HANDHELD LASER MACHINING APPARATUS FOR MACHINING A WORKPIECE, AND FUNNEL FOR A HANDHELD LASER MACHINING APPARATUS

Abstract

The invention relates to a handheld laser machining apparatus for machining a workpiece. The laser machining apparatus comprises a handheld apparatus (100) comprising an optical device for deflecting laser beams onto the workpiece, a supply unit (3) for open-loop or closed-loop control of the handheld device and/or for supplying power/fluid to the handheld device and a funnel (4) for coupling the handheld device to the workpiece. The invention also relates to a funnel (4) for a corresponding laser machining apparatus.

Claims

1. A handheld laser machining apparatus for machining a workpiece, comprising a handheld apparatus with an optical device for deflecting laser beams onto the workpiece, a supply unit for controlling the handheld apparatus in an open-loop or closed-loop manner and/or for supplying power and fluid to the handheld apparatus, and a funnel with a handheld apparatus side and a workpiece side, for coupling the handheld apparatus to the workpiece, wherein two different pumps are provided, by which two different negative pressure regions which are separate from one another can be generated at the funnel (4).

2. The handheld laser machining apparatus as claimed in claim 1, wherein the funnel comprises on the workpiece side two negative pressure regions that are sealed with respect to one another and mounted one inside the other and/or wherein the funnel comprises a receiving portion for an exhaust-air filter element and/or a receiving portion for an optical element and/or wherein the funnel comprises two seals respectively on the workpiece side and on the handheld apparatus side (44), wherein in particular an outer seal on the workpiece side of the funnel is an angular seal and particularly preferably a sealing frame (48).

3. The handheld laser machining apparatus as claimed in claim 2, wherein the inner of the negative pressure regions can be fluidically coupled to a suction pump and the outer of the negative pressure regions can be fluidically coupled to a vacuum pump and/or wherein the inner negative pressure region is coupled to the atmosphere by way of a supply-air opening.

4. The handheld laser machining apparatus as claimed in claim 3, wherein the supply-air opening is set up not to allow laser beams to escape to outside the funnel (4) from the inner negative pressure region (42).

5. The handheld laser machining apparatus as claimed in claim 1, wherein the funnel can be coupled to the handheld apparatus by a bayonet fastener, in particular secured by way of resilient pressure pieces.

6. The handheld laser machining apparatus as claimed in claim 5, wherein the bayonet fastener comprises threaded portions , which in particular include an obtuse angle with corresponding axial portions of the bayonet fastener.

7. The handheld laser machining apparatus as claimed in claim 1, wherein at least one of the pumps is provided in the supply unit and/or wherein a safety device is provided, which is set up to interrupt the laser beams if the differential pressure between one of the negative pressure regions and the ambient pressure lies outside a permissible range.

8. A handheld laser machining apparatus for machining a workpiece, comprising a handheld apparatus with an optical device for deflecting laser beams onto the workpiece, a supply unit for controlling the handheld apparatus in an open-loop or closed-loop manner and/or for supplying power and fluid to the handheld apparatus, and a funnel with a handheld apparatus side and a workpiece side, for coupling the handheld apparatus to the workpiece (200), wherein the handheld apparatus comprises a scanner, mounted on a scanner mounting, a mirror deflecting and adjusting system and a collimator, mounted in a collimator mounting.

9. The handheld laser machining apparatus as claimed in claim 8, wherein the scanner mounting couples the mirror deflecting and adjusting system to the scanner and the funnel directly and/or is produced in one piece and/or wherein the scanner mounting comprises at least one sealing portion for the fluid-tight connection of the mirror deflecting and adjusting system and/or wherein the scanner mounting comprises at least one lead-through for pins for positioning the mirror deflecting and adjusting system and/or the scanner and/or wherein the scanner mounting comprises clearances for disconnecting screws for separating the scanner mounting from the mirror deflecting and adjusting system and/or wherein the scanner mounting is produced in one piece, in particular is printed and/or sintered.

10. The handheld laser machining apparatus as claimed in claim 8, wherein the scanner mounting comprises a through-hole for leading the laser beam from the mirror deflecting and adjusting system to the workpiece, wherein the through-hole is in particular a threaded bore and/or is set up to be coupled to a stop plate and/or a measuring tube and/or wherein the scanner mounting comprises a sealing surface for placing against the funnel and/or wherein the scanner mounting comprises a thermal attachment surface for dissipating heat from the scanner, wherein the lost heat of the scanner is produced near the attachment surface (137).

11. The handheld laser machining apparatus (100) as claimed in claim 8, wherein the scanner mounting comprises a coupling portion for coupling the scanner mounting to a protective glass of the scanner and/or wherein the scanner mounting comprises connections, receptacles and/or lines for a camera, for an illumination, for pressure sensors, for a filter and/or prefilter, for a sensor for detecting darkness in the funnel (4), for an identification device, for a temperature sensor, to a suction pump and/or to a vacuum pump.

12. The handheld laser machining apparatus as claimed in claim 8, wherein the scanner mounting comprises components of a bayonet fastener by which the handheld apparatus can be coupled to the funnel and/or wherein the scanner mounting comprises clearances for pressure pieces and/or guide pins of the bayonet fastener and/or wherein the scanner mounting comprises threaded portions of the bayonet fastener.

13. The handheld laser machining apparatus as claimed in claim 8, wherein the mirror deflecting and adjusting system comprises a mounting and/or an adjusting device for holding and/or adjusting two mirrors, wherein in particular at least one of the mirrors is a fully reflective mirror or a partially reflective mirror and/or wherein in particular the adjusting device comprises tiltable mirror holders, adjusting screws and/or elastic bearing portions, wherein the mirrors can be borne and/or can be adjusted by the mirror holders, the adjusting screws and/or the elastic bearing portions, and/or wherein the mirror deflecting and adjusting system is produced in one piece, in particular is printed and/or sintered.

14. The handheld laser machining apparatus as claimed in claim 8, wherein the mirror deflecting and adjusting system comprises sealing portions on two opposite sides, by which the mirror deflecting and adjusting system can be coupled in a sealing manner to the collimator mounting and the scanner mounting and/or wherein the mirror deflecting and adjusting system comprises lead-throughs for pins for positioning the collimator mounting and/or the scanner mounting and/or wherein the mirror deflecting and adjusting system comprises an adjustable receptacle for coupling in a guide laser and/or pilot laser onto the beam path of a working laser of the laser machining apparatus and/or wherein the mirror deflecting and adjusting system comprises clearances for disconnecting screws for separating the mirror deflecting and adjusting system from the scanner mounting and/or from the collimator mounting.

15. The handheld laser machining apparatus as claimed in claim 8, wherein the collimator mounting is coupled directly to the mirror deflecting and adjusting system and/or the mirror deflecting and adjusting system is coupled directly to the scanner mounting and/or wherein the collimator mounting comprises at least one sealing portion and/or at least one coupling portion for the sealing coupling of the collimator mounting to the collimator and/or to the mirror deflecting and adjusting system and/or wherein the collimator mounting is formed as a heat bridge for dissipating waste heat of the scanner and/or wherein the collimator mounting comprises lead-throughs for pins for positioning the collimator mounting on the mirror deflecting and adjusting system and/or wherein the collimator mounting and/or the scanner mounting and/or the mirror deflecting and adjusting system are coupled to one another by way of in particular four screws and/or in wherein the collimator mounting comprises clearances for disconnecting screws for separating the collimator mounting from the mirror deflecting and adjusting system and/or wherein the collimator mounting comprises a clamping portion for clamping the collimator against twisting and/or wherein the collimator mounting comprises a cable and/or hose guide and/or wherein the collimator mounting is produced in one piece, in particular is printed and/or sintered.

16. The handheld laser machining apparatus as claimed in claim 1, wherein the funnel is identifiable by an identification device on the handheld apparatus.

17. The handheld laser machining apparatus at least as claimed in claim 1, wherein the laser machining apparatus can at least for a time be operated exclusively by way of an energy store coupled to the supply unit.

18. The handheld laser machining apparatus as claimed in claim 1, wherein the funnel and/or the handheld apparatus can be coupled to a stationary laser machining device and/or wherein the handheld apparatus comprises two handles which are separate from one another.

19. The handheld laser machining apparatus as claimed in claim 8, wherein a mobile terminal for setting the laser machining apparatus is provided, wherein the terminal is set up in particular to set the laser machining apparatus in a switched-off state of the supply unit.

20. A funnel for a handheld laser machining apparatus as claimed in claim 1.

Description

[0048] Further details and advantages of the invention are explained on the basis of the figures, in which:

[0049] FIG. 1: shows a schematic representation of the laser machining apparatus;

[0050] FIG. 2a: shows a side view of a funnel;

[0051] FIG. 2b: shows a view from below of the funnel;

[0052] FIG. 3: shows a perspective view of an optical device of the laser machining apparatus with a scanner;

[0053] FIG. 4: shows a perspective view of an optical device of the laser machining apparatus without a scanner;

[0054] FIG. 5: shows a perspective view of a scanner mounting of the laser machining apparatus; and

[0055] FIG. 6: shows a perspective view of a collimator mounting of the laser machining apparatus.

[0056] FIG. 1 shows a handheld laser machining apparatus 100 for machining a workpiece 200, comprising a handheld apparatus 1 with an optical device 2, which is located inside a housing of the handheld apparatus 1 and is explained in more detail in FIGS. 3 to 6. The device 2 serves for deflecting laser beams onto the workpiece 200.

[0057] The laser machining apparatus 100 comprises a supply unit 3 for controlling the handheld apparatus 1 in an open-loop or closed-loop manner and/or for supplying power and/or fluid to the handheld apparatus 1. The fluid supply of the handheld apparatus 1 comprises in the present case in particular the extraction of exhaust gases in the region of the handheld apparatus 1 and the generation of negative pressures in the region of the handheld apparatus 1. The supply unit 3 may be of a movable design and be coupled to the handheld apparatus 1 by way of a flexible connection 40. The supply unit 3 may comprise all of the devices of the laser machining apparatus 100 that are too large and/or too heavy to be accommodated in the handheld apparatus 1. In particular, the supply unit 3 may comprise an open-loop/closed-loop control device, which can control components of the laser machining apparatus 100 in an open-loop or closed-loop manner. The supply unit 3 may comprise an energy store, with which the components of the laser machining apparatus 100 can be supplied with power. Furthermore, the supply unit 3 may comprise a laser light source, which is set up to generate laser beams for the handheld apparatus 1. The supply unit 3 may additionally comprise further components. Also conceivable is a configuration in which a laser source is completely integrated in the handheld apparatus 1 or in the handle of the handheld apparatus 1.

[0058] The laser machining apparatus 100 comprises furthermore a funnel 4 with a handheld apparatus side 44 on which the funnel 4 can be coupled to the handheld apparatus 1 and with a workpiece side 41 for coupling the handheld apparatus 1 onto the workpiece 200. During the coupling of the funnel 4 to the workpiece 200, the funnel 4 together with the handheld apparatus 1 can be pressed by a user of the laser machining apparatus 100 onto the workpiece 200 and be sucked against the workpiece 200 by way of a negative pressure or by way of two, optionally different negative pressures of two different negative pressure regions 42, 43. By way of the negative pressure, exhaust gases occurring during the machining of the workpiece 200 can be extracted and optionally introduced into the supply unit 3. Furthermore, the negative pressure can be monitored, and thus it can be established whether the funnel 4 is lying against a workpiece 200 and/or whether there is damage to the funnel 4 or to other portions of the laser machining apparatus 100 that are subjected to the negative pressure.

[0059] The laser machining apparatus 100 comprises two different pumps 5, 6, by means of which two different negative pressure regions 42, 43 which are separate from one another, are shown in more detail in FIG. 2b, described further below, and by means of which the handheld apparatus 1 can be sucked against the workpiece 200 can be generated at the funnel 4. Depending on the size and weight of the selected pumps 5, 6, they may be provided as shown in the supply unit 3, or at least one of the pumps may be arranged in the handheld apparatus 1.

[0060] FIG. 1 does not show a grid connection of the laser machining apparatus 100, but such a connection may of course be provided in order to supply the laser machining apparatus 100, and optionally an energy store provided therein, with power. The laser machining apparatus 100 or its components may be designed for such power-saving operation that the laser machining apparatus 100 can at least for a time be operated exclusively by way of an energy store coupled to the supply unit 3.

[0061] It can be seen in the representation of FIG. 1 that the laser machining apparatus 100 is designed for mobile operation that is at least for a time independent of a power supply grid. It may however also be provided that the funnel 4 and/or the handheld apparatus 1 can be coupled to a stationary laser machining device. The stationary laser machining device may be for example part of a production line in which workpieces are inscribed or marked by a laser. The stationary laser machining device may in this case replace the function of the funnel 4. One aspect of this function of the funnel is that of providing protection for persons nearby from injury by the laser light, allowing the extraction of the exhaust gases occurring during the laser machining and fixing a defined distance of the handheld apparatus 1 from the workpiece 200.

[0062] In particular, it may be possible that the handheld apparatus 1 can be coupled to the stationary laser machining device by way of the same coupling portion by way of which the handheld apparatus 1 can be coupled to the funnel. In this case, it is merely necessary for the funnel 4 to be removed and the handheld apparatus to be coupled instead to the stationary laser machining device. As a result, combined use of the laser machining apparatus 100 is possible.

[0063] For better handling of the handheld apparatus 1 two handles 12, 12' which are separate from one another and which a user of the laser machining apparatus respectively holds with one hand at the same time are provided on it. The handles 12, 12' may be provided at opposite end regions of the handheld apparatus 1 and in particular have gripping regions arranged transversely in relation to one another. A first handle 12 may be arranged in a region of the handheld apparatus in which the flexible connection 40 is led into the handheld apparatus 1. This first handle 12 may be arranged substantially parallel to the region of the flexible connection 40 that is closest to the handle 12. In particular, it is conceivable that the flexible connection is led through the first handle. The second handle 12' may be arranged perpendicularly or at an angle greater than for example 45° or adjustably in relation to the first handle 12. The two handles 12, 12' and the funnel 4 may be arranged on outermost regions of the handheld apparatus 1 in the side view thereof of FIG. 1.

[0064] For setting, programming or controlling the laser machining apparatus 100, a mobile terminal 300 may be provided, wherein the terminal 300 is set up in particular for setting the laser machining apparatus 100 in a switched-off state of the supply unit 3. Thus, irrespective of its state and position, data concerning machining programs or concerning settings of the laser machining apparatus 100 can be input into the terminal 300. The laser machining apparatus 100 can then also be coupled to the terminal 300 by way of cables or else without cables at a different time from the data transmission. The terminal 300 may be a tablet, a smartphone or some other data input and output device.

[0065] The funnel 4 itself may be additively manufactured, and optionally created individually to correspond to individual user profiles. The shape and size of the funnel 4 may in this case depend inter alia on the workpieces 200 to be machined and/or on the space available for machining the workpieces 200. Different funnels 4 may in this case be shaped such that they can be coupled to the handheld apparatus 1 by way of identically configured coupling portions.

[0066] FIGS. 2a and 2b show the funnel 4 in different views. It may be possible that the funnel 4 can be coupled to the handheld apparatus 1 by means of a bayonet fastener 11 secured in particular by way of resilient pressure pieces. FIG. 2a shows parts of the bayonet fastener 11, to be specific threaded portions 111 and axial portions 112, into which corresponding pins of the handheld apparatus 1 can be inserted. Also conceivable is a configuration in which threaded portions 111 and axial portions 112 are provided on the handheld apparatus 1 and corresponding pins are provided on the funnel 4. The axial portions 111 extend parallel to the longitudinal axis of the funnel 4, along which the funnel 4 is moved toward the handheld apparatus 1 for coupling to it. The threaded portions 111 extend at an obtuse angle in relation to the axial portions 112 respectively adjacent to them of the bayonet fastener 11. As a result, a bayonet fastener 11 in which the two interconnected parts are in contact with one another at defined portions that are not elastic or not very elastic can be realized, whereby more exact positioning of the two interconnected parts is made possible. In order to prevent unwanted release of the bayonet fastener 11, the aforementioned pressure pieces of one of the two interconnected parts may engage in corresponding clearances on the other of the interconnected parts respectively.

[0067] According to the view from below of FIG. 2b, the funnel 4 has on its workpiece side 41 shown here two negative pressure regions 42, 43 that are sealed with respect to one another and mounted one inside the other. The negative pressures in these negative pressure regions 42, 43 are generated by means of the pumps 5, 6, so that corresponding lines are provided between the pumps 5, 6 and the negative pressure regions 42, 43. The negative pressure regions 42, 43 extend in this case through the respective lines within the laser machining apparatus 100.

[0068] As can also be seen from FIG. 2b, the funnel 4 comprises on the workpiece side 41 two seals 47, 48, wherein in particular an outer seal 48 on the workpiece side 41 of the funnel 4 is an angular seal 48 and particularly preferably a sealing frame 48. The outer seal 48 may have a greater circumference than the inner seal 47. By means of the seals 47, 48, the two negative pressure regions 42, 43 can be sealed with respect to one another and with respect to the surroundings as long as the funnel is placed against a workpiece 200. The laser beam can then act on the workpiece 200 within the inner negative pressure region 42, wherein the exhaust gases from the laser machining are extracted by way of the funnel 4. The outer negative pressure region 43 may have a lower pressure than the inner negative pressure region 42, and thus exert a great holding force on the workpiece 200, which facilitates the positioning of the handpiece 1 on the workpiece 200. Two seals may likewise be provided on the handheld apparatus side 44 of the funnel 4, allowing leading through of the two negative pressure regions 42, 43 from the funnel 4 to the handheld apparatus 1 and further to the pumps 5, 6.

[0069] The inner negative pressure region 42 may be fluidically coupled to a suction pump 6 and the outer of the negative pressure regions 43 may be fluidically coupled to a vacuum pump 5. The suction pump 6 may be set up to generate a pressure of 150-300 mbar below atmospheric pressure or ambient pressure. The vacuum pump 5 may be set up to generate a pressure of 550-700 mbar below atmospheric pressure or ambient pressure. The inner negative pressure region 42 is coupled to the atmosphere by way of a supply-air opening 421. As a result, an air flow which allows the extraction of exhaust gases occurring during the laser machining can be generated in the inner negative pressure region by means of the suction pump 6.

[0070] The supply-air opening 421 may be set up not to allow laser beams to escape to outside the funnel 4 from the inner negative pressure region 42. For this, the supply-air opening 421 may be formed as labyrinthine, bent, kinked and/or otherwise such that a laser beam cannot leave the interior of the funnel 4 through the supply-air opening 421 and become a danger to persons in the vicinity.

[0071] The laser machining apparatus 100 may comprise a safety device, which is set up to interrupt the laser beams if the differential pressure between one of the negative pressure regions 42, 43 and the ambient pressure lies outside a permissible range. In this way it is possible to detect lifting off of the funnel 4 from the workpiece 200 and damage to the funnel 4 or the two negative pressure regions 42, 43 and to deactivate the laser to protect the device and to protect persons in the vicinity.

[0072] An RFID transponder which can be identified by means of an identification device may be provided for example on the funnel 4. The identification device may be provided on the handheld apparatus 1 and provide data of the RFID transponder for the laser machining apparatus 100. The laser machining apparatus 100 may thus for example automatically determine the type of funnel 4. If for example it is determined that the connected funnel 4 is a funnel 4 with just one negative pressure region 42, 43, the laser machining apparatus 100 may automatically dispense with the operation of one of the two pumps.

[0073] FIG. 3 shows some essential components of the laser machining apparatus 100, some of which are fitted in the housing (not shown) of the handheld apparatus 1. Shown in the upper region of FIG. 3 is the optical device 2, which serves for deflecting laser beams onto the workpiece 200. This device may be arranged completely or almost completely inside a housing of the handheld apparatus 1 and be coupled to the funnel 4 shown further below. The funnel is largely or completely located outside the structure of the optical device 2 or of the handheld apparatus 1. The funnel 4 is coupled with its handheld apparatus side 44 to the optical device 2. The funnel 4 may be placed with its workpiece side 41 against a workpiece 200 for the machining thereof.

[0074] The optical device 2 comprises a scanner mounting 13, on which a scanner 14 is mounted. The scanner mounting 13 is also coupled to a mirror deflecting and adjusting system 15, arranged on which in turn is a collimator mounting 16, in which a collimator that is not shown any further can be mounted. From the collimator, laser beams are conducted through the mirror deflecting and adjusting system 15, through a lead-through in the scanner mounting 13 and into the scanner 14. By means of the mirror deflecting and adjusting system 15, the laser beams coming from the collimator can be adjusted, so that they enter the scanner 14 at a defined angle and in a defined region. The scanner 14 comprises adjustable mirrors, by means of which the laser beams for machining the workpiece 200 are moved. After the deflection of the laser beams by the scanner 14, they pass once again through the lead-through in the scanner mounting 13 into the funnel 4 and from there onto the workpiece 200, in particular through a focusing element.

[0075] The scanner mounting 13 may be dimensioned such that it is enclosed by a cuboid with the side lengths 85 mm, 85 mm and 93 mm. The collimator mounting 16 may be dimensioned such that it is enclosed by a cuboid with the side lengths 63 mm, 71 mm and 115 mm. The mirror deflecting and adjusting system 15 may be dimensioned such that it is enclosed by a cuboid with the side lengths 24 mm, 71 mm and 72 mm. All of the figures given for the lengths apply with the tolerance of ±10 mm, in particular of ±5 mm.

[0076] FIG. 4 shows the same components as FIG. 3, with the difference that here the scanner 14 is not shown, for the sake of a better overview. The scanner mounting 13 has an L-shaped profile, wherein the funnel 4 can be coupled to one of the legs and the mirror deflecting and adjusting system 15 can be coupled to the other of the two legs.

[0077] The mirror deflecting and adjusting system 15 comprises a lead-through, in which the mirrors can be mounted such that they are angled in relation to one another. The mirrors are arranged such that laser beams are led through the lead-through, and their direction or position can be changed or adjusted by the mirrors. At least one of the mirrors may be a fully reflective mirror or a partially reflective mirror. The mirror deflecting and adjusting system 15 comprises an adjusting device for holding and/or adjusting the mirrors. The adjusting device may comprise tiltable mirror holders, adjusting screws and/or elastic bearing portions, wherein the mirrors can be mounted and/or can be adjusted by means of the mirror holders, the adjusting screws and/or the elastic bearing portions. The adjusting screws, and in particular the elastic bearing portions, may interact with one another for adjusting the mirrors, and in particular exert a force on the latter from two different sides of the mirrors. The mirror deflecting and adjusting system 15 may be produced in one piece, in particular be printed and/or sintered.

[0078] The mirror deflecting and adjusting system 15 may comprise sealing portions on two opposite sides of the mirror deflecting and adjusting system 15, by means of which the mirror deflecting and adjusting system 15 can be coupled in a sealing manner to the collimator mounting 16 and the scanner mounting 13. The sealing portions may be formed as grooves in which seals can be positioned. The mirror deflecting and adjusting system 15 may also comprise lead-throughs for pins for positioning the collimator mounting 16 and/or the scanner mounting 13. The mirror deflecting and adjusting system 15 may furthermore comprise an adjustable receptacle (not shown any more specifically) for coupling in a guide laser and/or pilot laser onto the beam path of the working laser of the laser machining apparatus 100. This receptacle may for example be formed by means of screws and corresponding threaded openings such that a guide laser and/or pilot laser coupled thereto can be exactly positioned and adjusted. The mirror deflecting and adjusting system 15 may also comprise clearances for disconnecting screws for separating the mirror deflecting and adjusting system 15 from the scanner mounting 13 and/or from the collimator mounting 16. The disconnecting screws can in this case be mounted within these clearances for separating the mentioned components. If a separating force is exerted by way of the separating screws on the components to be separated, the components can undergo deformation just in the region of the clearances. A deformation within the clearances does not stand in the way of the mentioned components being connected once again so as to ensure that the connected components lie as closely as possible against one another.

[0079] FIG. 5 shows a detailed view of the scanner mounting 13. This couples the mirror deflecting and adjusting system 15 to the scanner 14 and the funnel 4 directly, as is shown in FIG. 4. The scanner mounting 13 may comprise at least one sealing portion for the fluid-tight connection of the mirror deflecting and adjusting system 15. This sealing portion may for example comprise a groove for a seal and be provided on the rear side of the scanner mounting 13, which cannot be seen in FIG. 5 and is facing the mirror deflecting and adjusting system 15. The scanner mounting 13 may also comprise at least one lead-through 132 for pins for positioning the mirror deflecting and adjusting system 15 and/or the scanner 14 on the scanner mounting 13. Furthermore, the scanner mounting 13 may comprise clearances 133 for disconnecting screws for separating the scanner mounting 13 from the mirror deflecting and adjusting system 15. The scanner mounting 13 may be produced in one piece, in particular be printed and/or sintered. The scanner mounting 13 and the further components of the optical device 2 may consist of metallic, synthetic or hybrid materials

[0080] The scanner mounting 13 has on its one leg at a through-hole 134 for leading the laser beam from the mirror deflecting and adjusting system 15 shown in FIG. 4 to the workpiece 200. The through-hole 134 may be a threaded bore and be set up for being coupled to a stop plate and/or a measuring tube by way of the thread. The scanner mounting 13 may also comprise a sealing surface for placing against the funnel 4, the surface being located in a lower region of the scanner mounting. The scanner mounting 13 may also comprise a thermal attachment surface 137 for dissipating heat from the scanner shown in FIG. 3, wherein the lost heat of the scanner 14 is produced near the attachment surface 137. The attachment surface 137 may be formed as large as possible for better thermal conductivity. It conducts the waste heat of the scanner 14 to the mirror deflecting and adjusting system 15, from where it is dissipated further into the collimator mounting 16.

[0081] The scanner mounting 13 may also comprise a coupling portion 138 for coupling the scanner mounting 13 to a protective glass of the scanner 14. This coupling portion 138 may be formed for example as a thread. The scanner mounting 13 may comprise furthermore connections, receptacles and/or lines for a camera, for an illumination, for pressure sensors, for a filter and/or prefilter, for a sensor for detecting darkness in the funnel 4, for an identification device, for a temperature sensor, to a suction pump 6 and/or to a vacuum pump 5. These connections, receptacles and lines may be formed as lead-throughs, blind holes, threaded bores or other geometries on the scanner mounting 13 and be adapted to the mentioned components.

[0082] The scanner mounting 13 may comprise or receive components of a bayonet fastener 11 by means of which the handheld apparatus 1 can be coupled to the funnel 4. The components of the bayonet fastener 11 may be for example pins which can be mounted in corresponding clearances of the scanner mounting 13 and which can interact with threaded portions 111, shown in FIG. 2a, of the bayonet fastener 11 for coupling the respective components. The scanner mounting 13 may accordingly comprise clearances 135 for pressure pieces and/or guide pins of the bayonet fastener 11. It is alternatively or additionally conceivable that the scanner mounting 13 comprises threaded portions of the bayonet fastener 11. This configuration is not shown in FIG. 5.

[0083] FIG. 6 shows a collimator mounting 16. The collimator itself can be inserted into the collimator mounting 16 from the left in FIG. 6. The collimator mounting 16 may be coupled directly to the mirror deflecting and adjusting system 15. The mirror deflecting and adjusting system 15 may in turn be coupled directly to the scanner mounting 13.

[0084] The collimator mounting 16 may comprise at least one sealing portion 161 and/or at least one coupling portion 162 for the sealing coupling of the collimator mounting 16 to the collimator and/or to the mirror deflecting and adjusting system 15. The sealing portion 161 may be formed as a groove in which a seal can be positioned. The coupling portion 162 may comprise a clearance which is dimensioned to receive the collimator. In the region of the coupling portion 162 there may be provided a clamping portion 165 for clamping the collimator against twisting. Once a collimator has been inserted into the coupling portion 162, it can be ensured by its clamping that the collimator is not adjusted with respect to the otherwise fully adjusted handheld apparatus 1, whereby otherwise the previously correctly adjusted laser beams would be conducted through the handheld apparatus 1 or through the funnel 4 in a then inadmissible way.

[0085] The collimator mounting 16 may be formed as a heat bridge for dissipating waste heat of the scanner 14 and for this have a contact area with respect to the mirror deflecting and adjusting system 15 that is dimensioned with a correspondingly large surface area.

[0086] The collimator mounting 16 may also comprise lead-throughs for pins for positioning the collimator mounting 16 on the mirror deflecting and adjusting system 15.

[0087] It is conceivable that the collimator mounting 16 and/or the scanner mounting 13 and/or the mirror deflecting and adjusting system 15 are coupled to one another by way of in particular four screws. Corresponding lead-throughs 163 or threaded holes may be provided for this on the mentioned components. Four such lead-throughs 163 are shown in FIG. 6. The further components, connected to one another by way of the screws, may comprise correspondingly coaxially positioned lead-throughs. It is alternatively or additionally conceivable that two or three of the components, the scanner mounting 13, the mirror deflecting and adjusting system 15 and the collimator mounting 16, are produced in one piece with one another, and in particular are additively manufactured.

[0088] The collimator mounting 16 may comprise clearances for disconnecting screws for separating the collimator mounting 16 from the mirror deflecting and adjusting system 15. It may also be provided that the collimator mounting 16 comprises a cable and/or hose guide and/or that the collimator mounting 16 is produced in one piece, in particular is printed and/or sintered.

[0089] The invention is not restricted to the aforementioned embodiments, but may be varied in various ways. In particular, features of the aforementioned embodiments can be combined in any logically possible way. All of the features and advantages disclosed in the claims, in the description and in the figures, including design details and spatial configurations, may be essential to the invention both individually and in combination with one another.

REFERENCE NUMERALS

[0090] 1 Handheld apparatus [0091] 2 Optical device [0092] 3 Supply unit [0093] 4 Funnel [0094] 5 Vacuum pump [0095] 6 Suction pump [0096] 11 Bayonet fastener [0097] 111 Threaded portion [0098] 112 Axial portions [0099] 12, 12' Handle [0100] 13 Scanner mounting [0101] 132 Lead-through [0102] 133 Clearance [0103] 134 Through-hole [0104] 135 Clearance [0105] 137 Attachment surface [0106] 138 Coupling portion [0107] 14 Scanner [0108] 15 Mirror deflecting and adjusting system [0109] 16 Collimator mounting [0110] 161 Sealing portion [0111] 162 Coupling portion [0112] 163 Lead-throughs [0113] 165 Clamping portion [0114] 40 Connection [0115] 41 Workpiece side [0116] 44 Handheld apparatus side [0117] 47 Seal [0118] 48 Seal [0119] 421 Supply-air opening [0120] 100 Laser machining apparatus [0121] 200 Workpiece [0122] 300 Terminal