PRESS WORKING OF STEEL PLATE AND THE LIKE

PURPOSE:To obtain an object microscopic hole diameter exactly and correctly without dropping the high productivity of a press in the same metallic mold, by compress-working a hole obtained by blanking a steel plate, and reducing its hole diameter. CONSTITUTION:The outside circumference of a hole 5 f...

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Bibliographische Detailangaben
Hauptverfasser:	YOSHIDA KOUTAROU, ABE YOSHIHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	FORGE FURNACES FORGING HAMMERING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL PERFORMING OPERATIONS PRESSING METAL PUNCHING METAL RIVETING TRANSPORTING WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain an object microscopic hole diameter exactly and correctly without dropping the high productivity of a press in the same metallic mold, by compress-working a hole obtained by blanking a steel plate, and reducing its hole diameter. CONSTITUTION:The outside circumference of a hole 5 formed by performing blanking to a steel plate is compress-worked. As a result, it is possible to obtain a hole diameter phialpha3 smaller than a hole diameter phiD5 formed by the previous process. As necessary, this compress-working is repeated, and an object hole diameter is obtained. According to this method, a microscopic hole diameter exceeding a press working limit can be worked with high productivity in a state that high productivity of a press has been utilized.