锻压技术

基于数值模拟的锥形螺母冷镦挤成形分析及模具设计

英文标题：Deformation analysis and die design of cold heading extrusion for a conical nut based on numerical simulation

作者：梁建平1 程旺军2

分类号：

出版年,卷(期):页码：2015,40(7):151-155

摘要：

提出了一种锥形螺母冷镦挤成形新工艺，运用三维有限元分析软件Deform-3D，模拟了锥形螺母的冷镦挤成形过程，获得了管状坯料在凹模型腔中的流动速度场和温度场分布。结果表明：管状坯料经塑性变形可以完全充满整个模腔，螺纹部位成形饱满，并且没有出现较大的余料飞边和断料缺口；整个挤压过程也未出现大面积的温度不均匀和烧损现象，采用管状坯料冷镦挤成形锥形螺母的工艺是可行的。由此，设计出一套锥形螺母的冷镦挤成形模具，最后通过试验进行了验证。

A new cold heading extrusion process for forming a conical nut was presented，and the forming process was simulated by three-dimensional finite element software Deform-3D. The distributions of the flow velocity field and the temperature field of the tubular billets in the process of filling the die cavity were obtained, respectively. The results show that the die cavity can be fully filled by the plastic deformation process of tubular billets. The threads of the forming conical nut are completely full and without larger flashes and broken material gaps. The phenomena of a large area of uneven temperature and hot damage do not occur during the whole extrusion process，which indicates that cold heading extrusion process for producing a conical nut by tubular billet is feasible. Finally, a set of die structure for cold heading extrusion of the conical nut was designed and the result was validated by the test.

基金项目：

国家自然科学基金资助项目 (51274149)

梁建平 (1968-), 男，学士，高级工程师

参考文献：

[1] 于凤江. 锥形螺母膨胀螺栓在设备安装中的应用[J]. 黑龙江纺织, 2012, (2): 26-28.

Yu F J. Application of cone expansion bolt in equipment installation[J]. Heilongjiang Textile, 2012, (2): 26-28.

[2]李泽勇，张宝红，于建民，等. 内六方空心件挤压成形金属流动规律研究[J]. 锻压技术, 2014, 39(3): 132-136.

Li Z Y, Zhang B H, Yu J M, et al. Study on the law of metal flow for hexagon hollow pieces in extrusion forming process[J]. Forging & Stamping Technology, 2014, 39(3): 132-136.

[3]马钦. 大规格螺母热挤压模设计[J]. 模具制造, 2011, (3): 65-67.

Ma Q. Design of hot extrusion die for the big size nut[J]. Die & Mould Manufacture, 2011, (3): 65-67.

[4]曾宪文，任先玉，李季云，等. 农用汽车轮胎螺母冷挤压成形工艺的研究[J]. 农业机械学报, 1996, (3): 156-157.

Zeng X W, Ren X Y, Li J Y, et al. The study on cold extrusion forming process for tyre nut in the agricultural use[J]. Transactions of the Chinese Society for Agricultural Machinery, 1996, (3): 156-157.

[5]李建平, 夏祥生, 万元元, 等. 大尺寸内齿轮冷挤压成形工艺研究[J]. 锻压技术, 2013, 38(3): 7-11.

Li J P, Xia X S, Wan Y Y, et al. Technical research on cold extrusion of large size internal gear[J]. Forging & Stamping Technology, 2013, 38(3): 7-11.

[6]黄小龙，黎向锋，左敦稳，等. 内螺纹冷挤压成形过程数值模拟[J]. 塑性工程学报, 2012, 19(2): 11-16.

Huang X L, Li X F, Zuo D W, et al. Numerical simulation on cold extrusion process of internal thread based on DEFORM[J]. Journal of Plasticity Engineering, 2012, 19(2): 11-16.

[7]缪宏，左敦稳，张瑞宏，等. Q460高强度钢内螺纹冷挤压试验研究[J]. 机械工程学报, 2011, 47(13): 160-166.

Miao H, Zuo D W, Zhang R H, et al. Experimental research on cold extruding of internal thread in Q460 high-strength-steel[J]. Journal of Mechanical Engineering, 2011, 47(13): 160-166.

[8]Kang G J, Song W J, Kim J, et al. Numerical approach to forging process of a gear with inner cam profile using FEM[J]. Journal of Materials Processing Technology, 2005, 164: 1212-1217.

[9]胡建军，李小平. DEFORM-3D 塑性成形CAE应用教程[M]. 北京：北京大学出版社, 2011.

Hu J J, Li X P. Deform-3D on Plastic Forming CAE Application[M]. Beijing: Peking University Press, 2011.

[10]李倩，蒋智，钟志平，等. BJ型钟形壳温锻反挤压工艺数值模拟及实验研究[J]. 锻压技术, 2011, 36(2): 23-26.

Li Q, Jiang Z, Zhong Z P, et al. Numerical simulation and experiment on warm cold precision forging process for BJ type outer race[J]. Forging & Stamping Technology, 2011, 36(2): 23-26.

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