Thermal drilling as a progressive technology of creating of bushings

The contribution deals with joining of materials and creating of bushings from aluminium materials, with using of new joining technology by thermal drilling, it means by Flowdrill method. This method is using at joining of materials such as sheets, pipes, hollow profile, where the thickness of material does not allow to make the drilling with enough number of threads. Also we can compare this thermal drilling technology with production of smooth cylindrical and conical bushings by forming technologies as hole burnishing. This paper was made with cooperation with firm Commerc Service spol.s.r.o., Presov.