论述熔融沉积制造（ＦＤＭ）技术的成形机理，建立ＦＤＭ工艺堆积成形过程的传热模型，并对这类边界移动的传热模型采用数值解的方法求出在成形过程中层间对应位置上的温度分布情况，为分析粘结效果提供直接的理论依据。通过实际成形实验，验证控制成形面散热条件对成形质量的作用 The formation mechanism of FDM was discussed, and the heat transfer model of FDM process was built. The heat transfer model of this kind of boundary movement was solved by numerical solution to get the corresponding position in the process of forming Temperature distribution, to provide a direct theoretical basis for the analysis of the bonding effect. Through the actual forming experiment, the effect of controlling the cooling condition of the forming surface on the forming quality was verified