PhD Research Project: Analysis and implementation of new techniques for measuring temperatures duri

In all machining operations for chip removal, there is a series of physical magnitudes that determine the life of the cutting tool. Among these magnitudes some are easily controlled during machining (cutting speed, feed, tool, ...), but others must be predicted or measured (cutting and advancing forces, temperature, plastic deformations, vibrations) all these variables influence to a greater or lesser extent in the useful life of the cutting tool and in the quality of the surface finish. It is therefore very interesting to determine empirically and analytically, the type of correlations that are established between the two types of variables and the effect of these in the useful life of the tool. The high performance machining group has extensive experience in the measurement and simulation of these processes, but is still far from being able to predict the useful life of a tool and / or determine the conditions in which it must work to extend its life of work as much as possible without losing profitability / quality during the cutting process.

The technological objective is to i) analyse and implement new temperature measurement techniques and heat fluxes that complement the existing ones using measurement techniques with infrared cameras, pyrometers embedded with optical fiber and thermocouples and ii) the use of the obtained results to establish correlations between the temperature and other mechanical magnitudes, being of special relevance the useful life of the tool and measures of ruggedness of the mechanized piece.

Goals

• To analyse and develop temperature measurement techniques and heat fluxes in the different parts of the cut (tool, chip, piece) during the machining, including measurement techniques with infrared cameras, pyrometers embedded with optical fiber and temopars.
• Study and determination of correlations between temperature + heat fluxes and other mechanical magnitudes related to the cutting process (cutting forces, roughness, end of life)
• Development of a device to determine the emissivity of different common materials in the world of machining (steels, titanium alloys, hard metals) depending on the temperature.
• Development of action protocols to make "Digital Image Correlation" (DIC) with high-speed infrared images in combination with images in the visible range
• Development of empirical, analytical and finite element models to describe the oxidation process that occurs in metals and determination of the effect of oxidation on the finish of the machined parts and the useful life of the cutting tools.

Position details

Organization: Mondragon Unibertsitatea. Faculty of Engineering.

Research area: High Performance Machining.

Researcher profile: First Stage Researcher (R1).

Type of contract: Research contract - Temporary.

Job status: Full time.

Location: Arrasate-Mondragon, Gipuzkoa, SPAIN

PhD supervisor: Pedro J. Arrazola, MONDRAGON Unibertsitatea (pjarrazola@mondragon.edu)

PhD co-supervisor: Daniel Soler, MONDRAGON Unibertsitatea (dsoler@mondragon.edu)

Funding information

https://www.mondragon.edu/en/research-transfer/engineering-technology/aids-scholarships