NEWS
Tags: 

LZH develops glass welding process

Scientists of the Glass Group at the Laser Zentrum Hannover (LZH) have developed a process for laser-based joining of borosilicate and quartz glass.

Complex glass parts are, in most cases, manufactured manually by a glass apparatus maker using a gas flame. Since the process cannot be entirely controlled, the quality fluctuates. LZH’s process includes integrated temperature control that regulates the viscosity of the parts in a pre-defined way during the welding process.

The process uses a CO2 laser beam to provide the required amount of heat energy. The temperature is measured without contact using a pyrometer.

In order to bridge gaps at, for example, L angle geometries, glass powder is added as filler material during the joining process. In doing so, the glass powder is melted and forms a homogeneous welding seam with a constant bead height. The new process setup enables automated joining of glass in various welding configurations, such as butt joints, fillet joints and L angles.

The project was supported by the German Federation of Industrial Research Associations.

Twitter icon
Google icon
Del.icio.us icon
Digg icon
LinkedIn icon
Reddit icon
e-mail icon
Feature

By Dave MacLellan, Executive Director, AILU

Feature

Gemma Church finds that additive manufacturing is being used to transform lives through advanced implants and guides for surgeons

Feature

Matthew Dale looks at what can be achieved by combining robots with lasers, including a novel tool for repairing jet engines being developed by Rolls-Royce

Feature

High-power blue diode lasers are becoming available that have significant advantages over traditional infrared lasers for machining metals. Greg Blackman investigates