Production process

INTRODUCTION TO THE STEEL STRUCTURE PRODUCTION PROCESS

. CTMEKONG Mechanical Co., Ltd. has many years of experience in manufacturing steel frame structures with apertures up to 60 meters, floor areas up to 10,000 m2.

Prefabricated steel structures such as columns, beams, purlins, etc. are manufactured at our factory according to a closed process before being transported and erected at the construction site.
The production process at the factory is very important because the accuracy, quality of the components and the completion of a pre-engineered steel building project are guaranteed or not completely determined by the production process.
After completion, the machining drawings will be transferred to the production workshop.
Throughout the production process of prefabricated steel structures at our factory, engineers control all stages, ensuring the steel frame meets the quality and technical requirements according to the design.
STEEL CUTTING:

Steel structures come in two forms: shaped steel (or cast steel) and composite steel. All input materials have a full Certificate of Quality (CQ) and Certificate of Origin (CO-Certificate of Origin).
Shaped steel is steel structures shaped like H, U, C,... with certain dimensions, such as: H300, I250....
The production process requires composite steel structures. The web and wings of the structures are cut from steel plates with thicknesses from 06mm, 08mm, 10m, 12mm, 14mm, etc. using Plasma cutting machines and hydraulic cutting machines. Our Plasma cutting equipment can cut steel up to 20mm thick, hydraulic cutting machines can cut steel plates up to 12mm thick and 2.8m long.
STEEL JIG & WELDING
After cutting, the flanges and webs of the structure are precisely positioned and assembled with temporary welds.

After precise assembly, the wing and belly structure are automatically assembled on the line and welded using the most modern automatic welding technology available today, which is automatic under-layer welding technology.

Automatic welding technology under a protective layer of flux, also known as submerged arc welding (SAW) is a fusion welding process in which the arc is created by the electrode (welding wire) and the welded work is protected under a layer of flux. welding to avoid harmful effects of air. Under the effect of the heat emitted from the arc, the welding edge, the welding wire and a part of the solder with special ingredients along with a moving speed corresponding to its burning speed, the weld metal cools and fuses. crystallize into a weld.

Welding seam quality is checked by ultrasonic or magnetic testing, and visual inspection of the welded seam surface.
With modern beam welding equipment with high capacity, we can join beams over 16m long, with a steel thickness of 14mm. MIG welding machines with capacities from 500A-650A help our skilled welders ensure weld quality with high technical requirements.

STRETCHING (STRAIGHTENING):

Due to the impact of high temperatures during the welding process, the components may be bent and warped. To ensure the accuracy of the components, the components must be checked, calibrated, and straightened before moving on to the next step.

HAN BAN MA GIA CUONG:

After the components are welded and aligned, the bone details and reinforcement plates are welded with MIG welding machines by highly skilled workers to ensure quality and accuracy according to the design.

CLEANING OF CONSTRUCTION SURFACES:

After processing, the components are transferred to the cleaning area. Here the components are cleaned, surface rusted and treated with a steel shot blasting machine before moving on to the painting stage.
Our surface treatment shot blasting equipment can be used to treat beam sections up to 12m long.

FINISHING PAINT:

The durability and longevity of steel structures depend greatly on the protective coating layer, which protects the steel structure from environmental impacts and creates the aesthetic appearance of the building.

The structure is painted according to customer requirements, with one layer of anti-rust paint on the inside and two layers of paint on the outside. We can meet requirements when customers need to use 1-component or 2-component paint.

This stage is the final stage of the component production process.

FINAL QUALITY CHECK:

After being painted, the components will be inspected one last time by engineers to ensure the finished product meets design requirements, before being transported to the construction site for assembly.

PROCESSING OF PURSURES - ROOF TOLES:

We have a full range of growing machines, equipment for rolling purlins and roofing sheets with sizes and lengths to meet all projects. Therefore, we are completely proactive in designing, manufacturing and completely constructing and erecting all projects, according to customer requirements.