The so-called large-diameter steel bars, especially the round steel with a diameter of 25mm or more, are more difficult to process, because the yield strength and tensile strength of the round steel will gradually increase with the increase of the diameter. The larger the diameter, the more the wire is placed. More difficult, it is impossible to achieve manual threading when threading the inverted wire drawing machine.
At this time, it is necessary to use the automatic pay-off machine to adopt the active pay-off shape, place the reinforcing bar on the cantilever of the pay-off machine, loosen the reinforcing bar with the rotation of the cantilever, and enter the pressing device and pre-align The device makes the round steel straight before entering the inverted wire drawing machine, which facilitates the entry of the round steel into the wire drawing machine.
In order to solve the problem of the shape of the round steel, it has to be processed by the shaving head. Only after the shaving is passed, the drawing die of the inverted wire drawing machine can be passed, and the clamping clamp is required to complete the drawing process of the inverted wire drawing machine. complex.
In this process, the more commonly used round steel cutting heads are hydraulic pusher type and automatic cutting type. The length of the cutting head is generally 400mm, so that it meets the requirements of the drawing die of the inverted wire drawing machine. The drawing of large diameter steel bars can only be started after completion.
After the clamp clamps the steel bar, slowly open the inverted wire drawing machine, so that the steel bar is slowly wound onto the roll of the inverted wire drawing machine. After reaching a certain number of turns, the steel bar automatically leaves the pressure wheel and falls onto the drop frame. At this time, the clamp can be loosened so that the steel head is fixed on the drop frame, and the inverted wire drawing machine is continued to be started and the speed is slowly increased.