Orthotropic Deck Panel Cambering for Precise Rib Welding
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Solution Overview
Problem
Current methods for manufacturing orthotropic decks lack efficiency and consistency in producing strong and durable structures, particularly in the alignment and welding of rib members and deck plates, leading to suboptimal weld quality and residual stress.
Innovation Solution
A method involving the precise machining and cambering of rib members and deck plates, followed by the use of specialized fixtures and robotic welding to ensure accurate alignment and continuous welding, with laser tracking for customizing floor beam profiles to match the deck and rib configurations, thereby enhancing the fit and weld quality between components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional manufacturing methods are used for orthotropic decks, then the manufacturing process is simpler, but the weld quality and structural strength are suboptimal
Solution Approach 1:
The patent applies preliminary action by using specialized fixtures to pre-position and align rib members and deck plates before welding occurs. The fixtures establish precise geometric relationships and camber profiles in advance, ensuring that components are perfectly aligned prior to the welding process, thereby achieving high alignment precision without requiring complex post-weld adjustments.
2Reliability
If traditional welding methods are used, then the welding process is faster, but residual stress and weld quality are poor
Solution Approach 1:
The patent implements continuity of useful action through automated welding systems that perform continuous welding operations on orthotropic deck components. The robotic welders maintain consistent welding parameters and continuous motion along joint lines, eliminating interruptions and ensuring uniform weld quality throughout the entire structure, thereby achieving both high reliability and maintained productivity.
3Manufacturing precision
If manual alignment methods are used, then the equipment required is simpler, but the alignment accuracy and fit between components are insufficient
Solution Approach 1:
The patent replaces manual mechanical alignment methods with automated positioning systems and specialized fixtures that use precision mechanical guides and computer-controlled mechanisms. The system substitutes human-operated alignment tools with automated devices that can achieve sub-millimeter alignment accuracy through programmed motions and pre-configured fixture geometries, significantly improving alignment accuracy while reducing manual labor.
4Manufacturing precision
If custom floor beam profiles are created to match deck and rib configurations, then the fit and weld quality improve, but the manufacturing time increases
Solution Approach 1:
The patent applies preliminary action by creating custom floor beam profiles in advance through laser tracking and 3D scanning of the actual deck and rib configurations. The custom profiles are designed and fabricated before final assembly, allowing precise fitting to be achieved without time-consuming on-site adjustments. This pre-planning approach ensures optimal fit quality while minimizing manufacturing cycle time during the actual assembly process.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach results in improved weld quality, reduced residual stress, and increased strength and durability of orthotropic decks by ensuring precise alignment and continuous welding, leading to more efficient and robust structural components.
Implementation Method 1
the profile of the rib member and the deck plate is created using laser tracking
Data Source
AI summary
A method of manufacturing an orthotropic deck panel includes cambering a deck plate of the orthotropic deck panel to a first degree of camber in a longitudinal direction, cambering the deck plate to a second degree of camber in a transverse direction, and attaching a rib member of the orthotropic deck panel to the deck plate by welding the rib member to the deck plate. The first degree of camber corresponds to a shape of a surface of which the orthotropic deck panel is a part, and the second degree of camber is configured such that the deck plate is flatter in the transverse direction after the rib member is welded to the deck plate than when the deck plate is being cambered in the transverse direction.