锻压技术

不锈钢无扩口导管挤压连接成形数值模拟和试验研究

英文标题：Numerical simulation and experimental research on extrusion connection forming for stainless steel flareless tube

作者：张凌云冯越鹏孙伟光肖军雷

分类号：V26

出版年,卷(期):页码：2019,44(12):56-64

摘要：

为了提高航空液压导管接头的可靠性，对不锈钢无扩口导管挤压连接成形中的关键问题进行了有限元模拟分析。针对DN8的无扩口导管模拟结果总结得出：胀形压力在160~200 MPa之间可以得到好的成形效果；对于不同厚度的胶套，得出最佳的使用长度范围；导管和导套之间存在0.1 mm的间隙配合时，胀形压力需要达到180 MPa。利用优化后的工艺参数进行无扩口导管挤压成形连接试验，试验后利用显微图像软件测量变形区域的管壁厚度,其与有限元数值模拟的厚度分布情况相吻合，且最大误差不超过8%，验证了本文工艺参数优化的合理性，对无扩口导管挤压连接成形工艺具有一定的指导意义。

In order to improve the reliability of aviation hydraulic tube joints, the key problems in the extrusion connection forming for stainless flareless tube were analyzed by the finite element simulation. The simulation results for flareless tube DN8 show that a good forming effect is obtained under the bulging pressure between 160 MPa and 200 MPa. For different thicknesses of rubber sleeves, the best range of lengths is given. When the clearance fit between tube and guide sleeve is 0.1 mm, the bulging pressure needs to reach 180 MPa. Furthermore, the extrusion connection forming test of flareless tube was conducted by the optimized process parameters, and the thickness of tube wall in the deformation area was measured by the microscopic image software,which is consistent with the thickness distribution of the finite element numerical simulation. Thus, the maximum error is less than 8%, and the rationality of the optimization for process parameters is verified, which has certain guiding significance for the extrusion connection forming process of flareless tube.

基金项目：

张凌云(1963-)，男，博士，教授 E-mail：zhangly79@163.com 通讯作者：冯越鹏(1995-)，女，硕士研究生 E-mail：fypbonnie@163.com

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