【摘要】 对所研究的熔模型薄壁特征件真空吸铸工艺过程中的浇注系统及排气系统进行了设计,并利用数值模拟软件对薄壁件的充型过程和可能产生的铸造缺陷进行了仿真模拟。结果表明:真空吸铸成形方法能够较好地解决浇注该铸件时易遇到的充型困难、喷溅及憋气等技术难题,可获得轮廓完整、内外品质优良的合格精铸件;立式单通道浇注方案优于卧式双通道浇注方案,使合金液流充型过程平缓顺畅,能够避免金属液出现汇流和冲击现象,减少铸造缺陷的产生。更多还原

【Abstract】 In this study, the pouring system and exhaust system in the process of vacuum suction casting for the thin-wall feature parts of the investment mold were designed, and the filling process and possible casting defects were simulated by the numerical simulation software. The results show that the vacuum suction casting method can better solve some technical problems in the casting process such as filling difficulties, splashing and air holding, and can obtain qualified castings with complete contours and excellent surface quality; the vertical single-channel casting scheme is better than the horizontal double-channel casting scheme, and the filling process of the alloy liquid flow is smooth, which can avoid effectively the confluence and impact of liquid metal, thereby reducing the occurrence of casting defects.更多还原