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目前拉杆接头主要采用开式模锻成形,内孔采用切削方法加工,但开式模锻成形产生较大飞边,材料利用率低(下料量5.5kg),切削加工效率低,工艺过程复杂,且破坏了金属的纤维组织,从而导致拉杆使用寿命短且成本高。本文利用数值模拟与试验相结合的研究方法,对拉杆接头采用闭式多向模锻工艺成形,有效地避免了在成形过程中坯料拆叠和充不满等缺陷,并且,模锻件无飞边,初步成型出2个内孔,减少了材料的消耗和切削加工量,优化后的下料量为3.5kg,节约材料36.4%。
At present, the pull rod joint mainly adopts the open die forging process, and the inner hole is machined by the cutting method. However, the open die forging produces a large flash, the material utilization rate is low (5.5 kg), the machining efficiency is low, and the process is complicated , And the destruction of the metal fiber organization, resulting in short service life and high cost rod. In this paper, the research method of numerical simulation and experiment is used to shape the rod joint by the closed multi-direction forging process, which effectively avoids defects such as blank disassembly and dissatisfaction in the forming process, The initial formation of two boreholes, reducing the material consumption and cutting capacity, the amount of material after the optimization of 3.5kg, saving 36.4% of the material.