FIELD: metallurgy. SUBSTANCE: machine has carriage with device for supporting rod in front part of carriage, sliding device for supporting rod in rear part of carriage and grip mounted on carriage for sliding and adapted to clamp rod in predetermined location between front and rear parts of carriage. Stroke multiplier is connected between jack and grip so as to move grip. Jack control devices allow grip to reciprocate between position B in front part of carriage and position A offset from position B by distance L. EFFECT: increased efficiency and enhanced reliability in operation. 13 cl, 6 dwg
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