Laser machining systems and - method, a laser beam dithering can.

[0001] The present invention relates to laser processing and in particular to laser processing systems and - method, a laser beam can the dithering, uniform laser beam properties to be maintained during machining locations, for example on a three-dimensional surface of a workpiece.

[0002] Lasers are generally for processing substrates (hereinafter referred to as workpieces) or base materials with a whole range of different techniques used. An example of a laser welding process laser processing application, wherein the laser is used, sufficient to heat the workpiece, in order to adhere to the surface of the workpiece and another material in a coating on the surface of the workpiece is applied. At a type of laser application welding process are entrained in a rapidly flowing gas stream powder particles, thereby allowing, by the laser in the heated region that the particles impinge on the workpiece in such a manner, that the particles adhere and bonding by plastic deformation. Examples of the laser welding process are described in more detail in the International application patent applications No wo 2013/061 085 and No wo 2013/061 086, which are inserted into the existing document by reference. Further examples of the laser processing the laser beam welding and the laser material removal or the laser cleaning are.

[0003] One of the challenges is the difficulty in laser processing, the laser beam in a manner to move, the more complex the processing surface (e.g. three-dimensional surfaces) allows on workpieces, while the desired properties of the laser beam (e.g. power density) are maintained. For existing laser processing systems it is not possible, to move the laser beam having the desired response time and bundling. Laser machining systems, which move the whole laser head, for example not provide relatively fast response time. Some existing laser application welding systems from simply keys in raster in a direction, which requires more time and effectively to complex three-dimensional surfaces, such as turbine blades, is not possible.

[0004] Existing laser processing systems further focusing the beam often in such a way, that the power density of the beam varies along the Z axis. The power density at a focused beam at different locations along the length of the beam can vary considerably, because the power density is inversely proportional to the square value of the radius of the light spot. Thus the movement of the laser beam and/or the processing three-dimensional surfaces leads to a significant change in the laser beam properties, such as the power density, at different machining locations on the workpiece, thereby adversely affecting the continuity of the laser machining is. Although moremore galvoscanner were used, for scanning laser beams in laser application welding systems, but the systems it is often not possible, maintains a constant power density that the beam to the machining locations. In particular laser application welding processes should be controlled the temperature profile for example, provided by the laser prior to powder, precise. The power density of the laser beam can change the temperature profile and prevent a change, that the coating is applied with the desired continuity.

[0005] There is accordingly a need for laser processing systems - and method, which are capable of, moving the laser beam, laser beam machining locations are maintained constant during properties to, for example on a three-dimensional surface of a workpiece.

[0006] According to one embodiment is a method for laser processing a workpiece provided. The method comprises generating a collimated laser beam with a constant power density in the Z direction along at least a portion of a length of the collimated laser beam, directing the collimated laser beam on a workpiece, to form a light spot on the workpiece, moving the workpiece in such a manner, that the light spot on the surface of the workpiece allowing machining, the workpiece moves, and dithering of the collimated laser beam along the X - or Y-axis in such a way, that the light spot is dithered on the workpiece, moves the workpiece.

[0007] According to another embodiment comprises a laser machining system is a glass fiber laser system and a beam transmission system, the optically with a glass fiber laser output of the optical fiber laser system are connected. The beam transmission system includes collimating lens, to produce a collimated laser beam, wherein at least one of the collimating lens is movable in the Z-direction, a diameter of the collimated beam to change. The laser processing system further comprises a mechanism for moving the glass fiber laser output relative to the collimating lens, the collimated laser beam in the X - or dithering to Y-direction, a workpiece carrier for supporting and moving a workpiece and a motion control system to control the movement of the workpiece carrier and of the mechanism, to move the glass fiber laser output relative to the collimating lens.

[0008] According to another embodiment comprises an optical head a housing, a glass fiber laser terminal for connecting a glass fiber laser output on said housing at one end of the housing and a beam transmission system, with the glass fiber in the housing and optically connected to laser output. The beam transmission system comprises first and second collimating lens for providing a collimated laser beam and a collimating lens for providing a final collimation of the collimated laser beam last. At least one of the first and second lenses is movable in the Z direction, a diameter of the collimated laser beam to change. The optical head further comprises a X-Y stage of a optics, which is accommodated in the housing and the collimating lens for the movement in the X and Y directions - carries.

[0009] According to one embodiment is a use of the method for laser machining as a laser welding method provided application, applying a coating to a workpiece welding layer. The laser welding method comprises generating a collimated laser beam application, a constant power density which in the Z direction along at least a portion of a length of the collimated laser beam, directing the collimated laser beam on a workpiece, to form a light spot on the workpiece, the welding material to the workpiece so aligning a contract, the application of weld material that impinges on the surface of the workpiece in a range, is heated by the light spot, and moving the workpiece such, welding material forms on the surface of the workpiece that the application an application welding layer, moves the workpiece.

[0010] According to another embodiment comprises the use of a laser welding system a glass fiber laser beam application system and a transmission system, the optically with a glass fiber laser output of the optical fiber laser system are connected. The beam transmission system includes collimating lens, to produce a collimated laser beam, wherein at least one of the collimating lens is movable in the Z-direction, a diameter of the collimated beam to change. The laser application welding system further comprises a mechanism for moving the glass fiber laser output relative to the collimating lens, the collimated laser beam in the X - or dithering to Y-direction, a workpiece carrier for supporting and moving a workpiece and a motion control system to control the movement of the workpiece carrier and of the mechanism, to move the glass fiber laser output relative to the collimating lens. The laser application welding system further comprises a powder transfer system for transferring a welding powder to the workpiece so, in that the coating on the surface of the workpiece in a range impinges welding powder, is heated by the collimated laser beam.

[0011] According to another embodiment comprises a use of the optical head as an integrated optical laser application welding head a housing, a glass fiber laser terminal for connecting a glass fiber laser output on said housing at one end of the housing and a beam transmission system, with the glass fiber in the housing and optically connected to laser output. The beam transmission system comprises first and second collimating lens for providing a collimated laser beam and a collimating lens for providing a final collimation of the collimated laser beam last. At least one of the first and second lenses is movable in a Z-direction, a diameter of the collimated laser beam to change. The integrated optical laser application welding head further comprises a X-Y stage of a optics, which is accommodated in the housing and the collimating lens for the movement in the X and Y directions - carries. The integrated optical laser application welding head further comprises a powder transfer system, comprising powder transfer nozzle affixed to said housing and for transmitting a welding powder on the workpiece is determined such, that the impinging on the surface of the workpiece in a range a welding powder, is heated by the collimated laser beam.

[0012] These and other features and advantages are better understood by means of the following detailed description in conjunction with the drawings. It shows:

A laser processing system in schematic perspective view and a figfig. 1a method for dithering a collimated laser beam on a three-dimensional surface of a workpiece according to embodiments of the present disclosure;

A laser light spot on the 1a 1b figfig. figfig. shown in schematic top view in the workpiece;

Figfig. 1c has; in schematic side view a collimated laser beam, moving across workpiece and a constant power density shown in figfig. 1a in the Z-direction

Examples of laser machining patterns figfig. 2a - 2d, the are formed by dithering a laser light point on a workpiece, the workpiece is provided during a coordinated movement, according to embodiments of the present disclosure;

In schematic perspective view a laser processing system figfig. 3a, having a beam transmission system for providing a collimated laser beam, can be dithered by a movable optics, according to some embodiments of the present disclosure;

In schematic perspective view a laser processing system figfig. 3b, comprising a beam transmission system for providing a collimated laser beam, can be dithered by a movable glass fiber laser output, according to further embodiments of the present disclosure;

4 Figfig. perspective view a configuration of the beam transmission system for providing a collimated laser beam, can be dithered;

5 Figfig. figfig. 4 in a side view shown in beam transmission system;

6 Figfig. shown in beam transmission system in a second Querschnittsansicht figfig. 4;

A laser welding system in schematic side view figfig. 7 application, comprising a beam transmission system for providing a collimated laser beam effect dithering capable, according to embodiments of the present disclosure;

A design of an integrated optical laser application perspective view figfig. 8 welding head for use in a Laserauftragschweisssystem;

9 Figfig. figfig. shown in integrated optical laser application welding head in a partial Seitenquerschnittsansicht 8;

An integrated optical head 9 in 10 figfig. figfig. integrated optical laser application welding head in a shown under opinion;

11 The integrated optical laser application welding head in a cross-sectional figfig. view along the line

Xi - xi of figfig. 9;

The integrated optical laser application welding head 12 figfig. in a cross-sectional view along the line

9 - XII to Xll of figfig.;

Perspective view a configuration of a laser welding system application figfig. 13, in the

Integrated optical laser application welding head shown figfig. 8 - 12 shows, in a housing fastened together with a workpiece carrier.

[0013] Laser processing systems and method for moving a laser beam capable of shapes are described herein -, properties to be maintained constant during laser beam machining locations. The laser processing systems produce a collimated laser beam, having a constant power density in the Z direction along at least a portion of a length of the laser beam, in the X - or Y-direction and collimated laser beam dithering. By dithering the collimated laser beam on a three-dimensional surface to allow a constant laser processing, for example to provide a constant application of a coating in a laser application welding process. A laser processing system can comprise a beam transmission system, providing both the collimation and collimated laser and adjusting the beam dithering the diameter of the collimated beam.

[0014] The laser processing method according to embodiments described herein may - systems and a whole series of applications and three-dimensional surfaces are used. Laser processing applications include for example laser deposit welding, laser beam welding, the laser cleaning, material removal, surface hardening (e.g. marking, cutting or forming) and machining. Workpieces with three-dimensional surface, the turbine blades can be processed for example, valve seats and pipes comprise,, but not limited to are.

[0015] In the meaning used herein relates to a laser beam "collimated laser beam", has a relatively low beam divergence (e.g. a beam having a diameter of 10 mm and a smaller/equal to 1 mrad divergence), so that the radius of the beam propagation distances not subject to significant changes within-uniform. Does not require exact or perfect collimation with a "collimated laser beam" zero divergence. In the meaning used herein refers to a "constant power density in the Z direction" power per surface of a laser beam, the laser beam along a Z-axis of not more than ± 6% fluctuates 300 mm in a working area. A "constant power density in the Z direction" does not require power density, along the Z axis of the beam is exactly equal to the. In the importance "workpiece" used herein refers to an article or articles, are processed by a laser beam; the term can comprise a plurality of articles, the together (e.g. by welding together) are machined. In the "three-dimensional surface" used herein refers to a non-planar surface importance, which in the X -, Y is - and Z-direction. In the meaning used herein refers to the reciprocation of a laser beam towards "dithered" over a relatively short distance - (e.g. ± 10 mm or less) along an axis, said beam substantially perpendicular to the workpiece remains.

[0016] With reference to figfig. 1a - 1c in a laser machining method and a laser processing system 100 is according to embodiments described herein used a collimated laser beam 110, 102 a workpiece, for example with a three-dimensional surface 104, to process. The laser processing system 100 120 a laser system, which produces a laser output beam transmission system 130 and a generally comprises, from the laser system 120 coming the collimated laser beam to the workpiece 102 110 and collimated laser output transmits. The laser processing system 100 may also include a workpiece carrier 140, capable of holding a workpiece or supporting and moving the workpiece 102 during the laser processing. The workpiece carrier can further comprise linear and/or rotary stages 140, 102 can move into a plurality of different directions which the workpiece.

[0017] The collimated laser beam is directed onto the surface of the workpiece 102 110 104 and forms a light spot 112 on the surface 104, as in figfig. 1b shown. The light from the laser beam at the point 110 112 serves for machining the surface of the workpiece 102 104 energy delivered, by for instance, that the workpiece is heated sufficiently, so that application of weld material welded or adhered material or is removed. The collimated laser beam in a example has a Gaussian beam profile 110. The laser wavelength, the beam power, the beam power density and the beam profile can change from hanging from the application and generally, the material or the materials of the workpiece and/or other materials used in laser processing.

[0018] The collimated laser beam 110 represents a constant power density prepared in the Z direction, to maintain constant laser beam properties to different working points, for example at different locations of the three-dimensional surface 104, the laser light spot 112 being touched. As shown in figfig. 1c, the collimated laser beam 110 with the light point 112 provides substantially the same power density at a working place for example on the surface of the workpiece 102 104 as a collimated laser beam with a light point on another processing station 112a 110a. In a example with a beam diameter of 2 mm and a power of approximately 191 kw/cm in the power density would 6 kw² be. In this example the power density of the collimated laser beam 110, 110a at the processing area of the light spot on the 112 and should processing area of the light spot 112a about 191 kw/cm in² be. The collimated laser beam 110 a constant power density can thus providing a relatively large working distance in the Z-direction thereby providing a advantage over laser machining systems, where a focused beam is used with a power density, which varies along the Z-axis of the beam significantly.

[0019] The laser system 120 can comprise any suitable wavelength and a laser with each power, provide the desired laser processing. In particular the laser system 120 can comprise a glass fiber laser, capable of, to generate a laser beam having a relatively high power. In a example of a laser application welding system the laser system 120 a ytterbium glass fiber laser system, comprising capable of, PM is a laser beam having a wavelength of 1.07 and generate an output power ranging from 500 W to 50 kw, such as an IPG Photonics Corp. of YLS type 3000ct. For most applications the laser system provides a continuous wave laser (CW laser output) output 120, although modulated or pulsed laser may be used for some laser processing applications, for example provide a structured surface.

[0020] The collimated laser beam along the X-axis or Y-axis 110 can, as indicated by the arrows, are dithered, a laser processing in multiple directions and to allow several axes. For example can be used to dither a laser application welding application, to provide a desired temperature profile in a wider region of the workpiece 104, before the application welding powder is applied on the workpiece. Dithering the collimated laser beam 110 can also be used, to allow a continuous multi-directional application welding process. In laser welding dithering can be used application, to allow welding over a range, which is wider than the beam diameter. The direction, the speed and the amount of dithering technique can and/or shape of the surface of the workpiece depending on the application 104 102 vary. In a example can be provided in a range of ± 10 dithering a relatively fast response time of 10 hz to 100 hz mm. As described in greater detail hereinafter, the beam transmission system 130 can comprise different types of mechanisms for dithering the collimated laser beam 110.

[0021] The diameter of the collimated laser beam 110 (and thus the diameter of the light spot 112) also can be changed, for example for different processing applications, or for different areas for different workpieces on a single workpiece. As shown in figfig. 1b, the diameter of the collimated beam 110 can be increased for example, provide a light point 112b with a larger diameter. In a example of the diameter in a range of about 2 mm to 10 mm can be changed. As described in greater detail hereinafter, the beam transmission system 130 may further comprise a collimating optics, which is able, to change the diameter of the collimated laser beam 110.

[0022] The workpiece carrier 140 may also be able, the workpiece 102 along the X-axis, the Y-axis and/or the axis Z and/or the workpiece about an axis 102 to rotate this. The laser processing system 100 further comprises a motion control system 150, and/or dithering the collimated laser beam to control the movement of the workpiece 102 110. The motion control system 150 can comprise any type of programmable motion control system (e.g. a programmed computer), which is used, linear and/or rotary stages to control. Dithering the collimated laser beam 110 and the movement of the workpiece 102 can be coordinated by the motion control system 150, to produce a whole series of laser machining patterns on the surface of the workpiece (i.e. other than straight) 104 102.

[0023] Examples of patterns, a dithering of the collimated laser beam 110 by a coordinated movement of the workpiece can be produced with 102, figfig. 2a - 2d are illustrated. As shown in figfig. 2a, the laser beam can be dithered, 112 in the direction of the arrow 108 to move the light spot, the workpiece moves in the direction of the arrow 106 during, to form a coil-like pattern. This type pattern can be used in a welding application, for example to bridge the gap between two objects, which are welded together (e.g. thickness plates, which are butt welded), . In other words causes dithering, 112 such that the light spot moves across the gap, that the base material is drawn in the weld seam. This snake-like pattern figfig. 2b shows another modification, wherein the amount of dithering to the direction of the arrow 108 is increased in stepwise, the workpiece in the direction of the arrow 106 while moving. The amount of dithering technique may also be changed otherwise, other modifications to produce this pattern.

[0024] Figfig. 2c as shown, the laser beam can be dithered, the light spot in the direction of the arrow 108 or 109 of the arrow 112 to move, while the workpiece is moved in the direction of the arrows 106.107, a spiral or vortex pattern to form. This type pattern can be used in a laser application welding application, for example applying a coating, in the center of the workpiece and then starting the worked outward therefrom. In other words this type can advantageously be used pattern, apply a coating in multiple directions with a relatively continuous movement, rather than using the conventional engraved pattern in only one direction, wherein the system must be stopped and dangers. 2D shows another modification of a pattern from a series of figfig. circles, in the direction of the arrow 108 formed by dithering the beam or of the arrow 109, the workpiece in the direction of the arrows during 106, 107 is moved. Dithering the collimated laser beam thus makes possible pattern, providing a coating on a large number of different kinds of a welding surface dynamically, including three-dimensional surfaces.

[0025] 3A and 3b show different embodiments of a laser processing system 300 figfig., 300' with different mechanisms for a dithering a adjustable collimated laser beam 310. In both laser processing systems 300, 300' comprises beam transmission system 330 collimation lens 332, 334, 336. A pair of adjustable lens 332, 334 (e.g. as used in a telescopic arrangement) provides a collimated beam 310, the diameter of which can be adjusted, or both by a lens 332, 334 are moved. A collimating lens is fixedly mounted and provides the last last 336 310 collimation of the collimated laser beam. Example the first collimating lens is adjustable in a range of about 8 mm and the second collimating lens 332 in a 334 is adjustable in a range of about 40 mm, divisibility of the beam diameter to provide a one in the range from about 2 mm to 10 mm. In a example it may be at the first collimating lens is a convex lens 332 and the second collimating lens 334 is a concave lens. There are also other types of lenses may be used, the collimation of the laser beam are capable.

[0026] In one embodiment, shown in 3a figfig., collimated laser beam 310 is the adjustable dithered, the optics of the system moved by beam 330, without moving the glass fiber laser output. In this embodiment the optics of the beam transmission system 330 is moved, a support structure is moved by 331, 332 carrying the collimation lens, 334336. In particular the supporting structure is mounted on a X-Y stage 360 331 of the optic, which provides a linear movement along the X - and Y-axis and in the linear movement of the collimating lens 332, 334, 336 along the X - and Y-axis causes.

[0027]Aglass fiber laser unit by a termination pad terminal 326 324 conclusion is optically connected with the beam transmission system 330 and mounted, that the collimation lens 332, 334, 336 moving, without the glass fiber laser output moved. By a movement of the collimating lens 332, 334, 336 in a direction, either extending along the X-axis or the Y-axis, relative to the glass fiber laser output is effected, that the output of the collimated laser beam output from the beam transmission system 330 310 optically moves in an opposite direction, which runs along the X-axis or the Y-axis. The X-Y stage 360 of the optic moves the collimation lens 332, 334, 336 for example in a range, sufficient, to move in a range of ± 10 mm in collimated laser beam 310. Only the optics is moved, without the entire head including the collimated laser beam 310 is moved glass fiber laser output can, with a relatively fast response time be dithered.

[0028] In an additional embodiment, shown in figfig. 3b, collimated laser beam 310 is the adjustable dithered, without moving the laser output by the glass fiber optics is moved directly. The glass fiber laser output can be 324 by moving a termination block, of a glass fiber laser closes, or moved by moving a termination pad terminal 326, the block connecting the conclusion 324 with the beam transmission system 330, directly. In this configuration a X-Y stage is connected with either the end of the glass fiber laser output 328 324 or the termination block of the block terminal 326, provide the movement, causes the block 324 to the end next the dithering the glass fiber laser output. In a example wherein the termination block of a quartz block 324 and 326 is a quartz block holder at the conclusion the block terminal connection (QBH terminal). The X-Y stage in a example of the glass fiber laser output comprises one or more piezoelectric motors or 328 (PZT motors or actuators -) actuators. The end block of the block 324 or conclusion of terminal 326 is moved, to move the glass fiber laser output directly, an even more rapid response time can thus be provided.

[0029] Dithering the collimated laser beam 310 by moving the optics or by moving the glass fiber laser exclusive exclusive output, as described above, help further carries, the collimation of the beam maintain during processing. Thus the constant power density in the Z direction of the collimated laser beam 310 can be maintained, when the laser beam is dithered during processing. Although the illustrated embodiments are capable of a dithering technique in the X-direction or in the Y direction, in further embodiments steps can be used, the providing a linear movement along an axis only.

[0030] In both embodiments can dithering the collimated laser beam 310 are coordinated with the movement of the workpiece 302. In the shown system is a motion control system 350 with a figfig. 3a in the X-Y stage 340 of the workpiece carrier with the X-Y stage 360 of the optic and is connected, to control movement of steps 340, 360 and coordinate with the movement of the workpiece 302 dithering the collimated laser beam 310. Wherein in figfig. 3b 350 is connected with both the motion control system shown system is a X-Y stage 338 of the glass fiber laser output with the X-Y stage 340 and the workpiece carrier, to control movement of steps 338, 340 and coordinate with the movement of the workpiece 302 dithering the collimated laser beam 310.

[0031] With reference to 4 - 6 now is a design of a beam transmission system 430 figfig. with movable optics described in detail. The beam transmission system a support structure 430 431, 432 carrying the collimation lens, 434, 436 comprises. The collimation lens 432, 434, 436 carried by the frame and support structure are secured in such 431, 432 that the collimation lens, 434, 436 are oriented so, that the laser beam from the first collimating lens collimating lens 436 432 can pass through to the last. As shown in this configuration, the first and second adjustable lens may include 432, 434 water cooled lens, to prevent a gap forming due to the laser energy.

[0032] The support structure is supported on a linear X-Y stage 431 460, for movement in X-Y direction as described above to allow. The linear X-Y stage in a first direction 460 comprises a linear actuator for providing linear movement acting 462 in the X-direction and a linear actuator in a second direction for providing a movement in the Y direction acting 464. In the illustrated embodiment the linear actuators comprise 462, a carriage, the lead screw along slides on a motor 464. In further embodiments the linear actuators may include any actuator Type, capable of, provide a linear motion with the desired response time, a linear motor or a piezoelectric motor including inter alia (PZT motor).

[0033] The adjustable collimating lens 432, 434 or 435 433 on Z-axis carriage mounted for movement in the Z direction. The Z-axis carriage 433, 435 are slidably supported by the support structure and through the linear actuators 437 439 431 or moved, which are mounted on the supporting structure (see figfig. 6) 431. In the illustrated embodiment the linear actuators comprise 437, 439 motorized leadscrews. In other embodiments other types of linear actuators may be used.

[0034] With reference to a laser welding system 700 according to embodiments of the applicator is figfig. 7 present disclosure shown and described. The laser application welding system 700 a application material transfer system 770, 780 attached to an optical housing, which encloses a beam transmission system as described above comprises for example 730. The output optical fiber connected to the optical housing 780 722 of glass fiber laser with a termination block of such terminal 726, that the glass fiber laser output (i.e. a glass fiber termination blocks aligned 724) on the beam in the optical transmission system 730 780 housing and connected optically.

[0035] In this embodiment comprises the application material transfer system 770 772 a nozzle for transferring an application powder material together with a high speed gas to the workpiece, such as in international patent applications publication number wo 2013/061 085 wo 2013/061 086 and described, reference in this document are inserted by literature. The application material 770 is connected to a powder transfer system and a transmission line 774 776 gas channel, or the application of gas - powder material supply. In other embodiments the application material can be configured transmission system, transmitted from application material that other forms, such as a wire, .

[0036] The optical housing further encloses an X-Y stage 760 780 the optics, the beam transmission system 730 in the X-direction or Y-direction as described above to move. Alternatively the housing may enclose a X-Y stage 728 of the glass fiber laser 780 output, either to move the glass fiber termination unit or the glass fiber termination unit 724 726 terminal. A motion control system can control the movement of the X-Y stage 750 760 of the optic or the X-Y stage 728 of the glass fiber laser output, to control movement of the workpiece in coordination with the dithering the collimated laser beam 710 702 as above discussed.

[0037] In operation the beam transmission system 710 730 can collimated laser beam on the workpiece before the message can be dithered and powder material, to provide a desired temperature profile on the workpiece 702. The collimated laser beam 710 can be dithered in coordination with the movement of the workpiece on the workpiece also 702 702, to apply the coating in various patterns, for example allowing the build-up welding on three-dimensional surfaces.

[0038] 8 - 12 Is a design of an integrated optical figfig. referring to now laser application welding head 800 described in detail. The integrated optical laser application welding head 800 comprises a projected powder transfer system 870, 871 with an angle attached to an optical housing 880, which is a beam transmission system 830 (see figfig. 11) surrounds. In this configuration the beam transmission system 830 comprises a movable optics for dithering a collimated laser beam, as shown in 4 - 6 and described above figfig.. A quartz block holder terminal (QBH terminal) is connected to the optical housing such 826 880, aligned on the beam transmission system that quartz block 824 830 and optically connected to this (see figfig. is 11). A victim window is located at the opposite end of the optical housing 880 882, to enable, that the collimated laser beam is directed from the optical housing 880 out onto a workpiece.

[0039] The application powder transmission system for transmission of the applicator comprises a nozzle 872 870 powder material together with a heated gas at high speed. Although the nozzle is fixed relative to the optical housing 880 872, dithering the collimated laser beam, provided by the beam transmission system 830 allows, that the laser beam incident on the workpiece can be moved relative to the powder.

[0040] In this configuration is further comprising a monitoring system on the optical housing secured housing 890 880. The monitoring system monitoring systems for monitoring a welding machining surrounds housing 890, such as a pyrometer for monitoring the temperature of said working area.

[0041] As in figfig. 13 shown, can the integrated optical laser application welding head relative to a workpiece carrier 840 899 800 in a housing be attached, supports and moves a workpiece. In the illustrated embodiment of the workpiece holder 840 is a robot arm, the rotating and moving the workpiece in the X - the workpiece, Y is - and Z-direction can. Thus the integrated optical laser application welding head 800 remains fixed, while moving the workpiece from the workpiece carrier and/or the collimated laser beam 840 in the optical housing is dithered 880.

[0042] Laser processing systems and method embodiments described herein - are accordingly capable, more complex three-dimensional surfaces by dithering the laser beam machining, laser beam machining locations properties to be maintained during constant.

[0043] While the principles of the invention have been described present, it is obvious for experts, this description is exemplary only and not limiting the scope of the invention. In addition to the exemplary embodiments, the present are shown and described, further embodiments of the present invention are conceivable within the perimeter. Changes and replacements by the average skill of the present invention located within the perimeter considered, except by the following claims not limited by the.