大型零部件的复杂工艺并行设计方法的研究

Concurrent process planning for large parts with complex manufacturing processes

针对大型机械零部件的工艺要求,提出了一种基于任务驱动、面向大型零部件制造的复杂工艺并行设计方法。在分析了大型零部件制造工艺特点的基础上,采用面向对象和特征技术的哲理,按照其所涉及的工艺类型和工序复杂程度进行分类和任务划分,建立工序特征库。在实际应用时,先依据具体零件的工艺特点和所包含的工艺种类,利用工艺特征库构造面向任务管理的工艺特征模型,并以此进行任务划分和分派。就复杂的工艺方案而言,可按照工艺特征,将其分解成一系列单独的子任务。在工艺设计过程中,通过对这些子任务的管理和监控实现并行工艺设计。采用这种新的工艺设计模式,使这些含有不同类型工序(如机加工、焊接、冲压、清洗和数控等)的复杂工艺设计任务实现了统一管理,提高了工艺设计灵活性和效率。

A task-driven-based framework for concurrent process planning oriented to large parts in complicated manufacturing processes was presented. Based on analysis of large part process features and adopting principles of object-oriented as well as feature technology, tasks were classified according to process type and complicatedness, sequence feature library was set up accordingly. In practice, according to specific process feature and process type of special parts, process feature model oriented to task management was constructed by applying part feature library. And then task classification and allocation were conducted. For complicated process scheme, task could be decomposed to a series of independent subtask according to process feature. Concurrent process design process was realized by subtask management and monitoring. By using this novel process design pattern, unified management for compli-cated process design tasks was realized, design flexibility and efficiency were also improved.