Manufacturing Technology 2023, 23(5):739-749 | DOI: 10.21062/mft.2023.098

Design of a Photoelectric Measuring Robot for Straightness of Deep/Blind Hole with Automatic Centering Function

Haifeng Zhao ORCID...1,2
1 Department of Intelligent Manufacturing, Nanjing Information Vocational and Technical College, Nanjing 210023, China
2 Jiangsu Provincial Robot Micro Servo Engineering Research Center, Nanjing 210023, China

In order to quickly measure the straightness parameters of the deep hole/blind hole axis, a robot for measuring the straightness of the deep hole/blind hole axis based on the photoelectric prin-ciple is designed. Using the linearity of the laser as a reference, the straightness of the inner hole can be detected through the function that the PSD sensor can accurately locate the position of the energy center of the light. By studying the relationship between the position of the light spot and the output voltage of the PSD device, the measurement model of the straightness of the deep hole axis is derived. During the measurement, the robot spiral driving mechanism moves back and forth inside the deep/blind hole, and the automatic centering mechanism realizes the precise positioning of the deep/blind hole axis. The laser fixed on the axis of the automatic centering mechanism can illuminate the PSD target to obtain the current position data of the deep/blind hole axis. Use the least square median method to eliminate the gross error of the obtained data, and the least square principle fitting can obtain the measurement results of the current axis straightness. In order to ensure the measurement accuracy, the measuring robot is calibrated by a standard ring gauge and used for the age of the pipe with an inner diameter of 135mm to obtain an error accuracy of less than 0.05 mm for the axis.

Keywords: Deep/blind hole, Straightness, Photoelectric measurement, Self-centering device, Position sensitive detector
Grants and funding:

This research was funded by the major Project of Basic Science Research of Higher Education Institutions in Jiangsu Province (2022KJA460012); The intelligent robot project of the Science and Technology Development, Center of the Ministry of Education: the design of multifunctional inspection robot for underground pipelines based on multi-source information fusion (2021JQR014) project. Author are grateful for Jiangsu Provincial Department of Education and Beijing Iron Man Robot Company

Received: August 21, 2023; Revised: October 26, 2023; Accepted: November 13, 2023; Published: December 6, 2023  Show citation

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Zhao H. Design of a Photoelectric Measuring Robot for Straightness of Deep/Blind Hole with Automatic Centering Function. Manufacturing Technology. 2023;23(5):739-749. doi: 10.21062/mft.2023.098.
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