METHOD OF HOLES WORKING BY MANDREL (VERSIONS) Russian patent published in 1996 - IPC

FIELD: metals working by pressure, holes surfaces working in particular. SUBSTANCE: piece is subjected to axial and radial efforts by self-movable tool, that has at least three deformation members with asymmetrical edge. Action on piece in axial and radial direction is exercised by each deformation member in turn. In the case direction of effort application is changing so, that at any moment of time acting on piece in axial direction members are based on acting on piece in radial direction members. According to first version frequency of action on piece is taken constant and range of axial direction action on pieces amplitudes change is defined from expression . According to second version frequency of action on piece in axial direction is taken constant and range of change of frequencies of action on pieces is defined from expression , with f - frequency of action on piece; W_min, W_max - correspondingly minimum and maximum allowed power fed to the tool; n≥ 3 - positive integer, to which number of deformation members is multiple; ξ_a.d - amplitude of axial direction action on piece; η - tool efficiency; m - tool mass. EFFECT: improved process. 2 cl, 3 dwg