Abrasion-proof low-frictional-resistance roll journal and production process thereof

Abstract

The invention discloses an abrasion-proof low-frictional-resistance roll journal. Journals are arranged at two ends of a roll body, and groove structures for storing lubricating oil are arranged on the surfaces of the journals. The invention further discloses a production process of the abrasion-proof low-frictional-resistance roll journal. The production process includes the steps: (1) preparing a blank of a roll; (2) subjecting the roll to thermal refining; (3) subjecting the roll journals to rough machining; (4) performing accurate grinding for the roll journals; (5) texturing the roll journal surfaces by Nd:YAG pulse laser to form the evenly distributed groove structures; and (6) removing processing burr. The rigidity of lubricating oil films of the roll journals is enhanced by the groove structures for storing the lubricating oil, accordingly, the thicknesses of the lubricating oil films are increased, frictional resistance and abrasion in the condition of mixed lubrication of mechanical friction pairs are reduced, abrasion between each roll journal and a bearing is reduced, the service life is prolonged, and cost is reduced.

Description

technical field [0001] The invention relates to the technical field of rolling equipment, in particular to a roll journal with wear resistance and low frictional resistance and a production process thereof. Background technique [0002] The roll is an important part of the rolling mill in the rolling mill. It uses the pressure generated by a pair or a group of rolls to roll the steel. It is a tool for plastically deforming the metal rolled material and an important consumable part that determines the efficiency of the rolling mill and the quality of the rolled material. . Rolls have the most complex working conditions among rolling mill components, and are mainly subjected to dynamic and static loads, wear and temperature changes during rolling. For example, the roll will produce residual stress and thermal stress in the preparation process before manufacture and use. When in use, it is further subjected to various cyclic stresses, including bending, torsion, shearing, con...

AI Technical Summary

Problems solved by technology

The existing roll journals have the following defects: 1. The journal adopts a smooth surface with low roughness, which will cause low stiffness of the lubricating film, resulting in large frictional resistance and high wear rate; 2. Large frictional resistance leads to low energy efficiency Disadvantages; 3. The method of induction hardening, when the size of the roll changes, brings a lot of additional work, reduces production efficiency, increases production equipment, and thus increases production costs; 4. Induction hardening inevitably produces a small amount of deformation, which generally requires In the fine grinding process, due to the high hardness after quenching, the difficulty of fine grinding increases and the production cost increases; 5. Induction hardening requires cooling liquid, which has certain pollution to the environment, and the generation of high temperature and radiation is not good for the health of workers

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