PRESS FOR FORMING PIPES OF LARGE DIAMETER

Invention relates to the press for forming pipes of large diameter of the sheets into U-shaped cylindrical billet with the slit, which consists of several gap presses straight arranged in one row, which corresponds to the length of molded pipes of large diameter, each of which includes lower tool an...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	SCHIFFERS HANS GUENTER
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR FLUID-PRESSURE ACTUATORS FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS FORGE FURNACES FORGING HAMMERING HEATING HYDRAULICS OR PNEUMATICS IN GENERAL LIGHTING MECHANICAL ENGINEERING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL PERFORMING OPERATIONS PRESSING METAL PUNCHING METAL RIVETING SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	Invention relates to the press for forming pipes of large diameter of the sheets into U-shaped cylindrical billet with the slit, which consists of several gap presses straight arranged in one row, which corresponds to the length of molded pipes of large diameter, each of which includes lower tool and upper tool performing vertical reciprocating travel with the help of hydraulic cylinders. Hydraulic cylinders are made as the cylinders of fast motion with an auxiliary piston in the form of a rod directed in the cylinder housing located in the centre on or in the main piston of larger diameter, and having channels for bringing the pressure means to the piston surface of auxiliary piston, and also from the annular surface of the main piston without auxiliary piston. The invention provides for reduction of overall dimensions of the press and reduction of oil consumption.