机械工程专业英语课件ppt课件.ppt

Most manufacturing engineers would agree that, if ten different planners were asked to develop a process plan for the same part, they would probably come up with ten different plans. Obviously, all these plans cannot reflect the most efficient manufacturing methods, and, in fact, there is no guarantee that any one of them will constitute the optimum method for manufacturing the part.  大部分制造工程师都会同意这个看法，即如果10个不同的工艺人员进行同一个零件的工艺设计，他们很可能得出10种不同的方案。显然，并不是所有这些方案都不能反映最适当的制造方法，而且，事实上也不能保证它们中的任何一个方案 是由加工这个零件的最好的方法组成的。 《机械工程专业英语教程》 * * What may be even more disturbing is that a process plan developed for a part during a current manufacturing program may be quite different from the plan developed for the same or similar part during a previous manufacturing program and it may never be used again for the same or similar part. 在目前的制造过程中的一个更为混乱的事情是，对于一个零件来说，现在所编制的工艺规程可能与以前在制造过程中所编制的同一个零件或者相似零件的工艺规程相差很多，而且这个工艺规程可能再也不会应用于同一个零件或者相似零件。 That represents a lot of wasted effort and produces a great many inconsistencies in routing, tooling, labor requirements, costing, and possibly even purchase requirements. 这说明很多工作都被浪费了，而且在工艺路线、工艺装备、对工人的要求和成本等方面都不一致，甚至对外购件的要求都不一样。 * * 《机械工程专业英语教程》 Of course, process plans should not necessarily remain static. As lot sizes change and new technology, equipment, and processes become available, the most effective way to manufacture a particular part also changes, and those changes should be reflected in current process plans released to the shop. 当然工艺设计不应该是一成不变的。随着产品批量的变化和新技术、新设备、新的加工方法的出现，加工制造某个特定零件最适当的方法也会发生变化，而且这些变化应该在车间目前使用的加工工艺规程中反映出来。 * * 《机械工程专业英语教程》 A planner must manage and retrieve a great deal of data and many documents, including established standards, machinability data, machine specifications, tooling inventories, stock availability, and existing process plans. This is primarily an information-handling job, and the computer is an ideal companion.  工艺人员应该管理和检索大量的数据和很多文件，其中包括：已经建立了的标准、可加工性数据、机器的规格、工艺装备的清单、原材料库存量和一些目前正在应用的工艺文件。这主要是一些信息处理工作，而计算