In the process of reverse modeling of spiral bevel gear by reverse engineering, there will be errors in the process of data acquisition, point cloud data processing and model reconstruction. In order to check whether our model meets the requirements and find out the shortcomings of modeling, we need to analyze the error of the reconstruction model of spiral bevel gear, modify the shortcomings of the reconstruction model according to the error value obtained from the analysis, ensure the smooth progress of product development and secondary innovation, design qualified products that meet the production requirements and reduce the R & D cost, So as to reduce the production cost.
The tooth surface accuracy of spiral bevel gear reverse engineering is the main factor affecting the transmission performance of spiral bevel gear. Use the “measurement – surface deviation – point cloud deviation” command in Imageware software to analyze the error of the tooth surface of spiral bevel gear, analyze the deviation between the reconstructed surface and the point cloud before processing, and the error analysis between the tooth surface and the point cloud is shown in the figure; According to the error analysis, the geometric standard deviation of the tooth surface is 0 046 2 mm, the maximum deviation is 0.5 mm 398 7 mm; The lateral standard deviation of the tooth surface is 0 mm, and the maximum deviation is 0 000 4mm ; The negative normal standard deviation is 0 044 mm, the maximum deviation is -0.5 mm 277 7 mm; The normal standard deviation is 0 047 6 mm with a maximum deviation of 0.5 398 7 mm。
At present, there are no clear provisions on the deviation requirements and standards of gear parts in the process of reverse design. Here, the deviation analysis of the reconstructed tooth surface of spiral bevel gear before and after treatment is carried out, that is, the deviation is less than 0.5% of the overall size 5% is regarded as class I, and the size of spiral bevel gear is 85 mm, so the deviation value is ± 0.5% 425 mm is class I, so it can be seen that its modeling accuracy meets the requirements of class I. Therefore, the reconstructed model meets the requirements of modeling accuracy.
Through data acquisition, point cloud data processing, reconstruction model and tooth surface error analysis of spiral bevel gear, and with the help of Geomagic studio, Imageware and Pro / E software, the reverse modeling of spiral bevel gear is systematically completed. There are some errors in the modeling process, which can be solved through mat Lab software is optimized to improve the modeling accuracy of products to meet customers’ requirements for higher accuracy of products. After completing the gear optimization, the obtained three-dimensional model is imported into Pro / E, and the NC programming is generated by Pro / e. the spiral bevel gear entity can be processed by importing the programming into the NC milling machine.
The reverse modeling of spiral bevel gear is explored and studied. This method has certain guiding significance for the future application of reverse engineering in the reverse modeling of medium and high-precision products, makes up for the shortcomings of the traditional processing methods of spiral bevel gear, provides a certain theoretical basis for product development and secondary innovation, shortens the product design cycle and saves the design cost, Thus, the production cost is reduced, the foundation is laid for the transformation of enterprises to single piece and small batch production mode, and the competitiveness and adaptability of enterprises are enhanced.