EP0865840A1 - Verstellbare Matrizenbaugruppen - Google Patents

Verstellbare Matrizenbaugruppen Download PDF

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Publication number
EP0865840A1
EP0865840A1 EP97200800A EP97200800A EP0865840A1 EP 0865840 A1 EP0865840 A1 EP 0865840A1 EP 97200800 A EP97200800 A EP 97200800A EP 97200800 A EP97200800 A EP 97200800A EP 0865840 A1 EP0865840 A1 EP 0865840A1
Authority
EP
European Patent Office
Prior art keywords
die
half die
respect
die body
centre plane
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Withdrawn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
EP97200800A
Other languages
English (en)
French (fr)
Inventor
Wim Serruys
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.)
LVD Co NV
Original Assignee
LVD Co NV
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 LVD Co NV filed Critical LVD Co NV
Priority to EP97200800A priority Critical patent/EP0865840A1/de
Publication of EP0865840A1 publication Critical patent/EP0865840A1/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Withdrawn legal-status Critical Current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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • B21D5/0209—Tools therefor
    • B21D5/0227—Length adjustment of the die
    • 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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • B21D5/0209—Tools therefor

Definitions

  • the invention relates to a die assembly for sheet metal forming machines, such as edging or folding presses.
  • the invention more specifically relates to the so called “lower tools" of such assembly and in particular to laterally adjustable die jaws, pads or abutments of such lower tools.
  • Lower tools comprising displaceable jaws or pads so that the die width can be adjusted are for instance known from US patent 5,564,301.
  • this lower tool assembly separate die halves are obliquely displaceable in an horizontal plane, symetrically with respect to the centre line of the die assembly.
  • the die halves can be displaced with respect to each other by means of obliquely arranged slots and keys at the upper sliding surface of a base plate of the lower tool and at the lower sliding surfaces of the die halves.
  • the features of this adjustable die assembly offer certain advantages over previously known adjustable dies, but still present a number of drawbacks from the point of view of construction complexity and cost, and from the point of view of operation easiness.
  • the invention accordingly provides a die assembly for a sheet metal forming machine comprising a base plate and two half die bodies which are moveable with respect to each other to provide an adjustable die width between the jaws of said half die bodies, said half die bodies being each obliquely moveable with respect to the centre plane of the die assembly between said jaws, wherein a first half die body is arranged on the base plate, linearly moveable according to an angle alpha with respect to said centre plane, and a second half die body is arranged on said first half die body linearly moveable at an angle 2 times alpha with respect to said centre plane.
  • the first and second die body and the base plate are provided with cooperating obliquely arranged keys and oblique slots.
  • a movement of the first half die body in the longitudinal direction i.e. parallel to the centre plane of the die assembly
  • a transversal movement i.e. a movement perpendicular to the centre plane of the die assembly, of the first half die body, and simultaneously also of the second half die body, but in opposite direction.
  • the back half die body of the die assembly which is arranged on the base plate of the die assembly, whereas the front half die body is arranged on the back half die body.
  • the upper surface of the base plate is provided with at least one oblique slot, lying at an angle alpha with respect to the centre plane of the die assembly, and the bottom surface of the first half die body (preferably the back die) is provided with one or more corresponding oblique slots also lying at an angle alpha with respect to the centre plane, whereas a number of keys provided in said slots allow an oblique movement of the first half die body (preferably the back die) with respect to the base plate;
  • the upper surface of the first half die (preferably the back die) is provided with at least one oblique slot, lying at an angle 2 times alpha with respect to the centre plane, and the bottom surface of the second half die body (preferably the front die) is provided with one or more corresponding oblique slots also lying at an angle 2 times alpha with respect to the centre plane, whereas a number of keys provided in said slots allow an oblique movement of the first half die body (preferably the back die) with respect to the second half die body (preferably the front die).
  • the die assembly may comprise means to move the first half die body along a longitudinal direction parallel to the centre plane of the die assembly, and means to retain the second half die body in fixed position in said longitudinal direction, so that a movement of the first half die body along said longitudinal direction results in a symetric movement of the two half die bodies with respect to each other in the transversal direction perpendicular to the centre plane of the die assembly.
  • a movement of the first half die body (preferably the back die) in the longitudinal direction, i.e. parallel to the centre plane of the die assembly automatically results in a corresponding transversal movement, i.e. a movement perpendicular to the centre plane, of the first half die body (preferably the back die), and a simultaneous, symetric (i.e. in opposite direction) transversal movement of the second half die body (preferably the front die) over the same distance
  • the particular construction according to the present invention makes it possible to avoid the inherent drawback of the known constructions according to which the oblique slots must necesserily entirely lie outside the broadest die width, automatically resulting in a die assembly with very broad half dies, at the front as well as at the back. At the front side this does not constitute so much a problem, but at the back side it prevents making Z-folds in the metal sheets.
  • the width necessary for the oblique slots can lie entirely underneeth the die width. The back die can thus remain narrow so that making Z-folds in the metal sheets is not hindered.
  • a further advantage of the new principle resides in the fact that only one half die has to be moved longitudinally. This is easier and cheaper to achieve than having to move both half dies. Additionally, according to the new principle, only the back die has to be extended for the length corresponding to the longitudinal movement of the die, whereas in the known construction both half dies have to be considerably longer than the folding length.
  • the lower tool assembly for a sheet metal forming machine comprises a base plate (1) having an upper surface (13) supporting the lower surface (14) of a back half die body (2).
  • the back half die body (2) has an upper surface (15) supporting the lower surface (16) of a front half die body (3).
  • the upper surface (13) of the base plate(1) and the lower surface (14) of the back half die (2) are respectively provided with one oblique slot (9) and one oblique slot (8) - at an angle alpha with respect to the longitudinal direction of the lower tool assembly - cooperating with keys (7) to bring about a transverse movement of the back half body (2) with respect to the base plate (1) - i.e.
  • the upper surface (15) of the back half die (2) and the lower surface (16) of the front half die (3) are respectively provided with one oblique slot (12) and one oblique slot (11) - at an angle 2 alpha with respect to the longitudinal direction of the lower tool assembly - cooperating with keys (10) to bring about a transverse movement of the front half body (2) with respect to the back half body (2) (and with respect to the base plate (1)) - i.e. a movement perpendicular to the centre plane (Y,Z) of the lower tool assembly - when a longitudinal movement - parallel to the centre plane (Y,Z)- is imparted to the back half die body (2).
  • the width (4) between jaw (5) of the back half die body (2) and jaw (6) of the front half (3) die body can be adjusted by moving the back half die in the longitudinal direction, whereas the front half die body is maintained in place in the longitudinal direction.
  • Cooperation of the slots and keys of the base plate and the half die bodies results in a simetric movement of the two half die bodies with respect to each other, namely a movement of the the back die body (2) perpendicular to the centre plane (Y,Z), and a simultaneous, symetric (i.e. in opposite direction) transversal movement of the front die body (3) over the same distance.
  • Figures 3a, 3b and 4 illustrate another embodiment of the invention in which several parallel oblique slots - two in the present case - (11) and (11') are provided in the upper surface (15) of the back half die body (2), cooperating with several parallel keys - two in the present case - (10) and (10') provided to the lower surface (16) of the front half die body (3) - either directly or in corresponding slots in the front half die body (not represented)-.
  • the width (4) between the jaws of the half die bodies (2) and (3) can be adjusted by moving the back half die in longitudinal direction, whereas the front half die body is maintained in place, in a similar way as explained above in respect of the embodiment of figures 1 - 2.
  • FIG. 5 A representation of a lower tool assembly of the know type, as referred to hereabove in the discussion of the state of the art, is given in figure 5 to illustrate the more compact construction of a lower tool assembly according to the principle of the present invention.
  • both the back half die (2) and the front half die (3) have to be sufficiently broad to accommodate the oblique slots which must necesserilly extend beside the entire die width. It is clear that the die assembly according to the invention presents a considerable advantage also from this point of view.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP97200800A 1997-03-17 1997-03-17 Verstellbare Matrizenbaugruppen Withdrawn EP0865840A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP97200800A EP0865840A1 (de) 1997-03-17 1997-03-17 Verstellbare Matrizenbaugruppen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP97200800A EP0865840A1 (de) 1997-03-17 1997-03-17 Verstellbare Matrizenbaugruppen

Publications (1)

Publication Number Publication Date
EP0865840A1 true EP0865840A1 (de) 1998-09-23

Family

ID=8228117

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97200800A Withdrawn EP0865840A1 (de) 1997-03-17 1997-03-17 Verstellbare Matrizenbaugruppen

Country Status (1)

Country Link
EP (1) EP0865840A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1287916A2 (de) * 2001-08-29 2003-03-05 Angelo Romani S.p.A. Verstellbare Formmatrize insbesondere für Abkantpressen
WO2010099559A1 (de) * 2009-03-04 2010-09-10 Trumpf Maschinen Austria Gmbh & Co. Kg. Verfahren und werkzeug zum freibiegen mit einem einstellbaren gesenk
CN102632156A (zh) * 2012-04-25 2012-08-15 安徽联盟模具工业股份有限公司 钣金折弯模具的可调下模机构

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4106323A (en) * 1975-06-24 1978-08-15 Haennerle AG Bending tool
WO1994009924A1 (en) * 1992-10-26 1994-05-11 Nya Ursvikens Mekaniska Verkstads Ab Adjustable die assembly

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4106323A (en) * 1975-06-24 1978-08-15 Haennerle AG Bending tool
WO1994009924A1 (en) * 1992-10-26 1994-05-11 Nya Ursvikens Mekaniska Verkstads Ab Adjustable die assembly

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1287916A2 (de) * 2001-08-29 2003-03-05 Angelo Romani S.p.A. Verstellbare Formmatrize insbesondere für Abkantpressen
EP1287916A3 (de) * 2001-08-29 2003-04-16 Angelo Romani S.p.A. Verstellbare Formmatrize insbesondere für Abkantpressen
US6810710B2 (en) 2001-08-29 2004-11-02 Angelo Romani S.P.A. Adjustable forming die, in particular for forming presses
WO2010099559A1 (de) * 2009-03-04 2010-09-10 Trumpf Maschinen Austria Gmbh & Co. Kg. Verfahren und werkzeug zum freibiegen mit einem einstellbaren gesenk
CN102632156A (zh) * 2012-04-25 2012-08-15 安徽联盟模具工业股份有限公司 钣金折弯模具的可调下模机构

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