Experimental Research on Technological Parameters of Magneto-Rheological Finishing for Metal Materials

2011 ◽  
Vol 411 ◽  
pp. 327-330
Author(s):  
Jia Hong Gao ◽  
Yan Yang ◽  
Zu Wen Ren
Keyword(s):  
Surface Roughness ◽  
Processing Time ◽  
New Technology ◽  
Technological Parameters ◽  
Workpiece Surface ◽  
Mr Fluids ◽  
Metal Materials ◽  
Magneto Rheological ◽  
Magnetic Filed

MRF (Magneto-rheological Finishing) is a kind of new technology which carries on fine polishing to the workpiece surface by using rheological property of MR fluids. A set of simple experimental equipment has been designed in this paper and magnet was selected for device forming magnetic filed. The main parameters of MRF which influence the surface quality of the metal material has been analyzed. The rule of the influence on surface roughness varying with several parameters has been summed up. The experiment results show that with the increase of magnetic field intensity, the value of surface roughness of workpiece decreases; the value increases with the increase of rotational velocity.The value of surface roughness of workpiece is in inverse proportion to the processing time. With the increase of time, the value of surface roughness of workpiece has been decreasing to basically stable after a certain amount of processing time.

Investigation of the Effects of Technological Parameters on Surface Roughness in Extrusion Bars of Aluminum Alloy

2019 ◽  
Vol 889 ◽  
pp. 155-160
Author(s):  
Trong Mai Nguyen ◽  
Đuc Quy Tran ◽  
Van Nghe Pham ◽  
Van Canh Nguyen
Keyword(s):  
Surface Roughness ◽  
Aluminum Alloy ◽  
Surface Quality ◽  
Research Work ◽  
Extrusion Process ◽  
Optimal Parameters ◽  
Technological Parameters

In this research work, the result of the effects of technological parameters on surface roughness in extrusion bars of aluminum alloy were pesented. The results of this study may be used for choosing optimal parameters of extrusion process so that surface quality of extruded bar was improved.

Nano-Precision Finishing Technology Based on Magnetorheological Finishing

2009 ◽  
Vol 416 ◽  
pp. 118-122 ◽  
Author(s):  
Yao Ming Li ◽  
Xing Quan Shen ◽  
Ai Ling Wang
Keyword(s):  
Surface Roughness ◽  
Advanced Technology ◽  
Technological Parameters ◽  
Magnetorheological Finishing ◽  
Shape Precision ◽  
Surface Destruction ◽  
Series Of Experiments ◽  
Precision Finishing ◽  
Better Than

Surface roughness is normally regarded as an important criterion for assessing the quality of optic elements; surface roughness of a high-quality optic element is required to be less than RMS1nm. In this paper, a series of experiments has been conducted on the sample magnetorheological finishing machine by using self-prepared magnetorheological liquid as finishing liquid, to assess the removing efficiency of magnetorheological finishing. Optimization of technological parameters enables the authors to obtain a glass-ware with an ideal surface roughness of RMS0.56nm. Magnetorheological finishing (MRF) is an advanced technology for processing optic elements that has been developed in recent years. The technology polishes optic elements by using viscoplastic soft media produced by the MRF liquid under the variation of gradient magnetic field. Better than traditional polishing method in shape precision, surface roughness and inner surface destruction, MRF is an ideal technology for obtaining super-precision optic surface.

scholarly journals Casting Blanks Cleanliness Evaluation Based on Ultrasonic Microscopy and Morphological Filtering

Metals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 796
Author(s):  
Heng Ding ◽  
Qingting Qian ◽  
Xue Li ◽  
Zhu Wang ◽  
Min Li
Keyword(s):  
Signal To Noise Ratio ◽  
New Technology ◽  
Continuous Caster ◽  
Internal Quality ◽  
Ultrasound Images ◽  
Morphological Filtering ◽  
Ultrasound Technology ◽  
Metal Materials ◽  
Better Than

The cleanliness of the casting blanks could seriously affect the quality of downstream products. Recently, ultrasound technology has been introduced to detect the inclusions in metal materials. However, due to the anisotropy of the material crystal, the ultrasonic wave has the characteristics of multiple scattering and refraction in its propagation process. This makes it difficult to evaluate the casting blanks cleanliness effectively, for the inclusion echoes are submerged in the background noise. Therefore, the ultrasonic microscope is innovatively proposed to carry out efficient scanning on the casting blanks. In the meantime, the morphological filtering algorithm has the advantages of fewer parameters and faster calculation speed which can be used to increase the signal-to-noise ratio of ultrasound images and extract the defect features more efficiently. In order to verify the effectiveness of the proposed method, specimens were taken from three strands of continuous caster for detection and analysis. The experimental results show that the second strand has the best quality and the cleanliness is 2.2/mm3, which is obviously better than the other two strands. This method will provide a new technology for the quantitative evaluation of the internal quality of the casting blanks.

The Influence of Cutting Conditions on Surface Roughness during Steel 100Cr6 Grinding

2017 ◽  
Vol 261 ◽  
pp. 215-220
Author(s):  
Martin Novák ◽  
Natasa Naprstkova
Keyword(s):  
Surface Roughness ◽  
Bearing Steel ◽  
Cutting Conditions ◽  
Machining Process ◽  
Machined Surface ◽  
Workpiece Surface ◽  
Bearing Steels ◽  
Technology Products ◽  
Machined Surface Roughness

Machining of tool steels is often an important used technology. Products made from these materials are often used in mechanical engineering, and quality of workpiece surface roughness after machining respective grinding is one of the important parameters that to us speak about the quality of the machining process. The paper deals with the influence of cutting conditions when grinding bearing steel 100Cr (EN ISO) on machined surface roughness. This steel belongs to a group of bearing steels.

The Influence of Cutting Conditions on Surface Roughness during Steel X38CrMoV5 Grinding

2013 ◽  
Vol 581 ◽  
pp. 247-254 ◽  
Author(s):  
Martin Novák ◽  
Natasa Naprstkova
Keyword(s):  
Surface Roughness ◽  
Cutting Conditions ◽  
Machining Process ◽  
Tool Steels ◽  
Machined Surface ◽  
Workpiece Surface ◽  
Technology Products ◽  
Machined Surface Roughness ◽  
Grinding Tool

Machining of tool steels is often an important used technology. Products made from these materials are often used in mechanical engineering, and quality of workpiece surface roughness after machining respective grinding is one of the important parameters that to us speak about the quality of the machining process. The paper deals with the influence of cutting conditions when grinding tool steel X38CrMoV5 (EN ISO) on machined surface roughness.

Experiment Research on Surface Roughness in Micro-Grinding Metal Material

2014 ◽  
Vol 1017 ◽  
pp. 500-505 ◽  
Author(s):  
Ya Dong Gong ◽  
Xue Long Wen ◽  
Zhong Xiao Zhu ◽  
Jun Cheng ◽  
Guo Qiang Yin ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Processing Method ◽  
Work Piece ◽  
Experiment Research ◽  
Micro Manufacturing ◽  
Roughness Model ◽  
Important Processing ◽  
Metal Materials ◽  
Intense Research

Micro-grinding is an important processing method in micro-manufacturing field. A series of micro-grinding experiments were done with several kinds of commonly used metal materials in the paper, and the influence of different grinding factors on the surface quality of the work-piece was discussed. The surface roughness and surface microstructure of each material were analyzed in micro-grinding. The general developmental law of the surface roughness in micro-grinding was got with different grinding parameters. The surface roughness model proposed by is accurately confirmed according to the experimental results. It provides significant results for the quality of micro-grinding and intense research for the development of micro-grinding.

Improvement of Surface Quality of Casting Produced by Casting under Pressure

2017 ◽  
Vol 265 ◽  
pp. 988-993 ◽  
Author(s):  
R.V. Gavariev ◽  
I.A. Savin
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Technological Process ◽  
Vapour Deposition ◽  
Entire Period ◽  
Deposition Method ◽  
Technological Parameters ◽  
Pilot Studies ◽  
Compression Mold

The article considers the surface roughness of compression molds castings received by casting under pressure depending on the condition of the form-building surface. The technological process of casting under pressure is presented for the "Strike plate" product, concrete technological parameters values are specified. The pilot studies of the roughness of the castings throughout the entire period of operation of a compression mold are conducted. Based on the received values the recommendations about improvement of quality of a surface of castings by drawing sheetings are submitted by phisical vapour deposition method.

Effectiveness of Hard Turning

2013 ◽  
Vol 801 ◽  
pp. 109-116
Author(s):  
Michal Adamik ◽  
Róbert Drlička ◽  
Milan Matúš ◽  
Ján Žitňanský
Keyword(s):  
Surface Roughness ◽  
Boron Nitride ◽  
Hard Turning ◽  
New Technology ◽  
Cubic Boron Nitride ◽  
Polycrystalline Diamond ◽  
Cutting Edge ◽  
Hard Part ◽  
Machined Parts

Hard turning is a turning operation performed on hard materials (hardness more than 45 HRC) in order to reach surface roughness close to that obtained in grinding. The development of this technology was accompanied by the development of new cutting materials such as cutting ceramics, cubic boron nitride and polycrystalline diamond. Especially cubic boron nitride has found its use in hard part turning operations because of its characteristics. However, new cutting materials result in new questions, which researchers are trying to solve. The major consideration for a user of this relatively new technology is the quality of parts produced and how the new cutting material will behave during machining. This paper aims to document and describe the process of wear on the cutting edge of a tool made from cubic boron nitride of a different grade and with a different geometry of the cutting edge, and its influence on surface roughness and quality. Wear was documented by a digital microscope with measurement option. Surface roughness was measured by a roughness meter. A notable observation from this research is that the flank wear of the cutting tool has a large impact on the quality of machined parts (especially surface finish and surface integrity) [1].

The Research of Diamond Coatings Morphology Evolution under the Action of Reactive Ion Etching in Perpendicular Direction

2016 ◽  
Vol 712 ◽  
pp. 87-92 ◽  
Author(s):  
Vitaly V. Okhotnikov ◽  
Stepan A. Linnik ◽  
Aleksandr V. Gaydaychuk
Keyword(s):  
Surface Roughness ◽  
Processing Time ◽  
Reactive Ion Etching ◽  
Cvd Diamond ◽  
Perpendicular Direction ◽  
Morphology Evolution ◽  
Average Surface Roughness ◽  
Diamond Coatings ◽  
Ion Etching

The evolution of the CVD diamond coatings morphology after perpendicular direction reactive ion etching was investigated. During the surface treatment, the average surface roughness was reduced. The efficiency of the etching decreases with the increasing of the processing time, until the surface roughness has been reduced by 30±5%. The height points spread over the surface were measured. The quality of the obtained films was investigated using the Raman spectroscopy.

scholarly journals Surface Integrity of Micro EDM Surface Using Electrodes of Various Diameters

Coatings ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 805
Author(s):  
Qingyu Liu ◽  
Fazhan Yang ◽  
Shufeng Sun ◽  
Man Yang ◽  
Jing Shao
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Surface Integrity ◽  
Pure Water ◽  
Tool Electrode ◽  
Micro Edm ◽  
Electrode Diameter ◽  
Workpiece Surface ◽  
Tool Diameter

The surface integrity of a micro electrical discharge machining (micro EDM) surface represents the surface quality of workpiece. The surface quality of micro EDM can be further improved by clarifying the machining mechanism and optimizing processing technology. In this paper, experiments were carried out to investigate the influence of the tool electrode diameter on the machined surface integrity of micro EDM. The evolutions of the tool diameter on the micro topography, element migration, and surface roughness of workpiece surface machined in pure water and EDM oil were illustrated. The results show that the surface roughness Ra decreases as the tool electrode diameter increased, regardless of the open circuit voltage and dielectric type, owing to the skin effect. The good fluidity and cooling property of pure water and the effect of electrochemical corrosion cause the surface roughness Ra of surface machined in pure water is much larger than that machined in EDM oil. Tool material migrates to the workpiece surface during the micro EDM process, whether pure water or EDM oil is adopted as the working medium. The influence of electrode size on the Cu content of the workpiece surface shows no significant trend. Pure water is more suitable for high efficiency, low-precision micro EDM, while EDM oil is better for high-precision micro EDM.

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