ODM Sheet Metal Bending Manufacturers & Factories

Under controlled CNC air bending with laser angle tracking, we routinely achieve angular tolerances of ±0.2° to ±0.5° across mild steels, aluminum, and stainless alloys. Linear flange tolerances and hole-to-bend center distances are held between ±0.05 mm and ±0.15 mm depending on material thickness, bend sequence, and gauge variations. For mission-critical geometries requiring tighter tolerances, CNC post-machining or precision re-strike tooling is deployed.

Springback is directly proportional to material yield strength and inversely proportional to elastic modulus. We resolve springback variations through a triple-tier protocol: First, advanced DFM simulation calculates the expected angular rebound based on heat-lot yield variations. Second, our CNC hydraulic press brakes employ mechanical and optical feedback systems to slightly over-bend the sheet beyond the target nominal angle. Third, when dealing with tough work-hardening alloys like full-hard stainless steel or Grade 5 titanium, specialized bottoming dies, coined radii, or localized heating are applied to set the corner permanently.

Yes. Founded in Shenzhen in 2016, Sunmy operates integrated in-house CNC milling (up to 5-axis), Swiss-type lathe turning, automated PEM hardware insertion (PEM clinch nuts, studs, standoffs), TIG/MIG welding, robotic laser welding, and cleanroom mechanical assembly. This unified capacity eliminates the dimensional stack-up errors and extended timelines caused by moving half-finished parts between disjointed subcontracted suppliers.

As a robust rule of thumb: Ductile aluminum alloys such as 5052-H32 can comfortably accept an inside bend radius equal to 1.0× material thickness (t). For harder heat-treated structural grades such as 6061-T6, we mandate a minimum radius of 1.5× to 2.5× t and strictly align the bend line perpendicular or 45° to the rolling grain to prevent exterior micro-cracking. Austenitic stainless steel (304/316) behaves well at 1.0× to 1.5× t, provided adequate press tonnage is maintained.

We adhere to strict confidentiality workflows. We enter into bilateral Non-Disclosure Agreements (NDAs) prior to clients sending 2D drawings or 3D STEP models. Engineering documentation is stored on air-gapped, encrypted on-premise servers with role-based access restrictions. Overseas buyers communicate directly with our engineering and manufacturing facility—not third-party trading entities—guaranteeing that design schematics are never distributed across unregulated vendor bidding networks.