A multi-stage crown control roll with internal cooling mechanism

Abstract

The invention discloses a multi-section type convexity regulating and controlling roller with an internal cooling mechanism. A plurality of annular grooves are formed in the surface of a core roller at equal intervals, and annular groove sealing rings matched with the annular grooves are arranged. Two axial water channel holes which are symmetrically formed at 180 degrees are formed in one side ofthe core roller in the axial direction. Two symmetric radial through holes are formed between each annular groove and the corresponding axial water channel hole. The water channels can effectively improve the convexity heat balance rate caused by heat, and the convexity regulating and controlling rate of the roller is increased. A disc type electromagnetic bar is arranged in a central axial through hole of the core roll and is located in the centers of the annular grooves of two core rollers. A flat spiral coil is connected with a slip ring, and then is connected with an external variable-frequency power supply and a cooler. An external signal line of a temperature sensor is connected with the slip ring and then connected to a temperature control module. The model is high in flexible regulating and controlling capability, the regulating and controlling range is wide, and a high-order roller type curve which is stable in roller type and continuously variable can be formed.

Description

technical field [0001] The invention relates to the field of steel rolling equipment in the metallurgical industry, in particular to a multi-stage convexity control roll with an internal cooling mechanism. Background technique [0002] Shape control is an important means of strip production. With the advancement of the upgrading of the steel industry, the steel market has increasingly stringent requirements for plate and strip products, especially in terms of plate shape, plate thickness and product performance. In order to further develop the production potential of the existing models and inject new vitality into the production of strips, roll shape control has become a research hotspot in the current shape control technology. Roll shape control technologies such as hydraulic roll bending technology, CVC series technology, segmental cooling technology, VC series technology, and DSR series technology have been applied in production practice one after another, and a series ...

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Problems solved by technology

[0003] However, the above-mentioned technologies have different problems: hydraulic roll bending, CVC series technology, segmental cooling technology and other fixed roll profile online control methods, because of the high degree of dependence on the initial roll profile, and the initial roll profile is in the service of the roll It is easy to wear and change during the process, and it is difficult to achieve long-term stable shape control effect

VC series technology and DSR series technology often show problems of poor rigidity and limited adjustment amount in service due to the driving characteristics of hydraulic components, so they can only be used as support rolls and smoothing rolls

"A roll that can flexibly adjust the roll shape curve" (CN102527727A) found during service that the separation of the induction heating zone and the bulging contact zone will cause temperature to propagate axially, resulting in roll crown fluctuations

"A Segmented Flexible Roll Convexity Control Roll" (CN108372204A) found during service that the axial through hole of the disc-type electromagnetic rod will slightly reduce the stiffness of the roll, resulting in a limited service environment

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