针对低塑性合金挤压成形时所需能耗大、材料利用率低等问题,提出了对凹模施加转动的成形新工艺———转模挤压成形技术,并设计了特殊的凹模结构.与芯模转挤压仅适于圆截面制品相比,对凹模施加转动可有效地避免异型截面制品挤出成形时引起的垂直模口部位轴向的＂切断＂等难题.数值模拟及理论分析表明：与普通挤压相比,凹模转挤压成形中塑性区范围显著扩大,使成形载荷极值降低了42.1%,且可有效地消除＂死区＂缺陷.
Due to the problem that high energy consumption and low material utilization ratio in extrusion process for lower plastic alloy,this paper proposes a new forming technology,named extrusion with steadily rotating container,and a set of special container is designed.Compared to the extrusion with rotating die,which is only applicable to circular section products,the new forming technology can effectively avoid the axial ＂cutting＂ of vertical die orifice during special-shaped products extrusion forming.The results show that,compared with conventional extrusion,the plastic zone expands significantly in the extrusion with rotating container,and the peak of forming load decreases by 42.1%.
参考文献
| [1] | 王斌,易丹青,顾威,王宏伟,吴春萍,方西亚.ZK60镁合金型材挤压过程有限元数值模拟[J].材料科学与工艺,2010(02):272-278. |
| [2] | X. Ma;M. R. Barnett;Y. H. Kim .Forward extrusion through steadily rotating conical dies Part I: experiments[J].International Journal of Mechanical Sciences,2004(3):449-464. |
| [3] | X. Ma;M. R. Barnett;Y. H. Kim .Forward extrusion through steadily rotating conical dies Part II: theoretical analysis[J].International Journal of Mechanical Sciences,2004(3):465-489. |
| [4] | J. Maciejewski;Z. Mroz .An upper-bound analysis of axisymmetric extrusion assisted by cyclic torsion[J].Journal of Materials Processing Technology,2008(1/3):333-344. |
| [5] | Gang Liu;Jie Zhou;Jurek Duszczyk .Finite Element Simulation of Magnesium Extrusion to Manufacture a Cross-Shaped Profile[J].Journal of manufacturing science and engineering,2007(3):607-614. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%