01
Flat-data authority
Identify whether the supplier develops the flat from the formed model or receives approved flat data, and define which file controls conflicts.
Evidence route
Released model/drawing/flat revision and conflict hierarchy
Sheet-metal cutting engineering
Sheet-metal cutting: control the flat definition before the first edge is made.
Laser, punch, waterjet, plasma and shear routes create different edge, heat, feature and handling conditions. PartVerity aligns the controlled drawing, flat data, material, cutting route and inspection basis before a blank becomes production authority.
Decision premise
Cutting question: which released flat definition and process route can create every feature without losing revision, material or edge intent?
Engineering control
Six controls from flat data to a verified blank
A clean DXF is not proof of an approved flat pattern. Bend assumptions, revision status, material side, feature purpose and downstream forming still govern the accepted blank.
02
Cutting-route selection
Compare geometry, thickness, material, edge condition, heat sensitivity, quantity and secondary needs before selecting the process family.
Evidence route
Process basis, supplier capability response and exceptions
03
Feature and edge risk
Review small holes, narrow webs, corners, slots, tabs and lead-in locations against deformation, dross, taper, heat effect and burr risk.
Evidence route
Feature-risk map and controlled edge criteria
04
Material side and grain
Preserve rolling direction, protective film, cosmetic face and grain orientation where forming, appearance or function depends on them.
Evidence route
Nesting/orientation note and material-side identification
05
Datum and marking plan
Define which cut edges or features become forming references and how part, lot or orientation marks avoid functional and cosmetic zones.
Evidence route
Datum reference, marking method and prohibited areas
06
Blank verification
Match feature size, profile, hole position, edge condition and material identity to suitable checks before forming hides or changes them.
Evidence route
Blank inspection record, lot identity and disposition
Decision matrix
Cutting condition to control response
Process labels are not universal capability guarantees. Supplier equipment, material, thickness and acceptance method remain part-specific.
| Cutting condition | Route implication | Evidence focus |
|---|---|---|
| Dense precision profile | Laser, punch or specialist route reviewed against feature mix | Feature map, edge criteria and actual profile results |
| Heat-sensitive or thick stock | Thermal versus non-thermal cutting trade-off | Heat-affected edge, taper, cleanup and supplier declaration |
| Cosmetic protected sheet | Film, face, nesting and handling plan | Surface identity and pre-form visual status |
| Blank drives later bends | Datum edges/features protected and measured | Flat reference results and transfer plan |
| Multiple similar variants | Revision-safe nesting and identification | Program/file reference, part marking and segregation |
Claim boundaries
Cutting assumptions that need evidence
A DXF does not override the controlled formed-part drawing.
A burr-free claim is incomplete without an edge criterion and inspection method.
Machine capacity does not prove a feature-specific result.
A correct blank does not prove final formed dimensions.
Technical context
Use guidance to frame the review—not to replace project evidence.
External DFM context for cutting, material thickness, feature relationships and edge considerations. Numeric capabilities remain supplier- and project-specific.
Protolabs sheet-metal design guidelines