Method for obtaining gap between rolling mill bearing seat and housing frame in real time

Abstract

The invention discloses a method for obtaining the gap between a rolling mill bearing seat and a housing frame in real time. The method includes the following steps that a displacement sensor is mounted in the position, which corresponds to a working roller bearing seat, on the housing frame or a cylinder block of a balance roller bending cylinder; a measuring point is selected or added on the bearing seat; the position of the displacement sensor or the measuring point is adjusted, and then the measuring point is located nearby the middle point of the measuring range of the displacement sensor; the displacement sensor is used for measuring the distance value between the displacement sensor and the surface of the measuring point in real time; horizontal displacement of the rolling mill bearing seat can be reflected out through the measured distance value, that is, the gap between the rolling mill bearing seat and the housing frame can be reflected out; then adjustment of the gap can beguided; and furthermore by analyzing the detection value, the amplitude and frequency of vibration, in the horizontal direction, of the bearing seat during working of a rolling mill can be obtained, and according to the vibration amplitude and frequency, fault diagnosis is performed.

Description

technical field [0001] The invention relates to the field of automation of metallurgical machinery and equipment, in particular to a method for obtaining the gap between a bearing seat of a rolling mill and an archway in real time. Background technique [0002] The reasonable selection of the gap value between the roll chock and the archway is the prerequisite for the normal production of the rolling mill. For example, in a strip rolling mill, if the gap is too small, the rolls cannot be loaded into the rolling mill, or cannot be pulled out after loading, which will affect the normal roll change; The obvious thickness difference of the strip, the light and dark stripes on the surface of the strip will affect the product quality, and even the strip will be broken. At the same time, it will accelerate the wear of the roll, which will eventually have a negative impact on equipment maintenance, stable rolling operation and product quality. [0003] The traditional clearance con...

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Problems solved by technology

[0004] The traditional gap control strategy has the following disadvantages: First, the width of the bearing housing and the opening of the archway are regularly tested, such as re-testing and adjusting every three months, which cannot guarantee the real-time performance of the gap control, and the gap may be too large but not reached. Check and adjust the cycle. In this case, continuing production will have adverse effects on products and equipment; secondly, the establishment of clearance control standards is based on experience. The lower limit control of the range is too large, that is, the gap adjusted according to the standard is greater than the optimal value, which will affect the horizontal stiffness of the rolling mill and cause vibration of the rolling mill; moreover, the detection of the width of the bearing seat and the opening degree of the archway are all measured by two Several points of the wear-resistant liner and then take the average value. The actual gap value is mainly determined by the high point of the liner, so this measurement method will also cause errors; in addition, the entrance and exit of each roll transmission side, The gaps at the four positions of the entrance and exit of the operation side are changing dynamically, and it is impossible to observe in real time which side the two ends of each roll are shifted to or whether there is crossing of the rolls

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