铸件变形控制的研究

通过测量Ａｌ－Ｃｕ４．５％合金矩形杆件的变形动态曲线及挠度曲线，研究了杆件变形的特点，以及杆件的尺寸因素，各种工艺条件对控制变形的影响，得到如下结果：（１）矩形杆的变形挠曲线符合方程ｙ＝ｋｘ＾２，（２）矩形杆的变形随高度增大呈先增大后减小的变化趋势；（３）提高浇注温度，铸型初始温度，减小底板的激冷能力能有效地控制变形。

Study of casting deformation's controlling

The character of casting deformation and the relationship between every kinds of effect factors and deformation are investigated by measuring deformation curve and warping curve of Al Cu4.5% alloy, rectangle stick castings. The following results are valuable: (1) Warping curve equation of rectangle stick castings deformation is y=kx 2 ; (2) The more the height of castings is, the more the deformation is firstly, but later on, the less; (3) Deformation can be controlled effectively by increasing port temperature, initial mold temperature and decreasing chilling ability of mold.