EP1050350A1 - Universal puncher holder adaptor for punching machines - Google Patents
Universal puncher holder adaptor for punching machines Download PDFInfo
- Publication number
- EP1050350A1 EP1050350A1 EP00109068A EP00109068A EP1050350A1 EP 1050350 A1 EP1050350 A1 EP 1050350A1 EP 00109068 A EP00109068 A EP 00109068A EP 00109068 A EP00109068 A EP 00109068A EP 1050350 A1 EP1050350 A1 EP 1050350A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- seat
- adaptor according
- punches
- punch holder
- hammer
- 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.)
- Withdrawn
Links
- 238000004080 punching Methods 0.000 title claims abstract description 26
- 239000007787 solid Substances 0.000 claims abstract description 23
- 239000002184 metal Substances 0.000 claims abstract description 16
- 230000014759 maintenance of location Effects 0.000 claims abstract description 7
- 238000003780 insertion Methods 0.000 claims abstract description 3
- 230000037431 insertion Effects 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims description 2
- 230000005484 gravity Effects 0.000 claims description 2
- 230000000284 resting effect Effects 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000005555 metalworking Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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
- B21D28/34—Perforating tools; Die holders
-
- 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
- B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
-
- 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
- B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
- B21D45/003—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass in punching machines or punching tools
- B21D45/006—Stripping-off devices
Definitions
- the present invention relates to a universal punch holder adaptor for punching machines.
- Another drawback of conventional punching machines consists in that during the punching step the punch holder, regardless of its type, is unable to reach the level at which the sheet metal to be worked lies. This is because the elements that physically retain the punch, especially of the Trumpf type, in the punch holder, have a considerable bulk thus preventing achievement of such a configuration by interposing themselves in the clearance between the lower face of the punch holder and the sheet metal.
- the aim of the present invention is to solve the above problems of the prior art by providing a universal adaptor for punching machines which allows to rapidly replace, on a single machine, the punches to be used, without having to resort to the purchase of a plurality of punching machines, and which also allows to perform multiple punching operations without warping the sheet metal being worked.
- a universal adaptor for punching machines characterized in that it comprises a cylindrical seat, which is mounted so as to be rigidly coupled to the lower face of the hammer and inside which a solid punch holder body is rigidly inserted, at least one blind and centered seat for the insertion of the punches being formed in said body, externally actuatable means for the quick retention/release of the punches in said seat and means for extracting the punch from the sheet metal being also provided.
- 1 designates a universal punch holder adaptor for punching machines.
- the adaptor 1 substantially comprises a cylindrical seat 3 which is fitted below the lower face of a hammer 4 and inside which a solid punch holder body 5 is accommodated; said body is rigidly coupled to the hammer 4, and at least one centered and blind seat 6 is formed therein; punches 2 are inserted in each instance in seat 6.
- the adaptor 1 includes means 7 for quickly retaining or, viceversa, releasing the punches 2 in the seat 6; the means 7 are actuatable from the outside by an operator.
- Resilient means 8 which react by compression and act on the punches 2 are inserted in the blind bottom of the seat 6, while a pad 9 for resting on the sheet metal is rigidly coupled to the lower face 5a of the solid body 5; the pad 9 is made of flexible material and is arranged coaxially to the blind seat 6; the pad 9, which is a first possible embodiment of extractor means 10, is crossed axially by a perpendicular opening 9a in order to allow the passage of each punch during the active step of the punching machine.
- Means 11 for the micrometric adjustment of the body 5 in the seat 3 are provided in the adaptor 1, particularly between the cylindrical seat 3 and the solid body 5; such means 11 are described in greater detail hereinafter.
- the extractor means 10 in an alternative embodiment shown in Figure 1, are constituted by a plurality of Belleville spring washers, which are generally designated by the reference numeral 4a, are fitted coaxially to the hammer 4 and rest and react on the upper rim of the cylindrical seat 3.
- the quick release or retention means 7 are constituted by a plate 12 which is fitted so that it can move transversely back and forth in a corresponding seat 13 which has longitudinally larger dimensions, is formed horizontally in the solid body 5 and continues in the cylindrical seat 3.
- the plate 12 can be actuated from the outside thanks to a corresponding actuation means 14 and is provided with a through slot 12a which defines a transverse edge 12b adapted to engage, in the retention configuration which is offset with respect to the punch 2 inserted in the seat 6, with a corresponding perimetric recess 2a usually formed in the punches 2; in the release position, the plate 12 is moved so as to be arranged in coaxial correspondence with the punch 2, allowing to extract it from the seat 6 by gravity.
- the actuation means 14 comprises a button 14a which is transversely movable, in contrast with resilient return means 15, in a corresponding seat 16 formed horizontally on one side of the cylindrical seat 3 and the solid body 5, in alignment with one of the ends of the plate 12.
- Spring means 17 are interposed between the plate 12 and the solid body 5 and are adapted to contrast the sliding thereof and return the slot 12a to its offset configuration with respect to the blind seat 6.
- the means 11 for the micrometric adjustment of the position of the solid body 5 inside the cylindrical seat 3 are constituted by a cylinder 18 which is mounted so that it can rotate transversely in a corresponding through seat 19 which is in turn formed in said seat 3; the cylinder engages a corresponding seat 19a formed in the solid body 5 as an extension of the through seat 19.
- the cylinder 18 has, perimetrically with respect to the proximal end that is directed outwards, a toothed ring 18a for coupling to means 21 for the rotary actuation thereof.
- Such means are constituted by a key 22 which can be actuated manually or automatically and is provided with a tip 22a which has perimetric teeth in order to engage the toothed ring 18a of the cylinder 18.
- the operation of the punch holder according to the present invention is as follows: the punches 2, of the Trumpf type, of the high-turret type, or of another conventional type, are inserted in each instance in the hollow seat 6 formed in the solid body 5 that is part of the adaptor 1.
- the plate 12 is moved by the operator by acting on the button 14a, so as to vertically align the slot 12a with the seat 6 and allow the selected punch 2 to pass in order to be seated; the punch is engaged by overcoming the action of the spring placed on the blind bottom of the seat 6, which constitutes the resilient means 8.
- the plate 12 is released and the spring means 17 return it to a position in which it is axially offset with respect to the seat 6; in this position, the edge 12b fits under the recess 2a formed in the punch 2, retaining it in the seat 6.
- the operator must then exactly align the axis of the punch 2 with the axis of the hammer 4; this is performed by acting on the key 22, turning the eccentric cylinder 18, which in turn moves the solid body 5 by a few tenths of a millimeter, by reaction and against the walls of the seat 19a, until the two axes coincide perfectly.
- the punching machine is therefore ready to perform punching: the hammer 4 drops and, in the version of the adaptor 1 shown in Figure 1, moves not only the solid body 5 but also the cylindrical seat 3 until it is in contact with the sheet metal to be punched.
- the punch 2 continues its stroke for a certain extent by being pushed by the hammer 4, which compresses the Belleville spring washers 4a in order to cover the additional extent and performs the punching action.
- the hammer gradually rises for the stroke for extracting the punch 2 from the hole while, until the stroke has been completed, the cylindrical seat 3 maintains the pressure on the sheet metal, preventing it from warping.
- the hammer then rises completely, pulling the cylindrical seat 3 and resuming the initial position for a subsequent punching operation.
- the punching operation occurs substantially as described above, with the only exception that the cylindrical seat 3 remains fixed during the stroke of the hammer 4 and of the solid body 5, as well as of the punch 2 fitted therein: the resilient pad 9 rests against the sheet metal.
- the punch 2 then passes through the opening 9a formed in the pad during its active stroke and retracts during its return step, while the pad 9 maintains contact with the sheet metal throughout the extraction stroke of the punch 2, preventing any warping of the sheet metal.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
Description
- The present invention relates to a universal punch holder adaptor for punching machines.
- In the sheet metalworking punching machines are used, which are provided with punches of different kinds according to the type of work to be performed.
- Among the various punches, the type known as Trumpf or those known as "high-turret" punches are generally used most frequently.
- However, up to now punching machines have been manufactured by presetting them specifically for a single use of each one of said punches, so that if one wishes to have both types of punches available, it is necessary to purchase two punching machines, with an evident increase in costs and capital lockup and amortization.
- Another drawback of conventional punching machines consists in that during the punching step the punch holder, regardless of its type, is unable to reach the level at which the sheet metal to be worked lies. This is because the elements that physically retain the punch, especially of the Trumpf type, in the punch holder, have a considerable bulk thus preventing achievement of such a configuration by interposing themselves in the clearance between the lower face of the punch holder and the sheet metal.
- Particularly in the case of multiple punching operations to be performed in succession, a warping of the sheet metal occurs, which reduces the precision of the work carried out.
- The aim of the present invention is to solve the above problems of the prior art by providing a universal adaptor for punching machines which allows to rapidly replace, on a single machine, the punches to be used, without having to resort to the purchase of a plurality of punching machines, and which also allows to perform multiple punching operations without warping the sheet metal being worked.
- These and other objects which will become better apparent hereinafter are achieved by a universal adaptor for punching machines, characterized in that it comprises a cylindrical seat, which is mounted so as to be rigidly coupled to the lower face of the hammer and inside which a solid punch holder body is rigidly inserted, at least one blind and centered seat for the insertion of the punches being formed in said body, externally actuatable means for the quick retention/release of the punches in said seat and means for extracting the punch from the sheet metal being also provided.
- Further characteristics and advantages will become better apparent from the following description of a preferred embodiment of a universal adaptor for punching machines, illustrated only by way of non-limitative example in the accompanying drawings, wherein:
- Figure 1 is a schematic and partially sectional side view of a punching head of a corresponding machine provided with the adaptor according to the invention;
- Figure 2 is a corresponding sectional plan view thereof, taken along the plane II-II of Figure 1;
- Figures 3 and 4 are schematic side views of the punching head of Figure 1 during punching, and at rest;
- Figures 5 and 6 are schematic views of an embodiment of means for the micrometric adjustment of the position of the solid body inside the cylindrical seat.
-
- With reference to the above Figures, 1 designates a universal punch holder adaptor for punching machines.
- The adaptor 1 substantially comprises a
cylindrical seat 3 which is fitted below the lower face of ahammer 4 and inside which a solidpunch holder body 5 is accommodated; said body is rigidly coupled to thehammer 4, and at least one centered andblind seat 6 is formed therein;punches 2 are inserted in each instance inseat 6. - The adaptor 1 includes
means 7 for quickly retaining or, viceversa, releasing thepunches 2 in theseat 6; themeans 7 are actuatable from the outside by an operator. - Resilient means 8 which react by compression and act on the
punches 2 are inserted in the blind bottom of theseat 6, while apad 9 for resting on the sheet metal is rigidly coupled to thelower face 5a of thesolid body 5; thepad 9 is made of flexible material and is arranged coaxially to theblind seat 6; thepad 9, which is a first possible embodiment of extractor means 10, is crossed axially by a perpendicular opening 9a in order to allow the passage of each punch during the active step of the punching machine. -
Means 11 for the micrometric adjustment of thebody 5 in theseat 3 are provided in the adaptor 1, particularly between thecylindrical seat 3 and thesolid body 5;such means 11 are described in greater detail hereinafter. - The extractor means 10, in an alternative embodiment shown in Figure 1, are constituted by a plurality of Belleville spring washers, which are generally designated by the reference numeral 4a, are fitted coaxially to the
hammer 4 and rest and react on the upper rim of thecylindrical seat 3. - The quick release or retention means 7 are constituted by a
plate 12 which is fitted so that it can move transversely back and forth in acorresponding seat 13 which has longitudinally larger dimensions, is formed horizontally in thesolid body 5 and continues in thecylindrical seat 3. - The
plate 12 can be actuated from the outside thanks to a corresponding actuation means 14 and is provided with athrough slot 12a which defines a transverse edge 12b adapted to engage, in the retention configuration which is offset with respect to thepunch 2 inserted in theseat 6, with a corresponding perimetric recess 2a usually formed in thepunches 2; in the release position, theplate 12 is moved so as to be arranged in coaxial correspondence with thepunch 2, allowing to extract it from theseat 6 by gravity. - The actuation means 14 comprises a
button 14a which is transversely movable, in contrast with resilient return means 15, in acorresponding seat 16 formed horizontally on one side of thecylindrical seat 3 and thesolid body 5, in alignment with one of the ends of theplate 12. -
Spring means 17 are interposed between theplate 12 and thesolid body 5 and are adapted to contrast the sliding thereof and return theslot 12a to its offset configuration with respect to theblind seat 6. - The
means 11 for the micrometric adjustment of the position of thesolid body 5 inside thecylindrical seat 3 are constituted by acylinder 18 which is mounted so that it can rotate transversely in a corresponding throughseat 19 which is in turn formed in saidseat 3; the cylinder engages acorresponding seat 19a formed in thesolid body 5 as an extension of the throughseat 19. - The
cylinder 18 has, perimetrically with respect to the proximal end that is directed outwards, atoothed ring 18a for coupling to means 21 for the rotary actuation thereof. - Such means are constituted by a
key 22 which can be actuated manually or automatically and is provided with a tip 22a which has perimetric teeth in order to engage thetoothed ring 18a of thecylinder 18. - The operation of the punch holder according to the present invention is as follows: the
punches 2, of the Trumpf type, of the high-turret type, or of another conventional type, are inserted in each instance in thehollow seat 6 formed in thesolid body 5 that is part of the adaptor 1. - The
plate 12 is moved by the operator by acting on thebutton 14a, so as to vertically align theslot 12a with theseat 6 and allow the selectedpunch 2 to pass in order to be seated; the punch is engaged by overcoming the action of the spring placed on the blind bottom of theseat 6, which constitutes theresilient means 8. - Once seating has been completed, the
plate 12 is released and the spring means 17 return it to a position in which it is axially offset with respect to theseat 6; in this position, the edge 12b fits under the recess 2a formed in thepunch 2, retaining it in theseat 6. - The operator must then exactly align the axis of the
punch 2 with the axis of thehammer 4; this is performed by acting on thekey 22, turning theeccentric cylinder 18, which in turn moves thesolid body 5 by a few tenths of a millimeter, by reaction and against the walls of theseat 19a, until the two axes coincide perfectly. - In this configuration, the punching machine is therefore ready to perform punching: the
hammer 4 drops and, in the version of the adaptor 1 shown in Figure 1, moves not only thesolid body 5 but also thecylindrical seat 3 until it is in contact with the sheet metal to be punched. - The
punch 2 continues its stroke for a certain extent by being pushed by thehammer 4, which compresses the Belleville spring washers 4a in order to cover the additional extent and performs the punching action. - During the return stroke, the hammer gradually rises for the stroke for extracting the
punch 2 from the hole while, until the stroke has been completed, thecylindrical seat 3 maintains the pressure on the sheet metal, preventing it from warping. - The hammer then rises completely, pulling the
cylindrical seat 3 and resuming the initial position for a subsequent punching operation. - In the other embodiment of the adaptor 1 shown in Figures 3 and 4, the punching operation occurs substantially as described above, with the only exception that the
cylindrical seat 3 remains fixed during the stroke of thehammer 4 and of thesolid body 5, as well as of thepunch 2 fitted therein: theresilient pad 9 rests against the sheet metal. - The
punch 2 then passes through the opening 9a formed in the pad during its active stroke and retracts during its return step, while thepad 9 maintains contact with the sheet metal throughout the extraction stroke of thepunch 2, preventing any warping of the sheet metal. - In practice it has been observed that the described invention achieves the intended aim and objects.
- The invention thus conceived is susceptible of numerous modifications and variations, all of which are within the scope of the inventive concept.
- Moreover, all the details may be replaced with other technically equivalent ones .
- In practice, the materials used, as well as the shapes and the dimensions, may be any according to requirements without thereby abandoning the scope of the protection of the appended claims.
- The disclosures in UK Patent Application No. 9910304.6 from which this application claims priority are incorporated herein by reference.
- Where technical features mentioned in any claim are followed by reference signs, those reference signs have been included for the sole purpose of increasing the intelligibility of the claims and accordingly, such reference signs do not have any limiting effect on the interpretation of each element identified by way of example by such reference signs.
Claims (12)
- A universal punch holder adaptor for punching machines, characterized in that it comprises a cylindrical seat (3), which is mounted below the lower face of the hammer (4) and inside which a solid punch holder body (5) is accommodated, said body (5) being rigidly coupled to the hammer (4) and being provided with at least one blind and centered seat (6) for the insertion of the punches (2), externally actuatable means (7) for the quick retention/release of the punches (2) in said seat (6) and means (10) for extracting the punch (2) from the sheet metal being also provided.
- The adaptor according to claim 1, characterized in that resilient means (8) which react to compression are interposed between the punches (2) and the blind bottom of said seat (6).
- The adaptor according to claim 1, characterized in that said extractor means (10) comprise a pad (9) made of flexible material for resting on the sheet metal, said pad (9) being rigidly coupled to the lower face (5a) of said solid punch holder body (5) and being coaxial to said blind seat (6), said pad (9) being crossed axially by a perpendicular opening (9a) for the passage of the punches (2) during the active step of the hammer (4).
- The adaptor according to claim 1, characterized in that said extractor means (10) comprise a plurality of Belleville spring washers (4a) which are fitted on said hammer (4) and actively rest for contrast on the upper rim of said cylindrical seat (3).
- The adaptor according to claim 1, characterized in that means (11) for the micrometric adjustment of said body (5) in said seat (3) are provided between said cylindrical seat (3) and said solid punch holder body (5).
- The adaptor according to claim 1, characterized in that said quick retention/release means (7) comprise a plate (12) which is transversely movable back and forth within a corresponding longitudinally larger horizontal seat (13) which is formed in said solid punch holder body (5) and continues in said cylindrical seat (3), said plate (12) being actuatable from the outside with a corresponding actuation means (14) and being provided with a through slot (12a) which forms an edge (12b) which is adapted to engage, in the retention configuration position which is offset with respect to the punches (2), a corresponding perimetric recess (2a) formed in said punches (2), or to align coaxially therewith, allowing their extraction by gravity.
- The adaptor according to claim 6, characterized in that said actuation means (14) comprises a button (14a) which is transversely movable, in contrast with resilient return means (15), in a corresponding seat (16) formed horizontally on one side of said cylindrical seat (3) and said solid punch holder body (5) in alignment with one end of said plate (12).
- The adaptor according to claim 7, characterized in that spring means (17) for contrasting the sliding of said plate (12) and for returning the slot (12a) into an offset configuration with respect to said blind seat (6) are interposed between said plate (12) and said solid punch holder body (5).
- The adaptor according to claim 1, characterized in that the lower edge of said cylindrical seat (3) reaches by abutment the sheet metal during the active step for punching said sheet metal.
- The adaptor according to claim 5, characterized in that said means (11) for the micrometric adjustment of the solid punch holder body (5) in the cylindrical seat (3) comprise a cylinder (18) which is mounted so as to rotate transversely and eccentrically a corresponding through seat (19) which is formed in said seat (3) and engages a corresponding seat (19a) formed in said solid body (5) as an extension of said through seat (19), said cylinder (18) being perimetrically provided, at the proximal end which is directed outwards, with a toothed ring (18a) for coupling to rotary actuation means (21).
- The adaptor according to claim 10, characterized in that said means (21) for the rotary actuation of said cylinder (18) comprise a manually-operated key (22) which is provided with a tip (22a) which has perimetric teeth for said engagement with said toothed ring (18a).
- The adaptor according to claim 11, characterized in that said key (22) can be actuated automatically.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9910304 | 1999-05-04 | ||
GB9910304A GB2349596A (en) | 1999-05-04 | 1999-05-04 | Universal punch holder adaptor for punching machines |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1050350A1 true EP1050350A1 (en) | 2000-11-08 |
Family
ID=10852784
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00109068A Withdrawn EP1050350A1 (en) | 1999-05-04 | 2000-05-02 | Universal puncher holder adaptor for punching machines |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1050350A1 (en) |
GB (1) | GB2349596A (en) |
TR (1) | TR200001254A3 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7032812B2 (en) * | 2000-05-11 | 2006-04-25 | Euromac S.P.A. | Quick-extraction punch-holder adapter for converting punching machines from a single-punch to a multiple-punch configuration |
DE202004019977U1 (en) * | 2004-12-27 | 2006-05-04 | Trumpf Werkzeugmaschinen Gmbh + Co. Kg | punch holder |
CN110238277A (en) * | 2018-03-09 | 2019-09-17 | 宁波君铭钣金有限公司 | A kind of metal plate punching mold of replaceable formed punch |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3871254A (en) * | 1973-04-13 | 1975-03-18 | Jr Lawrence V Whistler | Means for piercing and stripping thick material |
US4316399A (en) * | 1980-04-04 | 1982-02-23 | Wallis Bernard J | Combined punch retainer and fluid actuated stripper |
US5329835A (en) * | 1992-10-07 | 1994-07-19 | Wilson Tool International, Inc. | Adjustable length punch set assembly |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4174648A (en) * | 1978-02-01 | 1979-11-20 | Wallis Bernard J | Punch retainer |
GB1604825A (en) * | 1978-05-31 | 1981-12-16 | Warner M J | Means for holding punches and similar shanked tools |
US4377100A (en) * | 1981-02-19 | 1983-03-22 | Wallis Bernard J | Punch retainer |
US5317894A (en) * | 1993-03-12 | 1994-06-07 | Rockford Products Corporation | Quick change insert system |
US5752424A (en) * | 1995-06-06 | 1998-05-19 | Wilson Tool International, Inc. | Releasable tool piece punch assembly |
-
1999
- 1999-05-04 GB GB9910304A patent/GB2349596A/en not_active Withdrawn
-
2000
- 2000-05-02 EP EP00109068A patent/EP1050350A1/en not_active Withdrawn
- 2000-05-04 TR TR200001254A patent/TR200001254A3/en unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3871254A (en) * | 1973-04-13 | 1975-03-18 | Jr Lawrence V Whistler | Means for piercing and stripping thick material |
US4316399A (en) * | 1980-04-04 | 1982-02-23 | Wallis Bernard J | Combined punch retainer and fluid actuated stripper |
US5329835A (en) * | 1992-10-07 | 1994-07-19 | Wilson Tool International, Inc. | Adjustable length punch set assembly |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7032812B2 (en) * | 2000-05-11 | 2006-04-25 | Euromac S.P.A. | Quick-extraction punch-holder adapter for converting punching machines from a single-punch to a multiple-punch configuration |
DE202004019977U1 (en) * | 2004-12-27 | 2006-05-04 | Trumpf Werkzeugmaschinen Gmbh + Co. Kg | punch holder |
CN110238277A (en) * | 2018-03-09 | 2019-09-17 | 宁波君铭钣金有限公司 | A kind of metal plate punching mold of replaceable formed punch |
Also Published As
Publication number | Publication date |
---|---|
GB2349596A (en) | 2000-11-08 |
TR200001254A2 (en) | 2000-12-21 |
TR200001254A3 (en) | 2000-12-21 |
GB9910304D0 (en) | 1999-06-30 |
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