STRENGTHENING TOOL Russian patent published in 1997 - IPC

FIELD: plastic metal working, namely deforming and strengthening low-rigidity parts of machines. SUBSTANCE: tool includes body of non-magnetic material, two steel jaws with identical profiles restricted by periodic closed curve whose recesses are filled by inserts of non-magnetic material forming annular chamber opened from axis of tool to its periphery; annular axially magnetized permanent magnet placed on bottom of said annular chamber; deforming members. Said deforming members are mounted in annular chamber with possibility of three-dimensional motion. Said jaws are shifted one relative to another in plane normal relative to axis of body by angle α=180 degrees/n, where n - number of apexes of periodical curve restricting profile of jaws. EFFECT: improved design. 2 dwg