FORMING METHOD FOR FLARING PART OF TUBE

PURPOSE:To enable smooth flare work by bending a rectangular metallic plate to tube shape and forming a tube by fitting jagged patterns at left and right ends to each other and forming holes in front of the end of the tube in longitudinal direction. CONSTITUTION:Left and right edges of a strip 6 are...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	OZASA TAKASHI
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING JOINTS OR FITTINGS FOR PIPES LIGHTING MEANS FOR THERMAL INSULATION IN GENERAL MECHANICAL ENGINEERING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL PERFORMING OPERATIONS PIPES PUNCHING METAL SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING THERMAL INSULATION IN GENERAL TRANSPORTING WEAPONS WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL
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Beschreibung
Zusammenfassung:	PURPOSE:To enable smooth flare work by bending a rectangular metallic plate to tube shape and forming a tube by fitting jagged patterns at left and right ends to each other and forming holes in front of the end of the tube in longitudinal direction. CONSTITUTION:Left and right edges of a strip 6 are rolled by a roll 7 and chamfered, and holes 9 for pilot and also for positioning are made at a fixed interval by a piercing punch 8. Next, the strip is cut at the position of the holes 9 and rectangular plates 1 having jagged fitting patterns on both ends in longitudinal direction are formed. The rectangular plate 1 is held between a bending die 11 having a semicircular concavity 10 and a cylindrical mandrel 12 and bent to inverse U-shape. Then, a tube is formed by pressing with a pressing device 17 from lower right, lower left and below. At the same time, jagged fitting patterns 2 are fitted to each other and connected. Further, it is pressed from all sides with a finishing pressing device 19 having a circular concavity. The holes 9 are used as notches in flare working. This tube is flared.