Drawing, straightening, sectioning and polishing machine

A machine for continuously drawing a product comprising a draw die, a pulling device for drawing the product to be drawn through the die, the pulling device comprising a chassis, a shaft journalled in the chassis, a drum mounted on the shaft and for receiving the drawn product wound thereon, means for driving the drum in rotation, the drum having an input side for receiving the drawn product from the die and an output side from which the drawn product extends, and means for putting the drawn product extending from the output side of the drum under tension so as to cause the drum to perform the drawing action of said product through said draw die, said means for driving the drum in rotation comprising a D-C motor and a circuit for varying the current supplied to said motor as a function of the amount of tension that must be exerted on the product at the output side of the drum so that the latter performs the drawing action of said product, wherein the means for putting the product under tension at the output of the drum comprise a roller cage disposed in the path of the drawn product, driving rollers of the roller cage being rotated by a further D-C motor controlled in accordance with the force to be exerted on the drawn product at the output side of the drum.