OPTIMIZATION OF THE CALIBRATION PARAMETERS OF THE CHP STATUS WITH THE PURPOSE OF OBTAINING A RATIONAL DISTRIBUTION OF CONSUMPTION ALONG THE PIPE DIAMETER ALONG THE CONE OF DEFORMATION
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Abstract
The aim of the work is to study the influence on the nature of the distribution of compression along the diameter along the deformation cone of such parameters of calibration of the working tool of cold pilger rolling mills of pipes as the value of the initial taper and the degree of steepness of the profile of the generatrix of the groove crest of the gauge, and the same parameters of the generatrix of the profile of the working surface of the mandrel. The studies were based on the developed method for calculating the reduction in diameter along the deformation cone, on a number of dependencies derived by different authors to determine the geometric parameters of the working tool of the CPT mill, to determine the deformation parameters of the CPT process. The proposed method allows to partially level the inaccuracy of the existing formulas. Optimization of the nature of the distribution of the amount of compression along the diameter along the deformation cone makes it possible to reduce the likelihood of such a defect as a scratch on the inner surface of a cold-rolled pipe. The influence of the calibration parameters of proportional reductions on the nature of the reduction distribution along the diameter along the cone of deformation has been studied. It was found that from the point of view of optimizing the distribution of compression along the diameter along the cone of deformation, it is most appropriate to use calibrations with a curvilinear generatrix of the profile of the working surface of the mandrel. Such calibrations have great opportunities for optimization and allow choosing the most acceptable deformation modes.
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References
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