EP0140870B1 - Dispositif de coupe par jet de fluide - Google Patents

Dispositif de coupe par jet de fluide Download PDF

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Publication number
EP0140870B1
EP0140870B1 EP19840890163 EP84890163A EP0140870B1 EP 0140870 B1 EP0140870 B1 EP 0140870B1 EP 19840890163 EP19840890163 EP 19840890163 EP 84890163 A EP84890163 A EP 84890163A EP 0140870 B1 EP0140870 B1 EP 0140870B1
Authority
EP
European Patent Office
Prior art keywords
fluid
jet cutting
face
jet
nozzle 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
Application number
EP19840890163
Other languages
German (de)
English (en)
Other versions
EP0140870A1 (fr
Inventor
Walter Dipl.-Ing. Cadek
Erich Jaritz
Franz Windisch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vereinigte Edelstahlwerke AG
Original Assignee
Vereinigte Edelstahlwerke AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Vereinigte Edelstahlwerke AG filed Critical Vereinigte Edelstahlwerke AG
Publication of EP0140870A1 publication Critical patent/EP0140870A1/fr
Application granted granted Critical
Publication of EP0140870B1 publication Critical patent/EP0140870B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F3/00—Severing by means other than cutting; Apparatus therefor
    • B26F3/004—Severing by means other than cutting; Apparatus therefor by means of a fluid jet

Definitions

  • the cutting head along predetermined shapes, guides, stencils, backdrops or the like. Which are designed according to the contours to be cut in the material is moved. It has been shown to be advantageous if the nozzle head in the area near the nozzle is guided by the operator to a guide curve, e.g. B. pressed against the edge of a template and at the same time this guide curve, for. B. can be pushed along the template edge. It can z. B. with the stencil edge area cooperating projections or the like may be provided, so that a kind of "hanging or" supporting "the nozzle head on a guide, z. B. at the edge of a template.
  • a guide curve e.g. B. pressed against the edge of a template and at the same time this guide curve, for. B. can be pushed along the template edge.
  • z. B. with the stencil edge area cooperating projections or the like may be provided, so that a kind of "hanging or” supporting "the nozzle head on a guide, z
  • the nozzle head When cutting, the nozzle head should be pressed as snugly as possible against a guide line or surface, with uniform feed between the outer surface of the nozzle head and the guide surface, while overcoming the sliding friction.
  • the object of the invention is to provide such a liquid jet cutting device, in which practically only manual or automatic pressing of the nozzle head or a guide piece connected to it against a guide line, guide surface, for example, a template or the like is to be provided during the Feed along a cutting curve is no longer carried out with sliding friction.
  • the invention thus relates to a liquid jet cutting device with a cutting guide device with at least one cutting nozzle head with jet nozzle which can be moved and aligned at least one dimensionally and can be supplied with cutting jet medium via feed (s), characterized in that a, in particular hand-held, preferably connected to at least one manipulation element Nozzle head with nozzle by means of a cutting contour guiding device connected to it, with at least one guiding line or surface which can be rolled or unrolled on a contour or surface corresponding to the contour to be cut and which can preferably be pressed by hand against this line or surface, of one in terms of its speed, preferably by means of a manipulation element , adjustable drive unit driven feed drive member is movable.
  • a particular advantage of the device according to the invention is that it is only necessary to ensure that a guide device for the nozzle head is pressed firmly against the guide surface of a template, rail, link or the like, while the feed, now with rolling friction, takes place by means of a feed drive element .
  • the feed element which is essentially designed as a driven roller, along a curve with practically no surface extension, for example an edge of a template or a line of contact between an approximately barrel-shaped template edge and the feed roller can be guided.
  • the guide surface of the template and the feed drive element can also have a contour that cooperates with one another.
  • the template itself can be bypassed to the outside or inside, it can od even with its edge region comprising the guide rail or the like. Be formed.
  • the template is arranged substantially parallel to the item to be cut, and it is often convenient to use the template directly to hold the item to be cut, it then lies directly on it.
  • the device according to the invention can be designed such that the feed drive element is arranged on a carrier which is in a mechanically rigid, possibly detachable connection with the nozzle head and therefore carries out every movement precisely with it.
  • the feed drive element guides the contour connected to the nozzle head approximately with the axis of the outflow channel of the jet nozzle is substantially parallel axis.
  • the guide surface is designed as a prism surface of a template, preferably of the same length and essentially corresponding to the basic projection of its course, and the feed drive element of the nozzle head with an essentially cylindrical drive surface .
  • the feed drive element has at least one circumferential projection, which extends radially away from its axis and drive surface, the radial surface of which, in cooperation with the feed drive surface, is designed to cooperate with a guide surface and an edge region of the upper side of a template, can also be achieved in addition to accurate guidance be that the operator can support the nozzle head with the help of the aforementioned projection simultaneously with the pressure on the guide surface on the top of a template in the edge region, so that a constant distance between the jet outlet opening of the nozzle and the material to be cut and thus the cut quality is achieved becomes.
  • the feed drive surface and the radial surface of the support projection essentially enclose an angle of 90 ° with one another.
  • the feed drive element is approximately coil-shaped with two away from its axis and drive surface extending projections is formed and these substantially encompass the edge region of a guide template.
  • the bottom of the template does not lie directly against the workpiece to be cut, at least in the area of its edge.
  • the edge area is also gripped behind on the underside by means of the second radial projection.
  • the radial extension of this projection is advantageously made smaller than the above-mentioned projection provided for support on the top of the template.
  • the generators move radially from the axis and feed Drive surface extending away surface of at least one projection enclose an angle ⁇ of more than 90 ° with the generatrix of the drive surface of the feed drive member.
  • Faults in the rolling motion of the feed drive element can be avoided if the surface (s) of the projection or the projections, which are, so to speak, on the top of the template and, if applicable, also on the underside, and which rotate with it, extend radially Feed drive element has or have little resistance, which can be ensured by the fact that the radially extending away from the axis and feed drive surface area of at least one of the projections with a friction-reducing coating or intermediate layer, for. B. made of fluorine-containing polymer.
  • the feed drive surface of the feed drive member with a friction-increasing coating or intermediate layer, for. B. made of rubber.
  • a cylindrical feed drive surface with the channel of the cutting nozzle coaxially mounted on the nozzle head feed drive member with a passage opening for the cutting jet with a on the feed pipe or on a surrounding pipe , preferably via roller bearings, rotatably mounted sleeve.
  • this type of construction enables the nozzle head, which is connected to manipulation handles for guiding and pressing, to be able to absorb the forces without deformation and endangering the collimation tube, even at relatively high contact pressures.
  • the sleeve of the feed drive member preferably has a force transmission element, preferably a gearwheel, which cooperates with a further force transmission element, preferably a gearwheel of a drive unit detachable, connected.
  • the drive unit can be a space-saving low-voltage DC motor of smaller diameter. Hydraulic or pneumatic motors or the like can in principle also be used.
  • the advantage of an electric motor is in particular its exact controllability. It also offers the possibility of keeping its speed and thus the feed rate constant even when the contact pressure of the nozzle head changes to a template, so that high cutting quality and economical operation can be achieved.
  • a form of training which is particularly advantageous for hand-held devices is provided if the rotational speed causing the rolling movement speed of the feed drive element of the nozzle head on a guide line or surface can be controlled by the drive unit thereof by means of a speed control device which can be adjusted with a rotatable handle.
  • one of the two manipulation elements i.e. a handle that serves to mechanically guide the nozzle head
  • the operator can, by simply turning the handle, achieve a feed speed that is favorable in terms of material and cutting contour set directly while operating the device without additional manipulation.
  • a feed rate that can be precisely adjusted to the cutting curve is thus achieved in an ergonomically advantageous manner.
  • the speed control device of the drive unit for the feed drive element has a device for keeping constant a speed set in each case by means of a manipulation element on the control device.
  • FIG. 1 shows an embodiment of a hand-held liquid jet cutting device according to the invention in an oblique overall view
  • FIGS. 2 and 3 partially cut front and side view of a three-dimensionally movable and adjustable nozzle head equipped with nozzle-coaxial feed drive element and manipulation handles
  • FIG. 4 shows a detailed view of a feed drive element with the edge region of a template
  • FIG. 5 schematically shows a preferred device for controlling the speed of a motor for the feed drive element with a device for keeping the rotational speed constant.
  • the liquid jet hand-held cutting device shown in FIG. 1 has a frame carrying a high-pressure armature 19 and control box 16 with a stand 17 fastened to a movable base plate 21 with pivotable articulated arms 4 with a balance holder 3, with a vertical guide 2 at the free end of the arm 4
  • Three-dimensional guide 25 is connected to the nozzle head 5, which can be supplied with liquid medium supplied via high-pressure line 1, with guide handles 6, and on and off buttons 7.
  • a swiveling cutting jet catcher 8 by means of a pneumatic cylinder 14, from which the processed cutting medium is discharged from the suction pump 22 into the collecting container 10 with an overflow 11 via a suction line 9.
  • the drive for the feed drive element 101 of the nozzle head 5 takes place along a template edge, not shown, via gearwheel 23 on gearwheel 24, which is mounted on a rotatable sleeve which surrounds the nozzle head front part and carries the drive element 101.
  • FIGS. 2 and 3 show how, in the case of a cutting contour guiding device 100 provided according to the invention, in the nozzle head 70 of the cutting device via a connecting piece 16 through its channel 161, the high-pressure medium is fed to the channel 31 of the collimation tube 3 and the path of the medium via that of the nozzle holder 1 held jet nozzle stone 11, z. B. from sapphire continues.
  • a rotating sleeve 4 is rotatably mounted via a first roller bearing 6 and a second roller bearing designed as a needle bearing 5, which at its lower end springs back into the essential part of the feed Drive device 100 forming cylindrical feed drive element 101 passes over with drive surface 103, which, rolling along a template guide surface 61 of a template 60, ensures the movement of the nozzle head 70 along the template edge.
  • the jet medium emerging from the channel 110 from the nozzle 11 at high speed rushes through the channel 108 located in the feed drive element 101 without touching the wall, then the workpiece 80 to be cut is formed by a cut and is received by the sleeve 37 of a jet catcher 38 and strikes one in it Chamber 35 arranged, residual radiation energy-wiping hard metal piece 41 which can be interchangeably arranged by means of union nut 36.
  • the used blasting medium is suctioned off via a suction line 42 which is detachably fastened by means of the hand screw 29 and which is at the same time a holder for the jet catcher.
  • the aforementioned sleeve 4 with the actual feed drive member 101 is driven via a gear 9 which is detachably arranged on it and which meshes with gear 8 of a direct current motor 12 with an electric tachometer generator 51, preferably in a speed-controlled manner.
  • the nozzle head 70 is connected via a mounting piece 71 to two manipulation handles 47, 48 for guidance along a template edge, which handles each have switches 24 for moving the entire undercarriage back and forth, switches 25 for switching the direction of rotation of the motor 12 and safety push buttons 26, both at the same time must be pressed to convey the blasting medium point.
  • one of the handles 47 is designed to be rotatable and resettable and is connected to a rotary potentiometer 27 by means of which the speed of the motor 12 and thus the speed of the drive element 101 can be regulated via a feed control device 200.
  • the control device 200 has a controller with a potentiometer 205, by means of which the preselection of a maximum feed rate that is precisely matched to a particular material to be cut can be carried out, i. H. that in the range of the rotatability of the handle 47, only a feed up to a maximum of the set maximum feed can take place. This means that an unintentional “over-cutting of a cutting speed compatible with the material to be cut is eliminated and the cutting quality increases further.
  • a tachometer generator 51 and electric motor 12 converting the engine speed into electronic measured variable are connected to the controller 200, which in turn determines the engine speed depending on the angular position of the handle 47 and potentiometer 27 and is based on an electrical one supplied by the tachometer generator 51 Size in the event of a change in the load and thus a change in the speed of the motor, which restores the set speed.
  • FIG. 4 shows part of the above-mentioned sleeve 4, which is connected to the feed drive element 101 and forms a support projection 105 and is coaxially rotatably mounted on a nozzle head.
  • the radial drive surface 104 optionally equipped with a friction-reducing coating, extends from the feed drive surface 103, optionally provided with a rubber friction lining.
  • a dashed line indicates a lower, radially less far-extending second projection 105a with radial surface 104a.
  • the radial surfaces 104 and possibly 104a mentioned and the drive surface 103 of the feed drive element 101 are formed together with the cutting contour guide curve 61, top side 62 and optionally also underside of the edge region 60a of a template 60 arranged above the material to be cut 80 and possibly holding it.
  • the angle a which the generatrix of the radial surface 104, 104a enclose with that of the drive surface 103 of the feed drive member 101 is designated.
  • Fig. 5 shows a preferred embodiment for a speed and thus feed speed control or control device with constant speed of the feed drive unit.
  • control device 2 which is also supplied by a direct current source 3 for a nozzle head feed drive motor M, a voltage corresponding to a desired motor speed and thus nozzle head feed speed is tapped after passing through the stabilization S by means of a rotary potentiometer R1 which can be set by means of the rotatable handle mentioned, which is the reason -Power supply to motor M.
  • a difference between the speed or corresponding voltage setpoint and actual value which occurs when the motor M is loaded during the nozzle head feed is fed via amplifier V3 to a pulse width modulator P coupled to a further amplifier V4, from which the power transistors corresponding to the said difference are output T1, T2 are controlled, which in turn change the amount of current supplied to the motor M, until the actual voltage and setpoint value supplied by the tachometer generator G match each other according to the specification of the potentiometer R1 (corresponding to 27 in FIGS. 2, 3) on the rotary handle.
  • the potentiometer R6 (corresponding to 205 in Fig. 2) is used to individually adjust the maximum speed of the motor M and thus a maximum feed, so that within the entire tap range of the potentiometer R1 or the full angle of rotation of the rotary handle only feed speeds up to can only be set to the maximum limit.
  • the circuit briefly explained here is characterized by high robustness, flexibility, stability and quick responsiveness.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Claims (13)

1. Dispositif de coupe par jet de fluide comportant un dispositif de guidage de ligne de coupe (100), une tête de tuyère (70) de coupe au moins, mobile et orientable unidimensionnellement au minimum, approvisionnable en milieu pour jet de coupe par une (des) alimentation(s), une tuyère de jet (11), caractérisé en ce qu'une tête de tuyère (70), guidable manuellement en particulier, reliée de préférence au minimum à un organe de manipulation (47, 48), comportant une tuyère (11), est mobile au moyen d'un dispositif de guidage de contour de coupe (100) avec lequel elle est reliée, dispositif comportant au minimum un organe de commande d'avance (101), commandé par un équipement moteur (12) réglable, de préférence au moyen d'un organe de manipulation (47), dans sa vitesse de rotation, roulant ou capable de rouler le long d'une ligne ou d'une surface de guidage (61) correspondant au contour à couper et comprimable, de préférence manuellement, contre cette ligne ou cette surface (61).
2. Dispositif de coupe par jet de fluide, en particulier appareil de coupe par jet de fluide guidable manuellement, selon la revendication 1, caractérisé en ce que l'organe de commande d'avance (101) du dispositif de guidage de contour (100), relié avec la tête de tuyère (70), est formé d'un axe pour l'essentiel parallèle à l'axe du canal d'éjection (110) de la tuyère de jet (11).
3. Dispositif de coupe par jet de fluide, en particulier appareil de coupe par jet de fluide guidable manuellement, selon la revendication 1, caractérisé en ce que l'organe de commande d'avance (101) est formé d'un axe pour l'essentiel identique à l'axe du canal d'éjection (110) de la tuyère de jet (11).
4. Dispositif de coupe par jet de fluide, en particulier appareil de coupe par jet de fluide guidable manuellement, selon l'une des revendications 1 à 3, caractérisé en ce que la surface de guidage (61) est formée comme une surface prismatique d'un gabarit (60) présentant des génératrices, de longueur égale de préférence, correspondant pour l'essentiel à la projection de base de son tracé et que l'organe de commande d'avance (101) de la tête de tuyère (70) est formé d'une surface de commande (103) cylindrique pour l'essentiel.
5. Dispositif de coupe par jet de fluide, en particulier appareil de coupe par jet de fluide guidable manuellement, selon l'une des revendications 1 à 4, caractérisé en ce que l'organe de commande d'avance (101) présente au minimum, s'éloignant de son axe et de sa surface de commande (103), une saillie (105) rotative, dont la surface radiale (104) est formée pour coopérer avec la surface de commande d'avance (103), une surface de guidage (61) et un bord (62a) de la surface supérieure (62) d'un gabarit (60).
6. Dispositif de coupe par jet de fluide, en particulier appareil de coupe par jet de fluide guidable manuellement, selon l'une des revendications 1 à 5, caractérisé en ce que l'organe de commande d'avance (101) est constitué sous forme approximative de bobine, avec deux saillies (105, 105a) s'éloignant de son axe et de sa surface de commande (103) et que celles-ci entourent pour l'essentiel la bordure (60a) d'un gabarit (60) de guidage.
7. Dispositif de coupe par jet de fluide, en particulier appareil de coupe par jet de fluide guidable manuellement, selon l'une des revendications 1 à 6, caractérisé en ce que les génératrices de la (des) surface(s) (104, 104a) de l'une des saillies (105, 105a) au moins s'éloignant radialement de l'axe et de la surface de commande d'avance (103) forment un angle a de plus de 90° avec les génératrices de la surface de commande (103) de l'organe de commande d'avance (101).
8. Dispositif de coupe par jet de fluide, en particulier appareil de coupe par jet de fluide guidable manuellement, selon l'une des revendications 1 à 7, caractérisé en ce que la '(les) surface(s) (104, 104a) de l'une au moins des saillies (105, 105a), s'éloignant radialement de l'axe et de la surface de commande d'avance (103) est (sont) pourvue(s) d'une enduction ou d'une couche intermédiaire atténuant le frottement, en polymère fluoritique par exemple.
9. Dispositif de coupe par jet de fluide, en particulier appareil de coupe par jet de fluide guidable manuellement, selon l'une des revendications 1 à 8, caractérisé en ce que la surface de commande d'avance (103) de l'organe de commande d'avance (101) est munie d'une enduction ou d'une couche intermédiaire augmentant le frottement, en caoutchouc par exemple.
10. Dispositif de coupe par jet de fluide, en particulier appareil de coupe par jet de fluide guidable manuellement, selon l'une des revendications 1 à 9, caractérisé en ce qu'un organe de commande d'avance (101) présentant une surface de commande d'avance (103) cylindrique logé coaxialement avec le canal (110) de la tuyère de coupe (11) sur la tête de tuyère (70) est relié avec l'ouverture de sortie (108) de jet de coupe, avec un manchon (4) tournant, de préférence au moyen de roulements (5, 6) sur un tuyau (3) d'amenée ou un tube (111) entourant celui-ci.
11. Dispositif de coupe par jet de fluide, en particulier appareil de coupe par jet de fluide guidable manuellement, selon l'une des revendications 1 à 10, caractérisé en ce que le manchon (4) de l'organe de commande d'avance (101) est relié, de préférence de manière amovible, avec un élément de transmission, une roue dentée (9) de préférence, qui coopère avec un autre élément de transmission, de préférence une roue dentée (8) d'un équipement moteur (12).
12. Dispositif de coupe par jet de fluide, en particulier appareil de coupe par jet de fluide guidable manuellement, selon l'une des revendications 1 à 11, caractérisé en ce que la vitesse de rotation produisant la vitesse de mouvement rotatif de l'organe de commande d'avance (101) de la tête de tuyère (70) contre une ligne ou une surface de guidage (61), est .commandable par son équipement moteur (12) au moyen d'un dispositif de réglage de vitesse de rotation (200) réglable avec un organe de manipulation, de préférence une poignée (47) mobile autour d'un axe.
13. Dispositif de coupe par jet de fluide, en particulier appareil de coupe par jet de fluide guidable manuellement, selon l'une des revendications 1 à 12, caractérisé en ce que le dispositif de réglage de vitesse de rotation (200) de l'équipement moteur (12) pour l'organe de commande d'avance (103) comporte un dispositif de stabilisation d'une vitesse de rotation mise au point avec le dispositif de réglage (200), prédéterminée avec un organe de manipulation (47).
EP19840890163 1983-09-06 1984-08-30 Dispositif de coupe par jet de fluide Expired EP0140870B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT3175/83 1983-09-06
AT0317583A AT379103B (de) 1983-09-06 1983-09-06 Fluessigstrahl-schneidvorrichtung

Publications (2)

Publication Number Publication Date
EP0140870A1 EP0140870A1 (fr) 1985-05-08
EP0140870B1 true EP0140870B1 (fr) 1987-11-11

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EP19840890163 Expired EP0140870B1 (fr) 1983-09-06 1984-08-30 Dispositif de coupe par jet de fluide

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EP (1) EP0140870B1 (fr)
AT (1) AT379103B (fr)
DE (1) DE3467322D1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4827679A (en) * 1987-11-24 1989-05-09 Ltv Aerospace & Defense Company Fluid jet cutting system with self orienting catcher
FR2632554A1 (fr) * 1988-06-09 1989-12-15 Aerospatiale Machine d'usinage
GB201107225D0 (en) 2011-04-29 2011-06-15 Peira Bvba Stereo-vision system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4048885A (en) * 1975-03-17 1977-09-20 Ichiro Miyakita Method and apparatus for cutting continuously moving sheet material by jet stream of fluid under high pressure
US4312254A (en) * 1977-10-07 1982-01-26 Gerber Garment Technology, Inc. Fluid jet apparatus for cutting sheet material
US4204448A (en) * 1978-11-13 1980-05-27 Gerber Garment Technology, Inc. Fluid jet cutting apparatus having self-healing bed

Also Published As

Publication number Publication date
EP0140870A1 (fr) 1985-05-08
DE3467322D1 (en) 1987-12-17
AT379103B (de) 1985-11-25
ATA317583A (de) 1985-04-15

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