scholarly journals The Effect of Selected Parameters of Vibro-Abrasive Processing on the Surface Quality of Products Made of 6082 Aluminium Alloy

Materials ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4117 ◽  
Author(s):  
Marcin Stańczyk ◽  
Tomasz Figlus
Keyword(s):  
Surface Roughness ◽  
Aluminium Alloy ◽  
Research Effort ◽  
Mass Finishing ◽  
Measuring Surface ◽  
Finishing Process ◽  
Continuous Progress ◽  
Quality Of Products ◽  
Laser Devices

Vibro-abrasive processing is the basic method for the mass finishing of parts and components in various industries. Continuous progress in the development of processing media and machine design solutions means that every research effort into vibro-abrasive processing broadens the scope of knowledge in the selection of media, parameters, and applications in various industry fields. In this paper, an attempt is made to parametrize the vibratory grinding process, which is one of the three stages of high gloss finishing. Samples of the 6082 aluminium alloy intended for use in loaded machine parts and forged car wheel rims were subject to a research analysis. The samples were processed in a rotary vibrator equipped with a sample fixing system, using resin media and auxiliary com-pounds. On the basis of the analysis, the processing capacities were determined for the selected conditions and abrasive media. The influence of time and applied processing media on the change in samples’ roughness was determined. The effects of processing were examined with the use of laser devices measuring surface roughness in the areas of 3D and 2D analysis. The analysis of the test results showed that the use of S12TZ type resin media in a 12-hour finishing process of the 6082 aluminium alloy allowed for a 75.5% reduction in surface roughness, which corresponds to approximately 6.3% per hour of processing.

Development of polymer abrasive medium for nanofinishing of microholes on surgical stainless steel using abrasive flow finishing process

2019 ◽  
Vol 234 (3) ◽  
pp. 355-370 ◽  
Author(s):  
Sachin Singh ◽  
M Ravi Sankar
Keyword(s):  
Surface Roughness ◽  
Stainless Steel ◽  
High Surface ◽  
Machining Process ◽  
Abrasive Medium ◽  
Finishing Process ◽  
Drug Eluting ◽  
Finishing Processes ◽  
Abrasive Flow Finishing

The finishing operation completes the manufacturing cycle of a component. Depending on the level of finish (micro and nano) required on the component surface, different finishing processes are employed. Several components employed in medical, automotive and chemical industries use different types of passages for the flow of fluid. The surface roughness of such passages decides the functionality of the component. Drug-eluting stents are one of the recent advancements in the medical industry. They possess microholes for release of the drugs to the point of cure. Microholes are mostly fabricated by thermal-based micromachining processes that generate metallurgically destroyed surface layers with high surface roughness. Later, these are polished using chemical or electrochemical polishing techniques, which chemically destroy the quality of the surface. These metallurgically and chemically modified (destroyed/changed) rough surfaces on the microhole wall can cause contamination of the drug. So in this article, microholes of diameter 850 ± 30 µm are fabricated in surgical stainless steel (SS 316L) workpieces using the electric discharge micromachining process. Machined microholes are finished by employing a non-traditional finishing process called the abrasive flow finishing process. Instead of using a commercially available expensive abrasive flow finishing medium, the economic medium is fabricated in-house, and its rheological study is carried out. Machining process produces microholes with a surface roughness of about 1.40 ± 0.10 µm. Later, by finishing of microholes with the abrasive flow finishing process, the surface roughness is reduced to 150 nm (percentage surface roughness improvement of about 88.53%). Therefore, the abrasive flow finishing process is a viable alternative to chemical-based polishing processes as it removes the recast layer and achieves nanosurface roughness.

Computational model for predicting the effect of process parameters on surface characteristics of mass finished components

2016 ◽  
Vol 33 (3) ◽  
Author(s):  
Venkatesh Vijayaraghavan ◽  
Sylvie Castagne
Keyword(s):  
Surface Roughness ◽  
Genetic Programming ◽  
Computational Model ◽  
Process Parameters ◽  
Design Methodology ◽  
Surface Characteristics ◽  
Surface Finishing ◽  
Programming Approach ◽  
Mass Finishing ◽  
Finishing Process

Purpose Mass finishing is a commonly employed surface finishing process for improving surface characteristics of aerospace engineering components. Optimization of surface characteristics of such critical components require an explicit computational model that can describe the surface characteristics of the finished component. This paper aims to develop an explicit computational model that can describe the surface roughness as a function of various process parameters which influence the mass finishing process. Design/methodology/approach In the present work, the authors propose to study the roughness characteristics using a combined evolutionary computing approach based on Multi-Adaptive Regression Splines (MARS) and Genetic Programming (GP) techniques. Findings The authors conducted sensitivity and parametric analysis to capture the dynamics of surface characteristics by unveiling dominant input variables and hidden non-linear relationships. It is found that by regulating the process time and media size, a greatest variation in surface finish reduction can be achieved in mass finishing process. Originality/value To the best of authors knowledge, for the first time a hybrid evolutionary computational technique has been proposed in this work. The authors combined two powerful evolutionary techniques, namely Multi-variate Adaptive Regressive Splines and Genetic Programming approach. The proposed approach was able to capture the dynamics of surface roughness with higher accuracy as comparable to that of the experiments.

Influence of the Blank Initial State on the Quality of the Small Drawn Parts

2013 ◽  
Vol 371 ◽  
pp. 710-714
Author(s):  
Elena Costache ◽  
Gheorghe Brabie ◽  
Augustin Jitaru
Keyword(s):  
Surface Roughness ◽  
Aluminium Alloy ◽  
Uniform Distribution ◽  
Drawing Process ◽  
Blank Holder Force ◽  
Initial State ◽  
Blank Holder ◽  
Part Quality ◽  
Negative Phenomena

An optimum blank quality presents the following several benefits on the drawn part quality: it leads to an improved quality of the parts; it prevents some negative phenomena (like: fracture, a uniform distribution of material thickness in the drawn part and reduction of the blank holder force required during the drawing process). In the present work, an analysis was performed concerning the influence of the initial state of blank (microhardness, thickness, surface roughness and topography) on the quality of micro/milli cylindrical drawn parts made from aluminium alloy sheets having the following thicknesses: 0.10 and 0.20 mm.

scholarly journals Study on improving hole quality of 7075 aluminum alloy based on magnetic abrasive finishing

2020 ◽  
Vol 12 (6) ◽  
pp. 168781402093200
Author(s):  
Anyuan Jiao ◽  
Guofu Zhang ◽  
Binghong Liu ◽  
Weijun Liu
Keyword(s):  
Surface Roughness ◽  
Aluminum Alloy ◽  
Surface Finishing ◽  
7075 Aluminum Alloy ◽  
Magnetic Abrasive Finishing ◽  
Finishing Process ◽  
Abrasive Finishing ◽  
Inner Surface ◽  
Spinning Speed

Based on the mechanism of magnetic abrasive finishing, the 7075 aluminum alloy (Al7075) was used in the experimental study. In order to improve wall surface quality and to remove the edge burrs of the hole, a novel magnetic abrasive finishing process was proposed. First, the radial magnetizing pole for the inner surface finishing process was confirmed. The evaluation of magnet spinning speed, abrasive mesh, and abrasive filling amount on the diameter deviation of the hole and surface roughness of the inner wall was studied. According to the characteristics of magnetic abrasive finishing process, Taguchi’s method was used to carry out the test. Through the analysis of variance, the best process parameters were determined and verified. The inner surface roughness was further decreased and the surface morphology was more uniform after finishing process. Second, the edge burr removal process of the hole exit was also studied, and the geometry of the burrs was measured before and after the magnetic abrasive finishing process. The results show that the burrs were significantly removed and the burr removal efficiency was improved by 33.3% compared with the conventional magnetic abrasive finishing process. Finally, the improved magnetic abrasive finishing process is an effective method in improving finishing quality of the Al7075 holes.

Study on the Finishing Process for the Aluminum Nitride Substrates

2009 ◽  
Vol 69-70 ◽  
pp. 282-286
Author(s):  
Zhao Zhong Zhou ◽  
Ju Long Yuan ◽  
Bing Hai Lv
Keyword(s):  
Surface Roughness ◽  
Aluminum Nitride ◽  
Material Removal ◽  
Smooth Surface ◽  
Removal Rate ◽  
Removal Mechanism ◽  
Material Removal Mechanism ◽  
Finishing Process ◽  
Ultra Precision

Aluminum nitride (AlN) ceramic has excellent electrical insulation and dielectric properties. The ultra-precision lapping and polishing techniques for the AlN substrate are studied in this paper, and the influence of the lapping parameters such as load and slurry on the surface roughness, material removal rate of AlN is discussed. The surface of workpiece after processing is observed with microscope to analyze the material removal mechanism. An extremely smooth surface with roughness 6nm Ra is obtained after the finishing process. It is also found that the gap between grains will decrease the precision and quality of AlN substrate.

CONTROL IN REAL TIME THE DENSITY OF PRODUCT AT VARIOUS STAGES OF THE TECHNOLOGICAL PROCESS OF SUGAR PRODUCTION

2020 ◽  
Author(s):  
S.B. Kudryashev ◽  
◽  
N.S. Assev ◽  
R.D. Belashov ◽  
V.A. Naumenko ◽  
...  
Keyword(s):  
Real Time ◽  
Technological Process ◽  
Sugar Industry ◽  
Sugar Production ◽  
Production Processes ◽  
Quality Of Products

The article is devoted to solving one of the most important problems of the development of the sugar industry in Russia – the modernization of sugar production processes. Today, sugar production is actively being modernized, shifting most of its processes to the path of avomatization and optimization to improve the quality of products. This article describes one of the main ways to obtain information about the concentration of sucrose in syrup in the production of sugar.

Агрономическая эффективность промышленной (голландской) технологии возделывания картофеля

2018 ◽  
Author(s):  
C. Coy ◽  
A.V. Shuravilin ◽  
O.A. Zakharova
Keyword(s):  
Heavy Metals ◽  
Regression Analysis ◽  
Positive Response ◽  
Growth Yield ◽  
Correlation And Regression Analysis ◽  
Yield And Quality ◽  
Quality Of Products ◽  
High Degree ◽  
The Impact

Приведены результаты исследований по изучению влияния промышленной технологии возделывания картофеля на развитие, урожайность и качество продукции. Выявлена положительная реакция растений на подкормку K2SO4 в период посадки. Корреляционно-регрессионный анализ урожайности и качества клубней выявил высокую степень достоверности результатов опыта. Содержание нитратов и тяжелых металлов в клубнях было ниже допустимых величин.The results of studies on the impact of industrial technology of potato cultivation on growth, yield and quality of products. There was a positive response of plants to fertilizer K2SO4 in the period of planting. Correlation and regression analysis of yield and quality of tubers revealed a high degree of reliability of the results of experience. The contents of nitrates and heavy metals in tubers was below the permissible values.

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