Criteria for establishing datums in manufactured parts

A Hull Normal Based Approach for Cylindrical Size Assessment

“…In an analysis unrelated to size, Zhang and Roy [9] worked to formalize the definition of data based on features of size. In the case of cylindrical datum features, the minimum circumscribing cylinder (MCC) was utilized as the appropdate definition of a cylinddcal data cluster.…”

A Hull Normal Based Approach for Cylindrical Size Assessment

“…In an analysis unrelated to size, Zhang and Roy [9] worked to formalize the definition of data based on features of size. In the case of cylindrical datum features, the minimum circumscribing cylinder (MCC) was utilized as the appropdate definition of a cylinddcal data cluster.…”

The accuracy aspect in set-up determination for sheet bending

“…This is indicated by the triangle that replaces one of the arrow-heads of the dimension line. The expression "reference face" is used here instead of "datum face", since a face does not usually serve as datum, but only serves as a reference to define a datum plane [15].…”

Tolerancing and Sheet Bending in Small Batch Part Manufacturing

“…A reference face and a toleranced face are defined for each conventional tolerance. The expression 'reference face' is used here instead of 'datum face', since a face doesn't usually serve as datum, but only serves as a reference to define a datum plane [25]. Figure 2a shows tolerances between flat pattern form features (such as holes, notches, side faces) and a 'main' face.…”

A Hull Normal Based Approach for Cylindrical Size Assessment

“…In an analysis unrelated to size, Zhang and Roy [9] worked to formalize the definition of data based on features of size. In the case of cylindrical datum features, the minimum circumscribing cylinder (MCC) was utilized as the appropdate definition of a cylinddcal data cluster.…”

The accuracy aspect in set-up determination for sheet bending

“…This is indicated by the triangle that replaces one of the arrow-heads of the dimension line. The expression "reference face" is used here instead of "datum face", since a face does not usually serve as datum, but only serves as a reference to define a datum plane [15].…”

Tolerancing and Sheet Bending in Small Batch Part Manufacturing

“…A reference face and a toleranced face are defined for each conventional tolerance. The expression 'reference face' is used here instead of 'datum face', since a face doesn't usually serve as datum, but only serves as a reference to define a datum plane [25]. Figure 2a shows tolerances between flat pattern form features (such as holes, notches, side faces) and a 'main' face.…”

A Hull Normal Based Approach for Cylindrical Size Assessment

“…In an analysis unrelated to size, Zhang and Roy [9] worked to formalize the definition of data based on features of size. In the case of cylindrical datum features, the minimum circumscribing cylinder (MCC) was utilized as the appropdate definition of a cylinddcal data cluster.…”

The accuracy aspect in set-up determination for sheet bending

“…This is indicated by the triangle that replaces one of the arrow-heads of the dimension line. The expression "reference face" is used here instead of "datum face", since a face does not usually serve as datum, but only serves as a reference to define a datum plane [15].…”

Tolerancing and Sheet Bending in Small Batch Part Manufacturing

“…A reference face and a toleranced face are defined for each conventional tolerance. The expression 'reference face' is used here instead of 'datum face', since a face doesn't usually serve as datum, but only serves as a reference to define a datum plane [25]. Figure 2a shows tolerances between flat pattern form features (such as holes, notches, side faces) and a 'main' face.…”