INCREASING THE ACCURACY OF DETERMINING THE Q-FACTOR IN CONTROL SECTIONS OF THE STAN DEFORMATION CONE COLD PILGER ROLLING PIPE
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Abstract
The influence of the method for calculating the initial values of the geometric parameters of the deformation cone on the accuracy of determining the nature of the distribution of the Q-factor along the deformation cone of the cold rolling mill mill is investigated as an important factor that creates the necessary deformation conditions that ensure the formation of the required texture of pipes made of Ti-3Al-2.5V alloy. The research methods were based on the existing dependence describing the effect of true cross-section compressions along the deformation cone on the value Q-factor in this section, as well as a number of dependencies, derived by different authors to determine the initial values of the geometric parameters of an arbitrary section of the deformation cone before the double stroke of the stand of the KhPT mill. Within the framework of this, a “direct” method of determining the initial values of the geometric parameters of an arbitrary section of the deformation cone, based on the interpolation of the calibration data of the tool of the cold rolling mill, has been proposed. The algorithm of the “direct” method for calculating the initial values of the geometric parameters of the deformation cone makes it possible to more accurately determine both these values and the accuracy of the Q-factor when using other methods (according to the formulas of Ya.E. Osada, B.M. Rogov and a simplified formula for determining the amount of reduction) for determining the considered deformation parameters for calculating the value of the Q-factor.
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References
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