Papers by Author: Manuel Sánchez-Carrilero

Abstract: Project Based Learning techniques have given rise to other learning techniques as Research Works Based Learning (RWBL). This technique is especially interested in the teching-learning process of Materials Processing Technologies related disciplines. This work reports on the results of the application of RWBL techniques in a subject of the Cadiz University’s Master in Manufacturing Engineering: Engineering of Non-Conventional Materials Removing Processes. Proposed research works have been designed on the basis of a classic research paper structure: Introduction, State of the Art, Experimental Procedure, Results, Discussion and Conclusions. These proposed works were focused on a comparative analysis of different machining processes, mainly, electro-discharge machining, abrasive waterjet machining and high speed machining. This experience can be considered highly successful because the 100% of the students reached the learning objectives of the subject.

Abstract: In the last decades, technologically innovative processes performed in advanced materials such as Carbon Fibre (CF) and Metal Matrix Composites (MMC) have continuously increased because of these materials find increasingly applications in the most of the industrial sectors, particularly in aeronautical industry. This is caused by their excellent relationship weight/mechanical properties. Although there is a high trend to apply and develop non-conventional technologies and methods for machining CF and MMC, other common machining processes are commonly applied for working these materials. Thus, in aeronautical industry, mechanical drilling processes are usually applied for preparing the manufactured elements to be assembled. However, drilling of CF based materials can carry on troubles related to a loss of surface finishing quality and/or quick and high tool wear. This work reports on the results about an evaluation process of the surface quality of drilled CF samples as a function of the cutting conditions and the tool materials.

Abstract: Manufacturing performance improvement must take into account energetic, environmental and economic considerations. Thus, when intermediate manufacturing processes are avoided, that performance is improved from the cited viewpoints. In the aeronautical industry, pre-shaped elements of UNS A92024 alloy based structural elements are machined in T3 temper state previously to be thermally treated to reach an O state in order to facilitate its posterior plastic forming process. In this work, a comparative study on the dry turning of UNS A92024 alloy in both states has been achieved in order to analyze the possibilities of eliminating the thermal treatment process, so improving the three above commented considerations. This study has been carried out on the basis of the analysis of surface finish and cutting tool wear.

Abstract: Computer-Aided Learning is currently applied for improving educational methods in order to reach teaching objectives in experimental fields, which are in a continuous renovation process. So, handling new machines learning cannot be usually carried out in Teaching Centres because of the high economical inversion required. Furthermore, the number of students / number of machines ratio is too high. This acquires special relevance in technical studies where practical learning is essential. In this work, a virtual learning and training application for a CNC lathe is presented into a virtual learning environment developed in the Manufacturing Engineering Labs of the University of Cadiz.

Abstract: Light alloys are increasingly applied in different industrial sectors, mainly aerospace. Because of this, it is needed to analyze their behavior in the different processing procedures and, specially, machining. On the other hand, up to a few years, cutting fluids were successfully employed in these processes since their coolant and lubricant properties. Notwithstanding, environmental necessities have promoted researches focused on the development of cleaner processes avoiding cutting fluids, in particular, dry machining. However, this process can change tool geometry and affect to the material giving rise to changes in the design specifications. In this work, geometrical deviations, particularly straightness deviations, in the dry turning of UNS A92024 (Al-Cu) alloy are studied as a function of feed and cutting speed through a parametric model.