Estimation of Unsteady and Steady Polishing Force in Magnetic Abrasive Finishing Using a Permanent Magnet End-Mill Tool

2016 ◽  
Vol 874 ◽  
pp. 178-183
Author(s):  
Lei Ma ◽  
Tatsuya Furuki ◽  
Wei Wu ◽  
Toshiki Hirogaki ◽  
Eiichi Aoyama
Keyword(s):  
High Speed ◽  
Force Sensor ◽  
Iron Particles ◽  
End Mill ◽  
Abrasive Finishing ◽  
Polishing Force ◽  
Different Shapes ◽  
The Relationship ◽  
The Magnetic Field ◽  
Improve Stability

Stable finishing is considered difficult to achieve using conventional magnetic abrasive because of its unstable polishing characteristics. In this paper, three different shapes of iron particles are used to produce a magnetic brush to improve stability. The unsteady and steady polishing force produced under the magnetic field of an end-mill type tool is discussed. We also develop prototype equipment combining a high speed camera with a force sensor to analyse micro-changes in the magnetic brush while machining. The relationship between the unsteady or steady polishing force and the polishing capability of the magnetic brush is explored in an attempt to construct a model for predicting polishing forces.

Monitoring of End-Mill Process Based on Infrared Imagery with a High Speed Thermography

2014 ◽  
Vol 625 ◽  
pp. 213-218 ◽  
Author(s):  
Masatoshi Shindou ◽  
Hiroyuki Kodama ◽  
Toshiki Hirogaki ◽  
Eiichi Aoyama
Keyword(s):  
High Speed ◽  
High Performance ◽  
Cutting Temperature ◽  
End Mill ◽  
Tool Temperature ◽  
Time Duration ◽  
Rotating Speed ◽  
Tool Position ◽  
The Relationship ◽  
Mill Process

In this study, we perform the end-mill process of a difficult-to-cut material (JIS SUS310 stainless steel) and observe it with high performance infrared thermography. Considering the rotating angle of end-mill tool, a pixel temperature in each frame is investigated to obtain the tool temperature variation after cutting of each tooth in end-mill process. The tool temperature distribution can be analyzed at each rotating tool position in end-mill process from imageries, considering the relationship between the time duration of each frame and the rotating speed of an end-mill tool. Moreover, the tool/holder shape and the number of cutting teeth can be seen to affect the cutting temperature because the tool heat capacity and the heat input are different. The examination and analytical results show this method to be effective to estimate the tool temperature in the end-mill process sufficiently.

Experimental Study on Ball End Mill in Glass Machining at High Speed

2011 ◽  
Vol 314-316 ◽  
pp. 1167-1170
Author(s):  
Zhi Wei ◽  
Ji Hong Jia ◽  
Mei Lin Gu ◽  
Chao Zuo ◽  
Xing Zhen Jin
Keyword(s):  
High Speed ◽  
Experimental System ◽  
Milling Process ◽  
End Mill ◽  
Ball End Mill ◽  
Milling Force ◽  
Milling Tool ◽  
Explicit Analysis ◽  
Stress And Deformation ◽  
The Relationship

This paper describes the experimental system of milling force, the tool geometrical feature and the certain experimental condition in the section of experimental case, which also makes an explanation about the designing of experimental case and the analysis of the experimental data. It also represents the relationship between coefficients associated with the milling process and the milling force applied on the tool in detail. A finite element method is used to make an explicit analysis on the stress and deformation of the milling tool under the application of certain milling force. Finally, a summary is made to conclude the study and its results.

Analysis of the Milling Acoustic Signal Using Wavelet Decomposition

2016 ◽  
Vol 693 ◽  
pp. 1503-1508
Author(s):  
Tong Yue Wang ◽  
Q.P. Sun
Keyword(s):  
Acoustic Signal ◽  
High Speed ◽  
Wavelet Decomposition ◽  
Great Influence ◽  
Acoustic Method ◽  
Sound Signal ◽  
Cutting Process ◽  
End Mill ◽  
High Speed Milling ◽  
The Relationship

Vibration has a great influence on the cutting process and it can be detected by many signals. In this work, a set of experiments are conducted on Mikron UCP810 DURO high speed milling center with Fraisa carbide end mill for milling 2A12 aluminum workpiece, an acoustic method is used to detect the milling signals. The captured sound signals are analyzed using Matlab Daubechies5 wavelets with six levels of decomposition, the detail and approximation of the sound signal components are obtained. The analysis results demonstrate the relationship between the signal and the vibration.

A Model of Cutting Forces for Ball End Mill in High Speed Machining

2010 ◽  
Vol 97-101 ◽  
pp. 3108-3112
Author(s):  
Bing Yan ◽  
Chao Hui Xu ◽  
Wei Wang
Keyword(s):  
High Speed ◽  
End Milling ◽  
Cutting Speed ◽  
High Speed Machining ◽  
End Mill ◽  
Cutting Mechanism ◽  
Ball End Mill ◽  
High Speed Cutting ◽  
The Relationship ◽  
Machining Characteristics

The machining characteristics of hardened still for mould and die greatly affect the accuracy and productivity in industry. The physical modeling and simulation of ball end milling is investigated in this paper. The influence of cutting speed to the cutting mechanism in high speed cutting is taken into account and the momentum force of chip is introduced into the model. By analyzing the shape of the chips the relationship between the cutting speed and shear angle is obtained. The model has been tested on 718HH, with appropriate Seco tools. The validation shows that the adjustment between the model and the real force is adequate, both in shape and magnitude.

Predictive Failure Analysis of Solder Joints with Simultaneous High Speed EBSD and EDS

2018 ◽  
Author(s):  
J. Lindsay ◽  
P. Trimby ◽  
J. Goulden ◽  
S. McCracken ◽  
R. Andrews
Keyword(s):  
High Speed ◽  
Solder Joints ◽  
Phase Distribution ◽  
Bond Failure ◽  
Microstructural Parameters ◽  
Snpb Solder ◽  
Grain Orientations ◽  
Accelerated Thermal Cycling ◽  
The Relationship ◽  
Opening Up

Abstract The results presented here show how high-speed simultaneous EBSD and EDS can be used to characterize the essential microstructural parameters in SnPb solder joints with high resolution and precision. Analyses of both intact and failed solder joints have been carried out. Regions of strain localization that are not apparent from the Sn and Pb phase distribution are identified in the intact bond, providing key insights into the mechanism of potential bond failure. In addition, EBSD provides a wealth of quantitative detail such as the relationship between parent Sn grain orientations and Pb coarsening, the morphology and distribution of IMCs on a sub-micron scale and accurate grain size information for all phases within the joint. Such analyses enable a better understanding of the microstructural developments leading up to failure, opening up the possibility of improved accelerated thermal cycling (ATC) testing and better quality control.

scholarly journals Research on the Ignition Height and Reaction Flame Temperature of PTFE/Al/Si/CuO with Different Mass Ratios of PTFE/Si

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3464
Author(s):  
Xuan Zou ◽  
Jingyuan Zhou ◽  
Xianwen Ran ◽  
Yiting Wu ◽  
Ping Liu ◽  
...  
Keyword(s):  
Energy Release ◽  
High Speed ◽  
Flame Temperature ◽  
Sintering Process ◽  
Release Process ◽  
Reactive Material ◽  
Temperature Changes ◽  
Release Capacity ◽  
Mass Ratios ◽  
The Relationship

Recent studies have shown that the energy release capacity of Polytetrafluoroethylene (PTFE)/Al with Si, and CuO, respectively, is higher than that of PTFE/Al. PTFE/Al/Si/CuO reactive materials with four proportions of PTFE/Si were designed by the molding–sintering process to study the influence of different PTFE/Si mass ratios on energy release. A drop hammer was selected for igniting the specimens, and the high-speed camera and spectrometer systems were used to record the energy release process and the flame spectrum, respectively. The ignition height of the reactive material was obtained by fitting the relationship between the flame duration and the drop height. It was found that the ignition height of PTFE/Al/Si/CuO containing 20% PTFE/Si is 48.27 cm, which is the lowest compared to the ignition height of other Si/PTFE ratios of PTFE/Al/Si/CuO; the flame temperature was calculated from the flame spectrum. It was found that flame temperature changes little for the same reactive material at different drop heights. Compared with the flame temperature of PTFE/Al/Si/CuO with four mass ratios, it was found that the flame temperature of PTFE/Al/Si/CuO with 20% PTFE/Si is the highest, which is 2589 K. The results show that PTFE/Al/Si/CuO containing 20% PTFE/Si is easier to be ignited and has a stronger temperature destruction effect.

scholarly journals Development of a Wearable Mouth Guard Device for Monitoring Teeth Clenching during Exercise

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1503
Author(s):  
Rio Kinjo ◽  
Takahiro Wada ◽  
Hiroshi Churei ◽  
Takehiro Ohmi ◽  
Kairi Hayashi ◽  
...  
Keyword(s):  
Force Sensor ◽  
Tolerance Test ◽  
Sensor Output ◽  
Sports Performance ◽  
Teeth Grinding ◽  
Exercise Tolerance Test ◽  
Sensor Position ◽  
Video Motion Analysis ◽  
Teeth Clenching ◽  
The Relationship

Teeth clenching during exercise is important for sports performance and health. Recently, several mouth guard (MG)-type wearable devices for exercise were studied because they do not disrupt the exercise. In this study, we developed a wearable MG device with force sensors on both sides of the maxillary first molars to monitor teeth clenching. The force sensor output increased linearly up to 70 N. In four simple occlusion tests, the trends exhibited by the outputs of the MG sensor were consistent with those of an electromyogram (EMG), and the MG device featured sufficient temporal resolution to measure the timing of teeth clenching. When the jaw moved, the MG sensor outputs depended on the sensor position. The MG sensor output from the teeth-grinding test agreed with the video-motion analysis results. It was comparatively difficult to use the EMG because it contained a significant noise level. Finally, the usefulness of the MG sensor was confirmed through an exercise tolerance test. This study indicated that the developed wearable MG device is useful for monitoring clenching timing and duration, and the degree of clenching during exercise, which can contribute to explaining the relationship between teeth clenching and sports performance.

scholarly journals The Application of Fuzzy Theory in the Evaluation of Visual Images of Smartphone Rear Cameras

2021 ◽  
Vol 11 (8) ◽  
pp. 3555
Author(s):  
Chien-Hsiung Chen ◽  
Zhongzhen Lin
Keyword(s):  
Factor Analysis ◽  
Fuzzy Numbers ◽  
Fuzzy Theory ◽  
Consumer Perceptions ◽  
Visual Images ◽  
Triangular Fuzzy Numbers ◽  
Potential Consumer ◽  
Comprehensive Comparison ◽  
Different Shapes ◽  
The Relationship

In the present era, technology is developing rapidly. Smartphones play a significant part in people’s lives. However, the research on smartphones mainly focuses on the area of technological realization. The purposes of this study were to examine the relationship between the various rear cameras in smartphones and consumer perceptions, and to understand consumers’ purchasing intentions and preferences. Through the methods of multidimensional scaling (MDS), factor analysis and triangular fuzzy numbers, the visual images of the smartphone rear cameras were analyzed and discussed. The results indicate that the visual images taken by different shapes of rear camera are quite distinct in the categories of innovative and fashionable, and simple and pure, but less distinct in the categories of harmonious and ordered, premium and technical, and superior and valuable. Through a comprehensive comparison, four groups whose images were similar were created. The outcome effectively reflects the potential consumer demands for smartphone rear camera patterns, providing insights for design practices in the smartphone industry.

Experimental investigation and optimization on field shaper structure parameters in magnetic pulse welding

2021 ◽  
pp. 095440542110148
Author(s):  
Yingzi Chen ◽  
Zhiyuan Yang ◽  
Wenxiong Peng ◽  
Huaiqing Zhang
Keyword(s):  
Magnetic Field ◽  
High Speed ◽  
Light Metal ◽  
Magnetic Pulse ◽  
Cross Sectional ◽  
Magnetic Pulse Welding ◽  
Pulse Welding ◽  
Sectional Shape ◽  
Welding System ◽  
The Magnetic Field

Magnetic pulse welding is a high-speed welding technology, which is suitable for welding light metal materials. In the magnetic pulse welding system, the field shaper can increase the service life of the coil and contribute to concentrating the magnetic field in the welding area. Therefore, optimizing the structure of the field shaper can effectively improve the efficiency of the system. This paper analyzed the influence of cross-sectional shape and inner angle of the field shaper on the ability of concentrating magnetic field via COMSOL software. The structural strength of various field shapers was also analyzed in ABAQUS. Simulation results show that the inner edge of the field shaper directly affects the deformation and welding effect of the tube. So, a new shape of field shaper was proposed and the experimental results prove that the new field shaper has better performance than the conventional field shaper.

scholarly journals Feasibility of Probing the Filler Restructuring in Magnetoactive Elastomers by Ultra-Small-Angle Neutron Scattering

2021 ◽  
Vol 11 (10) ◽  
pp. 4470
Author(s):  
Inna A. Belyaeva ◽  
Jürgen Klepp ◽  
Hartmut Lemmel ◽  
Mikhail Shamonin
Keyword(s):  
Magnetic Field ◽  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Iron Particles ◽  
Filler Particles ◽  
The Magnetic Field ◽  
Magnetoactive Elastomer

Ultra-small-angle neutron scattering (USANS) experiments are reported on isotropic magnetoactive elastomer (MAE) samples with different concentrations of micrometer-sized iron particles in the presence of an in-plane magnetic field up to 350 mT. The effect of the magnetic field on the scattering curves is observed in the scattering vector range between 2.5 × 10−5 and 1.85 × 10−4 Å−1. It is found that the neutron scattering depends on the magnetization history (hysteresis). The relation of the observed changes to the magnetic-field-induced restructuring of the filler particles is discussed. The perspectives of employing USANS for investigations of the internal microstructure and its changes in magnetic field are considered.

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