Mathematical modeling of the influence of cutting mode parameters on the quality of machined surfaces from aluminum alloys

2020 ◽  
pp. 55-57
Author(s):  
M.G. Galkin ◽  
A.S. Smagin ◽  
A.S. Pupyireva
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Model ◽  
Surface Roughness ◽  
Aluminum Alloys ◽  
Experimental Design ◽  
Manufacturing Process ◽  
Machined Surfaces

An algorithm for the development of a mathematical model of cutting processing, as a multifactorial process, which determines the influence of significant parameters of the cutting mode on the roughness of the processed surface, is proposed. In the development of the algorithm, the method of extreme experimental design is used. Keywords cutting, mode, manufacturing process, surface roughness, mathematical model. [email protected]

Feeding Mathematical Modeling of Superalloy Vacuum-Electromagnetic Casting and its Application

2012 ◽  
Vol 629 ◽  
pp. 171-175
Author(s):  
Wen Zhong Jin ◽  
Su Fang Li ◽  
Wei Zhang
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Model ◽  
New Technology ◽  
Experimental Results ◽  
Electromagnetic Stirring ◽  
Shrinkage Cavity ◽  
Vacuum Casting ◽  
Electromagnetic Casting ◽  
Wide Range

The new technology of superalloy vacuum-electromagnetic casting was developed and the feeding mathematical model melt in vacuum-electromagnetic casting was established. The availability of mathematical model was approved by the experiments of the IN100 superalloy. The experimental results indicate that the feeding capacity of melt in vacuum casting can be greatly increased by imposing the 50Hz, 60A rotating electromagnetic stirring, which can decrease the central shrinkage cavity in superalloy ingots, so the quality of the superalloy ingots can be wide-range improved.

Influence of Cutting Parameters on the Surface Quality of Round Parts Made from AZ61 Magnesium Alloy and Machined by Turning

2013 ◽  
Vol 837 ◽  
pp. 128-134 ◽  
Author(s):  
Gheorghe Mustea ◽  
Gheorghe Brabie
Keyword(s):  
Surface Roughness ◽  
Experimental Investigation ◽  
Magnesium Alloy ◽  
Surface Quality ◽  
Feed Rate ◽  
Cutting Speed ◽  
Cutting Parameters ◽  
Az61 Magnesium Alloy ◽  
Machined Surfaces

The use of magnesium alloys in construction of different components of the mechanical systems (such: cars, aerospace vehicles, medical equipment etc.) is very efficient not only because it leads to reduction of the systems weight but also because it leads to reduction or elimination of the environment polluting and to reduction of the energy consumption. Generally, the main factors that influence the quality of the machined surfaces are as follows: cutting parameters, material properties, geometry of the tools, cooling liquids and lubricants, physical and mechanical properties of the subsurface layers etc. Among the above mentioned factors, cutting parameters are the factors that strongly influence the quality of the machined surfaces. The present paper analysis the results of the experimental investigation performed to determine the influence of cutting parameters (cutting speed, feed rate and cutting depth) on the surface quality machined by turning the AZ61 magnesium alloy. The main characteristics of the machined surface quality analyzed in experimental investigation were the surface roughness and hardness. The main conclusions resulted from the results analysis were as follows: the decrease of the feed rate led to surface roughness decrease and hardness increase; the increase of the cutting speed also led to an improved surface quality.

Researches Regarding the Influence of Cutting Regime on Processed Surface in Aluminum Alloys Turning Process

2015 ◽  
Vol 808 ◽  
pp. 15-20
Author(s):  
Adrian Trif ◽  
Marian Borzan ◽  
Alexandru Popan ◽  
Domniţa Fraţilă ◽  
Adriana Rus ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Surface Roughness ◽  
Aluminum Alloy ◽  
Aluminum Alloys ◽  
Statistical Method ◽  
Surface Quality ◽  
Feed Rate ◽  
Cutting Speed ◽  
Cutting Parameters ◽  
Turning Process

The main purpose of this paper is to analyze the influence of cutting regime parameters in case of dry turning of an aluminum alloy. For turning process of the aluminum alloy was used Sandvik insert DCGX 11 T3 08 Al H10. The influence of the main cutting parameters on the surface quality was analyzed using a statistical method (ANOVA) used to test differences between two or more means. Based on a mathematical model can be calculated the surface roughness taking into account the cutting speed, the feed rate and the depth of cutting.

scholarly journals Optimization Research of Machining Parameters for Cutting GH4169 Based on Tool Vibration and Surface Roughness under High-Pressure Cooling

Materials ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 7861
Author(s):  
Yali Zhang ◽  
Mingyang Wu ◽  
Keke Liu ◽  
Jianyu Zhang
Keyword(s):  
Mathematical Model ◽  
Surface Roughness ◽  
High Pressure ◽  
Feed Rate ◽  
Support Vector ◽  
Machining Parameters ◽  
Cutting Depth ◽  
Tool Vibration ◽  
Cutting Speeds

The nickel-based superalloy is widely used in aerospace. It is a typical difficult-to-cut material with poor plasticity. During the cutting process, the fluctuation of the cutting force caused by the change of cutting conditions can aggravate tool vibration, thereby reducing the surface quality of the machined workpiece. However, the emergence of high-pressure cooling technology provides technical support for overcoming the difficulty in superalloy processing. Therefore, it is of great significance to optimize the tool vibration and surface roughness of cutting GH4169 under high-pressure cooling. Taking GH4169 as the research object, the single-factor and orthogonal high-pressure cooling cutting experiments were conducted firstly in this paper. Then, the methods of the main effect diagram and response surface were applied to analyze the impact of cutting speed, feed rate, cutting depth, and cooling pressure on the three-way tool vibration. Next, MATLAB was adopted to draw the frequency spectrum of radial tool vibration at different cutting speeds, and the relationship between chip morphology, tool vibration, and workpiece surface roughness at different cutting speeds was discussed. Based on this, a mathematical model of radial tool cutting vibration and surface roughness related to the cutting amount and cooling pressure was established. Support vector machine (SVM) was applied to make predictions. Meanwhile, the non-dominated sorting genetic algorithm with an elitist strategy was adopted for multi-objective optimization, and the optimization results were verified through experiments. The results indicated that the feed rate and cutting depth had a great impact on the tool vibration and surface roughness. The established mathematical model was accurate and effective for optimizing the cutting parameters. These results are of great significance to improve the cutting stability and the quality of machined surface.

scholarly journals Technological assurance of the quality of processing of products from aluminum alloys with a complex geometric shape using magnetic abrasive processing

2021 ◽  
Vol 326 ◽  
pp. 00033
Author(s):  
Dmitriy Maksimov ◽  
Radmila Shcheglova ◽  
Dmitriy Klochkov
Keyword(s):  
Surface Roughness ◽  
Aluminum Alloys ◽  
Theoretical Study ◽  
Geometric Shape ◽  
Exponential Dependence ◽  
Corrosion Resistant ◽  
Complex Geometric Shape ◽  
Complex Shapes

In the presented article, the issue of the implementation of magnetic abrasive processing is considered in order to ensure the quality of surfaces of complex shapes of parts made of corrosion-resistant aluminum alloys. The implementation was carried out through theoretical and experimental research. In a theoretical study, the features of processing corrosion-resistant aluminum alloys, existing and possible schemes for magnetic-abrasive processing of surfaces of complex geometric shapes, including a combination of various working movements of the workpiece and pole pieces, are considered. In an experimental study, the dependence of the quality of the processed surface (roughness) on the size of the working gap between the workpiece and the working pole was determined. The result of the research is the determination of the optimal treatment schemes for surfaces with a complex geometric shape, as well as the derived exponential dependence of the change in surface roughness on the size of the working gap.

scholarly journals Effect of Cutting Condition on the Surface Roughness Level of ST 42 Steel in Conventional Lathe Processes

2020 ◽  
Vol 2 (3) ◽  
pp. 11-20
Author(s):  
Doni Hamdani ◽  
Irzal Irzal ◽  
Nofri Helmi ◽  
Rifelino Rifelino
Keyword(s):  
Surface Roughness ◽  
Manufacturing Process ◽  
Research Process ◽  
Cutting Conditions ◽  
Cutting Condition ◽  
Cutting Depth ◽  
Average Roughness ◽  
Cutting Angle

Cutting conditions carried out in the turning or manufacturing process will have an impact on the quality of the components produced. One indicator of the quality of turning or manufacturing is surface roughness on the object. The purpose of this research is to determine the ratio of the level of surface roughness of ST 42 steel after conventional turning with different cutting conditions by varying the main cutting angle and cutting depth and its effect on the rate of wasted material (MRR). The main cutting angles used in this study were Kr 90, 80, 70 and variations in cutting depth of 0.5 mm, 1 mm, 1.5 mm. From the data obtained in this research process using several variations of cutting conditions that produce a good average roughness value is Kr 80, a = 0.5 mm, MRR = 0, 89 cm3 / min, with a roughness value of 1.89 µm . Based on the data obtained it can be concluded that the greater the depth of cutting, the higher the rate of wasted material (MRR) and the higher the level of surface roughness and vice versa. Kondisi pemotongan yang dilakukan pada proses pembubutan atau manufaktur akan berdampak terhadap kualitas komponen yang diproduksi. Salah satu indikator dari kualitas hasil pembubutan atau manufaktur adalah kekasaran permukaan pada benda tersebut.  Adapun penelitian ini bertujuan untuk menentukan perbandingan tingakat kekasaran permukaan baja ST 42 pasca pembubutan konvensional dengan kondisi pemotongan yang berbeda dengan memvariasikan sudut potong utama dan kedalaman pemotongan serta pengaruhnya terhadap laju bahan bahan terbuang (MRR).  Sudut potong utama yang digunakan pada penelitian ini adalah Kr 90, 80, 70 serta variasi kedalaman pemotongan 0,5 mm, 1 mm, 1,5 mm. Dari data yang diperoleh pada proses penelitian ini dengan menggunakan beberapa variasi kondisi pemotongan yang menghasilkan nilai rata-rata kekasaran yang baik adalah Kr 80, a = 0,5 mm, MRR = 0, 89 cm3/mnt, dengan nilai kekasarannya 1,89 µm. Berdasarkan data yang didapat maka dapat disimpulkan bahwa semakin besar kedalaman pemotongan maka semakin tinggi laju bahan terbuang (MRR) dan semakin tinggi tingkat kekasaran permukaan maupun sebaliknya.

Relation between Surface Roughness and Overlap Interval in Fused Deposition Modeling

2011 ◽  
Vol 264-265 ◽  
pp. 1625-1630 ◽  
Author(s):  
Dae Keon Ahn ◽  
Jin Hwe Kweon ◽  
Jin Ho Choi ◽  
Seok Hee Lee
Keyword(s):  
Surface Roughness ◽  
Manufacturing Process ◽  
Fused Deposition Modeling ◽  
Layered Manufacturing ◽  
Fused Deposition ◽  
Complex Shapes ◽  
Deposition Modeling ◽  
High Level ◽  
Surface Angle

Rapid prototyping (RP) can efficiently fabricate high level models with complex shapes. Hence the RP has been widely applied in various industrial fields. However, as the technology is inherently performed by layered manufacturing process, the surface quality of the RP part is not satisfactory to use general industrial purpose. This is the reason that surface roughness problem has been key issue in RP. In this paper, relation between surface roughness and overlap interval is investigated based on a surface roughness formulation in fused deposition modeling (FDM). Additionally, effects of surface angle and filament shape are analyzed and discussed to predict surface roughness distribution by the overlap interval variation.

Influence of Machining Parameters on 3D Surface Roughness of Powder Bushings

2016 ◽  
Vol 721 ◽  
pp. 378-382 ◽  
Author(s):  
Viktor Mironov ◽  
Pavels Stankevics ◽  
Artis Kromanis ◽  
Janis Lungevics
Keyword(s):  
Surface Roughness ◽  
Powder Processing ◽  
Cutting Speed ◽  
Machining Parameters ◽  
High Porosity ◽  
Machined Surface ◽  
3D Surface Roughness ◽  
Mo Content ◽  
Machined Surfaces

The paper presents the results on research of machining anti-friction bushings of lever brake systems of rail transport, wherein the bushings are made of powder material based on iron and copper. Powder composition contains Fe-C-Cu with Ni and Mo content of less than 0.3%, and with reduced phosphorus content. The porosity of the bushings were in the range of 15 – 20 %. The main objective of the work was to determine the optimal machining parameters, as well as to evaluate the quality of the machined surface. The bushing were machined with cutting speed in the range of 130 – 150 m/min. To assess the quality of the machined surfaces the 3D roughness parameters were used, which allow to asses the surface roughness in more accurate details. The microstructure of the samples indicated the presence of pores onto the machined surfaces. It was found that to improve the quality of the surface it is necessary to adjust the parameters of the powder processing of parts with high porosity in the direction of their reduction. Studies of the microstructure and morphology of chips showed that the shape and structure of the chip is highly dependent on the porosity of the material and its processing conditions.

scholarly journals Economic and Mathematical Modeling of the Quality of Services Provided by the Urban Passenger Transport Infrastructure Us-ing Nonfinancial Indicators

2018 ◽  
Vol 7 (4.38) ◽  
pp. 452
Author(s):  
Vladimir Sekerin ◽  
Mikhail Dudin ◽  
Dmitri Shevchenko ◽  
Konstantin Zadornov ◽  
Diana Maleeva
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Model ◽  
Transport Infrastructure ◽  
Quality Of Services ◽  
Financial Indicators ◽  
Queuing Systems ◽  
Passenger Transport ◽  
Passenger Transportation ◽  
Main Factors

The article reviews the issues of justifying the expediency of using financial indicators to assess the quality of passenger transportation and identification of the main factors that influence the quality of transportation. An economic and mathematical model of the passenger transportation quality using nonfinancial indicators was developed in the study.It was proposed to use a mathematical toolkit of the theory of queuing systems (QS) to study the operation of the route of the urban passenger transport system (UPTS).  

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