Temat: difficult-to-machine materials - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Development of a new high-pressure cooling system for machining of difficulut-to-machine materials
Autorzy:: Tanabe, Ikuo
Yamagami, Yuhta
Hoshino, Hideo
Powiązania:: https://bibliotekanauki.pl/articles/100031.pdf
Data publikacji:: 2020
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: difficult-to-machine materials
forced cooling
machining
coolant
Opis:: In recent years, titanium alloys and nickel alloys have become eminent for making aeronautic and astronautic parts. Since both nickel and titanium alloys have a very small thermal conductivity, the being used tool will suffer from huge damage by heat generated during the grinding process. Therefore, there is a requirement for a durable tool with excellent cooling capacity. In this research, the technology regarding the new forced cooling using with high-pressure coolant for machining difficult-to-machine material was developed and evaluated. A through-hole in the near the tip on the rake face of the turning tool is firstly machined by electrical discharge machining. High-pressure coolant was then supplied to the turning tool from the hole on the bottom of the tool. Several values of pressure were tried in many experiments. It is concluded from the results that; (1) a new forced cooling method in the form of drilling a hole at the tip of the tool from which supply high-pressure coolant, a tool temperature decrease and a tool-life prolongation could be achieved, (2) the technology could effectively cool near the tip of turning tool, (3) the chip was effectively broken by the high pressure, (4) It was confirmed that the tool cutting edge condition was stabilized, the surface roughness of the machined workpieces was improved, the tool hardness was maintained and the tool-life was prolonged due to the cooling effect of the devised tool.
Źródło:: Journal of Machine Engineering; 2020, 20, 1; 82-97
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Precyzyjne cięcie laserem tlenku cyrkonu IV (ZrO2)
Precision laser cutting of zirconium dioxide
Autorzy:: Nowak, A.
Wyszyński, D.
Powiązania:: https://bibliotekanauki.pl/articles/339818.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Zarządzania Produkcją
Tematy:: obróbka laserowa
LBM
laser Nd
YAG
tlenek cyrkonu IV
precyzyjna obróbka laserowa
materiały trudnoobrabialne
precision laser machining
difficult-to-machine materials
ZrO2
Opis:: Precision laser machining of a difficult to machine materials is a complex issue and requires the involvement of the wide knowledge and experience in the field of science materials and physical phenomena occurring in the within the interaction site of the laser beam with the material workpiece. Correct selection of the laser source and equipment system with appropriate instrumentation allows the processing of materials in an efficient and cost-effective way and also allows to fulfill the requirements for treatment of the materials on a micro scale. From the analysis of the results it can be concluded that the edges resulting from laser treatment carried grooves are sharp (samples 9, 10, 11), which predisposes the type of processing to perform the blades of the cutting tools. Depth obtained in these tests grooves (single-pass laser beam) may indicate a high performance cutting process of cutting teeth. In view of the aforementioned facts, it is expected to shorten the preparation time of the cutting blade, thereby reducing production costs. As a result, it is possible to increase the competitiveness of companies doing good quality tools made lower than the standard cost-effectively, and thus this type of solution has the potential of development for native Polish enterprises, so that they offer can become complementary to the tycoons on the Polish market aspect of the production of custom, dedicated ie. “tailor-made” tools. Based on the study it can be concluded that the use of DPSS Nd: YAG laser (λ = 532 nm), with appropriate selection of process parameters for precise and efficient laser shaping of difficult to cut materials, such as described in the work - zirconium dioxide. Further studies will aim to establish guidelines for the planning process precision laser cutting of other materials from the group of difficult ones, such as PCD, diamond, Al.₂O₃ (sapphire) or c-BN. This is particularly important from the point of view of the precise shape of cutting tools used widely in the aerospace, automotive and carpentry.
Źródło:: Zarządzanie Przedsiębiorstwem; 2017, 20, 2; 13-19
1643-4773
Pojawia się w:: Zarządzanie Przedsiębiorstwem
Dostawca treści:: Biblioteka Nauki

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