Numerical Simulation Reaserch on Bending Force of Bending Parts with Overlapped Corner of TZM Alloy Sheet
-
摘要: 在板料弯曲成形中,弯曲力直接影响着成形设备的选择,降低弯曲力可以有效减小成形设备的损耗。通过对温成形过程进行一定的简化假设,利用数值模拟软件对TZM合金板料包角弯曲件的温成形过程进行模拟,研究了弯曲力的变化规律,分析了毛坯开口深度、凸模倒角半径和圆角半径、摩擦系数等参数对温成形过程中的弯曲力的影响。结果表明:温成形过程中弯曲力在不同参数下的变化规律基本一致;开口缝、凸模倒角和凸模圆角只对最大弯曲力产生影响,而摩擦系数对整个成形过程中的弯曲力产生影响。弯曲力最大值与开口缝、凸模倒角和凸模圆角成反比,与摩擦系数成正比。Abstract: In the process of sheet metal bending forming,bending force directly influences the forming equipment choice and the reduction of bending force can effectively decrease the loss of forming equipment.Through setting a certain warm forming assumptions,the warm forming of bending parts with overlapped corner of TZM alloy sheet was numerically simulated.The change rule of bending force was studied,and the influence on bending force by some parameters such as blank opening depth,punch fillet radius and punch round radius,friction coefficient was analyzed.The results show that the change rule of bending force is basically consistent under different parameters;blank opening depth,punch fillet radius and punch rounded corner radius only have impact on max bending force,but friction coefficient has impact on bending force of whole forming process.Max bending force is inversly proportional to blank opening depth,punch fillet radius and punch round radius,and proportional to friction coefficient.
-
Key words:
- alloy sheet /
- bending force /
- warm forming /
- bending forming /
-
[1] 岳睿. 带状金属板材弯曲的回弹[J].塑性工程学报,2009,16(2):29-32 [2] 李建,赵军,展培培. 板料自由弯曲成形及回弹理论解析[J].塑性工程学报,2009,16(4):1-6 [3] 朱东波,马雷,李涤尘. 复杂形状板料冲压件回弹评价指标研究[J].机械科学与技术,2000,19(6):953-956 [4] 苏春建,赵军,官英平. 宽板U形自由弯曲智能化控制过程的解析定量描述[J].塑性工程学报,2009,16(3):1-8. [5] 周勇,卢险峰,杨雪春. U形件自由弯曲力理论计算新模型[J].南昌大学学报,2009,31(3):299-303 [6] 雷正保. 汽车覆盖件冲压成形CAE技术[M].长沙:国防科技大学出版社,2003 [7] 林忠欣. 车身覆盖件冲压成形仿真[M].北京:机械工业出版社,2005 [8] Cockeram B V. The mechanical properties and fracture mecha-nisms of wrought low carbonarc cast(LCAC),molybdenum-0.5pet titanium-0,1 pet zirconium(TZM) and oxide dispersionstrengthened(ODS)molybdenum flat products[J].Materials Science and Engineering,2006,A418:120-136 [9] 朱超. 超高强度钢板的热冲压成形模具设计及优化[D].长春:吉林大学,2010 [10] 林建平,王立影,田浩彬. 超高强度钢板热冲压成形研究与进展[J].热加工工艺,2008,32(17):140-144 [11] 李晶,王林,付静波. Mo-La合金厚板的力学性能研究[J].中国钼业,2008,32(2):52-54 [12] 印雄飞,何丹农,叶又. 虚拟速度对板料成形数值模拟影响的实验研究[J].机械科学与技术,2000,19(3):452-453 [13] 牟林,胡建华. 冲压工艺与模具设计[M].北京:中国林业出版社,2006 [14] 杨曼云,孙希平,胡忠勇. 汽车覆盖件成形数值模拟过程及影响因素研究[J].模具技术,2006,(1):3-8 -
点击查看大图
计量
- 文章访问数: 127
- HTML全文浏览量: 14
- PDF下载量: 2
- 被引次数: 0
下载:
