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M1132K卧轴矩台式平面磨床大阀体,铸件尺寸为200×132×90,内部需加工出大小纵横44个孔,主要孔光洁度为10,部分孔有螺纹。以前单件铸造时,大部分铸件内部缩松,加工后光洁度达不到要求,经试验有漏油、渗油,废品率高达60％以上。采用连铸立浇工艺(如图示),每根三个铸件,铸成后锯开。630以上为压力头,利用其重力作用收到良好的补缩效果。若在浇注后20秒钟从压力头顶部冲入高温铁水,并在铸件两个较大平面上放冷铁,以保证压力头后于铸件凝固,则补缩效果更好。
M1132K horizontal axis moment table grinder large body, the casting size of 200 × 132 × 90, the internal size of 44 holes to be machined size, the main hole finish 10, some holes with threads. Before casting a single piece, most of the casting internal shrinkage, processing finish less than required, after the test of oil leakage, oil leakage, rejection rate as high as 60%. Using continuous casting pouring process (as shown), each three castings, after casting sawing. 630 above the pressure head, the use of its gravity to receive a good complement effect. If 20 seconds after the pouring from the top of the pressure into the high-temperature hot metal, and cast two larger planes on the cold iron to ensure that the pressure head after the solidification of the casting, the shrinking effect is better.