| 摘要 |
PROBLEM TO BE SOLVED: To provide a water jet machining device capable of smoothly delivering abrasive grains without being retained in a pipe when delivering deposited abrasive grains from an abrasive grain recovery tank to a high pressure tank. SOLUTION: A recovery means 30 is attached to the abrasive recovery tank 18. The recovery means 30 includes an abrasive grain suction passage 32 for sucking the abrasive grains A deposited in a lower layer part of the abrasive grain recovery tank 18, a liquid suction passage 34 for sucking supernatant liquid B existing in an upper layer part of the abrasive grain recovery tank 18, a mixing chamber 36 for mixing the abrasive grains A sucked through the abrasive grain suction passage 32 and the supernatant liquid B sucked through the liquid suction passage 34, and a delivery passage 38 for delivering the abrasive grains A and the supernatant liquid B in the mixing chamber 36 from the mixing chamber 36. In the delivery passage 38, a pump means 48 is disposed. By a suction action of the pump means 48, mixed liquid of the abrasive grains A and the supernatant liquid B is delivered. COPYRIGHT: (C)2011,JPO&INPIT
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