Study on the Database about Floating Polishing Technological Parameters

2008 ◽  
Vol 53-54 ◽  
pp. 197-200
Author(s):  
Xiao Cun Xu ◽  
Wen Bing Zheng ◽  
Bin Jiang ◽  
Shu Cai Yang
Keyword(s):  
Surface Roughness ◽  
Feeding Rate ◽  
Rotation Speed ◽  
Affecting Factors ◽  
Technological Parameters ◽  
Abrasive Particles ◽  
Die Surface ◽  
Key Factor ◽  
Working Procedure

Polishing is usually the last working procedure of making die surface. The roughness of die surface affects using performance of die directly; therefore, surface roughness is a key factor to scale quality of die surface. The paper focuses on affecting factors of polishing surface roughness, including the rotation speed of polishing head, floating force on polishing head, pass of polishing head movement, feeding rate of polishing head, and size of abrasive particles. Then, establish the parameters database in order to select appropriate technological parameters expediently. These results are used as operating guides for applications of die polisher.

Study on Surface Feature of Large Die and Polishing Quality during Floating Polishing

2013 ◽  
Vol 446-447 ◽  
pp. 245-248
Author(s):  
Shu Wen Zhang ◽  
Xiao Cun Xu
Keyword(s):  
Feeding Rate ◽  
Rotation Speed ◽  
Free Form ◽  
Affecting Factors ◽  
Abrasive Particles ◽  
Surface Polishing ◽  
Die Surface ◽  
Inclined Angle ◽  
Free Form Surfaces ◽  
Acting Force

During the transferring process of the large die surfaces, there are extensive needs of die surface polishing. Since almost large die surfaces are free-form surfaces, currently, these are almost manually implemented. In order to overcome this barrier, in this paper, firstly, large die surfaces were geometrically characterized, and their polishing processes for the die surfaces features were then analyzed; secondly, the polishing pattern and structure of the floating polishing head were studied, finally, the affecting factors of polishing quality about the floating polishing were studied experimentally versus roughness of polished surfaces with the developed floating polishing experimental prototype in this paper. The affecting factors of polishing quality include the rotation speed of polishing discs, normal acting force on polishing disc, loci of polishing disc movement, feeding rate of polishing disc, grit of abrasive particles, and inclined angle of the acting force on disc, are synchronized and analyzed. These research results are used as operating guides for applications of the floating die polisher.

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.

scholarly journals Annular Surface Micromachining of Titanium Tubes Using a Magnetorheological Polishing Technique

Micromachines ◽  
2020 ◽  
Vol 11 (3) ◽  
pp. 314 ◽  
Author(s):  
Wanli Song ◽  
Zhen Peng ◽  
Peifan Li ◽  
Pei Shi ◽  
Seung-Bok Choi
Keyword(s):  
Magnetic Field ◽  
Surface Roughness ◽  
Field Strength ◽  
Magnetic Field Strength ◽  
Rotation Speed ◽  
Abrasive Particle ◽  
Internal Surface ◽  
Abrasive Particles ◽  
High Magnetic Field Strength ◽  
Titanium Alloy Tube

In this study, a novel magnetorheological (MR) polishing device under a compound magnetic field is designed to achieve microlevel polishing of the titanium tubes. The polishing process is realized by combining the rotation motion of the tube and the reciprocating linear motion of the polishing head. Two types of excitation equipment for generating an appropriate compound magnetic field are outlined. A series of experiments are conducted to systematically investigate the effect of compound magnetic field strength, rotation speed, and type and concentration of abrasive particles on the polishing performance delivered by the designed device. The experiments were carried out through controlling variables. Before and after the experiment, the surface roughness in the polished area of the workpiece is measured, and the influence of the independent variable on the polishing effect is judged by a changing rule of surface roughness so as to obtain a better parameter about compound magnetic field strength, concentration of abrasive particles, etc. It is shown from experimental results that diamond abrasive particles are appropriate for fine finishing the internal surface of the titanium-alloy tube. It is also identified that the polishing performance is excellent at high magnetic field strength, fast rotation speed, and high abrasive-particle concentration.

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 INFLUENCE OF THE BIOMASS CARRIER TYPE ON THE OXYGEN TRANSFER RATE OF THE MODIFIED SUBMERSIBLE ROTATING BIOFILTER

2021 ◽  
Vol 10 (4) ◽  
pp. 60-68
Author(s):  
Maram Ali SAIED ◽  
Nikolay S. SERPOKRYLOV ◽  
Vladimir V. NELIDIN
Keyword(s):  
Oxygen Transfer ◽  
Transfer Rate ◽  
Rotation Speed ◽  
Mass Transfer Rate ◽  
Oxygen Transfer Rate ◽  
Immersion Depth ◽  
Treated Wastewater ◽  
Technological Parameters ◽  
Effi Ciency

The modifi ed submersible rotating biofi lter MSRB was developed and patented to improve the effi ciency and quality of treated wastewater from small sett lements in Syria by increasing the mass transfer rate and oxygen transfer rate of the drum-type rotating biofi lter without the need for additional aeration elements. The result of comparing the eff ect of two types of biomass carrier on the oxygen transfer rate OTR shows that the highest value of the OTR when using the fi rst biomass carrier (1) was 409 g/m3·h with a drum fi lling percentage of 60%, a rotation speed of 15 rpm and an immersion depth of 35% While the maximum value when using the second biomass carrier (2) was 518.95 g/m3·h with a drum fi lling percentage of 90%, a rotation speed of 15 rpm and an immersion depth of 15%. It can also be concluded that a change in the shape of the biomass carrier, as well as its density, signifi cantly aff ects the OTR of the biofi lter. In addition, changing the shape of the biomass carrier requires changing other technological parameters, such as the fi lling percentage of the drum, the depth of immersion and the rotation speed.

Study on Transient Air Permeability of Concrete under Different Curing Conditions

2014 ◽  
Vol 629-630 ◽  
pp. 223-228
Author(s):  
Song Mu ◽  
Ye Wu ◽  
Qian Jiang ◽  
Liang Shi
Keyword(s):  
Air Permeability ◽  
Concrete Cover ◽  
Concrete Durability ◽  
Affecting Factors ◽  
Curing Conditions ◽  
Slag Powder ◽  
Close Relationship ◽  
Key Factor ◽  
Curing Condition

Quality of concrete cover is a key factor for concrete durability. In fact, the quality of concrete cover has close relationship with mixture design and curing condition. Present study adopted transient test of air permeability to study on affecting factors of air permeability of concrete. Results dedicated that curing condition was the most important factor to affect transient air permeability of concrete. Adequate curing is required to decrease effectively the air permeability, and low ratio of W/B is helpful to reduce air permeability. Air permeability of concrete samples, added with fly ash or slag powder, was more sensitive to dry curing than standard curing. Besides, CaO based expansive agent effectively decreased coefficient of air permeability at the adequate curing condition

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.

Experimental Study of Surface Roughness of Wood Plastic Composites after Turning

2013 ◽  
Vol 856 ◽  
pp. 108-112 ◽  
Author(s):  
Zuzana Hutyrová ◽  
Marta Harničarová ◽  
Jozef Zajac ◽  
Jan Valíček ◽  
Jozef Mihok
Keyword(s):  
Surface Roughness ◽  
Material Removal ◽  
Rotation Speed ◽  
Surface Characteristics ◽  
Depth Of Cut ◽  
Turning Process ◽  
Coating Performance ◽  
Plastic Composites ◽  
Rotating Workpiece

In this study, surface characteristics of the samples of experimentally manufactured woodplastic composites (WPC) were determined. Turning process was used to produce surfaces by removing material from a rotating workpiece. For turning, the rotation speed, feed, and depth of cut determine the rate of material removal and resulting surface quality. The surface roughness is one of the most important factor affecting coating performance of the WPCs. Parameters of surface roughness (final micro-geometric characteristics Ra, Rz) of the samples was determined using a stylus-type profilometer Surftest SJ 401. This information will provide baseline data on the quality of WPC samples after turning.

Optimize Parameters of Floating Polishing with Tri-Polishing-Disk

2007 ◽  
Vol 359-360 ◽  
pp. 305-308
Author(s):  
Xiao Cun Xu ◽  
Zhe Jun Yuan ◽  
Bing Lin
Keyword(s):  
Process Parameters ◽  
Free Form ◽  
Affecting Factors ◽  
Polishing Process ◽  
Abrasive Particles ◽  
Surface Polishing ◽  
Die Surface ◽  
Inclined Angle ◽  
Free Form Surfaces ◽  
Acting Force

During the transferring process of the large die surfaces, there are extensive needs of die surface polishing. Since almost large die surfaces are free-form surfaces, currently, these are almost manually implemented. In order to overcome this barrier, base on design a floating polisher, this paper focuses on polishing rule of floating three polishing disks and the optimization of the associated polishing process parameters. In order to enhance the polisher performance, affecting factors of polishing process, including the rotation speed of polishing discs, normal acting force on polishing disc, loci of polishing disc movement, feeding rate of polishing disc, grit of abrasive particles, and inclined angle of the acting force on disc, are synchronized and analyzed versus roughness of polished surfaces. Then, using the parameter design plans and conducts tests regarding these affecting factors. Finally, the floating polishing process parameters are optimized based on the test results. These optimized results are used as operating guides for applications of the floating die polisher.

scholarly journals INVESTIGATION OF SUBSTRATE MIXING PROCESS IN ROTATING DRUM REACTOR

2021 ◽  
pp. 51-60
Author(s):  
Gennadii Golub ◽  
Nataliya Tsyvenkova ◽  
Anna Holubenko ◽  
Vyacheslav Chuba ◽  
Marina Tereshchuk
Keyword(s):  
Rotation Speed ◽  
Design Parameters ◽  
Rotating Drum ◽  
Chemical Parameters ◽  
Technological Parameters ◽  
Type Reactor ◽  
Multifactor Experiment ◽  
Operational Modes ◽  
Surface Angle

The results of the research on the influence of the drum type reactor design-technological parameters and the substrate`s physical-chemical parameters on the substrate`s components mixing evenness, that influence the quality of the received compost, are presented in this paper. By the method of the multifactor experiment rational values of the drum rotation speed, the blades (mounted on the inner drum surface) angle and the substrate`s moisture content are defined at which the components distribution homogeneity in the substrate reaches maximal value. The abovementioned, in turn, provides high compost quality by the agrichemical indices. The recommendations are given to pick the design parameters and operational modes of the drum type reactor.

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