A multi-equipment coordinated control method for a large side press

Abstract

The invention provides a large side pressing machine multi-device coordination control method and belongs to the field of automatic control. A crank / angle detection module, an interrupt control module and a proximity switch are arranged. In the whole rolling period process of a side pressing machine, actual positions of the side pressing machine in a side pressing period can be monitored in real time through detection on rotation angles of a crank. When the side pressing machine reaches a set position, relevant signals and PLC process actuation are updated immediately based on interrupt technologies, therefore, movement steps or operation states of a compression roller device or a pinch roll device or a width adjusting device are coordinated uniformly and forcibly, and the purpose of controlling synchronism of each mechanism accurately under the condition that mechanical synchronizing devices are not used is achieved. The method is based on an existing control system and mechanical structure and provided from the rolling process period of the whole side pressing machine, therefore, synchronous coordination effect is better, demands for production processes are met better, control effects are reliable, and the method is easy to achieve and popularize and can be widely applied to the production process control field of the side pressing machine.

Description

technical field [0001] The invention belongs to the field of automatic control, and in particular relates to a method for coordinated control among multiple devices of a large side press. Background technique [0002] As a main equipment for width adjustment and a new width adjustment technology, side press has been widely used in hot rolling process. [0003] At present, the side presses mainly used are mainly divided into two types: continuous type and stop-and-go type. During the rolling process, each mechanism module will produce reciprocating motion in the vertical direction of the slab running. A side pressing cycle, in this cycle, the various mechanisms (pinch rollers, roller tables, module synchronization mechanism, etc.) Otherwise, uneven force on the module, inconsistent adjustment of the roll gap on both sides, or friction of the slab against the module during transportation will easily occur, resulting in product quality problems such as damage to the edge of th...

AI Technical Summary

Problems solved by technology

[0021] The mechanical synchronization mechanism can ensure that the relevant components can always be synchronized during operation, but its structure is complex, and its synchronization performance depends on the size and gap control of the mechanism and related equipment. Differences can easily lead to reduction or even failure of synchronization performance. The maintenance cost and installation accuracy requirements are very high, and because the synchronization is realized by the mechanical structure, the synchronization mode cannot be easily changed, which reduces the flexibility of the rolling mode of the large side press.

[0022] The use of PLC logic control method can avoid the influence caused by the wear and aging of the synchronous mechanism. At the same time, the synchronous mode of each mechanism of the whole side rolling mill is controlled by the program, which can realize the free switching of various synchronous modes and improve the rolling mode. Flexibility; however, it has high requirements for the response speed of the PLC system. In the high-speed operation stage, due to the limitation of PLC operation speed and sequential execution mode, there is a certain delay in its control, which reduces the synchronization performance

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