EP1599403A1 - Appareil de decoupe au laser - Google Patents

Appareil de decoupe au laser

Info

Publication number
EP1599403A1
EP1599403A1 EP03779580A EP03779580A EP1599403A1 EP 1599403 A1 EP1599403 A1 EP 1599403A1 EP 03779580 A EP03779580 A EP 03779580A EP 03779580 A EP03779580 A EP 03779580A EP 1599403 A1 EP1599403 A1 EP 1599403A1
Authority
EP
European Patent Office
Prior art keywords
sheet material
laser
bed
chamber
leading edge
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.)
Withdrawn
Application number
EP03779580A
Other languages
German (de)
English (en)
Other versions
EP1599403A4 (fr
Inventor
Christopher Max Modra
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP1599403A1 publication Critical patent/EP1599403A1/fr
Publication of EP1599403A4 publication Critical patent/EP1599403A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H35/00—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
    • B65H35/0006—Article or web delivery apparatus incorporating cutting or line-perforating devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
    • B23K26/142—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor for the removal of by-products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
    • B23K26/1435—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor involving specially adapted flow-control means
    • B23K26/1436—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor involving specially adapted flow-control means for pressure control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
    • B23K26/1462—Nozzles; Features related to nozzles
    • B23K26/1464—Supply to, or discharge from, nozzles of media, e.g. gas, powder, wire
    • B23K26/1476—Features inside the nozzle for feeding the fluid stream through the nozzle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/16—Removal of by-products, e.g. particles or vapours produced during treatment of a workpiece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H35/00—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
    • B65H35/0006—Article or web delivery apparatus incorporating cutting or line-perforating devices
    • B65H35/002—Hand-held or table apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/515—Cutting handled material
    • B65H2301/5153—Details of cutting means
    • B65H2301/51536—Laser

Definitions

  • a LASER CUTTING APPARATUS TECHNICAL FIELD OF THE INVENTION This invention relates to a laser cutting apparatus for cutting sheet materials, and in particular but not limited thereto, the laser cutting apparatus is configured to cut patterned fabrics for blinds.
  • Laser generating devices have been used in many cutting applications.
  • these devices there is a focussed laser beam directed onto a sheet material to be cut and the beam is controlled to travel in a path over the material.
  • the path describes a trajectory which corresponds to the desired cutting profile.
  • the cutting profile may include a desired pattern.
  • the material is cut into a patterned profile that is determined by the travel path of the beam.
  • smoke and fumes are inevitably produced during the cutting operation.
  • the cut material can be stained by the smoke and fumes. As the stained materials cannot be used in a good quality product they are generally discarded as wastes.
  • a sheet material to be cut must be held down on a bed during the cutting operation. Clamps or relatively heavy plastic films have been employed for this purpose. Both the clamps and the plastic films are manually applied to the sheet material. Accordingly, the use of these articles for holding a sheet material does not allow for a fully automated cutting process of sheet materials.
  • the cut sheet material has a trim around the desired cut panel.
  • the trim and the cut panel must be removed from the cutting station by separate actions. While any of them remains in the cutting station, a new sheet material can not be positioned in the cutting station for a cutting operation. Accordingly, the separate actions needed to remove the trim from the panel of a cut sheet material present a delay in recommencing of repeated cutting operations.
  • the trim and the cut panel are usually picked up by a clamping device. As the trim and the cut panel lie flat on the bed, a part of the clamping device must be positioned under them before a clamping action can be effected. The applicant has observed that when positioning the part of the clamping device under the trim or cut panel, the material may not be completely flat when it is being clamped. As such, the material may be unnecessarily folded with permanent fold lines and would have to be discarded.
  • Some cut panels require creases to be formed thereon so as to allow folding about the crease lines to form a desired pattern.
  • the action to impart creases is done as a separate operation at a location outside the cutting zone. Again, for this reason a fully automated process is hindered.
  • An object of the invention is to substantial alleviate or to reduce to a certain level one or more of the prior art disadvantages.
  • the present invention resides in a laser cutting apparatus for cutting sheet materials.
  • the apparatus includes a bed having a top surface for a sheet material to be positioned thereon, a gantry arranged to control lably travel in a first direction along the bed and configured to extend over the bed in a second direction that is substantially transverse to the first direction, and a carriage being arranged to controllably travel along the gantry.
  • the bed has a holding arrangement for holding the sheet material in position on said top surface.
  • a laser head is located on the carriage.
  • the laser head has a laser nozzle and is arranged to receive a laser beam from a laser source and to direct the laser beam through the laser nozzle and towards the bed for cutting the sheet material.
  • An enclosure member having a first low pressure chamber therein is arranged about the laser nozzle.
  • the first chamber is arranged so that the pressure therein is lower than atmospheric pressure and has at least one suction opening positionable beneath the laser nozzle for entraining a substantial amount of by-products produced during cutting of the sheet material into the first chamber and for causing a part of the sheet material under the suction opening to be lifted off the top surface.
  • the present invention provides a laser cutting apparatus comprising:
  • a gantry is arranged to move in a first direction along the table
  • a gripping device and a controllably movable carriage mounted on the gantry, the gripping device being arranged to controllably clamp the sheet material and to pull the sheet material across the table, and the carriage being arranged to move along the gantry in a second direction which is substantially transverse to said first direction;
  • the carriage having mounted thereon at least one controllable crease wheels for forming crease lines into the sheet material, and a controllable laser head for cutting the sheet material.
  • the present invention resides in a laser head for a sheet material cutting apparatus.
  • the laser head comprises a laser nozzle arranged for to receive a laser beam from a laser source and to direct the laser beam therethrough and towards the sheet material, and an enclosure member being arranged about the laser nozzle and having a first low pressure chamber therein.
  • the first chamber is arranged so that the pressure therein is lower than atmospheric pressure and has at least one suction opening positionable beneath the laser nozzle for entraining a substantial amount of by-products produced during cutting of the sheet material into the first chamber.
  • a cover having a series of apertures is arranged to be selectively movable to a position(s) in alignment with the or each of said at least one suction opening and while being moved the by-products caught in the apertures are removed by interaction with the enclosure member.
  • the cover may be arranged to be movably mounted on the enclosure member.
  • a retention arrangement may be provided for retaining said cover at the position(s) of alignment.
  • the retention arrangement has spaced retention holes in said cover and the retention holes are configured to receive retention elements on said enclosure member.
  • the retention elements are bearings biassed to be receptive in said retention holes when an aperture(s) in said cover is in the alignment position(s), and upon applying a force to move said cover the bias on the retention bearings is overcome and the bearings thereby retreating from the retention holes to allow movement of the cover relative to the enclosure member towards a subsequent alignment position(s).
  • the present invention resides in a gripping device for a cutting apparatus having a flat bed table on which a sheet material to be cut is laid out.
  • the gripping device comprises an upper plate member and a lower plate member arranged to move in a first direction along the table and to controllably clamp a leading edge of the sheet material.
  • the lower plate member is arranged to be movable relative to said upper plate member between a clamping position for clamping the sheet material therebetween and a pickup position for picking up the leading edge.
  • the lower plate is configured with a front edge opposite to said leading edge and is arranged so that at said pickup position movement thereof to contact the sheet material causes a relatively small part or parts along the leading edge come into an initial contact with the front edge and further movement thereof causes other parts along the leading edge to progressively come into contact with the front edge and to lie over the front edge for clamping between the upper and lower plate members.
  • the front edge is knife edge shaped. It is also preferred that the front edge is wavy shaped with one or more crests.
  • the lower plate may have a substantially straight front edge and is pivotal ly mounted at one end thereof.
  • the lower plate is controlled so that at said initial contact the front edge is at an angle to said leading edge and thereafter the lower plate is pivotal ly move in a plane parallel to the flat bed of said table so that the front edge is substantially parallel to said leading edge.
  • the holding arrangement includes a second low pressure chamber arranged below the bed and a plural ity of through holes extending through the top surface and in fluid communication with the second chamber.
  • the second chamber is arranged so that the pressure therein is lower than atmospheric pressure.
  • a relatively high volume but low pressure air is arranged to flow through the holes into the second chamber.
  • first chamber and the second chamber are substantial ly in a vacuum.
  • Air flows through the first and second chambers may be controlled so that there is an air gap between the suction opening and the lifted part of the sheet material. Air is then caused to flow through the air gap into the first chamber. This assists in the entrainment of the by-products above the sheet material to flow into the first chamber.
  • Controllable crease wheels may be arranged on the carriage for forming creases in the sheet material.
  • the wheels may have a relatively large diameter in comparison to said through holes.
  • the wheels may be configured with a profile to limit depth of creases in the sheet material.
  • the wheels may be in the form of a single or dual edge profile.
  • Each of the wheels with a single edge profile may have a main wheel body and an edge portion extending around and protruding from the main body.
  • Each of the wheels with a dual edge profile may have a main wheel body and spaced edge portions extending around and protruding from the main body.
  • the carriage may also have a controllable gripping device for gripping a leading edge of the sheet material for positioning same on the bed.
  • the gripping device may have a plate which is movable and is arranged to move upwardly to clamp the leading edge thereon when positioning the sheet material.
  • the plate may have a front edge with one or more pointed or curved sections forward of remaining sections of the front edge, and the one or more pointed or curved sections are arranged to make initial contact with portions of the leading edge of the sheet material before the remaining sections come into contact with the leading edge.
  • the one or more pointed or curved sections on contact with the portions of the leading edge, cause the contacted portions to initially bend and then relax to lie flat on said one or more pointed or curved sections. This arrangement prevents folding of the sheet material when clamped by the gripping device.
  • the gripping device is preferably controlled to lower its plate on the bed and move to slide under the leading edge of the sheet material and then to retreat a short distance before returning to clamp the sheet material.
  • the sheet material may be arranged in a roll form supported on rollers adjacent to the bed.
  • the sheet material can be a fabric or cloth.
  • the sheet material may include all kinds of synthetic and natural cloth as used for blinds, awnings, curtains, outdoor 'sails', shadecloth, or 'screen' cloth.
  • Figures 1 and 2 are respective schematic side and plan views of a frame of a laser cutting apparatus according to an embodiment of the process according to the present invention
  • Figure 3 is a schematic end view of the frame shown in Figure 1 ;
  • Figure 4 is an enlarged view of the laser head shown in Figure 3;
  • Figure 5 is a detailed cross-section view of the laser head and the bed of the embodiment of the apparatus shown in Figure 4;
  • Figure 6 is a schematic cross-section view of another embodiment of the laser head;
  • Figure 7 is a perspective view of a housing member for the laser head shown in Figure 6;
  • Figure 8 is an elevation of the laser head shown in Figure 6;
  • Figure 9 shows an embodiment of the crease wheels for the apparatus according to the present invention.
  • Figures 10 and 1 1 respectively show a side view and a plan view of a further embodiment of the apparatus according to the present invention
  • Figure 12 shows an embodiment of the gripping device for the present invention
  • Figures 13 and 14 show the steps in clamping the fabric
  • Figure 15 shows an application of an embodiment of the apparatus of the present invention for cutting a fabric cut into a pattern for a blind
  • Figure 16 shows another embodiment of the gripping device for the present invention. DETAILED DESCRIPTION OF THE DRAWINGS
  • FIG. 1 there is shown an embodiment of a frame 12 for a bed of a laser cutting apparatus 10 according to the present invention.
  • the bed frame 12 has a rectangular top frame portion 14 supported by spaced legs 16.
  • Supported on the frame 12 are a main control box 18 for a computer based control equipment, a laser coolant system 20, a power supply 22, a laser generator 24, a collimator arrangement 26 for collimating the laser energy from the laser generator 24, and a series of mirror assemblies 28 for directing the laser energy to a laser head 30 (see Figures 3 and 4).
  • the laser head 30 has a mirror arrangement 28 for directing the laser energy downwardly, and a lens assembly (not shown) for focussing the energy as a laser beam onto a sheet material 32 (see Figure 5) to be cut.
  • a vernier type adjuster 34 is provided to adjust the relative distance between the lens assembly and a laser nozzle 36.
  • the laser beam 42 is focussed to impart maximum energy onto a top surface 40 of the the bed frame 12.
  • the top surface 40 supports the sheet material 32 for cutting.
  • the sheet material is a fabric for making a blind.
  • the apparatus uses the principle of high air flow through the fabric and therefore applies a downward force on the fabric 32.
  • the support surface 40 is a plate with a pattern of small holes 44 in it.
  • the holes 44 form inlet ports of a vacuum chamber 46 and are such as to allow an appropriate volume of air to flow through the plate 40.
  • a hose 48 is connected to the chamber 46 and a suction machine (not shown) draws air through the holes 44 into the chamber 46 and the air is guided by the hose 48 to flow into the atmosphere.
  • the holes 44 are sized so as to allow creasing wheels 48 and 50 (see Figures 4 and 9) to travel over any one of them without damaging the fabric 32.
  • the creasing wheel profile is designed such as to minimise the pinch point effect by using either a shallow angle relative to the surface of approximately 20 degrees or a single or dual edge profile which prevents the wheels from ever fully entering the hole 44.
  • the wheels 48 and 50 have a single edge profile and as shown more clearly in the enlarged partial view they have a cylindrical main body 90 and an annular crease edge 92 around the circumference of the main body 90.
  • the crease edge 92 is configured with a depth extending from the outer periphery of the main body 90 and the depth is less than the thickness of the fabric 32.
  • the laser head 30 is controlled to heat the fabric 32 just ahead of the wheels 48 and 50 so that the deformation for the crease or scoring effect is more permanent and easier to form.
  • the apparatus 10 has another vacuum chamber 94 within a housing member 51 around the laser nozzle 36.
  • the vacuum chamber 94 is connected to a vacuum pump (not shown) by means of tubes 52 and 54.
  • the lower end of the vacuum chamber 94 in this embodiment has an opening and a vacuum nozzle plate 56 with apertures is supported in the opening.
  • the vacuum chambers 46 and 94 are arranged so that the fabric 32 is held in the position as shown except for a portion under the vacuum nozzle plate 56. That portion as shown, is lifted off the surface 40 by an air stream that is flowing into the vacuum chamber 94.
  • the differential between the air pressures in the two chambers is such that a small air gap 58 forms between the nozzle plate 56 and the fabric 32.
  • the laser nozzle 36 also has a tube 60 connected to allow compressed air to flow into the interior of the nozzle 36 and then out therefrom.
  • the arrangement of the two vacuum chambers eliminates smoke and heat damage to the fabric 32 by two processes. Firstly, a stream of air jet blasts the vaporised and burnt materials away from the underside of the fabric 32. Secondly, the vacuum in the chamber 94 and around the nozzle 36 assists in drawing away smoke from the upper side of the fabric and around the cut region. The lifting of the fabric 32 from the surface 40 provides a clearance underneath the fabric32 to allow smoke and debris to disperse downwards and not bounce back up onto the fabric 32.
  • the housing member 51 of the laser head 30 has a section which is shaped for a bowl shaped element 96 to be secured thereto. This section has an opening in alignment with said laser nozzle 36 so that the laser beam 42 can be directed through the opening onto the fabric 32.
  • the bowl shaped element 96 has a base 98 and a side wall 100 extending from the base 98.
  • the side wall 100 has a number of sets of aperture 106 and the base 98 has a mounting hole 102 for a screw 104 to enter therein for securing the element 96 to the hosing member 51.
  • the bowl shaped element 96 can be rotated about the screw 104 so that a set of the apertures 106 can be selected positioned under the opening in the housing member 51.
  • the rotating action moves the set of apertures 106 currently under the opening onto a surface of said housing member 51 and the interaction therebetween helps to clean any by-products gathered in and around that set of apertures 106.
  • the housing member 51 has spaced ball bearings 108 spring biassed to extend into bearing apertures 1 10.
  • the bias on the ball bearings 108 is overcome by applying a rotating force to the bowl shaped element 96. Accordingly, to select another set of apertures 106, one simply needs to apply a force of sufficient magnitude to turn the element 96 until the ball bearings 108 reenter the apertures 1 10.
  • the laser head 30 is mounted on a carriage 62 which is movably supported on a gantry 64.
  • the laser head 30 is arranged to move with the carriage 62 along the gantry 64 in a direction indicated as "Y".
  • the gantry 64 is movably supported on side rails 66 and 68 that are fixed to opposite sides of the bed frame 12.
  • the gantry 64 is arranged to move along the bed frame 12 in a direction indicated as "X”.
  • Attached to the lower part of the carriage 62 is a gripping device 70 for gripping to an edge of the fabric 32 for positioning a length of the fabric 32 onto the surface 40 for cutting.
  • a pair of rollers 72 and 74 are supported at an end of the bed frame 12 and a roll (not shown) of the fabric 32 is rotatably supported on the rollers 72 and 74.
  • the gripping device 70 as shown in Figure 12 has a lower movable plate 76 and an upper plate 78 mounted to the underside of the gantry 64.
  • the gantry 64 is controlled to proceed forward with the plate 76 pressed down on the surface 40.
  • the fabric 32 then slides up over the plate 76.
  • the fabric 32 does not behave in a consistent fashion and may catch on the front edge of the plate 76, for example if the fabric is curled down even though the edge of the plate 76 is sharpened in an attempt to prevent this.
  • the carriage 62 after having gone forward to pick up the fabric 32, then moves back a small amount of distance to allow the fabric 32 to relax, and to allow any catching to unhook, in doing so the fabric 32 flattens out over the plate 76.
  • the plate 76 then lifts up causing the fabric 32 to be clamped in a jaw like fashion between the upper plate 78 and the lower plate 76.
  • the fabric 32 is then pulled out over the surface 40 of the bed frame 12 or carried to the end of the frame 12 if the cutting operation is complete.
  • Figures 13 and 14 show a form of the lower plate 76 that is configured to substantially minimise curling or folding of the fabric 32 when contacting the lower plate 76 so that the leading edge of the fabric 32 would lie flat when this edge is gripped by the gripping device 70.
  • the lower plate 76 has a curved or wavy shaped front edge 1 10 extending across the bed 40.
  • the front edge 1 10 is knife edge shaped so as to minimise curling of the fabric 32 and also to guide the leading edge of the fabric onto the plate 76.
  • the plate 76 is lowered as shown in Figure 13 when gantry 64 is moving towards the fabric 32. As the gantry 64 moves, the plate 76 will come into contact with the fabric 32.
  • the initial contacts with the fabric 32 are made by the crest parts of the front edge 1 10.
  • the portions of the leading edge of the fabric 32 that are in contact with the crest parts of the front edge 1 10 would curl a little and then on further movement of the gantry 64, the plate 76 would move under the curled portions which would then relax and lie flat on the plate 76.
  • the remaining parts of the front edge 1 10 would in time come under the leading edge of the fabric 32 for gripping between the plates 76 and 78 by upward movement of the plate 76 as shown in Figure 14.
  • the curled portions are relative small area along the leading edge of the fabric 32, and these curled portions quickly relax and return to lie flat on the plate 76. Accordingly, the fabric is less likely to catch on the front edge 1 10 and the problem of gripping the fabric 32 while in a curled situation is substantially overcome by this form of the plate 76.
  • Figure 16 shows another form of the lower plate 76 for the gripping device 70.
  • the plate 76 is has a substantially straight front edge 1 10 and is arranged to be pivotal ly movable in a plane parallel to the bed 40.
  • the plate 76 is pivotal ly mounted and is rotatable about a pin 102.
  • the plate 76 is in position (a) in which it is oriented at angle so that only a corner of the leading edge of the fabric 32 is in contact of the front edge 1 10 during the initial contact.
  • the plate 76 is controlled to move through position (B) and to the clamping position (C). As shown the leading edge of the fabric is progressively guided to move onto the plate 76 starting from the corner in the initial contact with the edge 1 10.
  • the laser cutting operation is controlled so that the cut panel 80 remains connected to the trim around it by means of spaced links 84 as shown in Figure 15.
  • the panel 80 and the trim 82 can be transferred from the surface 40 in a single operation step.
  • the panels 80 and any trims 82 remain connected to one another by a series of small links 84 typically about 1 mm wide and spread at suitable intervals so that the pieces do not break away from each other after transport of the group begins, typically at 200 mm.
  • Separation of the cut panels 80 takes place by breaking the links manually, which by virtue of their small size, or by virtue of the fact that the link is partially cut by the laser (i.e. not fully through), they break apart with ease.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Laser Beam Processing (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

L'invention concerne un appareil de découpe au laser (10) servant à découper des feuilles de matériau. Cet appareil (10) comprend un bâti (12) pourvu d'une surface supérieure perforée (40) destinée à accueillir une feuille (32), un portique (64) s'étendant à travers le bâti et conçu pour se déplacer le long dudit bâti, ainsi qu'un chariot (62) conçu pour se déplacer le long dudit portique. Le bâti comporte un ensemble maintien (46 et 48) servant à maintenir la feuille en position sur le bâti. Ledit chariot comprend une tête laser (30) pourvue d'un ajutage pour laser (36) et conçue pour recevoir un faisceau laser (42) provenant d'une source laser et pour diriger ce faisceau laser à travers l'ajutage, vers le bâti pour découper la feuille. Un élément enceinte (52) comprenant une première chambre basse pression (94) est disposé autour de l'ajutage pour laser. Cette première chambre comporte une ouverture d'aspiration située sous l'ajutage pour laser et servant à entraîner une quantité importante de produits secondaires générés lors de la découpe de ladite feuille, dans ladite première chambre, ainsi qu'à soulever, de ladite surface supérieure, une partie de la feuille sous l'ouverture d'aspiration. Un couvercle autonettoyant (96) pourvu d'orifices espacés (106) peut être monté rotatif sur l'élément enceinte pour supprimer lesdits produits secondaires piégés dans les orifices sélectionnés (106). Le chariot peut comporter des roues profilées de rainurage (48, 50) servant à former des rainures de profondeur limitée dans la feuille. Le portique peut comporter un dispositif de préhension (70) conçu pour soulever, tout d'abord, une petite partie d'une arête avant de la feuille, puis progressivement le reste de cette arête avant, pour la déposer sur sa plaque inférieure.
EP03779580A 2002-12-19 2003-12-19 Appareil de decoupe au laser Withdrawn EP1599403A4 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AU2002953443A AU2002953443A0 (en) 2002-12-19 2002-12-19 A laser cutting apparatus
AU2002953443 2002-12-19
PCT/AU2003/001703 WO2004056685A1 (fr) 2002-12-19 2003-12-19 Appareil de decoupe au laser

Publications (2)

Publication Number Publication Date
EP1599403A1 true EP1599403A1 (fr) 2005-11-30
EP1599403A4 EP1599403A4 (fr) 2006-06-07

Family

ID=30004528

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03779580A Withdrawn EP1599403A4 (fr) 2002-12-19 2003-12-19 Appareil de decoupe au laser

Country Status (3)

Country Link
EP (1) EP1599403A4 (fr)
AU (1) AU2002953443A0 (fr)
WO (1) WO2004056685A1 (fr)

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US8379601B2 (en) 2007-08-16 2013-02-19 Motorola Mobility Llc Method and system for selective use of control channel element based implicit pointing
US9450727B2 (en) 2009-02-03 2016-09-20 Google Technology Holdings LLC Physical layer acknowledgement signaling resource allocation in wireless communication systems

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PL1853410T3 (pl) 2005-02-25 2012-01-31 Niklas Pettersson Zespół koła tnącego oraz bigującego, oraz sposób cięcia oraz bigowania materiału ściśliwego
US8299394B2 (en) * 2007-06-15 2012-10-30 Sv Probe Pte Ltd. Approach for assembling and repairing probe assemblies using laser welding
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