EP1445041B1 - Device for the detection of the position of punches in a sheet metal punching machine with several punches - Google Patents
Device for the detection of the position of punches in a sheet metal punching machine with several punches Download PDFInfo
- Publication number
- EP1445041B1 EP1445041B1 EP04075318A EP04075318A EP1445041B1 EP 1445041 B1 EP1445041 B1 EP 1445041B1 EP 04075318 A EP04075318 A EP 04075318A EP 04075318 A EP04075318 A EP 04075318A EP 1445041 B1 EP1445041 B1 EP 1445041B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pistons
- punches
- piston
- transducer
- detection
- 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
- 238000004080 punching Methods 0.000 title claims abstract description 15
- 238000001514 detection method Methods 0.000 title claims abstract description 9
- 239000002184 metal Substances 0.000 title claims abstract description 5
- 230000033001 locomotion Effects 0.000 claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005555 metalworking Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 230000003245 working effect 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
-
- 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
Definitions
- the present invention concerns a device for the detection of the position of the punches in a sheet metal punching machine with several punches (see for instance US-A-5 301 585)
- punching machines with multipress head that are made up of a plurality of hydraulic presses, one near the other, each one of which controls the vertical motion of a single punch.
- the object of the present invention is to provide a device for the detection of the position of the punch, that is usable for a plurality of punches of a machine with a number of punches of the aforesaid type.
- a device for the detection of the position of punches in a sheet metal punching machine comprising a plurality of punches controlled by respective pistons, characterised in that it comprises a single position transducer that is operatingly coupled to all the aforesaid pistons in unidirectional way so as to follow the punching movement of any piston, while the other pistons remain in rest position.
- Each press 1-4 is made up of a hydraulic cylinder 6-9 and of a piston 10-13 to which a respective punch 5 is fastened.
- a stem 35-38 extends upward onto which an arm 39-42 that projects laterally is fastened.
- the arms 39-42 of all the pistons 10-13 rest on a same plate 43 which is fastened in the mobile part 44 of a position transducer 45 connected with an electronic control unit 46.
- the plate 43 is thrust upward by a spring 47.
- a hydraulic control circuit which comprises a servovalve 34 with outlet connected with the lower chambers of logical elements 16-19 by a duct 20 and pre-setting valves 14-15 connected, downstream, with the upper chambers of the logical elements 16-19 and with control inlets of nonreturn valves 21-24 by ducts 25-28 and, upstream, with the bottom chambers of the hydraulic cylinders 6-9 by a duct 29.
- the duct 29 of the hydraulic circuit is supplied by a pump 48 which is connected by a duct 49 with the inlet of the servovalve 34, with a pressure accumulator 50 and with a safety valve 51.
- the servovalve 34 and the pre-setting valves 14-15 are controlled by the control unit 46.
- FIG 2 the hydraulic circuit is shown in the condition in which the position B 34 of the servovalve and the position A of the pre-setting valve 14 cause the pre-setting of the piston 10 and the relative punch 5 to the descent.
- Such pre-setting is generated by the closing of the nonreturn valve 21, whose control inlet is connected to discharge.
- the piston 10 is ready to receive pressure on the upper face.
- the nonreturn valves 22-24, the pre-setting valve 15 and the pistons 11-13 are in the condition of Figure 1.
- FIG 3 the hydraulic circuit is shown in the condition in which the operating position A of the servovalve 34 and the operating position A of the pre-setting valve 14 cause the descent of the piston 10.
- Such movement is generated by the increase in pressure of the upper chamber of the hydraulic cylinder 6, due to the lifting movement of the logical element 16, caused by the discharge of the upper chamber of the same logical element 16.
- the lower chamber of piston 10 remains in pressure, but its thrust area is smaller than the one of the upper chamber so that the net force on the piston 10 is as a result directed downward.
- the non-return valve 21 is closed; the nonreturn valves 21, 23 and 24, the pre-setting valve 15 and the pistons 10, 12 and 13 are in the condition of Figure 1.
- the descent of the piston 11 is controlled in similar way by switching the valve 14 in position C from the situation in Figure 1 to the one in Figure 2.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Punching Or Piercing (AREA)
- Details Of Cutting Devices (AREA)
- Control Of Presses (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI20030217 | 2003-02-07 | ||
IT000217A ITMI20030217A1 (it) | 2003-02-07 | 2003-02-07 | Dispositivo per il rilevamento della posizione dei punzoni |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1445041A1 EP1445041A1 (en) | 2004-08-11 |
EP1445041B1 true EP1445041B1 (en) | 2005-10-19 |
Family
ID=32652467
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04075318A Expired - Lifetime EP1445041B1 (en) | 2003-02-07 | 2004-02-03 | Device for the detection of the position of punches in a sheet metal punching machine with several punches |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1445041B1 (it) |
AT (1) | ATE306995T1 (it) |
DE (1) | DE602004000132T2 (it) |
DK (1) | DK1445041T3 (it) |
ES (1) | ES2248782T3 (it) |
IT (1) | ITMI20030217A1 (it) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109013864A (zh) * | 2018-09-14 | 2018-12-18 | 河南均美铝业有限公司 | 一种铝合金用冲压组合模具 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3295105B2 (ja) * | 1991-05-27 | 2002-06-24 | 株式会社アマダ | パンチプレス機 |
EP0700736B1 (en) * | 1991-10-18 | 1999-03-24 | Institute Of Technology Precision Electrical Discharge Work's | Index-feed machining system |
IT1278959B1 (it) * | 1995-02-24 | 1997-12-02 | Sapim Amada Spa | Attuatore idraulico per punzoni e simili organi scorrevoli per la lavorazione di lamiere, ed impianto incorporante tale attuatore. |
-
2003
- 2003-02-07 IT IT000217A patent/ITMI20030217A1/it unknown
-
2004
- 2004-02-03 DK DK04075318T patent/DK1445041T3/da active
- 2004-02-03 AT AT04075318T patent/ATE306995T1/de active
- 2004-02-03 EP EP04075318A patent/EP1445041B1/en not_active Expired - Lifetime
- 2004-02-03 DE DE602004000132T patent/DE602004000132T2/de not_active Expired - Lifetime
- 2004-02-03 ES ES04075318T patent/ES2248782T3/es not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ES2248782T3 (es) | 2006-03-16 |
DK1445041T3 (da) | 2006-05-29 |
ITMI20030217A1 (it) | 2004-08-08 |
DE602004000132T2 (de) | 2006-07-06 |
EP1445041A1 (en) | 2004-08-11 |
DE602004000132D1 (de) | 2006-03-02 |
ATE306995T1 (de) | 2005-11-15 |
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