EP2241387B1 - Luftnockenaufbau für Umformwerkzeuge - Google Patents

Luftnockenaufbau für Umformwerkzeuge Download PDF

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Publication number
EP2241387B1
EP2241387B1 EP10157721.1A EP10157721A EP2241387B1 EP 2241387 B1 EP2241387 B1 EP 2241387B1 EP 10157721 A EP10157721 A EP 10157721A EP 2241387 B1 EP2241387 B1 EP 2241387B1
Authority
EP
European Patent Office
Prior art keywords
slide
arrest
guide unit
guide
aerial cam
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.)
Active
Application number
EP10157721.1A
Other languages
English (en)
French (fr)
Other versions
EP2241387A1 (de
Inventor
Alessandro Bertorello
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.)
OMCR Srl
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OMCR Srl
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Publication date
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Publication of EP2241387A1 publication Critical patent/EP2241387A1/de
Application granted granted Critical
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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
    • B21D5/04—Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work
    • 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
    • B21D28/32—Perforating, i.e. punching holes in other articles of special shape
    • B21D28/325—Perforating, i.e. punching holes in other articles of special shape using cam or wedge mechanisms, e.g. aerial cams

Definitions

  • the present invention relates to an aerial cam for dies for forming sheet metal having a top half-die and a bottom half-die that are mobile with respect to one another in a vertical direction between an open position and a closed position, according to the preamble of claim 1.
  • An aerial cam comprises a slide that is mobile in a direction inclined with respect to the direction of movement of the half-dies.
  • the slide carries at least one tool for machining the sheet metal and is mobile between a resting position and a working position in a direction inclined with respect to the direction of movement of the half-dies.
  • the slide co-operates with a top guide unit, which is to be fixed to the top half-die, and with a bottom guide unit, which is to be fixed to the bottom half-die.
  • the slide is compressed between opposite guide surfaces of the top and bottom guide units, said guide surfaces being inclined with respect to the direction of movement of the half-dies.
  • the slide is displaced from its resting position to its working position against the action of elastic means that tend to keep it in the resting position.
  • Aerial cams are always equipped with arrest means that define a contrast surface, against which the slide is pushed by the aforesaid elastic means into the resting position.
  • said arrest means are provided on the top guide unit and are generally set for co-operating with a rear surface of the slide.
  • to obtain a rigid arrest of the slide in the resting position it is necessary to make the top guide unit with a shape that envelops the slide. Consequently, in the known solutions the top guide unit is formed by a massive body that requires complex machining operations.
  • a solution of this type is known, for example, from the document No. EP 1 197 319 on which the preamble of claim 1 is based.
  • the object of the present invention is to provide a more compact aerial cam, which will have a more contained cost as compared to known solutions and in which the element for arrest of the slide in the resting position is rigid and has a simple structure and that does not require complex machining operations.
  • said object is achieved by an aerial cam having the characteristics forming the subject-matter of Claim 1.
  • the arrest means against which the slide is pushed elastically into the resting position are provided on side vices that connect the slide to the top guide unit in a mobile way.
  • This arrangement enables reduction of the dimensions and weight of the top guide unit and simplification of the operations for machining the top guide unit.
  • Designated by 10 in the figures is an aerial cam for dies for forming sheet metal, in particular for cold plastic deformation of sheet metal.
  • the aerial cam 10 is to be used in a die having a top half-die and a bottom half-die that are mobile with respect to one another in a vertical direction between an open position and a closed position.
  • the aerial cam 10 comprises a top guide unit 12, which is to be fixed to a top half-die (not illustrated), and a bottom guide unit 14, which is to be fixed to a bottom half-die (not illustrated either).
  • the top guide unit 12 has a first guide 16.
  • the first guide 16 is a concave V-shaped guide provided with two applied slide plates 18.
  • the bottom guide unit 14 is provided with a second guide 20.
  • the second guide 20 is a convex V-shaped guide including two applied slide plates 22.
  • the aerial cam 10 comprises a slide 24 carried by the top guide unit 12.
  • the slide 24 has a third guide 26 that co-operates with the first guide 16 of the top guide unit 12.
  • the third guide 26 is a convex V-shaped guide preferably provided with applied slide plates 28.
  • the slide 24 has a front surface 28 and two mutually parallel side surfaces 30.
  • a tool 32 ( Figure 2 ) is to be fixed on the front surface 28 of the slide 24.
  • the slide 24 has a fourth guide 34, which co-operates with the second guide 20 of the bottom guide unit 14 during the step of closing of the die.
  • the fourth guide 34 is a concave V-shaped guide and is preferably provided with applied slide plates 36.
  • the slide 24 is connected to the top guide unit 12 by means of two side vices 38 set on opposite sides of the slide 24.
  • Each side vice 38 has on an inner surface a substantially L-shaped projection 40 that engages with precise geometrical and dimensional fit a corresponding L-shaped seat 42 formed in a side wall 44 of the top guide unit 12.
  • the side vices 38 are fixed to the top guide unit 12 by means of screws 46.
  • the precise geometrical and dimensional fit between the projections 40 and the corresponding seats 42 means that the forces applied to the vices 38 in directions orthogonal to the axes of the screws 46 have no repercussions on the screws themselves.
  • Each side vice 38 is moreover equipped on its inner surface with a retention projection 48, which slidably engages a corresponding retention groove 50 formed in the corresponding side wall 30 of the slide 24.
  • the retention projections 48 and the retention grooves 50 are parallel to the guides 16 and 26.
  • An elastic element 52 is set between the top guide unit 12 and the slide 24.
  • the elastic element 52 exerts on the slide 24 a force parallel to the guides 16 and 26 and oriented in the direction indicated by the arrows 54 in Figures 3 and 4 .
  • the elastic element 52 can be constituted by a helical spring, by a gas-operated spring, or by any other member designed to apply an elastic force.
  • Each side vice 38 carries a respective arrest member 56.
  • Each arrest member 56 is inserted with precise geometrical and dimensional fit into a housing 58 formed in a bottom wall 60 of the respective side vice 38.
  • Each arrest member 56 is fixed to the respective side vice 38 by means of screws 62.
  • the precise geometrical and dimensional fit between the arrest member 56 and the housing 58 means that the forces acting on the arrest member 56 in a direction parallel to the guides 16, 26 have no repercussion on the fixing screws 62.
  • Each arrest member 56 has a front arrest wall 64 orthogonal to the direction of the guides 16, 26.
  • elastomeric damping elements 66 are applied on the front arrest wall 64.
  • Each arrest member 56 is inserted with clearance in a respective elongated seat 68 formed in the side wall 30 of the slide 24.
  • Each elongated groove 68 has a respective front wall 70 that is to co-operate in a relationship of arrest with the front surface 64 of the arrest member 56.
  • the slide 24 is mobile with respect to the top guide unit 12 between a resting position illustrated in Figure 3 and a working position illustrated in Figure 4 .
  • the elastic element 52 tends constantly to push the slide 24 towards the resting position, in the direction indicated by the arrow 54 in Figure 3 .
  • the slide 24 In the resting position, the slide 24 is in contact of arrest against the arrest members 56 via the front surfaces 70 and 64, with interposition of the damping members 66.
  • the slide 24 In the position of die open, the slide 24 is in the resting position. During the movement of closing of the half-dies, the slide 24 is compressed between the guide 16 of the top guide unit 12 and the guide 20 of the bottom guide unit 14. The slide 24 moves from the resting position illustrated in Figure 3 to the working position illustrated in Figure 4 during closing of the half-dies. During this travel from the resting position to the working position, the tool 32 carries out a machining operation on the sheet metal compressed between the half-dies, for example a drilling or a shearing operation.
  • the elastic element 52 brings the slide 24 back into the resting position.
  • the arrest members 56 absorb the force with which the slide 24 is pushed towards the resting position. Said force is discharged on the top guide unit 12 through the side vices 38. However, the force with which the slide 24 impacts against the arrest members 56 does not stress either the fixing screws 62 of the arrest members 56 or the fixing screws 46 of the side vices 38.
  • the fact of providing the arrest members 56 on the side vices 38 enables simplification and lightening of the top guide unit 12 as compared to known solutions in which the arrest element of the slide 24 is provided in the rear part of the top guide unit.
  • the arrangement of the arrest members 56 on the side vices 38 avoids the need for top guide unit 12 to have a shape that envelops the slide 24 in the rear part.
  • the present invention moreover enables simplification of the machining operations to be carried out both on the top guide unit 12 and on the slide 24.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Claims (7)

  1. Luftnockenaufbau für Umformwerkzeuge zum Umformen von Metallblech mit einer oberen Werkzeughälfte und einer unteren Werkzeughälfte, die in einer vertikalen Richtung zwischen einer offenen Position und einer geschlossenen Position zueinander beweglich sind, wobei der Nockenaufbau folgendes aufweist:
    - eine obere Führungseinheit (12), die an der oberen Werkzeughälfte zu befestigen ist und eine erste Führung (16) aufweist;
    - eine untere Führungseinheit (14), die an der unteren Werkzeughälfte zu befestigen ist und eine zweite Führung (20) aufweist;
    - eine Gleiteinrichtung (24), die von der oberen Führungseinheit (12) getragen ist und eine dritte Führung (26), die mit der ersten Führung (16) zusammenarbeitet, und eine vierte Führung (34) aufweist, die mit der zweiten Führung (20) zusammenarbeitet, während eines Schließens der Werkzeughälften, wobei die Gleiteinrichtung (24) zwischen einer Ruheposition und einer Arbeitsposition hinsichtlich der oberen Führungseinheit (12) beweglich ist;
    - ein Paar von seitlichen Einspannbacken (38) zum Verbinden der Gleiteinrichtung (24) mit der oberen Führungseinheit (12) in einer beweglichen Art und Weise, wobei die Einspannbacken (38) seitlich und auf entgegengesetzten Seiten der Gleiteinrichtung (24) eingestellt sind; und
    - eine elastische Einrichtung (52), die zwischen die obere Führungseinheit (12) und die Gleiteinrichtung (24) zum Drücken der Gleiteinrichtung (24) elastisch gegen Fangeinrichtungen (56) in der Ruheposition gesetzt ist,
    dadurch gekennzeichnet, dass die Fangeinrichtungen (56) an den seitlichen Einspannbacken (38) vorgesehen sind.
  2. Luftnockenaufbau nach Anspruch 1, dadurch gekennzeichnet, dass die Fangeinrichtungen (56) an den seitlichen Einspannbacken (38) einstückig oder mittels Schrauben (62) fixiert sind.
  3. Luftnockenaufbau nach Anspruch 1, dadurch gekennzeichnet, dass die Fangeinrichtungen ein Fangbauteil (56) aufweisen, das von einer Bodenwand (60) von jeder seitlichen Einspannbacke (38) vorragt.
  4. Luftnockenaufbau nach Anspruch 3, dadurch gekennzeichnet, dass jedes Fangbauteil (56) mit einem Abstand mit einem entsprechenden länglichen Sitz (68) in Eingriff steht, der an einer entsprechenden Seitenwand (30) der Gleiteinrichtung (24) ausgebildet ist.
  5. Luftnockenaufbau nach Anspruch 4, dadurch gekennzeichnet, dass jedes der Fangbauteile (56) eine vordere Fangfläche (64) aufweist, die einer entsprechenden vorderen Fläche (70) des entsprechenden länglichen Sitzes (68) zugewandt ist, wobei die vorderen Flächen (64, 70) orthogonal zu der ersten und der dritten Führung (16, 26) sind.
  6. Luftnockenaufbau nach Anspruch 3, dadurch gekennzeichnet, dass jedes der Fangbauteile (56) in einem Gehäuse (58) fixiert ist, das in der Bodenwand (60) der entsprechenden Einspannbacke (38) ausgebildet ist.
  7. Luftnockenaufbau nach Anspruch 1, dadurch gekennzeichnet, dass jede der seitlichen Einspannbacken (38) einen im Wesentlichen L-förmigen Vorsprung (40) aufweist, der mit einem entsprechenden L-förmigen Sitz (42) in Eingriff steht, der in einer entsprechenden Seitenwand (44) der oberen Führungseinheit (12) ausgebildet ist.
EP10157721.1A 2009-04-14 2010-03-25 Luftnockenaufbau für Umformwerkzeuge Active EP2241387B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITTO2009A000286A IT1397576B1 (it) 2009-04-14 2009-04-14 Camma aerea per stampi

Publications (2)

Publication Number Publication Date
EP2241387A1 EP2241387A1 (de) 2010-10-20
EP2241387B1 true EP2241387B1 (de) 2014-04-30

Family

ID=41432734

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10157721.1A Active EP2241387B1 (de) 2009-04-14 2010-03-25 Luftnockenaufbau für Umformwerkzeuge

Country Status (2)

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EP (1) EP2241387B1 (de)
IT (1) IT1397576B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102430645B (zh) * 2011-08-26 2016-08-03 奇瑞汽车股份有限公司 一种斜楔模具活块回程机构
IT201900018953A1 (it) 2019-10-16 2021-04-16 O M C R S R L Camma per stampi

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3387207B2 (ja) * 1994-04-25 2003-03-17 オイレス工業株式会社 プレス用カム型
US5884521A (en) * 1998-07-10 1999-03-23 Lamina, Inc. High performance aerial and die mount cams
ES2223331T3 (es) * 2000-03-17 2005-03-01 Sankyo Oilless Industry, Inc. Corredera de leva y unidad de leva que la utiliza.
ATE337165T1 (de) * 2000-10-13 2006-09-15 Harald Weigelt Keiltrieb
DE102005029140B4 (de) * 2005-06-23 2008-04-03 Elke Weigelt Werkzeugbefestigungseinrichtung für einen Keiltrieb
DE102006036654B4 (de) * 2006-08-03 2008-12-04 Harald Weigelt Keiltrieb mit Zwangsrückholeinrichtung

Also Published As

Publication number Publication date
IT1397576B1 (it) 2013-01-16
EP2241387A1 (de) 2010-10-20
ITTO20090286A1 (it) 2010-10-15

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