砂芯高温膨胀对气缸体曲轴箱壁厚的影响

摘要

介绍硅砂的高温膨胀过程.以缸体非加工部位壁厚为例,通过试验说明硅砂高温膨胀引起的砂芯膨胀会减薄铸件壁厚,同时说明采用壁厚补贴的方法可以弥补砂芯高温膨胀对引起的壁厚减薄,使铸件壁厚达到设计要求.%The high temperature expansion process of silica sand was introduced. Taking wall thickness in the non-machined area of cylinder block as example, it was showed by experiment thal the sand tore expansion caused by the high temperature expansion of silica sand might reduce the casting wall thickness,as well as,using the method of adding wall thickness allowance could compensate the wall reduce caused by hi-temperature expansion of the sand cure and thereby ensure the Casting wall thickness meeting design requirement.