螺纹加工有限元分析.doc

ee 螺纹加工的有限元分析 ee ( ee) 指导教师: ee [ 摘要] 传统的螺纹加工方法不仅加工效率低,而且切断了金属材料的纤维流向,严重降低了内螺纹的质量,难以满足生产中对螺纹连接件高精度、高强度的要求,而冷挤压成形是一种无屑加工方法,大大提高了螺纹的抗拉强度和抗疲劳性能。本文利用 DEFORM 软件对螺纹加工过程进行了仿真分析,实现了一般挤压攻丝过程和振动挤压攻丝过程的有效模拟。在一般攻丝过程中,分析了挤压速度对螺纹加工中丝锥所受应力,应变以及扭矩的影响,底孔直径对螺纹加工过程中应力应变以及扭矩的影响。并且完成了轴向振动攻丝与一般挤压攻丝的比较,发现振动攻丝过程中丝锥所受扭矩、应力、温度明显减小。[ 关键词]: 内螺纹冷挤压挤压丝锥振动攻丝有限元分析 ee Finite Element Analysis of Thread Processing ee ( ee) Tutor : ee [ Abstract] The traditional thread processing method is not only low the processing efficiency, and cut off the flow of metal materials fiber, seriously reduce the quality of the internal thread, difficult to meet the requirements of the production of threaded connection high-precision, high-intensity, cold extrusion isa scrap processing methods, greatly improved the tensile strength and fatigue resistance of the thread. In this paper, utilize the DEFORM software to achieve simulation analysis of thread processing, achieved effective simulation of the general extrusion process and the extrusion process of vibration. In the process of general tapping, analysis the effect of the extrusion speed for the stress 、 the strain and the torque to the tap. the effect of the bottom outlet diameter for the stress 、 the strain and the torque to the tap , pare circle vibration tapping with the general squeeze tapping. Found in the process of vibration tapping tap the torque, stress, temperature significantly reduced. [Key words] : internal thread, cold extrusion, extrusion tap, vibration tapping, Finite Element Analysis III 目录 1绪论............................................................................................................. 1 内螺纹冷挤压成形技术概述..................................................................... 1 内螺纹的主要加工技术............................................................................. 2 .1. 传统的内螺纹加工技术...................................................................... 2 .2. 内螺纹加工的新技术.............................................................