|
摘要：
|
|
利用Simufact.Forming软件对TC4钛合金叶片的精锻过程进行了数值模拟研究，分析了叶片成形后其等效应力场、等效应变场、温度场的分布情况，研究了不同坯料温度、模具温度、上模速度、摩擦系数等工艺参数对叶片表层金属流动的影响。研究结果表明：叶片周围的毛边区域等效应力较小、等效应变较大、温度较高；最大等效应力点易出现在靠近叶尖的叶身头部、榫头与叶身的连接处、榫头头部及尾部区域；榫头区域的等效应变和温度最低，叶身中部区域的等效应变和温度较高；叶片各区域的Z方向速度方向一致，而叶尖与叶身中部之间区域的X、Y方向速度则出现正、反两个方向的变化，易导致折叠缺陷。叶片榫头区域的金属流动速度受工艺参数影响较小，其流动速度较为缓慢，接近于0；而叶身与榫头连接处附近区域的金属流动速度受工艺参数影响较大，提高坯料温度、上模速度、摩擦系数，都可使其金属流动速度增大，而模具温度的升高则会导致金属流动速度的减小。
|
|
The precision forging process of TC4 titanium alloy blade was simulated by software Simufact.Forming, and the distributions of equivalent stress field, equivalent strain field and temperature field after blade forming were analyzed. Then, the influences of different process parameters such as billet temperature, mold temperature, upper mold speed and friction coefficient on the metal flow of blade surface were studied. The results show that the equivalent stress in the burr area around the blade is smaller, the equivalent strain is greater, and the temperature is higher. Then, the maximum equivalent stress point is easy to appear in the head of blade body near the blade tip, the joint of tenon and blade body and the head and tail areas of tenon. However, the equivalent strain and the temperature in the tenon region are the lowest, and the equivalent strain and the temperature in the middle region of blade body are higher. Furthermore, the velocities along the Z direction in each area of the blade are consistent, while the velocities along the X and Y directions in the area between the blade tip and the middle of blade body change in both forward and reverse directions to cause folding defects easily. In addition, the velocity of metal flow in the tenon area of blade is less affected by the process parameters, its flow velocity is relatively slow to close to zero, and the velocity of metal flow near the joint of blade body and tenon is greatly affected by the process parameters. Thus, the velocity of metal flow increases with the increasing of billet temperature, upper mold speed and friction coefficient, and the increase of mold temperature leads to the decrease of the velocity of metal flow.
|
|
基金项目：
|
|
国家自然科学基金资助项目（51475146，51475366）
|
|
作者简介：
|
|
吴捍疆（1992-），男，硕士研究生，E-mail：764649866@qq.com；通讯作者：张丰收（1972-），男，博士，教授，E-mail：fengshouzhang@163.com
|
|
参考文献：
|
[1]马有福. 叶片精密锻造成形质点流动规律研究[D]. 洛阳：河南科技大学, 2016.
Ma Y F. Study on the Flow Law of Shaped Particles Caused by Precision Forging of Blades[D]. Luoyang: Henan University of Science and Technology, 2016.
[2]李峰, 苑世剑,何祝斌.导流角对挤压变形中金属流动与缺陷的影响[J].材料科学与工艺,2007, 15(1):15-18.
Li F, Yuan S J, He Z B. Effect of guiding angle on metal flow and defects in extrusion deformation[J]. Material Science and Technology, 2007, 15(1):15-18.
[3] 刘诗汉, 马虎.航空涡轮叶片叶身造型参数化设计[J].兵工自动化,2015, 34(4):56-63.
Liu S H, Ma H. Parameterization of modeling the aero-turbine blade based on CATIA[J].Ordnance Industry Automation, 2015, 34(4): 56-63.
[4]鲍斌斌.叶片精锻成形性能分析及工艺参数优化[D]. 洛阳：河南科技大学, 2016.
Bao B B. Analysis of Blade Precision Forging Forming Performance and Optimization of Process Parameters[D]. Luoyang: Henan University of Science and Technology, 2016.
[5]张晓露,李付国,彭富华,等. 基于热加工图的TC4合金热成形性能研究[J].航空材料学报,2007, 27(5):40-44.
Zhang X L, Li F G, Peng F H, et al. Hot workability of Ti-6Al-4V alloy based on processing map [J]. Journal of Aeronautical Materials, 2007, 27(5):40-44.
[6]霍光.70 MN叶片压制液压机研发设计[J]. 锻压装备与制造技术,2015, 50(6):31-34.
Huo G. Research and design of 70 MN hydraulic press for blade[J]. China Metalforming Equipment & Manufacturing Technology, 2015, 50(6):31-34.
[7]刘惠,康尚明,王少华,等.大规格复杂曲面叶片精密模锻成形工艺设计及优化[J].锻压技术,2019, 44(2):7-12.
Liu H, Kang S M, Wang S H, et al. Design and optimization on precision die forging process of large complex curved blade[J]. Forging & Stamping Technology, 2019, 44(2):7-12.
[8]张文东,唐广波,李权,等.H型钢热轧过程中温度场应变场及金属流动模拟[J].云南冶金,2010, 39(2):70-74.
Zhang W D, Tang G B, Li Q, et al. Simulation of temperature field, strain field and metal flow in the process of heat rolling of H-beam [J].Yunnan Metallurgy,2010, 39(2):70-74.
[9]单慧云,张驰,白梅,等.基于数值模拟的低碳钢热轧金属流动规律研究[J].重庆理工大学学报: 自然科学, 2017,31(7):96-101.
Shan H Y, Zhang C, Bai M, et al. Numerical simulation study of mental flow law of low-carbon steel in hot rolling[J]. Journal of Chongqing Institute of Technology: Natural Science,2017,31(7):96-101.
[10]路光,张治民,薛勇,等.复杂外筋筒体精密挤压成形工艺及金属流动规律研究[J].热加工工艺,2014,43(9):120-122,126.
Lu G, Zhang Z M, Xue Y, et al. Study on technology and metal flow law of precise extrusion forming of tube with complex outer ribs[J].Hot Working Technology,2014,43(9):120-122,126.
[11]马劲红, 姚晓晗,任喜强,等. 轧制工艺参数对H型钢金属流动规律的影响[J]. 河北联合大学学报: 自然科学版, 2014, 36(4): 42-46.
Ma J H, Yao X H, Ren X Q, et al. The influence of rolling parameters on metal flow law of H-beam[J]. Journal of Hebei United University: Natural Science Edition, 2014, 36(4): 42-46.
[12]李静媛, 黄东男.三孔双芯模挤压方管型材的金属流动行为分析[J]. 材料科学与工艺,2010,18(2):251-261.
Li J Y, Huang D N. Analysis of extrusion flow behaviors of square pipe deformed with three-porthole and two-core die[J]. Materials Science and Technology,2010,18(2):251-261.
|
|
服务与反馈：
|
|
【文章下载】【加入收藏】
|
|
|
|
