FIELD: metallurgy.
SUBSTANCE: appressed flat contact surfaces of C-shaped working bush, forming working channel, are implemented with inclination relative to bush edges, bearing on opposite surfaces of wedge and race. Absence grooves and lugs on products while its dragging through collapsible die is provided ensured by that tangent of mentioned maximal angle of slope is tg γmax=0.2 Bo/H, where Bo - nominal, it means without implementation of mentioned angle, bush width; H - bush length in the direction of dragging axes.
EFFECT: providing of ability of guaranteed requirements maintenance of normative documents by condition of surface of high-precision strip electrotechnical profiles.
4 dwg
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