枣弧形零件温楔横轧研究

发布时间：2018-03-18 12:45

本文选题：枣弧形零件　切入点：温楔横轧　出处：《沈阳理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：楔横轧技术作为一种生产轴类零件的成熟工艺技术,由于其在生产中较传统生产工艺有材料利用率高,生产效率高,生产成本少,零件寿命高,成型质量好等方面的优势而被人们所广泛应用。当前由于楔横轧技术专注与轴类零件的生产,所以对枣弧形零件这种特征零件的研究还很少。本文以楔横轧理论知识为基础,进而就关于枣弧形特定零件的成形工艺进行了温楔横轧模拟研究,提出了辊式成形和板式两种成形两种方法,同时对板式成形方案进行了仿真模拟结果分析。主要是利用三维造型软件ProE建模,通过有限元分析软件DEFORM-3D对枣弧形零件的有限元模拟,最终对模拟结果进行了轧件的轴向截面、中心径向截面的应力、应变分析,以及在轧制过程中的变形载荷在X、Y、Z三个方向的变化规律;同时研究了轧件的始温和轧制速度对轧件中心温度的影响以及对轧制力影响分析,利用金属位移法分析出了凹心现象产生的原因。并利用DEFORM-3D中的点追踪功能就轧件径向中心的金属位移和应力应变的变化,分析出了轧件产生裂纹缺陷的区域。最后进行了同等设计参数下相关的辊式轧制实验,获得了成型效果较好的零件,并就轧件内部缺陷进行了裂纹检测,通过金相试验验证了裂纹的存在。最终提出了可以通过降低轧制温度和轧制速度的方法消除裂纹的方法。
[Abstract]:As a mature technology for producing shaft parts, cross wedge rolling technology has high material utilization ratio, high production efficiency, low production cost and high component life. The advantages of good forming quality have been widely used. Due to the focus of cross wedge rolling technology and the production of shaft parts, there is little research on the characteristic parts of jujube arc parts. This paper is based on the theoretical knowledge of cross wedge rolling. Furthermore, the simulation research on the forming process of the special parts of jujube arc is carried out, and two methods of roll forming and plate forming are put forward. At the same time, the simulation results of plate forming scheme are analyzed. The 3D modeling software ProE is used to model, and the finite element analysis software DEFORM-3D is used to simulate the jujube arc part. Finally, the axial section of the rolling piece is simulated. The stress and strain analysis of the central radial section and the variation of the deformation load in three directions in the rolling process are studied, and the influence of the initial temperature and the rolling speed on the center temperature and the rolling force are also studied. The causes of the concave phenomenon are analyzed by using the metal displacement method, and the variation of metal displacement and stress and strain in the radial center of the workpiece is studied by using the point tracing function of DEFORM-3D. The region of crack defect is analyzed. Finally, the relative roll rolling experiment under the same design parameters is carried out, and the parts with good forming effect are obtained, and the internal defects of the workpiece are detected. The existence of crack was verified by metallographic test, and a method to eliminate the crack by reducing rolling temperature and rolling speed was put forward.
【学位授予单位】：沈阳理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG335

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