EP0597057B1 - Tete d'usinage d'une machine de decoupage au jet d'eau et dispositif de visee destine a equiper une telle tete - Google Patents

Tete d'usinage d'une machine de decoupage au jet d'eau et dispositif de visee destine a equiper une telle tete Download PDF

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Publication number
EP0597057B1
EP0597057B1 EP93909747A EP93909747A EP0597057B1 EP 0597057 B1 EP0597057 B1 EP 0597057B1 EP 93909747 A EP93909747 A EP 93909747A EP 93909747 A EP93909747 A EP 93909747A EP 0597057 B1 EP0597057 B1 EP 0597057B1
Authority
EP
European Patent Office
Prior art keywords
pipe
casing
cutting
nozzle
machining head
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP93909747A
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German (de)
English (en)
French (fr)
Other versions
EP0597057A1 (fr
Inventor
Charles Ernest Schumacher
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0597057A1 publication Critical patent/EP0597057A1/fr
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Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C5/00—Devices or accessories for generating abrasive blasts
    • B24C5/02—Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials
    • B24C5/04—Nozzles therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/04—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/364—By fluid blast and/or suction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/929—Tool or tool with support
    • Y10T83/9457—Joint or connection
    • Y10T83/9488—Adjustable
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/97—Miscellaneous

Definitions

  • the present invention relates to a machining head known as THp (very high pressure, i.e. around 4000 bars) a water jet cutting machine intended for high precision machining. More specifically, this The invention relates to a machining head comprising adjustment means making it possible to adjust, so systematic and repetitive, the direction of the water jet inside this head.
  • THp very high pressure, i.e. around 4000 bars
  • the invention relates to an aiming device intended to equip a head comprising the means mentioned above.
  • Machining heads intended to equip machines water jet cutting typically have a housing or frame which is intended to be fixedly mounted on a "XY" orientation table or on an articulated robot, mounted on a cart.
  • a acceleration nozzle which is integral with the housing and which is connected, by appropriate piping, to a source supplying water possibly with additives, at very high pressures.
  • the function of the accelerator nozzle is to bring water that it receives means of admission, at a very speed high, especially supersonic, to form a water jet "coherent" capable of perforating, neatly and with precision, any material of a workpiece.
  • the acceleration nozzle comprises, at its outlet, a suitably perforated nozzle, made of a very hard material, such as sapphire or corundum.
  • the machining head has, at its outlet, a cutting barrel mounted in the head opposite the nozzle acceleration, i.e. downstream of the pellet nozzle, inside a gun holder housed in the casing.
  • an abrasive supply tube is placed between the outlet of said nozzle and said barrel.
  • the barrel therefore receives the jet of water emitted by the nozzle as well as the abrasive agent it must guide to the part to be cut.
  • the cutting barrel must be perfectly coaxial to the jet of water.
  • the document EP 0 221 236 describes a machining head a cutting machine, using a water jet according to preamble of claim 1.
  • the object of the present invention is to provide a machining head comprising means for setting that are capable of providing orientation perfect water jet emitted by the acceleration nozzle by relative to the cutting barrel, and which are of a simple, robust design, while being capable ensure rapid, repetitive and reliable adjustment of this orientation.
  • the present invention also aims to provide a sighting device capable of equipping such a head.
  • the adjustment can be reliable and repetitive since the position of the adjustment barrel, in its adjusted position, in being performed in place of the cutting barrel, corresponds exactly to the position that this cutting gun during machining, i.e. during passage through it of the jet emitted by the nozzle acceleration.
  • the present invention also relates to a sighting device intended to equip the machining head above, characterized in that it comprises a support provided with a removable target and an adjustment barrel configured to be housed in the gun holder, at the place of the cutting barrel.
  • the machining head 1 comprises a casing 2 which is intended to be fixedly mounted on a support S of a cutting machine D, both shown here so partial and very schematically.
  • Housing 2 which opens axially at both ends, has a generally tubular, essentially cylindrical shape, which is internally stepped as well only externally.
  • the casing 2 can be mounted directly on a support formed by a table multi-axis displacement machining, including "XY", or on a support formed by an articulated robot mounted on a cart.
  • the casing 2 By fixed mounting of the casing 2 on the machine cutting D, relative maintenance of the casing 2 by compared to the support S, which is sufficiently rigid and stable to ensure correct and continuous positioning of a water jet J emitted by the head 1 relative to the part P, during machining work and especially during displacement of the support S.
  • the casing 2 can be removably mounted on the support S, for interchangeability and maintenance reasons.
  • Head 1 is connected to a water supply under pressure, referenced A, via a piping T, shown in Figures 1 to 4 of a schematically in broken lines.
  • the head 1 comprises in its part rear AR a stepped connection nut 6 of form essentially cylindrical, which is housed and held in an extremely precise and fixed position at inside the housing 2.
  • the connection nut 6 has in this region a bearing surface 12, essentially cylindrical, arranged in close proximity of the gripping collar 8, downstream thereof.
  • the casing 2 also has in its rear part not referenced, a positioning bore 14 which is externally opening and receiving, by an adjustment bold, the cylindrical seat 12 of the connecting nut 6.
  • the connecting nut 6 also includes in its rear part, a thread 16 which is made of adjacent to the cylindrical seat 12 and which is engaged in a corresponding thread 18 formed in the casing 2, in the extension of its bore of positioning 14.
  • connection nut 6 The screw-nut coupling between thread 16 and internal thread 18 provides fixed retention and locking in position of the connection nut 6 relative to the housing 2.
  • the gripping collar 8 in the assembled position shown in FIGS. 1 and 2, rests in axial support, at the end, on the end rear, not referenced, of casing 2 and compresses a seal seal 20, of the O-ring type (named under the British appellation "O" Ring) housed in the end rear opening not referenced from casing 2.
  • This seal 20 seals the head 1 and protects adjustment means housed in the head 1, means which will be described in detail below.
  • the head 1 further comprises an acceleration nozzle 22 which is carried by the nut 6 while being mounted so coaxial with it. More particularly, the nozzle 22 is positioned and fixedly held in a housing 24 formed in the nut 6.
  • the acceleration nozzle 22 has a socket cylindrical 26 of generally elongated shape, at the rear of which is fitted with a valve tip or seat interchangeable 28 ensuring the connection of the head 1 on the piping T, and therefore constituting means Intake intended to be connected to the water supply under pressure A.
  • the elongated sleeve 26 comprises, formed in its part front not referenced, a cylindrical seat 30 engaged by a bold adjustment in a positioning bore 32 formed in the nut 6, at the rear thereof.
  • the socket 26 further comprises, downstream of the range 30, a thread 34 engaged with a thread 36 formed in the nut 6, close to the bore 32.
  • the bore 32 forms partly, with the internal thread 36, the housing 24 provided in nut 6.
  • the socket 26 has an inner conduit 27 intended to receive pressurized water (not shown) from the removable end piece 28.
  • the conduit 27 has in its upstream part, directly under the end piece 28, a first region 27a preferably of frustoconical shape (about 2%), narrowing forward, followed by second region 27b also preferably frustoconical (about 2%), but this time widening towards a nozzle nozzle 42.
  • This arrangement forms a means of internal cohesion of the water flow inside the socket 26 and ensures the formation of a so-called "coherent" water jet at the output of the acceleration nozzle 22, during adjustment which will be described below, adjustment which is carried out with a low pressure water supply.
  • the nut 6 also comprises, at its end front not referenced, an inner collar returning 40 on which axially rests the nozzle 42.
  • This nozzle nozzle 42 has a nozzle tip 44 which is held in a seat 46 also forming part of the nozzle 42.
  • the nozzle pad 44 which is shown here from schematically, is made of a hard material, such than sapphire or corundum, and it has an orifice central, not shown, capable of forming a trickle of water very fine which can constitute a cutting jet J appropriate, says "consistent" throw.
  • the seat 46 has a cylindrical skirt 48 which is housed, with a radial clearance, in the re-entrant collar 40 which has a shoulder 50 formed in the housing 24.
  • the seat 46 rests in axial support, by a shoulder correspondent not referenced, on the shoulder 50.
  • the acceleration socket 26 comprises at its front end, adjacent to region 27b, a clamping cavity 52 formed at the end and flaring towards the outside of the sleeve 26.
  • the clamping cavity 52 has a frustoconical or partially spherical shape and it rests on a frustoconical periphery 54 formed externally on the seat 46 of the nozzle 42.
  • the nozzle acceleration 22 which includes the sleeve 26, the end piece 28 and the nozzle 42, is precisely positioned and fixedly with respect to the casing 2. Being thus rigidly secured to the casing 2, the nozzle acceleration 22 can provide a water jet J presenting a perfectly stable position relative to the support S, whatever the movements of machine D.
  • the head 1 further comprises, in its front part AV, a cutting gun 60 which is supported and held by a gun holder 62, inside of it, this gun holder 62 being itself housed inside the housing 2.
  • the cutting barrel 60 is arranged in the head 1 coinciding with the output of the acceleration nozzle 22 to receive, downstream, the water jet emitted by this nozzle.
  • the barrel 60 is positioned precisely relative to the gun holder 62, thanks to its engagement in a bore of positioning 64 provided in the front part, not referenced, of the gun holder 62. Furthermore, the maintenance in fixed position of the barrel 60 is ensured by a clamp 66 disposed at the front of the gun holder 62 and comprising a wedge socket 68, made of a material elastomer.
  • the jamming socket 68 has a circumference frustoconical exterior 70 cooperating with a clamping cone 72 provided at the front end, not referenced, of the gun holder 62.
  • the clamping cone 72 is flared outwards and forwards, and it is formed on a wall of the barrel holder 62 which has an external thread 74 on which an internally threaded ring 78 is engaged, bearing axial on the clamping sleeve 68.
  • the gun holder 62 also includes a tube 80 of an abrasive, not shown, this tube 80 which is radially engaged in the barrel holder 62, being mounted at force in it, especially by hunting.
  • the tube 80 opens into the barrel holder 62, in a mixing chamber 82 formed therein.
  • the bedroom mixture 82 has an openwork annular ring 84 radially which is likewise driven into the barrel holder 62, coaxially therewith, and which comprises a radial opening 86 disposed opposite the tube 80 for receive the abrasive provided by it, and transmit it towards the cutting barrel 60.
  • the mixing chamber 82 further includes a deflector 88 which rests axially on the lateral edge of the ring 84 and which has an elastic skirt 90 blocking the outlet of opening 86 to prevent any inadvertent return of the abrasive agent to the nozzle acceleration 22.
  • This deflector 88 has a bore central 89.
  • This anti-reflux protection function provided by the deflector 88 prevents destruction of the pellet by hard material 44 which, in conventional devices, is subject to rapid wear.
  • this anti-reflux protection function also occurs when the skirt 90 of the deflector 88 is omitted.
  • the deflector 88 thus dimensioned may be subject to the nozzle nozzle 42, being disposed at the front thereof, for example by engagement with appropriate forms (not shown) or by collage.
  • the mixing chamber 82 is closed in its part rear by a lip seal 92 resting laterally on the deflector 88 and whose lip rubs against the free front end of the nut 6, at the outlet of the acceleration nozzle 22.
  • this gasket 92 provides sealing means of articulation, which will be described below, and which allow, during a jet adjustment operation of water J, a pivoting of the barrel holder 62 relative to the acceleration nozzle 22, whereas the latter, as we explained above, is fixedly mounted relative to the housing 2.
  • the articulation means according to the invention are constituted in the two embodiments described by a ball 94a, 94b formed between the barrel holder 62 and the housing 2.
  • the ball 94a, 94b is constituted by an annular ring 96a, 96b which is housed in the casing and which, as is will include, form a seat supporting and surrounding the gun holder 62.
  • This ring 96a, 96b is itself supported by the casing 2, in axial support against a shoulder 98 (see FIGS. 2 and 4) formed therein, and it has a partially worn rear spherical 100a or frustoconical 100b, on which rests directly a support part 102a, 102b formed on the gun holder 62.
  • the support part 102a of the first embodiment has a tapered tapered shape, flaring forward, while the supporting part 102b of the second embodiment ( Figures 3 and 4) presents a semi-circular or domed shape, flaring towards the back.
  • the ball 94b is shaped so that its center of pivoting (not shown) coincides with the orifice of the nozzle disc 44.
  • Each support part is formed on a flange 104a, 104b which is formed in the vicinity an unreferenced end of the barrel holder, at the rear of it.
  • the flange 104a, 104b is stressed axially on the ring 96a, 96b forming a seat, by through elastic means 106.
  • the elastic means 106 are formed by compression springs (same reference) housed in a annular ring 108 (see Figure 2), called ring thrust, reported inside the casing 2.
  • the ring 108 which is externally threaded, is screwed into the casing 2 while being engaged in its internal thread 18.
  • the push ring 108 is mounted in the casing 2 around the connecting nut 6, but with a radial clearance and with axial clearance with respect thereto.
  • the axial position of the ring 108 in the casing 2 can be adjusted regardless of nut position 6, to adjust the elastic pressure of the springs compression 106 on the back of the collar 104a, 104b.
  • the ring 108 has tap holes, not shown, configured to receive a adjustment, likewise not shown.
  • the front end of the nut connection 6 plunges into the hollowed-out rear part of the gun holder 62, coaxially therewith and with a sufficient radial clearance to allow the pivoting of the gun holder 62 in the housing 2.
  • the nut 6 also comprises at its front end a seal 110 (see FIG. 2), of the O-ring type, in radial abutment on the barrel holder 62.
  • the adjustment means according to the invention further comprise screws 112 (in particular four in number, offset by 90 °, two of them being here only shown) which allow the barrel holder 62 to be locked in a fixed position relative to to housing 2.
  • the screws 112 are mounted in the casing 2, at the front of it and they act radially around the perimeter outside of the gun holder 62.
  • the adjustment means according to the invention comprise in addition a sighting device according to two modes of embodiment ( Figures 2, 4 and 5) which includes a support 122 designed to be attached to the barrel holder 62.
  • This support 122 is shown seen from the front in lines full and, in Figures 2 and 4, it is also seen from the side schematically in broken lines.
  • the sighting device 120a, 120b, (and more precisely its support 122) has an adjustment barrel 124 which is intended, as seen in Figure 2, to come and stay in the barrel holder 62, instead of the barrel cutting 60, in bore 64.
  • this adjustment barrel 124 has an internal diameter DR greater than the diameter DD interior ( Figure 1) of the cutting gun 60.
  • the jet of water J can therefore pass through the adjustment barrel 124 without touch the inner wall of it and without being disturbed during the adjustment operation.
  • the support 122 is formed by a piece in the form of "C", a branch 126 of which forms a base in which is housed a target 128a, 128b, while another branch 130 carries the adjustment barrel 124 which is oriented so normal to target 128a, 128b.
  • the two branches 126 and 130 are connected by a third, 127, called branch of liaison.
  • the target 128a consists essentially of an interchangeable flat-shaped pad mounted on removably in support 122, and more particularly in branch 126.
  • the branch 126 which is essentially circular has a nut 132 which blocks the target 128a.
  • the pellet forming the target 128a has an orifice control unit 134 towards which the water jet J is pointed during adjustment. Thanks to the openwork structure of the support 122, an operator can, during the setting, observe on practically all sides (over approximately 300 °) the impact of J water jet supplied at low pressure, but so consistent through the socket 26, on the target 128a.
  • This sighting device 120b differs from the device 120a by its target 128b which, although mounted identically in the support 122, presents with respect to the target 128a a structure allowing even easier and more adjustment end.
  • the target 128b has a base 140 of even held in branch 126 by nut 132, but from which rises in its center a pointer 142 of form pyramidal, oriented towards the back of the head 1, i.e. towards the exit of the adjustment barrel 124.
  • the pointer 142 is forcibly engaged in the base 140. It comprises four plane converging faces 142a to 142d ( Figure 5) inclined at an angle ⁇ of approximately 10 ° relative to the direction of exit of the water jet J, and therefore with respect to the longitudinal geometric axis of the sighting device 120b.
  • the pyramid pointer 142 On either side of the pyramid pointer 142 are formed in the base 140 four oblong recesses 144a to 144d oriented parallel to the bases of the pointer 142, as well as in the extension of its four faces 142a to 142d.
  • These four hollows 144a to 144d have respectively a flared bowl shape at the entrance, and they are open towards the water jet J. It will be specified here that the four hollows 144a to 144d are all calibrated to the same dimension.
  • the base 140 is for example made of aluminum while the pointer 142 is made in one hard material, such as tungsten carbide.
  • the head adjustment method according to the invention is the next.
  • a coherent jet of water thanks to the shape of the conduit 27 of sleeve 26, forms at the outlet of the barrel adjustment and hits the target 128a, 128b.
  • the sighting device 120a, 120b is then moved manually, by the operator not shown, by doing pivot the barrel holder 62 relative to the casing 2.
  • the gun holder 62 is blocked by the screws 112 when the water jet J is placed in coincidence with orifice 134.
  • the operator after opening the water supply low pressure, moves the pyramid pointer 142 to that its tip is perfectly under the jet of water J and that four identical water bundles (not shown) form at the exit of the four recesses calibrated from base 140, under the sighting device 120b. Any difference in form in any of the beams at the exit of the device indicates to the operator a setting error and the direction in which it should move the barrel holder 62.
  • the sight is released by loosening the clamp 66, then out. Then, we reposition, in the barrel holder 62, the barrel cutting 60 which is now arranged so perfectly coaxial with the working jet J.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
EP93909747A 1992-06-01 1993-05-27 Tete d'usinage d'une machine de decoupage au jet d'eau et dispositif de visee destine a equiper une telle tete Expired - Lifetime EP0597057B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9206695 1992-06-01
FR9206695 1992-06-01
PCT/CH1993/000138 WO1993024277A1 (fr) 1992-06-01 1993-05-27 Tete d'usinage d'une machine de decoupage au jet d'eau et dispositif de visee destine a equiper une telle tete

Publications (2)

Publication Number Publication Date
EP0597057A1 EP0597057A1 (fr) 1994-05-18
EP0597057B1 true EP0597057B1 (fr) 1998-08-12

Family

ID=9430379

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93909747A Expired - Lifetime EP0597057B1 (fr) 1992-06-01 1993-05-27 Tete d'usinage d'une machine de decoupage au jet d'eau et dispositif de visee destine a equiper une telle tete

Country Status (7)

Country Link
US (1) US5469768A (es)
EP (1) EP0597057B1 (es)
JP (1) JPH06509520A (es)
AT (1) ATE169544T1 (es)
DE (1) DE69320301T2 (es)
ES (1) ES2122004T3 (es)
WO (1) WO1993024277A1 (es)

Cited By (1)

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CN102554967A (zh) * 2010-12-23 2012-07-11 中国核动力研究设计院 一种水射流切割执行装置

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US11554461B1 (en) 2018-02-13 2023-01-17 Omax Corporation Articulating apparatus of a waterjet system and related technology
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EP4127527A1 (en) 2020-03-24 2023-02-08 Hypertherm, Inc. High-pressure seal for a liquid jet cutting system
US11904494B2 (en) 2020-03-30 2024-02-20 Hypertherm, Inc. Cylinder for a liquid jet pump with multi-functional interfacing longitudinal ends

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102554967A (zh) * 2010-12-23 2012-07-11 中国核动力研究设计院 一种水射流切割执行装置
CN102554967B (zh) * 2010-12-23 2014-03-26 中国核动力研究设计院 一种水射流切割执行装置

Also Published As

Publication number Publication date
ATE169544T1 (de) 1998-08-15
DE69320301T2 (de) 1999-04-08
US5469768A (en) 1995-11-28
WO1993024277A1 (fr) 1993-12-09
ES2122004T3 (es) 1998-12-16
EP0597057A1 (fr) 1994-05-18
JPH06509520A (ja) 1994-10-27
DE69320301D1 (de) 1998-09-17

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