Fire Damper Frame Roll Forming Line

1. Definition

A fire / smoke damper frame roll forming line (also called VCD frame line) forms the casing / frame members for HVAC dampers. Industry frame lines typically combine decoil, level, multi-station hydraulic punching (notches, blade holes), roll form, and cut — often followed by folding/riveting off-line.

This page’s recommended band follows that layout with servo feed and multi hyd punch before forming. Not a blade mill, not a generic rectangular duct line, and not a full auto housing folder that folds the whole box on one special line.

2. Process outline

1. Decoil (single-cantilever passive ~3 t class)
2. Seven-roll level
3. Servo feed
4. Multi hydraulic punch (4-post, Cr12MoV)
5. Roll form (~16 passes)
6. Hydraulic punch/cut
7. Roller exit → PLC/HMI

3. Technical parameters (recommended band)

4. Conflicts / variants

• VCD Frame English quotation: max process speed ~20 m/min; form ~7.5 kW; pre-punch hyd station ~11 kW; servo ~2.2 kW; gantry wall-plate ~16 rolls; shaft ~φ65; feed width ≤~350 mm; thick ~1.5–1.8 mm; decoiler ~1.5 t; length tol. ~3 m ±1.5 mm. Keep beside the recommended band — do not overwrite 0–6 m/min with 20 m/min as a single truth.
• 旁证 C / Z mills: width/thickness/power differ — not frame-only answers.

5. Related machines

• Damper blade line — vane profiles; ~0–15 m/min / ~11 kW class
• Folding / riveting platforms — often third machines in “full damper workshops”
• Generic duct or C/Z mills — different tooling paths

6. Applications

• Fire damper and smoke damper frame sections
• VCD / volume-control damper frames when drawings match

7. Inquiry checklist

• Frame CAD and notch / blade-hole map
• Thickness and strip width
• Recommended punch-speed band vs EN quotation (~20 m/min) — pick one
• Whether folding/riveting is inside the quote

8. Buyer FAQ

Can blade 0–15 m/min / 11 kW be used here?

No. Blade and frame lines must stay separate.

Is auto frame bending included?

Market full auto lines often add bending/riveting. Confirm whether the proposal stops at cut-to-length frame profiles or includes folding.

Why two speed stories?

The recommended punch band (~0–6 m/min) and the EN quotation (~20 m/min max process) are different documents — publish both side by side, never average them.

Same as a rectangular duct line?

No. Damper frame notch/punch patterns and section geometry are specific to HVAC damper casings.