KR20120070510A - Device for pre-tensioning a machine frame, machine frame, and pressing and drawing device - Google Patents

Abstract

PURPOSE: A machine frame pre-tensioning a machine, a machine frame, a pressing apparatus, and a drawing apparatus are provided to easily install a tie rod on the machine frame by cross-aligning a rod head on a vertical extension unit. CONSTITUTION: A machine frame pre-tensioning a machine(20) includes first and second rod heads(22, 23), and a tie rod(21). The first and second rod heads are arranged on a machine frame. The tie rod includes an extension unit(24) absorbing tensile stress in between the rod heads, and being extended along to the tension distance(25) of the tie rod. One of the rod heads includes a direction reversing device(26) for the extension unit.

Description

Machine frame pre-tensioning device, machine frame, and pressing device and drawing device TECHNICAL DEVICE FOR PRE-TENSIONING A MACHINE FRAME, MACHINE FRAME, AND PRESSING AND DRAWING DEVICE

The present invention relates to an apparatus for pre-tensioning a machine frame, the apparatus comprising a first and a second rod head for arranging over the machine frame and a tensioning element for absorbing tension between the rod heads. And the tensioning element extends along the tensioning distance of the tie rod.

The invention also relates to a machine frame, wherein the machine frame has a lower crosshead and an upper crosshead to absorb processing forces entering the machine frame, and has a frame element for positioning the two crossheads apart from each other. And at least one tie rod acting between the two crossheads, the tie rod having two rod heads and a tensioning element, the tie rod being mounted on the crosshead by the rod head.

The invention also relates to a pressing device or a drawing device having a machine frame and having a device for pre-tensioning the machine frame.

In machine frames of the type mentioned above, tensioning devices, in particular pressing devices or drawing devices, are well known in the art. Often, such machine frames are constructed in a column type structure. This means that the tie rods of the tensioning devices often consist of a solid steel column capable of absorbing both tensile and pressure forces. The heavy design not only makes the process of installing such a machine frame difficult, but also a disadvantage. This is especially true when steel columns of solid construction are used as tie rods. In addition, the numerical value, especially the length, of these steel columns acts as a barrier, especially because the pressing device is often a press with a height of several meters.

On the one hand, a pressing device in which tensile stress is applied to the tension rod and, on the other hand, pressure resistant spacers arranged between the upper crosshead and the lower crosshead are well known, for example JP 2001-. 058238 A.

For example, press frames or similar machine frames exposed to very large and alternating tensile stresses are described in published patent applications DE 22 39 147 A1 and utility model JP 54-150181 U. The frame tensioning elements to be applied are arranged between the crosshead and the lower crosshead and on the other hand are provided rigid and pressure resistant spacer portions. Tensile elements composed of high-strength steel wire stably absorb the largest press pressure to the desired degree despite the small cross section. To this end, in DE 22 39 147 A1, each tensioning element has a plurality of high rigid steel wires arranged essentially parallel to each other, which in each case is connected to the lower crossbar (tensioning nut) by means of a tensioning nut. crossbar) and braced on the crossbar. JP 54-150181 U describes steel wire. Thus, each high rigid steel wire reaches the lower crossbar once from the crosshead. Individual high rigid steel wires of tensioning elements can be handled more easily than tie rods with solid steel columns. In this respect, the disadvantages of the press frame with the column type design can be avoided.

In the case of another press with a press frame in a pre-tensioning structure described in published patent application DE 23 31 318 A1, the tensile elements consist of a sheet-metal lamellae package, wherein The sheet-metal thin film layer is run once from the cylinder crossbar to the counter-crossbar of the press frame. The individual sheet-metal thin films are clamped together at the ends by pressure support, like a sheet-metal package, thereby forming one tensioning element for the press frame. Here, the individual sheet-metal thin film layers are easier to handle than tie rods with solid steel columns, especially during installation. However, when a press with a few meters height is involved, the sheet-metal thin film layer is still very high in structure.

Another published patent application DE 25 32 108 A1 describes a press frame, wherein the tie rods consist of a pre-tensioned mantle comprising individual strips or wires. The pre-tensioned curtain is arranged on the outside around the pillars of the press frame and around the yokes, with individual strips or wires fixed to the press frame in the foot region of the press frame and thus the pre-seal. The tensioned curtain can be fixed with the press frame. In this regard, each individual strip or wire is arranged once around the yoke. In this configuration, the pre-tensioned membrane absorbs the effective processing forces in the press and as a result the stresses applied to the other frame components are relieved.

In published patent application DE 15 75 278 A1, a machine frame composed of pre-stressed concrete is shown. Here, the machine frame consists of a core that stores tensile forces and a sheathing construction homogeneously connected to the core, wherein a sense of high rigid steel wire or strip is formed between the core and the sheath structure. Windings are arranged to create tension in the press body. In this regard, the windings hold together the upper and lower portions of the press body, whereby the windings are pre-tensioned. By means of the windings, tensile and bending stresses can be absorbed in the machine frame made of pre-tensile concrete. Thus, it is true that tensile and bending stresses can be absorbed as described above without using a conventional tie rod. However, mechanical frames made of pre-tensioned concrete are very heavy in construction and therefore not particularly suitable for large presses.

Another press frame is known from published patent applications DE 28 18 511 B1 and DE 30 07 975 B1, wherein the upper crossbar and the lower crossbar are arranged at a distance from each other in a stand. The press frame has a tensioning device having a plurality of individual tensioning elements mounted on or fixed on the upper crossbar and having appropriate fastening elements on the lower crossbar. At least one of the crossbars has a wrap-around support in the form of an arc for the tensioning elements. The tensioning elements can be mono-filament tensioning steel in the form of round steel or strip steel or a tensioning cable consisting thereof. These tension cables each pass from the first anchor element to the second anchor element, in which case the tension cable is deflected at one of the crossbars. The tension cable is tensioned by appropriate tensioning devices in the region of the fastening element, whereby the upper crossbar, the lower crossbar, and the stands arranged therebetween are pre-tensioned to form a press frame, the tension cable being The processing forces can be absorbed within the press frame. The tension cable can also be used and arranged without a solid steel column. However, the installation of the press frame on site is relatively complicated because the tension cable must pass through the entire press frame. In the case of large presses with correspondingly high tensile cables, the process of installing a press frame as described above is quite difficult.

It is an object of the present invention to further develop pre-tensioning devices of the type mentioned above so that these tensioning devices have a significantly simpler structure and can be installed more quickly and withstand very large stresses.

The object is realized by an apparatus for pre-tensioning a machine frame according to the invention, which device comprises first and second rod heads for engaging over the machine frame and between the rod heads. A tie rod including a tension element for absorbing tensile force, the tension element extending along a tension distance of the tie rod, and at least one rod of the two rod heads. Head Preferably both rod heads comprise a direction reversing device for said tensioning element.

Due to the directional reversal device, the rod head or tie rod as a whole has a particularly simple configuration. This means, in particular, that a single tensioning element that bends several times can be used and there is no need for a number of fastening and tensioning devices for the individual tensioning elements as required in the prior art.

A particularly highlighted advantage is that when a tie rod or pre-tensioning device is pre-tensioned, only one single tensioning element per pre-tension should be pre-tensioned, thus greatly simplifying the installation effect. This is particularly desirable for machine frames with a height value of several meters. If necessary, it should be understood that multiple tensioning elements may be provided per tie rod, thus reducing the above mentioned advantages but still present a significant advantage.

Here, the term "tie rod" refers to all devices used in the machine frame to absorb tensile stress in the machine frame. These tensile stresses are generated inside the machine frame, for example due to pressing pressure in the press. It should be understood that the tie rod may comprise a pressure bar or pressure rod or may be suitable to absorb pressure forces or other forces. However, this is not necessary because in this case these pressure devices are theoretically made available by the machine frame. In this respect, the structure of the pre-tensioning device or the tie rod of the present invention is further simplified.

In the present invention, the term "tension element" includes all devices capable of absorbing tensile forces but not absorbing pressure forces or pressure forces applied in a single magnitude. For example, the tensioning element may consist of a wire. This already means that the directional reversal device needs to bend the corresponding tensioning element so that all the correspondingly bendable devices are unstable against other forces other than pressure or tensile forces.

Preferably, the tensioning element is formed as a tension cable, in particular a steel cable. Similarly, the tensioning element can be a rod, for example a steel rod or strip, for example a narrow strip of steel, for example. However, in terms of good absorption of force, in particular for force / weight ratios, cable construction has proved particularly desirable.

The term "tension cable" should be understood to mean an elongate element that is inherently loose and not bending and is theoretically composed of joined wires that are elastic to transfer tension forces. Here, since such a tension cable is sufficiently known in the prior art, the details of possible structures of the tension cable will not be discussed.

Preferably, the tie rods may be equipped with only one single tension element. In this case, the overall device for pre-tensioning the machine frame is remarkably simple.

 It is to be understood that in one particularly preferred variant the tie rod may comprise more than one tension element.

The direction reversing device can be designed in a number of different ways. Structurally particularly simple, one or more of the rod heads, in particular both rod heads, can be embodied to have a bending area for the tensioning element, which can be configured in convex form. Preferably, the tensioning element can be bent several times particularly smoothly on the rod head, so that it can be passed several times along the tension distance of the tie rod.

Theoretically, the tensioning element is bent around a convexly curved region, which is located on the opposite side of the tension distance of the tie rod. In this way, the rod head can be particularly simply constructed and manufactured.

Furthermore, by this several bending of only one single tensile element, in particular a simple design, good pre-tensioning of the machine frame is realized. Accordingly, the maximum processing force that can be implemented, for example processing pressures on the press, can also be largely selected accordingly.

In this respect, an object of the present invention is realized by a machine frame, which has a lower crosshead and an upper crosshead to absorb processing forces entering into the machine frame, and a frame for positioning the two crossheads apart from each other. An element, having at least one tie rod acting between the two crossheads, the tie rod having a tension element acting between the two rod heads with two rod heads at the ends of the tie rod, the tie The rod is mounted on the crosshead by the rod head and the tensioning element is arranged to bend around the rod head of one or more of the rod heads.

As already described above, with respect to the tensioning device, when the tensioning element is positioned to rotate around or be arranged around one or more of the rod heads, the entire machine frame has a particularly simple structure.

In this respect, it is possible without tensioning and / or fixing devices on the rod head, thus greatly simplifying the installation and / or maintenance process for setting up the concrete pre-tension of the machine frame.

Here, for the sake of simplicity, it should be pointed out that the machine frame can be arranged in the horizontal direction so that processing forces such as, for example, pressure forces in the press can act in the horizontal direction rather than in the vertical direction.

According to one variant which should be particularly emphasized, the tensile element passes several times from the first rod head to the second rod head and / or so that the ultimate strength of the tie rod is greater than the ultimate strength of the tension element. Passed several times from the second rod head to the first rod head.

For example, if the tension element passes twice between two rod heads along the tension distance of the tie rod, the ultimate strength of the tie rod may be twice the ultimate strength of a single tension element.

If the tension element passes between the two rod heads by a corresponding number of times along the tension distance, the ultimate strength of the tie rods increases accordingly several times, where there is only one single tension element of the tie rods.

In this respect, not only the machine frame but also the pre-tensioning device or tie rod according to the invention may already be particularly compact. However, even in this case, particularly good pre-tensioning is realized, so that correspondingly good processing forces are also possible.

If the machine frame is further characterized by supports for supporting the load head, at least one of the supports includes a through-path for the tensioning element, the through-path having a base surface larger than the load head base surface. In particular, the installation of the tie rods on the machine frame can be significantly simplified because the rod head with the tensioning element can be passed through the machine frame or through the support. In this way, threading work, in particular deviations from the tension rods of the corresponding solid structure, can be quite simple.

In order to engage the tie rods to the support, it is preferred that in each case the rod heads are mounted on the support and arranged so as to intersect with respect to the longitudinal extension of the associated through-path. Therefore, the rod head should be rotated by about 90 ° about the vertical axis after passing through the through-passage of the support and arranged on the support to enable quick and easy installation on the machine frame.

It should be understood that when the corresponding support pedestal is arranged between the support and the rod head end of the rod head, the rotation of the rod head may be superfluous and the through-path may be connected by the support pedestal. This support pedestal can in particular be used as components of the tensioning device or as tensioning elements.

It should be understood that the embodiment of the rod head and support described above is advantageous regardless of other features of the present invention, wherein the machine frame embodied herein includes a lower crosshead and an upper part to absorb the processing forces entering the machine frame. Having a crosshead, having a frame element for positioning the two crossheads apart from each other, having one or more tie rods acting between the two crossheads, the tie rods having two rod heads at the ends of the tie rods; And a tensioning element acting between the two rod heads, in which case the tie rod is mounted on the crosshead by the rod head.

If the support comprises a device for tensioning a tie rod having a tensioning element, which tension element is arranged between the contacting surface of the support and the contacting surface of the rod head, the tensioning element can be pre-tensioned particularly accurately within the machine frame. have.

In this regard, the tensioning element can have a number of different designs. The tie rod can be pre-tensioned, particularly simple, easy and stable, when the tensioning element comprises a tensioning wedge.

In this regard, one preferred variant of the invention provides a tensioning device, which is either cumulatively or alternatively, a device for tensioning a tie rod, and a tensioning element in the form of a wedge, preferably Comprises a tensioning device having two wedge-shaped tensioning elements. This tensioning device is particularly preferred when a device for tensioning the tie rods is installed in the support of the machine frame.

It should be noted that the pre-tensiles can be carried out precisely and significantly simply, in particular according to the wedge-shaped tensioning elements, so that this tensioning device can further develop known pre-tensioning devices without any other features. do.

The machine frame can preferably be further developed if the machine frame has a device for pre-tensioning a machine frame having one of the features described above.

It is more preferred that at least one of the rod heads, preferably both rod heads, comprise a contact surface for the tensioning elements of the tie rods on the support. In this regard, it is desirable for the contact surface to be concave in shape so that the tensioning element can particularly stably interact with the rod head.

In a configuration, it is more preferable when one of the two load heads has a device for receiving the attachment device of the tension element, in order to be able to attach the tension element particularly simply to the rod head. In theory, two attachment devices of the tensioning element can be attached to the receiving device.

Such a fastening device can be, for example, a wedge lock, a cable eye, a forked cable sleeve, or the like at the end of the tensioning element.

In this respect, both ends of the tensioning element are attached onto only one of the two rod heads. In this way, the installation of the tie rods or the maintenance work on the tie rods can be simplified because the corresponding engagement work can be carried out on one of the two rod heads.

In this respect, according to a preferred variant, the rod head of the tie rod is configured asymmetrically.

The structure of the tie rods can alternatively be simpler if the tensioning element is configured as an endless tension cable.

In this variant, there is no need for a corresponding device for accommodating the device for attaching the tension element device on the rod head or a corresponding connection device for the tension element, which means that an endless tension cable does not require a special connection device or the like, but the rod Because it must be arranged around the head.

When the tensioning element is arranged to rotate around one or more of the rod heads, the tensioning segment of the tensioning element may preferably be tensioned along the tension distance on both sides of the rod head in order to be able to absorb the tension forces.

It is particularly preferred that the tensioning elements are arranged on both sides of at least one of the two rod heads. In this way, the forces can for example be uniformly distributed over the tensioning elements.

It is therefore desirable for the tension element to have more than one tension segment acting between the rod heads. In this way, the ultimate strength of the tie rods can be increased several times.

It is more preferred that the tensioning element has more than one tensile distance partitioning area along the tensioning distance such that the tensile forces acting on the tensioning element are distributed over a number of tensioning segments of the tensioning element along the tensioning distance.

Preferably, the tensioning element is arranged to pass and return several times from the first rod head to the second rod head so that multiple tension segments between the rod heads can affect only one single tension element. In this way, the ultimate strength of the tie rods can be increased several times, particularly simply in configuration.

In another further preferred variant, the tensioning element is arranged to be passed two or more times, preferably several times along the tension distance.

If the tensioning element has a length that is several times the tensioning distance, a single tensioning element can be easily passed through the tensioning distance several times, thereby making the tie rod structure simpler as already described above. To be able.

If the tensioning element is formed to be rolled up, the pre-tensioning device can be additionally considerably simpler, especially during the transport or installation of the tie rod or tensioning element.

It should be understood that the tie rods may include more than one single tensile element. This is practical, for example, in size and / or weight, when a single tensile element is too difficult to handle.

According to a further preferred variant, in height, the tie rods can be adjusted in a variable manner. For example, different tie rod heights may be set to one single tension element in that the tension elements are passed along the tension distance a few times as already described several times above.

In this way, tie rods of different sizes may be possible with a single standard length of tension element.

In order to make the transfer of this pre-tensioning device simpler, the tie rods have one or more additional heights, such as, for example, installation height and / or transport height. Having a height, wherein the additional height is preferred when it can be less than half or less than one third of the working height. The conveying height can then be chosen very low, for example by roll-up or hardening, which makes the advantage even more apparent, especially during and before installation.

It should be understood that the device for pre-tensioning the machine frame can only be equipped with a single tie rod. In the most practical case, the pre-tensioning device comprises at least two tie rods, preferably four tie rods, so that the processing forces and tension forces can symmetrically enter the existing machine frame and be absorbed by the machine frame.

The object of the invention is thus embodied by a pressing device or a drawing device, in particular having a machine frame and having a device for pre-tensioning the machine frame, wherein the pressing device or the drawing device is provided above. Characterized by a machine frame and / or a pre-tensioning device according to one of the described features.

Other advantages, objects, and features of the present invention will be described in detail in the following description with reference to the accompanying drawings, in which a pre-tensioning device is shown as an example, which is a mechanical frame of the pressing device. Have 4 tie rods and 1 tie rod for.
1 is a front view diagrammatically showing a press with a conventional press frame in a stand structure according to the prior art;
2 is a schematic front view of a tensioning device of a machine frame with tie rods comprising a single tensioning element;
3 is a schematic front view of a mechanical frame of a press with a tensioning device comprising four tie rods, each tie rod having a single tension element.
4 is a schematic top view of the crosshead of the machine frame from FIG. 3 with supports, each of which has a through-path for the rod head of the tie rod;

The press 1 shown in FIG. 1 has a conventional structure consisting of a press frame 2 known from the prior art, which press frame 2 has a cylinder crossbar 3 and a counter-crossbar 4 and 4. A stand mechanism 5 consisting of two independent pressure supports 6 (the number being selected by way of example only). Tensile rods 7 made of steel are arranged in each said pressure support 6. Each tension rod 7 protrudes beyond the cylinder crossbar 3 and protrudes past the counter-crossbar 4 on the outside, so that one tension nut 10 or 11 (the number is selected by way of example only) in each case. It can be screwed over the ends 8 and 9 of the tension rod 7. Although the pressure support 6 is separated from each other from the cylinder crossbar 3 and the counter-crossbar 4, the press frame 2 is pre-tensioned by the tension rod 7 as a whole. In each case the two tension nuts 10 and 11 of the tension rod 7 are tightened so that the components, the cylinder crossbar 3, the counter-crossbar 4 and the pressure support 6 are pressed against each other. And the press frame 2 is pre-tensioned at this time. The press frame 2 comprises a pressing device 12 consisting essentially of an anvil 13 and a pressing punch 14, which pressing drive 14 has a cylinder arranged on a cylinder crossbar 3. Unit 15. In contrast, the anvil 13 is provided above the counter-crossbar 4. While working with the pressing device 12, a high pressure force 16 is generated which must be absorbed by the press frame 2. For this purpose, a tension rod 7 is provided which counteracts the pressure force 16. Accordingly, the tension rod 7 is subjected to tensile stress and correspondingly a numerical value must be firmly established so that the pressure force 16 does not plastically press the press frame 2. It is obvious that the tension rod 7 must be designed very large in the case of large presses with several tons of pressing force, and therefore the construction is very heavy and correspondingly difficult to handle, especially during installation of the horizontal press 1. In addition, the pre-tensioning of the tension rods 7 is relatively complicated because the tension nuts 10 and 11 can often only be mounted using heavy equipment. In the case of very large presses, such as the horizontal press 1 shown here, there is another difficulty that the tension rod 7 is not easy to handle because of the long length. These are just some of the reasons why the press frame 2 with conventional tension rods is undesirable.

Significant disadvantages of the conventional device are avoided by using the pre-tensioning device 20 shown in FIG.

The pre-tensioning device 20 has a tie rod 21 consisting essentially of a first rod head 22, a second rod head 23, and a single tensioning element 24.

The single tension element extends from the first rod head 22 to the second rod head 23 along the tension length 25 and absorbs the tension forces acting between the rod heads 22 and 23.

In this exemplary embodiment, both rod heads have a directional reversal device 26 for a single tensioning element 24 (the number is chosen by way of example only for the first rod head 22). As a result, it is possible to have a number of tension segments 27 acting between two rod heads 22 and 23 with only one single tension element 24, thus the ultimate strength of the tie rod 21. strength is several times the ultimate strength of a single tensile element 24.

At this time, the single tensile element 24 has more than one tensile distance compartment area 28 along the tensile length 25, such that the tensile force acting on the single tensile element 24 along the tensile length 25 is single. It is distributed over multiple tension segments 27 of tension element 24.

The single tension element 24 is thus arranged to pass and return several times from the first rod head 22 to the second rod head 23. In order to be able to pass the single tensile element 24 several times along the tensile length 25, the single tensile element 24 has a length that is several times the tensile length 25. In this exemplary embodiment, the single tension element 24 consists of a tension cable 28 in the form of a steel cable.

In alternative tie rods, it should be understood that other tensioning elements other than the tension cable 29 shown herein may also be used.

In this regard, in this exemplary embodiment, a single tension element 24 is rolled up with a single tension element 24 and is easily hardened during transport of the present pre-tensioning device 20. It is formed to be consolidated. The transport volume of the thus-rolled or hardened tie rods is preferably reduced by several times.

In this regard, the tie rod 21 may have a working height and one or more additional heights, such as, for example, installation height and / or transport height. Where the additional height may be less than half or less than one third of the working height.

Preferably, the entire tie rod 21 has a high tie rod height because a single tensioning element 24 may deflect different times in the rod head 22 or 23 according to usage requirements. Can be adjusted.

Particularly preferably a deflection is formed in the rod heads 22, 23 because the two rod heads 22, 23 have a bend region 30 for a single tensioning element 24, which region is convex. Is formed.

As shown herein, the two rod heads, unless a single tension element 24 is formed as an endless tension cable, which in each case can be arranged around the flexion zone 30 of the two rod heads 22 or 23. At least one of (22, 23), in this exemplary embodiment, it is advantageous for the second rod head 23 to have one device 31 for receiving the attachment device 32 of a single tensioning element 24 (count) Is selected only as an example). Thus, two ends of the single tensioning element 24 are advantageously attached to the second rod head 23, thereby simplifying the installation of the tie rod 21. In this regard, in the above exemplary embodiment the two rod heads 22 and 23 are formed asymmetrically. In this case, in an alternative embodiment, the rod head is formed symmetrically to reduce the number of different parts, and it is possible to attach the tensioning element 24 to only one of the rod heads but may also be attached to both rod heads. Should understand.

In order to be able to properly pre-tension the pre-tension device 20 or tie rod 21, the pre-tension device 20 has devices 35, 36 for tensioning the tie rod 21. Wherein the tensioning devices 35, 36 comprise tensioning elements 37 and 38 in the form of wedges (the number being selected by way of example only for the second tensioning device 36). In this exemplary embodiment, the wedge shaped tensioning elements 37, 38 are provided with contact surfaces 39 formed in the convex shape on the rod head side (see first tensioning device 35). Accordingly, the two rod heads 22, 23 have a contact surface 40 formed in a concave shape which is part of the tensioning device 35, 36 (the number on the first tensioning device 35 is selected only by way of example).

In addition, the tensioning elements 37, 38 in the form of individual wedges have a flat contact surface 41 (the number is selected by way of example only for the second tensioning device 36). The rod heads 22, 23 can be arranged on one component of the machine frame 50 (see FIG. 3), for which the component is a flat contact surface 41 as wedge-shaped tension elements 37, 38. Is implemented by

Similar to the known press 1 consisting of a press frame 2, a cylinder crossbar 3, a counter-crossbar 4, and a stand mechanism 5, the machine frame 50 shown in FIG. It has a crosshead 51, a lower crosshead 52 and a frame element 53 for positioning the two crossheads 51 and 52 apart from each other (the number being selected by way of example only).

In the exemplary embodiment above, the machine frame 50 comprises a pressing device 54 which is not shown in detail, but in the final analysis, how the tensile force to be absorbed by the tie rod 21 is applied. It does not play any role.

In this exemplary embodiment, the machine frame 50 has a pre-tensioning device 20 equipped with a total of four tie rods 21. The four tie rods 21 are identical in configuration to the tie rods 21 described in FIG. 2. In order to avoid repetition, the description of the tie rod 21 on the machine frame 50 will not be described again. Components or group of components having the same or the same effect are denoted by the same reference numerals.

In this regard, the machine frame 50 has a particularly simple configuration, in which a single tensioning element 24 has two rod heads 22 and 23 along the tension length 25 on each tie rod 21. This is because the single tensioning element 24 is arranged to be bent several times between the two rod heads 22 and 23, and is arranged to pass several times therebetween.

In this regard, the ultimate strength of each of the four tie rods 21 is greater than the ultimate strength of a single tensioning element 24 so that the machine frame 50 can withstand particularly high processing forces. .

It can be clearly seen that each rod head 22, 23 is mounted over the crossheads 51, 52 by a wedge-shaped tension element 37, 38, where the two crossheads 51 and 52 are the load heads. The support 55 is formed to mount the 22 and 23 (the number is selected only as an example).

The structure of this support 55 can be seen particularly well in detail 56 of FIG. 4. In this detail 56, the region of the upper crosshead 51 of the machine frame 50 is shown by way of example from FIG. 3.

The support 55 has a through-pass 57, through which the first rod head 22 can be inserted from below, which is the base surface of the through-pass 57. This is because 58 is chosen to be larger than the head base surface 59.

In the installation state of the tie rod 21, as shown in FIGS. 3 and 4, the rod head 22 is intersected with respect to the longitudinal expanse 60 of the through-pass 57. are arranged crosswise and are thus arranged on the support 55 available by the upper crosshead 51. Thus, preferably, the already pre-mounted tie rods 21 can be installed particularly simply on the already installed machine frame 50.

By means of the machine frame 50 constructed in this way, a pressing device 54 with a particularly compact configuration, which can withstand very large stresses despite the pre-tensioning device 20 with a particularly simple structure, is realized. do.

1: press 2: press frame
3: cylinder crossbar 4: counter-crossbar
5: stand mechanism 6: pressure support
7: tension rod 8: first end of the tension rod
9: second end of tension rod 10: first tension nut
11 second tension nut 12 pressing device
13: Anvil 14: Pressing Punch
15: drive unit 16: pressing force
20: pre-tensioning device 21: tie rod
22: first rod head 23: second rod head
24: single tensile element 25: tensile distance
26 direction reversing device 27 tensioning segment
28: tension distance compartment area 29: tension cable
30: bending area 31: receiving device
32: binding device 35: first tensioning device
36: second tension device 37: first wedge-shaped tension element
38: second wedge tension element 39: convex contact surface
40: concave contact surface 41: flat contact surface
50: machine frame 51: upper crosshead
52: lower crosshead 53: frame element
54 pressing device 55 support
56: detail 57: through-path
58: base surface 59: rod head base surface
60: longitudinal extension

Claims (32)

Apparatus 20 for pre-tensioning a machine frame 50, the apparatus 20 comprising first and second rod heads 22, 23 for arranging over the machine frame 50 and the rod Between the heads 22, 23 there is a tie rod 21 comprising a tensioning element 24 for absorbing the tensile force, the tensioning element 24 along the tensioning distance 25 of the tie rod 21. In the extending machine frame 50 pre-tensioning device 20,
One or more of the two load heads (22, 23) includes a direction reversing device (26) for the tensioning element (24). The method of claim 1,
The two rod heads (22, 23) comprise a directional reversal device (26) for the tensioning element (24). The method according to claim 1 or 2,
One or more of the rod heads 22, 23 has deflection regions 30 for the tensioning element 24, which regions are configured in convex form. ) Pre-tensioning device 20. The method of claim 3, wherein
The rod head (22, 23) has a bent region (30) for the tensioning element (24), which region is configured in a convex shape. The method according to any one of claims 1 to 4,
Machine frame (50) pre-tensioning device (20), characterized in that both ends of the tie rod (24) are attached to one rod head (23) of two rod heads (22, 23). 6. The method according to any one of claims 1 to 5,
One of the rod heads 22, 23 has a device 31 for pre-tensioning, characterized in that it has a device 31 for receiving the attachment device 32 of the tensioning element 24. Device 20. The method according to any one of claims 1 to 6,
Machine frame (50) pre-tensioning device (20), characterized in that the load head (22, 23) is formed asymmetrically. The method according to any one of claims 1 to 7,
One or more of the rod heads 22, 23, preferably both rod heads 22, 23 both have contact surfaces 39 for the tensioning elements 37, 38 of the tie rod 21 on the support. Machine frame (50) pre-tensile device (20), characterized in that it comprises. The method of claim 8,
Machine frame (50) pre-tensile device (20), characterized in that the contact surface (39) is formed in a concave shape. The method according to any one of claims 1 to 9,
The tensioning element (24) is characterized in that it is arranged to rotate about one or more of the load heads (22, 23) of the machine frame (50) pre-tensioning device (20). 11. The method according to any one of claims 1 to 10,
The tensioning element (24) is characterized in that it is arranged on both sides of one or more of the load heads (22, 23) of the machine frame (50) pre-tensioning device (20). 12. The method according to any one of claims 1 to 11,
Machine frame (50) pre-tensioning device (20), characterized in that the tension element (24) has more than one tension segment (27) acting between the rod heads (22, 23). 13. The method according to any one of claims 1 to 12,
The tensioning element (24) is characterized in that it is arranged to pass and return several times from the first rod head (22) to the second rod head (23). 14. The method according to any one of claims 1 to 13,
Mechanical frame (50) pre-tensioning device (20), characterized in that the tensioning element (24) is arranged to pass at least two times, preferably several times along the tension length (25). 15. The method according to any one of claims 1 to 14,
Machine frame (50) pre-tensioning device (20), characterized in that the tension element (24) has a length corresponding to several times the tension distance (25). The method according to any one of claims 1 to 15,
The tension element 24 has more than one tension distance partition region 28 along the tension distance 25, such that the tensile forces acting on the tension element 24 are dependent upon the number of tension elements 24. Machine frame 50 pre-tensioning device 20 characterized in that it is distributed across tension segments 27. The method according to any one of claims 1 to 16,
Machine frame (50) pre-tensioning device (20), characterized in that the tensioning element (24) is formed as a tension cable (29), in particular a steel cable. The method according to any one of claims 1 to 17,
Machine frame (50) pre-tensioning device (20), characterized in that the tensioning element (24) is formed to be rolled up. The method according to any one of claims 1 to 18,
Machine frame (50) pre-tensioning device (20), characterized in that the tension element (24) is formed as an endless tension cable. 20. The method according to any one of claims 1 to 19,
Machine frame (50) pre-tensioning device (20), characterized in that the tie rod (21) has more than one tensioning element (24). The method according to any one of claims 1 to 20,
Machine frame (50) pre-tensioning device (20), characterized in that the tie rod (21) is adjustable in height. 22. The method according to any one of claims 1 to 21,
The tie rod 21 has a working height and one or more additional heights, such as, for example, installation height and / or transport height, where the additional height is the working height. Machine frame 50 pre-tensioning device 20, characterized in that it may be less than half or less than 1/3. The method according to any one of claims 1 to 22,
Machine frame (50) pre-tensioning device (20), characterized in that the pre-tensioning device (20) comprises at least two tie rods (21), preferably four tie rods (21). 24. The method according to any one of claims 1 to 23,
The pre-tensioning device 20 comprises devices 35, 36 for tensioning the tie rods 21, which tension devices 35, 36 are preferably wedge-shaped tension elements 37, preferably 2. Mechanical frame (50) pre-tensioning device (20), characterized in that it has two wedge-shaped tensioning elements (37, 38). A machine frame 50, having a lower crosshead 52 and an upper crosshead 51 to absorb processing forces entering into the machine frame 50, the two crossheads 51, 52. Have frame elements 53 for positioning them apart from each other, and have one or more tie rods 21 acting between the two crossheads 51, 52, the tie rods 21 being the tie rods 21. It has two rod heads 22, 23 at its end, and has a tensioning element 24 acting between the two rod heads 22, 23, the tie rod 21 having the rod heads 22, 23. In the machine frame 50 mounted on the crossheads 51 and 52 by means of
The tension element 24 is arranged several times between the rod heads 22, 23 of the tie rod 21, the tension element 24 being around the rod head of one or more of the rod heads 22, 23. Machine frame 50 arranged to bend. The method of claim 25,
The tension element 24 passes several times from the first rod head 22 to the second rod head 23 so that the ultimate strength of the tie rod 21 is greater than the ultimate strength of the tension element 24. And / or several times from the second rod head (23) to the first rod head (22). Machine frame 50, having a lower crosshead 52 and an upper crosshead 51 to absorb processing forces entering into the machine frame 50, the two crossheads 51, 52 being positioned apart from each other Having a frame element 53, having at least one tie rod 21 acting between the two crossheads 51, 52, the tie rod 21 having two ends at the end of the tie rod 21. Two rod heads 22, 23, with tension elements 24 acting between the two rod heads 22, 23, the tie rods 21 being crossed by the rod heads 22, 23. In the machine frame 50 mounted on the heads 51 and 52,
Supports 55 are formed for mounting at least one of the load heads 22, 23, and at least one of the support 55 passes through-path 57 for the tensioning element 24. And the through-path (57) having a base surface that is larger than the rod head base surface. The method of claim 27,
The machine frame (50), characterized in that the rod head (22, 23) is mounted on the support (55) to be arranged to intersect with respect to the longitudinal extension of the through-path (57). 29. The method of claim 27 or 28,
The support 55 includes a device 35 for tensioning the tie rod 21 with tension elements 37, 38, which tension elements 37, 38 are in contact with the contact surface of the support 55. Machine frame (50), characterized in that arranged between the contact surface of the rod head (22, 23). Machine frame 50, having a lower crosshead 52 and an upper crosshead 51 to absorb processing forces entering into the machine frame 50, the two crossheads 51, 52 being positioned apart from each other Having a frame element 53, having at least one tie rod 21 acting between the two crossheads 51, 52, the tie rod 21 having two ends at the end of the tie rod 21. Two rod heads 22, 23, with tension elements 24 acting between the two rod heads 22, 23, the tie rods 21 being crossed by the rod heads 22, 23. In the machine frame 50 mounted on the heads 51 and 52,
Supports 55 are formed for mounting at least one of the load heads 22, 23, and at least one of the support 55 passes through-path 57 for the tensioning element 24. A support pedestal is arranged between the support 55 and the rod head ends of the rod heads 22, 23, wherein the through-pass 57 is bridged by the support pedestal. Machine frame (50). 31. The method according to any one of claims 25 to 30,
25. Machine frame (50), characterized in that a pre-tensioning device (20) according to any one of the preceding claims is formed for pre-tensioning the machine frame (50). In a pressing device or a drawing device having a machine frame 50 and a device 20 for pre-tensioning the machine frame 50,
Pressing or drawing device comprising a mechanical frame (50) and / or a pre-tensioning device (20) according to any one of the preceding claims.

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