Railway Wall Module With Integrated Stiffening Elements
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for manufacturing car body components for rail vehicles, such as side walls, end walls, and roofs, involve complex and time-consuming processes due to the need for numerous welded joints and additional longitudinal profiles, leading to productivity issues, dimensional inaccuracies, and increased thermal influence, which complicates the use of modern thermal joining processes.
Innovation Solution
A wall module design featuring external sheeting with integrated stiffening elements and skeleton beams arranged at specific distances, allowing for self-positioning and temporary self-fixing during thermal joining, reducing the need for additional longitudinal profiles and enabling the use of modern thermal joining processes like laser welding, while optimizing material utilization and reducing production time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If fan-like skeletons with numerous longitudinal profiles and skeleton beams are used, then the rigidity and structural integrity of car body components are improved, but the number of welded joints increases significantly, leading to increased production time and reduced productivity
Solution Approach 1:
The invention divides the car body component into modular wall modules, each comprising a skeleton support with integrated outer sheeting and stiffening elements. This segmentation reduces the overall number of joints required while maintaining structural integrity through self-contained modules that can be manufactured and assembled independently.
Solution Approach 2:
The invention merges the outer sheeting and stiffening elements directly onto the skeleton support in a single integrated structure. This combining eliminates the need for separate longitudinal profiles and reduces the number of welded joints by integrating multiple structural functions into one unified component.
2Stability of the object's composition
If numerous welded joints are used to assemble skeleton and outer sheeting, then the structural stability is improved, but thermal shrinkage causes significant tolerance deviations and buckling, requiring additional technical effort to control
Solution Approach 1:
The outer sheeting with stiffening elements is pre-assembled and pre-stiffened onto the skeleton support before final component assembly. This preliminary action allows the structure to achieve its intended geometry and stiffness early in the manufacturing process, minimizing subsequent thermal distortion and tolerance deviations during welding operations.
Solution Approach 2:
The invention converts the potentially harmful thermal effects of welding into a beneficial process by carefully sequencing operations. The outer sheeting is first pre-stiffened in a cold state to establish precise geometry, then thermal joining is performed in a controlled manner that leverages the already-established structural framework to minimize distortion.
3Productivity
If modern thermal joining processes like laser welding are used, then productivity and automation potential are improved, but complex programming and constant repositioning are required due to the fan-like skeleton design
Solution Approach 1:
The invention extracts and removes the complex fan-like skeleton structure with its numerous longitudinal profiles, retaining only the essential skeleton support with integrated stiffening elements. This extraction simplifies the geometry to basic shapes that are much easier to program and execute with automated thermal joining processes, eliminating the need for constant repositioning and complex programming.
4Strength
If different sheet metal thicknesses or strength properties are used for outer sheeting, then the required component rigidity and stress distribution are improved, but the manufacturing complexity and cost increase
Solution Approach 1:
The stiffening elements are strategically positioned at specific locations on the skeleton support where local stress concentrations occur. This local reinforcement approach allows the use of uniform sheet metal thickness throughout the outer sheeting while achieving the required stress distribution and rigidity only where needed, rather than requiring different thicknesses or material properties across the entire component.
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 enhances dimensional accuracy, reduces material thickness, minimizes interruptions during the joining process, and allows for high automation and efficient corrosion protection, resulting in cost-effective and efficient production of car body components with improved structural integrity and reduced weight.
Implementation Method 1
thermal joining processes
Implementation Method 2
self-positioning and temporary self-fixing
Data Source
Figure 1~2
Figure 3A~5
Figure 6
AI summary
Summary: The invention relates to a wall module and a method for manufacturing (production, pre-assembly, and final assembly) components (side wall, end wall, roof) with wall modules for the body-in-white of rail vehicle bodies in differential construction, with reduced manufacturing effort, improved dimensional accuracy, comparable structural stiffness for the outer cladding with reduced sheet thickness, and improved flatness of the outer surfaces of the components. According to the invention, the improved properties compared to known methods for designing and manufacturing the aforementioned components are achieved by a wall module 1 with outer cladding incorporating integrated or integral stiffening elements 3 arranged at specific intervals depending on the local stresses, and by a framework,which essentially consists only of ribbed supports 4 arranged at specific intervals depending on the local stresses and essentially manages without additional longitudinal profiles for stiffening the outer cladding, is achieved through the manufacture, pre-assembly and final assembly of the wall modules with simple positioning and joining devices with low manufacturing time expenditure by means of self-positioning and temporary self-fixation for the thermal joining process, through low tolerance deviations in dimensional accuracy and flatness by means of reduced thermal influence and through a design for the optimal use of modern thermal joining processes and modern cold forming processes for the production of the wall modules and through the possible high degree of automation of the entire manufacturing process of the wall modules resulting from the overall system of all properties of the invention.