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LLC Evolutioner Frameless Steel Arch Buildings machine

Mobile Roll Forming Machine for Frameless Steel Arch Buildings
Automatic Production Line for Self-Supporting Steel Hangars and Arch Roofs

The mobile roll forming machine is designed for the on-site production of self-supporting curved steel panels used for the construction of frameless steel buildings, arch hangars and self-supporting metal roofs.

The technology makes it possible to construct large-span steel buildings without a conventional internal steel frame.
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Steel coil is formed into a structural profile, cut to the required length and then curved to the required building radius. Several curved panels are connected together using a special seaming machine to form a strong, continuous and self-supporting arch structure.

The equipment can be used for the construction of:

frameless steel hangars
aircraft hangars
agricultural buildings
grain and machinery storage buildings
warehouses
industrial buildings
workshops
garages
livestock buildings
sports facilities
self-supporting steel roofs
temporary buildings
military and logistics storage facilities
Mobile Production Directly at the Construction Site

One of the main advantages of this technology is the possibility of producing the complete structural panels directly at the construction site.

The main forming and curving equipment is installed on a mobile trailer chassis.

The machine can therefore be transported to the building site, where steel coils are converted into finished structural arch panels.

This is particularly important for long panels that would otherwise be difficult or expensive to transport.

The supplied machine has two axles and eight tyres intended for movement around the construction site.

Production Process

The complete production process consists of several stages:

Steel Coil → Decoiling → Straight Profile Forming → Cutting to Length → Curving → Panel Seaming → Lifting → Installation


The supplied technical manual describes the machine as a combination of a roll forming section and an arch bending section, with electrically driven forming and bending and hydraulic cutting.

Main Technical Specifications
Parameter Specification
Machine type Mobile arch sheet roll forming line
Application Frameless / self-supporting steel buildings
Feeding width 1000 mm
Effective profile width Approx. 610 mm
Material thickness 0.8–1.5 mm
Forming stations 13 + 1
Straight panel forming speed Up to 15 m/min
Arch panel forming / curving speed Up to 13 m/min
Seaming speed Approx. 6 m/min
Forming motor 7.5 kW
Curving / bending motor 5.5 kW
Cutting motor 4.0 kW
Additional drive 3.0 kW
Total installed motor power Approx. 20 kW
Cutting system Hydraulic
Cutting tool material Cr12MoV, heat treated
Roll material 45# steel, chromed and hardened
Roller hardness HRC 58–62
Control system PLC
Machine dimensions Approx. 9000 × 2230 × 2200 mm
Machine weight Approx. 9000 kg
Chassis 2 axles / 8 tyres


Different Profile Sizes Available

The machine can also be manufactured for different structural profile dimensions according to the required building span and application

Available configurations may include different:

coil feeding widths
finished profile widths
profile depths
steel thicknesses
arch radii
building spans

For example, depending on machine configuration, profiles can be designed for relatively small buildings as well as large-span self-supporting arch structures