Forming Punching Device

Abstract

The punching device (1) for forming a workpiece (100) comprises a punch holder unit (2) including an upper support (3) rotatable about a processing axis (X), a punch holder body (4) accommodating a plurality of upper forming tools (31), and an upper striking element (5) movable parallel to the processing axis (X) so as to selectively interact with the defined upper forming tools (31), a lower support (13) rotatable about the processing axis (X), a die holder body (14) accommodating a plurality of lower forming tools (32), and an upper striking element (5) movable parallel to the processing axis (X) so as to selectively interact with the defined lower forming tools (32). and a die holder unit (12) including a lower striking element (15) movable linearly along the processing axis (X) and rotatably about the processing axis (X), wherein the lower striking element (15) is movable linearly between a non-operating position (A) in which the lower striking element (15) is locked against rotation and does not rotate with the lower support (13), a first operating position (B) in which the lower striking element (15) is connected to the lower support (13) so as to rotate together with the lower support (13), and a second operating position (C) in which the lower striking element (15) partially pushes the lower forming tool (32) out of the die holder body (14).

Description

[Technical Field]

[0001] The present invention relates to a machine tool for processing workpieces and / or sheet metal, and in particular to a form punching device that can be associated with a punching machine for forming and / or deforming workpieces. [Background technology]

[0002] Punching machines are known which are provided with a punching device called a punching head which supports and moves linearly along a machining axis a tool which acts on a workpiece, usually a sheet metal, in conjunction with an underlying die or receiving tool. The die is generally fixed to the working surface of the punching machine which supports the workpiece.

[0003] The first type of punching tool includes punches or punch inserts that can cut, shear, or punch a workpiece to create holes, slots, variously shaped through openings or separation contours, division cuts, or create deep draws facing (i.e., downward) the work surface. Each die includes a cavity having a shape generally complementary to that of the respective punch to receive the punch during processing.

[0004] The second type of tool includes forming or deforming tools that can plastically deform a workpiece to create deep draws, bridges, slits, etc. of various shapes and sizes that protrude from the opposite side (i.e., upward) of the working surface.

[0005] The forming process may be static, i.e., the workpiece remains fixed during processing, or dynamic, i.e., the workpiece is moved, usually to create elongated deformations such as steps, ribs, slits, etc. Since the deformation of the workpiece is opposite the working surface (upward forming), the die includes a lower forming tool having a shape complementary to that of the upper forming tool and linearly movable with and in the opposite direction to the upper forming tool. The lower forming tool typically comprises a wheel, roller, or disk having a suitably shaped profile and rotatable about an axis perpendicular to the processing axis.

[0006] In single-tool punching heads, the tool is mounted on a support element called a spindle, which is driven linearly along and rotated about a processing axis by a respective actuator.

[0007] Linear movement along the two opposing machining axes allows the tool to perform a machining stroke and a return stroke in the punching process, while rotational movement about the machining axis allows the punching tool to rotate and change its angular orientation (index) to perform different cuts or punches on the workpiece.

[0008] A multi-tool punching head comprises a plurality of punching tools and a striking element called a ram element, which is moved linearly along a machining axis and acts on a selected punching tool by imparting to the selected punching tool the kinetic energy and linear motion required to perform machining on the workpiece.

[0009] The punching tool or punch is housed in a tool holder device fixed to the punching head and positioned between the ram element and the workpiece. The tool holder device typically includes a rotatable drum arranged circumferentially about the drum axis of rotation with the tool slidably housed therein.

[0010] Each multi-tool punching head is also multi-die, i.e., provided with a number of dies equal to the number of respective punches, which are rotatable about a processing axis to allow angular orientation of the punches.

[0011] However, known multi-tool punching heads cannot mount form tools because the die cannot accept multiple lower form tools, and in particular, the die cannot select, angularly orient, and then move such tools along and about the processing axis to raise them toward the upper form tool and contact the workpiece.

[0012] U.S. Patent Application Publication No. 2019 / 366411 discloses a set of punches and dies configured to perform a forming operation on a sheet material and a selection device that can select punches and dies associated with a punching machine to be engaged by a striking element of the punching machine and can force or enable movement of unselected dies away from the sheet material while the sheet material is being processed so as not to impact or damage the sheet material. [Prior art documents] [Patent documents]

[0013] [Patent Document 1] U.S. Patent Application Publication No. 2019 / 366411 Summary of the Invention [Problem to be solved by the invention]

[0014] One object of the present invention is to improve known punching devices, in particular shaping punching devices.

[0015] Another object is to implement a punching apparatus provided with a plurality of upper and lower forming tools that can be selected, angularly oriented, and actuated quickly and efficiently.

[0016] A further object is to implement a punching device which allows a number of different forming or deformation operations to be optimally carried out while the workpiece is fixed or moving.

[0017] Another object is to provide a forming punching device having a simple and compact structure and small dimensions. [Means for solving the problem]

[0018] These and other objects are achieved by a punching device according to one or more of the following claims. [Brief explanation of the drawings]

[0019] The invention can be better understood and practiced with reference to the accompanying drawings, which show exemplary and non-limiting embodiments. [Figure 1] FIG. 2 is a front view of a punch holder unit of the punching device of the present invention. [Figure 2] 2 is a longitudinal section along line II-II of FIG. 1, with the selected upper forming tool in a retracted, non-operating position; [Figure 3] FIG. 2 is a perspective view of the punch holder unit of FIG. 1. [Figure 4] FIG. 2 is a bottom view of the punch holder unit of FIG. 1. [Figure 5] FIG. 2 is an exploded view of the punch holder unit of FIG. [Figure 6] FIG. 2 is a front view of a die holder unit of the punching device of the present invention. [Figure 7] 7 is a longitudinal cross-sectional view of the die holder unit and the drive means of the punching device taken along line VII-VII in FIG. 6. [Figure 8] FIG. 7 is a perspective view of the die holder unit of FIG. 6. [Figure 9] FIG. 7 is a top view of the die holder unit of FIG. 6. [Figure 10] FIG. 7 is an exploded view of the die holder unit of FIG. 6. [Figure 11] 1 is a longitudinal cross-sectional view of a punching device of the present invention attached to a workpiece; [Figure 12] 1A-1C are longitudinal sectional views of the lower striking element of the die holder unit of the punching device of the present invention, driven by the drive means, in different operating configurations; [Figure 13] 1A-1C are longitudinal sectional views of the lower striking element of the die holder unit of the punching device of the present invention, driven by the drive means, in different operating configurations; [Figure 14] 1A-1C are longitudinal sectional views of the lower striking element of the die holder unit of the punching device of the present invention, driven by the drive means, in different operating configurations;

[0020] 1 to 14, there is shown a punching device 1 according to the invention which can be attached to a punching machine of known type (not shown) and which is arranged to form and / or deform a workpiece 100, in particular a sheet metal.

[0021] The punching device 1 shown in cross section in Figure 11 comprises a punch holder unit 2 having a plurality of upper forming tools or forming punches 31, for example three, and a die holder unit 12 having a plurality of lower forming tools or forming dies 32, for example a number equal to the number of upper forming tools 31.

[0022] The punch holder unit 2 comprises an upper support 3 rotatable about a processing axis X, a punch holder body 4 rotatably connected to the upper support 3 and arranged to slidably accommodate a plurality of upper forming tools 31, and an upper striking element 5. The upper striking element 5 is slidably supported by the upper support 3 and is movable parallel to the processing axis (X) to selectively interact with the defined upper forming tools (31) to partially push the defined upper forming tools (31) out of the punch holder body (4) to interact with the workpiece (100), as will be better explained below.

[0023] The die holder unit 12 comprises a lower support 13 rotatable about the processing axis X, a die holder body 14 fixed to the lower support 13 and arranged to slidably accommodate a plurality of lower forming tools 32, and a lower striking element 15.

[0024] The lower striking element 15 is housed in the lower support 13 and is linearly movable along and rotatably about the processing axis X for selective interaction with a defined lower forming tool. The lower striking element 15 is linearly movable between a non-operating position A in which the lower striking element 15 is locked against rotation by a first stop means 21 and does not rotate with the lower support 13, an operating position B in which the lower striking element 15 is connected to the lower support 13 by a second stop means 22 for rotation therewith about the processing axis X, and a second operating position C in which the lower striking element 15 partially pushes the defined lower forming tool 32 out of the die holder body 14 for interaction with the overlying workpiece 100.

[0025] 6-11 , the die holder body 14 includes a plurality of lower seats 16, each adapted to receive a lower tool holder element 34 associated with a respective lower forming tool 32. Each lower tool holder element 34 includes a first end 34a configured, among other things, to receive and support the respective lower forming tool 32 and a second end 34b adapted to interact with a lower striking element 15.

[0026] In the illustrated embodiment, the lower forming tools 32 include shaped wheels or rollers mounted on respective lower tool holder elements 34 and rotatable about respective first axes of rotation Y1 generally perpendicular to the processing axis X.

[0027] The die holder unit 12 further comprises a plurality of lower thrust elements 17 slidably connected to the die holder body 14 and arranged to support respective lower tool holder elements 34 of the lower forming tools 32. Each lower thrust element 17 is abutted by a lower striking element 15 to move the respective lower tool holder element 34 and thus the corresponding lower forming tool 32 along the processing axis X, as will be better explained below.

[0028] Each lower thrust element 17 has a substantially prismatic shape, in particular is approximately perpendicular to the machining axis X, and comprises two opposite and parallel abutment walls intended respectively to abut against the second end 34b of the lower toolholder element 34 (to support the lower toolholder element and the lower forming tool 32 associated with it) and to be abutted by the lower striking element 15.

[0029] The lower striking element 15 is slidable within the cavity 23 of the lower support 13 and has a generally cylindrical body 15c.

[0030] The lower striking element 15 is slidably connected to the die holder body 14 by a first guide pin 20 having a first upper end 20a fixed to the die holder body 14 and a second lower end 20b slidably coupled to a seat 27 of the lower striking element 15. The first guide pin 20 is substantially coaxial with the processing axis X.

[0031] A first elastic means 28 is interposed between the lower striking element 15 and the die holder body 14 and is configured to elastically maintain the lower striking element 15 spaced apart from the die holder body 14 in the non-operating position A.

[0032] The first resilient means 28 include, for example, respective cylindrical helical springs attached to the first guide pins 20 .

[0033] The lower striking element 15 also includes a first abutment portion 15a extending from the body 15c and configured to abut against a defined thrust element 17 so as to move the corresponding lower forming tool 32.

[0034] The die holder unit 12 includes second elastic means 18 interposed between each lower thrust element 17 and the die holder body 14 and configured to elastically maintain the lower thrust elements 17 spaced apart from the die holder body 14 in their respective non-operating positions E when not abutted or pressed by the lower striking elements 15. Each lower thrust element 17 is slidably connected to the die holder body 14 by one or more, for example two, second guide pins 19 to which the second elastic means 18, each including a cylindrical helical spring, is attached.

[0035] The first stopping means 21 comprises a first tab adapted to engage with a longitudinal groove 24 made in the outer wall of the lower striking element 15, in particular parallel to the machining axis X. The first tab 21 is connected, for example, to a support means 80 of a punching machine to which the die holder unit 12 is attached.

[0036] The second stop means 22 is fixed to the lower support 13 and includes a second tab configured to engage with a longitudinal groove 24 of the lower striking element 15 .

[0037] The punching device 1 also comprises drive means 25, 26 which act on the lower striking element 15 in the operating positions B, C to move it linearly in the thrust direction F, in particular towards the punch holder unit 2 above.

[0038] In particular, the drive means 25, 26 act against a second abutment 15b of the lower striking element 15 opposite the first abutment 15a.

[0039] In the illustrated embodiment, the drive means 25, 26 include a first linear actuator 25 adapted to move the lower striking element 15 between a non-operating position A and a first operating position B, and a second linear actuator 26 adapted to move the lower striking element 15 between the first operating position B and a second operating position C.

[0040] Alternatively, the drive means may include a single linear actuator that can controllably move the lower striking element 15 between the inoperative position A and the first operative position B and between the first operative position B and the second operative position C.

[0041] In particular, the drive means 25, 26 can be integrated into the punching machine to which the punching device 1 is attached.

[0042] The die holder body 14 includes an upper wall 14a adapted to abut and support the workpiece 100. The upper wall 14a includes a plurality of lower seats 16 that house lower tool holder elements 34 with respective lower forming tools 32 associated therewith.

[0043] 1 to 6, the punch holder body 4 of the punch holder unit 2 comprises a plurality of upper seats 6 each adapted to receive a respective upper thrust element 7 and upper tool holder element 33 associated with a corresponding upper forming tool 31. Each upper thrust element 7 is interposed between the upper striking element 5 and a respective upper tool holder element 33.

[0044] In particular, each upper thrust element 7 has an abutment end 7a configured to interact with a respective striking portion 5a of the upper striking element 5 and a connection end 7b coupled to the upper tool holder element 33.

[0045] Each upper thrust element 7 is slidably engaged with the first guide portion 6a of the respective upper seat portion 6, and the upper tool holder element 33 connected to the upper thrust element 7 is slidably engaged with the underlying second guide portion 6b of the upper seat portion 6.

[0046] The upper thrust element 7 comprises an upper part 70 having a generally cylindrical pin shape and including an abutment end 7a, and a lower part 71 having a prismatic column shape and including a connecting end 7b. The cylindrical wall of the upper part 71 has a longitudinal flat part 70c that prevents the upper thrust element 7 from rotating about its longitudinal axis within the first guide part 6a of the respective upper seat part 6.

[0047] In the illustrated embodiment, the upper forming tools 31 include respective wheels or formed rolls or discs mounted on the upper tool holder elements 33 and rotatable about respective second axes of rotation Y2 that are substantially perpendicular to the processing axis X.

[0048] The punch holder unit 2 is fixed to the lower part of the punch holder body 4 and comprises a closing disk 35 provided with a through opening 35a through which the upper forming tool 31 can escape.

[0049] The punch holder unit 2 also comprises an abutment element 8 slidably connected to the upper support 3 and to which the upper striking element 5 is fixed. The abutment element 8 is configured to interact with a ram element of a known type of punching machine to which the punching device 1 is attached.

[0050] The abutment element 8 is slidably connected to the upper support 3 by one or more, for example four, third guide pins 39, each fitted with a third elastic means 38 comprising a cylindrical helical spring.

[0051] The third elastic means 38 is interposed between the abutment element 8 and the upper support 3 and is configured to elastically maintain the abutment element 8 spaced apart from the upper support 3 in its respective inoperative position G, i.e. when not being pressed by the ram element of the punching machine.

[0052] The upper support 3 also comprises a through seat 9 suitable for receiving and slidably guiding an upper striking element 5, which has, for example, the shape of a cylindrical pin.

[0053] The operation of the forming punching device 1 of the present invention includes, in a first step, selecting an upper forming tool 31 and a lower forming tool 32 for performing the required forming or deformation processing on a workpiece 100, such as a sheet metal, positioned on the upper wall 14a of the die holder body 14 of the die holder unit 12.

[0054] To select, for example, an upper forming tool 31, the upper support 3 is rotated about the processing axis X relative to the punch holder body 4, which remains stationary, so that the upper striking elements 5 are aligned and overlap the selected upper forming tool 31. More precisely, after selection, the striking portion 5a of each of the upper striking elements 5 faces the abutment end 7a of the upper thrust element 7, which is connected to the upper tool holder element 33 that receives and supports the selected upper forming tool 31.

[0055] Alternatively, the punch holder body 4 can rotate about the machining axis X relative to the upper support 3 which remains stationary.

[0056] The upper supports 3 or punch holder bodies 4 are rotated relative to one another about the machining axis X by suitable first drive means of a known type, which will not be described in further detail, of the punching machine to which the punching device 1 of the invention is attached.

[0057] The entire punch holder unit 2 can be rotated about the processing axis X in order to angularly orient (index) the upper forming tool 31 relative to the processing axis X.

[0058] The punch holder unit 2 is rotated about the processing axis X by suitable second drive means of the punching machine, which are of a known type and will not be described in further detail.

[0059] To select a lower forming tool 32 complementary to the selected upper forming tool 31, the lower support 13 is rotated about the processing axis X together with the die holder body 14, while the lower striking elements 15 are held fixed in the inoperative position A by the first tabs 21 engaged in the longitudinal grooves 24. In this way, the desired lower forming tool 32 can be aligned and superimposed on the respective striking parts 15a of the lower striking elements 15. More precisely, after selection, the striking parts 15a of the lower striking elements 15 face the lower thrust elements 17, which support the lower tool holder elements 34 that house and support the selected lower forming tool 32 (FIG. 12).

[0060] The lower support 13 is rotated about the processing axis X by suitable third drive means of the punching machine, which is of a known type and will not be described in further detail.

[0061] In a first step, the lower striking element 15 is moved from a non-operating position A to a first operating position B by the driving means 25, 26 ( FIG. 13 ) in order to angularly orient (index) the lower forming tool 32 relative to the processing axis X in accordance with the selected angular orientation of the upper forming tool 31. More precisely, the first linear actuator 25 is driven to raise the lower striking element 15, so that the first stop means 21 (first tab) disengages from the longitudinal axis 24, which is instead engaged by the second stop means 22 (second tab 22). The lower striking element 15 is therefore coupled to the lower support 13 and becomes integral with it so as to rotate therewith.

[0062] In a second step, the lower support 13 together with the die holder body 14 and the lower striking element 15 is rotated about the processing axis X to orient the selected lower forming tool 32 .

[0063] The upper and lower forming tools 31, 32 can then be moved simultaneously towards each other along the processing axis X to begin forming and / or deforming the workpiece 100.

[0064] For this purpose, the upper striking element 5 is moved (e.g. by an impact movement) by a ram element (not shown) of the punching machine so as to strike and move the thrust element 7 and thus the punch holder element 33 connected to the thrust element 7 and supporting the selected upper forming tool 31, so that the selected upper forming tool 31 partially escapes from the punch holder body 4 and interacts with the workpiece 100.

[0065] Similarly, the lower striking elements 15 are moved (e.g., also by impact movement) from the first operating position B to the second operating position C by the drive means 25, 26 (FIG. 14). More precisely, the second linear actuator 26 is driven to further raise the lower striking elements 15 so that each striking portion 15a abuts against and pushes up the lower thrust element 17 supporting the lower tool holder element 34 supporting the selected lower forming tool 32. Thus, the lower forming tool partially escapes from the die holder body 14 and interacts with the workpiece 100.

[0066] It should be noted that the upper and lower forming tools 31, 32 (punch and forming die) can act on the workpiece 100, which is held stationary, to produce deep drawn portions of various shapes and sizes, such as upwardly projecting bridges, slits, etc., or by moving the workpiece in two directions perpendicular to the processing axis X (i.e., horizontally), to produce elongated deformations, such as upwardly projecting steps, ribs, slits, etc.

[0067] Therefore, the punching device 1 of the present invention makes it possible to optimally perform multiple different shaping and / or deformation processes on the workpiece 100 using multiple upper and lower forming tools 31, 32, without the need to stop the punching machine to which the punching device 1 is attached in order to change the tools.

[0068] In particular, the punching device 1 of the present invention makes it possible to quickly and precisely select and angularly orient two upper and lower forming tools required to perform a particular forming process, in particular selected from a plurality of upper forming tools 31 and a plurality of lower forming tools 32 mounted on the punch holder unit 2 and the die holder unit 12, respectively.

[0069] The punching device 1 also allows a number of different shaping or deformation operations to be carried out on the workpiece 100 while it is stationary or moving along two mutually perpendicular and substantially horizontal directions.

[0070] The punching device 1 comprises a punch holder unit 2 and a die holder unit 12 which have a simple and compact structure and small dimensions.

[0071] The invention further relates to a punching machine comprising at least one punching device 1 according to the invention as described above and shown in Figures 1 to 14.

Claims

1. A punching device (1) that can be attached to a punching machine for forming and / or deforming a workpiece (100), comprising: a punch holder unit (2) including an upper support (3) rotatable about a processing axis (X), a punch holder body (4) rotatably connected to the upper support (3) and arranged to slidably accommodate a plurality of upper forming tools (31), and an upper striking element (5) slidably supported by the upper support (3) and movable parallel to the processing axis (X) to selectively interact with a defined upper forming tool (31) to partially push the defined upper forming tool (31) out of the punch holder body (4) and cause it to interact with the workpiece (100); a die holder unit (12) comprising a lower support (13) rotatable about the processing axis (X); a die holder body (14) fixed to the lower support (13) and arranged to slidably accommodate a plurality of lower forming tools (32); and a lower striking element (15) accommodated in the lower support (13) and movable linearly along the processing axis (X) and rotatably about the processing axis (X) to selectively interact with the defined lower forming tools (32), wherein the lower striking element (15) is stopped by a first stop means (21) a die holder unit (12) linearly movable between a non-operating position (A) in which the lower striking element (15) is locked against rotation by a second stop means (22) so as not to rotate together with the lower support (13), a first operating position (B) in which the lower striking element (15) is connected to the lower support (13) by a second stop means (22) so as to rotate together with the lower support about the processing axis (X), and a second operating position (C) in which the lower striking element (15) partially pushes the defined lower forming tool (32) out of the die holder body (14) so ​​as to interact with the workpiece (100); A punching device (1) comprising:

2. 2. The punching device (1) according to claim 1, wherein the die holder body (14) comprises a plurality of lower seats (16), each of which is suitable for receiving a lower tool holder element (34) having a respective lower forming tool (32) associated therewith, and wherein the lower tool holder element (34) comprises a first end (34a) configured to receive and support the respective lower forming tool (32) and a second end (34b) suitable for interacting with the lower striking element (15).

3. 3. The punching device (1) according to claim 1 or 2, wherein the lower striking element (15) is slidably connected to the die holder body (14) by means of a first guide pin (20) having a first upper end (20a) fixed to the die holder body (14) and a second lower end (20b) slidably connected to a seat (27) of the lower striking element (15), in particular the first guide pin (20) being substantially coaxial with the processing axis (X).

4. 4. A punching device (1) according to any one of claims 1 to 3, comprising a first elastic means (28) interposed between the lower striking element (15) and the die holder body (14) and configured to elastically maintain the lower striking element (15) spaced apart from the die holder body (14) in the non-operating position (A).

5. 5. The punching device (1) according to claim 1, wherein the die holder unit (12) comprises a plurality of lower thrust elements (17) slidably connected to the die holder body (14) and arranged to support respective lower tool holder elements (34) of the lower forming tool (32), and each lower thrust element (17) is abutted by the lower striking element (15) and can be moved along the processing axis (X) to move the respective lower tool holder element (34) and the associated lower forming tool (32).

6. The die holder unit (12) second elastic means (18) interposed between each lower thrust element (17) and the die holder body (14) and configured to maintain the lower thrust element (17) elastically spaced apart from the die holder body (14) in its respective inoperative position (E) when the lower thrust element (17) is not abutted or pushed by the lower striking element (15); 6. A punching device (1) according to claim 5, comprising:

7. 7. The punching device (1) according to claim 1, wherein the first stop means (21) comprises a first tab configured to engage in a longitudinal groove (24) made in the outer wall of the lower striking element (15), in particular parallel to the machining axis (X), and the second stop means (22) comprises a second tab fixed to the lower support (13) and configured to engage in the longitudinal groove (24).

8. 8. A punching device (1) according to any one of claims 1 to 7, comprising drive means (25, 26) acting on the lower striking element (15) to move it linearly along the thrust direction (F) to the operating position (B, C).

9. 9. The punching device (1) according to claim 8, wherein the drive means (25, 26) comprises a first linear actuator (25) adapted to move the lower striking element (15) between the non-operating position (A) and the first operating position (B), and a second linear actuator (26) adapted to move the lower striking element (15) between the first operating position (B) and the second operating position (C).

10. 2. The punching device (1) of claim 1, wherein the die holder body (14) comprises an upper wall (14a) adapted to abut against and support the workpiece (100), the upper wall (14a) having a plurality of lower seats (16), each adapted to receive a lower tool holder element (34) having a respective lower forming tool (32) associated therewith.

11. 11. A punching device (1) according to any one of claims 1 to 10, wherein the punch holder body (4) comprises a plurality of upper seats (6), each adapted to receive a respective upper thrust element (7) and an upper tool holder element (33) associated with a corresponding upper forming tool (31), and the upper thrust element (7) is interposed between the upper striking element (5) and the upper tool holder element (33).

12. 12. The punching device (1) according to claim 11, wherein each upper thrust element (7) comprises an abutment end (7a) configured to interact with a respective striking portion (5a) of the upper striking element (5) and a connection end (7b) coupled to the upper tool holder element (33).

13. 13. A punching device (1) according to any one of claims 1 to 12, wherein the punch holder unit (2) comprises an abutment element (8) slidably connected to the upper support (3) and to which the upper striking element (5) is fixed, in particular the abutment element (8) being configured to interact with a ram element of the punching machine.

14. 14. The punching device (1) according to any one of claims 1 to 13, wherein the upper support (3) comprises a through seat (9) suitable for receiving and slidably guiding the upper striking element (5).

15. A punching machine comprising a punching device (1) according to any one of claims 1 to 14.

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