Sequencing in Flexible Assembly Systems with Blocking

具有封闭功能的灵活装配系统中的测序

• 批准号: 8614659
• 负责人: Michael Pinedo
• 金额: $ 27.01万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-07-01 至 1991-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8614659&HistoricalAwards=false
• 关键词: Sequencing; Flexible; Assembly; Systems; Blocking

An important production line configuration used in flexible manufacturing systems consists of several assembly stations in series. Usually, each product type flows through these stations in the same order. Each type, however, may have different processing times. Some advanced lines have the ability to skip stations when the jobs require no processing at them. Also, a job can be kept from being processed on a machine if the preceding job is still being worked upon. This is commonly known as "blocking" and is a subject of prime interest for contemporary, just-in-time manufacturing strategies. If too much time is spent in blocking, total line throughput will be severely degraded. The old approach to ease blocking has been to place buffers between assembly stations to absorb differences in processing times. However, modern manufacturing methods place high priority on reducing work-in process inventory. Thus, finding an optimal order in which to process the different product types becomes critical for maximizing line throughput.

柔性制造系统中使用的重要生产线配置由多个串联的装配站组成。 通常，每种产品类型都以相同的顺序流经这些站点。 然而，每种类型可能有不同的处理时间。 当作业不需要在工作站进行处理时，一些先进的生产线能够跳过工作站。 此外，如果前一个作业仍在处理，则可以阻止机器处理该作业。 这通常称为“阻塞”，是当代即时制造策略最感兴趣的主题。 如果阻塞时间过多，总线路吞吐量将严重下降。 缓解阻塞的旧方法是在装配站之间放置缓冲区，以吸收处理时间的差异。 然而，现代制造方法高度重视减少在制品库存。 因此，找到处理不同产品类型的最佳顺序对于最大化生产线吞吐量至关重要。