Turbomachine blade wall`s cooling channel forming method, involves piercing wall to make hole by using laser, and forming indentation in wall to form diffusion portion by using electro-erosion electrode

摘要

#CMT# #/CMT# The method involves piercing a wall (3) to make a hole (7) by using a laser. An indentation is formed in the wall to form a diffusion portion (9) by using an electro-erosion electrode (20), where a tip of the electrode is in the form of a cone with its conical surface presenting a flat (26). The recess is formed by orienting the axis of the cone so that it is parallel to an axis of the hole, where the axis of the hole is preferably offset towards an outside surface of the wall, and the axis of the cone does not intersect the flat. The wall is preferably pierced by a laser in order to make the hole. #CMT# : #/CMT# Independent claims are also included for the following: (1) a wall component comprising an inside surface (2) a hollow turbo machine blade comprising a wall component (3) a turbo machine comprising a hollow blade (4) an electrode for forming an indentation in a wall, comprising a tip. #CMT#USE : #/CMT# Used for forming a cooling channel in a wall of a hollow blade of a turbo machine. #CMT#ADVANTAGE : #/CMT# The wall is pierced to make the hole by using the laser, thus making it possible to form the cooling channel in the wall more quickly and at lower cost since laser piercing techniques are much faster and less expensive. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a section of a wall component. 1 : Wall 3 : Inside surface 4 : Cooling passage 5 : Outside surface 6 : Channel 7 : Hole 9 : Diffusion portion 11 : Orifice 12 : Lip 20 : Electro-erosion electrode 26 : Flat.