FIELD: metallurgy.
SUBSTANCE: when replacing the upper stamp at the front end of the bending press punch, the upper stamp is inserted and placed below the punch and removed under the punch using a carriage on which the upper stamp is placed. The carriage moves between two matrix elements in the direction along the longitudinal axis of the punch. At that, the carriage is moved to the position under the punch and removed from the punch by means of steel pipe extension device installed on the bending press. The attachment and detachment of the upper stamp from the front end of the punch is performed in a state, in which the upper stamp block is raised and brought into contact with the front end of the punch.
EFFECT: it is possible to quickly and safely change the stamp which enables to improve production capacity of steel pipes.
7 cl, 7 dwg
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