Abstracts Book - IMRC 2018

• SE1-P011
APPLICATION OF STRUCTURAL ALUMINUM IN THE
MANUFACTURE OF A TOOL FOR THE REMOVAL OF BEARINGS
FROM THE TURBOFAN JT8D ENGINE AVAILABLE IN THE ESIME
UPT IPN
Victor Manuel Sauce 1 , Marco A. García 1 , Antonio Mosqueda 1
1 ESIME TICOMAN, Ing. Aeronáutica, Mexico.
The aluminum of structural application was selected for the manufacture of the
extraction tool of bearing No. 1 of the JT8D turbofan engine. The effort required
to extract the bearing with its evaluation was determined by applying the
analytical method and through the finite element, ANSYS. The tool is made of
AISI 4140 steel with a yield strength of 95,000 lb / in2 [1], greater than the
maximum effort that the hook supports. Finite element results are 9,380 ksi,
(9380 lb / in2), located at the corners and below the yield strength of the
material. The aluminum 6061 T6 available in the national market was used,
various thermal treatments were applied in order to increase the hardness. The
T6 treatment represents the maximum resistance for this alloy [2] and
treatments were applied at different temperatures. The results obtained are
discussed, with the treatment at 530 ° C for 18 hours, the hardness increases
from 9 to 10 points, as well as the size of precipitates and grain. The hardness
of the aluminum is provided by the precipitates due to the reheating below the
solididus line that causes the diffusion and homogenization of the same [3]. The
tests of tension or maximum resistance confirm that the aluminum in its quality
of T6 presents the greater resistance. The increase in hardness with reheating
does not increase the resistance in tension. The extraction work performed by
the hook of the tool is tension and cut and the increase in hardness does not
increase these properties. The surface hardening of this alloy with the anodizing
process gives good results and will be improved with the application of a more
rectified current.
Bibliography.
[1] Machinering Handbook., Propierties, treatment and testing materials, pp
433. 26 th Edition. New York, 2000.
[2] C. R. Brooks, Heat treatment, Structure and properties of Nonferrous Alloys,
American Society for Metals. 1982
[3] Introducción a la metalurgia física., Sidney H. Avner., McGraw Hill., 1984.[4]
American Standard Testing Materials (ASTM) , Norma E8M-96,