| 摘要 |
FIELD: methods of straightening of blanks and parts; applicable in manufacture of hydraulic cylinders, bodies plungers of oil well sucker-rod pumps and other precision long components of oil, chemical and power engineering industries. SUBSTANCE: method of control of straightening process includes continuous measurement of deformation since the beginning of loading, calculation of the value of residual deformation, comparison of residual deformation value with the required value of residual deformation, and, if these values are similar, the straightening process is discontinued. Additionally, prior to the beginning of loading, deviation of blank actual shape from the preset one in 5-12 controlled sections spaced over the length of the section to be straightened, and obtained results are used to determine the value of the required correction of blank shape. In course of straightening, displacement of those sections of the blank are continuously measured, and by the values of displacement, the actual deviation of the blank shape, from the initial one, is determined. The obtained deviation is compared with shapes characteristic for elastic and plastic deformation. Value of residual deformation is calculated and compared with the value of the required correcting of blank shape. In this case, the value of the required correction and parameters of the elastic and plastic deformation are calculated with the use of induction coefficients by the offered formulas. In one version of the offered method embodiment, for straightening the axisymmetric blanks, the installed for straightening, prior to loading, is rotated round the axis to measure displacements in controlled sections, and average values in each section are taken as the positions characterizing the rectilinear shape of the blank and beginning of displacement readings. In the preferable version of the offered method embodiment, the shapes of the blank axis in elastic and plastic deformation are refined in the course of straightening by offered recurrent formulas. EFFECT: extended technological capabilities of the controlled method of straightening and provision of precise correction with respect to rigid blanks and articles. 3 cl, 1 dwg |
