C/Z Interchangeable Purlin Roll Forming Line

1. Definition

A C/Z interchangeable purlin roll forming line (also Cee & Zed combined / CZ interchangeable purlin machine) produces both C and Z structural purlins on one host by changeover — manual 180° flip, roll change, screw / motor size adjust, or servo-assisted recipes — instead of buying two single-section mills.

It is not a dedicated Automatic C80-300 C-only line and not a dedicated Z80-300 Z-only line. Market combined Cee/Zed hosts likewise advertise one machine for both shapes with PLC size change in minutes; use that only as industry context and keep documented power / speed tiers separate below.

2. Process and applications

Typical station order:

1. Uncoiling
2. Leveling
3. Hydraulic punching (some schemes list two punch groups)
4. Roll forming with C/Z changeover hardware
5. Hydraulic cut-off (heavy / English schemes may add straightening; servo-assisted schemes may add front shear + post-form flying cut)
6. Exit

Applications. Steel-structure roof and wall purlins where the plant must run both C and Z without a second dedicated line. If the plant runs only C or only Z at high volume, a single-section host is usually simpler.

3. Reference parameters (keep tiers separate)

Common section envelope on English combined tables: height about 80–300 mm, width about 40–80 mm, lip about 10–20 mm. Chinese vs English height/width naming may swap axes — lock dimensions to the contract drawing. Drive wording: Chinese scheme emphasizes hardened gearbox + inverter; some large English schemes list chain drive; controls Siemens class on English quotes, Xinje class on one servo scheme — BOM decides.

4. Boundaries and conflicts

• Dedicated C or Z Automatic tables — Different hosts. Do not copy C80-300 or Z80-300 kW / speed onto a CZ interchangeable proposal without labeling the interchange tier.
• Averaging Standard and Quickly — Forbidden. 18.5 kW / 0–15 vs 22 kW / 0–25 are side-by-side options.
• Heavy 37 kW as the default answer — No. Heavy is a separate scheme.
• Light-gauge stud / track lines — Not structural purlin interchange lines.
• Changeover method — Manual flip, multi-station roll change, and servo auto recipes coexist; describe what the quotation actually includes.

5. Buyer FAQ

Is one CZ interchangeable line the same as buying a C machine plus a Z machine?

No. It is one host with changeover hardware. Dedicated single-section lines remain the right answer when only one profile runs at high volume.

Which speed should I publish — 20, 0–15, or 0–25 m/min?

Name the tier. Chinese 2.0–3.0 cites about 20 m/min; Standard/New cites forming 0–15 / production 0–12; Quickly cites forming 0–25 / production 0–18.

Does punching come with the line?

Hydraulic punching is part of the documented process chain; some schemes list two punch groups. Hole layout still follows the buyer drawing.

Can I use Automatic C80-300 power on a CZ quote?

No. Keep single-section Automatic tables and CZ interchange tables separate.