EP1562723B1 - Device and method for machining workpieces - Google Patents

Description

The invention relates to a device and a method for processing a band-shaped or plate-shaped metallic workpiece, in particular for removing the oxide layer of cut surfaces and / or cut edges of the workpiece.

An apparatus and a method for processing a metal strip is known from DE 197 39 895 C2 known.

In the laser cutting of metallic workpieces, an oxide layer or an oxide skin is formed at the cut edges and at the cut surfaces. A disadvantage of the oxide layer is that a paint or zinc coating applied to it bounces off relatively quickly. For this reason, the metallic workpieces are ground off before painting and galvanizing.

A disadvantage when grinding the cut surfaces or cut edges, i. When removing the oxide layer of the same - this process is also referred to as descaling - is that this sharpened the cutting edges, resulting in an increased risk of injury results. The cut edges must therefore be defused again after grinding if necessary.

The generic document shows a method and apparatus for removing the oxide skin on metal blanks. The metal blank is used to remove the oxide layer passed from the cut surfaces between paired, rotating, machining tools. Although the outer cut surfaces of the oxide layer can be cleaned by this method, it is not possible to remove the oxide layer from inner cut surfaces, for example from recesses or similar openings in the workpiece. In addition, the metal blank must be fed to a further processing device, if the surface or the main surface of the workpiece to be cleaned or cleaned.

A disadvantage of the device of the generic document is also the handling, and the cost-intensive design and high space requirements. In addition, the processing tools use uneven, since it is generally assumed that the metal blanks to be descaled always in the same area, i. in the same place, so that one part of the machining tool never comes into contact with the metal blank, while another part of the machining tool is subject to permanent wear.

Devices for deburring and fine grinding are also known from the general state of the art. Here, both rollers and plate-shaped, rotating brush tools are used. In the known devices, the workpiece to be machined is placed on a horizontal working plane or a conveyor belt and performed under the roller or the rotary brush tool by hand or automatically. As with the device described in the generic document has the disadvantage that in general the workpieces always on the same Place be inserted so that an uneven wear of the roller or the brush tools. Such machines can for example have a working width of 1 to 2 m, but in practice usually equipped with smaller metal blanks. This has the consequence that a roll with for example 2 m in length is only claimed on the first 50 cm of its length of metal blanks and thus wears only in this area. The roller must be replaced as soon as this area is worn out too much, although three quarters of the roller surface is still well preserved and usable. An exchange is therefore unavoidable, since when introducing a large workpiece now no longer grind the first 50 cm of the roller. The uneven wear of the roller and the resulting different pressure on the workpiece result in inferior grinding results. On the quality of deburring or grinding also has a negative effect that the brush or the roller is not infinitely adjustable in their penetration depth. An inherently meaningful, deep penetration of the bristles is prevented by the conveyor belt on which the workpiece lies, as this should not be damaged.

A disadvantage of the known deburring and grinding machines is also that the workpiece must be inserted twice so that both main surfaces of the workpiece can be edited. Another disadvantage of the known machines is the high drive power, the high space requirement and the high acquisition and maintenance costs. The basic surfaces of the machines are dimensioned so that even the largest workpieces can be inserted and processed flat. As a result, when the machine is intended for the processing of 2 x 2 m large pieces of metal, the base requires at least such a space requirement. Added to this is the space required for placing and aligning the piece of metal prior to insertion into the machine and for removal.

Another disadvantage of the known grinding machines is that they are either suitable for cleaning or finely grinding the main surfaces of the workpiece or, like the device of the generic type, for descaling the peripheral edge of the workpiece. Moreover, apart from manual processing, no solutions are known which desalinate internal recesses, holes, apertures and the like.

Furthermore, expensive and expensive wet grinding methods are known from the prior art.

From the US 2,989,764 For example, two circulating processing units each processing one side of a workpiece are known.

From the DE 42 13 342 A1 and the DE 199 55 066 C2 For wiping dirt and dust from surfaces of plate-shaped workpieces two circumferential wiping elements are known, wherein each wiping element wipes one side of a plate-shaped workpiece. The wiping elements work transversely to the feed direction of the workpiece.

From the DE 100 11 064 A1 a device for cleaning surfaces with endless circulating cleaning tapes is known, which is transverse to the passage direction of the cleaned Circulating workpiece. It can be provided that a device acts from above and a device from below on the workpiece.

The present invention has for its object to solve the above-mentioned disadvantages of the prior art, in particular a fast, simple and inexpensive device and a method for processing strip or plate-shaped metallic workpieces, in particular for removing the oxide layer of cut surfaces and / or cut edges to create the same.

This object is achieved by claim 1.

A method for processing a metallic workpiece results from claim 35.

Since the brush does not remain rigidly in one position due to the arrangement on a circulating conveyor, but is guided along the entire length which is present for the passage of the workpiece, a uniform wear of the at least one brush is ensured. The workpiece can be carried out in a simple manner obliquely, preferably transversely to the direction of rotation of the brush or pulled through, so that the workpiece is processed uniformly by the brush.

Due to the linear course of the brush in the region of the workpiece to be machined, as the inventor has surprisingly found, ensures that the brush penetrates into all recesses or holes of the workpiece and thus the oxide layer at all cutting surfaces and Cut edges removed. The brush thus moves obliquely or transversely to the feed direction of the workpiece along the workpiece and, similar to a brush, which is pulled along on a metal piece, penetrates into each recess.

Advantageously, with the device according to the invention both the surfaces, i. the main surfaces of the band- or plate-shaped metal workpieces machined, as well as the cut surfaces and cut edges descaled. Simultaneous descaling of the cut surfaces and cut edges and cleaning of the surfaces was not possible with the previously known devices.

It is advantageous if two conveyors are provided, between which the workpiece obliquely or transversely to the direction of rotation is feasible such that each conveyor with the associated brushes processed one of the two main surfaces of the workpiece.

In a particularly advantageous manner, both main surfaces of the workpiece are thereby processed with one operation. In addition, the cut edges and the cut surfaces are processed from both sides, so that a very thorough descaling takes place. The use of two conveyors allows a fast and rational machining of the workpiece.

According to the invention, it can further be provided that the conveying devices have a plurality of brushes arranged at a distance from one another.

As the inventor has found out in a non-obvious manner, when the conveyor has a plurality of spaced apart brushes, a particularly high-quality and reliable machining of the main surfaces of the workpiece and the cut surfaces and edges. The fact that a distance between the brushes is present, it is avoided that the front lying in the direction of rotation bristles of the brushes have already bent before they reach the workpiece. This was the case with the brushes known from the prior art (for example, in the rotating "plate brush"). If the subsequent bristles are already bent over by the leading bristles, the following bristles can no longer penetrate far enough into recesses and the like, so that they are only insufficiently cleaned.

The distance between the brushes ensures that the brushes each hit unbelted on the workpiece or advantageously penetrate into recesses or holes.

In one embodiment of the invention can be provided that the bristles are corrugated and / or formed rotated.

By a corrugated design of the bristles of the brushes ensures that the bristles are not arranged uniformly in series, but irregular, so that the bristles are on the one hand little affected by lying in the direction of rotation bristles front and on the other, as emerges surprisingly in experiments has achieved a particularly high quality cleaning. Advantageous embodiments and modifications of the invention will become apparent from the other dependent claims and from the embodiments illustrated in principle below with reference to the drawing.

From claim 31 results in a particularly advantageous V-belt and from claim 32 an advantageous carrier with bristles for insertion into the device according to the invention.

Fig. 1

eine perspektivische Darstellung der erfindungsgemäßen Vorrichtung mit zwei Fördereinrichtungen;

Fig. 2

eine Vorderansicht der erfindungsgemäßen Vorrichtung gemäß Fig. 1 mit zwei Fördereinrichtungen;

Fig. 3

eine Draufsicht auf die erfindungsgemäße Vorrichtung gemäß Pfeilrichtung III der Fig. 2;

Fig. 4

eine Seitenansicht der erfindungsgemäßen Vorrichtung gemäß Pfeilrichtung IV der Fig. 2;

Fig. 5

eine perspektivische Darstellung der erfindungsgemäßen Vorrichtung mit einem Gehäuse;

Fig. 6

eine Prinzipdarstellung eines zu bearbeitenden Werkstücks und einer im wesentlichen vertikal verlaufenden Fördereinrichtung mit mehreren jeweils auf Trägern angeordneten Bürsten;

Fig. 7

eine perspektivische Darstellung eines Ausschnitts eines Keilriemens mit einem Träger und eingeschossenen Borsten;

Fig. 8

eine Ansicht eines Teiles eines Keilriemens gemäß Pfeilrichtung VIII der Fig. 7;

Fig. 9

eine Draufsicht auf einen Teil eines Keilriemens gemäß Pfeilrichtung IX der Fig. 8;

Fig. 10a bis 10d

verschiedene Ausführungsformen des Keilriemens;

Fig. 11

eine perspektivische Darstellung eines Ausschnitts eines Keilriemens mit einer Ausbildung des Trägers aus freistehend angeordneten Segmenten;

Fig. 12

eine perspektivische Darstellung von einzelnen Segmenten des Trägers, wobei die Segmente mittels einer Nut/Feder-Verbindung zusammensteckbar sind;

Fig. 13

eine Seitenansicht eines Segments des Trägers mit schräg gestellten Borsten;

Fig. 14

eine Seitenansicht eines Segments des Trägers mit schräg gestellten Borsten und einem stabilisierenden Stützborsten;

Fig. 15

eine perspektivische Darstellung eines Segments des Trägers mit einem Bündel von Borsten und einer stabilisierenden Ummantelung;

Fig. 16

eine perspektivische Darstellung eines Ausschnitts eines Keilriemens in einer zu Fig. 7 alternativen Ausführungsform mit freistehend angeordneten Segmenten, die mit schräg stehenden Borsten versehenen sind;

Fig. 17

ein Ausschnitt der Fördereinrichtung in Umlaufrichtung nach einer Umlenkstelle mit einem als Stahlrolle ausgebildeten Widerstandselement; und

Fig. 18

eine Seitenansicht der erfindungsgemäßen Vorrichtung mit vier im wesentlichen horizontal verlaufenden Fördereinrichtungen.

It shows:

Fig. 1

a perspective view of the device according to the invention with two conveyors;

Fig. 2

a front view of the device according to the invention according to Fig. 1 with two conveyors;

Fig. 3

a plan view of the device according to the invention in the direction of arrow III of Fig. 2 ;

Fig. 4

a side view of the device according to the invention in the direction of arrow IV of Fig. 2 ;

Fig. 5

a perspective view of the device according to the invention with a housing;

Fig. 6

a schematic representation of a workpiece to be machined and a substantially vertically extending conveyor with a plurality of each arranged on carriers brushes;

Fig. 7

a perspective view of a section of a V-belt with a carrier and shot bristles;

Fig. 8

a view of a part of a V-belt according to arrow VIII of the Fig. 7 ;

Fig. 9

a plan view of a part of a V-belt according to the direction of arrow IX of Fig. 8 ;

Fig. 10a to 10d

various embodiments of the V-belt;

Fig. 11

a perspective view of a section of a V-belt with a design of the carrier of freestanding arranged segments;

Fig. 12

a perspective view of individual segments of the carrier, wherein the segments are joined together by means of a tongue and groove connection;

Fig. 13

a side view of a segment of the carrier with inclined bristles;

Fig. 14

a side view of a segment of the carrier with inclined bristles and a stabilizing support bristles;

Fig. 15

a perspective view of a segment of the carrier with a bundle of bristles and a stabilizing sheath;

Fig. 16

a perspective view of a section of a V-belt in a to Fig. 7 alternative embodiment with freestanding segments, which are provided with inclined bristles;

Fig. 17

a section of the conveyor in the direction of rotation after a deflection with a designed as a steel roller resistance element; and

Fig. 18

a side view of the device according to the invention with four substantially horizontally extending conveyors.

Fig. 1 shows an apparatus for processing a band- or plate-shaped metal workpiece 1 (in Fig. 3 and Fig. 6 exemplified). The device according to the invention is particularly suitable for removing the oxide layer from cut surfaces 1b and / or cut edges 1a of the workpieces 1. Both circumferential cut surfaces 1b and cut edges 1a of the workpiece 1 and cut surfaces 1b and cut edges 1a of recesses, holes or the like can be used the workpiece 1 are descaled. In experiments, it has been found that small holes generally do not have to be descaled, since they usually serve as screw holes and therefore painting or galvanizing is not absolutely necessary.

By means of the device according to the invention, workpieces 1 can be cleaned so advantageously of oxide layers or of impurities on the two main surfaces 1c or the surface of the workpiece 1 that a reliable and permanent coating or galvanizing is possible without a later spalling of the applied layer must be feared.

How out Fig. 1 and 2 it can be seen, the device according to the invention has two conveyor devices 2, which are each provided with brushes 3. The conveyors 2 guide the brushes 3 at least approximately linearly in the area of the workpiece 1 to be machined. The workpiece 1 to be machined is carried out or pulled through transversely to the direction of rotation of the conveyors 2 between the two conveyors 2. For this purpose, the inventive Device a guide channel 4, which also off Fig. 3 it is apparent.

Depending on the thickness of the workpiece 1 to be machined, the guide channel 4 can be adjusted by means of an adjusting device 5. For convenient passage of the workpiece 1, the device according to the invention has a sheet metal insert 6, through which the workpiece 1 can be introduced into the guide channel 4. After passing through the guide channel 4 or after passing through the two conveyors 2, the workpiece 1 is discharged onto a storage table 7. To push through the workpiece 1, a push plate or the next subsequent workpiece 1 may be provided.

The delivery table 7 can have a vertical stop, which ensures that the workpiece 1 after delivery from the guide channel 4 in a defined direction can fall or be folded over (see Fig. 4 ).

The guide channel 4 is also designed to guide the brushes 3 so that they are moved along the workpiece 1 in a defined manner and can not escape.

In addition to the adjusting device 5, the device according to the invention has an independent feed 8, by means of which the depth of engagement of the brushes 3 can be varied. This is particularly advantageous for correcting the wear of the brushes 3 or for increasing the pressure. In the embodiment shown in the embodiment with two conveyors 2, these are moved to adjust the wear of the brush 3 to each other or adjusted. In a particularly simple embodiment of the invention Solution, with only one conveyor 2, this is moved to a fixed wall of the guide channel 4, which serves as a counter-holder or as a replacement for the second conveyor 2 in this case, or adjusted. Of course, in this embodiment, an adjustment of the guide channel 4 may be provided in the direction of the conveyor 2.

In the embodiment, it is provided that the adjusting device 5 and the delivery 8 are formed with spindles. In a manner not shown, the spindles of the adjusting device 5 and the delivery 8 can be connected via a respective chain and provided with a worm gear.

How out Fig. 1 and Fig. 3 it can be seen, the conveyors 2 are arranged slightly offset from one another in the direction of passage of the workpiece 1. The offset in the direction of passage may be, for example, 10 to 100 mm, preferably 30 mm. Thus, on the one hand it is ensured that the respective brushes 3 of the conveyor 2 do not interfere with one another, on the other hand a uniform and balanced pressure of the brushes 3 of the conveyors 2 is ensured, which compensates each other, so that the workpiece 1 does not tend to tilt ,

In an embodiment not shown, in which four conveyors 2 are provided, it has also been found to be advantageous to arrange them accordingly offset.

In the illustrated solution according to the invention is a variant in which the conveyors 2 are arranged standing, so that the brushes 3 of the conveyor 2 in the region of the workpiece are substantially vertical.

Alternatively, the solution according to the invention, in a manner not shown, be provided with horizontally arranged conveyors 2, so that the brushes 3 are arranged in the region of the workpiece 1 extending substantially horizontally. In this case, it is expedient to reinforce the spindles of the adjusting device 5 or the infeed 8, which must at least partially accommodate the weight of the device in the horizontal state, by means of counter roller bearings.

In the embodiment according to Fig. 1 to Fig. 5 with the two standing arranged conveyors 2, the direction of rotation of the conveyors 2 is selected such that the brushes 3 of both conveyors 2 in the same direction on the two main surfaces 1c of the workpiece are fed past. This is off Fig. 2 illustrated by the direction of the conveyor 2 with the four arrows shown. Through this direction of rotation of the conveyor 2 and the brushes 3 an advantageous removal of dirt is guaranteed.

The direction of rotation of the conveyors 2 is, as out Fig. 2 can be seen, selected such that the brushes 3 from top to bottom or toward a in Fig. 4 shown bottom plate 9 are guided past the workpiece 1. This running direction results in a particularly advantageous removal of dirt and high stability Device according to the invention and the workpiece to be machined 1, as this is not uncontrolled moved by the brushes 3, but is pressed firmly and stably on the bottom plate 9.

In a variant of the device according to the invention, in which the conveyors 2 are formed lying, it is advantageous if the direction of rotation of the conveyors 2 is selected such that the brushes 3 along the workpiece 1 in the direction of a boundary plate, which the workpiece 1 at a Front side leads, are passable. Analogous to the contact pressure of the workpiece 1 on the bottom plate 9 in the stationary embodiment of the conveyors 2, the workpiece 1 is thus pressed stably on the boundary plate.

In experiments it has been found that it is advantageous in an embodiment of the device according to the invention with four conveyors 2, when each of the two main surfaces 1c of the workpiece 1 is processed by two counter-rotating conveyors 2. It is to be able to perform the workpiece 1 particularly stable and safe, advantageous if the conveyors 2, as already described, are arranged slightly offset from one another in the direction of passage of the workpiece 1. It is also advantageous if the directions of rotation are chosen such that the brushes 3 of the first conveying device 2 in the direction of passage of the workpiece 1 and the fourth conveying device 2 can be guided in the direction of the bottom plate 9 on the workpiece 1. The second and third conveying means 2 in the direction of passage of the workpiece 1 consequently run in such a way that they are in contact therewith arranged brush 3 in the region of the workpiece 1 to move in opposite directions to the first and the fourth conveyor. This arrangement ensures that the workpiece 1 is pressed by the first conveyor 2 down in the direction of the bottom plate 9, the two next conveyors 2 press the workpiece 1 while upwards, this immediately by the subsequent fourth conveyor 2, which presses the workpiece 1 down again, is corrected. In each case, the first and the third conveyor as well as the second and the fourth conveyor are arranged on one side of the workpiece 1 or on a main surface 1c.

In the horizontal arrangement of four conveyors 2, the selection of the advantageous directions of rotation of the conveyors 2 takes place analogously, wherein the bottom plate 9 is replaced by a limiting plate.

In experiments, it has been found that a circulation speed of the brushes 3 of 5 to 30 m / sec, preferably 15 to 16 m / sec, is particularly advantageous. This speed ensures, on the one hand, a rapid processing of the workpieces 1 and, on the other hand, has proved to be suitable with regard to the reliability of the machining and the loading of the components involved.

In accordance with Fig. 1 to Fig. 5 illustrated embodiment of the device according to the invention with two conveyors 2, it may be necessary that the workpiece 1 is reversed and pushed through again. This is when looking at the Fig. 6 simply conceivable, since the brush 3 of course facing the direction of rotation Sand side surfaces 1b and side edges 1a better than the side surfaces 1b and side edges 1a, which are oppositely oriented (so to speak, in the "slipstream" lie).

In accordance with Fig. 18 illustrated variant of the solution according to the invention with four conveyors 2, in which each two conveyors 2 brush to the right and two to the left, turning over and re-pushing the workpiece 1 is not necessary. In the embodiment of the inventive solution with four conveyors 2, the workpiece is finished with a single push through.

In a further variant of the solution according to the invention, which is likewise not shown, an automatic feed for carrying out the workpieces 1 can be provided.

In experiments it has been found that an independent drive for each conveyor 2 is particularly useful and beyond can be realized easily and inexpensively. In the embodiment, two electric motors 10 are used for driving the conveyors.

Fig. 5 shows the device according to the invention with a housing 11. Both the sheet metal insert 6 and the storage table 7 can be designed to be height adjustable. It can also be provided that the width of the sheet metal insert 6 and / or the tray table 7 is adjustable.

From the FIGS. 7 to 9 are individual bristles 12 of the brush 3 recognizable. The bristles 12 are in a simplified Presentation straight running. In an advantageous embodiment, however, it can be provided that the bristles 12 are corrugated or rotated, so that the bundles 120 formed by the bristles 12 resemble a scrubby brush or a tuft.

In the embodiment according to Fig. 7 to 9 the conveyor 2 is provided with a V-belt 13. As an alternative to the V-belt 13 may also be a toothed belt, a flat belt with knobs, a chain, a belt or the like may be provided. The V-belt 13 is formed in the illustrated embodiment as a "triple" V-belt 13 with two outer V-belts 13b, 13c and a central V-belt 13a. The middle V-belt 13 a is provided for receiving the brushes 3.

The V-belt 13 may be formed of rubber, plastic, synthetic rubber or preferably neoprene. It can generally be provided that the brushes 3 or the bristles 12 are glued, cast, bolted, punched or welded to the V-belt 13. In the exemplary embodiment, it is provided that a PU cover layer (polyurethane) 14 is applied to the V-belt 13. Thus, a support 15 preferably formed of rubber or plastic (e.g., neoprene) for the brush 3 and the bristles 12, respectively, can be easily welded. The result is an advantageous and reliable connection. The PU layer 14 may have a thickness of 1 to 5 mm, preferably 2 mm.

The V-belt 13 can with several individual brushes 3 ( Fig. 6 ) or with a single V-belt 13 completely covering brush 3 ( Fig. 17 ) be provided.

The bristles 12 can be shot in bundles 120 in the carrier 15. A secure and reliable connection of both the carrier 15 with the V-belt 13 and between the carrier 15 and the shot bundles 120 is ensured. A reliable connection is essential due to the high number of revolutions and the forces involved. As a result, high brushing speeds can be used. The design of the conveyor 2 as a belt drive with a V-belt 13 is smooth and reliable.

For advantageous shooting of the bristles 12 and the bundles 120, the bristles 12 may be provided with not shown barbs. The V-belt 13 is formed in the embodiment as a so-called power band. It has been found in experiments that the outer two V-belts 13b, 13c sufficient to drive, so that the central V-belt 13a can be easily used to accommodate the bristles 12.

As is clear from the FIGS. 7 to 9 shows, the carrier 15 is provided transversely to the direction of rotation of the conveyor 2 and the V-belt 13 with slots 16. Alternatively, the carrier 15, in a manner not shown, also be formed of individual segments in similar dimensions. It can be provided that 16 portions 15a of the carrier 15 are formed by the slots, which have a length of 10 to 40 mm. In the exemplary embodiment, it is provided that both the length and the width of the sections 15a is 18 mm. Each section 15 a takes on a bundle 120 of the Bosten 12. Each form three sections 15a together, a brush 3. Of course, here are other combinations conceivable, for example, two or four sections 15a taken together can form a complete brush 3. The number of bristles 12 per bundle 120 is not limited to the illustrated number, but it is intended to combine a plurality of bristles into a bundle 120.

As also from the FIGS. 7 to 9 results, between the bristles formed by the bundles 120 120 of a V-belt 13, two bristle-free sections 15 a arranged. Again, another number is conceivable. Due to the distance which is created due to the bristle-free sections 15a between the brushes 3, it is ensured that a domino effect, ie that the front bristles 12 in the circumferential direction already reverse the following bristles 12 before they reach the workpiece 1 and thus the trailing bristles 12 can no longer upright, is avoided.

The fact that the carrier 15 is divided by the slots 16 into sections 15a, results in a particularly small bending radius, so that the entire device can be made to save space and cost.

According to the invention, it can be provided that the length of the bristles 12 is 30 to 90 mm, preferably 60 mm.

The carrier 15 may be formed of the same material as the V-belt 13. In this case, various embodiments are conceivable which are suitable for shooting in the bristles 12 are and can be reliably welded to the PU cover layer 14.

From the FIGS. 10a to 10d Various advantageous embodiments of the V-belt 13 can be seen. The V-belts 13 according to Fig. 10a to Fig. 10d in this case have elevations or projections 17 on their upper side to be provided with the carrier 15, which are intended to guide or support the carrier 15. Fig. 10a in this case shows a triangular-shaped projection 17 in cross-section, which runs parallel to the central V-belt 13a. The with the V-belt 13 according to Fig. 10a To be connected carrier 15 in this case preferably has a projection 17 corresponding recess, whereby a particularly reliable connection between the carrier 15 and the belt 13 is formed.

Fig. 10b shows a particularly preferred embodiment of the V-belt 13, which also in Fig. 11 is shown. The V-belt 13 according to Fig. 10b in this case has two projections 17, which laterally guide or support the carrier 15. The width of the carrier 15 and the distances between the projections 17 are preferably matched to one another.

Fig. 10c shows one too Fig. 10a alternative embodiment of the projection 17, which also extends parallel to the central V-belt 13a. By means of the projection 17, a groove / spring connection between the carrier 15 and the V-belt 13 is provided.

Fig. 10d shows one too Fig. 10b simplified design of the V-belt 13, in which the carrier 15 only at one Side is guided or stabilized by a projection 17. As has been found in experiments, already sufficient lateral projection to achieve an improvement in the connection between the carrier 15 and the belt 13.

The projections 17 according to the FIGS. 10a to 10d advantageously prevent rotation or rotational movement of the carrier 15.

The in the FIGS. 10a to 10d shown V-belt shapes can be easily and inexpensively manufactured and provide an additional positive connection of the carrier 15 with the V-belt 13th

Fig. 11 shows the V-belt 13 on which a preferably made of rubber or plastic carrier 15 is screwed, riveted, glued, welded or clipped. The carrier 15, which serves to receive the brush 3 or the bristles 12, is composed of segments 15b, two of which are exemplified in FIG Fig. 11 are shown. The distance between the segments 15b in the exemplary embodiment is 3 to 20 mm, preferably 6 to 10 mm. Of course, the segments 15b may be arranged without clearance or at a greater distance.

Fig. 12 shows an advantageous embodiment of the segments 15b. The segments 15b each have at one end a groove 18 and at the other end a spring 19, by means of which the segments 15b are connectable to each other. A rotation of the segments 15b is prevented by the groove / spring connection in a simple and advantageous manner.

The segments 15b are for clarity in 11 and FIG. 12 shown without inserted bristles 12.

Fig. 13 shows a segment 15b and a portion 15a of a carrier 15 with inserted bristles 12. The bristles 12 of the brush 3 are at most up to 45 °, preferably inclined by 15 ° in the direction of rotation. That is, the tips of the bristles 12 are in the direction of rotation in front of the correspondingly opposite end of the bristles, which is connected to the carrier 15. As has been found in experiments, penetrate the inclined by 15 ° bristles 12 penetrate particularly advantageous in recesses of the workpiece 1, resulting in a particularly advantageous removal of the oxide layer of cut surfaces 1 b and cut edges 1 a of the workpiece 1 results. Of course, an inclination of the bristles beyond 45 ° is also possible, however, this possibly leads to tilting and damage to the bristles 12 when they penetrate into the recesses of the workpiece 1.

Fig. 14 shows a modification of the in Fig. 13 As has been found in experiments, the support bristle 20 stabilizes the inclined bristles 12 and thus improves the penetration in recesses of the workpiece 1 or ensures a uniform descaling. In an advantageous embodiment, the support bristle 20 is shorter than the bristles 12. A vertical or rectangular arrangement of the support bristle 20 relative to the surface of the support 15 or the surface of the segments 15b is advantageous for stabilizing or supporting the bristles 12 exposed. The compound of the support bristle 20 with the Carrier 15 can be carried out analogously to the connection of the bristles 12 to the carrier 15.

In the FIGS. 13 and 14 shown bristles 12 of the brush 3 may be formed in an advantageous manner as roped bristles and / or abrasive bristles. This has been found in experiments to be particularly suitable.

Fig. 15 shows a segment 15b of the carrier 15 with a bundle 120 of the bristles 12, which is surrounded by a jacket 21 stabilizing or supporting. The sheath 21 serves as an alternative to the use of support bristles 20. The sheath 21 extends as in Fig. 15 from the lower end of the bristles 12 to approximately the middle of the bristles 12. This has been found to be particularly suitable for stabilization, without the risk that the sheath in contact with the workpiece 1 device.

Fig. 16 shows a V-belt 13 with an array of segments 15b according to Fig. 11 , wherein the segments 15b with 15 ° inclined bristles 12 according to Fig. 13 are provided. This is a particularly preferred embodiment.

Fig. 17 shows a section of a conveyor 2 in the direction of rotation after a deflection point 22 before the brush 3 and the bristles 12 come back into contact with the band or plate-shaped metal workpiece 1. In this area, a resistance element 23 is arranged. The deflection point 22 is for clarity in Fig. 2 shown. Under deflection 22 is the place to understand in which the V-belt 13, is deflected due to the rollers, rollers or the like driving the V-belt 13. The direction in which the V-belt 13 moves is opposite before or after the deflection point 22. The inventor has found out in a non-obvious way that the bristles 12 buckle in the direction of rotation after the deflection point 22 and later erect again in the intended manner, preferably 15 ° inclined. The buckling of the bristles 12 takes place in the region in which the brush 3 or its bristles 12 leave the circular path of the deflection point 22 and move into a linear or straight-line movement. The buckling of the bristles 12 results essentially from the fact that the circular path of the deflection point 22 is left, the bristles 12, however, still bring a corresponding momentum, which leads to a bending movement to the front.

The inventor has recognized that this buckling forward by a resistance element 23 can be prevented. Preferably, the resistance element 23 may be formed mechanically as a steel roll, which can be introduced into the path of the brush 3 in such a way that the tips of the bristles 12 strike against it and thereby break the momentum causing the buckling of the bristles 12. The steel roller 23 can, as in Fig. 17 shown, on a plate 24 may be arranged, which in turn is preferably pivotally mounted on a (not shown) fixed housing part.

In a horizontal embodiment of the device according to the invention, in which the bristles 12 project upwards in the region of the workpiece 1 to be machined, the steel roller can 23 with the plate 24 are easily placed on the tips of the bristles 12, wherein the weight of the steel roller 23 and the plate 24 is sufficient for pressing. In other arrangements, or when the bristles 12 project downwards in the direction of the workpiece 1 to be machined, the necessary contact pressure can be generated in a simple manner, for example via springs, not shown, in a simple manner.

Because a buckling of the brushes 3 or their bristles 12 is prevented by the resistance element 23, a uniform and exact machining of the workpiece 1 is possible. Instead of a steel roller 23, any other resistance element can be introduced into the path of the circulating bristles 12, so that the bristles 12 abut accordingly and the momentum is reduced. In an alternative and not shown embodiment, the resistance element 23 may also be formed as a magnet which is arranged in the region of the deflection point 22 such that buckling of the bristles 12 is prevented by the magnetic force of the magnet. An advantageous arrangement of the magnet in the region in which the bristles 12 buckle after leaving the circular path. It may be advantageous if the magnet is shortly before this area, i. behind in the circumferential direction, is arranged so that the magnetic force acts on the bristles 12 at an early stage and this retracts and thus counteracts the buckling.

Fig. 18 shows a particularly preferred embodiment of the device according to the invention with four conveyors 2. The preferred arrangement of the conveyors 2 in terms their direction of circulation has already been dealt with above. Likewise, regarding the Fig. 18 no longer to the preferred embodiments, which also in particular in the FIGS. 10 to 17 were dealt with. Fig. 18 shows the device according to the invention only schematically, wherein the representation has been reduced to the parts essential to the invention. Fig. 18 shows the device according to the invention in a horizontal state, ie, the workpiece 1 is placed horizontally and pushed through.

For laying the workpiece 1, as already described, a sheet metal insert 6 is used to output the workpiece 1, a tray table 7 is provided. Between the second and the third conveyor 2 there is a bottom plate 9, which serves to stably pass the workpiece 1 through the device. The sheet tray 6, the tray table 7 and the bottom plate 9 are in the in Fig. 18 Embodiment shown formed as a table elements whose parallel to the feed direction of the workpiece 1 extending side edges are formed as a perforated plate for receiving rollers 25 and rollers. Because the table elements 6, 7, 9 are provided with a roller system, the workpiece 1 can be pushed through the device in a particularly simple manner transversely to the conveyor devices 2. In contrast to a rubber conveyor belt, the roller system is much more robust and unsusceptible to damage caused by tilting of the workpiece 1.

For performing the workpiece 1, the in Fig. 18 illustrated apparatus according to the invention also three feed rollers 26. The feed rollers 26 are made in the embodiment from a metallic base body, which is provided with a rubber coating. In a preferred, unspecified embodiment, the rubber coating on a profile or a corrugation, for example, a cross pattern on. In this case, other patterns, such as those known from tire profiles, can be used. The casing of the main body of the feed roller 26 may be made of rubber or plastic. By the feed rollers 26 a uniform and reliable transport of the workpiece 1 is ensured transversely to the directions of rotation of the conveyors 2.

In the feed direction of the workpiece 1 behind the bristles 12 is as out Fig. 18 can be seen, a brush guide 27 is arranged to prevent the brushes 3, due to the feed movement of the workpiece 1, to bend backwards or be moved. As a brush guide 27 is in a special way a sliding plastic, especially an abrasion-resistant plastic, such as the designated as S green special plastic.

Thus, it is easily prevented that the brushes 3 or their bristles 12 to the rear, i. in the direction of feed of the workpiece 1, slide away.

In experiments, it has been found that a particularly advantageous guidance of the V-belt 13 results from the fact that at a distance of preferably 100 mm support rollers 28 are arranged. The support rollers 28 prevent the V-belt 13 from being pushed away from the workpiece 1 to be machined. For this purpose, a distance of the support rollers 28 to each other of 100 mm has been found to be sufficient.

For reasons of simplification, is in Fig. 18 neither the belt nor a motor shown. Shown, however, is a carrier 29 for the engine and the belt. By the in Fig. 18 illustrated solution according to the invention with four conveyors 2, it is possible to work the workpiece 1 in one go completely. A re-insertion of the workpiece 1 is not necessary. The speed at which the brush 3 or the bristles 12 are guided along the workpiece 1 is preferably 15 to 16 m / sec.

Unspecified technical details regarding the in Fig. 18 The embodiment shown in FIG FIGS. 1 to 5 described standing embodiment of the device according to the invention.

The solution according to the invention can be produced with different processing lengths or different widths for the import of workpieces 1.

Claims (34)

1. A device for abrading and/or removing the oxide layer from cut surfaces and/or cut edges of a metal workpiece in strip or plate form, wherein four rotating conveyor devices (2) are provided, each equipped with at least one brush (3), wherein the conveyor devices (2) guide the at least one brush (3) approximately linearly in the region of the workpiece (1) to be machined along the entire length available for feeding-through the workpiece (1), at an angle or transversely to the feed direction of the workpiece (1), and wherein the conveyor devices (2) are arranged in such a way that two counter-rotating conveyor devices (2) are associated with each of the main surfaces (1 c) of the workpiece (1), wherein the conveyor devices are arranged slightly offset in the throughput direction so that the respective brushes of the conveyor devices do not impede one another.
2. A device according to Claim 1,
   characterised in that the conveyor devices (2) are arranged slightly offset from one another, preferably by 10 to 100 mm, in the throughput direction of the workpiece (1).
3. A device according to Claim 1 or 2,
   characterised in that, with an arrangement of four conveyor devices (2), the direction of rotation of the first conveyor device (2) and the fourth conveyor device (2) as seen in the throughput direction of the workpiece (1) is selected such that the brushes (3) can be guided past the workpiece (1) in the direction of a base plate (9) or a limit plate.
4. A device according to one of Claims 1 to 3,
   characterised in that the at least one conveyor device (2) has a plurality of brushes (3) arranged at a mutual spacing.
5. A device according to one of Claims 1 to 4,
   characterised in that a guide channel (4) is provided, which can be adjusted to the size of the workpiece (1) and by means of which the workpiece (1) can be displaced such that it is guided transversely to the direction of rotation of the at least one guide device (2).
6. A device according to one of Claims 1 to 5,
   characterised in that the conveyor devices (2) are mutually displaceable or adjustable, preferably for correcting wear on the at least one brush (3).
7. A device according to one of Claims 1 to 6,
   characterised in that the bristles (12) of the brush (3) extend in wavy and/or twisted manner.
8. A device according to one of Claims 1 to 7,
   characterised in that the bristles (12) of the brush (3) are designed as intertwined bristles and/or abrasive bristles.
9. A device according to Claim 1,
   characterised in that the bristles (12) of the brush (3) are angled up to 45°, preferably through 15°, in the direction of rotation.
10. A device according to Claims 7, 8 or 9,
    characterised in that the brush (3) is provided with supporting bristles (20) for supporting or stabilising the bristles (12).
11. A device according to Claim 8 or 9,
    characterised in that a bundle (120) of the bristles (12) is surrounded in stabilising or supportive manner in each case by a sheath (21).
12. A device according to one of Claims 1 to 11,
    characterised in that the brush (3) or the bristles (12) of the brush (3) are glued, moulded, screwed, punched or welded to the respective conveyor device (2).
13. A device according to one of Claims 1 to 12,
    characterised in that the rotational speed of the brush (3) is 5 to 30 m/sec, preferably 15 to 16 m/sec.
14. A device according to one of Claims 1 to 13,
    characterised in that each conveyor device (2) has an independent drive, preferably an electric motor (10).
15. A device according to one of Claims 1 to 14,
    characterised in that the conveyor device (2) is provided with a V-belt (13) or a toothed belt or a flat belt with nubs or a chain.
16. A device according to one of Claims 1 to 15,
    characterised in that the conveyor device (2) is constructed with a triple V-belt (13a, 13b, 13c), wherein the central V-belt (13a) is provided for receiving the brushes (3).
17. A device according to Claim 15 or 16,
    characterised in that the V-belt (13) is made from rubber and/or plastic material or synthetic rubber, preferably neoprene.
18. A device according to Claim 15, 16 or 17,
    characterised in that a PU cover layer (14) is applied to the V-belt (13) and a carrier (15) for the brush (3) or the bristles (12), which is preferably made from rubber or plastic material, is welded to the PU cover layer (14).
19. A device according to Claim 15, 16 or 17,
    characterised in that a carrier (15) for the brush (3) or the bristles (12), which is preferably made from rubber or plastic material, is screwed, riveted, glued, welded or clipped onto the V-belt (13).
20. A device according to Claim 19,
    characterised in that the V-belt (13) has raised portions or projections on its upper side, which is provided for connection to the carrier (15), which raised portions (17) or projections guide or support the carrier.
21. A device according to Claim 18, 19 or 20,
    characterised in that the bristles (12) are injected into the carrier (15) in bundles (120).
22. A device according to one of Claims 18 to 21,
    characterised in that the carrier (15) is formed by individual segments (15b), wherein the segments (15b) have a length of 10 to 40 mm, preferably 18 mm.
23. A device according to Claim 22,
    characterised in that the segments (15b) each have a groove (18) at one end and a tongue (19) at the other end, by means of which the segments (15b) can be connected to one another.
24. A device according to Claim 23 or 24,
    characterised in that two to four, preferably three, mutually adjoining segments (15b) or portions (15a) are each provided with bristles (12) and together form a brush (3).
25. A device according to Claim 24,
    characterised in that one to three, preferably two, bristle-free segments (15b) or portions (15a) are arranged between the brushes (3) of a V-belt (13).
26. A device according to Claim 21 or 22,
    characterised in that the portions (15a) or the segments (15b) are arranged at a spacing or separately from one another, wherein the spacing is 3 to 20 mm, preferably 6 to 10 mm.
27. A device according to one of Claims 1 to 26,
    characterised in that, in the direction of rotation, a resistance element (23) is arranged after a deflection point (22) of the conveyor device (2), before the brush (3) or the bristles (12) come back into contact with the strip- or plate-shaped metal workpiece (1).
28. A device according to Claim 27,
    characterised in that the resistance element (23) is arranged in the region in which the brush (3) or its bristles (12) leave the circular path specified by the deflection point (22) of the conveyor device (2) and pass over into a linear or straight movement.
29. A device according to Claim 27 or 28,
    characterised in that the resistance element (23) prevents a buckling of the bristles (12) in the direction of rotation mechanically, preferably as a steel roller, or magnetically.
30. A device according to Claim 29,
    characterised in that the steel roller (23) can be moved into the path of the brush (3) or the bristles (12) in such a way that the tips of the bristles (12) strike against it.
31. A device according to one of Claims 1 to 30,
    characterised by a V-belt (13), which has bristles (12) arranged directly on an upper side or by way of a carrier through adhesion, moulding, screwing, punching or welding, wherein the bristles (12) are angled in the direction of rotation and the angle is up to 45°, preferably 15°.
32. A device according to one of Claims 1 to 31,
    characterised by a carrier (15b) which is provided with bristles (12) arranged in bundles, and the bristles (12) are angled in the direction of rotation, wherein the angle is up to 45°, preferably 15°.
33. A device according to Claim 32,
    characterised in that the carrier (15b) has a groove (18) at one end and a tongue (19) at the other end, by means of which the carriers (15b) can be connected to one another.
34. A process for abrading and/or removing the oxide layer of cut surfaces and/or cut edges of a metal workpiece in strip or plate form, according to which four rotating conveyor devices (2), each provided with at least one brush (3), are driven in such a way that each main surface (1 c) of the workpiece (1) has two counter-rotating conveyor devices (2) associated therewith which guide the brushes (3) past the workpiece (1) along the entire length available for feeding-through the workpiece (1), at an angle or transversely to the feed direction of the workpiece (1), wherein the conveyor devices are arranged slightly offset in the throughput direction so that the respective brushes of the conveyor devices do not impede one another.

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