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Tolerance stack-up analysis determines cumulative effect of individual component tolerances on final assembly. Critical for assembly success.
ସୂତ୍ର
Statistical method: total = √(sum of squares) — more realistic
ଷ୍ଟେପ୍-ଷ୍ଟେପ୍ ଗାଇଡ୍ |
- 1Linear stack: total tolerance = sum of individual tolerances (worst case)
- 2Statistical method: total = √(sum of squares) — more realistic
- 3Design tolerances to achieve assembly fit requirements
ସମାଧାନ ହୋଇଥିବା ଉଦାହରଣ
ଇନପୁଟ୍
Four parts each ±0.5mm, total stack tolerance requirement ±1.5mm
ଫଳ
Worst case stack = 2.0mm (exceeds), statistical = 1.0mm (passes)
Statistical justified
ଏଡ଼ାଇବା ଯୋଗ୍ୟ ସାଧାରଣ ଭୁଲ
- ✕Adding worst-case tolerances without justification
- ✕Ignoring correlation between tolerances
ବାରମ୍ବାର ଜିଜ୍ଞାସା
When to use worst case vs. statistical?
Worst case for critical assemblies; statistical for high-volume production where cost matters.
How do you reduce stack tolerance?
Use fewer parts, use larger dimensions, or reduce individual component tolerances.
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