APPARATUS FOR DRAWING TUBES WITH INNER STEPPED SURFACE Russian patent published in 1997 - IPC

Abstract RU 2082516 C1

FIELD: plastic metal working. SUBSTANCE: apparatus includes housing, die, stepped mandrel with stopper, mechanism for pulling blank and axial hydraulic drive of die. Housing has stepped cavity and longitudinal grooves. Pulling mechanism includes stepped tie rods movably supporting stopper of mandrel and axial hydraulic drive of die. Guiding flange is stationary secured to tie rods. EFFECT: enhanced efficiency. 1 dwg

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RU 2 082 516 C1

Authors

Gajvoronskij A.T.

Gajvoronskij A.A.

Dates

1997-06-27—Published

1994-08-09—Filed