The principle of the head positioning of the wire spinning machine mainly involves the precise control of the rolled piece to ensure that it can be spun at the optimal time point and position. Specifically, this principle is achieved by adjusting the shearing time of the flying shears and the speed of the spinning machine.

 

The principle of head positioning operation for the length correction of flying shears:

 

Delayed ejection: By increasing the start time of the flying shears in front of the finishing mill, the head of the rolled piece is delayed in reaching the filament tube opening. The purpose of doing this is to better control the position and speed of the rolled piece, thereby ensuring the quality of the filament spinning.

 

Real-time adjustment: When the head of the rolled piece exits the wire drawing tube opening, the computer will sample the actual output position Angle value and compare it with the given position value. Based on the comparison results, the computer will calculate the new position given point.

 

Calculate the time for flying shear correction: When the next wire reaches the hot metal detector before flying shear, the computer will sample the current Angle value of the wire drawing tube opening and calculate the time value for flying shear correction based on this Angle value, the new position setting point value, and the rotational speed of the wire drawing tube opening. Add that value to the cutting time of the set length flying shears, and you can get the starting time of the flying shears.

 

This positioning principle, through precise computer control and real-time feedback adjustment, ensures the efficient and accurate operation of the wire spinning machine in high-speed wire rod rolling mills.

 

The rotational speed of the spinning machine can be calculated through the following formula:

 

N = 60 * v/PI * d

 

Among them:

 

n is the rotational speed of the spinning machine, with the unit of revolutions per minute (r/min);

 

v is the rolling speed of steel, with the unit being meters per second (m/s);

 

d is the diameter of the coil, with the unit of millimeters (mm).

 

This formula is based on the principle of equal flow rate per second, that is, the outlet speed of the wire spinning machine and the entry speed of the wire reach equilibrium during the rotation of the wire spinning machine, thereby forming an ideal circular ring shape. By adjusting the rotational speed nn, the number of rotations of the wire in the wire spinning machine can be controlled, which in turn affects the final winding shape and quality of the wire.