EP2775240B1 - Device for treating a coating of a vehicle body - Google Patents

Description

The invention relates to a device for treating a coating of a vehicle body according to claim 1, inter alia consisting of a limited by sidewalls work space through which the vehicle body is movable, and a plurality of arranged on the side walls nozzles for flow of the vehicle body with tempered air, wherein the nozzles are arranged in rows oriented parallel to the direction of movement of the workpiece and wherein the number of all nozzles in the upper rows is less than the number of nozzles in the lower rows.

A device of the type mentioned is from the document US 2009/130332 A1 which already describes an apparatus for treating a coating of a vehicle body, comprising a working space bounded by side walls, through which the vehicle body can be moved. A uniform supply of heat is achieved on the one hand by radiant heat of IR radiant heaters, on the other hand by hot air blowing openings.

The US 2007/292815 A1 describes an apparatus for treating a coating of a vehicle body in a working space through which the vehicle body is movable and which has a plurality of arranged on an annular piping system nozzles for flow of the vehicle body with tempered air, but which are not arranged in the side walls.

The DE 35 15 600 C shows a blast tunnel for drying painted workpieces, in particular motor vehicle bodies. This device consists of a conveyor for transporting the workpieces through the blast tunnel and a plurality of arranged on the tunnel walls and / or ceilings nozzles, which are connected to an air conveyor system and blow air on the workpieces to be dried. The blast tunnel is divided into two zones, with the first zone viewed in the direction of passage of the workpieces consisting of a number of radiators and nozzles and the adjoining second zone consisting only of nozzles.

In addition, the pamphlets are JP 2003-236437 A and JP 2007-222821 A known. These show a quantitative adjustment of the air flow within the working space, In particular, an array of nozzles that are directed through the window opening of the vehicle body on an inner side of the bottom plate of the vehicle body.

In the known prior art, it has proven to be unfavorable that the arrangement of the nozzles must be individually adjusted to different sized vehicle bodies and the heating and / or cooling of the vehicle bodies and thus their coating is uneven.

Against this background, the invention has the object to perform a device of the type mentioned in such a way that the quality of the coating, in particular their drying, improves and / or the use of the device is easier or more flexible.

This object is achieved with a device according to the features of claim 1. The dependent claims relate to particularly expedient developments of the invention.

According to the invention, therefore, a device is provided in which on each side wall in the region of a window opening of the vehicle body at least one, preferably a single, upper row is arranged at a distance of 100 to 200 centimeters to the plane of the floor structure on a vehicle body side facing the plane such that the air is directed through the window openings in the vehicle body towards the interior facing side of the mass parts, and at least one, preferably a single, bottom row at a distance of 0 to 20 centimeters to the plane of the floor structure in the area of the floor structure of the vehicle body is arranged on a side facing away from the vehicle body of the plane, so that the nozzles of the lower row are directed to the sills and / or the floor structure of the vehicle body, the nozzles are aligned exclusively on the mass parts such that the entire vehicle body gleichm is tempered, wherein the nozzles of the upper row are aligned at an inclination angle of approximately 35 ° to the plane of the soil structure on the plane and the nozzles of the lower row are aligned at an inclination angle of approximately 15 ° to the plane of the soil structure on the plane , where the term "approximately" refers to a deviation of up to 20 percent of the specified angle.

Due to the smaller number of nozzles in the upper row less tempered air reaches areas of the vehicle body with thin and / or single-layer sheets, such as the hood or the roof. At the same time, it is possible to direct the air through the window openings in the vehicle body to the interior of the facing side of the mass parts, such as the sill and / or the soil structure. The nozzles of the lower row are directed to the mass parts, so for example sill and / or floor structure of the vehicle body. The higher number of nozzles in the lower row is advantageous because the larger number of nozzles in the lower row, a larger amount of tempered air is applied to the mass parts, such as the sill. The side wall is also called the nozzle wall.

By arranging the upper row at a distance of 100 to 200 centimeters, preferably 120 to 170 centimeters, especially 150 centimeters to the plane of the floor structure on a side of the plane facing the vehicle body, the orientation of the nozzles of the upper row is on the interior side the sill possible regardless of the size of the vehicle body.

The targeted alignment of the nozzles exclusively on the mass parts, it is possible that the entire vehicle body, so both the mass parts and the thin and / or single-layer sheets are uniformly tempered.

This not only shortens and optimizes the process duration, but also improves the quality of the coating, in particular its drying, since, for example, local overheating or stresses resulting from pronounced temperature differences are avoided.

The temperature control of the vehicle body may include heating as part of a drying process of the coating. In this case, the coating is removed by heating them to a process temperature solvent, such as water and thus hardened the coating. The temperature of the vehicle body may also include a cooling. Because for the further processing of the vehicle body whose temperature must be reduced quickly, but without tension. The coating is, for example, a paint and / or underbody protection.

Preferably, the working space, also referred to as a tunnel, exclusively nozzles, which are arranged in at least one lower row and in at least one upper row.

In particular, in the treatment of a vehicle body, it is possible to obtain a nearly ideal course of the object temperature. This is possible precisely because no nozzle is directed directly at portions of the vehicle body with thin and / or single-layer sheets, such as the doors and / or the fender. In addition, by eliminating further rows of the structure and operation of the device, especially in the treatment of different vehicle bodies, easier to implement.

According to an ideal embodiment, only nozzles in a single lower row and in a single upper row are arranged in the working space on each of the side walls. By this arrangement, only the mass parts of the vehicle body are exposed to direct air flow. This allows a uniform heating or cooling of all parts of the vehicle body.

An embodiment of the device is that the lower row is arranged at a distance of 0 to 20 centimeters, preferably from 2 to 8 centimeters, in particular 5 centimeters, on a side facing away from the vehicle body of a plane. This plane is defined by the underside of the vehicle body facing the transport device. The plane represents the position of the floor structure of the vehicle body. Depending on the requirement, in particular with regard to the coating materials used and their process requirements, it is possible by virtue of the above-mentioned arrangement of the nozzles to direct the nozzles at least partially onto the outside of the floor structure.

The nozzles of the lower row can also be arranged on the vehicle body side facing the plane. This is useful when the nozzles of the lower row are directed almost exclusively on the sill. An incident flow of the outside of the floor structure is in this case only indirectly, for example via a reflection of the air flow at the bottom of the work cabin possible.

Preferably, the distance between the upper rows and the lower rows is greater than 2 meters and less than 3 meters between the opposite side walls. A distance of approximately 2.5 meters has proven to be ideal for all vehicle bodies of passenger cars.

The dimensions presented above allow a treatment of a wide variety of vehicle bodies, without having to change the working space and / or the arrangement or the orientation of the nozzles. This facilitates the construction and operation of the device and leads to a very flexible operational suitability, in particular with regard to a high body diversity.

According to a preferred embodiment it is provided that the nozzles are designed to be adjustable at least in relation to the inclination angle. For example, it is possible to vary the distribution of the air quantity of the nozzles of the lower row on the outside of the sill and soil structure. As a result, the treatment process can be adapted flexibly to a change in the coating, for example the underbody protection. Due to the adjustable angle of inclination, it is possible to direct each individual nozzle of the upper row on the sill and / or on the roof spar and to distribute the amount of air according to the orientation of the nozzles.

One section ideally extends over the entire height of the working space. Preferably, within a section, the nozzles of the individual rows are evenly distributed in the longitudinal direction. Preferably, a section is approximately 1 meter wide.

It has proved to be favorable that in the lower row 2 to 4 nozzles, preferably 3 to 4 nozzles per meter and / or per section are provided. This density of nozzles has changed for a treatment of vehicle bodies, especially for passenger cars, proven optimal. The air flow generated by this distribution of the nozzles changes the temperature of the vehicle body quickly and evenly.

This advantage has also been found for the number and / or arrangement of the nozzles in the upper row, which is diverging in favored execution of adjacent sections from each other, in particular alternately.

Ideally, in the upper row, the nozzles on the opposite side walls are arranged offset in such a way that the air streams of the individual nozzles do not meet and / or intersect. This has the advantage that the air currents flowing diagonally through the interior of the vehicle body from the upper rows do not influence and / or distract each other. For this purpose, it is provided in an alternative embodiment of the device that in the upper row, the number and / or arrangement of the nozzles is designed to differ from each other in opposite sections.

With the density or the number of nozzles in the upper row within a section, 0 to 4 nozzles have been found to be advantageous. Two concrete embodiments are particularly promising. In one embodiment, alternately 0 and 3 nozzles per meter and / or section are provided in the adjacent sections in the upper row. In the alternative embodiment, 1 and 2 nozzles per meter and / or section are alternately provided in the adjacent sections in the upper row.

Fig. 1

eine schematische Darstellung eines Querschnitts der Vorrichtung;

Fig. 2

eine weitere schematische Darstellung der in Figur 1 dargestellten Vorrichtung;

Fig. 3

eine weitere schematische Darstellung der in Figur 1 dargestellten Vorrichtung;

Fig. 5

eine schematische Darstellung einer zweiten Variante der Verteilung der Düsen bei der in Figur 1 dargestellten Vorrichtung.

The invention allows numerous embodiments. To further clarify its basic principle, one of them is shown in the drawing and will be described below. This shows in

Fig. 1

a schematic representation of a cross section of the device;

Fig. 2

another schematic representation of in FIG. 1 illustrated device;

Fig. 3

another schematic representation of in FIG. 1 illustrated device;

Fig. 5

a schematic representation of a second variant of the distribution of the nozzles in the in FIG. 1 illustrated device.

FIG. 1 shows the device 1 according to the invention for the treatment of a coating of a vehicle body 2 in a sectional view. The device 1 consists of a limited by side walls 3 working space 4. Within the working space 4, the vehicle body 2 is movable. For this purpose, the vehicle body 2 is arranged on a transport device 5. The treatment of the coating is heating to dry the coating or cooling after drying. The device 1 further consists of a plurality of arranged on the side walls 3 nozzles 6 for flow of the vehicle body 2 with tempered air. The nozzles 6 are parallel to the in the FIGS. 4 and 5 illustrated movement direction 7 of the vehicle body 2 oriented rows 8, 9 are arranged. On each side wall 3, an upper row 9 is arranged in the region of a window opening 10 of the vehicle body 2. Furthermore, a lower row 8 is arranged on each side wall 3 in the region or in the plane 11 of the floor structure 12 of the vehicle body 2. The number of nozzles 6 in the upper row 9 is less than the number of nozzles 6 in the lower row 8. The nozzles 6 of the upper row 9 are on the window opening 10 in the vehicle body 2 and on the interior of the vehicle body 2 facing side a positioned in the working space 4 diametrically to the nozzle 6 sill 13 and / or the roof rail of the vehicle body 2 directed. The orientation of the nozzles 6 of the upper row 9 is indicated by a dotted line 17. The nozzles 6 of the lower row 8 are directed to the outside of the vehicle body 2 associated side of the sill 13 and / or the bottom structure 12 of the vehicle body 2. The side walls 3 of the working space 4 and the outer walls 14 of the device 1 include a pressure chamber 15. About the pressure chamber 15, the nozzles 6 are supplied with the tempered air. In the pressure chamber 15 6 filters 16 are arranged in front of the nozzles.

FIG. 2 shows in a sectional view of the device 1, the invention-specific dimensions of the device 1. The lower row 8 is arranged with a vertical distance 18 to the plane 11 of the floor structure 12 on a vehicle body 2 side facing away from the plane 11. The distance 18 is 5 centimeters and refers to the central axis of the nozzle 6 or with an inclined and / or pivotable nozzle 6 to the intersection of the axis of rotation and central axis of the nozzle 6. The nozzles 6 of the lower row 8 are in one Inclination angle 20 of approximately 15 ° to the plane 11 of the floor structure 12 is aligned with the plane 11. The upper row 9 is arranged at a vertical distance 19 to the plane 11 of the floor structure 12 on a side of the plane 11 facing the vehicle body 2. The distance 19 is 150 centimeters and refers to the central axis of the nozzle 6 or with an inclined and / or pivotable nozzle 6 to the intersection of the axis of rotation and center axis of the nozzle 6. The nozzles 6 of the upper row 9 are at an inclination angle 21 of approximately 35 ° to the plane 11 of the floor structure 12 aligned on the plane 11. The side walls 3 have a distance 22 of 2.5 meters.

FIG. 3 shows in a sectional view in the FIGS. 1 and 2 To clarify the advantage according to the invention, it is shown here that the device 1, in particular with the arrangement and alignment of the nozzles and the dimensions of the device 1, can be used for many different vehicle bodies 2 of different passenger cars. When changing the type of the vehicle body 2, a change or adaptation of the device 1 is not required.

The FIGS. 4 and 5 show the in the FIGS. 1 to 3 illustrated device 1. In the middle of the figures, a cross section through the device 1 is shown. The two oppositely disposed side walls 3 of the working space are shown on the left and right next to the cross section. The side walls 3 of the device 1 are divided into sections 23. The sections 23, also called panels, have a width 24 preferably of 1 meter. Within the individual sections 23, the nozzles 6 of the individual rows 8, 9 are distributed uniformly in the longitudinal direction, ie parallel to the direction of movement 7. The number of nozzles 6 in the upper row 9 is smaller than the number of nozzles 6 in the lower row 8. In the lower row 8 are preferably three to four nozzles 6 per meter and / or each section 23 is provided. The number and / or arrangement of the nozzles 6 in the upper row 9 is at different portions 23 and at opposite portions 23 different from each other, in particular alternately.

FIG. 4 shows a first variant of the arrangement of the nozzles 6 on the side walls 3. In the lower row 8 four nozzles 6 per meter and / or each section 23 are provided. In the upper row 9, a section 23 is executed without nozzles, while the adjacent to the section 23 without nozzles 6 or opposing sections 23 have three nozzles 6.

FIG. 5 shows a second variant of the arrangement of the nozzles 6 on the side walls 3. In the lower row 8 three nozzles 6 per meter and / or each section 23 are provided. In the upper row 9, a section 23 is designed with a nozzle 6, while the adjacent to the section 23 with a nozzle 6 or opposite sections 23 have two nozzles 6. The individual nozzles 6 of the upper and lower rows 8, 9 are vertically aligned with each other in this variant, so that they are arranged in the upper row 9 at a portion 23 with a nozzle 6 vertically above the central nozzle 6 of the lower row 8 and at a portion 23 are arranged with two nozzles 6 vertically above the outer nozzles 6 of the lower row 8.

LIST OF REFERENCE NUMBERS

1

device

2

vehicle body

3

Side wall

4

working space

5

transport device

6

jet

7

movement direction

8th

bottom row

9

upper row

10

window opening

11

level

12

soil structure

13

sill

14

outer wall

15

pressure chamber

16

filter

17

Dotted line (axis of the air jet)

18

Distance (lower row)

19

Distance (upper row)

20

Inclination angle (lower row)

21

Inclination angle (top row)

22

Distance (side walls)

23

Section (panel)

24

Width (section)

Claims (7)

1. Device (1) for treating a coating of a vehicle body (2), consisting of a workspace (4), which is delimited by side walls (3) and through which the vehicle body (2) can be moved, and a plurality of nozzles (6), arranged on the side walls (3), for supplying the vehicle body (2) with temperature-controlled air, wherein the nozzles (6) are arranged in rows (8, 9) oriented in parallel to the direction of movement (7) of the vehicle body (2), and wherein the number of all nozzles (6) in the upper rows (9) is less than the number of nozzles (6) in the lower rows (8), characterized in that, on each side wall (3) in the region of a window opening (10) of the vehicle body (2), at least one - preferably, a single - upper row (9) is arranged at a distance (19) of 100 to 200 centimeters to the plane (11) of the floor structure (12) on a side of the plane (11) facing the vehicle body (2), so that the air is directed through the window openings (10) in the vehicle body (2) towards the side, facing the interior, of the mass parts, and, in the region of the floor structure (12) of the vehicle body (2), at least one - preferably, a single - lower row (8) is arranged at a distance (18) of 0 to 20 centimeters to the plane (11) of the floor structure (12) on a side, facing away from the vehicle body (2), of the plane (11), so that the nozzles of the lower row are directed directly towards the sill and/or the floor structure of the vehicle body, wherein the nozzles (6) are directed exclusively toward the mass parts in such a way that the entire vehicle body (2) is at a uniform temperature, wherein the nozzles (6) of the upper row (9) are directed towards the plane (11) at an inclination angle (21) of approximately 35° to the plane (11) of the floor structure (12), and the nozzles (6) of the lower row (8) are directed towards the plane (11) at an inclination angle (20) of approximately 15° to the plane (11) of the floor structure (12), wherein the specification, "approximately," refers to a deviation of up to 20 percent of the specified angle.
2. Device (1) according to claim 1, characterized in that at least some of the nozzles (6) are designed to be adjustable at least with respect to the inclination angle (20, 21).
3. Device (1) according to at least one of the preceding claims, characterized in that the side walls (3) are at a distance of 2 to 3 meters - preferably, 2.5 meters - and/or the side walls (3) are divided into several sections (23).
4. Device (1) according to at least one of the preceding claims, characterized in that 2 to 4 nozzles (6) - preferably, 3 to 4 nozzles (6) - per meter and/or per section (23) are provided in the lower row (8).
5. Device (1) according to at least one of the preceding claims, characterized in that 0 to 4 nozzles (6) - preferably, 0 and 3 or 1 and 2 nozzles (6) - per meter and/or section (23) are provided within a section (23) in the upper row (9).
6. Device (1) according to at least one of the preceding claims, characterized in that, in the upper row (9), the number and/or arrangement of the nozzles (6) in adjacent sections (23) are designed to be different from one another - in particular, to be alternating.
7. Device (1) according to at least one of the preceding claims, characterized in that, in the upper row (9), the number and/or arrangement of the nozzles (6) in opposing sections (23) are designed to be different from one another.

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