DE102011085748A1 - Apparatus for raising, lifting, positioning and clamping of sheet material in press or sheet metal working tool, has anti-rotation plate element with elastomeric material between stop plate and retaining plate to achieve stop damping - Google Patents

Abstract

The apparatus (100) has force pressure component (110) which applies force directly or indirectly on a sheet material (M), and recess (120) in which pressure component is guided in axially movable manner. An anti-rotation plate element (140) prevents force applied by pressure component. The anti-rotation plate element has elastomeric material (143) arranged between steel stop plate (141) and retaining plate (142) such that stop damping is achieved when pressure component strikes stop plate. The anti-rotation plate element is made of polyurethane or rubber material.

Description

The invention relates to a device for lifting, lifting, positioning and / or clamping (and the like) a sheet material in a press or in a sheet metal working tool or sheet metal processing tool. The invention further relates to a tool for sheet metal processing or sheet metal processing (sheet metal working tool or sheet metal processing tool) with at least one such device.

Devices of the type in question, which, as stated, can serve very different purposes, are known from the prior art. Representative is on the patents DE 36 10 751 C2 . DE 197 20 382 C2 and DE 10 2008 004 898 A1 directed. As the indicated prior art shows, the device in question can be a combined subassembly which is installed as a whole in the press or in the tool. Likewise, the device in question may also consist of individual components which are arranged directly in the press or in the tool.

However, known from the prior art devices of the type in question are no longer suitable for high Pressenhubzahlen (from about 20 strokes per minute). Due to the high ram speeds associated with high numbers of press strokes, the force-loaded pressure pins or pressure rods (as explained in more detail below) are no longer guided and can spring freely until they abut with full force against a stop element. The loads occurring here sooner or later lead to malfunctions and failures, whereby the loads occurring progressively increase with increasing number of press strokes. In the CH 530 861 A Therefore, a hydraulic (or possibly also pneumatic) operated braking device for the pressure pin or push rods is proposed. However, such a braking device is expensive and expensive and also can not accommodate anywhere because of the required space.

It is therefore an object of the present invention to provide an alternative way of improving the existing situation.

This object is achieved by a device according to the invention with the features of claim 1. Advantageous embodiments and further developments emerge from the dependent claims and / or from the following explanations.

With a sibling claim, the solution of the problem also extends to a tool for sheet metal processing or to a sheet metal working tool comprising at least one device according to the invention. The tool is in particular a coil tool or thermoforming and / or cutting tool. Advantageous embodiments and further developments are obtained analogously to the device according to the invention and / or analogously from the following explanations.

With a further independent claim, the solution of the task further extends to a retaining, stop and / or anti-rotation element for use in a device according to the invention, which is provided in particular for retrofitting existing devices or tools or presses. Advantageous embodiments and further developments are obtained analogously to the device according to the invention and / or analogously from the following explanations.

• – ein kraftbeaufschlagtes Druckstück, das direkt oder indirekt auf das zu handhabende Blechmaterial einwirkt;
• – eine Ausnehmung oder eine Hülse, in der das Druckstück axialbeweglich geführt ist; und
• – wenigstens ein Rückhalte- und/oder Anschlagelement, das ein Herauslösen des kraftbeaufschlagten Druckstücks aus der Ausnehmung oder der Hülse verhindert, wobei vorgesehen ist, dass dieses Rückhalte- und/oder Anschlagelement eine Anschlagplatte, eine Halteplatte und ein dazwischen angeordnetes elastomeres Material aufweist, so dass beim Anschlagen des kraftbeaufschlagten Druckstücks an der Anschlagplatte eine Anschlagdämpfung erzielt wird.

The device according to the invention comprises:

• - A force-loaded pressure piece, which acts directly or indirectly on the sheet material to be handled;
• - A recess or a sleeve in which the pressure piece is guided axially movable; and
• - At least one retaining and / or stop element, which prevents a release of the force-loaded pressure piece from the recess or the sleeve, it being provided that this retaining and / or stop element has a stop plate, a holding plate and an elastomeric material arranged therebetween, so that a stop damping is achieved when striking the force-loaded pressure piece on the stop plate.

The retaining and / or stop element can also serve as an anti-rotation device for the pressure piece. In this respect, it is assumed below by a retaining, stop and / or anti-rotation element.

The sheet or sheet material may be a Blechcoilband, a sheet metal blank or a sheet metal part. The device according to the invention may be an assembly or a component which is installed as a whole in the press or in the tool. Likewise, the device according to the invention may also consist of individual components which are arranged directly in the press or in the tool.

The pressure piece is, in particular, a pressure pin or a pressure rod. Preferably, the pressure pin or the pressure rod has a round and in particular one circular cross-section on. However, the pressure pin or the pressure rod can also have a polygonal (for example, a quadrangular) cross-section. The pressure piece is preferably made of a steel material and is in particular formed in one piece. Preferably, the pressure piece or the pressure pin is formed with a projecting and in particular radially projecting shoulder, which cooperates with the at least one retaining, stop and / or anti-rotation element, such that this shoulder to the retaining, stop and / or anti-rotation element abuts.

The retaining, stop and / or anti-rotation element has a stop plate or a stop piece on which or on which the pressure piece or the shoulder of the pressure piece can strike, as previously explained. Further, the retaining, stop and / or anti-rotation element on a holding plate or a holding piece, which serves the attachment of the retaining, stop and / or anti-rotation element on the press or on the tool. In this respect, this holding plate can also be referred to as a mounting plate or attachment piece. The stop plate and the holding plate are spaced apart by an elastic material, such that the stop plate is supported on the holding plate via the elastic material. The retaining, stop and / or anti-rotation element thus has a sandwich structure or a sandwich structure, which is formed by the two plates and the elastomeric material located therebetween. As a result, a stop damping is achieved when the pressure member abuts the retaining, stop and / or anti-rotation element and thereby prevented in its further axial movement and / or in a rotational movement (in particular about the longitudinal axis). The stop damping also protects the screw connection with which the retaining, stop and / or anti-rotation element is typically fastened.

Due to the damped stop, the device according to the invention is also suitable for high numbers of press strokes (from about 20 strokes per minute and especially from about 25 strokes per minute and sometimes even up to 40 strokes per minute and more). Furthermore, the device according to the invention is simple in construction and can be produced inexpensively or at least cost-neutral (in relation to the previously known devices). In addition, the device according to the invention has a space-saving or at least space-neutral (in relation to the previously known devices) structure and can therefore be easily arranged anywhere.

With the separately claimed retaining, stop and / or anti-rotation also existing devices can be retrofitted cost and almost no effort.

It is preferably provided that the elastomeric material located on the retaining, stop and / or anti-rotation element between the stop plate and the retaining plate is a PUR material (polyurethane material) or a rubber material (synthetic rubber or natural rubber or rubber). The elastic material can also be a material mix of several materials with different properties. Furthermore, the elastic material may be formed with reinforcements, for example with fiber and / or textile reinforcements.

Further, it is preferably provided that the retaining, stop and / or anti-rotation element is integrally formed, for which purpose the elastomeric material is bonded to the stop plate and / or with the holding plate. Alternatively, it is provided that the elastomeric material is vulcanized together with the stop plate and / or with the holding plate, whereby a particularly robust connection is made.

The pressure piece or the pressure pin can be formed from a steel material. Furthermore, it is preferably provided that the stop plate and / or the retaining plate of the retaining, stop and / or anti-rotation element are formed from a steel material. It is particularly preferred that at least the stop plate is formed of a hardened steel material. When striking the pressure piece or the pressure bolt on the retaining, stop and / or anti-rotation thus comes to a steel-to-steel contact, wherein the impact energy occurring are cushioned by the elastic material.

The retaining plate of the retention, stop and / or anti-rotation element may have one and preferably two holes for attachment of the retaining, stop and / or anti-rotation element. The bore (s) may also extend through the elastomeric material and through the stopper plate (through-holes). It should be noted that the known from the prior art retaining, stop and / or anti-rotation elements typically have only one hole for mounting. By providing two holes, however, the occurring loads can be advantageously distributed to two screw or the like.

The device according to the invention may comprise at least one gas pressure spring which permanently engages the pressure piece with a pressure force applied. Instead of a gas spring can also be provided at least one coil spring, plate spring or the like. The respective spring is tensioned by the working stroke of the press and can then relax by itself again, whereby a lifting force, a Aushebekraft, a positioning force and / or a clamping force (and the like) is then generated.

The invention will be explained in more detail below with reference to an embodiment with reference to the figures in a non-limiting manner.

1 shows a device according to the invention in a schematic sectional view.

2 shows that to the device of 1 belonging retaining, stop and / or anti-rotation element in an enlarged plan view.

3 shows the retaining, stop and / or anti-rotation element of 2 in a side view.

1 shows a total with 100 designated device according to the invention. The device 100 is an example in the lower tool 200 a forming tool or the like arranged and serves in the example shown, the lifting or lifting a sheet material M.

The device 100 includes a bolt-like pressure piece or a pressure pin 110 , The pressure pin 110 acts with a first axial end (upper axial end) directly on the sheet material M. At the opposite axial end (lower axial end) is the pressure pin 110 with a molded plate or stop plate 111 formed in a cylindrical recess 120 in the lower tool 200 is guided axially movable. Regarding the pressure bolt 110 can the plate 111 be formed symmetrically or asymmetrically. The axis of movement of the pressure bolt 110 as well as the pressure pin 110 belonging plate 111 is denoted by L. Instead of the recess 120 can also be provided a sleeve or the like.

With 130 one is also in the recess 120 arranged gas spring referred, the piston 131 permanently on the plate 111 of the pressure bolt 110 acts and pushes it upwards or in the direction of the sheet material M. During the working stroke of the press the gas spring becomes 130 by the incoming pressure pin 110 strained and can then automatically relax again, thereby over the pressure pin 110 a lifting force or Aushebekraft is exerted on the sheet material M. Alternatively, it is conceivable that the gas spring 130 not directly, but indirectly (eg via a deflection mechanism) with the pressure pin 110 interacts.

To prevent the pressure pin 110 from the recess 120 fall out or through the gas spring 130 is pushed out is at the top of the recess 120 a retaining, stop and / or anti-rotation element 140 arranged, to which the plate 111 or abuts the annular surface shoulder formed on this plate, whereby the pressure pin 110 is prevented from moving on and held in this way. The element 140 serves as a kind of stop and failsafe for the movable pressure pin 110 , Furthermore, the element 140 but also as anti-rotation device for the pressure pin 110 serve.

The retaining, stop and / or anti-rotation element 140 sits in an appropriately prepared recess in the lower tool 200 and is by means of two screws on this lower tool 200 attached (see 3 ), wherein instead of screws, other suitable fastening means may be provided. The retaining, stop and / or anti-rotation element 140 has a stop plate or impact plate 141 , a holding plate 142 and an elastomeric material disposed therebetween 143 on, so that when striking or striking by the gas spring 130 kraftbeaufschlagten pressure bolt 110 or the plate 111 on the stop plate 141 an effective stop damping is achieved. In the embodiment shown is a single retaining, stop and / or anti-rotation element 140 for the one pressure pin 140 intended. Alternatively, however, two (or more) of such retention, stop and / or anti-rotation elements 140 be provided.

2 shows the retaining, stop and / or anti-rotation element 140 in a top view. Very well to recognize here are the two holes 145 that serve the attachment. The attachment can be done, for example, by means of cap screws and washers (see 3 ), whereby the retaining, stop and / or anti-rotation element 140 very easy to assemble and disassemble. The attachment can also be done with other suitable fasteners. The in the 2 shown rectangular shape is merely exemplary.

3 shows the retaining, stop and / or anti-rotation element 140 in a side view. In this illustration, the sandwich construction from the stop plate is very good 141 , the retaining plate 142 and the elastomeric and dimensionally stable material therebetween 143 to recognize. The retaining, stop and / or anti-rotation element 140 is formed in one piece, including the elastomeric intermediate layer 143 both with the stop plate 141 as well as with the retaining plate 142 glued or vulcanised. Preferably, the stop plate 141 and the holding plate 142 made of a steel material. The elastomeric material may be a PUR material or a rubber material.

Furthermore, in 3 very good to realize that the block-like shaped elastomeric material 143 not over the outline of the stop plate 141 and / or the holding plate 142 protrudes, whereby the risk of damage during transport and / or during assembly or disassembly is reduced and whereby a rubbing of the elastic material 143 at the lower tool 200 is prevented. For similar reasons, the through holes are also 145 in the area of the elastic material 143 with a larger diameter than in the stop plate 141 and the retaining plate 142 educated.

In the embodiment shown, the stop plate 141 and the holding plate 142 formed in about the same thickness or the same strength. The stop plate 141 and the holding plate 142 However, they can be designed differently thick. Preferably, the stop plate 141 thinner than the retaining plate 142 educated.

With 150 and 151 are an exemplary illustrated fastening screw and a washer for fixing the retaining, stop and / or anti-rotation element 140 at the lower tool 200 designated. The shaft of the fixing screw 150 can through one in the hole 145 arranged sleeve to be passed, whereby the elastic material 143 is protected.

Such a sleeve can also compress the elastic material 143 when tightening the screw 150 prevent or at least limit, with the sleeve acts as a kind of spacer sleeve. Furthermore, by such a sleeve both an orientation of the holding plate 142 relative to the lower tool 200 as well as an orientation of the stop plate 141 relative to the retaining plate 142 be brought about. The sleeve can be fixed in the corresponding hole 145 be attached, which can be done, for example, by gluing or by vulcanization. Ie. the retaining, stop and / or anti-rotation element 140 can be provided in one piece with one or more sleeves in the mounting holes 145 are arranged. Alternatively or in addition to such sleeves, if appropriate, also dowel screws can be used, in which case at least the through hole through the retaining plate 142 can be designed as a pilot hole.

It is also conceivable that instead of the illustrated cylinder head bolt 150 a countersunk screw is used. In 3 is the right hole 145 ' in the holding plate 142 designed as a counterbore. By using at least one countersunk screw, an alignment of the holding plate 142 relative to the lower tool 200 be brought about. Further, the head of such a countersunk screw may optionally be completely housed in the corresponding counterbore, so that it does not protrude from the top (flat top), which is advantageous in many applications.

LIST OF REFERENCE NUMBERS

100

contraption

110

Pressure piece, pressure pin

111

Plate

120

recess

130

Gas spring

131

piston

140

Retaining, stop and / or anti-rotation element

141

stop plate

142

Retaining plate

143

elastomeric material, intermediate layer

145

mounting hole

150

screw

151

washer

200

Tool (lower tool)

L

motion axis

M

sheet material

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 3610751 C2 [0002]
• DE 19720382 C2 [0002]
• DE 102008004898 A1 [0002]
• CH 530861 A [0003]

Claims (10)

Contraption ( 100 ) for lifting, lifting, positioning and / or clamping sheet material (M) in a press or a sheet metal working tool, comprising: - a force-loaded pressure piece ( 110 ) acting directly or indirectly on the sheet material (M); - a recess ( 120 ) or a sleeve in which the pressure piece ( 110 ) is guided axially movable; and - at least one retention, stop and / or anti-rotation element ( 140 ), which is a release of the force-loaded pressure piece ( 110 ) from the recess ( 120 ) or the sleeve, characterized in that the retaining, stop and / or anti-rotation element ( 140 ) a stop plate ( 141 ), a retaining plate ( 142 ) and an elastomeric material ( 143 ), so that when striking the force-loaded pressure piece ( 110 ) on the stop plate ( 141 ) a stop damping is achieved. Contraption ( 100 ) according to claim 1, characterized in that the elastomeric material ( 143 ) is a PUR material or a rubber material. Contraption ( 100 ) according to claim 1 or 2, characterized in that the elastomeric material ( 143 ) with the stop plate ( 141 ) and / or the retaining plate ( 142 ) is glued. Contraption ( 100 ) according to claim 1 or 2, characterized in that the elastomeric material ( 143 ) together with the stop plate ( 141 ) and / or the retaining plate ( 142 ) is vulcanized. Contraption ( 100 ) according to one of the preceding claims, characterized in that the stop plate ( 141 ) and / or the retaining plate ( 142 ) is formed of a steel material is / are. Contraption ( 100 ) according to one of the preceding claims, characterized in that at least the stop plate ( 141 ) is formed of a hardened steel material. Contraption ( 100 ) according to one of the preceding claims, characterized in that the retaining plate ( 142 ) two holes ( 145 ) for attachment of the retaining, stop and / or anti-rotation element ( 140 ) having. Contraption ( 100 ) according to any one of the preceding claims, characterized in that it further comprises at least one gas spring ( 130 ), which the pressure piece ( 110 ) permanently loaded with a compressive force. Sheet metal working tool, in particular a coil, forming and / or cutting tool, comprising at least one device ( 100 ) according to any one of the preceding claims. Retaining, stop and / or anti-rotation element ( 140 ), with a stop plate ( 141 ), a holding plate ( 142 ) and an elastomeric material ( 143 ), for use in a device ( 100 ) and / or in a tool according to any one of the preceding claims.

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