Study on the Fluid Magnetic Abrasive Polishing Technology

2010 ◽  
Vol 102-104 ◽  
pp. 495-501
Author(s):  
Cong Da Lu ◽  
Xiao Jun Gong ◽  
Hong Jia ◽  
Guo Zhong Chai
Keyword(s):  
Surface Quality ◽  
Material Removal ◽  
Internal Cavity ◽  
Machining Mechanism ◽  
Finishing Process ◽  
Magnetic Abrasive Polishing ◽  
Precision Finishing

Fluid magnetic abrasive (FMA) is a new precision finishing process. It has the capability of processing free shape surfaces and complex cavities. Due to its strong adjustability and controllability, FMA could be regarded as the final process of machining which could greatly improve the surface quality of workpiece. The paper first introduces the component and machining mechanism of FMA, secondly it describes the model of the material removal in the process, thirdly it presents the devices of FMA polishing. At the end, a grinding head tool based machining mode is proposed for realizing the polishing of internal cavity.

scholarly journals Effect of finishing process on the surface quality of Co-Cr-Mo dental alloys

2016 ◽  
Vol 12 ◽  
pp. 19-21
Author(s):  
Dorota Klimecka-Tatar ◽  
Klaudia Radomska ◽  
Grażyna Pawłowska
Keyword(s):  
Surface Quality ◽  
Dental Alloys ◽  
Finishing Process

scholarly journals Focused Ion Beam Milling of Single-Crystal Sapphire with A-, C-, and M-Orientations

Materials ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 2871
Author(s):  
Qiuling Wen ◽  
Xinyu Wei ◽  
Feng Jiang ◽  
Jing Lu ◽  
Xipeng Xu
Keyword(s):  
Single Crystal ◽  
Surface Quality ◽  
Material Removal ◽  
Focused Ion Beam ◽  
Removal Rate ◽  
Ion Beam ◽  
Crystal Orientations ◽  
Aluminum Ions ◽  
Single Crystal Sapphire

Sapphire substrates with different crystal orientations are widely used in optoelectronic applications. In this work, focused ion beam (FIB) milling of single-crystal sapphire with A-, C-, and M-orientations was performed. The material removal rate (MRR) and surface roughness (Sa) of sapphire with the three crystal orientations after FIB etching were derived. The experimental results show that: The MRR of A-plane sapphire is slightly higher than that of C-plane and M-plane sapphires; the Sa of A-plane sapphire after FIB treatment is the smallest among the three different crystal orientations. These results imply that A-plane sapphire allows easier material removal during FIB milling compared with C-plane and M-plane sapphires. Moreover, the surface quality of A-plane sapphire after FIB milling is better than that of C-plane and M-plane sapphires. The theoretical calculation results show that the removal energy of aluminum ions and oxygen ions per square nanometer on the outermost surface of A-plane sapphire is the smallest. This also implies that material is more easily removed from the surface of A-plane sapphire than the surface of C-plane and M-plane sapphires by FIB milling. In addition, it is also found that higher MRR leads to lower Sa and better surface quality of sapphire for FIB etching.

On-machine truing of diamond wheel and high-efficiency grinding of monocrystal silicon for aspheric surface

2016 ◽  
Vol 231 (1) ◽  
pp. 186-192 ◽  
Author(s):  
Bing Chen ◽  
Bing Guo ◽  
Qingliang Zhao
Keyword(s):  
Surface Quality ◽  
Material Removal ◽  
High Efficiency ◽  
Diamond Wheel ◽  
Experimental Results ◽  
Aspheric Surface ◽  
Removal Rates ◽  
Aspheric Surfaces ◽  
Silicon Carbon

To realize the high-efficiency grinding of the aspheric surfaces on monocrystal silicon, a novel on-machine truing method for the resin-bonded arc-shaped diamond wheels was proposed utilizing rotary green silicon carbon rod, and then the high-efficiency grinding of the aspheric surface was performed. First, the principle of mutual-wear for truing arc-shaped diamond wheel was introduced, and the truing performance was studied. The experimental results showed that the top morphology of the trued arc-shaped wheel was precise and smooth, and the run error on the top of the trued arc-shaped wheel was reduced from 41 to 10 µm after truing. Furthermore, high-efficiency grinding experiments revealed that the surface quality of the aspheric surface increased with the increase in the average material removal rates.

Analysis of Machinability of Ti- and Ni-Based Alloys

2012 ◽  
Vol 188 ◽  
pp. 330-338 ◽  
Author(s):  
Agostino Maurotto ◽  
Anish Roy ◽  
Vladimir I. Babitsky ◽  
Vadim V. Silberschmidt
Keyword(s):  
Surface Quality ◽  
Cutting Forces ◽  
Material Removal ◽  
Process Zone ◽  
Machining Process ◽  
Work Piece ◽  
Machining Parameters ◽  
Removal Rates ◽  
Conventional Machining

Efficient machining of advanced Ti- and Ni-based alloys, which are typically difficult-to-machine, is a challenge that needs to be addressed by the industry. During a typical machining operation of such alloys, high cutting forces imposed by a tool on the work-piece material lead to severe deformations in the process zone, along with high stresses, strains and temperatures in the material, eventually affecting the quality of finished work-piece. Conventional machining (CT) of Ti- and Ni-based alloys is typically characterized by low depths of cuts and relatively low feed rates, thus adversely affecting the material removal rates (MRR) in the machining process. In the present work, a novel machining technique, known as Ultrasonically Assisted Turning (UAT) is shown to dramatically improve machining of these intractable alloys. The developed machining process is capable of high MRR with an improved surface quality of the turned work-piece. Average cutting forces are significantly lower in UAT when compared to those in traditional turning techniques at the same machining parameters, demonstrating the capability of vibration-assisted machining as a viable machining method for the future.

A Study of the Solid-State Reaction for Polishing Sapphires

2012 ◽  
Vol 497 ◽  
pp. 195-199 ◽  
Author(s):  
Qian Fa Deng ◽  
Zhi Xiong Zhou ◽  
Zhao Zhong Zhou ◽  
Ju Long Yuan ◽  
Ji Cui Wang
Keyword(s):  
Solid State ◽  
Surface Quality ◽  
Material Removal Rate ◽  
Surface Finish ◽  
Solid State Reaction ◽  
Material Removal ◽  
Removal Rate ◽  
Substrate Material ◽  
Quality Requirements

As sapphire is an important substrate material, stringent surface quality requirements (i.e., surface finish and flatness) are required. In order to acquire the higher material removal rate and the better surface quality of sapphire, the solid state-reaction were introduced in this paper; abrasive of SiO2 and SiO2 with mixing the MgF2 power were compared to polish sapphire. The result showed that abrasive of SiO2 with mixing the MgF2 can obtain higher material removal rate and better surface quality. The result of the pr

Parametric Optimization for Nano-Finishing of the External Cylindrical Surfaces Using Rotating Core Magnetorheological Finishing Process

2018 ◽  
Author(s):  
Manpreet Singh ◽  
Anant Kumar Singh
Keyword(s):  
Mild Steel ◽  
Surface Quality ◽  
Process Parameters ◽  
Rotational Speed ◽  
Percentage Change ◽  
Optimum Process ◽  
Finishing Process ◽  
Cylindrical Workpiece ◽  
Finishing Processes

A rotating core magnetorheological finishing process has been developed to finish the external cylindrical surfaces at nano-level as the conventional finishing processes like grinding cannot meet the extreme precise requirement. The quality of finished cylindrical components estimated through its geometrical accuracy, material assets, and mechanical features. The macaroni making machine driving shaft is made up of mild steel where high quality of surface finish is required. In plastic toy industries, the mild steel punches are used where a high level of surface finish is required to increase the appearance of the products and to improve its geometrical accuracy. The MR finishing process can improve the external surface quality of the cylindrical components very precisely. This result in the improvement of prolongs functional performance of the components. In the present work, the optimum process parameters are experimentally investigated for nano-finishing of the mild steel cylindrical external surfaces using the rotating core magnetorheological (MR) finishing process. The rotation of tool core, the rotation of the cylindrical workpiece, the current, and the working gap are the control process parameters which affect the finishing performance i.e. percentage change in surface roughness value. So, the effects of these process parameters on the process response such as percentage change in surface roughness value have been analyzed using signal-to-noise ratios and mean response data. The current and the rotational speed of the tool core have been found as a considerable role for increasing the percentage change in roughness value. Further, the optimum magnitude of the process parameters are predicted as the current 3A, the rotational speed of tool 500 rpm, the rotational speed of the cylindrical workpiece 80 rpm and the working gap of 0.6 mm. With the finishing of these optimum process parameters on the present developed process, the average roughness Ra value of the external surface of the mild steel cylindrical is reduced to 60 nm from the initial Ra value of 600 nm in 90 minutes of finishing. The results of scanning electron microscopy test, mirror images and roughness graphs of the finished surface have confirmed that the present finishing process can fulfil the extreme precise requirement of surface quality which is not possible by the conventional finishing processes. The extreme precise requirement of the surface quality of the external cylindrical workpieces are dealing with mild steel punches in plastic toy industries, dies, and molds, macaroni making driving shafts, armature shaft, and shafts used in gear etc.

Dry WEDM in Improving HS-WEDMed Surface Quality

2008 ◽  
Vol 392-394 ◽  
pp. 624-628 ◽  
Author(s):  
Tong Wang ◽  
Yu Mei Lu ◽  
Shuang Shuang Hao ◽  
Shu Qiang Xie ◽  
Xiao Cun Xu ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Material Removal ◽  
High Speed ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Dry Wedm ◽  
Finish Cut ◽  
The Relationship

This paper studies the surface quality of mould steel with high-speed wire electrical discharge machining (WEDM) method, which is conducted in gas to improve the accuracy of finish cut, and compares the surface quality in atmosphere and in emulsion dielectric. Experiment results showed that WEDM in atmosphere offers advantages such as better surface roughness and higher material removal rate. The relationship about winding speed and worktable feed on WEDMed surface quality in semi-finishing cut and finishing cut had been obtained. Morover, a new attemption was successful in applying dry WEDM in multiple cut to improve surface roughness.

Impact of slurry pH on material removal rate and surface quality of polished fused silica

Optifab 2017 ◽  
2017 ◽  
Author(s):  
Cedric Maunier ◽  
Melanie Redien ◽  
Bertrand Remy ◽  
Jérôme Néauport ◽  
Karine Poliakoff-Leriche
Keyword(s):  
Surface Quality ◽  
Material Removal Rate ◽  
Material Removal ◽  
Removal Rate ◽  
Fused Silica

Improvement in surface quality of diamond-turned aluminium substrate by using hydrogen peroxide: a molecular dynamics simulation study

2020 ◽  
pp. 251659842096399
Author(s):  
Prabhat Ranjan ◽  
Anuj Sharma ◽  
R. Balasubramaniam
Keyword(s):  
Molecular Dynamics ◽  
Quality Improvement ◽  
Molecular Dynamics Simulation ◽  
Surface Quality ◽  
Surface Finish ◽  
Chemical Treatment ◽  
Material Removal ◽  
Treatment Process ◽  
Dynamics Simulation

In this work, the atomic mechanism of chemical treatment on diamond-turned aluminium surface due to aqueous H2O2 is investigated using a reactive molecular dynamics simulation (R-MDS). This study is carried out to understand the mechanism of surface quality improvement of a diamond-turned aluminium workpiece due to chemical treatment. Surface quality improvement is focused to analyse the effect of chemical treatment process for improving surface finish, reflectance and chemical stability of the workpiece. It is observed that the diamond-turned surface contains a higher cohesive energy as compared to atomically smooth surfaces. Chemical treatment does more material removal on nano-peaks with respect to the smooth surface, and this helps to reduce the cohesive energy as low as naturally possible. By applying this treatment, the optical quality of the workpiece gets enhanced drastically. R-MDS also reveals that the nano-peaks of diamond turn machining (DTM) surface can further improve surface finish by using the chemical treatment process, and the same is validated by experiments. Experimental data also support that due to the reduction of surface roughness, reflectance increases in a broad band of wavelength. The present work shows that material removal from the nano-peaks of workpiece occurs due to the oxygen radicals generated from H2O2, which raise the local temperature, followed by temperature-assisted chemical reaction. When most of the nano-peak atoms are removed, further material removal stops. Experimental results also support the mechanism of such process of chemical treatment. Hence, the diamond turned surface can be further improved beyond the capability of the diamond turning process to cater the need for optics and astronomical mirror at-least one step ahead in the domain of ultra-precision manufacturing.

Surface finishing requirements on various internal cylindrical components: A review

2021 ◽  
pp. 251659842110355
Author(s):  
Talwinder Singh Bedi ◽  
Ajay Singh Rana
Keyword(s):  
Surface Quality ◽  
Material Removal ◽  
High Surface ◽  
Internal Surface ◽  
Modern Technology ◽  
Surface Finishing ◽  
Sustainable Product ◽  
Finishing Processes ◽  
Polishing Fluid

Modern technology requires producing of a sustainable product with a high surface accuracy. In applications where the surface quality is highly considerable in various internal cylindrical components requires technology to manufacture an ultrafine surface finish. There is, in general, a probability of inducing errors into products by the traditional finishing processes (such as grinding/honing), which lead to failure. Preferably with some evidence in the main text. Further, the advanced finishing processes are developed, where the finishing forces can be controlled by varying the power output. Instead of a solid abrasive tool, the smart polishing fluid is used, which gets activated under the magnetic fields. In this manuscript, the material removal under different internal surface finishing processes is elaborated, which helps in improving the surface quality of various industrial components. Also, the surface quality produced on various industrial components after traditional as well as advanced finishing processes are discussed.

Sign in / Sign up

Export Citation Format

Share Document