Rod and wire rolling mill control method and device

Abstract

The invention discloses a rod and wire rolling mill control method and device. The method comprises the steps that a set rotating speed value of a rod and wire rolling mill is controlled to increase or decrease to a target rotating speed value in a process that the rod and wire rolling mill works according to the set rotating speed value, and the actual rotating speed value of the rod and wire rolling mill is made to present a step response; the set rotating speed value and the actual rotating speed value of the rod and wire rolling mill are collected in the process that the actual rotating speed value of the rod and wire rolling mill presents the step response; an equivalent proportionality coefficient and an integral time constant are identified according to the collected set rotating speed value and the collected actual rotating speed value; a transfer function of the rod and wire rolling mill is determined according to the identified equivalent proportionality coefficient and the identified integral time constant; and the rod and wire rolling mill is controlled to work according to the transfer function. The transfer function more conforming to the actual rotating speed of therod and wire rolling mill can be obtained, the rod and wire rolling mill is then controlled to work, accumulation of rods and wires on the rolling mill is effectively prevented, and the rod and wire production efficiency is improved.

Description

technical field [0001] The invention relates to the field of rolling mill control, in particular to a method and device for controlling a bar and wire rolling mill. Background technique [0002] This section is intended to provide a background or context to embodiments of the invention that are recited in the claims. The descriptions herein are not admitted to be prior art by inclusion in this section. [0003] The continuous hot rolling production line of rods and wires refers to the way of physical deformation, so that the thick and short steel billets are continuously squeezed to form thin and long steel products. [0004] Before the steel billet is sent to the rod and wire rod hot rolling production line, the steel billet needs to be heated. The steel slab at room temperature is moved to the heating furnace through the walking beam, and the heating furnace uses coal gas or natural gas to heat the slab. In the heating furnace, the steel billet is continuously moved by ...

AI Technical Summary

Problems solved by technology

[0015] The embodiment of the present invention provides a rod and wire mill control method, which is used to solve the technical problem in the prior art that the transfer function derived from the built-in parameters of the frequency converter is used to control the rod and wire mill, so that the actual speed of the rod and wire mill has a large deviation , the method includes: during the process of the bar and wire mill working according to the set speed value, controlling the set speed value of the bar and wire mill to rise or fall to the target speed value, so that the actual speed value of the bar and wire mill presents a step response; In the process of the actual speed value of the bar and wire mill showing a step response, the set speed value and the actual speed value of the bar and wire mill are collected; according to the collected set speed value and actual speed value, the equivalent proportional coefficient and integration time are identified constant; according to the identified equivalent proportional coefficient and integral time constant, determine the transfer function of the bar and wire mill; according to the transfer function, control the work of the bar and wire mill

[0016] The embodiment of the present invention also provides a rod and wire mill control device, which is used to solve the existing technology of using the transfer function derived from the built-in parameters of the frequency converter to control the work of the rod and wire mill, so that the actual speed of the rod and wire mill has a large deviation Problem, the device includes: a rolling mill speed adjustment module, which is used to control the set speed value of the bar and wire mill to rise or fall to the target speed value during the work of the bar and wire mill according to the set speed value, so that the actual The speed value presents a step response; the data acquisition module is used to collect the set speed value and the actual speed value of the bar and wire mill during the process of the actual speed value of the bar and wire mill showing a step response; the parameter identification module is used to The collected set speed value and actual speed value are used to identify the equivalent proportional coefficient and integral time constant; the transfer function determination module is used to determine the transfer function of the bar and wire rolling mill according to the identified equivalent proportional coefficient and integral time constant; Control module for controlling the operation of the rod and wire rod mill according to the transfer function

[0017] The embodiment of the present invention also provides a computer device to solve the technical problem in the prior art that the transfer function derived from the built-in parameters of the frequency converter is used to control the work of the rod and wire mill, so that the actual speed of the rod and wire mill has a large deviation. The computer equipment includes a memory, a processor, and a computer program stored on the memory and operable on the processor. When the processor executes the computer program, the above rod and wire rolling mill control method is realized.

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