Die cushion controller

A die cushion controller (5) uses position control to position die cushion members (6) for placement of a metal sheet (3). A pressing process starts and the upper die (1) is lowered. When a position detector (7) detects a position at which the upper die touches the sheet metal, the die cushion contr...

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Bibliographic Details
Main Authors FUJIBAYASHI KENTARO, TSUJIKAWA KEISUKE, HISHIKAWA TETSUO, HIROSE NOBORU
Format Patent
LanguageChinese
English
Published 19.03.2008
Subjects
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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Summary:A die cushion controller (5) uses position control to position die cushion members (6) for placement of a metal sheet (3). A pressing process starts and the upper die (1) is lowered. When a position detector (7) detects a position at which the upper die touches the sheet metal, the die cushion controller switches over from position control to pressure control and applies a preset pressure to the sheet metal. When the position detector detects that the upper die has risen to a preset position, the die cushion controller clears the positional deviation accumulated in position control to zero, then moves the die cushion members to preset positions and holds them there.
Bibliography:Application Number: CN200510116822