WO2014162145A1 - Machine de découpe au laser - Google Patents

Machine de découpe au laser Download PDF

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Publication number
WO2014162145A1
WO2014162145A1 PCT/GB2014/051055 GB2014051055W WO2014162145A1 WO 2014162145 A1 WO2014162145 A1 WO 2014162145A1 GB 2014051055 W GB2014051055 W GB 2014051055W WO 2014162145 A1 WO2014162145 A1 WO 2014162145A1
Authority
WO
WIPO (PCT)
Prior art keywords
laser cutting
cutting machine
stencil material
machine according
stencil
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.)
Ceased
Application number
PCT/GB2014/051055
Other languages
English (en)
Inventor
James Graham Hall
Fraser Murray SHAW
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.)
Tannlin Technology Ltd
Original Assignee
Tannlin Technology Ltd
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 Tannlin Technology Ltd filed Critical Tannlin Technology Ltd
Publication of WO2014162145A1 publication Critical patent/WO2014162145A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • B23K26/08—Devices involving relative movement between laser beam and workpiece
    • B23K26/0823—Devices involving rotation of the workpiece
    • 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
    • B23K26/08—Devices involving relative movement between laser beam and workpiece
    • B23K26/0869—Devices involving movement of the laser head in at least one axial direction

Definitions

  • the present invention relates to a laser cutting machine.
  • the present invention relates to a two-axis laser cutting machine, comprising a linear axis and a theta axis.
  • Laser cut stencils are in principle no different to any other two-dimensional laser cut part. A pattern comprising holes is retained and the cut-out pieces, forming the holes are discarded. Movement of the laser cutting head is increasingly carried out by linear actuators.
  • An example of a conventional stencil cutting machine is a combination axis machine that comprises a stationary cutter and moving axes, generally in two directions. The movement is designed in lower and upper axes. Such a machine is generally heavy and results in offset loads, which means that the acceleration is inconsistent and mechanical response can be irregular depending on the relative axes position.
  • a conventional stencil cutting machine is a split axis machine, where the cutter moves along one axis and the stencil material is moved along a second axis.
  • the split axis machine demonstrates more uniform loading.
  • the scale and size of the split axis machine can be much greater than the combination axis machine because the stencil material can be fed in large sheets, which therefore must be supported and transported during the cutting process.
  • Movement of the stencil material and the cutter may also present problems during laser cutting because the motion components associated with the moving stencil material may be affected by laser spatter and as such protection of the motion components, that are generally on the underside of the sheet, is required. Due to the high accuracy required by the cutting process the stencil material needs to be supported and held in tension sufficiently whilst the material is cut to ensure accuracy of the pattern to be cut in the material. As such, often a complex and heavy support arrangement is required for the stencil material which can affect the mechanical response.
  • a further example of a conventional stencil cutting machine is a gantry design, where the stencil sheet is held stationary and the cutter is supported and movable, relative to the stencil material, with a gantry.
  • the cutter is arranged to move in both the x and y axes. To achieve the desired movement two or three linear actuators are used.
  • Tannlin TXPROi laser stencil machine utilises three linear motion stages - each comprising a motor, a linear bearing and a linear scale, with sub- micron linear measurement to form part of a linear actuator control loop.
  • motion is defined by X, Y and YY axes.
  • the YY axis acts as a slave to the Y axis to ensure that the entire movement envelope is possible with minimum inaccuracies.
  • the close coupled system where motion and measurement are as close together as possible minimizes errors in the cutting process.
  • a gantry design needs to achieve high speed and high accuracy and generally has a movement envelope of at least 600mm by 600mm.
  • the stencil material used with the machines is thin, generally less than 0.15mm thick and the tendency, therefore, is easy damage of the material if not sufficiently tensioned.
  • the material can be frame mounted foil, where the frame tensions the foil [stencil material] for cutting.
  • the machine may comprise an integral/built-in tensioning mechanism operable to apply sufficient tension to the foil.
  • the present invention provides a laser cutting machine comprising: a laser cutting head movable along a linear axis; a stencil material mount configured to rotate about an axis substantially parallel with the linear axis; wherein the stencil material mount is configured to receive stencil material in a substantially cylindrical form.
  • the linear axis may be substantially horizontal, an x-axis.
  • a laser cutting machine operates on a two axis system, where the first axis is linear, for example, an x-axis and the second axis is rotational or angular, also known as a theta axis.
  • the resulting laser cutting machine has a smaller footprint than conventional machines and also provides improved ability to achieve, consistently, accurately cut stencils because the number of effective moving axes is reduced.
  • a laser cutting machine according to the present invention provides a reduced moving mass and reduced alignment and cross coupling errors.
  • the machine may further comprise a gantry arrangement, comprising substantially vertical support members and a substantially horizontal member, where the horizontal member facilitates the translational linear movement of the laser cutter.
  • the horizontal member may comprise one or more rails.
  • the laser cutter may be configured to move along the rails.
  • Each rail may be substantially parallel to the rotational axis of the stencil material mount.
  • the stencil material mount may comprise a rotating member configured to receive stencil material pre-formed as a partial cylinder or a complete cylinder. As such the machine according to the present invention does not require tension and/or sheet supports because a coiled sheet of stencil material becomes strong and stable when it is formed into a cylinder or partial cylinder.
  • the sheet material may be a single or partial coil comprising one or less rotations of sheet material
  • the stencil material mount may comprise one or more structural members to which stencil material is attachable.
  • the stencil material may comprise inherent spring properties, which act to bias the cylinder to a planar sheet form. Therefore, the natural bias provided by the planar sheet being shaped in a cylindrical form means that the sheet will tend to straighten and therefore shall act to force the material outward against a restraining member.
  • the restraining member may be provided as part of the structural member. The restraining member may provide a fixed datum thereby providing a substantially constant radius such that the relative position of the laser cutting head and the stencil material is maintained constant and the linear movement of the laser cutting head relative to the rotary movement of the stencil material is constant and accurate cutting is assured.
  • the stencil mount may comprise structural members to which a cylindrical frame is attachable, wherein the cylindrical frame includes stencil material.
  • the structural member may comprise a removable clamping device arranged to clamp the cylindrical frame, wherein the stencil material, as described above, is configured in a forced cylindrical form including inherent spring properties.
  • the stencil material may bias towards a restraining edge Additional means of force to push the material outwards clamping to the restraining means providing the datum edge.
  • the additional means of force may be provided by a bladder.
  • Figure 1 illustrates a schematic representation of a laser cutting machine according to an embodiment of the present invention.
  • the machine 10 includes a drum arrangement 12, wherein the stencil material (foil) 14 is wound to a cylindrical form and fitted between two support members 16.
  • the support members 16 and the stencil material 14 are arranged to rotate about a horizontal axis, which maintains the stencil material 14 in parallel to the axis of movement of a stencil cutting tool 20.
  • the distance between the cutting tool 20 and the stencil material 14 can therefore remain constant during the cutting process.
  • the machine 10 is a "gantry" design where the cutting tool 20 is located above the stencil material 14.
  • the machine 10 includes two vertical support members 24 and a horizontal member 26 that spans across the machine 10 above the rotating stencil material 14.
  • the vertical support members 24 also support a mechanism 28 that facilitates rotation of the stencil material 14.
  • the horizontal member comprises two rails 30, 32 along which the cutting tool 20 moves.
  • Two rails 30, 32 are provided such that linearity and spacing between the stencil material 14 and the cutting tool 20 remains consistent and the risk of the tool 20 jamming is substantially removed.
  • the combination of translational movement 34, of the stencil cutting tool 20, and rotational movement 36, of the stencil material 14, provides a laser cutting machine that operates efficiently on two axes, an x-axis and a theta-axis. It will be appreciated that the machine may only require two motors, one linear and one rotary; therefore bandwidth of the axes control is improved compared with known machines.
  • the design may use two rotational actuators requiring less precision than conventional linear actuators, which are generally separated by up to 1 metre and require a very large high precision structure on which to mount the linear actuators.
  • the rotational actuators may have a diameter as little as 250mm and may be mounted on housings as small as 100mm.
  • the laser cutting machine 10 provides a machine 10, presenting a large reduction in cross coupling errors compared with conventional designs and therefore presents increased bandwidth of the laser cutting system.
  • the stencil material 14 is in the form of a cylinder. In the cylindrical form the stencil material 14 is for example loaded into a chuck or clamping device 16 before inserting the material into the machine 10 and locating it between the rotational actuators 28.
  • the inherent spring properties of the stencil material 14, in a cylindrical form, means that the stencil material 14 will be biased towards its normally planar, straight configuration therefore, when inserted in the chuck the inherent spring force will act to push the material against the clamping device or supporting structure 16.
  • An alternative arrangement is where the stencil material 14 includes slots which engage with grooves in the support structure to secure the stencil material in the machine 10.
  • the cylindrical form of the stencil material 14 and the effective clamping arrangement results in the stencil material forming a uniform radius about the rotational axis. Therefore, the distance between the stencil material 14 and the cutting tool 20 is substantially constant.
  • the stencil material 14 may be formed as a complete or partial cylinder comprising one or less turns of material.
  • the cutting tool 20 is a laser, which may be a conventional fibre delivered/fibre laser.
  • the cutting tool, including the laser and focus optic are arranged to move translationally along a horizontal axis, which is parallel to the rotational axis of the stencil material 14. Whilst specific embodiments of the present invention have been described above, it will be appreciated that departures from the described embodiments may still fall within the scope of the present invention.

Landscapes

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

Abstract

L'invention concerne une machine de découpe au laser (10) comprenant une tête de découpe laser (20) mobile le long d'un axe linéaire et un support de matériau de pochoir (16), configuré pour tourner autour d'un axe sensiblement parallèle à l'axe linéaire. Le support de matériau de pochoir (16) est configuré pour recevoir le matériau de pochoir sous une forme sensiblement cylindrique
PCT/GB2014/051055 2013-04-05 2014-04-04 Machine de découpe au laser Ceased WO2014162145A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB201306156A GB201306156D0 (en) 2013-04-05 2013-04-05 Laser Cutting Machine
GB1306156.9 2013-04-05

Publications (1)

Publication Number Publication Date
WO2014162145A1 true WO2014162145A1 (fr) 2014-10-09

Family

ID=48483379

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2014/051055 Ceased WO2014162145A1 (fr) 2013-04-05 2014-04-04 Machine de découpe au laser

Country Status (2)

Country Link
GB (1) GB201306156D0 (fr)
WO (1) WO2014162145A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108372559A (zh) * 2018-02-26 2018-08-07 吴士妹 一种异形板材切割装置
CN109732224A (zh) * 2019-01-31 2019-05-10 浙江永强集团股份有限公司 一种户外家具管材全自动切割装置
WO2020212687A1 (fr) * 2019-04-15 2020-10-22 Tannlin Technology Limited Appareil d'usinage de précision

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4806727A (en) * 1985-02-12 1989-02-21 Schablonentechnik Kufstein Gesellschaft M.B.H. Apparatus for producing a screen printing stencil
EP1460165A1 (fr) * 2003-03-16 2004-09-22 MATEC S.p.A. Dispositif pour la production de vêtements à partir de tricots tubulaires et procédé de production
US20070125756A1 (en) * 2003-02-10 2007-06-07 Kelly William G Method of making topographical support members for producing apertured films

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4806727A (en) * 1985-02-12 1989-02-21 Schablonentechnik Kufstein Gesellschaft M.B.H. Apparatus for producing a screen printing stencil
US20070125756A1 (en) * 2003-02-10 2007-06-07 Kelly William G Method of making topographical support members for producing apertured films
EP1460165A1 (fr) * 2003-03-16 2004-09-22 MATEC S.p.A. Dispositif pour la production de vêtements à partir de tricots tubulaires et procédé de production

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108372559A (zh) * 2018-02-26 2018-08-07 吴士妹 一种异形板材切割装置
CN109732224A (zh) * 2019-01-31 2019-05-10 浙江永强集团股份有限公司 一种户外家具管材全自动切割装置
CN109732224B (zh) * 2019-01-31 2024-03-19 浙江永强集团股份有限公司 一种户外家具管材全自动切割装置
WO2020212687A1 (fr) * 2019-04-15 2020-10-22 Tannlin Technology Limited Appareil d'usinage de précision
GB2583099B (en) * 2019-04-15 2023-12-27 Tannlin Tech Limited Precision laser machining apparatus

Also Published As

Publication number Publication date
GB201306156D0 (en) 2013-05-22

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