Temat: feed-rate - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Productive machining of complex shape parts
Autorzy:: Zabransky, V.
Vavruska, P.
Powiązania:: https://bibliotekanauki.pl/articles/99416.pdf
Data publikacji:: 2016
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: CNC
postprocessor
feed-rate
optimization
Opis:: This paper deals with technological conditions that are achieved during multi-axis milling operations. The work is focused on the improvement of quality and productivity of machining of complex shape parts. The importance of feed-rate analysis during multi-axis machining operations is mentioned. A postprocessor algorithm for correction of relative feed-rate during multiaxis machining operations has been proposed. The postprocessor generates corrected feed-rate for each block of an NC program when a multi-axis interpolation is found. Thanks to this new postprocessor algorithm, better conditions are achieved during multi-axis machining operations and also a shorter time for NC program execution when it is used without the Tool Center Point transformation. Practical benefits and the functionality of the postprocessor algorithm have been tested by machining the blade containing multi-axis tool paths.
Źródło:: Journal of Machine Engineering; 2016, 16, 1; 79-91
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: The Analysis of Feedrate Correction Influence on Corner Radius Errors of Workpieces During Milling
Autorzy:: Józwik, J.
Filipiak, P.
Powiązania:: https://bibliotekanauki.pl/articles/971217.pdf
Data publikacji:: 2009
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: cutting process
correction of feed rate
radius errors
workpiece
CNC machine
Opis:: Geometrical accuracy of workpieces manufactured in CNC technology is dependent on many different factors, such as the parameters of a cutting process. The most significant are: cutting velocity vc and feed rate vf but also proper cooling and appropriate rigidity of a machine tool. Values of these parameters are dependant on the kind of a workpiece and on the applied tools. Considering shape complexity of a workpiece, dimensional and shape errors can appear, for example deviations of flatness, rectilinearity and radius roundness, etc. To avoid errors connected with geometrical profile, the parameters of machining should be selected in such way to obtain maximal value of quality rating of a product considering its shape and dimension. The aim of this paper is to evaluate the correction of feed rate (vf ) influence on radius errors of a workpiece's corners and to define the relation between technological conditions of cutting process and the actual shape of radius after machining. In theoretical part, the influence of different factors on the accuracy of cutting on CNC machine was included; the main focus was on the accuracy of cuttings the corners with different radii. The practical part consists of corner's radius errors measurements with the usage of coordinate measuring machine and complex analysis of research findings. The findings were presented in the form of diagrams and charts. Because of the fact that the feed rate influences the global time of workpieces' machining, the findings presented in this paper enable the production engineers to choose the optimal value of feed rate during the cutting of corners on CNC machines. It is very important during machining of matrices which construction consists of many corners with given radii that are placed between perpendicular and slant walls.
Źródło:: Journal of Machine Engineering; 2009, 9, 1; 66-77
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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