本文针对近期生产的选矿厂大端盖，在粗车加工时发现的裂纹缺陷进行分析，查找原因，制定预防措施，保证了后期制作此类铸件的质量。
The paper presents reasons and preventing measures for crack of big blank cap happened in roughing tool, which can give some reference for such machine production in future.
本文针对近期生产的选矿厂大端盖，在粗车加工时发现的裂纹缺陷进行分析，查找原因，制定预防措施，保证了后期制作此类铸件的质量。
The paper presents reasons and preventing measures for crack of big blank cap happened in roughing tool, which can give some reference for such machine production in future.
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