Investigation of Ignition Temperature, Time to Ignition and Chip Morphology after the High-Speed Dry Milling of Magnesium Alloys
Artykuł w czasopiśmie
MNiSW
20
Lista A
| Status: | |
| Autorzy: | Kuczmaszewski Józef, Zagórski Ireneusz, Dziubińska Anna |
| Rok wydania: | 2016 |
| Wersja dokumentu: | Drukowana | Elektroniczna |
| Język: | angielski |
| Numer czasopisma: | 3 |
| Wolumen/Tom: | 88 |
| Web of Science® Times Cited: | 15 |
| Bazy: | Web of Science |
| Efekt badań statutowych | NIE |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | NIE |
| Abstrakty: | angielski |
| Purpose The objective of the research was to determine time to ignition of magnesium alloy chips and the ignition-preceding stages as well as to examine chip morphology. The tests were conducted according to the following pattern: directly after a milling operation, after ignition using a special test stand located outside the machine tool, and after intensive oxidation which prevented ignition. Design/methodology/approach Milling is a machining process widely used in the manufacturing of various parts that are applied e.g. in the aircraft industry. Milling is used for both roughing and finishing machining. In the dry machining of magnesium alloys, spontaneous ignition can occur; therefore, the analysis of chip temperature in the cutting area is of great significance. Additionally, time to ignition and chip morphology are crucial when considering the safety of magnesium alloy machining processes. Findings The experimental results demonstrate the effect of parameters of the milling process on time-to-ignition of chips made of magnesium alloys AZ31 and AZ91HP. The experiments also involved examining the morphology of a selection of chips produced at the maximum cutting velocity vc and feed per tooth fz. In addition, we analyzed the morphology of both ignition products and chips subjected to high temperature where ignition did not occur. Practical implications Based on the time-to-ignition and chip morphology results, it is possible to indicate both safety levels in machining and the efficient range of parameters in the milling of aircraft parts made of magnesium alloys. Originality/value The paper presents a new approach to assessing safety in milling operations. The results of the tests of chip flammability (time to ignition) which were run at a special test stand placed outside the machine tool enabled determination of both safety and efficiency range of the milling process. |
