Knowledge Transfer Partnership solves problem of optics contamination in laser-in-vacuum welding

Cambridge Vacuum Engineering (CVE) has announced the successful completion of a Knowledge Transfer Partnership (KTP) with Cranfield University that will increase welding options available to engineers worldwide. Together, the two organizations have solved the undesirable optics contamination phenomenon associated with laser-in-vacuum welding, paving the way for full-scale industrial exploitation of the technology.

The conclusion of the KTP is set to yield tangible benefits for companies that want to achieve deeper-penetration welds while improving weld quality, reducing oxidization, and minimizing the time needed for part cleaning after welding.

Laser-in-vacuum welding is a relatively new joining technique that achieves two to three times the depth of weld compared to conventional laser welding methods, CVE reports. However, to date, the issue of optics contamination has hindered its widespread adoption across industry.

Over the last two years, using Innovate UK funding, the teams set up test systems at both CVE and Cranfield to study different aspects of the laser-in-vacuum process and trial various concepts and solutions. Data from experiments on these systems was then used to develop an optics protection system that operates with very low levels of particulate generation.

CVE is now building laser-in-vacuum welding machines featuring the technology. Its optical protection system helps ensure cleanliness levels of welded parts comparable with electron beam welding, the company states.