perpendicular. The invention also relates to an associated method. A major aim of the invention is to enable the end of a mobile beam, such as a beam carrying a device for wiping a galvanising product off a steel strip, to perform a guided movement with a high degree of freedom while minimising mechanical stresses.