EP1445041A1 - Vorrichtung zur Erfassung der Stempelposition in einer Metallblech-Stanzmaschine mit mehreren Stempeln - Google Patents
Vorrichtung zur Erfassung der Stempelposition in einer Metallblech-Stanzmaschine mit mehreren Stempeln Download PDFInfo
- Publication number
- EP1445041A1 EP1445041A1 EP04075318A EP04075318A EP1445041A1 EP 1445041 A1 EP1445041 A1 EP 1445041A1 EP 04075318 A EP04075318 A EP 04075318A EP 04075318 A EP04075318 A EP 04075318A EP 1445041 A1 EP1445041 A1 EP 1445041A1
- 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.)
- Granted
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
-
- 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.
- 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 main advantage of this constructive system resides in that all the different punches that must be used in sequence in order to complete the punching working of a piece are available and ready to operate, without need to carry out any tool change operations during the production cycle; an improved productivity of the machine is therefore obtained, because the operations of substitution of the tools are avoided during the cycle and the total length of the distance that the piece, displaced by a manipulator along two directions perpendicular to each other, must cover in order to allow the execution of all the workings required on its surface is reduced.
- 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.
- FIG 1 a set of presses 1-4 for the control of respective punches 5 (only one shown) of a punching machine with several punches is shown.
- 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 upper chambers of the hydraulic cylinders 6-9 are connected with the nonreturn valves 21-24 and with lateral chambers of logical elements 16-19 by ducts 30-33.
- 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.
- the hydraulic circuit in Figure 1 is shown in the stand-by condition in which it is found when the servovalve 34 is in position B and the pre-setting valves 14-15 are in the stand-by position B.
- the connection between the lower chambers and the lateral chambers of the logical elements 16-19 is closed; the nonreturn valves 21-24 are in the opening position, therefore the upper chambers of the cylinders 6-9 are connected to discharge.
- the pistons 10-13 are kept raised in the position of upper stroke end by the pressure of the pump 48, supplied to the lower chambers of the cylinders 6-9.
- 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.
- FIG 4 the hydraulic circuit is shown in the condition in which the servovalve 34 is in a position comprised between A and B.
- the pressure of the upper chamber of the piston 10 gets adjusted, thus obtaining the possibility to arrest the same piston 10 in any mid position and also to make it go back upward, thus adjusting its speed both in descent as well as in ascent.
- the regulation is always meant as being carried out by the control unit 46, that receives in input the value of the position of the transducer 45, it calculates the speed and it consequently adjusts the extent of opening of the servovalve 34.
- 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 true EP1445041A1 (de) | 2004-08-11 |
| EP1445041B1 EP1445041B1 (de) | 2005-10-19 |
Family
ID=32652467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04075318A Expired - Lifetime EP1445041B1 (de) | 2003-02-07 | 2004-02-03 | Vorrichtung zur Erfassung der Stempelposition in einer Metallblech-Stanzmaschine mit mehreren Stempeln |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1445041B1 (de) |
| AT (1) | ATE306995T1 (de) |
| DE (1) | DE602004000132T2 (de) |
| DK (1) | DK1445041T3 (de) |
| ES (1) | ES2248782T3 (de) |
| IT (1) | ITMI20030217A1 (de) |
Cited By (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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0538725A1 (de) * | 1991-10-18 | 1993-04-28 | Institute Of Technology Precision Electrical Discharge Work's | Index-Vorschubsystem |
| US5301585A (en) * | 1991-05-27 | 1994-04-12 | Amada Sonoike Co., Ltd. | Punch pressing machine |
| WO1996026023A1 (en) * | 1995-02-24 | 1996-08-29 | Amada Company, Ltd. | Hydraulic actuator for punches and suchlike movable members for working sheet metal, and hydraulic system incorporating this actuator |
-
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/de 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
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5301585A (en) * | 1991-05-27 | 1994-04-12 | Amada Sonoike Co., Ltd. | Punch pressing machine |
| EP0538725A1 (de) * | 1991-10-18 | 1993-04-28 | Institute Of Technology Precision Electrical Discharge Work's | Index-Vorschubsystem |
| WO1996026023A1 (en) * | 1995-02-24 | 1996-08-29 | Amada Company, Ltd. | Hydraulic actuator for punches and suchlike movable members for working sheet metal, and hydraulic system incorporating this actuator |
Cited By (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 |
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 |
| DE602004000132D1 (de) | 2006-03-02 |
| ATE306995T1 (de) | 2005-11-15 |
| EP1445041B1 (de) | 2005-10-19 |
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