Field of the invention

[0001]The invention refers to a machine for 3D processing of volumetric metal objects with random shapes and sizes, in particular for thermal and / or laser cutting of holes and random contours in metal cabinets in their assembled state, where the treated surfaces may be tilted, as well as non flat configuration. The machine is also suitable for processing of sheet materials.

Background of the invention

[0002] Various areas of industry require manufacturing of volumetric metal cabinets, which are intended to contain electrical regulating, switching and controlling elements with various purposes, as well as elements with other purposes. Such metal cabinets are manufactured first separately, such as bottom side, back side, doors, internally dividing elements or partitioning elements, and then mechanically assembling all the elements according to the specific requirements for the metal cabinet, or welding them into a permanent single-piece construction. On the surrounding and interna! surfaces of the finished metal cabinets certain elements must be installed.

[0003] There are known machines for processing of metal cabinets, in particular those for creating openings in electrical cabinets designated for installation of technical elements with various purposes, where the openings are shaped by milling and thermal cutting.

[0004] The execution of various openings and slots is achieved either by processing the individual surrounding surfaces/planes by manually re-positioning (turning) of the cabinet towards the working area of the machine when the cabinet is monolithic, or by sequentially processing the individual components after disassembly. The processing of metal cabinets in this manner requires many manual operations, which not only result in loss of time, but also introduce inaccuracies due to re-positioning. [0005] There are known machines for laser catting of flat sheet metal, which consist of cross beam which moves over the working table which is designed for the emplacement of the processed object, for example, a flat metal sheet.

[0006] A combined machine for laser cutting and drilling of a flat sheet metal is known, EP0491747B 1 , which consists of a frame with w orking table, w herein onto the frame, on a portal construction of vertical and horizontal beams, i attached a movable manipulator with a laser cutting head mounted on it, with the option for movement along a coordinate system with two mutually orthogonal axes X and Y.

[0007] A machine for combined laser cutting and drilling of a flat metal sheet is known, EP2444195, which consists of an immovable C- shaped frame, wherein a coordinate table, with the option for movement along a coordinate system with two mutually orthogonal axes X and Y, is mounted onto the lower part of the frame, while to the upper part of the frame are fixed a laser cutting head and a drilling head, each driven by a separate driving mechanism, preferably - by linear motors.

[0008] The shortcoming of the known laser cutting machines is expressed in their limited application - for example they are only for cutting sheet materials as their construction, particularly that of the driving mechanisms and the freedom of movement of the cutting head, does not allow the processing of volumetric objects.

[0009] The field of electrical engineering requires the manufacturing of metal cabinets, which are intended to contain electrical regulating, switching and controlling elements with various purposes, as well as elements with other purposes, on a surface with general position in space.

Technical field of the invention.

[0010] Taking into account the above stated known level of technology in this area, the aim of the invention is to propose a machine for the processing of metal cabinets, which allows for processing of the surrounding surfaces of large objects via thermal cutting, while providing high precision of processing of aii openings and / or slots. [001 1 ] The above mentioned aim is achieved with a machine for treating volumetric metal objects in an assembled state, which is a five-coordinate CNC /computer numeric control/ machine, with respectively three transiational and two rotational digitally controlled axes, which provide the option for arbitrary placement of the working body in space and smooth movement along the entire range of motion.

[0012] The machine consists of a frame, wherein on the low er part of the frame is mounted a table, with option for manipulator with movement along a coordinate system with two mutually orthogonal axes X and Y, cutting tool and a drilling head powered by a separate drive mechanism.

[0013] According to the utility model, at the outer/end parts of the frame, on the horizontally oriented beams are installed and fixed linear guide ways defining the Y axis, on top of which are placed two vertically oriented carriages, parallel to each other, wherein the carriages are connected at their upper ends to a cross beam, oriented along the X-axis and perpendicular to the Y axis.

[0014] On the cross beam are installed at least two linear guides, to which a horizontally oriented carriage is connected, with the option of movement along the X axis, while a ram is attached to the carriage with guide ways installed to it, which move with the carriage along the X axis and provide the option for vertical motion along the Z axis.

[0015] At the lower end of ram are installed two rotating axes, respectively "C" axis, which can rotate around a vertical axis, and "8" axis which can rotate around the horizontal axis, wherein the driving mechanism of the ^{i =} B ^" axis is mounted onto the driving unit of the "C" axis, and onto the driving unit of the "C" axis is mounted a driving unit of an additional transiational "LI ' axis, equipped with a movable carriage, onto which the cutting tool is attached and the axis of the carriage and the tool are coaxially oriented.

[001 6] In the machine for processing cabinets in an assembled state, a fiber laser with an impulse operation mode is used as the acting cutting tool. In a sample version of the machine, subject of the utility model, the driving mechanism of "B" axis is installed onto the actuation unit of the "C" axis.

[001 7] It is preferable that the additional relaying axis "LH" be coaxial to the axis of the cutting head, as this movement is used to compensate for the lack of flatness of the processed surface and to maintain a constant distance between the cutting head /for example laser head/ and the metal surface.

[001 8] For achieving a smooth movement of the driving mechanisms of translational axes X, Y, Z and the rotary axes B and C, each movement is accomplished with mechanisms without internal clearance(backiash), using ball screws and wave gearboxes.

[0019] According to one optional execution of me machine, the translational axes X, Y, Z are driven by linear motors, and the rotational axes B and C are driven by rotary motors.

[0020] Depending on the processing of particular volumetric object, secondary work head can be installed on the translational axis LH , which can be drilling or threading head.

[0021 ] In accordance with the utility mode!, the machine for processing of volumetic objects from metal differs by its higher capacity for processing slots and holes in the surrounding faces of metal cabinets, which is made through five- coordinate machine with Computer Numerical Contro!(CNC), respectively having three translational and two rotational digitally controlled axes, providing opportunity for arbitrary positioning of the processing unit in the sp¾ce and smooth motion along the whole stroke .

[0022] The described opportunities allow significant decrease of the labor intensity and the time for processing volumetric metal cabinets, designated for the electric industry as well as for processing of volumetric metal objects, o roch require various operations by type and nature in their internal space. Brief Description of the Drawings

[0023] In the below description will be presented an example of the machine for processing of metal volumetic objects in assembled state, made visual by the accompanying drawings, whereas:

Fig. 1 - shows general axonometric view of the machine

Fig.2 - kinematic scheme of the machine for ocessing e bhreos .r. assembled state

Detailed Description of the invention

[0024] One embodiment of the machine for processing of outer surfaces of volumetic objects in assembled state according to the utility mode! is described below as the constructive elements used and their mutual orimrtarior: do not restrict the use of other equivalent elements or materials w ih the same properties and functionality.

[0025] The machine for processing of volumetric objects is suitable for processing of metal cabinets for the electric industry wherein i assembled >t?te on the body of the metal cabinet is possible to be cut slots, holes or other cuts, determined in advance by location, form and size.

[0026] The machine consists of frame 1 , places on four leveling legs 2 thereupon on frame 1 is fixed working table 3, on the top surface or whicr is placed the processed volumetric object 4 - cabinet or two-dimensional object - sheet material. At the outer parts of the frame 1 on a horizontally oriented beams 5 are fixed lineal ^* guide ways, on which are placed iwo vertical iy oriantaa carriages 6, parallel to each other. In their upper part the carnages ό are eonnee mu with cross beam 7, horizontally oriented towards X axis, which beam is positioned perpendicularly toward the Y axis.

[0027] On the cross beam 7 are installed at least iwo linear guide ways, to which is horizontally attached carriage 8, having the option to mo e along X axis. Ram 9 is installed to the carriage-8, with an option to move in vertical direction aiong Z axis, as at the same time it carries guide ways along the mentioned Z axis, which guide ways move along X axis through the carriage 8. [0028] At the bottom of the ram 9 are instal led two rotary axes, respectively- vertically oriented "C" axis 10 and "B" axis 1 ! perpendicular to the "C" axis 10, equipped with driving mechanism. Thus the driving mechanism of "8 ^" axis 1 1 is installed on the processing unit of "C" axis 10. At the processing unit of C" axis 10 is installed also driving mechanism of a secondary translational ' ^" LH" axis 12, equipped with movable carriage (saddle), on vvhic is fixed cutting tool, for example laser head 13, as the "B" 1 1 axis and the carriage ^" LH ^"* 12 have perpendicular axes.

Machine operation according to the invention

[0029] The machine for processing of metal cabinets, in assembled state according to the utility model is used in the following way: the processed object, for example assembled body of a metal cabinet, designated for installation of electro-technical elements has to be placed on a worktable-3 on a certain position from the machine's coordinate system. The processing is realized consequently surface after surface, according to a program, set in advance in the CMC (Computer Numerical Control) system.

[0030] By driving the described three translational axes X, Y, Z is provided the necessary accurate positioning in the working -Okime of the machine and the rotation around the vertical and horizontal axis rwowder the norma! " ^' _. perpendicular to the processed surface) positioning of the cutting laser head 1 3 to tne respective processed surface. An additional translational analog axis coaxial to ihe axis of the cutting head 13 provides a constant distance between the orkin mol and the processed surface by compensating the deviation from t e nominal location (for example the non-flatness of the flat surfaces), \ m!ch Is necemwy ^· rr normal functioning of a thermal cutting.

[0031] The drive of the rotary axes "B" and "C ^,: and transiaiionai axes ^" X" "Y" "Z" is performed by mechanisms without backlash, which allows high accuracy and smoothness of movement of the working head.

[0032] An additional option is threading of drilled holes. For this purpose is mounted tapping device positioned coaxial with the cutting head, it is not shown on the figures.