EP0804978A1 - Machine d'enroulement de ressorts hélicoidaux à enroulement simple ou double - Google Patents

Machine d'enroulement de ressorts hélicoidaux à enroulement simple ou double Download PDF

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Publication number
EP0804978A1
EP0804978A1 EP97830199A EP97830199A EP0804978A1 EP 0804978 A1 EP0804978 A1 EP 0804978A1 EP 97830199 A EP97830199 A EP 97830199A EP 97830199 A EP97830199 A EP 97830199A EP 0804978 A1 EP0804978 A1 EP 0804978A1
Authority
EP
European Patent Office
Prior art keywords
wire
feeding direction
transport unit
machine according
winding tool
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
Application number
EP97830199A
Other languages
German (de)
English (en)
Other versions
EP0804978B1 (fr
Inventor
Hans Kunz
Gabriella Kunz
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.)
OMD OFFICINA MECCANICA DOMASO SpA
Original Assignee
OMD OFFICINA MECCANICA DOMASO 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 OMD OFFICINA MECCANICA DOMASO SpA filed Critical OMD OFFICINA MECCANICA DOMASO SpA
Publication of EP0804978A1 publication Critical patent/EP0804978A1/fr
Application granted granted Critical
Publication of EP0804978B1 publication Critical patent/EP0804978B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F35/00—Making springs from wire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F3/00—Coiling wire into particular forms
    • B21F3/02—Coiling wire into particular forms helically
    • B21F3/04—Coiling wire into particular forms helically externally on a mandrel or the like

Definitions

  • the present invention relates to a twisting or bending machine, which has been specifically designed for making either mono or double winding coil springs.
  • twisters or benders by which the wire material to be used for making the coil spring is pressed against a suitable winding tool, causing the wire material to be progressively deformed so as to form the spring with its conventional coil or helical configuration.
  • the pressing force on the wire as the spring is formed is supplied by a wire carrying or transport unit, substantially comprising a roller assembly including a plurality of rollers entraining the wire material along a wire material feeding direction and causing said wire material to pass through a wire guiding element facing the winding tool.
  • the wire material transport unit in particular, is generally stationary with respect to the spindle supporting the winding tool or it can be displaced along a direction parallel to the wire feeding direction.
  • the aim of the present invention is to overcome the above mentioned problem, by providing a twisting or bending machine which has been specifically designed for making coil springs, which allows to change, depending on requirements, the contact point of the wire material and the winding tool.
  • a main object of the present invention is to provide such a machine which is provided with a very high operating flexibility characteristic.
  • Another object of the present invention is to provide such a machine which is specifically adapted to make different shape coil springs, without requiring the coil spring winding tool to be replaced.
  • Yet another object of the present invention is to provide such a machine which is very reliable and safe in operation.
  • a twisting or bending machine specifically designed for making coil springs, either of a mono or a double winding type, which comprises a wire transport unit, including a roller assembly for entraining the wire along a wire feeding direction.
  • Said wire transport unit is arranged in front of a winding tool, which is adapted to bend said wire, said machine being characterized in that said wire transport unit can he driven, with respect to said winding tool, either in parallel to the wire winding direction as well as transversely of said wire winding direction, in order to cause the contact point of the wire and winding tool to change.
  • the transport or carrying unit 2 comprises an assembly of rollers 4, said rollers 4 being rotatively driven about respective rotary axes and cooperating with one another in order to cause the wire 3 to be driven along a wire driving or feeding direction.
  • the wire transport unit 2 comprises, moreover, a wire guiding element 5 provided with a wire passage, extending parallel to the wire feeding direction, and facing a wire winding tool 6 comprising, in the embodiment shown in figures 1 to 3, a winding spindle or shaft, having a substantially vertical axis, which is rotatively driven about its axis so as to cause the wire 3 to be progressively wound about said shaft or mandrel.
  • a cutting blade 7 is arranged, specifically provided for cutting the wire 3 at the end of a spring making operation.
  • the wire transport unit 2 is supported by the machine base 1 by means of two pairs of cross-guiding element 8, each of which comprises a bottom guiding element 9 extending perpendicular to the wire 3 feeding direction, a middle guiding element 10 and a top guiding element 11 arranged parallel to the wire 3 feeding direction, thereby the wire 3 transport unit can be driven either in a direction parallel to the wire 3 feeding direction or in a direction perpendicular to said wire 3 feeding direction, in a substantially horizontal plane.
  • the driving of the wire transport unit 2 along the guiding elements 8 is obtained, in a direction parallel to the wire 3 feeding direction, for example by a servomotor 12 which, through suitable transmission means, comprising, for example, a belt 13 and a screw-screw nut assembly, drive the transport unit 2.
  • the displacement or driving of the wire transport unit 2 in a direction perpendicular to the wire 3 feeding direction can be obtained, in a like manner, by known driving means which, for simplicity, have not been specifically shown.
  • the wire transport unit 2 instead of being supported by the machine base 1 through cross guiding elements, is pivoted to said machine base by a pivot pin 20, to a vertical axis 20a, i.e. perpendicular to the wire 3 feeding direction in the wire transport unit 2.
  • the driving of the transport unit 2, i.e. the swinging thereof about the axis 20a, with respect to the machine base 1, can be obtained by a servomotor, with a screw or screw-nut transmission, generally indicated by the reference number 21, operating on the transport unit 2 so as to cause the latter to partially turn about the rotary axis 20a.
  • FIGs 2 and 3, as well as figures 5 and 6, clearly illustrates this multiple displacement or driving of the wire transport unit 2 with respect to the wire winding tool, in order to make two springs having opposite winding directions.
  • the mandrel or spindle 30 has the axis 30a extending in a vertical direction and is supported both rotatably about said axis 30a and parallel to said axis 30a, by supporting framework 34.
  • a threaded shaft 35 is arranged, also having a vertical axis, and engaging with a nut screw 36 rigid with a movable block 37 supporting rotatably the spindle 30 so as to allow said spindle to turn about its pivot axis 30a.
  • the threaded shaft 35 can be driven by an electric motor 38 so as to cause the block 37 and, accordingly, the spindle 30, to turn parallel to the pivot axis 30a.
  • the spindle 30 can be rotatively driven about its pivot axis 30a by a gear wheel 41 and 42 transmission assembly, the gear wheels 41 and 42 of which are housed inside the supporting framework 34.
  • the latter is slidably mounted on two guides 43a and 43b which are horizontally arranged and extend perpendicular to the wire 3 feeding direction 33.
  • the driving of the supporting framework 34 and, accordingly, of the spindle or mandrel 30 in a horizontal direction, or the driving of said guide elements 43a and 43b is obtained, in a like manner to that disclosed thereinabove, by means of a threaded shaft 44 engaging in a screw nut rigid with the supporting framework 34.
  • the spindle 30 can be driven both vertically, i.e. in a direction parallel to the pivot axis 30a thereof, and accordingly perpendicular to the wire feeding direction 33, preferably a horizontal direction, and in parallel to the guiding elements 43a and 43b, also horizontally extending, but perpendicular to the wire feeding direction 33 so as to change, depending on requirements, the contact point of the wire being supplied by the wire guiding element 5 and the winding tool 31.
  • the winding tool 31 in particular, is supported by the spindle or mandrel 30 through a tool holder element 45 which, as shown in figure 7, can be turned, in a per se known manner, about the rotary axis thereof, extending parallel to or even coinciding with the wire feeding direction 33.
  • the spindle 5 can be either a fixed type of spindle, or it can turn about its pivot axis, coinciding with the axis of the wire 3 and, moreover, said spindle can also be provided with wire gripping means, for gripping the wire during the rotation thereof, so as to increase the working capabilities of the twisting and bending machine according to the present invention.
  • the used materials, as well as the contingent size and shapes can be any, depending on requirements.
EP97830199A 1996-05-02 1997-04-30 Machine d'enroulement de ressorts hélicoidaux à enroulement simple ou double Expired - Lifetime EP0804978B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT96MI000856A IT1282393B1 (it) 1996-05-02 1996-05-02 Macchina torsionatrice o piegatrice particolarmente studiata per la fabbricazione di molle a torsione semplici e doppie
ITMI960856 1996-05-02

Publications (2)

Publication Number Publication Date
EP0804978A1 true EP0804978A1 (fr) 1997-11-05
EP0804978B1 EP0804978B1 (fr) 2002-10-02

Family

ID=11374179

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97830199A Expired - Lifetime EP0804978B1 (fr) 1996-05-02 1997-04-30 Machine d'enroulement de ressorts hélicoidaux à enroulement simple ou double

Country Status (3)

Country Link
EP (1) EP0804978B1 (fr)
DE (1) DE69715953T2 (fr)
IT (1) IT1282393B1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1637251A1 (fr) * 2004-09-21 2006-03-22 David Wu Unité d'entraînement d'un dispositif de dévidage de fil pour une machine de fabrication de ressorts
CN100353088C (zh) * 2004-09-02 2007-12-05 吴国城 弹簧机线轴传动结构
CN103781570A (zh) * 2011-04-12 2014-05-07 瓦菲奥斯股份公司 用于制造弹簧的方法和弹簧机

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007031514A1 (de) 2007-07-06 2009-01-08 Wafios Ag Drahtverformungsmaschine
CN108372262B (zh) * 2018-03-01 2020-04-03 芜湖市海联机械设备有限公司 一种自动卷簧机

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3472051A (en) * 1967-03-17 1969-10-14 Charles R Bergevin Spring coiling machine
JPS59163044A (ja) * 1983-03-09 1984-09-14 Chuo Spring Co Ltd 熱間コイルばねの製造装置
EP0136554A2 (fr) * 1983-09-01 1985-04-10 Morita Iron Works Co., Ltd. Procédé et appareil pour la fabrication d'un ressort enroulé
DE3912244A1 (de) * 1989-04-14 1990-10-18 Pulzer Biegetechnik Gmbh Vorrichtung zum biegen von stangenfoermigem material bereichsweise in die form einer spirale
DE4447253A1 (de) * 1994-06-30 1996-01-11 Itaya Seisakusho Federherstellungsvorrichtung und Herstellungsverfahren dafür

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3472051A (en) * 1967-03-17 1969-10-14 Charles R Bergevin Spring coiling machine
JPS59163044A (ja) * 1983-03-09 1984-09-14 Chuo Spring Co Ltd 熱間コイルばねの製造装置
EP0136554A2 (fr) * 1983-09-01 1985-04-10 Morita Iron Works Co., Ltd. Procédé et appareil pour la fabrication d'un ressort enroulé
DE3912244A1 (de) * 1989-04-14 1990-10-18 Pulzer Biegetechnik Gmbh Vorrichtung zum biegen von stangenfoermigem material bereichsweise in die form einer spirale
DE4447253A1 (de) * 1994-06-30 1996-01-11 Itaya Seisakusho Federherstellungsvorrichtung und Herstellungsverfahren dafür

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 009, no. 014 (M - 352) 22 January 1985 (1985-01-22) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100353088C (zh) * 2004-09-02 2007-12-05 吴国城 弹簧机线轴传动结构
EP1637251A1 (fr) * 2004-09-21 2006-03-22 David Wu Unité d'entraînement d'un dispositif de dévidage de fil pour une machine de fabrication de ressorts
CN103781570A (zh) * 2011-04-12 2014-05-07 瓦菲奥斯股份公司 用于制造弹簧的方法和弹簧机
US9370817B2 (en) 2011-04-12 2016-06-21 Wafios Ag Method and system for programming the control of a multiaxis forming machine and forming machine

Also Published As

Publication number Publication date
DE69715953T2 (de) 2003-08-14
EP0804978B1 (fr) 2002-10-02
ITMI960856A1 (it) 1997-11-02
IT1282393B1 (it) 1998-03-20
DE69715953D1 (de) 2002-11-07
ITMI960856A0 (fr) 1996-05-02

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