This hard vacuum helium leak detection system with special purpose tooling is designed and built for leak testing electrical box subassemblies used in electric vehicles (EVs), explained by Alex Garner, VES UK Sales Manger.
Designed with special purpose automated tooling built to be able to clamp down and seal the casing whilst being leak tested at 1.17 e-4 mbarl/sec @ 4 bar, with a 50-second hold test to ensure airtight integrity.
A prototype of the tooling was produced to determine and validate that the proposed system will perform all of its intended functionality.
Three tonnes of downward pressure creates the seal required to leak test the circuit. So the casing will not rise from the sealing surface.
There are three pneumatic cylinders providing the necessary force onto the plate and pin fixtures that feed through the vacuum chamber wall.
The pins are designed with springs incorporated into them and are positioned to fit precisely into position within the casing, thus onto the LPU seal.
Additional tooling connects and seals the casing, which allows the helium trace gas to penetrate and leak test the electrical sub assembly box casing.
Locking mechanisms are integrated into the design to prevent the casing being damaged when being leak tested, along with operational safety being paramount.
For assistance with our safe, reliable and efficient leak detection systems with customer specific special purpose tooling, please contact our sales engineers by email at sales@vac-eng.com.