Research on Static and Dynamic Characteristics of the Optical Free-Form Milling Machine

doi:10.12068/j.issn.1005-3026.2022.05.010

Abstract

Abstract: An optical free-form milling machine is designed according to the technological characteristics of optical component manufacturing and the finite element(FE)modeling and static and dynamic characteristics analysis of the optical free-form surface milling machine are carried out. The results show that， at the original position under gravity load， when the gravity balance device is not working， the straightness of guide rail is 0.7μm， and when the gravity balance device is working， the straightness of guide rail is 0.035μm， when the gravity balance device is not working， the straightness of lead screw is 2.3μm， and when the gravity balance device is working， the straightness of lead screw is 0.2μm. The natural frequencies of the optical free-form surface milling machine with different structural schemes and material schemes are extracted， and the vibration mode shows that the first vibration mode of the milling machine that affects the machining precision is the third order， the optimal design scheme of dynamic characteristics is that the Z-axis motor of the milling machine is installed on the roof and the milling machine structure material uses natural granite， and the milling machine structure material using natural granite compared with cast iron can significantly improve the dynamic characteristics of the milling machine.

Key words: optical free-form surface milling machine; static and dynamic characteristics; mechanical shunt; gravity balance; finite element(FE)

CLC Number:

TP20

LI Qi， YU Tian-biao， WANG Wan-shan. Research on Static and Dynamic Characteristics of the Optical Free-Form Milling Machine[J]. Journal of Northeastern University(Natural Science), 2022, 43(5): 674-680.

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