Patent ID: 6520075
Filing Date: 2003-02-18
Classification: B30B

Abstract:
A double action hydraulic press, said double action hydraulic press having a plurality of slides and a separate drive source for each of said slides, comprising:an outer slide, which is guided in a freely rising and falling manner by an outer slide guide provided on a column; an inner slide, which is guided in a freely rising and falling manner by an inner slide guide provided inside said outer slide; an outer slide fluid operated drive cylinder carried on a press crown part, said outer drive cylinder having an end of a rod connected to said outer slide for driving said outer slide; an inner slide fluid operated drive cylinder carried on said outer slide, said inner slide drive cylinder having an end of a rod connected to said inner slide for driving said inner slide; a die plate detachably mounted to a lower surface of said outer slide; at least one push pin supported by a sliding member on said die plate for supporting said at least one push pin in a freely rising and falling manner on said die plate, and a spring disposed between a collar part on said inner slide and an upper surface of said die plate; and an equalize shaft passing through said outer slide and said inner slide, said equalize shaft carrying a pinion at each of two opposite ends of said equalize shaft, said equalize shaft being supported by a bearing carried on said inner slide; each said pinion engaging racks carried on said outer slide.