MANUFACTURING DEVICE FOR STEPPED HOLLOW GEAR

PURPOSE:To improve the accuracy of a product and to reduce the cost by forming small diameter and large diameter projecting parts on the mandrel arranged in opposition to a punch and arranging the tooth part forming part of a die on the outer periphery of the large diameter part of the mandrel. CONS...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	MIURA CHIYOJI, KOUNO MICHITOSHI, MAEDA TOSHIO
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING ENGINEERING ELEMENTS AND UNITS FORGE FURNACES FORGING GEARING GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HAMMERING HEATING LIGHTING MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES,RIVETS, BOLTS OR WHEELS MECHANICAL ENGINEERING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL PERFORMING OPERATIONS PRESSING METAL PUNCHING METAL RIVETING THERMAL INSULATION IN GENERAL TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	PURPOSE:To improve the accuracy of a product and to reduce the cost by forming small diameter and large diameter projecting parts on the mandrel arranged in opposition to a punch and arranging the tooth part forming part of a die on the outer periphery of the large diameter part of the mandrel. CONSTITUTION:A primary stock having large diameter part and small one is formed in advance by the pressing of punch and die from a round bar-like stock. The primary stock is formed in the stock W2 having large diameter part BII and small diameter part CII by the pressing action of punch 15 and die 12 and set between mandrel 28 and punch 38. In this case, the part contracting the diameter in two steps is provided on the mandrel 28, a recessed part 38a is arranged on the punch 38 as well and a tooth part forming part 37 is arranged on the die 35. The stock W3 is subjected to pressing and due to the metal of the stock W3 being sufficiently pushed into a gear A the product accuracy thereof is improved. The equipment cost is reduced because of the small load of the die and the product cost is reduced.