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铁杆是一个形状较复杂而精度、强度、表面硬度都要求很严的零件。它在制造过程中遇到了很多的困难。本文就将镗杆在加工过程中每道工序所发生的困难问题都作了有系统的分析，找出了解决问题的办法，并在不断地实践中修正这些办法。虽然镗杆的制造在技术人员的努力下，已经达到了技术要求，甚至有的超过了技术要求。但文中所述及的部分做法，是不够符合经济要求的。或者说在此项工作中仍然存在著一些未得到合理解决的问题。故将本文发表，希读者进行研究讨论。
Hardcore is a complex shape and precision, strength, surface hardness are very strict parts. It encountered a lot of difficulties in the manufacturing process. This article will be boring bar in the process of processing each process problems have made a systematic analysis to find out the solution to the problem, and in practice constantly revised these methods. Although the boring bar manufacturing technicians efforts, has reached the technical requirements, and some even exceeded the technical requirements. However, some of the approaches described in the article are not sufficient for economic requirements. Or there are still some problems that have not been properly solved in this work. Therefore, this article is published, hope readers study and discussion.