Bicycles, E-Bikes & Micromobility calculator

Frame Weld Yield Calculator

Frame weld yield shows how many welded frames, cargo bike chassis, scooter decks, or subassemblies pass inspection without weld rework or scrap. Frame builders and quality engineers use it to monitor fixture setup, tube fit-up, weld parameter control, heat distortion, and operator training before defects reach paint or final assembly.

What this calculator does

  • Calculate accepted bicycle, e-bike, or scooter frame welds against inspected frame weldments, with a target yield for fabrication quality review.
  • a bicycle, e-bike, or scooter frame line needs to compare passed welded frames with total inspected weldments for a model, shift, or lot
  • Returns the percentage of inspected frame weldments that pass without weld rework or scrap.

Formula used

  • Frame weld yield = accepted welded frames ÷ inspected frame weldments × 100
  • Weld yield gap to target = frame weld yield - target weld first-pass yield

Inputs explained

  • Accepted welded frames: Use frames, swingarms, forks, scooter decks, or cargo chassis that pass weld inspection without rework.
  • Inspected frame weldments: Use all welded assemblies inspected for the same model, lot, shift, or supplier batch.
  • Target weld first-pass yield: Use the internal quality target for the frame family, material, welding process, and inspection plan.

How to use the result

  • Use it for fabrication cell reviews, supplier scorecards, fixture validation, paint queue planning, and rework staffing.
  • It does not measure fatigue strength, alignment, or geometry by itself; use it with inspection standards, destructive tests, and frame alignment data.

Common questions

  • Should frames repaired in the same shift count as accepted? For first-pass yield, count only frames that pass without rework. Track repaired frames separately as rework recovery.
  • Can I use this for aluminum and steel frames? Yes, but compare results within similar material, weld process, and inspection requirements.
  • Should cosmetic weld defects count? Count any defect that fails the defined weld or cosmetic acceptance criteria for that frame program.
  • How can I use the result? Use it to prioritize fixture corrections, welding parameter reviews, supplier containment, or extra inspection before paint.

Last reviewed 2026-05-12.