Welded fabrication is not a standalone operation — it is the final link in a chain that runs from cutting through bending, from welding to assembly. Every link in that chain carries the outcome of the one before it: the quality of the cut edge affects the weld, and the heat generated during welding determines the final assembly dimensions. At DMK Makina, we run this entire chain under one roof at our production facility in Lüleburgaz.
Why Should Welded Fabrication and Assembly Be Handled Together?
The most common problem encountered on-site is this: parts are produced correctly one by one, but they don't fit together properly when assembled. The cause is usually in one place — heat generated during welding has shifted parts by a few millimeters.
This is exactly why assembly is not a step to be considered after welding. Weld sequence, fixturing and measurement points must be planned with the assembly target in mind. Treating welded fabrication and assembly as separate, unrelated activities is precisely what leads to tolerance loss.
How Does the Process Work?
- Drawing and Manufacturability Review: Your technical drawing is reviewed; joint details, weld accessibility and assembly sequence are checked. A problem identified at this stage is far cheaper to fix than one discovered on-site.
- Cutting and Bending: Parts are produced at the same facility; the cutting method is chosen with the subsequent welding stage in mind.
- Weld Joint Preparation: The joint geometry is opened correctly; penetration is determined at this stage.
- Tacking and Fixturing: Parts are fixed in the target geometry; fixtures are prepared specifically for the project.
- Welding: Our certified welders work within a planned weld sequence and defined heat-input limits.
- Measurement and Quality Control: Geometry is recorded; non-destructive testing is applied on critical jobs.
- Surface Protection: Blasting, primer and topcoat paint for long-term corrosion resistance.
- Assembly: Installation in the workshop or on-site, following the planned sequence and tolerances.
Our Sector Solutions
Every sector expects something different from welded fabrication, and that changes the method and level of control required.
Steel Structures and Construction
In load-bearing systems, welding is directly a matter of structural safety. What's critical here is the correct joint detail, a certified welder, and verifying geometry before assembly. For elements manufactured in the workshop and assembled on-site, dimensional stability also determines delivery time.
Machine Manufacturing
Machine bodies and chassis are expected to meet dimensional precision: the moving components mounted on them need to seat correctly. Weld sequence planning and fixtures are decisive here.
Heavy Industry and Wear Equipment
In bunkers, chutes, buckets and wear parts, the material is often a wear-resistant steel such as Hardox, and welding it is a discipline of its own. If preheating, low-hydrogen electrodes and heat-input control are not applied correctly, cold cracking can appear days after welding is finished.
Energy, Food and Process Facilities
Roundness tolerance and weld seam quality are subject to inspection in tanks, silos and pressure vessels. In this work, cylinder rolling and welding are planned together; if the flat section at the ends isn't eliminated, a gap forms at the weld joint.
Automotive and Supporting Industry
In chassis and connection elements, the expectation is repeatability: the hundredth part must be identical to the first. This is achieved by locking down fixtures and weld parameters.
What Actually Determines Weld Quality Is Not the Equipment
The most common misconception in welded fabrication is that quality comes from the machine. In reality, the order that determines quality is: correct joint design, correct edge preparation, correct material-electrode match, controlled heat input, and a planned weld sequence. Get these right and the result is good; get them wrong and no equipment can save it.
The second misconception is that more weld means a stronger joint. An oversized weld bead means unnecessary heat; unnecessary heat means distortion and residual stress. The calculated throat thickness is sufficient.
The Difference of Single-Facility Production
In welded fabrication, having a part travel between workshops isn't just a waste of time — with every handover, accountability becomes less clear. When cutting is done in one place and bending in another, the cause of a part that doesn't meet dimensions becomes a matter of dispute.
At DMK Makina, cutting, bending, welding, surface protection and assembly are all carried out at the same facility. This means the welding stage is factored in when the cutting method is chosen, and assembly tolerance is factored in when bending is planned.
Welded Fabrication and Assembly at DMK Makina
DMK Makina works on welded fabrication and assembly projects with certified welders, written procedures, and measurement records at every stage. We prepare project-specific fixtures, plan the weld sequence, and treat dimensional stability not as a problem to be corrected after production, but as a parameter to be managed from the very start.
Get in touch with us with your technical drawings — and if you don't have one, you can take advantage of our 2D and 3D design service. We stand ready with engineering support for your projects across the Thrace and Marmara region.