MANUFACTURE OF TORQUE OUT BOLT

PURPOSE:To make a bolt to good shape free from tip drooping of threaded part and lengthen life of a die in working of a torque cut bolt by making projected part of a rolling die combined shape of specified angle having gentle slope in the threaded side. CONSTITUTION:In a rolling die that forms the t...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	KOIZUMI KATSUMI, IMAI YOSHIO
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS ORMACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS,CLIPS, WEDGES, JOINTS OR JOINTING ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS,WHEELS, RINGS, BARRELS, BALLS MECHANICAL ENGINEERING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL PERFORMING OPERATIONS PUNCHING METAL THERMAL INSULATION IN GENERAL TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	PURPOSE:To make a bolt to good shape free from tip drooping of threaded part and lengthen life of a die in working of a torque cut bolt by making projected part of a rolling die combined shape of specified angle having gentle slope in the threaded side. CONSTITUTION:In a rolling die that forms the thrraded part 1 and cut groove 2 of a torque cut bolt, angle of inclination alpha of threaded side of the tip of a groove forming projection 6 adjacent to the threaded part 5 is made about 40 deg., and angle of inclination beta of opposite side is made about 10 deg., and alpha+beta is made about 50 deg.+ or -3 deg.. In the case the rise of the end of the threaded part 5 becomes proper amount and life of the die becomes longest.