Multistage roller cover combined inner-cooling type large-scale supporting roller

Abstract

The invention discloses a multi-sectional roll shell combined inner-condensing large scale back-up roll, which is characterized in that a mandrel (1) is thermally assembled, embedded and sleeved with a multi-sectional roll shell (2), the outer surface of a roll barrel of the mandrel (1) is processed with a cooling tank (6) and an annular communicating groove (5), wherein, the cooling tank (6) and the annular communicating groove (5) from a sealing cavity chamber with the multi-sectional roll shell (2) that is sleeved in the mandrel (1); the interior of the both ends of the roll barrel of the mandrel (1) is processed with a water diversion channel (4), one end of the water diversion channel (4) is communicated with the annular communicating groove (5), while the other end is communicated with a water inlet channel (3) and a water outlet channel (7) of the both ends of the mandrel (1) respectively. As the surface of a roll core (1) of the invention is processed with the cooling tank which can cool the multi-sectional roll shell (2), the relative friction of the roll shell and a roll core is greatly enhanced. The multi-sectional roll shell (2) causes the height of average roll shell to reduce, which is suitable for the volume production and forging production of the ring rolling mill. When the thickness of the roll shell is decreased to the degree of scrap, the exchange of the multi-sectional roll shell (2) leads the roll core (1) to be repeatedly used, thus reducing the production cost.

Description

technical field [0001] The invention relates to the technical field of metallurgical machinery, in particular to a multi-section roller sleeve combined internal cooling large support roller. Background technique [0002] With the development of modern strip mills towards large scale, high speed and automation, the corresponding requirements for large back-up rolls of strip mills are getting higher and higher. The large backup rolls used in strip mills should meet the following rolling characteristics: 1. High compressive strength and good rigidity, enough to withstand high rolling force and peak load; 2. Good toughness, 3. The working layer of the roll body has good wear resistance and fatigue resistance to reduce roll consumption; 4. The working layer of the roll body has uniform structure and hardness, making the whole The roll surface has uniform wear resistance; 5. It has good corrosion resistance to resist the corrosion of high temperature and lubricating or cooling me...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the disadvantages of the existing technology such as expensive large support rolls, complex repair process and unsatisfactory repair effect, the present invention provides a multi-section roller sleeve combined with internal cooling type large support roll. The roll core of the invention can be used repeatedly. The roller sleeve greatly reduces the height of a single roller sleeve, which is suitable for mass production of ring rolling machines or forging production, thus greatly reducing production costs

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