STAMP FOR OPEN VOLUME STAMPING WITH AN EXPANDING FLASH BRIDGE Russian patent published in 2021 - IPC B21J13/02 B21K1/10 

FIELD: metal processing.

SUBSTANCE: invention relates to the processing of metals by pressure; it can be used for flat stamping of step forgings. The stamp contains the upper and lower halves with gravures forming the preliminary and final streams. The final stream is provided with a flash gutter, which is made with a magazine and expanding flash bridges. Flash bridges are made with a connector and have a one-sided profile of a rectilinear form. The shape of the profile is determined for each stage of forging, taking into account the equality of the volume of the metal of the stage, displaced from the final stream into the flash at the last stage of additional stamping, and the volume of the flash bridges adjacent to the stage. The initial height of the flash bridges is equal to the thickness of the flash, taken into account the press force.

EFFECT: reduced deformation force and the metal consumption rate and an increase in the durability of the equipment.

2 cl, 3 dwg