EP1089837A1 - Tool holder with punching units - Google Patents
Tool holder with punching unitsInfo
- Publication number
- EP1089837A1 EP1089837A1 EP99932712A EP99932712A EP1089837A1 EP 1089837 A1 EP1089837 A1 EP 1089837A1 EP 99932712 A EP99932712 A EP 99932712A EP 99932712 A EP99932712 A EP 99932712A EP 1089837 A1 EP1089837 A1 EP 1089837A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- tool holder
- supply line
- punching
- springs
- 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.)
- Granted
Links
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
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
- B21D28/12—Punching using rotatable carriers
-
- 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
Definitions
- the invention relates to a tool holder for a punching machine with a plurality of punching die units which are seated in tool holders in the holder and have gas pressure springs for retrieving the punching dies.
- gas pressure springs In addition to the widespread steel springs, which can be designed as helical or disc springs, punching stamp units with gas pressure springs are known, for example, from EP 0 646 427.
- the advantage of gas pressure springs is the possibility of specifically influencing the spring characteristics by changing the pressure level in the pressure chamber of the gas pressure spring.
- the spring force can thus be adapted to the material to be processed, so that e.g. When processing thick steel sheets in the pressure chamber, a very high pressure is generated and when processing thin aluminum sheets, a comparatively low pressure is generated in the pressure chamber. The low pressure when processing soft materials prevents damage to the sensitive, possibly already coated surfaces.
- stamping units with gas pressure springs, but it is very complicated for tool holders that have ten and more tool holders for stamping units to adapt the pressure level in all pressure chambers of the individual stamping units to the material to be processed.
- the object of the invention is to provide a tool holder, the punching provided with gas pressure springs stamp units are quicker and easier to adapt to the material to be processed.
- the object is achieved in that in a tool holder of the type described above, the pressure chambers of the gas pressure springs are connected to a common supply line which can be connected to a compressed gas source.
- the central pressure supply of all pressure chambers enables the internal pressure of all gas pressure springs to be changed simultaneously.
- the changeover times when changing the material to be processed are shortened considerably.
- the common pressure supply also guarantees a uniform pressure level in all gas pressure springs, if this is desired.
- the supply line preferably forms a pressure reservoir.
- the relatively large volume of the supply line leads to flatter characteristic curves of the gas pressure springs, since the displaced volume of a gas pressure spring during a punch stroke is relatively small in relation to the total pressure volume.
- a comparable large volume reservoir can hardly be realized, since the installation space is severely limited by the conditions of the tool holder and the punching machine.
- a control valve for setting a certain pressure level in the supply line is provided between the compressed gas source and the supply line.
- the control valve enables the exact setting of the pressure level if a pressure reservoir with a given, very high pressure is used as the pressure gas source.
- control valves are provided between the supply line and at least some of the pressure chambers for setting a certain pressure level in the respective pressure chambers. Such an arrangement enables the pressure level in the individual pressure chambers to be adjusted individually in order to adapt the individual punching unit individually to the circumstances. Depending on the effective piston area and the type of punch, an even more precise optimization of the restoring forces for the material being processed is possible.
- the tool holder is designed in the manner of a turret and the punching stamp units are arranged in a circle.
- the supply line is preferably arranged in a ring between the punching stamp units. This arrangement is particularly advantageous because there is enough space in the space between the punch units for the supply line, so that retrofitting existing tool holders, which were previously used with punch units with steel springs, is easily possible.
- Nitrogen which is non-flammable, non-toxic and inexpensive, is preferably used as the compressed gas.
- FIG. 1 is a schematic plan view of a tool holder with a supply cable for gas pressure springs in the punching stamp units;
- FIG. 2 shows a cross section of the tool holder according to FIG. 1.
- FIG. 1 shows a tool holder 10 which can be used on a turret punch.
- the disc-shaped tool holder 10 has circularly arranged holders 12 (see FIG. 2), in which punching stamp units 14 are accommodated.
- the structure of the stamping unit 14 is based on the stamping unit described in DE 195 05 754, but the plate spring assemblies provided there are replaced by gas pressure springs 15, as are known in principle from EP 0 708 267.
- the punch unit 14 consist of a guide bush 16, a multi-part punch driver 18 and a punch 20 screwed to the punch driver 18 via a screw 19.
- a stripper plate 22 is provided between the lower end of the guide bush and the punch 20.
- the gas pressure spring 15 is arranged between a radially projecting head 24 and the rear end wall of the guide bush 16.
- the gas pressure spring 15 has a housing 26 which is essentially circular in cross section, in which annular cylindrical bores 28 are arranged, in each of which a piston 30 is axially displaceably guided.
- the cylindrical bores 28 are connected to one another via an annular channel 32 and together form the pressure chamber of the gas pressure spring 15.
- the pistons 30 are by means of Sealing rings 34 sealed against the walls of the cylindrical bores 28.
- the ring channel 32 of the gas pressure spring has a connection channel 36, in the opening 38 of which a supply hose 40 is screwed with a corresponding threaded piece.
- all stamping unit 14 have an identical structure, but it is also conceivable to combine stamping units 14 with a different structure and differently designed gas pressure springs.
- the supply hoses 40 of all punch die units 14 are connected via suitable connections 42 to an annular supply line 44 which is arranged centrally in the center of the tool holder 10.
- the supply line 44 in turn has a pressure connection 46 which is connected to a compressed gas source (not shown).
- a control valve is arranged between the pressure connection 46 and the compressed gas source, with the aid of which the pressure level in the supply line 44 can be adjusted exactly.
- the same pressure level is set in all pressure chambers as in the supply line 44. It is also possible to provide additional control valves between the supply line and the individual pressure chambers, by means of which an individual influencing of the pressure level in individual pressure chambers is possible.
- the supply line will be adapted to the existing installation space in accordance with the shape of the tool holder and the arrangement of the stamping punch units.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Punching Or Piercing (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19827850A DE19827850A1 (en) | 1998-06-23 | 1998-06-23 | Tool holder with stamping punch units |
DE19827850 | 1998-06-23 | ||
PCT/EP1999/004334 WO1999067039A1 (en) | 1998-06-23 | 1999-06-23 | Tool holder with punching units |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1089837A1 true EP1089837A1 (en) | 2001-04-11 |
EP1089837B1 EP1089837B1 (en) | 2002-05-22 |
Family
ID=7871695
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99932712A Expired - Lifetime EP1089837B1 (en) | 1998-06-23 | 1999-06-23 | Tool holder with punching units |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1089837B1 (en) |
JP (1) | JP2002518184A (en) |
AT (1) | ATE217818T1 (en) |
AU (1) | AU6310499A (en) |
CA (1) | CA2336066A1 (en) |
DE (1) | DE19827850A1 (en) |
WO (1) | WO1999067039A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7954404B2 (en) | 2008-04-29 | 2011-06-07 | Mate Precision Tooling, Inc. | Punch device with adjustment subassembly as retrofit insert or as original equipment |
CN102581123A (en) * | 2011-12-13 | 2012-07-18 | 温州市长江标准件有限公司 | Die punching device |
US9233407B2 (en) | 2013-07-16 | 2016-01-12 | Mate Precision Tooling, Inc. | Multipunch with axial retainer for securing multiple dies or strippers |
KR102387060B1 (en) * | 2020-06-16 | 2022-04-14 | 임용성 | Punching apparatus for abrasive article |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2610768B2 (en) * | 1993-03-31 | 1997-05-14 | 株式会社アマダメトレックス | Punching mold |
JP2669787B2 (en) * | 1993-10-01 | 1997-10-29 | 株式会社アマダメトレックス | Punching die stripper device and punch assembly using the device |
EP0684095B1 (en) * | 1994-05-27 | 1998-08-12 | Amada Metrecs Company, Limited | Punching tool |
-
1998
- 1998-06-23 DE DE19827850A patent/DE19827850A1/en not_active Withdrawn
-
1999
- 1999-06-23 EP EP99932712A patent/EP1089837B1/en not_active Expired - Lifetime
- 1999-06-23 WO PCT/EP1999/004334 patent/WO1999067039A1/en active IP Right Grant
- 1999-06-23 JP JP2000555712A patent/JP2002518184A/en active Pending
- 1999-06-23 AU AU63104/99A patent/AU6310499A/en not_active Abandoned
- 1999-06-23 CA CA002336066A patent/CA2336066A1/en not_active Abandoned
- 1999-06-23 AT AT99932712T patent/ATE217818T1/en not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO9967039A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1999067039A1 (en) | 1999-12-29 |
DE19827850A1 (en) | 1999-12-30 |
JP2002518184A (en) | 2002-06-25 |
CA2336066A1 (en) | 1999-12-29 |
ATE217818T1 (en) | 2002-06-15 |
EP1089837B1 (en) | 2002-05-22 |
AU6310499A (en) | 2000-01-10 |
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