INFLUENCE OF UPSETTING OPERATION ON THE CLOSURE OF THE INGOTS AXIAL DEFECTS

Докладчик

Марков Олег Евгеньевич

Марков Олег Евгеньевич

  • Должность: доц.
  • Звание, степень: к.т.н.
  • Организация: Донбасская государственная машиностроительная академия
  • Подразделение: кафедра "Обработка металлов давлением"
  • Город: Краматорск
  • Направление кузнечно-штамповочное производство, моделирование, поковка, слиток


    Аннотация

    A stress-strain state and a resize of an axial defect during upsetting have been investigated in the article. Theoretical research based on a FEM has been conducted. The upsetting of cylindrical steel workpieces which had the axial defect equal to 10 % of the workpiece diameter has been simulated. Upsetting has been carried out by flat, concave and convex plates (solid or with hole). The result of the studies showed that the main influence on the workpiece shape had a ratio of dimensions. The maximal closure of the axial defect provides upsetting by flat solid plates of the workpieces with ratio H / D < 1.5. Upsetting by concave plates does not provide the closure of axial defects. Convex plates provide the uniform stress-strain state along the workpiece cross section. The hole in the plates increases the non-uniformity of strain distribution and also does not provide the axial defects closure.

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