DE102005019016A1 - Saddle joint for vehicle part has inner sheet and outer sheet with recessed edge bent round inner sheet together defining gap; method to produce said joint - Google Patents

Abstract

Saddle joint (1) has an inner sheet (2) and outer sheet (3) with an edge (5) bent around the inner sheet. The edge of the outer sheet and the inner sheet together define a gap. The outer sheet has several material recesses (6) made around its edge which reach into the gap made on the corner of the sheet. By the method the inner and outer sheets are made, adhesive is put around the edge of the outer sheet and/or inner sheet. The edge of the outer sheet is bent around the inner sheet, forming gap, adhesive is put into the gap, the joint is cleaned, dried and then coated with electro dipping lacquer and lastly sealed.

Description

The The invention relates to a folding connection, in particular for a vehicle part, with an inner panel and with an outer panel, wherein the outer panel is bent with an edge region around the inner panel, wherein the Edge area of the outer panel and the inner panel a gap define.

It is known for vehicle parts, such as doors, boot covers, rear hatches etc., an inner panel with an outer panel via a rabbet joint to connect. For this purpose, the edge region or the flange of the outer panel bent around the smaller inner panel so that a rabbet joint arises. This rabbet joint is usually produced by crimping.

Around to prevent corrosion in the rabbet joint and the flanged seam the involved sheets are glued in the seam area. Subsequently, will on the glued bead seam if necessary, applied a sealing layer, which on the one hand the crimping gap Completely closes and on the other hand includes the free sheet edge.

To Completing the connection of the two sheets will make the arrangement Inner and outer sheet coated. For this purpose, the mostly oily sheets are cleaned and washed, primed by means of an electrocoating bath and subsequently with a color and / or effect possibly multilayer coating Mistake.

Usually in doing so, the sealing is carried out before the coating steps, so that in the coating process no liquids, in particular washing liquids, get into the gap created by the seam connection, where necessary remain and cause corrosion in the long term. Therefore, the Adhesives / sealants used in excess to the Complete the gap.

For this purpose, it is known to provide either the sheets in the edge region before their beading with an excess of adhesive / sealant, so that they completely fill the gap when crimping. However, the excess portion that swells out of the gap must be removed before coating, which is expensive and hardly automatable. To get around this, is out of the US 4,719,689 It is known not to remove the swelling surplus of adhesive / sealant, but to form a seal with a suitable stamp when crimping directly on the flanged seam. However, it is accepted that the seam connection and its gap are not coated by the protective electrocoating. Thus, for example, in the case of a crack in the seal, the penetration of liquid and thus corrosion may occur.

On the other hand, it is for example from the US 5,273,606 Known to provide the gap after beading with adhesive, including the sheets are provided with individual Aussparrungen that allow injection of the adhesive into the gap of the seaming. In this case, however, it is difficult to completely fill the entire gap, so as to prevent the penetration and possibly remaining of liquids.

Therefore Sometimes a deficit of glue is used to fill the gap without Gush out of glue, so that after the step the electro dip painting a seal along the hemming seam is applied to close the remaining cavities. This consists however, the stated risk of trapping liquid from the coating process, in particular from the washing steps and electrocoating, which leads to corrosion.

On the other hand it is known from US 2003/0067187 A1, the hinge connection only after the electro-dip coating to glue or these open to designed and deliberately provided with an enlarged gap, so that the Rabbet joint washed in a simple manner and electro-dip-coated Can be without liquids in the crimping gap remain. This is the outer panel in its edge area with projections or bumps that cause a distance from the inner panel. However, slipping is due to the subsequent gluing the sheets against each other possible. Also the crimping gap needs relatively large Have dimensions to a drainage of liquids from the crimping gap or the gap to allow. This requires a higher cost during the subsequent sealing. In addition, there is a wide crimping gap or seam optically undesirable.

task The invention is therefore to provide a hinge connection, the on the one hand largely avoids or prevents corrosion and itself On the other hand, it sticks well. Furthermore, a subsequent Coating possible be. The folded seam should be visually appealing. Of course the seam connection next to it still has the required strength exhibit.

These The object is achieved by the recited in claim 1 Falzverbindung solved.

Thereby, that the outer panel has several material recesses in the edge area, the up in the gap rich, it is possible a fold connection with the usual To obtain strength, the drainage of liquids from the gap or the Bördelspalt allowed, so that these both glued, and washed, cleaned and subsequently can be dried or coated without liquids remain. In addition, the seam connection or its gap to do so not be enlarged. The surface tension the most watery liquids is already sufficiently reduced by the material recesses, so that they drain. In addition, such a 'bonding the sheets in usual Done without the risk that not glued Areas remain, the liquids contain and / or can not be sealed or coated. By the material recesses creates an open seam connection, the one in the gap intentionally allowed. It will not be contrary to the usual procedure tries the fold or its gap before the coating, in particular electrodeposition coating tight to close, but creates an open structure, which is a washing, cleaning and coating allowed. Only after these steps are the seam connection and the material recesses sealed by conventional methods if necessary.

The Material recesses can be provided at the edge of the edge region of the outer panel, so that it has a jagged edge or edge.

Also can the material recesses in the form of cutouts, so in shape from holes, im Edge area of the outer panel be provided. These cutouts can have any shapes. You can rectangular, square, oval, round, etc. be designed.

Preferably The material recesses extend into the area of the bend the rabbet joint, allowing a good drain of liquids the gap or folding gap is allowed.

Also can the material recesses are arranged in the area of the bend itself be, whereby a particularly good outflow of liquids from the gap or the folding gap is allowed.

are the material recesses in the region of the apex of the bend or the bent portion of the outer panel, arranged, so even better outflow of liquids from the gap or allowed the folding gap.

All It is particularly preferred if the material recesses in the range the crest of the bend and are arranged to the inside. Then the material recesses are optically unobtrusive from the outside. Inside is the side facing the interior of a vehicle to understand the parts provided with a hinge connection.

advantageously, the material recesses are regularly arranged, i. on the Course of the entire side of the provided with the hinge connection Partly provided. Preferably, these are straight portions of the rabbet joint. The recesses can Naturally on, as required, arranged irregularly be, if z.b. in certain places it is necessary that the fluids run better. Furthermore you can the recesses be executed at least partially oblique, if characterized by the liquids run better. At least the recesses should be arranged however so be that the liquids alone over Gravity can drain and dry when the seaming in a usual Storage is located.

If necessary is the gap an enlarged cross section to ensure drainage of viscous liquids. This is e.g. through a flange flange with enlarged radius reached.

To the washing, cleaning and electro dip painting is the Gap preferably before the further coating with -weiterem adhesive and / or sealant filled. Thus, in addition achieved high strength and good seal. This can be the area between the edge of the outer panel and the inner panel, so the area of the flanged seam itself provided with a seal become. These are so-called "cosmetic sealers", in addition to the seal in addition to a allow visually appealing course or surface of the flanged seam.

The folded seam according to the invention is preferably used in vehicle construction. Especially preferred is the use in vehicle parts, such as doors, trunk or engine compartment hoods, Flaps, walls etc. Very particularly preferred is the use in automotive parts.

Preferably The seam should be invisible from the outside. The seam connections are therefore provided on the inside of the vehicle part or show with the bent portion of the outer panel and its free Edge to the interior of a vehicle.

In order to allow any leakage into the gap or the gap penetrated liquid in case of a possible leakage of the sealing of the hemming seam, it is also advantageous if the invention Falzverbindun conditions are provided only on the lower edge of the vehicle part.

In a further advantageous embodiment have outer panel and / or inner sheet in the area of recesses indentations on. These impressions interact with the recesses so that liquids can flow better, as the resulting openings are bigger.

• (i) Herstellen eines Innenblechs;
• (ii) Herstellen eines Außenblechs mit Materialaussparungen in seinem Randbereich und ggf. mit Eindrückungen;
• (iii) ggf. Aufbringen eines Klebstoffs im Randbereich des Außenblechs und/oder Innenblechs (Alternative A);
• (iv) Umbiegen des Randbereichs des Außenblechs um den Randbereich des Innenblechs zur Ausbildung einer Falzverbindung, wobei der Randbereich des Außenblechs und das Innenblech eine Lücke definieren, in die die Materialaussparungen hineinreichen;
• (v) ggf. Einbringen eines Klebstoffs in die Lücke der Falzverbindung (Alternative B);
• (vi) Reinigen der Bleche;
• (vii) Trocknen der Bleche;
• (viii) Beschichten mit einer Elektrotauchbadlackierung; und
• (ix) Versiegeln der Falzverbindung.

The present invention also includes a method of making the previously described seaming compound. Such a method comprises the following steps:

• (i) making an inner panel;
• (ii) producing an outer panel with material recesses in its edge area and possibly with indentations;
• (iii) optionally applying an adhesive in the edge region of the outer panel and / or inner panel (alternative A);
• (iv) bending the edge portion of the outer panel around the edge portion of the inner panel to form a rabbet joint, wherein the edge portion of the outer panel and the inner panel define a gap into which the material recesses extend;
• (v) possibly introducing an adhesive into the gap of the rabbet joint (alternative B);
• (vi) cleaning the sheets;
• (vii) drying the sheets;
• (viii) coating with an electrocoating bath; and
• (ix) sealing the seam connection.

The Special feature of the method is that the bonding already before and the sealing of the seam joint both before and even after the electro-dip coating and its preparatory Steps takes place. This will be without corrosion or inclusion from corrosive liquids the cleaning and Washing steps as well as the Elektrootauchbadlackierung possible because the outer panel provided with material recesses in its edge region, the allows the outflow of fluids. Among the other advantages of the method is to the above description directed.

The Gluing the seam connection can be done either by applying adhesive before bending or flanging (Alternative A) or by subsequent supply of adhesive in the formed gap (alternative B), as both are already known in the prior art is. A bond may u.U. partially or completely eliminated, if guaranteed is that one Drying and / or aeration the fold connection is given.

Further Features, details and advantages of the invention will become apparent the following description of the drawing. Show it:

1 schematically seen a rabbet joint on a lower edge of a vehicle part in a plan view from the inside;

2 the fold connection 1 in section along the line II;

3 schematically another hinge connection on a lower edge of a vehicle part in a plan view seen from the inside;

4 the fold connection 3 in section along the line II-II;

5 schematically another hinge connection on a lower edge of a vehicle part in a plan view seen from the inside;

6 the fold connection 5 in section along the line III-III;

In 1 is a rabbet joint according to the invention 1 on a lower edge of an unspecified vehicle part in the plan view from the inside A seen here. In the corresponding 2 is a section corresponding to the line II in 1 displayed.

The seam connection 1 is from an inner panel 2 and an outer panel 3 educated. This is the slightly larger outer panel 3 with its edge area 5 around that on the outer panel 3 lying inner sheet 2 laterally folded or bent by crimping. The curved area of the outer panel 3 so embraces the edge 10 of the inner panel 2 and forms a gap 4 out. The sheets may be coated, for example with a galvanizing.

In order to seal the cavity H of the vehicle part and at the same time to give the rabbet joint a higher stability, an adhesive is formed before the beading 7 on the outer panel 3 applied before the inner panel 2 applied to this for flanging, so that the glue is between the two sheets 2 . 3 distributed during beading by the applied pressure and thus the cavity H seals and the rabbet joint 1 bonded. However, the gap remains 4 essentially without adhesive.

The border area 5 of the outer panel 3 has material recesses 6 on, extending from the free edge 9 of the outer panel 3 extend, so to speak, a jagged edge 9 train and get into the gap 4 pass.

After crimping to produce the seam connection 1 extend these material recesses 6 on the inside A of the vehicle part until about the bend of the gap 4 , Thus, a liquid can be removed by washing and drying or airing.

The material recesses 6 can over the entire straight edge area 5 of the outer panel 3 be distributed regularly. In the present case, they are provided only on the illustrated straight lower edge of the vehicle part (eg door). They are used when making the outer panel 3 punched out with.

Thus, the gap or the gap 4 cleaned and washed before the electro-dip coating. In addition, in the electrodeposition bath coating itself, the resulting protective layer can be applied within the seaming connection and therefore better protect it against corrosion. Subsequently, the seam connection 1 due to the material recesses 6 washed again and dried to remove liquids.

Before further coating with color and / or effect layers and possibly protective layers, the free edge 9 of the outer panel 3 together with the inner sheet 2 and the material recesses 6 with a seal 8th , For example, a "cosmetic sealer" sealed, which unifies in addition to its sealing function of the surface of the seam.

In 3 and 4 respectively. 5 and 6 Further embodiments of inventive folding joints are shown, which are substantially the in 1 and 2 correspond to, so that appropriate to 10 respectively. 20 increased reference numerals are used and only differences will be discussed.

In the second embodiment, in the 3 and 4 is illustrated, in contrast to the previously described embodiment, the material recesses are not arranged directly on the edge of the outer panel, but as discrete, oval and in the area of the hinge connection 11 defined bend of the gap 14 arranged holes 16 executed.

The third, in the 5 and 6 Pictured variant of a rabbet joint 21 differs from the embodiments already described in that the material recesses 26 in the region of the crest S of the bent portion of the folded joint 21 defined gap 24 at the edge 25 of the outer panel 33 are located. Here are the recesses 26 approximately circular shape and from the apex S slightly shifted toward the inside A out, so that they are not visible from the outside B of the vehicle part.

Furthermore, the material recesses 26 not sealed in the third embodiment, but left open. Thus, the gap becomes 24 the seam connection 21 also coated in the further coating and thus protected against corrosion. In addition, liquid that has entered can also flow down later during operation of the vehicle and dry the seam connection, so that no corrosion occurs.

7 shows a rabbet joint having various recesses that overlap. In 8th is the section AA shown, in which the recess in the outer panel 33 as a hole 36a is designed, and the recess in the inner panel 32 as a section 36b in the tin edge 40 , In 9 the section BB is shown. Here, the overlap created by recesses 36c in the tin edge 40 of the inner panel 32 as well as through recesses 36d in the tin edge 39 of the outer panel 33 , In both cases, the recesses overlap, causing the gap 34 , through which liquid can escape, gets bigger.

In 8th and 9 has the outer panel 33 a larger bending radius in the area of the apex S, as for example in 6 shown. This large bending radius enlarges the gap 34 , and thus allows an even faster drying of this folding area.

10 shows a rabbet joint that has a hole 46a in the inner panel 42 with a cutouts 46b in the outer panel 43 and a dent 46c combined in the fold area. In 11a is the section CC across the edge of the sheet 49 , in 11b the section DD along just below the edge of the sheet 49 shown. This extends the indentation 46c over inner sheet 42 and fold of the outer panel 43 , The externally visible area of the outer panel 43 is not from the indentation 46c touched. This creates impressions through the features 46a . 46b , Detail 46a in the inner panel, and gap 44 due to the large bending radius S at the fold a very large-sized opening, which allows a rapid drying of penetrated liquids in the rebate area.

When running in 12 and 13 , in which 13 the cut EE 12 represents, is the edge 59 of the outer panel 53 with regular sheet tongues 53a provided with the inner panel 52 overlap. Between the sheet metal tongues 53a is the edge 59 of the outer panel 53 so pruned that between this edge 59 and the bottom edge 60 of the inner panel 52 elongated cutouts 56 arise, which is almost an almost continuous, only through the sheet metal tongues 53a create an interrupted opening.

Claims (15)

Fold connection ( 1 . 11 . 21 ), in particular for a vehicle part, with an inner panel ( 2 . 12 . 22 ) and with an outer panel ( 3 . 13 . 23 ), wherein the outer panel ( 3 . 13 . 23 ) with a border area ( 5 . 15 . 25 ) around the inner panel ( 2 . 12 . 22 ) is bent over, wherein the edge region ( 5 . 15 . 25 ) of the outer panel ( 3 . 13 . 23 ) and the inner panel ( 2 . 12 . 22 ) a gap ( 4 . 14 . 24 ), characterized in that the outer panel ( 3 . 13 . 23 ) at the edge ( 5 . 15 . 25 ) several material recesses ( 6 . 16 . 26 ) that reaches into the gap ( 4 . 14 . 24 ) pass. Folding connection according to claim 1, characterized in that the material recesses ( 6 ) on the edge ( 9 ) of the edge area ( 5 ) of the outer panel ( 3 ) are provided. Folding connection according to claim 1 or 2, characterized in that the material recesses ( 16 . 26 ) in the form of cutouts in the edge region ( 15 . 25 ) of the outer panel ( 13 . 23 ) are provided. Folding connection according to one of the preceding claims, characterized in that the material recesses ( 6 ) at or into the area of the bend. Folding connection according to one of the preceding claims, characterized in that the material recesses ( 16 . 26 ) are arranged in the region of the bend. Folding connection according to one of the preceding claims, characterized in that the material recesses ( 26 ) are arranged in the region of the apex of the bend. Folding connection according to claim 6, characterized in that the material recesses ( 26 ) are arranged in the region of the apex of the bend and towards the inside. Folding connection according to one of the preceding claims, characterized in that the material recesses ( 6 . 16 . 26 ) are arranged regularly. Folding connection according to one of the preceding claims, characterized characterized in that the gap an enlarged cross section having. Folding connection according to one of the preceding claims, characterized in that the gap ( 4 . 14 ) with adhesive ( 7 . 17 ) and / or sealants ( 8th . 18 ) is filled. Folding connection according to one of the preceding claims, characterized in that the area between the edge ( 9 ) of the outer panel ( 3 ) and the inner panel ( 2 ) with a seal ( 8th ) is provided. Folding connection according to one of the preceding claims, characterized characterized in that in the region of the recesses outer panel and / or inner plate indentations exhibit. Method of producing a seaming connection according to one of the preceding claims, comprising the steps: (i) producing an inner panel ( 2 . 12 . 22 ); (ii) making an outer panel ( 3 . 13 . 23 ) with material recesses ( 6 . 16 . 26 ) in its edge area; (iii) optionally applying an adhesive ( 7 . 17 . 27 ) at the edge ( 5 . 15 . 25 ) of the outer panel and / or inner panel; (iv) bending the edge area ( 5 . 15 . 25 ) of the outer panel ( 3 . 13 . 23 ) around the edge region of the inner panel to form a rabbet joint ( 1 . 11 . 21 ), wherein the edge region ( 5 . 15 . 25 ) of the outer panel ( 3 . 13 . 23 ) and the inner panel ( 2 . 12 . 22 ) a gap ( 4 . 14 . 24 ) into which the material recesses ( 6 . 16 . 26 extend into it; (v) possibly introducing an adhesive ( 7 . 17 . 27 ) in the gap ( 4 . 14 . 24 ) of the seam connection ( 1 . 11 . 21 ); (vi) cleaning the sheets of seaming; (vii) drying the sheets of the seaming compound; (viii) coating with an electrocoating bath; and (ix) sealing if necessary ( 8th . 18 ) of the seam connection ( 1 . 11 . 21 ). Vehicle part with a folding connection after a the claims 1 to 12. Vehicle part with a manufactured according to claim 13 Fold connection.