EP 0542813 A4 19930915 - APPARATUS AND METHOD OF INDUCTION-HARDENING MACHINE COMPONENTS WITH PRECISE POWER OUTPUT CONTROL
Title (en)
APPARATUS AND METHOD OF INDUCTION-HARDENING MACHINE COMPONENTS WITH PRECISE POWER OUTPUT CONTROL
Publication
Application
Priority
- US 9105285 W 19910725
- US 69334391 A 19910430
- US 56339890 A 19900806
Abstract (en)
[origin: WO9203026A1] An induction hardening machine for contour hardening of machine components such as gears includes a phase angle detector circuit (112) which produces a pulse for each corresponding detection of a predetermined phase angle of an AC signal. A start switch (SW2) and the pulse produced by the phase detector provide inputs to a circuit (116) which requires concurrence of the pulse and activation of the switch before a predetermined width signal pulse is produced. The predetermined width signal pulse activates power switching devices (114) to supply a predetermined power signal to an RF generator (120) coupled to an induction heating coil (128). Precise induction heating is accomplished via precise control of power input to the RF generator (120).
IPC 1-7
IPC 8 full level
C21D 1/10 (2006.01); C21D 9/32 (2006.01); H05B 6/06 (2006.01); H05B 6/10 (2006.01); H05B 6/14 (2006.01); H05B 6/40 (2006.01)
CPC (source: EP)
H05B 6/06 (2013.01); H05B 6/405 (2013.01)
Designated contracting state (EPC)
AT BE CH DE ES FR GB IT LI NL SE
DOCDB simple family (publication)
WO 9203026 A1 19920220; AT E136721 T1 19960415; AU 649062 B2 19940512; AU 8309291 A 19920302; BR 9106736 A 19930706; CA 2046851 A1 19920207; CA 2046851 C 19950307; DE 69118699 D1 19960515; DE 69118699 T2 19960829; EP 0542813 A1 19930526; EP 0542813 A4 19930915; EP 0542813 B1 19960410; JP 2885511 B2 19990426; JP H06500150 A 19940106; KR 970011547 B1 19970711; RU 2113773 C1 19980620
DOCDB simple family (application)
US 9105285 W 19910725; AT 91914109 T 19910725; AU 8309291 A 19910725; BR 9106736 A 19910725; CA 2046851 A 19910711; DE 69118699 T 19910725; EP 91914109 A 19910725; JP 51338491 A 19910725; KR 930700353 A 19930206; RU 93005002 A 19910725