EP0001240A1 - Machine servant à former des ressorts hélicoidaux - Google Patents

Machine servant à former des ressorts hélicoidaux Download PDF

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Publication number
EP0001240A1
EP0001240A1 EP78100839A EP78100839A EP0001240A1 EP 0001240 A1 EP0001240 A1 EP 0001240A1 EP 78100839 A EP78100839 A EP 78100839A EP 78100839 A EP78100839 A EP 78100839A EP 0001240 A1 EP0001240 A1 EP 0001240A1
Authority
EP
European Patent Office
Prior art keywords
mandrel
spring
rollers
take
head
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Withdrawn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
EP78100839A
Other languages
German (de)
English (en)
Inventor
Jakob Lassche
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.)
Hugo Kern und Liebers & Co Platinen- und Federnfabrik GmbH
Kern & Liebers
Original Assignee
Hugo Kern und Liebers & Co Platinen- und Federnfabrik GmbH
Kern & Liebers
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 Hugo Kern und Liebers & Co Platinen- und Federnfabrik GmbH, Kern & Liebers filed Critical Hugo Kern und Liebers & Co Platinen- und Federnfabrik GmbH
Publication of EP0001240A1 publication Critical patent/EP0001240A1/fr
Withdrawn legal-status Critical Current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
    • 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 invention relates to a device for winding coil springs with a rotationally driven winding mandrel, which has a radial slot at its front end for receiving the spring wire and can be moved axially with increasing length of the wound spring from a retracted initial position into an advanced end position.
  • the object of the invention is to provide a device for winding coil springs in which the length of the coil springs that can be produced is not limited by the length of the mandrel, so that coil springs of any length can be wound.
  • a take-over head is arranged after the end position of the mandrel, in that the take-over head has a guide channel for the wound spring which runs coaxially to the mandrel and at least one roller which is radial under pressure rests against the front end of the mandrel when it is in its end position and can be rotated in a plane containing the mandrel axis, and that the take-over head is synchronous and coaxial with the mandrel! can be driven in rotation.
  • the device according to the invention enables coil springs of any length to be wound in the following manner.
  • the end of the spring wire is inserted into the radial slot at the front end of the mandrel.
  • the mandrel is driven and pulls the spring wire off and winds it into a coil spring.
  • the mandrel shoots forward until it is axially advanced to its full length in its end position.
  • the front end of the mandrel slides into the take-over head.
  • the one or more rollers of the take-over head are now under Dr on the outer circumference of the coil spring and press it radially against the front end of the mandrel. If the beginning of the spring wire is pushed out of the radial slot of the winding mandrel during further winding, the helical spring is still carried along by the rotating mandrel, since the rollers press the spring radially onto the mandrel.
  • rollers Since the rollers are rotatable and the entire take-over head rotates synchronously with the winding mandrel, the rollers press the coil spring against the mandrel, but do not hinder the advancement of the spring in the axial direction on the mandrel.
  • the spring can therefore be wound in any length, with the wound coil spring exiting through the guide channel of the takeover head.
  • the rollers on the one hand can press the coil spring under high pressure against the mandrel and on the other hand d. Do not hinder axial feed of the coil spring relative to the mandrel, it is important that the coil spring slightly rotates the rollers despite the high contact pressure.
  • the circumference of the Ro is expediently provided with teeth, the tooth spacing of which corresponds to the pitch of the spring turns. The teeth thus engage between the individual spring windings, so that Rolls can already be rotated by a low axial feed pressure of the coil spring.
  • the fact that the coil spring is carried on the rotating mandrel is further favored by the property of the coil spring to automatically clamp on the mandrel in the event of a torsion.
  • the coil spring is first held at the front end by the rollers on the mandrel and rotated with the rotating mandrel.
  • a tensile force acts on the spring wire in the opposite direction, since the wire must be pulled off the supply wire bundle by the rotating mandrel.
  • the coil spring extends over the length of the mandrel. twisted in itself. This torsion leads to a narrowing of the cross section of the coil spring and thus to a clamping.
  • Coil spring strands of any length can be produced with the device according to the invention.
  • the length of the coil springs to be produced is thus no longer limited by the length of the winding mandrel.
  • the device according to the invention can also be used advantageously for the production of shorter coil springs, the length of which does not exceed the length of the mandrel, since the short spring lengths can be separated from the continuously produced long spring strand in a subsequent work step. In this way, downtimes of the winding machine are avoided.
  • the device according to the invention can also be used advantageously in the manufacture of helical springs with pretension.
  • the separation of shorter springs from a continuous spring strand has the additional advantage that the pre-tension that is wrapped is also present completely into the ends of the separated spring lengths.
  • the device consists of a machine frame 1 0 , which carries a housing 12 in which a mandrel 14 is mounted.
  • the winding mandrel 14 is mounted in the housing 12 by means of a sliding sleeve 16, so that on the one hand it can rotate about its longitudinal axis and on the other hand it can be axially pushed out of the housing 12.
  • a drive motor 18 sets the sliding sleeve 16 and thus the mandrel 14 in rotation via gearwheels 20 and 22.
  • a handwheel 24 serves to turn the mandrel 14 by hand.
  • the mandrel 14 At its front end protruding from the housing 12, the mandrel 14 has a radial slot 26.
  • This R adi alschlitz 26 serves at the beginning of the winding process the To hold the beginning of the spring wire so that the wire is carried along with the rotation of the mandrel 14.
  • the device As far as the device has been described so far, it corresponds to a conventional winding machine.
  • the mode of operation also corresponds to that of a conventional winding machine.
  • the mandrel 14 At the beginning of the winding process, the mandrel 14 is in its initial position which is completely retracted into the housing 12. Only the receptacle formed by the radial slot 26 protrudes from the housing. The spring wire fed from a supply collar is inserted into the radial slot 26 and a few revolutions of the mandrel 14 with the help of the handwheel 24 cause the wire to be held on the mandrel 14.
  • the mandrel 14 is now set in rotation by means of the motor 18, the spring wire being drawn off from the driven mandrel 14 and wound onto the mandrel 14 to form a helical spring 28. As the length of this helical spring 28 wound on the mandrel increases, the mandrel 14 moves axially out of the housing 12, as shown in FIG. 2.
  • the helical spring is received by a takeover head 30 before the mandrel 14 is in its advanced end position.
  • the takeover head 3o is rotatably mounted in the machine frame 1o by means of a bearing 32.
  • the take-over head 3o is driven by the motor 18 synchronously with the mandrel 14 via a shaft 34 and gear wheels 36 and 38.
  • the takeover head 3o has an inner, axially continuous guide channel 4o.
  • the guide channel 4o coaxial alignment with the mandrel 14 and the rotation of the transfer head 3o takes place around the central axis of this guide channel 4 0th
  • the end of the takeover head 3o facing the mandrel 14 and thus the inlet opening of the guide channel 4o are axially at a short distance from the front end of the mandrel 14 when it is in its advanced end position.
  • a roller 46 is rotatably mounted at the front end of the arm facing the mandrel 14 of this bracket 44.
  • the rollers 46 each rotate in a plane containing the central axis of the mandrel 14 and the take-over head 30.
  • the second arm of the lever 44 facing away from the mandrel 14 has a bore 48 which is directed essentially radially towards the take-over head and which is narrowed towards the take-over head 3o by an inwardly directed collar.
  • a pin 5 which is surrounded by a compression spring 52 is seated.
  • the compression spring 52 is supported at one end on a collar of the pin 5o, which limits the longitudinal movement of the pin. 5o in the bore 48 with the narrowed collar of this bore 48 comes to a stop.
  • the compression spring 52 is supported on a threaded bush 54, which in the End of the bore 48 facing away from the take-over head 30 can be screwed in and receives the pin 50 in an axially displaceable manner in a central bore.
  • the rollers 46 are provided with a toothing 56 on their circumference, tooth shape and tooth spacing of the toothing 56 corresponds to the diameter of the spring wire and the pitch of the helical spring 28.
  • the base of the toothing 56 can therefore grip precisely over the roundness of the wire turns of the spring 28.
  • the rollers 46 are located in front of the end of the take-over head 30 facing the mandrel 14, so that when the mandrel 14 is fully advanced, they overlap the front end of the mandrel and rest on the outer circumference of the mandrel, as can be seen in FIG.
  • the mandrel is slightly tapered.
  • the rollers 46 are pressed outwards and the Lever 44 pivoted.
  • this pivoting of the levers 44 has the result that the pins 5o, which are supported on the outer circumference of the take-over head 3o, are axially displaced in the bores 48 against the force of the compression springs 52.
  • the pressure of the springs 52 thus causes the rollers 46 to be pressed against the coil spring 28 under pressure.
  • the strength of this pressure can be adjusted by means of the threaded bush 54.
  • the rollers 46 press the helical spring 28 radially against the front end of the mandrel 14 and thus prevent the spring 28 from rotating with respect to this front mandrel end. Axial displacement of the helical spring 28 with respect to the mandrel 14 is not prevented by the rollers 46, however, since the rollers can be rotated in this axial direction and the mandrel also tapers conically.
  • the spring strand 28 can therefore be wound as desired over the length of the mandrel 14 and migrates through the guide channel 40, as shown in FIG. 3.
  • the spring strand 28 (cf. FIG. 1) emerging from the end of the guide channel 4o facing away from the mandrel can be divided into sections of coil spring length of any length by means of a downstream spring separating device without the continuous winding process having to be interrupted.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wire Processing (AREA)
EP78100839A 1977-09-27 1978-09-07 Machine servant à former des ressorts hélicoidaux Withdrawn EP0001240A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2743309 1977-09-27
DE2743309A DE2743309C2 (de) 1977-09-27 1977-09-27 Vorrichtung zum Wickeln von Schraubenfedern

Publications (1)

Publication Number Publication Date
EP0001240A1 true EP0001240A1 (fr) 1979-04-04

Family

ID=6019946

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78100839A Withdrawn EP0001240A1 (fr) 1977-09-27 1978-09-07 Machine servant à former des ressorts hélicoidaux

Country Status (5)

Country Link
US (1) US4214466A (fr)
EP (1) EP0001240A1 (fr)
JP (1) JPS5457461A (fr)
DE (1) DE2743309C2 (fr)
IT (1) IT7851058A0 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005050008A1 (de) * 2005-10-11 2007-04-12 Bossert & Kast Gmbh & Co. Kg Vorrichtung und Verfahren zum Wickeln von endlosen Schraubenfedern

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3744640A1 (de) * 1987-12-31 1989-07-13 Hans Maus Verfahren zum wickeln von schraubenfedern
US7796883B2 (en) * 2007-04-09 2010-09-14 Microsoft Corporation Flexible circuit connection
CN114871786B (zh) * 2022-04-13 2024-02-06 浙江三和弹簧有限公司 智能生产弹簧设备及工艺
CN116765286B (zh) * 2023-08-18 2023-11-10 苏州立而达精准弹簧有限公司 一种精密弹簧生产用弹簧绕制设备及精密弹簧生产工艺

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60808C (de) * A. RlBOULET und E. moretton in Lyon, 39 rue de Vendöme Maschine zur ununterbrochenen Herstellung von Drahtspiralen
FR505279A (fr) * 1919-10-22 1920-07-27 Stephane Pichault Pere Ressorts hélicoidaux de très grandes longueurs (non limitées) et machine pour les fabriquer
GB584921A (en) * 1943-02-17 1947-01-27 Spiral Binding Improvements in or relating to the manufacture of helical binders for use in securing in book-form stacks of perforated sheets
DE2234633A1 (de) * 1972-07-14 1974-01-31 Will E C H Fa Vorrichtung zum wickeln von drahtschrauben
GB1438452A (en) * 1973-03-21 1976-06-09 Dayco Corp Helical coil forming machine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE585792C (de) * 1931-02-13 1933-10-09 Hubert Linder Vorrichtung zum Wickeln von Federn
US3468148A (en) * 1964-12-18 1969-09-23 Ichizo Tsurumoto Machines for manufacturing spring washer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60808C (de) * A. RlBOULET und E. moretton in Lyon, 39 rue de Vendöme Maschine zur ununterbrochenen Herstellung von Drahtspiralen
FR505279A (fr) * 1919-10-22 1920-07-27 Stephane Pichault Pere Ressorts hélicoidaux de très grandes longueurs (non limitées) et machine pour les fabriquer
GB584921A (en) * 1943-02-17 1947-01-27 Spiral Binding Improvements in or relating to the manufacture of helical binders for use in securing in book-form stacks of perforated sheets
DE2234633A1 (de) * 1972-07-14 1974-01-31 Will E C H Fa Vorrichtung zum wickeln von drahtschrauben
GB1438452A (en) * 1973-03-21 1976-06-09 Dayco Corp Helical coil forming machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005050008A1 (de) * 2005-10-11 2007-04-12 Bossert & Kast Gmbh & Co. Kg Vorrichtung und Verfahren zum Wickeln von endlosen Schraubenfedern
DE102005050008B4 (de) * 2005-10-11 2007-09-20 Bossert & Kast Gmbh & Co. Kg Vorrichtung und Verfahren zum Wickeln von endlosen Schraubenfedern

Also Published As

Publication number Publication date
JPS5457461A (en) 1979-05-09
DE2743309B1 (de) 1979-01-04
DE2743309C2 (de) 1979-08-30
IT7851058A0 (it) 1978-09-12
US4214466A (en) 1980-07-29

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19810220

RIN1 Information on inventor provided before grant (corrected)

Inventor name: LASSCHE, JAKOB