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求教!怎样解决ht300平板挠曲变形

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HT300平板,3200x1600x220,如何防止挠曲变形?求各位专家指教!谢谢
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加工艺筋,是否需要反变形量,分散设置浇冒口。热处理时,讲究支撑,调整变形。
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增加铸型及砂箱刚度,分散设置内浇口,浇注后型内缓冷到室温随即装炉人工时效处理,这样会减少变形。
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变形量控制在:5以下有点把握.
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