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1. (US20190022743) A METHOD OF FORMING DUST-REMOVAL HOLES FOR A TURBINE BLADE, AND AN ASSOCIATED CERAMIC CORE

Office : United States of America
Application Number: 16077171 Application Date: 10.02.2017
Publication Number: 20190022743 Publication Date: 24.01.2019
Publication Kind : A1
Prior PCT appl.: Application Number:PCTFR2017050310 ; Publication Number: Click to see the data
IPC:
B22C 9/10
F01D 5/18
B PERFORMING OPERATIONS; TRANSPORTING
22
CASTING; POWDER METALLURGY
C
FOUNDRY MOULDING
9
Moulds or cores; Moulding processes
10
Cores; Manufacture or installation of cores
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01
MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
D
NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
5
Blades; Blade-carrying members; Heating, heat-insulating, cooling, or antivibration means on the blades or the members
12
Blades
14
Form or construction
18
Hollow blades; Heating, heat-insulating, or cooling means on blades
CPC:
B22C 9/10
F01D 5/187
F05D 2230/211
F05D 2260/607
Applicants: SAFRAN
Inventors: Adrien Bernard Vincent ROLLINGER
Mirna BECHELANY
Priority Data: 1651134 12.02.2016 FR
Title: (EN) A METHOD OF FORMING DUST-REMOVAL HOLES FOR A TURBINE BLADE, AND AN ASSOCIATED CERAMIC CORE
Abstract: front page image
(EN)

A ceramic core used for fabricating a hollow turbine blade for a turbine engine using the lost wax casting technique, the blade including calibrated dust-removal holes emanating from a top of at least one cavity and opening out into a bathtub of the blade, wherein each of the calibrated dust-removal holes is formed in a core portion of height that is determined to be sufficient to guarantee mechanical strength, the core portion including a through orifice of axis perpendicular to a longitudinal axis of the calibrated dust-removal hole and defining on either side of the through orifice firstly a core cylinder having a determined diameter corresponding to the dust-removal hole that is to be formed, and secondly a remaining core volume that is to be plugged after casting, such that the calibrated dust-removal hole is obtained without drilling and without using connection rods.


Also published as:
FR3047767CA3014022CN108698117EP3414031BR112018016416WO/2017/137709