Insert Welding Assembly With Decoupling Area for Multi-Material Joints
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Solution Overview
Problem
Existing methods for assembling multi-material components, such as steel, aluminum, and composite materials, face challenges in achieving robust, economical, and durable connections, particularly when using electric resistance welding, which is complex for mixed materials and results in high material costs and weight increase due to large welding patches.
Innovation Solution
A method involving an insert with a head and body for electric resistance welding, where a decoupling area is formed around the end portion to limit heat transmission, allowing for robust multi-material assemblies with reduced material costs using existing resistance welding equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If welding patches are used to enable multi-material assembly by electric resistance welding, then multi-material assemblies can be achieved, but the dimensions (particularly diameter) of welding patches become large, increasing material cost and mass
Solution Approach 1:
The invention divides the welding system into two functional parts: a small insert integrated into the first part that provides electrical contact, and a separate welding electrode that applies welding current. This segmentation allows the welding function to be achieved without requiring large welding patches on the first part, thereby reducing material cost and mass while maintaining multi-material assembly capability
Solution Approach 2:
The insert acts as an intermediary element between the welding electrode and the first part. It provides a localized conductive path for welding current without requiring the first part itself to have large welding patches. This intermediary approach enables welding of multi-material assemblies while keeping the first part lightweight and cost-effective
2Adaptability or versatility
If large diameter holes are arranged in the first part to integrate welding patches, then welding patches can be integrated, but the part receiving the welding patches becomes weakened
Solution Approach 1:
The welding function is segmented from the main structure of the first part. Instead of integrating large welding patches directly into the first part (which would require large holes and weaken the structure), the welding function is moved to a separate insert that can be integrated with minimal structural impact
Solution Approach 2:
The insert provides localized conductivity and welding capability at a specific point, while the rest of the first part maintains its original structural integrity. This local quality approach allows welding functionality to be added without compromising the overall strength of the first part
3Productivity
If welding is performed directly on the first part, then assembly can be achieved, but heat transmission alters or melts the material of the first part
Solution Approach 1:
The insert serves as a thermal intermediary that isolates the first part from direct heat exposure during welding. The welding current passes through the insert rather than the first part, generating heat localized at the insert-welding electrode interface. This protects the first part's material from thermal damage while maintaining assembly efficiency
Solution Approach 2:
The welding heat generation function is extracted from the first part and relocated to the insert. By taking out the heat-generating welding process from the first part's material, the invention prevents heat transmission damage while maintaining the productivity benefits of electric resistance welding
4Manufacturing precision
If vision positioning systems are added to welding robotic arms for precise electrode docking, then welding accuracy improves, but device complexity increases
Solution Approach 1:
The insert is pre-integrated into the first part with precise positioning features before the welding operation. This preliminary action establishes the correct position for electrode docking without requiring complex vision systems during the welding process itself. The positioning is done in advance during insert integration, simplifying the overall welding system
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
The method enables efficient, cost-effective, and robust multi-material assemblies by reducing heat transmission to sensitive materials like plastics, enhancing weld quality, and minimizing material waste, thus addressing the limitations of traditional welding techniques.
Implementation Method 1
Fastening the end portion of the body of the insert to the second part by electric resistance welding
Implementation Method 2
a decoupling area is formed around the end portion to limit heat transmission
Data Source
AI summary
A method enables the assembly of a first part and of a second part via an insert including a head intended to bear on the first part and a body including an end portion intended to be welded to the second part. The method includes, before fastening of the end portion of the body of the insert on the second part, a step of conforming the first or the second part so as to form a decoupling area around this end portion.