塑料斜齒輪齒廓修形研究及注塑工藝優(yōu)化
[Abstract]:Gear transmission is a kind of widely used mechanical transmission. Involute helical cylindrical gear is widely used in many fields because of its stable transmission and strong substitutability. In this paper, the tooth profile modification and injection molding technology of plastic helical cylindrical gear are analyzed. In this paper, the finite element method and ANSYS contact analysis algorithm are introduced. The advantages and disadvantages of Lagrange algorithm, penalty function method and extended Lagrange method are compared, and the theoretical basis of ANSYS contact analysis for helical gears is established. According to the involute and helix generating principle of helical gear, the involute equation and helix equation are established, and the three-dimensional geometric model of helical gear is constructed by using the parameterized design in Pro/E, and introduced into the structural analysis software ANSYS, discretized into tetrahedron mesh. The contact pair was set up and the gear contact analysis model was established according to the assembly relation. The contact analysis of helical gear was carried out by ANSYS software and the stress distribution was simulated. According to the analysis results and the tooth profile modification principle, the gear profile modification is carried out. The contact analysis results show that the interference in the meshing place has been improved significantly. The injection molding process of helical gear was simulated by Moldflow software, and the position, quantity and layout of the gate were optimized. Through the comparison of different injection molding process schemes, reasonable injection molding and pressure keeping process parameters were selected. For the later mold design, injection molding process control to provide a feasible scheme. The actual forming results of helical gear show that the method proposed in this paper is effective.
【學位授予單位】:鄭州大學
【學位級別】:碩士
【學位授予年份】:2011
【分類號】:TH132.41
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