FIELD: metal forming.
SUBSTANCE: invention relates to metal forming for making bar and wire of trapezoidal cross-section. Proposed method comprises billet drawing in two passes in two double-roller drawing plates with offset along drawing axis with pairs of vertical and horizontal rollers turned through 90°, wherein at the first transition, dimensionless drawing is performed with formation of barrel-like cross-section in the first pair of rollers with smooth working surfaces, and at second transition forming final trapezoidal profile in second pair of rollers, in which one roller has smooth working surface, and second on working surface annular groove of trapezoidal shape is made.
EFFECT: possibility of increasing accuracy of wire section geometry by increasing filling of all profile angles by metal is provided by drawing from initial workpiece of specified diameter, note here that barrel-shaped profile is formed at first pass, its height being (0_95–1_05) of midline of trapezoid of finally formed trapezoidal profile.
1 cl, 2 dwg
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