EP2828030A1 - Système de dénudage de fil rotatif à laser - Google Patents

Système de dénudage de fil rotatif à laser

Info

Publication number
EP2828030A1
EP2828030A1 EP13764900.0A EP13764900A EP2828030A1 EP 2828030 A1 EP2828030 A1 EP 2828030A1 EP 13764900 A EP13764900 A EP 13764900A EP 2828030 A1 EP2828030 A1 EP 2828030A1
Authority
EP
European Patent Office
Prior art keywords
wire
assembly
roller
laser
wire stripping
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Withdrawn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
EP13764900.0A
Other languages
German (de)
English (en)
Inventor
Gregory B. Anderson
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.)
Control Laser Corp
Original Assignee
Control Laser Corp
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
Priority claimed from US13/829,401 external-priority patent/US20140280542A1/en
Application filed by Control Laser Corp filed Critical Control Laser Corp
Publication of EP2828030A1 publication Critical patent/EP2828030A1/fr
Withdrawn legal-status Critical Current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
    • B23K26/083—Devices involving movement of the workpiece in at least one axial direction
    • B23K26/0838—Devices involving movement of the workpiece in at least one axial direction by using an endless conveyor belt
    • B23K26/0846—Devices involving movement of the workpiece in at least one axial direction by using an endless conveyor belt for moving elongated workpieces longitudinally, e.g. wire or strip material
    • 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
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/03—Observing, e.g. monitoring, 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
    • B23K26/10—Devices involving relative movement between laser beam and workpiece using a fixed support, i.e. involving moving the laser beam
    • B23K26/103—Devices involving relative movement between laser beam and workpiece using a fixed support, i.e. involving moving the laser beam the laser beam rotating around the fixed 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
    • B23K26/36—Removing material
    • B23K26/361—Removing material for deburring or mechanical trimming
    • 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
    • B23K26/36—Removing material
    • B23K26/362—Laser etching
    • B23K26/364—Laser etching for making a groove or trench, e.g. for scribing a break initiation groove
    • 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
    • B23K26/36—Removing material
    • B23K26/40—Removing material taking account of the properties of the material involved
    • 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
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/02—Carriages for supporting the welding or cutting element
    • B23K37/0211—Carriages for supporting the welding or cutting element travelling on a guide member, e.g. rail, track
    • B23K37/0235—Carriages for supporting the welding or cutting element travelling on a guide member, e.g. rail, track the guide member forming part of a portal
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/12—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for removing insulation or armouring from cables, e.g. from the end thereof
    • H02G1/1275—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for removing insulation or armouring from cables, e.g. from the end thereof by applying heat
    • H02G1/128—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for removing insulation or armouring from cables, e.g. from the end thereof by applying heat using radiant energy, e.g. a laser beam
    • 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
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/32—Wires
    • 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
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/34—Coated articles, e.g. plated or painted; Surface treated articles
    • 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
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/36—Electric or electronic devices
    • B23K2101/38—Conductors
    • 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
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/16—Composite materials, e.g. fibre reinforced
    • B23K2103/166—Multilayered materials
    • B23K2103/172—Multilayered materials wherein at least one of the layers is non-metallic

Definitions

  • This invention is directed to a laser wire stripping system, and more particularly, a system which utilizes a rotating laser head to strip wires located across a large area.
  • a rotating laser wire stripping system removes insulation from wires, multi-conductor cables, or shielded cable by using the laser power to melt or ablate the insulation so that it can be pulled or peeled from the wire or cable.
  • a laser system has a single wire channel assembly which provides a pathway for allowing a laser light from a source to travel through the channel assembly to a cylindrical cavity in the channel assembly.
  • a collet is provided as a passageway for insertion of a wire into the cavity. The collet has an opening, which when the wire is properly inserted into the cylindrical cavity, is in alignment with the pathway allowing the laser light to travel to the wire in order to remove insulation from the wire.
  • a housing assembly holds the channel assembly and allows the channel assembly to rotate within the housing assembly about the wire.
  • a laser of appropriate wavelength such as a C0 2 laser may be used as the light source for stripping insulation.
  • the laser beam traces a path about the wire and melts lengths of insulation from the wire. Because the laser emits a light beam of about 10640 nm, the metallic core reflects the light and is unaffected by the laser beam as the laser melts the insulation. If the assembly is held stationary, a line may be drawn along the insulation to allow for peeling and stripping in that manner.
  • a one sized hole is formed in the collet which must be very close to the size of the wire or the wire will droop out of the focus of the laser beam.
  • the hole into which the wire is inserted has to be close to the actual size of the wire to be operated upon and the hole size for each collet is fixed.
  • the wire will tend to catch on the hole and the collet as the assembly spins around it at a high speed. If the wire is a multiconductor cable with a non-round shape, it is even more prone to this catching. This can tend to twist the wire while it is lasing to cause an uneven or unusable cut on the insulation.
  • the collet is interchangeable, a different sized collet must be switched in to accommodate each different sized wire; requiring a "library" of collets and slowing the stripping procedure.
  • the assembly contains the laser and the rotating channel assembly
  • the prior art systems take up work space, which is often scarce, at the wire stripping site. This adds to the expense and inefficiency of the worksite as two or more wire strippers could be placed in the footprint that the current prior art laser wire stripper requires.
  • the laser wire stripping system is immobile. This requires the wires to be brought to the wire stripper and inserted one at a time. This system is
  • a large sophisticated wiring harness 1 such as those utilized in the aircraft industry is provided. Because of the millions of wires required in sophisticated aircraft and spacecraft, it is practically impossible to wire the craft by hand in the craft itself. To accommodate such sophisticated and complex wiring needs, thousands of wires 1 2 corresponding to tens of thousands of feet of wiring are provided on a harness 10.
  • the harness 10 is placed into an aircraft for interconnection with related circuitry including other panels within the aircraft.
  • the wires 12 are placed into the harness 10 with full protected insulation thereon.
  • the ends of individual wires 14 are then stripped within harness 10 to provide maximum protection of the wire throughout the assembly process. Because of the high sensitivity of certain
  • a laser stripping system has a laser source for emitting a laser beam.
  • a wire stripping assembly for receiving a wire therein and directing the laser energy towards the wire when the wire is disposed within the wire stripping assembly is optically connected to the laser source by an optical conduit; light tube, or fiber optic.
  • the wire stripping assembly is freely moveable relative to the laser source.
  • the optical conduit is an optical fiber or light tube.
  • the laser source is disposed away from the wire stripping head, and in a preferred embodiment, the laser source is capable of movement in at least two directions along a plane. Furthermore, the wire stripping head may selectively direct the laser beam along a path which circumnavigates the wire.
  • the wire stripping assembly includes a fixed collet, an offset assembly includes a lens assembly for receiving the laser light and directing the laser light in a substantially perpendicular direction relative to an insertion axis of the wire.
  • the offset assembly is rotatably mounted relative to the collet to rotate 360 degrees about the axis of insertion of the wire.
  • the wire stripping assembly has an opening, a drive roller and an idler wheel are disposed at the opening to receive the wire.
  • the idler wheel may be biased towards the drive wheel and movable between a first position adjacent the drive wheel and a second position away from the drive wheel to accommodate different gauges of wire.
  • a clamp may be disposed within the assembly for holding the wire during the stripping process.
  • a sensor is disposed within the assembly for detecting the presence of a wire within the assembly.
  • FIG. 1 is a top plan view of a wire assembly disposed within a harness in accordance with the prior art
  • FIG. 2 is a block diagram of a wire stripping system constructed in accordance with the invention.
  • FIGs. 3 and 4 are views of a wire stripping head constructed in accordance with the invention.
  • FIG. 5 is a schematic diagram of a wire stripping assembly having a rotatable offset optical assembly constructed in accordance with the invention
  • Fig. 6 is a schematic diagram of a self-centering linkage for a wire stripping assembly constructed in accordance with the invention for enabling the operation on a variety of wire gauges;
  • Fig. 7 is a schematic diagram of an adjustable depth gauge for a wire stripping assembly constructed in accordance with the invention.
  • FIGs. 8a and 8b are a schematic diagram of a clamp and clamping process within a wire stripping assembly in accordance with the invention.
  • FIGs. 9a and 9b are schematic diagrams showing a support for a wire to be stripped within a wire stripping assembly, constructed in accordance with the invention.
  • Fig. 10 is a schematic diagram of a sensor disposed within a wire stripping assembly in accordance with the invention. DETAILED DESCRIPTION OF THE INVENTION
  • a laser source 102 includes a laser and the associated electronics as known in the art for creating a laser beam.
  • laser source 102 is a C0 2 laser source as known in the art, outputting a laser beam of about 10640 nm.
  • a hand held stripping assembly 104 is separate from the housing of laser source 1 02 and is optically connected to laser source 102 by an optical conduit 106 capable of transmitting the laser beam produced by laser source 1 02 to hand held wire stripping assembly 104.
  • Optical conduit 1 06 may be a light pipe, but in a preferred non limiting embodiment, optical conduit 106 is an optical fiber such as an AgCI:AgBr fiber manufactured by CeramOptec.
  • Hand held stripping assembly 104 is capable of free movement, i.e. movement in at least two directions relative to laser source 102.
  • Hand held wire stripping assembly 104 may be a rotating stripping assembly.
  • optical conduit 106 provides a laser beam input to wire stripping assembly 104.
  • Wire stripping assembly 1 04 has an insertion axis A along which a wire may be inserted into wire stripping assembly 104 for stripping.
  • Wire stripping assembly 104 includes at least one mirror which in a one mirror embodiment is disposed at a 45 degree angle to the path of the laser beam as input from fiber conduit 106.
  • This angled mirror reflects, or directs the laser beam substantially 90 degrees relative to the insertion axis A (corresponding substantially to the orientation of the wire within wire stripping assembly 1 04).
  • the mirror may rotate about insertion axis A keeping laser beam within the wire stripping assembly 1 04 at a constant substantially 90 degree orientation relative to insertion axis A throughout 360 degrees or more rotation about the wire.
  • the laser beam circumnavigates a wire disposed along axis A to melt a circular line of insulation to facilitate removal.
  • the mirror may be fixed and movement of the wire stripping assembly 104 relative to a wire disposed therein will cause removal of a line of material along the wire as a result of relative movement of the wire and the mirror.
  • the hand held device could be rotated about the wire manually or moved along the wire to provide a stripped line to allow peeling back of the insulation.
  • the wire may be moved in order to effect stripping.
  • Wire stripping assembly 1 04 includes a collet 120 for selectively holding a wire 122 therein allowing the wire to move into and out of wire stripping assembly 1 04 in the directions of double-headed arrow A.
  • Wire 122 lies along the axis of insertion and moves in the direction of arrow A substantially along the insertion axis.
  • a rotating optical assembly 130 is disposed within assembly 1 04 and rotates about insertion axis A in the direction of arrow B.
  • Rotating optical assembly 1 30 includes one or more mirrors for changing the direction of an incoming beam of laser light 137 output from a laser source such as laser source 102 transmitting to the wire stripping assembly 104 as described above.
  • At least one mirror is disposed within rotating optical assembly 130 to change the path and direction of the incoming laser beam 137 as it enters optical assembly 130; even as optical assembly 1 30 is rotating.
  • a first mirror 132 disposed at substantially a 45 degree angle relative to the axis of the incoming beam 1 37 receives the incoming laser beam 137 as it enters rotating assembly 130.
  • a second mirror 134 is disposed within rotating optical assembly 130 at an angle substantially 45 degrees relative to the travel path of laser beam 137 as it leaves first mirror 132.
  • a third mirror 136 is disposed within rotating assembly 1 30 downstream along the laser beam path from mirror 134 and is at a substantially 45 degree angle and directs the path of the laser beam 137 through an optical opening within rotatable assembly 130 to impinge axis of insertion A at an angle substantially perpendicular to the axis of insertion.
  • a focusing lens 138 may be disposed along the path traced by laser beam 137.
  • a three mirror embodiment is shown by way of example, but any number of mirrors which can deflect the laser beam towards the insertion access at an angle sufficient to perform ablation may be used.
  • Collet 120 is fixed relative to insertion axis A and optical assembly 130.
  • Optical assembly 130 may be supported on a rotating arm spindle or other type of linkage which rotates the optical assembly about axis of insertion A.
  • wire 122 is held by a stationary collet 120 as the assembly producing the laser light rotates relative to the insertion axis.
  • collet 120 can be better sized to have the right size opening to corresponding to the wire, as collet 1 20 no longer needs to spin around wire 122 or travel the distance of the laser beam travel. Therefore, collet 120 can be designed for greater tolerances.
  • Fig. 6 an embodiment of wire stripping assembly 104 having a self-centering and depth measuring assembly is shown.
  • a first wheel 140 and a second wheel 142 are provided at an insertion opening 1 10 of wire stripping assembly 104.
  • First wheel 140 is fixed in place, while second wheel 142 is moveable between a first position adjacent, or in contact with, wheel 140 and a second position away from wheel 140.
  • Wheel 142 is biased towards wheel 140. In this way, as a wire 122 is inserted along insertion axis A, it forces wheel 142 away from wheel 140 as it moves between wheels 140, 142.
  • a counter 144 such as an encoder, a motion sensor, or the like determines the amount of rotation of wheel 142. Knowing the rotation of wheel 142, counter 144, or a computer processor associated therewith, can determine in real time the depth to which wire 122 is inserted within housing 104. This results from the fact that a distance of rotation of wheel 142 corresponds to a length of wire 122 traversed.
  • a motor 146 may be operatively coupled to drive wheel 140.
  • wires may be ablated to a precise predetermined distance as determined by the amount of rotation of wheel 140 or 142 drawing wire 122 into laser assembly housing 104.
  • Motor 146 is a two directional motor so that rotation in a first direction inserts the wire into wire stripping assembly 104, and rotation in the opposite direction smoothly extracts wire 122 from wire stripping assembly 104 to control the fed rate for the slitting process. This eliminates differences between individual operators to provide consistency provided in the appropriate beam exposure time along wire 122 during the slitting process.
  • wheels 140, 142 may replace the function of collet 120, but may also be used in tandem with collet 120 positioned either upstream or downstream of collet 120 and still utilizing collet 120 as an additional support while allowing for the functionality described above of wheels 140, 142.
  • an alternative depth gauge may be used.
  • a mechanical depth gauge 1 50 having another structure to provide wire depth measuring is provided.
  • An adjustable depth gauge 150 is slideably mounted within wire stripping assembly 140.
  • depth gauge 150 may be mounted on optical assembly 130.
  • Depth gauge 1 50 is slideably disposed along insertion axis A; capable of moving between a first position proximate collet 120 to a second position away from collet 120 relative to the first position.
  • Depth gauge 150 may be positioned to the desired stripping depth substantially at any position along optical assembly 130. As shown in Fig.
  • a range finding detector by way of example, a range finding sensor 131 detects the relative distance between range finding sensor 131 and adjustable depth gauge 1 50.
  • range finding sensor may be an optical sensor, ultrasonic sensor, radio frequency detector or the like. The change in position of depth gauge 1 50 along the slide path is converted into a wire depth, as known in the art. In this way, the depth of insertion of wire 1 22, critical for determining the length of ablation, is determined even in the absence of the wheel assembly discussed above.
  • adjustable gauge 1 50 has a conically shaped receiving portion 152 for receiving the leading end of wire 122 and acts as a stop. Because of the conical shape of the receiving portion 152, as adjustable depth gauge rotates with optical assembly 130, adjustable depth gauge 1 50 centers wire 122 while maintaining it in position, without causing the wire to twist as a result of the rotation.
  • a clamp 150 is disposed within stripping assembly 1 04 along insertion axis A.
  • Clamp 1 50 is preferably mounted within fixed collet 120 and includes an anvil portion 154 having an area sufficient to support a wire 122 thereon.
  • Clamp 1 50 includes a pinching mechanism 156 capable of moving or extending towards insertion axis A a sufficient distance to press wire 1 22 against collet 120 is provided at a position within stripping assembly 104 at an opposed position relative to anvil portion 154 within collet 120 and across insertion axis A.
  • pinching mechanism 156 includes an extendable rod which moves from a first position away from anvil 156 to a second position towards anvil 1 54. It should also be noted, that any mechanical system capable of trapping, pinning, pushing or pressing, wire 122 within collet 120 may be utilized as pinching mechanism 156.
  • wire 122 is inserted along insertion axis A a predetermined distance as determined by the depth gauge as discussed above. Once travel has stopped, pinching assembly 154 clamps wire 1 22 to anvil 156 to maintain wire 122 in position during the ablation process.
  • the rotatable optical assembly 1 30 moves along insertion axis A to ablate the coating from the wire.
  • rotational optical assembly 1 30 may either rotate around axis B to ablate the entire wire or not rotate to slit the wire.
  • optical assembly 130 may operate as the wire is inserted along insertion axis A.
  • a wire to be stripped is not straight because of bending or drooping and therefore, the wire avoids the focal point of the laser beam as the laser beam moves about and along insertion axis A, or when in the slitting mode, traces a straight line; missing any bends in the wire.
  • Figs. 9a and 9b wherein a structure for ablating the wire while accommodating bends in the wire 122 is provided.
  • Stationary collet 120 supports a wire 122 within assembly 104.
  • An optical assembly 230 directs a beam to a focal point along an insertion axis of wire 122.
  • optical assembly 230 is the same as optical assembly 130, including the necessary mirrors and optics to direct a beam as taught above. The primary difference being the inclusion of a support 206 mounted to optical assembly 230.
  • Support 206 includes a channel 208 therein for receiving and supporting a wire 122.
  • Channel 208 has a radius sufficiently large so as not to twist wire 122 disposed therein while rotating.
  • optical assembly moves in the direction of Arrow A relative to wire 122. This is done by the movement of optical assembly 230. Because wire 122 is supported within channel 208, channel 208 will straighten/remove-droop in wire 122 as support 206 moves in the direction of Arrow A. Support 206 is substantially adjacent the focal point of exiting laser beam 137. Substantially adjacent means for the purposes of this invention, close enough such that the support provided by support 206 to drooping wires straightens the wire sufficiently to place the wire 122 at the focal point of laser beam 137 as optical assembly 230 moves along insertion axis A as wire 122 moves relative to channel 208.
  • support 208 is disposed upstream of the laser path in the direction of Arrow A as wire 122 is straightened prior to be being ablated by laser beam 137.
  • a drooping wire may be slit (optical assembly 230 does not rotate during movement) or ablated (optical assembly 230 rotates during movement in the direction of Arrow A); even a crooked wire 1 22 is properly stripped.
  • the diameter of channel 208 is critical in that it must be sufficiently sized to provide support to wire 1 22, it is sufficiently large that rotation of support 206 about wire 122 will not twist wire 122 when disposed within channel 208.
  • Laser beam 137 exits optical assembly 1 30 at an exit point 135.
  • Exit point 135 may be a transparent portion of assembly 130, or a physical opening.
  • air can be supplied through a spindle at an entry point to optical assembly 130 in the direction of Arrow C.
  • it is substantially the same path as laser beam 132 through optical assembly 130 to provide a positive air pressure within optical assembly 130.
  • the pressure is between 1 to 10 psi.
  • the optical assembly 130 is a self-contained sealed optical assembly; as a result no sealing of the other elements of the wire strip assembly is required. The optics are protected.
  • a collet 220 includes an access point 222 which provides access to wire 122 as it is inserted through the collet.
  • a presence detector sensor 224 is disposed at access point 222 to sense the presence or absence of wire 122 within collet 220. Because collet 220 is fixed in the present invention, only a single sensor which may be formed as part of the collet or separately, is required.
  • the focused laser beam energy melts, ablates or vaporizes the insulation.
  • the appropriate laser power and the correct number of rotations (as a function of power, laser frequency and insulation type and thickness) removal of a ring of insulation without damaging the wire, shielding or inner material can be accomplished. Additionally, if the wire is slowly separated from the wire stripping mechanism, and the wire stripping mechanism is the rotational wire stripping
  • the focused beam may be directed from a starting point to the end of the wire as rotation continues so that the entire insulation may be removed without the need for manual removal of any insulation. If a non-rotation mode or non-rotating wire stripping assembly is utilized, if the wire is slowly separated from the focused beam along the insertion axis A such that the focused beam is directed from a starting point to the end of the wire, then a slit from the starting point to the end of the wire may be cut in the insulation facilitating removal of the stripped insulation.
  • laser source 1 02 is positioned away from the work area either above or below the work area for laser assembly 104. This frees up work space to accommodate large harnesses having many wires (scores or even hundreds) to be stripped, or several devices working side by side. In a preferred embodiment, to accommodate large work areas such as are necessary for assembly of harness 10.
  • system 100 includes a slide 108 moveable in the direction of at least arrow X to move along harness 10 to access the wires 14 of wire assembly 12 which require stripping or even mounted to a movable cart.
  • slide 108 is moveable in the X and Y directions so that laser source 1 02 may traverse along a plane to enable access of the wire stripping assembly 104 to substantially any spot on the work space presented by harness 10.
  • a so-called zero gravity arm 1 10 provides support for wire stripping assembly 104 from slide 108 to maintain wire stripping assembly 104 in a position at a distance above the work area, but within easy access to a user.
  • the stripping assembly in a fixed collet and a rotating optical assembly lends itself to both a table mounted embodiment and the hand-held embodiment of system 100. Furthermore, by holding the rotating optical assembly still and moving the optical assembly along insertion axis A, the wire may be slit utilizing a fixed collet. Conversely, by rotating the optical assembly utilizing the fixed collet, the outer casing of the wire may be ablated while still allowing for a simpler sensor assembly, a simpler construction, and the like.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Removal Of Insulation Or Armoring From Wires Or Cables (AREA)
  • Laser Surgery Devices (AREA)
  • Laser Beam Processing (AREA)

Abstract

L'invention porte sur un appareil de dénudage de fil à laser comprenant une bague ayant un passage destiné à recevoir intérieurement un fil, selon un axe d'insertion, la bague étant fixe en position par rapport à l'axe d'insertion, une source laser destinée à produire un faisceau laser, un ensemble optique, l'ensemble optique se déplaçant par rapport à la bague et à l'axe d'insertion pour projeter un faisceau laser le long de l'axe d'insertion dudit fil.
EP13764900.0A 2012-03-21 2013-03-20 Système de dénudage de fil rotatif à laser Withdrawn EP2828030A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201261613565P 2012-03-21 2012-03-21
US13/829,401 US20140280542A1 (en) 2013-03-14 2013-03-14 Social competition engine
PCT/US2013/033086 WO2013142566A1 (fr) 2012-03-21 2013-03-20 Système de dénudage de fil rotatif à laser

Publications (1)

Publication Number Publication Date
EP2828030A1 true EP2828030A1 (fr) 2015-01-28

Family

ID=49223315

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13764900.0A Withdrawn EP2828030A1 (fr) 2012-03-21 2013-03-20 Système de dénudage de fil rotatif à laser

Country Status (5)

Country Link
EP (1) EP2828030A1 (fr)
JP (1) JP2015518364A (fr)
CN (1) CN104334314A (fr)
CA (1) CA2867704A1 (fr)
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3447865A1 (fr) 2017-08-23 2019-02-27 Komax Holding Ag Procédé d'enlèvement d'une partie d'une feuille écran d'un habillage de câble de ligne et dispositif d'enlèvement des feuilles permettant l'enlèvement d'une partie d'une feuille écran d'un habillage de câble de ligne à un point de rupture de l'habillage de câble de ligne

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CN104334314A (zh) 2015-02-04
JP2015518364A (ja) 2015-06-25
CA2867704A1 (fr) 2013-09-26

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