EP 0316519 B1 19910529 - METHOD FOR MEASURING AND CORRECTING THE RAM ADJUSTMENT OF HIGH-SPEED PUNCHING PRESSES, AND CIRCUIT FOR CARRYING OUT THE METHOD
Title (en)
METHOD FOR MEASURING AND CORRECTING THE RAM ADJUSTMENT OF HIGH-SPEED PUNCHING PRESSES, AND CIRCUIT FOR CARRYING OUT THE METHOD
Publication
Application
Priority
DE 3739023 A 19871117
Abstract (en)
[origin: EP0316519A1] The rams employed here serve for the cutting, punching, bending and/or stamping of semifinished products or the like having high tolerance requirements. The ram should be adjusted as a function of the number of strokes and the actual value in each case for the depth of immersion of the ram is measured. For this purpose, use is made of a detector head (4) which has a plurality of induction loops and is guided with the ram stroke along a permanent magnet strip (1) which in its longitudinal extent is divided into a large number of alternating North-South poles. The induced voltage characteristic is taken off for each predetermined unit of displacement length via cosine and sine functions of the induction loops, and the amplitudes of the two functions are measured and evaluated at the turning point, to be precise in such a way that one of the amplitudes or the maximum neighbouring the amplitude measured at the turning point serves as reference voltage and the other amplitude gives the measured value. <IMAGE>
IPC 1-7
IPC 8 full level
G01B 7/00 (2006.01); B30B 15/00 (2006.01); B30B 15/18 (2006.01)
CPC (source: EP US)
B30B 15/0041 (2013.01 - EP US); Y10T 83/141 (2015.04 - EP US)
Designated contracting state (EPC)
CH DE FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0316519 A1 19890524; EP 0316519 B1 19910529; DE 3739023 A1 19890524; DE 3739023 C2 19930805; DE 3863057 D1 19910704; JP H01156601 A 19890620; US 4890468 A 19900102
DOCDB simple family (application)
EP 88113357 A 19880817; DE 3739023 A 19871117; DE 3863057 T 19880817; JP 24728288 A 19880930; US 25816488 A 19881014