Abrasive Waterjet Technology PowerUpAd-ManEng913_layout 8/8/13 3:30 PM Page 1


In the last few years, some key advancements in downsiz- ing abrasive waterjet technology have been developed by Pe- ter Liu, senior scientist, OMAX Corp. (Kent, WA), whose work under a National Science Foundation (NSF) Small Business Innovation Research (SBIR) grant culminated in August with OMAX’s release of its new MicroMax JetMachining Center. This machine is primarily aimed at cutting very thin metals used in medical, aerospace and other industries. It features a high-precision 0.1-µm linear optical encoder system, a highly rigid structure, and patent-pending processes for feeding fine abrasive at a constant flow rate. OMAX’s 7/15 Mini MaxJet5i nozzles reach position repeatability of better than ±0.0001" (±2.5 µm) and positioning accuracy of ±0.0006" (±15 µm). While OMAX isn’t the first company with micro abrasive wa- terjet systems, it may be refining the technology to another level. Other abrasive waterjet micromachining systems on the market in recent years include systems from Finepart Sweden AB (Bol- lebygd, Sweden) and Micro Waterjet LLC (Huntersville, NC).


Micro Waterjets Gaining Wider Acceptance Among the barriers to wider use of micro waterjets is changing the mindset of some machine shop owners. “The main obstacle may be in the mindset of precision workshop owners that have recently tried state-of-the-art standard water- jet systems,” said Christian Öjmertz, CEO of Finepart Sweden, developer of the Finecut micro waterjet machining systems introduced in 2009. “The fact that the level of tolerance of the waterjet process now can be 10 times higher than what was available only a few years ago can be difficult to digest. “To be able to obtain fine tolerances with micro abrasive waterjets you need to keep process parameters very stable,” Öjmertz said. “Water pressure variations should be kept at a minimum and abrasives are precision-fed [only 20–30 g/min is used for a 200–300-µm nozzle size]. Abrasive media must be of very fine quality, and we test abrasive for approval to use in the Finecut process. The abrasive media should be free from fine dust as it binds moisture that can obstruct the flow.”


Eriez’ SafeHold®


Lift Magnets


Eriez’ offers the widest selection of compact permanent lift magnets. SafeHold®


is available in four different styles to meet


any price or performance requirement with capacities up to 10,000 lbs. Call 888-300-3743or visit www.eriez.com


See us at FABTECH Booth #S3526 60 ManufacturingEngineeringMedia.com | November 2013


SafeHold Selection Guide!


NEW


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60  |  Page 61  |  Page 62  |  Page 63  |  Page 64  |  Page 65  |  Page 66  |  Page 67  |  Page 68  |  Page 69  |  Page 70  |  Page 71  |  Page 72  |  Page 73  |  Page 74  |  Page 75  |  Page 76  |  Page 77  |  Page 78  |  Page 79  |  Page 80  |  Page 81  |  Page 82  |  Page 83  |  Page 84  |  Page 85  |  Page 86  |  Page 87  |  Page 88  |  Page 89  |  Page 90  |  Page 91  |  Page 92  |  Page 93  |  Page 94  |  Page 95  |  Page 96  |  Page 97  |  Page 98  |  Page 99  |  Page 100  |  Page 101  |  Page 102  |  Page 103  |  Page 104  |  Page 105  |  Page 106  |  Page 107  |  Page 108  |  Page 109  |  Page 110  |  Page 111  |  Page 112  |  Page 113  |  Page 114  |  Page 115  |  Page 116  |  Page 117  |  Page 118  |  Page 119  |  Page 120  |  Page 121  |  Page 122  |  Page 123  |  Page 124  |  Page 125  |  Page 126  |  Page 127  |  Page 128  |  Page 129  |  Page 130  |  Page 131  |  Page 132  |  Page 133  |  Page 134  |  Page 135  |  Page 136  |  Page 137  |  Page 138  |  Page 139  |  Page 140  |  Page 141  |  Page 142  |  Page 143  |  Page 144  |  Page 145  |  Page 146  |  Page 147  |  Page 148  |  Page 149  |  Page 150  |  Page 151  |  Page 152  |  Page 153  |  Page 154  |  Page 155  |  Page 156  |  Page 157  |  Page 158  |  Page 159  |  Page 160  |  Page 161  |  Page 162  |  Page 163  |  Page 164  |  Page 165  |  Page 166  |  Page 167  |  Page 168  |  Page 169  |  Page 170  |  Page 171  |  Page 172  |  Page 173  |  Page 174  |  Page 175  |  Page 176  |  Page 177  |  Page 178  |  Page 179  |  Page 180  |  Page 181  |  Page 182  |  Page 183  |  Page 184  |  Page 185  |  Page 186  |  Page 187  |  Page 188  |  Page 189  |  Page 190  |  Page 191  |  Page 192  |  Page 193  |  Page 194  |  Page 195  |  Page 196  |  Page 197  |  Page 198  |  Page 199  |  Page 200  |  Page 201  |  Page 202  |  Page 203  |  Page 204  |  Page 205  |  Page 206  |  Page 207  |  Page 208  |  Page 209  |  Page 210  |  Page 211  |  Page 212