锻压技术

闭挤式精冲直齿轮的材料流动分析

英文标题：Material flow analysis on spur gear of closed extruding fine blanking

作者：邓明刘潞周吕琳马一龙

单位：重庆理工大学

分类号：TG381

出版年,卷(期):页码：2014,39(6):114-117

摘要：

运用Deform-3D软件对闭挤式精冲直齿轮的材料流动特性进行数值模拟，分析了闭挤式精冲直齿轮成形过程中的反顶力对变形区材料流动特性和废料区涡流情况的影响。分析结果表明，反顶力可以有效延缓废料区材料涡流的消失，延迟拉应力出现，从而抑制产生早期裂纹；分析了齿顶、齿根面上材料流动情况，得出材料只在轴线方向流动，其他方向无明显流动，成形时齿根面受到的挤压作用大于齿顶面；观察齿轮成形试件的齿顶和齿根部无明显挤压纤维，验证了模拟结果的正确性。

Deform-3D software was applied to analyze the material flow of the closed extruding fine blanking gear. It was analyzed that the effects of counterpunch forces on the material flow characteristics in deformation zone and the swirling flow in scrap. The result shows that the counterpunch force can effectively delay the disappearance of swirling flow and the generation of tensile stress, then restrain the cracks appearing early. By analyzing the flow characteristics of tip and root of tooth, it is obtained that the material flow rate on tooth tip is much greater than tooth root in axial direction, and there is almost not material flow in horizontal sections; the compressive stress is greater in tooth root. The simulated result was confirmed by metallographic fiber in different sections.

基金项目：

国家自然科学基金资助项目（51375521）；重庆市科技攻关计划项目（cstc2012gg-yyjs60009）

参考文献：

［1］邓明，吕琳. 一种闭式挤精冲成形方法[P].中国专利， ZL200710093225.6，2009-7-15Deng Ming, Lv Lin,A method of closed extruding fine-blanking[P].China, ZL200710093225.6，2009-7-15
［2］Lee T C，Chen L C，Zheng P F. Application of the finite element deformation method in the fine blanking process[J].Journal of Materials Producing Technology，1997, 63(1-3)：744-749.
［3］张会杰，吕琳，邓明.闭挤式精冲工艺过程的数值模拟及参数优化[J].锻压装备及制造技术，2010, 45（2）：73-76.Zhang Huijie,Lv Lin,Deng Ming.The numerical simulation and parameters, optimization for closed extruding fine-blanding process[J]. China Metalforming Equipment & Manufacturing Technology, 2010, 45（2）：73-76.
［4］Thipprakmas S,Masahiko J. An investigation of material flow analysis in fine blanking process[J]. Journal of Materials Processing Technology,2007, (192-193): 237-242.

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