Product Overview
The Large Section Z Purlin Roll Forming Machine is a heavy-duty, continuous cold roll forming line engineered for high-load purlin production. Designed specifically for structural steel fabrication, PEB (Pre-Engineered Buildings), and heavy industrial framing, this system processes thick-gauge steel coils into precision Z-sections.
The complete production line integrates coil decoiling, leveling, web/flange punching, progressive roll forming, precision length measurement, hydraulic cutting, and finished-product handling.
Technical Specifications
|
Item |
Technical Specification |
|
Machine Type |
Heavy-Duty Large Section Z Purlin Roll Forming Line |
|
Compatible Materials |
Galvanized Steel / Cold-Rolled Steel / Hot-Rolled Steel |
|
Web Depth Range |
100–400 mm |
|
Flange Width Range |
40–100 mm |
|
Lip Height Range |
10–25 mm |
|
Material Thickness |
1.5–4.0 mm |
|
Yield Strength |
Up to ~550 MPa (application specific) |
|
Power Standard |
380V / 50Hz / 3 Phase (or customized to local electrical codes) |
Key Engineering Advantages
Heavy-Duty Construction: High-rigidity steel plate stands absorb heavy forming forces for long service life.
Coating Protection: Polished roller surfaces (HRC 58–62) prevent damage to galvanized or pre-painted sheet surfaces.
High-Yield Compatibility: Engineered tooling handles structural steel grades up to 550 MPa with minimal spring-back error.
Integrated Automation: Fully automated punching, measuring, and cutting reduce manual labor and material waste.
Applications
Large Z purlins serve as secondary structural framing members across various industrial building sectors:
- Industrial Factories & Warehouses
- Logistics Depots & Distribution Centers
- Large-Span Commercial Agricultural Facilities
- Aircraft Hangars & Commercial Steel Framing
- Solar Panel Racking Systems & Wall Girt Structural Framing
Heavy-Duty Structural Frame
To absorb high forming loads during heavy-gauge processing, the chassis and stands feature:
Reinforced Monoblock Frame: Fabricated from thick structural steel plate to prevent torsional flexing.
Solid Forged Shafts: Precision-ground 40Cr shafts prevent deflection under load.
Side-Thrust Roller Bearings: Maintains strict lateral alignment across every forming pass.
Progressive Deformation Sequence: Gradual bending angles distribute strain evenly across all stations, preserving surface coatings (such as galvanizing) without cracking.
System Components
Decoiler Subsystem: Manual or hydraulic expansion decoiler with snubber arm for heavy coil safety.
Precision Leveler & Guide: Calibrated entry rollers eliminate strip curvature before processing.
Hydraulic Punching Unit: High-speed hydraulic station capable of punching custom hole configurations along the web and flanges.
Roll Forming Mill: Precision-machined forming stands with hardened tool-steel rollers.
Hydraulic Shear: Post-forming cut-off die engineered to match the Z-profile geometry without burrs.
Discharge Handling: Gravity roller tables or optional fully automated stacking systems.
Step-by-Step Production Process
Coil Loading: Feed strip from decoiler into entry guides.
Flattening: Leveling rollers flatten material stress.
Punching: Hydraulic dies punch structural mounting holes according to PLC input.
Forming: Progressive rollers shape web, flanges, and lips step-by-step.
Measurement: Encoder tracks exact profile displacement.
Shearing: Non-stop or stop-and-cut hydraulic blade severs the purlin.
Discharge: Finished purlins move to output racks or automatic bundlers.
Factory Acceptance Testing
Every machine undergoes strict inspection to meet international engineering tolerances:
Structural Frame: Weld integrity, frame alignment, and load-bearing rigidity.
Shafts & Rollers: Dimensional tolerances, hardness verification, chrome plating thickness, and concentricity.
Punching & Shearing: Hole position accuracy, pitch tolerance, cut squareness, and edge finish.
Finished Profile Inspection: Dimensional check of web depth, flange width, lip angle, corner radii, and overall section straightness.
Pre-Shipment Trial: Fully assembled line is tested under power with buyer-specified coil material prior to dispatch.
Technical Data Checklist for Inquiries
Z Purlin Drawings: Detailed profile dimensions (web depth, flange width, lip height, corner radius)
Material Specs: Steel grade, yield strength (MPa), thickness range (mm)
Hole Patterns: Punching drawings, hole sizes, web/flange locations
Production Targets: Desired line speed, average cut lengths, daily output volume
Product Range: Total number of Z purlin sizes and required changeover frequency
Coil Handling: Maximum coil weight and decoiler type preference (hydraulic/manual)
Local Utilities: On-site operating power supply (380V/50Hz/3Ph, 460V/60Hz/3Ph)
Frequently Asked Questions
Q: What Z purlin dimensions can this line produce?
A: The standard reference line processes web depths from 100 mm to 400 mm. Specific web, flange, and lip combinations are manufactured to match your technical profile drawings.
Q: What is the maximum material thickness and steel yield strength?
A: The machine processes thickness from 1.5 mm up to 4.0 mm and handles high-strength structural steel with yield strengths up to ~550 MPa when equipped with heavy-duty drive options.
Q: Can one machine produce multiple Z purlin sizes without manual tool changing?
A: Yes. When equipped with motorized or fully automatic PLC size-adjustment systems, the machine resizes web and flange dimensions via the touchscreen without requiring manual spacer changes.
Q: How are structural bolt holes punched during production?
A: An inline hydraulic punching unit punches web and flange holes on flat steel prior to roll forming, ensuring accurate hole centers and clean hole geometry.
Q: How is machine precision verified before shipping?
A: We perform full pre-shipment assembly and Factory Acceptance Testing using customer-specified material. Profile dimensions, cut lengths, hole tolerances, and electrical controls are verified before dispatch.
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