DE102016124156B4 - Method for producing a hinge connection - Google Patents

Abstract

A method for producing a joint connection, wherein the articulated joint after its preparation consists of two mutually pivotable joint parts (1, 2) and both joint parts (1, 2) are produced by casting, characterized in that the joint parts (1, 2) during casting through a removable after casting by destruction removable insert (3) are separated from each other.

Description

The invention relates to a method for producing a joint according to the preamble of patent claim 1.

A method for producing a hinge connection of the aforementioned type is known from the patent document DE 39 01 899 A1 known. In this method, the joint connection consists of two mutually pivotable joint parts after their production, both joint parts are produced by casting. In this solution, however, it is necessary that one joint part is completely cooled before the other can be poured.

The invention is based on the object to improve a method for producing a hinge connection of the type mentioned, in particular to shorten the time.

This object is achieved with a method for producing a hinge connection by the features listed in the characterizing part of patent claim 1.

According to the invention, it is thus provided that the joint parts are separated during casting by a removable after casting by destruction insert.

In other words, therefore, a so-called core is used to ensure a sufficient separation of the joint parts during casting.

Other advantageous developments of the method according to the invention will become apparent from the dependent claims.

The sake of completeness is still on the two documents DE 20 33 369 C3 and DE 21 43 882 C pointed.

The inventive method for producing a hinge connection including its advantageous developments according to the dependent claims will be explained in more detail with reference to the drawing of a preferred embodiment.

• 1 perspektivisch den Unterkasten zum Gießen der Gelenkverbindung mit zwei eingelegten Einlegeteilen;
• 2 zur Verständniserleichterung eine Ausschnittsvergrößerung des in 1 markierten Bereichs;
• 3 perspektivisch die Gelenkverbindung nach dem Gießen und nach Entfernung der Einlegeteile in einer ersten Position; und
• 4 in Vorderansicht die Gelenkverbindung gemäß 3 in einer zweiten (End-) Position, bei der die Gelenkteile zueinander verschoben worden sind.

It shows

• 1 in perspective, the lower box for casting the hinge connection with two inserted inserts;
• 2 to facilitate understanding, a detail enlargement of the in 1 marked area;
• 3 in perspective, the hinge joint after casting and after removal of the inserts in a first position; and
• 4 in front view the articulation according to 3 in a second (end) position, in which the joint parts have been shifted from each other.

In the embodiment shown in the figures, the two joint parts, as can be seen, are connected to each other in duplicate, d. H. The following explanations on the insert etc. are always to be understood as "double".

As already known, the articulated connection, after its manufacture, consists of two pivotable joint parts 1 . 2 , which are preferably produced by sand casting, preferably with upper and lower box.

Essential for the method according to the invention or the joint connection produced by this method is now that the joint parts 1 . 2 when casting by a removable after casting by destruction removable insert 3 be separated from each other.

For this purpose, preferably in the manufacture of a mold for the joint parts 1 . 2 a free space for the insert 3 leave.

The insert 3 itself is particularly preferably formed from molding sand.

In addition, preferably, the insert part 3 after casting, optionally by movement of the two joint parts 1 . 2 destroyed against each other and / or by shaking the joint connection.

Furthermore, it is particularly preferably provided that the joint parts 1, 2 are captively connected to each other after casting.

In addition, it is preferably provided that the insert 3 on different sides of its surface on the one hand with the one hinge part 1 and on the other hand with the other joint part 2 is poured over.

Considered in more detail, is particularly preferred, as shown, provided that on the one hand a coat 3.1 on an annular insert 3 with the one hinge part 1 poured around and on the other hand, a through hole 3.2 on the annular insert 3 is poured out.

Furthermore, it is preferably provided that with the annular insert part 3 during casting on the one hinge part 1 a joint opening 1.1 and / or a part of a provided on the other joint part 2, elongated pin 2.1 is produced. In this case, the first diameter having joint opening 1.1 after destruction of the insert 3 on and there to a position at a second, the first suitable diameter having pins 2.1 be moved, ie it is provided according to the invention that the joint parts 1 . 2 after casting are mutually displaceable.

Finally, it is particularly preferably provided that on the hinge part 2 opposite end of the pin 2.1 when casting a larger diameter than the joint opening 1.1 having, preferably mushroom-shaped, stop 2.2 is poured.

The method according to the invention works as follows:

First, both the top box and the bottom box (in 1 only the lower box is shown schematically), for example, with the help of a permanent model of the two joint parts 1, 2 and the insert 3 prepared, ie in the molding sand, an impression of this, corresponding cast bevels having permanent model is generated.

In the next step, after removal of the permanent model from the molding sand, the insert also consisting of molding sand is positioned at the corresponding point (s), namely exactly at the point where the joint parts are located 1 . 2 Although come close, but should not touch when pouring to avoid a material connection. Because the insert part 3 is arranged in the cutting plane between the two boxes, it is used only once per joint.

After assembly of the boxes and other known preparatory measures, the mold is filled with casting material.

After cooling, the boxes are apart and at this time still with the insert 3 provided articulated joint removed from the boxes.

By shaking, knocking or the like is made of molding sand insert 3 destroyed, so that in 3 situation shown results.

The pin 2.1 In this case, it has different diameters along its extension and ends in the mushroom-shaped stop 2.2, by which it is prevented that the joint parts 1, 2 can separate from one another. In the situation in 3 is the diameter of the joint opening 1.1 significantly larger than the diameter of the pin 2.1 enclosed at this point, this part of the pin 2.1 through the interior of the insert 3 was formed.

But now become the two joint parts 1 . 2 shifted to each other, so can the joint opening 1.1 with the larger diameter part of the pin 2.1 be brought into operative connection, so that a comparatively little game exhibiting hinge arises, wherein it is particularly preferably provided that when using two pins 2.1 whose longitudinal axes are aligned with each other.

LIST OF REFERENCE NUMBERS

1

joint part

1.1

joint opening

2

joint part

2.1

spigot

2.2

attack

3

insert

3.1

coat

3.2

Through opening

Claims (8)

A method for producing a joint connection, wherein the joint connection after its preparation consists of two mutually pivotable joint parts (1, 2) and both joint parts (1, 2) are produced by casting, characterized in that the joint parts (1, 2) during casting through a removable after casting by destruction removable insert (3) are separated from each other. Method according to Claim 1 , characterized in that the insert part (3) is cast on different sides of its surface on the one hand with casting material for forming the one joint part (1) and on the other hand with casting material for forming the other joint part (2). Method according to Claim 1 or 2 , characterized in that on the one hand a jacket (3.1) on an annular insert (3) with cast material for forming the one hinge part (1) encapsulated and on the other hand, a through hole (3.2) on the annular insert (3) is poured. Method according to Claim 3 , characterized in that with the annular insert part (3) during casting on the one hinge part (1), a hinge opening (1.1) is generated. Method according to Claim 3 or 4 , characterized in that with the annular insert part (3) during casting a part of an elongated pin (2.1) is generated, which is connected to the other joint part (2). Method according to Claim 4 and 5 , characterized in that the first diameter having hinge opening (1.1) after destruction of the insert (3) on the pin (2.1) is displaced, up to a position at which the pin (2.1) has a second, matching the first Diameter. Method according to Claim 6 , characterized in that on the hinge part (2) facing away from the end of the pin (2.1) during casting a larger diameter than the joint opening (1.1) exhibiting stop (2.2) is cast. Method according to one of Claims 1 to 7 , characterized in that the insert part (3) is formed from molding sand.

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