EP2644714A1 - Kontrolierte Sperrvorrichtung einer Feder und Verfahren zu deren. - Google Patents

Kontrolierte Sperrvorrichtung einer Feder und Verfahren zu deren. Download PDF

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Publication number
EP2644714A1
EP2644714A1 EP13161444.8A EP13161444A EP2644714A1 EP 2644714 A1 EP2644714 A1 EP 2644714A1 EP 13161444 A EP13161444 A EP 13161444A EP 2644714 A1 EP2644714 A1 EP 2644714A1
Authority
EP
European Patent Office
Prior art keywords
spring
support
carriage
turns
compression
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
EP13161444.8A
Other languages
English (en)
French (fr)
Other versions
EP2644714B1 (de
Inventor
Thierry Duquesne
Cyrille Hodin
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.)
Sogefi Suspensions SA
Original Assignee
Allevard Rejna Autosuspensions SA
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 Allevard Rejna Autosuspensions SA filed Critical Allevard Rejna Autosuspensions SA
Publication of EP2644714A1 publication Critical patent/EP2644714A1/de
Application granted granted Critical
Publication of EP2644714B1 publication Critical patent/EP2644714B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B21F9/00—Straining wire
    • 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
    • B21F1/00—Bending wire other than coiling; Straightening wire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F99/00—Subject matter not provided for in other groups of this subclass
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49609—Spring making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53613—Spring applier or remover
    • Y10T29/53622—Helical spring

Definitions

  • the present disclosure relates to a device and method for controlled locking of a coil spring, for controlled locking of a coil spring with a chosen compression length, potentially different from that of the so-called "contiguous turns" state. .
  • Such a device or method may be used to adjust the properties of a spring prior to use when a contiguous compression is not favorable. It can particularly apply to the automotive field, especially for suspensions, watchmaking or tooling, to name just these examples.
  • the springs undergo during their manufacture a blocking operation to deform plastically and thus to modify their physical properties.
  • this plastic deformation makes it possible to raise the elastic limit of the spring thus allowing it to better withstand creep.
  • FIG 7A and 7B compare the same spring respectively before and after a blocking operation according to such a method.
  • FIG 8A and 8B compare the same spring respectively before and after a blocking operation according to such a method.
  • the springs obtained by this method do not plasticize all in the same position which generates geometries sometimes very different so that this process is difficult to reproduce.
  • the present disclosure relates to a controlled coil spring locking device configured to compress said spring and control its geometry during compression, comprising a first support configured to hold the first end of the spring and a second support configured to hold the second end. end of the spring, the first and second supports being configured to move relative to one another. It further comprises at least one intermediate support configured to be interposed between certain turns of the spring during compression.
  • the controlled blocking operation plastically deforms the coil spring and thus modify its physical properties.
  • the supports can compress the spring until the turns are contiguous, either with their neighbors or with the intermediate supports, so that we find a situation similar to the known method of locking contiguous turns but with spacers whose thickness allows to adjust the compression length of the spring.
  • unwanted deformations, lateral in particular are reduced or even eliminated.
  • interspire distances are better controlled and do not fluctuate erratically.
  • by adjusting the thickness of the intermediate supports and taking into account the expected rate of plasticization it is possible to adjust the interspire distances of the final spring.
  • said at least one intermediate support is a truncated ring or truncated disk pallet, which truncation is configured to allow passage of a coil of the spring. This shape makes it possible to follow, and therefore to maintain during the blocking, the turns preceding and following the support over a significant length while leaving a space for the passage of the turn.
  • said truncation corresponds to an angular quarter of 90 °.
  • said pallet is substantially helical so that its geometry substantially follows that of the spring turns with which it is in contact during compression. The contact is thus narrower with the turns during the blocking which ensures a better maintenance. In addition, in this way, by not going against their natural disposition, it avoids distorting the turns in an undesired manner.
  • said pallet is bevelled to similarly adapt its geometry to that of the turns of the spring.
  • two adjacent spacer paddles do not have the same orientation and are preferably shifted by more than 90 ° or less 90 °.
  • the truncation is preferably alternated from one side to the other. In this way, the inter-turn game is better distributed.
  • said at least one intermediate support takes the form of a star having at least three branches in order to cooperate with the spring in at least three points.
  • these branches are angularly arranged in a regular manner.
  • said at least one intermediate support takes the form of a Y whose three branches are arranged at 120 ° from each other.
  • the at least three branches of the support are not contained in the same transverse plane. This allows, in the manner of helical palettes, to follow the geometry of the spring.
  • the at least three branches of the support are coplanar: this configuration is less specific, which allows it to easily adapt to different models of springs.
  • the at least three branches of the support are not coplanar.
  • the at least one support is substantially flexible. This makes it possible to better match the geometry of the spring during compression.
  • the controlled blocking device comprises a plurality of intermediate supports.
  • an intermediate support is placed in each interval for which it is desired to control the inter-turn clearance.
  • the presence of an intermediate support between all the turns ensures a control of the geometry over the entire effective length of the spring.
  • all the turns are not necessarily in contact with a support or a turn, in particular some turns located at the ends of the spring may be free.
  • some supports of the plurality of intermediate supports do not have a thickness equal to that of the other supports in order to impose a pitch, that is to say a distance interspires, variable within the spring.
  • At least one intermediate support has a wedge profile whose thickness variation within the support is adjusted to impose a curvature on the axis of the spring. In this way, it is possible to produce springs whose axis is curved.
  • each intermediate support has the same wedge profile. For example, by interposing several supports whose corner is always identical, one can achieve springs whose axis is C-shaped.
  • the different intermediate supports have different corner profiles. It is thus possible locally to adjust the curvature of the spring axis. For example, by interposing several supports whose corner is first in one direction and then in the opposite direction, one can make the springs whose axis is S-shaped.
  • each intermediate support is mounted on a carriage configured to allow said intermediate support to follow the movement of the turns of the spring during its compression.
  • the carriage can move, on a rail for example, to follow the movement of the spring from the initial position of the support to its position during the compression lock.
  • each carriage cooperates with a cleat configured to define an initial position of the carriage, which cleat is preferably adjustable to adjust the initial position of the carriage. It is thus easy and very fast to return each carriage to its initial position to prepare the device for blocking a new spring.
  • each carriage cooperates with a return spring configured to bias said carriage back to its initial position.
  • the compression device further comprises a frame provided with a bar for each carriage, each carriage comprising a through bore and a stop, said through bore sliding along its respective bar and said stop being configured to cooperate with his respective cleat; each return spring is mounted around its respective bar and bears on one hand on an inner surface of the frame and on the other hand on a side surface of the carriage.
  • the carriage is free and it is the turns of the spring which, when they are moved by the supports, push on the supports to move them.
  • each carriage is driven by drive means. It can for example be a worm gear mechanism, each bar can be provided with a thread and a drive mechanism while one of said through holes of each carriage can be provided with a adapted tapping. It can also be a piston drive mechanism, the cleat for each carriage can be driven by such a piston.
  • the first medium is stationary while the second medium is movable and configured to move toward the first medium during compression.
  • first and second supports are coaxial and face each other, and the second support is moved in a straight line toward the first support so that the compression of the spring is purely axial.
  • the second support can move closer to the first support in a curved path: this is particularly favorable in combination with the wedge-shaped intermediate supports for producing springs whose axis is curved.
  • the controlled locking device further comprises gripping means configured to grip and convey the spring, these gripping means being preferably a gripper.
  • the gripper grasps the spring, preferably already properly oriented, arranges it between the first and second supports so that the intermediate supports fit between the turns of the spring, deviates the time of the compression, then returns to get the final spring and conveys it out of the device.
  • the present disclosure also relates to a method of controlled locking of a coil spring comprising the following steps: providing a coil spring, placing the spring between a first and a second support, compressing the spring by relative displacement of the first and second supports relative to each other, decompression of the spring, and evacuation of the spring thus treated. It further comprises the establishment of at least one intermediate support in certain positions corresponding to some of the spaces extending between the turns of the spring; the spring is compressed until all the turns and said at least one intermediate support are in contact with each other.
  • the compressive force exerted by the supports is limited to that necessary to bring the set of turns and of said at least one intermediate support into contiguous contact: they exert no additional constraint once this position reached.
  • the spring undergoes only the stresses due to its stiffness: the device exerts no other significant force on the spring.
  • the efforts exerted on the intermediate supports are very weak: the supports do not therefore require a specific dimensioning to resist these efforts.
  • the controlled blocking method includes a spring orientation step for providing the spring with a preset orientation. In doing so, the spring is put into place in the device directly in the right position.
  • the step of placing said at least one intermediate support is prior to the step of setting up the spring.
  • the device In its initial position, the device is in place and ready to receive the spring; the device returns to its initial position after the blocking operation completed.
  • the compression of the spring takes place hot, that is to say at a temperature above 150 ° C. Such hot compression allows better creep resistance of the final spring.
  • the compression of the spring takes place cold, that is to say at a temperature below 150 ° C, preferably at room temperature. This mode of implementation is more economical.
  • the spring is locked in compression for a minimum of 0.5 s.
  • the device uses a controlled locking device according to one of the embodiments described above.
  • the FIG 1 is an overview of a first example of a device in its initial state.
  • the FIG 2 is an overview of the device of the FIG 1 in its blocking state.
  • the FIG 3 is an overview of the device of the FIG1 in its final state.
  • the FIG 4 is an overview of a second example of a device.
  • FIG 5 is a diagram illustrating the principle of a third exemplary device.
  • FIG 6A and 6B are schematic views comparing the initial and final states of a spring blocked by a device according to the invention.
  • FIG 7A and 7B are schematic views comparing the initial and final states of a spring locked by a first device of the prior art.
  • FIG 8A and 8B are schematic views comparing the initial and final states of a spring blocked by a second device of the prior art.
  • the FIG 1 represents a first example of a controlled blocking device 1 of a spring 2.
  • This device 1 comprises first 11 and second 12 supports, a frame 20 for the displacement of carriages 30a, 30b on which are mounted pallets 40a, 40b , and a conveyor clamp 50.
  • the device is mainly adapted to locking a spring whose axis is straight.
  • the first and second supports 11, 12 each take the form of a cylinder 13 provided at its end with a transverse disc 14, forming a retaining surface 14a directed towards the inside of the device 1, and a support projection 15, coaxial with the cylinder 13, protruding a few centimeters on the retaining surface 14a.
  • the diameter of the support projection 15 is substantially equal to or slightly less than the inside diameter (i.e. the diameter of the inscribed circle) of the end turns 2e of the spring 2.
  • the diameter of the transverse disc 14, and thus of the retaining surface 14a is approximately equal to the outside diameter (that is to say the diameter of the circumscribed circle) of the spring 2 and in any case greater than the outside diameter of the end turns 2e of the spring 2.
  • the supports 11 and 12 are coaxial and face each other.
  • the first support 11 is fixed while the second support 12 is movable and driven by unrepresented drive means.
  • the first support 11 could be mobile as well.
  • the supports 11 and 12 have an identical diameter.
  • one of the two supports may have a different diameter from the other support 12. This is particularly the case for applications in which the spring 2 does not have a constant body diameter such as for example, the double pigtail spring in which the end turns 2e have diameters which are reduced with respect to diameter of the turns 2s of the body of the spring 2 and which may differ from each other.
  • the frame 20 here supports two carriages 30a, 30b but could support quite similarly one or more than two carriages depending on the length of the spring 2.
  • Two bars 22 are fixed between the rear end posts 21 and before 21 'of the chassis 20.
  • Each carriage 30a, 30b has a sliding block 31 provided with two through holes 32 configured to allow the passage of the two bars 22 of the frame 20: the sliding blocks 31 of the carriages 30 can thus slide along the bars 22 back to front of the frame 20 and vice versa.
  • the trolleys 30 also each comprise a substantially L-shaped base 33.
  • Each base 33 has at one of its ends an anchoring portion 33a through which the base is fixed to its respective sliding block 31, with the aid of screws. example.
  • Each base 33 has at its other end a fixing portion 33b on which is fixed a pallet 40.
  • each base 33 has an offset portion 33c for shifting the pallet 40 of its sliding block 31 respectively in the main direction of the device front / rear 1. In this way, one can bring closer to the palettes 40 without being disturbed by the thickness of the sliding blocks 31 of the carriages 30.
  • the heights of the sliding blocks 31 vary between the carriages 30 and are adjusted to allow the pedestals 33 of the rear carriages 30b to pass at least partially above the pedestals 33 of the front carriages 30a.
  • the frame 20 comprises, for each carriage 30a, 30b, a catch 23a, 23b fixed to the rear upright 21 of the frame 20.
  • This catch 23a, 23b cooperates with an abutment projection 34a, 34b protruding under the sliding block 31 of each carriage 30.
  • These cleats 23a, 23b are adjustable, by a worm or piston mechanism for example, to easily adjust the initial position of the pallets 40.
  • return springs 24 are mounted around each bar 22, on the one hand between the front post 21 'and the front surface of the sliding block 31 of the most anterior carriage 30a, on the other hand between the sliding blocks 31 of each of the carriages 30a, 30b.
  • the trolleys 30a, 30b are permanently pushed backwards, that is to say towards their respective cleat 23a, 23b.
  • the stiffness and empty lengths of the return springs 24 are adjusted so that this remains true even if some of the rear carriages 30b are pressed against their cleat 23b.
  • the pallets 40 each comprise a ring 41 whose 90 ° angular quarter has been truncated. Specifically, the truncation begins vertically at the top of the pallet 40 and ends horizontally on the right side or the left side of the pallet 40. Here, the side of the truncation alternates between the successive pallets 40.
  • the ring 41 is slightly helical so that its upper end 41S is not in the same transverse plane as its lateral end 41L: the ring 41 thus substantially follows the helix of the spring 2 during the blocking.
  • the upper 41S and lateral 41L ends may be slightly beveled so as not to present a sharp edge likely to mark or damage the spring 2.
  • the pallets 40 each have a foot 42 for attaching the pallet 40 to the attachment portion 33b of the base 33 of its respective carriage 30.
  • FIG 1, 2 and 3 representing the device 1 respectively before the blocking, during the blocking and after the blocking.
  • springs 2 are provided so that the conveyor clamp 50 can take them.
  • the arrangement of the springs 2 thus provided, and in particular their angular orientation, is set upstream so that the clamp 50 can easily grasp them and put them in place in the device 1 directly in the proper position.
  • each end turn 2e of the spring 2 is then locked, on the one hand, by the support projection 15 which engages inside the the end turn 2e and the block radially and, secondly, by the retaining surface 14a which blocks axially.
  • the second support 12 may optionally perform a maneuver, advancing a few centimeters for example, to facilitate and then lock the engagement of the support projections 15 within the end turns 2e of the spring 2.
  • the compression can then begin: the second support 12 approaches for this purpose the first support 11, here in a straight line, to compress the spring 2.
  • the turns 2s approach each other on the one hand, and the first support 11 remained fixed on the other hand.
  • the turns 2s then drive in their movement the pallets 40 which, thanks to their carriages 30 sliding on the bars 22 of the frame 20, also approach the first support 11.
  • the second support 12 compresses the spring 2 until the turns 2s are all contiguous, either with each other or with some of the pallets 40. Once this joined state is reached, represented in FIG. FIG 2 , the second support 12 stops without compressing further the spring 2 to not load the pallets 40. This blocking state is maintained approximately 1 second.
  • the second support 12 then retreats to resume its initial rest position and thus relax the spring 2.
  • the pallets 40 thus released, are pushed, via the return springs 24 and the carriages 30, to their initial positions defined by the adjustable cleats 23a, 23b.
  • the clamp 50 then grips the final spring 2 'to convey it downstream of the device 1. This state is represented in FIG. FIG 3 . Another clip 50 or the same clamp 50 will then seek a new spring 2 and the cycle starts again. The duration of such a cycle does not exceed more than about 5 seconds.
  • the device 1 may further comprise heating means for imposing a certain temperature within the device 1, the temperature at which the blocking is conducted which can affect the mechanical properties of the final spring 2 '.
  • FIG 6A and 6B represent respectively the initial spring 2 and the final spring 2 '. Thanks to this height-controlled locking, the final spring 2 'has undergone a certain plasticization which has raised its elastic limit and has lost only a little of its initial length (to be compared with the final spring 3' of the prior art to joined turns represented at the FIG 7B ). In addition, thanks to the pallets 40 which made it possible to control the geometry of the spring 2 during the blocking, the final spring 2 'is not deformed laterally and maintains a regular interspire distance (to be compared with the final spring 4' of the height controlled prior art without a pallet shown in FIG. FIG 8B ).
  • FIG 4 represents a second example of device 100 quite similar to the device 1 of the first example except that the pallets 40 have been replaced by supports 140 in the form of Y. These supports therefore comprise three branches 141a, 141b, 141c arranged at 120 ° from each other. The end of the vertical leg 141a is extended by a foot 142 which is fixed in the fixing portion 133b of the base 133 of the carriage 130 associated. In this example, the supports 140 thus cooperate with the turns of the spring 2 only at three points, which is sufficient to control the geometry of the spring 2.
  • FIG 5 schematically represents the principle of a third example of device 200 quite similar to devices 1 and 100 of the first two examples, except that the pallets 240 (it could also be Y-shaped supports) have a wedge-shaped profile, the thickness of the pallet 240 being greater at its top than at its base.
  • three wedge 240 palettes are used: allow to deform the spring transversely differential manner to impose a curvature on the axis A of the spring 202.
  • we obtain a curved spring C-shaped but it is possible to imagine other configuration to impose a more complicated curvature, in particular S.
  • the spring may be already curved initially or may be initially straight and become curved as a result of the blockage.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Springs (AREA)
  • Wire Processing (AREA)
EP13161444.8A 2012-03-30 2013-03-27 Kontrolierte Sperrvorrichtung einer Feder und Verfahren zu deren. Active EP2644714B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1252958A FR2988792B1 (fr) 2012-03-30 2012-03-30 Dispositif et procede de blocage a hauteur controlee d'un ressort

Publications (2)

Publication Number Publication Date
EP2644714A1 true EP2644714A1 (de) 2013-10-02
EP2644714B1 EP2644714B1 (de) 2015-02-18

Family

ID=47915131

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13161444.8A Active EP2644714B1 (de) 2012-03-30 2013-03-27 Kontrolierte Sperrvorrichtung einer Feder und Verfahren zu deren.

Country Status (5)

Country Link
US (1) US9339863B2 (de)
EP (1) EP2644714B1 (de)
JP (1) JP6196056B2 (de)
KR (1) KR102060201B1 (de)
FR (1) FR2988792B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101684904B1 (ko) * 2015-10-13 2016-12-12 한국기계연구원 저항재료가 코팅된 형상기억합금 스프링 및 그 제작방법
JP6113891B1 (ja) * 2016-05-25 2017-04-12 株式会社システムテクニカ アーク状コイルスプリングの製造方法及び製造装置
KR102016914B1 (ko) * 2018-09-04 2019-09-02 대원강업주식회사 저항가열을 이용한 자동차 현가장치 코일스프링의 핫세팅용 지그

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0404674A1 (de) * 1989-06-20 1990-12-27 Allevard Industries Verfahren und Vorrichtung zur Verbesserung der Dauerfestigkeit einer zusammengedrückten Schraubenfeder und durch dieses Verfahren hergestellte Feder
DE19751215C1 (de) * 1997-11-19 1998-12-10 Porsche Ag Vorrichtung zum Blockieren einer Feder in einem Federbein
US20040183243A1 (en) * 2003-03-20 2004-09-23 Yen-Ming Chen Spring enhancer
US20100283193A1 (en) * 2008-08-05 2010-11-11 Chia Hao Huang Clamp of Anti-Vibration Spring

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US2218864A (en) * 1938-06-23 1940-10-22 Charles A Widgren Means for forming and tempering helical springs
US3256594A (en) * 1964-07-10 1966-06-21 Eugene C Howard Spring compressing tool
US3814382A (en) * 1972-01-19 1974-06-04 Applied Power Ind Inc Spring compressor
US3764107A (en) * 1972-05-15 1973-10-09 Gen Motors Corp Spring handling apparatus
US3866896A (en) * 1973-04-02 1975-02-18 Crawford Howard E Resilient coil spring adjuster and method of fabrication
US4036473A (en) * 1975-02-07 1977-07-19 Kenneth Donald Kloster Spring compressor tool
DE2813381C2 (de) * 1978-03-28 1982-12-30 Horst 7730 Villingen-Schwenningen Klann Druckfedernspanner
US5031294A (en) * 1990-05-03 1991-07-16 Branick Industries, Inc. Strut spring compressor
JP2852114B2 (ja) * 1990-09-14 1999-01-27 日本発条株式会社 コイルばねのセッチング装置
JPH0739015B2 (ja) * 1990-12-27 1995-05-01 日本発条株式会社 コイルばねのセッチング装置とセッチング方法
DE19631524C1 (de) * 1996-08-03 1997-11-27 Angelika Weishaar Konsolfederspanner
JP2005048902A (ja) * 2003-07-30 2005-02-24 Nippon Valqua Ind Ltd 成形ベローズの製造方法、および該方法により得られた成形ベローズ
JP2006142316A (ja) * 2004-11-16 2006-06-08 Showa Corp コイルばねのセッチング装置
US7814629B2 (en) * 2007-07-11 2010-10-19 Ismet Uzun Strut spring compression apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0404674A1 (de) * 1989-06-20 1990-12-27 Allevard Industries Verfahren und Vorrichtung zur Verbesserung der Dauerfestigkeit einer zusammengedrückten Schraubenfeder und durch dieses Verfahren hergestellte Feder
DE19751215C1 (de) * 1997-11-19 1998-12-10 Porsche Ag Vorrichtung zum Blockieren einer Feder in einem Federbein
US20040183243A1 (en) * 2003-03-20 2004-09-23 Yen-Ming Chen Spring enhancer
US20100283193A1 (en) * 2008-08-05 2010-11-11 Chia Hao Huang Clamp of Anti-Vibration Spring

Also Published As

Publication number Publication date
FR2988792B1 (fr) 2015-02-27
EP2644714B1 (de) 2015-02-18
KR20130111460A (ko) 2013-10-10
US9339863B2 (en) 2016-05-17
KR102060201B1 (ko) 2019-12-27
FR2988792A1 (fr) 2013-10-04
JP2013223883A (ja) 2013-10-31
US20130255082A1 (en) 2013-10-03
JP6196056B2 (ja) 2017-09-13

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