DE102019204725B4 - Application unit for seal analysis and procedure - Google Patents

Abstract

Application unit (20) for attaching a sealing profile (8) to a body component (2) serving to close a body opening, comprising a rolling head (22) with a rotatable pressure roller (24) for pressing the sealing profile (8) onto the body component (2), and at least one laser profile sensor (30) pivotable with respect to the rolling head (22) for generating a 2-dimensional profile of the body component (2) and / or sealing profile (8) applied to the body component (2).

Description

The invention relates to an application unit for attaching a sealing profile to a body component used to close a body opening and a measuring device for determining the position and a method for analyzing the surface of a body component and / or a sealing profile applied to the body component.

Such sealing profiles are provided, for example, to produce a sealing connection between a body opening and the body part inserted in it. The sealing profiles can be attached either on the body side or on the body part side or on both sides. A body part can be, for example, a door, a trunk lid or a sliding roof element. In the present case, it is either a matter of applying a sealing profile to or in a door cutout, for example a body, and of measuring the correct position of the applied sealing profile. Alternatively, a sealing profile can also be applied to the outside of a vehicle door - that is to say on the side of the body part - which is then inserted into the door cutout of the body in an assembly situation. The sealing profile is glued to an adhesive flange of either the door cutout or the vehicle door, for example with a so-called application head. An adhesive flange is generally the area of a body flange or door flange to which the sealing profile is applied.

From the point of view of quality assurance, there are now two areas in which it is necessary to demonstrate the positional accuracy of the applied sealing profile by measuring methods. On the one hand, this is initially the position of the adhesive flange, either the vehicle door or the door cutout of the body part to which the sealing profile is to be applied. The position of the adhesive flange varies as a result of unavoidable manufacturing tolerances. On the other hand, this is the position of the applied sealing profile per se, the lateral deviation from a reference line or reference curve extending in the longitudinal direction of the sealing profile being of particular interest.

Conventionally, the position of the adhesive flange on the one hand and the position of the applied sealing profile on the adhesive flange on the other hand are recorded by complex optical methods, for example using complex optical or image-based methods or directly on the component with the simplest means by eye, which include, for example, gauges, templates or scratch lines and measured using a tape measure. While rough outliers can still be recognized in this way, this procedure is too imprecise for an exact measurement and impractical as a basis for initiating corrective measures. In addition, no statistical evaluation to document quality control can be based on this. As prior art for an image-based method, the DE 10 2016 203 842 A1 which describes a detection device with a CCD sensor, for example. Due to the principle involved, image-based methods have the disadvantage that, although an image is generated, this must then be subjected to an assessment in order to be able to make a statement, for example, on compliance with positional tolerances. The image data cannot be fed directly to an analysis. In addition, the DE 197 42 257 A1 which describes a device in which the edge of the adhesive flange is to be precisely determined using several laser scanning sensors. The document "Precise 2D / 3D surface measurement with laser profile scanners" from August 22nd, 2017 on the online presence www.all-electronics.de deals with the detection of the microscopic surface properties of workpieces. To this end, it is described that the third dimension of the surface can be determined by moving the profile sensor in a direction perpendicular to the measurement object.

For a precise determination of the position of the adhesive flange and / or the applied sealing profile both during the commissioning phase and during the subsequent series production, it is necessary that the measurement methods used are reliable, if possible directly in the production line or randomly in a parallel cycle, without cycle time losses and with a manageable additional Effort can be carried out. The aim is to achieve the highest possible level of automation in the process.

Based on this, the object of the present invention is to provide a device and a method that can be carried out with it, with which the requirements for a statistical evaluation for documenting the quality control can be met and, moreover, the measurement accuracy is at a sufficiently high level.

The object is achieved by an application unit for attaching a sealing profile to a body component used to close a body opening, with a rolling head with a rotatable pressure roller for pressing the sealing profile onto the body component, and at least one laser profile sensor for generating a 2-dimensional profile of the body component and / or sealing profile applied to the body component. According to the invention, the laser profile sensor immediately becomes a further usable sensor 2-dimensional profile of the respective surface generated, whereby the generated data does not require any further conversion or interpretation. The laser profile sensor is preferably fastened to the rolling head in such a way that it moves around the area of the adhesive flange or the applied sealing profile from the outside of the component in order to avoid collisions. In order to obtain the most meaningful data possible, it is advantageous if the laser profile sensor is placed as close as possible to the pressure roller.

According to the invention it is provided that the laser profile sensor can be pivoted with respect to the rolling head. This makes it possible for the optimal angle of the laser to the component surface to be set depending on the curvature of the component surface to be traced. A pivotable arrangement in each case with a plurality of laser profile sensors is also advantageous, since a laser profile sensor may require a considerable amount of space so that a collision with one of the other sensors can be avoided. In a preferred embodiment, a stepper motor is provided for pivoting the laser profile sensor.

The object is also achieved by a method for analyzing the surface of a body component and / or a sealing profile applied to the body component, in which a laser profile sensor carried by an application unit generates a sealing profile 2 generated by the body component and / or the sealing profile applied to the body component -dimensional profile is compared with a family of reference curves generated by the body component and / or the sealing profile applied to the body component. The family of reference curves is preferably mapped in analysis software and made available via this. The advantage is that it is not an image-based method in which the generated image must first be subjected to an analysis with respect to the image data itself, but the 2-dimensional profile generated according to the invention is already available in a data format that can be further processed immediately can, that is, can be subjected to an analysis based on the family of reference curves.

According to the invention, the method provides that a swivel angle of the laser profile sensor with respect to a rolling head of the application unit is set as a function of a surface curvature of the body component. This is particularly advantageous when several laser profile sensors are used, so that the risk of collision can be minimized or even excluded by pivoting. In addition, optimal surface detection can be achieved by giving it away, since the laser profile sensor can track the component curvature that has just been traversed.

An advantageous embodiment of the method provides that by mapping the family of reference curves on the basis of coordinate reference values, the coordinate reference values being derived from intersections of the straight lines abstracting the respective reference curves and being compared with coordinate measurement values acquired via the laser profile sensor. Here, the reference values can be generated in a simple manner from a CAD model or can also be generated in an initial measuring process with the laser profile sensor on a limit sample component.

An advantageous embodiment of the method provides that difference values detected between the coordinate reference values and the coordinate measured values are fed to a statistical evaluation.

• 1 eine schematische Darstellung eines unteren Bereichs eines Karosseriebauteil mit einem Dichtungsprofil;
• 2 eine schematische Darstellung eines unteren Bereichs eines Karosseriebauteil mit einem Dichtungsprofil und einer erfindungsgemäßen Applikationseinheit;
• 3 eine schematische Darstellung des Verfahrens zur Dichtungsanalyse des Dichtungsprofil und
• 4a) bis 4c) verschiedene Darstellungen des Karosseriebauteils mit unterschiedlichen Bauteilkrümmungen im Verhältnis zu der Applikationsvorrichtung.

The invention is explained below with further features, details and advantages on the basis of the accompanying figures. The figures merely illustrate exemplary embodiments of the invention. Show in it

• 1 a schematic representation of a lower area of a body component with a sealing profile;
• 2 a schematic representation of a lower area of a body component with a sealing profile and an application unit according to the invention;
• 3 a schematic representation of the method for the sealing analysis of the sealing profile and
• 4a) to 4c ) Different representations of the body component with different component curvatures in relation to the application device.

The 1 shows a schematic representation of a cross section through a lower region of a body component 2 in the form of a door of a vehicle, with the reference number 4th the outer door skin and with the reference number 6th the door bottom is designated. The sheet metal of the door bottom 6th has a usual course with several bends or bulges. With the sealing profile 8th it is preferably a hollow profile seal with a hose part 10 , a sealing base 12th and a sealing slot 14th between the hose part 10 and the sealing base 12th . The sealing profile 8th is via an adhesive strip 16 on the surface to be designated as the adhesive flange 18th on the door bottom 6th held. About the sealing profile 8th can the body component 2 in the closed state, for example, be sealed against a side sill area of the vehicle.

The 2 shows an embodiment of an application unit according to the invention 20th in a situation where a sealing profile 8th on the adhesive flange of a body component 2 is applied. The application unit 20th initially comprises a rolling head 22nd with a rotating pressure roller 24 for pressing the sealing profile 8th on the adhesive flange 18th of the body component 2 . There are further elements of the rolling head 22nd , such as a conveyor unit, not shown. The pressure roller 24 is around an axis of rotation D. rotatable on a holding element 26th of the rolling head 22nd held. Furthermore is on the rolling head 22nd a laser profile sensor 30th held. The laser profile sensor 30th is preferably pivotable about a pivot axis S. on the rolling head 22nd arranged, with a bracket 28 can be provided over which the laser profile sensor 30th on the holding element 26th is held. The laser profile sensor 30th expediently has an image capturing element 36 to capture the generated 2-dimensional profile. For swiveling the laser profile sensor 30th around the pivot axis S. can be a suitable rotary actuator 32 be provided, which is preferably designed as a stepper motor.

In the 2 is the laser beam emitted by the laser profile sensor 34 funnel-shaped in the direction of the body component 2 Shown widened, if it is able on the component side, both an area of the body component and an area of the sealing profile that has already been applied 8th to leave.

In the 3 is a comparison of a reference curve 40 with a measured value curve traced by the Lase profile sensor 42 shown. The reference curve 40 is shown in dashed lines here and has been read, for example, from an existing CAD model. The measured value curve 42 is shown with a solid line. Both the reference curve 40 as well as the measured value curve 42 are modeled or mapped in sections using straight lines. That means, over the entire course of the reference curve, neighboring areas of curvature are mapped by straight lines. Adjacent straight lines are then extended in both directions so that there is an intersection in each case 44 with the respective adjacent straight line. These intersection points form simple coordinate values for the reference state. A corresponding modeling or mapping is carried out with the recorded measured value curves, so that these also act as intersection points 46 are mapped by straight lines and these intersection points represent coordinate values of the actual state.

The 4a) , 4b) and 4c ) each show the arrangement of the pressure roller 24 at different component curvatures and in both directions of the laser beam 34 namely once before the seal application and once after the seal application. The direction of movement of the pressure roller 24 runs from right to left.

List of reference symbols

2

Body component

4th

Outer door skin

6th

Door bottom

8th

Sealing profile

10

Hose part

12th

Sealing base

14th

Sealing slot

16

Adhesive tape

18th

Adhesive flange

20th

Application unit

22nd

Rolling head

24

Pressure roller

26th

Retaining element

28

Bracket

30th

Laser profile sensor

32

Slewing drive

34

laser beam

36

Image capture element

40

Reference curve

42

Measured value curve

44

Intersection

46

Intersection

S.

Swivel axis

D.

Axis of rotation

Claims (7)

Application unit (20) for attaching a sealing profile (8) to a body component (2) serving to close a body opening, comprising a rolling head (22) with a rotatable pressure roller (24) for pressing the sealing profile (8) onto the body component (2), and at least one laser profile sensor (30) pivotable with respect to the rolling head (22) for generating a 2-dimensional profile of the body component (2) and / or sealing profile (8) applied to the body component (2). Application unit (20) after Claim 1 , characterized in that the at least one laser profile sensor (30) is an image acquisition element (36) has, for detecting the generated 2-dimensional profile. Application unit (20) after Claim 1 or 2 , characterized in that a stepping motor (32) is provided for pivoting the laser profile sensor (30). Method for analyzing the surface of a body component (2) and / or a sealing profile (8) applied to the body component (2), in which a laser profile sensor (30) carried by the body component (2) with a laser profile sensor (30) carried along by the body component (2) and / or the 2-dimensional profile generated and recorded on the body component (2) is compared with a set of reference curves generated by the body component (2) and / or the sealing profile (8) applied to the body component (2), and a swivel angle of the laser profile sensor (30) with respect to a rolling head (22) of the application unit (20) is set as a function of a surface curvature of the body component (2). Procedure according to Claim 4 , characterized by capturing the 2-dimensional profile via an image capturing element (36) of the laser profile sensor (30). Method according to one of the Claims 4 or 5 , characterized by mapping the family of reference curves on the basis of coordinate reference values, the coordinate reference values being derived from intersections of the straight lines abstracting the respective reference curves and being compared with coordinate measurement values recorded via the laser profile sensor (30). Procedure according to Claim 6 , characterized in that difference values detected between the coordinate reference values and the coordinate measured values are fed to a statistical evaluation.

Images