Aerospace and Mechanical Engineering by Qi Luo

By Qi Luo

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The date palm (Phoenix dactylifera) is one of the most cultivated palms around the world. It geographically covers the deserts from the Atlantic coastline of Mauritania to India and from the Mediterranean Sea to about 15o in Africa. The main date-producing countries of the world are Iraq, Saudi Arabia, Egypt, Iran, Algeria, Pakistan and the Sudan. The date palm in Sudan is common in the Northern Sudan along the Nile [2]. Date palms have a fibrous structure, with four types of fibers: leaf fibers in the peduncle, baste fibers in the stem, wood fibers in the trunk and surface fibers around the trunk [3].

3 shows the images of crater wear Kt and flank wear Vbtaken at the start and the end of the milling process; it can be seen in figure 4 that the pattern trend of flank wear Vb follows the theoretical tool wear pattern, and presents the three main phases of wear. 3 Flank wearVb and crater wear Ktimage a) Taken at the beginning, b) Taken at the end of machining. Fig. 4 Evolution of a) Flank wear Vb b) Crater wear Kt Characterization of the Horizontal Milling by Time-Frequency Analysis In horizontal milling the chips are evacuated by the gravity effect that represents a significant advantage.

Yellowley, In-process detection of tool breakage in milling using cutting force models, Journal of Engineering for Industry 111 (1988) 149–157. [4] Sarhan, et al, Interrelationships between cutting force variation and tool wear in end-milling’ Journal of Materials Processing Technology 109 (2001), 229-235. [5] M. Kious, A. Ouahabi, M. Boudraa, R. Serra, Detection process approach of tool wear in high speed milling , Measurement, Volume 43, Issue 10, ( 2010),1439-1446. 52 Aerospace and Mechanical Engineering [6] P.

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