RU1810143C - Rolling roller - Google Patents

Abstract

Usage: the invention relates to metallurgy, in particular to rolling rolls. SUBSTANCE: rolling roll consists of a barrel and necks on which bandages are mounted. What is new in the roll is that on each neck of the roll there is a bandage with cooled cavities on the inner surface, and inside it an axial channel is made with a diameter of - - diOЈ. neck meter clogged with insulating material. 1 ill.

Description

The invention relates to metallurgy, in particular to rolling rolls.

The aim of the invention is to increase the operability of the roll and increase its strength.

The drawing shows a General view of the rolling roll.

The rolling roll consists of a barrel 1 and necks 2, on which bandages 3 are mounted with water-cooled cavities 4 on their inner surface. Seals 5 are installed at the ends of the bandages 3 and openings 6 and 7 are made for supplying and removing water. Inside the necks 2 of the roll, axial channels 8 are made, filled with heat-insulating material. The arrows indicate the water outlet. The thermal management of the roll is maintained as follows. Water through the inlet 6 in the band 3 is supplied through water-cooled cavities 4, washes the neck of the roll 2, respectively, and is discharged through the openings 7 in the band 3.

Example. The proposed rolling roll was tested on a duo mill 260. Rolling rolls were placed in a resistance furnace and heated to a temperature of 900 ° C, the neck of the rolls was cooled with a pressure of 2.5 kg / cm2. The water flow rate was up to 2 l / min. A billet made of a heat-resistant iron-nickel base alloy 100 mm wide, 200 mm long, 5 mm thick was heated to 1200 ° C in a freestanding resistance furnace, it was rolled in three passes to a thickness of 1.5 mm. The temperature of the necks of the rolls reached 120-140 ° C. . Known rolls were also tested on the duo mill 260. The rolls were previously placed in an electric furnace and heated to. A billet made of the same heat-resistant alloy on an iron-nickel base 100 mm wide, 200 mm long, 5 mm thick, preheated to 1200 ° C, was rolled in one pass to a thickness of 3 mm, while the temperature of the roll necks reached 500 ° C. At this temperature, jamming occurred (L

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bearing bearings and peeling of the applied thermal insulation material. Rolls turned out to be inoperative and further rolling is not feasible.

The advantage of the claimed technical solution in comparison with the prototype lies in the fact that the proposed design of the rolling roll allows to sharply increase the working capacity and strength of the roll when the working part of the roll is heated to 900 ° C due to the effective cooling of the necks, the temperature of which does not exceed 120-140 ° WITH. The presence of an axial heat-insulating channel inside each neck of the roll made it possible to reduce the heat

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loss through the necks and reduce the temperature difference along its cross section from 300 to 120 ° С. Formula A rolling roll containing a barrel and heat insulating necks, characterized in that, in order to increase the operability of the roll and increase its strength, the roll is equipped with bandages mounted on each neck, and cooled cavities are made on the inner surface of the bandage, wherein an axial channel with a diameter equal to 1 / 3-1 / 2 of the neck diameter is made in the roll neck to accommodate the insulating material.