Wet drawing machine has heavy-duty water tanks and flip-up water tanks. Suitable for drawing various metal wires of medium and fine specifications, especially suitable for drawing high, medium, and low carbon steel wires, galvanized iron wires, bead steel wires, hose steel wires, tungsten, molybdenum, titanium and other alloy wires, steel cords, copper wires, and aluminum wires, etc.
The wet drawing machine is a small continuous production equipment composed of multiple drawing heads. By drawing step by step and placing the drawing heads in the water tank, the steel wire is drawn to the required specifications.
Looking at several major domestic water tank wire drawing machine manufacturers, are generally equipped with about 20 drawing heads. After each stage of drawing, the wire diameter of the steel wire changes, so the working line speed of each drawing head should also change.
During the entire drawing process, only one motor is driven through a mechanical transmission or gearbox.
Depending on the configuration of the drawing die, the drawing speed of each drawing head also changes. The benchmark of the drawing speed is that the flow volume per second of the steel wire passing through the drawing die at each moment remains unchanged, that is, the following formula must be established
πD 2v1=πd 2v2
D in the formula – the diameter of the incoming steel wire
v1——Linear speed of incoming steel wire
d——The diameter of the outlet wire
v2——Linear speed of outlet wire
The working speed of each drawing head of the water tank wire drawing machine is based on the above formula to ensure that each drawing head operates synchronously.
Since the drawing process of the wet drawing machine is completely completed through mechanical shaft drawing, and these mechanical shafts are driven under the same main shaft, the drawing system at all levels relies on the difference in rotation speed of the drawing wheel and the line tension. Control synchronization and coordination work.
Coolant is required for heat dissipation during work. The take-up part is driven by a small-power motor. It is necessary to keep the thread tension constant during the take-up. If the tension in this section fluctuates, the winding on the take-up I-wheel will be uneven.
The winding link of the wet drawing machine is the core link in the control system of this equipment. This link also directly affects the quality of the steel wire. For winding, there are usually several control methods:
1) It adopts tension roller adjustment, and the tension during winding is guaranteed by the counterweight of the tension roller itself.
2) Using torque control, the tension during winding is determined by the torque given, but the change in winding diameter will lead to unbalanced winding tension.
3) For water tank wire drawing machines with high process requirements, the tension roller adjustment control method is usually used, and the PID correction function of the frequency converter ACS510 is used to control the tension roller adjustment.
