scholarly journals Precision Polishing Techniques for Metal Molding Dies and Glass Forming Technology “Slumping Method”

2021 ◽  
Author(s):  
Akira Shinozaki ◽  
Junpei Kinoshita
Keyword(s):  
Surface Roughness ◽  
Glass Plate ◽  
Plate Surface ◽  
Optical Components ◽  
Glass Forming ◽  
Forming Technology ◽  
Die Surface ◽  
Polishing Machine ◽  
Manufacturing Techniques ◽  
20 Nm

Precision manufacturing techniques are required for the fabrication of small and large optical components in various fields. To prepare molding dies with highly precise geometric shapes and surface roughness that are used in certain molding processes, polishing techniques have been investigated for many materials. In this research, the polishing techniques used for a SUS310S stainless steel molding die for the glass forming technology “slumping method” were investigated. The surface roughness of the polished SUS310S molding die surface was below Rz = 120 nm (P–V), Ra = 20 nm after 35 h of polishing with 0.5% alumina polishing liquid under a pressure of 1.7 kPa. In addition, the centerless polishing machine was designed and manufactured to polish cylindrical molding die surfaces with same polishing conditions. As the result of using cylindrical molding dies that made by this centerless polishing machine, the surface roughness of the glass plate formed using the slumping method with the polished molding die was below Ra = 20 nm. These results indicate that the surface roughness of the molding die had a small effect on the glass plate surface formed using the slumping method.

scholarly journals Influence of the molding die surface roughness for glass forming technique “Slumping method”

2019 ◽  
Vol 2019.13 (0) ◽  
pp. D35
Author(s):  
Akira SHINOZAKI ◽  
Jumpei KINOSHITA ◽  
Takeshi SAKAMOTO ◽  
Koji AKASHI ◽  
Yoshiharu NAMBA
Keyword(s):  
Surface Roughness ◽  
Glass Forming ◽  
Die Surface

Study on Dual-Plane Ball Polishing Method for Finishing Ceramics Ball

2013 ◽  
Vol 797 ◽  
pp. 444-449 ◽  
Author(s):  
Kai Ping Feng ◽  
Zhao Zhong Zhou ◽  
Bing Hai Lv ◽  
Ju Long Yuan
Keyword(s):  
Surface Roughness ◽  
Process Parameters ◽  
Mechanical Damage ◽  
Lower Plate ◽  
Mathematics Model ◽  
Polishing Process ◽  
High Quality ◽  
Dual Plane ◽  
Surface Polishing ◽  
Polishing Machine

This paper represents a dual-plane polishing method for ceramics ball. Compared with traditional ball polishing method, its upper and lower plate are all flat and easy to use soft pad to polish, so it can largely reduce the surface mechanical damage and obtain high quality processing surface. This paper analyzes surface polishing trajectory by calculation and simulation to test the polishing trajectory uniformity. A mathematics model of polishing process is established to disintegrate the process of a balls movement. Experiment is operated in dual-plane planetary polishing machine. The result shows that perfect polishing surface and spherical error can be obtained under the proper process parameters, the surface roughness achieves 4nm and the spherical error can reach 0.217μm.

scholarly journals Hydraulic physical model production with Computer Numerically Controlled (CNC) manufacturing techniques

2018 ◽  
Vol 40 ◽  
pp. 05065 ◽  
Author(s):  
Pierre-Yves Henry ◽  
Jochen Aberle ◽  
Christy Ushanth Navaratnam ◽  
Nils Ruther
Keyword(s):  
Surface Roughness ◽  
Physical Models ◽  
Roughness Effects ◽  
Scaled Model ◽  
Construction Methods ◽  
Roughness Elements ◽  
Computer Numerically Controlled ◽  
Complex Boundary ◽  
Manufacturing Techniques ◽  
Scaled Models

Physical models are a well-accepted tool in hydraulic engineering, allowing for the detailed characterisation of flow processes and the validation of structure designs with complex boundary conditions. The methods used to construct physical models typically produce a surface roughness which does not necessarily scale with the surface roughness of the prototype. In this context, this paper discusses novel construction methods allowing a detailed reproduction of roughness elements in scaled models, such as Computer Numerically Controlled (CNC) manufacturing techniques and bed casting techniques. In particular, the present paper details the protocols developed to mill out a correct representation of the complex rock-fractured geometry of a closed channel which was obtained from Terrestrial Laser Scanners. The novelty of this scaled model production is the implementation of optical accesses in a closed (pressurized) hydraulic model, to allow for Particle Image Velocimetry measurements with a minimum impact on the reproduced roughness elements. The effectiveness of this production protocol is discussed in the context of modelling the roughness effects on the flow regime.

Effects of Machining Parameters on Surface Roughness when Ultra-High Precision Diamond Turning RSA443 Optical Aluminum

2019 ◽  
Vol 287 ◽  
pp. 30-34
Author(s):  
Zwelinzima Mkoko ◽  
Khaled Abou-El-Hossein
Keyword(s):  
Surface Roughness ◽  
Silicon Content ◽  
Cutting Speed ◽  
Cutting Parameters ◽  
Diamond Turning ◽  
Machining Parameters ◽  
Turning Process ◽  
Optical Components ◽  
Box Behnken Design ◽  
Factors Influencing

In the globally competitive environment, surface roughness and finer tolerances are becoming stringent and certainly most critical for optical components. The aim of this study is to determine the effects of diamond turning process parameters on surface finish when diamond turning RSA 443 alloy having high silicon content. This alloy is a new grade of aluminum that has a potential to be used for production of various optical components. The experiments were conducted based on the Box-Behnken design with three diamond-turning parameters varied at three levels. A mathematical regression model was developed for predicting surface roughness. Further, the analysis of variance was used to analyze the influence of cutting parameters and their interaction in machining. The developed prediction model reveals that cutting speed and feed rate are the most dominant diamond turning factors influencing surface roughness.

Fibre Orientation Control Related to Papermaking

2006 ◽  
Author(s):  
A. Carlsson ◽  
F. Lundell ◽  
L. D. So¨derberg
Keyword(s):  
Shear Flow ◽  
Flow Field ◽  
Surface Structure ◽  
Fibre Orientation ◽  
Flow Direction ◽  
Glass Plate ◽  
Ccd Camera ◽  
Plate Surface ◽  
Steerable Filters ◽  
Fibre Suspension

The wall effect on the orientation of fibres suspended in a shear flow has been studied experimentally. A fibre suspension, driven by gravity down an inclined glass plate, constitutes the shear flow field. A CCD-camera was mounted underneath the flow in order to visualize the flow. The orientation of fibres in the plane perpendicular to the plate was determined, by using the concept of steerable filters. In a region close to the smooth plate surface the fibres oriented themselves perpendicular to the flow direction. This did not occur when the surface structure was modified with ridges.

Synthesis of Carbazole Modified Glass Plate for Detecting Nitroaromatic Compounds

2012 ◽  
Vol 557-559 ◽  
pp. 1074-1077
Author(s):  
Xue Ming Dong ◽  
Yue Zhi Cui ◽  
Tian Duo Li
Keyword(s):  
Contact Angle ◽  
Photoelectron Spectroscopy ◽  
Glass Plate ◽  
Nitroaromatic Compounds ◽  
Plate Surface ◽  
X Ray ◽  
Carbazole Derivatives ◽  
H Nmr ◽  
Fluorescence Measurements ◽  
Sensing Performance

A novel of carbazole derivatives containing –Si-OCH3 groups was successfully synthesized by reaction of carbazole with γ-chloropropylmethyldimethoxysilane. By immobilizing the carbazole derivatives on a glass plate surface through the chemical reaction of -Si-OCH3 and -Si-OH, a novel photoinduced luminescence film sensors was prepared. The structures of carbazole derivatives was determined by means of 1H NMR and the film was characterized by fluorescence measurements, contact angle, X-ray photoelectron spectroscopy. The sensing performance of the functionalized glass sensor has been evaluated.

Study on the Polishing Mechanism of Low Temperature Co-Fired Ceramic for Microsystem Application

2008 ◽  
Vol 375-376 ◽  
pp. 47-51
Author(s):  
Ji Jun Zhu ◽  
Ju Long Yuan ◽  
Simon S. Ang
Keyword(s):  
Surface Roughness ◽  
Low Temperature ◽  
Integrated Systems ◽  
Polishing Machine

Multilayer ceramics based on the low-temperature co-fired ceramics (LTCC) are gaining increasing interests in the manufacturing of highly-integrated systems for microelectronic and micro-system applications. The polishing experiments of sintered LTCC using a custom-built precision polishing machine are reported in this paper. First, a micro-fluidic distributor was fabricated using LTCC. Then, the polishing of this meso-MEMS system was studied using several polishing parameters. By optimizing the polishing parameters, the surface roughness can be reduced to 4 nm.

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