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CS-014 · CASE STUDY

Assembly Fixture — Safety &
Ergonomics Improvement.

A critical OEM assembly station, re-engineered end-to-end. CAD, FEA, simulation and poka-yoke — applied where it matters: on the line.

CAD and fixture pocket simulation views for an automotive assembly fixture redesign
CAD · CAM · SIMULATIONREV. 03 — 2024
01 · PROBLEM

An OEM assembly station was bottlenecking a critical line — operator strain, long fixture changeovers, frequent downtime and the constant risk of wrong-part loading during suspended-engine handling.

02 · ENGINEERING SOLUTION

ATE redesigned the station around a new fixture architecture validated in CAD/CAM simulation, then added poka-yoke locating logic and an operator-friendly loading sequence before production release.

03 · RESULT

Changeover time down 42%. Line downtime down 31%. Operator safety up. Zero defect parts since deployment. The station now runs faster with less manual intervention and lower risk.

ENGINEERING EVIDENCE
Green and yellow CAM simulation views validating the revised fixture geometry
01 · VALIDATION

Simulation Validation

Toolpath and geometry studies used to validate the revised fixture profile before physical build.

Prototype white fixture model used to confirm locating surfaces and operator handling
02 · VALIDATION

Prototype Fixture Model

Prototype model used to verify locating points, surface contact and reach before release to fabrication.

OPERATOR PAIN POINT

Manual fixture swaps were slowing the line and increasing handling risk.

The earlier setup depended on the operator changing fixture logic depending on which engine variant was hanging overhead. That added delay, created avoidable cognitive load and increased the chance of mismatch during a live production cycle.

  1. 01
    Existing fixture strategy required manual interpretation by the operator.
  2. 02
    Variant-specific handling increased changeover time at the station.
  3. 03
    ATE reworked the locating logic to make the sequence clearer and safer.
  4. 04
    The updated fixture flow reduced downtime while improving repeatability.
Diagram showing the previous assembly fixture process with manual changeovers between BS3 and BS5 fixtures
Illustration of engine variant mismatch risk at the assembly station before the fixture redesign
BENEFITS DELIVERED
↓ 42%
Changeover Time
↓ 31%
Downtime
Poka-Yoke
Error-Proofed
↑ Ergo
Operator Safety
0 PPM
Defect Rate

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