Blank holding mechanism for press blanking die

Abstract

Abstract PURPOSE: To give a tension to the work undergoing the blanking work, in order to obtain the stable blanked product even of a large size with good dimensional accuracy, by installing the protuberance in the stripper plate of the press blanking die, and the groove corresponding to this protuberance in the lower die. CONSTITUTION: When the press ram 5 is at the upper dead point, the bottom face A of the stripper plate 11 is held by the compression spring 12 at a position lower than the bottom face B of the punch 6. If the ram 5 goes down, the protuberance 10 of the stripper plate 11 first touches the work 1 and next is pushed into the hollow groove 14 of the lower die 8. Hereby, the work 1 is pulled to the left and the right, and its slack is straightened so as to keep the flat condition, while the punch 6 engages with the lower die 8 for executing the blanking work. According to this method, the distortion and the droop of the blanked product can be prevented. COPYRIGHT: (C)1981,JPO&Japio

Inventors

• 👤 Takeshi Ishii
• 👤 Yasunori Abe
• 👤 Kenji Yonekura

Bibliographic Details