The deformation mechanism during the solidification was analyzed based on the experimental results of the castings. An approximate quadratic differential equation and its discrete model of calculation deflection were proposed. The model indicates that the key factors leading to the deflection deformation are the thermal bending moment M and the flexural rigidity EJ. The smaller the former and the larger the latter is, the smaller the deflection deformation will be. The experiments are carried out at various technical conditions, and their results appear good agreement with calculation ones. A method was proposed to predict and control the casting deformation.
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