EP3819041A1 - Casting method for manufacturing a motor vehicle component - Google Patents

Abstract

The invention relates to a casting method for producing a motor vehicle component, comprising providing a first mold (1), the first mold (1) having a wall (10) with at least one fastening recess (2), the at least one fastening recess (2) having an additional recess (3), providing a second mold (4), the second mold (4) having at least one fastening projection (5), preferably between the first mold (1) and the second mold (4). receiving space (6) is formed for receiving a cast material, and bringing the at least one fastening recess (2) and the at least one fastening projection (5) into engagement, and gluing the at least one fastening recess (2) and the at least one fastening projection (5) by means of an adhesive material (7), so that adhesive material (7) is pressed into the recess (3) and preferably avoids that adhesive material (7) through the at least one fastening projection (5) from the at least one fastening recess (2) into the receiving space (6) and/or onto an inner surface (8) of the wall (10).

Description

The invention relates to a casting method for producing a motor vehicle component. The motor vehicle component is preferably an exhaust manifold or a cylinder head.

Figure 4 shows a device for explaining a casting method known from practice for producing a cylinder head. A first mold 1 'and a second mold 2' are fastened to one another by means of fastening depressions 2 'and fastening projections 5' and glued to one another by means of an adhesive material 7 ', the first mold 1' and the second mold 2 'providing a receiving space 6' Recording of cast material is formed. The problem can arise here that, due to the fact that the metering accuracy of the adhesive material 7 'cannot always be guaranteed, excess adhesive material X' is pressed out of the fastening depressions 2 'by the fastening projections 5' and reaches the receiving space 6 'and / or onto an inner surface 8' of a wall 10 'of the first form 1', which can result in defects on the cylinder head.

It is an object of the invention to create an alternative and / or improved casting method for producing a motor vehicle component, in particular without defects on the motor vehicle component caused by excess adhesive material.

This object can be achieved with the features of the independent claim. Advantageous developments of the invention are disclosed in the dependent claims and the following description.

The invention relates to a casting method for producing a motor vehicle component, e.g. B. an exhaust manifold or a cylinder head.

• ein Bereitstellen einer ersten Form (vorzugsweise Gussform, insbesondere zur Ausbildung des Kraftfahrzeugbauteils), wobei die erste Form eine Wand mit zumindest einer Befestigungsvertiefung aufweist, wobei die zumindest eine Befestigungsvertiefung mit einer zusätzlichen Aussparung (z. B. Vertiefung oder Hohlraum etc.) versehen ist,
• ein Bereitstellen einer zweiten Form (vorzugsweise Gussform, insbesondere zur Ausbildung des Kraftfahrzeugbauteils), wobei die zweite Form zumindest einen Befestigungsvorsprung aufweist, wobei vorzugsweise zwischen der ersten Form und der zweiten Form z. B. ein Aufnahmeraum zur Aufnahme eines Gussmaterials zweckmäßig für das Kraftfahrzeugbauteil gebildet wird, und
• ein in Eingriff bringen der zumindest einen Befestigungsvertiefung und des zumindest einen Befestigungsvorsprungs sowie ein Verkleben der zumindest einen Befestigungsvertiefung und des zumindest einen Befestigungsvorsprungs mittels eines (vorzugsweise zuvor in die zumindest eine Befestigungsvertiefung eingebrachten) Klebematerials, z. B. vorteilhafterweise so, dass (insbesondere überschüssiges) Klebematerial in die Aussparung gedrückt wird und z. B. in der Wand verbleiben kann.

The casting process includes:

• providing a first mold (preferably a casting mold, in particular for forming the motor vehicle component), the first mold having a wall with at least one fastening recess, the at least one fastening recess being provided with an additional recess (e.g. recess or cavity, etc.) ,
• providing a second mold (preferably casting mold, in particular for forming the motor vehicle component), wherein the second mold has at least one fastening projection, preferably between the first mold and the second mold, for. B. a receiving space for receiving a casting material is expediently formed for the motor vehicle component, and
• bringing the at least one fastening recess and the at least one fastening projection into engagement and gluing the at least one fastening recess and the at least one fastening projection by means of an adhesive material (preferably previously introduced into the at least one fastening recess), e.g. B. advantageously so that (especially excess) adhesive material is pressed into the recess and z. B. can remain in the wall.

This allows z. For example, it can be avoided that (in particular excess) adhesive material is conveyed (e.g. pressed) through the at least one fastening projection from the at least one fastening recess into the receiving space and / or is conveyed (e.g. pressed) onto an inner surface of the wall .

This advantageously makes it possible to avoid imperfections on the motor vehicle component which can be caused by excess adhesive material emerging from the at least one fastening recess.

An exit (e.g. scrap or outflow, etc.) of in particular excess adhesive material into the receiving space can thus advantageously be avoided.

The at least one fastening recess can preferably be incorporated essentially orthogonally into the first shape, in particular the wall, wherein alternatively or additionally the at least one fastening projection can protrude essentially orthogonally from the second shape.

The combination mounting recess-mounting projection can also, for. B. be referred to as a glue nail connection.

It is possible for the recess to be formed in an end face of the at least one fastening recess.

The recess can, for. B. be designed as a through hole in the wall and / or completely penetrate the wall. Alternatively or in addition, the recess can be designed as a blind hole in the wall.

The at least one fastening recess and / or the at least one fastening projection can, for. B. be substantially cylindrical, circular, rectangular or triangular.

It is possible that the at least one fastening recess is formed and / or enlarged by a projection (for example protruding from the wall and / or essentially cylindrical, circular, rectangular or triangular).

It is possible for the second shape to be spaced apart from the first shape by means of the at least one fastening projection, preferably in order to form the receiving space. The at least one fastening projection can thus, for. B. serve as a spacer.

The first shape and / or the second shape can e.g. B. be trough-shaped (in particular cup-shaped).

It is possible that the wall forms a bottom section in particular of the first shape and z. B. may have an expedient circumferential flange portion.

The at least one fastening recess is preferably formed in the base section.

The first shape is preferably a floor mold.

The second form can e.g. B. be inserted from above into the first form.

The casting material can, for. B. be introduced into the first form from above or below.

It is possible for the adhesive material to be filled (for example, introduced) into the at least one fastening recess before the at least one fastening projection is inserted into the at least one fastening recess.

It is possible for the at least one fastening recess and the at least one fastening projection to be glued to one another at the end and / or in their circumferential direction.

It is possible for (in particular excess) adhesive material to be pressed into the recess through the at least one fastening projection.

The at least one fastening recess and the at least one fastening projection can, for. B. are brought into engagement with one another essentially precisely and / or essentially without play in their circumferential direction.

The motor vehicle component may preferably comprise an exhaust manifold or a cylinder head, e.g. B. a two-cylinder, four-cylinder, six-cylinder, or eight-cylinder head.

It should also be mentioned that a plurality of fastening depressions are preferably provided, each of which can have an additional recess. A plurality of fastening projections can also expediently be provided.

FIG. 1

eine schematisierte Schnittdarstellung einer beispielhaften Vorrichtung zur Erläuterung eines Gussverfahrens gemäß einer Ausführungsform der Erfindung;

FIG. 2

eine schematisierte Ansicht von oben auf die Vorrichtung der Figur 1;

FIG. 3

eine Illustration eines Gussverfahrens gemäß einer Ausführungsform der Erfindung; und

FIG. 4

eine schematisierte Schnittdarstellung einer Vorrichtung zur Erläuterung eines Gussverfahrens gemäß Stand der Technik.

The preferred embodiments and features of the invention described above can expediently be combined with one another. Further details and advantages of the invention are described below with reference to the accompanying figures:

FIG. 1

a schematic sectional view of an exemplary device for explaining a casting method according to an embodiment of the invention;

FIG. 2

a schematic view from above of the device of Figure 1 ;

FIG. 3

an illustration of a casting method according to an embodiment of the invention; and

FIG. 4th

a schematic sectional view of a device for explaining a casting method according to the prior art.

Figure 1 shows a schematic sectional view of an exemplary device for explaining a casting method for producing a motor vehicle component, e.g. B. an exhaust manifold or a cylinder head, wherein Figure 2 a schematic view from above of the device of Figure 1 shows.

A first mold 1 (in particular a casting mold) and a second mold 4 (in particular a casting mold) are used to form, in particular to shape, the motor vehicle component.

The first mold 1, expediently designed as a bottom casting mold, has, for example, three fastening depressions 2, the second mold 4 having three fastening projections 5.

The fastening recesses 2 are formed in a wall 10 having an inner surface 8.

The fastening projections 5 are brought into engagement with the fastening recesses 2, so that the first mold 1 and the second mold 4 are preferably kept at a distance by means of the fastening projections 5 in order to form a receiving space 6 for receiving a casting material for the motor vehicle component.

Adhesive material 7 is introduced into the fastening depressions 2 in order to glue the fastening depressions 2 and the fastening projections 5 to one another.

A special feature is that the fastening depressions 2 each have a recess 3 on their end face, so that in particular any excess adhesive material 7 can be pressed out of the fastening depressions 2 into the recesses 3 by means of the fastening projections 5.

This can expediently prevent excess adhesive material 7 from being conveyed through the fastening projections 5 from the fastening depressions 2 into the receiving space 6 and / or onto the inner surface 8 of the wall 10, which can lead to defects in the motor vehicle to be produced.

At least one recess 3 can, for. B. be designed as a through hole in the wall 10 and in particular completely penetrate the wall 10. At least one recess 3 can, for. B. be designed as a blind hole in the wall 10. It is possible for one or more fastening depressions 2 to be formed and / or enlarged by a projection 9 protruding from the wall 10. The fastening recesses 2, the fastening projections 5 and the projection 9 can, for. B. be substantially cylindrical, circular, rectangular or triangular.

The first form 1 can, for. B. be trough-shaped, wherein the wall 10 can expediently form a lower floor section with a circumferential flange section 11.

The FIG. 3 illustrates a casting method for producing a motor vehicle component according to an embodiment of the invention.

A step S1 comprises providing a first mold 1 for forming the motor vehicle component, the first mold 1 preferably having a plurality of fastening depressions 2. The fastening depressions 2 are each provided with an additional recess 3.

A step S2 comprises providing a second mold 4 for forming the motor vehicle component. The second mold 4 preferably comprises a plurality of fastening projections 5. The first mold 1 and the second mold 4 form a receiving space 6 for receiving a casting material.

A step S3 comprises bringing the fastening projections 5 and the fastening depressions 2 into engagement as well as gluing the fastening projections 5 and the fastening depressions 2 by means of an adhesive material 7 expediently previously introduced into the fastening depressions 2, so that in particular excess adhesive material 7 is pressed into the respective recess 3 .

This can in particular prevent excess adhesive material 7 from being conveyed through the fastening projections 5 from the fastening depressions 2 into the receiving space 6 and / or onto the inner surface 8.

A step S4 can include supplying casting material in order to produce the motor vehicle component.

The invention is not restricted to the preferred embodiments described above. Rather, a large number of variants and modifications are possible which also make use of the inventive concept and therefore fall within the scope of protection. In addition, the invention also claims protection for the subject matter and the features of the subclaims regardless of the features and claims referred to.

List of reference symbols

1

first form, preferably casting mold

2

Fastening recess, preferably fastening depressions

3

Recess, preferably recesses

4th

second form, preferably casting mold

5

Fastening projection, preferably fastening projections

6th

Recording room

7th

Adhesive material

8th

Inner surface

9

head Start

10

Base section

11

Flange section

X '

excess adhesive on inner surface 8 '

Claims (15)

A casting method for producing a motor vehicle component, comprising: - Provision of a first mold (1), the first mold (1) having a wall (10) with at least one fastening recess (2), the at least one fastening recess (2) being provided with an additional recess (3), - Provision of a second mold (4), the second mold (4) having at least one fastening projection (5), a receiving space (6) for receiving a casting material preferably being formed between the first mold (1) and the second mold (4) will, and - bringing the at least one fastening recess (2) and the at least one fastening projection (5) into engagement, and gluing the at least one fastening recess (2) and the at least one fastening projection (5) by means of an adhesive material (7), so that adhesive material (7) is pressed into the recess (3) and preferably it is avoided that adhesive material (7) through the at least one fastening projection (5) from the at least one fastening recess (2) into the receiving space (6) and / or onto an inner surface (8) of the Wall (10) is conveyed. Casting method according to claim 1, wherein the recess (3) is formed in an end face of the at least one fastening recess (2). Casting method according to claim 1 or 2, wherein the recess (3) - Is designed as a through hole and / or completely penetrates the wall (10), or - Is designed as a blind hole in the wall (10). Casting method according to one of the preceding claims, wherein at least one fastening recess (2) and / or at least one fastening projection (5) is cylindrical, circular, rectangular or triangular. Casting method according to one of the preceding claims, wherein the at least one fastening recess (2) is formed and / or enlarged by a projection (9) preferably protruding from the wall (10). Casting method according to one of the preceding claims, wherein the second mold (4) is spaced apart from the first mold (1) by means of the at least one fastening projection (5), preferably such that the at least one fastening projection (5) serves as a spacer. Casting method according to one of the preceding claims, wherein the first mold (1) is trough-shaped and / or the wall (10) forms an in particular lower floor section with a circumferential flange section (11). Casting method according to one of the preceding claims, wherein the first mold (1) represents a bottom mold and preferably the second mold (4) is inserted into the first mold (1) from above. Casting method according to one of the preceding claims, wherein the casting material is introduced into the first mold (1) from above or from below. Casting method according to one of the preceding claims, wherein the adhesive material (7) is filled into the at least one fastening recess (2) before the at least one fastening projection (5) is inserted into the at least one fastening recess (2). Casting method according to one of the preceding claims, wherein the at least one fastening recess (2) and the at least one fastening projection (5) are glued to one another at the end and / or in their circumferential direction. Casting method according to one of the preceding claims, wherein the adhesive material (7) is pressed into the recess (3) by the at least one fastening projection (5). Casting method according to one of the preceding claims, wherein the at least one fastening recess (2) and the at least one fastening projection (5) are brought into engagement with one another with an accurate fit and / or in particular in their circumferential direction without play. Casting method according to one of the preceding claims, wherein the motor vehicle component comprises an exhaust manifold or a cylinder head. The casting method of claim 14, wherein the cylinder head is a two-cylinder, four-cylinder, six-cylinder, or eight-cylinder head.

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