FIELD: process engineering.
SUBSTANCE: inventions relate to metal forming and can be used in forging with burnishing. Billet is arranged between two rolls, each having shaped working surface corresponding to that of finished part. Billet is burnished by rolls swinging in opposite directions with the help of drive. Note here that rolls are pressed to billet with burnishing force. Burnishing is performed in turns in lateral directions relative to billet lengthwise axis. Proposed device comprises frame, top and bottom rolls having toothed sectors, two drive hydraulic cylinders and two rotary hydraulic cylinders. Drive hydraulic cylinders have hinged levers that make four-link mechanism to lift and down top roll and impart burnishing force to it. Rotary hydraulic cylinder rods are articulated with rocker to transfer angular momentum and burnishing force to bottom roll. Wedge mechanism is arranged to lift and down bottom roll and to transfer burnishing force to it. Top roll is turned because its toothed sector engages with bottom roll toothed sector, bottom roll displacing toothed rack with billet.
EFFECT: higher quality of forged parts.
10 cl, 12 dwg
