EP3213834A1 - Blank cutting device for cutting out a blank elements from a metal strip - Google Patents

Abstract

The invention relates to a blank cutting device (100) for cutting out a piece of board which is delimited by a circumferential contour, comprising a metal strip comprising: a first rotatable drum (101) having a first drum shell surface (107), wherein on the first drum shell surface (107) a first cutting edge arrangement (105) is arranged in the circumferential direction of the first rotatable drum (101), wherein a contour of the first cutting edge arrangement (105) unrolled in the circumferential direction of the first rotatable drum (101) corresponds at least in sections to the peripheral contour of the sinker piece; a second rotatable drum (103) having a second drum shell surface (111), wherein a second cutting edge arrangement (109) is arranged on the second drum shell surface (111) in the circumferential direction of the second rotatable drum (103); wherein the first rotatable drum (101) and the second rotatable drum (103) are opposed to each other and rotatable in opposite directions, the metal band being guidable between the first rotatable drum (101) and the second rotatable drum (103), and wherein the first cutting edge assembly (105) and the second cutting edge assembly (109) are adapted to cut the board piece from the metal strip.

Description

The present invention relates to the production of circuit boards from a metal strip for motor vehicle structural components.

For the production of motor vehicle structural components, such as A-pillars, B-pillars, roof frames, cross members, door impact beams and the like, a circuit board is usually punched out of a metal band by means of a punch press and then formed by means of a forming tool to form a motor vehicle structural component. However, punch presses are expensive and require a relatively large amount of space. In addition, the process frequency is reduced due to the necessary strokes of the punch press. The typical throughput rates for blanking are significantly less than 50 m of metal strip per minute.

It is therefore the object of the present invention to provide a concept for the production of boards from a metal strip, with the higher number of boards per unit time can be achieved.

This object is solved by the features of the independent claims. Advantageous developments are the subject of the dependent claims, the description and the accompanying figures.

The present invention is based on the finding that the above object can be achieved by cutting out boards from a metal strip. For this purpose, two cylindrical drums arranged parallel to one another are used, whose drum shell surfaces are each provided with cutting arrangements which, for example, form cutting tools. In an opposite rotation of the drums, the cutting arrangements dive into the guided between the drums metal strip, whereby a board cut out of the metal strip, that is isolated.

In this case, the process frequency is decisively limited by a rotational frequency of the drums and not, as in the case of stamping presses, by a stroke frequency, so that higher board quantities per unit time can be achieved.

The boards are also continuously cut out of the metal strip. The occurring cutting forces are absorbed by the drums and by the drum holding the frame, so that the geometric dimensions of the overall structure are reduced, resulting in a compact design.

The cutting arrangements can also be realized as interchangeable tools, which leads to a further reduction of tooling costs. This modularity can also be made with the same drums by exchanging cutting arrangements differently contoured boards. In addition, it is possible to cut several boards in a single revolution of the drums from the metal strip by a plurality of cutting arrangements are arranged side by side in the transverse direction of the metal strip.

According to a first aspect, the invention relates to a blanking device for cutting out a piece of board which is delimited by a circumferential contour of a metal strip comprising a first rotatable drum having a first drum shell surface, wherein on the first drum shell surface in the circumferential direction of the first rotatable drum, a first cutting edge arrangement a contour of the first cutting edge arrangement which is unrolled in the circumferential direction of the first rotatable drum corresponds at least in sections to the peripheral contour of the blank piece, a second rotatable drum having a second drum shell surface, a second cutting edge arrangement being arranged on the second drum shell surface in the circumferential direction of the second rotatable drum wherein the first rotatable drum and the second rotatable drum are arranged opposite each other and are rotatable in opposite directions, wherein the metal strip z between the first rotatable drum and the second rotatable drum is feasible and wherein the first cutting edge arrangement and the second cutting edge arrangement are formed to cut out the piece of board from the metal strip, in particular completely cut out.

The first cutting edge arrangement and the second cutting edge arrangement can be realized, for example, by cutting tools releasably detachable on the drum shell surfaces and indirectly or directly attachable.

The rotatable drums, for example, spaced apart by a distance of at least 0.7 mm, the distance between the two drums can be variably adjustable, for example, depending on a thickness of a metal strip guided therebetween. For this purpose, the board cutting device may comprise a frame in which the rotatable drums are suspended and each other, for example in height, are displaceable.

The board cutting apparatus may further include a drive motor for driving the two rotatable drums. The rotatable drums are preferably synchronously driven in the opposite direction of rotation, which can be realized for example by means of a transmission. However, according to one embodiment, two separate drive motors may be employed to drive the rotatable drums in opposite directions of rotation.

By cutting out the piece of board from the metal strip due to the rotation of the rotatable drums, a uniform distribution of forces acting on the metal strip can be realized, which can lead to a reduction of the deformation of the separated boards. In addition, no reversing movements, such as occur in up and down movements of a punch press, necessary, resulting in a reduction of tooling and manufacturing costs.

According to one embodiment, a contour of the second cutting edge arrangement which is unrolled in the circumferential direction of the second rotatable drum corresponds at least in sections to the peripheral contour of the blank and / or a contour of the second cutting edge arrangement unrolled in the circumferential direction of the second rotatable drum is at least partially offset from the unrolled contour of the first cutting edge arrangement, in particular a cutting gap width, offset.

The second cutting edge arrangement may be offset with respect to the first cutting edge arrangement as a whole. However, the second cutting edge arrangement may be, for example be arranged within the contour of the first cutting edge arrangement. In both cases, a scissors-like cutting out of the piece of board is possible.

The offset between the cutting edge arrangements or between their cutting edges may correspond, for example, to a cutting gap width. If the cutting edge arrangements are realized, for example, by cutting edges, then the offset can correspond to at least one width of a cutting edge. Thus, a scissor-like meshing of the cutting edge arrangements or their cutting edges is made possible. The cutting edges are preferably contoured in the circumferential direction of the rotatable drums in response to the contour of the piece of board.

In one embodiment, the first cutting edge assembly and the second cutting edge assembly are shaped to scissorily engage with opposite rotation of the first rotatable drum and the second rotatable drum to completely cut out the piece of blank from the metal band.

For this purpose, the cutting edge arrangements can form a total closed contour, which allows a separation of the piece of board. However, the contours of the cutting edge assemblies may each be pieced together.

In one embodiment, the first cutting edge assembly and the second cutting edge assembly are shaped to singulate the board piece. For example, the cutting edge assemblies may have cutting edges that are continuous, i. are continuous. As a result, the cutting edge arrangements can have piece-wise isolated cutting edges, which engage in pairs in such a way that the piece of board can be singulated.

In one embodiment, the first cutting edge assembly and the second cutting edge assembly are arranged to cut out the at least one board piece in a single revolution of the first rotatable drum and the second rotatable drum.

Thereby, it is advantageously achieved that each piece of circuit board is separated due to the rotation of the rotatable drums after at most one revolution, i. completely cut out.

According to one embodiment, the first cutting edge arrangement has a circumferential cutting edge whose contour in the circumferential direction of the first rotatable drum corresponds to the peripheral contour of the sinker piece, and / or the second cutting edge arrangement has a circumferential cutting edge whose contour in the circumferential direction of the second rotatable drum of the peripheral contour of the board piece corresponds. This ensures that the end faces of the cut-out board pieces can also be contoured.

According to one embodiment, the first cutting edge arrangement has a circumferential cutting edge whose contour in the circumferential direction of the first rotatable drum corresponds to the peripheral contour of the sinker piece, and / or the second cutting edge arrangement has a circumferential cutting edge whose contour in the circumferential direction of the second rotatable drum of the peripheral contour of the board piece corresponds. The cutting edges form, for example, cutting tools, by means of which the board pieces are cut out. The cutting edges can be offset from each other to scissor-like interlock.

The circumferential contours of the cutting edge arrangements or of the cutting edges can correspond not only geometrically but also in terms of size to the contour of the piece of board. However, according to one embodiment, the circumferential contours may be scaled in size so that, for example, the first cutting edge arrangement has a greater extent than the second cutting edge arrangement, whereby scissor-like cutting out of the board piece with the resulting circumferential contour can be realized.

According to one embodiment, the first cutting edge arrangement is curved along the first drum shell surface, and the second cutting edge arrangement is formed curved along the second drum shell surface. The curvatures of the cutting edge arrangements correspond to the curvatures of the drum shell surfaces.

It is thereby achieved that the cutting edge arrangements run in circumferential directions of the drums along the drum shell surfaces.

According to one embodiment, the first cutting edge arrangement has a plurality of cutting edges, which are detachably, in particular non-positively and / or positively, connected to the first drum shell surface, and the second cutting edge arrangement has a plurality of cutting edges which are detachable, in particular non-positive, with the second drum shell surface and / or form-fitting, are connected.

The first cutting edge arrangement and the second cutting edge arrangement may, for example, be connected directly to the drum shell surfaces. For this purpose, the cutting edge arrangements can have attachment regions by means of which the cutting edge arrangements can be fastened to the drum shell surfaces. For this purpose, the drum shell surfaces may have recesses which are provided with threads in order to screw the cutting edge arrangements with the drum shell surfaces, for example. However, the cutting edge arrangements can also be connected by means of a tongue and groove connection with the respective drum shell surface. A combination of these joining methods is possible.

According to one embodiment, the cutting edge arrays can be made in several parts, and for example consist of two, three or four parts or segments, which are arranged in the circumferential direction of the respective drums.

According to one embodiment, the first cutting edge arrangement has one or more dish-shaped carriers, the cutting edges of the first cutting edge arrangement being arranged on outer sides of the dish-shaped carriers, the inner sides of the dish-shaped carriers being detachably, in particular non-positively and / or positively connected to the first drum jacket surface. and / or the second cutting edge arrangement has one or more cup-shaped carriers, wherein the cutting edges of the second cutting edge arrangement are arranged on outer sides of cup-shaped carriers, wherein the inner sides of the cup-shaped carrier with the second drum shell surface releasably, in particular non-positively and / or positively connected. The cup-shaped carrier serve as a base for Holder of the cutting edge arrangements or their cutting edges and may be partially shell-shaped connected to the drum shell surfaces and cover them at least partially. For this purpose, the cup-shaped carrier may have recesses which allow a frictional connection of the cup-shaped carrier with the drum shell surfaces.

According to one embodiment, the shell-shaped supports each have a curvature which corresponds to the curvature of the respective drum shell surface in the circumferential direction of the respective rotatable drum. As a result, the shell-shaped carrier can rest on the drum shell surfaces.

According to one embodiment, the cup-shaped carriers or the cutting edges of the cutting edge arrangements are positionable by means of dowel pins on the respective drum shell surface. By the dowel pins alignment or positioning of the cutting edges or the cutting edge arrangements and / or their cutting edges can be realized in a particularly advantageous manner.

According to one embodiment, the cutting edges of the first cutting edge arrangement are arranged opposite and / or on both sides of the first drum shell surface and the cutting edges of the second cutting edge arrangement are arranged opposite each other on both sides of the second drum shell surface. In this way, exactly one piece of blank is cut out across the drum width.

According to one embodiment, a distance of the cutting edges arranged on both sides of the first drum lateral surface varies in the circumferential direction of the first rotatable drum and / or a distance of the cutting edges arranged on both sides of the second drum lateral surface varies in the circumferential direction of the second rotatable drum. By varying the distances different geometric shapes of the board pieces can be realized.

According to one embodiment, a plurality of first cutting edge arrangements is arranged side by side on the first drum shell surface in the circumferential direction of the first rotatable drum and is on the second Drum lateral surface in the circumferential direction of the second rotatable drum a plurality of second cutting edge assemblies arranged side by side to cut a plurality of board pieces side by side from the metal strip in a single revolution of the rotatable drums. By juxtaposed cutting edge arrangements a plurality of, for example, two, three or four board pieces, which are arranged side by side in the transverse direction of the metal strip, can be cut out in one revolution of the drums. As a result, the process efficiency can be further increased and the width of the metal strip can be optimally utilized.

If the contours of the first cutting edge arrangements and of the second cutting edge arrangements are the same, then board pieces of the same outer contour can be cut out. According to one embodiment, however, the contours of the juxtaposed cutting edge arrangements may differ, so that during a rotation of the drums, board pieces of different contour can be cut out of the metal strip. Nesting of the blank pieces to be cut around the drum shell surface is also possible if the cutting edge arrangements and / or cutting knives are offset and / or twisted relative to one another or overlapping one another so that the material utilization of the metal band or the cutting surface of the drums can be optimally utilized.

According to one embodiment, elongate and outwardly facing cutting blades are arranged on the drum shell surface of the first rotatable drum and / or on the drum shell surface of the second rotatable drum at an angle to the circumferential direction in order to shred metal scrap scrap extending laterally of the respective cut piece of blank. In this way, in a process step, the remaining after the cutting of the board pieces metal strip parts can be replaced.

According to one embodiment, a length of the cutting blades is less than half the width of the rotatable drum. But it is also possible that a cutting blade extends over more than half the width of the rotatable drum.

According to one embodiment, the first cutting edge arrangement is a negative of the second cutting edge arrangement.

According to a second aspect, the invention relates to a method for producing a piece of board which is delimited by a circumferential contour of a metal strip, with insertion of the metal strip between a first rotatable drum and a second rotatable drum, wherein the first rotatable drum has a first drum shell surface , wherein on the first drum shell surface in the circumferential direction of the first rotatable drum, a first cutting edge arrangement is arranged, wherein a rolled in the circumferential direction of the first rotatable drum contour of the first cutting edge assembly at least partially corresponds to the peripheral contour of the sinker piece, and wherein the second rotatable drum has a second drum shell surface wherein a second cutting edge arrangement is arranged on the second drum shell surface in the circumferential direction of the second rotatable drum, wherein the first rotatable drum and the second rotatable drum each other g and driving the first rotatable drum and the second rotatable drum in opposite directions to cut out the board piece from the metal strip by means of the first cutting edge arrangement and the second cutting edge arrangement.

The method can be realized, for example, by means of the board cutting device according to the first aspect.

According to one embodiment, the metal strip has a thickness of at least 0.7 mm or the first rotatable drum and the second rotatable drum are spaced apart by at least 0.7 mm. For example, the rotatable drums are spaced apart such that a distance between the cutting edge arrays is at least 0.7 mm.

According to one embodiment, a throughput rate of more than 50 meters of metal strip per piece of board, preferably more than 75 m / min and in particular more than 100 m / min is achieved. This high throughput rate is possible because the board pieces are not punched out, but are cut out of the metal strip by rotatable cutting edge arrangements.

As material of the cutting edge arrangement or cutting blade, a high-alloyed 1.2378 CrNi steel can be selected.

Fig. 1A und 1B

Platinenausschneidevorrichtung gemäß einer Ausführungsform;

Fig. 2

Platinenausschneidevorrichtung gemäß einer Ausführungsform;

Fig. 3

Platinenausschneidevorrichtung gemäß einer Ausführungsform;

Fig. 4A und 4B

Platinenausschneidevorrichtung gemäß einer Ausführungsform;

Fig. 5

Platinenausschneidevorrichtung gemäß einer Ausführungsform;

Fig. 6

Platinenausschneidevorrichtung gemäß einer Ausführungsform;;

Fig. 7

Platinenausschneidevorrichtung gemäß einer Ausführungsform;

Fig. 8

Platinenausschneidevorrichtung gemäß einer Ausführungsform;

Fig. 9A, 9B und 9C

Konturen von Platinenstücken; und

Fig. 10

Platinenausschneidevorrichtung gemäß einer Ausführungsform.

Further embodiments of the present invention will be explained in more detail with reference to the attached figures. Show it:

Fig. 1A and 1B

A board cutting device according to an embodiment;

Fig. 2

A board cutting device according to an embodiment;

Fig. 3

A board cutting device according to an embodiment;

FIGS. 4A and 4B

A board cutting device according to an embodiment;

Fig. 5

A board cutting device according to an embodiment;

Fig. 6

A board cutting apparatus according to an embodiment;

Fig. 7

A board cutting device according to an embodiment;

Fig. 8

A board cutting device according to an embodiment;

Figs. 9A, 9B and 9C

Contours of board pieces; and

Fig. 10

Board cutting device according to one embodiment.

In Fig. 1A and 1B 12 are schematic views of a board cutting apparatus 100 according to one embodiment. The board cutting apparatus 100 includes a first rotatable drum 101 and a second rotatable drum 103 spaced from the first rotatable drum 101. Between the first rotatable drum 101 and the second rotatable drum 103, an in Fig. 1A not shown metal strip are performed, from which pieces of board completely be cut out. For this purpose, the first rotatable drum 101 comprises a first cutting edge arrangement 105 which, for example, has cutting edges 105-1 and 105-2 arranged opposite one another. The cutting edges 105-1 and 105-2 have a rolled-out in the circumferential direction contour which at least partially a contour of a in the Fig. 1A and 1B not shown piece of board corresponds.

The first cutting edge assembly 105 is disposed on a drum shell surface 107 of the first rotatable drum.

The second rotatable drum 103 correspondingly includes a second cutting edge assembly 109 having opposed cutting edges 109-1 and 109-2. The cutting edges 109-1 and 109-2 are offset, for example, overall to the right with respect to the cutting edges 105-1 and 105-2, whereby a scissor-like engagement of the cutting edge arrangements 105, 109 is possible. Here, for example, in the circumferential direction of the drums 101, 103, a piece of board can be cut out.

The cutting edges 105-1 and 105-2 and 109-1 and 109-2 have in the circumferential direction, for example, a variable height, as for example in the Fig. 1A is shown, which allows immersion of the cutting edges 105-1 and 105-2 and 109-1 and 109-2 in the metal strip.

As it is in Fig. 1A is shown, the cutting edge assemblies 105 and 109 can be arranged directly on the drum shell surfaces 107, 111 segmented. For this purpose, several segments of the cutting edge arrangements 105 and 109 can be arranged in the circumferential direction of the respective rotatable drum 101, 103, for example two segments 113-1, 113-2, which are assigned to the first rotatable drum 101, and 115-1, 115-2, which are associated with the second rotatable drum 103.

To cut out the piece of board, the rotatable drums 101, 103 are driven in opposite directions 121, 123 about their longitudinal axes 117 and 119. The direction of rotation 121 of the first rotatable drum 101 may, for example, run clockwise, while the direction of rotation 123 of the second rotatable Drum 103 runs counterclockwise. The directions of rotation 121, 123 can also be reversed.

In Fig. 2 an alternative arrangement of the cutting edges 105-1, 105-2 and 109-1, 109-2 is shown schematically. As it is in Fig. 2 is shown, the cutting edges 109-1, 109-2 closer, so that the first cutting assembly 105 has a greater extent than the second cutting assembly 101. Thus, the first cutting edge assembly 105 has a contour that is located outside the contour of the second cutting edge assembly 109. Thus, the cutting edges 105-1, 105-2 form outer cutting edges, and the cutting edges 109-1 and 109-2 form inner cutting edges which respectively interengage in a scissor-like manner. In this way, a plurality of cutting edge arrangements 105, 109 can be arranged in the circumferential direction of the respective drum 101, 103, whereby a plurality of sinker pieces can be cut out of the metal strip during one revolution of the drums 105, 107.

Fig. 3 shows an embodiment of the blanking device 100, wherein the cutting arrangements are each made of four segments 301-1 to 301-4 and 303-1 to 303-4.

In the FIGS. 4A and 4B For example, the attachment of the first cutting edge assembly 105 is shown on the first drum shell surface 107 for the exemplary case in which the first cutting edge assembly 105 is made of four segments 301-1 to 301-4. The cutting edges of the cutting edge assembly 105 are in the in Fig. 4A illustrated embodiment directly connected to the drum shell surface 107. For this purpose, in the segments 301-1 to 301-4 pairs of first recesses 601 are formed for receiving threaded bolts. For this purpose, the first rotatable drum 101 comprises corresponding threaded receivers 603, which enable the segments 301-1 to 301-4 to be screwed together.

For positioning the segments 301-1 to 301-4 on the drum shell surface 107 positioning recesses 605 are formed in the segments 301-1 to 301-4, in which dowel pins 607 are used. In the first rotatable drum 101 corresponding receptacles 609 are formed for this purpose. This is an exact positioning of the Segments 301-1 to 301-4 guaranteed. In Fig. 4B the enlarged portion 600 is shown.

For example, the segments 301-1 to 301-4 may realize cutting edges of the first cutting edge assembly 105.

According to one embodiment, in the in FIGS. 4A and 4B illustrated manner, all cutting edges or all Schneidkantenanordnungen the first rotatable drum 101 and the second rotatable drum 103 are attached.

According to one embodiment, in an analogous manner in the FIGS. 4A and 4B not shown carrier with the rotatable drums 101, 103 are attached, which carry the cutting edge assemblies.

Fig. 5 shows an embodiment of the Blankausschneidevorrichtung, wherein on the drum shell surface 107 of the first rotatable drum 101 inclined cutting blades 701 are arranged to cut off leftover metal scrap and to reduce or reduce.

The drum shell surface 111 of the second rotatable drum 103 is provided in a corresponding manner with slanted knives 703.

That way, as it can in Fig. 6 is shown, the remaining metal scrap 801 a scrap conveying path 803 are supplied, while a piece of board 805, which is cut out of the metal strip 807, is transported away via a sinker conveyor line 809.

In the Figs. 7A and 7B For example, views of the board cutting apparatus 100 according to one embodiment are shown.

The first rotatable drum 101 and the second rotatable drum 103 are arranged, for example, by means of shafts 901, 903 in a frame 905. The frame 905 has side drum columns 907 for receiving the shafts 901 and 903. Thus, the cutting forces can be efficiently absorbed by the frame 905. over Shock-absorbing damping elements on the bearing of the respective drum 101, 103 or the attachment of carriers or the cutting edge assemblies 105, 107, both the noise and the load on the frame 905 can be reduced.

Fig. 8 shows a cut surface 1001 between the first cutting edge assembly 105 and the second cutting edge assembly 109. The engagement length, due to the exemplary curvature, is 32.5 mm for a material thickness of exemplarily 2 mm of a metal strip 1003 from which a blank is cut out.

The engagement length 1001 of the cutting edge arrays 105, 107 or their cutting edges can be increased or decreased independently of the selected radius of the rotatable drums 101, 103. This can be realized, for example, by an adaptation of bending radii of the cutting edge arrangements 105, 107. However, the engagement length 1001 of the cutting edge assemblies 105, 107 or their cutting edges may be increased or decreased depending on the selected radius of the rotatable drums 101, 103.

For example, the diameters of the rotatable drums 101, 103 can be made in 5 cm jumps, so that, for example, with a diameter of 800 mm, a tool length of 2500 mm is achieved. With a diameter of 1200 mm, however, a tool length of 3800 mm can be achieved.

The circumference of the rotatable drums 101, 103 can be adjusted according to an embodiment by means of tool attachments.

In the Figs. 9A, 9B and 9C exemplary contours of board pieces 1101, 1103 and 1105 are shown.

The board piece 1101 has in the middle, for example, a recess 1102, which can also be cut out by means of the cutting edge arrangements 105 and 109. The outer contour 1104 of the board piece 1101 is reached at the latest one revolution of the rotatable drums 101, 103, wherein the cutting edge arrangements 105, 109 correspond to the engagement of the contour 105. The board piece 1101 can be used for example for producing a tunnel of a vehicle floor structure.

This in Fig. 9B shown board piece 1103 has an outer contour 1107, which allows the production of an A-pillar or a roof frame. The outer contour 1107 is circumferential and can be cut out at the latest one revolution of the rotatable drums 101, 103 from a metal strip by means of the cutting edge assemblies 105, 109, the contour of which, for example, in engagement with the contour 1107 corresponds.

The board piece 1105, which is in Fig. 9C has a circumferential contour 1008, which allows efficient production of a B-pillar. The circumferential contour 1008 is cut out of a metal strip at the latest one revolution of the first and second rotatable drums 101, 103.

As it is in Figs. 9A to 9C is shown, by means of a geometric shape of the cutting edge arrangements 105, 109 in the circumferential direction of the respective rotatable drum 101, 103 and in the transverse direction thereto arbitrary contours 101, 107, 109 are simulated by board pieces.

Fig. 10 shows the board cutting device 100 according to an embodiment in which across the width of the first rotatable drum 101, a plurality of first cutting edge arrangements 105, for example two or three, is arranged. The second rotatable drum 103 is for this purpose correspondingly provided with second cutting edge arrangements 109. In the case shown arise per revolution of the drums 101, 103, for example, four board pieces.

For example, the unrolled contours of the cutting edge assemblies 105, 109 result in engagement with the outer contour 1109 of the blank 1105 Fig. 9C , In this way, the production efficiency can be further increased.

LIST OF REFERENCE NUMBERS

100

Platinenausschneidevorrichtung

101

first rotatable drum

103

second rotatable drum

105

first cutting edge arrangement

105-1

cutting edge

105-2

cutting edge

107

first drum shell surface

109

second cutting edge arrangement

109-1

cutting edge

109-2

cutting edge

111

second drum shell surface

113-1

segment

113-2

segment

115-1

segment

115-2

segment

117

longitudinal axis

119

longitudinal axis

121

direction of rotation

123

direction of rotation

301-1 to 301-4

segments

600

section

601

first recess

603

threaded receptacle

605

admission

607

dowel

609

admission

701

cutting blade

703

knife

801

scrap metal

803

Scrap conveyor line

805

platinum piece

807

metal band

809

Platinum conveyor line

901

wave

903

wave

905

frame

907

pillar

1001

section

1003

metal band

1101

platinum piece

1102

recess

1103

platinum piece

1104

recess

1105

platinum piece

1107

outer contour

1108

outer contour

Claims (18)

A blank cutting device (100) for cutting out a piece of board that is bounded by a circumferential contour from a metal strip, comprising: a first rotatable drum (101) having a first drum shell surface (107), wherein a first cutting edge arrangement (105) is arranged on the first drum shell surface (107) in the circumferential direction of the first rotatable drum (101), wherein a circumferential direction of the first rotatable drum (107) 101) unrolled contour of the first cutting edge arrangement (105) corresponds at least in sections to the peripheral contour of the blank piece; a second rotatable drum (103) having a second drum shell surface (111), wherein a second cutting edge arrangement (109) is arranged on the second drum shell surface (111) in the circumferential direction of the second rotatable drum (103); wherein the first rotatable drum (101) and the second rotatable drum (103) are opposed to each other and rotatable in opposite directions, the metal band being guidable between the first rotatable drum (101) and the second rotatable drum (103), and wherein the first cutting edge assembly (105) and the second cutting edge assembly (109) are adapted to cut the board piece from the metal strip. A blanking apparatus (100) according to claim 1, wherein a contour of the second cutting edge arrangement (109) unrolled in the circumferential direction of the second rotatable drum (103) corresponds at least in sections to the peripheral contour of the board piece, and / or a circumferential direction of the second rotatable drum (103). unrolled contour of the second cutting edge arrangement (109) at least in sections to the unrolled contour of the first cutting edge arrangement (105), in particular by a cutting gap width, is offset. The board cutting apparatus (100) of claim 1 or 2, wherein the first cutting edge assembly (105) and the second cutting edge assembly (109) are so are shaped to scissorily engage with opposite rotation of the first rotatable drum (101) and the second rotatable drum (103) to completely cut out the piece of blank from the metal band (1003). A board cutting apparatus (100) according to any one of the preceding claims, wherein the first cutting edge assembly (105) and the second cutting edge assembly (109) are arranged to cut out at least one board piece in one revolution of the first rotatable drum (101) and the second rotatable drum (103) , A blanking apparatus (100) as claimed in any one of the preceding claims, wherein the first cutting edge assembly (105) and / or the second cutting edge assembly (109) has at least one cutting edge (105-1, 105-2; 109-1, 109-2) which is angled , in particular at an angle different from 90 degrees, is arranged to a conveying direction of the metal strip in order to separate the piece of board. A board cutting apparatus (100) according to any one of the preceding claims, wherein the first cutting edge assembly (105) has a circumferential cutting edge (105-1, 105-2) whose contour in the circumferential direction of the first rotatable drum (101) corresponds to the peripheral contour of the board piece, and or wherein the second cutting edge arrangement (109) has a circumferential cutting edge (109-1, 109-2) whose contour in the circumferential direction of the second rotatable drum (103) corresponds to the circumferential contour of the piece of board. The board cutting apparatus (100) of any one of the preceding claims, wherein the first cutting edge assembly (105) is curved along the first drum shell surface (107), and wherein the second cutting edge assembly (109) is curved along the second drum shell surface (111). Blanking device (100) according to one of the preceding claims, wherein the first cutting edge arrangement (105) has a plurality of cutting edges (105-1, 105-2), which releasably, in particular non-positively and / or positively, connected to the first drum shell surface (107) are, and where the second Cutting edge assembly (109) has a plurality of cutting edges (109-1, 109-2) which are connected to the second drum shell surface (111) releasably, in particular non-positively and / or positively connected. The blanking apparatus (100) of claim 8, wherein the first cutting edge assembly comprises one or more cup-shaped supports, wherein the cutting edges (105-1, 105-2) of the first cutting edge assembly (105) are disposed on outer sides of the cup-shaped supports, the inner sides of the cup-shaped ones Carrier with the first drum shell surface (107) releasably, in particular non-positively and / or positively, are connected, and the second cutting edge assembly (103) one or more cup-shaped carrier, wherein the cutting edges (109-1, 109-2) of the second cutting edge assembly ( 109) are arranged on outer sides of cup-shaped carriers, wherein the inner sides of the cup-shaped carrier with the second drum shell surface (111) releasably, in particular non-positively and / or positively connected. A board cutting apparatus (100) according to claim 9, wherein the cup-shaped carriers each have a curvature corresponding to the curvature of the respective drum shell surface (107; 111) in the circumferential direction of the respective rotatable drum (101, 103). Blanking device (100) according to one of the preceding claims 8 to 10, wherein the cup-shaped carrier or the cutting edges are positionable by means of dowel pins (607) on the respective drum shell surface (107, 111). A blank cutting apparatus (100) according to any one of the preceding claims 8 to 11, wherein the cutting edges (105-1, 105-2) of the first cutting edge assembly (105) are located opposite or on both sides of the first drum shell surface (107), and wherein the cutting edges (109 -1, 109-2) of the second cutting edge arrangement (109) are arranged opposite one another on both sides of the second drum shell surface (111). A blank cutting device (100) according to claim 12, wherein a distance of the cutting edges arranged on both sides of the first drum shell surface (107) The circumferential direction of the first rotatable drum (101) varies, and / or wherein a distance of the cutting edges arranged on both sides of the second drum lateral surface (111) varies in the circumferential direction of the second rotatable drum (103). A board cutting apparatus (100) according to any one of the preceding claims, wherein a plurality of first cutting edge assemblies (105) are juxtaposed on the first drum shell surface (107) in the circumferential direction of the first rotatable drum (101), and on the second drum shell surface (111) in the circumferential direction the second rotatable drum (103) has a plurality of second cutting edge arrays (109) juxtaposed to cut a plurality of board pieces side by side out of the metal strip (1003). A blanking apparatus (100) according to any one of the preceding claims, wherein on the drum shell surface (107) of the first rotatable drum assembly and / or on the drum shell surface (111) of the second rotatable drum assembly angularly disposed to the circumferential direction, elongated and outwardly facing cutting blades are arranged laterally to shred the scrap metal scrap running out of the cut piece of sinker. A method of manufacturing a board piece bounded by a circumferential contour from a metal strip, comprising: Inserting the metal strip between a first rotatable drum (101) and a second rotatable drum (103), wherein the first rotatable drum (101) has a first drum shell surface (107), wherein on the first drum shell surface (107) in the circumferential direction of the first rotatable drum (101) a first cutting edge arrangement (105) is arranged, wherein one in the circumferential direction of the first rotatable drum (101) unrolled contour of the first cutting edge assembly (105) at least partially corresponds to the circumferential contour of the board piece, and wherein the second rotatable drum (103) has a second drum shell surface (111), wherein on the second drum shell surface (111) in the circumferential direction of the second rotatable drum (103) a second cutting edge arrangement is arranged, wherein the first rotatable drum (101) and the second rotatable drum (103) are arranged opposite to each other; and Driving the first rotatable drum (101) and the second rotatable drum (103) in opposite directions to cut out the board piece from the metal tape by means of the first cutting edge assembly (105) and the second cutting edge assembly (109). The method of claim 16, wherein the metal strip has a sheet thickness of at least 0.7 mm, or wherein the first rotatable drum (101) and the second rotatable drum (103) are spaced apart by at least 0.7 mm. The method of claim 16 or 17, wherein a throughput rate of more than 50 m metal strip per piece of board, preferably more than 75 m / min and in particular more than 100 m / min is achieved.

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