In the metalworking industry, producing a part with dimensional accuracy is only part of the challenge. In many projects, the true value lies in the ability to transform several components into a functional, reliable assembly, ready to be integrated into the client’s final product.
This is where the Assembly / Welding area plays a decisive role, bringing together solutions for assembly, welding and component joining, including brazing, whenever the project requires precision, technical control and reliability of the assembly.
More than a complementary operation, this area is often decisive in ensuring strength, functionality, repeatability, leak tightness and stability in production. When properly integrated, these processes help reduce complexity, improve control over the assembly’s performance and increase industrial predictability.
At ETMA, the Assembly / Welding area is part of the system of 10 Integrated Production Processes, bringing together manual assembly, assembly on transfer machines and assembly on robotised machines, as well as different welding and component joining technologies, including resistance welding, spot welding, brazing and mechanical fastening systems by riveting.
But what makes this area so important in the production of metal components? Let us look at 5 key factors.
- WHEN THE PART STOPS BEING JUST A PART AND BECOMES A FUNCTIONAL ASSEMBLY
Industrial assembly now plays a far more strategic role than simply joining components.
In many projects, this is the stage at which it is validated whether the assembly truly fulfils the function for which it was developed. The individual part may comply with the technical drawing, but the assembled unit must meet additional requirements: fit, strength, movement, torque, stability, behaviour across usage cycles and compatibility with other components.
At ETMA, this capability is particularly relevant because the technical team is qualified to carry out tests on assembled parts, including torque, life-cycle testing, dimensional measurements and tensile/compression tests. This approach enables the development of assembly solutions tailored to clients’ needs.
In other words, assembly is not merely a final stage. It is a critical phase of functional validation.
For sectors such as automotive, electrical, home appliances, fastening, moped or plastic injection / overmolding, this capability makes a difference because it helps ensure that the component is not only produced with precision, but also works correctly in its real application context.
- WELDING ENABLES COMPONENTS TO BE JOINED WITH STRENGTH, PRODUCTIVITY AND REPEATABILITY
Welding remains one of the most relevant joining processes in industry, especially when dealing with metal components that require mechanical strength, stability and series production.
In ETMA’s case, processes such as resistance welding and spot welding stand out, being particularly suitable for industrial applications where repeatability and process control are essential. Resistance welding uses the passage of electric current and the application of pressure to generate heat in the joining area, enabling metals to be joined without the need for additional materials in many cases.
This type of process offers several advantages in an industrial context: it can be automated, enables high production rates, is efficient and, in certain applications, eliminates the need for filler materials such as rods, fluxes or gases.
For the client, this translates into important gains: greater consistency between parts, lower process variability and improved response capacity for medium or large series.
In practice, welding is not merely a way of joining parts. It is a way of ensuring that this joint remains stable, repeatable and ready to meet the requirements of the final product.
- BRAZING ADDS PRECISION TO WELDING AND COMPONENT JOINING SOLUTIONS
Within welding and component joining solutions, brazing is particularly interesting when the aim is to join components while preserving the base metal.
Unlike some welding processes, in which fusion of the metals to be joined may occur, brazing uses a filler metal with a lower melting point than the main materials. This molten metal flows through the joint and, as it solidifies, creates the bond between the components. Technically, brazing is distinguished by joining without melting the base metals, using a filler metal with a melting temperature above 450°C and below that of the materials being joined.
This characteristic makes brazing particularly useful when it is necessary to protect the geometry of the part, maintain the material’s properties, control specific contact areas or ensure clean, precise joints.
ETMA has already highlighted the importance of brazing in a project involving the assembly of subassemblies for water heaters, where processes such as tube machining, crimping, welding and/or brazing were involved, with particular attention to calibration and leak tightness, due to the need to verify the absence of leaks in gas tubes.
It is precisely in this type of application that brazing becomes relevant: when the joint between components must not compromise the functionality, safety or reliability of the assembly.
- THE CHOICE OF JOINING PROCESS MUST BE ALIGNED WITH THE MATERIAL, FUNCTION AND PRODUCTION VOLUME
Not all components require the same type of assembly. Not all materials respond in the same way to heat, pressure, deformation or mechanical stress. And not all projects have the same requirements in terms of production rate, strength or control.
For this reason, the choice between assembly, riveting, crimping, resistance welding, spot welding, brazing or other joining solutions must be made according to the final application.
At ETMA, the Assembly / Welding area works with different raw materials, including steel, stainless steel, brass, aluminium, copper and plastic components. This diversity makes it possible to adapt the process to the nature of the component and to the expected performance in use.
This is complemented by the ability to develop equipment tailored to the client, as well as the use of systems such as the Fanuc Vision M-1iA/0.5S robot, GDY1 transfer machine, TB1 transfer machine and other equipment adjusted to the project.
This flexibility is essential because the best solution is not always the most complex one. It is the most suitable one.
Sometimes, the challenge lies in ensuring robust mechanical fastening. In other situations, the priority is leak tightness, conductivity, resistance to stress, repeatability or integration with other production processes.
This is where technical expertise makes the difference: assessing the function of the part, the material, the production volume and the client’s requirements in order to define the most efficient joining solution.
- INTEGRATION REDUCES COMPLEXITY AND INCREASES CONTROL OVER THE FINAL RESULT
When the Assembly / Welding area is integrated into a broader production system, the client gains more than a technical operation. They gain a complete industrial response.
At ETMA, this advantage is linked to the system of 10 Integrated Production Processes, which enables different stages of the development and production of metal components to be coordinated within the same structure. In the case of Assembly / Welding, the company presents application examples such as moving terminals, arc chambers, screw assembly, electrical connectors, ball joints and rotating shafts.
This integration reduces dependency on multiple suppliers, improves coordination between stages, increases control over product conformity and strengthens response capacity for the client.
For industrial projects, this is a strategic advantage.
When development, production, assembly, testing and control are aligned, it becomes easier to ensure stability, traceability and consistency throughout series production.
And, in a market where clients are increasingly looking for partners capable of simplifying processes and adding technical value, this integration capability becomes a true differentiating factor.
CONCLUSION
Assembly / Welding is a fundamental area for transforming metal components into functional, reliable solutions, prepared to meet the demands of industry.
When properly applied, these processes make it possible to ensure strength, precision, leak tightness, repeatability and greater control over the final performance of the assembly.
At ETMA, this capability is strengthened by being integrated into a broader production system, supported by a technical team, material diversity, assembly means, welding and component joining technologies, including brazing, and solutions developed according to each client’s specific needs.
More than joining parts, it is about joining technical expertise, industrial process and final functionality.
Are you looking for a partner capable of developing assembled and welded metal components with accuracy, reliability and a series production mindset, integrating solutions such as brazing whenever the project requires it?
ETMA provides technical capacity, integrated processes and specialised support to transform demanding requirements into consistent industrial solutions. Contact us and find out how we can support your next project.