Ball rolling machine

The invention discloses a ball rolling machine. The ball rolling machine comprises two core shafts with two collinear central axes, locking parts which can be attached and connected to fix a scrap edge are correspondingly arranged at the end parts of the two core shafts, each of the outer sides of the two core shafts is provided with a magnetic disk, at least one core shaft is provided with a conical side wall, the outer diameter of the conical side wall is gradually increased from the locking part to the direction away from the locking part, so that the scrap edge can be prevented from overflowing to the magnetic disk. The outer side walls of the core shafts exert acting force towards the direction of the locking parts on the scrap edge, the scrap edge moves close to the locking parts between the two core shafts, so that the movement of the scrap edge to the two magnetic disks at the two ends is reduced to prevent the scrap edge being clamped between the core shafts and the magnetic disks, and the effect of