EP4151333A1 - Herstellung von schraubenfedern mit einem rotationsschneider - Google Patents

Herstellung von schraubenfedern mit einem rotationsschneider Download PDF

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Publication number
EP4151333A1
EP4151333A1 EP21197470.4A EP21197470A EP4151333A1 EP 4151333 A1 EP4151333 A1 EP 4151333A1 EP 21197470 A EP21197470 A EP 21197470A EP 4151333 A1 EP4151333 A1 EP 4151333A1
Authority
EP
European Patent Office
Prior art keywords
wire
winding stage
stage
rotary cutter
deformed
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.)
Pending
Application number
EP21197470.4A
Other languages
English (en)
French (fr)
Inventor
Roland Keller
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.)
Spuehl AG
Original Assignee
Spuehl AG
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 Spuehl AG filed Critical Spuehl AG
Priority to EP21197470.4A priority Critical patent/EP4151333A1/de
Priority to CA3225392A priority patent/CA3225392A1/en
Priority to PCT/EP2022/075604 priority patent/WO2023041620A1/en
Publication of EP4151333A1 publication Critical patent/EP4151333A1/de
Pending 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
    • B21F11/00—Cutting wire
    • B21F11/005—Cutting wire springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F23/00—Feeding wire in wire-working machines or apparatus
    • 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
    • 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

Definitions

  • the present invention relates to a mechanism for producing coil springs and to a method of producing coil springs.
  • Mattresses, sofas or other bedding or seating furniture may be provided with innerspring units formed of coil springs.
  • Such coil springs may for example be combined in a wire framework or may be enclosed by fabric to form an assembly of pocket springs.
  • the coil springs are typically wound from steel wire, using automated coil winding machines.
  • EP 3 059 025 A1 describes a spring forming device in which a heated steel wire is continuously fed to a coiling mechanism which deforms the wire to a coil.
  • a cutting mechanism cuts the wire when a given number of coil windings is formed. This cutting is performed without stopping the feeding of the steel wire, using a cutting blade which moves downward towards the steel wire and in a horizontal direction, along with an axial direction of the wire. This movement is achieved by guiding the cutting blade in a reciprocating motion between a top dead center and a bottom dead center.
  • such guided reciprocating motion of the cutting blade may require a rather complex structure of the cutting mechanism.
  • the present invention provides a mechanism according to claim 1, and a method according to claim 13.
  • the dependent claims define further embodiments.
  • an embodiment of the invention provides a mechanism for producing coil springs.
  • the mechanism comprises a winding stage for engaging with a wire and deforming the wire to coil windings as the wire moves through the winding stage. Further, the mechanism comprises a feed mechanism configured to feed the wire to the winding stage. Further, the mechanism comprises a rotary cutter. The rotary cutter is configured to cut the deformed wire into portions forming separate coil springs and a blade which is driven for rotation about a stationary rotation axis. Accordingly, cutting of the wire can be achieved without requiring an excessively complex cutting mechanism.
  • the feed mechanism is configured to maintain a constant speed of feeding the wire while the rotary cutter cuts the deformed wire.
  • the coil springs can thus be formed in an efficient manner, without requiring stoppage or slowing of the feeding speed.
  • the feed mechanism could also be configured to operate in a single-step or intermittent manner.
  • the mechanism further comprises a mandrel for cooperating with the blade to cut the wire.
  • the mandrel may be arranged centrally within the coil spring being formed and thus also act as a guide or support for the coil spring being formed.
  • a position of the mandrel relative to the rotation axis of the blade may be adjustable.
  • a position of the rotary cutter relative to the winding stage may be adjustable. In this way, the mechanism may be adapted to different wire gauges and/or geometries of the wire being formed.
  • the blade comprises a protrusion configured to engage between two coil windings of the deformed wire and separate the two coil windings as the blade rotates. In this way, it can be efficiently ensured that the deformed wire is cut at a desired position, taking into account that at an end portion of the coil spring there may be coil windings in close vicinity.
  • the blade is formed on a terminal surface of a shaft portion driven to rotate about the rotation axis.
  • the blade can thus be formed in a simple and robust manner. A need for a complex drive mechanism can be avoided.
  • the winding stage comprises at least one bending tool, typically two or more bending tools. Such one or more bending tools engage the wire at positions set according to a geometry of the coil springs.
  • the winding stage may then be configured to maintain engagement of the bending tools with the deformed wire while the rotary cutter cuts the deformed wire. In this way, cutting of the wire may be performed while keeping the deformed wire in a well-defined position.
  • the least one bending tool may be driven to move the wire to a position in which the rotary cutter cuts the deformed wire.
  • the at least one bending tool may be driven to move during the process of winding the wire, thereby conveying a desired geometry to the coil spring being produced.
  • the at least one bending tool may be driven to move the deformed wire towards the rotary cutter, so that the wire can be cut at a well-defined position. This movement may at the same time assist in producing the coil spring with more densely arranged coils at its end.
  • the mechanism may further comprise a heating stage configured to heat the wire before feeding into the winding stage. Deformation of the wire may thus be assisted by heating. Due to the constant speed of feeding the wire to the winding stage, the heating of the wire can be controlled in a precise manner.
  • the mechanism may further comprise an output stage for transferring the coil springs from the mechanism.
  • the output stage may comprise a guide element for guiding movement of the deformed wire in the winding stage and towards a transport mechanism.
  • the guide element may for example have V-shaped surfaces for engaging on an outer periphery of the coil spring being formed, so that coil springs of various geometry can be guided in a reliable manner.
  • the transport mechanism may comprises at least one magnetic carrier for engaging with the deformed wire and moving the coil spring from the winding stage.
  • the output stage may be configured to cause engagement of the at least one magnetic carrier with the deformed wire before the deformed wire is cut by the rotary cutter to release the coil spring being produced.
  • the transport mechanism may comprise a two or more of such magnetic carriers, e.g., to engage with different portions of the coil spring.
  • a method for producing coil springs is provided.
  • the method may be implemented by a mechanism according to any one of the above embodiments.
  • the method comprises:
  • a constant speed of feeding the wire to the winding stage may be maintained while cutting the deformed wire.
  • the method may further comprise heating the wire before feeding the wire to the winding stage.
  • the method may further comprise maintaining engagement of bending tools of the winding stage with the deformed wire while the rotary cutter cuts the deformed wire.
  • the method may further comprise guiding movement of the deformed wire in the winding stage and towards a transport mechanism.
  • the transport mechanism may comprises at least one magnetic carrier for engaging with the deformed wire and moving the coil spring from the winding stage.
  • the method may comprise causing engagement of the at least one magnetic carrier with the deformed wire before the deformed wire is cut by the rotary cutter to release the coil spring being produced.
  • Exemplary embodiments of the invention as explained in the following relate to a mechanism for producing coil springs.
  • the mechanism may for example be part of or be used in connection with an assembly machine for innerspring units.
  • innerspring units may be based on coil springs connected in a wire framework or on coil springs enclosed by fabric to form an assembly of pocket springs.
  • Figs. 1A , 1B , 1C , and 2 schematically illustrate a mechanism 100 for producing coil springs 10.
  • Fig. 1A shows a plan view in an x-y plane, which may for example correspond to a vertical plane.
  • Fig. 1B shows a further plan view in an x-y plane, which is offset from the illustration plane of Fig. 1A .
  • Fig. 1C illustrates a plan view in an y-z plane, which is perpendicular to the illustration planes of Figs. 1A and 1B .
  • Fig. 2 shows a perspective view of elements of the mechanism 100.
  • the mechanism 100 includes a winding stage 110, a feeding stage 120, a rotary cutter 130, a heating stage 140, and an output stage 150.
  • the winding stage 110 deforms a wire 20, e.g., steel wire, to coil windings.
  • the winding stage 110 is provided with bending tools 115.
  • the bending tools 115 engage the wire 20 at positions which are set according to the desired geometry of coil springs 10 to be produced by the mechanism 100.
  • the bending tools 115 may be motor-driven or be driven by some other kind of drive mechanism, e.g., by a cam drive, so that the positions of engaging the wire 20 can be controlled in an automated manner.
  • the bending tools 115 may be set and controlled according to a desired curvature of the coil windings and/or according to a desired pitch of the coil windings.
  • Various types of bending tools may be used, e.g., a bending tool in which the wire is engaged between pins or a bending tool in which the wire is engaged in a groove or other type of recess formed on a tip of the bending tool.
  • the mechanism is illustrated as being provided with two bending tools 115, other numbers of bending tools 115 could be used as well. For example, a higher number of bending tools 115 could be used to produce coil springs 10 of more complex geometry.
  • the mechanism 100 is provided with a feeding stage 120.
  • the feeding stage 120 feeds the wire 20 to the winding stage 110.
  • the feeding stage 120 is assumed to be provided with two pairs of driven rollers 125. However, it is noted that utilization of only one pair of driven rollers 125 or utilization of more than two pairs of driven rollers 125 would be possible as well.
  • the wire 20 is engaged between the two rollers 125 of each pair, so that rotation of the rollers 125 pushes the wire 20 into the winding stage 110.
  • a guide element 126 is provided at an interface of the feeding stage 120 to the winding stage 110, so that the winding stage 110 receives the wire 20 in a well-defined position.
  • the feeding stage 120 feeds the wire 20 at constant speed to the winding stage 110, so that the wire 20 is pushed through the winding stage 110, where it is engaged by the bending tools 115 and thus deformed to the coil windings.
  • the mechanism 100 is provided with a rotary cutter 130.
  • the rotary cutter 130 is arranged in the vicinity of the winding stage 110 so that the rotary cutter 130 can cut the wire 20 deformed in the winding stage 110.
  • the rotary cutter 130 is based on a blade 135 which is fixedly mounted on a rotary shaft 136 rotates about a stationary rotation axis 135X.
  • This rotation axis 135X is substantially parallel to the axis of the coil springs 10 being produced, which in the illustrated example corresponds to the z-axis.
  • the rotating blade 135 cooperates with a mandrel 137. As for example illustrated in Fig. 1C , the deformed wire 20 passes between the mandrel 137 and the rotating cutting blade 135.
  • the deformed wire 20 As at a given point compressed between the mandrel 137 and a cutting edge 139 of the blade 135, so that the cutting edge 139 cuts into the deformed wire 20 and a portion of the deformed wire 20 corresponding to a coil spring 10 is sheared off.
  • the rotary cutter 130 may cut the deformed wire 20 while maintaining the constant speed of feeding the wire 20 to the winding stage 110. Further, engagement of the deformed wire 20 with at least one of the bending tools 115 is maintained while the rotary cutter 130 cuts the deformed wire 20.
  • one or more of the bending tools 115 may be motor-driven. In this way, the spatial position at which the bending tool 115 engages the wire 20 can be changed during the winding process to thereby obtain a desired geometry of the coil spring 10 being produced. Further, the bending tool 115 can be driven towards the rotary cutter 130, so that the rotary cutter 130 can cut the wire 20 at a desired position. As can for example be seen from Figs. 1A and 1C , the rotating blade 135 of the rotary cutter 130 may rotate about an axis extending in the z-direction, so that the cutting edge 139 moves along a circular trajectory in the x-y-plane.
  • the bending tool 115 which is closest to the rotary cutter 130 may move along the z-direction, e.g., to vary the pitch of the coil windings. In some cases, the bending tool 115 may also move within the x-y-plane, e.g., to vary the diameter of the coil windings. At the end of the winding process, the bending tool 115 may move the wire 20 towards the rotary cutter 130, so that it intersects with the trajectory of the cutting edge 139. In this way, the wire 20 can be cut at a well-defined position. Further, the movement of the bending tool 115 may help to produce more densely arranged coil windings at the end of the coil spring 10.
  • the speed of rotation of the blade 135 may be set in accordance with the constant speed of feeding the wire 20 to the winding stage 110, so that for feeding a wire portion corresponding to one coil spring 10 there is one revolution of the blade 135.
  • the blade 135 may rotate at constant speed.
  • the position of the rotary cutter 130 can be adjustable.
  • the position of the rotary cutter 130 relative to the bending tools 115 of the winding stage 110 can be adjustable in the x-y-plane and/or along the z-direction.
  • the position of the rotary cutter 130 can be adjusted along the axial direction of the coil springs 10 being produced and/or in a plane perpendicular to this axial direction.
  • the position of the rotation axis 135X of the blade 135 can be adjusted relative to the mandrel 137.
  • the mechanism 100 can be adapted to various geometries of the coil springs 10 being produced.
  • the adjustment may be electronically controlled, so that the adjustment can be accomplished in a reproducible an user-friendly manner.
  • the mechanism 100 may be provided with a heating stage 140.
  • the heating stage 140 may be used to heat the wire 20 before it is fed to the winding stage 110. Accordingly, deformation of the wire 20 in the winding stage 20 may be assisted and controlled by heating the wire 20.
  • the heating stage 140 is provided with a number of heaters 141, e.g., based on injecting electric current via electrodes, which heat the wire 20 due to electrical resistance of the wire 20.
  • other types of heater could be used as alternative or in addition, e.g., inductive heaters.
  • the heating stage 140 is provided with guide elements 142 for guiding the wire 20 through the heating stage 140 while avoiding undesired deformation of the wire.
  • the geometry of the heating stage 140 shown in Fig. 1A is merely exemplary and that other geometries could be used as well, e.g., with a higher or lower number of heaters 141 or with a different arrangement of the heaters 141.
  • the mechanism 100 may also be provided with an output stage 150 which actively transfers the coil springs 10 from the winding stage 110.
  • the output stage 150 includes a transport mechanism 160 which transports the coil springs 10 substantially along an axis of the coil springs 10 being produced.
  • the transport mechanism 160 may for example transport the coil springs towards another component of an innerspring assembly machine, e.g., a pocketing mechanism which inserts the coil springs 10 into pockets of fabric material or an assembly mechanism which connects the coil springs 10 in a wire framework.
  • the transport mechanism 160 includes magnetic carriers 165 which are each driven by a belt drive 161 along a transport direction of the coil springs 10.
  • the magnetic carriers 165 magnetically engage with the coil spring 10 being produced. As illustrated in Fig. 1C , this engagement occurs before the rotary cutter 130 cuts the deformed wire 20 and the coil spring 10 is released from the wire 20 fed to the winding stage 110. In this way, undesired movement of the coil spring 10 being produced can be avoided and the coil spring 10 thus reliably transferred from the winding stage 110.
  • magnetic engagement of the magnetic carriers 165 with the coil spring 10 being produced can occur synchronously with or after the rotary cutter 130 cuts the deformed wire 20 and the coil spring 10 is released from the wire 20 fed to the winding stage 110.
  • the number of the magnetic carriers 165 is two, each being driven by a separate belt drive 161.
  • the magnetic carriers 165 and corresponding belt drives 161 may be arranged to engage different portions of the coil spring 10 being produced, e.g., the two end portions of the coil spring 10 or one end portion and a central portion of the coil spring 10.
  • other numbers of magnetic carriers 165 could be used as well, e.g., only one magnetic carrier.
  • other types of transport mechanism could also be used in the output stage 150, e.g., a transport mechanism based on a magnetic conveyor belt or a transport mechanism based on a non-magnetic carrier.
  • a stop 156 may be provided for stopping movement of the coil springs 10 by the transport mechanism 160. While the transport mechanism 160 transfers the coil spring 10 from the winding stage 110, the next coil spring 10 is already being formed in the winding stage 110.
  • the output stage 150 is provides with a guide element 155.
  • the guide element 155 is formed with V-shaped surfaces for engaging on an outer periphery of the coil spring 10 being produced.
  • the guide element 155 guides movement of the deformed wire 20 coming from the winding stage 110 towards the transport mechanism 160.
  • the position of the guide element 155 relative to the winding stage 110 and to the transport mechanism 160 may be adjustable to allow precise adaptation to different geometries of the coil springs 10 being produced.
  • Fig. does not illustrate elements of the rotary cutter 130 and Figs. 1B and 1C do not illustrate the bending tools 115 of the winding stage 110.
  • Figs. 3A, 3B , and 3C further illustrate an exemplary implementation of the blade 135 of the rotary cutter 130.
  • Fig. 3A shows a perspective view of the blade 135 and the rotary shaft 136 of the blade 135.
  • Fig. 3B shows a plan view of the blade 135, taken in a plane perpendicular to the rotation axis of the blade 135.
  • Fig. 3C shows a sectional view of the rotary shaft 136 and the blade 135, taken along line A-A of Fig. 3B .
  • the blade 135 is formed on a terminal surface of the rotary shaft 136.
  • the rotary shaft 136 and the blade 135 are thus formed as a unitary component. Rotation of the blade 135 about the rotation axis 135X can thus be directly driven by the rotary shaft 136.
  • a protrusion 138 is formed on a peripheral portion of the blade 135. In a radial direction from the rotation axis 135X, the protrusion 138 extends further outward from the cutting edge 139 of the blade 135. During rotation of the blade 135, the protrusion engages between two coil windings of the deformed wire 20 and separate the two coil windings, while the cutting edge 139 cuts the deformed wire 20 in one of these coil windings. This situation is schematically illustrated in Fig. 1C .
  • the rotational speed of the blade 135 when cutting the deformed wire 20 is set in such a way that velocity of the cutting edge 139 exceeds the speed of feeding the wire 20, which in turn defines the velocity of the wire portion being cut.
  • the blade 135 is provided with slanted outer surfaces 135A and 135B. These slanted outer surfaces 135A, 135B may be formed in a thread-like shape. The slanted outer surfaces 135A, 135B may help to avoid that the rotating blade 135 interferes with the coil spring 10 being formed in the winding stage 110. Further, the slanted outer surfaces 135A, 135B may guide the deformed wire 20, so that the coil winding in which cutting is to be performed is reliably brought into contact with the cutting edge 139.
  • Fig. 4 shows a flowchart for schematically illustrating a method of producing coil springs, such as the above-mentioned coil springs 10. The method may for example be performed by the above-mentioned mechanism 130.
  • a wire is feed to a winding stage, e.g., like explained above for the feeding of the wire 20 to the winding stage 110.
  • the wire may be heated or unheated.
  • the feeding of the wire to the winding stage is performed at constant speed.
  • the feeding of the wire to the winding stage could be accomplished in a single-step manner, e.g., by feeding a wire portion corresponding to one coil spring into the winding stage and then stopping the feeding until producing the next coil spring, or in an intermittent manner, e.g., by stopping the feeding of the wire also during production of the coil spring.
  • the wire is engaged in the winding stage to deform the wire to coil windings as the wire moves through the winding stage.
  • the wire can be engaged by one, two, or more bending tools of the winding stage, such as the above-mentioned bending tools 115.
  • One or more of such bending tools may be motor-driven, so that the position of engaging the wire can be changed in the course of the winding process.
  • the deformed wire is cut into portions forming separate coil springs, such as the above-mentioned coil springs 10.
  • the cutting of the wire is performed by a blade rotating about a stationary rotation axis, such as explained for the above-mentioned blade 135 which rotates about rotation axis 135X. While cutting the deformed wire, the constant speed of feeding the wire to the winding stage can be maintained. The cutting of the deformed wire produces a separate portion of the deformed wire 20, corresponding to a single coil spring. When cutting the deformed wire, the engagement of the deformed wire with one or more bending tools of the winding stage may be maintained.
  • the bending tool engaging the wire may be driven to move the wire to a position in which the rotary cutter cuts the deformed wire.
  • such bending tool may be driven to move during the process of winding the wire, thereby conveying a desired geometry to the coil spring being produced.
  • the bending tool may be driven to move the deformed wire towards the rotary cutter, so that the wire can be cut at a well-defined position. This movement may at the same time assist in producing the coil spring with more densely arranged coils at its end.
  • the coil spring produced at step 430 is transferred from the winding stage.
  • a transport mechanism such as the above-mentioned transport mechanism 160.
  • the transport mechanism may use one or more carriers for engaging with a portion of the coil spring and moving the coil spring from the winding stage 110, such as the above-mentioned carriers 165.
  • the one or more carriers may be magnetic or non-magnetic.
  • a guide element may guide movement of the deformed wire in the winding stage and towards the transport mechanism. As for example explained for the above-mentioned guide element 155, the guide element may have V-shaped surfaces for engaging on an outer periphery of the coil spring. Engagement of the one or more carriers with the deformed wire may occur before the deformed wire is cut by the rotating blade.
  • the illustrated mechanism and method may be used to produce various kinds of coil springs, e.g., barrel-shaped coil springs, cylindrically shaped coil springs, or hourglass shaped coil springs.
  • the produced coil springs may have various kinds of geometries, e.g., various coil winding diameters, various pitches, various heights, or the like.
  • the bending tools used in the winding stage may be selected and configured according to the specific type and geometry of coil spring to be produced.
  • the output stage may provide an interface to various other kind of machinery processing or otherwise handling coil springs, e.g., machinery for producing innerspring units.
  • Such innerspring units may consist of pocket springs formed by enclosing the coil springs in fabric material or coil springs connected in an open wire framework.
  • driving of the bending tool to move the wire towards the rotary cutter could also be used in connection with other types of cutter, e.g., a cutter having a blade moving in a reciprocating manner. Accordingly, in the above examples in which the bending tool is driven to move the wire towards the rotary cutter, the rotary cutter could be replaced by a generic cutter.
EP21197470.4A 2021-09-17 2021-09-17 Herstellung von schraubenfedern mit einem rotationsschneider Pending EP4151333A1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP21197470.4A EP4151333A1 (de) 2021-09-17 2021-09-17 Herstellung von schraubenfedern mit einem rotationsschneider
CA3225392A CA3225392A1 (en) 2021-09-17 2022-09-15 Coil spring production with rotary cutter
PCT/EP2022/075604 WO2023041620A1 (en) 2021-09-17 2022-09-15 Coil spring production with rotary cutter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21197470.4A EP4151333A1 (de) 2021-09-17 2021-09-17 Herstellung von schraubenfedern mit einem rotationsschneider

Publications (1)

Publication Number Publication Date
EP4151333A1 true EP4151333A1 (de) 2023-03-22

Family

ID=78085764

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21197470.4A Pending EP4151333A1 (de) 2021-09-17 2021-09-17 Herstellung von schraubenfedern mit einem rotationsschneider

Country Status (3)

Country Link
EP (1) EP4151333A1 (de)
CA (1) CA3225392A1 (de)
WO (1) WO2023041620A1 (de)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2869640A (en) * 1954-04-05 1959-01-20 Stephen A Platt Travelling wire coil cutter
US4986103A (en) * 1990-05-08 1991-01-22 Newcomb Spring Corp. Apparatus for coiling springs with tucked ends
DE4040659C1 (en) * 1990-12-19 1992-02-20 Wafios Maschinenfabrik Gmbh & Co Kg, 7410 Reutlingen, De Metal spring coiling machine - incorporates wire feed, coiling tools and cutter
DE102012204513B3 (de) * 2012-03-21 2013-09-19 Wafios Ag Verfahren und Vorrichtung zur Herstellung von Schraubenfedern durch Federwinden
US8978434B2 (en) * 2008-11-05 2015-03-17 Ressorts Huon Dubois Method and equipment for making a spring
EP3059025A1 (de) 2013-10-18 2016-08-24 NHK Spring Co., Ltd. Federherstellungsvorrichtung und verfahren zur herstellung
US20190168287A1 (en) * 2016-06-02 2019-06-06 Hs Products Ltd Wire shaping apparatus and method of shaping a wire
WO2020138376A1 (ja) * 2018-12-28 2020-07-02 日本発條株式会社 コイリングマシンと、コイルばねの製造方法と、コイルばね

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2869640A (en) * 1954-04-05 1959-01-20 Stephen A Platt Travelling wire coil cutter
US4986103A (en) * 1990-05-08 1991-01-22 Newcomb Spring Corp. Apparatus for coiling springs with tucked ends
DE4040659C1 (en) * 1990-12-19 1992-02-20 Wafios Maschinenfabrik Gmbh & Co Kg, 7410 Reutlingen, De Metal spring coiling machine - incorporates wire feed, coiling tools and cutter
US8978434B2 (en) * 2008-11-05 2015-03-17 Ressorts Huon Dubois Method and equipment for making a spring
DE102012204513B3 (de) * 2012-03-21 2013-09-19 Wafios Ag Verfahren und Vorrichtung zur Herstellung von Schraubenfedern durch Federwinden
EP3059025A1 (de) 2013-10-18 2016-08-24 NHK Spring Co., Ltd. Federherstellungsvorrichtung und verfahren zur herstellung
EP3059025B1 (de) * 2013-10-18 2020-06-10 NHK Spring Co., Ltd. Federherstellungsverfahren
US20190168287A1 (en) * 2016-06-02 2019-06-06 Hs Products Ltd Wire shaping apparatus and method of shaping a wire
WO2020138376A1 (ja) * 2018-12-28 2020-07-02 日本発條株式会社 コイリングマシンと、コイルばねの製造方法と、コイルばね

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Publication number Publication date
WO2023041620A1 (en) 2023-03-23
CA3225392A1 (en) 2023-03-23

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