High Speed Face Milling Cutters Dynamic Response with Deformation

2012 ◽  
Vol 500 ◽  
pp. 186-191
Author(s):  
Fu Chun Tao ◽  
Guang Chao Chen ◽  
Bin Jiang ◽  
Bo Chen ◽  
Yan Ding
Keyword(s):  
Dynamic Response ◽  
Cutting Force ◽  
Dynamic Simulation ◽  
High Speed ◽  
Dynamic Performance ◽  
Field Research ◽  
Vibration Signal ◽  
Face Milling ◽  
Analysis Model

Based on the field research, we found that in the course of high-speed face milling aluminum, Cutters components prone to deformation as the role of load such as Centrifugal force, Cutting force and Preload. The deformation will directly affect the the dynamic performance of the cutter. So its necessary to reveal the dynamic response of the deformation cutter. We base on the Dynamic model and the modal analysis model, Obtained the deformation cutters dynamic simulation which the cutters deformation is come from the ANSYS. At last we got the method of identifying cutters deflection deformation by vibration signal. With the method we can effectively identifying milling distortion In the cutting process.

A Network Implementation of Real-Time Dynamic Simulation With Interactive Animated Graphics

1988 ◽  
Author(s):  
M. W. Dubetz ◽  
J. G. Kuhl ◽  
E. J. Haug
Keyword(s):  
Real Time ◽  
Dynamic Simulation ◽  
High Speed ◽  
Dynamic Performance ◽  
Data Communication ◽  
Computing System ◽  
Data Sets ◽  
Parallel Processor ◽  
Network Computing ◽  
Time Dynamic

Abstract This paper presents a network based implementation of real-time dynamic simulation methods. An interactive animated graphics environment is presented that permits the engineer to view high quality animated graphics rendering of dynamic performance, to interact with the simulation, and to study the effects of design variations, while the simulation is being carried out. An industry standard network computing system is employed to interface the parallel processor that carries out the dynamic simulation and a high speed graphics processor that creates and displays animated graphics. Multi-windowing and graphics processing methods that are employed to provide visualization and operator control of the simulation are presented. A vehicle dynamics application is used to illustrate the methods developed and to analyze communication bandwidth requirements for implementation with a compute server that is remote from the graphics workstation. It is shown that, while massive data sets are generated on the parallel processor during realtime dynamic simulation and extensive graphics data are generated on the workstation during rendering and display, data communication requirements between the compute server and the workstation are well within the capability of existing networks.

Dynamic Performance of Vehicle-Turnout-Bridge Coupling System in High-Speed Railway

2011 ◽  
Vol 50-51 ◽  
pp. 654-658
Author(s):  
Rong Chen ◽  
Wang Ping ◽  
Shun Xi Quan
Keyword(s):  
Relative Position ◽  
High Speed ◽  
Dynamic Performance ◽  
Dynamic Responses ◽  
Continuous Beam ◽  
Analysis Model ◽  
Wheel Load ◽  
System A ◽  
Coupling System ◽  
Contact Relation

In order to study dynamic behavior of vehicle-turnout-bridge coupling system, a vehicle-turnout-bridge dynamic analysis model is established by employing the dynamic finite element method (FEM). When No.18 crossover turnouts(with a speed of 350km/h) are laid symmetrically on the 6×32m continuous beam, influences of turnout/bridge relative position and wheel/rail contact relation in turnout zone on the system dynamic responses are analyzed. The result shows that: wheel/rail contact of turnout zone (especially the frog) has great effect on dynamic responses of turnout on bridge, thus the nose rail height of frog should be optimized to mitigate the wheel load transition and its longitudinal gradient. In terms of the 32m-span continuous beam, the best relative position is frog part of turnout arranged in the range of 1/8 and 1/4 of span.

scholarly journals Intervensi Komunitas Spedagi dalam Pemberdayaan Ekonomi Masyarakat Berbasis Potensi Lokal di Pasar Papringan Temanggung

2020 ◽  
Vol 1 (2) ◽  
pp. 159-171
Author(s):  
Dewi Ana Istianah ◽  
Nihayatuzzain Nihayatuzzain
Keyword(s):  
Field Research ◽  
Local Potential ◽  
Analysis Model ◽  
Online Data ◽  
Governmental Organization ◽  
Cultural Life ◽  
Collection Data ◽  
Qualitative Descriptive ◽  
The Impact

This paper discusses the role of a non-governmental organization and activist focusing on improving villages, the Spedagi community, in conducting empowerment in Ngadiprono Hamlet, Temanggung. The study aiming to also determine the impact of that empowerment was done through field research methods with a qualitative descriptive approach, while the data were collected through four techniques: interviews, observation, documentation and online data search. The analysis was carried out with the Miles and Huberman qualitative analysis model which included four stages: data collection, data reduction, data presentation and finally conclusion drawing and verification. The results of this study indicate that Spedagi has played a role as a community companion in Ngadiprono mainly in the economic empowering through the Papringan Market as an existing local potential, ncluding: facilitative, educational, representative, and technical roles and skills. In addition, the socio-economic and even cultural life in Ngadiprono is also benefiting from the program. Keywords:  Community economic empowerment, local potential, traditional market   Abstrak Makalah ini membahas peran organisasi non-pemerintah dan aktivis yang berfokus pada pemberdayaan desa, yaitu komunitas Spedagi, dalam melakukan pemberdayaan di Dusun Ngadiprono, Temanggung. Bertujuan juga untuk menentukan dampak pemberdayaan yang dilakukan, penelitian ini menggunakan metode penelitian lapangan dengan pendekatan deskriptif kualitatif, di mana data dikumpulkan melalui empat teknik: wawancara, observasi, dokumentasi, dan pencarian data secara daring. Analisis dilakukan dengan model analisis kualitatif Miles dan Huberman yang meliputi empat tahap: pengumpulan data, reduksi data, penyajian data, dan akhirnya penarikan kesimpulan dan verifikasi. Hasil penelitian ini menunjukkan bahwa Spedagi telah berperan sebagai pendamping masyarakat di Ngadiprono terutama dalam pemberdayaan ekonomi melalui Pasar Papringan sebagai potensi lokal yang ada, termasuk peran dan keterampilan fasilitatif, edukatif, representatif, dan teknis. Selain itu, kehidupan sosial ekonomi dan bahkan budaya di Ngadiprono juga mendapat manfaat dari program ini. Kata kunci: Pasar tradisional, pemberdayaan ekonomi masyarakat, potensi lokal

Study on the Pair’s Characteristics of Web Press’s Fold System in High Speed

2011 ◽  
Vol 311-313 ◽  
pp. 1398-1403
Author(s):  
Ying Cai Yuan ◽  
Yan Li ◽  
Yi Ming Wang
Keyword(s):  
Dynamic Response ◽  
Nonlinear Dynamic ◽  
High Speed ◽  
Dynamic Performance ◽  
Dynamics Model ◽  
Nonlinear Dynamic Response ◽  
Response Characteristics ◽  
Fold System ◽  
Main Factors ◽  
Dynamic Response Characteristics

In high speed, the web press’s fold mechanism appears nonlinear dynamic response characteristics, which seriously affect the fold system’s stability and precision. The clearance and roller’s deformation are the main factors to cause the nonlinear dynamic response. To study the influence of clearance and roller’s deformation, the hypothesis of rigid role and spring combination is put forward. Based on the hypothesis, the dynamics model of fold system with clearance is established by kinematics and dynamics analysis. Through the dynamics model of fold system, the situation of pair clearance and roller’s deformation can be obtained, and the influence to the dynamic performance of fold system can be easily got.

EFFECT OF TRUCK COLLISION ON DYNAMIC RESPONSE OF TRAIN–BRIDGE SYSTEMS AND RUNNING SAFETY OF HIGH-SPEED TRAINS

2013 ◽  
Vol 13 (03) ◽  
pp. 1250064 ◽  
Author(s):  
CHAOYI XIA ◽  
HE XIA ◽  
NAN ZHANG ◽  
WEIWEI GUO
Keyword(s):  
Dynamic Response ◽  
High Speed ◽  
Dynamic Responses ◽  
Illustrative Case ◽  
Analysis Model ◽  
Box Girders ◽  
Running Safety ◽  
High Speed Trains ◽  
Safety Indices

A dynamic analysis model is established for a coupled high-speed train and bridge system subjected to collision loads. A 5 × 32 m continuous high-speed railway bridge with PC box girders is considered in the illustrative case study. Entire histories of a CRH2 high-speed EMU train running on the bridge are simulated when the truck collision load acts on the bridge pier, from which the dynamic responses such as displacements and accelerations of the bridge, and the running safety indices such as derailment factors, offload factors and lateral wheel/rail forces of the train are computed. For the case study, the running safety indices of the train at different speeds on the bridge when its pier is subjected to a truck collision with different intensities are compared with the corresponding allowances of the Chinese Codes. The results show that the dynamic response of the bridge subjected to truck collision loads is much greater than the one without collision, which can drastically influence the running safety of high-speed trains.

Cutting Force in High-Speed Face Milling AISI H13 Steel

2015 ◽  
Vol 667 ◽  
pp. 35-40
Author(s):  
Xiao Bin Cui ◽  
Jing Xia Guo ◽  
Xiao Yang Wang
Keyword(s):  
Cutting Force ◽  
High Speed ◽  
Cutting Speed ◽  
Cutting Parameters ◽  
Face Milling ◽  
Depth Of Cut ◽  
H13 Steel ◽  
Aisi H13 Steel ◽  
Aisi H13 ◽  
Axial Depth

For the purpose of acquiring thorough understanding of the characteristics of cutting force in high and ultra-high-speed face milling of hardened steel, experimental investigations on face milling of AISI H13 steel (46-47 HRC) are conducted in the present study. The cutting speed of 1400 m/min, at which relatively low cutting force and relatively low surface roughness can be obtained at the same time, is considered as a critical value for both mechanical load and surface finish. The Taguchi method is applied to investigate the effects of cutting parameters on cutting force in different speed ranges (below and above 1400 m/min). In different speed ranges, the contribution order of the cutting parameters for the resultant cutting force is the same, namely axial depth of cut, cutting speed and feed per tooth. However, the contributions of cutting speed and feed per tooth increase substantially as the cutting speed surpasses 1400 m/min. Within the range of cutting parameters used in the present study, the optimum cutting conditions for the cutting force are cutting speed 200 m/min, feed per tooth 0.02 mm/tooth and axial depth of cut 0.1 mm.

Stability of High Speed Milling Based on Instantaneous Cutting Force

2012 ◽  
Vol 152-154 ◽  
pp. 404-408
Author(s):  
Hong Liang Zhou ◽  
Wei Xiao Tang ◽  
Qing Hua Song
Keyword(s):  
Cutting Force ◽  
High Speed ◽  
End Milling ◽  
Element Model ◽  
Face Milling ◽  
Force Model ◽  
Dynamics Model ◽  
High Speed Milling ◽  
High Productivity ◽  
Rotating Speed

High-speed milling (HSM) has advantages in high productivity high precision and low production cost. Thus it can be widely used in the manufacture industry. However, when the speed of spindle-tool reaches a higher speed range, the gyroscopic effect will become an important part of its stable milling. In this paper, a dynamics model of HSM system was proposed considering the influence of gyroscopic moment due to high rotating speed of end milling. Finite element model (FEM) is used to model the dynamics of a spindle-milling system. It obtains the trajectory of central point in face milling with considering gyroscopic effects through the dynamics model at high speeds. Then the cutting force model will be corrected by the trajectory of face milling. Then the stability lobes diagrams (SLD) was elaborated. Cutting thickness effects have non-negligible impact on stability limitation.

Vibration Forecast and Vibration Attenuation Research of the Finished Motorcycle Based on Virtual Analysis

2014 ◽  
Vol 705 ◽  
pp. 122-125
Author(s):  
Zi Qing Meng ◽  
Ming Li
Keyword(s):  
Finite Element ◽  
Dynamic Response ◽  
High Speed ◽  
Structural Characteristics ◽  
Element Model ◽  
Analysis Model ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Vibration Attenuation ◽  
Response Equation

as the high-speed vehicle, motorcycle vibration has an important influence on driving security, comfort, and handling stability. Therefore, this article builds the finite element analysis model of vibration forecast and damping of the finished motorcycle based on the structural characteristics. The major contents include main part modeling, boundary condition, and the finite element model of the finished motorcycle. In the paper, we build the finite dynamic response equation through analyzing the dynamic response, and research the resonance from different directions that caused by the engine harmonic response. Moreover, this article provides the vibration attenuation plan of the motorcycle structural modification and proves the feasibility through the analog computation and experimental measurement.

Role of tendon properties on the dynamic performance of different isometric muscles

1993 ◽  
Vol 74 (3) ◽  
pp. 1348-1355 ◽  
Author(s):  
K. Roeleveld ◽  
R. V. Baratta ◽  
M. Solomonow ◽  
A. G. van Soest ◽  
P. A. Huijing
Keyword(s):  
Dynamic Response ◽  
Rate Increase ◽  
Dynamic Performance ◽  
Motor Units ◽  
Isometric Tension ◽  
Medial Gastrocnemius ◽  
Response Models ◽  
Before And After ◽  
Tendon Properties

The effect of the tendon's viscoelastic stiffness on the dynamic performance of muscles with different architecture was determined using the cat's medial gastrocnemius and extensor digitorum longus. Dynamic response models were derived under sinusoidal contraction-relaxation in the range of 0.4 (556.0 Hz and between 20 and 80% of the muscles' maximal isometric tension, manipulated by orderly recruitment-derecruitment of motor units together with firing rate increase-decrease. It was shown that, for isometric contractions at the muscle's optimum length, the dynamic response of the muscles was not significantly different before and after dissection of the tendon. Therefore the conclusion that under these conditions the tendon acts like a stiff force transmitter without significantly modifying the muscle's performance was confirmed and extended to muscles with different architecture.

Three-Dimensional Finite Element Analysis Model of High-Speed Train-Track-Bridge Dynamic Interactions

2005 ◽  
Vol 8 (5) ◽  
pp. 513-528 ◽  
Author(s):  
Yong-Seon Lee ◽  
Sang-Hyo Kim ◽  
Jun Jung
Keyword(s):  
Dynamic Response ◽  
High Speed ◽  
Coupling Effect ◽  
Resonance Effect ◽  
Three Dimensional ◽  
Dynamic Responses ◽  
Railway Track ◽  
Railway Bridge ◽  
Analysis Model ◽  
Element Analysis

The dynamic behavior is a complicated characteristic in analysis of a railway bridge when it is incorporated with the effect of railway track. Even though it is not an ignorable component, the coupling effect with the railway track in the dynamic response of a railway bridge has been ignored or just simplified in the past researches. Therefore, this study conducts a numerical analysis of track effect on the railway bridge, and the comparison between the dynamic responses with three-dimensional (3D) discrete support track model and those without it is examined. Dynamic amplitude incorporated with 3D track model is decreased when the train velocity goes up over 250 km/h. This phenomenon shows that the resonance effect has been shifted by the 3D track model, which results in the changes in dynamic characteristics of a railway bridge. Consequently, the coupling effect between bridge and track should be taken account for in the analysis of dynamic response of a railway bridge.

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