Measurement of heat flux and heat transfer coefficient due to spray application for the die casting process

A. S. Sabau, E. C. Hatfield

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Lubricant spray application experiments were conducted for the die casting process. The heat flux was measured in situ using a differential thermopile sensor for three application techniques. First, the lubricant was applied under a constant flowrate while the nozzle was held in the same position. Second, the lubricant was applied in a pulsed, static manner, in which the nozzle was held over the same surface while it was turned on and off several times. Third, the lubricant was applied in a sweeping manner, in which the nozzle was moved along the die surface while it was held open. The experiments were conducted at several die temperatures and at sweep speeds of 20, 23, and 68cm/s. The heat flux data, which were obtained with a sensor that was located in the centre of the test plate, were presented and discussed. The sensor can be used to evaluate lubricants, monitor the consistency of die lubrication process, and obtain useful process data, such as surface temperature, heat flux, and heat transfer coefficients. The heat removed from the die surface during lubricant application is necessary for (a) designing the cooling channels in the die, i.e. their size and placement, and (b) performing accurate numerical simulations of the die casting process.

Original languageEnglish
Pages (from-to)1307-1316
Number of pages10
JournalProceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture
Volume221
Issue number8
DOIs
StatePublished - 2007

Keywords

  • Die casting
  • Die lubrication
  • Heat flux measurement
  • Heat flux sensor
  • Heat transfer
  • Spray cooling

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