Vehicle Spot Weld Layout for Torsional Stiffness With Fewer Welds
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Solution Overview
Problem
The existing methods for spot welding in the automotive industry lack optimization in the spacing and number of spot welds, leading to inefficiencies in manufacturing cycle time and potential weaknesses in the structural integrity of vehicle bodies.
Innovation Solution
A method that iteratively determines optimal spot welds, generates clusters of these welds, calculates centroid distances, creates a spot weld model based on these distances, and then uses this model to guide the welding process, minimizing the number of spot welds while ensuring structural integrity and torsional stiffness constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the spacing and location of spot welds are determined based on experience and experimental tests, then the structural integrity of the vehicle body is maintained, but the manufacturing cycle time increases and productivity decreases
Solution Approach 1:
The patent replaces the mechanical trial-and-error approach of physical experimental tests with a computational optimization system that uses algorithms to determine optimal spot weld locations and spacing, thereby reducing manufacturing cycle time while maintaining structural integrity
Solution Approach 2:
The patent performs preliminary computational optimization analysis before the actual welding process to determine the optimal spot weld configuration, allowing the manufacturing process to proceed efficiently without requiring time-consuming physical tests during production
2Strength
If the number of spot welds is increased to improve structural integrity and torsional stiffness, then the strength of the vehicle body improves, but the manufacturing time and complexity increase
Solution Approach 1:
The patent uses optimization algorithms to determine the optimal parameters for spot weld location, spacing, and number, replacing the conventional approach of simply increasing weld count to improve strength, thereby achieving the required torsional stiffness with minimal welds
Solution Approach 2:
The patent applies different spot weld densities and configurations to different regions of the vehicle body based on local structural requirements, rather than using a uniform distribution, which reduces the total number of welds needed while maintaining overall structural integrity
3Ease of manufacture
If spot welds are distributed uniformly across the vehicle body, then the manufacturing process is simplified, but the structural efficiency and strength-to-weight ratio decrease
Solution Approach 1:
The patent employs asymmetric and non-uniform spot weld distribution patterns optimized for specific structural requirements, replacing simple uniform distribution, which improves structural efficiency while the optimization process itself simplifies the manufacturing planning
Data Source
AI summary
A method for welding components of a vehicle includes iteratively determining spot welds, generating a plurality of clusters of the spot welds, determining one or more centroid distances between the plurality of clusters, generating a spot weld model based on the one or more centroid distances, and welding the components of the vehicle based on the spot weld model.