Firstly, the object of the end face spiral gear that needs reverse modeling is scanned in three dimensions. After the three-dimensional scanning of the end face spiral gear, the dense point cloud file of the end face spiral gear is obtained, as shown in the figure. The reverse engineering point cloud file of end face spiral gear is the basis of reverse modeling in the later stage. Its principle is that when the laser emitted by the three-dimensional scanner is projected on the object, it will be reflected back to the equipment. The returned laser will contain the orientation information of the reflection point, and the equipment will record these point information and reflect it into the coordinate system generated by the software, Finally, a reverse engineering point cloud file containing the position information of some points of the model is formed. In the scanning process, we often set an appropriate scanning accuracy to facilitate the follow-up work.
At the same time of three-dimensional scanning, we can also measure some parameters of the end face spiral gear through the existing measuring tools, which is convenient to check the accuracy of the scanning equipment and correct the modeling results in the later stage. In the preparation stage, we can first measure the outer diameter dimension D and the number of teeth n of the end face spiral tooth.