JPS6210771B

PURPOSE:To improve yield of punching by a method wherein the arrangement of balnks in the punching step is so set that the feed cross-support width and edge cross-support width become zero. CONSTITUTION:In the case of machining universal joints for use in shaft couplings of steering wheels of automo...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	NAKANO KOJI, KATANAGA KENJI
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING BRAKES CLUTCHES COMBINED OPERATIONS COUPLINGS FOR TRANSMITTING ROTATION ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MACHINE TOOLS MECHANICAL ENGINEERING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METAL-WORKING NOT OTHERWISE PROVIDED FOR OTHER WORKING OF METAL PERFORMING OPERATIONS PUNCHING METAL THERMAL INSULATION IN GENERAL TRANSPORTING UNIVERSAL MACHINE TOOLS WEAPONS WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL
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Beschreibung
Zusammenfassung:	PURPOSE:To improve yield of punching by a method wherein the arrangement of balnks in the punching step is so set that the feed cross-support width and edge cross-support width become zero. CONSTITUTION:In the case of machining universal joints for use in shaft couplings of steering wheels of automobiles, the arrangement of blanks in a punching step is so positioned that the feed cross-support width and edge cross-support width become zero. Since the punched blanks 2 have sags, burrs and the like, they are corrected in shape during a coining step. The portions to be coined are portions B, B' for the first coining step (I) and portions E, E', F, F', G for the second coining step (II), all the portions being free to be separated and united. From the viewpoint of the shape of the product, the other portions than the above-mentioned portions need not be coined. By this method, a coil width smaller than the conventional blank width will suffice. Further, the cutting margins of the portions A, B are reduced and the yield in the blank 1 can be improved.