EP0920933B1 - Improved punching machine for metal sheet panels - Google Patents
Improved punching machine for metal sheet panels Download PDFInfo
- Publication number
- EP0920933B1 EP0920933B1 EP98203435A EP98203435A EP0920933B1 EP 0920933 B1 EP0920933 B1 EP 0920933B1 EP 98203435 A EP98203435 A EP 98203435A EP 98203435 A EP98203435 A EP 98203435A EP 0920933 B1 EP0920933 B1 EP 0920933B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- punching
- panel
- work table
- bearing structure
- punching machine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/24—Perforating, i.e. punching holes
- B21D28/26—Perforating, i.e. punching holes in sheets or flat parts
- B21D28/265—Perforating, i.e. punching holes in sheets or flat parts with relative movement of sheet and tools enabling the punching of holes in predetermined locations of the sheet, e.g. holes punching with template
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/24—Perforating, i.e. punching holes
- B21D28/246—Selection of punches
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/02—Advancing work in relation to the stroke of the die or tool
- B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
- B21D43/10—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by grippers
Definitions
- the present invention refers to an improved punching machine for metal sheet panels. (see for example US-A-4 503 741).
- punching machines for metal sheet panels generally comprise a work table for a panel to be punched, a "C" shape or an "arched” annular bearing structure, having a groove where the work table passes through and to which a punching head is mounted, and moving means (manipulator) for the panel to be punched on the work table to hold the panel at one of its sides and to bring it in correspondence of the punching head.
- the manipulator Since in general the panel must be punched in points even very distant from each other, for example along all the sides of the same, the manipulator must also have an extended stroke in order to be able to bring all those points of the panel that have to be punched in correspondence ofthe punching head. According to the dimension of the panel such stroke can be so extended to make it necessary to carry out the movement of the panel in successive stages, getting hold of the panel, moving it by a certain length, releasing it, bringing the manipulator back to its original position, getting again hold of the panel and then going on with the movement of the same. Obviously, this slows machining time considerably.
- object of the present invention has been to provide a punching machine that would solve the problem pointed out above.
- FIGs 1 to 7 there is shown a punching machine according to a first embodiment of the present invention.
- Such punching machine comprises a work table 1 for the panels to be machined, and a bearing structure 2 that can have a substantially close arched annular shape, as in Figures 1 to 6, or that can be made of two substantially facing "C" shape or "arched" structures 2', 2", as in Figure 7.
- the bearing structure 2 has a central groove 3 through which the work table 1 passes.
- Each punching head comprises two overlapping parallelepiped blocks 5 and 6, the first known as punch holder block, fixed to the upper part of the bearing structure 2 and provided with one or more punching tools, the second, known as matrix holder block, fixed instead to the lower part of the bearing structure 2 and below the work table 1 and provided with respective matrix dies for the punching tools.
- the two punching heads are of the "multi-press" type, that is, each one provided in the punch holder block 5 with a plurality of punching tools 7 (small tools), 8 (large tools) having variable dimensions and operable independently one from another by means of respective actuator pistons 9, 10 and, in the matrix holder block 6, a respective plurality of matrix dies 11 (for small tools), 12 (for large tools).
- Punching heads of this type already known and described for example in EP-A-0028588, allow to perform a plurality of punching operations without the need to substitute the punching tools.
- the punching heads could be of the "mono-press" type, each one provided with one single actuator piston in the punch holder block, and either provided or not with systems for the quick change of the punch-matrix set. This is not essential to the purpose of the present invention.
- the punching machine comprises two manipulators 13, 14 located in correspondence of the two ends of the work table 1.
- Each manipulator 13,14 comprises a first carriage 15 that is movable along slide guides 16 in a direction indicated by Y in Figure 1 perpendicular to the bearing structure 2, and a second carriage 17 movable instead along a direction indicated by X in the same Figure, parallel to the bearing structure 2.
- Pinchers 18 suitable to hold a metal sheet panel P in correspondence of an edge of the same are associated to the carriage 17.
- a panel to be punched P1 is fed either by an operator or automatically on the work table 1, in the direction indicated by A in Figure 2 (that is indifferently from the right or from the left) in correspondence with the manipulator 13, while the manipulator 14 is engaged in the handling of a previous panel P0 for the machining of the same on behalf of the punching heads 4', 4".
- the manipulator 13 holds one back edge of the panel P1 with its pincers 18.
- the manipulator 14 moves forward along the guides 16 and it gets hold of the fore edge of panel P1 by its pincers 18; therefore the two manipulators exchange panel P1 between themselves.
- the manipulator 13 releases panel P1 and moves back along the guides 16, getting back to the position shown in Figure 2. While the manipulator 14 moves the panel P1 in the various positions necessary to carry out machining of the edge or, more in general, of the back half of the same, the manipulator 13 is ready to receive a new panel, and the cycle is thus repeated.
- the two punching heads 4', 4" can be fixed to the arch 2. It is also possible to provide for a plurality of fixing positions for the punching heads 4', 4" in the arch 2, so that during the assembly of the machine it is possible to vary the mutual distance between heads.
- the two heads can be mounted in a sliding way along the direction X, by means sliders 50 and guides 51 and, for example, adjusting screws 52, in order to be able to adjust the mutual distance as a function of the dimensions of the panel to be punched.
- FIG. 7 A variation of the previously described punching machine is shown in Figure 7.
- the bearing structure 2 is not a closed arch but it is formed of two arches 2', 2"
- the two arches 2', 2" can be preferably made become mobile with regards to a base 100 of the punching machine, in order to be able to adjust the mutual distance between the two punching heads 4', 4".
- FIGs from 8 to 10 there is shown a punching machine according to a second embodiment of the present invention.
- the punching machine comprises a single manipulator 13, and it is provided with a rotator 60 for the panel to be machined.
- the sole manipulator 13, without the rotator 60 would in fact not allow to carry out machining in correspondence of the edge of the panel that is engaged with the pinchers 18.
- the rotator 60 instead allows to rotate the panel once all the punching operations on the free edge of the panel have been completed, and therefore to be able to carry out the punching also on the other edge of the panel.
- Figure 9 the operation of rotation of the panel P on behalf of the rotator 60 is shown.
Abstract
Description
- The present invention refers to an improved punching machine for metal sheet panels. (see for example US-A-4 503 741).
- As known, punching machines for metal sheet panels generally comprise a work table for a panel to be punched, a "C" shape or an "arched" annular bearing structure, having a groove where the work table passes through and to which a punching head is mounted, and moving means (manipulator) for the panel to be punched on the work table to hold the panel at one of its sides and to bring it in correspondence of the punching head.
- Since in general the panel must be punched in points even very distant from each other, for example along all the sides of the same, the manipulator must also have an extended stroke in order to be able to bring all those points of the panel that have to be punched in correspondence ofthe punching head. According to the dimension of the panel such stroke can be so extended to make it necessary to carry out the movement of the panel in successive stages, getting hold of the panel, moving it by a certain length, releasing it, bringing the manipulator back to its original position, getting again hold of the panel and then going on with the movement of the same. Obviously, this slows machining time considerably.
- In view of the state of the art described, object of the present invention has been to provide a punching machine that would solve the problem pointed out above.
- According to the present invention, such object is attained thanks to a punching machine for metal sheet panels as defined in
claim 1. - The characteristics and the advantages of the present invention will be rendered more evident by the following detailed description of some embodiments thereof, illustrated as non-limiting examples in the enclosed drawings, in which:
- Figure 1 shows in axonometry a punching machine according to a first embodiment of the present invention;
- Figure 2, 3 and 4 are plan views of the punching machine of Figure 1, showing three different operating conditions;
- Figure 5 is sectional view along line V-V of Figure 3;
- Figure 6 shows, in a sectional view analogous to the one of Fig. 5, a first variation of the punching machine according to the first embodiment;
- Figure 7 shows, in a sectional view analogous to the one of Fig. 5, a second variation of the punching machine according to the first embodiment;
- Figure 8 shows a punching machine in accordance with a second embodiment of the present invention, in axonometry;
- Figure 9 is a plan view of the punching machine of Figure 8, in a particular operating condition; and
- Figure 10 is section along line X-X of Figure 9.
-
- With reference to the drawings, in Figures 1 to 7 there is shown a punching machine according to a first embodiment of the present invention. Such punching machine comprises a work table 1 for the panels to be machined, and a
bearing structure 2 that can have a substantially close arched annular shape, as in Figures 1 to 6, or that can be made of two substantially facing "C" shape or "arched"structures 2', 2", as in Figure 7. In both cases, thebearing structure 2 has acentral groove 3 through which the work table 1 passes. - Two substantially facing punching heads 4', 4" are mounted to the
bearing structure 2, inside thegroove 3. Each punching head comprises two overlappingparallelepiped blocks 5 and 6, the first known as punch holder block, fixed to the upper part of thebearing structure 2 and provided with one or more punching tools, the second, known as matrix holder block, fixed instead to the lower part of thebearing structure 2 and below the work table 1 and provided with respective matrix dies for the punching tools. In the example shown in the drawings, the two punching heads are of the "multi-press" type, that is, each one provided in the punch holder block 5 with a plurality of punching tools 7 (small tools), 8 (large tools) having variable dimensions and operable independently one from another by means ofrespective actuator pistons matrix holder block 6, a respective plurality of matrix dies 11 (for small tools), 12 (for large tools). Punching heads of this type, already known and described for example in EP-A-0028588, allow to perform a plurality of punching operations without the need to substitute the punching tools. As an alternative, the punching heads could be of the "mono-press" type, each one provided with one single actuator piston in the punch holder block, and either provided or not with systems for the quick change of the punch-matrix set. This is not essential to the purpose of the present invention. - Still with reference to Figures 1 to 7, the punching machine comprises two
manipulators manipulator first carriage 15 that is movable alongslide guides 16 in a direction indicated by Y in Figure 1 perpendicular to thebearing structure 2, and asecond carriage 17 movable instead along a direction indicated by X in the same Figure, parallel to thebearing structure 2.Pinchers 18 suitable to hold a metal sheet panel P in correspondence of an edge of the same are associated to thecarriage 17. - With reference to Figures 2 and 4, a panel to be punched P1 is fed either by an operator or automatically on the work table 1, in the direction indicated by A in Figure 2 (that is indifferently from the right or from the left) in correspondence with the
manipulator 13, while themanipulator 14 is engaged in the handling of a previous panel P0 for the machining of the same on behalf of the punching heads 4', 4". After having carried out the centring of panel P1 with the aid of the centring means 19 (for example, pawls projecting and retracting with regards to the work table 1), themanipulator 13 holds one back edge of the panel P1 with itspincers 18. Moving to Figure 3, once the machining of the panel P0 is completed, thecarriage 15 of themanipulator 14 moves back along theguides 16, thus clearing the machining zone within the groove of thebearing structure 2, and it proceeds with the release of the panel P0 by means of the movement ofcarriage 17, indifferently in either one of the two directions S indicated in Figure 3. Simultaneously, thecarriage 15 of themanipulator 13 moves forward along theguides 16 in the direction Y, thus bringing the fore edge of the panel P1 in the machining zone within the groove of thebearing structure 2. Thecarriage 17 of themanipulator 13, while moving in the direction X, moves the panel P1 into the various positions in such a way that the punching heads 4', 4" can carry out the machining where requested. Once the machining of the edge or more in general of the fore half of panel P1 has been completed, themanipulator 14 moves forward along theguides 16 and it gets hold of the fore edge of panel P1 by itspincers 18; therefore the two manipulators exchange panel P1 between themselves. Themanipulator 13 releases panel P1 and moves back along theguides 16, getting back to the position shown in Figure 2. While themanipulator 14 moves the panel P1 in the various positions necessary to carry out machining of the edge or, more in general, of the back half of the same, themanipulator 13 is ready to receive a new panel, and the cycle is thus repeated. - Owing to the fact that two punching heads, instead of one single punching head as in the known punching machines, are mounted to the
bearing structure 2, at a distance and substantially facing each other, the course in the direction X that thecarriages 17 of the manipulators must run is considerably reduced. In particular, it is possible to avoid movements of the panel in successive stages, which largely slow the machining, by which the pincers of a manipulator get hold of the panel, therefore thecarriage 17 moves along the direction X, the panel is released, thecarriage 17 gets back to its initial position, gets again hold of the panel and therefore repeats the movement. For example, with a 1500 mm stroke along the direction X the punching machine is capable to carry out the machining of sheets having dimensions of 2500-2600 mm along X, without any need to carry out movements in successive stages. - The two punching heads 4', 4" can be fixed to the
arch 2. It is also possible to provide for a plurality of fixing positions for the punching heads 4', 4" in thearch 2, so that during the assembly of the machine it is possible to vary the mutual distance between heads. As an alternative, as it is schematically shown in Figure 6, the two heads (or possibly only one of them) can be mounted in a sliding way along the direction X, bymeans sliders 50 andguides 51 and, for example, adjustingscrews 52, in order to be able to adjust the mutual distance as a function of the dimensions of the panel to be punched. - A variation of the previously described punching machine is shown in Figure 7. Here, besides the fact that the
bearing structure 2 is not a closed arch but it is formed of twoarches 2', 2", it is also possible to observe that the twoarches 2', 2" can be preferably made become mobile with regards to abase 100 of the punching machine, in order to be able to adjust the mutual distance between the two punching heads 4', 4". - In Figures from 8 to 10 there is shown a punching machine according to a second embodiment of the present invention. Unlike the previous embodiment, the punching machine comprises a
single manipulator 13, and it is provided with arotator 60 for the panel to be machined. Thesole manipulator 13, without therotator 60, would in fact not allow to carry out machining in correspondence of the edge of the panel that is engaged with thepinchers 18. Therotator 60 instead allows to rotate the panel once all the punching operations on the free edge of the panel have been completed, and therefore to be able to carry out the punching also on the other edge of the panel. In Figure 9 the operation of rotation of the panel P on behalf of therotator 60 is shown.
Claims (8)
- Punching machine for metal sheet panels comprising a work table (1), a bearing structure (2; 2', 2") for punching units (4', 4"), said bearing structure (2; 2', 2") having a groove (3) where said work table (1) passes through, two punching units (4', 4") mounted on said bearing structure (2; 2', 2") and substantially facing one another, moving means (13, 14; 13, 60) for a panel on said work table (1) to bring the panel in correspondence of said punching units (4', 4"), characterized in that said moving means (13, 14; 13, 60) comprise two manipulators (13, 14) each one having a first carriage (15) movable along a first direction (Y) on said work table (1), said first direction (Y) being substantially orthogonal to said bearing structure (2; 2', 2"), and a second carriage (17) provided with hold means (18) for the panel mobile along a second direction (X) on the work table (1), said second direction (X) being substantially parallel to said bearing structure (2; 2', 2"), each manipulators (13, 14) being associated with respective end of the work table (1) and located at opposite side of the work table (1) with regards to said bearing structure (2; 2', 2"), said two manipulators (13, 14) having a stroke along said first direction (Y) that is sufficient to allow a manipulator to feed a panel to be punched or discharge a panel already punched while the other manipulator is engaged in the machining of another panel.
- Punching machine according to claim 1, characterised in that said moving means comprise also a rotator (60) for the rotation of the panel on the work table (1).
- Punching machine according to claim 1, characterised in that said two punching units (4', 4") are substantially facing along said second direction (X).
- Punching machine according to claim 3, characterised in that said two punching units (4', 4") are multi-press punching heads each comprising a plurality ofpunching tools (7, 8) operable independently one from the others.
- Punching machine according to claim 3, characterised in that said two punching units (4', 4") are mono-press punching heads.
- Punching machine according to any one of the claims 3, 4 or 5, characterised in that said two punching units (4', 4") have adjustable mutual distance.
- Punching machine according to any one of the previous claims, characterised in that said bearing structure (2) is a substantially close annular structure.
- Punching machine according to any one of the claims from 1 to 6, characterised in that said bearing structure (2', 2") comprises two substantially facing "C" shape half structures, each one suitable to support a respective one of said two punching units (4', 4").
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI972695 | 1997-12-05 | ||
IT97MI002695A IT1296923B1 (en) | 1997-12-05 | 1997-12-05 | PERFECTED SHEET METAL PANEL PUNCHING MACHINE |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0920933A2 EP0920933A2 (en) | 1999-06-09 |
EP0920933A3 EP0920933A3 (en) | 2001-01-03 |
EP0920933B1 true EP0920933B1 (en) | 2003-12-17 |
Family
ID=11378316
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98203435A Expired - Lifetime EP0920933B1 (en) | 1997-12-05 | 1998-10-12 | Improved punching machine for metal sheet panels |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0920933B1 (en) |
JP (1) | JPH11244958A (en) |
KR (1) | KR19990062770A (en) |
AT (1) | ATE256511T1 (en) |
BR (1) | BR9805137A (en) |
CA (1) | CA2250781A1 (en) |
DE (1) | DE69820575T2 (en) |
ES (1) | ES2212213T3 (en) |
IT (1) | IT1296923B1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITVE20010018U1 (en) * | 2001-08-13 | 2003-02-13 | Dallan Srl | PUNCHING MACHINE FOR SHEET METAL TAPES |
DE10151286A1 (en) | 2001-10-22 | 2003-04-30 | Tesa Ag | coating process |
ITMI20030242A1 (en) * | 2003-02-11 | 2004-08-12 | Salvagnini Italia Spa | MANIPULATOR FOR HANDLING SHEET SHEETS ON A WORK TABLE IN A PUNCHING MACHINE |
FR2872440B1 (en) * | 2004-07-01 | 2007-10-12 | Jean Claude Jeandeaud | FLAN WORK DEVICE |
EP1759782A1 (en) * | 2005-09-02 | 2007-03-07 | Arcelor Steel Service Centres | Machine and method for machining metal sheets |
CN114378171B (en) * | 2022-03-03 | 2023-09-01 | 杭州尚金缘珠宝首饰有限公司 | A stamping forming machine for gold product processing |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4092892A (en) * | 1975-06-23 | 1978-06-06 | Ronald Moone | Hole forming machine |
EP0100420A1 (en) * | 1982-07-14 | 1984-02-15 | Hämmerle AG | Apparatus for handling workpieces |
US4503741A (en) * | 1982-07-26 | 1985-03-12 | The Warner & Swasey Company | Bridge type punch press |
JPS59223128A (en) * | 1983-06-03 | 1984-12-14 | Nissan Motor Co Ltd | Work gripper of punching press device |
JPS6061129A (en) * | 1983-09-10 | 1985-04-08 | Nissan Motor Co Ltd | Gripping method of work with punching press device |
-
1997
- 1997-12-05 IT IT97MI002695A patent/IT1296923B1/en active IP Right Grant
-
1998
- 1998-10-12 ES ES98203435T patent/ES2212213T3/en not_active Expired - Lifetime
- 1998-10-12 AT AT98203435T patent/ATE256511T1/en active
- 1998-10-12 DE DE69820575T patent/DE69820575T2/en not_active Expired - Lifetime
- 1998-10-12 EP EP98203435A patent/EP0920933B1/en not_active Expired - Lifetime
- 1998-10-21 CA CA002250781A patent/CA2250781A1/en not_active Abandoned
- 1998-12-03 BR BR9805137-7A patent/BR9805137A/en not_active Application Discontinuation
- 1998-12-03 KR KR1019980052844A patent/KR19990062770A/en not_active Application Discontinuation
- 1998-12-04 JP JP10345385A patent/JPH11244958A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
ITMI972695A1 (en) | 1999-06-05 |
ATE256511T1 (en) | 2004-01-15 |
EP0920933A3 (en) | 2001-01-03 |
DE69820575T2 (en) | 2004-11-04 |
JPH11244958A (en) | 1999-09-14 |
BR9805137A (en) | 1999-12-21 |
KR19990062770A (en) | 1999-07-26 |
ES2212213T3 (en) | 2004-07-16 |
EP0920933A2 (en) | 1999-06-09 |
IT1296923B1 (en) | 1999-08-03 |
CA2250781A1 (en) | 1999-06-05 |
DE69820575D1 (en) | 2004-01-29 |
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