Simulation of Horizontal 2-stands Rolling by Plasticine

Abstract

Synopsis Simulation of horizontal 2-stands rolling by plasticine, for compressive rolling and tensile rolling, is carried out. The following items are clarified. 1) Deformation of side face, upper face and transverse section of workpiece, and distribution of principal strain-rate and slipping velocity against rolls 2) Forces and torques acting on rolls and rolling energy 3) Distribution of pressure, circumferential frictional stress and axial frictional stress acting on the surfaces of rolls 4) Distribution of internal stress in workpiece Then the above experimental results are analysed, and the following facts become clear. (1) All the stress measurements are made with enough accuracy. (2) Distribution of principal strain-rate and others coincide well with the measured stress distributions. (3) Compressive rolling is effective to eliminate the tensile stress in the neighbourhood o f the surface o f workpiece. Tensile rolling slightly reduces rolling energy.

Physical Modeling of Cross Wedge Rolling Limitations

“…Chijiwa et al [15] obtained and presented the results of plastometric tests that aimed to determine the applicability of plasticine as a model material for modelling the behaviour of hot-formed metals. After publishing the research results, plasticine became more frequently used in model testing.…”

Physical Modelling of the Ball-Rolling Processes

“…Yazawa et al [10] used plasticine in the research of an innovative grooveless rolling process, in which flat rolls for rod rolling were used. Furthermore, Chijiwa et al [11] conducted research on double-stand longitudinal rolling in terms of strip geometry, force parameters in rolling, and stress state of the material.…”