EP0941834A1 - Dispositif d'ajustement de la presion de course dans une presse de formage - Google Patents

Dispositif d'ajustement de la presion de course dans une presse de formage Download PDF

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Publication number
EP0941834A1
EP0941834A1 EP98104093A EP98104093A EP0941834A1 EP 0941834 A1 EP0941834 A1 EP 0941834A1 EP 98104093 A EP98104093 A EP 98104093A EP 98104093 A EP98104093 A EP 98104093A EP 0941834 A1 EP0941834 A1 EP 0941834A1
Authority
EP
European Patent Office
Prior art keywords
members
press
uprights
fit
die shoe
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Withdrawn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
EP98104093A
Other languages
German (de)
English (en)
Inventor
Renato Guarino
Gennaro Del Gaudio
Giulio Picone
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.)
Battaglia Bergomi Claudia
Original Assignee
Battaglia Bergomi Claudia
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 Battaglia Bergomi Claudia filed Critical Battaglia Bergomi Claudia
Priority to EP98104093A priority Critical patent/EP0941834A1/fr
Publication of EP0941834A1 publication Critical patent/EP0941834A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0029—Details of, or accessories for, presses; Auxiliary measures in connection with pressing means for adjusting the space between the press slide and the press table, i.e. the shut height
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0029—Details of, or accessories for, presses; Auxiliary measures in connection with pressing means for adjusting the space between the press slide and the press table, i.e. the shut height
    • B30B15/0041—Control arrangements therefor

Definitions

  • the present invention relates to conversion presses.
  • the invention concerns an adjustment device of the stroke pressure in conversion presses for converting stock shells into easy-open covers used as closing ends for drink and food cans and the like, although it is understood that the invention is also applicable to presses for working stocks of different kinds.
  • Conversion presses for semi-raw shells comprising fixtures designed for converting such shells in easy-open covers, by virtue of a tab application that allows the opening of the cover.
  • Known presses generally include a bed that supports lateral uprights on which is fastened, by means of tie rods extending through the uprights, a crown that generally supports the main drive of the press motion members.
  • Sliding support guides for a ram which supports the tools of the press upper die shoe, are connected to the uprights.
  • the main disadvantage of known presses is that the elevated stroke rate and the elevated work effort connected to the press operating cause member elastic deformations of the presses, principally the movement deformation. Moreover there are elongation effects by thermal expansion for such members.
  • the uprights, the crown, the ram and besides the main component of the driving members like for instance the connecting rods and the crankshaft are influenced differently by thermal effect variations: mostly these elements contribute to the distance variation between the upper and lower die shoe tools.
  • the press stroke pressure varies during the productive cycle in consequence of the working space variation between the upper and the lower die shoe tools: this fact influences the shell working, particularly on scoring depth of their output or opening inlet and therefore on the qualitative level of formed covers.
  • the main object of the present invention is therefore to propose a device for conversion presses fit to check and regulate the press stroke pressure compensating thermal expansion and elastic deformation effects to which the main press components are submitted during its running.
  • Another object of the present invention is to propose a device able to check and correct continuously the press stroke pressure with quick response times.
  • Further object of the present invention is to propose a device of easy realization and reliable running and maintenance.
  • numeral 40 refers to a stroke pressure adjustment device in a conversion press 100 of shells into easy-open covers for drink or in general food cans.
  • the press 100 includes a bed 26, a crown 1, and uprights 4.
  • the crown 1 is supported by the uprights 4 and is provided with motion members 60 of a ram 3, sliding by means of the longitudinal guides 21 and supporting an upper die shoe 6.
  • Lower 5 and upper 6 die shoes normally support dies or tooling destined to progressive conversion of the shells into covers provided with tear tab.
  • a conveyor belt of the shells slides longitudinally, that are progressively converted into formed covers by means of the cyclical stroke of the upper die on the lower one.
  • each upright 4 Inside each upright 4 is housed a connecting rod that maintains mutually constrained the crown 1 and the bed 26.
  • the rectangular shaped bolster 10 includes an upper plate 10a, supporting the lower die shoe 5, and a lower plate 10b, fixed to the bed 26.
  • the plates, upper 10a and lower 10b, are mutually connected by means of guides 11, placed near the plate edges.
  • Each guide is essentially constituted by a cylindrical pivot, connected with the upper plate 10a by means of a spherical cage 31 and a bush 32 and with the lower plate 10b by means of an housing hole made in this latter.
  • spacer members 70 are interposed, that include two couples of opposed movable wedge elements 71 co-operating with correspondent fixed wedge elements 72 locked to the upper plate 10b inside surface.
  • Such couples of movable wedge elements 71 are driven by motion means 80 that include, for each couple, a threaded rod 82 supported by a bracket 83 fixed to the lower plate 10b and rotating by operating a motor member 17.
  • each threaded rod 82 is engaged in correspondent threaded nuts 81, each fixed to the side wall of every movable wedge element 71.
  • the threaded rod 82 has opposed threads in such a way that the rotation of said rod causes the mutual distance variation between the movable wedges 41.
  • hydrostatic sumps are carried out delimited by an hydrostatic sump boundary conduct 84.
  • the bolster 10 comprises moreover reaction members 90 put between the upper 10a and lower 10b plates.
  • Such reaction members 90 include four pistons 91, placed near the edges of plates forming the bolster 10, each having an end locked at the upper plate 10a and the other end widened and housed within a seal box 92 made in the lower plate 10b and containing a pressure fluid.
  • the stoke adjustment device 40 includes moreover sensor members 7 placed on the uprights 4 and fit to detect their longitudinal dimensional variations.
  • the sensor members 7 are constituted by electric elongation sensors joined to the uprights 4, for instance they are particular resistances called "strain gauge”.
  • the device 40 includes also control and command means 50 that receive in input the signals of the sensor members 7 and send a control signal, through an estensimetric device 8, to a comparator 16 between this last signal and a reference signal 19 pre-established in the device, fit to provide a operating signal to the motor member 17 that therefore starts the spacer members 70.
  • the running of the device 40 is simple because, once the press 100 is opereated, the sensor members 7 send a signal proportional to the elongation (or shrinkage) of the uprights 4 to the estensimetric device 8 that sends a control signal to a comparator 16 that compares between this last signal with a reference signal 19 pre-established in the device.
  • This comparator 16 sends a signal to the motor member 17 that drives the threaded rods 82 rotating them inside the threaded nuts 81 of each movable wedge 71.
  • reaction members 90 opposing to the upper plate 10a vertical shifting, guarantee a correct positioning within the normal running limits.
  • the stroke or closing pressure of the press 100 is dynamically regulated.
  • the sensor members 7 are constituted besides by load cells 23 placed under the bolster 10 and are fit to send a signal proportional to the stroke pressure of the press 100 to the control and command means 50 so as to regulate the stroke pressure, in feedback, by means of the activation of the spacer means 70.
  • the two threaded rods 82 are connected by a mechanism, for instance through a chain, and connected to the motor member 17 that can be, for instance, a step by step motor.
  • the main advantage of the present invention is therefore to provide a device for conversion presses fit to check and regulate the press stroke pressure compensating thermal expansion and elastic deformation effects to which the main press moving component are submitted during the press operating.
  • Another advantage of the present invention is to provide a device fit to check and correct continuously the press stroke pressure, varying the upper plate position, with rapid response times.
  • Ulterior advantage of the present invention is to provide a device of easy realization and reliable operation and maintenance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
EP98104093A 1998-03-09 1998-03-09 Dispositif d'ajustement de la presion de course dans une presse de formage Withdrawn EP0941834A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP98104093A EP0941834A1 (fr) 1998-03-09 1998-03-09 Dispositif d'ajustement de la presion de course dans une presse de formage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98104093A EP0941834A1 (fr) 1998-03-09 1998-03-09 Dispositif d'ajustement de la presion de course dans une presse de formage

Publications (1)

Publication Number Publication Date
EP0941834A1 true EP0941834A1 (fr) 1999-09-15

Family

ID=8231550

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98104093A Withdrawn EP0941834A1 (fr) 1998-03-09 1998-03-09 Dispositif d'ajustement de la presion de course dans une presse de formage

Country Status (1)

Country Link
EP (1) EP0941834A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1193046A1 (fr) * 2000-09-30 2002-04-03 Bruderer Ag Procédé de commande de la position angulaire mutuelle entre le coulisseau et la table de fixation d'une poinçonneuse et poinçonneuse pour la mise en oeuvre de ce procédé
EP1308268A1 (fr) * 2001-11-06 2003-05-07 Haulick + Roos GmbH Machine automatique pour le pressage ou l'estampage
CN109047444A (zh) * 2018-09-05 2018-12-21 山东迈特力重机有限公司 一种压力机箱体式顶冠结构

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2039644A1 (de) * 1970-08-10 1972-03-23 Schuler Gmbh L Vorrichtung zum Einstellen des Abstandes zwischen dem Oberwerkzeug und dem Stoessel einer Presse
US3889515A (en) * 1974-07-22 1975-06-17 Nat Machinery Co Wedging structure for presses or the like
US4918956A (en) * 1987-08-27 1990-04-24 The Minster Machine Company Monitorable and compensatable feedback tool and control system for a press using a solid tool backup element
EP0459224A1 (fr) * 1990-05-31 1991-12-04 Siemens Aktiengesellschaft Méthode d'actionnement d'une presse
EP0596697A1 (fr) * 1992-11-05 1994-05-11 Toyota Jidosha Kabushiki Kaisha Procédé et dispositif pour mesurer et régler les forces de pressage dans une presse
EP0741001A2 (fr) * 1995-05-04 1996-11-06 Gietz AG Estampeuse, imprimeuse et poinçonneuse
US5609099A (en) * 1995-10-06 1997-03-11 The Minster Machine Company Press shutheight adjustment mechanism with hydrostatic bearing pads

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2039644A1 (de) * 1970-08-10 1972-03-23 Schuler Gmbh L Vorrichtung zum Einstellen des Abstandes zwischen dem Oberwerkzeug und dem Stoessel einer Presse
US3889515A (en) * 1974-07-22 1975-06-17 Nat Machinery Co Wedging structure for presses or the like
US4918956A (en) * 1987-08-27 1990-04-24 The Minster Machine Company Monitorable and compensatable feedback tool and control system for a press using a solid tool backup element
EP0459224A1 (fr) * 1990-05-31 1991-12-04 Siemens Aktiengesellschaft Méthode d'actionnement d'une presse
EP0596697A1 (fr) * 1992-11-05 1994-05-11 Toyota Jidosha Kabushiki Kaisha Procédé et dispositif pour mesurer et régler les forces de pressage dans une presse
EP0741001A2 (fr) * 1995-05-04 1996-11-06 Gietz AG Estampeuse, imprimeuse et poinçonneuse
US5609099A (en) * 1995-10-06 1997-03-11 The Minster Machine Company Press shutheight adjustment mechanism with hydrostatic bearing pads

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1193046A1 (fr) * 2000-09-30 2002-04-03 Bruderer Ag Procédé de commande de la position angulaire mutuelle entre le coulisseau et la table de fixation d'une poinçonneuse et poinçonneuse pour la mise en oeuvre de ce procédé
EP1308268A1 (fr) * 2001-11-06 2003-05-07 Haulick + Roos GmbH Machine automatique pour le pressage ou l'estampage
CN109047444A (zh) * 2018-09-05 2018-12-21 山东迈特力重机有限公司 一种压力机箱体式顶冠结构

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