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Aerospace fixture program

400+ welding and inspection fixtures for two military aircraft.

Download the case studyPDF, 20 pages, 8.8 MB
Twin-station welding fixture.

HAL needed fixtures to weld and inspect the pipelines and sheet-metal structures of two aircraft. We designed them, took each one through HAL’s approval, and built the automation that made the volume possible.

Client
HAL, through its tooling vendor
Aircraft
LCA Mk1A and HTT-40

One tool to weld and inspect

It holds every tube and bracket in place for welding, then checks the finished part to 0.05 mm.

  1. 1Part being welded
  2. 2End-fitting mandrel
  3. 3Locking pin
  4. 4Cradle support
  5. 5Location plate
  6. 6Base plate
  7. 7Lifting eye bolt

A library that does the repetitive work

Four hundred fixtures were too many to draw by hand. iLogic rules place, size and drill library parts along the pipe, then fill in the drawings.

A fixture built from library parts.

A fixture built from library parts.

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R&D to keep production on track

Hand-cut channel bases warped and their holes drifted. A laser tube cutter, a pinned guide and laser welding kept them precise.

On a channel base.

On a channel base.

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Machined from the model

Plates, locators and mandrels machined straight from the model and set with CMM, so parts drop in and lift out cleanly after welding.

Channel cut on the tube laser.

Channel cut on the tube laser.

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