Weld without scratching: CEMSA’S case study in Brazil

CEMSA International has reinforced its position as a trusted technology partner in automatic welding through a successful collaboration with a major Brazilian manufacturer of door locks and hardware systems.

A challenging requirement: automatic welding without removing the protective film

The project focused on the introduction of a lock with a stainless steel faceplate under one strict condition: the scratch-resistant protective film on the visible side had to remain intact throughout the entire production process. This posed a significant technical challenge, requiring a complete rethinking of the welding approach.

CEMSA addressed the issue by developing a high-productivity automatic system capable of welding one piece every five seconds in a continuous cycle. The solution relies on “indirect” projection welding, the ideal method to prevent damage to sensitive surfaces.

Integrated quality control and parameter traceability

The system is built around a six-station rotary table, with each phase monitored in real time. Every component is linked to its welding parameters, enabling automatic statistical process control. A dedicated station verifies mechanical strength, while any process drifts are detected and corrected immediately. Non-compliant parts are automatically separated to safeguard overall quality.

This case highlights how customer focus, technical expertise, and design flexibility make CEMSA a reliable partner for the development of tailored solutions, even in the most demanding production environments.

For further details on automatic welding technologies and plant customization, please contact CEMSA directly using the references provided on this page.