Temper mill push-up cylinder roll gap control device and roll gap synchronous control method

Abstract

The invention relates to a temper mill push-up cylinder roll gap control device and a roll gap synchronous control method. The temper mill push-up cylinder roll gap control device mainly comprises a frame, an upper roller, a lower roller, a hydraulic pipeline and a safety valve. The upper roller and the lower roller can move up and down. The temper mill push-up cylinder roll gap control device further comprises push-up hydraulic cylinders, push-up cylinder position sensors, servo valves and electromagnetic valves. The push-up hydraulic cylinders are positioned at the bottom of the frame. The push-up cylinder position sensors are directly connected with a piston of an oil cylinder to trace operating travel of the push-up cylinders. The servo valves drive the push-up hydraulic cylinders on two sides to move to control rolling force of a temper mill and deviation and inclination control of the rolling force. The electromagnetic valves drive the push-up hydraulic cylinders on two sides to move to control quick opening and closing of the rollers of the temper mill. Compared with the prior art, the temper mill push-up cylinder roll gap control device is simple and practicable, roll gap out-of-tolerance of the rollers of the temper mill can be avoided, and yield rate of continuous temper mill units can be significantly improved. Besides, the temper mill push-up cylinder roll gap control device is worthy of promotion in temper mill production lines provided with similar magnetic valve control hydraulic cylinders.

Description

technical field [0001] The invention relates to a roller gap control technology of a hydraulic cylinder for pushing up a temper mill, in particular to a roller gap control device for pushing up a hydraulic cylinder of a temper mill and a method for synchronously controlling the roller gap, and belongs to the technical field of steel rolling computer control. Background technique [0002] The modern tempering machine is controlled by a high-pressure hydraulic system, mainly including a pressure supply system, a servo valve, a solenoid valve, and the final actuator is a hydraulically adjusted oil cylinder. Compared with the early motor-driven system, the hydraulic system is a dynamic system. System changes are correspondingly faster. [0003] In the prior art, the roll control of the continuous annealing and tempering mill in the cold rolling mill adopts a push-up hydraulic system, and the push-up cylinders on both sides of the stand act on the rolls to realize rolling force ...

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is that, due to the inherent limitations of the solenoid valve control position, there is an objective problem that the roll gaps on both sides of the rolls are not synchronized during the period when the lower roll of the skin pass mill moves from the bottom to the upper roll (the roll gap is closed); in order to solve For this problem, it is proposed that during the period when the rolls of the tempering machine are moving from the bottom to the roll (the roll gap does not exceed 10mm), by establishing a functional relationship between the roll gap deviation on both sides of the tempering machine and the conduction and closing time of the solenoid valves on both sides, to ensure that both sides The roll gap deviation is within a small range to achieve the purpose of synchronization

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