| Couplings are commonly used in the mechanical drive system, due to the current processing methods for dowel pin hole of flexible pin coupling is the drilling, reaming or turning, so there is a material waste, low efficiency and other defects. Because of the hydroforming technology saves material and its high production efficiency advantages, it has a very wide range of applications in many field, research hydroforming technology on flexible pin coupling has very important significance.By studying the flexible pin coupling works and hydroforming process, determined the feasibility of hydroforming technology in the flexible pin coupling applications. Firstly, improved the design of Y-axis hole LX1 elastic pin coupling structure, which was divided into two parts, on which part of the transmission can be set for processing by hydroforming technology. Then completed the theoretical analysis of the transmission hydroforming process, and studied the extent of its forming bulging, wall thickness and stress-strain state and got the formula for calculating the initial yield stress, cracking pressure and clamping force. On the basis of theoretical calculations, used finite element software ABAQUS to complete the numerical simulation of the forming process, researched the effect of the tube wall thickness, internal pressure and friction on hydroforming performance, and determined the applicable process parameters of its forming. Finally, through the analysis of hydroforming equipment, identified selection principles of key components and designed hydroforming dies and researched punches seal.This article determined the feasibility of hydroforming technology in the coupling transmission through theoretical analysis and finite element simulation, and provided effective guidance for the next hydroforming experiments and product. |
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