This depth can be held to an accuracy of ☐.002 inch.Īchieving this kind of speed inevitably involves some sort of rotary motion. The depth is determined by the number of passes the workpiece makes under the jet. Where the mask has a hole in some given shape, the waterjet mills a pocket to that same shape in the workpiece beneath it. The mask lays over the workpiece like a stencil, allowing the waterjet to mill only certain regions. Then, completing the milling process is a piece of hard tooling-a mask. This generally means mounting the workpiece on some spinning surface while the nozzle moves in a straight line. Milling with waterjet involves moving the workpiece past the nozzle so fast, the amount of material removed can be precisely controlled. The difference would be in the way the machine moves. Such a machine would use the same nozzle, jet and garnet abrasive as a conventional abrasive waterjet machine. But if the company finds high demand for this process in any particular metalworking segment, then a standard waterjet milling machine designed around the needs of that group will soon follow. "At this point, any waterjet milling system would be a custom build," he says. Mohamed Hashish is the researcher who has led the development of waterjet milling at Flow.
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