Contour spiral bevel gear can be modeled in the modeling module of UG, but this method is only for a fixed size gear. If the size of contour spiral bevel gear is changed, it must be re modeled in the modeling module of UG. This method is cumbersome. Using UG / OpenGRIP equal height teeth for three-dimensional automatic modeling, there is no need for complex manual operation. If equal height teeth of different sizes are required, only different parameters need to be input. Therefore, using UG / OpenGRIP for automatic modeling can reduce calculation, improve design efficiency and modeling accuracy.
The three-dimensional solid model of equal height spiral bevel gear and the automatic modeling program of cold / hot forging model are established mainly through UG / OpenGRIP. The main work contents are as follows:
(1) Based on the established parameter equation, through the grip modeling programming language, the parametric solid modeling methods of spherical involute, extended epicycloid, equal height spiral bevel gear matrix and tooth profile are established, and the parametric automatic modeling module of equal height tooth three-dimensional solid model is developed, which is fast, convenient and convenient High precision 3D solid modeling of equal height teeth.
(2) According to the comprehensive requirements of forging technology and subsequent machining, the reasonable addition methods of tooth width allowance, tooth surface allowance, tooth top allowance and tooth root allowance are analyzed and established, and the small end tooth top and the big end of equal height spiral bevel gear are trimmed, as well as the draft inclination and forging fillet are added, The automatic modeling of cold forging model of equal height spiral bevel gear is realized.
(3) In order to realize the precision forming of gear, considering the influence law of temperature and elastic deformation on the size of equal high tooth spiral bevel gear, the size of equal high tooth spiral bevel gear model is accurately corrected, and the accurate establishment of gear hot forging model is completed.
(4) Using UG / openmenuscript script program, the toolbar menu of equal height spiral bevel gear is designed to facilitate the call of executable files and improve the modeling efficiency. Through the comprehensive comparison with the existing modeling results and theoretical results of equal height spiral bevel gear module, it shows that the automatic modeling results in this paper have high precision, and contain all the information such as point, line, surface and entity, which is convenient for subsequent editing and operation.