TDC Duct Corner Punching Line

The line starts with a mechanically expanded passive decoiler paired with a motor-driven straightener (1.5 kW), feeding leveled strip directly into the press. This eliminates the need for pre-cut sheets, reduces material waste from shearing, and keeps the punching station running without operator intervention between loads.

The BRF-2010NS roller feeder connects to the punch press by draw bar, locking its feed cycle to each press stroke. With ±0.2 mm feeding accuracy and support for material up to 3.5 mm thick, the feeder ensures every blank enters the die in the correct position — critical for TDC flange corners that must mate cleanly during duct assembly.

The JD21-80A press provides 800kN of nominal force within a 9 mm working stroke, sufficient to punch and form corners from steel coil up to 2.0 mm. A 100 mm die height adjustment and 320 mm maximum die set height accommodate various corner profiles without press modification. At 5,200 kg, the press frame absorbs impact forces with minimal deflection.

Each station — decoiler, feeder, and press — is a discrete module connected in line. Factories can position the decoiler based on crane access for coil loading, route the strip through the feeder, and locate the press near downstream duct forming equipment. Standard 380V ±10% power and ≥0.5 MPa air supply match typical plant infrastructure.

Rated at 45 pieces per minute, the line is designed for multi-shift production environments. Seven straightening rollers remove coil set memory before blanking, and heavy-duty feed rollers (60 mm and 80 mm diameter) resist wear over long runs. NTBOBO supplies 300+ die sets and has installed 700+ machines worldwide, ensuring tooling availability and field-tested reliability.