EP0950442A2 - Device for cutting wire windings - Google Patents

Abstract

A heated wire (2a,b) is continually formed to a precise diameter into a helical shape by a die former (1) and a pair of arc-shaped separators (4a,b) are moved cyclically by an electric motor (8) and gearbox (10) to isolate a coil which is sheared by cutters (5a,b) similarly moved.

Description

The invention relates to an apparatus and a method for Cutting a continuous wire that is in Form of coils emerges from a coiler.

Wire is usually made by rolling and drawing. After the rolling, the wire passes through a winding layer, and the wire windings are then used to cool down Laying roller conveyor and a winding conveyor belt promoted to via an infeed roller table in a bundle chamber below Use of a mandrel to form a bundle become. The wire bundle is then picked up with a hook.

In the case of a bundle of wires, the initial turns are rejected. reason this is a different cooling of the first turns, the one with the still cold roller tables of the Turn conveyor belt come into contact during the cool subsequent turns more evenly. In the Initial turns result in undesirable structural changes. The initial turns are therefore over after transportation cut the winding conveyor belt, i.e. at the end of the belt, in the bundle chamber or only on the hook. This does not constitute Difficulty because the initial turns on the hook on the hang open side and are therefore easily accessible.

Because the end of a wire bundle is not true to size, this is also committee. In contrast to the initial turns the final turns within a covenant are difficult accessible. The rear turns can only be under great efforts in the bundle chamber or cut off on the hook and be removed. This is connected with one unsafe and accident-prone mode of operation with high personnel Time expenditure.

The invention is based on this prior art the task is a fast and accurate device to create targeted with the wire twists can be cut off. Furthermore, a corresponding Procedures are created.

This task is accomplished by an apparatus and a method solved according to the features of claims 1 and 11.

For this purpose, a cutting device is proposed that immediately is arranged behind the winding layer.

It includes fishing gear for the targeted grasping of a winding arc and means for severing this winding arc. It are means of controlling the movement sequence of the catch and Release agent provided. The control takes place, for example depending on the wire properties such as the wire diameter with inaccuracies. Furthermore, the Catch and release agent depending on the working position of the winding layer can be controlled.

The end turns, which are rejects, are used the proposed device no longer at the end of the belt, removed in the bundle chamber or only on the hook, but immediately after exiting the laying tube of a Winding layer.

This device shows the following advantages.

The wire windings have immediately behind the winding layer an even distance from each other, and the fishing gear can be moved between the individual turns, thus the reject turns from the true turns to separate.

The interface on the winding circumference is adjustable so that always pulling the end of the last dimensionally correct wire winding can be transported on the winding conveyor belt. This ensures undisturbed transport of the tortuous Wire over the conveyor roller tables without snagging the Final turn. This eliminates the time-consuming and unsafe process Position at the end of the wire.

Furthermore, the cut can be made perpendicular to the wire. There is no need for large cutting forces as a result of the high processing temperature of the wire.

As the laying roller table begins immediately after the winding layer, can the space between the two stations as well as the space below the laying roller table for disposal of the committee material can be used.

In a preferred embodiment, the catching means are made from two (catching) arms, which, viewed in the direction of the turns, are staggered. The corresponds to Offset between the two arms the pitch angle one Wire winding. These two arms thus form a kind of catch fork for a winding arc.

The two arms advantageously have an arc shape, which correspond to the curvature of a turn. They are from driven outside under a winding arc and thus create briefly a base for one turn and thus one calm point of attack for the release agent. This release agent in the form of a pair of scissors grips the winding arch at the point that is not supported by the poor.

The scissors consist of an upper and a lower one Shear element together. The upper shear element is like this stored that it makes a circular motion, meanwhile the lower shear element with the lower knife vibrates goes through.

The tentacles and scissors are regarding the start of movement Controllable end and end. This is achieved through respective Drive systems using sensors used in process plants, for example the rolling mill, in front of the winding layer or are attached to the winding layer itself become. The sensors are preferably photocells. If there is an inaccuracy in the wire diameter occurs, this is recorded by the sensor and the start of movement initiated for the tentacles and scissors.

It is preferably the movement of the two Tentacles around a swinging motion. The two arms swing purposefully towards each other and away from each other. This is achieved by means of a crank arm system, the one Can convert rotary motion into a swinging motion.

The drive for this swing system can be reached after the smallest distance between the two tentacles and stopped to separate and fall off to wait for the winding arches. If the cut turns but falling quickly, there is no interruption the vibration movement.

The shear element is also driven around a crank arm system.

The crank arm systems are driven by everyone any motor, preferably an electric motor with a small one Moment of inertia.

It is recommended to use a semicircular upper arm To provide a coat to catch the flinging outwards Coils.

A method is also proposed. Here will the sequence of movements and the speed of the fishing gear for a winding arc and release agent controlled so that the Catches under a certain winding shortly after swinging out of the coiler and the Release agent cut through the stabilized winding arc. This is where the catching and release agents begin to move shortly after.

Figur 1

eine Seitenansicht einer Ausführungsform der Schneidvorrichtung sowie des Windungslegers mit Legerollgang;

Figur 2

einen vergrößerten Ausschnitt der Figur 1;

Figur 3

eine Draufsicht der Schneidvorrichtung, gesehen von der Austrittsseite des Windungslegers;

Figur 4

eine Draufsicht der Schneidvorrichtung.

Further details and advantages of the invention result from the claims and the following description, in which the exemplary embodiments of the invention illustrated in the figures are explained in more detail. Here show:

Figure 1

a side view of an embodiment of the cutting device and the winding layer with roller roller;

Figure 2

an enlarged section of Figure 1;

Figure 3

a plan view of the cutting device, seen from the exit side of the winding layer;

Figure 4

a plan view of the cutting device.

Figure 1 shows a winding layer 1 with a laying tube 1a and Exit 1b. After processing the wire, for example in the rolling mill, this is laid in turns and in this Form (2a, b) on the laying roller table 3 to Conveyor belt (not shown) transported.

An upper and lower tentacles 4a, 4b are located between a winding arc. The upper and lower shear element is represented schematically with 5a, 5b. The tentacles 4a, 4b and the shear elements 5a, 5b are directly behind the laying tube 1a the winding layer 1 arranged. The cut wire board falls over the chute 6 into a collecting container 7, with the chute 6 directly below the tentacles 4a, 4b and scissors 5a, 5b.

Below the chute 6, a chopper can be known Type with helical knives (not shown) be arranged.

The two tentacles 5a, 5b are offset from one another at a distance arranged, the distance of the slope of a Corresponding winding arc (Figure 2).

The tentacles are swung into a winding arc. The Shear elements 5a, 5b act on the wire, which is not supported by the tentacles 4a, 4b. The speed the scissors correspond to the speed of the wire, here 3m / sec.

An embodiment of the tentacles 4a, 4b and whose drive will be explained in more detail. Figure 3 shows a top view two arcuate tentacles 4a, 4b, the curvature of the corresponds to a winding arc. Here is the upper tentacle 4a with a semicircular jacket 4c so that the last turns are not thrown out.

The two tentacles swing into and out of an arc the separation process back again. The drive for this is provided a motor 8 (Figure 4), which has a clutch 9 and a transmission 10 and a gear set 11 via a common drive shaft 12 drives two eccentric disks 13a, 13b. This are via bolts 14a, 14b with a coupling rod 15a, 15b connected, which in turn via a bolt 16a, 16b second eccentric 17a, 17b drives on the output shaft 18a, 18b is mounted. Input and output shaft are located in a common housing 18c. In the Figure 4 is the direction of rotation of the output shaft 18a, 18b shown the preferred direction for right-hand wire.

The tentacles 4a, 4b are welded to the Eccentric disc 17a, 17b attached. Thus, the first forms Eccentric disc 13a, 13b with the corresponding catch arm 4a, 4b one unit. Overall, it is a crank arm drive.

It is recommended between the glowing turns of wire and the drive mechanism is air or water cooled Protective hood to be arranged (not shown here).

An embodiment of the drive of the shear element shows FIG. 3. The upper shear element 5a has an upper knife 19a, the lower shear element 5b has a lower knife 19b. As a drive system a crank arm system is also provided. The upper element runs in a circular motion. It has an acceleration and deceleration angle of approx. 270 °.

The scissors are driven by a motor 20 via the Couplings 21 and 22 and the transmission 23. This drives a shaft 24 with an eccentric 25 as a crank connected is. On the eccentric 25 is the upper knife 19a attached, which undergoes a circular movement (see also Figure 4). The lower knife 19b is on a coupling rod 26 attached. This is via the second shaft 27, which in one common housing 28 is mounted with the shaft 24 via a swing arm 29 guided.

If necessary, the shaft 27 and the rocker 29 can be in shape an eccentric disc on the other side of the coupling rod 26, as shown in dashed lines in Figure 3 is shown. In this embodiment, is a additional housing 30 necessary. This embodiment proves to be particularly useful in tight spaces advantageous.

Furthermore, the space between the tentacles on the drive side as well as between the tentacles and scissors on the The scissor side should be as low as possible so that the remaining turns when impacting the tentacles are not or are only slightly bent.

The method according to the invention is described below become.

There is a photocell behind the finishing block of a rolling mill arranged. If the wire is inaccurate, this gives a signal via a timer depending on the length to be cut. The next zero position of the winding layer 1 waited and then a command for the Start of movement and the speed of the tentacles 4a, 4b and scissors 5a, 5b. The time to start moving and the speed of the tentacles 4a, 4b and scissors 5a, 5b are chosen so that the tentacles and the shear elements between the last proper wire winding and the swing or get the first reel turn. The The wire only touches shortly before the cut begins (cf. Sectional view of the scissors in Figure 4). The speed of the upper knife corresponds approximately to the horizontal speed at the start of the cut of the wire turns so the wire is affected as little as possible by the scissors. At the The cutting process first touches the upper knife 19a on the wire. The movements of the upper and lower knife 19a, 19b and upper and lower shear elements 5a, 5b are more clearly shown in Figure 4 shown in the sectional position and the catch position.

List of reference numbers:

1

Coil layer

1a

Laying pipe

1b

Exit of the winding layer

2a, b

Winding arches

3rd

Laying roller table

4a, b

Tentacles

4c

semicircular coat

5a, b

Shear elements

6

Chute

7

Collecting container

8th

Motor (tentacles)

9

clutch

10th

transmission

11

Gear set

12th

drive shaft

13a, b

Eccentric discs

14a, b

bolt

15a, b

Coupling rods

16a, b

bolt

17a, b

second eccentric discs

18a, b

Output shafts

18c

Housing (tentacle drive)

19a

Top knife

19b

Lower knife

20th

Motor (scissors)

21

clutch

22

clutch

23

transmission

24th

wave

25th

Eccentric disc

26

Coupling rod

27

second wave

28

Housing (scissors drive)

29

Swingarm

30th

additional housing

Claims (12)

Device for cutting a continuously running wire, which emerges in the form of turns from a winding layer,
characterized,
that this catching means (4a, b) for a winding arc comprises means for severing (5a, b) this winding arc and means for controlling the course of movement of the catching means and separating means, the catching means (4a, b) and the separating means (5a, b) are arranged immediately behind the winding layer (1,2). Device according to claim 1,
characterized,
that the catch means (4a, b) are two catch arms which can be moved towards and away from each other and which, viewed in the direction of winding, are arranged offset to one another and that the offset between the arms corresponds to the pitch angle of a wire winding. Device according to claim 1,
characterized,
that the separating means (5a, b) are scissors that separate the winding arc at the point that is not supported by the arms (4a, b). Device according to claim 3,
characterized,
that these scissors are composed of an upper and a lower shear element (5a, b) with an upper and lower knife (19a, b), the upper shear element with the upper knife undergoing a circular movement. Device according to claim 1,
characterized,
that the control means are activated via sensors which are attached in process plants in front of the winding layer or on the winding layer itself. Device according to claim 5,
characterized,
that these sensors are photocells. Device according to claim 2,
characterized,
that the movement of the two tentacles (4a, b) is swinging. Device according to claim 7,
characterized,
that it is in the swing drive of the arms is a crank swing system that converts a rotational movement into an oscillatory movement. Device according to claim 4,
characterized,
that the drive of the scissors is a crank arm system. Device according to claims 2 and 7,
characterized,
that the upper arm (4a) has a semicircular jacket (4c) for collecting the windings flung outwards. Process for cutting a continuously running wire, which emerges from a winding layer in the form of turns,
characterized,
that catching means (4a, b) and separating means (5a, 5b) are controlled with regard to their movement sequence and their speed in such a way that the catching means vibrate under a certain winding arc shortly after it emerges from the winding layer and the separating means sever the winding arc thus stabilized. A method according to claim 11,
characterized,
that the fishing gear and the release agent are operated at different times.

Images