water-cooling
The rolled finished wire rod enters a controlled cooling operation line composed of a water cooling device and an air cooling conveyor. The water cooling device is mainly used to control the spinning temperature. According to the requirements of different steel grades and specifications of wire products, the production process software sets the number of use sections, water volume, etc. of the water cooling device, and the closed loop control of the water cooling device automatically adjusts. The water cooled wire is fed into the wire drawing machine by a pinch roller, and the high-speed advancing wire passes through the wire drawing machine to form a spiral coil with a diameter of about 1075mm, which is evenly laid on the loose coil air-cooled transportation roller table. The roller table type delayed transport line is equipped with 16 large air volume fans, and the upper part of the roller table is equipped with an openable thermal insulation cover. When the roller table transports the loose coils forward, the speed, air volume, opening or closing of the insulation cover of the roller table are set according to the process system according to the different steel grades and specifications to control the cooling speed of the wire. When the coil is transported to the winding machine, the phase transformation has been completed, enabling the finished wire to have a good metallographic structure and the required uniform mechanical properties.
Transport roll collection
The spiral shaped wire smoothly falls into the collecting drum at the “tail” of the air-cooled conveyor, and the coil distributor evenly distributes the coils, reducing the coil height, forming an outer diameter of Φ 1250mm inner diameter Φ 850mm coil. The wire temperature during winding is 350 ° C to 600 ° C. After a coil of wire is collected, the “shutter” supporting plate holds the “nose tip”, and the core cylinder of the winding device descends and rotates, turning the vertical roll into a horizontal roll state. At the same time, the other core cylinder (the core cylinder without coil) rotates from a horizontal position to a vertical position in the center of the winding machine, holding the “nose tip”, and the “shutter” supporting plate opens, allowing the winding work to continue. The coil transport trolley removes the loose horizontal coil wrapped on the core cylinder and hangs it onto the hook of the suspended conveyor (P&F line) in the waiting state. After the coil is hung up, the coil carriage returns and waits for the next coil. The hook carrying the coil is driven along the track by the conveyor chain. The coil continues to cool, and manual inspection, sampling, and head and tail cutting are performed at the inspection station. When the hook continues to run with the coil loaded to the binding station, the horizontal binding machine first presses the loose coil tightly, and then automatically threading and binding. The two production lines are equipped with a total of three balers (one of which is shared by the two lines), and one is reserved. The bundled coils are weighed and marked on the coil type. The hook conveyor finally sends the coil to the unloading station, and the trolley takes the coil off the hook and puts it into the coil collection basket. The empty hook of the P&F line continues to operate and returns to the winding station for recycling. The disk crane in the finished product warehouse lifts the coils in the coil collection basket at the unloading station to the finished product storage area for storage and shipment.