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Sheet Metal - Stretch Forming

Geometry or Cost Engine Changes that Could Impact Configured Digital Factories

The following changes might impact costing, even for Digital Factories that use earlier cost model versions.

  • Complex Hole properties: aPriori now computes various Complex Hole properties more accurately, including Perimeter and Area. In a large test set, fewer than 1% of parts were affected. For affected parts, fully burdened cost changed by less than 1%.

  • Form properties Depth Up and Depth Down (can impact machine selection and overhead costs): This release improves the accuracy of the values of the properties Depth Up and Depth Down for curved bend Form GCDs. As a result, in rare cases, machine selection may change compared to the previous release (since a feasible machine's shut height must be sufficiently large to accommodate the part's deepest form). If a different machine is selected, overhead cost and (to a lesser extent) cycle time may change.

    In a set of test parts, decreases in form depth were more common than increases. For the majority of test parts, form depth values changed by less than 20%, but a significant minority had changes of greater than 20%. However, in the test set, there was only minor impact on machine selection. In some cases, a smaller, less-expensive machine was chosen than in the previous release.

  • Chemical Milling and Edge GCDs: Previously, material removal by Chemical Milling sometimes resulted in Edge GCDs with Edge Type Chamfer, which triggered unnecessary operations. This chiefly affected for multi-step stamp forms with neighboring walls of different levels. In this release, such Edge GCDs have Edge Type Sharp. As a result, some times and costs may go down compared to the previous release.

Improvements to Prior Cost Model Versions

The following changes might impact costing for Digital Factories that use earlier cost model versions.

  • NO IMPACT

Cost Model Changes that Do Not Affect Configured Digital Factories

The following changes do not affect costings with Digital Factories that use earlier cost model versions. The changes are available only in the latest cost model version.

  • NO IMPACT