METHOD FOR MAKING CASTING PLAN UTILIZING SIMPLE SOLIDIFYING ANALYSIS

摘要

PURPOSE:To secure calculating accuracy with little modeling man-hour by obtaining heat flow flux to a mold under consideration of casting condition related to material characteristic value to heat, temp. and time for the mold and executing heat transferring calculation to the whole casting. CONSTITUTION:1: Cross sectional shape at the part to which solidifying analysis of the casting except the mold is applied is shown as two-dimensional model composed of fine elements. 2: Nodal points of fine elements constituting the two-dimensional model are stratified into groups in which thickness sizes in vertical direction to the cross section can be approximated to the same, and the representative nodal point of this group and the thickness size are inputted. 3: Calculating condition is imputted. 4: On the casting surface element in the fine elements for the two-dimensional model, the heat flow flux to the mold is obtd. in consideration of the material characteristic value to heat and the constants for the mold and non- stationary heat transferring calculation is executed on the whole casting. 5: The heat transferring calculation in the direction perpendicular to the cross section in each representative nodal point is executed. 6: The calculated result of the item 4 in each representative nodal point and the nodal point in the same group is corrected based on the result of the item 5. 7: The process of the items 4-6 is repeated till completing the solidification. 8: The change of plan is executed based on the result of the item 7, and the process of the items 1-7 is repeated till it is decided that the defect does not exist.