Temat: five axis milling machine - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Parametric model analysis, geometrical characteristics and tool trajectories to surface roughness when machining the cycloid screw by a five-axis milling machine
Autorzy:: Pham, Van Bong
Thien, Nguyen Van
Nguyen, Van Que
Duy, Trinh Nguyen
Nguyen, Duy Khanh
Tien, Dung Hoang
Powiązania:: https://bibliotekanauki.pl/articles/2086278.pdf
Data publikacji:: 2022
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: cycloid screw surface
five axis milling machine
ball nose end mill
surface roughness
Opis:: To improve the screw machining accuracy in modern air compressors. This paper investigates three main issues during the development process for cycloid screw machining methods on five-axis CNC machine tools with high precision and efficiency. First, the theoretical basis of cycloid screw surface shaping and derivative of the final profile equation is established. Then, modeling the center trajectory and feed rate according to the cycloid screw profile is given. Next is the experimental setup and simulation of the cycloid screw machining process and discussions. The obtained surface quality prediction parameters are close to the actual measured value, which can be used as a reference model for five-axis CNC milling technology processes. All experimental results obtained by the proposed mathematical model show that a surface with good surface quality is created, meeting the requirements for surface quality. The main work can be used as references for engineers and technicians in practice.
Źródło:: Journal of Machine Engineering; 2022, 22, 2; 108--124
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Investigation of the Dynamic Characteristics and Machining Stability of a Bi-rotary Milling Tool
Autorzy:: Hung, Jui-Pin
Lin, Wei-Zhu
Powiązania:: https://bibliotekanauki.pl/articles/103262.pdf
Data publikacji:: 2019
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: bi-rotary milling head
dynamic characteristics
five axis milling machine
machining stability
głowica frezarska dwuobrotowa
właściwości dynamiczne
frezarka pięcioosiowa
stabilność obróbki
Opis:: Bi-rotary milling head is the primary component of multiple-axis machine tool toward the multiply machining operation. The machining performance is greatly related to the structure characteristics and positioning precisions of the swivel head. This study was aimed at developing a bi-rotary milling head module, which is composed of a direct drive motor, cross roller bearings and motorized spindle unit. In order to evaluate the machining stability at the design phase, the dynamic characteristics of the rotary milling were first analyzed with finite element method. Especially, the variations of the dynamic characteristics of the spindle tool with the changing of the titling configuration of swivel axis were examined. In order to consider the accurate presentation of a spindle tool system and swivel mechanism, the bearings in the rolling components were also included in the finite element model and simulated with surface contact elements with adequate contact stiffness. The dynamic frequency response function of the spindle tool at different swinging positions were predicted for comparisons, which were further used to calculate the machining stability based on the machining mechanics. The current results show that the feeding direction and swinging positions of rotary milling head have a significant influence on the dynamic characteristics and machining ability of the spindle tool. The variations of the cutting depth with the swinging of A axis fall in the range of 11% to 40%, depending on the feeding direction and swinging angle. The analysis results are expected to clearly demonstrate the variation of the machining performance of the spindle tool under different milling configurations. The devised model and modeling approach can be applied to develop a five axis milling machine with desired dynamic and machining performance.
Źródło:: Advances in Science and Technology. Research Journal; 2019, 13, 1; 14-22
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Tool path planning for five-axis end milling of cycloidal gears and its full tooth profile accuracy measurement
Autorzy:: Wang, Jian
Liao, Longxing
Luo, Shanming
Mo, Jingyu
Powiązania:: https://bibliotekanauki.pl/articles/38890069.pdf
Data publikacji:: 2023
Wydawca:: Instytut Podstawowych Problemów Techniki PAN
Tematy:: cycloidal gear
end milling
five-axis CNC machine tool
tooth path planning
full tooth profile accuracy measurement
Opis:: This paper proposes a method of end milling of cycloidal gears using a five-axis computer analytical control (CNC) machine tool. Firstly, the basic principle of the five-axis end milling of cycloidal gears is introduced. The cutting characteristics of the ball-end and the flat-end cutters are analyzed. Secondly, the path planning method of the five-axis end milling of cycloidal gears is researched. A curvature matching method is used to check for local over-cut interference and a minimum distance method is used to check for global collision interference. These two interferences are avoided by calculating the feasible range of cutter orientations and adjusting the dips of cutter shafts. Tests of end milling of cycloidal gears are carried out using a ball-end cutter and a flat-end cutter, respectively. Finally, full tooth profile accuracy measurements are undertaken with an image-measuring instrument to assess the quality of cycloidal gears processed in this way. This study provides a theoretical basis for the improvement of the tooth profile accuracy and surface quality of cycloidal gears.
Źródło:: Engineering Transactions; 2023, 71, 1; 3-21
0867-888X
Pojawia się w:: Engineering Transactions
Dostawca treści:: Biblioteka Nauki

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