EP0529705A1 - Programmierbare Maschine zum Blechtafeln zu stanzen - Google Patents

Programmierbare Maschine zum Blechtafeln zu stanzen Download PDF

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Publication number
EP0529705A1
EP0529705A1 EP92202336A EP92202336A EP0529705A1 EP 0529705 A1 EP0529705 A1 EP 0529705A1 EP 92202336 A EP92202336 A EP 92202336A EP 92202336 A EP92202336 A EP 92202336A EP 0529705 A1 EP0529705 A1 EP 0529705A1
Authority
EP
European Patent Office
Prior art keywords
crown
punches
operating
same
clamp
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Withdrawn
Application number
EP92202336A
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English (en)
French (fr)
Inventor
Guido Salvagnini
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Salvagnini SpA
Original Assignee
Salvagnini SpA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Salvagnini SpA filed Critical Salvagnini SpA
Publication of EP0529705A1 publication Critical patent/EP0529705A1/de
Withdrawn legal-status Critical Current

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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
    • B21D28/36—Perforating, i.e. punching holes using rotatable work or tool 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
    • 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

Definitions

  • the present invention relates to a programmable machine for punching large sheet metal plates, having the possibility of meeting different punching requirements.
  • Machines for punching large sheet metal plates have a force structure substantially conformed in the shape of a swan neck, with an upper arm supporting a punch and a corresponding operating device, a lower arm supporting a matrix and defining a horizontal operating plane, on which the sheet metal plate to be punched is placed, and a throat that is as long as the width of the same sheet metal plate; a manipulator moves the sheet metal plate in the operating plane along two orthogonal axes, so that every point of the sheet itself can be punched according to a programmed operating plan.
  • the machines also include an automatic device for replacing the punch and the matrix in the respective operating positions.
  • the one of the two that remains outside must be placed on an extension of the swan's nech lower arm.
  • the upper arm is also extended and the two arms are joined at the extremity, and the swan neck structure is transformed into a portal-like structure.
  • the size of the machine is greater than with the swan neck structure alone and often the installation of the machine at the location where it is to operate requires long operations because, for the convenience of building the structure, the support of the manipulator or of the tool-changing device is a distinct unit that must be fixed to the floor and aligned separately.
  • the manipulator of punching machines on the market today has a certain number of clamps, that grasp the sheet metal plate along one of the edges.
  • the operator programming the machine must so arrange things that the clamps grasp the sheet in areas where no punch is to be executed, otherwise the punching tools would interfere with the clamps themselves. Very frequently this is not possible and several operations must be programmed on the sheet.
  • a first object of the present invention is that of applying both the manipulator and the tool-changing device directly on the swan neck structure, avoiding increases in size and difficulties of installation and so that the machine can be assembled completely by the manufacturer and then moved and installed without disassemblying and reassembling it.
  • a second object of the present invention is that of automatically avoiding the interference between the manipulator's clamps and the tools, so that the operator is free from any worry relating to this possibility.
  • a machine capable of punching metal plates, particularly in large sheets, comprising a force structure substantially conformed in the shape of a swan neck defining a horizontal operating plane for a sheet of metal plate and provided with at least one punch operationally connected to an operating device, with at least one matrix and with a manipulator comprising in turn at least one carriage, slidably supported by said swan neck structure and that supports in an orthogonally slidable way at least one bar provided with clamps operationally connected to actuator means capable of operating them so as to grasp and release said sheet metal plate, said machine being characterized in that it comprises at least one first rotating disk provided at the periphery with at least one crown of radial seats, that house at least one crown of punches operationally connected to said operating device, and at least one second rotating disk provided at the periphery with at least one crown of radial seats that house at least one crown of matrices, said disks being rotatably supported by said swan neck structure by means of horizontal pivots having
  • said first rotating disk is provided at the periphery with two crowns of radial seats, that house two crowns of punches
  • said second rotating disk is provided at the periphery with two crowns of radial seats for matrices, the punches of said two crowns being operationally connectable to said operating device by means of a tappet displaceable by a hydraulic or pneumatic actuator between a position of engagement with the punches of one crown and another position of engagement with the punches of the other crown.
  • said manipulator comprises a control device for each clamp operationally connected to said actuator means and to means for detecting a pre-selected stop, said control means being capable of operating the same clamp to release said sheet when said stop is detected, each of said clamps being supported by said bar in a manner that is independently slidable in said sliding direction of the carriage, and being capable of engaging with a pre-selected limit stop, capable of preventing it from chasing said sheet metal plate, against the action of thrust means capable of keeping it up against another limit stop integral with said bar.
  • the proposed machine is an optimum solution as regards the problem of tool changes, size, transportability and installation on site; it also has a high degree of safety due to the presence of a control device, that in case of need opens one clamp and stops it before in interferes with the punching tool, allowing the other clamps to continue moving the sheet metal plate to be punched.
  • FIG.s 1 and 2 There is shown as a whole in Fig.s 1 and 2 a programmable machine for punching large sheet metal plates, accomplished according to the invention.
  • a swan neck structure formed by an upper arm 12 and by a lower arm 13;
  • the upper arm 12 is provided with a pivot 14 suitable for rotatably supporting, by means of ball-bearings 17, visible in Fig. 3, a rotating punch-holding disk, indicated as a whole with 15;
  • the lower arm 13 is provided with a pivot 16 suitable for rotatably supporting, by means of ball-bearings 170, visible in Fig.s 8 and 9, a rotating matrix-holding disk, indicated as a whole with 18.
  • the pivots 14 and 16 of the two disks 15 and 18 are horizontal and have axes 19 and 20 that are complanar and one above the other, lying in a vertical centre-line plane, indicated with 10 in Fig. 2, and support the same disks in a manner complanar and one above the other, one upper 15 and one lower 18, on the front of the swan neck structure 11.
  • the punch-holding disk 15 is provided, at the periphery, with a crown of radial cylindrical seats 21, suitable for housing a crown of punches 22, provided with shanks 23, on which there act holding springs 24 and with which a stem 25 of a hydraulically-operated twin-action piston 26 can engage, that, together with a cylinder 27 integral with the pivot 14, forms an operating device, indicated as a whole with 28; with the pivot 14 there is integral a partially-annular guide plate, indicated with 37.
  • twin-action piston 26 of the operating device 28 is provided with a stem 29 with a T-shaped slot 30, by means of which it is capable of engaging, in push and pull, with the also T-shaped head 31 of the shank 23 of a punch 22, held in its seat 21 by a pawl 32.
  • the punch-holding disk is, on the other hand, provided, at the periphery, with two crowns of radial cylindrical seats 21, suitable for housing two crowns of punches 22;
  • the shank 23 of the punches 22 can, against the action of holding springs 24, engage with the stem 25 of the twin-action piston 26, through an elastically urged tappet, indicated as a whole with 33, displaceable by a hydraulically-operated piston 34, between two positions of engagement with the punches 22 of one or of the other crown; in the embodiment of Fig.
  • the stem 29 of the piston 26 has a T-shaped slot 30 that engages with the T-shaped head 35 of a tappet 330, operated by the piston 34; the tappet 330 is provided with a T-shaped slot 36 suitable for engaging with the T-shaped heads 31 of the shanks 23 of the punches 22 of one or of the other crown, as also shown in Fig. 7.
  • a matrix-holding disk 18 that, at the periphery, is provided with a crown of radial seats 280 for matrices 38, each corresponding to a punch 22 of the punch-holding disk 15.
  • a passage 39 for discharging processing scrap is fastened to the lower arm 13 of the swan neck 11.
  • a matrix-holding disk 180 that, at the periphery, is provided with two crowns of radial seats 280 for matrices 38, each corresponding to a punch 22 of the two punch-holding disks 150 of Fig.s 5 and 6.
  • the punch-holding disks 15, 150 and the matrix-holding disks 18, 180 are made to rotate by an electric motor 40 through a unit for the transmission of motion indicated as a whole with 41, comprising toothed pulleys 42, 43, 44, a toothed belt 45, transmission shafts 46 and 47 and toothed pinions 48 and 49 engaging with toothed wheels 50 and 51 made integral with the punch-holding disk 15 and with the matrix-holding disk 18, respectively.
  • Fig.s 3-9 there are shown with 52 and 53 hydraulically-operated bolts, suitable for engaging with notches 54 and 55, also visible in Fig. 2, obtained on the front surfaces of the disk 15, or 150, and of the disk 18, or 180, respectively, at each punch 22 and at each matrix 38; the bolts 52 and 53 are used to clamp the same disks in any pre-selected operating position.
  • an operating plane provided with brushes made of plastic material fibres, not shown, on which the sheet metal plane to be punched is caused to move; said brushes are preferably made as described in the Italian patent application No. 21819 A/90, in the name of the same Applicant.
  • the electric motor 40 is operationally connected, by means of a line 110, to an electronic control unit, indicated digrammatically by the block 57 of Fig. 1, by means of which an operator executes pre-selected operating cycles of the machine 10.
  • Solenoid valves, not shown, of the actuators of the bolts 52 and 53 are operationally connected to the same control unit 57.
  • a manipulator shown in Fig.s 1, 2 and 10, 11, constituted by a carriage 62 sliding in horizontal guides 63 integral with the upper arm 12 of the swan neck structure 11, and by a clamp-holding bar 64 sliding in guides 65 integral with the same carriage 62, in a direction horizontal with, and orthogonal to, the guides 63.
  • the carriage 62 receives motion from an electric motor 66 through a mechanism with a screw 67 and nut 68, integral with the same carriage;
  • the clamp-holding bar 64 receives motion from an electric motor 69 through a speed reduction unit, not represented, and a mechanism with a pinion 70 and a rack 71, integral with the same clamp-holding bar;
  • the electric motors 66 and 69 are operationally connected to the control unit 57 through lines 111 and 112.
  • the clamp-holding bar 64 slidingly supports clamps indicated as a whole with 73, clearly visible in Fig.s 10 and 11; each clamp 73 is formed by a lower jaw 75 and by an upper jaw 76.
  • each clamp is guided in its sliding motion by four rollers 74, mounted idle in the bar 64 and provided with races suitable to engage themselves with the V-shaped sides of the same lower jaw 75, as also shown in Fig. 12; each jaw 75 is provided with fins 176, which are up against two rollers 74 under the thrust exerted by a chain 77, visible in Fig. 10, through idle pinions 78, whose pivots are integral with each of the jaws 75; the chain 77 is also wound round the idle pinions 79, whose pivots are integral with the clamp-holding bar 64, and is kept tight by a pneumatic actuator 80, with a cylinder and piston, through an idle pinion 81, whose pivot is integral with the stem of the piston of the same actuator 80.
  • a pneumatic actuator 80 with a cylinder and piston, through an idle pinion 81, whose pivot is integral with the stem of the piston of the same actuator 80.
  • each clamp 73 that is provided with a tooth 82 for grasping the sheet metal plate, is supported by the jaw 75 by means of a pivot 83 having a partially spherical head, against which it is kept by a spring 84, and is housed with a small clearance in a seat 85 obtained in the same jaw 75;
  • the upper jaw 76 is connected to a movable casing 86 of a hydraulic actuator indicated as a whole with 87, by means of a pivot-shaped extremity 88, inserted in a groove 89 of the same casing 86.
  • a control device comprising a lever 101 and a detector unit formed by a roller 102, capable of detecting a stop constituted by a ramp 103, obtained in the arm 12 of the swan neck structure 11; there is indicated with 104 a limit stop fastened to the lower arm 13 of the same structure 11.
  • a cylinder shown in Fig.s 1 and 2, that keeps the sheet metal plate slightly raised as it rests on the operational plane 56, during the rotation of the disks 15, 18, or 150, 180, to avoid any contact between the same sheet and the matrices 38 in motion.
  • the machine 10 described is initialized by the operator by introducing into the control unit 57 the information related to the programmed operating cycle.
  • the electric motor 40 On the basis of the programming data, the electric motor 40, through the transmission 41, rotates the punch-holding disks 15, or 150, and matrix-holding disks 18, or 180, in the same direction through a given angle to bring the pair of selected tools to the operating position, where they are clamped by the bolts 52 and 53; the sheet metal plate to be punched is placed on the operating plane 56, that, as has already been said, is preferably provided with brushes suitable for supporting the same sheet, while still allowing the free movement of the clamps 73; the same sheet is positioned by the operator so that it assumes the desired initial position with respect to the manipulator 60 and to the pair constituted by punch 22 and matrix 38, brought to the operating position; the clamps 73 are then operated through the electro-distributor 95 and the distributors 94, that, by sending oil under pressure to the chambers 93 of the actuators 87, cause the casing 86 to move upwards and the upper jaws 76 of the same clamps to grasp the the sheet metal plate between the tooth 82 and
  • the punching operation of the sheet metal plate is executed, with the scrap discharged through the passage 39.
  • the clamps 73 are made to translate by the bar 64 and/or by the carriage 62 of the manipulator 60, whose movements are operated by the electric motor 69 and by the mechanism with a pinion 70 and rack 71, and by the electric motor 66 and by the mechanism with a screw 67 and nut 68, respectively.
  • the control device 100 of the manipulator 60 allows the automatic exclusion of the clamp 73 that would interfere with the punch 22 in the operating position.
  • the operational pair is selected by means of the piston 34 and the tappet 33 of Fig. 5, or the tappet 330 of Fig.s 6 and 7.
  • Advantages of the proposed machine 10 are a small size and the ease of transportation and installation on site, as it is entirely assembled and tested in the production workshop.
  • the described machine 10 is also easy to programme due to the control device 100 capable of opening the clamp 73 and of bringing to a stop if it can interfere with a punch 22, while the other clamps can continue their motion, moving the sheet metal plate to be punched along with them.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
  • Punching Or Piercing (AREA)
EP92202336A 1991-08-30 1992-07-29 Programmierbare Maschine zum Blechtafeln zu stanzen Withdrawn EP0529705A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI912334A IT1251197B (it) 1991-08-30 1991-08-30 Macchina programmabile per punzonare lamiera in grandi fogli.
ITMI912334 1991-08-30

Publications (1)

Publication Number Publication Date
EP0529705A1 true EP0529705A1 (de) 1993-03-03

Family

ID=11360602

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92202336A Withdrawn EP0529705A1 (de) 1991-08-30 1992-07-29 Programmierbare Maschine zum Blechtafeln zu stanzen

Country Status (3)

Country Link
EP (1) EP0529705A1 (de)
JP (1) JPH05200452A (de)
IT (1) IT1251197B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115255089A (zh) * 2022-06-23 2022-11-01 南通长源重工机械有限公司 一种带有夹持结构的防护型冲压装置
CN115415403A (zh) * 2022-11-03 2022-12-02 泉州市范特西智能科技有限公司 一种机械钢板智能冲孔设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1243492A (fr) * 1959-09-02 1960-10-14 Ets Grimar Machine à poinçonner
US4250785A (en) * 1979-06-02 1981-02-17 Yamazaky Iron Works Turret type punch press having a plurality of strikers
EP0055880A2 (de) * 1981-01-07 1982-07-14 Tommaso Pavone Vorrichtung zum Stanzen und Knabbern, welche umdrehende Matrizenträger mit horizontalen und parallelen Achsen enthält
US4589317A (en) * 1983-12-30 1986-05-20 U.S. Amada Limited Sheet or plate material machining equipment
EP0377865A2 (de) * 1989-01-11 1990-07-18 Giancarlo Piccini Stanz- und Nibbel-Maschine mit automatischer Werkzeugschnellwechselvorrichtung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1243492A (fr) * 1959-09-02 1960-10-14 Ets Grimar Machine à poinçonner
US4250785A (en) * 1979-06-02 1981-02-17 Yamazaky Iron Works Turret type punch press having a plurality of strikers
EP0055880A2 (de) * 1981-01-07 1982-07-14 Tommaso Pavone Vorrichtung zum Stanzen und Knabbern, welche umdrehende Matrizenträger mit horizontalen und parallelen Achsen enthält
US4589317A (en) * 1983-12-30 1986-05-20 U.S. Amada Limited Sheet or plate material machining equipment
EP0377865A2 (de) * 1989-01-11 1990-07-18 Giancarlo Piccini Stanz- und Nibbel-Maschine mit automatischer Werkzeugschnellwechselvorrichtung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115255089A (zh) * 2022-06-23 2022-11-01 南通长源重工机械有限公司 一种带有夹持结构的防护型冲压装置
CN115255089B (zh) * 2022-06-23 2024-05-10 南通长源重工机械有限公司 一种带有夹持结构的防护型冲压装置
CN115415403A (zh) * 2022-11-03 2022-12-02 泉州市范特西智能科技有限公司 一种机械钢板智能冲孔设备

Also Published As

Publication number Publication date
JPH05200452A (ja) 1993-08-10
IT1251197B (it) 1995-05-04
ITMI912334A0 (it) 1991-08-30
ITMI912334A1 (it) 1993-02-28

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