Crosshead for use as an upper beam in a punch press

Abstract

The invention relates to a cross head (1) for use as an upper beam (50) and / or a lower beam (60) in a punch (100), in particular in a free forging punch or a die forging punch, comprising an upper cover plate (2) and a lower base plate (5) connected to the upper cover plate (2) by a first side bracket (3) and a second side bracket (4), wherein the first side bracket (3) is arranged in the region of a first distal end (6) of the cross head (1) and the second side bracket (4) is arranged in the region of a second distal end (7) of the cross head (1), characterized in that the cross head (1) has a frame support structure (8) between the two side brackets (3, 4), by which the upper cover plate (2) and the lower base plate (5) are additionally connected to one another.

Description

TECHNICAL FIELD

[0001] The present invention relates to a cross head for use as an upper beam in a punch, in particular a free forging punch or a die forging punch, and to a punch, in particular a free forging punch or a die forging punch, comprising a cross head according to the invention. BACKGROUND

[0002] Such cross heads form components of large structural type. Since cross heads are subjected to enormous pressures of 1 MN to 200 MN when loaded in the punch, they are designed in a solid and strong construction. Therefore, cross heads known from the prior art usually have a weight of several hundred tons.

[0003] Due to the continuing trend towards larger equipment and machines, the castings have now reached the limits of foundry technology in terms of weight and material usage. In addition, such components also present additional logistical problems, since not only handling but also their transport is very complex.

[0004] A cross head designed in a solid and strong construction is known, for example, from the patent document DE 10 2013 108 299 A1. The cross head, which is constructed as an upper beam, is intended for use in a forging punch, and comprises an upper cover plate and a lower base plate, which is connected to the upper cover plate by means of a first and a second side face support made of solid material. Here, the upper cover plate is additionally supported by a solid side wall extending axially between the side face supports.

[0005] The German patent document DE 103 44 635 A1 relates to a machine tool, in particular a forming machine tool having a machine frame and at least one tool or tool holder supported on the machine frame, wherein the machine frame has at least one support structure assembly with a plurality of struts, wherein the respective struts are connected to one another in nodes and the tool or tool holder is supported on at least one node of the support structure assembly.

[0006] Furthermore, a punch bed is known from the Chinese patent application CN 104 999 693 A, which comprises two upper and lower outer frames, wherein the two upper and lower outer frames are arranged parallel to one another, wherein two lateral side plates and two lateral longitudinal beams are arranged between the two upper and lower outer frames, wherein the two lateral side plates and the two lateral longitudinal beams are arranged perpendicular to the two upper and lower outer frames, and a central tube body is arranged in the middle of the two upper and lower outer frames, wherein the central tube body is perpendicular to the two upper and lower outer frames and the central tube body is a circular through-hole. SUMMARY

[0007] Against this background, it is the object of the application to provide an improved crosshead and an improved press, in particular an improved free forging press or die forging press, compared to the prior art.

[0008] This object is achieved by a crosshead and by a press.

[0009] The crosshead is intended to be used as an upper beam in a press, in particular a free forging press or a die forging press, and comprises an upper cover plate and a lower base plate which are connected to the upper cover plate by means of a first side bracket and a second side bracket, wherein the first side bracket is arranged in a first distal region of the crosshead and the second side bracket is arranged in a second distal region of the crosshead.

[0010] According to the application, the crosshead has a frame support structure between the two side brackets, by means of which the upper cover plate and the lower base plate are additionally connected to one another. The frame support structure according to the application allows sufficient flexibility in the structural design between the overall weight and the mechanical parameters here. In this way, the overall weight can be reduced by up to 20% while maintaining the mechanical parameters, for example the stresses that occur when maintaining the rigidity and / or the load bearing. Due to the overall weight of several tons, this has a positive effect not only on the manufacturing costs, but also in particular on the transport of such a crosshead. If the weight reduction is not a priority, the mechanical properties can be significantly improved while maintaining the overall weight.

[0011] Furthermore, a further advantage is that better access to components that have been installed in the installed state of the crosshead, such as pressure cylinders and / or adjustment cylinders, can be achieved by means of the frame support structure.

[0012] Further advantageous design options of the application are given below. The features listed individually therein can be combined with one another in a technically meaningful manner and can define further design options of the application. Furthermore, the respective features are explained and explained in more detail in the description, and further preferred design options of the application are shown in the description.

[0013] It is advantageously provided that the two side brackets also have a frame support structure by means of which a further weight reduction can be achieved.

[0014] According to the application, the upper cover plate and the lower base plate each have a centrally arranged and aligned opening which defines a middle region of the crosshead and serves to connect the crosshead to the main cylinder of the press. A crosshead of this construction is preferably used as an upper beam.

[0015] According to the application, the upper cover plate and the lower base plate each have further openings aligned with one another on both sides of the central opening, which serve to connect to the first and second pressure cylinders of the press.

[0016] Advantageously, the frame support structure does not require cylindrical sleeves here to arrange the respective cylinders on the cross head and to fix the cylinders to the cross head.

[0017] It is furthermore preferably provided that the frame support structure comprises a plurality of reinforcing ribs arranged around the two central openings, which connect the upper cover plate and the lower bottom plate in the middle region of the cross head. The reinforcing ribs serve here primarily to brace the upper cover plate, which bends under load due to the pressure of the centrally located main cylinders.

[0018] In an embodiment variant, the upper cover plate of the cross head, in particular of the upper beam, is configured in an arc shape. Since the bending of an upper cover plate thus configured leads to a higher load at the two distal ends of the upper cover plate, it is preferably provided that the reinforcing ribs are configured in a V shape to counteract this higher load.

[0019] In an alternative embodiment variant, the upper cover plate of the cross head, in particular of the upper beam, is flat. Since the bending of such an upper cover plate does not lead to a higher load at the two distal ends of the upper cover plate, it is preferably provided that the reinforcing ribs are configured vertically.

[0020] It is furthermore provided according to the invention that the frame support structure comprises a plurality of laterally extending stress ribs, which extend from the middle region of the lower bottom plate towards the end face of the upper cover plate and are firmly connected to the side supports. Through the stress ribs, the stresses occurring during forging can be purposefully conducted from the stress center outwards to the tie rods and then into the side supports of the press.

[0021] It is furthermore provided according to the invention that two stress ribs arranged parallel to each other are each connected to each other by a flat element, which also has an opening aligned with the two cylinder openings. The plane additionally formed between the respective stress ribs allows a better flow of forces, which in turn can improve the conduction of the stresses occurring during forging.

[0022] The cross head is preferably manufactured by a forming process, in particular by a casting process. The forming process is particularly advantageous, since very complex structures can be shaped thereby. In an alternative embodiment variant, the cross head is manufactured by a 3D printing process.

[0023] In another aspect, the invention relates to a press, in particular a free forging press or a die forging press, comprising a cross head according to the invention. Such a press has a large design and allows the machining of forgings at a pressure of at least 1 MN to 100 MN, more preferably at 8 MN to 200 MN. BRIEF DESCRIPTION OF DRAWINGS

[0024] The present invention, together with technical field and its objectives, are explained in greater detail below. It should be noted that the present invention is not limited to the illustrated exemplary embodiments. In particular, unless explicitly stated otherwise, parts of the facts explained in the figures can be extracted and combined with other components and cognitions from the present description and / or the figures. In particular, it is pointed out that the figures and in particular the shown scales are only schematic. Identical reference signs denote identical objects, so that the explanations of other figures can be used as a supplement if necessary. The figures show:

[0025] Figure 1 is a perspective view of a first embodiment variant of a crosshead according to the present invention;

[0026] Figure 2 is a side view of the embodiment variant shown according to Figure 1

[0027] Figure 3 is a perspective view of a second embodiment variant of a crosshead according to the present invention;

[0028] Figure 4 is a side view of the embodiment variant shown according to Figure 3

[0029] Figure 5 is a view of an embodiment variant of a punch press with a crosshead according to the second embodiment variant. DETAILED DESCRIPTION

[0030] Figure 1 A first embodiment variant of a crosshead 1 according to the present invention is shown, which in the currently shown embodiment variant is intended to be used as an upper beam 50 in a punch press, for example a free forging punch press 100 (see Figure 5 ) or the like. The crosshead 1 comprises an upper cover plate 2 and a lower base plate 5 which is connected to the upper cover plate 2 by means of a first side bracket 3 and a second side bracket 4. The first side bracket 3 is arranged in the region of a first distal end 6 of the crosshead 1 and the second side bracket 4 is arranged in the region of a second distal end 7 of the crosshead 1. As can be seen from Figure 1 , the crosshead 1 has a frame support structure 8 between the two side brackets 3, 4, by means of which the upper cover plate 2 and the lower base plate 5 are additionally connected to one another.

[0031] In order to arrange the main cylinder 110, as Figure 2 ​​As shown, the upper cover plate 2 and the lower base plate 5 each have a centrally arranged and aligned opening 9, 10. The area around the central openings 9, 10 forms a middle region 11 of the cross head 1. On both sides of the two central openings 9, 10, the upper cover plate 2 and the lower base plate 5 each comprise further openings 12, 13, 14, 15 for connecting the cross head 1 in the form of an upper beam 50 to the first and second pressure cylinders 111, 112 of the press 100.

[0032] In the presently shown embodiment variant, the frame support structure 8 has four reinforcing ribs 16, 17, 18, 19 arranged around the two central openings 9, 10, which connect the upper cover plate 2 and the lower base plate 5 to each other in the middle region 11 of the cross head 1. From Figure 1 It can be seen that the upper cover plate 2 is curved in the shown embodiment variant, while the lower base plate 5 is flat. Due to this curved design of the upper cover plate 2, the reinforcing ribs 16, 17 and the reinforcing ribs 18, 19 are arranged in a V-shape with respect to each other, respectively.

[0033] Furthermore, in the presently shown embodiment variant, the frame support structure 8 comprises four laterally extending stress ribs 20, 21, 22, 23, which each extend from the middle region 11 of the lower base plate 5 in the direction of the end faces 24, 25 of the upper cover plate 2 and are firmly connected to the respective side bracket 3, 4. The stress ribs 20, 22 and the stress ribs 21, 23 are each connected to each other by means of a flat element 26, 27. Each of the two flat elements 26, 27 additionally has an opening 28, 29. The opening 28 is here aligned with the pressure cylinder openings 14, 15, while the opening 29 is aligned with the two pressure cylinder openings 12, 13.

[0034] From Figure 1 It can also be seen that, in the presently shown embodiment variant, the two side brackets 3, 4 also comprise a frame support structure 30, 31, which is formed by a plurality of support ribs 32, 33, respectively. The cross head 1 is connected to the side brackets 120, 121 of the press 100 via the two side brackets 3, 4 by means of tie rods 113, 114, 115, 116, which extend through tie rod openings 34, 35, 36, 37 of the cross head 1. Figure 5

[0035] Figure 2 The cross head 1 according to the embodiment variant shown in Figure 1 is again shown in a side view.

[0036] Figure 3 ​A second embodiment variant of a crosshead 1 according to the application is shown, which likewise comprises an upper cover plate 2 and a lower base plate 5 connected to the upper cover plate 2 by means of a first side bracket 3 and a second side bracket 4.

[0037] The first side bracket 3 is arranged in the region of a first distal end 6 of the crosshead 1 and the second side bracket 4 is arranged in the region of a second distal end 7 of the crosshead 1. The presently shown crosshead 1 also has a frame support structure 8 between the two side brackets 3, 4, by means of which the upper cover plate 2 and the lower base plate 5 are additionally connected to one another.

[0038] In order to arrange the main cylinder 110, as Figure 5 is shown, the upper cover plate 2 and the lower base plate 5 each have a centrally arranged and aligned opening 9, 10. The region around the central openings 9, 10 forms a middle region 11 of the crosshead 1 here. On both sides of the two central openings 9, 10, the upper cover plate 2 and the lower base plate 5 each comprise further openings 12, 13, 14, 15 for connecting the crosshead 1 in the form of the upper beam 50 to the first pressure cylinder 111 and the second pressure cylinder 112 of the press 100.

[0039] In the presently shown embodiment variant, the frame support structure 8 has a plurality of vertically extending reinforcing ribs 38, which connect the upper cover plate 2 and the lower base plate 5 to one another in the middle region 11 of the crosshead 1. As can be seen from the figures, the plurality of reinforcing ribs 38 is arranged on the circumference of the two central openings 9, 10. In contrast to the embodiment variant shown in Figure 1 and Figure 2 The upper cover plate 2 is flat, like the lower base plate 5, unlike the embodiment variant shown.

[0040] Furthermore, in the presently shown embodiment variant, the frame support structure 8 comprises four transversely extending stress ribs 20, 21, 22, 23, which each extend in the direction of the end faces 24, 25 of the upper cover plate 5 from the middle region 11 of the lower base plate 5 and are firmly connected to the respective side bracket 3, 4. The stress ribs 20, 22 and the stress ribs 21, 23 are likewise firmly connected to one another by means of flat elements 26, 27, respectively, wherein each of the two flat elements 26, 27 additionally has an opening 28, 29. The opening 28 is aligned with the pressure cylinder openings 14, 15, and the opening 29 is aligned with the two pressure cylinder openings 12, 13.

[0041] From Figure 3 It can also be seen that, in the presently shown embodiment variant, the two side brackets 3, 4 each have a recess 39. The crosshead 1 is connected to the side brackets 120, 121 of the press 100 via the two side brackets 3, 4 by means of tie rods 113, 114, 115, 116 (seeFigure 5 ) which extends through the rod openings 34, 35, 36, 37 of the cross head 1.

[0042] Figure 4 The cross head 1 according to the second embodiment variant is shown again in a side view. Figure 3

[0043] Figure 5 An embodiment variant of the press 100 with an upper beam 50 and a lower beam 60 is shown which substantially corresponds to the second embodiment variant of the cross head 1. The currently shown press 100 is a free forging press as is known to the person skilled in the art from the prior art.

[0044] The application is not limited to the combination of features defined, but can also be defined by any other combination of all the individual features disclosed. This means that in principle each single feature can actually be deleted or replaced by at least one single feature disclosed elsewhere in the present application.

[0045] List of reference signs:

[0046] 1 cross head

[0047] 2 upper cover plate

[0048] 3 side support

[0049] 4 side support

[0050] 5 lower bottom plate

[0051] 6 distal end

[0052] 7 distal end

[0053] 8 frame support structure

[0054] 9 opening

[0055] 10 opening

[0056] 11 intermediate region

[0057] 12 pressure cylinder opening

[0058] 13 pressure cylinder opening

[0059] 14 pressure cylinder opening

[0060] 15 pressure cylinder opening

[0061] 16 stiffener

[0062] 17 stiffener

[0063] 18 stiffener ​

[0064] 19 stiffener

[0065] 20 stress rib

[0066] 21 stress rib

[0067] 22 stress rib

[0068] 23 stress rib

[0069] 24 end face

[0070] 25 end face

[0071] 26 flat element

[0072] 27 flat element

[0073] 28 opening

[0074] 29 opening

[0075] 30 frame support structure

[0076] 31 frame support structure

[0077] 32 support rib

[0078] 33 support rib

[0079] 34 tie rod opening

[0080] 35 tie rod opening

[0081] 36 tie rod opening

[0082] 37 tie rod opening

[0083] 38 stiffener

[0084] 39 recess

[0085] 50 upper beam

[0086] 60 lower beam

[0087] 100 punch press

[0088] 110 main cylinder

[0089] 111 pressure cylinder

[0090] 112 pressure cylinder

[0091] 113 tie rod

[0092] 114 tie rod

[0093] 115 tie rod

[0094] 116 tie rod

[0095] 120 side support

[0096] 121 side support

Claims

1. A crosshead (1) for use as an upper beam (50) and / or a lower beam (60) of a punch press (100), the crosshead comprising an upper cover plate (2) and a lower base plate (5) connected to the upper cover plate (2) by a first side bracket (3) and a second side bracket (4), wherein, The first side bracket (3) is arranged in the region of a first distal end (6) of the cross head (1) and the second side bracket (4) is arranged in the region of a second distal end (7) of the cross head, wherein the cross head (1) has a frame support structure (8) between the two side brackets (3, 4), the upper cover plate (2) and the lower bottom plate (5) being additionally connected to each other by the frame support structure, wherein the upper cover plate (2) and the lower bottom plate (5) each have a centrally arranged and aligned opening (9, 10) defining a middle region (11) of the cross head (1) and for connection to a main cylinder (110) of the press (100), wherein the upper cover plate (2) and the lower bottom plate (5) each have, on both sides of the central opening (9, 10), pressure cylinder openings (12, 13, 14, 15) aligned with each other for connection to a first pressure cylinder (111) and a second pressure cylinder (112) of the press (100), wherein the frame support structure (8) comprises a plurality of laterally extending stress ribs (20, 21, 22, 23) extending from the middle region (11) of the lower bottom plate (5) towards an end face of the upper cover plate (2) and being firmly connected with the side brackets (3, 4), wherein two stress ribs (20, 21, 22, 23) arranged parallel to each other are each connected to each other by a flat element (26, 27), each flat element (26, 27) having an opening (28, 29) aligned with a pressure cylinder opening (12, 13, 14, 15).

2. The crosshead (1) according to claim 1, wherein The first side bracket (3) and the second side bracket (4) have further frame support structures (30, 31).

3. The cross head (1) according to claim 1 or 2, wherein The frame support structure (8) comprises a plurality of reinforcing ribs (16, 17, 18, 19, 38) arranged around the two central openings (9, 10) connecting the upper cover plate (2) and the lower bottom plate (5) to each other in the middle region (11) of the cross head (1).

4. The crosshead (1) according to claim 3, wherein The upper cover plate (2) is configured as an arc and the reinforcing ribs arranged around the two central openings (9, 10) are configured as V-shaped.

5. The crosshead (1) according to claim 3, wherein The upper cover plate (2) is flat and the reinforcing ribs arranged around the two central openings (9, 10) are vertical.

6. The cross head (1) according to claim 1 or 2, wherein The cross head (1) is manufactured by a forming process.

7. The cross head (1) according to claim 6, wherein the cross head (1) is manufactured by a casting process.

8. The crosshead (1) according to the preceding claim 1 or 2, wherein The cross head (1) is manufactured by a 3D printing process.

9. The cross head (1) according to the preceding claims 1 or 2, for use in a free forging press or a die forging press.

10. A press (100) comprising the cross head (1) according to any one of claims 1 to 8.

11. The press (100) according to claim 10, wherein the press (100) is a free forging press or a die forging press.

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