Xiamen Youdeli Industrial Co.,Ltd is one of the most professional automatic adjusted c purlin roll forming machine manufacturers and suppliers in China. Our factory has been specialized in the design, development and manufacturing of good quality products made in China for nearly 20 years. Welcome to try our customized service.
Product Overview
The Automatic Adjusted C Purlin Roll Forming Machine is developed for efficient and flexible production of C-shaped steel purlins used in modern steel structure construction. Designed with an advanced size adjustment system, the machine allows operators to change web width and flange size directly through the control system, eliminating the need to replace rollers. This significantly reduces downtime and improves productivity, especially for manufacturers handling multiple specifications in one production line.
Built for long-term industrial use, the machine features a rigid frame structure, precision-engineered rollers, and a stable transmission system to ensure consistent forming accuracy. It is suitable for processing galvanized steel, cold-rolled steel, and other common construction materials. With automatic control, accurate length cutting, and smooth operation, the line delivers uniform purlin profiles that meet the demands of steel structure projects such as warehouses, factories, and commercial buildings.
Core Differentiation: Roll-Free Size Change Mechanism
The technical breakthrough of this equipment lies in its dimensional adjustment system. Unlike conventional machines that rely on physically replacing roller sets to alter section profiles, the adjustable machine adopts an axially split sliding roller structure. The web width is adjusted via servo-driven synchronized lateral movement of the side upright rollers, while the flange length is achieved through transverse offset of the upper and lower rollers combined with an auxiliary edge-bending mechanism. All adjustment actions are commanded through a PLC and touchscreen interface, with electric or hydraulic actuators completing precise positioning within minutes-compared to the hours of disassembly and reassembly required in the past.
The real-world production value is clear: when an order needs to switch from C200×70 to C250×80, the operator simply recalls the stored parameters, and the machine automatically executes a "zero-return → reposition → lock" sequence. The rollers never need to be removed from the line, die inventory becomes zero, operator skill requirements drop, and dozens of size changes can be handled in a single day without sacrificing effective output. This represents a qualitative shift for steel structure fabricators dealing with urgent orders, small batches, and last-minute supplements.
Machine Structure Design: Exchanging Rigidity for Accuracy
For an adjustable machine to achieve long-term stable operation, electrical control alone is far from sufficient. Equipment manufacturers generally adopt a welded frame made of Q355 steel with a minimum thickness of 20mm. Reinforcing ribs are densely arranged at key load-bearing areas, and the entire structure undergoes stress-relief annealing to eliminate welding-induced deformation. The design philosophy is clear: to suppress torsional deformation of the machine frame when rolling at high speeds with thicker materials (typically 1.5–3.0mm).
The rollers themselves are made of Gcr15 bearing steel or Cr12MoV die steel, subjected to quenching, cryogenic treatment, and surface nitriding, achieving a hardness of HRC58–62. Under frequent size-change conditions, the wear resistance and fatigue spalling resistance of the roller surfaces directly determine the burr size on profile edges and dimensional consistency. Additionally, the transmission system employs hardened-gear reducers paired with universal couplings to avoid mechanical interference caused by axial roller movement. This design effectively reduces gear wear, abnormal noise, and the risk of tooth breakage over long-term use.
Process Adaptability Range
From a material perspective, the equipment is compatible with hot-dip galvanized coils (no special restrictions on zinc layer thickness), cold-rolled black coils, and lightly coated weathering steel. The typical yield strength range covers 235MPa to 450MPa. The forming stations generally number 14 to 18 passes, utilizing a gradual roll design to ensure that no cracking or inconsistent springback occurs at the flange bends.
It is worth highlighting the control of the web-to-flange angle. The last set of forming rollers on the adjustable machine typically includes an additional straightening unit, designed to compensate for "open" or "closed" sections caused by internal stress relief within the material. Practical commissioning experience shows that even different sections of the same coil can exhibit variations in mechanical properties. A well-designed machine reserves "fine-tuning compensation values" within the control system, allowing experienced operators to make real-time corrections to the flange angle within a range of 0.5° to 2° based on their expertise, rather than rigidly following theoretical parameters.
Products Description
Cutting and Length Control Logic
Length control is achieved by a rotary encoder that continuously tracks the material throughout the process, working in conjunction with a servo or hydraulic cutting system. Two common cutting methods are available: cold sawing (spark-free, smooth cross-section, but slightly slower speed) and hydraulic flying shear (fast, but blade life requires attention). For applications requiring holes in the purlin web (such as for electrical or plumbing conduits or bracing rod holes), some machine models can integrate a pre-punching unit that performs the punching during the forming process, avoiding positioning errors from secondary processing. It should be noted, however, that there is a risk of mechanical interference between the punching unit and the roll adjustment system. A well-designed solution places the punching station after the 6th to 8th forming pass, when the strip is already largely shaped but not yet fully closed, leaving a path for scrap discharge.
Real-World Performance
Putting aside ideal test conditions, feedback from actual users shows:
Average time per size change (including profile, length, and quantity): 3–6 minutes
Stable production speed: 0–25 meters per minute (for typical 1.5-3.2mm galvanized steel)
Cut-to-length tolerance: ±1.0mm per 10 meters
Web width adjustment range: 70–300mm
Flange height range: 30–100mm
Some manufacturers offer an automatic stacking system at the discharge end. However, a point worth noting: the purlin section is asymmetrical. Without a guided flanging or turning device during stacking, the pile can easily tilt or even collapse. This is often an overlooked bottleneck in full-line automation.
Applicable Project Types & Selection Recommendations
This equipment is best suited for orders that fit the following profile: small to medium-sized steel structure fabricators, sandwich panel producers, and pre-engineered building manufacturers who handle more than three different purlin specifications per day, with batch sizes ranging from 50 to 500 pieces per run. Typical end-use projects include light-duty warehouses, single-story factories, logistics sorting centers, agricultural greenhouses, and simple commercial exhibition halls.
When selecting a machine, focus on three key hardware indicators:
Repeat positioning accuracy of the adjustment mechanism – It is recommended to measure the first piece after two consecutive size changes to verify consistency.
Relationship between main motor power and maximum material thickness – Typically, 7.5kW to 15kW corresponds to a thickness limit of 2.5mm or less.
Cutting force capacity relative to the highest strength material – For 450MPa material at 2.5mm thickness, a shear force of at least 45 tons is required.
Customer Inspection
The fully automatic adjustable C purlin roll forming machine is not a simple replacement for conventional models. Rather, it strikes an engineering balance between "production flexibility" and "structural rigidity." It will not turn a single line into a universal line, but it can help companies with frequent size-change demands convert hours previously spent on manual changeovers into effective output. For older factories still making purlins by "changing rollers plus adding shims," this machine does not bring a leap in speed-it brings a complete liberation of production scheduling logic.
Hot Tags: automatic adjusted c purlin roll forming machine, China, manufacturers, suppliers, factory, customized, good quality, good service, for design, for sale, made in china, C Profile Furring Roll Forming Machine, Automatic Interchanged Steel Frame Purlin Roll Forming Machine, purlin machines, Steel C Profile Channel Cold Roll Forming Making Machine, Purlin Roll Forming Machine, c purlin machine
