Every precision sheet metal enclosure passes through a controlled, nine-step manufacturing flow. Understanding this process helps you evaluate suppliers, anticipate lead times and communicate more precisely with your manufacturer. Here is how SanJun Hardware takes a metal enclosure from concept to finished product.
Step 1 — Design & DFM
Every project starts with free CAD and design-for-manufacturability (DFM) review. Engineers check material thickness, bend radii, hole-to-edge distances and tolerance stack-ups, catching costly mistakes before any metal is cut.
Step 2 — Laser Cutting
Programmed flat patterns are cut on fiber laser machines for high precision, clean edges and tight tolerances. Laser cutting supports complex profiles, ventilation slots and perforation patterns that conventional tooling cannot achieve.
Step 3 — Precision Bending
CNC press brakes form the cut blanks along programmed bend lines. Consistent bend angles and radii are critical — they determine how well panels fit together in later assembly.
Step 4 — Forming
Beyond simple bends, forming adds three-dimensional features such as louvered vents, embossed stiffening ribs, countersinks and drawn features that give a panel its strength and function.
Step 5 — Welding
Enclosures are joined by TIG, MIG or laser welding depending on material and seam requirements. Skilled welders and jigs ensure square corners, minimal distortion and structural integrity — the foundation of a durable cabinet.
Step 6 — Grinding & Deburring
Welds are ground smooth and sharp edges are deburred to remove burrs and splatter. This step is essential for both operator safety and the final surface finish.
Step 7 — Riveting
Hardware such as studs, standoffs, hinges and clinch fasteners are pressed or riveted into place, creating strong, reusable mounting points without damaging the metal.
Step 8 — Electrostatic Powder Coating
Panels are pre-treated, then coated with electrostatic powder and cured in an oven. Powder coating produces a uniform, durable, corrosion-resistant finish in a wide range of colors and textures.
Step 9 — Assembly & Quality Control
Finally, components are assembled, and every unit undergoes dimensional inspection and functional checks against drawings and specifications before packaging and shipment.
Need an enclosure built? Send your drawings for a free CAD & DFM review and a quote within 24 hours.