Introduction to Welding Head of Laser External Light Path 1

Laser welding system: The optical path design of the laser welding system mainly consists of an internal optical path (inside the laser) and an external optical path:

The design of the internal light path has stricter standards, and generally there will be no problems on site, mainly the external light path;

The external optical path mainly consists of several parts: transmission fiber, QBH head, and welding head;

External optical path transmission path: laser, transmission fiber, QBH head, welding head, spatial optical path, material surface;

The most common and frequently maintained component among them is the welding head. Therefore, this article summarizes the common welding head structures to facilitate laser industry engineers to understand their principle structure and better understand the welding process.

Laser QBH head is an optical component used for applications such as laser cutting and welding. The QBH head is mainly used to export laser beams from optical fibers into welding heads. The end face of the QBH head is a relatively easy to damage external optical path device, mainly composed of optical coatings and quartz blocks. The quartz blocks are prone to breakage caused by collisions, and the end face coating has white spots (high anti burn loss coating) and black spots (dust, stain sintering). Coating damage will block the laser output, increase laser transmission loss, and also lead to uneven distribution of laser spot energy, affecting the welding effect.