Winding and unwinding tension automatic correcting method of wire drawing machine

An automatic correction, winding and unwinding technology, applied in the field of control, can solve the problems of difficulty in controlling the tension of the winding material, deformation of the winding roller, etc., and achieve the effect of keeping the winding efficiency constant, the tension constant, and the force reasonable

Active Publication Date: 2012-12-05
EURA DRIVES ELECTRIC
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  • Abstract
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Problems solved by technology

[0005] The purpose of the present invention is to provide a control method for automatically correcting the winding tension of the wire drawing machin

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  • Winding and unwinding tension automatic correcting method of wire drawing machine

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Embodiment Construction

[0022] According to the well-known physical principles, the linear velocity of any point on a rigid body rotating around a fixed axis is equal to the product of the angular velocity and the distance from the point to the axis of rotation, while the power is directly proportional to the torque and inversely proportional to the rotational speed. Therefore, in the winding process controlled by constant torque, in order to maintain a constant winding line speed at the winding diameter of the winding material on the winding roller, the output frequency of the inverter driving the winding roller motor needs to change with the change of the winding diameter. According to the relationship between the output frequency of the frequency converter and the linear velocity at the coil diameter of the material, as well as the relationship between the output power of the frequency converter and the torque of the motor, it can be concluded that adjusting the output torque of the frequency conver...

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Abstract

The invention provides a winding and unwinding tension automatic correcting method of a wire drawing machine. The method comprises the following steps: setting a radius of an winding roll in an empty state for a frequency converter; setting a frequency converter output frequency when the winding roll is empty; setting a radius of the winding roll in a fully-wound state for the frequency converter; setting a frequency converter output frequency when the winding roll is fully wound; and in the winding process, adjusting an output torque of the frequency converter according to the rolling diameter radius of a wound material, so as to change the torque of a winding roll motor, so that the tension of the wound material is constant. According to the invention, the tension in the winding and unwinding process can be constantly controlled.

Description

technical field [0001] The invention relates to a control method, in particular to a control method for winding and unwinding tension of a wire drawing machine. Background technique [0002] At present, in the wire drawing machine industry, when using winding and unwinding equipment for high-speed winding materials, the commonly used control methods include constant torque control and PID adjustment with tension sensor feedback. Using a PID adjustment system with tension feedback requires additional capital investment, large-scale transformation of the control circuit of the winding and unwinding equipment, and frequent maintenance of the tension feedback sensor, which increases maintenance costs. [0003] Constant torque control is to use the frequency converter to adjust the output power of the rewinding roller motor to ensure that the motor torque of the rewinding roller motor is constant when it is loaded, and to ensure that the rewinding roller can complete the high-spe...

Claims

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Application Information

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IPC IPC(8): B21C1/12B21C47/04
Inventor 林海光周磊张祥杨高孟
Owner EURA DRIVES ELECTRIC
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