Wyniki wyszukiwania - BazTech

Ograniczanie wyników

1 Journal of Achievements in Materials and Manufacturing Engineering

1 2007

Znaleziono wyników: 1

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Heat teransfer coefficient for F.E. analysis in the warm forging process

Kang J. H., Lee K. O., Kang S. S.

Journal of Achievements in Materials and Manufacturing Engineering

2007

Vol. 20, nr 1-2

367-370

Purpose: The purpose of this paper is to obtain suitable convection and contact heat transfer coefficient for one-time finite element analysis in the warm forging process. Design/methodology/approach: To do this, the temperature of the tool used in the operation was measured with a thermocouple and repeated finite element analysis (FEA) was performed using the experimentally calculated contact at cooling heat transfer coefficient. Also the surface temperature of the active tool was obtained by comparing the measurement and analysis results and finally the contact heat transfer coefficient for one-time FEA was completed by comparing the surface temperature between the repeated FEA and one-time FEA results. Findings: The acceptable convection heat transfer coefficients are from 0.3 to 0.8 N/mm/s/K and the contact heat transfer coefficient of 6-9 N/mm/s/K is appropriate for the warm forging process with flow-type lubrication conditions. Practical implications: A comparison of the temperatures from the repeated and one-time analysis allows an optimum contact heat transfer coefficient for the one time finite element analysis to be determined. Originality/value: several studies have been conducted with diferent conditions such as applied pressure and kind of lubricant, but no research has been conducted concerning the convection heat transfer coefficient in the warm forging process. Also, comparative analysis concerning the reason for difference between experimentally determined contact heat transfer coefficient and practically adapted one has been conducted, yet.