EP3946962A1 - Verfahren und vorrichtung zum markieren von aneinanderreihbaren elektrischen geräten - Google Patents
Verfahren und vorrichtung zum markieren von aneinanderreihbaren elektrischen gerätenInfo
- Publication number
- EP3946962A1 EP3946962A1 EP20712222.7A EP20712222A EP3946962A1 EP 3946962 A1 EP3946962 A1 EP 3946962A1 EP 20712222 A EP20712222 A EP 20712222A EP 3946962 A1 EP3946962 A1 EP 3946962A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- marking
- laser head
- support rail
- planes
- receptacle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 78
- 230000033001 locomotion Effects 0.000 claims abstract description 66
- 238000011156 evaluation Methods 0.000 claims description 9
- 238000003384 imaging method Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 description 14
- 238000002372 labelling Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 238000000576 coating method Methods 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
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- 238000013507 mapping Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003708 edge detection Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003550 marker Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 238000001454 recorded image Methods 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000012913 prioritisation Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/24—Ablative recording, e.g. by burning marks; Spark recording
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
- B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
- B41J3/4073—Printing on three-dimensional objects not being in sheet or web form, e.g. spherical or cubic objects
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
Definitions
- the invention relates to a method for marking electrical devices which can be lined up and which are arranged on a mounting rail with the aid of a laser head.
- the support rail can be pivoted in its longitudinal axis and the laser head is guided to be movable at least along the longitudinal axis of the support rail.
- the invention also relates to a marking device suitable for carrying out the method.
- Mounting rails are used to snap on electrical devices in installation technology. Especially in apparatus engineering, pre-assembled support rail sections are often used, which are then installed on site in control cabinets, which have a large number of electrical devices arranged next to one another. Among the electrical devices there are often series terminals, each of which in turn has a plurality of connections. In order to facilitate wiring of the arrangement within the switch box, the individual devices and their connections can be marked, for example by having corresponding marking areas.
- the publication WO 2010/057768 A1 shows a device with which the support rails can be equipped with electrical devices, in particular series terminals, in an automated manner.
- a printing unit is provided which prints an electrical device removed from a magazine on its marking surfaces before it is mounted on the mounting rail.
- the mounting rails are first fitted with the electrical devices and then the devices are marked.
- the cited document describes a marking device that has a mounting rail receptacle and a laser head that applies the desired markings on the marking fields of the devices.
- the mounting device for the support rail is coupled to a linear and swivel device so that the support rail with the electrical devices can be moved and pivoted in front of the laser head in order to be able to move the marking fields to be labeled into the labeling area of the laser head.
- mounting rails are used that have a length in the range from one to over one meter and can be equipped with a variety of electrical devices. It can be provided that each electrical device is marked at several positions, possibly with different orientations. Overall, a large number of markings can thus be applied for a mounting rail, the marking process itself and the pivoting processes of the mounting rail and movement processes of the laser head taking time.
- a method according to the invention of the type mentioned at the outset is characterized by the following steps: A number of marking instructions is specified, each of which comprises a marking content, a position and an alignment of the area to which the marking content is to be applied. The marking instructions are then grouped into marking planes in such a way that all marking instructions of a marking plane can be applied by the laser head without moving the laser head or the mounting rail, the marking planes differing in terms of location coordinates and / or parameters for the laser head. A first of the marking planes is selected and - in accordance with the location coordinates of the selected marking plane - the laser head is positioned and / or the mounting rail is pivoted. Markings with the parameters for the laser head according to the marking instructions are applied to this selected marking plane.
- a next one of the marking planes is selected for marking, this selection being made on the basis of the movements of the laser head and the mounting rail that would be necessary in order to be able to apply markings according to the next marking plane.
- the markings are first grouped in so-called marking planes so that markings that can be applied with the same positions of the laser head and mounting rail and the same settings of the laser head are bundled. This prevents unnecessary movements and changes to the settings. In particular, unnecessary movements cost time, which prolongs the marking process.
- the individual groups are then processed in the most efficient order possible, taking into account the movements to be made when changing to the next marking level, which also avoids unnecessary movements when positioning the laser head or the mounting rail.
- the steps of positioning the laser head and / or pivoting the mounting rail, applying the markings and selecting the next one of the marking levels are repeated until all the marking levels have been processed.
- the term “electrical device” is to be understood as any device with a mounting rail receptacle for arrangement on a mounting rail. These are, for example, purely passive series terminals, but also devices with switching or fuse elements, such as Automatic circuit breakers fall under the term “electrical device”, just like devices with electronic components that can be placed on a mounting rail.
- the next of the marking planes is selected in such a way that pivoting of the support rail is preferred to movement of the laser head in the longitudinal direction.
- the different movement processes are accordingly weighted differently when the next marking level is selected.
- priority values are assigned to the remaining, not yet processed marking planes based on the location coordinates of the marking planes, and the next marking plane to be processed is selected using the priority values.
- a procedure can be Carry out well systematically and adapt to the technical properties of the marking device.
- the location coordinates of the marking planes can be used to determine which movements of the laser head and / or the mounting rail are necessary, with different movements being assigned different priority indicators.
- the priority codes enable the method to be optimally adapted to the properties of the marking device. The priority numbers of necessary movements are then added up in order to obtain the priority value of a marking level.
- a movement of the laser head in the longitudinal direction is assigned a higher priority code than a pivoting of the mounting rail, if lower priority values are preferred in the selection.
- the pivoting can be carried out more quickly than a movement of the laser head in the longitudinal direction, which is taken into account accordingly by this reflecting priority figures.
- Movements of the laser head in a direction other than the longitudinal direction can be assigned lower priority codes than a movement of the laser head in the longitudinal direction. Shifting the laser head in such other directions of movement serves e.g. a change in the distance of the laser head from the devices to be labeled, and in order to reach areas that are further up or down on the devices.
- an image of at least one section of the mounting rail and at least one electrical device is created by an image capture device. Based on an evaluation of the image, at least one of the positions at which one of the marking content is to be attached is then corrected.
- the actual position of a marking field that is to be labeled can differ from the intended position, particularly in the case of longer equipped support rails. The reasons are unavoidable size tolerances of the individual devices or their not completely gap-free or slightly inclined arrangement on the mounting rail, as well as a change in size due to temperature and / or ambient humidity. Especially with longer mounting rails, these size tolerances or deviations or gap dimensions can add up so that actual marking positions deviate from calculated positions by a few millimeters (mm).
- the image is preferably created and evaluated before the step of grouping the marking instructions in marking planes, the grouping then being carried out on the basis of the corrected positions.
- the corrected position is already taken into account when the markings are allocated to the various marking groups. This ensures that a marking located on the edge of a marking area can actually be created at its corrected position and, as a result of the correction, does not end up in an area that is no longer accessible at the given position of the laser head.
- the receptacle is mounted pivotably about its longitudinal axis, and the laser head is displaceably guided in at least one longitudinal direction which runs parallel to the longitudinal axis of the receptacle.
- the device has a control device which is set up to carry out such a method.
- a linear guide with a displaceable slide on which the laser head is mounted directly or indirectly is arranged parallel to the receptacle. Provision can be made for the laser head to be mounted on the slide via one or more further linear guides that run perpendicular to the linear guide.
- An additional additional linear guide in the horizontal direction makes it possible to bring the laser head at a suitable focus distance from the area to be marked, if the laser head does not have internal options for varying the focus distance.
- An additional linear guide in the vertical direction extends the marking area up and down.
- the receptacle has a longitudinal support with a receptacle bed for receiving the support rail, which is held eccentrically to an axis of rotation by pivot arms.
- the receiving bed is preferably arranged about 20 to 30 mm off-center from the center of the axis of rotation.
- the eccentric pivoting movement of the receptacle and thus of the mounting rail is based on the knowledge that, on average, the center of gravity of the electrical devices to be labeled, especially in the case of terminal blocks, about the mentioned 20 to 30 mm above the mounting rail mount of the electrical devices rule. Due to the fact that the receiving bed is spaced from the axis of rotation by the abovementioned distance, the electrical devices are rotated on average in their own center of gravity, which enables a fast and inertia-free rotary movement. This minimizes the forces that occur when the rotary motion is accelerated. In this way, the highest possible rotational acceleration and thus swiftly executing swivel movement is achieved, which shortens the marking process overall.
- the receptacle is also advantageously mounted in such a way that it can be pivoted through an angle of rotation greater than 360 ° without a stop.
- the angle of rotation is preferably also significantly greater than 360 ° and is, for example, 720 °. It can also be provided that any desired angles of rotation are possible without a stop.
- the rotary feedthrough is designed so that a power supply for the electromagnets can be provided for the entire range of rotation. The free pivoting achieved in this way makes it possible to pivot the mounting rail in any direction, and thus to switch to further labeling positions in any situation on the shortest possible rotation. This makes it possible to switch to the next labeling position in any case with a rotary movement of less than 180 °.
- the laser head has a laser which emits in an ultraviolet (UV) wavelength range.
- UV wavelength range has the advantage that markings can be applied to almost any plastic surface.
- the electrical devices to be marked can have fields provided for marking, but these do not have to be provided with a special coating or a special plastic, as is usually necessary for markings with infrared (IR) light. It is also possible to apply markings to areas of the electrical devices that are not specifically designated.
- the markings applied can not only be pure color changes, but, when using suitable parameters and focusing the laser radiation, are accompanied by a material removal or a material modification that makes the markings palpable (tactile marking).
- the device has an image capturing device for imaging a support rail inserted into the receptacle.
- the image acquisition device is preferably directly or indirectly connected to the arranged displaceable slide of the linear guide and is particularly preferably a line camera.
- the image acquisition device makes it possible to adapt given positions of the markings to be applied to actual circumstances if there are deviations due to tolerance or gap.
- Fig. 1 -4 an example of a device for marking electrical
- FIG. 5a-c different views of a pivoting device in the
- Fig. 1 -4 shown marking device
- Fig. 6 is a cross-sectional view of a side member of
- FIG. 7a, b show an arrangement of electrical devices on a mounting rail, each in an isometric view from different directions of view;
- FIG. 8 shows a flow diagram of a method part for determining
- FIGS. 1-4 an example of a device for marking electrical devices that can be lined up in a row, hereinafter referred to as marking device for short, is shown in an isometric view.
- marking device for short
- a registration method according to the marking method that can be carried out with this device is described in connection with FIGS. 7a to 9.
- the marking device is shown in each case with an accommodated support rail 1 onto which a number of electrical devices 2 are locked. All of the latched devices 2 shown in the figures of this application are terminal blocks. It goes without saying, however, that other latched electrical or electronic devices such as fuses or load switches, for example, can be lined up on the support rail 1 and marked by the device shown.
- the electrical devices 2 are also referred to below as terminal blocks 2.
- FIG. 1, 2 and 4 show the marking device with differently equipped mounting rails 1.
- the viewing direction in which the device is shown is the same in the three cases mentioned.
- FIG. 3 shows the marking device with the mounting rail 1 and the terminal blocks 2 according to FIG. 2 from a different viewing direction.
- the marking device To receive and also to carry out a pivoting movement of the support rail 1 with the terminal blocks 2, the marking device has a
- Swivel device 10 on.
- the actual marking (labeling) on the terminal blocks 2 is carried out by a laser arrangement 20.
- the marking device including the laser arrangement 20 is controlled by a control device not shown here. In the following, first the pivoting device 10, then the laser arrangement 20, is described in more detail.
- the pivoting device 10 has a frame 11 in which a type of egg ner swing receptacle 12 is arranged rotatably about its longitudinal axis.
- the receptacle 12 comprises a longitudinal beam 13 which is arranged eccentrically at both ends via pivot arms 14 compared to an axis of rotation. This axis of rotation is rotatably supported in the bearings in the end parts of the frame 11 and coupled to a drive 16 to correspond.
- the drive 16 is, for example, an actuator with a position encoder.
- an optionally reduced-speed DC motor is particularly suitable for the actuator.
- FIGS. 5a-5c show the pivoting device 10 in different Represent views separately from the laser assembly 20 and without a mounting rail 1 attached.
- Fig. 5a shows the pivoting device 10 in an isometric view
- Fig. 5b in a side view
- Fig.5c in a plan view.
- a fixed receiving tab 132 is arranged, under which an end portion of the support rail 1 is pushed in order to fix the support rail on the receiving bed 131 on this side.
- the opposite end of the support rail 1 is fixed with a comparable on receiving tab 152, which is not fixed, but is arranged on a slidable tab 15 ver.
- the rider 15 is guided longitudinally on the longitudinal beam 13, for which purpose, in this embodiment example, guide rails 135 are provided on the side of the longitudinal beam 13.
- the rider 15 is equipped with a quick release lever 151, which allows a locking of the rider 15 on the longitudinal beam 13 to be fixed or released. After releasing the tab 15, it can be moved in the direction of the attached mounting rail 1 until the mounting bracket 152 attached to the tab 15 (see FIGS. 5b, c) fixes the mounting rail 1 in the mounting bed 131.
- side guide plates 133 are provided in the longitudinal direction of the longitudinal beam 13 on the side edges of the receiving bed 131, which laterally guide the support rail 1 along its entire length.
- Fig. 6 a cross section through the longitudinal member 13 with a mounting rail 1 is shown.
- the side guide plates 133 grip around the support rail 1 laterally in a lower area.
- the side guide plates 133 are preferably designed as spring steel plates, so that they can compensate for tolerances in the width of the support rail 1.
- the side guide plates 133 are preferably made so thin and protrude only so far over the receiving bed 131 that they guide and position the support rail 1, but do not collide with latched-on electrical devices 2. This is possible because the mounting rail mounts on the electrical devices 2 usually have a small lateral free space at least in the lower region of the mounting rail.
- the side guide plates 133 are particularly helpful for longer support rails 1, since production and / or transport-related longer support rails 1 tend to bend.
- a plurality of electromagnets 134 are arranged at a distance from one another in the longitudinal direction of the support rail 13 in the receiving bed 131. After the mounting rail 1 has been placed on, the electromagnets 134 are energized individually, in groups or together, so that they fix the mounting rail 134 firmly and without a gap in the receiving bed 131 due to bending.
- a power supply for the electromagnet 134 takes place via a rotary feedthrough 17, which is preferably arranged on the side of the pivoting device 10 opposite the drive 16.
- FIG. 4 shows an example with a shorter support rail 1 used. In this case too, it can be provided that all electromagnets 134 are supplied with current. Alternatively, it can be provided to energize only a number of electromagnets 134 which are in the area of the actually used mounting rail 1.
- a channel running in the longitudinal direction of the longitudinal member 13 is formed in the longitudinal member 13, through which the cables for energizing the electromagnets 134 can run.
- the channel 136 also serves to reduce weight in order to minimize the rotational inertia of the receptacle 12 in order to achieve a high rate of rotation with the lowest possible torque.
- the receiving bed 131 for the support rail 1 is arranged eccentrically from the axis of rotation during the rotary movement.
- the distance by which the receiving bed 131 is spaced apart from the axis of rotation is preferably in the range from 20 to 30 millimeters (mm) and particularly preferably about 23 mm.
- the reason is that, on average, the center of gravity of the electrical devices 2 to be labeled - in particular in the case of terminal blocks - is approximately 23 mm above the mounting rail mount of the electrical devices 2. If the receiving bed 131 is spaced apart from the axis of rotation by the distance mentioned, the electrical devices 2 are rotated on average in their own center of gravity, which enables a quick and as inertial rotation as possible. This minimizes the forces that occur when the rotary motion is accelerated. That way becomes a Highest possible rotational acceleration and therefore quick to execute
- the drive 16 and the rotary feedthrough 17 are preferably designed in such a way that an unlimited angle of rotation when the receptacle 12 is rotated is possible, please include. In this way, the rotating or pivoting movement of the receptacle 12 can take place at any time in any direction, unaffected by any other restrictions. The resulting advantages for the marking process will be explained in more detail later.
- the laser arrangement 20 is arranged laterally next to the pivoting device 10 in the region of the receptacle 12.
- the actual marking on the electrical devices 2, i.e. on the terminal blocks 2 in the example shown, is carried out by a laser head 21, which carries all the components necessary to apply the label, in particular a laser and deflection and possibly focusing units to the laser beam to be able to deflect the application of the marking, includes.
- Various techniques can be used to mark the electrical devices 2 with a laser.
- an infrared laser as the laser of the laser head 21, e.g. a CO2 laser that emits light at a wavelength of around 10.6 micrometers (pm).
- an infrared laser it is customary for marking fields sensitive to infrared radiation to be provided on the electrical devices 2 which change color when infrared laser radiation hits, so that a marking can be applied.
- the marking fields can be in the form of stickers, applied coatings and / or by using a corresponding infrared-sensitive plastic in the electrical devices.
- a laser head 21 with a laser emitting in the ultraviolet wavelength range of approximately 190 to 380 nanometers (nm), in particular at 355 nm.
- a laser can be, for example, a Nd: YAG laser or also a CO2 laser with a subsequent frequency tripling.
- Light in the UV wavelength range has the advantage that markings can be applied to almost any plastic surface.
- the electrical devices can still have fields provided for marking, but these do not have to be provided with a special coating or a special plastic. It is also possible, including in areas of the electrical devices that are not specially designated To apply markings. Through suitable parameters and focusing of the laser radiation, not only pure color changes can be used for marking, but material removal or material modification of the marked material can be achieved, which makes the markings palpable (tactile marking).
- the laser head 21 is controlled by the control device, not shown here, in order to apply a label within a focal field 4.
- the Fo kusfeld 4 is shown in Figs. 1-4.
- the exact size and the distance at which the focus field 4 is located in front of the laser head 21 are dependent on the imaging properties of the laser head 21.
- the laser head 21 can apply markings, in particular characters, numbers and / or symbols, to areas to be marked.
- a laser beam generated in the laser head 21 is deflected via a plurality of rotatable or pivotable mirrors in order to reach every point in the focus field 4. Since the mirrors have a low mass inertia, the movement of the mirror and thus the deflection of the laser beam is a faster process compared to other mechanical movements in the system.
- the focus field 4 is smaller than the maximum length of the mounting rail 1 with the electrical devices 2 to be labeled.
- the laser arrangement 20 has a linear guide 22 in the longitudinal direction of the longitudinal member 13. This direction is also referred to below as the z direction.
- the linear guide 22 extends over the substantially entire length of the receptacle 12 of the pivoting device 10.
- the linear guide 22 can e.g. be in the form of a spindle or rack and pinion drive forms. However, other drives are also possible. For the sake of clarity, drive motors of the linear guide 22 are not explicitly shown in the figures.
- the laser head 21 is fastened to a movable slide of the linear guide 22 by means of a flange, which enables the position of the laser head 21 to be adjusted also in the x and y directions perpendicular to the z direction.
- a linear guide 23 is provided in the x direction and a linear guide 24 in the y direction.
- the x-direction runs horizontally and the y-direction runs vertically.
- the linear guide 23 can optionally be dispensed with and it can be designed as a holder with a fixed distance. If the variety of models of the electrical devices 2 to be labeled does not provide for large differences in height between the devices, it may be possible to dispense with a linear guide in the y-direction and the corresponding linear guide 24 can be designed as a fixed holder. The height difference relates to a variation in the distance between the areas to be marked and the mounting rail.
- the laser assembly may optionally include image capture means, e.g. a camera, especially a line camera.
- image capture means e.g. a camera, especially a line camera.
- This can be arranged independently of the laser head 21 in such a way that it is aligned with the pivoting device 10 and thus with an inserted support rail 1.
- the image capturing device is arranged in such a way that it can be moved by the linear guide 22 in the x direction along the mounting rail receptacle.
- the image capturing device can also be arranged on the laser head 21 or be formed integrally therein. In that case, it can be moved not only in the x-direction, but also in the z-direction and possibly the y-direction.
- a combination of a line camera, the recorded image line of which is aligned transversely, in particular perpendicular to the x-direction, and being able to move in the x-direction makes it possible to image mounting rails 1 of any length in an image with a variable number of pixels in the x-direction.
- the image capture device can be used at various stages of the marking process.
- the image capture device can be used to map a mounting rail 1 after insertion, possibly in different pivoting positions to check whether the mounting rail 1 used and to be labeled is configured correctly, e.g. whether it actually has the electrical to be labeled Device 2 in the correct orientation and order. It can also be checked whether the devices 2 are correctly positioned to the effect that the marking areas to which the markings are to be applied are located at the position that is stored for the respective marking. If there are deviations that are within a specifiable tolerance range, an indication matching of the positions at which the markings are subsequently applied can be adapted to the positions of the marking areas found. This procedure is explained in more detail below.
- the image acquisition device can be used to monitor the actual marking process.
- An applied mark can be checked for correctness and / or legibility.
- a renewed image of the mounting rail 1 and the electrical devices 2 can be recorded after the markings have been applied.
- each individual marking can be checked immediately after or even during its application.
- the laser head 21 is moved with the aid of the linear guide 22 such that at least some of the markings to be applied are in the area of the focus field 4.
- marking planes 3 are drawn, indicating the planes in which markings on the various rows of terminals 2 are to be attached.
- a plurality of equal terminal blocks 2 is arranged on the mounting rail 1, with areas to be marked on different sides of the terminal blocks 2 at differently high (opposite the mounting rail 1) arranged contacts are arranged. All markings that can be applied to one or more of the terminal blocks 2 without either the receptacle 12 having to be pivoted or the laser head 21 having to be moved are recorded in a marking plane 3.
- the support rail 1 with latched electrical devices 2 which can also be seen in FIG. 5, is provided separately from the marking device in order to better illustrate the various marking levels 3.
- 7a and 7b show the support rail 1 from different directions of view in isometric representations.
- markings 5 already applied to the electrical devices 2, that is to say the terminal blocks 2 are shown as examples.
- the markings 5 are for the most part connection markings that are attached to the fields next to connections. More of the Markings 5 relate, for example, to customer-specific identification or order numbers or module designations or the like.
- the various marking planes 3 are successively brought into the plane of the focus field 4, which is achieved by pivoting the receptacle 12 and possibly by actuating the linear guide 22 in the z direction and / or the linear guide 23 in the x direction and / or the linear guide 24 takes place in the z direction. All of the markings located in the marking plane 3, which is then located in the focus field 4, are applied by the laser head 21 before the next one of the marking planes 3 is brought into the focus field 4.
- FIG. 3 shows, due to the arbitrary pivotability of the recording 12, markings on the underside of the terminal blocks 2 are attached.
- the free pivotability also makes it possible to switch to the other side of the terminal blocks 2 via the underside of the side member 13. For example, if on both sides of the terminal blocks 2 obliquely downwardly inclined labeling fields are provided, a rotation over the bottom, i.e. a rotation in which the top of the terminal block 2 does not pass the laser head 21, but the underside of the longitudinal beam 13, would become one Perform a rotary movement of less than 180 ° instead of having to perform a rotary movement of more than 180 ° over the top.
- the various marking planes 3 are characterized by their position in space and their dimensions. In summary, these properties are referred to as the location coordinates of a marking plane 3. With regard to the location in space, not only the position, but in particular also an inclination of the marking planes 3, is relevant, since markings can only be applied to surfaces that are not distorted and / or blurred with regard to the Distance to the laser head 21 but also in the Hin view of the inclination are in the focus field 4.
- the control device which controls both the laser head 21 and the linear guides 22-24 and also the drive 16 of the pivoting receptacle 12, receives information about the configuration of the mounting rail 1, ie transmitted via the latched electrical device 2, as well as information on which device at which position with what inclination wel che mark 5 is to be applied.
- This information is in the framework this application collectively referred to as marking instructions.
- a marking plane 3 thus contains at least one, preferably a plurality of markings 5, all of which are located in this marking plane 3 and which, in addition, do not differ with regard to the marking parameters to be used. Marking parameters relate to the setting of the laser of the laser head 21, which must be set to apply the marking.
- a marking parameter is e.g. the power of the laser and the marking speed, which together influence the energy input per surface of the marking. These marking parameters are essentially dependent on the material to which the marking 5 is applied. Information about the material to be marked is also available with the data record that describes the mounting rail 1 and the electrical devices 2. They can be integrated directly into the marking instructions or also be accessible via linked product information.
- FIG. 8 An exemplary embodiment of a method for establishing the various marking planes 3 is shown in FIG. 8 in the form of a flow chart.
- a first (or, in subsequent repetitions of step 1, a next) marking instruction is initially retrieved from the transmitted information about the markings 5 to be applied.
- a next step S2 it is determined whether the marking 5 specified by this marking instruction is to be applied to the same electrical device 2 with the same marking parameters as the one last viewed. If this is not the case - e.g.
- the method branches to a next step S3, in which it is checked whether the alignment of the area to be marked is the same as in the case of markings 5 previously made. If this is not the case, the method branches to a next step S4, in which a new marking plane 3 is generated.
- a next step S9 it is then checked whether further marking instructions that are not yet assigned to a marking level 3 are present If there are no further marking instructions that have not yet been assigned, this process section is completed. If there are further marking instructions that are not yet assigned to any marking level 3, the method branches back to step S1, in which the next marking instruction is called up.
- step S2 If it is determined in step S2 that the currently viewed marking instruction relates to the same electrical device as the one previously edited and the same marking parameters are used, the required marking levels are usually already created and a new marking level does not necessarily have to be opened . In this case, the method is continued in a step S5. Step S5 is also reached when it is established in step S3 that the current marking instruction relates to a different electrical device 2 than the one previously considered, but that marking 5 is to be applied to a surface with the same orientation.
- step S5 it is queried whether the marking 5 should be made on the same material to be marked or at least on a material that requires the same setting of the laser of the laser head 21. If this is not the case, i.e. if changed marking parameters are to be used, the method branches to step S4, in which a new marking level 3 is generated.
- step S6 it is checked whether the current marking lies within the focus area of one of the marking planes 3 that have already been created.
- the background is that the focal plane 4 of the laser head 21 allows a - albeit small - depth of focus up to typically a few millimeters at a distance. Markings which, with the same alignment of the area to be marked and the same required laser parameters, differ by only a few millimeters with regard to the distance between the laser head 21 and the surface (or a difference in distance in the range of the depth of field) can therefore be in the same marking plane 3 are summarized.
- step S4 in order to generate a new marking plane.
- step S7 in which it is checked whether the marking 5 to be applied is possibly shaded.
- a shading situation can exist, for example, if, from the point of view of the laser head 21, the marking 5 lies behind a protruding part of an adjacent electrical device 2, so that the laser beams cannot even reach the marking area from the present position of the laser head. If such a shading situation exists for the currently considered marking instruction, the method branches to step S4 in order to assign the marking instruction to a new marking level.
- step S8 the current marking instruction is added to this already existing marking level 3.
- step S9 the method is also continued from step S8 with step S9 in order to consider further marking instructions if necessary.
- the various marking planes 3 are then successively brought into the plane of the focus field 4, which ar Entry by pivoting the receptacle 12 and possibly by actuating the linear guide 22 in the z-direction and / or the line 23 takes place in the x direction and / or the linear guide 24 in the z direction. All in the marking plane 3, which is then located in the focus field 4, the markings are applied by the laser head 21 before the next one of the marking planes is brought into the focus field 4.
- These movements are assigned different priorities, with the evaluation depending on the time involved in carrying out the movement. Since, particularly in the construction of the marking device, as described in connection with FIGS. 1-6, pivoting of the mounting rail 1 can take place significantly faster than moving the laser head along the mounting rail 1, the criterion “no driving of the laser head 21 in the z-direction ”has a higher priority than the criterion“ no rotation of the receptacle 12 ”.
- a priority can also be assigned to the other two degrees of freedom of movement of the laser head 21, that is to say the movement in the x or y direction.
- the feed speeds of the linear guides 23, 24 for the x and y directions are usually comparable to those of the linear guide 22 for the z direction, the distances to be covered are usually smaller for these two axes of movement. Therefore the premise “no movement in the z-direction” has higher priority than the premise “no movement in the y-direction” and “no movement in the x-direction”.
- the priorities given to the movement of the x and y directions are comparable to those of the pivoting movement and can be sorted in a priority order before or after this.
- Movements of the laser head in the x direction are often only very small. Movements in the y-direction can be larger, but occur less frequently, since a movement in the y-direction from a normal position is only required for very large devices to be labeled. A priority order of “Pivoting before movement in the x direction before movement in the y direction before movement in the z direction” is therefore preferred.
- FIG. 9 shows in a flowchart how the priorities can be assigned in an exemplary embodiment with this preferred order of priorities in order to select a next marking level for processing by the marking device.
- the method iterates through the set of marking levels that have not yet been processed in order to give them a priority value p.
- the marking level which has the smallest or one of the smallest priority values p after the method shown in FIG. 9 has been completed is processed as the next marking level by the marking device.
- a next step S12 it is considered whether processing this currently viewed marking plane would result in pivoting of the mounting rail mount. If so, the priority value p is increased in a step S13 by a value of a priority code that is assigned to this movement. Otherwise the priority value p is retained.
- the priority code for pivoting the mounting rail mount is selected equal to 1 in this example.
- a next step S16 it is determined whether processing this currently considered marking plane would result in a movement in the y direction. If so, the priority value p is increased in a step S17 by the value 4 of a priority code assigned to this movement, otherwise it retains its value.
- a next step S18 it is determined whether processing this currently considered marking plane would result in a movement in the z direction. If so, the priority value p is increased in a step S19 by the value 8 of a priority code assigned to this movement, otherwise it retains its value.
- step S20 checks whether there are still further marking planes to be processed, to which no priority value p has yet been assigned. If so, the method branches back to step S1 1 in order to assign a priority value p to the next marking level still to be processed.
- the method branches to a step S21 in which the marking level 3 with the lowest priority value p is selected. If there are several marking planes 3 with the lowest priority value p, any one of these marking planes 3 is selected. The marking process is then continued with this marking level 3.
- the part of the marking process shown in Fig. 9 is carried out again in order to again record the priorities for all further marking levels 3 based on the then current position of the laser head 21 or the rotational position of the receptacle 12 .
- the process ends when all marking levels 3 have been processed.
- the various movements are characterized by priority indicators that represent powers of two. Such a binary evaluation scheme is advantageous, but other priority indicators can also be assigned.
- the priority codes are selected in such a way that marking levels are selected when they have a priority value p that is as small as possible. It goes without saying that the method can also be designed in such a way that the highest possible priority value p leads to a selection.
- the prioritization can also take into account how far the travel distances are in order to set a next marking level.
- an image capturing device which records an image of relevant sections of the mounting rail 1 and the devices 2 to be marked. Marking positions can be corrected using the images.
- the image acquisition device is a line camera which is integrated in the laser head 21 or arranged on it. With the aid of the linear guide 22, the line camera can be moved along the mounting rail 1 in order to image it.
- the use of a line camera is advantageous in that the mounting rail 1 with the electrical devices 2 can be imaged in this X-direction within any lengthwise section with a correspondingly adapted number of pixels.
- a coherent section in the x direction is preferably determined in such a way that all markings to be applied are correct pivot position are in this one contiguous section.
- Similar images are recorded for further pivot positions of the pivoting device 10 until the mounting rail 1 and the electrical devices 2 are recorded in all areas in which markings are to be applied.
- the areas in the longitudinal direction are advantageously selected to be a few percent larger on both sides than is necessary according to the marking instructions, for example, in order to ensure that all areas on which markings are to be applied are covered by the image.
- mapping and the evaluation of the images described below preferably take place before the method described in connection with FIG.
- marking fields special areas are provided on the electrical devices 2 for the markings, which are referred to below as marking fields.
- these marking fields can be provided with a coating that differs in color from the base material of the housing of the electrical device 2.
- marking fields can be provided with a coating that differs in color from the base material of the housing of the electrical device 2.
- marking fields can be provided with separate “markers” are used for marking. These are small plastic plates that can optionally be pre-labeled or unlabeled for the process described here. The markers are clipped onto the electrical devices at the appropriate point. These markers can also be in the form of so-called marking strips which extend over two or more adjacent marking fields. In the context of this application, a “marking field” is to be understood as any area on which a marking is to be applied.
- the marking fields usually have a difference in color or brightness compared to the base material of a housing of the electrical devices 2.
- This difference in color or brightness is used to find the marking fields in the recorded images.
- evaluation algorithms known per se for edge detection can be used for this purpose.
- the image capture device for example the line camera, or to operate it in such a way that it uses a wavelength range in which contrasts between the marking field and the base material of the housing are particularly noticeable.
- the center coordinates of the identified marking fields are determined and these are compared with coordinates in accordance with the marking instructions. The comparison is used to assign the actual coordinates to the expected coordinates.
- criteria are preferably established which relate to the limits of this assignment. For example, maximum permissible displacements can be defined that are, for example, in the range of a few millimeters. If then, for example, the total number of marking fields found is smaller than the number of marking instructions or if an assignment of the marking fields found to the marking instructions would require shifts that are above the maximum permissible shift, provision can be made for the method to be stopped first. A manual check can be suggested as to whether the installed mounting rail 1 with the electrical devices 2 actually corresponds to that provided in accordance with the marking instructions.
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- Optics & Photonics (AREA)
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- Burglar Alarm Systems (AREA)
Abstract
Description
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Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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DE102019108298.6A DE102019108298A1 (de) | 2019-03-29 | 2019-03-29 | Verfahren und Vorrichtung zum Markieren von aneinanderreihbaren elektrischen Geräten |
DE102019131750 | 2019-11-25 | ||
PCT/EP2020/055918 WO2020200639A1 (de) | 2019-03-29 | 2020-03-05 | Verfahren und vorrichtung zum markieren von aneinanderreihbaren elektrischen geräten |
Publications (2)
Publication Number | Publication Date |
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EP3946962A1 true EP3946962A1 (de) | 2022-02-09 |
EP3946962B1 EP3946962B1 (de) | 2023-05-03 |
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EP20712222.7A Active EP3946962B1 (de) | 2019-03-29 | 2020-03-05 | Verfahren und vorrichtung zum markieren von aneinanderreihbaren elektrischen geräten |
Country Status (3)
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EP (1) | EP3946962B1 (de) |
ES (1) | ES2949936T3 (de) |
WO (1) | WO2020200639A1 (de) |
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DE102009017999B4 (de) | 2008-11-18 | 2024-08-14 | Weidmüller Interface GmbH & Co. KG | Verfahren zur automatisierten Montage von anreihbaren Geräten auf einer Montagebasis und Montageanordnung |
DE102009017266A1 (de) | 2009-01-30 | 2010-08-05 | Weidmüller Interface GmbH & Co. KG | Verfahren und Vorrichtung zum Markieren von Reihenklemmen |
CH700111B1 (fr) | 2009-09-25 | 2010-06-30 | Agie Sa | Machine d'usinage par laser. |
CN202192857U (zh) * | 2011-08-31 | 2012-04-18 | 重庆旭安科技有限责任公司 | 线缆激光打标机 |
JP6723367B2 (ja) | 2016-01-18 | 2020-07-15 | フェニックス コンタクト ゲーエムベーハー ウント コムパニー カーゲー | 電気的コンポーネントをマーキングするための方法 |
DE102016100722B4 (de) * | 2016-01-18 | 2022-03-03 | Phoenix Contact Gmbh & Co. Kg | Verfahren zum Bestücken einer Tragschiene mit elektrischen Geräten |
-
2020
- 2020-03-05 WO PCT/EP2020/055918 patent/WO2020200639A1/de unknown
- 2020-03-05 EP EP20712222.7A patent/EP3946962B1/de active Active
- 2020-03-05 ES ES20712222T patent/ES2949936T3/es active Active
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EP3946962B1 (de) | 2023-05-03 |
ES2949936T3 (es) | 2023-10-04 |
WO2020200639A1 (de) | 2020-10-08 |
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