BENDING DIE AND METHOD OF ITS MANUFACTURE Russian patent published in 2017 - IPC B21D37/20 B21D5/01 B21D7/00 

FIELD: metallurgy.

SUBSTANCE: manufacture the blanks for the punch and/or matrix die from the martensitic steels off-gage wastes by cutting the plates on the laser device. The blanks are formed by the package of plates with the thickness of not less than the stamped product bending length. The blank for the matrix die contains at least one plate more, than the blank for the punch. In plates using the conductor, in the bending stress concentration areas under the influence of longitudinal forces, perform the mounting holes, and at the ends - the profiles, adequate to the corresponding bending product shape cross section, taking into account the clearance between the punch and the matrix die equal to the thickness of stamping product. Then the plates are connected into the packages by the tightening bolts through the mounting holes with the interference and provide the processing of the punch and/or matrix die blanks with the elements of its connection to the corresponding upper and lower plates of the bending die into the final size, bringing of the working surfaces to conform the stamped product bending shape and its subsequent aging.

EFFECT: reliability of the bending die is increased.

12 cl, 3 dwg