Impact assessment
These two robots are the first technical experience experienced by Sequoia Automation. The company knows that this is just the beginning of a robotic application, and there are many things to learn in the years to come. In the process, they have made many improvements to the robot, including the following points:
Greatly improve the normal running time of the machine. The company's two state-of-the-art dual-tray machining centers have become less and less likely to stop due to loading and unloading of workpieces after robot loading and unloading of workpieces. The robot never creates any obstacles to the machining center. In addition to the brief pauses during pallet exchange, the tool is always in the process of cutting (of course it takes a little time to change the tool, but it is very short, relatively negligible.)
Mr. Burke admits: “Using a two-tray machining center generally saves more uptime compared to a machine with a common workbench, even when the operator manually loads and unloads the workpiece. However, some chores often It distracts the operator, such as finding gauges, cutting tools to find replacement tools, short breaks during lunch, etc., so that the machine is often idle. The machine's uptime is rarely more than 75%. On the other hand, the robot can work there, can install new blanks and remove the already machined parts without stopping, which can increase the machine's uptime to 95%. According to estimates, manual handling Machine uptime can be increased by 20% compared to machine tools."
Increased production efficiency. After the new vertical machining center with robot service, in addition to the normal improvement of the running time, the production efficiency of Sequoia Automation has also begun to improve greatly. According to historical practice, each machine in the workshop is equipped with an operator. In order to cut the cost of labor, the company found a way for operators to manage two machines.
When the latest machine tools for robotics were installed in the shop, they found that one operator could serve two machines, while also taking care of the two-tray vertical machining center that required manual loading and unloading of the workpiece. This is mainly because there are enough blanks stored in the robotic library, so the vertical machining center can work for 4 hours without being taken care of. In order to explore the way in which the robot can feed the vertical machining center for a long time, the workshop began to pilot two shifts in the two vertical machining centers operated by the robot. Among the two shifts, 4 hours were unmanned. operation. This arrangement requires only two shifts of operator, but can do the equivalent of three shifts of production.
According to some skilled operators in the workshop, they can look up to up to six vertical machining centers that are serviced by robots. This is not the case with night shifts, as only the two-tray vertical machining center uses robots to load and unload workpieces, while most of Sequoia Automation's vertical machining centers use ordinary workbenches. Of course, over time, the shop can gradually add more robots and dual-tray vertical machining centers to achieve the level of automation required and maintain its competitive position.
Increased production stability. Cheryl Schraut of Sequoia Automation said: "The advantage of using robots is that once the application is handy, you can do the same thing at any time. When you remove the changes in the process, you can improve your performance. When we apply the robot to the new When the machine tool is installed, its work efficiency index can be increased from 1.3 to 1.9, which is indeed an amazing improvement. The higher the index, the better the process performance."
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