A spiral path generation method for achieving uniform material removal depth in aspheric surface polishing

2022 ◽  
Author(s):  
Xingtian Qu ◽  
Qinglong Liu ◽  
Hongyi Wang ◽  
Haizhong Liu ◽  
Huichao Sun
Keyword(s):  
Material Removal ◽  
Path Generation ◽  
Aspheric Surface ◽  
Spiral Path ◽  
Surface Polishing

Aspheric Surface NC Polishing Force-Position Decoupling Control Technology

2013 ◽  
Vol 771 ◽  
pp. 71-74
Author(s):  
Guo Fa Li ◽  
Cui Yun Shan ◽  
Pu Zhao
Keyword(s):  
Material Removal Rate ◽  
Material Removal ◽  
Removal Rate ◽  
Control Model ◽  
Decoupling Control ◽  
Control Technology ◽  
Aspheric Surface ◽  
Rotating Speed ◽  
Surface Polishing ◽  
Polishing Force

Based on MTTSD (Magneto-rheological Torque Transmission Servo Devices) and force-position decoupling control technology, an aspheric surface NC polishing project is put forward. The aspheric surface polishing fundamental theory is researched. Under the condition of a constant material removal rate, a new aspheric surface polishing model is brought forward. In addition, under the condition of a constant material removal rate, this paper brought up a polishing force control model and a workpiece rotating speed control model, according to witch, force and rotating speed change with the coordinates of working points, and variation curves are drawn.CLC Number: TH166 Document Identifier: A

Computer numeric control subaperture aspheric surface polishing—microroughness evaluation

2014 ◽  
Vol 53 (9) ◽  
pp. 092011 ◽  
Author(s):  
Frantisek Prochaska ◽  
Jaroslav Polak ◽  
Ondrej Matousek ◽  
David Tomka
Keyword(s):  
Aspheric Surface ◽  
Surface Polishing ◽  
Computer Numeric Control

Progress in material removal mechanisms of surface polishing with ultra precision

2004 ◽  
Vol 49 (16) ◽  
pp. 1687-1693 ◽  
Author(s):  
Jin Xu ◽  
Jianbin Luo ◽  
Xinchun Lu ◽  
Chaohui Zhang ◽  
Guoshun Pan
Keyword(s):  
Material Removal ◽  
Material Removal Mechanisms ◽  
Surface Polishing ◽  
Removal Mechanisms ◽  
Ultra Precision

Fundamental Investigation on the Polishing Aspheric Elements with Doughnut-Shaped MCF Slurry

2018 ◽  
Vol 792 ◽  
pp. 179-184 ◽  
Author(s):  
Ming Feng ◽  
Yong Bo Wu ◽  
Teruo Bitoh ◽  
Tsunehisa Suzuki ◽  
Mitsuyoshi Nomura ◽  
...  
Keyword(s):  
Experimental Result ◽  
Aspheric Surface ◽  
Aspheric Surfaces ◽  
Variable Parameters ◽  
Flat Surfaces ◽  
Surface Polishing ◽  
Fundamental Investigation ◽  
Novel Method ◽  
Curve Radius ◽  
Polishing Tool

Previous researches have confirmed that MCF (magnetic compound fluid) slurry shows outstanding performance in the nanoprecision polishing of flat surfaces and V-grooves. However, no investigations have been conducted on the polishing of aspheric surfaces using MCF slurry. In this work, a novel method employing a doughnut-shaped MCF polishing tool and a 6-DOF manipulator has been proposed for the aspheric surface polishing. The time consumption for forming stable polishing tool and its final appearance are investigated. Flat aluminum alloy workpieces that can be considered as a kind of aspheric elements with infinite curve radius were adopted in the investigation of the polished forces under variable parameters. As a typical experimental result, with MCF3 slurry, 2.5ml volume of supplied slurry and work gap 3.5 mm, the surface roughness Ra decreases from 125nm to almost 10nm after 90 min polishing, confirming that the proposed method has the potential to polish aspheric surfaces.

The Experimental Study on Mechanical Polishing on Materials with Hydrolysis Reaction

2017 ◽  
Vol 739 ◽  
pp. 182-186
Author(s):  
Hung Jung Tsai ◽  
Pay Yau Huang ◽  
Chung Ming Tan ◽  
Tang Feng Chang
Keyword(s):  
Experimental Study ◽  
Material Removal Rate ◽  
Material Removal ◽  
Removal Rate ◽  
Experimental Studies ◽  
Operating Conditions ◽  
Hydrolysis Reaction ◽  
Polishing Process ◽  
Surface Polishing ◽  
Material Removal Rate Model

The hydrolytic properties of LiAlO2 (LAO) are important factors for its applications on LED fabrication. During soft pad polishing process, the H2O in the slurry is deleterious for LAO surface polishing results. The current study develops a material removal rate model for materials with hydrolysis reaction to predict the result of polishing process.The current research conducts the experimental studies to investigate the material removal rate and its mechanism during the soft pad polishing process. In the experimental study, the hydrolytic properties of LAO have been tested to understand the hydrolysis speed with different operation parameters to assist the development of the theoretical model. Also the material removal rates of LAO with hydrolytic property have been measured under different soft pad polishing operating conditions. The experimental results provide the hydrolytic properties of LiAlO2 to understanding of the mechanism on polishing process.

Polishing path generation for physical uniform coverage of the aspheric surface based on the Archimedes spiral in bonnet polishing

2019 ◽  
Vol 233 (12) ◽  
pp. 2251-2263 ◽  
Author(s):  
Qizhi Zhao ◽  
Lei Zhang ◽  
Yanjun Han ◽  
Cheng Fan
Keyword(s):  
Tool Path ◽  
Curved Surface ◽  
Path Generation ◽  
Aspheric Surface ◽  
Polishing Process ◽  
Bonnet Polishing ◽  
Archimedes Spiral ◽  
Uniform Coverage ◽  
Polishing Path ◽  
Polishing Tool

As a new polishing method, bonnet polishing is suitable for polishing the curved surface due to its advantages in flexibility and adaptability of the polishing tool. In the polishing process, the contact state between the bonnet and the curved surface always changes. The traditional polishing tool path with equal interval will inevitably lead to over-polished areas and unpolished areas. In this article, a new tool path for bonnet polishing, which is called the revised Archimedes spiral polishing path, is proposed to ensure the physical uniform coverage of the curved surface in bonnet polishing. The path generation method is based on the modified tool–workpiece contact model and the pointwise searching algorithm. To prove the effectiveness of the revised path, two aspheric workpieces were polished along the traditional Archimedes spiral polishing path and the revised path, respectively. The roughnesses of the two workpieces are 10.94 and 10 nm, and the profile tolerances are 0.4097 and 0.2037 μm, respectively. The experimental results show that the revised path achieves lower roughness and surface tolerance than the traditional Archimedes path, which indicates that the revised path can achieve uniform physical coverage on the surface.

Study on Effect of Viscoelastic Properties on Surface Roughness Uniformity in Abrasive Flow Machining for Plate Surface

2016 ◽  
Vol 1136 ◽  
pp. 131-134 ◽  
Author(s):  
Xuan Ping Wang ◽  
You Zhi Fu ◽  
Hang Gao
Keyword(s):  
Viscoelastic Properties ◽  
Material Removal ◽  
Flow Direction ◽  
Dominant Role ◽  
Machining Process ◽  
Rheological Parameters ◽  
Process Conditions ◽  
Abrasive Flow Machining ◽  
Surface Polishing ◽  
Viscoelastic Constitutive Model

Abrasive flow machining is a suitable technique for surface polishing due to its rheological characteristics, however, it's difficult to achieve uniform roughness for polished surfaces as the material removal mechanism is still ambiguous. In this paper the viscoelastic properties of abrasive flow media are incorporated to explore the phenomena of inconsistent material removal in the AFM polishing process, where the material removal near the edges is obviously higher than that in the middle along the flow direction. The rheological parameters of the viscoelastic constitutive model adopted are varied to study the polishing effectiveness under different process conditions. The results of numerical analysis reveal that there exist distinct differences of viscoelastic stress fields between the edges and the middle regions, which leads to the material removal near the edges is higher than that in the middle. It could be concluded that the viscoelastic properties of abrasive media play the dominant role for the inconsistent material removal in abrasive flow machining process.

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.

scholarly journals 427 Basic research of aspheric surface polishing method by r-θ coordinates system robot

2001 ◽  
Vol 2001.3 (0) ◽  
pp. 271-272
Author(s):  
Shozo Suzuki ◽  
Toshio Kasai ◽  
Mohammad Jashim Uddin ◽  
Junichi Ikeno ◽  
Kenichiro Horio ◽  
...  
Keyword(s):  
Basic Research ◽  
Aspheric Surface ◽  
Surface Polishing
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