Cooler and water cooling method for bar rolling

Abstract

The invention discloses a cooler for bar cooling. The cooler for bar cooling comprises a nozzle component and a sleeve component comprising a sleeve, a flared inner lined pipe is arranged at one end, close to the nozzle component, in the sleeve, and the end face, close to the nozzle component, of the inner lined pipe butts against the end face of the nozzle component. A first sleeve pipe and second sleeve pipes are arranged in the sleeve sequentially, the longitudinal section of the internal diameter of the first sleeve pipe is flared, a flare of the first sleeve pipe faces one side of the inner lined pipe, the longitudinal section of the internal diameter of every second sleeve pipe is flared, and a flare of every second sleeve pipe faces the first sleeve pipe. The minimum internal diameter of the flare of every second sleeve pipe is minimum aperture phi B through which a bar rolled piece passes, the minimum internal diameter phi C of a flare of the inner lined pipe is 1.3 times of the minimum aperture phi B through which the bar rolled piece passes, and the dimension of the minimum internal diameter phi D of the flare of the first sleeve pipe satisfies phi B<phi D<phi C. The invention further discloses a water cooling method for bar rolling.

Description

technical field [0001] The invention relates to the technical field of rolling technology, in particular to a cooler for bar rolling. The present invention also relates to a water cooling method for bar rolling using the above cooler. Background technique [0002] In the modern rod and wire production process, the application of controlled rolling and controlled cooling technology has become more common. [0003] One of the more typical controlled rolling and controlled cooling technologies is: after the steel billet is heated by the heating furnace, the normal or lower rolling start temperature is used to carry out rolling in the austenite recrystallization zone in the rough rolling and intermediate rolling stages to achieve finer rolling. The purpose of austenite grains; the bar rolled out of the middle rolling mill row enters the water cooling line for cooling, and then is soaked in the conveying guide trough (to make the surface temperature and the core temperature clos...

AI Technical Summary

Problems solved by technology

[0008] To sum up, how to solve the problem of uneven temperature drop when the rolled bar passes through the cooler has become a technical problem to be solved urgently by those skilled in the art

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