Efficient Method for Prediction of Stability in Low Immersion Milling
نویسنده
چکیده
This paper presents cutting force prediction algorithm for low immersion end-milling, using an efficient dynamic force modeler. The geometric simulation of milling process was performed, using the B-Rep solid modeling techniques. For predicting stability lobes, two methods were used for prediction of stability lobes: the frequency domain technique and the time finite element analysis (TFEA). The frequency domain technique is faster and except for low immersion milling, is accurate. The TFEA method forms an approximate solution by dividing the cutting time into a finite number of elements. This approximated solution is then matched with the exact one for free vibration to obtain a discrete linear map. The comprehensive time domain simulation is used, in order to verify stability lobes diagram obtained by frequency domain technique and TFEA method.
منابع مشابه
Effects of Helix Angle Variations on Stability of Low Immersion Milling
The stability behavior of low immersion helical end milling processes is investigated in this paper. Low radial immersion milling operations involve interrupted cutting which induces chatter vibration under certain cutting conditions. Time Finite Element Analysis (TFEA) is suggested for an approximate solution for delayed differential equations encountered during interrupted milling. An improve...
متن کاملOn Stability Prediction for Low Radial Immersion Milling
& Stability boundaries for milling are predicted by the zeroth-order approximation (ZOA) and the semi-discretization (SD) methods. For high radial immersions, the methods predict similar stability boundaries. As radial immersion is decreased, the disagreement between the predictions of the two methods grows considerably. The most prominent difference is an additional type of instability predict...
متن کاملStability of up-milling and down-milling, part 1: alternative analytical methods
The dynamic stability of the milling process is investigated through a single degree of freedom mechanical model. Two alternative analytical methods are introduced, both based on finite dimensional discrete map representations of the governing time periodic delay-differential equation. Stability charts and chatter frequencies are determined for partial immersion upand down-milling, and for full...
متن کاملAn Investigation on Milling Method in Reduction of Magnesium Nano-Powder Particles Based on Sustaining Chemical Activity
Magnesium has been used in aviation industries, automobile manufacturing, electronics and medical engineering due to its unique properties thus far. The main problem in its utilization is the high reactivity of magnesium with oxygen and humidity, which both changes its properties. The surface charge and different density results in difficulties in dispersion stability of the powder in an ...
متن کاملAn Instantaneous Rigid Force Model For 3-Axis Ball-End Milling Of Sculptured Surfaces
An instantaneous rigid force model for prediction of cutting forces in ball-end milling of sculptured surfaces is presented in this paper. A commercially available geometric engine is used to represent the cutting edge, cutter and updated part geometries. The cutter used in this work is an insert type ball-end mill. Intersecting an inclined plane with the cutter ball nose generates the cutting...
متن کامل