A process capability study is performed for the turning process on a general purpose center lathe in order to verify the process performance and machine ability to perform within specified tolerance limit. The process...A process capability study is performed for the turning process on a general purpose center lathe in order to verify the process performance and machine ability to perform within specified tolerance limit. The process and machine capability indices were measured to determine the process and machine adequacy for industrial application. The tolerance limits were obtained from the given nominal size of the shaft, using the basic hole system and 90 sample shafts were turned on the lathe machine to specification for varying spindle speed and feed rate of the lathe. Three (3) samples were randomly selected for the turning process of a combination of the spindle speed and feed rate as a subgroup size for a total subgroup of thirty (30). The diameters (representing the quality characteristics) were used to generate control charts and capability histogram for the process. The process is within statistical control but found incapable of meeting up to specification because the capability index (C<sub>p</sub>) measured was less than 1 and the machine capability for industrial application is not adequate.展开更多
为实现集装箱码头的自动化运转,运用Visual Basic 6.0软件开发平台,设计自动化集装箱码头实时监控系统.该系统通过工业以太网,结合开放式过程控制(OLE for Process Control,OPC)技术,实现上位机与S7-300 PLC的实时通信.经过集装箱码头...为实现集装箱码头的自动化运转,运用Visual Basic 6.0软件开发平台,设计自动化集装箱码头实时监控系统.该系统通过工业以太网,结合开放式过程控制(OLE for Process Control,OPC)技术,实现上位机与S7-300 PLC的实时通信.经过集装箱码头装卸系统仿真模型实际运行验证,该实时监控系统达到设计目标,且具有稳定性和可靠性.展开更多
文摘A process capability study is performed for the turning process on a general purpose center lathe in order to verify the process performance and machine ability to perform within specified tolerance limit. The process and machine capability indices were measured to determine the process and machine adequacy for industrial application. The tolerance limits were obtained from the given nominal size of the shaft, using the basic hole system and 90 sample shafts were turned on the lathe machine to specification for varying spindle speed and feed rate of the lathe. Three (3) samples were randomly selected for the turning process of a combination of the spindle speed and feed rate as a subgroup size for a total subgroup of thirty (30). The diameters (representing the quality characteristics) were used to generate control charts and capability histogram for the process. The process is within statistical control but found incapable of meeting up to specification because the capability index (C<sub>p</sub>) measured was less than 1 and the machine capability for industrial application is not adequate.
文摘为实现集装箱码头的自动化运转,运用Visual Basic 6.0软件开发平台,设计自动化集装箱码头实时监控系统.该系统通过工业以太网,结合开放式过程控制(OLE for Process Control,OPC)技术,实现上位机与S7-300 PLC的实时通信.经过集装箱码头装卸系统仿真模型实际运行验证,该实时监控系统达到设计目标,且具有稳定性和可靠性.
