WO2016103211A1 - Système de retenue d'un verre de protection, machine laser munie dudit système de retenue et procédé de remplacement automatique d'un verre de protection - Google Patents

Système de retenue d'un verre de protection, machine laser munie dudit système de retenue et procédé de remplacement automatique d'un verre de protection Download PDF

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Publication number
WO2016103211A1
WO2016103211A1 PCT/IB2015/059931 IB2015059931W WO2016103211A1 WO 2016103211 A1 WO2016103211 A1 WO 2016103211A1 IB 2015059931 W IB2015059931 W IB 2015059931W WO 2016103211 A1 WO2016103211 A1 WO 2016103211A1
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WO
WIPO (PCT)
Prior art keywords
protective glass
housing
cover
protective
receptacle
Prior art date
Application number
PCT/IB2015/059931
Other languages
German (de)
English (en)
Inventor
David Broger
Original Assignee
Bystronic Laser 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 Bystronic Laser Ag filed Critical Bystronic Laser Ag
Priority to EP15825862.4A priority Critical patent/EP3237142A1/fr
Publication of WO2016103211A1 publication Critical patent/WO2016103211A1/fr

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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
    • B23K26/14—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
    • B23K26/1494—Maintenance of nozzles
    • 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
    • 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
    • B23K26/1488—Means for protecting nozzles, e.g. the tip surface
    • 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
    • B23K26/70—Auxiliary operations or equipment
    • B23K26/702—Auxiliary equipment
    • B23K26/706—Protective screens

Definitions

  • the invention relates to a holder for protective glasses of laser machines according to the preamble of claim 1, further a laser machine with at least one interchangeable protective glass according to the preamble of claim 14, and a method for automatically changing protective glass for at least one machining head of a laser machine according to the preamble of the claim 17th
  • the optical components of such laser machines are provided with a protective glass which on the one hand allows the laser radiation to pass unhindered and on the other hand protects the optical components against contamination-related wear.
  • the protective glass itself is exposed to these contaminants and therefore has to be replaced again and again in order to maintain a high and constant machining quality.
  • the change can be made manually or automatically.
  • DE 102004002839 A1 shows a protective glass changing unit for a laser optics for machining materials, which is arranged between an optical protective glass and the operating point. It has a housing with window openings for the laser beam, in which a rotating protective glass pane is arranged so that it covers the area of the window opening.
  • Protective glass pane can rotate continuously or intermittently, which should allow a high surface utilization of the protective glass pane.
  • a similar protective glass changing unit on a laser head is in the KR
  • 100634623 Bl discloses. This includes one container each for fresh and worn protective glass.
  • the containers are arranged in series, with the laser head in the middle.
  • the fresh protective glasses are stacked arranged in their container and at the height of the lower protective glass is a Linearverschie- unit for moving the bottom clean protective glass from the container into the laser head.
  • the worn protective glass is ejected from the laser head and reaches the container provided for this purpose. In the free fall in the container, the worn protective glasses can tilt.
  • the high weight of the laser head with attached protective glass containers is disadvantageous because there is no
  • a fresh protective glass is also fed horizontally to the laser head and at the same time the worn out protective glass is ejected.
  • the clean protective glasses are held in a glass holder and placed on a horizontal conveyor, wherein a plurality of protective glasses are stored on the horizontal conveyor spaced from each other.
  • a rotatable and longitudinally adjustable gripping device is arranged, which detects the respective front protective glass on the glass holder between clamping jaws and brings by rotation of the gripping device in a position for the protective glass change.
  • the laser head moves to the stationary gripper and in the course of this movement, the change of the protective glass on the laser head, while the soiled protective glass is ejected and removed.
  • the disadvantage in turn, a high space requirement and the equipment expense.
  • the open provision of the protective glasses can not reliably prevent their contamination from being introduced into the processing head.
  • the invention is an object of the invention to provide a holder for protective glasses of laser machines, in particular protective glass for a cutting head of a laser cutting machine, with at least one automatically replaced protective glass, which avoids the disadvantages of the prior art and in particular a low-motion and glass-conserving change of protective glass allows, which as long as and as safe as possible are protected against contamination, preferably even during the change process.
  • the holder should be as simple as possible and make the replacement without additional auxiliary devices and with simple antivirussab- runs possible.
  • the invention is based on a holder for at least one protective glass of laser machines, in particular for interchangeable protective glasses for a cutting head of a laser cutting system, which holder has at least one carrier and at least one receptacle for at least one protective glass.
  • the protective glasses are typically set in protective glass holders, the term "protective glass” being understood below to mean all possible designs with or without the protective glass enclosing frames, frames or similar components.
  • This protective glass is together with its socket for receiving in a holder of the holder
  • the protective glass or its socket is preferably provided with a structure for temporary or detachable coupling with a complementary structure of the machining head automatable exchangeability of the protective glass without elaborate Mechanism or even with the need to intervene by operating personnel ensured.
  • the support of the holder may at most be made open, for example, consist of a base plate mounted thereon with protective glass receptacles.
  • a protective glass tightly enclosing de housing-like cover is provided with at least one passage opening for receiving, wherein the housing-like Cover and the receptacle are mutually displaced so far that the protective glass can be made accessible, whereby a removal position is defined.
  • the protective glass is still largely protected in the removal position against contamination or damage, while the mutual displacement of housing-like cover and recording ensures a good automatable accessibility to the protective glass.
  • the housing-like cover can preferably be displaced passively against the action of a spring element relative to the receptacle.
  • This version contributes to the simple and easily automatable handling and removal of the protective glass.
  • the housing-like cover is displaced relative to a stationary protective glass receptacle or away from a removal position, the protective glass change can take place with little need for movement and preferably only through the machining head.
  • An alternative operation of the housing-like cover and / or the inclusion of actuators would be conceivable in order to divide the movements between machining head and protective glass receptacle or housing-like cover. This requires precisely defined, controlled motion sequences monitored by sensors.
  • a further inventive embodiment of the invention provides that the passage opening of the housing-like cover by a preferably passively operable closure assembly is sealed with at least one closure element and can be opened to the passage of the inclusion at the latest in the removal position by movement preferably substantially only in a plane substantially perpendicular to the passage opening.
  • the closure element itself can be designed arbitrarily, for example as a slide, flap, possibly also as a rubber lip or similar elastically deformable curtain.
  • the housing-like cover and / or the closure arrangement comprises an actuating element which is designed and positioned for coupling or actuation by a movable part of the laser machine.
  • the coupling to or actuation by the cutting head of a laser cutting machine is particularly preferred.
  • a particularly advantageous embodiment of the invention is characterized in that a housing enclosing this entire group with an opening, preferably in the form of a substantially completely open side wall, around a group of receptacles or a group of housing-like covers, each having an opening for the receptacle, is provided, and this housing and the receptacles are relatively movable relative to each other, that the receptacles come to rest outside the housing and such a removal position is defined.
  • This type of construction further increases the protection of the protective glasses provided from damage in the course of the laser processing operation a workpiece and pollution of these glasses prior to their insertion into the machining head.
  • the removal position preferably seen from above laterally next to the carrier and / or the receptacles for the protective glass ser, a possible housing and / or located in the open position cover, preferably spaced therefrom.
  • the removal position for an automated change operation of the protective glass is easily accessible without complicated handling equipment.
  • the accessibility is particularly simple due to a removal position, which is laterally spaced from the housing.
  • the opening of the housing can be closed by a cover and temporarily released, which of course further increases the pollution protection of the glasses.
  • the cover is designed in the form of a flap with a pivot axis, which is easy and safe to operate.
  • An advantageous embodiment provides a substantially horizontal pivot axis, which is preferably above the receptacles for the protective glasses, so that the gravity supports the closing movement and sealing effect. This also ensures that the cover flap is opened to open the magazine upwards and also protects the opening of the magazine in the open position from above falling dirt or dust.
  • a further improvement of the protection can be achieved by an embodiment in which in the closed position of the cover, the housing-like covers with their passage openings for receiving on the inside of the cover fit tightly.
  • An advantageous embodiment of the invention is characterized in that a group of receptacles are mounted on a common carriage or a common removable plate, wherein the carriage or the removable plate is motor-actuated through the opening of the housing in a removal position movable, preferably along a straight Web and preferably purely translational.
  • An inventive embodiment for a cover of the protective glass receptacle is characterized in that the housing-like cover at least one wall element which in a direction substantially perpendicular to the direction of relative movement of the housing-like cover and the receptacle against the remaining parts of the housing-like cover and against the receptacle is movable, wherein the movement of the wall element is preferably effected by an actuating mechanism which is released at the latest in the removal position or which is actuated by the movement of the receptacle in the removal position or which is operatively cooperating with a movable part of the laser machine, preferably the Cutting head of a laser cutting machine, designed and positioned.
  • This construction allows the receptacle and / or the protective glass to be completely enclosed until the exchange process so that the ingress of dirt into the interior of the cover and onto the protective glass is prevented.
  • the housing-like cover can rest completely and preferably positively and without play on the recording. Only when a relative movement of the housing-like cover and recording in the course of protective glass changing process is necessary, the housing-like cover is spread apart, so to speak, and can move freely and freely relative to the recording.
  • the portion of the housing-like cover, which faces in the removal position of the protective glass receiving element of the laser machine is formed complementary to the surface of this element, and preferably the passage opening for receiving with a sealing lip is surrounded. This also minimizes soiling of the protective glass during the change process, at least as far as possible.
  • the housing-like cover and / or the housing at least one permeable to a sensor device area, which are positioned in the observation direction between the sensor device and the protective glass.
  • the condition, in particular the contamination, of the protective glasses located in the receptacles can be determined in order to ensure, before a protective glass change, that on the one hand at least one receptacle is free for picking up the soiled protective glass from the machining head, and that provided for insertion into the machining head
  • Protective glass is also a clean or new protective glass.
  • a camera is provided as a sensor and areas of the housing-like covers or of the magazine are permeable to those wavelength ranges for which the camera is designed. If necessary, the sensor or the camera can be connected to the magazine or integrated in it.
  • the receptacles and / or the housing are pivotable about an axis between a rest position and a position for the protective glass change, wherein at least in the rest position a wall section of the housing or a cover dust-proofs the working area of the laser machine and preferably also sealed off from the recordings laser-tight.
  • the axis is oriented parallel to the working surface of the laser machine.
  • the holder or the female housing is equipped for interchangeable mounting on a laser machine.
  • the holder or the housing is preferably provided at a predetermined position or mounted on the laser machine.
  • an always identical removal position is ensured and the holder or housing are secured against undesired position changes, in particular with respect to overturning or falling from a support structure.
  • the holder, preferably the entire housing can be removed from the laser machine.
  • a laser machine with at least one replaceable protective glass in particular a laser cutting machine with at least one machining head, in particular a laser cutting head with at least one interchangeable protective glass.
  • each embodiment of a protective glass with a border, inserted in a frame, or the like is also included.
  • the machining head can be moved by means of a movement system, at least in one plane, essentially parallel to a work surface.
  • the machining head is associated with a holder for at least one protective glass of the laser machine, for which purpose it can preferably be detachably mounted on the laser machine.
  • the laser processing head can be moved by means of the movement system to a predetermined protective glass changing position.
  • such a machine is characterized in that the holder is designed in accordance with one of the preceding paragraphs and the protective glass changing position of the processing head is substantially adjacent to the removal position of the holder or a holder docked to the laser machine or if these positions overlap.
  • the movement system of the laser machine is preferably designed in such a way as to carry out the relative movements of the machining head, receptacles or covers and protective glasses required for the protective glass change.
  • the change process is greatly simplified, since on the side of the holder or the housing no elaborate movement and control devices must be provided, which at best should also be matched to movements of the machining head.
  • this laser machine is further characterized in that the machining head is designed for the direct automatic recording of a protective glass. As a result, any intervention on the part of the operator can be avoided and a fully automatic change process for the protective glass can be set up.
  • the machining head is preferably provided with a structure for coupling to a complementary structure of a protective glass.
  • the machining head in the protective glass changing position is movable by a small distance, at least in a plane parallel to the working surface and / or perpendicular to this plane, by means of the movement system.
  • a holder or a housing with such protective glass receptacles described above can also be a permanently mounted or integral component of a laser processing system.
  • the receptacles for the protective glasses are preferably arranged on a removable plate which can be connected to the carriage and is designed to be exchangeable. Instead of the entire magazine is then only the removable disk with the recordings arranged thereon and possibly their covers removed or re-equipped with clean protective glasses provided.
  • this also allows an independent and separate from the system assembly with new protective glasses or used protective glasses can be easily removed for cleaning or disposal.
  • a method for automatic replacement of protective glass for at least one machining head of a laser machine for solving the problems set out above.
  • This is particularly designed for protective glasses for laser cutting heads of a laser cutting machine and typically includes the steps of moving the machining head to or into a defined protective glass changing position and / or providing at least one protective glass in a picking position and the step of receiving the protective glass in the machining head.
  • Essential to the invention are the features that the machining head is moved to a protective glass changing position in the immediate vicinity, possibly overlapping with the removal position, after which required for the protective glass changes relative movements of machining head, recordings or housing-like covers and protective glasses by means of the movement of the machining head during the normal machining operation provided movement system as a defined sequence of movements parallel to the plane of the work surface and perpendicular to this plane are preferably carried out automatically.
  • a possible housing-like cover of a receptacle for a protective glass is preferably moved away against the action of an elastic element and preferably away from the removal position, whereby easy accessibility of the protective glass and good automation of the replacement process are ensured.
  • the machining head moves in the course of the change process to a housing-like cover, wherein preferably at least a dust-tight seal between the machining head and cover is made, and wherein by further method of the machining head in the direction of receiving the protective glass simultaneously box-like cover pushed away from the protective glass and the processing head is pushed over the preferably stationary remaining protective glass until the protective glass is received in the processing head provided for this purpose position.
  • the method is optionally also characterized in that the machining head is lowered in the protective glass changing position at least perpendicular to the work surface and at the same time or only subsequently moved towards the protective glass, wherein in the course of lowering the processing head a cover flap on the machining head for a Protective glass feed opening is opened automatically, preferably by concerns and along the lower edge of the cover on top of a cover of the protective glass. By covering any gaps or gaps upwards, the ingress of dirt into the machining head or to the protective glass to be used can be prevented from above.
  • a further advantageous embodiment of the method according to the invention is characterized in that, after moving the machining head into a position that receives the protective glass, the machining head is moved slightly at least in one direction perpendicular to the direction necessary for receiving the protective glass in the machining head.
  • the protective glass is fixed in the machining head, wherein preferably complementary coupling structures of the protective glass and the machining head are brought into engagement. Subsequently, the machining head is moved away from the recording again.
  • the movement of the protective glasses in the removal position and / or the movements of the machining head during the protective glass change substantially purely translationally and along preferably substantially straight tracks, which further enhances the effects and advantages mentioned in the previous paragraph. Moreover, so the protective glasses without complex equipment and the short ways can be transferred to the processing head very safe.
  • an opening in a housing of a receptacle for the protective glass receiving magazine and / or an opening before or during the movement of the protective glass in the removal position is automatically opened in a box-like cover of the protective glass or its recording.
  • a cover closing off the opening is preferably provided, which is moved about a pivot axis, which preferably lies substantially horizontally and preferably above the receptacle.
  • the tilted cover covers the protective glass, the opening and preferably also the path of the protective glass until it is received in the machining head at least upwards and thus prevents dirt, impurities and liquids coming from above from penetrating into the interior of the magazine.
  • the state of the protective glasses is determined and any change is carried out depending on the determined state and / or the state or the duration of use of the protective glass in the processing head and depending on the state of the protective glass in the receptacle.
  • the protective glass is preferably moved together with the receptacle and preferably with an exchangeable removable plate in a removal position, which seen from a direction normal to the plane of the work surface laterally next to the magazine and / or the opening of the housing and / or the open cover lies.
  • the removal position for an automated change operation of the protective glass is easily accessible without complicated handling equipment. Accessibility is particularly easy by moving the protective glasses a removal position, the side of the Ge housing is spaced.
  • the removable disk is preferably fitted or emptied after receiving soiled protective glass or before inserting a clean protective glass in the machining head separately from the magazine or the laser machine.
  • the method when the recording is moved together with a carrying carriage of a magazine in the removal position, and in which a housing-like cover of the recording is moved away from the removal position in the removal position.
  • this movement of the cover takes place against the action of an elastic element and preferably against the direction of movement of the recording when extending to the removal position and thus away again from the removal position, whereby the area between the removal position and protective glass changing position is kept very short and free of interfering components.
  • the movements of recordings, protective glasses, processing head and all interacting elements of the laser machine take place substantially purely translationally and along a preferably substantially straight path.
  • An essential feature of the method is therefore that, in the removal position, the machining head is at least temporarily brought into contact with the carriage, the magazine or the holder for the protective glasses in order to accomplish the replacement of the protective glass. In the course of the defined sequence of movements of the machining head this is preferably moved parallel to the plane of the work surface on the removal position and away from the removal position.
  • FIG. 1 shows an overview of an exemplary embodiment of a protective glass magazine according to the invention (upper cover surface omitted) and a laser cutting head (movement system omitted) in its protective glass changing position;
  • FIG. 2 shows a detailed view of the carriage and the receptacles for the protective glasses of the protective glass magazine of FIG. 1;
  • FIG. 3 shows a protective glass magazine according to the invention with the cover open in a perspective view from the direction of the protective glass changing position;
  • Fig. 4 the front part of the magazine for protective glasses of Figures 1 to 3 together with the located in the protective glass changing position laser processing head, both in longitudinal section. this position corresponds to the first step in a sequence of process steps for automatically removing a protective glass from a laser cutting head, with the laser cutting head in protective glass changing position and with the carriage in the protective glass changing position for receiving the protective glass from the laser processing head;
  • FIG. 5 shows the second step in the sequence of method steps for automatically removing a protective glass from a laser cutting head, with the laser processing head slightly lowered in the protective glass changing position;
  • 6 shows the third step in the sequence of method steps for automatically removing a protective glass from a laser cutting head, with the laser processing head still further lowered, the laser processing head being lowered almost entirely to the height of the receptacle of the magazine for the protective glass to be replaced; 7 shows the fifth step in the sequence of method steps for automatically removing a protective glass from a laser cutting head in which the laser processing head is moved in the height of the receptacle of the magazine for the protective glass to be replaced maximally in the direction of the magazine;
  • FIG. 8 shows the sixth step in the sequence of method steps for automatically removing a protective glass from a laser cutting head, in which the laser processing head for coupling protective glass receptacle in the magazine and protective glass is lowered even further;
  • FIG. 9 shows the seventh step in the sequence of method steps for automatically removing a protective glass from a laser cutting head, in which the laser processing head has again been moved away from the magazine, in order to extract the protective glass (partially shown here) from the laser processing head;
  • FIG. 10 shows the eighth and last step in the sequence of process steps for automatically removing a protective glass from a laser cutting head, in which the laser processing head moves even further away from the magazine into its position at the beginning of the protective glass replacement tray and completely covers the protective glass under the cover of the protective glass
  • the magazine has been taken, but not yet withdrawn into the magazine
  • FIG. 11 shows an embodiment for a cover which clampingly surrounds the protective glass receptacle in the closed position
  • FIG. and FIG. 12 shows a longitudinal section at the level of a side wall of the cover of FIG
  • FIG. 1 shows, as an example of a machining head K, a laser cutting head in a protective glass changing position P, which is typically approached for this specific sequence of steps.
  • This processing head K typically includes conventional laser optics in which a laser beam is guided, shaped, and focused on an operating point. Since when cutting resp. Welding Splashes and vapors that damage the laser optics or can at least pollute power-reducing, the laser optics protected by a protective glass S (see Fig. 5ff), which is typically taken in a protective glass frame 14. Splashes and vapors thus hit the protective glass S, which catches the dirt and therefore has to be replaced after some time. The replacement can be carried out in the inventive design of the protective glass, its holder and the laser machine itself preferably automatically and without influence or need for handling by the operator, as will be explained below.
  • a holder 1 which is preferably mountable with respect to the protective glass changing position P in its vicinity is arranged in the immediate vicinity, in particular laterally next to the protective glass changing position P.
  • the holder 1 is preferably an exchangeable mounted component of the processing system, in particular a laser cutting machine.
  • a possible housing 2 comprising this holder 1 can also be fixedly connected to the system or be an integral part of the laser processing system.
  • the housing 2 advantageously has a removable element, such as a removable plate 3a, on which the clean protective glasses S provided in receptacles provided or 10 removed from which from the processing head K after use, soiled protective glasses S and cleaning or disposal can be supplied.
  • the holder 1 or the receptacles 10 on the removable plate 3a can advantageously be filled or emptied away from the processing system, and ready-prepared holders 1 or exchangeable plates 3a can be kept ready for rapid attachment to the processing system or inside the housing 2.
  • the holder 1 and or the housing 2 could also be formed fixedly connected to the base or the base frame of the laser processing system. According to a preferred embodiment of a holder 1, this is pivotable between a rest position and a position for the protective glass change about an axis which is preferably parallel to the working surface of the laser machine, which is typically in the xy plane of the movement system of the machining head K, orientable.
  • the holder 1 can be pivoted from a position in which the receptacles 10 would make a movement substantially perpendicular to the working surface of the laser processing machine in a position for the protective glass change, in which the receptacles 10 are movable substantially parallel to the work surface.
  • An advantageous variant provides for the vertical mounting of the holder 1 or the housing 2 with the cover 5 facing upwards, which is pivoted into the change region for the protective glass replacement process.
  • the exchange of the brackets 1 or removable plates 3a by the operator takes place from 'behind' or from the side facing away from the processing head K in the swung-up position and is therefore also possible when the machine is running.
  • the vertically aligned bottom of the magazine 1 covers in the rest position the interior of the laser processing device vertically laser safe from the environment and at the same time ensures the protection of recordings 10 and the protective glasses S provided therein against contamination from the processing area.
  • As a further advantageous embodiment in the context of the invention could be integrated directly into the machine or the system for manual loading of the brackets 1 with protective glasses S a clean room.
  • brackets or similar structures may be provided, at least over a part of the necessary for an exchange path ensure a guided relative movement of the holder 1 or the removable plate 3a relative to the machine or the housing 2, so that the receptacles 10, the holder 1 and the removable plate 3a always and reproducibly reaches the same mounting position.
  • the located inside of housings 2 or in the region of the brackets 1 elements such as the removable plate 3 a can therefore also be exchanged directly without changing the holder 1 or the housing 2 as a whole.
  • a nozzle changer could also be provided in combination with the protective glass changing apparatus described here, and preferably both apparatuses could be integrated into a common unit.
  • the holder 1, possibly with surrounding housing 2 is preferably positioned in the edge region of the bearing surface for the workpiece to be machined or the working surface of the machining head K in normal machining operation. However, this position is still within the range of movement that the machining head K can move on when moving through the normal motion system that is also active during workpiece machining.
  • the processing head K is only brought to the protective glass change in its closest approach to the holder 1 and the housing 2.
  • the change station and the holder 1 or the housing 2 can be mounted in any desired and advantageous position in the system or on the machine. Among other things, it can also be mounted on the x-axis on large machines (where the x-axis does not necessarily have to match the cutting bridge).
  • the carriage 3 can, when the flap-shaped cover 5 is opened, are moved through the then released opening 6 preferably along a straight path on the outside of the housing 2, typically for approaching and towards the protective glass changing position P of the machining head K out.
  • Other embodiments for the shipment of preferably protected by housing-like covers 9 receptacles 10 are conceivable, preferably by pivoting the receptacles 10 in a removal position E near the protective glass change position P of the machining head K. This pivoting is preferably a lie substantially in the working plane of the laser processing machine ie in their X-Y plane, in which also the main movements of the processing head K take place.
  • the cover 5 of the housing 2 could be divided one or more times to only the respectively required receptacle 10 or group of receptacles 10, for example, from the housing 2 or in relation be able to extend to the holder 1 in the removal position E, so that penetration of dirt to the stationary to the holder 1 and to the remaining inside the housing 2 protective glasses S is avoided as possible.
  • a housing 2 also omitted and only a holder 1 may be provided with, for example, a base plate as a support for the movable components. Then the housing-like covers 9 for the holders 10 of the protective glasses S remain as the sole "housing" provided for individual or groups of protective glasses S.
  • the penetration of moisture and / or dirt into the interior of the housing 1 or into the interior of the housing-like covers 9 to the protection glasses S located in the receptacles 10 may preferably in addition to the mechanical protection by means of the cover 5 by generating overpressure in the interior of the housing-like covers 9 and the housing 2 are supported.
  • the housing 2 is provided with a coupling for the connection of a gas supply line or connected via a directly integrated into, for example, a cable drag line with a gas supply.
  • the gas may be the process gas used in the laser processing method, but could also be a different gas assisting the cleaning or keeping clean, possibly even compressed air.
  • the coupling with the gas supply can also be accomplished by contacting the housing 2 in the parked state on a block.
  • the separate supply of each receptacle 10 or each receptacle 10 housing-like surrounding housing-like cover 9 with a gas under pressure would be conceivable, in which case a clutch for these recordings 10 carrying carriage 3 would have to be made and the lines must be able to join their movement, what would have to be realized clean about a tow cable.
  • the cover 5 is preferably mechanically actuated and pivotable about a preferably overhead axis 7.
  • An example of a possible type of actuation are fingers connected to or formed on the carriage 3 which, when the carriage is extended, cover the cover 5 from the inside press and then support against a swiveling by the weight of the cover 5.
  • electrical, fluidic or other drives for the movement of the cover 5 could be provided.
  • Similar closure elements can also be provided for the housing-like covers 9, but here an embodiment is advantageous in which these closure elements are moved substantially in a plane perpendicular to the displacement movement of the protective glass S during the change process. This ensures a space-saving opening or closing movement of the housing-like covers 9, which can still take place even when the processing head K is already approached.
  • this opening and closing of the box-like covers 9 is effected by the processing head K itself in a passive manner in which an actuating element attached thereto actuates a corresponding actuator for the closure element of the box-like cover 9, when the processing head K with respect to box-like cover 9 is relatively moved.
  • this also applies to movement of the housing-like cover 9 with respect to a position in the protective glass changing position P held stationary processing head K, which would also be possible.
  • an active opening and closing of the housing-like cover 9 is also possible by means of arrangements actuated by motor or fluid by means of working cylinders.
  • closure elements for the housing 2 pivoting flaps 5 are preferably provided, while closure elements for the housing-like covers 9 will be designed rather as a slider or rubber lips.
  • a further possible embodiment also provides for the use of a closure element of the housing 2 as a closure element of the housing-like cover 9 at the same time. For this purpose, it is only necessary to position the housing-like covers 9 in the rest position within the housing 2 such that the closed cover flap 5 also closes the passage opening of the housing-like cover 9.
  • the movement of the carriage 3 in and out of the housing 2 of the magazine 1 is effected by preferably a fluidic working cylinder 8 (see in particular Fig. 2), but can possibly be accomplished by an electric drive or other drive system.
  • At least one housing-like cover 9 is arranged, preferably a plurality of housing-like covers 9 are present.
  • Each of these housing-like covers 9 in the form of preferably a hollow cuboid, at least with open front side, in each case at least one receptacle 10 (see FIGS. 2 and 4ff) for at least one protective glass S in order to protect it against soiling and damage as long as possible ,
  • the receptacle 10 may be conically shaped, on the one hand to provide a good seal within the housing-like cover 9 and still facilitate the pushing out of the receptacle 10 from the housing-like cover 9.
  • the housing-like cover 9 can preferably act against the action of a spring element 11 relative to the receptacle 10 be moved. This displacement advantageously takes place in the direction of the interior of the housing 2 of the holder 1, ie typically in the direction opposite to the direction of movement into the removal position E.
  • receptacles 10 for the protective glasses S these can be arranged in a horizontal arrangement as shown in the drawing figures or also vertically above one another. While the receptacles 10 can be moved together as a group in the removal position E in horizontal execution, advantageously vertically arranged receptacles 10 are individually and separately extended to cause no collisions of the laser processing head K with the housing-like covers 9, 10 shots or other parts of the magazine 1 ,
  • the carriage 3 and with it the receptacles 10 are preferably purely translational and without rotational components or pivotal movements in the removal position E for the protective glass - or a position in which a used protective glass S can be stored in the receptacle 10 - and in preferably straight path movable.
  • a receptacle 10 is free for depositing a soiled protective glass S from the processing head K or whether a protective glass S in a receptacle 10 is clean and for Insertion in the machining head K is suitable.
  • the protective glass changing process thus takes place depending on the determined state (free / occupied) of the receptacle 10 or a protective glass S (clean / dirty) located therein. Since the receptacles 10 are typically surrounded by a protective housing-like cover 9, the housing-like cover 9 and / or the housing 2 of the mounting 1 for a sensor device must have transmissive areas for this purpose.
  • a sensor device (not shown) can detect the relevant parts of the protective glasses S in order to determine their condition, in particular the pollution can.
  • the sensor device, the permeable region and the protective glass S or its receiving location are located in a straight direction, the observation beam of the sensor device.
  • a camera is provided as the sensor, this camera being mounted on the holder 1, on the housing 2 or in its vicinity or integrated therein.
  • a camera for this purpose which is fastened to the machining head K or integrated therein, for example in order to monitor the machining process.
  • the processing head K has already been moved by means of the movement system for the machining process into its protective glass changing position P, and in which also the carriage 3 with the receptacles 10 has been completely extended out of the housing 2 through the housing opening 6 and the receptacles 10 or the housing-like covers 9, the removal position E or in this case, the protective glass receiving position E have taken.
  • the housing 2 may be withdrawn relative to fixed receptacles 10. Of concern is only the mutual relative movement of recording 10 or housing-like cover 9 and holder 1 or housing 2 to make the receptacle 10 for the change process accessible.
  • the machining head K is preferably in its predefined protective glass changing position P by sole movement in an XY plane parallel to the work surface, possibly also by moving in the vertical direction.
  • the protective glass changing position P and the removal position E lie close to one another, lie adjacent to one another, as viewed from a direction perpendicular to the plane of the working surface, and may at most partially overlap.
  • a protective glass S from the receptacle 10 and its insertion into the processing head K takes place in principle in the reverse order to the steps explained below.
  • Fig. 4 it can be seen that at the beginning of the protective glass changing operation, the housing-like cover 9 for receiving 10 and the processing head K are arranged in the vertical direction to each other such that the protective glass S located in the processing head K is vertically offset from the receptacle 10, preferably Here is the lower, preferably slightly outwardly bent edge of a protective flap 12 of the insertion or removal opening 13 on the processing head K just above the top of the housing-like cover 9.
  • the protective flap 12 can also by motor, fluidic or alternatively, automatically actuated otherwise closure arrangements on the processing head K be replaced.
  • the head K In its protective glass changing position P, the head K can also be moved both vertically and horizontally by the movement and drive system of the processing system - the latter at least in a straight line towards or away from the holder 1, preferably in a purely translatory manner and along straight travel paths.
  • FIG. 5 shows an intermediate position in which it can be seen that lowering the machining head K causes the lower end of the protective flap 12 to be placed from above on the housing-like cover 9 and swung away from the latter when the machining head K is lowered, whereby the lower edge of the flap 12 slides along the box-like cover 9 to release the opening 13 through which the protective glass S can be removed from or inserted into the processing head K.
  • FIG. 6 shows the almost furthest lowered position of the processing head K in its protective glass changing position P in which the Opening 13 is located at the height of the receptacle 10 for the protective glass S.
  • the protective flap 12 is pivoted here the farthest.
  • the processing head K has already been approached by the movement and drive system of the laser machine in the horizontal direction of the magazine 1, so that its outer side rests against the housing-like cover 9 of the receptacle 10 for the protective glass S.
  • the lower end of the protective flap 12 slides on the top of the housing-like cover 9 even further towards the magazine 1 out.
  • the concern of the machining head K on the housing-like cover 9 is a certain seal against the penetration of contamination in the housing-like cover 9 and the processing head K guaranteed.
  • This effect can be further assisted by a complementary shaping of the outside of the machining head K and the front side of the housing-like cover 9 facing the machining head K and / or a gasket surrounding the passage opening of the housing-like cover 9 and / or the opening 13 of the machining head K.
  • a circumferential seal and thus optimum protection against the ingress of dirt into the opening 13 of the machining head K or on the protective glass S or into the interior of the housing-like cover 9 can be achieved.
  • the machining head K is then moved even further onto the magazine 1, onto the housing-like cover 9 and the receptacle 10, by means of its movement and drive system.
  • the receptacle 10 preferably remains stationary and its housing-like cover 9 is relative to the holder 1 or the housing 2 relative to said components or relatively by the processing head K relative to a carriage 3 and a removable plate 3a and preferably displaced against the action of a return spring or a similar elastic element 11.
  • the receptacle 10 is preferably attached to the end of a rod-shaped or profiled support, around which also preferably the return spring 11 is wound in order to prevent buckling thereof under pressure.
  • the receptacle 10 for the removal or insertion of a protective glass S is made accessible.
  • the further movement of the machining head K results in the receptacle 10 penetrating into the processing head K at a sufficient depth, pushing it over the receptacle 10 until the receptacle for the protective glass S has reached the protective glass S still located in the processing head K.
  • This mutual position of the housing 2, receptacle 10 and processing head K is shown in Fig. 7. All these movements can also be actively supported or completely actively effected via corresponding motor or fluidic drives, possibly in control engineering coordination with the movements of the processing head K.
  • any closure elements of the housing-like cover 9 are preferably passive by actuation means of Bear be opened head K, to free the passage opening for the receptacle 10 and the protective glass S.
  • a driver of the receptacle 10 can engage in a complementary structure on the protective glass S itself or its protective glass frame 14 or on a drawer for the protective glass S.
  • a further slight lowering of the machining head K relative to the receptacle 10 may be provided.
  • the engagement position with the furthest vertically lowered machining head K is shown in Fig. 8.
  • the processing head K is then moved again translationally and preferably horizontally away from the housing 2 of the magazine 1, preferably exclusively along a straight path parallel to the XY plane of the laser processing machine, which is now coupled to the receptacle 10 or therein inserted protective glass S is pulled out of the processing head K.
  • the housing-like cover 9 is also pushed back over the receptacle 10 by the action of the elastic element 11 until it finally encloses it again - and the protective glass S just removed from the processing head K - finally.
  • the protective glass S is preferably already pulled out completely in its frame 14 through the opening 13 from the processing head K.
  • the movement of the processing head K away from the receptacle 10 on the carriage 3 is continued until again a distance between the housing-like cover 9 of the removed protective glass S and the outside of the processing head K or the opening 13 is made, which is a vertical relative movement of housing 2 and machining head K without risk of damage.
  • the opening 13 and the gap between the processing head K and housing-like cover 9 always remain upwardly protected by the protective flap 12. This position is shown in FIG.
  • the processing head K is then moved further vertically.
  • the lower edge of the protective flap 12 slides along the upper side of the housing-like cover 9 and finally comes back completely to the machining head K in order to close off the opening 13.
  • the processing head K can be moved so far in the horizontal direction without vertical lifting until the distance to the housing-like cover 9 large This is as the length of the protective flap 12 and this therefore at most supported by spring elements in the opening 13 closing, the processing head K fitting position works.
  • the adoption of this position of the protective flap 12 may optionally be accomplished actively by drives.
  • the change process is performed mainly via the movement and drive system of the machining head K. This saves the installation of additional drives and is therefore less error-prone and less expensive.
  • the housing-like covers 9 and 10 may be kept open, need not be stored in a closed housing 2. In this case, the change process can be performed entirely by the processing head K. Since no carriage 3 has to be moved, any drive on the side of the protective glass magazine can here 1 savings and it can be found with the return spring 11 for the housing-like cover 9 Aus GmbH.
  • cleaning stations for the protective glasses S or - in the presence or integration of a nozzle changer - the nozzles could be integrated into the protective glass changer or the combined system.
  • a degree of contamination can be detected via a camera and the corresponding cleaning operation initiated.
  • a camera or a corresponding sensor can detect a marking or clearly identifiable characteristic of the protective glasses S and thus allocate certain protective glasses S or types of protective glasses S to specific work processes via downstream evaluation units and also initiate the changing process with selection of a specific protective glass S or required protective glass type. About such a mark could also be determined whether a protective glass S has already been replaced and the considered protective glass S still clean, cleaned after replacement and reusable or used and no longer usable.
  • This determination could also be made by an advantageously transparent cover of the housing 2 and / or the housing-like cover 9 preferably on the upper side via a particularly preferably attached to the laser processing head K or integrated camera, which also used in any case for the identification of the protective glass S or protective glass type becomes.
  • a transparent wall and / or a backlight source may or may not be present.
  • the protective glass change unit can exchange the entire nozzle stock without a lens.
  • the degree of contamination of the protective glass can be determined. This increases the degree of autonomy of the system.
  • An intelligent state recognition determines the location of the contamination and can therefore deduce the effects on the cutting quality.
  • the magazine solution inside the change station does not change the protective glass at the machine location.
  • the emptying and filling of the magazine takes place remotely. This facilitates the change and the magazine introduction and -dnähme is possible without lens contamination. This also allows easy, manual cleaning of the protective glasses.
  • the change process of the protective glass can be combined with an automatic removal of any protective film.
  • the protective film is removed by appropriate Abstreifan füren, by connecting the protective film to the recording, which automatically removes the film from the protective glass in protective glass removal, od. Like. Only removed from the magazine during the actual change by removing.
  • the advantage is that a priori contamination is avoided.
  • the protective glass changer except the extension of the receptacles 10 for the protective glasses S in the removal position no proper movement. If sufficient space was available, even this own movement could be avoided and the laser processing head K could even travel into the area of the holder 1 or be moved into a possible housing 2 for the receptacles 10.
  • the protective glass changing position P of the head K then lies within the housing 2 or the holder 1.
  • inventive protective glass changer are for example characterized by sealed housing-like covers 9 of the receptacles 10 for the protective glasses S, so that the holder 1 itself does not require any cover 5.
  • This embodiment is particularly advantageous combined with a gas supply to the individual receptacles 10 for generating an overpressure in the area.
  • damping elements may be attached or integrated therein to minimize impacts during the change process and when docking or undocking example of the laser processing head K or upon reaching the respective end positions ,
  • damping elements may be attached or integrated therein to minimize impacts during the change process and when docking or undocking example of the laser processing head K or upon reaching the respective end positions .
  • Such a function could be realized for example by appropriate control, in particular pressure reduction or appropriate adjustment of the pressure in the fluidic working cylinder 8 for the entry and / or extension of the carriage 3.
  • the largely funnel-shaped design of the protective glass holder 13 on the cutting head K is advantageous in order to reduce jamming or abutment of the protective glass S on or in the laser processing head K or to avoid.
  • the holder 1, the receptacles 10 and the protective glasses S or their frame itself are accordingly executed with rounded edges.
  • recordings 10 or entire complete mounts 1 for the reception of used protective glasses S so that the mixing of new, cleaned or used and possibly no longer reusable protective glasses S in one and the same holder 1 or one and the same housing 2 to avoid.
  • Preference is therefore also a separate receiving space for the removed from the laser processing head K protective glasses S, separated from the removal area E for clean and in the head K to be used protective glasses S.
  • a housing-like cover 9 which is displaceable as usual against the action of the spring 11, can be designed as shown in FIGS. 11 and 12. It consists of at least one substantially rigid wall element 9a, for example in the form of an upwardly open U-profile, and a relatively movable wall element 9b in the form of a lid on the U-profile.
  • the wall member 9b is movable in a direction substantially perpendicular to the direction of relative movement of the box-like cover 9 and the receptacle 10 (not shown in FIGS. 11 and 12) against the remaining parts 9a of the box-like cover 9 and against the receptacle 10.
  • the receptacle 10 is received in the interior of the U-profile 9a and held closed in the closed position of the wall element 9b (FIG.
  • the movement of the wall element 9b is preferably effected by an actuation mechanism consisting of the outer actuating lever 15a and the inner spreading lever 15b (see FIG. 12), which are non-rotatably mounted on a common axis.
  • the actuating mechanism 15a, 15b may be locked, wherein it is released at the latest in the removal position E (whether this is now actively approached or given only by exposing the housing-like covers 9).
  • the wall element 9b acting as a cover is acted upon by a spring 16 on the other wall element 9a out.
  • the actuating lever 15a Only upon actuation of the actuating lever 15a, which is preferably accomplished by contact with the machining head K or an actuating element attached thereto, is also the internal (FIG. 12) expansion lever 15b is correspondingly rotated and pushes the wall element 9b up against the action of the spring 16 and thus releases the inner receptacle 10 or permits its unimpeded displacement in the longitudinal direction of the receptacle 10.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Laser Beam Processing (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)

Abstract

L'invention concerne un système de retenue d'au moins un verre de protection (S) de machines laser, présentant au moins un support et au moins un logement (10) pour au moins un verre de protection (S). Le système de retenue est conçu pour être utilisé de préférence sur des verres de protection remplaçables (S) pour une tête de coupe (K) d'une installation de coupe au laser. L'invention vise à assurer une mise en place et un remplacement les moins salissants possible du verre de protection. À cet effet, un élément de recouvrement (9) en forme de boîtier qui entoure hermétiquement le verre de protection (S) est placé au moins autour de la partie de chaque logement (10) dans laquelle est logée le verre de protection (S). Ledit élément est muni d'au moins une ouverture de passage pour le logement (10), le dispositif de recouvrement (9) en forme de boîtier et le logement (10) pouvant être déplacés l'un par rapport à l'autre suffisamment loin pour que le verre de protection (S) soit rendu accessible, de sorte qu'est définie une position de prélèvement (E).
PCT/IB2015/059931 2014-12-23 2015-12-23 Système de retenue d'un verre de protection, machine laser munie dudit système de retenue et procédé de remplacement automatique d'un verre de protection WO2016103211A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15825862.4A EP3237142A1 (fr) 2014-12-23 2015-12-23 Système de retenue d'un verre de protection, machine laser munie dudit système de retenue et procédé de remplacement automatique d'un verre de protection

Applications Claiming Priority (2)

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EP14200022.3 2014-12-23
EP14200022 2014-12-23

Publications (1)

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WO2016103211A1 true WO2016103211A1 (fr) 2016-06-30

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106927257A (zh) * 2017-03-29 2017-07-07 中国科学院西安光学精密机械研究所 激光聚变靶场光学诊断设备的保护玻璃自动更换装置
US20210154767A1 (en) * 2018-08-24 2021-05-27 Panasonic Intellectual Property Management Co., Ltd. Laser light emission head and laser processing apparatus using same

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DE102004002839A1 (de) 2004-01-20 2005-08-11 Willer, Diana Schutzglaswechseleinheit (SGWE) Schutzeinrichtung für Laseroptik sowie Vorrichtung dazu
KR100634623B1 (ko) 2005-09-23 2006-10-16 현대자동차주식회사 레이저 옵틱 헤드용 보호유리 교환장치
KR100680830B1 (ko) 2005-11-09 2007-02-08 현대자동차주식회사 레이저 옵틱 헤드용 보호유리 교환장치
EP2078583A1 (fr) * 2008-01-12 2009-07-15 Trumpf Maschinen AG Dispositif mécanique destiné au montage et/ou au démontage d'une tuyère laser et machine de traitement laser dotée d'un tel dispositif mécanique
CN201988842U (zh) * 2010-12-24 2011-09-28 深圳市大族激光科技股份有限公司 一种光纤激光切割头
WO2014195022A2 (fr) * 2013-06-07 2014-12-11 Trumpf Werkzeugmaschinen Gmbh + Co. Kg Tête d'usinage pour machine d'usinage par laser ainsi que machine d'usinage par laser et procédé de remplacement d'un verre de protection dans la tête d'usinage

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004002839A1 (de) 2004-01-20 2005-08-11 Willer, Diana Schutzglaswechseleinheit (SGWE) Schutzeinrichtung für Laseroptik sowie Vorrichtung dazu
KR100634623B1 (ko) 2005-09-23 2006-10-16 현대자동차주식회사 레이저 옵틱 헤드용 보호유리 교환장치
KR100680830B1 (ko) 2005-11-09 2007-02-08 현대자동차주식회사 레이저 옵틱 헤드용 보호유리 교환장치
EP2078583A1 (fr) * 2008-01-12 2009-07-15 Trumpf Maschinen AG Dispositif mécanique destiné au montage et/ou au démontage d'une tuyère laser et machine de traitement laser dotée d'un tel dispositif mécanique
CN201988842U (zh) * 2010-12-24 2011-09-28 深圳市大族激光科技股份有限公司 一种光纤激光切割头
WO2014195022A2 (fr) * 2013-06-07 2014-12-11 Trumpf Werkzeugmaschinen Gmbh + Co. Kg Tête d'usinage pour machine d'usinage par laser ainsi que machine d'usinage par laser et procédé de remplacement d'un verre de protection dans la tête d'usinage

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106927257A (zh) * 2017-03-29 2017-07-07 中国科学院西安光学精密机械研究所 激光聚变靶场光学诊断设备的保护玻璃自动更换装置
CN106927257B (zh) * 2017-03-29 2023-04-11 中国科学院西安光学精密机械研究所 激光聚变靶场光学诊断设备的保护玻璃自动更换装置
US20210154767A1 (en) * 2018-08-24 2021-05-27 Panasonic Intellectual Property Management Co., Ltd. Laser light emission head and laser processing apparatus using same

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