EP4103901A1 - Verfahren und vorrichtung zum temperieren von werkstücken, insbesondere von fahrzeugkarosserien - Google Patents
Verfahren und vorrichtung zum temperieren von werkstücken, insbesondere von fahrzeugkarosserienInfo
- Publication number
- EP4103901A1 EP4103901A1 EP21703429.7A EP21703429A EP4103901A1 EP 4103901 A1 EP4103901 A1 EP 4103901A1 EP 21703429 A EP21703429 A EP 21703429A EP 4103901 A1 EP4103901 A1 EP 4103901A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sensor
- temperature
- workpiece
- sub
- derived
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/12—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/001—Handling, e.g. loading or unloading arrangements
- F26B25/003—Handling, e.g. loading or unloading arrangements for articles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
- F26B3/04—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour circulating over or surrounding the materials or objects to be dried
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B2210/00—Drying processes and machines for solid objects characterised by the specific requirements of the drying goods
- F26B2210/12—Vehicle bodies, e.g. after being painted
Definitions
- the invention relates to a method for tempering workpieces, in particular vehicle bodies, in which a) the workpieces are tempered in a tempering tunnel and are conveyed with a trans port system; b) an actual temperature Ti st of the workpiece is detected within a reference range of the workpiece by means of a contactless temperature sensor system with a sensor device.
- the invention also relates to a device for temperature control of workpieces, in particular vehicle bodies, with a) a housing in which a temperature control tunnel is accommodated, the workpieces in the temperature control tunnel being temperature controlled by means of a temperature control system and conveyed continuously or intermittently by means of a transport system; b) a contactless temperature sensor system with a sensor device, with means of which an actual temperature Ti st of the workpiece can be detected within a reference area of the workpiece.
- the invention also relates to a system for treating, in particular for coating, in particular for painting, workpieces, in particular vehicle bodies.
- tempering a vehicle body is spoken of in the present case, this means bringing about a certain temperature of the vehicle body which it initially does not yet have. It can be an increase or decrease in temperature.
- Tempered air is understood to be one which has the temperature required to regulate the temperature of the vehicle body. The same applies in general to workpieces of all kinds, in particular in the automotive industry for vehicle wheels or vehicle rims, bumpers, exterior mirror housings or other add-on parts of vehicle bodies. But workpieces from other industrial sectors are also subjected to tempering during their manufacture.
- a common case of temperature control, namely heating, of vehicle bodies in the automotive industry is the process of drying the coating of a vehicle body, be it a paint or an adhesive or the like, but also the drying of a damp or wet surface of the workpiece.
- the following description of the invention in detail is based on the case of such a dryer.
- drying refers in particular to processes in which the coating of the vehicle body, in particular a paint, can be made to harden, either by driving out solvents or by Cross-linking of the coating substance.
- the B-pillar or areas on the roof rails are further examples of areas of a vehicle body that specify different heat capacities and make different demands on a drying process. If now in the temperature control device as a whole, the vehicle body is tempered as a whole over a certain period of time, so different areas or parts of the vehicle body can consequently reach different temperatures until the Ver dwell time was sufficiently long that all areas and parts are brought to the same temperature; this applies to both heating and cooling processes.
- the dwell time is increased to drying vehicle body in the temperature control device usually adapted to the longest time that the most unfavorable, most heavily loaded area of the vehicle body needs to heat or cool.
- this object is achieved in that c) the sensor device provides a sensor field with a primary sensor part from which a temperature TP at the primary sensor part can be or is derived; d) the sensor field of the sensor device is also provided with a sub-sensor location from which a temperature Ts at the sub-sensor location and / or an image Ps at the sub-sensor location is derived; e) the temperature TP at the primary sensor parts is then registered as the actual temperature Ti st of the reference range of the workpiece when ea) both TP and Ts exceed or fall below a threshold temperature T t h r; and or eb) the difference ATPS between the temperature TP at the primary sensor parts and the temperature Ts at the sub-sensor point falls below or exceeds a predetermined threshold value T ⁇ max and at least one of the two temperatures TP or Ts falls below a threshold temperature T t h r ; and / or ec) the change ATs in the temperature Ts
- the sensor field of the sensor device can be formed with the aid of a single sensor unit or with the aid of several sensor units.
- a thermal imaging camera or a point-shaped scanning pyrometer or a linear scanning pyrometer is preferably used as the respective sensor unit.
- a thermal imaging camera is particularly preferred.
- the method is advantageously carried out in a system for treating the workpieces, in particular special for coating, preferably for painting, the workpieces.
- a coating process always includes a tempering process in the form of a drying, in which the coating is dried in the sense explained above.
- the sensor device provides a sensor field with a primary sensor part, from which a temperature TP at the primary sensor part can be derived; d) the sensor device also provides the sensor field with a sub-sensor location, from which a temperature Ts at the sub-sensor location and / or an image Ps at the sub-sensor location can be derived; e) a control device is present which is set up in such a way that the temperature TP at the primary sensor parts is then registered as the actual temperature Ti st of the reference area of the workpiece when ea) both TP and Ts have a threshold temperature T t h exceed or fall below r; and or eb) the difference AT PS between the temperature T P at the primary sensor parts (74) and the temperature Ts at the sub-sensor point (76) falls below or exceeds a predetermined threshold value T ⁇ max and at least one of the two temperatures T P or Ts one Falls below threshold temperature T
- the arrangement of the primary sensor parts and the sub-sensor point in the sensor field is advantageously determined as a function of the nature and / or geometry of the workpiece.
- the sensor device preferably comprises one or more sensor units which form the sensor field. It is favorable if a respective sensor unit is a thermal imaging camera or a point-like scanning pyrometer or a linear scanning pyrometer. A thermal imaging camera is also preferred here.
- the above-mentioned object is achieved in that it comprises a temperature control device with some or all of the features explained above.
- FIG. 1 a cross section of a drying booth of a dryer for drying workpieces, which comprises a contactless temperature sensor system with a plurality of sensor devices;
- FIG. 2 shows a detail of a longitudinal section of the dryer from FIG. 1 along the angled section line II-II there;
- FIG. 3 shows a detail of a horizontal section of the dryer from FIG. 1 along the section line III-III there, only lateral sensor units being shown;
- FIG. 4 shows different phases A, B, C and D in the detection of the temperature of the workpiece according to a first detection concept
- FIG. 5 shows different phases A, B, C and D in the detection of the temperature of the workpiece according to a second detection concept
- FIG. 6 perspective views of variants A, B and C of a section of a modified dryer in which workpieces are arranged transversely to the conveying direction.
- FIG. 1 shows a cross section of a temperature control device 10 in the form of a dryer 12.
- the temperature control device 10 has a temperature control cabin 14 which defines a drying cabin for the dryer 12.
- the temperature control device 10 belongs to a system, designated as a whole by 16, for treating workpieces 18, in particular for coating workpieces 18.
- vehicle bodies 20 can be seen in the figures.
- the workpieces 18 can, however, also be other workpieces and in particular add-on or mounting parts of vehicle bodies 18 such as bumpers, side mirrors or the like.
- the drying booth 14 comprises a booth housing 22 which delimits a temperature control tunnel 24 which, in the case of the dryer 12, is a drying tunnel and comprises side walls 26, a ceiling 28 and a tunnel floor 30.
- the dryer 12 also comprises a transport system 32, indicated only schematically, by means of which the workpieces 18 are transported through the temperature control cabin 14 and which for this purpose has a large number of transport trolleys 34 on which the workpieces 18 are transported.
- the direction of conveyance is illustrated in FIGS. 2 to 6 by arrows that are not designated separately.
- the transport system 32 can be a rail-bound transport system in which the transport carriages 34 are moved on a rail system.
- a rail system includes, for example, a support rail on which the transport vehicles 34 travel and which is anchored to the ground.
- a floor-bound mounting rail can be single-track or two-track or multi-track.
- the transport system 32 can also be designed as a so-called “driverless transport system” (AGV) and the transport trolleys 34 each free-moving as a so-called “driverless transport vehicle” (AGV), which run with a chassis on a traveling floor and can be driven and steered independently of one another are.
- a transport carriage 34 comprises a fastening device 36 to which a workpiece 18 or a corresponding workpiece carrier for workpieces 18 can be fastened.
- the workpiece 18 is picked up directly by the transport carriage 34 without an additional workpiece carrier.
- the transport carriages 34 can also be designed in such a way that they receive a workpiece carrier to which the workpiece 18 is attached.
- skids are used as such workpiece carriers, as is known per se.
- Each trolley 34 has its own drive system 38 with it, so that the trolleys 34 can be driven and moved independently of one another.
- its own drive system 38 is formed by drive rollers that are not specifically identified and run on the floor, by an associated drive motor and by a control system not specifically shown for this purpose.
- each transport vehicle 34 can take place in a manner known per se by means of accumulators that are carried along. In the case of a rail-bound transport system 32, corresponding drive rollers of the drive system 38 run on the rail system. The energy supply of each transport carriage 34 can also take place there by conductor lines on the rail system, as is known per se.
- Various possible transport concepts are only mentioned here as examples. Notwithstanding this, other transport systems known per se can be used. In addition to other variants of ground-based transport systems, these also include overhead conveyor systems.
- transport trolleys 34 each with its own drive system 36
- other transport trolleys may also be present which are driven by a central drive system.
- a central drive system can be formed by a chain hoist or the like.
- the transport carriages 34 explained here can accordingly also be driven and moved independently of other drive devices.
- the temperature control cabin 14 comprises an intermediate floor, so that the cabin interior is divided into a temperature control room and a driving area running underneath.
- the trolleys 34 are then moved in the driving area, the intermediate floor having a passage which extends in the longitudinal direction of the drying cubicle 14 and through which a connection structure can extend, which is a chassis of the trolley 34 located in the driving area with its fastening device 36 couples in the temperature control room.
- the drying booth 14 in any case includes a temperature control system 40, by means of which a workpiece 18 can be temperature controlled.
- the temperature control cabin 12 comprises air spaces 42 which are accommodated on both sides in the longitudinal direction next to the temperature control tunnel 24 in the cabin housing 22.
- the air spaces 50 and the temperature control tunnel 24 are separated by vertical partitions 44, in which corresponding air passages 46 are present, which are provided with flow nozzles 48.
- the flow nozzles 48 can be movable and adjustable and in the present exemplary embodiment comprise nozzles 54 which are designed as short jet nozzles or wide jet nozzles.
- the short jet nozzles are nozzles with such a short delivery width that they can act on the side of the vehicle body 20 facing them.
- Such short jet nozzles are known per se.
- Her The jet direction is adjustable, including the air passages 46 in which the short jet nozzles 54 are, for example, spherical cap-shaped boundary walls, whereby the complementary short jet nozzles are adjustable in their angular position.
- Wide jet nozzles on the other hand, have a larger delivery width than the short jet nozzles, which makes it possible to direct the hot air exiting the wide jet nozzles through an opening in the facing side surface of the vehicle bodies 20, for example through a window opening or through an open door, to the inner surface of the opposite body side Align, so that the hot air flow traverses the entire interior of the vehicle body 20.
- the direction of this hot air can also be such that it is primarily directed towards the lower, inner area of the vehicle body 20, where there is a relatively large amount of mass and therefore a large heat capacity.
- the temperature control system 48 can also include differently acting temperature control devices, for example convective, inductive, infrared or laser heating devices.
- the temperature control device 10 comprises a contactless temperature sensor system 56, the data of which are recorded and evaluated by a control device 58, which are only shown in FIG is illustrated schematically.
- the temperature sensor system 56 comprises at least one sensor device 60, by means of which an actual temperature Ti st of the workpiece 18 can be detected within a reference area 62 of the workpiece 18.
- four sensor devices 60.1, 60.2, 60.3 and 60.4 are shown by way of example, which each detect the temperature Ti st within a reference area 62.1, 62.2, 62.3 or 62.4 of the vehicle bodies 20 assigned to the respective sensor device 60.1, 60.2, 60.3 and 60.4.
- a suitable reference area for monitoring the temperature of the workpiece 18 to be tempered is, in particular, a heavily or heavily mass-loaded area.
- the sensor device 60.1 for the reference area 62.1 on the sill 64 is arranged outside the temperature control tunnel 24 and, in the case of a dryer 12, at least outside the hot area, so that, in contrast, it has to withstand less high temperatures.
- the sensor device 60.1 is arranged here on the side wall 26 of the cabin housing 22. If a sensor device is sufficiently cooled, it can also be accommodated in the hot area of the temperature control tunnel 24 in the case of a dryer 12, which is illustrated by the sensor device 60.2, which detects the reference area 62.2 on the sill 64 of the vehicle body 20.
- the sensor device 60.2 is arranged on the tunnel floor 30.
- the sensor devices 60.3 and 60.4 are arranged on a side wall 26 or on the ceiling 28 of the temperature control tunnel 24 and, in the case of a dryer 12, accordingly also outside the hot area.
- a sensor path is formed between a sensor device 60 and an intermediate wall 44. formed, which connects the temperature control tunnel 24 with the sensor device 60 in such a way that the sensor field 68 can detect and scan a region of the temperature control tunnel 24.
- This can be provided, for example, by matching sensor windows in the side wall 26 and the intermediate wall 44 or by a through channel between the side wall 26 and the intermediate wall 44, in the simplest case by a pipe.
- a corresponding niche 60 can be dispensed with and the partition 44 can run continuously, which is indicated in FIG. 3 by a dashed section 44a of the partition 44.
- the temperature sensor system 48 and its mode of operation are explained in more detail below with reference to FIGS.
- the sensor device 60 and the reference area 62 are generally addressed again in the following without any specific reference to the sensor device 60.1 and the reference area 62.1.
- the following explanations apply mutatis mutandis to any existing sensor device 60. Accordingly, the reference area of the vehicle body on the sill 64 of the vehicle body 20 is only designated by 62 in FIGS.
- the sensor device 60 provides a sensor field 68 with which the temperature tunnel 24 can be scanned.
- the sensor device 60 and its sensor field 68 are stationary in the present exemplary embodiment, so that the workpieces 18 are guided past the sensor field 68 on their way through the temperature control tunnel 24.
- FIG. 4, to which reference is now made, illustrates this with the aid of four phases A, B, C and D, which are passed through when a vehicle body 20 is moved with the transport system 32 through the temperature control tunnel 24.
- only a relative movement between the workpiece 18 and the sensor field 68 is to be considered, ie with a stationary workpiece 18, for example in a batch temperature control device or in cyclic operation, the sensor field 68 can be guided along the workpiece 18.
- the temperature of the workpiece 18 can be determined at at least one point in the area of the workpiece 18 that is covered by the sensor field 68.
- the temperature is measured by means of infrared radiation detection, as it is known in and of itself.
- the sensor device 60 can comprise a single sensor unit 70 or also a plurality of sensor units 70 which form the sensor field 68.
- the sensor unit 70 is a thermal imaging camera 72, the camera image of which or from a section of the camera image defining the sensor field 68 for the temperature measurement.
- the temperature of the workpiece 18 can be determined within the scope of the resolution of the thermal imaging camera 72 at any point in the area that is covered by the sensor field 68.
- the sensor field 68 defines a primary sensor part 74, from which a temperature T P at the primary sensor part 74 can be derived.
- the primary sensor location 74 is that the sensor position of the sensor array 68, which portion 62 of the workpiece 18 covers the reference, the actual temperature Ti st is to be determined when the sensor array 68 and the workpiece 18 in space relative to each other in a defined Measuring arrangement.
- Phase C in FIG. 4 illustrates the situation in which the vehicle body 20 and the sensor field 68 are positioned in such a measuring arrangement.
- the primary sensor parts 74 are positioned there within the reference area 62 of the vehicle body 20.
- the temperature T P which is then derived from the sensor response at the primary sensor part 74, can then be registered as the actual temperature Ti st of the reference area 62 of the vehicle body 20.
- the arrangement of the primary sensor parts 74 and the sub-sensor location 76 in the sensor field 68 is determined depending on the nature and / or the geometry of the workpiece 18 and matched to the nature and / or the geometry of the workpiece 18, so that those explained below Conditions for a temperature determination can be met.
- the primary sensor part 74 is a defined pixel or a defined contiguous group of pixels of the camera image. If the sensor field 68 is built up by several sensor units 70, one of these several sensor units 70 can define the primary sensor parts 74, for example.
- the sensor field 68 represents one of the primary -Sensor parts 74 ready different sub-sensor point 76, from which a temperature Ts at the sub-sensor point 76 can be derived.
- the sub-sensor location 76 is a defined pixel or a defined contiguous group of pixels of the camera image at a defined distance from the pixel or the pixel group of the primary sensor parts 74 , one of these multiple sensor units 70 can define the sub-sensor location 76 that does not already specify the primary sensor parts 74.
- a sensor location in the present case the sub-sensor location 76m, is provided by a sensor unit 70 in the form of a thermal imaging camera 72, an image Ps at the sub-sensor location 76 can be derived from this sensor location. This is also possible with a camera that is not sensitive to heat.
- the temperature Ts derived from the sub-sensor point 76 is used by the control device 58 of the temperature sensor system 56 as a correlation temperature, from which, in correlation with the temperature T P at the primary sensor parts 74, it can be deduced that the temperature T P at the primary Sensor parts 74 correspond to the actual temperature Ti st within the reference range 62 of the workpiece 18 and can be registered as such.
- each part and each area of the vehicle body 20 should reach a surface temperature of at least 100 ° C.
- the vehicle body 20 is applied from the nozzles 54 with hot air, which has a temperature of about 130.degree.
- the walls and structures of the temperature control cabin 14 around the vehicle body 20, which limit the temperature control tunnel 24, also have a corresponding temperature of about 130 ° C. in such a case. This temperature of the walls and structures which delimit the temperature control tunnel 24 is referred to below as the background temperature.
- the present is a model of it it is assumed that all walls and structures which delimit the temperature control tunnel 24 are approximately the same temperature, here 130 ° C. as an example. In practice, however, depending on the material of the walls and the other structures, there are different background temperatures that can differ by a few ° C. Therefore, it is preferred to use the lowest surface temperature at the
- Walls and structures of the temperature control cabin 14 can be measured during operation, defined as the background temperature.
- the primary sensor parts 74 and the sub-sensor point 76 in the sensor field 68 are defined in such a way that the primary sensor parts 74 reach the workpiece 18 during the relative movement of the workpiece 18 and the sensor field 68 before the sub-sensor point 76 and scans, the starting situation being assumed that the sensor field 68 does not previously cover any area of the workpiece 18.
- the primary sensor parts 74 lead the sub-sensor point 76 in the direction of movement of the sensor field 68, as illustrated in FIG.
- the sub-sensor point 76 can also run ahead or both sensor points 74, 76 can be arranged vertically one above the other.
- FIG. 4 illustrates this approach, where phase D describes a situation chronologically after the point in time at which the temperature sensor system 56 has determined that the primary sensor parts 74 has reached the reference area 62 of the vehicle body 20 and the measured temperature TP at the primary sensor parts 74 is registered as the actual temperature Ti st of the reference area 62.
- the sub-sensor location 76 is defined in the sensor field 68 in such a way that a component, designated 78, of the inner region of the wheel well of the vehicle body 20 is the first region of the workpiece 18 to the sub- Sensor point 76 arrives.
- This inner area or the components present there generally reach a temperature similar to that of the rocker 64.
- a threshold temperature T thr is defined and the control device 58 determines whether TP and Ts are less than T thr . If this is the case, TP is registered as the actual temperature Ti st of the reference area 62 of the vehicle body 20. This threshold temperature T thr lies between the surface temperature which the reference area 62 of the workpiece 18 should at least reach and the background temperature. So that there can be no overlap between the threshold temperature T thr and the lowest background temperature of a wall or a structure, as discussed, the lowest background temperature used up as a reference for the definition of the threshold temperature T thr.
- T thr 115 ° C; T thr is thus between the assumed surface temperature of the workpiece 18 of 100 ° C. to be achieved and the assumed background temperature of 130 ° C.
- the control device 58 recognizes that the primary sensor location 74 has not yet reached the reference area 62 of the vehicle body 20, but is still detecting the background temperature.
- the control device 58 calculates the difference AT PS between the temperature T P at the primary sensor parts and the temperature Ts at the sub-sensor point. If this difference AT PS falls below a predetermined threshold value T ⁇ max and at least one of the two temperatures T P or Ts falls below a threshold temperature T thr , the vehicle body 20 and the sensor field 68 are positioned in the defined measuring arrangement discussed above and the temperature T P is positioned at the Primary sensor parts 74 are registered as the actual temperature Ti st of the reference area 62 of the vehicle body 20.
- the control device 58 thereby detects that the primary sensor parts 74 have not yet reached the reference area 62 of the vehicle body 20.
- T thr 115 ° C
- Ts 100 ° C .
- the temperature TP at the primary sensor part 74 is registered as the actual temperature Ti st of the reference area 62 of the vehicle body 20.
- the control device 58 initially only takes into account the temperature Ts at the sub-sensor point 76.
- the temperature TP at the primary sensor part 74 is registered as the actual temperature Ti st of the reference area of the workpiece.
- T ⁇ m ax / s 100 ° C s 1 .
- the frequency with which the temperature Ts is detected at the sub-sensor location 76 is preferably taken into account.
- the temperature Ts at the sub-sensor location 76 is queried five times per second. There are thus 0.2 seconds between two queries at the sub-sensor location 76.
- the temperature Ts suddenly drops from 130 ° C. to 100 ° C., which exceeds possible temperature fluctuations that are detected as long as the sub-sensor point 76 is at the background temperature or the workpiece temperature is recorded.
- This means a temperature change ATs amounting to 30 ° C per 0.2 seconds, which arithmetically results in a temperature change ATs 150 ° C s 1.
- T ⁇ m ax / s 100 ° C s 1
- the primary sensor location 74 and the sub-sensor location 76 are defined in the sensor field 68 in such a way that the Sub-sensor point 76 leaves the workpiece 18 during the relative movement of workpiece 18 and sensor field 68 before the primary sensor parts 74 and no longer scans, it being assumed as the initial situation that both the sub-sensor point 76 and the primary Sensor parts 74 scan the workpiece 18. This is the case, for example, with the vehicle body 20 when the sensor field 68 reaches the end of the rocker arm 64.
- the primary sensor parts 74 follow the sub-sensor location 76 in the direction of movement of the sensor field 68.
- the primary sensor parts 74 and the sub-sensor location 76 are interchanged.
- the primary sensor parts 74 can also run ahead or both sensor locations 74, 76 can be arranged vertically one above the other.
- the control device 58 calculates the difference AT PS between the temperature T P at the primary sensor parts and the temperature Ts at the sub-sensor point. If this difference AT PS exceeds a predetermined threshold value T ⁇ max and at least one of the two temperatures T P or Ts falls below a threshold temperature T thr , the vehicle body 20 and the sensor field 68 are positi oned in a measuring arrangement in which the primary sensor parts 74 still have the The workpiece 18 is scanned, but the sub-sensor location 76 is no longer at the moment. The temperature T P at the primary sensor point 74 is then registered as the actual temperature Ti st of the reference area 62 of the vehicle body series 20.
- both the primary sensor parts 74 and the sub-sensor location 76 measure the temperature of the workpiece 18 of approximately 100.degree. Both temperatures TP and Ts are thus smaller than T thr and the difference ATP S is smaller than the predefined threshold value T ⁇ m ax.
- the temperature TP at the primary sensor part 74 is registered as the actual temperature Ti st of the reference area 62 of the vehicle body 20.
- T ⁇ m ax / s 100 ° C s 1 .
- the temperature Ts rises suddenly from 100 ° C. to 130 ° C., which exceeds possible temperature fluctuations that are detected as long as the sub-sensor point 76 detects the workpiece temperature or the background temperature.
- the condition is thus met and the temperature TP at the primary sensor part 74 is registered as the actual temperature Ti st of the reference area of the workpiece.
- the sensor field 68 is evaluated there in such a way that an image Ps at the sub-sensor point 76 can be derived from the sub-sensor point 76.
- control device 58 compares this image Ps with a reference structure 78 of the workpiece 18 and / or of the transport system 32.
- a section 80 of the transport system 32 is exemplarily illustrated as such a reference structure 78, a skid 82 being shown there as a workpiece carrier, as has already been addressed above, in a modification of the previous figures.
- phase A the vehicle body 20 moves towards the sensor field 68 until the vehicle body 20 is detected by the sensor field 68.
- the vehicle body 20 has already been promoted a little further until it finally, in phase C, a position is reached in which the image Ps at the sub-sensor location 76 corresponds to the stored reference structure 78 of the workpiece 18 or of the transport system 32.
- the temperature TP at the primary sensor part 74 is derived and registered as the actual temperature of the reference area 62 of the vehicle body 20.
- This principle of a reference image comparison can be used both when the sensor field 68 reaches the vehicle body 20 and when the sensor field 68 leaves the vehicle body 20 again.
- the sensor field 68 can also provide additional sensors from which a temperature at the respective additional sensor location can be derived.
- FIG. 4 only one further sensor point 84 is identified; in FIG. 5, a first further sensor point 84 and a second further sensor point 86 are highlighted.
- the temperature sensor system 56 is calibrated on the workpiece 18 before the Temperiervorrich device 10 is put into operation. This can take place on the one hand in the existing temperature control device, on the other hand it can also be carried out solely on the basis of known and retrievable data about the nature and / or geometry of the workpiece 18 and the process sequence during its temperature control.
- the sensors and their prioritization in the sensor field 68 are set here.
- Prioritization is understood to mean whether the sensor point as primary sensor parts should result in a temperature of an assigned reference area of the workpiece 18 or as a sub-sensor point a reference temperature from which the correct position of an existing primary sensor part can be derived, as described above.
- the further sensor point 84 in FIG. 4 can be viewed as a further primary sensor point which is assigned to a further reference area of the vehicle body 20.
- this further reference area is only designated by 88 in phase C and is located at the transition between the front fender and the front door of the vehicle body 20.
- the fixed spatial relationship of the then two primary sensor parts 74 and 84 within the sensor field 68 defines that the second primary sensor point 84 has reached the reference area 88 assigned to it and reproduces its actual temperature if this is taken into account Criteria for the first primary sensor parts 74 are met.
- the further sensor point 84 in FIG. 4 can alternatively be viewed as a further sub-sensor point, the temperature determined at this further sub-sensor point being used in the manner described above to monitor whether the primary sensor point 74 scans the reference area 62 or not.
- the two derived temperatures can be used for different evaluation concepts, which can complement each other in this way.
- a further sensor point can also be used as further primary sensor parts or as a further sub-sensor point. If the additional sensor point is used as a sub-sensor point, the image evaluation concept can be supported by a temperature evaluation concept of the type described above.
- each point within the sensor field 68 can be used as a sensor point from which a temperature or an image can be derived, which can be used for evaluation.
- each pixel in the sensor field 68 supplies temperature information and can consequently be defined as a sensor location from which the measured temperature at this sensor location can be derived.
- a thermal imaging camera 72 provides an image of the surroundings or the background covering the sensor field 68, so that an image is captured at a respective sub-sensor location at one or more freely definable sub-sensor locations, which in this case describe a surface area can be.
- Temperatures derived from the sensor field 68 and / or images derived from the sensor money 68 can also be used to detect and / or check the position of the workpiece 18 in the temperature control tunnel 24.
- a temperature control device 10 which is designed as a batch device and in which workpieces 18 are positioned in a treatment position in which they are temperature controlled while they are stationary.
- this can be advantageous in the case of a temperature control device 10, which is operated continuously, but in which the workpieces 18 are conveyed intermittently, i.e. clocked, through the temperature control tunnel 24 and the workpieces 18 stand still at least once during the temperature control.
- the nozzles 54 can emit a respective air jet explicitly onto certain components of the workpiece 18, in the case of a vehicle body 20 for example the A, B or C-pillar or the sill 64, when the vehicle body 20 has a corresponding position relative to the Nozzles 54 occupies.
- position detection can also be advantageous in the case of a temperature control device 10 operated with continuous transport of the workpieces 18 or vehicle bodies 20.
- the detected position can be correlated with time if it is defined at what point in time a workpiece 18 should be in what position within the temperature control tunnel 24.
- the sensor field 68 of a sensor device 60 is aligned in the temperature control tunnel 24 in such a way that one or more of the above-mentioned conditions are met precisely at the point in time when the vehicle body 20 reaches a previously defined reference position.
- this reference position can be a position adapted to the nozzles 54.
- the reference position can be a position that is linked to a specific point in time of the tempering process.
- the temperature TP at the primary sensor part 74 can then be registered as the actual temperature Ti st of the reference area 62.
- the control device 58 can output a control signal to the transport system 32, so that a further conveying movement of the vehicle body 20 is set.
- the transport system 32 can also be calibrated.
- the control device 58 can communicate with the transport system 32 or its control system, which is not specifically identified here.
- the transport system 32 comprises, in a manner known per se, a control sensor system with which the position of the workpiece 18 is detected. The transport of the workpiece 18 is coordinated on the basis of the data.
- the transport system 32 uses the data available to it to determine that the workpiece 18 has reached its treatment position, it interrupts further movement of the workpiece 18.
- the control system of the transport system 32 can now act for this - Deliver the incoming signal to the control device 58 of the temperature sensor system 56.
- the conditions for data evaluation are also met with the temperature sensor system 56. If the workpiece 18 is stopped before the exact position in the temperature control tunnel 24, the conditions of the temperature sensor system 56 are not met and a feedback or error message can be given that the workpiece 18 is lagging behind its target position. It is also possible to prevent the workpiece 18 from being conveyed beyond the desired position by coordinating the sensor field 68 and the evaluation algorithms of the temperature sensor system 56 so that the conditions for registering the actual temperature Ti st are met at the moment when the workpiece 18 has reached its treatment position. At this moment, the control device 58 of the temperature sensor system 56 can provide feedback to the transport system 32, which on the one hand can end the further movement of the work piece 18 and on the other hand can calibrate its position data.
- the point in time at which the condition (s) is fulfilled can be compared with the time / position data of the transport system 32, if such data are available.
- FIG. 6 shows further possibilities for this, which are illustrated using the example of a modified temperature control device 10 for vehicle bodies 20, in which the vehicle bodies 20 are arranged with their longitudinal axis transverse to the transport direction.
- Variant A again shows a sensor window in the side wall 26, as shown in the niche 66 in FIG. If there is no pressure space 42 and / or no intermediate wall 44, a simple optical passage in the side wall 26 can suffice.
- the reference area is located at the upper edge of the rear window opening of the vehicle body 20.
- Variant B shows an exemplary embodiment in which the sensor path has to cross a pressure chamber 42, the pressure chamber 42 in this exemplary embodiment only being located near the floor 30 and not extending over the entire height of the temperature control tunnel 24. Nevertheless, in the case of a vehicle body, a reference area 62 on the rocker panel 64 can be recorded and scanned in this way.
- a through channel bears the reference character 90.
- Variant C shows the alternative that the sensor path cannot run in a straight line; there an angled sensor path is denoted by 92.
- mirror deflections and optical splitters such as prisms and the like come into consideration for this purpose.
- a reference area 62 is to be recorded on the sill 64 of the vehicle body 20
- the fourth temperature evaluation concept explained above for approach 2 is particularly applicable.
- the roof edge and the B-pillar first enter the sensor window 68 so that the actual temperature of the reference area 62 is recorded when the leading sub-sensor point 76 leaves the vehicle body 20.
- the sensor unit 70 or the sensor units 70 are coupled individually or as a sensor group to an air conditioning device 94, as is known from DE 10 2017 110 901 A1 and which is only illustrated in FIG.
- FIG. 3 A variant is shown schematically in which the sensor unit 70 is accommodated in a protective housing 96 which is coupled to a cooling device 98.
- the sensor unit 70 is cooled by a cooling fluid, preferably a cooling gas.
- Air-water coolers, eddy current / vortex coolers, pulse tube coolers or heat pipe coolers can preferably be used as the cooling device 98, as is explained in DE 10 2017 110 901 A1.
- a suitable protective housing 96 in turn has a viewing window that must remain free of contamination in order to ensure reliable sensor technology.
- a purge gas can be supplied to the viewing window in order to entrain and remove any droplets or particles precipitating there from environmental contaminants.
- the cooling gas can be conducted as flushing gas to the viewing window.
- the concepts explained above can be implemented with just a single sensor device 60. If several sensor devices 60 are present, their data can be combined and in particular several actual temperatures T i st -1, T i st -2, T i st -3, T i st -4 etc. for each existing sensor device 60.1, 60.2 , 60.3, 60.4 etc. are registered and / or the position detection is carried out if the respective conditions, which can be specified separately for each existing sensor device 60.1, 60.2, 60.3, 60.4 etc., are met.
- the data obtained from the temperature sensor system 56 can also be transmitted in real time to a production monitoring facility and visualized there; with a thermal imaging camera 72, for example, a type of live video with the temperature data and position information can be transmitted.
- an alarm signal can be generated if the temperature T i st deviates from a predetermined tolerance range and results in a poor treatment result for the workpiece 18 is feared.
- An interruption of the treatment or an adjustment of the treatment and in particular the temperature control parameters can then be carried out manually or automatically.
- Ti st falls below a lower limit temperature, for example when heating, and is consequently too cold, the temperature control system 40 can be controlled in such a way that the air temperature is increased and the workpiece 18 remains in the temperature control tunnel 24 for an additional period of time.
- the systems explained above can be used to establish automated production and quality monitoring, which can be used to react to deviations in the production or temperature control process in real time.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)
- Drying Of Solid Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020103321.4A DE102020103321A1 (de) | 2020-02-10 | 2020-02-10 | Verfahren und Vorrichtung zum Temperieren von Werkstücken, insbesondere von Fahrzeugkarosserien |
| PCT/EP2021/052573 WO2021160497A1 (de) | 2020-02-10 | 2021-02-03 | Verfahren und vorrichtung zum temperieren von werkstücken, insbesondere von fahrzeugkarosserien |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4103901A1 true EP4103901A1 (de) | 2022-12-21 |
Family
ID=74553828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21703429.7A Pending EP4103901A1 (de) | 2020-02-10 | 2021-02-03 | Verfahren und vorrichtung zum temperieren von werkstücken, insbesondere von fahrzeugkarosserien |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4103901A1 (de) |
| CN (1) | CN115038920A (de) |
| DE (1) | DE102020103321A1 (de) |
| WO (1) | WO2021160497A1 (de) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3430024A1 (de) * | 1984-08-16 | 1986-02-27 | Werner & Pfleiderer, 7000 Stuttgart | Durchlauf-tunnelofen zum trocknen lackierter gegenstaende |
| US5282145A (en) * | 1991-08-29 | 1994-01-25 | Ronald Lipson | Method of repair paint curing for production lines and apparatus |
| US20070235437A1 (en) * | 2006-04-05 | 2007-10-11 | Klobucar Joseph M | Paint oven monitoring system |
| RU2571125C2 (ru) * | 2011-03-08 | 2015-12-20 | Вэлспар Сорсинг, Инк. | Композиции и системы покрытий на водной основе с улучшенной устойчивостью к образованию натеков и относящиеся к ним способы |
| DE102012018296B3 (de) * | 2012-09-14 | 2013-10-02 | Eisenmann Ag | Verfahren und Anlage zum Beschichten von Gegenständen |
| JP6468038B2 (ja) * | 2015-04-07 | 2019-02-13 | 富士電機株式会社 | 塗装乾燥装置および塗装乾燥方法 |
| JP6584254B2 (ja) * | 2015-09-17 | 2019-10-02 | 本田技研工業株式会社 | 乾燥方法及び乾燥装置 |
| DE102017110901A1 (de) | 2017-05-18 | 2018-11-22 | Eisenmann Se | Vorrichtung zur Klimatisierung einer Kamera |
| DE102017110926A1 (de) | 2017-05-19 | 2018-11-22 | Eisenmann Se | Vorrichtung und Verfahren zum Temperieren von Werkstücken, insbesondere von Fahrzeugkarosserien |
-
2020
- 2020-02-10 DE DE102020103321.4A patent/DE102020103321A1/de active Pending
-
2021
- 2021-02-03 WO PCT/EP2021/052573 patent/WO2021160497A1/de not_active Ceased
- 2021-02-03 EP EP21703429.7A patent/EP4103901A1/de active Pending
- 2021-02-03 CN CN202180006475.XA patent/CN115038920A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN115038920A (zh) | 2022-09-09 |
| DE102020103321A1 (de) | 2021-08-12 |
| WO2021160497A1 (de) | 2021-08-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE69115831T2 (de) | Verbesserungen für Pulverbeschichtungskabinen mit geregelter Lüftung zur Beschichtung von Kraftfahrzeugen | |
| EP2018230B1 (de) | Beschichtungsanlage und zugehöriges betriebsverfahren | |
| DE102017113343A1 (de) | Verfahren und Fertigungsanlage zur Herstellung von Fahrzeugen und Oberflächenbehandlungsanlage zur Oberflächenbehandlung von Fahrzeugkarosserien | |
| WO2015169433A1 (de) | Beschichtungsanlage zur beschichtung von bauteilen, insbesondere zur lackierung von kraftfahrzeugkarosseriebauteilen | |
| EP2101926B1 (de) | Beschichtungsanlage und verfahren zur serienbeschichtung von werkstücken | |
| DE102007036585A1 (de) | Verfahren und Vorrichtung zum Falzabdichten | |
| WO2020225350A1 (de) | Beschichtungsverfahren und entsprechende beschichtungsanlage | |
| EP4338849A2 (de) | Verfahren zur kontrolle und nachbehandlung von werkstücken, kontrollanlage und behandlungsanlage | |
| DE202007019244U1 (de) | Bearbeitungseinrichtung und Fertigungsanlage | |
| EP3526534B1 (de) | Temperiervorrichtung, oberflächenbehandlungsanlage, fertigungsanlage und verfahren zur herstellung von produkten | |
| DE102011117666B4 (de) | Vorrichtung und Verfahren zum Temperieren von Gegenständen | |
| EP3990997B1 (de) | Freifahrender transportwagen und fördersystem zum fördern sowie behandlungsanlage zum behandeln von werkstücken | |
| WO2021160497A1 (de) | Verfahren und vorrichtung zum temperieren von werkstücken, insbesondere von fahrzeugkarosserien | |
| WO2018011389A1 (de) | Vorrichtung, anlage und verfahren zum temperieren von werkstücken | |
| WO2020001889A1 (de) | System und verfahren zum bestimmen eines lateralversatzes einer wechselbrücke in relation zu einem fahrzeug | |
| DE102008020077A1 (de) | Fördereinrichtung für Kfz-, insbesondere für Pkw-Karosserien oder Karosserieelemente sowie Steuer- oder Regeleinrichtung für eine derartige Fördereinrichtung | |
| EP3627084B1 (de) | Behandlungsanlage und verfahren zum behandeln von werkstücken | |
| DE102018113685A1 (de) | Anlage zum Trocknen von Fahrzeugkarosserien | |
| WO2020001706A1 (de) | Trennvorrichtung und behandlungsanlage | |
| DE202007010812U1 (de) | Vorrichtung zum Falzabdichten | |
| DE102012024367B4 (de) | Verfahren und Anlage zum zerstörungsfreien thermografischen Prüfen von Bauteilen wie Kfz-Bauteilen auf innere und/oder Oberflächenfehler bei Steigerung der Oberflächenemissivität der Bauteile | |
| EP4115131A1 (de) | Behandlungsanlage und behandlungsverfahren zum behandeln von werkstücken | |
| DE102011119733A1 (de) | Infrarot-Trocknungsanlage | |
| DE102017110926A1 (de) | Vorrichtung und Verfahren zum Temperieren von Werkstücken, insbesondere von Fahrzeugkarosserien | |
| DE102006045642A1 (de) | Beschichtungsanlage und zugehöriges Betriebsverfahren |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
| 17P | Request for examination filed |
Effective date: 20220324 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| DAV | Request for validation of the european patent (deleted) | ||
| DAX | Request for extension of the european patent (deleted) | ||
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
| 17Q | First examination report despatched |
Effective date: 20240822 |