Rail Vehicle Body with Variable Sheet Metal Thickness
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Solution Overview
Problem
Existing rail vehicle body designs require excessive material and weight due to uniform sheet metal thickness across all areas, including less stressed regions, which is inefficient in meeting load capacity requirements.
Innovation Solution
A rail vehicle body design featuring sheet metal elements with varying thicknesses, where thinner sheet metal parts are used in less stressed areas and thicker parts in stressed areas, connected via weld seams or soldered seams to form a stable and lightweight structure, allowing for efficient load distribution without additional reinforcements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If uniform sheet metal thickness is used across all areas, then manufacturing simplicity is maintained, but material weight and requirements increase excessively
Solution Approach 1:
The patent applies local quality by varying the sheet metal thickness according to the local stress requirements of different car body areas. Thinner sheet metal (first thickness) is used in less stressed areas, while thicker sheet metal (second thickness) is used in highly stressed areas, optimizing both weight and structural integrity without compromising manufacturing feasibility.
2Strength
If thicker sheet metal is used throughout, then load capacity requirements are met, but material weight and costs increase
Solution Approach 1:
The patent implements local quality by strategically placing thicker sheet metal only in areas with high stress concentrations (such as around window openings, door openings, and highly loaded structural regions), while using thinner sheet metal in areas with lower stress demands, thereby achieving adequate load capacity with minimized weight.
Solution Approach 2:
The patent segments the sheet metal structure into multiple zones with different thicknesses, dividing the car body outer shell into first sheet metal parts (thinner) and second sheet metal parts (thicker) based on their respective load-bearing requirements, allowing optimized material distribution.
3Weight of moving object
If variable thickness sheet metal is used, then material weight is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent segments the sheet metal into distinct first and second parts with different thicknesses, where each segment can be manufactured separately and then joined together, simplifying the manufacturing process compared to creating a single complex variable-thickness component.
Solution Approach 2:
The patent combines separately manufactured first and second sheet metal parts through joining techniques (such as welding, riveting, or adhesive bonding) to create the final car body structure, allowing each part to be optimized and manufactured independently before assembly.
4Strength
If additional reinforcements are added to stressed areas, then load capacity is improved, but device complexity and material requirements increase
Solution Approach 1:
The patent applies local quality by varying the sheet metal thickness itself to provide the necessary reinforcement in stressed areas, eliminating the need for additional separate reinforcement components such as ribs, beams, or brackets, thereby reducing structural complexity while maintaining adequate load capacity.
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 reduces material and weight while maintaining structural integrity by strategically placing thicker sheet metal in high-stress areas, ensuring a stable car body with reduced overall weight and minimizing corrosion issues from different materials.
Implementation Method 1
The front ends of the first sheet metal part and the second sheet metal part are connected to one another via a weld seam or soldered seam, so that a firm bond is produced between the first and the second sheet metal part
Implementation Method 2
The front ends of the first sheet metal part and the second sheet metal part are connected to one another via a weld seam or soldered seam, so that a firm bond is produced between the first and the second sheet metal part
Data Source
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AI summary
The body has a sheet metal element (3, 5) including a set of sheet metal parts (13b, 14) with sheet thicknesses, where one of the sheet thicknesses is smaller than another sheet thickness. The sheet metal parts include front-side ends, which is extended over the thickness of the sheet metal parts and transverse to a large scale sheet metal surface of the sheet metal parts. The front-side ends of the sheet metal parts are connected with each other over a welded or soldered joint so that the sheet metal parts are firm connected with each other. An independent claim is also included for a method for producing a rail vehicle-carriage body.