Ni–Nb–Zr–Ti amorphous alloys for glass lens molding die materials

2014 ◽  
Vol 116 ◽  
pp. 6-10 ◽  
Author(s):  
Shengxian Jiang ◽  
Mitsuhiro Abe ◽  
Masayuki Ando ◽  
Yuko Aono ◽  
Junpei Sakurai ◽  
...  
Keyword(s):  
Amorphous Alloys ◽  
Die Materials ◽  
Glass Lens ◽  
Lens Molding

Combinatorial Searching for Ni-Nb-Zr Amorphous Alloys as Glass Lens Molding Die Materials

2010 ◽  
Vol 447-448 ◽  
pp. 661-665 ◽  
Author(s):  
Junpei Sakurai ◽  
Mitsuhiro Abe ◽  
Masayuki Ando ◽  
Seiichi Hata
Keyword(s):  
Thermal Stability ◽  
Amorphous Alloys ◽  
Plasma Deposition ◽  
X Ray Diffraction ◽  
High Fracture ◽  
Thermal Stabilities ◽  
Suitable Material ◽  
Die Materials ◽  
Glass Lens ◽  
Lens Molding

This paper presents a search for Ni-Nb-Zr amorphous alloys for application as glass lens molding die materials. To efficiently screen candidate materials, we employed the combinatorial method partially to evaluate thermal stability. First, compositionally spread Ni-Nb-Zr libraries were fabricated by combinatorial arc plasma deposition (CAPD). In order to evaluate the high thermal stability, Ni-Nb-Zr amorphous samples in the libraries were annealed at 723K, the molding temperature for glass lens, for various times in vacuum. Phases in the annealed samples were identified by X-ray diffraction. From XRD identification, candidate amorphous samples with high thermal stabilities were screened. Sputtered samples with the same compositions as the candidate amorphous samples were then fabricated. Other desired properties for glass lens molding die materials, such as mechanical strength, machinability and anti-sticking properties, were evaluated. These investigations revealed Ni36Nb39Zr25 to be a suitable material for a new glass lens molding die. This material exhibited a high fracture stress f of 1.3 GPa, good heat resistance, good machinability, and excellent anti-sticking properties to molten glass.

435 Search for Pt-based amorphous alloys as functional glass lens molding die materials

2009 ◽  
Vol 2009.17 (0) ◽  
pp. _435-1_-_435-2_
Author(s):  
Junpei SAKURAI ◽  
Seiichi HATA ◽  
Ryusuke YAMAUCHI ◽  
Yuko AONO ◽  
Akira SHIMOKOHBE
Keyword(s):  
Amorphous Alloys ◽  
Die Materials ◽  
Glass Lens ◽  
Lens Molding

Application of Orthogonal Test in Numerical Simulation of Glass Lens Molding

2012 ◽  
Vol 497 ◽  
pp. 245-249
Author(s):  
Dao Cheng Zhang ◽  
Ke Jun Zhu ◽  
Yong Jian Zhu ◽  
Shao Hui Yin ◽  
Jian Wu Yu
Keyword(s):  
Process Parameters ◽  
Orthogonal Experiment ◽  
Fem Simulation ◽  
Orthogonal Test ◽  
Test Method ◽  
Testing Time ◽  
Molding Process ◽  
Glass Lens ◽  
Lens Molding ◽  
Process Factors

Glass lens molding is a high-volume fabrication method for producing optical components. In this paper, combined with the orthogonal test method and finite element method (FEM) simulation, the coupled thermo-mechanical analysis was carried out to analyze the key process factors. In order to reduce the testing time, an orthogonal test with three sets of level factors and three parameters is conducted to obtain the optimal molding process parameters. The result shows that the most significant parameter is molding velocity, the other effect parameters are molding temperature and friction coefficient. According to the previous analysis of orthogonal experiment, it is shown that the best optimal finishing process parameters were A2B1C1.

Design of Protective Coatings for Glass Lens Molding

2007 ◽  
pp. 655-661
Author(s):  
Kung Jeng Ma ◽  
H.H. Chien ◽  
W.H. Chuan ◽  
Choung Lii Chao ◽  
K.C. Hwang
Keyword(s):  
Protective Coatings ◽  
Glass Lens ◽  
Lens Molding

A Framework of Cooperative Design for Aspheric Glass-Lens Mold

2010 ◽  
Vol 97-101 ◽  
pp. 2965-2969
Author(s):  
Yong Jian Zhu ◽  
Shao Hui Yin ◽  
Wei Qing Pan ◽  
Yu Feng Fan ◽  
Kun Tang
Keyword(s):  
Error Compensation ◽  
Mechanical Design ◽  
Optical Design ◽  
Element Analysis ◽  
Cooperative Design ◽  
Aspheric Glass Lens ◽  
Glass Lens ◽  
Mold Fabrication ◽  
Lens Molding ◽  
Analysis Error

The lens molding technology has become a promising fabrication method for glass lens, especially for aspheric glass lens in batch. Because during the real compression molding, the error compensation for mold shape turns very difficult, the mold needs to be repaired repeatedly to meet the requirements of lens molding. To solve this problem, a cooperative design scheme is proposed. However, the scheme is not limited to solving the mold repairing; it also aims to providing the integrated and optimal design for aspheric glass-lens mold. In fact, the cooperative scheme is a collaborative software platform, which integrates with data processing, optical design, finite element analysis, error compensation and mechanical design for lens molding. On this platform, users only need to submit the (camera) lens parameters or measured data of aspheric lens, and then the platform can provide the final mold drawings, which will be input in the CNC software of ultra-precision machine and guide the mold fabrication. Meanwhile, the cooperative platform is Network-based PDM system, so designers could remotely communicate with it and help to finish the mold design jointly. In this case, the cooperative design could tremendously improve the efficiency and accuracy of lens molding.

119 Development and machining of Pt based amorphous alloys for glass lens forming die

2007 ◽  
Vol 2007.15 (0) ◽  
pp. 49-50
Author(s):  
Seiichi HATA ◽  
Ryusuke YAMAUCHI ◽  
Junpei SAKURAI ◽  
Akira SHIMOKOHBE
Keyword(s):  
Amorphous Alloys ◽  
Glass Lens

FEM Analysis of Glass Lens Molding Press

2013 ◽  
Vol 652-654 ◽  
pp. 1961-1965 ◽  
Author(s):  
Jian Zhou ◽  
Mu Jun Li ◽  
Lian Guan Shen
Keyword(s):  
Residual Stress ◽  
Volume Change ◽  
Fem Analysis ◽  
Key Factors ◽  
Spherical Lens ◽  
Whole Process ◽  
Glass Lens ◽  
Annealing Rate ◽  
Lens Molding

Glass molding press is an efficient and promising process for glass lens manufacturing. Molding temperature and velocity are crucial factors for pressing, and the annealing rate directly influences the residual stress and volume change of the final lens. The research contributes to studying the key factors that influence the quality of the molded lens. In the paper, by incorporating stress relaxation and structural relaxation of the viscoelastic material, numerical simulation is undertaken to determine the proper process parameters. Furthermore, the whole process of a spherical lens molding is simulated to predict the final residual stress and volume change, also the influence of different annealing rates is estimated.

Combinatorial Searching for Noble Metal-based Thin Film Amorphous Alloys for Glass Lens Mold

2007 ◽  
Vol 1024 ◽  
Author(s):  
Junpei Sakurai ◽  
Seiichi Hata ◽  
Ryusuke Yamauchi ◽  
Hiroyuki Tachikawa ◽  
Akira Shimokohbe
Keyword(s):  
Thin Film ◽  
Amorphous Alloys ◽  
Fracture Stress ◽  
Diamond Tool ◽  
Plasma Deposition ◽  
Amorphous Region ◽  
Glass Mold ◽  
Arc Plasma ◽  
Thermal And Mechanical Properties ◽  
Glass Lens

AbstractThis paper presents the properties of Pt-based thin film amorphous alloys developed for a glass lens mold. To search for the amorphous alloys, Pt-Zr-Ni and Pt-Hf-Ni thin film libraries were fabricated using combinatorial arc plasma deposition (CAPD). The composition ranges of the amorphous region in each library were 50 to 60 at.% Pt, 0 to 20 at.% Ni, and balance being Zr or Hf. To evaluate the thermal and mechanical properties of these amorphous alloys, Pt51Zr39Ni10 and Pt52Hf36Ni12 samples, as typical amorphous samples, were prepared by sputtering. The Pt51Zr39Ni10 sample showed a crystallization temperature, Tx, of 939 K and a fracture stress, σf, of 1.44 GPa. The Pt52Hf36Ni12 sample showed a Tx of 978 K and a σf of 0.3 GPa. The Pt51Zr39Ni10 and Pt52Hf36Ni12 samples did not achieve the target Tx (973K) and σf (1.0 GPa). In order to achieve the target properties, Zr was displaced with Hf to increase the Tx of Pt-Zr-Ni and four Pt51HfxZr37-xNi12 samples were prepared. The Pt51Hf20Zr17Ni12 sample had a Tx of 992 K and a σf of 0.87 GPa, and almost achieved the target properties. The machinability of the Pt51Hf20Zr17Ni12 sample was also evaluated. Though this sample could be cut using a diamond tool, it did not show sufficient machinability. In order to improve the accuracy of the glass mold shape, the machinability of the Pt-based thin film amorphous alloys require further modification.

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