A rolling mill self-excited vibration recognition and alarm device

Abstract

The invention discloses a rolling mill self-excited vibration identification and alarm device. The device comprises a detecting head, a signal processing system and a display system; the display system comprises a computer, and a signal abnormity alarm module mounted on the computer; the detecting head comprises an emitter, an emitting wire and a receiver; the emitter emits ultrasonic signals to aroller to be detected by the emitting wire; the receiver is used for receiving the ultrasonic signals reflected by the roller to be detected and transmitting the reflected ultrasonic signals to the signal processing system; the signal processing system comprises a signal processor; the signal processor is used for processing the reflected ultrasonic signals and converting the processed signals toinformation capable of being identified by the computer to the computer; and the computer and the signal abnormity alarm module judge detecting conditions. The device directly generates one source ofself-excited vibration for a cold rolling mill, that is, local defects on the surface of the roller are detected and identified by using the ultrasonic signals without contacting with the rolling mill, so that the detecting and identifying accuracy is high, and production is not influenced.

Description

technical field [0001] The invention belongs to the technical field of rolling metals, in particular to a rolling mill self-excited vibration identification and alarm device. Background technique [0002] Cold rolling mills are widely used in the forming of metal strips, and their products are widely used in various fields of production and life; however, there are certain vibration problems in rolling mills, especially at the head and tail of the strip. The occurrence of vibration marks affects the surface quality of the strip steel. In serious cases, it is necessary to cut the head and tail or reprocess, which greatly reduces the rolling efficiency and seriously affects the profit of the enterprise. [0003] The vibration of the rolling mill is divided into forced vibration and self-excited vibration. The former is relatively easy to identify and improve, while the latter is difficult to explain its cause. Domestic researchers have done a lot of work on the problem of sel...

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Problems solved by technology

[0006] Aiming at the limitations of existing self-excited vibration identification methods for rolling mills, the present invention discloses a self-excited vibration identification and alarm device for rolling mills, which directly detects one of the root causes of self-excited vibrations in cold rolling mills, that is, local defects on the roll surface, using ultrasonic signals Perform detection and identification without touching the rolling mill, high detection and identification accuracy without affecting production

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