This paper mainly carries out three-dimensional automatic modeling of equal high tooth spiral bevel gear and its precision forging die, and studies its forging process. Through the derivation of the three-dimensional modeling parameter equation of equal height teeth, the corresponding equal height tooth forging model is obtained with the help of UG / OpenGRIP secondary development tool; Further, the precision forging die of equal height teeth is designed and modeled, and finally the forging process of equal height teeth is studied.
- Summarize and explain the research and application status and future development trend of equal height spiral bevel gear, point out the current problems from the current research, and then put forward the research content and research scheme.
- Based on the machining principle of equal height spiral bevel gear and the generalization process of gear modeling, various curve parameter equations involved in the modeling process of equal height spiral bevel gear are derived, including spherical involute, extended epicycloid and corresponding basic geometric principle parameters, and the classification of equal height teeth is discussed.
- According to the parameter equation and generalization process of gear modeling, the three-dimensional solid model of equal high tooth spiral bevel gear is modeled through UG / OpenGRIP, and then the forging allowance, draft angle and forging fillet are added to the gear model, and the gear model is trimmed to obtain the cold forging model of gear; Considering the influence of temperature and elastic deformation on the gear size, a suitable internal flash is designed, and finally the hot forging model of equal height spiral bevel gear is obtained.
- According to the structure of gear forging, the characteristics of process flow, the relevant standards of die design and the die equipment in actual production, the two-dimensional model diagram of precision forging die suitable for practical application is designed, including ejector rod, upper and lower modules, upper and lower backing plates, prestressed ring, pressing ring, die base, guide post and guide sleeve, threaded hole and bolt, etc, The modeling of 3D solid model of precision forging die is completed in UG / OpenGRIP.
- Obtain the stress-strain curve of 20CrMnTiH steel through thermal compression test, construct the constitutive model and draw the hot working diagram, extract the appropriate forging conditions, and define the new material in deform; The performance parameters of gear material and die material are obtained, the corresponding simulation die model is obtained, the appropriate blank section shape is designed, and the reasonable selection of blank parameters is carried out. Finally, the post-processing analysis of forging simulation and the analysis of die stress and deformation are carried out.
- The future prospect of equal high tooth spiral bevel gear is prospected.