Purlin Machine Steel Profile Forming Machine that uses multiple passes of rollers to gradually cold bend metal strips. Its core function is to continuously produce various cold-formed profiles such as C-Purlin, Z-Purlin, U-Purlin, M-Purlin, CZ Purlin, Omega Purlin, etc. by unwinding, leveling, punching, multi pass roll forming, shaping and straightening, and cutting to length coils of steel strips, galvanized sheets, stainless steel, etc.

Compared with the traditional hot-rolled steel process, cold bending belongs to the cold working process, which uses the rotational friction force of the rolling mill to drive the strip forward, gradually bends the metal through each pass, and finally obtains the design section. The cold work hardening effect can improve the yield strength of profiles while avoiding material damage caused by hot bending processes, supporting fully automatic continuous operation.

 

Standard process flow：

The standard process flow for cold bending production line is:

Uncoiling → leveling → servo feeding → punching → cold bending forming (multiple passes) → shaping and straightening → cutting to length → finished product discharge

1.Uncoiling: The steel coil is placed on the feeding rack and unfolded, and then fed into the production line through the feeding device.

2.Leveling: The multi roll leveling machine eliminates internal stress in the steel strip to ensure flatness.

3.Punching: Install holes are punched online according to product requirements, and the PLC controls the encoder to determine the length. The hole position can be set by the computer in the vertical direction and adjusted by the screw in the horizontal direction.

4.Cold bending forming: The strip is gradually bent to the target section through multiple passes of forming rollers.

5.Plastic straightening: The horizontal roller and vertical roller straightening and correction system is used to fine tune the formed profiles, controlling surface quality and straightness.

6.Cut to length: Hydraulic or flying saw cutting device automatically cuts according to the set length, and the cutting length error can be controlled within ± 2mm

Product Attributes :

1.Formed Material	PPGI,GI,AI		Thickness:1.5-3mm
2.Decoiler	Hydraulic automatic decoiler		Manual decoiler(will give you as free)
3.Main body	Roller station		16  rows(As your requirement)
	Diameter of shaft		80mm solid shaft
	Material of rollers		Gcr 15 with quenched teeatment
	Machine body frame		Metal steel welded
	Drive		Chain transmission
	Dimension(L*W*H)		9500*800*1200(customize)
	Weight		About 7T
4.Cutter	Automatic		cr12mov material, no scratches, no deformation
5.Power	Motor Power		7.5KW
	Hydraulic system power		5.5KW
6.Voltage	380V 50Hz 3Phase		As your requirement
7.Control system	Electric Box		Customized(famous brand)
	Language		English(Support multiple languages)
	PLC		Automatic production of the whole machine. Can set batch, length, quantity, etc.
8.Forming Speed	0-20m/min		The speed is adjustable

 

Full coverage of six major models：

 

1.C-Purlin forming machine

Core parameters:
capable of rolling various types of C-Purlin ranging from 80mm to 300mm, with a main engine length of 9 meters and a net weight of 6 tons; The frame is made of 350H steel, the main shaft is made of 45 # round steel, the rolling mill is made of GCr15 bearing steel, and the quenching hardness is HRC55-58 degrees. The main motor has a power of about 11-22kW, a forming speed of about 10-15 meters per minute, and can handle sheet thicknesses of 0.8-3mm. The number of forming rows is usually 13-28.

Core advantages:

✅  Five roll plate leveling system, arranged in two upper and three lower sections, equipped with front and rear guide rollers

✅  Equipped with horizontal and vertical roller straightening and correction systems during the molding process, effectively controlling surface quality and finished product accuracy

✅  Finished longitudinal ribbed rolling mill, enhancing the strength of steel sections

✅  Punching and cutting the same frame four column structure, PLC encoder sizing, cutting length error ≤ 2mm

Typical applications: factory purlins, roof supports, wall maintenance systems, light steel structure buildings.

 

2. Z-Purlin forming machine

Core parameters:
capable of producing a full range of specifications from Z100 to Z300, with wing height of 55-78mm, thickness of 1.5-3mm, and adjustable hole spacing. The external dimensions are approximately 8500 × 1400 × 1200mm, and the total length of the production line is 17-20m.

Core advantages:

✅  Fully automatic fixed length cutting, automatic punching, stable operation

✅  Z-section design enhances the moment of inertia in the weak axis direction, with overall stability superior to C-Purlin, suitable for roofs with slopes greater than 1/4

✅  Computer control cabinet operation, easy to learn, beginners can quickly get started

✅  Suitable for roof load-bearing capacity and wall support in garages, hangars, exhibition halls, sports venues, and market flower sheds

Typical applications: Large slope roof purlins, large venue steel structures, industrial plant wall supports.

3.U-Purlin forming machine

Core parameters:
external dimensions of 5000 × 800 × 1200mm, main engine power of 15kW, main shaft diameter of Ø 75mm, and a load-bearing capacity of 3 tons for the feeding rack.

Core advantages:

✅  I-beam integral welding machine base, wall panel structure, overall stress relief treatment

✅  When changing specifications, the Haff sleeve form is used, which is easy to operate, reliable and durable

✅  The molding host is equipped with a straightening and correction system, effectively reducing surface scratches

✅  The entire machine adopts an industrial PLC control system and brand electrical configuration (PLC, display screen, frequency converter, encoder)

Typical applications: shelf columns, storage beams, cable trays, U-shaped channel steel frames, European furniture wrought iron bed frames. One device can produce multiple U-shaped groove cross-sections, significantly reducing procurement costs.

4.M-Purlin forming machine

Core parameters:
capable of processing steel strips with a width of 120-600mm and a thickness of 1.2-12mm; using a 24 pass progressive cold rolling system, the equipment has an external dimension of approximately 6500 × 1200 × 1500mm and a motor power of 15kW.

Core Technology:

✅  Four level leveling system: The servo controlled uncoiler integrates four level leveling, high-frequency vibration eliminates internal stress, and the flatness error is kept within 0.08mm/m to prevent warping during the forming process

✅  24 pass progressive forming: disperses metal deformation stress to all passes, and with the proprietary arc-shaped roller profile, the fillet transition accuracy between the M-Purlin flange and web plate reaches R ± 0.1mm, effectively solving the problems of edge cracking and section deformation

✅  Online laser measurement: continuous monitoring of cross-sectional dimensions, height error controlled within ± 0.2mm, flange width controlled within ± 0.15mm

✅  Intermediate frequency induction straightening+fixed length flying saw: realizes customized production of 3-12 meters in length, with a verticality error of less than 0.3 °

✅  Intelligent cloud control system: The 15 inch touch screen supports multiple languages such as Chinese, English, Japanese, and Korean. After entering basic parameters such as the height, thickness, and material of the M-Purlin, the system automatically adjusts 28 process parameters. New operators can get started in 30 minutes after training

Typical applications: logistics shelves, mechanical frames, photovoltaic brackets (especially BIPV photovoltaic roof systems that have both support and drainage functions), M-shaped components for packaging rooms, and building steel structures.

5 .CZ type steel infinite changeover integrated machine

Core parameters:

Electric motor power of 22kW, total weight of 10T, external dimensions of 11000 × 2000 × 1500mm. CZ interchangeable, one machine for multiple purposes, patented infinite cutting and changeover, can be freely changed between C-type 75-300mm and Z-type 120-300mm width, meeting the production needs of small edge 8-20mm, waist height 30-80mm, and plate thickness 1.0-3.0mm.

Infinite switching technology:

✅  Change the shape arbitrarily in units of 1 millimeter: small edge E: 10, 11... 20mm; Waist height H: 30, 31... 80mm; Bottom width W: 80, 81... 300mm, all adjustable infinitely in millimeters

✅  Endless cutting after molding: CZ switching does not require tool change (shared tool setting), no tool change required, direct cutting after molding

✅  Quick changeover: semi-automatic changeover only takes 8 minutes, fully automatic changeover only takes 3 minutes

✅  Hydraulic motor drive: external five-star connecting rod piston type, stable operation

✅  Intelligent control: PLC and touch screen adopt brand, main electrical appliances adopt Schneider, equipped with industrial computer console and 6-meter finished product pallet

✅  Full automatic version change can realize the quick type change of any model of 80-300mm within 1 minute, and the feed inlet is automatically aligned and adjusted, with the molding speed of 8-15m/min

Typical applications: production of large steel structure purlins, CZ steel interchange processing, and multi specification flexible production scenarios.

6 .Omega Purlin forming machine

Core parameters:
capable of processing widths of 100-300mm, heights of 50-110mm, material thickness of 0.8-2.0mm, power of 35kW, external dimensions of 12m × 1.6m × 1.8m, approximately 18 molding stations, production speed of approximately 20m/min. The roller material is CR15 quenched, the spindle is made of 45 # steel, and it is equipped with a 21 inch touch screen operating system.

Core advantages:

✅  High precision PLC control: The operator inputs parameters such as hole spacing and cutting length through the touch screen, and the equipment runs automatically. After production is completed, the machine stops automatically

✅  Hydraulic cutting system: using Cr12 die steel blades, with high cutting accuracy and flat end faces

✅  Flexible customization: Omega Purlin sections of different sizes and profiles can be designed according to customer requirements, supporting OEM/ODM customization

✅  Stable transmission system: The main frame is made of 300H steel with a shaft diameter of 66mm, ensuring long-term stability and accuracy during operation

Typical applications: Railway freight car side columns, roof curved beams, end wall crossbeams, elevated floor crossbeams, photovoltaic bracket Omega purlins, building external wall panel skeletons. Cold formed steel, with its precise size, lightweight, and complex cross-sectional shape, can replace hot-rolled steel in the field of railway freight cars to achieve weight reduction and improve load-bearing capacity.

Application Areas：

The application fields of cold-formed steel have expanded from traditional construction and machinery manufacturing to high-end industries such as new energy vehicles, rail transit, photovoltaic energy storage, and marine engineering. The construction industry is the largest application market for cold-formed steel, accounting for approximately 40%.

Application Field	Typical Scenarios	Recommended Machine Type
Building Steel Structures	Factory purlins, roof supports, wall maintenance systems	C Purlin Machine / Z Purlin Machine
Photovoltaic New Energy	PV brackets, BIPV waterproofing systems, tracking brackets	M Purlin Machine / Omega Purlin Machine / CZ Integrated Machine
Warehousing & Logistics	Rack uprights, beams, storage cages	U Purlin Machine / M Purlin Machine
Rail Transit	Freight car side posts, roof curved beams, end wall crossbars	Omega Purlin Machine / Z Purlin Machine
Automobile Manufacturing	Longitudinal beam reinforcement plates, anti-collision beams, battery pack enclosures	High-precision Cold Roll Forming Line
Seismic Brackets	Building MEP seismic support systems	C Purlin Machine / U Purlin Machine

Pattern diagram:

Why choose us：

1.Full range coverage

One stop supply of six major models of C/Z/U/M/CZ /Omega Purlin to meet diverse needs

2.Scheme customization

Specially designed based on profile cross-section, material thickness, and production speed, providing one-stop ODM/OEM solutions

3.Pre sales support

Free process scheme design, sample verification, and quotation after determining the molding scheme

4.Installation and debugging

Professional engineers come on-site for installation and debugging, and train operators to become independent and proficient

5.After sales response

Dual channel telephone remote diagnosis and on-site maintenance, providing solutions within 24 hours

6.Intelligent operation and maintenance

Combined with Siemens Cloud Maintenance Platform, remote device management, status monitoring, worry free after-sales service

7.Spare parts supply

Regular inventory of key components and vulnerable parts to avoid unexpected downtime

8.Warranty Commitment

Complete machine warranty for 2 years, lifetime technical support and maintenance services provided

 

Frequently Asked Questions：

Q1: Can you do non-standard customization?

A: Okay. Based on your profile section drawings, material thickness, target production capacity, and other requirements, we provide a one-stop customized solution from process design to equipment delivery. Both Omega Purlin and M-Purlin can be designed with different cross-sectional sizes according to customer requirements.

Q2: What materials can the equipment process?

A: It can process various metal materials such as Q195/Q235 hot-rolled strip, galvanized sheet, cold-rolled sheet, stainless steel, high-strength steel, etc., with a thickness range of 0.8-12mm depending on the machine model.

Q3: How efficient is the replacement of the CZ all-in-one machine?

A: Fully automatic changeover only takes 3 minutes, semi-automatic changeover takes 8 minutes. The infinite changeover can be adjusted freely in units of 1 millimeter, and CZ switching does not require changing the blade. After forming, it can be directly cut, greatly improving the efficiency of multi specification production.

Q4: What is the accuracy of M-Purlin equipment?

A: The rounded corner transition accuracy is R ± 0.1mm, the height error is within ± 0.2mm, the flange width error is within ± 0.15mm, and the perpendicularity error is less than 0.3 °, meeting the requirements of high-end applications.

Q5: How to ensure after-sales service?

A: The entire machine comes with a 2-year warranty, providing dual channels for remote diagnosis and on-site maintenance via telephone. Key spare parts are readily available in stock, and overseas project personnel are supported for installation and commissioning. Remote parameter debugging and fault diagnosis can be achieved through the cloud operation and maintenance platform.