Frame Member Rib for EMI Shielded Panel Welding
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Solution Overview
Problem
Existing methods for constructing electromagnetic interference (EMI) shielded panels face challenges in achieving a robust and continuous EMI seal due to heat damage from welding processes, which slows down production and can result in defects.
Innovation Solution
The use of a peripheral frame assembly with a sacrificial rib for welding the skin member to the frame member, forming a continuous EMI seal before core and second skin member assembly, and employing steel bars as clamps and heat sinks to manage heat during welding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If welding is used to join skin members to frame members, then a continuous EMI seal is achieved, but heat damage occurs to the bonding and production speed decreases
Solution Approach 1:
The skin member is positioned and temporarily secured to the frame member before welding occurs. This preliminary positioning ensures proper alignment and protects bonding areas from heat damage during the welding process, allowing for continuous EMI sealing without compromising production speed
Solution Approach 2:
A sacrificial rib is introduced as an intermediary element between the skin member and frame member. The rib serves as a heat sink during welding, absorbing excess heat and preventing it from damaging the bonding between the skin member and frame member, thus maintaining both seal integrity and production efficiency
2Reliability
If welding is used to join skin members to frame members, then a continuous EMI seal is achieved, but heat damage occurs to the bonding
Solution Approach 1:
The sacrificial rib acts as a thermal intermediary during welding, positioned between the heat source and the bonding interface. It absorbs and dissipates welding heat, preventing thermal damage to the adhesive bonding while still allowing the weld to create a continuous EMI seal
Solution Approach 2:
The bonding between skin member and frame member is established or protected before welding occurs. This preliminary bonding is then protected from heat damage by the sacrificial rib, ensuring that the final assembly maintains both strong bonding and continuous EMI sealing
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 method provides a durable, highly conductive metal-to-metal joint with a robust EMI shielding capability, eliminating the need for secondary sealing processes and preventing bonding damage from heat, thus enhancing production efficiency and seal integrity.
Implementation Method 1
employing steel bars as clamps and heat sinks to manage heat during welding
Implementation Method 2
the edge of the first skin member is located in the second recess of the first side wall of the frame member and is adapted to be welded to the rib and thereby to the first side wall of the frame member
Data Source
AI summary
An electromagnetic interference shielded panel and method of manufacture. The panel includes one or more frame members having a rib adapted to provide sacrificial material when a first skin member is welded to the frame member. The first skin member is welded to the frame members of a frame assembly prior to bonding of a core member and a second skin member to the first skin member and frame assembly.