为计算高速线材精轧阶段椭圆一圆孔型系统的非均匀变形程度,分析了等效矩形法的基本原理,发现两等效矩形间的相交矩形面积是求解等效应变的关键.假设孔型入口、出口轧件断面均为椭圆,并忽略切应变,由此提出了一种不进行矩形转换而求解等效应变的新方法,称为相交面积法(简称OA法).为检验OA法的有效性,将其应用于φ6.5 mm线材精轧的温升计算.计算结果与实测温升符合较好,相对误差小于10%.利用计算数据回归了精轧机组道次累积总温升和人口温度的关系模型.结果表明:总温升随入口温度的降低而近似线性地升高.
参考文献
| [1] | William F H.Metal Forming Mechanics and Metallurgy[M].Enghwood Cliffs:Prentice-Hall Inc,1983 |
| [2] | Richardson G J.Worked Examples in Metal Working[M].Losdon:The Chameleon Press Limited,1985 |
| [3] | Shinokura T;Takai K A .New Method for Calculating Spread in Rod Rolling[J].Journal of Applied Metal Working,1982,2(02):94. |
| [4] | F. Capece Minutolo;M. Durante;F. Lambiase .Dimensional Analysis in Steel Rod Rolling for Different Types of Grooves[J].Journal of Materials Engineering and Performance,2005(3):373-377. |
| [5] | Lee Y;Choi S;Kim Y H .Mathematical Model and Experimental Validation of Sudaee Profile of a Workpiece in RoundOval-Round Pass sequence[J].Journal of Materials Processing Technology,2000,108(01):87. |
| [6] | Y. Lee;H.J. Kim;S.M. Hwang .Analytic model for the prediction of mean effective strain in rod rolling process[J].Journal of Materials Processing Technology,2001(2):129-138. |
| [7] | ZHAO De-wen;WANG Guo-dong;BAI Guang-run .Theoretical Analysis of the Wire Drawing Through Two Roller Dies in Tandem[J].Science in China(Series A),1993,36(05):632. |
| [8] | 赵德文,白雪峰,王晓文,刘相华,王国栋.热线理论计算线材精轧机组的温升[J].钢铁,2006(10):42-45. |
| [9] | 赵德文,谢英杰,刘相华,王国栋.以上界三角形速度场计算线材精轧温升[J].东北大学学报（自然科学版）,2006(09):983-986. |
| [10] | 周纪华;管克智.金属塑性变形阻力[M].北京:机械工业出版社,1989 |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%