Research on Flexible Bonnet Polishing Process Method and Related Technology

2012 ◽  
Vol 490-495 ◽  
pp. 2916-2920
Author(s):  
Shu Jing Sha ◽  
Long Shan Wang ◽  
Yong Jie Shi
Keyword(s):  
Free Surface ◽  
Material Removal ◽  
Dwell Time ◽  
Polishing Process ◽  
Bonnet Polishing ◽  
The Core ◽  
Ultra Precision ◽  
Polishing Tool ◽  
Process Method

Bonnet tool polishing is one kind of methods that can obtain higher surface quality of the ultra precision processing for producing flat, aspheric and other mould free surface, etc. The latest development and research results on bonnet polishing technology at home and abroad were reviewed. The core technologies of bonnet polishing were analyzed, including polishing principles, polishing tool, the rate of material removal, edge control, dwell time, path planning etc. The results show that the bonnet polishing method is an economic, efficient, practical and high precision polishing technology.

Experimental Study on the Ultra-Precision Polishing for the Quartz Substrates

2013 ◽  
Vol 797 ◽  
pp. 135-139 ◽  
Author(s):  
Lei Sun ◽  
Wei Gang Guo ◽  
Ju Long Yuan ◽  
Qian Fa Deng ◽  
Ming Feng ◽  
...  
Keyword(s):  
Experimental Study ◽  
Material Removal ◽  
Smooth Surface ◽  
Quartz Substrate ◽  
Removal Mechanism ◽  
Material Removal Mechanism ◽  
Polishing Process ◽  
Ultra Precision ◽  
Quartz Substrates

The Quartz substrates are widely used in various fields, and the requirement for the surface quality of quartz substrate is higher than ever before. This paper focuses on the ultra-precision polishing technology for the quartz substrates, and the material removal mechanism in the process of ultra-precision polishing is discussed. The results showed that an extremely smooth surface of quartz substrate was obtained in the ultra-precision polishing process, and the best surface roughness reached Ra 0.82nm. Meanwhile, the thickness can be controlled very well.

Material Removal and Application by Chemical Impact Reaction in Nano-Abrasive Jet Polishing

2013 ◽  
Vol 631-632 ◽  
pp. 550-555
Author(s):  
Wen Qiang Peng ◽  
Sheng Yi Li ◽  
Chao Liang Guan ◽  
Xin Min Shen
Keyword(s):  
Material Removal ◽  
Abrasive Particle ◽  
Precision Machining ◽  
Optical Surface ◽  
Polishing Process ◽  
Abrasive Particles ◽  
Mechanical Process ◽  
Abrasive Jet Polishing ◽  
Ultra Precision ◽  
Machining Properties

Material removed by mechanical process inevitably causes surface or subsurface damage containing cracks, plastic scratch, residual stress or dislocations. In nano-abrasive jet polishing (NAJP) the material is removed by chemical impact reaction. The chemical impact reaction is validated by contrast experiment with traditional lap polishing process in which the material is mainly removed through mechanical process. Experiment results show the dependence of the abrasive particles on the choice of materials. Even if the abrasive particle and the workpiece are composed of similar components, the machining properties are remarkably different due to slight differences in their physical properties or crystallography etc. Plastic scratches on the sample which was polished by the traditional mechanical process are completely removed by NAJP process, and the surface root-square-mean roughness has decreased from 1.403nm to 0.611nm. The NAJP process will become a promising method for ultra precision machining method for ultrasmooth optical surface.

scholarly journals Steel mould surface improvement by robot fluid jet polishing and robot pad polishing for polymer optic production

2019 ◽  
Vol 215 ◽  
pp. 05003
Author(s):  
Rui Almeida ◽  
Timon Ebert ◽  
Rainer Börret ◽  
Mario Pohl
Keyword(s):  
Surface Roughness ◽  
Material Removal ◽  
Geometrical Shape ◽  
Polishing Process ◽  
Shape Deviation ◽  
Mould Surface ◽  
Shape Correction ◽  
Steel Mould ◽  
Surface Improvement

In order to improve the quality of injection-moulded polymer optic parts, it is necessary to improve the quality of the respective steel moulds. For this reason, it is not only necessary to improve the surface roughness of the mould, but also its geometrical shape. The material removal obtained from robot pad polishing is too low. This makes a shape correction after the milling step a very prolonged process. The aim of this work is to use a polishing chain to improve the surface quality of steel samples in terms of shape deviation and surface roughness. This correction polishing chain uses the robot fluid jet polishing for the geometrical shape correction and afterwards the robot pad polishing for the improvement of the surface roughness. Due to the high material removal rates of the fluid jet polishing, it is possible to correct the geometrical shape of steel moulds very fast up to a certain deviation. The pad polishing process improves the surface roughness of the steel samples. A correction of the shape deviation of more than 80% with a RMS of approximately 8 nm was obtained.

Comparison of Processing Features between Semi Bonded Abrasive Lapping and Loose Abrasive Lapping

2009 ◽  
Vol 416 ◽  
pp. 439-442
Author(s):  
Xun Lv ◽  
Ju Long Yuan ◽  
Dong Hui Wen
Keyword(s):  
Surface Roughness ◽  
Material Removal Rate ◽  
Material Removal ◽  
Removal Rate ◽  
Processing Parameters ◽  
Good Surface ◽  
Ultra Precision ◽  
New Processing ◽  
Short Time

Semi bonded abrasive lapping is an effective ultra-precision lapping method. It can obtain good surface quality of workpiece in short time. This paper focused on the differences of processing features by comparing semi bonded abrasive lapping and loose abrasive lapping in several groups processing parameters. The results showed that the surface roughness of workpiece in semi bonded abrasive lapping was far superior to that of loose abrasive lapping in same processing parameters. And the MRR (material removal rate) of semi bonded abrasive lapping was slightly lower than that of loose abrasive lapping. For these features of semi bonded abrasive, a new processing flow would also be proposed in this paper.

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.

Experimental Research on Polishing Spot of Bonnet Polishing

2007 ◽  
Vol 10-12 ◽  
pp. 385-389
Author(s):  
J.F. Song ◽  
Ying Xue Yao ◽  
D.G. Xie ◽  
Bo Gao
Keyword(s):  
Experimental Research ◽  
Material Removal Rate ◽  
Material Removal ◽  
Removal Rate ◽  
Technological Parameters ◽  
Bonnet Polishing ◽  
Surface Configuration ◽  
Polishing Tool ◽  
Optical Manufacturing ◽  
Manufacturing Machine

A new optical manufacturing technology called bonnet polishing has been developed over last decade. During bonnet polishing, the puffed bonnet is flexible and self-reacting against the surface configuration of optical parts. So the same polishing tool can be used in machining the optical parts with different curvature. The mechanism of the bonnet polishing is described in this paper firstly. Since the optical workpiece has been polished in the “polishing spot”, the bonnet polishing experiments have been accomplished on the trial-manufacturing machine to study the effect of technological parameters on the size and shape of “polishing spot” and the material removal rate of optical workpiece. At last, the material removal rules of the bonnet polishing have been given in the paper.

scholarly journals Study on the Electrorheological Ultra-Precision Polishing Process with an Annular Integrated Electrode

Micromachines ◽  
2021 ◽  
Vol 12 (10) ◽  
pp. 1235
Author(s):  
Cheng Fan ◽  
Yigang Chen ◽  
Yucheng Xue ◽  
Lei Zhang
Keyword(s):  
Surface Roughness ◽  
Particle Size ◽  
Applied Voltage ◽  
Abrasive Particle ◽  
Polishing Process ◽  
Workpiece Surface ◽  
Orthogonal Experiments ◽  
Single Process ◽  
Ultra Precision ◽  
Polishing Tool

Electrorheological (ER) polishing, as a new ultra-precision super-effect polishing method, provides little damage to the workpiece surface and is suitable for polishing all kinds of small and complex curved surface workpieces. In this paper, an ER polishing tool with an annular integrated electrode is developed. The orthogonal experiments are carried out on the six influencing factors of ER polishing which include the applied voltage, the abrasive particle size, the abrasive concentration, the polishing gap, the polishing time and the tool spindle speed. The influence order of these six factors on the ER polishing is obtained. On this basis, the effect of a single process parameter of ER polishing on surface roughness is studied experimentally.

An Investigation of Factors Affecting and Optimizing Material Removal Rate in Computer Controlled Ultra-Precision Polishing

2014 ◽  
Vol 625 ◽  
pp. 446-452
Author(s):  
Lai Ting Ho ◽  
Chi Fai Cheung ◽  
Liam Blunt ◽  
Sheng Yue Zeng
Keyword(s):  
Process Parameters ◽  
Material Removal Rate ◽  
Material Removal ◽  
Removal Rate ◽  
Orthopedic Implants ◽  
Polishing Process ◽  
Factors Affecting ◽  
Ultra Precision ◽  
Computer Controlled ◽  
The Impact

There are numerous parameters and steps involved in a computer controlled ultra-precision polishing process (CCUP). The success of CCUP relies heavily on the understanding and optimization of material removal when new materials and new surfaces are polished. It is crucial to optimize the polishing parameters to enhance the effectiveness of the polishing process and to assess the impact of different process parameters on the material removal rate of particular difficult-to-machine materials such as CoCr alloys, which is commonly used in orthopedic implants. This paper aims at studying the process parameters and optimization of the parameter to enhance the material removal rate and quantify the contribution of process parameters.

Ballonet Polishing of Aspheric Part Based on MRF Torque Servo

2012 ◽  
Vol 201-202 ◽  
pp. 653-656
Author(s):  
Xian Gen Ying ◽  
Di Zheng ◽  
Li Yong Hu ◽  
Jian Ming Zhan
Keyword(s):  
Material Removal ◽  
Decoupling Control ◽  
Polishing Process ◽  
Factors Affecting ◽  
Cnc Lathe ◽  
Working Principle ◽  
Material Removal Model ◽  
Main Factors ◽  
Polishing Tool ◽  
Removal Model

This paper proposed a new ballonet polishing method for the precise polishing of aspheric parts. The method is based on the integration of a MRT (Magnetorheological fluid Torque servo)-based ballonet polishing tool system and a CNC lathe. By using this method, the decoupling control of force-position-posture can be realized in polishing process. The structure and working principle of the polishing tool system were introduced. The material removal model for ballonet polishing was established according to Preston Equation. The main factors affecting the material removal were discussed, and the control model of uniform removal was put forward.

Study of Local Material Removal Model of Bonnet Tool Polishing

2006 ◽  
Vol 304-305 ◽  
pp. 335-339 ◽  
Author(s):  
Da Gang Xie ◽  
B. Gao ◽  
Ying Xue Yao ◽  
Zhe Jun Yuan
Keyword(s):  
Material Removal ◽  
Dwell Time ◽  
Removal Rate ◽  
Rate Model ◽  
Polishing Process ◽  
Flexible Membrane ◽  
Local Material ◽  
Internal Fluid ◽  
Material Removal Model ◽  
Removal Model

Bonnet tool polishing is a novel aspherical polishing method. This paper describes a method to obtain the local removal rate for the polishing process using bulbous flexible membrane covered with a polishing pad and pressurized by an internal fluid. According to the principle of bonnet polishing and Preston equation, the local removal rate model was established. It is confirmed by the experiments that the local removal depth has a linear relation with the dwell time. Preston coefficient can be calculated from the experimental data. Finally the expression of the local removal rate in bonnet tool polishing is acquired semi-empirically.

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