DE1427360C

DE1427360C - Device for bending C-shaped chain links

Info

Publication number: DE1427360C
Application number: DE19601427360
Authority: DE
Inventors: Wilhelm 5000 Köln Wattler
Original assignee: Meyer, Roth & Pastor, 5000 Köln
Priority date: 1960-04-14
Filing date: 1960-04-14
Publication date: 1973-03-01

Description

Die Erfindung wird nachstehend an Hand der Zeichnung erläutert. Es zeigtThe invention is explained below with reference to the drawing. It shows

F i g. 1 eine schematische Darstellung der bekannten Vorrichtung und ihrer wesentlichen Teile in der Stellung vor dem Abschneiden und Biegen des Kettenpinns, F i g. 1 is a schematic representation of the known The device and its essential parts in the position before the cutting and bending of the chain pin,

F i g. 2 die Darstellung nach dem Abschneiden des Kettenpinns und nach dem Vorbiegen in der bekannten Weise,F i g. 2 shows the illustration after the chain pin has been cut off and after the pre-bending in the known one Wise,

F i g. 3 die Darstellung der Vorrichtung gemäß der Erfindung in der der F i g. 2 entsprechenden Stellung.F i g. 3 shows the device according to the invention in that of FIG. 2 corresponding position.

Der Draht, aus welchem die Pinne abgetrennt wer^ den, wird in Richtung des Pfeiles 10 in F i g. 1 durch eine Schneidbuchse 11 zugeführt und durch ein bewegliches Messer 12 abgeschnitten. Hierbei wird der Drahtpinn 13 durch einen Festhalter 15 in der besonders in F i g. 2 gezeigten Weise gegen einen Dorn 14 gedrückt, wobei der Festhalter eine dem Drahtdurchmesser entsprechende Nut 17 aufweist, während der Dorn 14 eine Ringnut hat, deren Innenlinie 16 der endgültigen Innenform des Gliedes entspricht. Um dieses Glied herausnehmen zu können, ist der Dorn in der mittleren Nutebene in zwei auseinander bewegbare Teile unterteilt.The wire from which the tiller was cut the, is in the direction of arrow 10 in F i g. 1 fed through a cutting bush 11 and through a movable one Knife 12 cut off. Here, the wire pin 13 is held by a retainer 15 in the special in Fig. 2 pressed against a mandrel 14, the retainer being one of the wire diameter has corresponding groove 17, while the mandrel 14 has an annular groove, the inner line 16 of the corresponds to the final internal shape of the link. In order to be able to take this link out, the thorn is necessary divided into two parts that can be moved apart in the middle groove level.

Der erste Biegevorgang geschieht gemäß der bekannten Ausführung über zwei Biegestähle 18, die spiegelbildlich zum Festhalter 15 angeordnet sind und an ihren Stirnseiten 20 sowie an ihren Innenseiten 19 dem Drahtdurchmesser entsprechende Nuten 22 bzw. 21 aufweisen, die mit einer Abrundung ineinander übergehen.The first bending process is done according to the known embodiment using two bending steels 18, which Are arranged in a mirror image of the retainer 15 and on their end faces 20 and on their insides 19 have grooves 22 and 21 corresponding to the wire diameter, which are rounded into one another pass over.

Beim Biegevorgang greifen die Biegestähle 18 zunächst über den Übergangspunkt 23 und den Dornpunkt 24 mit dem Hebelarm 25 am Pinn an und verbiegen diesen. Hierbei greift die Abrundung der Nuten 21, 22, die bei der bekannten Ausführung einen nur geringen Durchmesser aufweist, am Punkt 26 des Pinns an und gleitet gemäß F i g. 2 bis zum Punkt 27. Ein weiteres Vorschieben der Biegestähle 18 ist bei der bekannten Ausführung nicht möglich.During the bending process, the bending steels 18 initially grip via the transition point 23 and the mandrel point 24 with the lever arm 25 on the pin and bend it. The rounding of the grooves takes effect here 21, 22, which in the known embodiment has only a small diameter, at point 26 of the Pins and slides according to FIG. 2 to point 27. Another advance of the bending steels 18 is at the known version is not possible.

Die Seitenstähle 28 weisen an ihren Stirnflächen 29 und an ihren oberen Seitenflächen 30 dem Drahtdurchmesser entsprechende Nuten 31 und 32 auf. Die Übernahme der Bearbeitung des von den Biegestählen 18 vorgebogenen Pinns durch die Seitenstähle 28 erfolgt bei der bekannten Ausführung in einer Stellung, in der die Pinnenden 33 über die Stirnkanten 20 der Biegestähle 18 vorstehen^ wie dies F i g. 2 darstellt, wobei wegen der vorbeschriebenen Führung der Biegestähle 18 diese Pinnenden zueinander nicht parallel liegen, sondern unter einem verhältnismäßig großen Winkel zueinander stehen. Aus diesem Grund werden die Pinnenden von den Seitenstählen 28 beim Vorschieben dieser Stähle gegeneinander in Richtung der Pfeile 34, 35 an den Punkten 36 ihrer Stirnflächenkanten ergriffen, so daß sie dort starken Beanspruchungen ausgesetzt sind. Diese führen zu Beschädigungen an den Stirnflächen der Pinnenden, wodurch Schwierigkeiten beim Verschweißen entstehen.The side bars 28 have the wire diameter on their end faces 29 and on their upper side faces 30 corresponding grooves 31 and 32. Taking over the machining of the bending steels 18 pre-bent pins through the side bars 28 take place in the known embodiment in a position in which the pin ends 33 over the front edges 20 of the bending steels 18 protrude ^ as this F i g. 2 represents because of the above-described guidance of the bending steels 18, these pin ends are not relative to one another lie parallel, but are at a relatively large angle to each other. For this reason the pin ends of the side steels 28 when these steels are pushed towards one another in the direction the arrows 34, 35 gripped at the points 36 of their end face edges, so that they are subjected to heavy loads there are exposed. These lead to damage to the end faces of the pin ends, which Difficulties in welding arise.

Um diese Nachteile zu vermeiden, werden gemäß der Erfindung die Biegestähle 18 in den Bereich der Seitenstähle 28 vorbewegt — wie dies F i g. 3 erkennen läßt — und aus diesem Bereich vor Bewegungsbeginn der Seitenbiegestähle 28 herausbewegt. Hierdurch wird erreicht, daß die Pinnenden 33 gemäß Fig. 3 parallel zueinander vorgebogen werden können und die Beschädigungen an den Punkten 36 gemäß F i g. 2 in Fortfall kommen, weil die Seitenstähle 28 mit ihren Nutteilen 31 auf breiter Fläche an den Pinnenden angreifen. Bei der erfindungsgemäßen Ausführung werden also die Beschädigungen an den Pinnenden vermieden, die Stirnflächen der Pirinenden bleiben unversehrt, ein übermäßiges Stauchen ist nicht mehr erforderlich, und es bildet sich beim Verschweißen eine über ihren Umfang gleichmäßige und geringfügige Wulst.In order to avoid these disadvantages, according to the invention, the bending steels 18 are in the range of Side bars 28 moved forward - as shown in FIG. 3 shows - and the side bending bars 28 are moved out of this area before the start of movement. Through this it is achieved that the pin ends 33 according to FIG. 3 can be pre-bent parallel to one another and the damage at points 36 according to FIG. 2 in elimination because the side steels 28 attack the pin ends with their groove parts 31 over a wide area. In the inventive Execution thus avoiding damage to the pin ends, the end faces of the pin ends remain intact, excessive upsetting is no longer necessary, and it forms during welding a slight bead that is uniform over its circumference.

Bei der erfindungsgemäßen Ausführung kann das Messer 12 in Richtung des strichpunktierten Pfeiles 37 in F i g. 3 gegenüber dem benachbarten Biegestahl 18 vorzeitig, gegebenenfalls unmittelbar nach vollfüjirtem Schnitt, zurückgezogen werden, so daß dann die Seitenstähle 28 bereits bis an den Bereich der Biegestähle 18 in deren vorgeschobener Stellung herangeführt werden könnend Die Rückbewegung der Biegestähle 18 nach dem Verlassen des Bewegungsbereiches der Seitenbiegestähle 28 kann bis zum Stillstand im Bereich des Biegedorns 14 verlangsamt werden.In the embodiment according to the invention, the knife 12 can move in the direction of the dash-dotted arrow 37 in FIG. 3 prematurely with respect to the adjacent bending steel 18, possibly immediately after it has been fully assembled Cut, are withdrawn so that the side bars 28 are then already up to the area of the bending bars 18 can be brought up in their advanced position. The return movement of the bending steels 18 after leaving the range of motion of the side bending bars 28 can come to a standstill be slowed down in the area of the bending mandrel 14.

Die Biegestähle 18 sind an den Enden ihrer Außenflächen durch eine kurvenartige Ausbildung 38 verjüngt, während die Seitenbiegestähle 28 an den Enden ihrer Außenflächen in entsprechender Weise durch eine kurvenartige Ausbildung 39 verjüngt sind.The bending steels 18 are provided with a curve-like formation 38 at the ends of their outer surfaces tapered, while the side bending bars 28 at the ends of their outer surfaces in a corresponding manner are tapered by a curve-like formation 39.

Zur Verminderung der Reibung zwischen den Biegestählen 18 und den Pinnenden können die Biegestähle 18 jeweils an der Übergangsstelle zwischen der Nut an ihrer Innenseite und der Nut an ihrer Stirnseite eine drehbare, an ihrem Umfang mit einer Nut versehene Rolle aufweisen.To reduce the friction between the bending steels 18 and the pin ends, the bending steels 18 each at the transition point between the groove on its inside and the groove on its face have a rotatable roller provided with a groove on its periphery.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims

Claims: stopped this area. Accordingly, the bending steels only touch the pin ends for a fraction of their length. This has the consequence that the pin ends are not parallel, but V-shaped to one another. The side bending steels therefore hit the edges of the end faces of the pin ends and damage them. This disadvantage becomes more noticeable the more the pin ends spring apart again after the final bending, so that then

1. Device for bending C-shaped, at
the ends of weldable chain links
Wire that can be fed through a cutting bush
is, with a cutting knife for the chain pin,
with one bending mandrel, with two parallel to each other, perpendicular to the pin and tangential to the mandrel
movable, the end faces do not run parallel to one another on the end faces and the insides, but also have V-shaped grooves to receive the chain pin. Here bending steels and with two against each other, the damaged areas of the pin ends are broom perpendicular to the direction of movement of the bending steels, so far apart, so that a perpendicular and tangential to the mandrel movable side bend-correct welding filling these steels, characterized in that 15 rounded V on the outside - Gaps are only possible by using bending bars (18) up to the range of motion ßiges upsetting. The consequences are, on the one hand, the side bending steels (28) can be advanced and an excessive bead formation on the inside of the steels (28) can be moved out before the start of movement of the side bending weld point, on the other hand, tensions in the link. through which the mechanical properties of the

2. Apparatus according to claim 1, thereby affecting the limb.

indicates that the return movement of the bending- Now another known device makes it

(German patent specification 254 952) possible, a one-piece molding tool corresponding to the bending steels to continue to act against the legs of the pin beyond the pre-curvature of the pin, however, this is only possible over a short distance,

steels (18) after leaving the range of motion of the side bending steels (28) to a standstill can be slowed down in the area of the bending mandrel (14).

3. Apparatus according to claim 1 or 2, characterized in that independently of the neighboring Bending steel (18) the knife (12) from the range of motion of the side bending steel (28) is retractable.

4. Device according to one of claims 1 to 3, characterized in that the bending steels (18) are tapered at the ends of their outer surfaces by a curved formation (38).

In addition, the side bending steels have an angular position deviating from the aligned position to one another take in. This makes the movement arrangement for these steels more cumbersome. Also can the side bending steels are no longer guided to the ends of the pins, but are in their final position in the Distance from each other. The damage to the pin ends is somewhat reduced,

5. Device according to one of claims 1 to 35, the V-shaped jumping apart of the pin ends 4, characterized in that the bending steels in the finished bent member is reinforced. The (18) at the transition point between the
Groove (22) on the face and the groove (21) on the

Inside a rotatable, on the circumference with a

The invention is therefore not based on this known device, but rather on the initially described, in which the side steels

Have grooved role. 40 perpendicular to the direction of movement of the bending steels

6. Device according to one of claims 1 to and arranged tangentially to the mandrel and movable

5, characterized in that the side bending "are.

steels (28) tapered at the ends of their outer surfaces by a curve-like formation (39) are.

Based on a device for bending C-shaped chain links that can be welded at the ends made of wire, according to the type mentioned at the beginning, the invention is based on the object To create a bending device that prevents damage to the ends of the chain pin when bending be avoided.

According to the invention, this object is achieved in that the bending steels extend into the range of motion the side bending bars can be advanced and moved out of this before the side bending bars begin to move are.

The embodiment according to the invention ensures that the pin ends are pre-bent parallel to one another can be and that consequently the side bending steels for final bending on a wide area attack the pin end. In addition to the wide

The invention relates to a device
for bending C-shaped chain links made of wire, which can be welded at the ends
a cutting bush can be fed in, with a cutting knife for the chain pin, with a bending mandrel, with 55
two parallel to each other, perpendicular to the pin and
tangential to the mandrel movable on the front sides
and the insides of grooves for receiving the chain pin having bending steels and with two opposing, perpendicular to the direction of movement of the bending tools, bending steels and tangential to the mandrel movable damage to the pin ends are avoided, the Sciten bending steels. The end faces of the pin ends remain intact. The

The known devices of this type have caused excessive compression in verbs the disadvantage that the bending steels before the self-welding is no longer required and that tenststee undertake the further bending process of the chain pin 65 in a uniform and slight manner over its circumference, only a short feed movement forms the right bead.

to lead. The bending steels do not get into the further features within the scope of the invention

Boreich the side steels, but are characterized shortly before in the subclaims.