Cab Frame Segmentation for Electrodeposition Immersion
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Solution Overview
Problem
The existing coating methods for large-sized construction machine cab frames, which require division into multiple parts for immersion in an electrodeposition bath, result in increased man-hours and decreased productivity due to the need for separate coating of each part.
Innovation Solution
A cab frame design featuring a main structure with an opening and a substructure that can be connected to cover the opening, allowing the substructure to be housed within the main structure for immersion in a coating bath, reducing the overall diameter and enabling efficient coating without increasing man-hours.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cab frame is divided into multiple parts for coating, then the coating process can be completed, but the man-hour increases and productivity decreases
Solution Approach 1:
The cab frame is divided into a main structure and a sub structure that can be separably connected. The sub structure can be disconnected from the main structure, allowing the main structure to be fully immersed in the electrodeposition bath for coating without requiring separate handling of multiple fragmented parts, thus maintaining productivity while achieving complete coating coverage.
Solution Approach 2:
The connection between the main structure and sub structure is made dynamic and adjustable. The sub structure can be connected or disconnected from the main structure depending on the operational phase - disconnected during coating to allow full immersion, and connected during assembly to form the complete cab frame, providing flexibility to optimize both coating quality and productivity.
2Reliability
If the sub structure is connected to the main structure in the normal state, then the cab frame functions properly, but the outside diameter increases preventing full immersion in coating bath
Solution Approach 1:
The cab frame structure is designed with dynamic connectivity - the sub structure can be connected to or disconnected from the main structure. During coating operations, the sub structure is disconnected to reduce the outside diameter and enable full immersion in the coating bath. During normal operation, the sub structure is connected to restore the complete functional cab frame structure.
Solution Approach 2:
The sub structure is designed to be housed within or attached to the main structure. When connected, the sub structure integrates with the main structure to form the complete cab frame. The separable connection allows the sub structure to be positioned inside or alongside the main structure during coating, reducing the overall outside diameter to fit within the coating bath.
3Productivity
If the connectors are provided for separable connection, then the sub structure can be disconnected for coating, but the structure complexity increases
Solution Approach 1:
The connection system is segmented into discrete connectors that are integrated into the main structure and sub structure. These connectors provide standardized, modular connection points that simplify the separable connection mechanism. The segmentation allows for easy attachment and detachment without requiring complex coupling mechanisms, thereby reducing overall structural complexity while enabling efficient coating operations.
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 design allows for reliable immersion of the cab frame in a coating bath, improving productivity by reducing the outside diameter and enabling compact handling and transportation, while maintaining structural rigidity and protecting connectors.
Implementation Method 1
a typical coating method for the cab frame is cationic coating according to which the cab frame is immersed in an electrodeposition bath with a material for cationic electrodeposition coating
Data Source
AI summary
A cab frame includes: a main structure having an opening on a part of an outer surface thereof; a rear structure separably connected to the main structure to cover the opening while projecting from the main structure; and first and second connectors provided to the main structure and the rear structure, respectively, the first and second connectors connected to each other in an abutted manner when the main structure and the rear structure are connected to each other. When the rear structure is connected to the main structure after being turned back to front relative to the main structure, the rear structure is temporarily fixable to the main structure via the first and second connectors. When the rear structure is turned back to front and connected to the main structure, the rear structure is housed in the main structure.