Machining method and machining device of bi-metal roller sleeve and bi-metal roller sleeve

Abstract

The invention discloses a machining method of a bi-metal roller sleeve. The machining method of the bi-metal roller sleeve includes the following steps that a rotating mechanism, a casting bottom plate and an outer steel mold used for machining the bi-metal roller sleeve are prepared in advance; an inner steel core is fixed to the casting bottom plate, and a casting space is formed between the inner steel core and the outer steel mold; the rotating mechanism is started, the rotating speed of the rotating mechanism is set to be 25-75 r / min, a casting cup is opened, alloy steel liquid is injected into the casting space, and the roller outer sleeve is formed after the alloy steel liquid is cooled. The invention further discloses a machining device used for the method and the bi-metal roller sleeve machined and produced through the method. In this way, according to the roller outer sleeve manufactured in a cast-in-place manner, due to the fact that when the high temperature alloy steel liquid is combined with the inner steel core in the cast-in-place process, part of the structure of the outer wall of the inner steel core can be melted, thus combination of the alloy steel liquid and the inner steel core is firmer, interinfiltration between the two is more sufficient, and a perfectly combined transition layer is formed.

Description

technical field [0001] The invention relates to the technical field of metal rolls and processing, in particular to a processing method of a bimetallic roll sleeve, a processing device used in the processing method, and a bimetallic roll sleeve produced by the processing method. Background technique [0002] The roll is the most important consumable part in steel rolling production. It is also known as the "mother of steel". my country produces about 800,000 tons of rolls every year. Most of the currently used rolls are traditional integral rolls or sleeve-type composite rolls, and sleeve-type composite rolls are currently only used in the field of bar and wire rolling. The sleeve-type composite roll is composed of a roll shaft and a roll sleeve. The roll sleeve is nested outside the roll shaft and is driven by the roll shaft to contact the steel billet to cause plastic deformation of the steel billet. The roll sleeve needs to withstand a large rolling force when in use, an...

AI Technical Summary

Problems solved by technology

And the current bimetallic composite roll, one method is to use the pre-fabricated roll inner sleeve and roll jacket, and then use mechanical pressure to press the roll inner sleeve into the roll jacket to form a bimetallic composite roll sleeve, and then perform necessary heat treatment , such a combination method has the defects of incomplete combination and gaps in the bonding layer; another method is to fix the inner steel core and the outer mold, and cast the alloy steel liquid by bottom casting method to form the roll jacket. This combination method is also There will be defects such as impurities and bubbles in the bonding layer

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