Turret Press Material Cost and Utilization

Material Cost = ((Material Cost Per Mass * Part Mass) / Utilization) / Final Yield

aPriori calculates the cost for material based on the following factors:

• Material cost per mass (determined from Material Stock if stock is selected; otherwise, from Material Composition in the Material Selection dialog)

• Part mass (product of part volume and material density; see the Part Volume PSO and the Density property in the Materials table)

• Utilization (see formula below)

• Final Yield (see Yields)

Utilization = Part Mass *Number of Parts per Sheet / Stock Mass

Utilization depends on the following:

• Part mass (product of part volume and material density; see the Part Volume PSO and the Density property in the Materials table)

• Number of parts per sheet (see below)

• Stock mass (see formula below)

Number of Parts per Sheet

aPriori calculates this value by finding the maximum number of parts that can fit on a sheet of stock, with the parts oriented either lengthwise or widthwise. It takes into account the following measurements:

• Blank SER dimensions (see Width of the flat pattern’s Smallest Enclosing Rectangle and Length of the flat pattern’s Smallest Enclosing Rectangle)

• Part spacing. This is specified by the PSO Part Spacing for Rectangular Nesting. If the PSO is not supplied, the machine property Part Spacing is used. If the PSO is not supplied and the machine property is not present, the cost model variable rectangularPartSpacing is used.

• Sheet dimensions (see Stock Sheet Length and Stock Sheet Width)

• Sheet lengthwise margin (trim strip width specified by the machine property Sheet Length Trim Strip)

• Sheet widthwise margin (trim strip width specified by the machine property Sheet Width Trim Strip)

Stock Mass = Stock Length * Stock Width *
Stock Thickness * Material Density

Stock mass is the product of the following:

• Stock length (specified by the cost model variable defaultSheetLengthTurretPress, or the PSO Stock Sheet Length)

• Stock Width (specified by the cost model variable defaultSheetWidthTurretPress, or the PSO Stock Sheet Width)

• Stock thickness (specified by the PSO Thickness of Part)

• Material density (specified by the Density property in the Materials table)