Large vertical type composite ring rolling mill and control method

Abstract

The invention provides a large vertical type composite ring rolling mill and a control method. The large vertical type composite ring rolling mill comprises a frame, a roller mechanism, a left sub roller mechanism, a right sub roller mechanism, a core roller mechanism and a control device. The control device is used for controlling operation of the roller mechanism, the left sub roller mechanism, the right sub roller mechanism and the core roller mechanism. The core roller mechanism comprises a core roller, a fixed support, a movable support, a core roller base and a lifting drive device, the lower end of the movable support is connected with the lifting drive device to enable the movable support to move up and down, the outer side of the fixed support is connected with a rotary drive device which can drive the core roller to rotate, the outer side of the rotary drive device is connected with a locating baffle mechanism, and precise locating of a baffle is achieved through displacement sensors. The large vertical type composite ring rolling mill can be used for automatic composite roll forming of large complex thick-wall deep-groove rings, and a mill user can obtain remarkable economic benefits.

Description

technical field [0001] The invention belongs to the technical field of vertical hot ring rolling machines, in particular to a large vertical composite ring rolling machine and a control method. Background technique [0002] With the continuous development of the national economy and national defense construction, the proportion of large and complex rings used in industry is increasing. Large thick-walled deep groove rings with a diameter of more than 1 meter and complex cross-sectional shapes, such as bilateral flanges, High-pressure ball valve bodies, oil pipeline end joints and slewing bearings are widely used in construction machinery, electric power, petrochemical and other fields. Composite ring rolling process is a new technology for forming such rings, which has the advantages of low consumption, high efficiency, and high-quality forming. The forming of such rings is divided into two stages: 1) Ordinary ring rolling stage, the ring rotates on the driving roller Under...

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Problems solved by technology

At present, there are thousands of small composite ring rolling machines in our country. However, the existing composite ring rolling machines cannot meet the force and space requirements for the rolling production of thick-walled and deep groove rings with a diameter of more than 1 meter. Production mechanization and automation are low, and the rolling process mainly depends on manual visual inspection and manual control of the hot rolling ring process, that is, the operator determines the roll closing speed and rolling force based on practical experience. However, there is a lack of control model, the production process still needs manual operation, and there is no automatic control function. Therefore, it is urgent to design and develop a new type of large-scale vertical composite hot rolling ring machine and related control systems and methods.

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