According to the difficulty of cutting the ZTC4 material, slot cutting experiments were designed and three directional dynamic milling force were obtained. Instantaneous milling force model and multiple linear regression was used to analyze three directional milling force coefficients and edge milling force coefficients. To evaluate the performance of the dynamic milling force model, a new slot cutting experiment was designed. The comparison of simulations and experiments indicates the average milling force error are 5.74%, 3.93%, 7.98%, the dynamic milling force prediction model fits well in cycle, trend and amplitude. The feasibility and accuracy of the model for predicting the instantaneous milling force is verified.
Diffractive optical elements are widely used in optical systems due to their excellent dispersion characteristics. Precision molding technology is an effective way to solve mass optical processing. Based on the precise molding of the chalcogenide glass diffractive optics, in this paper microstructure filling and process parameter sensitivity of diffractive optical elements are analyzed. The research results show that the use of appropriate process parameters can ensure the filling of diffractive microstructures. The cooling rate in the slow cooling stage is the most important factor affecting the surface shape.
Chalcogenide glass is widely used in infrared area for its cheap and good performance of infrared transmittance. Compare with the traditional material signal crystal germanium, zinc sulfide, zinc selenide etc. Chalcogenide glass is suit for precision molding for the low soften temperature which is suit for large mass industry production. And precision glass molding(PGM) is a kind of technology involving the molding machine, mold material, the glass, molding parameters etc. So the researches on the forming characteristic of precision glass molding are necessary. In this paper, the FEM simulation is used to assist research of the forming characteristic, especially the friction coefficient effect on the forming. At the last the surface profile compensation and micro-replication of molding is discussed.
Compare with the manufacturing of the traditional infrared material, such as signal crystal germanium, zinc sulfide, zinc selenide etc, chalcogenide infrared glass is suitable for precision molding for the low soften temperature to have large mass industry production. So the researches of precision glass molding are necessary, especially for the fast development of infrared product. The mold design is one of the key technologies of precision glass molding. In this paper, the mold processing of a sample chalcogenide glass from the technical drawing, mold design, molding to the lens are introduced. From the result of the precision molding, the technology of finite element simulation is a useful way to guiding the mold design. The molded lens by using mold process fit the design requirement.
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