EP0689484B1 - Process and arrangement for separating wire windings - Google Patents

Abstract

A process and arrangement are disclosed for separating wire windings shaped out of a series of windings made of hot-rolled wire and deposited in a series of successive windings on a winding conveyor. The last and first end windings are separated therefrom and supplied to a severing arrangement controlled by sensors and by a computer. The object of the invention is to limit the severing process to a determined area and to shorten the displacement paths of the severing arrangement, as well as the time taken by the severing process. For that purpose, the last and first end windings of a series of successive windings (7, 9) are separated by a cutting device. Said windings are separated from the intermediate windings at two spots and a thus separated sample (40) is supplied to a catching arrangement (6). The cutting device separates the last and first end windings (7, 9) by retaining the intermediate windings (8) and then sends them on the winding conveyor (2) to a stationary ejector (10) which deposits them on a scrap conveyor (41).

Description

The invention relates to a method and a device for cutting off wire windings by a coiler formed from warm-rolled wire and onto a winding conveyor are placed in successive turns, the rear and front end turns of the same being separated and a device for separating them via sensors and fed to a computer in a controlled manner.

EP 0 255 724 already provides a method and device known for dividing wire turns by one Coil coater is formed from hot-rolled wire and placed on the conveyor have been deposited, on which the wire turns a collecting device are promoted, above the Funding a movable arrangement with a transducer for one or more wire turns and a cutting device is arranged, which detects a wire winding with a sensor and separates a predetermined turn and one Separation takes place, with movable units after detection the predetermined wire winding via a sensor at speed of the detected wire winding to record the Wire turns are synchronized and a variable in height Tool head between the wire windings to below the conveyor level is lowered, the detected wire winding in a recording with the associated cutting device of the tool head in the area of the funding level and after Cut the separated part as waste using a holder on Tool head picked up and in the area outside the conveyor track is dropped before its starting position above the Funding is re-adjustable.

In this solution, the device has a large number of functions perceive. Longer travels are necessary require a corresponding amount of time. With that the Device complicated and prone to failure. With the intended Use of a high lifting and rotating column with a large cantilever occurs large vibrations, that interfere with the separation process.

The invention has for its object a method and a device for separating wire windings from a coil layer made of hot-rolled wire and placed on one Winding conveyor stored in successive turns be the rear and front end turns the same separated and a device for separation, via Sensors and a computer are controlled, fed, too create, the separation process in a predetermined range takes place and the travel of the device for separation is reduced as well as the time required for the separation process will. This object is achieved by the features of claims 1,5 and 8 solved.

According to the invention, the method is characterized in that a Part of the device for separating wire windings Device for cutting over the rear end turns to be separated a turn position is lowered and by this the rear end turn to be separated into a cutting position brought and separated from the middle turns in two places is, one between the two separation points Sample is fed to a safety gear and by the device for cutting the separated rear end turns held and at a point in the area of the separation point fixed and thereby by those on the winding conveyor medium turns of wire moving in the direction of transport spatially separated and then by an upward movement of the Cutting device released again and in the direction of transport be moved on the winding conveyor as well continue to cut the device over to be separated front end turns of the following turn position is lowered and through this the front end turn to be separated into one Cutting position brought and in two places from the middle Winding position is separated, one between the two Test piece lying at the separating points is fed to a catching device is and by the device for cutting the separated front end turns held and with a faster than the transport speed of the winding conveyor moved in its transport direction and thereby of those on the winding conveyor at its transport speed forward-moving medium turns spatially separated and then by an upward movement of the device released for cutting again and in the direction of transport the winding conveyor are moved and after replacement a predetermined distance between the successive Winding layers and spatially separated from these rear and front end turns from a stationary ejector picked up and deposited on a scrap disposal.

This can separate the rear and front end turns of the successive turns in one temporal succession by a device for cutting be performed.

Another possibility is that the separation of the rear and front end turns of the successive Turn positions almost simultaneously by another Cutting device is carried out.

Preferably the rear and front end turns are over the scrap removal is fed into a scrap shear and there in divided further sections.

The inventive method ensures that the Device for cutting wire windings only relatively small Must travel to work. A solution was developed with which it is possible to separate the front ones and rear end turns as so-called scrap turns of the middle turns, the so-called good turns, in each case spatially two successive turns to separate and on the winding conveyor after separation continue to transport together until they are stationary Ejectors are placed on a scrap disposal. The middle wire turns are then in a manner known per se fed to the federal collector.

In further training, the solution includes a facility for Implementation of the method, this being known per se Do one on rails parallel to the winding conveyor Movable gantry frame, which with a across the Winding conveyor and in the direction of the same downward and Tool plate is provided at the top, on which the Device for cutting the rear and front end turns is arranged. According to the invention it is that the Device for cutting two at a lateral distance mutually arranged knife levers, which with the to be separated Insertion tips bringing end turns into the cutting position and knives are provided, the lateral distance of the knife lever to each other the length of the corresponds to the sample to be removed from the final turn.

It is possible that the insertion tip and the knives are arranged in succession on one component.

To make it easier to fix the end turn to be separated, it is advantageous if the insertion tip on the knife lever sideways next to the knives protruding forward over these is assigned, the knife being a relatively blunt lower one End.

In a further development, the solution according to the invention comprises a further facility to carry out the procedure. Here is the device at least on both sides of the winding conveyor each with a stationary stand provided in which one is perpendicular to the longitudinal axis of the Winding conveyor above the same extending shaft is rotatably mounted on the two rotatable about its longitudinal axis Cutting arms arranged at a lateral distance from one another are, the device at the front ends of the cutting arms arranged for cutting the rear and front end turns is which two are at a lateral distance from each other arranged upper knife and insertion tips, wherein each top knife one below the top edge of the winding conveyor assigned stationary knife is, an upper knife is arranged on each cutting arm and the lateral distance of the top knife the length of the from the End piece to be removed corresponds to the test piece.

With this solution to carry out the method, the Device for cutting the rear and front end turns a rotary movement instead of a translational one Movement out. This makes it possible to implement the invention Procedures with different and for each special To implement areas of application particularly cheap facilities.

To achieve an energy-saving cutting of the wire turns, it is advantageous if the two on the shaft Cutting arms in the direction of rotation around a range of 6 ° to 19 ° are mutually offset.

To further reduce the effort when cutting an advantageous option in that each upper knife with lower knives arranged on both sides is in a cutting connection, the ones assigned to the first upper knife Lower knife and those assigned to the second upper knife Lower knives each around a vertical range of c; g = 0.2 d to 0.8 d are arranged offset from one another.

To achieve a simplified control of the separation process and to enable a largely trouble-free way of working, can conveniently each one Device for separating the rear end turns of the in Direction of transport forward winding position with itself clockwise rotating cutting arms and a device for severing of the front end turns of the rear end in the direction of transport Turn position with counter-clockwise rotation Has cutting arms, these at a predetermined distance arranged to each other along the winding conveyor are. A sensor can be assigned to each device be.

Fig. 1a bis 1e

eine schematische Darstellung des Transportes der Drahtwindungen sowie des Abtrennens von solchen auf einem Windungstransporteur in der Draufsicht

Fig. 2

die Seitenansicht des Windungstransporteurs mit einer Einrichtung zum Abtrennen von Drahtwindungen

Fig. 3

die Vorderansicht nach Fig. 1

Fig. 4a bis 4d

die Seitenansicht des Windungstransporteurs mit einem Auswerfer in vier Arbeitsstellungen

Fig. 5

die Draufsicht nach Fig. 4a

Fig. 6

die Vorderansicht einer Vorrichtung zum Schneiden in Transportrichtung

Fig. 7

den Schnitt A-A nach Fig. 6

Fig. 8

die Seitenansicht einer Vorrichtung zum Schneiden

Fig. 9

die Vorderansicht nach Fig. 8

Fig. 10

die Seitenansicht einer weiteren Ausführungsform der Vorrichtung zum Schneiden

Fig. 11

die Vorderansicht nach Fig. 10

Fig. 12

die Seitenansicht des Windungstransporteurs mit einer weiteren Einrichtung zum Abtrennen von Drahtwindungen sowie einem Auswerfer

Fig. 13

die Draufsicht nach Fig. 12

Fig. 14

die Seitenansicht der Einrichtung zum Abtrennen und Separieren der vorderen Endwindungen nach Fig. 12

Fig. 15

die Seitenansicht der Einrichtung zum Abtrennen und Separieren der hinteren Endwindungen nach Fig. 12

Fig. 16

die Vorderansicht einer Vorrichtung zum Schneiden in Transportrichtung entsprechend Fig. 12

Fig. 17

die Vorderansicht der Anordnung der Ober- und Untermesser nach Fig. 16

The invention is explained in more detail using an exemplary embodiment. In the accompanying drawing:

1a to 1e

a schematic representation of the transport of the wire turns and the separation of those on a winding conveyor in the plan view

Fig. 2

the side view of the winding conveyor with a device for separating wire turns

Fig. 3

the front view of FIG. 1st

4a to 4d

the side view of the winding conveyor with an ejector in four working positions

Fig. 5

the top view of Fig. 4a

Fig. 6

the front view of a device for cutting in the transport direction

Fig. 7

the section AA according to FIG. 6

Fig. 8

the side view of a device for cutting

Fig. 9

the front view of FIG .. 8

Fig. 10

the side view of another embodiment of the device for cutting

Fig. 11

10 shows the front view according to FIG. 10

Fig. 12

the side view of the winding conveyor with a further device for separating wire windings and an ejector

Fig. 13

the top view of FIG. 12th

Fig. 14

the side view of the device for severing and separating the front end turns of FIG. 12th

Fig. 15

the side view of the device for separating and separating the rear end turns of FIG. 12th

Fig. 16

the front view of a device for cutting in the transport direction corresponding to FIG. 12

Fig. 17

the front view of the arrangement of the upper and lower knife of FIG. 16th

In a wire rolling mill, a coil layer turns wire 1 formed from hot-rolled wire and onto a winding conveyor 2 filed in successive turns and the front end turns 9 and the rear end turns 7 separated from the middle turns 8. This takes place in a manner known per se by accelerating one Roller table. All wire turns 1 are by means of the winding conveyor 2 in the direction of a collecting shaft, not shown transported. The rear end turns 7 and the front end turns 9 of the middle turns 8 separated by a facility. The separation process is through Sensors 3; 3 '; 3 '', which with a control device or are connected to a computer, controlled.

The device for separating has a device for Cut on which over the rear end turns to be separated 7 of the front turn position is lowered and brings this automatically into a cutting position. The one to be separated End turn 7 is separated in two places, and the separated one Sample 40 is fed to a catching device 6.

The cutting device holds the separated rear End turns 7 initially fixed to them after spatial separation from the middle turns 8, the so-called good turns, which are transported further with the winding conveyor 2, release by booting. It continues to sink over the front windings to be separated 9 of the following Turn position and brings the parts to be separated into one Cutting position. Then they are separated in two places and the detached test piece 40 also of the catching device 6 fed. The device for cutting holds the severed front end turns 9 firmly, takes them one compared to the transport speed on the winding conveyor 2 accelerated movement in the conveying direction with and pulls them out from under the middle turns 8. The device for separating then gives the separated front end turns 9 free by starting. Subsequently the separated rear and front end turns 7; 9 as scrap windings from a stationary ejector 10 added and fed to a scrap removal 41. Here, they are preferably shown by a Scrap shear divided into several sections before being in one Scrap buckets are collected. Of course it is also possible then collect them undivided in a scrap container however, the parts are relatively bulky.

1 to 11, an embodiment of the device for separating front and rear end turns 7; 9 described by the middle turns 8, the good turns. The separation of the same is necessary since the beginning and / or wire section created in the end meet the quality requirements and / or thickness tolerances are not sufficient. One calls therefore they also as scrap windings.

If one considers two successive cases as time-critical Turn positions, so the rear end turn 7 passes the front 1a the point A at which it turns is detected by a sensor 3 in the form of a rolling stock indicator, which gives the start impulse to the device for separating the is in a starting position I. Up to one position II the device is synchronized with the turn position so that insertion tips 25 shown in FIG. 2 just above the rear end turn 7 to be cut and the lowering pulse for the detachment device is triggered. The on the pairs of knives 4; 5 insertion tips 25 penetrate the winding position and lead the one to be separated rear end turn 7 to the blades 28 of the device for To cut. The rear end turn 7 is divided into two places; the sample cut out falls down a catching device 6 and is fed to the test center. Corresponding Fig. 1b remains in the device for separation Position III and thus pulls between the rear end turns 7 and the middle turns 8 a gap.

Then the cutting device is lifted and maintained then via the sensor or a second sensor 3 'and one Timing the pulse to accelerate, synchronize and Lower when the front end turn 9 sought is the new one Turn position is exactly in the pre-calculated position (Fig. 1c). Here falls in a position IV after cutting both Pairs of knives 4; 5 the test piece 40 in the catching device 6.

By accelerating the disconnect facility over the Speed of the winding conveyor 2 also arises here too a gap between the front end turns 9 and the middle turns 8, as shown in Fig. 1d as position V. is.

At the same time, the stationary ejector 10 engages the rear End turns 7 of the front turn position and remains in this Position until the front end turns 9 of the following turn position transported up, grabs them and pulls them in the direction of the arrow according to FIG. 1e with simultaneous lifting. The End turns 7; 9 are handed over to scrap removal 41. In at this time the detachment device moves back into the Starting position I.

The essential parts of the moving device for separation of wire turns are shown in Figs. 2 and 3. The wire turns 1 lie on the winding conveyor 2, the in the present case consists of transport chains. Next to the Winding conveyor 2 are rails in its longitudinal direction 11; 12 arranged. The separation device is on these traversable by wire windings. You can for example by a cable 13 can be moved in translation. The facility has a drive 14 on which a portal frame with columns 15 and this horizontally connecting guide bar 16 are arranged are. Slide strips 17 engage in the guide beams 16 a slide plate 18, which by means of a working cylinder 19 horizontally displaceable in its working or rest position is movable.

A working cylinder 20 is also located on the slide plate 18 for a vertical movement of a tool plate 21, which by Guide bars 22 is fixed, attached. Below the tool plate 21 are hydraulic cylinders 23 for the two devices for cutting, the knife lever 24 below with the Insertion tips 25 are provided.

8 and 9 is the formation of the knife lever 24 with Knives 28 and the insertion tips 25 shown in more detail. Here the insertion tips 25 are formed in one piece with the knives 28.

To safely center and cut the target rear and front end turns 7; 9 when sampling guarantee is also in a further embodiment Formation of the device for cutting according to FIG. 6; 7; 10; 11 possible. Point the knife lever 24 with the knife 28 separate insertion tips 25. The insertion tips 25 are arranged as separate parts next to the knives 28. The knives 28 are relatively blunt bottom end on. This separation makes it safe to grasp and holding the rear and front end turns 7; 9 possible. 7 provides that, for example the left device for cutting first lowered and the End turns 7; 9 due to the special arrangement of the insertion tips 25 be centered. This ensures that when subsequent lowering of the right device the same turn 7; 9 is hit safely.

For removing the separated front and rear end turns 7; 9 of the winding conveyor 2 is next to this an ejector 10 as in Fig. 1d; 1e shown, arranged.

The ejector 10, for which no protection is claimed in the patent has, as shown in Fig. 4a to Fig. 4d and in Fig. 5, an ejector arm 26 with a pick-up finger 27. 4a and 5, the ejector 10 is in the waiting position shown. The receiving finger 27 is located above the Turn conveyor 2 with the wire turns 1.

By rotating the ejector arm 26 against its longitudinal axis the direction of transport of the winding conveyor 2 plunges Pick-up finger 27 after separation between the rear end turns 7 and the middle turns 8 (Fig. 4b). The rear end turns 7 are thus by holding on whole circumference of the middle turns 8 of the turn position pulled down. The ejector arm 26 and the receiving finger 27 remain in this position until the front end turns 9 the following turn position come into their area (Fig. 4c). Now the ejector arm 26 rotates about its longitudinal axis and pivots the pick-up finger 27 with the end turns 7; 9 after above (Fig. 4d).

The ejector arm 26 swings laterally about the vertical axis of rotation the ejector 10 to the outside, and the rear and front End turns 7; 9 are fed to scrap removal 41.

The whole process of separating and removing the final turns 7; 9 is by one or more sensors 3; 3 '; 3 '' triggered.

The transport of the wire turns 1 on the winding conveyor 2 can, for example, via a computer depending on its speed and the distance between turns can be tracked. After choosing the number of turns to be cut or a specific number Winding temperature during separation takes place automatically Pulse output to the individual drives for traveling, lowering, Lifting, cutting, capturing and ejecting.

A further embodiment of FIG Device for separating rear and front end turns 7; 9 described by the middle turns 8, the good turns. As described above, in this embodiment from a coiler also a warmer Wire shaped into wire turns 1 and onto a winding conveyor 2 filed, with the rear and front end turns 7; 9 are separated from the middle turns 8. Here several turns follow each other.

The device for cutting off wire windings 1 is opposed the embodiment described above arranged stationary. It cannot be moved. 12 to 15 is one Device with two separate devices 30; 31 to separate shown. A device 31 is used for separation the front end turns 9 of the second turn position and the second device 30 for separating the rear end windings 7 the first turn position.

It is of course also possible with an appropriate control a device with a device for separating To provide wire turns 1.

One or more are located to the side of the winding conveyor 2 Sensors 3; 3 '; 3 '' arranged, the corresponding impulses to the Give the computer that controls the system.

As shown in Figs. 12 and 13, are on the winding conveyor 2 two separation devices 30; 31 arranged in a row. The front device in the direction of transport serves 30 for separating the rear end turns 7 of the front Winding position and the rear device 31 for separating the front end turns 9 of the rear turn position, each of the middle turns 8. The rear and front end turns 7; 9 are the windings to be removed while the middle turns 8 to be fed to the collecting shaft Are good turns.

Both devices 30; 31 have the same structure. Of the Device 30 is sensor 3 'and device 31 of Assigned to sensor 3. In each device 30; 31 is on both A stand 32 is arranged on the side of the winding conveyor 2. In these stands 32 is one across the width of the winding conveyor 2, horizontal shaft 33 stored. On this shaft 33 there are two cutting arms 34 in one predetermined distance from each other fixed. On the front The end of each cutting arm 34 is an upper knife 35 with insertion tips 36 arranged. Below the top edge of the winding conveyor 2 are the upper knives 35 stationary lower knives 37 assigned. The shaft 33 is connected to a gear 38 Drive motor 39 connected by which it is rotated and so that the cutting arm 34 executes a circular movement.

The operation of the device for separating wire windings 1 is described below.

When transporting the front end turns 9, past the first Sensor 3, the cutting arm 34 of the device 31 is in the upper rest position. Taking into account the selectable Rotation time of the cutting arm 34 from the rest to Interface and the transport time of the pieces to be cut front end turn 9 from the detection by the sensor 3 to the computer determines the start time for the interface for the drive motor 39, the shaft 33 via the gear 38 spun. Which is preferably at a small angle Guide cutting arms 34 offset in the direction of rotation the cutting process shortly after the insertion tips 36 out the selected front end turn 9 to have. Depending on the type of winding conveyor 2, for example Chain conveyor or roller table, or depending on the design Conditions in the area of the winding conveyor 2 each cutting arm 34 guides with its upper knife 35, as in FIG. 16, a double cut against two lower knives 37 or a single cut against a lower knife 37. Hereby 16, the test piece 40 is separated out, as shown in FIG. that falls down into the catching device 6 and the test laboratory is fed.

As can be seen from FIG. 14, the cutting arm 34 rotates in the opposite direction clockwise until it is approximately at the bottom Position. Here he pulls the front end turns 9 a piece sufficient for the later ejection process emerges from the turns 8. Then the cutting arm 34 rotates Clockwise back to the top position so that the horizontal Further transport of the front end turns 9 by means of the winding conveyor 2 is not hindered.

The separation of the rear is carried out in a comparable manner End turns 7 (Fig. 1, 2 and 4) with the device 30. This has a mirror-image structure to the device 31. Based on the counts of the first sensor 3 or second sensor 3 ', the cutting arms 34 of the device 30 via the computer by means of their drive from the upper one Rest position clockwise so that the Upper knife 35, the rear end winding to be cut 7 in Cutting position above the assigned lower knife 37 meets. As the cutter arms 34 continue to rotate clockwise after the cut, their speed is reached until it is reached a vertical lower position to a standstill decreased. The rear end turns 7 of the middle turns 8 at least partially used. After The cutting arms rotate to form a sufficient gap 34 counterclockwise to the upper rest position, without to touch the wire turns 1.

When the wire turns 1 are transported further by means of the turn conveyor 2 in the area of the ejector 10 this after impulse by the third sensor 3 '' or after Evaluation of the counting pulses from the first or second sensor 3; 3 ' set in motion considering the transport time. The severed rear and front end turns 7; 9 are considered Wraps of scrap taken from the winding conveyor 2 and laterally thrown into the scrap disposal 42.

In order to distribute the cutting forces, the cut of two runs Cutting arms 34 against two lower knives 37, for example according to the arrangement in Fig. 17. When the shaft 33 rotates touches the right upper knife after traveling a distance a 35.1 for example the front end turn to be divided 9 after this from the two right insertion tips 36.1 has been brought into the correct position. Then pushes that right upper knife 35.1 the final turn 9 after the path b = 0 ... 10 mm first against the lower knife 37.1 and guides the cutting process at this point. After exceeding the maximum cutting force or after completely cutting the wire winding at this point the end turn 9 now touches the lower knife 37.2. The vertical offset c of the two lower knives 37.1; 37.2 is chosen in a range c = 0.2 x d to 0.8 x d.

Weg

f = 0 ... 10 mm

Bereich

g = 0,2 x d ... 0,8 x d

Bereich

e - a = 2 x c
d = Drahtdurchmesser

At precisely this point in time, when the right upper knife 35.1 has covered a distance of the value c along the lower knife 37.2, the left upper knife 35.2 presses the end turn 9 against the left lower knife 37.3. The shearing process then takes place between the upper knife 35.2 and the lower knife 37.4. The values for the cutting process on the left are analogous to those on the right

path

f = 0 ... 10 mm

Area

g = 0.2 xd ... 0.8 xd

Area

e - a = 2 xc
d = wire diameter

Thus, four cutting processes occur in succession with the same Cutting forces that do not add up. The corresponding Machine parts and the drive can be weaker accordingly be designed.

The distance c between the lower knives 37.1; 37.2 and the Distance h between the lower knives 37.3; 37.4 can differ from Enlarge top to bottom so that those cut out in the double cut Waste pieces fall out without jamming.

Claims (12)

1. Method for cutting off wire windings which are formed from hot-rolled wire by a winding layering apparatus and are deposited in successive winding layers on a winding conveyor, the initial and end windings of the same being separated and fed to a cutting-off apparatus in a controlled manner via sensors and a computer, characterized in that a cutting device, which forms part of the apparatus for cutting off the wire windings, is lowered over the rear end windings (7), which are to be cut off, of a winding layer, and the rear end winding (7) to be cut off is put into a cutting position by this cutting device and is cut off from the intermediate windings (8) at two points, in which arrangement a test piece (40) lying between the two cutting-off points is fed to a collecting device (6), and the cut-off rear end windings (7) are retained by the cutting device, are fixed at a point in the region of the cutting-off point and are thereby spatially separated from the intermediate wire windings (8) moved further on the winding conveyor (2) in the conveying direction, and are then released again by an upward movement of the cutting device and are moved further in the conveying direction on the winding conveyor (2), and furthermore the cutting device is lowered over the front end windings (9), which are to be cut off, of the following winding layer, and the front end winding (9) to be cut off is put into a cutting position by this cutting device and is cut off from the intermediate winding layer (8) at two points, in which arrangement a test piece (40) lying between the two cutting-off points is fed to a collecting device (6), and the cut-off front end windings (9) are retained by the cutting device, are moved further in the conveying direction of the winding conveyor (2) at a faster speed than the conveying speed of the latter and are thereby spatially separated from the intermediate windings (8) moved forwards on the winding conveyor (2) at the conveying speed of the latter, and are then released again by an upward movement of the cutting device and moved further in the conveying direction on the winding conveyor (2), and, after covering a predetermined distance, the rear and front end windings (7; 9) cut off between the successive winding layers and spatially separated from the latter are picked up by a stationary ejector (10) and deposited on a scrap-discharge means (41).
2. Method according to Claim 1, characterized in that the rear and front end windings (7; 9) are cut off from the successive winding layers in a time sequence by a cutting device.
3. Method according to Claim 1, characterized in that the rear and front end windings (7; 9) are cut off from the successive winding layers approximately simultaneously by in each case a different cutting device.
4. Method according to Claim 1, characterized in that the rear and front end windings (7; 9) are fed to scrap shears via a scrap-discharge means (41).
5. Apparatus for cutting off wire windings which are formed from hot-rolled wire by a winding layering apparatus and are deposited on a winding conveyor in successive winding layers, the initial and end windings of the same being separated and fed to a cutting-off apparatus in a controlled manner via sensors and a computer, the apparatus having a portal frame, which is traversable on rails parallel to the winding conveyor and is provided with a tool plate, which is displaceable transversely over the winding conveyor as well as downwards and upwards in the direction of the same and on which the device for cutting the rear and front end windings is arranged, characterized in that the cutting device has two blade levers (24), which are arranged at a lateral distance from one another and are provided with insertion tips (25), which put the end windings (7; 9) to be cut off into the cutting position, and with blades (28), the lateral distance between the blades (24) corresponding to the length of the test piece (40) to be cut out of the end winding (7; 9).
6. Apparatus according to Claim 5, characterized in that the insertion tip (25) and the blades (28) are arranged on the blade lever (24) in such a way as to follow one another on one component.
7. Apparatus according to Claims 5 and 6, characterized in that the insertion tips (25) are arranged on the blade lever (24) laterally next to the blades (28) in such a way as to project forwards beyond the latter, the blades (28) having a relatively blunt bottom end.
8. Apparatus for cutting off wire windings which are formed from hot-rolled wire by a winding layering apparatus and are deposited on a winding conveyor in successive winding layers, the initial and end windings of the same being separated and fed to a cutting-off apparatus in a controlled manner via sensors and a computer, characterized in that the apparatus, at least on both sides of the winding conveyor (2), is provided in each case with a column (32), which is arranged in a fixed position and in which a shaft (33), which extends at right angles to the longitudinal axis of the winding conveyor (2) above the latter, is rotatably mounted, on which shaft (33) two cutting arms (34) rotatable about their longitudinal axis are arranged at a lateral distance from one another, the device for cutting the rear and front end windings (7; 9) being arranged on the front ends of the cutting arms (34), which cutting device has two top blades (35), which are arranged at a lateral distance from one another, and insertion tips (36), a bottom blade (37) arranged in a stationary position below the top edge of the winding conveyor (2) being assigned to each top blade (35), a top blade (35) being arranged on each cutting arm (34), and the lateral distance between the top blades (35) corresponding to the length of the test piece (40) cut out of the end windings (7; 9).
9. Apparatus according to Claim 8, characterized in that the two cutting arms (34) are arranged on the shaft (33) in such a way as to be offset from one another in the direction of rotation by a range of 6° to 19°.
10. Apparatus according to Claims 8 and 9, characterized in that each top blade (35.1; 35.2) is in cutting connection with bottom blades (37.1; 37.2; 37.3; 37.4) arranged on each of its two sides, the bottom blades (37.1; 37.2) assigned to the first top blade (35.1) and the bottom blades (37.3; 37.4) assigned to the second top blade (35.2) in each case being arranged offset from one another by a vertical range of c; g = 0.2 d to 0.8 d.
11. Apparatus according to Claim 8, characterized in that the apparatus in each case has a device (30) for cutting off the rear end windings (7) of the front winding layer in the conveying direction, which device (30) has cutting arms (34) which rotate clockwise, and a device (31) for cutting off the front end windings (9) of the rear winding layer in the conveying direction, which device (31) has cutting arms (34) which rotate anticlockwise, the said cutting arms (34) being arranged at a predetermined distance from one another along the winding conveyor (2).
12. Apparatus according to Claim 11, characterized in that a sensor (3; 3') is assigned to each device (30; 31).

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