CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims the benefit of co-pending U.S. Provisional Patent Application Serial No. 62/252,033, filed on November 6, 2015, which is fully incorporated herein by reference.

TECHNICAL FIELD

[0002] The present invention relates to laser processing systems and more particularly, to a modular processing system and enclosure.

BACKGROUND INFORMATION

[0003] Laser processing systems may be used for a variety of processing applications including, without limitation, marking, welding, cladding, cutting and drilling. Different processing applications often involve different types of lasers, laser processing heads, and part handling mechanisms. A laser processing system used for such applications may include an enclosure for enclosing the processing area to prevent user access during operation, for example, providing Class 1 laser safety. Such enclosures are often designed for a particular laser processing head and part handling mechanism and may thus limit the versatility of the laser processing system.

BRIEF DESCRIPTION OF THE DRAWINGS

[0004] These and other features and advantages will be better understood by reading the following detailed description, taken together with the drawings wherein:

[0005] FIG. 1 is a schematic diagram of a modular laser processing system including a modular laser processing enclosure, consistent with embodiments of the present disclosure.

[0006] FIG. 2A is a top perspective view of a modular laser processing enclosure for a laser processing system, consistent with an embodiment.

[0007] FIG. 2B is a right side view of FIG. 2A. [0008] FIG. 2C is a left side view of FIG. 2A.

[0009] FIG. 2D is a front view of FIG. 2A.

[0010] FIG. 2E is a rear view of FIG. 2A.

[0011] FIG. 2F is a top view of FIG. 2A.

[0012] FIG. 2G is a perspective view of the modular laser processing enclosure in FIG. 2A with a robotic placement arm for part handling.

[0013] FIG. 3 is a close-up side perspective view of a cover plate covering a laser processing access opening in an enclosure housing of the modular laser processing enclosure shown in FIG. 2A.

[0014] FIG. 4 is a close-up side perspective view of a part loading plate having an opening providing access to a laser processing area within the enclosure housing shown in FIG. 2A.

[0015] FIG. 5 is a close-up side view of a laser system connection plate on a lower side of the enclosure housing shown in FIG. 2.

[0016] FIG. 6 is a perspective view of a control cabinet for enclosing a fiber laser, controls and other laser system equipment for use with the modular laser processing enclosure shown in FIGS. 2.

[0017] FIG. 7 is a perspective view of one example of a laser processing system including a modular laser processing enclosure surrounded by an external wire mesh enclosure, consistent with an embodiment of the present disclosure.

[0018] FIG. 8 is a perspective view of the laser processing system in FIG. 7 without the external enclosure.

[0019] FIG. 9 is a side perspective view of the laser processing system in FIG. 7 showing part handling mechanisms located in laser processing access openings of the modular laser processing enclosure.

DETAILED DESCRIPTION

[0020] A modular laser processing enclosure, consistent with embodiments of the present disclosure, is capable of being used with different laser processing heads and part handling mechanisms to form a modular laser processing system. The modular laser processing enclosure generally includes an enclosure housing defining a laser processing area and multiple laser processing access openings for accessing the laser processing area. The modular laser processing enclosure further includes one or more plates that may be removably mounted over the laser processing access openings to allow use with different laser processing heads and/or part handling mechanisms in different configurations for different applications. The modular laser processing system may be a Class 1 laser system for use with different applications including, without limitation, cutting, drilling, welding, cladding and marking.

[0021] Referring to FIG. 1, an embodiment of a modular laser processing system 100 generally includes a modular laser processing enclosure 110, a laser processing head 130 mounted to the laser processing enclosure 110, and a part handling mechanism 140 mounted to the laser processing enclosure 110. The laser processing enclosure 110 includes an enclosure housing 112 defining a laser processing area 114 with multiple laser processing access openings 115, 116a-d for accessing the laser processing area 114. A top laser processing access opening 115 is located at a top of the enclosure housing 112 and one or more side laser processing access openings 116a-d are located on one or more sides of the enclosure housing 112.

[0022] Although four side access openings 116a-d are shown, the enclosure housing 112 may include less than four side access openings. The enclosure housing 112 may include, for example, only two opposing openings 116a, 116d or only two adjacent openings 116a, 116b. The enclosure housing 112 may also include additional openings on one or more sides. In the illustrated embodiment, the enclosure housing 112 is configured as a tower with a rectangular shape such that the side access openings 116a-d are located near the top and on each of the four sides. Each of the sides of the enclosure housing 112 may have the same width such that the enclosure housing 112 has a square cross section and each of the laser processing access openings 115, 116a-d may have substantially the same dimension.

[0023] The modular laser enclosure 110 also includes panels or plates 120, 122, 124 for covering one or more of the laser processing access openings 115, 116a-d. The plates 120, 122, 124 may have substantially the same size such that the plates are configured to cover any one of the laser processing accessing openings 115, 116a-d. A processing head plate 120, for example, is configured to be mounted to the laser processing head 130. In the illustrated embodiment, the processing head plate 120 is used to mount the processing head 130 to the top laser processing access opening 115, although the processing head plate 120 may be used to mount the processing head 130 to any of the side laser processing access openings 116a-d. A part loading plate 122 may define an opening (e.g., a circular opening is shown) for receiving and/or guiding the part handling mechanism 140 to the laser processing area 114. The part loading plate 122 may also be configured to be mounted to the part handling mechanism 140. A cover plate 124 may also be used to completely cover one or more of the access openings. The cover plate 124 may be opaque or may include a transparent window (not shown) that allows viewing of the laser processing while protecting an observer from the laser.

[0024] The modular laser enclosure 110 also includes a laser system connection plate 129 covering a laser system connection opening in the enclosure housing 112. The laser system connection opening and plate 129 is shown located proximate a bottom of the enclosure housing 112 but may also be located in other locations. The laser system connection plate 129 may provide for a connection between laser system equipment (e.g., controls, electronics, power source, gas sources, smoke vacuums) and the laser processing enclosure 110. The laser system connection plate 129 may include, for example, feedthroughs or connectors that connect to cables or conduits. The laser system connection plate 129 may also include holes for accessing cables and equipment located inside the laser enclosure 110. In one example, a light (e.g., an LED) may be provided inside the laser enclosure housing 112 via the laser system connection plate 129.

[0025] A control cabinet 150 may be used to house other components of the laser processing system, such as the fiber laser, gas sources (e.g., process gas and/or shielding gas), vacuum, controls, and other electronics. The fiber laser may provide a wavelength and power depending upon the application and may include fiber laser sources available from IPG Photonics

Corporation. One example of the fiber laser may include a quasi-continuous wave (QCW) Ytterbium laser source providing a power between 10 to 1000 W.

[0026] The laser processing head 130 may include, without limitation, a laser cutting head, drilling head, welding head or marking head available from IPG Photonics Corporation. The part handling mechanism 140 may include, without limitation, a robotic placement arm, a part conveyor, and a part holder or stage. The modular laser processing enclosure 110 may thus be configured or reconfigured relatively easily for different types of laser sources, laser processing heads, and part handling mechanisms to be used for a variety of different applications.

[0027] Referring to FIGS. 2A - 2G, an example embodiment of a modular laser processing enclosure 210 is shown and described in greater detail. In this embodiment, the modular laser processing enclosure 210 includes an enclosure housing 212 and a part handling support 218 mounted together on a base 219. The enclosure housing 212 defines a laser processing area 214, which may have a volume of about 6x6x6 inches. The base 219 may be sufficiently

dimensioned to provide stability and may include adjustable feet 217. The part handling support 218 is shorter than the enclosure housing 212 to support a part handling mechanism for access to the laser processing area 214.

[0028] Plates 220, 222, 224, 228 are mounted to the enclosure housing 212 at each of the laser processing access openings. The processing head plate 220 mounts a laser processing head 230 to a top access opening. The part loading plate 222 mounts to a side laser processing access opening and is configured to receive a part for laser processing. As shown in FIG. 2G, a robotic placement arm 240 may be used as a part handling mechanism and may be mounted on the part handling support 218. The robotic placement arm 240 may thus be operated to place parts inside the laser processing area 214 via an opening in the part loading plate 222. Other part handling mechanisms may also be used, such as a part conveyor belt that passes through access openings on opposite sides of the enclosure housing 210.

[0029] FIGS. 3-5 show embodiments of different types of plates in greater detail. As shown, each of the plates 220, 222, 224, 228, 229 may be mounted to the enclosure housing 212 with threaded fasteners 225 at the corners of the plates. The processing head plate 220 is also mounted to the laser processing head 230. The part loading plate 222 includes a round opening 223 that provides access to the laser processing area 214, for example, to allow the robotic placement arm to place the workpiece within the laser processing area 214 for laser processing. The cover plates 224, 226, 228 completely cover side access openings in the enclosure housing 212. At least one of the cover plates 226 (see FIG. 2G) includes a transparent window for viewing the laser processing area 214. The laser system connection plate 229 is mounted over a connection opening proximate the base of the enclosure housing 212.

[0030] FIG. 6 shows one example of a control cabinet 250 for housing laser equipment, such as the fiber laser source, the gas source(s), the controllers, and other electronic equipment. The control cabinet 250 may be located near the modular laser processing enclosure 212 and connected via cables and/or conduits.

[0031] Referring to FIGS. 7-9, another example embodiment of a modular laser system 700 is shown. In this embodiment, a modular laser enclosure 710 is surrounded by an external enclosure 760 such as a wire mesh enclosure. As shown in FIGS. 8 and 9, the modular laser enclosure 710 includes an enclosure housing 712 having a rectangular tower configuration with laser access openings 716 on at least three sides and the top of the housing 712. A processing head plate 720 mounts a laser processing head 730 to the top access opening. In this

embodiment, part handling supports 718, 717 are mounted on sides of the enclosure housing 712. A camera 770 or other inspection device may also be mounted to the enclosure housing 712.

[0032] In this embodiment, a robotic placement arm 740 is mounted on the part handling support 718 and used to obtain the parts from rotary part holding station 742 and to place the parts within the laser processing area through one of the laser processing access openings 716. A rotary stage 744 is mounted within an opposing access opening to receive the parts from the robotic placement arm 740 for processing. A part collection chute 746 receives the processed parts and delivers the processed parts through another access opening to a part collection bin 748 on the part handling support 717. Thus, this embodiment of the modular laser enclosure 710 uses three laser processing access openings for part handling and uses the top access opening for the laser processing head.

[0033] Accordingly, a modular laser enclosure, consistent with embodiments described herein, may be used to provide a modular laser system having a variety of configurations for a variety of different applications. The modular laser enclosure thus enables a more versatile and compact Class 1 laser system.

[0034] While the principles of the invention have been described herein, it is to be understood by those skilled in the art that this description is made only by way of example and not as a limitation as to the scope of the invention. Other embodiments are contemplated within the scope of the present invention in addition to the exemplary embodiments shown and described herein.

Modifications and substitutions by one of ordinary skill in the art are considered to be within the scope of the present invention, which is not to be limited except by the following claims.