Describe the practice for representing a sheet metal part in a flat pattern using rectangular coordinate dimensioning without dimension lines and tabular dimensioning.
What will be an ideal response?
A common method for representing a sheet metal part is only the flat pattern using rectangular coordinate dimensioning without dimension lines and identify features with letters on the flat pattern. A table correlates with the letters on the flat pattern and specifies the dimensions of each labeled feature. The flat pattern dimensions take into consideration material bending so the final bent part is exactly as designed. For example, a flat pattern drawing of a sheet metal part dimensioned using rectangular coordinate dimensioning without dimension lines. In this example, the features are dimensioned in a table that correlates to letters on the flat pattern.
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