A New Method for Precision Measurement of Wall-Thickness of Thin-Walled Spherical Shell Parts

Micromachines

Wen Huang¹  Dongxing Du¹  Bo Pan²  Yongbo Xu²  Jiang Guo²  Renke Kang²  Juntao Zhang² 

[1] Institute of Mechanical Manufacturing Technology, China Academy of Engineering Physics, Mianyang 621999, China;Key Laboratory for Precision and Non-Traditional Machining Technology of Ministry of Education, Dalian University of Technology, Dalian 116024, China;

关键词: spherical shell;    thin-walled part;    wall-thickness;    benchmark coincidence;    data processing;   

DOI  :  10.3390/mi12050467

来源: DOAJ

【 摘 要 】

Thin-walled parts are widely used in shock wave and detonation physics experiments, which require high surface accuracy and equal thickness. In order to obtain the wall thickness of thin-walled spherical shell parts accurately, a new measurement method is proposed. The trajectories, including meridian and concentric trajectories, are employed to measure the thickness of thin-walled spherical shell parts. The measurement data of the inner and outer surfaces are unified in the same coordinate system, and the thickness is obtained based on a reconstruction model. The meridian and concentric circles’ trajectories are used for measuring a spherical shell with an outer diameter of Φ210.6 mm and an inner diameter of Φ206.4 mm. Without the data in the top area, the surface errors of the outer and inner surfaces are about 5 μm and 6 μm, respectively, and the wall-thickness error is about 8 μm with the meridian trajectory.

【 授权许可】

Unknown