Sheet Metal Enclosure Design in SolidWorks: Bend Allowances, K-Factors & Flat Patterns

September 08, 2026 - BY Admin

Sheet Metal Enclosure Design in SolidWorks: Bend Allowances, K-Factors & Flat Patterns

Precision Sheet Metal Forming from Digital CAD to CNC Brakes

Sheet metal parts must unfold into clean, flat cut sheets before being bent on CNC press brakes. Setting the wrong K-Factor in your CAD software causes dimensional errors on the shop floor.

Understanding the Physics of Sheet Bending

Designing sheet metal enclosures requires balancing bend geometry with real-world material stretching.

Neutral Axis & K-Factor: Accurately calculating the ratio of material compression on the inside to tension on the outside.
Corner Relief Notching: Preventing sheet tearing at corners where two bends intersect.
Punch Tool Clearances: Keeping pierced holes at least twice the sheet thickness away from bend lines to avoid oval distortion.

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