测试罐时球控制

诚信可以是球队的哥伦布，哦，植物的首要任务。为了确保其三件套钢罐不会泄漏，可尊贵的集装箱制造商在两个独立的CAN线上使用泄漏测试机上的新控制器。在95年代中期，球从Hyde Park Electronics（Dayton，OH）的原型MD20（Memory Display）泄漏测试仪控制器到Alcoa的一个部门（Randolph，NY）的48站气压测试仪包装机械。从那时起，另一个MD20已被添加到第二行。对于其传感器更广泛认可，海德公园已生产了几年的控制器。MD20推进了早期海德公园控制器的控制技术，例如由MD20在两个球线上所取代的MD3。“我们同意在空气压力测试仪承运人轮上添加原型，看看它是如何运作的，”弗兰兹·塔格拉姆，球的哥伦布植物维修技工召回。“此MD20更电脑化，并让我们更加控制我们的测试过程。它有一个控制面板和显示终端，指示我们称之为的48站或”口袋“中的每个状态。”基于微处理器的集成MD20结合了先前需要不同控制器的三个单独功能：无可以/无空气控制器，压力传感器放大器和存储器显示。 The advantages of these functions become evident during the can testing process. Once the manufacturers end is seamed to the welded can body, the cans proceed single-file at speeds of around 600 cans/min. Cans twist through an overhead conveyor, then reach a starwheel and infeed worm that transfers each can into one of 48 pockets on the revolving Randolph air tester. The open end of the can is positioned tightly against a rubber boot. This essentially "seals" the can to the boot. The pocket goes over the can and is also affixed to the rubber. The no can/no air controller detects the presence of a can within each pocket. Once the can is detected, between 5 and 10 psi of air is injected through a vent into the open can end--not into the outer pocket, which remains at atmospheric pressure. Without the no can/no air controller, air could be released into the pocket. That could potentially damage the unit. A leaking can would allow air to escape into the outer pocket where a transducer would then detect an increase in air pressure. In turn, the transducer produces an electrical spike. The larger the leak, the stronger the spike. This spike is transferred through a cable to the pressure sensor amplifier. The memory system stores this signal until the wheel has revolved to the point where the leaking can is discharged via a diverter and into a box adjacent to the line. By combining these three key functions into the MD20, the need for spare parts for separate controllers is greatly reduced. Another MD20 advantage compared with the MD3 is that the MD20 creates a set of numerical values that indicate good or defective cans. For example, a reading within a pocket higher than the targeted "good" range would indicate a leaker, while an unusually low air pressure reading could indicate an air supply problem. The MD3 would simply reject a can without giving the operator a clue as to the problem's origin. The MD20 also provides a handy display that allows operators to acquire key information such as total number of cans tested/rejected, rejects per pocket, and pressure readings within each pocket. "The MD20 gives us more control over the critical points of our can testing process," says Tummel. "For example, we can adjust how quickly our rejectors fire, and we can identify problem pockets that may be worn down. This helps us cut down on troubleshooting time. "Most importantly, we can quickly determine leaks. We can monitor the operation while the line runs 24 hours a day, seven days a week." Ball's satisfaction with the controller is best demonstrated by its plans to add a third MD20 in the near future at the Columbus plant.