inspection machine for blade surface

 

 

WANG Xin jian, ZHOU Jun

 

(College of Mechanical and Electrical Engineering, Hohai University, Changzhou 213022, China)

 

 

Abstract: Aiming at the low inspection efficiency, vulnerability of the subject judge, and the easy to wear laser probe and workpiece surface by contact were measurement of blade inspection system, a new inspection approach of laser scanning which is along the normal of the blade section contour were put forward. By effectively dividing blade theoretical points by convex hull algorithm, fragmented fitting theoretical points were achieved, fitting precision of theoretical blade contour line was enhanced, and the motion path of the laser probe was accurately planned. A four coordinate testing system was used to realize the coincidence between the directions of both the laser probe and the normal of theoretical inspection point. Servo feedback signal and serial port communication technology enables the laser scanning inspection and real time data collection. An inspection platform was found to inspect both 912L blade and the precision of the inspection system. The results indicate that the system can realize automatic inspection and avoid the wear on the laser probe and workpiece surface, effectively improving the inspection efficiency and the effectuation the inspection precision requirement.

 

Key words: blade surface; laser inspection; fitting; four coordinate