摘要
针对取力器传动轴的结构特点,设计了多道次的成形工艺方案,对其中的核心工序塑性扩孔和内花键挤压,运用有限元软件Deform-3D进行了模拟分析。根据分析得到的成形过程中金属材料的流动规律和凸模载荷状况,针对内花键挤压时出现的金属刨削式撕下现象,在凸模冲头花键前端增加导向角并对导向角的角度进行多次模拟试验,选取60°导向角。经小批量生产验证,扩孔和内花键均采用200 t液压机,经多次模拟改进的内花键挤压方案切实可行,扩孔内花键挤压处无切削加工现象,无褶皱、裂纹等缺陷,几何尺寸精度达IT8级,可以投入批量生产。
Based on the structural characteristics of the power take-off transmission shaft, multi-pass extrusion technology was designed. The core processes of plastic pipe-expanding and internal spline extrusion were analyzed by the finite element software Deform-3D. The flow regulation of metallic materials and the punch load condition in the forming process were obtained. The orientation angle in front of the punch spline was increased with simulated test for several times, and the orientation angle of 60° was chosen, so that the tear phenom- enon of planning-type in the internal spline extrusion process was avoided. The small quantities production of pipe-expanding and internal spline extrusion was carried out by 200 t hydraulic press. The results show that the modified technology program of internal spline extru- sion by multiple simulations is feasible. There is no planning-type tear phenomenon and defects such as wrinkles, cracks and so on. The geometry precision reaches grade IT8, and mass production will be possible.
出处
《锻压技术》
CAS
CSCD
北大核心
2015年第2期98-102,共5页
Forging & Stamping Technology
基金
江苏省企业研究生工作站项目
关键词
取力器
传动轴
扩孔
内花键挤压
power take-off
transmission shaft
pipe-expanding
internal spline extrusion
