论文部分内容阅读
本文就一个结构模型用物理参数对铸件表面的粗糙度进行了估算,并且讨论了工艺参数对粗糙度的影响。通过举例,证实理论值与实际值完全一致。 一、前 言 熔模铸型是由形状不规则、大小不同的砂粒组成。通过粘结剂将其无序地联接起来,形成无规则的孔隙系统。浇注时,铸型表面的液体金属,通过孔隙渗入铸型一定深度,并在界面张力与渗透压力的作用下保持平衡状态。此时,渗入到铸型表面颗粒之间的液体
In this paper, a structural model was used to estimate the roughness of the casting surface with physical parameters, and the influence of the process parameters on the roughness was discussed. By example, it is confirmed that the theoretical value is exactly the same as the actual value. First, the introduction of investment casting is irregular shape, size of the sand composition. Unbundled by an adhesive to form a random pore system. Pouring, the liquid metal on the surface of the mold, through the pores into the mold a certain depth, and under the effect of interfacial tension and osmotic pressure to maintain equilibrium. At this point, liquid penetrated into the mold surface particles