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
  • B23K26/36—Removing material
  • B23K26/38—Removing material by boring or cutting
• • 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
• • 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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
  • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
  • B23K26/08—Devices involving relative movement between laser beam and workpiece
  • B23K26/0869—Devices involving movement of the laser head in at least one axial direction
  • B23K26/0876—Devices involving movement of the laser head in at least one axial direction in at least two axial directions
• • 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
• • 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 for a procedure covered by only one of the other main groups of this subclass
  • B23K37/04—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass for holding or positioning work
  • B23K37/0408—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass for holding or positioning work for planar work
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
  • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
  • B26D1/56—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter
  • B26D1/60—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter and is mounted on a movable carriage
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
  • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
  • B26D1/56—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter
  • B26D1/60—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter and is mounted on a movable carriage
  • B26D1/605—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter and is mounted on a movable carriage for thin material, e.g. for sheets, strips or the like
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
  • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
  • B26D7/20—Cutting beds
  • B26D2007/206—Cutting beds having a travelling gap

Definitions

• the invention relates to a device for cutting sheet metal blanks from a sheet metal strip according to the preamble of claim 1.
• Such a device is known from DE 10 2004 034 256 A1.
• a dust discharge shaft is provided in a direction away from a laser cutting device discharge, to which a dust collection container is attached.
• the dust discharge chute and the dust collecting container attached thereto are moved in unison with the laser cutter for discharging and catching cutting dust resulting from laser cutting of sheet metal.
• DE 10 201 1 051 170 A1 discloses a workpiece support for a processing machine.
• the workpiece support movable support surfaces are formed by workpiece support chains in and against the transport direction. Between the bearing surfaces, a gap is provided, in which a beam collecting device in the y-direction back and forth. An upper side of the beam collecting device facing the sheet metal blank serves to support the workpiece.
• the workpiece support chain consists of plastic or is coated with plastic.
• the chain links of the workpiece support chain can be equipped with ball supports.
• the term "aperture” is understood to mean an elongate element which covers the gap both in the y-direction and in the transport direction.
• a breakthrough is provided, which is movable in, preferably central, alignment with the laser beam in the y-direction back and forth.
• the diaphragm is expediently formed from pivotally interconnected metal members, of which a first metal member has an opening for the passage of the laser beam and second metal members have a cover.
• a pivot axis of the interconnected metal links runs approximately in the transport direction.
• the panel may be formed in the manner of a bicycle chain, which is guided to reciprocate at both ends of the gap in each case via a pinion.
• One of the chain links can be provided for the passage of the laser beam, whereas the other chain links can be provided with the cover, which counteracts a passage of cutting dust towards the underside of the metal strip.
• the diaphragm is formed of a toothed belt or a stainless steel band, which are provided with an opening for the passage of the laser beam.
• the toothed belt may have a metal insert in the region of the opening.
• a drive device with which the diaphragm is movable back and forth.
• the drive device may comprise at least one driven pinion, a driven roller or the like. Further, for driving the pinion, the roller or the like.
• An electric motor in particular a servomotor may be provided, which is controllable in dependence on a position of the laser cutting device in the y-direction so that the aperture of the diaphragm always running in alignment with the laser beam and is moved here.
• a first support means with a first support strip and at the second end a second support means provided with a second support strip opposite the first support strip, so that the gap between the first and the second support strip is formed.
• the first and the second support strip support the sheet metal strip in the
• a first movement plane is formed by an upper side of the first and / or second conveyor belt facing the sheet metal blank.
• the protective surfaces facing the laser cutting device are also advantageously located in the first movement plane.
• the first movement plane is arranged above a second plane of movement of the diaphragm in the y-direction, which is formed by a second diaphragm upper side of the diaphragm facing the laser cutting device.
• a support surface of the support strips facing the laser cutting device forms a first movement plane in the transport direction.
• the first movement plane is arranged above a second plane of movement of the diaphragm in the y-direction, which is formed by a second diaphragm upper side of the diaphragm facing the laser cutting device.
• the second plane of movement of the shutter is arranged so that the shutter is not in contact with the underside of the metal strip during reciprocation in the y-direction. This can be avoided in the y-direction undesirable movement of a nearly completely cut out of the sheet metal sheet metal plate. This in turn contributes to a particularly precise cutting along the predetermined cutting path.
• a dust discharge shaft extending from at least one of the support strips to a discharge direction pointing away from the laser cutting device is provided.
• the dust removal duct further contributes to the fact that cutting dust discharged through the panel does not get to the underside of the metal strip.
• the at least one support strip and / or the Staubab Kunststoffschacht is provided with a ventilation device for ventilation of the gap.
• a ventilation device for ventilation of the gap.
• the cutting dust is discharged substantially completely through the discharge chute in the discharge direction. It is not necessary to remove cutting dust or dust from the underside of the cut sheet.
• the ventilation device comprises ventilation ducts, which are provided in a support surface of the support strip facing the laser cutting device. The proposed embodiment can be produced in a particularly simple and cost-effective manner.
• the ventilation ducts extend over a length of the support surface extending in the transport direction.
• the ventilation channels may in particular run parallel and / or obliquely to the transport direction. They can have a curved or angled course.
• the ventilation device may also include ventilation openings, which pass through at least one of the support strips and / or the dust discharge shaft. Such ventilation breakthroughs, z. As holes or slots, allow additional ventilation below a bottom of the metal strip and a sheet cut therefrom, such that an undesirable backflow of the formed during cutting of the sheet metal cutting dust does not form.
• the ventilation according to the invention at least one support strip and / or the Abtechnologyschachts can be done "passive" or “active".
• passive ventilation air is drawn in through the ventilation device.
• the air is sucked in by a venturi effect, which is formed as a result of the cutting gas flow directed in the discharge direction and caused by the cutting gas.
• active ventilation air is blown through the ventilation device in the direction of the exhaust duct. It forms in this case, a higher flow velocity.
• the flow rate can also be controlled or regulated in this case.
• active ventilation it is possible, in particular, to provide a fan for supplying air to the ventilation channels and / or ventilating openings.
• the blower can also be a suction blower, which flows is provided down the Staubab Kunststoffschachts and generates a suction flow through the aperture.
• the Staubab Kunststoffschacht has a widening in the discharge direction cross-section. This also counteracts the formation of an undesirable backflow of cutting dust in the direction of the underside of the sheet.
• the support strips and / or the Staubab Kunststoffschacht and / or the diaphragm are suitably made of copper or a substantially copper-containing alloy. It has been shown that the adhesion of cutting dust to copper materials is particularly low.
• the ventilation channels and / or ventilation openings and / or the aperture in this case do not end up with cutting dust, even with long service lives. It can always ensure proper ventilation.
• the dust removal duct may be connected to a container for catching cutting dust.
• the Staubab.schacht and the aperture can only on one of the two
• the Staubab Switzerlandschacht can be easily moved along with the slot.
• the Staubab 2010schacht is advantageously formed by two Malawickende in discharge direction walls.
• the walls extend z. B. substantially in a direction perpendicular to the transport direction. At least one, preferably both, walls may be attached to one of the support rails.
• In the lateral edge regions of the Staubab constitutionalkanals connected to the blower openings may be provided to form an air sword. This can be avoided that cutting dust in the edge regions of the sheet metal strip on an upper side of the same or on the upper side thereof cut sheets passes.
• the air sword and side walls may be provided, which approximately in the transport direction and are attached to at least one of the two opposing walls.
• a first conveying means is advantageously arranged upstream of the first supporting means upstream.
• the second support means downstream of a second conveyor may be arranged downstream. This allows a transport, in particular a continuous transport, of the metal strip over the slot formed between the support strips.
• the first funding may, for. B. include a roller leveler.
• the first and / or the second conveying means may also comprise a conveyor belt and / or a roller conveyor.
• 1 is a partial perspective view of a first device
• FIG. 2 shows a perspective partial view of a second device
• FIG. 3 shows a perspective partial view of a third device
• 5a is a partial perspective view of a fifth device
• FIG. 5b is a detail view of FIG. 5a
• FIG. 6 is a schematic cross-sectional view through a sixth device
• FIG. 7 is a schematic cross-sectional view through a seventh device
• Fig. 8 is a schematic sectional view through a diaphragm
• Fig. 9 is a schematic partial sectional view through a further panel.
• FIGS. 1 to 5b show devices in which, for the sake of clarity, the diaphragm which can be moved back and forth in the y-direction has been omitted.
• a transport direction of the sheet metal strip 1 is designated by the reference symbol T.
• the reference numeral 2 denotes a cutting nozzle of a laser cutting device, not shown here in detail.
• the cutting nozzle 2 is movable by means of a conventional movement device in the transport direction T and in a direction perpendicular thereto y-direction, so that sheets with a predetermined contour can be cut out of the sheet metal strip 1.
• the sheet-metal strip 1 can be moved continuously in the transport direction T.
• the cutting nozzle 2 is designed such that cutting gas and a laser beam L can thereby be guided onto the sheet-metal strip 1.
• the sheet-metal strip 1 is supported in the cutting area on a first support strip 3 and an oppositely disposed second support strip 4.
• the first 3 and the second support strip 4 extend approximately in the y-direction. Between the support strips 3, 4, a gap S is formed through which a laser beam L passes.
• the first 3 and the second support strip 4 are movable by means of a conventional device not shown here along with the cutting nozzle 2.
• the first support bar 3 with a upstream upstream first funding eg. B. a first belt conveyor 5
• the second support strip 4 with a downstream downstream second conveyor means, for. B.
• a discharge chute is generally referred to, which extends in a direction away from a bottom U of the sheet metal strip 1 discharge direction A.
• the discharge chute 9 is formed here by two walls 10a, 10b which extend in the discharge direction A.
• the first wall 10a is attached to the first support strip 3 and the second wall 10b is attached to the second support strip 4.
• the walls 10a, 10b extend in the y-direction.
• the support strips 3, 4 can also be formed in one piece with the respective wall 10a, 10b. It is also possible for both walls 10a, 10b to be connected to one another via connecting walls extending in the transport direction T (not shown here). Such connecting walls are expediently provided laterally outside a cutting region in the y-direction. In this case, the discharge chute 9 can be attached to the corresponding support strip 3 or 4 by means of only one of the two walls 10a or 10b.
• the first 3 and the second support strip 4 each have one of the cutting nozzle 2 facing support surface 1 1 a, 1 1 b.
• Each of the support surfaces 1 1 a, 1 1 b is provided with approximately in the transport direction T extending ventilation channels 12.
• the ventilation channels 12 extend over an entire first length Lg1 of the support strips 3, 4, so that air can be supplied to the gap S through the ventilation channels 12 when the sheet-metal strip 1 is resting on the support surfaces 11a, 11b.
• the reference symbol B denotes a container, which is arranged downstream of the discharge chute 9 in the discharge direction A.
• the container B is not connected to the discharge chute 9 here, ie the container B is fixed relative to the discharge chute 9.
• a second length Lg2 of the container B extends in transport direction T at least over a predetermined range of movement of the co-moving discharge chute 9.
• the ventilation channels 12 extend obliquely to the transport direction T. They extend over the entire first length Lg1 of the first 1 1 a and the second support surface 1 1 b of the support strips 3, 4.
• the ventilation channels 12 are each divided into two sections 13a, 13b, which are arranged offset in the transport direction T to one another.
• the sections 13a, 13b are connected to each other via an approximately in the y-direction extending connecting channel 13c.
• the first support strip 3 is provided with a first vent opening 14a and the second support strip 4 is provided with a second vent opening 14b.
• ventilation openings 14a, 14b are provided in an edge region of the support strips 3, 4.
• vent openings 14a, 14b may be connected via lines 15, which are only schematically indicated here, to a blower 16, which is also indicated schematically.
• Ventilation openings 14a, 14b By means of the ventilation openings 14a, 14b, compressed air can also be blown into the cutting gap S via the lines 15 by means of the blower 1. This can be more effectively avoided the formation of a return flow against the bottom U.
• a mass flow of the air in particular through the ventilation openings 14 a, 14 b supplied air can, for. B. depending on a gap width of the gap S are controlled.
• at least one control valve downstream of the blower 1 6 (not shown here).
• the ventilation apertures 14a, 14b can also be arranged laterally outside a cutting region in the y-direction.
• an air sword can be generated in this area by means of through-air. With the air sword, a lateral leakage of cutting dust Ss and contamination of the underside U of the sheet metal strip 1 opposite top O can be avoided. Connecting walls are not required in this case.
• a cold trap is provided downstream of the gap S, in particular in the region of the first 10a and the second wall 10b.
• the cold trap can be formed, for example, by a plurality of nozzles provided in 10a and / or the second wall 10b, through which cold air, in particular dry cold air, or cold nitrogen, which is expediently produced by evaporation of liquid nitrogen, is injected.
• the cold trap can of course be designed differently. For example, one or more lines running in the y direction in the region of the walls 10a, 10b or the Abtechnologyschachts 9 may be provided, which are flowed through by a coolant.
• the aeration device 12, 13a, 13b, 13c, 14a, 14b is omitted and instead the device for cutting sheet metal blanks is provided only with a cold trap arranged downstream of the gap S.
• the sixth device shown schematically in cross-section in FIG. 6 has in the gap S a diaphragm 18 which can be moved back and forth in the y-direction and which is supported, for example, on the first 19a and second shoulders 19b extending from the first wall 10a and the second wall 10b is.
• One of the cutting nozzle 2 facing diaphragm top Ob forms a second plane of movement BE2.
• the sheet-metal strip 1 rests with its underside U on the first movement plane BE1, whereas the second movement plane BE2 is located at a distance from the underside U of the sheet-metal strip 1.
• the diaphragm 18 is formed substantially closed in the y direction. It has an opening 20 for the passage of the laser beam L.
• Fig. 7 shows a sectional view through the gap S parallel to the y-direction.
• the aperture 18 is guided around further deflection rollers 21, one of which with a (not shown here) driving means, for. B. a servomotor, is driven.
• a clamping device is referred to, with which the diaphragm 18 is kept taut.
• the walls 10a, 10b (not visible here), a further container B1 downstream, which may be formed, for example, tubular.
• Fig. 8 shows a schematic cross-sectional view through an embodiment of a diaphragm 18.
• the diaphragm 18 is formed here of a toothed belt 23, which is made of a temperature-resistant polymer.
• the reference numeral 24 designates an insert inserted in the toothed belt 23, which insert is made of metal, for example. In the insert 24, the opening 20 is provided.
• the diaphragm 18 can also be formed from first metal members 25 pivotably connected to one another in the manner of a chain, in which a second metal member 26 is turned on.
• the first metal members 25 are each provided with a cover 27.
• the cover 27 is omitted in the second metal member 26, so that here the opening 20 is formed for the passage of the laser beam L.
• the further function of the device is the following:
• the aperture 18 recorded in the gap S is moved together with the support strips 3, 4 in the transporting direction T along with the cutting nozzle 2 in the transporting direction T back and forth. Apart from that, the diaphragm 18 is moved in the y-direction with the cutting nozzle 2 back and forth, so that the exiting through the cutting nozzle 2 laser beam L is always in alignment with the opening 20.
• one of the further deflection rollers 21, which may be designed, for example, as a pinion or toothed belt pulley may be provided with a drive device. In the drive device is z. B. to a servo or servo motor, which is connected to a controller. The control serves both to control the laser cutting device in the y direction and to control the diaphragm 18 in the y direction, in such a way that the laser beam L is always directed to the opening 20 of the diaphragm 18. 1 sheet metal strip

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• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Optics & Photonics (AREA)
• Mechanical Engineering (AREA)
• Plasma & Fusion (AREA)
• Life Sciences & Earth Sciences (AREA)
• Forests & Forestry (AREA)
• Laser Beam Processing (AREA)

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Citations (4)

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• 2015
  • 2015-09-28 DE DE102015218649.0A patent/DE102015218649A1/de not_active Withdrawn
• 2016
  • 2016-07-28 ES ES16750686T patent/ES2770004T3/es active Active
  • 2016-07-28 EP EP16750686.4A patent/EP3349939B1/de active Active
  • 2016-07-28 HU HUE16750686A patent/HUE047754T2/hu unknown
  • 2016-07-28 JP JP2018532510A patent/JP6783310B2/ja active Active
  • 2016-07-28 CN CN201680047543.6A patent/CN107921583B/zh active Active
  • 2016-07-28 US US15/746,641 patent/US10722981B2/en active Active
  • 2016-07-28 WO PCT/EP2016/068085 patent/WO2017045821A1/de not_active Ceased
  • 2016-07-28 MX MX2018000991A patent/MX376388B/es active IP Right Grant

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