Study on Reliability of New Fixture Method for NOMEX Honeycomb

2011 ◽  
Vol 415-417 ◽  
pp. 3-13 ◽  
Author(s):  
Cheng Zhu Jin
Keyword(s):  
Magnetic Field ◽  
Iron Powder ◽  
Strong Magnetic Field ◽  
Magnetic Force ◽  
Low Cost ◽  
Cutting Parameters ◽  
Milling Process ◽  
Milling Force ◽  
Experiment Method ◽  
Nomex Honeycomb

A new fixturing method, based on the principles of strong magnetic field and friction-clamping, is presented. The method can completely constrain the bottom of the NOMEX honeycomb with the friction force between iron powder and honeycomb walls, honeycomb and clamping plane produced from the gravity of the iron powder injected into the honeycomb and the magnetic force produced by the additional strong magnetic field. To analyze the reliability of the method, firstly, the milling force and its distribution are predicted with FEM and experiment method under the condition of different cutting parameters. Then, the fixturing strength and the milling force are analyzed comparatively in the low-reliability and -stability zone during the milling process. It is proved by experiments and analysis that the fixturing method has the advantages of low cost, being easy to use, and no pollution.

Analysis to Milling Force Base on AdvantEdge Finite Element Analysis

2014 ◽  
Vol 981 ◽  
pp. 895-898
Author(s):  
Fu Cai Zhang ◽  
Qing Wang ◽  
Ru Yang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Simulation Analysis ◽  
Cutting Parameters ◽  
Milling Process ◽  
Force Model ◽  
Cnc Milling ◽  
Milling Force ◽  
Element Analysis ◽  
Milling Force Model

Aiming at NC milling processing simulation problem, a ball-end cutter milling force model is established, the numerical simulation analysis of aluminum alloy AL2024 milling process is conducted by using the finite element analysis software AdvantEdge finite element analysis. Focus on the Milling force simulation, the size of the milling force is obtained by simulating calculation. Using the same cutting parameters for milling experiment, the results show that simulation analysis of the cutting force values ​​are in good agreement with the experimental results，the milling force model prior established is correct. The research laid a foundation for the perfect CNC milling simulation system.

scholarly journals On the nature of magneto-cathodic rays

1910 ◽  
Vol 83 (563) ◽  
pp. 324-334 ◽  
Keyword(s):  
Magnetic Field ◽  
Strong Magnetic Field ◽  
Electric Charge ◽  
Electric Discharge ◽  
Magnetic Force ◽  
Definition Of ◽  
The Magnetic Field

As early as 1858, Plücker observed that, when a tube in which an electric discharge is passing is placed longitudinally in a strong magnetic field, a band of light is seen, which has the cathode for its section, and for its direction the line of magnetic force passing through the cathode. Until comparatively recently the usually accepted explanation of this light was as follows: Under the influence of the magnetic field the cathode rays are bent into the form of a spiral or helix round the lines of magnetic force. Now these primary cathode rays produce secondary rays by collisions with the molecules of the gas, and both the primary and secondary rays produce fluorescence in the gas. The former alone would show the spiral nature of the path, the latter cause a decrease in the definition of the light, which now appears as a band. In the meantime, other physicists have observed the same phenomenon. Attempts have been made to detect an electric charge on the rays, but with­out success. This lack of charge and the necessity of a magnetic field for their production, have led Villard and Righi, among others, to regard them as a new kind of rays, and the name magneto-cathodic rays (Villard) or magnetic rays (Righi), has been assigned to them to indicate their origin.

3D Simulation and Analysis for Face Precision Milling of Aerospace Aluminum Alloy

2011 ◽  
Vol 188 ◽  
pp. 657-661 ◽  
Author(s):  
Ai Qin Lin ◽  
Min Li Zheng ◽  
Yan Gu
Keyword(s):  
Finite Element ◽  
Equivalent Stress ◽  
Three Dimensional ◽  
Cutting Parameters ◽  
Milling Process ◽  
Experimental Result ◽  
Milling Force ◽  
Element Analysis ◽  
Chip Shape ◽  
Three Dimensional Finite Element

The present work aims at simulating three-dimensional milling operation of aluminum allo7451.Building a nose ring radius and edge radius tool model. Using finite element analysis software , conducted a three-dimensional simulation of milling process. Milling force, milling temperature, stress distribution and chip shape of milling process have been got. A milling force experiment was carried out under the same cutting conditions as the simulation, and a good agreement between the simulation result and the experimental result was achieved, and chip shape matched the practice well. The simulation shows that the three-dimensional finite element milling cutter model and the workpiece model can be used to correctly simulate precision milling process, optimizing the cutting parameters by analyzing variation of the cutting force, the temperature and equivalent stress.

A Pole/Zero Placement Approach to Reducing Structure Vibration in End Milling

Manufacturing ◽  
2003 ◽  
Author(s):  
J.-J. Junz Wang ◽  
C. Y. Huang
Keyword(s):  
Forced Vibration ◽  
End Milling ◽  
Cutting Parameters ◽  
Milling Process ◽  
Depth Of Cut ◽  
Milling Force ◽  
Structure Dynamics ◽  
Vibration Model ◽  
Structure Vibration ◽  
The Fourier Transform

Forced vibration or the steady state vibration in a milling process inevitably occurs due to the periodic excitation of the intermittent cutting engagement of the milling cutter on the work and the structure, and it almost always exist even in the absence of chatter in a stable milling system, leading to dimensional and surface error and premature wear in tool and machine components. In this paper, an analytical model for the forced vibration in an end milling process is derived and criteria in selecting cutting conditions to reduce the forced vibration are presented. The analytic expression for the forced vibration due to the periodic milling force is obtained as the product of the Fourier transform of the milling force and the frequency transform of the structure dynamics. Analysis of the vibration model shows that the structure vibration can be reduced by selecting cutting parameters so that the zeroes of the frequency transform of the milling process function are near the poles of the structure dynamics. A design equation in terms of cutter geometry, axial depth of cut and structure natural frequency is obtained for the conditions when the forced vibration can be minimized. The presented analysis is illustrated through numerical simulation and verified by experimental results.

Analysis on Milling Force Based on AdvantEdge FEM

2013 ◽  
Vol 300-301 ◽  
pp. 253-260 ◽  
Author(s):  
Xiu Lin Sui ◽  
Ru Yang ◽  
Qian Wang ◽  
Xin Ling Zhao
Keyword(s):  
Simulation Analysis ◽  
Cutting Parameters ◽  
Milling Process ◽  
Force Model ◽  
Cnc Milling ◽  
Milling Force ◽  
Element Analysis ◽  
Nc Milling ◽  
Simulation Problem ◽  
Milling Force Model

Aiming at NC milling processing simulation problem, a ball-end cutter milling force model is established, the numerical simulation analysis of aluminum alloy AL2024 milling process is conducted by using the finite element analysis software AdvantEdge FEM. Focus on the Milling force simulation, the size of the milling force is obtained by simulating calculation. Using the same cutting parameters for milling experiment, the results show that simulation analysis of the cutting force values are in good agreement with the experimental results，the milling force model prior established is correct. The research laid a foundation for the perfect CNC milling simulation system.

Thermal Characteristics Analysis of Hardened Steel Die Transition Region in Machining Process

2016 ◽  
Vol 836-837 ◽  
pp. 394-401 ◽  
Author(s):  
Wei Zhang ◽  
Hong Li Liu ◽  
Tong Wu ◽  
Xiao Yan Cui ◽  
Feng Shun He
Keyword(s):  
Finite Element ◽  
Transition Region ◽  
Cutting Parameters ◽  
Milling Process ◽  
Hardened Steel ◽  
Machining Process ◽  
Milling Force ◽  
Significant Difference ◽  
Milling Temperature ◽  
Processing Stability

Due to the transition region with different hardness, the milling process of assembled hardened steel die is prone to generate flutter, which is hard to ensure surface integrity of workpiece. By establishing the finite element model, the milling process of assembled hardened steel die was calculated by the finite element method. Effects of cutting parameters on milling force and milling temperature were achieved by the above finite element analysis. The laws of the stress and the thermal field distribution in the assembled transition region are analyzed and discovered. The analysis results demonstrate that milling force and milling temperature of the transition region changes in step leaping way. There is a close relationship between processing stability and cutting parameters. The stress and the thermal distribution of the transition region have a significant difference due to the changes in material hardness.

Study of MFM Application in Semiconductor Failure Analysis

2004 ◽  
Author(s):  
Way-Jam Chen ◽  
Lily Shiau ◽  
Ming-Ching Huang ◽  
Chia-Hsing Chao
Keyword(s):  
Magnetic Field ◽  
Failure Analysis ◽  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Current Flow ◽  
Force Microscopy ◽  
The Magnetic Field ◽  
A Current

Abstract In this study we have investigated the magnetic field associated with a current flowing in a circuit using Magnetic Force Microscopy (MFM). The technique is able to identify the magnetic field associated with a current flow and has potential for failure analysis.

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