Machine for automatic in situ welding according to a curvilinear section profile and having programmable extrapolation control

摘要

A machine for automatically welding parts which need to be assembled has detection means which include a locating telemeter capable of measuring a selected distance between the machine and one of the parts. A programmable control device is provided with a memory wherein are stored the coordinates of the passing points of a welding torch. The coordinates are distributed on a curvilinear section of a welding profile. The machine includes first calculation means for determining the location of the passage points and for defining, by circular extrapolation, a series of points defining the curves joining the passage points and corresponding to the curvilinear section, so that a shifting system matches the successive positions of the torch with the section. The invention is suitable for in situ welding, for example to produce membranes for fluid confinement tanks.