EP2934853A1 - Procédé et dispositif de fabrication d'un ressort en matériau composite renforcé par des fibres - Google Patents

Procédé et dispositif de fabrication d'un ressort en matériau composite renforcé par des fibres

Info

Publication number
EP2934853A1
EP2934853A1 EP13831893.6A EP13831893A EP2934853A1 EP 2934853 A1 EP2934853 A1 EP 2934853A1 EP 13831893 A EP13831893 A EP 13831893A EP 2934853 A1 EP2934853 A1 EP 2934853A1
Authority
EP
European Patent Office
Prior art keywords
strand
spring
protective
laminate
plastic
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Withdrawn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
EP13831893.6A
Other languages
German (de)
English (en)
Inventor
Werner Hufenbach
Martin Lepper
Jens Werner
Christian KÖHLER
André BARTSCH
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.)
ThyssenKrupp AG
ThyssenKrupp Federn und Stabilisatoren GmbH
Original Assignee
Leichtbau Zentrum Sachsen GmbH
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 Leichtbau Zentrum Sachsen GmbH filed Critical Leichtbau Zentrum Sachsen GmbH
Publication of EP2934853A1 publication Critical patent/EP2934853A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/021—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant characterised by their composition, e.g. comprising materials providing for particular spring properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/02—Bending or folding
    • B29C53/12—Bending or folding helically, e.g. for making springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/024—Covers or coatings therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/04—Wound springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
    • F16F1/366—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers made of fibre-reinforced plastics, i.e. characterised by their special construction from such materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
    • F16F1/366—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers made of fibre-reinforced plastics, i.e. characterised by their special construction from such materials
    • F16F1/3665—Wound springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/774—Springs

Definitions

  • the invention relates to a process for producing an Fe ⁇ the group consisting of in which a formed from fibers of the server Fa ⁇ composite material and impregnated with a matrix material reclaimable Laminatstresti is formed into a spring geometry fiber composite material.
  • the invention relates to a device for performing the method, in particular for producing a spring from Fa ⁇ server composite material with a processing device for generation of a He ⁇ laminate strand formed of fibers and impregnated with a consoli ⁇ cash matrix material.
  • the invention also relates to a spring made of fiber composite ⁇ material.
  • bevels impregnated with matrix material are nested / rovings continuously. twisted into a fiber strand or wound on a flexible, strand-shaped spring core to form a fiber strand or hollow cross-section.
  • Such a method is known from DE 10 2011 018 217 AI ⁇ known.
  • the fibers are not impregnated during the winding process while on ⁇ wear on the spring core several times with a resin, thereby forming a wet, strand-like laminate and the strand-like laminate is subsequently wound on a mold having a geometry and size of the spring corresponding spiral ⁇ nut and consolidates , This aftertreatment to the curing of the spring takes place under the action of heat on the mold.
  • a major disadvantage of the aforementioned method is that both the equipment for the production itself as well as the form ⁇ tools are heavily contaminated by the leaking laminate / Rovingstrang.
  • the contamination of the helical grooves of the molding tools ⁇ lead to sticking of the laminate strand with the molding tool ⁇ and larger, undesired tolerances.
  • there is a high level of cleaning effort which leads to longer downtimes even after short production cycle times and thus does not allow process continuity.
  • the He ⁇ invention the object of providing a method and Vorrich ⁇ processing for producing a spring made of fiber composite material to provide that (s) the disadvantages of the prior art be ⁇ batht and in particular the production process so verbes ⁇ sert that higher production rates can be achieved.
  • the object is further achieved by a Vorrich ⁇ device for performing the method according to the features of claims 14 to 20.
  • a strand-shaped prefabricated product is formed by applying a formable protective jacket enclosing the laminate strand in a continuous application process.
  • the protective jacket on the moldable Lami ⁇ natstrang the subsequent forming process is facilitated compared to the previous methods in advantageous manner ⁇ .
  • the laminate strands impregnated with matrix material are completely enveloped and thus have a closed, smooth and dry surface.
  • the protective sheath is formed by extruding a melt of plastic or metal and continuous casting around the laminate strand.
  • the process enables a continuous coating process to produce a uniform
  • Protective layer around the laminate strands A completely enclose the Laminatstrhack ⁇ the protective jacket is natstrang by the continuous, circumferential casting the extruded melt to the laminating formed with a homogeneous surface.
  • the plastic used is a thermoplastic or a wax.
  • the plastic, dimensionally stable protective jacket has the advantage that the thus formed strand-shaped precursor behaves intrinsically stable during the forming process in the respective spring geometry on the mold and hardly needs to be fixed.
  • the molds for the forming process of the precursor in the respective spring geometry no consuming ⁇ ended guide grooves or grooves need.
  • the winding process of the precursor into the spring geometry can be carried out on a smooth mold ⁇ tool, the shape is maintained without necessary Nachar ⁇ works in high dimensional accuracy.
  • the molded precursor immediately after the winding process before the consolidation (hardening) removed from the forming tool and aftertreated in a separate curing or tempering ⁇ who. This simplifies and accelerates the forming process, he ⁇ höht the utilization of molds and enhances the Ferti ⁇ supply cycle.
  • the dispensability of the guide grooves on the mold ⁇ tool also reduces the cost of manufacturing the mold considerably.
  • the protective sheath can be correspondingly colored, whereby, for example, the recognizability or the distinctness of different laminate strands can be made possible.
  • the sheath is made of plastic for protecting ⁇ coat of metal has a low melting point metal alloy, for example, bismuth, is provided.
  • Ver ⁇ driving is vorgese ⁇ hen as a continuous application process, the protective jacket by a continuous, to form the Lami ⁇ natstrang molding enclosing and sealing a strip ⁇ materials from plastic or metal.
  • a strip material made of metal can be formed directly on it, for example, by continuous sliding of a thin sheet, which is thus adapted to the cross-sectional geometry of the laminate strand
  • the molded around the Laminatstrnature strip material is closed at closing ⁇ along its abutting in the longitudinal extension of Lami ⁇ natstrangs edge regions.
  • the sealing of a strip material made of metal can be effected at ⁇ example by welding by means of a Lasersch welleinrich ⁇ tung or by soldering, whereby the one hand, high stability and on the other hand a high tightness of the protective mantels ⁇ can be achieved.
  • an advantageous rod-shaped precursor having a moldable protective sheath with a closed, smooth and dry surface for further processing.
  • the band material is preferably an easily moldable and plastic material, such as an aluminum, steel or titanium thin sheet, provided with a plastic and formstabi ⁇ ler protective sheath is created with the advantages described above in the further processing of the precursor.
  • the precursor is particularly suitable for ei ⁇ ne cold forming means of a space and cost-saving formula element for the Freiformfederwickeln.
  • the strand-shaped intermediate product produced according to the previously described steps ge ⁇ cut according to an advantageous development of the method in rod sections having a defined length and the ends of rod sections in the composite are sealed with the protective jacket.
  • the ends of the rod sections are dipped to form a respective protective cap in a melt, which is preferably formed from plastic. This immersion process enables fast and reliable sealing of the rod-shaped precursors.
  • the closing of the ends of the sections can take place by plugging Stangenab- fit prefabricated Schutzkap ⁇ pen, which preferably consist of plastic.
  • the sealing or closure of the ends of the Stangenab ⁇ sections, in particular with protective caps according to the aforementioned embodiments, is particularly suitable not only to seal the cut surfaces, but also to close the fiber ends and the edge regions of the protective jacket of the precursor ⁇ and thus the Improve sealing effect.
  • a further embodiment of the method is pre ⁇ see that the protective jacket and / or the protective caps remain after the forming of the intermediate product and the consolidation of the mat ⁇ rixmaterials part of the springs.
  • the advantage of this embodiment is that each correspondingly shaped spring is reliably protected against wear, chipping and other mechanical and chemical Be transferun ⁇ gene and weathering.
  • the spring is preferably suitable for use in a off-road vehicle.
  • the protective jacket and / or the protective caps after forming the precursor, and consolidating the mat ⁇ rixmaterials by the spring to be removed can, for example mechanically, by cutting and Abzie ⁇ hen, or thermally, by melting the respective Ma terials removed.
  • this spring for use preferably in light ⁇ construction, for example in a sports car, is suitable.
  • the laminate strand is formed on a strand-shaped, malleable core element.
  • a moldable core element improves the formability and dimensional stability of the laminate strand for further processing.
  • the quality of the intermediate product in the processing and the quality of the manufactured springs can be influenced with a geziel ⁇ th choice of the moldable core element in the shape, size, Materi al variable and low.
  • the strand-like, malleable core element al auxiliary core is provided and consists of a fusible material ⁇ work, the core member can after curing of the spring ent removed, resulting in no loss to the spring action to a white ⁇ direct saving in weight.
  • the string-shaped, deformable core element is formed from a thermoplastic ⁇ plastic, titanium or aluminum.
  • the core element is formed plastically and dimensionally stable from ⁇ .
  • an apparatus for carrying out the method provides that the processing device is arranged downstream of the laminate strand in the transport direction of the laminate strand, an application unit for forming a protective jacket.
  • the application unit has an extruder with a casting mold surrounding the minatstrang for the continuous discharge and casting of a melt.
  • the application unit comprises a molding device having a enclosing the Laminatstrlind molding die for the continuous molding of a strip material and a joining ⁇ means for continuously sealing the Bandmateri ⁇ than on.
  • a preferred further development of the device provides a means to ⁇ cut to form slugs of the filamentary precursor before, which is arranged downstream of the application unit in the transport direction of the laminate strand.
  • a sealing device for closing the ends of the rod sections ⁇ is provided, which preferably has a dip tank with a melt.
  • An inexpensive embodiment of the device provides for forming the strand-shaped precursor in the spring geometry before a forming tool with a smooth-walled winding core, which is associated with a, preferably heatable, guide element.
  • a space and cost-saving design of the device provides a forming tool with a, preferably be ⁇ heated, mold element for free-form winding of the strand-shaped precursor into the spring geometry.
  • a spring which has a molded in the spring geometry of the spring, strand-like Kernele ⁇ element, a core element surrounding fibrous layer of Fa ⁇ server composite material and the fiber layer enclosing protective casing, the ends of the spring have caps.
  • a spring which has a formed from a fiber layer of a fiber composite, formed in the spring geometry of the spring, elongated hollow profile strand and a hollow profile strand enclosing protective jacket, wherein the ends of the spring have protective caps.
  • the spring according to the invention according to the above statements is in addition to the already mentioned advantages in particular ⁇ special by a low mass, high wear resistance and load capacity.
  • the production process according to the invention in combination with the associated apparatus for carrying out the process compared to the known production methods a Rei ⁇ hey of advantages, which are characterized in particular by a clean spring molding process due to dry Umformwerkzeu- ge, easy handling by dry and protected fancy ⁇ te preliminary products, good storability of the precursors, cost-effective favorable forming tool, better utilization of the molds, increasing the production rate and comprehensive protection of the products thus produced from external mechanical, chemical and weather influences.
  • the invention is in addition to the production of spring products on the production of other products of any size, cross-sections and type transferable.
  • 2, 2a-c is a simplified representation of a first section of a device according to the invention for
  • a simplified sectional view of a two- ⁇ th section of the device according to the invention a sectional view of an intermediate product with protective caps manufactured according to Fig. 3a, an exploded sectional view of Vorpro ⁇ dukts with prefabricated protective caps, a sectional view of the precursor, herge ⁇ presents Fig. 4a, a simplified representation of a third Ab ⁇ section of the device with a mold with winding core, a simplified representation of an alternative mold with a mold element for the free formfederwiekeln, a side view of an inventively Herge ⁇ spring and a sectional view of the spring of FIG. 7a.
  • a first portion of a erfindungsge ⁇ MAESSEN apparatus for manufacturing a spring 34 from Faserver ⁇ composite material according to a first embodiment is Darge ⁇ represents.
  • the first portion of the device comprises a Nasswi ⁇ ckel adopted 1 as a processing device 1 for the manufacture ⁇ development of an impregnated fiber strand (laminated strand) 2, an application unit 15 to form a protective shell 16, egg ⁇ ne conveyor unit 6 for propelling the laminate strand 2 and a cutting device.
  • the processing unit 1 for producing the laminate strand 2 has a take-off unit 3 with a supply roll 4, which is equipped with a flexible, strand-shaped spring core or core element 5 which is continuously conveyed by a conveyor unit 6. borrowed from the supply roll 4 is deducted.
  • the strand-shaped spring core 5 is made in the embodiment of plastic and has a round cross-section.
  • the withdrawn flexible spring core 5 is wetted by means of a first impregnation system 7 with a matrix material 8.
  • processing stations 9 are arranged in series, each consisting of a ring winding system 11 and a impregnation system 7 for impregnation of fibers 10 with
  • Matrix material 8 exist.
  • the respective ring winding system 11 is rotatable about its axis 12 and has a number of kon ⁇ concentrically arranged around the axis 12 Fadenklöppeln 13, of which respective winding threads or fibers 10 are unwound.
  • the fibers 10 are wound on the flexible strand-shaped spring core 5 to a Fa ⁇ serstrang 14 and soaked at the same time, whereby the ge ⁇ impregnated laminate strand 2 is formed as Faserpreform.
  • the application unit of the invention 15 Downstream of the wet-winding device 1 in the transport direction, the application unit of the invention 15 is provided in which the impregnated, wet Laminatstrnature 2 is enclosed with a Schutzman ⁇ tel sixteenth
  • the application unit 15 comprises an extruder 17 for applying a melt 18 made of plastic and the Laminatstrnature 2 closed at ⁇ imaging casting die 19, the circumferentially around the ang intelligentt Laminatstrnature 2 the melt 18th
  • the application unit 24 of Figure 2 comprises, according to the off ⁇ guide according to Figure 1, a molding device 25 for molding egg nes strip material 26 and a joining device 27 for locking the strip material close ⁇ 26th
  • the strip material 26 for example aluminum thin sheet, is provided in a width corresponding to the circumference of the laminate strand 2 on a roll 28. Via a feed, the strip material 26 is pulled together with the laminate strand 2 through a molding matrix 29 enclosing the laminate strand 2.
  • the strip material 26 is continuously, 29 corresponding to the continuously varying cross-sectional shape of the forming die (shown in Fig. 2a to 2c) formed and integrally formed along the Lami ⁇ natstrangs 2 around the latter until the L Lucasskan ⁇ th of the strip material are in contact 26 and the periphery the Lami ⁇ natstrangs 2 close.
  • the strand-shaped pre-product 20 provided with this protective sheath 16 is applied analogously to the first exemplary embodiment via the
  • FIG. 3a shows a sealing device with a dip tank 30, in which a melt 31, for example made of plastic, is located. The ends 23 of the rod sections 22 are immersed in the melt 31, wherein the liquid
  • Plastic envelops the respective ends 23 and after the hardening of the plastic ⁇ protective caps 32 according to the figure 3b forms.
  • FIGS. 5 and 6 each show a third section of the device according to the invention for producing the spring 34, which can be installed separately from the first and second sections of the device.
  • the shaping tool 36 is associated with a guide element 35 for the targeted feeding of the precursor product 20.
  • the molding tool 36 has a smooth-walled, here cylin ⁇ shaped winding core 37 which is rotatably mounted about an axis 38 and means for fixing the ends 23 of the pre-product 20 with thermoplastic protective jacket 16 has.
  • the guide element 35 is mounted vertically ver ⁇ slidable in association with the mold 36 along an axis 39 of the guide member 35.
  • the guide element 35 has a heatable receptacle 40.
  • the thermoplastic protective jacket 16 of the precursor 20 is made moldable by the introduction of temperature in order to be able to transfer the precursor 20 with the flexibility thus achieved into the spring geometry.
  • a helical shape to forming the guide ⁇ element is moved vertically 35 relative to the position of the rotating mold 36, whereby the pitch of the helix is determined by the advancement of the prepro- domestic product by the guide member 35 therethrough.
  • the heated intermediate product is formed around the winding core 37 around, and a spring ge with a defined spring shape forms ⁇ 34th
  • Protective jacket 16 again a dimensionally stable state and can therefore be removed before the consolidation of the winding core 37.
  • the mold 41 comprises a shaped element 42 for free-form winding, by means of which the precursor 20 is transferred with plastic, metallic protective jacket 16 by cold forming directly into the spring geometry.
  • the precursor 20 is pressed with appropriate propulsion ⁇ force against the mold element 42 with a given here, for example quarter-helix, whereby the Vorpro ⁇ dukt 20 20 deformed in a predetermined by the mold member 42 helical shape according to a shape and size of a spring 34 to be formed becomes.
  • Figures 7a and 7b show a spring 34 having a round cross-section ⁇ , which was made of a manufactured according to methods described above and in the associated device 20 with intermediate thermoplastic protective jacket.
  • FIG. 7 a shows the side view of the shaped spring 34, after which it was slightly pulled off the smooth-surfaced winding core 37.
  • springs 34 can be collected together for consolidation in a curing device, not shown ⁇ the.
  • Figure 7b shows the formed spring 34 of Figure 7a in egg ⁇ nem section AA from which the round cross section of the spring core 5, the 5 surrounding the fiber strand 14 and the ther ⁇ moplastische sheath 16 can be seen the spring core. After curing of the spring 34, the spring core 5 from
  • Plastic as needed, for example by a Ausschmelzver ⁇ drive removed.
  • the protective casing left on the spring 34, 16 it may alternatively be used for protection against mechanical or chemical Bean ⁇ spruchung of the spring 34, in particular as a protection against falling rocks or external weather conditions.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Springs (AREA)
  • Moulding By Coating Moulds (AREA)
  • Ropes Or Cables (AREA)

Abstract

Procédé de fabrication d'un ressort en matériau composite renforcé par des fibres, selon lequel un fil laminé formé de fibres du matériau composite renforcé par des fibres et imprégné d'une matière matrice pouvant être durcie est façonné de manière à obtenir la forme d'un ressort. La présente invention concerne également un dispositif permettant la mise en oeuvre dudit procédé. Selon ledit procédé, avant le façonnage du fil laminé(2), un produit semi-fini (20) continu est formé du fait qu'une gaine de protection (16) façonnable entourant le fil laminé (2) est appliquée sur ledit fil lors d'un processus d'application en continu. Selon l'invention, le dispositif comporte une unité d'application (15), située en aval du dispositif de formage (1) dans le sens de transport du fil laminé (2), et destinée à former une gaine de protection (16) autour du fil laminé (2).
EP13831893.6A 2012-12-21 2013-12-06 Procédé et dispositif de fabrication d'un ressort en matériau composite renforcé par des fibres Withdrawn EP2934853A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012112937.1A DE102012112937A1 (de) 2012-12-21 2012-12-21 Vorrichtung und Verfahren zur Herstellung einer Feder aus Faserverbundwerkstoff
PCT/DE2013/100410 WO2014094732A1 (fr) 2012-12-21 2013-12-06 Procédé et dispositif de fabrication d'un ressort en matériau composite renforcé par des fibres

Publications (1)

Publication Number Publication Date
EP2934853A1 true EP2934853A1 (fr) 2015-10-28

Family

ID=50158988

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13831893.6A Withdrawn EP2934853A1 (fr) 2012-12-21 2013-12-06 Procédé et dispositif de fabrication d'un ressort en matériau composite renforcé par des fibres

Country Status (6)

Country Link
US (1) US20150330471A1 (fr)
EP (1) EP2934853A1 (fr)
CN (1) CN105189086B (fr)
BR (1) BR112015014409B1 (fr)
DE (1) DE102012112937A1 (fr)
WO (1) WO2014094732A1 (fr)

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CN106493971B (zh) * 2016-11-30 2019-05-14 上海工程技术大学 碳纤维复合材料螺旋弹簧及其制作方法和成型模具
DE102017215921A1 (de) 2017-09-08 2019-03-14 Basf Se Verfahren zum Herstellen eines gebogenen faserverstärkten Strangprofils
FR3088698A1 (fr) * 2018-11-15 2020-05-22 William Fabre Ressort helicoidal multibrins en materiaux composites.
DE102018129549B9 (de) 2018-11-23 2022-08-18 Action Composites Hightech GmbH Gestaltung der Enden von Schraubenfedern
EP3670156A1 (fr) 2018-12-19 2020-06-24 BASF Polyurethanes GmbH Procédé de fabrication d'un élément durci
CN113320125B (zh) * 2020-02-28 2024-12-17 南京诺尔泰复合材料设备制造有限公司 一种连续纤维复合材料弹簧的制造方法及生产线及弹簧
CN119898012B (zh) * 2025-02-24 2025-10-28 浙江理工大学 热塑性复材扭簧的制备方法及在外骨骼助力装置中的应用

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US20150330471A1 (en) 2015-11-19
CN105189086B (zh) 2020-11-06
DE102012112937A1 (de) 2014-06-26
BR112015014409B1 (pt) 2021-06-08
WO2014094732A1 (fr) 2014-06-26
CN105189086A (zh) 2015-12-23
BR112015014409A2 (pt) 2017-07-11

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