FR2532239A1 - Method for automatically deflashing parts made from polyester prepreg. - Google Patents
Method for automatically deflashing parts made from polyester prepreg. Download PDFInfo
- Publication number
- FR2532239A1 FR2532239A1 FR8214769A FR8214769A FR2532239A1 FR 2532239 A1 FR2532239 A1 FR 2532239A1 FR 8214769 A FR8214769 A FR 8214769A FR 8214769 A FR8214769 A FR 8214769A FR 2532239 A1 FR2532239 A1 FR 2532239A1
- Authority
- FR
- France
- Prior art keywords
- burr
- flexible
- deburring
- dies
- parts made
- 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
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
- B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
- B29C37/02—Deburring or deflashing
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
Description
Procédé d'ébavurage automatique de pièces en préimprégné polyester.Automatic deburring process for parts in polyester prepreg.
La présente invention se rapporte à ltébavurage de pièces, notamment en matière synthétique renforcée du type préimprégné de polyester, moulées par injection ou par compression. The present invention relates to the deburring of parts, in particular of reinforced synthetic material of the polyester prepreg type, injection or compression molded.
L'introduction de pièces en matières synthétiques de plus en plus nombreuses, notamment dans l'industrie automobile, pose enparticulier le problème de l'élimination de la bavure résiduelle se formant à la périphérie des pièces traitées sous presse. On peut ainsi procéder par - Ebavurage manuel
A l'aide d'un couteau, l'opérateur enlève la bavure en décri
vant le contour de la pièce, puis abat l'arête tranchante ainsi
obtenue par un brossage au tampon de paille plastique.The introduction of more and more plastic parts, in particular in the automobile industry, poses in particular the problem of eliminating the residual burr forming on the periphery of the parts treated under press. This can be done by - Manual deburring
Using a knife, the operator removes the burr in detail
the outline of the workpiece, then cuts down the cutting edge as well
obtained by brushing with a plastic straw pad.
Cette technique est utilisable tant que la cadence de fabrica
tion permet d'effectuer leopération en temps masqué.This technique can be used as long as the production rate
tion allows the operation to be carried out in masked time.
- Ebavurage par suivi automatique du contour de la pièce
On fait suivre le contour à ébavurer par un reproducteur à
partir d'une forme modèle, un reproducteur à commande numérique,
un robot.- Deburring by automatic tracking of the workpiece contour
We follow the contour to be deburred by a reproducer
from a model form, a numerically controlled reproducer,
a robot.
L'outil qui enlève la bavure peut être : une fraise, une meule,
une brosse métallique ou plastique, un jet d'eau, un faisceau
laser.The tool that removes the burr can be: a bur, a grinding wheel,
a metal or plastic brush, a jet of water, a beam
laser.
Ces techniques sont intéressantes mais la vitesse de déplace
ment de l'outil est assez lente et ne permet pas d'absorber les
défauts géométriques des pièces sauf dans le cas d'utilisation de
brosses ou d'un robot muni d'un système de reconnaissance de formes. These techniques are interesting but the speed of movement
the tool is quite slow and does not absorb the
geometric defects of the parts except in the case of use of
brushes or a robot with a shape recognition system.
- Ebavurage par projection de grenaille
Le principe en est le même que pour le grenaillage des pièces
métalliques, les machines utilisées sont semblables (type cabine
ou tunnel).- Deburring by shot projection
The principle is the same as for the shot peening of parts
metallic, the machines used are similar (cabin type
or tunnel).
Dans le cas de pièces en stratifié polyester, cependant la
surface des pièces doit être protégée car on risque de détério
rer la pièce lors de l'ébavurageo
Lorsque la bavure est épaisse, cette technique ne donne pas
toujours de bons résultats. Le procédé est très lourd à mettre
en oeuvre (protection de l'environnement contre le bruit, la
poussière, séparation de la grenaille et des déchets, recyclage
de la grenaille, etc.).In the case of polyester laminate parts, however the
surface of the parts must be protected because there is a risk of deterioration
rer the part when deburring
When the burr is thick, this technique does not give
always good results. The process is very heavy to put
implemented (environmental protection against noise,
dust, separation of shot and waste, recycling
shot, etc.).
Selon l'invention, on pallie les inconvénients ci-dessus en utilisant une matrice souple pour découper la bavure, la pièce elle-même servant de poinçon. According to the invention, the above drawbacks are overcome by using a flexible die to cut out the burr, the part itself serving as a punch.
L'invention sera maintenant décrite au regard des figures i à 3 qui décrivent à titre d'exemple non limitatif respectivement - la figure la et lb, un schéma en coupe montrant la pièce à éba
vurer et la matrice souple avant et après l'opération d'ébavu
rage - la figure 2, un schéma en coupe d'une réalisation pratique - la figure 3, une vue en perspective d'une machine mettant en
oeuvre l'invention.The invention will now be described with reference to Figures i to 3 which describe by way of nonlimiting example respectively - Figure la and lb, a sectional diagram showing the part to éba
vurer and the flexible matrix before and after the deburring operation
rabies - Figure 2, a sectional diagram of a practical embodiment - Figure 3, a perspective view of a machine using
works the invention.
Le procédé d'ébavurage selon l'invention est illustré quant à son principe aux figures la et lb. The deburring process according to the invention is illustrated in principle in Figures la and lb.
La pièce à ébavurer 1, comportant une bavure 2 à éliminer est pressée sur une matrice souple 3 dans laquelle elle pénètre. Ce faisant, la résistance de la bavure 2, qui s'oppose à cette pénétration entraine sa rupture au niveau de sa jonction avec la pièce l (Fig lob). The part to be deburred 1, comprising a burr 2 to be eliminated is pressed on a flexible die 3 into which it penetrates. In doing so, the resistance of the burr 2, which opposes this penetration causes its rupture at its junction with the part l (Fig lob).
Des études expérimentales ont montré qutun matériau permettant l'opération précédente présente une dureté shore d'une centaine dunités. Experimental studies have shown that a material allowing the previous operation has a shore hardness of a hundred units.
De bons résultats ont été obtenus en utilisant un élastomère de polyuréthane par exemple, commercialisé sous la marque FIBROFLEX par la
Société FIBROFRÂNCE. Good results have been obtained using a polyurethane elastomer for example, sold under the brand name FIBROFLEX by
FIBROFRÂNCE Company.
La pression a exercer entre la matrice souple 3 et la pièce à ébavurer t dépend de plusieurs paramètres, tels que l'angle d'attaque entre l'outil 3 et le plan de la bavure 2, qui doit être voisin de 90 , ltépaisseur et la dureté de la bavure 2, etc... The pressure to be exerted between the flexible matrix 3 and the part to be deburred t depends on several parameters, such as the angle of attack between the tool 3 and the plane of the burr 2, which must be close to 90, the thickness and the hardness of burr 2, etc ...
On estime que l'ordre de grandeur de l'effort nécessaire au cisaillement de la bavure est de lob à 200 kg par centimètre linéaireg ce qui entraîne rapidement un effort de plusieurs tonnes, voire même plusieurs dizaines de tonnes appliqué sur le contour de la pièce. It is estimated that the order of magnitude of the force necessary for shearing the burr is from lob to 200 kg per linear centimeterg which quickly results in an effort of several tonnes, or even several tens of tonnes applied to the contour of the part. .
Ainsi, considérons par exemple, la "coquille" constituant la structure de certains sièges de véhicules automobiles. Le contour extérieur de la pièce atteint 1,70 ms ce qui implique l'application d'un effort total supérieur à 30 tonnes. Thus, consider for example, the "shell" constituting the structure of certain seats of motor vehicles. The external contour of the piece reaches 1.70 ms, which implies the application of a total force of more than 30 tonnes.
Il faut donc que la pièce traitée soit parfaitement maintenue entre deux éléments rigides, adaptés à la forme de la pièce, ne laissant librement dépasser que la partie à ébavurer. Ceci est visible à la figure 2. It is therefore necessary that the treated part is perfectly maintained between two rigid elements, adapted to the shape of the part, leaving freely exceed only the part to be deburred. This is visible in Figure 2.
O c
En ce qui concerne la matrice souple.3, le règlage est fait pour que le montage en position comprimée entraîne une pénétration de 2mm environ des arêtes à ébavurer dans le matériau, ce qui assure bien la découpe de la bavure 2. O c
With regard to the flexible matrix. 3, the adjustment is made so that the mounting in the compressed position results in a penetration of approximately 2 mm of the edges to be deburred in the material, which effectively ensures the cutting of the burr 2.
Il est a noter que, bien que certaines modifications de ltétat de surface ou des caractéristiques initiales d'enfoncement de la matrice 3 puissent intervenir au cours des cycles de travail, ceci ne modifie finalement pas l'aptitude à la découpe des bavures du dispositif selon l'invention. It should be noted that, although certain modifications of the surface state or of the initial driving characteristics of the matrix 3 may occur during the work cycles, this does not ultimately modify the ability to cut the burrs of the device according to the invention.
En référence à la figure 2, on voit la pièce à ébavurer 20 solidement maintenue par deux éléments rigides 21 et 22 de formes correspondantes, ne laissant dépasser que le rebord comportant la bavure 23 à éliminer. A titre informatif, on peut utiliser pour la génération de l'effort de maintien en place des porte-outils 21-22, un vérin hydraulique dont le diamètre est de 63 mm et la course de 30 mm. La puissance est délivrée par un groupe hydraulique dont la pression de service est de 60 bar et le débit de 301/mon, la valeur de ces paramètres étant naturellement ajustée selon les cas. Referring to Figure 2, we see the part to be deburred 20 securely held by two rigid elements 21 and 22 of corresponding shapes, leaving only protrude the rim having the burr 23 to be eliminated. By way of information, it is possible to use, for the generation of the force for holding the tool holders 21-22 in place, a hydraulic cylinder whose diameter is 63 mm and the stroke of 30 mm. The power is delivered by a hydraulic group with a working pressure of 60 bar and a flow rate of 301 / mon, the value of these parameters being naturally adjusted depending on the case.
Les matrices souples 25 sont rapprochées de la bavure périphérique 23 dans les conditions précisées plus haut. The flexible dies 25 are brought closer to the peripheral burr 23 under the conditions specified above.
La figure 3 représente un exemple de mise en oeuvre de l'invention. La pièce 30 passe par un poste de chargement 31, un poste de travail 32 et un poste de déchargement 33, le passage d'un poste à l'autre s'effectuant automatiquement de façon connue en soi par exemple au moyen d'un bras de transfert intégré. FIG. 3 represents an example of implementation of the invention. The part 30 passes through a loading station 31, a work station 32 and an unloading station 33, the passage from one station to the other takes place automatically in a manner known per se, for example by means of an arm integrated transfer.
Un groupe hydraulique, non figuré, assure l'alimentation des vérins de travail 34, de transfert, et de blocage 351de la pièce en position de travail. A hydraulic group, not shown, supplies the working cylinders 34, transfer and blocking 351 of the part in the working position.
On voit à la figure 3 que les vérins de travail 34 agissant vers le haut, déterminent un mouvement final horizontal des matrices sou ples 38, donc perpendiculaire à la bavure. Ceci est obtenu du fait du renvoi de mouvement effectué au moyen du levier 35 dont une extrèmité est solidarisée à la sole 36 de la machine, et l'autre est articulée à la fois à un levier intermédiaire 37 et à l'extrèmité mobile du vérin 34. It can be seen in FIG. 3 that the working cylinders 34 acting upwards, determine a final horizontal movement of the flexible dies 38, therefore perpendicular to the burr. This is obtained due to the movement reference made by means of the lever 35, one end of which is secured to the bottom 36 of the machine, and the other is articulated both to an intermediate lever 37 and to the movable end of the jack. 34.
La matrice souple 38, s'articulant à l'extrèmité libre du lévier intermédiaire 37, exerce alors la pression de rupture sur la bavure à éliminer, orientée comme dans le cas de la figure 2. The flexible matrix 38, which is articulated at the free end of the intermediate lever 37, then exerts the breaking pressure on the burr to be eliminated, oriented as in the case of FIG. 2.
On notera encore la multiplication des matrices souples 38, permettant ainsi de suivre précisément le contour de la pièce à ébavurer. Note also the multiplication of flexible dies 38, thus making it possible to precisely follow the contour of the part to be deburred.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8214769A FR2532239A1 (en) | 1982-08-30 | 1982-08-30 | Method for automatically deflashing parts made from polyester prepreg. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8214769A FR2532239A1 (en) | 1982-08-30 | 1982-08-30 | Method for automatically deflashing parts made from polyester prepreg. |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2532239A1 true FR2532239A1 (en) | 1984-03-02 |
FR2532239B1 FR2532239B1 (en) | 1985-03-15 |
Family
ID=9277104
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8214769A Granted FR2532239A1 (en) | 1982-08-30 | 1982-08-30 | Method for automatically deflashing parts made from polyester prepreg. |
Country Status (1)
Country | Link |
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FR (1) | FR2532239A1 (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110193258A1 (en) * | 2009-05-11 | 2011-08-11 | Nihon Shoryoku Kikai Co., Ltd. | Resin product manufacturing system, manufacturing method, resin molding machine and mold |
WO2016025279A3 (en) * | 2014-08-09 | 2016-04-14 | Apple Inc. | Attachment systems for electronic devices |
US9877549B2 (en) | 2014-08-11 | 2018-01-30 | Apple Inc. | Attachment system for an electronic device |
US9894964B2 (en) | 2014-08-11 | 2018-02-20 | Apple Inc. | Consumer product attachment systems having a locking assembly |
US9926953B2 (en) | 2013-03-15 | 2018-03-27 | Apple Inc. | Attachment apparatuses and associated methods of use and manufacture |
US9949537B2 (en) | 2015-03-06 | 2018-04-24 | Apple Inc. | Clasp mechanism for wrist-worn devices |
US10064460B2 (en) | 2015-09-30 | 2018-09-04 | Apple Inc. | Frictional stabilization of band and securement mechanism |
US10149518B1 (en) | 2016-08-08 | 2018-12-11 | Apple Inc. | Clasp assembly for a wearable device |
US10184506B2 (en) | 2014-08-11 | 2019-01-22 | Apple Inc. | Captive elements of an attachment system |
US10219591B2 (en) | 2016-03-21 | 2019-03-05 | Apple Inc. | Attachment system for an electronic device |
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US2280204A (en) * | 1941-04-24 | 1942-04-21 | Owens Illinois Glass Co | Method and means for removing flash |
DE805563C (en) * | 1948-11-09 | 1951-05-25 | Casp Arn Winkhaus Fa | Device for deburring synthetic resin pressed parts |
US2908936A (en) * | 1955-09-12 | 1959-10-20 | Goodyear Tire & Rubber | Method and apparatus for finishing molded articles |
GB1219511A (en) * | 1968-04-19 | 1971-01-20 | Sachsenring Automobilwerke | Improvements in and relating to a cutting tool for trimming of workpieces of synthetic plastics material |
FR2395115A1 (en) * | 1977-06-24 | 1979-01-19 | Roeder & Spengler Stanz | DEVICE FOR TRIMMING, DETOURING AND GENERALLY REGULARIZING THREE-DIMENSIONAL WORKPIECES |
-
1982
- 1982-08-30 FR FR8214769A patent/FR2532239A1/en active Granted
Patent Citations (5)
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US2280204A (en) * | 1941-04-24 | 1942-04-21 | Owens Illinois Glass Co | Method and means for removing flash |
DE805563C (en) * | 1948-11-09 | 1951-05-25 | Casp Arn Winkhaus Fa | Device for deburring synthetic resin pressed parts |
US2908936A (en) * | 1955-09-12 | 1959-10-20 | Goodyear Tire & Rubber | Method and apparatus for finishing molded articles |
GB1219511A (en) * | 1968-04-19 | 1971-01-20 | Sachsenring Automobilwerke | Improvements in and relating to a cutting tool for trimming of workpieces of synthetic plastics material |
FR2395115A1 (en) * | 1977-06-24 | 1979-01-19 | Roeder & Spengler Stanz | DEVICE FOR TRIMMING, DETOURING AND GENERALLY REGULARIZING THREE-DIMENSIONAL WORKPIECES |
Cited By (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110193258A1 (en) * | 2009-05-11 | 2011-08-11 | Nihon Shoryoku Kikai Co., Ltd. | Resin product manufacturing system, manufacturing method, resin molding machine and mold |
US9321193B2 (en) * | 2009-05-11 | 2016-04-26 | Nihon Shoryoku Kikai Co., Ltd. | Resin product manufacturing system, manufacturing method, resin molding machine and mold |
US11614108B2 (en) | 2013-03-15 | 2023-03-28 | Apple Inc. | Attachment apparatuses and associated methods of use and manufacture |
US9926953B2 (en) | 2013-03-15 | 2018-03-27 | Apple Inc. | Attachment apparatuses and associated methods of use and manufacture |
US11480202B2 (en) | 2013-03-15 | 2022-10-25 | Apple Inc. | Attachment apparatuses and associated methods of use and manufacture |
US10914329B2 (en) | 2013-03-15 | 2021-02-09 | Apple Inc. | Attachment apparatuses and associated methods of use and manufacture |
US10132340B2 (en) | 2013-03-15 | 2018-11-20 | Apple Inc. | Attachment apparatuses and associated methods of use and manufacture |
WO2016025279A3 (en) * | 2014-08-09 | 2016-04-14 | Apple Inc. | Attachment systems for electronic devices |
US11503885B2 (en) | 2014-08-09 | 2022-11-22 | Apple Inc. | Attachment systems for electronic devices |
US10016029B2 (en) | 2014-08-09 | 2018-07-10 | Apple Inc. | Attachment systems for electronic devices |
US10893726B2 (en) | 2014-08-09 | 2021-01-19 | Apple Inc. | Attachment systems for electronic devices |
US10182623B2 (en) | 2014-08-11 | 2019-01-22 | Apple Inc. | Consumer product attachment systems having locking or expansion characteristics |
US11026484B2 (en) | 2014-08-11 | 2021-06-08 | Apple Inc. | Attachment system for an electronic device |
US10184506B2 (en) | 2014-08-11 | 2019-01-22 | Apple Inc. | Captive elements of an attachment system |
US11723443B2 (en) | 2014-08-11 | 2023-08-15 | Apple Inc. | Consumer product attachment systems having locking or expansion characteristics |
US10264857B2 (en) | 2014-08-11 | 2019-04-23 | Apple Inc. | Attachment system for an electronic device |
US10575602B2 (en) | 2014-08-11 | 2020-03-03 | Apple Inc. | Consumer product attachment systems having a locking assembly |
US10085523B2 (en) | 2014-08-11 | 2018-10-02 | Apple Inc. | Attachment system for an electronic device |
US11717060B2 (en) | 2014-08-11 | 2023-08-08 | Apple Inc. | Attachment system for an electronic device |
US10945496B2 (en) | 2014-08-11 | 2021-03-16 | Apple Inc. | Consumer product attachment systems having locking or expansion characteristics |
US9877549B2 (en) | 2014-08-11 | 2018-01-30 | Apple Inc. | Attachment system for an electronic device |
US9894964B2 (en) | 2014-08-11 | 2018-02-20 | Apple Inc. | Consumer product attachment systems having a locking assembly |
US9949537B2 (en) | 2015-03-06 | 2018-04-24 | Apple Inc. | Clasp mechanism for wrist-worn devices |
US11006705B2 (en) | 2015-03-06 | 2021-05-18 | Apple Inc. | Clasp mechanism for wrist-worn devices |
US10064460B2 (en) | 2015-09-30 | 2018-09-04 | Apple Inc. | Frictional stabilization of band and securement mechanism |
US10219591B2 (en) | 2016-03-21 | 2019-03-05 | Apple Inc. | Attachment system for an electronic device |
US10149518B1 (en) | 2016-08-08 | 2018-12-11 | Apple Inc. | Clasp assembly for a wearable device |
Also Published As
Publication number | Publication date |
---|---|
FR2532239B1 (en) | 1985-03-15 |
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