Spark erosion machining process, for machining metallic wall zone, involves holding electrode in machining position on programmed trajectory based on voltage between electrode end and wall compared to threshold voltage to machine wall zone

摘要

#CMT# #/CMT# The method involves bringing an electrode (11) closer to a zone of a metallic wall of a part (1). An electrode end and the zone are dipped in dielectric fluid (25). Displacements of the electrode along trajectories, programmed based on machining profile, are controlled. The electrode is held in a machining position on the trajectory based on a voltage between the end and wall, compared to a threshold voltage, to machine the zone. #CMT# : #/CMT# An independent claim is also included for a spark erosion machining device for machining a zone of a metallic wall of a part. #CMT#USE : #/CMT# Used for machining a zone of a metallic wall of a part (claimed) in a hostile environment such as nuclear reactor to take samples or test pieces for periodically controlling certain characteristics of the metallic parts to know its behavior in the prolonged radiation and its rate of embrittlement. #CMT#ADVANTAGE : #/CMT# The method is applied to all installations in a hostile environment in which the remote machining of metallic part should be carried out. The method can be directly implemented on operation sites, without requiring any specific and encumbering installations. The method provides high flexibility for utilization and intervention in less accessible zones. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a spark erosion machining device. 1 : Part 10 : Spark erosion machining device 11 : Electrode 12 : Robotic arm 25 : Dielectric fluid.