EP1355748B1 - Drawing machine - Google Patents

Abstract

A drawing machine includes a drawing die and a continuously working drawing device, the drawing device comprising only one closed drawing member that is guided around axis-parallel wheels and is driven in a controlled manner via at least one of the wheels. The drawing member is linked with clamping devices carrying clamping chucks that are controlled and moved towards one another and apart from another to grip a wire, tube or profile to be drawn. In an embodiment, the clamping chucks are retained by retainer elements that extend through a drawing element linked with the clamping device.

Description

The invention relates to a drawing machine with a drawing die and a continuously working Pulling device according to the preamble of claim 1 (see e.g. US-A-1 911 157)

Such drawing machines with which the wire is continuously drawn are already known can be. For this purpose, the wire is closed between the lower run of an upper, encircling chain and the upper run of a lower closed, encircling Chain clamped and pulled. These known drawing machines require a considerable amount constructive effort. They are also highly subject to wear, because a force is applied to the chains transversely to their running direction for clamping the wire. This type of clamping also leads to considerable, stressful noise.

The object of the present invention is now to overcome the disadvantages of these known Avoid drawing machines and a reliable pull for wire, pipes and / or profiles sure.

This object is achieved with a drawing machine solved according to claim 1.

Advantageous further developments of this drawing machine result from the subclaims.

With reference to drawings, some embodiments of the drawing machine according to the invention described.

Fig. 1

Eine Seitenansicht einer Ausführungsform, bei der das Zugorgan als Kette ausgebildet ist,

Fig. 2

eine Draufsicht der Ausführungsform nach Fig. 1,

Fig. 3

ein Detail betreffend die Verstellung von Keilelementen zur Erhöhung der Klemmkraft nach der Linie ab A-A in Fig. 1

Fig. 4

einen Horizontalschnitt durch die Darstellung nach Fig. 3 nach der Linie B-B in Fig.1,

Fig. 5

einen Schnitt nach der Linie C-C in Fig. 1 bei geschlossenen Klemmbacken,

Fig. 6

eine der Fig. 5 entsprechende Darstellung bei geöffneten Klemmbacken,

Fig. 7

einen Axialschnitt durch die antreibenden Räder und die Klemmvorrichtungen,

Fig.8

eine Ausführungsform betreffend die Steuerung der Klemmvorrichtungen mittels Steuerkurve und Rückholung durch Federn,

Fig. 9

eine weitere Ausführungsform betreffend die Steuerung der Klemmvorrichtungen durch Steuerkurven und Rückholung ebenfalls durch Steuerkurve,

Fig. 10

eine der Figur 8 ähnliche Darstellung mit Keilelementen zur Erhöhung der Klemmung,

Fig. 11

einen Schnitt betreffend die Drahtzuführung mit Ziehmatrize,

Fig. 12

eine der Figur 1 ähnliche Darstellung mit Vorrichtung zum Drahteinzug und

Fig. 13

eine Ziehmaschine bei geöffneten Klemmbacken und passierender Greifzange.

It shows:

Fig. 1

A side view of an embodiment in which the traction element is designed as a chain,

Fig. 2

2 shows a top view of the embodiment according to FIG. 1,

Fig. 3

a detail regarding the adjustment of wedge elements to increase the clamping force along the line from AA in Fig. 1st

Fig. 4

3 according to the line BB in FIG. 1,

Fig. 5

2 shows a section along the line CC in FIG. 1 with the jaws closed,

Fig. 6

5 corresponding representation with open jaws,

Fig. 7

an axial section through the driving wheels and the clamping devices,

Figure 8

an embodiment relating to the control of the clamping devices by means of a cam and return by springs,

Fig. 9

a further embodiment relating to the control of the clamping devices by control cams and return also by control cams,

Fig. 10

8 shows a representation similar to FIG. 8 with wedge elements to increase the clamping,

Fig. 11

a section regarding the wire feed with drawing die,

Fig. 12

a representation similar to Figure 1 with device for wire feeding and

Fig. 13

a drawing machine with the jaws open and a passing gripper.

The embodiments of the drawing machine according to the invention shown in the drawings each have two chain-like tension elements 3, each with two wheels 4 run, one of which is driven. The driven wheels 4 sit as well like the two non-driven wheels 4 each on a common shaft 12. Die chain-like tension elements 3 are each connected to a plurality of clamping devices 6. Two clamping devices 6 belonging to different tension elements 3 act together to grasp a wire 7 with their jaws 5. The clamping devices 6 have rollers 13, which are due to the movement of the associated tension element 3 Control curves 8 are performed. The jaw 5 of each clamping device 6 is over two holding rods 11 held by the associated chain-like tension element 3 are passed through. The holding rods 11 on the one hand cause the clamping devices are driven via the associated tension element 3. On the other hand, you can interacting clamping jaws 5 are moved towards one another via the holding rods 11, without the respective tension element 3 being transverse to the direction of travel of the tension element 3 directed force works. That is, the movement of the jaws 5 towards each other or away from each other is decoupled from the tension elements 3, whereby the tension elements 3 one have less wear.

The control cams 8 are designed in such a way that the clamping devices 6 are in the initial area of the upper strand, the wire 7 can be moved towards one another and towards the end this strand the wire 7 are released to move away from each other.

On the one hand, to increase the clamping effect, they act on the position of the control cams Wedge elements 9a (see FIGS. 3 and 13) or in. The individual clamping devices 6 arranged jaw wedge elements 9b (see Figure 10) provided. Both with the Wedge elements 9a according to FIG. 13 or FIG. 3 as well as with the wedge elements 9b according to FIG 10 there is a relative movement when the wire 7 is detected.

Claims (5)

1. The drawing machine with a draw die (1) and a continuously working drawing device, whereby
   the drawing device exhibits only one closed drawing organ, the drawing organ is formed from two parallel-running drawing elements (3),
   these drawing elements (3) are guided about axis-parallel wheels (4) and are driven by at least one of the wheels (4) in a controlled manner,
   the drawing elements (3) are connected to clamping devices (6) carrying clamping chucks (5),
   in each case, one of the clamping chucks (5) connected to the first drawing element (3) interacts with one of the clamping chucks (5) allocated to the second drawing element (3), and
   the clamping chucks (5) for taking up the wire (7), pipe, or profile which is to be drawn are capable of being moved towards and away from one another in a controlled manner, characterised in that
   the clamping devices (6) exhibit retaining elements (11) holding the clamping chucks (5), said retaining elements engaging in each case through the related drawing element (3) in a direction parallel to the axis of the wheels (4).
2. The drawing machine according to Claim 1, characterised in that the drawing elements (3) are of the nature of chains.
3. The drawing machine according to Claim 1 or 2, characterised in that the clamping chucks (5) are controlled by control curves (8).
4. The drawing machine according to one of Claims 1 to 3, characterised in that the clamping chucks (5) are controlled hydraulically or pneumatically.
5. The drawing machine according to one of the foregoing Claims, characterised in that the clamping devices (6) exhibit in each case two wedge elements (9a, 9b) capable of being displaced in relation to one another, one of which is displaced relative to the other in the event of friction contact with the wire (7), pipe, or profile, whereby an increased wedging and clamping effect is imposed on the wire (7), the pipe, or the profile.

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