FR2656826A1 - Device for the manufacture of composite leaf springs - Google Patents
Device for the manufacture of composite leaf springs Download PDFInfo
- Publication number
- FR2656826A1 FR2656826A1 FR9000228A FR9000228A FR2656826A1 FR 2656826 A1 FR2656826 A1 FR 2656826A1 FR 9000228 A FR9000228 A FR 9000228A FR 9000228 A FR9000228 A FR 9000228A FR 2656826 A1 FR2656826 A1 FR 2656826A1
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- FR
- France
- Prior art keywords
- lay
- carriage
- mandrel
- mold
- plies
- 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
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 239000002131 composite material Substances 0.000 title claims description 5
- 239000000463 material Substances 0.000 claims abstract description 14
- 239000000835 fiber Substances 0.000 claims description 15
- 238000005520 cutting process Methods 0.000 claims description 9
- 238000000151 deposition Methods 0.000 claims description 9
- 229920005989 resin Polymers 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 8
- 238000004804 winding Methods 0.000 claims description 5
- 238000005056 compaction Methods 0.000 claims description 4
- 230000008021 deposition Effects 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000006116 polymerization reaction Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims 2
- 241000237536 Mytilus edulis Species 0.000 claims 1
- 230000009189 diving Effects 0.000 claims 1
- 235000020638 mussel Nutrition 0.000 claims 1
- 238000003860 storage Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000465 moulding Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- KWGRBVOPPLSCSI-WPRPVWTQSA-N (-)-ephedrine Chemical compound CN[C@@H](C)[C@H](O)C1=CC=CC=C1 KWGRBVOPPLSCSI-WPRPVWTQSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/32—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core on a rotating mould, former or core
-
- 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
- B29C53/80—Component parts, details or accessories; Auxiliary operations
- B29C53/8008—Component parts, details or accessories; Auxiliary operations specially adapted for winding and joining
- B29C53/8016—Storing, feeding or applying winding materials, e.g. reels, thread guides, tensioners
-
- 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
- B29C53/80—Component parts, details or accessories; Auxiliary operations
- B29C53/82—Cores or mandrels
- B29C53/821—Mandrels especially adapted for winding and joining
-
- 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
- B29C53/80—Component parts, details or accessories; Auxiliary operations
- B29C53/82—Cores or mandrels
- B29C53/821—Mandrels especially adapted for winding and joining
- B29C53/828—Arrangements comprising a plurality of cores or mandrels, e.g. to increase production speed
-
- 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
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
- B29C69/001—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore a shaping technique combined with cutting, e.g. in parts or slices combined with rearranging and joining the cut parts
- B29C69/002—Winding
-
- 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/38—Automated lay-up, e.g. using robots, laying filaments according to predetermined patterns
- B29C70/386—Automated tape laying [ATL]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D99/00—Subject matter not provided for in other groups of this subclass
- B29D99/0003—Producing profiled members, e.g. beams
- B29D99/0007—Producing profiled members, e.g. beams having a variable cross-section
-
- 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
- F16F1/368—Leaf springs
-
- 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
- B29C70/545—Perforating, cutting or machining during or after moulding
Abstract
Description
La présente invention est relative å un dispositif de fabrication de lames de ressort ou d'ébauches de lames de ressort en matériaux composites, ces lames de ressort étant destinées notamment aux suspensions de véhicules plus particulièrement de véhicules automobiles. The present invention relates to a device for manufacturing spring blades or blanks of spring blades made of composite materials, these spring blades being intended in particular for suspensions of vehicles more particularly of motor vehicles.
Il existe déjà des procédés et des installations permettant de fabriquer des ressorts en matériaux composites. Il s'agit de procédés dits par votehumide qui consistent à partir de fibres sèches que l'on imprègne de résine en continu et que l'on dépose dans un moule. Le moulage du ressort est réalisé par compression et s'effectue à l'aide d'un moule et d'un contre-inoule. Un tel procédé ne donne pas totalement satisfaction car sa mise en oeuvre est compliquée, coûteuse et elle se traduit par des cadences de travail très limitées. Ces inconvénients résultent essentiellement du fait que le procédé nécessite une imprégnation par la résine des fibres sèches utilisées entraînant des fuites de résine, un encrassement des moules nécessitant des nettoyages fréquents. There are already processes and installations for manufacturing springs from composite materials. These are so-called wet-bulb processes which consist of dry fibers which are continuously impregnated with resin and which are deposited in a mold. The spring molding is carried out by compression and is carried out using a mold and a counter-inoule. Such a method is not entirely satisfactory since its implementation is complicated, costly and it results in very limited work rates. These drawbacks essentially result from the fact that the process requires impregnation with the resin of the dry fibers used, resulting in resin leaks, fouling of the molds requiring frequent cleaning.
La présente invention se propose d'apporter une installation perfectionnée pour la fabrication de lames de ressort ou d'ébauches de lames de ressort en matériaux composites par enrouleinent/drapage de nappes de fibres préimprégnées de résine, notamment de fibres unidirectionnelles imprégnées de résine époxyde, cette installation ne présentant pas les inconvénients des solutions antérieures brièveinent rappelées ci-dessus et permettant d'obtenir des cadences de travail très supérieures, par exemple de l'ordre de deux mille ressorts par
Jour, cadences de production courantes dans l'industrie automobile, tout en assurant la qualité et la répétabilité des pièces obtenues.The present invention proposes to provide an improved installation for the manufacture of spring leaves or spring leaf blanks of composite materials by winding / draping plies of fibers preimpregnated with resin, in particular unidirectional fibers impregnated with epoxy resin, this installation does not have the drawbacks of the previous solutions briefly mentioned above and making it possible to obtain very higher working rates, for example of the order of two thousand springs per
Day, current production rates in the automotive industry, while ensuring the quality and repeatability of the parts obtained.
Le dispositif selon l'invention est essentiellement caractérisé en ce qu'il comprend :
- un porte-mandrins double comportant deux poupées fixes, indépendantes et pilotées en vitesse et en position par la commande numérique du dispositif
- deux mandrins supportés par l'axe dudit porte-mandrins et comportant chacun, sur leur périphérie, une pluralité d'empreintes de moules circulaires, usinées a la forme des lames å obtenir
- un chariot mobile, pouvant être indexé successivement devant chaque mandrin et comportant des têtes de drapage et des dévidoirs des bobines sur lesquelles sont enroulées les nappes de fibres pré-imprégnées
- des moyens de translation longitudinale permettant de déplacer ledit chariot mobile de façon qu'il vienne se positionner alternativement devant chaque mandrin afin de placer une tête de drapage en regard de chaque empreinte de moules lors du cycle de fabrication et
- des moyens de translation transversale, permettant de déplacer ledit chariot mobile selon un mouvement de plongée asservi en vitesse et en position a l'aide d'une commande numérique pour appliquer la tête de drapage contre la nappe de matériaux pré-imprégnés déposée dans l'empreinte de moules correspondante.The device according to the invention is essentially characterized in that it comprises:
- a double mandrel holder comprising two fixed dolls, independent and controlled in speed and position by the digital control of the device
- two mandrels supported by the axis of said mandrel holder and each comprising, on their periphery, a plurality of impressions of circular molds, machined to the shape of the blades to be obtained
- a mobile carriage, which can be indexed successively in front of each mandrel and comprising lay-up heads and reels of the reels on which the sheets of prepreg fibers are wound
- longitudinal translation means making it possible to move said movable carriage so that it comes to position itself alternately in front of each mandrel in order to place a lay-up head opposite each mold imprint during the manufacturing cycle, and
- transverse translation means, making it possible to move said mobile carriage in a plunging movement controlled in speed and in position using a digital control to apply the lay-up head against the sheet of prepreg materials deposited in the 'corresponding mold imprint.
Selon un mode de réalisation préféré du dispositif selon l'invention le chariot mobile est monté sur une table pouvant se déplacer sur un banc mobile selon ledit mouvement de plongée pour éloigner ou rapprocher ledit chariot des mandrins, ce banc mobile pouvant en outre se déplacer selon ledit mouvement de translation longitudinale pour amener le chariot alternativement devant chaque mandrin. According to a preferred embodiment of the device according to the invention, the mobile carriage is mounted on a table which can move on a mobile bench according to said plunging movement to move said carriage or move it away from the mandrels, this mobile bench being able to also move according to said longitudinal translation movement to bring the carriage alternately in front of each mandrel.
Selon une autre caractéristique de l'invention, les dévidoirs de bobines sont montés à l'arrière du chariot mobile et ils comportent : les bobines de nappes de fibres pré-iniprégnées ; les moyens de réglage de la tension des nappes assurant l'asservissement du moteur d'entraînement des bobines et des moyens pour mesurer la tension des nappes. According to another characteristic of the invention, the reels of reels are mounted at the rear of the mobile carriage and they comprise: the reels of pre-absorbed fiber sheets; the means for adjusting the tension of the plies ensuring the control of the motor for driving the coils and means for measuring the tension of the plies.
Selon encore une autre caractéristique de cette invention chaque tête de drapage comprend : des galets d'entraînement des nappes provenant des dévidoirs, entraînés par un système moteur contrôlé par commande numérique pour piloter l'avance de la nappe durant sa dépose dans l'empreinte du moule et après sa coupe; des moyens assurant la coupe des nappes qui sont pilotés par l'automate et un galet de compactage pour appliquer une pression variable sur la nappe durant la dépose de cette dernière dans l'empreinte du moule et pour compacter les différentes couches de nappes qui sont déposées successivement dans les empreintes de moules. La tête de drapage peut encore comporter des moyens de chauffage de la nappe avant dépose et compactage. According to yet another characteristic of this invention, each lay-up head comprises: rollers for driving the sheets coming from the reels, driven by a motor system controlled by digital control to control the advance of the sheet during its deposition in the imprint of the mold and after cutting; means ensuring the cutting of the sheets which are controlled by the automaton and a compacting roller to apply a variable pressure on the sheet during the deposition of the latter in the mold cavity and to compact the different layers of sheets which are deposited successively in the mold imprints. The lay-up head may also include means for heating the sheet before depositing and compacting.
Comme on le comprend le principe à la base du dispositif selon cette invention réside en une combinaison d'un bobinage drapage de fibres préimprégnées de résine associé à un moulage sous presse. As can be understood, the principle underlying the device according to this invention resides in a combination of a lay-up winding of fibers impregnated with resin associated with molding in a press.
Le dispositif selon l'invention peut comporter par ailleurs des moyens permettant de déposer des inserts, par exemple des oeillets métalliques, notamment à mi-couche d'une lame de ressort ou d'une ébauche de lame de ressort, dans des logements prévus à cet effet et dans lesquels la fibre des premières couches a été placée. The device according to the invention may also comprise means making it possible to deposit inserts, for example metal eyelets, in particular at the mid-layer of a spring leaf or a spring leaf blank, in housings provided for this effect and in which the fiber of the first layers has been placed.
D'autres caractéristiques et avantages de la présente invention ressortiront de la description faite ci-après en référence aux dessins annexés qui en illustrent un exemple de réalisation dépourvu de tout caractère limitatif. Other characteristics and advantages of the present invention will emerge from the description given below with reference to the appended drawings which illustrate an embodiment thereof devoid of any limiting character.
Sur les dessins
- la figure 1 est une vue en élévation latérale du dispositif selon l'invention, certains détails de la tête de drapage ayant été omis ou représentés de façon schématique afin de simplifier le dessin
- la figure 2 est une vue en plan de la figure 1 avec arrachements partiels
- la figure 3 est une vue en élévation frontale de la figure i
- la figure 4 est une vue partielle illustrant les détails de réalisation de la tête de drapage et
- les figures 5a à 5e illustrent différents exemples de types de ressorts pouvant être fabriqués par le dispositif selon l'invention.On the drawings
- Figure 1 is a side elevational view of the device according to the invention, certain details of the lay-up head having been omitted or shown schematically in order to simplify the drawing
- Figure 2 is a plan view of Figure 1 with partial cutaway
- Figure 3 is a front elevational view of Figure i
FIG. 4 is a partial view illustrating the details of construction of the lay-up head and
- Figures 5a to 5e illustrate different examples of types of springs that can be manufactured by the device according to the invention.
Ainsi qu'on l'a vu ci-dessus, le dispositif selon la présente invention comporte essentiellement un banc de bobinage/nappage comprenant deux parties essentielles d'une part un porte-mandrins double désigné dans son ensemble par la référence 10 et d'autre part un chariot mobile portant les têtes de drapage ou de nappage désigné par la référence 12. As seen above, the device according to the present invention essentially comprises a winding / lapping bench comprising two essential parts on the one hand a double mandrel holder generally designated by the reference 10 and on the other hand, a mobile carriage carrying the layup or layup heads designated by the reference 12.
Le porte-mandrins 10 comporte deux poupées fixes numérisées respectivement 16 et 16'. Ces poupées indépendantes sont pilotées en vitesse et en position par la commande numérique de l'installation. Le porte-mandrins comporte en outre une lunette double 18. L'ensemble ainsi constitué supporte deux mandrins 20, 20' portés par les axes 22, 22' du porte-mandrins double, chacun de ces mandrins comportant sur sa périphérie une pluralité de moules ou d'empreintes de moules tels que 24, ces empreintes étant circulaires et usinées à la forme des lames de ressort ou d'ébauches de lames de ressort à obtenir. The mandrel holder 10 comprises two fixed dolls digitized 16 and 16 'respectively. These independent dolls are controlled in speed and position by the digital control of the installation. The mandrel holder further comprises a double bezel 18. The assembly thus formed supports two mandrels 20, 20 ′ carried by the axes 22, 22 ′ of the double mandrel carrier, each of these mandrels comprising on its periphery a plurality of molds or mold imprints such as 24, these imprints being circular and machined in the form of spring leaves or blanks of spring leaves to be obtained.
Le chariot mobile 12 est conçu de façon à pouvoir être indexé devant chaque mandrin 20, 20', en venant se placer alternativement devant chacun de ces mandrins durant le cycle de fabrication, l'indexation étant pilotée par l'automate de la machine. The movable carriage 12 is designed so as to be able to be indexed in front of each mandrel 20, 20 ′, coming to be positioned alternately in front of each of these mandrels during the manufacturing cycle, the indexing being controlled by the machine automaton.
Comme on le voit sur la figure 1, le chariot mobile 12 porte les têtes de drapage ou de nappage désignées dans leur ensemble par la référence 26 et ce chariot est monté sur une table 28 pouvant être déplacée transversalement selon un mouvement de plongée suivant l'axe X-X, gr ce à un moteur 30 et un système d'entraînement, par exemple du type pignons-crémaillère assurant le déplacement de la table 28 par rapport å un banc mobile 32. Comme on peut le voir sur la figure 1, le déplacement du banc mobile 28 selon l'axe X-X est guidé par des surfaces latérales de guidage telles que 34.Le banc mobile 32 peut être lui-meme déplacé selon un mouvement de translation longitudinale suivant l'axe Y-Y (figure 2), grace à un moteur d'entraînement 36 et un système par exemple du type pignons-crémaillère assurant le déplacement de ce banc mobile 32 par rapport au bâti fixe 38 du dispositif permettant ainsi l'amenée du chariot mobile 12 alternativement devant chaque mandrin 20, 20' ainsi qu'on le décrira ci-après. As can be seen in FIG. 1, the mobile carriage 12 carries the layering or covering heads designated as a whole by the reference 26 and this carriage is mounted on a table 28 which can be moved transversely according to a plunging movement according to the axis XX, thanks to a motor 30 and a drive system, for example of the rack and pinion type ensuring the movement of the table 28 relative to a mobile bench 32. As can be seen in FIG. 1, the movement of the mobile bench 28 along the axis XX is guided by lateral guide surfaces such as 34. The mobile bench 32 can itself be moved in a longitudinal translational movement along the YY axis (FIG. 2), thanks to a drive motor 36 and a system for example of the rack and pinion type ensuring the movement of this mobile bench 32 relative to the fixed frame 38 of the device thus allowing the mobile carriage 12 to be brought in alternately in front of each mand rin 20, 20 'as will be described below.
La table 28 portant le chariot est donc asservie en vitesse et en position à l'aide d'une commande numérique. The table 28 carrying the carriage is therefore slaved in speed and in position using a digital control.
Dans cet exemple de réalisation qui ne présente aucun caractère limitatif la table 28 comporte quatre têtes de nappage ou drapage telles que 26 et quatre dévidoirs de bobines de nappe de matériaux pré-imprégnés. In this exemplary embodiment which has no limiting character, the table 28 comprises four lay-up or lay-up heads such as 26 and four reels of web coils of prepreg materials.
Les dévidoirs de bobines sont montés à l'arrière du chariot mobile 12 et ils comportent les bobines 40 sur lesquelles sont enroulées les nappes de fibres pré-imprégnées de résine N, ces bobines étant déroulées par l'intermédiaire de moteurs 42, et le film de protection 44 de chaque nappe N étant enroulé a l'aide d'un moteur 46 et stocké sur une bobine telle que 48. Le dispositif comporte par ailleurs un tambour 50 entraîné par un moteur 52 assurant la régulation de la tension de la nappe N, la vitesse des moteurs 42 et 46 étant asservie à celle du moteur 52 du tambour de régulation de tension 50. La tension de la nappe N est contrôlée à l'aide de rouleaux 54. The reels of reels are mounted at the rear of the movable carriage 12 and they comprise the reels 40 on which are wound the sheets of fibers pre-impregnated with N resin, these reels being unwound by means of motors 42, and the film protection 44 of each ply N being wound up using a motor 46 and stored on a reel such as 48. The device also comprises a drum 50 driven by a motor 52 ensuring the regulation of the tension of the ply N , the speed of the motors 42 and 46 being controlled by that of the motor 52 of the tension regulating drum 50. The tension of the ply N is controlled using rollers 54.
Chaque tête de drapage ou de nappage telle que 26 (figure 4) comprend essentiellement des galets de guidage 56, des galets d'entraînement 58 entraînés par un moteur non représenté sur le dessin et dont l'application sur la nappe N peut être réalisée par l'intermédiaire d'un vérin 60 et d'une bielle 62 à l'extrémité de laquelle est placé l'un des galets 58, une cisaille de coupe 64 commandée par un vérin 66 et un galet de compactage 68 venant appliquer la nappe de matériaux pré-imprégnée sur l'empreinte d'un moule du mandrin 20 (ou 20'), la pression d'application du galet 68 étant obtenue à l'aide d'un vérin de compactage 70. Sur la figure 4 on a schématisé en 72 l'ensemble des électrovannes de commande des différents vérins d'entraînement 60, de coupe 66 et de compactage 70. Each lay-up or lay-up head such as 26 (FIG. 4) essentially comprises guide rollers 56, drive rollers 58 driven by a motor not shown in the drawing and the application of which on the ply N can be carried out by by means of a jack 60 and a connecting rod 62 at the end of which is placed one of the rollers 58, a cutting shears 64 controlled by a jack 66 and a compaction roller 68 coming to apply the sheet of materials pre-impregnated on the imprint of a mold of the mandrel 20 (or 20 ′), the pressure of application of the roller 68 being obtained using a compacting cylinder 70. In FIG. 4 is shown diagrammatically at 72 all of the solenoid valves for controlling the various drive jacks 60, for cutting 66 and for compacting 70.
Selon l'invention on peut en outre prévoir des moyens schématisés sur le dessin par la référence 74 permettant de réchauffer la nappe N immédiatement avant sa dépose et son compactage sur le moule du mandrin 20. Ce système de réchauffage 74 peut être un système à rayonnement thermique ou à convection. Dans l'exemple de réalisation représenté sur la figure 4, il s'agit d'un système à convection par air chaud, cet air chaud étant soufflé au travers d'une goulotte de guidage par laquelle passe la nappe N ainsi qu'on le voit sur cette figure. According to the invention, it is also possible to provide means shown diagrammatically in the drawing by the reference 74 making it possible to reheat the sheet N immediately before it is deposited and compacted on the mold of the mandrel 20. This reheating system 74 can be a radiation system thermal or convection. In the embodiment shown in FIG. 4, it is a hot air convection system, this hot air being blown through a guide trough through which the sheet N passes as it is seen in this figure.
Comme on l'a décrit ci-dessus, le chariot mobile 12 comporte autant de têtes de drapage ou de nappage telles que 26 et de dévidoirs de nappes N qu'il existe de moules ou d'empreintes de moules sur chacun des mandrins 20, 20'. As described above, the mobile carriage 12 comprises as many lay-up or lay-up heads such as 26 and of web reels N as there are molds or mold imprints on each of the mandrels 20, 20 '.
Le fonctionnement de ce dispositif est le suivant
- Sous la commande de l'automate de l'installation, le chariot mobile 12 vient se positionner devant le mandrin 20 grace au système d'entraînement 36 selon l'axe Y-Y. Le système d'asservissement commande ensuite l'approche en plongée selon l'axe X-X du chariot mobile 12 de manière que chacune des têtes de drapage telles que 26 vienne se positionner en regard de l'une des empreintes de moules 24 portées par le mandrin 20.The operation of this device is as follows
- Under the control of the installation automaton, the mobile carriage 12 is positioned in front of the mandrel 20 thanks to the drive system 36 along the YY axis. The servo-control system then controls the dive approach along the axis XX of the mobile carriage 12 so that each of the lay-up heads such as 26 comes to be positioned opposite one of the mold cavities 24 carried by the mandrel 20.
La poupée 16 entraîne le mandrin 20 selon un mouvement de rotation dont la vitesse est commandée par l'automate du système et simultanément les têtes de drapage 26 montées à l'avant du chariot mobile 12 déposent et guident les nappes de fibres pré-imprégnées dans les cavités des empreintes de moules, les nappes étant compactées dans les moules grâce aux galets de compactage 68 dont la pression est réglée par les vérins tels que 70. Lorsque chaque tête de drapage 26 a déposé dans le moule correspondant une longueur de nappe pré-imprégnée déterminée en fonction de la forme et de la configuration de la couche de la lame de ressort à obtenir, la nappe est découpée par la cisaille 64 sous l'effet du vérin de cisaillage 66. Cette opération de cisaillage est pilotée par l'automate de l'installation.A l'issue de ce premier cycle de nappage (c'est-à-dire de la confection d'une première couche d'une lame de ressort), la commande numérique de l'installation pilote l'avance de la nappe par les galets d'entraînement 58 (ceux-ci viennent alors s'appliquer de part et d'autre de la nappe sous l'effet des vérins tels que 60 et des bielles telles que 62 comme on le voit sur la figure 4), de manière à amener l'extrémité de la nappe à l'emplacement voulu, dans l'empreinte du moule sur la première couche de nappe préalablement déposée dans ce moule. Ces cycles de dépose de couches successives de nappes de matériaux pré-imprégnées, de longueurs fonction de la forme et de l'épaisseur des lames de ressort à obtenir, se poursuivent jusqu'à l'obtention de lames ou d'ébauches de lames présentant les épaisseurs et les formes désirées.A la fin de ces cycles, le système de découpe 64 sectionne l'extrémité de la dernière nappe. The headstock 16 drives the mandrel 20 in a rotational movement the speed of which is controlled by the system automaton and simultaneously the lay-up heads 26 mounted at the front of the movable carriage 12 deposit and guide the sheets of prepreg fibers in the cavities of the mold cavities, the plies being compacted in the molds by means of the compaction rollers 68 whose pressure is adjusted by the jacks such as 70. When each lay-up head 26 has deposited in the corresponding mold a length of pre-ply impregnated determined according to the shape and configuration of the layer of the spring leaf to be obtained, the ply is cut by the shears 64 under the effect of the shearing cylinder 66. This shearing operation is controlled by the automaton After this first topping cycle (i.e. making a first layer of a spring leaf), the digital control of the installation ote the advance of the ply by the drive rollers 58 (these then come to be applied on either side of the ply under the effect of jacks such as 60 and connecting rods such as 62 as is see in FIG. 4), so as to bring the end of the ply to the desired location, in the mold imprint on the first layer of ply previously deposited in this mold. These deposition cycles of successive layers of plies of prepreg materials, of lengths depending on the shape and thickness of the spring blades to be obtained, continue until blades or blade blanks are obtained having desired thicknesses and shapes. At the end of these cycles, the cutting system 64 cuts the end of the last ply.
Les lames ou ébauches de lames de ressort ainsi obtenues à l'issue de ces cycles répétés d'enroulement drappage sont découpés sur le mandrin 20 par tout moyen approprié par exemple par jet d'eau ou faisceau laser. On sépare ainsi les lames d'un méme moule, ce qui permet leur démoulage puis leur transfert vers un poste de polymérisation sous presse (non représenté sur le dessin), où se termine la réalisation des lames de ressort. The blades or blanks of spring blades thus obtained at the end of these repeated stripping winding cycles are cut out on the mandrel 20 by any suitable means, for example by water jet or laser beam. The blades are thus separated from the same mold, which allows them to be removed from the mold and then transferred to a press polymerization station (not shown in the drawing), where the production of the spring blades ends.
Ensuite, l'automate de l'installation provoque le retrait du chariot mobile 12 selon l'axe X-X pour éloigner les têtes de drapage 26 du mandrin 20, puis un déplacement de ce chariot en translation longitudinale selon l'axe Y-Y, afin d'amener ledit chariot mobile 12 devant le second mandrin 20', les têtes de drapage 26 venant alors se positionner respectivement devant les empreintes correspondantes de moules circulaires 24 qui sont prévues également sur la surface périphérique de ce second mandrin 20'. L'opération peut donc recommencer comme décrit ci-dessus afin de réaliser une seconde série de lames de ressort ou d'ébauches de lames de ressort. Then, the installation automaton causes the movable carriage 12 to be withdrawn along the axis XX in order to move the lay-up heads 26 away from the mandrel 20, then a displacement of this carriage in longitudinal translation along the YY axis, in order to bring said movable carriage 12 in front of the second mandrel 20 ', the lay-up heads 26 then being positioned respectively in front of the corresponding impressions of circular molds 24 which are also provided on the peripheral surface of this second mandrel 20'. The operation can therefore start again as described above in order to produce a second series of spring leaves or spring leaf blanks.
Grâce au dispositif, il est possible d'appliquer une pression variable sur la nappe N durant sa dépose, grace au vérin 70 de chaque galet de compactage 68, cette pression pouvant être combinée à la tension qui est appliquée par chaque dévidoir et qui est sous le contrôle du tambour de régulation 50. On peut ainsi compacter les différentes couches de nappes de matériaux préimprégnés constituant un ressort, tout en chassant l'air entre ces couches. Pour faciliter ce résultat et selon l'état de la résine de la nappe considérée, cette dernière peut être réchauffée avant dépose et compactage grace au système 74 décrit cidessus. Thanks to the device, it is possible to apply a variable pressure on the sheet N during its removal, thanks to the jack 70 of each compaction roller 68, this pressure being able to be combined with the tension which is applied by each reel and which is under control of the regulation drum 50. It is thus possible to compact the various layers of plies of prepreg materials constituting a spring, while expelling the air between these layers. To facilitate this result and according to the state of the resin of the sheet considered, the latter can be reheated before depositing and compacting using the system 74 described above.
Ainsi qu'on l'a vu ci-dessus, la table 28 qui porte les têtes de drapage ou de nappage telles que 26 ainsi que les dévidoirs est asservie en position selon l'axe Y-Y par la commande numérique de l'installation. Il est ainsi possible de suivre l'évolution de la forme de la pièce dans le cas de rayons de courbure non constants, d'épaisseur variable et également dans le cas décrit ciaprès où l'installation est équipée de moyens permettant de poser des inserts aux extrémités des lames de ressort obtenues. As we have seen above, the table 28 which carries the lay-up or lay-up heads such as 26 as well as the reels is controlled in position along the Y-Y axis by the digital control of the installation. It is thus possible to follow the evolution of the shape of the part in the case of non-constant radii of curvature, of variable thickness and also in the case described below where the installation is equipped with means making it possible to place inserts at the ends of the spring leaves obtained.
Selon l'invention, des inserts, notamment des inserts métalliques tels que des oeillets peuvent être déposés, par exemple å mi-couche dans des logements prévus à cet effet et dans lesquels la fibre des premières couches a été placée. According to the invention, inserts, in particular metallic inserts such as eyelets can be deposited, for example at mid-layer in housings provided for this purpose and in which the fiber of the first layers has been placed.
La forme de ces inserts peut être adaptée de façon à tenir compte des efforts locaux et à compenser les distortions locales des fibres des nappes de matériaux pré-imprégnés.The shape of these inserts can be adapted so as to take account of local forces and to compensate for local distortions of the fibers of the sheets of prepreg materials.
Dans cet exemple de réalisation les inserts 78 sont stockés dans un magasin prévu sur le chariot mobile 12 et ils sont prélevés à l'aide d'un manipulateur 80 monté à l'extrémité d'un bras mobile tel que 82 supporté par un portique 84 qui est monté au-dessus du porte-mandrins double. Ce manipulateur 80, placé au-dessus des moules du mandrin considéré (sur les figures 2 et 3, il s'agit du mandrin 20) vient déposer automatiquement les inserts 78 dans leurs logements en combinaison avec une indexation des moules. In this embodiment, the inserts 78 are stored in a store provided on the mobile carriage 12 and they are removed using a manipulator 80 mounted at the end of a mobile arm such as 82 supported by a gantry 84 which is mounted above the double chuck holder. This manipulator 80, placed above the molds of the mandrel under consideration (in FIGS. 2 and 3, it is the mandrel 20) automatically deposits the inserts 78 in their housings in combination with an indexing of the molds.
Sur les figures Sa a Se, on a représenté divers exemples de réalisation d'ébauches de lames ou de lames de ressort pouvant être obtenues grâce à l'invention. In Figures Sa a Se, there are shown various embodiments of blade blanks or spring blades obtainable by the invention.
Sur les figures Sa et 5b on a représenté en plan et en élévation une lame hyperbolique d'épaisseur variable et à section constante
Sur les figures 5c et 5d on a représenté une lame parabolique à section variable et largeur constante, respectivement en plan et en élévation et
Sur la figure Se on a représenté en élévation latérale une lame parabolique d'épaisseur variable munie d'inserts métalliques intégrés a chacune de ses extrémités ;
Comme on le comprend les épaisseurs variables des lames de ressort ainsi représentées sont obtenues en déposant dans les moules des nappes de matériaux pré-imprégnés de longueurs variables et contrôlées grâce au système de découpe 64, 66 et au système d'entraînement piloté 58 décrits ci-dessus en référence à la figure 4.Figures Sa and 5b show in plan and elevation a hyperbolic plate of variable thickness and constant section
FIGS. 5c and 5d show a parabolic blade with variable section and constant width, respectively in plan and in elevation and
In Figure Se is shown in side elevation a parabolic blade of variable thickness provided with metal inserts integrated at each of its ends;
As can be understood, the variable thicknesses of the spring blades thus represented are obtained by depositing in the molds sheets of pre-impregnated materials of variable lengths and controlled by the cutting system 64, 66 and the piloted drive system 58 described here. above with reference to Figure 4.
Il demeure bien entendu que la présente invention n'est pas limitée aux exemples de réalisation décrits ou représentés ici mais qu'elle en englobe toutes les variantes. It remains to be understood that the present invention is not limited to the exemplary embodiments described or shown here but that it encompasses all variants thereof.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9000228A FR2656826B1 (en) | 1990-01-10 | 1990-01-10 | DEVICE FOR MANUFACTURING COMPOSITE SPRING BLADES. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9000228A FR2656826B1 (en) | 1990-01-10 | 1990-01-10 | DEVICE FOR MANUFACTURING COMPOSITE SPRING BLADES. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2656826A1 true FR2656826A1 (en) | 1991-07-12 |
| FR2656826B1 FR2656826B1 (en) | 1995-07-21 |
Family
ID=9392644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9000228A Expired - Fee Related FR2656826B1 (en) | 1990-01-10 | 1990-01-10 | DEVICE FOR MANUFACTURING COMPOSITE SPRING BLADES. |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2656826B1 (en) |
Cited By (9)
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| FR2686080A1 (en) * | 1992-01-14 | 1993-07-16 | Aerospatiale | PROCESS FOR THE HOT CONTACT DEPOSITION OF FIBER COMPOSITE MATERIAL WITH A VITREOUS MATRIX AND DEVICE FOR IMPLEMENTING THE PROCESS. |
| FR2692520A1 (en) * | 1992-06-22 | 1993-12-24 | Mediterranee Const Indle | Composite prodn. form resin pre=impregnated fibre material - applied to a rotatable mandrel from a continuous bobbin and cut to shape on the mandrel to which it is applied by pressure roller, partic. for high performance complex shaped composites |
| EP0637520A2 (en) * | 1993-08-06 | 1995-02-08 | Toyota Jidosha Kabushiki Kaisha | Suspension arm made of fiber reinforced plastic and manufacturing method thereof |
| EP1574319A1 (en) * | 2004-03-09 | 2005-09-14 | Saint-Gobain Vetrotex France S.A. | Winding method for a composite band and apparatus for performing such method |
| WO2010070245A1 (en) * | 2008-12-19 | 2010-06-24 | Hexcel Reinforcements | Head for the application of reinforcing threads on a deposition surface |
| WO2012140355A1 (en) * | 2011-04-13 | 2012-10-18 | Snecma | Machine for winding a fibrous texture onto an impregnation mandrel and use of such a machine for producing a gas turbine casing made of a composite material |
| WO2012140357A1 (en) * | 2011-04-13 | 2012-10-18 | Snecma | Compacting device for a machine for winding a fibrous texture onto an impregnation mandrel |
| CN103717359A (en) * | 2011-08-04 | 2014-04-09 | 斯奈克玛 | Device for use in cutting a layer having a fibrous texture wound onto an impregnation mandrel of a winding machine |
| FR3074081A1 (en) * | 2017-11-29 | 2019-05-31 | Arianegroup Sas | METHOD AND INSTALLATION FOR WINDING A PRE-IMPREGNATED FABRIC BAND ON AN INCLINED SURFACE |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2686080A1 (en) * | 1992-01-14 | 1993-07-16 | Aerospatiale | PROCESS FOR THE HOT CONTACT DEPOSITION OF FIBER COMPOSITE MATERIAL WITH A VITREOUS MATRIX AND DEVICE FOR IMPLEMENTING THE PROCESS. |
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| FR2692520A1 (en) * | 1992-06-22 | 1993-12-24 | Mediterranee Const Indle | Composite prodn. form resin pre=impregnated fibre material - applied to a rotatable mandrel from a continuous bobbin and cut to shape on the mandrel to which it is applied by pressure roller, partic. for high performance complex shaped composites |
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| FR2867415A1 (en) * | 2004-03-09 | 2005-09-16 | Saint Gobain Vetrotex | METHOD FOR WINDING A COMPOSITE RIBBON AND ITS DEVICE FOR IMPLEMENTING THE SAME |
| WO2010070245A1 (en) * | 2008-12-19 | 2010-06-24 | Hexcel Reinforcements | Head for the application of reinforcing threads on a deposition surface |
| FR2940175A1 (en) * | 2008-12-19 | 2010-06-25 | Hexcel Reinforcements | HEAD FOR APPLICATION OF REINFORCING WIRES TO A REMOVAL SURFACE |
| US8438825B2 (en) | 2008-12-19 | 2013-05-14 | Hexcel Reinforcements | Head for the application of reinforcing threads on a deposition surface |
| FR2974026A1 (en) * | 2011-04-13 | 2012-10-19 | Snecma | MACHINE FOR WINDING A FIBROUS TEXTURE ON AN IMPREGNATION CHUCK |
| EP2979852A1 (en) * | 2011-04-13 | 2016-02-03 | SNECMA Services | Compacting device for a machine for winding a fibrous texture onto an impregnation mandrel |
| FR2974027A1 (en) * | 2011-04-13 | 2012-10-19 | Snecma | COMPACTING DEVICE FOR MACHINE FOR WINDING A FIBROUS TEXTURE ON AN IMPREGNATION CHUCK |
| WO2012140355A1 (en) * | 2011-04-13 | 2012-10-18 | Snecma | Machine for winding a fibrous texture onto an impregnation mandrel and use of such a machine for producing a gas turbine casing made of a composite material |
| CN103459129A (en) * | 2011-04-13 | 2013-12-18 | 斯奈克玛 | Compacting device for a machine for winding a fibrous texture onto an impregnation mandrel |
| US9434111B2 (en) | 2011-04-13 | 2016-09-06 | Snecma | Machine for winding a fiber texture onto an impregnation mandrel, and the use of such a machine for making a gas turbine casing out of composite material |
| JP2014514974A (en) * | 2011-04-13 | 2014-06-26 | スネクマ | Machine for winding up the fiber structure on an impregnated mandrel and the use of such a machine for producing a gas turbine casing from a composite material |
| WO2012140357A1 (en) * | 2011-04-13 | 2012-10-18 | Snecma | Compacting device for a machine for winding a fibrous texture onto an impregnation mandrel |
| CN103459129B (en) * | 2011-04-13 | 2016-04-06 | 斯奈克玛 | For fibre structure being wound into the fine and close equipment of the machine in impregnation mandrel |
| US9333729B2 (en) | 2011-04-13 | 2016-05-10 | Snecma | Compacting device for a machine for winding a fibrous texture onto an impregnation mandrel |
| RU2593630C2 (en) * | 2011-04-13 | 2016-08-10 | Снекма | Machine for winding fibrous structure on impregnating mandrel and use of said machine for making gas turbine casing from composite material |
| CN103717359B (en) * | 2011-08-04 | 2016-08-17 | 斯奈克玛 | For cutting the equipment being wound around in the impregnation mandrel of machinery the fiber fabric layer being wound around |
| CN103717359A (en) * | 2011-08-04 | 2014-04-09 | 斯奈克玛 | Device for use in cutting a layer having a fibrous texture wound onto an impregnation mandrel of a winding machine |
| FR3074081A1 (en) * | 2017-11-29 | 2019-05-31 | Arianegroup Sas | METHOD AND INSTALLATION FOR WINDING A PRE-IMPREGNATED FABRIC BAND ON AN INCLINED SURFACE |
| EP3492249A1 (en) * | 2017-11-29 | 2019-06-05 | ArianeGroup SAS | Method and installation for winding a pre-impregnated fabric strip on an inclined surface |
| US11298891B2 (en) | 2017-11-29 | 2022-04-12 | Arianegroup Sas | Method and an installation for winding a pre-impregnated fabric strip onto a sloping surface |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2656826B1 (en) | 1995-07-21 |
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