DEVICE AND METHOD FOR PLASTIC FORMING

DEVICE AND METHOD FOR PLASTIC FORMING

PROBLEM TO BE SOLVED: To provide a new device and method for plastic forming, because by the conventional plastic forming method, namely ECAP method, shearing force can be applied only once per each forming procedure due to press-fitting of forming material into a die and plastic forming is repeated...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: TAKAHARA HIDEFUSA, ICHINOSE KAZUO, FUJIKURA NOBUO, NIWA NAOKI
Format: Patent
Sprache:eng
Schlagworte:
AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL
CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL
METALLURGY
PERFORMING OPERATIONS
PUNCHING METAL
TRANSPORTING
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To provide a new device and method for plastic forming, because by the conventional plastic forming method, namely ECAP method, shearing force can be applied only once per each forming procedure due to press-fitting of forming material into a die and plastic forming is repeatedly required by changing the direction of the forming material to obtain a distortion-accumulated isotopic crystal, which requires complicated operation. SOLUTION: When plastic forming is carried out by forcibly flowing the forming material 35 in a flow path 34 of a cylindrical container, multiple bends 37, 38 are formed in the flow path to apply shearing force multiple times to the forming material at the bends. Differently from the conventional ECAP method, multiple bends give shearing force multiple times to the forming material by one action of press-fitting of the material and improve efficiency of distortion generation.