B - Operations – Transporting – 30 – B
Patent
B - Operations, Transporting
30
B
B30B 15/00 (2006.01) B21D 24/02 (2006.01) B21D 24/14 (2006.01)
Patent
CA 2077595
A hydraulic cushioning apparatus for a press having an upper and a lower die assembly (3, 9) for forming a sheet-like workpiece (6), including hydraulic cylinders (54) incorporated in one of the upper and lower die assemblies, and pressure pins (52) linked with the respective hydraulic cylinders. The pressure pins are reciprocable to apply a cushioning force (F) to the workpiece, in a pressing action of said die assemblies on the workpiece, so as to force the workpiece against the other die assembly. The apparatus is equipped with a hydraulic power supply device (72, 100, 117, 272) far delivering a pressurized fluid to the hydraulic cylinders (54). The power supply device is capable of changing an initial hydraulic pressure (P0) of the fluid to be applied to the hydraulic cylinders before the pressing action of said die assemblies.
Cette invention concerne un serre-flan hydraulique pour presse de façonnage de matériau en feuille (6) comportant un ensemble matrice et poinçon (3, 9), ledit serre-flan prenant la forme d'une série de vérins hydrauliques incorporés dans la matrice ou le poinçon et terminés par des chandelles de pression (52). € mouvement alternatif, les chandelles servent à appliquer une force (F) à la pièce à être façonnée par rapprochement de la matrice et du poinçon, ladite force servant à plaquer la pièce contre la matrice. L'objet de l'invention est équipé d'une source de puissance hydraulique servant à l'alimentation des vérins (54). Cette source est conçue de manière à pouvoir modifier la pression hydraulique initiale (P0) d'alimentation des vérins avant le serrage de la pièce entre la matrice et le poinçon.
Kirii Kazunari
Ono Tsutomu
Shinabe Masahiro
Gowling Lafleur Henderson Llp
Toyota Jidosha Kabushiki Kaisha
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