scholarly journals IMPROVING THE EFFICIENCY OF HIGH-SPEED MILLING OF THIN-WALLED ELEMENTS OF PARTS OF COMPLEX GEOMETRIC SHAPES

2017 ◽  
Vol 0 (2 (2)) ◽  
pp. 23-28
Author(s):  
Anton Germashev ◽  
Victor Logominov ◽  
Yelena Kozlova ◽  
Vladimir Krishtal
Keyword(s):  
High Speed ◽  
High Speed Milling ◽  
Geometric Shapes ◽  
Thin Walled

Stability Prediction during Thin-Walled Workpiece High-Speed Milling

2009 ◽  
Vol 69-70 ◽  
pp. 428-432 ◽  
Author(s):  
Qing Hua Song ◽  
Yi Wan ◽  
Shui Qing Yu ◽  
Xing Ai ◽  
J.Y. Pang
Keyword(s):  
High Speed ◽  
Dynamic Properties ◽  
Removal Rate ◽  
Cutting Parameters ◽  
Milling Process ◽  
Machining Process ◽  
High Speed Milling ◽  
Thin Walled ◽  
Optimization Of Cutting Parameters ◽  
Free Material

A method for predicting the stability of thin-walled workpiece milling process is described. The proposed approach takes into account the dynamic characteristics of workpiece changing with tool positions. A dedicated thin-walled workpiece representative of a typical industrial application is designed and modeled by finite element method (FEM). The workpiece frequency response function (FRF) depending on tool positions is obtained. A specific 3D stability chart (SC) for different spindle speeds and different tool positions is then elaborated by scanning the dynamic properties of workpiece along the machined direction throughout the machining process. The dynamic optimization of cutting parameters for increasing the chatter free material removal rate and surface finish is presented through considering the chatter vibration and forced vibration. The investigations are compared and verified by high speed milling experiments with flexible workpiece.

Study on the Stability of High-Speed Milling of Thin-Walled Workpiece

2010 ◽  
Vol 97-101 ◽  
pp. 1849-1852
Author(s):  
Tong Yue Wang ◽  
Ning He ◽  
Liang Li
Keyword(s):  
Aluminum Alloy ◽  
Machine Tool ◽  
High Speed ◽  
Modal Parameters ◽  
Inertia Effect ◽  
Cutting Force Coefficients ◽  
High Speed Milling ◽  
Machining System ◽  
Thin Walled ◽  
The Stability

Thin-walled structure is easy to vibrate in machining. The dynamic milling model of thin-walled workpiece is analyzed based on the analysis of degrees in two perpendicular directions of machine tool-workpiece system. In high speed milling of 2A12 aluminum alloy, the compensation method based on the modification of inertia effect is proposed and accurate cutting force coefficients are obtained. The machining system is divided into “spindle-cutter” and “workpiece-fixture” two sub-systems and the modal parameters of two sub-systems are acquired via modal analysis experiments. Finally, the stability lobes for high speed milling of 2A12 thin-walled workpiece are obtained by the use of these parameters. The results are verified against cutting tests.

Selected 5-Axis Strategies for High-Speed Milling of Thin-Walled Parts

2013 ◽  
Vol 467 ◽  
pp. 466-469 ◽  
Author(s):  
Martin Kováč ◽  
Jozef Peterka
Keyword(s):  
High Speed ◽  
Machined Surface ◽  
High Speed Milling ◽  
Experimental Part ◽  
New Methods ◽  
Flexible Parts ◽  
Thin Walled ◽  
Five Axis ◽  
Five Axes

The article deals with the proposed 5-axis strategies of high-speed milling of thin-walled parts. I proposed three ways of material take-in. It is an advantage that by this milling the shaft of the tool is not in contact with the machined surface. Each tool contact with the machined surface leaves an unwanted track on the parts surface. Article present new methods for five axes high speed milling flexible parts. Experimental part was five axis high speed milling and measuring quality of surface. Results were evaluated by statistic methods by software Minitab.

Stability recognition for high-speed milling of TC4 thin-walled parts with curved surface

2017 ◽  
Vol 91 (5-8) ◽  
pp. 2819-2829 ◽  
Author(s):  
Jian-wei Ma ◽  
Zhen Liu ◽  
Zhen-yuan Jia ◽  
De-ning Song ◽  
Yuan-yuan Gao ◽  
...  
Keyword(s):  
High Speed ◽  
Curved Surface ◽  
High Speed Milling ◽  
Thin Walled

scholarly journals Influence of the Cut Axial Depth on Surface Roughness at High-Speed Milling of Thin-Walled Workpieces

2021 ◽  
Vol 20 (2) ◽  
pp. 127-131
Author(s):  
A. I. Germashev ◽  
V. A. Logominov ◽  
S. I. Dyadya ◽  
Y. V. Kozlova ◽  
V. A. Krishtal
Keyword(s):  
High Speed ◽  
End Milling ◽  
Spindle Speed ◽  
Depth Of Cut ◽  
Work Piece ◽  
Natural Vibration Frequency ◽  
High Speed Milling ◽  
Wide Range ◽  
Thin Walled ◽  
Axial Depth

The paper presents the results of research on the dynamics of end milling of thin-walled work-pieces having complex geometric shapes. Since the milling process with shallow depths of cut is characterized by high intermittent cutting, the proportion of regenerative vibrations decreases, and the effect of forced vibrations on the dynamics of the process, on the contrary, increases. The influence of  axial depth of cut on the vibrations arising during processing, and roughness of the processed surface have been studied in paper.  The experiments have been carried out in a wide range of changes in the spindle speed at different axial cutting depths.  Vibrations of a thin-walled work-piece  have been recorded with an inductive sensor and recorded in digital form. Then an oscillogram has been used to estimate the amplitude and frequency of oscillations. The profilograms of the machined surface have been analysed. Roughness has been evaluated by the parameter Ra. The results have shown similar relationships for each of the investigated axial cutting depths. The worst cutting conditions  have been observed when the natural vibration frequency coincided with the tooth frequency or its harmonics. It is shown that the main cause of vibrations in high-speed milling  is forced rather than regenerative vibrations. Increasing the axial depth of cut at the same spindle speed increases the vibration amplitude. However, this does not significantly affect the roughness of the processed surface in cases when it comes to vibration-resistant processing.

High-Speed Milling Characteristics and the Residual Stresses Control Methods Analysis of Thin-Walled Parts

2011 ◽  
Vol 223 ◽  
pp. 456-463 ◽  
Author(s):  
Bei Zhi Li ◽  
Xiao Hui Jiang ◽  
Huai Jing Jing ◽  
Xiao Yan Zuo
Keyword(s):  
Residual Stress ◽  
Tensile Stress ◽  
Cutting Force ◽  
High Speed ◽  
Tangential Force ◽  
Cutting Temperature ◽  
Milling Process ◽  
Residual Tensile Stress ◽  
High Speed Milling ◽  
Thin Walled

With FEM software of AdvantEdge, a model was created to analyze cutting force and thermal in the high-speed milling process, this model included a complete milling process of cutter radius. Combined with experiments validation, in high-speed milling, the normal force is greater than the tangential force and result in greater residual stress of that direction, which indicates that mechanical force play an essential part on the formation of residual stress. When the speed is over certain scope, the cutting force decreases, but the cutting temperature has been rising. In Roughing, by limiting the range of high-speed the residual tensile stress impact can be reduced. While in finishing, as the feed rate reducing the residual tensile stress will decrease greatly, improving the surface quality of thin-walled parts.

Sign in / Sign up

Export Citation Format

Share Document