EP 0172300 B1 19880803 - METHOD AND DEVICE FOR OBTAINING CLOSE WORK PIECE TOLERANCES IN FORGING PROCESSES, IN PARTICULAR IN ISOTHERMIC FORGING PROCESSES
Title (en)
METHOD AND DEVICE FOR OBTAINING CLOSE WORK PIECE TOLERANCES IN FORGING PROCESSES, IN PARTICULAR IN ISOTHERMIC FORGING PROCESSES
Publication
Application
Priority
CH 103584 A 19840302
Abstract (en)
[origin: US4601186A] A process and apparatus for achieving narrow workpiece tolerances in isothermal drop-forging, the relative movement of the two die halves (1, 2) in an xy plane perpendicular to the pressing direction z being measured and monitored by means of an optical measuring device (10, 11, 12, 14) or mechanical measuring device (14, 15, 16) and being corrected by means of a mechanical adjusting device (6, 17, 21, 23, 24, 25, 26) for one die half (2). A first workpiece is forged, and the divergence from the nominal value is measured, with the die halves (1, 2) closed, the die halves (1, 2) are opened, the first workpiece is removed, the position of one die half (2) is corrected, and a new workpiece is introduced and forged completely, without the workpiece having to be cooled and remeasured and without the die having to be cooled and reheated.
IPC 1-7
IPC 8 full level
B21J 5/00 (2006.01); B21J 13/00 (2006.01); B21J 13/02 (2006.01); B21K 31/00 (2006.01)
CPC (source: EP US)
B21J 5/00 (2013.01 - EP US); B21J 13/00 (2013.01 - EP US); B21K 31/00 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE FR GB LI SE
DOCDB simple family (publication)
EP 0172300 A1 19860226; EP 0172300 B1 19880803; DE 3564085 D1 19880908; JP S60206548 A 19851018; NO 160119 B 19881205; NO 160119 C 19890315; NO 850822 L 19850903; US 4601186 A 19860722
DOCDB simple family (application)
EP 85100918 A 19850130; DE 3564085 T 19850130; JP 3896985 A 19850301; NO 850822 A 19850228; US 70151985 A 19850214