DE102018119812A1 - Plastic component-metal component combination - Google Patents

Abstract

A plastic component-metal component combination comprises a plastic component and a metal component, between which at least one fluid flow path is formed. The connection between the plastic component and the metal component takes place with the aid of a separate plastic hold-down, which is welded to the plastic component and positively connected to the metal component.

Description

Technical area

The invention relates to a plastic component-metal component combination such as an oil module-cooler combination according to the preamble of claim 1.

State of the art

In the EP 1 876 406 B1 an oil filter-oil cooler combination is described, which are juxtaposed both arranged on a distributor plate. The distributor plate is provided with channels through which the flow connection between the oil cooler and the oil filter. The distributor plate is designed as a die-cast or injection-molded part with which the heat exchanger is soldered and welded. The oil filter is bolted to the distributor plate.

Disclosure of the invention

The invention has for its object to provide a solid connection between a plastic component and a metal component, such as an oil module and a radiator with simple constructive measures.

This object is achieved with the features of claim 1. The dependent claims indicate expedient developments.

The plastic component-metal component combination according to the invention is an assembly of a plastic component and a metal component, which as a whole forms a device which serves a defined purpose. The plastic component and the metal component interact functionally. The plastic component is, for example, an oil module for the filtration of transmission oil in the transmission of a motor vehicle; the metal component may accordingly be an oil cooler.

The plastic component and the metal component lie against each other and are connected to each other. Plastic component and metal component adjoin one another directly, wherein over the contact surface between the plastic component and metal component, a flow path for a fluid that flows from the plastic component to the metal component and / or vice versa. In the plastic component and in the metal component in each case at least one channel is introduced, wherein the channels are aligned with each other and allow a fluid exchange between the plastic and metal component. If appropriate, a plurality of channels can be introduced into the plastic component and into the metal component, which in each case are aligned with one another. Furthermore, it is possible that either only one fluid or several different fluids flow in different channels between the plastic component and the metal component, for example in the case of an oil module-cooler combination oil and cooling water.

The connection between the plastic component and the metal component takes place with the aid of a hold-down made of plastic, which is designed as a separate component. The hold-down does not completely surround the metal component, but only in the region of the connection to the plastic component. The hold-down does not have the function of a cover or a cover of the metal component, but serves only for fastening the metal component to the plastic component. The hold-down does not form fluid channels or surround a volume of fluid. Thus, a simple and material-saving design of the hold-down is possible.

The hold-down made of plastic is welded to the plastic component and positively connected to the metal component. This embodiment has the advantage that for the connection between the plastic component and the metal component only a material connection between the hold-down and the plastic component and a positive connection between the hold-down and the metal component must be made. The plastic component and the hold-down are each made of plastic and can be easily connected in a known manner cohesively, in particular welded, for example by friction welding or laser welding. On the other hand, it is not necessary to produce a cohesive connection or a mechanical connection such as a screw connection or clip connection between the hold-down device and the metal component; it is sufficient to produce a positive connection between the hold-down device and the metal component, based on the release or securing direction between the plastic component and the metal component.

To establish the connection between the plastic and the metal component, both components are placed against each other, so that the components are directly adjacent to each other. Subsequently, the hold-down is placed on the metal component, wherein a portion of the metal component is enclosed by the hold-down in a form-fitting manner, after which the hold-down can be materially connected to the plastic component. Due to the positive connection between the hold-down and the metal component, the firm connection between the plastic and metal component is produced at the same time with the production of the material connection.

It is also possible to put the hold-down in a first step on the metal component and then in a second step to spend the metal component in the contact position to the plastic component, after which the cohesive connection between the hold-down and the plastic component can be produced.

It is sufficient to produce the connection between plastic and metal component exclusively via the hold-down and the cohesive connection to the plastic component. Additional connection measures, such as screw connections, between the plastic component and the hold-down device, between the hold-down device and the metal component or directly between the plastic component and the metal component may be dispensed with, although in alternative embodiments such connection measures may nonetheless be provided.

The hold-down device can be designed as a frame-shaped, circumferential component. In this embodiment, the frame-shaped hold-down can be placed on the metal component, so that the hold-down encloses the metal component. A shoulder of the hold-down protrudes beyond the metal component and forms a welding surface for welding to the plastic component. The frame-shaped hold-down only has the function of holding the metal component. The frame-shaped hold-down surrounds the metal component in a radial direction perpendicular to the mounting direction circumferentially in the region of a welding surface, wherein the metal component protrudes through the frame-shaped hold-down. The frame-shaped holding down does not completely cover the metal component. The frame-shaped hold-down does not completely surround the metal component, for example in the manner of a lid.

In an alternative embodiment, the hold-down is not circumferentially formed like a frame, but extends only partially along the outside of the metal component; the hold-down is in this case, for example, strip-shaped, L-shaped or U-shaped, wherein a laterally projecting beyond the metal component portion forms a welding surface for welding to the plastic component. At the welding surface of the blank holder, a welding seam is produced with the welding process, which is located correspondingly between the plastic component and the blank holder. The weld transfers the holding forces between the hold-down and thus also the metal component and the plastic component. The weld also provides flow-tightness between the plastic and metal components, so that fluid that is exchanged between the plastic component and the metal component can not escape laterally from the plastic component-metal component combination. In particular, in the circumferential execution of the weld is also given a circumferential tightness.

A circumferential weld can also be produced by welding several individual hold-downs to the plastic component and connecting the hold-downs in the circumferential direction.

According to yet another advantageous embodiment, a sealing element is arranged in the contact region between the plastic component and the metal component, which is pressed by the holding force between the plastic component and the metal component. Advantageously, each channel is enclosed in the contact region between the plastic component and the metal component by a sealing element. The sealing element is in this case formed, for example, as a sealing ring, which surrounds the mouth region of the channel in the contact region. The holding force between plastic and metal component causes a compression of the sealing element and thereby increases the sealing effect.

According to an advantageous embodiment, the sealing element is inserted into a groove which is located in the plastic component or in the metal component. The open groove side faces the other component and is acted upon by the other component, whereby the compression of the sealing element is achieved. The groove depth and the sealing element are dimensioned, for example, so that the sealing element protrudes in the unloaded state on the groove and can be acted upon by the other component. But it is also possible that a projection is arranged on the other component, which projects into the groove and acts on the sealing element located therein with a pressing force.

According to a further expedient embodiment, there is a gap between the hold-down device and a side wall of the metal component. The hold-down is thus not directly on the side wall of the metal component, but has an at least slight distance from the side wall of the metal component. The gap has the advantage that there is a labyrinth seal for the fluid, which is exchanged between metal and plastic component. Any laterally exiting fluid between the metal and plastic component can collect in the gap between the hold-down and the side wall of the metal component.

According to a further expedient embodiment, a laterally projecting retaining collar is formed on the metal component, on which the hold-down rests. The retaining collar is in particular made in one piece with the metal component. The retaining collar forms a support surface for the hold-down for positive connection. So far one Gap is formed between the side wall of the metal component and the hold-down, the bottom of the gap is preferably formed by this laterally projecting retaining collar of the metal component.

According to yet another expedient embodiment, a circumferential, elevated boundary edge is formed on the plastic component, which faces the metal component and which limits the edge region of the metal component. The raised boundary edge on the plastic component accommodates the metal component, so that it is received in a form-fitting manner on the plastic component in the transverse direction-transverse to the holding force between the metal component and the plastic component. After welding of the blank holder with the plastic component thus plastic component and metal component are both in the direction of the holding force and in the plane which is orthogonal to the holding force, firmly connected.

According to a further advantageous embodiment, the hold-down on the peripheral boundary edge and is welded to the boundary edge. The bearing surface between the boundary edge and the hold-down thus forms a welding surface.

According to yet another expedient embodiment are in the mounted state of the boundary edge and the retaining collar at the same height and connect directly to each other, whereby a common bearing surface is formed for the hold-down. The hold-down is welded in its contact region to the boundary edge with this and at the same time holds in its contact region to the retaining collar the metal component positively on the plastic component.

According to a further advantageous embodiment, a groove is introduced into the hold-down device, which rests in the mounted state on the retaining collar of the metal component. The groove in the hold-down device can serve for receiving fluid which emerges in a fault current between the plastic component and the metal component.

list of figures

• 1 eine perspektivische Darstellung einer Kunststoffbauteil-Metallbauteil-Kombination, ausgeführt als Ölmodul-Kühler-Kombination, wobei das Ölmodul das Kunststoffbauteil und der Kühler das Metallbauteil bildet und diese Bauteile über einen Niederhalter miteinander verbunden sind,
• 2 einen Schnitt durch die Ölmodul-Kühler-Kombination gemäß 1, und
• 3 eine vergrößerte Darstellung des Schnittes im Bereich des Niederhalters.

Further advantages and expedient embodiments can be taken from the further claims, the description of the figures and the drawings. Show it:

• 1 a perspective view of a plastic component-metal component combination, designed as an oil module-cooler combination, wherein the oil module, the plastic component and the radiator forms the metal component and these components are connected to each other via a hold-down,
• 2 a section through the oil module-cooler combination according to 1 , and
• 3 an enlarged view of the section in the area of the blank holder.

In the figures, the same components are provided with the same reference numerals.

Embodiment (s) of the invention

In the figures is an oil module-cooler combination 1 represented, for example, can be used for the filtration and cooling of transmission or lubricating oil of internal combustion engines in vehicles. The combination 1 includes an oil module 2 , which is designed as a plastic component, and a cooler 3 , which is designed as a metal component. oil module 2 and coolers 3 are about a hold-down 4 connected to each other, which is also designed as a plastic component. The cooler 3 is from the downholder 4 enclosed in the manner of a frame and protrudes through the hold-down 4 therethrough. The hold down 4 has the attachment of the radiator 3 no function, such as the cover of the radiator 3 or the formation of fluid channels. In one piece with the oil module 2 is a mounting plate 5 educated about the the combination 1 for example, can be attached to the engine block of the internal combustion engine. Distributed over the circumference are on the outside of the oil module 2 several screw domes 6 molded, which serve to receive screws for screwing to the engine block.

As the sectional view according to 2 in conjunction with the enlarged view according to 3 to remove, is the cooler 3 directly on the oil module 2 on, leaving a contact area between the oil module 2 and the radiator 3 is formed. In the oil module 2 and in the cooler 3 are channels 7 . 8th introduced, which serve for the flow guidance of oil and cooling water. About the channels 7 and 8th takes place a flow exchange of fluid, ie of oil or cooling water, between the oil module 2 and the radiator 3 , To ensure flow-tightness, are in the oil module 2 groove 9 placed adjacent to the channels 7 lie and the contact area between the oil module 2 and coolers 3 are facing. In the grooves 9 sealing elements can be used, which in the assembled state from the bottom of the overlying radiator 3 be applied, whereby a holding and pressing force on the sealing elements in the grooves 9 acts. In this way it is ensured that the flow connection between the channels 7 and 8th in the oil module 2 or cooler 3 is flow-tight.

At the oil cooler 2 is a circumferential, lateral boundary edge 10 molded, which extends beyond the contact area and a support and welding surface 11 for the hold-down 4 that forms directly on the welding surface 11 rests. Because the oil module 2 and the hold-down 4 are each designed as a plastic component, is a weld in the weld area 11 between oil module 2 and hold down 4 easily possible.

On the radiator 3 is a laterally protruding retaining collar 12 formed, the one-piece with the radiator 3 is executed and on which the hold-down 4 rests. The top of the retaining collar 12 and the top of the bounding edge 10 lie at a height and form a common bearing surface for the hold-down 4 , The hold down 4 lies on the collar 12 and thereby secures the radiator 3 positive fit on the oil module 2 ,

Between the side wall of the radiator 3 and the hold-down 4 there is a gap 13 , The hold down 4 is at a distance to the side wall of the radiator 3 , causing the gap 13 is formed. The reason of the gap 13 is from the retaining collar 12 on the radiator 3 educated. The gap 13 represents a labyrinth seal for fluid passing over the contact area between the oil module 2 and coolers 3 evades laterally and between the boundary edge 10 and the retaining collar 12 flows upwards. Along the welding surface 11 is formed a weld that is flow-tight, leaving only an escape in the direction of the gap 13 it is possible in which leaking fluid can be collected.

The cooler 3 lies with his collar 12 within the boundary edge 10 on the oil module 2 , Accordingly, in the transverse direction - transverse to the holding force between oil module 2 and coolers 3 seen - the cooler 3 positive fit on the oil module 2 added. Another positive connection, seen in the direction of the holding force, exists between the hold-down 4 and the radiator 3 because of the hold down 4 on the collar 12 the radiator 3 rests.

In the hold down 4 is a groove 14 introduced, which adjacent to the support and welding surface 11 located and at the level of the retaining collar 12 is arranged. The groove 14 has a relatively small cross-sectional area and serves to receive fluid, which may be in a fault current between the boundary edge 10 and the retaining collar 12 flows.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 1876406 B1 [0002]

Claims (11)

Plastic component-metal component combination, in particular oil module-cooler combination, with at least one flow path for a fluid between the plastic component (2) and the metal component (3), characterized in that the plastic component (2) and the metal component (3) adjacent to each other are connected, wherein the connection between the plastic component (2) and the metal component (3) by means of a designed as a separate component blank holder (4) made of plastic, which is welded to the plastic component (2) and positively connected to the metal component (3) , wherein the hold-down device (4) for fastening the metal component (3) to the plastic component (2) does not form any fluid channels or encloses a fluid volume. Plastic component-metal component combination according to Claim 1 , characterized in that between the plastic component (2) and the hold-down (4) is formed a circumferential weld. Plastic component-metal component combination according to Claim 1 or 2 , characterized in that in the contact region between the plastic component (2) and the metal component (3), a sealing element is arranged, which is pressed by the holding force between the plastic component (2) and metal component (3). Plastic component-metal component combination according to Claim 3 , characterized in that the sealing element in a groove (9) in the plastic component (2) or in the metal component (3) is inserted and is acted upon by the respective other component on the open groove side. Plastic component-metal component combination according to one of Claims 1 to 4 , characterized in that between the downholder (4) and a side wall of the metal component (3), a gap (13) is formed. Plastic component-metal component combination according to one of Claims 1 to 5 , characterized in that on the metal component (3) a laterally projecting retaining collar (12) is formed, on which the hold-down device (4) rests. Plastic component-metal component combination according to Claim 5 and 6 , characterized in that the bottom of the gap (13) is formed by the laterally projecting retaining collar (12). Plastic component-metal component combination according to one of Claims 1 to 7 , characterized in that on the plastic component (2) a peripheral, increased boundary edge (10) is formed which limits the edge region of the metal component (3). Plastic component-metal component combination according to Claim 8 , characterized in that the hold-down device (4) rests on the boundary edge (10) and is welded to the boundary edge (10). Plastic component-metal component combination according to one of Claims 6 or 7 and 8th or 9 , characterized in that the boundary edge (10) and the retaining collar (12) form a common bearing surface for the hold-down (4). Plastic component-metal component combination according to one of Claims 1 to 10 , characterized in that in the hold-down device (4) has a groove (14) is introduced, on which in the mounted state a retaining collar (12) of the metal component (3) rests.

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