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本文系沈阳第三机床厂在箱体孔加工工作中认真的学习了各有关的先进资料；并通过了实践摸索到的一些很宝贵经验。文中详细地有重点地阐述了：设备的选择；加工程序；镗模的设计及使用；镗模的制造。其中突出地说明了，使用设备的经济性和降低加工过程中辅助时间的办法，以及精镗时采用铰刀的新成就等问题。从全文来看该厂在此项工作上有了许多很好的经验。特将全文发表於下，供各厂学习参考。
In this paper, the third machine tool factory in Shenyang in the box hole processing work carefully studied the relevant advanced information; and adopted some practical experience groping some very valuable experience. In the paper, it elaborates in detail: the choice of equipment, the machining program, the design and use of boring mold, the manufacture of boring mold. Among others, highlighted issues such as the economics of using the equipment and ways to reduce auxiliary time during processing, as well as new achievements in using reamers for fine boring. From the whole point of view the plant has a lot of good experience in this work. The full text will be published in the next, for the factory learning reference.