SE358720

1290588 Drawing cross-rifled tubing SUMITOMO METAL INDUSTRIES Ltd 26 June 1970 [2 July 1969] 31170/70 Headings B3A and B3P [Also in Division F4] In a method of making a vapour generating tube, a tube 3 is drawn over a rotary plug 11 pro- vided with spiral lands 12. The tube 31 so formed is then draw...

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Bibliographische Detailangaben
Hauptverfasser:	TANAKA M,JA, NAKAMURA H,JA
Format:	Patent
Sprache:	eng
Schlagworte:	AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL BLASTING DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEAT EXCHANGE IN GENERAL HEATING JOINTS OR FITTINGS FOR PIPES LIGHTING MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS,WHEELS, RINGS, BARRELS, BALLS MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING MEANS FOR THERMAL INSULATION IN GENERAL MECHANICAL ENGINEERING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METHODS OF STEAM GENERATION PERFORMING OPERATIONS PIPES PUNCHING METAL STEAM BOILERS STEAM GENERATION SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING THERMAL INSULATION IN GENERAL TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	1290588 Drawing cross-rifled tubing SUMITOMO METAL INDUSTRIES Ltd 26 June 1970 [2 July 1969] 31170/70 Headings B3A and B3P [Also in Division F4] In a method of making a vapour generating tube, a tube 3 is drawn over a rotary plug 11 pro- vided with spiral lands 12. The tube 31 so formed is then drawn over either a rotary plug (17) having spiral lands (16) of the opposite hand to the lands 12, Fig. 9 (not shown), or over a fixed plug 19, to form a series of spirally arranged, parallelogram shaped projections 20. The tube is drawn on a chain type cold-drawing bench by a carriage (4), which is provided with a pawl (5) for engagement with an endless chain (6), Fig. 5 (not shown).