JP2007313626A - High-pressure water jetting nozzle - Google Patents

High-pressure water jetting nozzle Download PDF

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JP2007313626A
JP2007313626A JP2006148851A JP2006148851A JP2007313626A JP 2007313626 A JP2007313626 A JP 2007313626A JP 2006148851 A JP2006148851 A JP 2006148851A JP 2006148851 A JP2006148851 A JP 2006148851A JP 2007313626 A JP2007313626 A JP 2007313626A
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pressure water
hole
air flow
injection
abrasive
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Ryoji Koseki
良治 小関
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Shibuya Corp
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Shibuya Kogyo Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To reduce the running cost required at replacement by introducing such a structure that the nozzle body 7 is not equipped with a mixing nozzle likely to be worn by a polishing material. <P>SOLUTION: A jet hole 10 to jet high-pressure water is formed in the nozzle body 7, and below the hole adjacent thereto, a gas stream generating hole 11 of large diameter is formed. Space 12 accommodating the polishing material leads to the gas stream generating hole 11 through a plurality of lead-in passages 12A. When the high-pressure water is jetted downward from the jet hole 10, the air is sucked from a lower opening into the gas stream generating hole 11 and rises, and by this air flow, the polishing material is sucked into the hole 11 from a supply hole 12B. Thereafter the air flow including the polishing material and rising is turned back downward by a guide 11C, which causes the polishing material to cover the periphery of the high-pressure water, and in this condition, the polishing material and the high-pressure water are jetted to the work 2 to be processed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は高圧水噴射ノズルに関し、例えばウォータジェット加工機に用いられ、噴射される高圧水に研磨材を供給するようにした高圧水噴射ノズルに関する。   The present invention relates to a high-pressure water injection nozzle, for example, a high-pressure water injection nozzle that is used in a water jet processing machine and supplies an abrasive to high-pressure water to be injected.

高圧水に研磨材を供給するようにした高圧水噴射ノズルとしては、高圧水ノズルと高圧水とアブレシブ（研磨材）を混合する混合ノズルとの間に混合室を形成して、該混合室にアブレシブ供給孔を開口させるよう構成したものが知られている（例えば、特許文献１）。
このような高圧水噴射ノズルにおいては、高圧水とアブレシブを混合する混合ノズルは、使用することによってノズル孔内部が研磨材により摩耗され、ノズル孔が徐々に拡大して切断幅が大きくなるため、切断精度を維持できる限界に達したら交換する必要がある。このような問題に対して、特許文献２による発明は、混合ノズル（ノズルチップ）の噴射方向先端面において、ノズル孔の開口部の周囲に円環状の通電部を装着し、ノズル孔の摩耗に伴って、該通電部が切断されることで、ノズル孔の摩耗の程度を自動的に検知するよう構成している。
実開昭６０−３６１５４号公報 特公平５−２４８０号公報 As a high-pressure water injection nozzle that supplies abrasive to high-pressure water, a mixing chamber is formed between the high-pressure water nozzle and a mixing nozzle that mixes high-pressure water and abrasive (abrasive), What was comprised so that an abrasive supply hole might be opened is known (for example, patent document 1).
In such a high-pressure water injection nozzle, the mixing nozzle that mixes high-pressure water and abrasive is worn by the abrasive inside the nozzle hole by use, the nozzle hole gradually expands and the cutting width increases, When reaching the limit that can maintain the cutting accuracy, it is necessary to replace it. With respect to such a problem, the invention according to Patent Document 2 attaches an annular current-carrying portion around the opening of the nozzle hole on the front end surface of the mixing nozzle (nozzle tip) in the injection direction, and wears the nozzle hole. Along with this, the current-carrying part is cut, so that the degree of wear of the nozzle hole is automatically detected.
Japanese Utility Model Publication No. 60-36154 Japanese Patent Publication No.5-2480

上述したように、高圧水に研磨材を供給するようにした高圧水噴射ノズルの従来の構成においては、高圧水と研磨材を混合する混合ノズルを備えており、該混合ノズルが研磨材により摩耗されるため交換する必要があった。また、使用期間が長くなるに従いノズル孔の孔径は徐々に拡大され、高圧水の噴射幅が拡がって加工精度に影響するという問題があった。
本発明はこのような問題に鑑みて、高圧水に研磨材を供給するようにした高圧水噴射ノズルにあって、交換を要する混合ノズルを不要とした高圧水噴射ノズルを提供することを目的としている。 As described above, the conventional configuration of the high-pressure water injection nozzle configured to supply the abrasive to the high-pressure water includes a mixing nozzle that mixes the high-pressure water and the abrasive, and the mixing nozzle is worn by the abrasive. Needed to be replaced. Further, as the service period becomes longer, the diameter of the nozzle hole is gradually increased, and the injection width of the high-pressure water is increased, which affects the processing accuracy.
In view of these problems, the present invention is a high-pressure water injection nozzle that supplies abrasives to high-pressure water and has an object to provide a high-pressure water injection nozzle that does not require a mixing nozzle that requires replacement. Yes.

上述した事情に鑑み、本発明は、噴射される高圧水に研磨材を供給するようにした高圧水噴射ノズルにおいて、
高圧水を噴射する噴射孔の前方に、噴射方向に開放される気流発生空間を形成する内壁面を備えた気流発生部を設けるとともに、該気流発生部の内壁面に気流発生空間に研磨材を供給する供給口を設け、上記噴射孔から高圧水を噴射させて上記気流発生空間を通過させることで、反噴射方向を上記内壁面に沿って流れ、上記噴射孔の周囲で折返して高圧水の周囲を噴射方向へ流れる気流を発生させ、上記内壁面に沿う気流の吸引作用により、研磨材を上記供給口から上記気流発生空間内に流出させて上記気流の推進力で送り、噴射方向へ高圧水の周囲から供給するようにしたものである。 In view of the above-described circumstances, the present invention is a high-pressure water injection nozzle configured to supply an abrasive to high-pressure water to be injected.
In front of the injection hole for injecting the high-pressure water, an air flow generation unit having an inner wall surface that forms an air flow generation space that is opened in the injection direction is provided, and an abrasive is applied to the air flow generation space on the inner wall surface of the air flow generation unit. A supply port is provided, and high-pressure water is jetted from the injection holes and allowed to pass through the air flow generation space, so that the counter-injection direction flows along the inner wall surface and turns around the injection holes to return the high-pressure water. An airflow that flows in the injection direction is generated, and by the airflow suction action along the inner wall surface, the abrasive is discharged from the supply port into the airflow generation space and sent by the propulsive force of the airflow, and high pressure is applied in the injection direction. It is supplied from the surroundings of water.

このような構成によれば、従来より備えていた高圧水と研磨材を混合する混合ノズルを不要とすることができ、交換により生じるランニングコストを削減することができる。また、高圧水の噴射幅を一定に保ち加工精度を高精度に維持することができる。   According to such a structure, the mixing nozzle which mixes the high pressure water and abrasive | polishing material which were provided conventionally can be made unnecessary, and the running cost which arises by replacement | exchange can be reduced. In addition, it is possible to keep the injection width of the high-pressure water constant and maintain the processing accuracy with high accuracy.

以下図示実施例について本発明を説明すると、図１において１はウォータジェット加工機に設けた本発明に係る高圧水噴射ノズルを示している。
該ウォータジェット加工機は、板状の被加工物２を水平に支持する加工テーブル３を備え、高圧水噴射ノズル１から高圧水を噴射させながら移動させることで、被加工物２に対して所要の切断加工を施すようになっている。本発明に係る高圧水噴射ノズル１では、噴射させる高圧水に研磨材を供給するよう構成されている。 Hereinafter, the present invention will be described with reference to the illustrated embodiment. In FIG. 1, reference numeral 1 denotes a high-pressure water jet nozzle according to the present invention provided in a water jet machine.
The water jet processing machine includes a processing table 3 that horizontally supports a plate-like workpiece 2, and is required for the workpiece 2 by being moved while jetting high-pressure water from a high-pressure water jet nozzle 1. The cutting process is performed. The high-pressure water injection nozzle 1 according to the present invention is configured to supply an abrasive to high-pressure water to be injected.

高圧水噴射ノズル１は、上部ブロック５と下部ブロック６とを一体に連結して概略円柱状に形成されたノズル本体７を備えている。
上記上部ブロック５の軸心位置には、上下方向に貫通する貫通孔を穿設してあり、この貫通孔を高圧水が通過する液通路８としており、該液通路８に給液管９を介して高圧水が供給されるようになっている。上記液通路８の下端開口に対向する下部ブロック６の軸心上部には、液通路８よりも内径を極端に縮小させて形成した噴射孔１０が開口され、この噴射孔１０よりも下方であって高圧水の噴射方向前方には、噴射孔１０よりも遥かに大径であり、噴射方向へ開放された気流発生孔１１を形成している。
このように、下部ブロック６内に形成した気流発生孔１１は、噴射孔１０に連続して下方に向けて円錐状に拡径させた円錐部１１Ａと、円錐部１１Ａの開口径よりも拡大させた円柱状孔からなる大径部１１Ｂを備えており、さらにこの大径部１１Ｂの上端部分は、上方へくぼむ断面円弧状のガイド部１１Ｃとしている。該ガイド部１１Ｃの中央に円錐部１１Ａ、ならびに噴射孔１０が開口し、該開口から高圧水が噴射され、大径部１１Ｂの中央を通過して、下部ブロック６の下端面であるノズル本体７の下面中央に開口させた気流発生孔１１の開口部から出射されるようになっている。 The high-pressure water injection nozzle 1 includes a nozzle body 7 that is formed in a substantially cylindrical shape by integrally connecting an upper block 5 and a lower block 6.
A through hole penetrating in the vertical direction is formed in the axial center position of the upper block 5, and a liquid passage 8 through which the high-pressure water passes is formed through the through hole. A liquid supply pipe 9 is provided in the liquid passage 8. High-pressure water is supplied through this. An injection hole 10 is formed in the upper portion of the axial center of the lower block 6 facing the lower end opening of the liquid passage 8. The injection hole 10 is formed with an inner diameter extremely reduced as compared with the liquid passage 8, and is lower than the injection hole 10. In front of the high-pressure water injection direction, an air flow generation hole 11 having a diameter much larger than that of the injection hole 10 and opened in the injection direction is formed.
As described above, the air flow generation hole 11 formed in the lower block 6 has a conical portion 11A having a conical diameter expanded continuously downward from the injection hole 10 and an opening diameter of the conical portion 11A. The large-diameter portion 11B made of a cylindrical hole is provided, and the upper end portion of the large-diameter portion 11B is a guide portion 11C having an arcuate cross section that is recessed upward. A conical portion 11A and an injection hole 10 are opened at the center of the guide portion 11C, and high-pressure water is injected from the opening, passes through the center of the large-diameter portion 11B, and is a nozzle body 7 that is the lower end surface of the lower block 6. The airflow is emitted from the opening of the airflow generation hole 11 opened at the center of the lower surface.

本実施例では、噴射孔１０の噴射口径を２５０μｍ、気流発生孔１１の大径部１１Ｂの長手方向の長さを２０ｍｍ、直径を５ｍｍに設定してあり、図示しない高圧ポンプから給液管９を介して５００ＭＰａの高圧水を供給するようになっている。加工を行う際は、ノズル本体７の下面と被加工物２の表面とは若干の隙間をもって対向させてあり、この状態で噴射孔１０から高圧水を噴射させて、気流発生孔１１の内部を通過させると、高圧水の周囲では下方に向けて高速に気流が生じ、気流発生孔１１の上部では負圧が発生する。そのため、下方に向けて生じた気流の外側、すなわち、気流発生孔１１の大径部１１Ｂの内壁面に沿って上昇気流が生じ、ノズル本体７下面の気流発生孔１１の開口から外気が吸引されるようになる。これによって、気流発生孔１１の内部、噴射されている高圧水の周囲の空間では、大径部１１Ｂの内壁面に沿って反噴射方向へ上昇して流れ、噴射孔１０の周囲を取り囲む円弧状のガイド部１１Ｃで内側に折り返され、高圧水の周囲を噴射方向へ下降して流れる循環気流が発生する。この循環気流の作用により、高圧水は流入する外気に覆われて拡散が防止されて直線的な液柱状に保たれ、被加工物２の表面に圧力を集中させるとともに、極細の切断幅を得ることができる。
このように、気流発生孔１１の内部、すなわち、大径部１１Ｂの内壁面および、ガイド部１１Ｃによる天面により取り囲まれた空間は、上記循環気流を発生させる気流発生空間として形成され、該気流発生孔１１を開口させることで、本発明における気流発生部が設けられている。
このように構成されたノズル本体７において、本発明においては、さらに気流発生孔１１の内部で、液柱状の高圧水に粉状の研磨剤を供給するようになっている。 In the present embodiment, the injection hole diameter of the injection hole 10 is set to 250 μm, the length in the longitudinal direction of the large diameter part 11B of the air flow generation hole 11 is set to 20 mm, and the diameter is set to 5 mm. The high-pressure water of 500 MPa is supplied through this. When processing, the lower surface of the nozzle body 7 and the surface of the workpiece 2 are opposed to each other with a slight gap. In this state, high-pressure water is injected from the injection holes 10 so that the inside of the airflow generation holes 11 is made. When it is passed, an air flow is generated at high speed around the high pressure water, and a negative pressure is generated above the air flow generation hole 11. Therefore, an upward airflow is generated outside the airflow generated downward, that is, along the inner wall surface of the large-diameter portion 11B of the airflow generation hole 11, and the outside air is sucked from the opening of the airflow generation hole 11 on the lower surface of the nozzle body 7. Become so. As a result, in the space around the high-pressure water being jetted inside the airflow generation hole 11, the gas flows upward in the anti-injection direction along the inner wall surface of the large-diameter portion 11 </ b> B and surrounds the circumference of the injection hole 10. A circulating airflow is generated that is folded inward by the guide portion 11C and flows down around the high-pressure water in the injection direction. By the action of this circulating airflow, the high-pressure water is covered with the incoming outside air and is prevented from diffusing and kept in a straight liquid column shape, concentrating the pressure on the surface of the workpiece 2 and obtaining an extremely fine cutting width. be able to.
Thus, the space surrounded by the inside of the airflow generation hole 11, that is, the inner wall surface of the large diameter portion 11B and the top surface by the guide portion 11C is formed as an airflow generation space for generating the circulating airflow. By opening the generation hole 11, the airflow generation part in the present invention is provided.
In the nozzle body 7 configured as described above, in the present invention, a powdery abrasive is supplied to the liquid columnar high-pressure water inside the airflow generation hole 11.

すなわち、下部ブロック６には、中心部に開口した気流発生孔１１の大径部１１Ｂを囲繞して研磨材を収容する環状の収容空間１２を形成してあり、該収容空間１２から気流発生孔１１の軸心に向けて複数（本実施例では１２本）の導入通路１２Ａを形成するとともに、それら各導入通路１２Ａの内方側の先端を大径部１１Ｂの内壁面に開口させ、研磨材の供給口１２Ｂを設けている。つまり、収容空間１２と大径部１１Ｂ内側とは複数の導入通路１２Ａを介して相互に連通しており、導入通路１２Ａを介して大径部１１Ｂの内壁面内側の気流発生空間に、研磨材を供給できるようになっている。各導入通路１２Ａは、上記大径部１１Ｂの円周方向等間隔位置に設けてあり、かつ大径部１１Ｂの長手方向の長さのほぼ中間より下方の範囲で、全て同一高さに配置している。
上記収容空間１２の上面には、下部ブロック６から上部ブロック５にわたって設けられ、上部ブロック５の周面に開口された供給通路１３が接続され、該供給通路１３とそれに接続した供給管１４を介して図示しない供給源から研磨材が補充されるようになっている。
該供給通路１３は環状の収容空間１２の中心を挟んだ２か所に配置され、収容空間１２内の研磨材の消費に応じて必要量の研磨材を、供給管１４を介して供給源から供給するようになっている。使用する研磨材としては、噴射される高圧水の噴射径の約１／３程度の粒径をしたパウダー状のものが選定され、かなり微細となることから、湿気により収容空間１２内で固まることを防止するため、ドライエアにより供給管１４内を給送させている。なお、固まりを防止する手段としては、ノズル本体７にヒータを内蔵して乾燥させるようにしても良い。 That is, the lower block 6 is formed with an annular housing space 12 that encloses the large-diameter portion 11B of the airflow generating hole 11 that opens at the center portion and accommodates the abrasive. A plurality of (12 in this embodiment) introduction passages 12A are formed toward the axis of 11 and the inner ends of the introduction passages 12A are opened on the inner wall surface of the large-diameter portion 11B. The supply port 12B is provided. That is, the accommodating space 12 and the inside of the large diameter portion 11B are in communication with each other via a plurality of introduction passages 12A, and the abrasive material is introduced into the airflow generation space inside the inner wall surface of the large diameter portion 11B via the introduction passage 12A. Can be supplied. The introduction passages 12A are provided at equal intervals in the circumferential direction of the large-diameter portion 11B, and are all arranged at the same height in a range below the middle of the length in the longitudinal direction of the large-diameter portion 11B. ing.
A supply passage 13 provided from the lower block 6 to the upper block 5 and opened to the peripheral surface of the upper block 5 is connected to the upper surface of the housing space 12, and the supply passage 13 and a supply pipe 14 connected thereto are connected. Thus, the abrasive is replenished from a supply source (not shown).
The supply passages 13 are arranged at two locations across the center of the annular storage space 12, and a necessary amount of abrasive is supplied from the supply source via the supply pipe 14 according to consumption of the abrasive in the storage space 12. It comes to supply. As the abrasive to be used, a powder-like one having a particle diameter of about 1/3 of the injection diameter of the high-pressure water to be injected is selected and becomes quite fine, so that it hardens in the accommodation space 12 due to moisture. In order to prevent this, the supply pipe 14 is fed by dry air. In addition, as a means for preventing clotting, a heater may be built in the nozzle body 7 and dried.

以上のように、気流発生孔１１の大径部１１Ｂの内壁面に研磨材の供給口１２Ｂを開口させた本実施例にあっては、噴射孔１０から高圧水が噴射されると、気流発生孔１１内で発生する負圧により生じる大径部１１Ｂの内壁面に沿った上昇気流の吸引作用によって、供給口１２Ｂから研磨材が吸引されて気流発生空間内に流出し、大径部１１Ｂの内壁面に沿って上昇する空気流による推進力で上方へ送られ、さらに円弧状のガイド部１１Ｃによって内側に向けて折り返されて、噴射された高圧水の周囲を噴射方向へ送られる。
そして、このように研磨材が高圧水の周囲から高圧水を覆うように供給されると、即座に研磨材は液柱状とした高圧水の表面張力により、その表面に吸着されて高圧水とともに運ばれて被加工物２に高速で衝突される。被加工物２は、高圧水の水圧とその外周部での研磨材の衝撃により切削され切断される。
なお、本実施例においては、噴射孔１０の口径を２５０μｍとしたが、上記循環気流を発生させることのできる範囲で選定することができ、５０〜５００μｍの範囲で選定することが望ましい。また、気流発生孔１１の大径部１１Ｂの長手方向の長さを２０ｍｍ、直径を５ｍｍに設定したが、気流発生孔１１の長手方向の長さについては６〜３０ｍｍの範囲で、また、直径については２〜１０ｍｍの範囲で選定することが可能である。ただし、長手方向の長さ（ａ）と直径（ｂ）の比率（アスペクト比：ａ／ｂ）が２〜１０の範囲となるように選定するようにする。 As described above, in this embodiment in which the abrasive supply port 12B is opened on the inner wall surface of the large-diameter portion 11B of the airflow generation hole 11, when high-pressure water is injected from the injection hole 10, the airflow is generated. Due to the suction action of the rising air flow along the inner wall surface of the large diameter portion 11B generated by the negative pressure generated in the hole 11, the abrasive is sucked from the supply port 12B and flows out into the air flow generation space, and the large diameter portion 11B It is sent upward by a propulsive force generated by the air flow rising along the inner wall surface, and further folded inward by the arcuate guide portion 11C to be sent around the jetted high-pressure water in the jetting direction.
When the abrasive is supplied so as to cover the high-pressure water from around the high-pressure water in this way, the abrasive is immediately adsorbed on the surface by the surface tension of the high-pressure water in the form of liquid column and is transported together with the high-pressure water. As a result, it collides with the workpiece 2 at high speed. The workpiece 2 is cut and cut by the water pressure of the high-pressure water and the impact of the abrasive on the outer periphery thereof.
In the present embodiment, the diameter of the injection hole 10 is 250 μm, but it can be selected within a range where the circulating air flow can be generated, and is preferably selected within a range of 50 to 500 μm. Moreover, although the length of the longitudinal direction of the large diameter part 11B of the airflow generation hole 11 was set to 20 mm and the diameter was set to 5 mm, the length of the longitudinal direction of the airflow generation hole 11 is in the range of 6 to 30 mm, and the diameter Can be selected in the range of 2 to 10 mm. However, the ratio (aspect ratio: a / b) of the length (a) and the diameter (b) in the longitudinal direction is selected in the range of 2 to 10.

本発明の一実施例を示す断面図。Sectional drawing which shows one Example of this invention.

符号の説明Explanation of symbols

１…高圧水噴射ノズル １０…噴射孔
１１…気流発生孔（気流発生部） １２Ｂ…供給口 DESCRIPTION OF SYMBOLS 1 ... High pressure water injection nozzle 10 ... Injection hole 11 ... Airflow generation hole (airflow generation part) 12B ... Supply port

Claims (1)

噴射される高圧水に研磨材を供給するようにした高圧水噴射ノズルにおいて、
高圧水を噴射する噴射孔の前方に、噴射方向に開放される気流発生空間を形成する内壁面を備えた気流発生部を設けるとともに、
該気流発生部の内壁面に気流発生空間に研磨材を供給する供給口を設け、
上記噴射孔から高圧水を噴射させて上記気流発生空間を通過させることで、反噴射方向を上記内壁面に沿って流れ、上記噴射孔の周囲で折返して高圧水の周囲を噴射方向へ流れる気流を発生させ、上記内壁面に沿う気流の吸引作用により、研磨材を上記供給口から上記気流発生空間内に流出させて上記気流の推進力で送り、噴射方向へ高圧水の周囲から供給することを特徴とする高圧水噴射ノズル。 In the high-pressure water injection nozzle that supplies the abrasive to the high-pressure water to be injected,
In front of the injection hole for injecting the high-pressure water, an air flow generation unit provided with an inner wall surface forming an air flow generation space opened in the injection direction is provided,
A supply port for supplying an abrasive to the air flow generation space is provided on the inner wall surface of the air flow generation unit,
By injecting high-pressure water from the injection holes and passing through the airflow generation space, the airflow flows in the anti-injection direction along the inner wall surface and turns around the injection holes and flows around the high-pressure water in the injection direction. The abrasive is caused to flow out from the supply port into the air flow generation space through the suction action of the air flow along the inner wall surface, sent by the propelling force of the air flow, and supplied from around the high-pressure water in the injection direction. High pressure water injection nozzle characterized by
JP2006148851A 2006-05-29 2006-05-29 High-pressure water jetting nozzle Pending JP2007313626A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101233756B1 (en) * 2011-01-06 2013-02-15 부산대학교 산학협력단 Cutting Apparatus of Abrasive Water Jet Type
JP2013215854A (en) * 2012-04-10 2013-10-24 Sugino Machine Ltd Abrasive water jet nozzle, and abrasive water jet machine

Citations (6)

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JPS63251199A (en) * 1987-04-03 1988-10-18 株式会社　タムラ製作所 High-pressure liquid injection working device
JPH01159173A (en) * 1987-12-15 1989-06-22 Fuji Heavy Ind Ltd Working method for composite member
WO1992019384A1 (en) * 1991-04-24 1992-11-12 Ingersoll-Rand Company Reverse flow limiter for fluid jet nozzle
US5679062A (en) * 1995-05-05 1997-10-21 Ford Motor Company CO2 cleaning nozzle and method with enhanced mixing zones
US20030109206A1 (en) * 2001-12-06 2003-06-12 The Johns Hopkins University Porous, lubricated mixing tube for abrasive, fluid jet
US20030132325A1 (en) * 2001-05-25 2003-07-17 Maxtec, Inc. Self-aligning, spring-disk waterjet assembly

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63251199A (en) * 1987-04-03 1988-10-18 株式会社　タムラ製作所 High-pressure liquid injection working device
JPH01159173A (en) * 1987-12-15 1989-06-22 Fuji Heavy Ind Ltd Working method for composite member
WO1992019384A1 (en) * 1991-04-24 1992-11-12 Ingersoll-Rand Company Reverse flow limiter for fluid jet nozzle
US5679062A (en) * 1995-05-05 1997-10-21 Ford Motor Company CO2 cleaning nozzle and method with enhanced mixing zones
US20030132325A1 (en) * 2001-05-25 2003-07-17 Maxtec, Inc. Self-aligning, spring-disk waterjet assembly
US20030109206A1 (en) * 2001-12-06 2003-06-12 The Johns Hopkins University Porous, lubricated mixing tube for abrasive, fluid jet

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101233756B1 (en) * 2011-01-06 2013-02-15 부산대학교 산학협력단 Cutting Apparatus of Abrasive Water Jet Type
JP2013215854A (en) * 2012-04-10 2013-10-24 Sugino Machine Ltd Abrasive water jet nozzle, and abrasive water jet machine

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