method of producing a angeformten nipple on a thin-walled, small metal tube, formwerkzeug for implementation of the procedure and nipple

摘要

in the method of producing a shaped nipple on a thin-walled, small metal tube for the manufacture of motor vehicles, the nipple in his auu00dfenkontur by upsetting the rohrendes with several circular rotating bulges fitted, each of which is in a axialschnitt radial outward flat rising flank and a radial inward steep flank insee the possible overlap with each other. the coiling is carried out in a two formhu00e4lften broken, the end of the tube in the area of the nipple surrounding, axial zusammenschiebbaren, multipart form, whose innenkontur zusammengeschobenen condition in the desired auu00dfenkontur corresponds to the nipple.during the stauchens is at the rohrinnenwand concern, over the whole length of the nipple erstreckender, cylindrical spike is used. it is a big axialdruck at the end of the tube such that the metal at least in the area of the bulges to flow into the pores of the zusammengeschobenen begins to form, and this completely fill out.