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Alternative Temperature Control of Closed Forging Dies Using Heat Pipes

Autoren:Behrens, B.-A.; Prüß, T.
Kategorie:Zeitschriften/Aufsätze (reviewed)
Veröffentlichung:Key Engineering Materials Vols. 651-653 (2015) pp 311-316; Trans Tech Publications, Switzerland


The temperature of forging dies has a high influence on the wear development of the tool surface. To reduce the thermal impact on tool life cooling lubricants are used in many manufacturing processes. They perform two functions: tool cooling and reduction of friction. Cooling lubricants must always meet these two requirements. Within this article the separation and the particular optimization of both functions is presented.As an alternative to a graphite-water-mixture, boron nitride is the medium of choice for lubrication purposes, since it features excellent lubricant properties. For a high wettability it is applied by electrostatic coating.As an alternative approach to removing heat from a forging die, the usage of heat pipes is for the first time investigated in this paper. These passive elements are able to transport heat without using external energy. They will be varied in form and volume. This cooling method will be qualified for the use in forging dies.