The development and industrial application of efficient methods to join glass with metals which combine the individual advantages of both material groups are a great technological challenge. One research field of the Institute of Materials Science and Engineering is the production of glass metal joints by means of ultrasonic oscillations. Industrial applications are for instance the sealing of glass vessels, fixtures in the vacuum technique or lens sockets. For this reason an industrial ultrasonic torsion welding system normally used for metal weldings was modified to be appropriate for the demands of sensitive glass/metal-joints. With the developed welding system helium-tight joints out of glass and metals can be realized. In comparison to the conventional welding techniques for glass like diffusion welding or adhesive bonding, ultrasonic torsion welding is characterized by short welding times (approx. 500 ms) as well as low welding temperatures (max. 500°C). The produced joints reach high strength under various loading conditions are tight against helium. Further advantages of this joining technique are the high automation capability and the environmental sustainability. Furthermore this technique is to be applied under normal atmospheric conditions. In spite of the low joining temperatures thermal residual stresses occur during the cooling of the joints due to different coefficients of thermal expansion of the used materials. The measurement and calculation of the temperature distribution and the development of thermal residual stresses are a main goal of the investigations.