Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 Journal of Machine Engineering

2 2007

Powiadomienia systemowe

Sesja wygasła!
Sesja wygasła!

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

A Study of Cutter Path in High Speed Rough Milling of Pockets. Part II: Modelling and Performance Evaluation

Giorleo L., Giuliani M., Pittala G. M., Ruberto M.

Journal of Machine Engineering

2007

Vol. 7, No. 2

27--40

Large aeronautical parts, such as wing ribs, involve a volume of metal removed up to 90-95 % of initial weight, particularly pocket milling takes 60-70% of the total cycle time, so this operation plays an important role in the cost definition of the final product. Since typical materials in aircraft frames are aluminium alloys, High Speed Machining technology is convenient and more frequently used, also for rough operation. Using modern production system cutting velocity and feedrate are relatively high also in rough machining. It is important to determine cutter path and position vs time law in order to allow the lowest machining time and to control machine dynamic conditions. In this paper linear trajectory and cubic spline trajectory are compared in terms of execution time during high speed rough machining of pockets; in this part the comparison is numerical. The results indicate time saving using spline interpolation and the influence of feedrate and acceleration profile about above cutter paths. This is important information to select best cut condition and machining performance.

A Study of Cutter Path in High Speed Rough Milling of Pockets. Part I: Modelling and Performance Evaluation

Giuliani M., Monno M., Pittala G. M.

Journal of Machine Engineering

2007

Vol. 7, No. 2

16--26

Considering large aeronautical parts, such as wing ribs, a volume up to 90-95% of the initial weight is removed. Prticularly pocket milling takes 60-70% of the total cycle time, so this operation plays an important role in the cost definition of the final product. Since typical materials in aircraft frames are aluminium alloys. High Speed Machining technology is convenient and more frequence used, also for rough operation. Using modern production systems cutting velocity and feedrate are relatively high also in rough machining. Main features of linear trajectory and cubic spline trajectory have been numerically evaluated in part I of this paper. In the second part tool paths have been experimental tested in terms of machining time considering high speed rough machining of pockets; a comparison between linear interppolation and cubic spline has been performed using CNC systems and an open architecture revolute robot.