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首页> 外文期刊>International Journal of Mechanical Engineering Education >Analysis and structuring of process planning logic for CNC machining: An education and training perspective
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Analysis and structuring of process planning logic for CNC machining: An education and training perspective

机译：数控加工过程计划逻辑的分析和构建：教育和培训的观点

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摘要

Programming of computer numerical control (CNC) machining centres using computer aided manufacturing (CAM) software is efficient provided that machining operations and their sequence has been correctly determined by the user. Such decisions, however, are a largely matter of experience. If the user is inexperienced, then Computer Aided Process Planning systems may be employed, but these are usually legacy systems. Thus, normally some prior knowledge has to be induced to the inexperienced user in the form of structured knowledge or rules. After studying a representative number of parts, creating and validating process plans and feeding them to a CAM system some baseline knowledge has been created and structured into rules. Training the user towards applying these rules, or even creation of custom rules is based on part analysis according to a basic reasoning. This is best implemented by advance-organisers of the schematic type regarding part form, process identification, work-holding and setup sequencing, whilst creation of steps or instructions for guiding the process plan generation flow is effected according to the Structure of the Observed Learning Outcome paradigm. The method has been applied to a sizeable audience and preliminary statistical and qualitative evidence on its effectiveness is presented.
机译：只要用户正确确定了加工操作及其顺序，就可以使用计算机辅助制造（CAM）软件对计算机数控（CNC）加工中心进行编程。但是，这样的决定很大程度上取决于经验。如果用户没有经验，则可以使用计算机辅助过程计划系统，但是这些通常是遗留系统。因此，通常必须以结构化知识或规则的形式将一些先验知识引入经验不足的用户。在研究了具有代表性的零件之后，创建并验证了工艺计划并将其提供给CAM系统，已经创建了一些基础知识并将其构造为规则。训练用户应用这些规则，甚至创建自定义规则都是基于根据基本推理进行的零件分析。最好由原理图类型的预先组织者在零件形式，过程标识，工作负责和设置顺序方面进行实施，同时根据所观察到的学习成果的结构来创建步骤或指令以指导过程计划生成流程范例。该方法已应用于大量听众，并提供了有关其有效性的初步统计和定性证据。

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