METHOD FOR STRAIGHTENING ELONGATED PARTS OF LIGHT ALLOYS AND APPARATUS FOR PERFORMING THE SAME Russian patent published in 2001 - IPC

FIELD: machine engineering, possibly straightening welded joints of girder structures of shaped rolled members of aluminium or magnesium alloys. SUBSTANCE: on base in the form of rigid girder or framework screw clamps with holders for their fixation are mounted with possibility of motion. Screw clamps have E-shaped or U-shaped cross section and they are provided with straightening tools in the form of second holders arranged coaxially relative to fixing holders on terminal shelves of screw clamps. Part to be straightened is placed on base for deforming it by means of straightening holders until restoring its nominal size. Then part together with apparatus is heated up to 200-300 C and soaked at such temperature for time interval t= (2-5)h, mm, where h is thickness of part wall, mm. After such procedure part is uniformly cooled and removed out of apparatus. EFFECT: enlarged manufacturing possibilities and enhanced accuracy of straightening due to possibility of straightening at heating. 2 cl