2010•Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIERequires access
Design of internal screw thread measuring device based on the Three-Line method principle
Dachao Hu, Jianguo Chen
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Abstract
In accordance with the principle of Three-Line, this paper analyze the correlation of every main parameter of internal screw thread, and then designed a device to measure the main parameters of internal screw thread. Internal thread parameters, such as the pitch diameter, thread angle and screw-pitch of common screw thread, terraced screw thread, zigzag screw thread were obtained through calculation and measurement. The practical applications have proved that this device is convenience to use, and the measurements have a high accuracy. Meanwhile, the application for the patent of invention has been accepted by the Patent Office (Filing number: 200710044081.5).