Brackets and mounts
Sheet Metal Open-Front Box – Flat Pattern
- Bounding box
- 500.0 × 722.4 × 1.5 mm
- Engine
- Precision B-rep
- Parameters
- 16
- Published
- November 2, 2026
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The prompt
Design a sheet metal enclosure (flat pattern with bends), made from 1.5mm thick mild steel, functioning as a rectangular open-front box. Overall outer dimensions when folded: 500mm wide x 250mm deep x 220mm tall. Construction: single flat sheet blank that folds into a 5-sided box (bottom, two sides, back, top), with the front face left open. On the front face opening, cut a rectangular window 480mm wide x 100mm tall, positioned 60mm from the top edge, centered horizontally, to hold a plastic lens panel. Add 4 mounting holes, 6mm diameter, one in each corner of the bottom panel, 20mm inset from each edge. Add 3 small holes, 5mm diameter, on the top panel near the back edge, spaced 30mm apart, for cable/connector mounting. Bend radius: 2mm on all fold lines. Add 5mm relief cuts at each bend corner to prevent tearing. Export as flat pattern (DXF) with bend lines marked, suitable for laser cutting and CNC press brake forming.
Parameters
| Name | Value | Range |
|---|---|---|
| Box Width (folded) | 500 mm | 100 – 1000 |
| Box Depth (folded) | 250 mm | 50 – 600 |
| Box Height (folded) | 220 mm | 50 – 500 |
| Sheet Thickness | 1.5 mm | 0.5 – 5 |
| Bend Radius | 2 mm | 0.5 – 10 |
| K-Factor | 0.44 | 0.25 – 0.5 |
| Relief Cut Length | 5 mm | 2 – 15 |
| Relief Cut Width | 3 mm | 1 – 6 |
| Lens Window Width | 480 mm | 50 – 900 |
| Lens Window Height | 100 mm | 20 – 400 |
| Window from Top Edge | 60 mm | 10 – 300 |
| Mounting Hole Dia | 6 mm | 3 – 12 |
| Mounting Hole Inset | 20 mm | 5 – 50 |
| Cable Hole Dia | 5 mm | 2 – 10 |
| Cable Hole Spacing | 30 mm | 10 – 100 |
| Cable Hole Inset from Back | 15 mm | 5 – 50 |
Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.
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