METHOD FOR DETECTING ABNORMALITY OF PRESS DIE DEVICE OF THIN PLATE

PROBLEM TO BE SOLVED: To correctly detect any abnormality such as degradation and crack of a coating during the press forming in advance. SOLUTION: When a thin plate 5 is press-formed by the relative movement of a punch 1 and a die 2, it is determined that a die is abnormal if the elastic strain gen...

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Bibliographische Detailangaben
Hauptverfasser:	HIWATARI SHUNJI, SUZUKI NORIYUKI, KUWAYAMA TAKUYA
Format:	Patent
Sprache:	eng
Schlagworte:	MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL PERFORMING OPERATIONS PRESSES PRESSES IN GENERAL PUNCHING METAL TRANSPORTING WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To correctly detect any abnormality such as degradation and crack of a coating during the press forming in advance. SOLUTION: When a thin plate 5 is press-formed by the relative movement of a punch 1 and a die 2, it is determined that a die is abnormal if the elastic strain generated inside an objective die for measurement by the press-forming and measured by strain measuring means 11, 12 installed inside the objective die for measurement while at least one of the punch 1 and the die 2 is the objective die for measurement, exceeds a predetermined range, or is lower than the predetermined range. According to the present invention, a die surface can be repaired at an adequate timing, and troubles such as scuffing and breakage of the die can be avoided. COPYRIGHT: (C)2009,JPO&INPIT