Abstract: The thickness prediction of the adhesive layer on the blade web is usually made by pressing the plasticine during the blade trial closing process. The thickness of the plasticine measured is the thickness of the adhesive layer on the web. In this paper, a measurement method is proposed to scan the shape of blade skin and web by means of three-dimensional laser scanning technology, and to obtain the mold closing die by simulating the mold closing mode, and to measure the die closing clearance of the blade web. In this paper, the three-dimensional laser scanning is used to measure the closing clearance of the blade web, and the measured data are compared with the data of the plasticine pressed by the trial closing die. The 3D laser scanning measurement can be used as a method to measure the clamping gap of the blade web to achieve the trial-free clamping measurement. This paper analyzes the main factors affecting the measurement accuracy.

Key words: wind-power blades, 3D laser scanning, mold closing gap, simulation analysis, composites