| 引用本文: | 王先模,汤明军,陈泽丰,冀寒松,张翔宇,张建富.钛合金承力孔二步挤压强化数值模拟与工艺优化[J].材料科学与工艺,2025,33(6):23-34.DOI:10.11951/j.issn.1005-0299.20240045. |
| WANG Xianmo,TANG Mingjun,CHEN Zefeng,JI Hansong,ZHANG Xiangyu,ZHANG Jianfu.Numerical simulation and process optimization of two-step cold extrusion for titanium alloy hole part[J].Materials Science and Technology,2025,33(6):23-34.DOI:10.11951/j.issn.1005-0299.20240045. |
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| 钛合金承力孔二步挤压强化数值模拟与工艺优化 |
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王先模1,汤明军1,陈泽丰2,3,冀寒松2,3,张翔宇2,3,张建富2,3
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(1.昌河飞机工业(集团)有限责任公司, 江西 景德镇 333000; 2.清华大学 精密超精密制造装备及控制北京市重点实验室,北京 100084;3.高端装备界面科学与技术全国重点实验室(清华大学),北京 100084)
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| 摘要: |
| “承力孔-紧固件”是飞机常用的连接形式,二步挤压强化结合底孔强化和衬套压合两种增益形式,具有广阔的发展前景。然而,两道工序对孔疲劳性能的耦合作用机理尚不明晰,无法充分发挥工艺潜力,且由于衬套阻碍,难以有效开展承力孔实验件的表面形性检测。因此,以钛合金承力孔-不锈钢衬套-高速钢芯棒为例,开展二步挤压强化工艺数值模拟与参数优化研究。首先,测试材料性能,建立有限元仿真模型；然后,通过单因素仿真阐明二步挤压强化作用机制,筛选出显著影响因素并初步优化；接下来,开展显著影响因素耦合仿真,建立最大挤压力、挤压后平均残余应力与变形量预测方程,平均预测误差分别为2.55%、5.78%、8.89%；最后,解耦显著影响因素的独立作用机制,得到优化工艺参数。所阐明的工艺参数作用机制和所获取的优化工艺参数可用于指导实际工艺的开展,以充分发挥二步挤压强化的疲劳增益潜力。 |
| 关键词: 承力孔 二步挤压强化 钛合金 工艺优化 数值模拟 |
| DOI：10.11951/j.issn.1005-0299.20240045 |
| 分类号:TH122 |
| 文献标识码:A |
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| Numerical simulation and process optimization of two-step cold extrusion for titanium alloy hole part |
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WANG Xianmo1, TANG Mingjun1, CHEN Zefeng2,3, JI Hansong2,3, ZHANG Xiangyu2,3, ZHANG Jianfu2,3
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(1.AVIC Changhe Aircraft Industry (Group) Co., Ltd., Jingdezhen 333000, China; 2.Beijing Key Laboratory of Precision and Ultra-Precision Manufacturing Equipment and Control, Tsinghua University, Beijing 100084, China; 3.State Key Laboratory of Tribology in Advanced Equipment(Tsinghua University), Beijing 100084, China)
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| Abstract: |
| Bearing hole-fastener" is a common connection form used in aircrafts. The two-step hole extrusion process, which combines hole strengthening and bushing press fitting, has broad prospects. However, the coupling mechanism of hole fatigue performance of the two subprocesses is not yet clear and the process potential cannot be sufficiently exerted. In addition, due to the hindrance of bushing, it is difficult to carry out surface integrity detections after experiments. Therefore, taking Titanium alloy hole-stainless steel bushing-high speed steel mandrel as the example, a numerical simulation and parameter optimization work of the two-step hole extrusion process is carried out. Firstly, the material properties are tested and a FEM model is established. Secondly, single-factor simulations are carried out to clarify the mechanism of two-step hole extrusion process, and significant influencing factors are screened out and initially optimized. Then, coupling simulations of significant factors are carried out, and prediction equations for the maximum force, mean residual stress and mean deformation are established, with the mean prediction errors of 2.55%, 5.78% and 8.89%. Finally, the independent action mechanism of significant influencing factors is decoupled, and then the final optimized process parameters are achieved. The coupling mechanism of process parameters and the optimized parameter values obtained in this work can be used to guide the implementation of actual process, so as to give full play to the fatigue gain potential of the two-step hole extrusion process. |
| Key words: bearing hole two-step hole extrusion titanium alloy process optimization numerical simulation |
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