Computer simulation of metal removal from machine parts during centrifugal rotation processing

2020 ◽  
Keyword(s):  
Processing Time ◽  
Flat Surface ◽  
Metal Removal ◽  
Abrasive Particle ◽  
Dynamic Contact ◽  
Pressure Force ◽  
Modeling And Analysis ◽  
Machine Parts ◽  
Metal Processing ◽  
Surface Layer Quality

The modeling and analysis of the metal removal process at centrifugal-rotational processing of parts in an abrasive discrete medium are considered in this article. The interaction of a single abrasive particle with a flat surface of the part is considered. The relation between workpiece metal removal and parameters of contact interaction — pressure force, processing time, sliding speed — is researched. Keywords metal removal from the surface of the part; abrasive metal processing; centrifugal rotation processing; surface layer quality; dynamic contact task; finite element method (FEM)

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.

Swirling Fluidized Bed Polishing: A New Non-Conventional Method of Surface Modification

2015 ◽  
Vol 813-814 ◽  
pp. 634-640
Author(s):  
N.K. Francis ◽  
K.G. Viswanadhan ◽  
M.M. Paulose
Keyword(s):  
Surface Modification ◽  
Fluidized Bed ◽  
Metal Removal ◽  
Complex Geometry ◽  
Removal Rate ◽  
Abrasive Particle ◽  
Surface Finishing ◽  
Polished Surface ◽  
Work Piece ◽  
Machining Accuracy

Swirling Fluidized Bed Polishing (SFBP) is a non–traditional alternative abrasive flow surface finishing form of Fluidized Bed Machining (FBM) in which the former has special features to overcome certain significant limitations of the latter, namely the variation of the surface roughness vertically along the component surface and the screening effect owing to the complex contours in the work piece geometry. Owing to its ability to perform machining and generate polished surface from a roughness value of Ra 1.2μ to 0.2 μ within 8 hours of processing, this new method offers greater scope in the surface modification of rough machined surfaces with complex geometry such as component with ducts and grooves. This research focus on investigating the effect of abrasive particle concentration on metal removal rate per unit area of the specimen surface. 3D surface morphology analysis investigates the quality of the polished surface and the study of circumferential uniformity and machining accuracy analysis on a complex-contoured component further investigate its scope and relevance in industrial applications.

Formation of quality indicators for flat surfaces of machine parts when running them with a reinforcing roller

2021 ◽  
pp. 401-405
Author(s):  
V.I. Butenko ◽  
Ph.A. Pastukhov
Keyword(s):  
Quality Indicators ◽  
Flat Surface ◽  
Rolling Force ◽  
Functional Dependence ◽  
Roughness Parameter ◽  
Technological Problem ◽  
Flat Surfaces ◽  
Machine Parts ◽  
Rolling Mode

The forming of parameters of quality of parts flat surfaces during their rolling by strengthening roller is studied and it is shown that for each value of rolling force there are extremely achievable indicators of quality of the surface layer. It has been established that the spread of quality indicators values on the strengthened surface of the part is stabilized and becomes minimal after three passes of the roller. The functional dependence of the roughness parameter value of the part flat surface on it’s previous value and rolling mode is obtained, which allows solving a number of technological problem.

Nesting Scheduling in Sheet Metal Processing Based on Coevolutionary Genetic Algorithm in Different Environments

2018 ◽  
Vol 12 (5) ◽  
pp. 730-738 ◽  
Author(s):  
Tatsuhiko Sakaguchi ◽  
◽  
Kohki Matsumoto ◽  
Naoki Uchiyama
Keyword(s):  
Genetic Algorithm ◽  
Sheet Metal ◽  
Processing Time ◽  
Factors Affecting ◽  
Fitness Value ◽  
Evolutionary Genetic ◽  
Scheduling Method ◽  
Grouping Method ◽  
Metal Processing ◽  
Coevolutionary Genetic Algorithm

In sheet metal processing, nesting and scheduling are important factors affecting the efficiency and agility of manufacturing. The objective of nesting is to minimize the waste of material, while that of scheduling is to optimize the processing sequence. As the relation between them often becomes a trade-off, they should be considered simultaneously for the efficiency of the total manufacturing process. In this study, we propose a co-evolutionary genetic algorithm-based nesting scheduling method. We first define a cost function as a fitness value, and then we propose a grouping method that forms gene groups based on the processing layout and processing time. Finally, we validate the effectiveness of the proposed method through computational experiments.

Technological quality assurance of the surface layer and operational properties of machine parts by electroerosion treatment

2021 ◽  
Vol 2021 (11) ◽  
pp. 30-37
Author(s):  
Sergey S'yanov
Keyword(s):  
Wear Resistance ◽  
Surface Layer ◽  
Corrosion Rate ◽  
Endurance Limit ◽  
Mechanical Parameters ◽  
Technological Support ◽  
Technological Quality ◽  
Machine Parts ◽  
Surface Layer Quality

Dependences for determining geometric, physical and mechanical parameters of the surface layer quality, wear resistance, corrosion rate and endurance limit depending on the modes and conditions of electroerosion treatment of machine parts have been given. These dependences allow determining optimal modes and conditions of electroerosion treatment to ensure the required parameters of the quality of the surface layer (with a two–stage approach - design and technological support of operational properties), wear resistance, corrosion rate and endurance limit (with a single-stage approach - direct technological support).

Stochastic Modeling and Analysis of Abrasive Flow Machining

1992 ◽  
Vol 114 (1) ◽  
pp. 74-81 ◽  
Author(s):  
R. E. Williams ◽  
K. P. Rajurkar
Keyword(s):  
Stochastic Modeling ◽  
Surface Characterization ◽  
Metal Removal ◽  
Removal Rate ◽  
Surface Profile ◽  
Process Performance ◽  
Modeling And Analysis ◽  
Abrasive Flow Machining ◽  
Real Roots ◽  
Number Of Cycles

Finishing operations in the metal working industry represent a critical and expensive phase of the overall production process. A new process called Abrasive Flow Machining (AFM) promises to provide the accuracy, efficiency, economy, and the possibility of effective automation needed by the manufacturing community. The AFM process is still in its infancy in many respects. The process mechanism, parametric relationships, surface integrity, process control issues have not been effectively addressed. This paper presents preliminary results of an investigation into some aspects of the AFM process performance, surface characterization, and process modeling. The effect of process input parameters (such as media viscosity, extrusion pressure, and number of cycles) on the process performance parameters (metal removal rate and surface finish) are discussed. A stochastic modeling and analysis technique called Data Dependent Systems (DDS) has been used to study AFM generated surface. The Green’s function of the AFM surface profile models provides a “characteristic shape” that is the superimposition of two exponentials. The analysis of autocovariance of the surface profile data also indicates the presence of two real roots. The pseudo-frequencies associated with these two real roots have been linked to the path of the abrasive grains and to the cutting edges of the grain. Furthermore, expressions have been proposed for estimating the abrasive grain wear and the number of grains actively involved in cutting with a view towards developing indicators of media batch life. A brief introduction to the AFM process and related research is also included in this paper.

INVESTIGATIONS OF TECHNOLOGICAL PARAMETERS IMPACT UPON QUALITY FORMATION IN SURFACE LAYER OF PARTS AT CENTRIFUGAL ROTARY PROCESSING

2021 ◽  
Vol 2021 (8) ◽  
pp. 4-13
Author(s):  
Mihail Tamarkin ◽  
Elina Tischenko ◽  
Van Nguen ◽  
Aleksey Mordovcev
Keyword(s):  
Surface Layer ◽  
High Speed ◽  
Metal Removal ◽  
Experimental Investigations ◽  
Technological Parameters ◽  
Motion Speed ◽  
Maximum Penetration ◽  
Definition Of ◽  
Surface Layer Quality ◽  
The Impact

In the paper there are carried out investigations on the definition of the basic technological parameters impact of centrifugal-rotary processing in abrasive environment upon formation of surface layer quality in the parts worked. There is used a finite element method of deformation modeling in granulated massive rotating under the impact of centrifugal forces with the use of the (Comsol Multiphysics) packet. On the basis of computer the high-speed shooting processing and theoretical investigations of the process dynamics there are defined distributions of pressures and granule motion speed in the working chamber. A specified model of abrasive granule encounter with the surface worked at the centrifugal rotary processing on the basis of the modern researches and analysis with the use of the Ansys software. The dependences are obtained for the definition of the maximum penetration depth of environment particles into the surface of the part worked, metal removal, surface roughness which adequacy is confirmed by the results of experimental investigations. There is developed a specified procedure for the computation of roughness height parameters of the surface worked and machining capacity. A specified procedure for the computation of metal removal from the surface worked of parts is offered. An algorithm for the optimization of an engineering process is developed. The investigation results are introduced into production.

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