Research on surface topography wear of textured work roll in cold rolling

Abstract

Purpose -The purpose of this paper is to build a transient wear prediction model of surface topography of textured work roll, and then to investigate the wear performance of different original textured surfaces. The surface topography of steel sheets is one of the most important surface quality indexes, which is inherited from the textured work rolls in cold rolling. Surface topography of work roll is obviously changing in the cold rolling process. However, surface topography is difficult to measure in the industry production process. Design/methodology/approach -This paper presents a numerical approach to simulate the wear process based on the mixed lubrication model of cold rolling interface developed by Wilson and Sheu (Sheu and Wilson, 1994). It is assumed that wear takes place at locations where the surfaces are in direct contact, and the volume is removed by an abrasive particle which is an abstract concept based on the wear phenomenon of textured work roll. At each simulation cycle, the distribution of the contact pressure is calculated by the lubrication model. The material is removed by an abstract abrasive particle and the surface topography is modified correspondingly. The renewed surface topography is then used for the next cycle. Findings -Through comparative analysis, it can be found that the simulation results possess similar statistical characteristic with the measured data. A set of roughness parameters such as the amplitude, spacing and frequency-domain characteristics are introduced to analyze the wear performance of different textured surfaces. Numerical examples show that the surface topography has a significant effect on the wear performance of work roll in cold rolling. Originality/value -The proposed model can accurately predict the wear process of the surface topography in the cold rolling process, which provides the foundation for optimization of original surface topography of textured work roll. The model can also be considered as a tool applicable for research on control of the surface topography of steel strip in the cold rolling process.

Stress-adaptive design of 2D contact interfaces with uniform pressure: A bio-inspired approach

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Evaluation of surface roughness of a machined metal surface based on laser speckle pattern

“…The surface roughness ( R a ) of a machined metal surface has become one of the most important surface quality indices. Surface roughness greatly influences not only the product's appearance, but also the performance, such as tribological properties, friction, wear resistance and fatigue [1, 2]. Although the mechanical stylus instrument is commonly used to measure the surface roughness [3], there are some disadvantages with such methods as they induce surface damage and also have long measuring times [4].…”

Evolution on Topography of Textured Work Rolls and Steel Strips during Cold Rolling and Temper Rolling

“…It has significant effects on high‐quality automobile sheet and home appliance plate in terms of distinctness of image, stamping performance, and binding force between paint and substrate after roller coating or spraying . With an increasing demand for premium automobile and high‐end home appliance, surface quality has become one of the most important indexes to assess the cold rolled steel sheets . During the industrial production process of steel strips, rolling process parameters are generally set and controlled by the computer, according to the strip profile and flatness, work piece materials, and mechanical properties .…”