Very sophisticated problem. Solution is simple and uses a standard process: - GD&T or ISO GPS of single part from design engineer must use function based datums (= contacts touch or fit against rigid partners). - Derived verification specification must take into account the measurement error and should introduce "verification contacts". - Derived manufactured part specification must introduce manufacturing contacts and manufacturing targets for features that control fit. For castings, datums cannot be used! The contact partner is rigid (casting mould), but the hot metal itself is not rigid! Please see: The function based datums are never replaced, they are not deleted!
Such an interesting video! cheers mate!
Very sophisticated problem. Solution is simple and uses a standard process:
- GD&T or ISO GPS of single part from design engineer must use function based datums (= contacts touch or fit against rigid partners).
- Derived verification specification must take into account the measurement error and should introduce "verification contacts".
- Derived manufactured part specification must introduce manufacturing contacts and manufacturing targets for features that control fit. For castings, datums cannot be used! The contact partner is rigid (casting mould), but the hot metal itself is not rigid!
Please see: The function based datums are never replaced, they are not deleted!