scholarly journals Modeling metal removal from workpiece surface during centrifugal rotation processing

2021 ◽  
Vol 2131 (5) ◽  
pp. 052030
Author(s):  
N Van Tho ◽  
A Soloviev ◽  
M Tamarkin
Keyword(s):  
Contact Interaction ◽  
Metal Removal ◽  
Abrasive Particle ◽  
Three Dimensional ◽  
Technological Parameters ◽  
Machining Time ◽  
Workpiece Surface ◽  
Modeling And Analysis ◽  
Three Dimensional Modeling ◽  
Removal Of Metal

Abstract The modeling and analysis the removal of metal process in centrifugal rotational processing of workpiece in abrasive medium are considered in this article. The single contact interaction process between abrasive particle and the workpiece surface is researched through three-dimensional modeling taking into account dry coefficient of friction. The contact interaction problem is solved through Ansys software and Archard code programmed to analyze the data. The removal of metal from the workpiece surface is researched when changing the technological parameters: friction coefficient, machining time, speed. The dependences between metal removal from the workpiece surface and technological parameters are constructed, from which reasonable parameters can be selected when machining the workpiece, allowing to achieve high accuracy. Experimental results have been confirmed by simulation results. Through this research, essential and important data sheets will be provided for actual production and testing activities. Consequently, time and money are saved in achieving the desired surface quality.

scholarly journals STRUCTURAL DEVELOPMENT AND RESEARCH OF TECHNOLOGICAL PARAMETERS OF MACHINES FOR CENTRIFUGAL -PLANETARY VIBRATION TREATMENT

2020 ◽  
pp. 41-50
Author(s):  
Leonid Yaroshenko ◽  
Igor Kupchuk ◽  
Mykhailo Zamrii
Keyword(s):  
High Efficiency ◽  
Metal Removal ◽  
Three Dimensional ◽  
High Hardness ◽  
Working Environment ◽  
Repeated Loading ◽  
Structural Development ◽  
Technological Parameters ◽  
Advantages And Disadvantages ◽  
Wide Range

The paper analyzes current state and prospects of further development of technology and equipment for mechanization and automation of finishing and cleaning of details. It is stated that the most effective for this purpose are the methods of abrasive machining, which include bulk galvanizing, vibration, centrifugal-rotary and centrifugal-planetary processing. These methods reduce the complexity and cost of processing, which in some cases reaches 20% of the total cost of manufacturing parts. Each of these methods has a different level of efficiency, certain advantages and disadvantages, the level of versatility and scope of effective application. The processes of vibration processing are quite deeply studied, for its industrial mass-produced technological equipment, but they have certain shortcomings that limit their use for further widespread implementation. Centrifugal-rotary processing is a more productive process of three-dimensional finishing and cleaning treatment, but its scope is limited by the possibility of processing parts that are not complex, usually flat. The most productive methods of finishing and cleaning of details include centrifugal-planetary volume processing which high efficiency is caused by repeated loading of particles of working load by inertial forces that creates preconditions for the solutions of a wide range of technological problems, for example, processing of details of difficult form, small weight and the sizes from materials of high hardness or viscosity that represents a serious problem for other methods of volume processing. The constructive scheme is offered in the work and the influence of the composition of the abrasive free-granular working environment on the productivity of the machine for centrifugal-planetary processing of details is investigated. The kinetics of metal removal from the surface of machined parts using different types of abrasive working environment is analyzed. The results of comparative machining of parts in a torus vibrating machine and a machine for centrifugal-planetary machining are given. It is shown that the simultaneous use of centrifugal-planetary and vibration processing methods allows to increase the intensity of the process while ensuring high quality machining of parts of relatively complex shape. The constructive scheme of the machine which allows to implement the specified combined method of processing is offered and described.

scholarly journals Formation of practical skills modeling and printing of three-dimensional objects in the process of professional training of IT specialists

2020 ◽  
Vol 166 ◽  
pp. 10016
Author(s):  
Ihor Hevko ◽  
Olha Potapchuk ◽  
Taras Sіtkar ◽  
Iryna Lutsyk ◽  
Pavlo Koliasa
Keyword(s):  
Sustainable Development ◽  
Professional Training ◽  
Three Dimensional ◽  
Professional Competencies ◽  
Practical Skills ◽  
Technological Parameters ◽  
Three Dimensional Objects ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
3D Printers

The article discusses the current technology of three-dimensional modeling and prospects for its implementation in the structure of the modern system of professional training of IT specialists according to the concepts of sustainable development. The problems have been actualized and the methodology for three-dimensional modeling and printing has been proposed by using modern software, in particular, the features of using the basic core of geometric design and software preparation of the model for printing have been presented. An algorithm for the formation of practical skills of students in hardware preparation and calibration of 3D printers, the adjustment of the main technological parameters of work, preparation for the manufacture of a spatial model has been proposed. The developed algorithm promotes to the formation of practical skills of modeling and printing three-dimensional objects in future IT-specialists of vocational education, contributes to the formation of their professional competencies. In turn, this contributes to the formation of professional competencies among future IT specialists and creates the need for systematic improvement of knowledge and their creative implementation in practice with a more efficient use of IT technologies, which is the basis in solving the problems of sustainable development of society.

Three Dimensional Virtual Modeling and Analysis Methods of Embedded Drivetrains

2009 ◽  
Author(s):  
Steven Mulski ◽  
Lutz Mauer
Keyword(s):  
System Analysis ◽  
Three Dimensional ◽  
Fast Fourier Transformation ◽  
Modeling And Analysis ◽  
Transfer Path ◽  
Three Dimensional Modeling ◽  
Analysis Methods ◽  
Virtual Models ◽  
Durability Analysis ◽  
Virtual Modeling

Drivetrains are a major source of vibration, noise and system failures. Accordingly, a significant amount of time and effort is being invested developing simulation methods in order to better understand and avoid potentially damaging vibrations, even before prototypes are created for testing. The first step in simulating any drivetrain is creating suitable virtual models to investigate particular phenomena. Too much model detail leads to long computation times and difficulties in interpreting results, while too little may fail to include desired effects. Because the various levels of detail available in multi-body simulation (MBS) are practically limitless, a significant amount of attention must be given in order to choose the appropriate modeling elements. In the simplest form an entire drivetrain can be modeled as several rigid masses connected with torsional springs, which is justifiable for fundamental concept analyses. For other analyses, full three dimensional modeling with complex components may be necessary. Higher frequency analyses may even necessitate the inclusion of material bending for achieving accurate results. The various available elements for modeling specific components must be well understood in order that appropriate choices are made. Modeling requirements for the elements commonly used in the simulation of drivetrains will be discussed. For example: bearings, gearwheels, universal and constant velocity joints, frequency and amplitude dependent mounts, flexible components (e.g. shafts and gearbox housings), etc. Once virtual models are available, various analysis methods are applied in order to aid designers in identifying and quantifying potentially damaging vibrations. Again the application and limitation of these methods must be well understood in order to generate meaningful results. The following methods will be compared and discussed: resonance analysis, linear system analysis, run-up Fast Fourier Transformation analysis, order analysis, transfer path analysis and durability analysis. These drivetrain modeling techniques and analysis methods are not limited to any specific field of engineering, but can be applied to an extensive range of engineering disciplines. Analyses applied to virtual models out of the automotive and wind turbine sectors will be shown.

Research on Modeling and Visualization Method of Geological Objects Based on VRML

2013 ◽  
Vol 448-453 ◽  
pp. 3766-3771
Author(s):  
Chang Yang ◽  
Hao Li ◽  
Peng Gao ◽  
Yu Feng Mao ◽  
Rong Chun Zhang
Keyword(s):  
Three Dimensional ◽  
Visualization Method ◽  
Analysis Software ◽  
Cross Sectional ◽  
Modeling And Analysis ◽  
Modeling Methods ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
Modelling Method ◽  
Real Time Visualization

Geological strata conditions is restriction to the design and construction of projects .The significance of three-dimensional modeling of engineering rock mass is obviously for both construction and monitoring.However,the existing three-dimensional modeling methods have the disadvantages of low productivity and huge amounts of data . Focusing on these problems, a fast modelling method used to build geological model is presented in this paper. Compared with the special geological 3D modeling and analysis software ,VRML has many merits such as flexible visualization method, good transplantation of the visualization achievements , and independent platform . VRML also has the feasibility of low-bandwidth and the real-time visualization and browsing of the models .It is well suited to the visualization requirement of drilling data and cross-sectional data ,and provides a new solution for the realization of the geological visualization.

Establishment and Application of the Platform for Reverse Solution and Parametric Design Platform of the Conjugate Cam Beating-up Mechanism

2011 ◽  
Vol 332-334 ◽  
pp. 303-308
Author(s):  
Jian Neng Chen ◽  
Ying Wang ◽  
Xiong Zhao ◽  
Wan Huan Lin
Keyword(s):  
Parametric Design ◽  
Structural Parameters ◽  
Three Dimensional ◽  
Secondary Development ◽  
Motion Simulation ◽  
Technological Parameters ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
Processing Data ◽  
The Mathematical Model

In order to realize the parametric design of the conjugate cam beating-up mechanism, on the basis of the technological parameters of beating-up mechanism, ideal kinematical curves of the beating-up mechanism are builded, and the mathematical model of reverse solution for this mechanism is established. The parameters of this beating-up mechanism are obtained by reverse solution according to the kinematic requirements and the constructed ideal kinematic curves. The secondary development of UG is conducted based on VB.NET, the parametric design platform which is integrated with the functions of parametric reverse solution, motion simulation, three-dimensional modeling and virtual assembly is built. After entering the technological parameters of beating-up and essential structural parameters by users, the three-dimensional drawing of main parts such as the conjugate cam and shaft, can be obtained by this platform, also the processing data of the cam can be calculated. This platform provides a rapid approach for the parametric design of beating-up mechanism.

scholarly journals Three-dimensional modeling and analysis of a high energy density Kelvin-Helmholtz experiment

2012 ◽  
Vol 19 (9) ◽  
pp. 092112 ◽  
Author(s):  
K. S. Raman ◽  
O. A. Hurricane ◽  
H.-S. Park ◽  
B. A. Remington ◽  
H. Robey ◽  
...  
Keyword(s):  
Energy Density ◽  
Three Dimensional ◽  
High Energy ◽  
High Energy Density ◽  
Modeling And Analysis ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling

THERMOMECHANICAL MODELING OF ELECTRONIC PACKAGES

2011 ◽  
Vol 02 (01) ◽  
pp. 45-66 ◽  
Author(s):  
N. JAGANNATHAN ◽  
R. PALANINATHAN
Keyword(s):  
Heat Dissipation ◽  
Thermal Stresses ◽  
Three Dimensional ◽  
Stress Fields ◽  
Electronic Packages ◽  
Gauss Point ◽  
Modeling And Analysis ◽  
Three Dimensional Modeling ◽  
Solder Balls ◽  
Thermomechanical Modeling

This paper is concerned with an integrated thermomechanical modeling and analysis of electronic packages. As the technology advances in terms of speed and density of circuit within a chip, the power dissipation increases exponentially. The packages are subjected to heating during fabrication, testing, and service. Due to the heterogeneous construction with wide mismatch of material properties, thermal stresses are induced which would result in mechanical failures such as cracking and delamination. It is essential to analyze the packages for thermal and stress fields and check their compliance with the design requirements. Earlier investigations were mostly based on approximate models such as plane-stress, plane-strain, and axisymmetric conditions. In reality, none of the packages satisfies the conditions associated with these models. In this work, 3D solid finite element with variable nodes, 8–21 nodes per element is employed. Software has been developed with the following features: sequentially coupled thermomechanical modeling, nonlinear transient solution capability, incompatible mode option when 8-node brick element is used, better estimation of nodal stresses by transformation from gauss point stresses, and quadratic criterion for delamination failure. A flipchip has been analyzed using the software developed for their thermal and stress fields. Numerical results indicate: the junction temperatures exceed the specification limits for higher heat dissipation, if appropriate cooling is not applied. The stresses in the die corner and at the solder balls are critical. Three-dimensional modeling is necessary for estimation of the same. Appropriate failure criterion was used in the failure prediction.

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