FR2838993A1 - Rotary sander e.g. for painted metal surfaces has supple disc with circular rib on upper surface that creates concave deformation - Google Patents
Rotary sander e.g. for painted metal surfaces has supple disc with circular rib on upper surface that creates concave deformation Download PDFInfo
- Publication number
- FR2838993A1 FR2838993A1 FR0205413A FR0205413A FR2838993A1 FR 2838993 A1 FR2838993 A1 FR 2838993A1 FR 0205413 A FR0205413 A FR 0205413A FR 0205413 A FR0205413 A FR 0205413A FR 2838993 A1 FR2838993 A1 FR 2838993A1
- Authority
- FR
- France
- Prior art keywords
- plate
- rib
- disc
- hub
- circular
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
- B24D13/18—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor with cooling provisions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D9/00—Wheels or drums supporting in exchangeable arrangement a layer of flexible abrasive material, e.g. sandpaper
- B24D9/08—Circular back-plates for carrying flexible material
Abstract
Description
La presente invention concerne un dispositif destine au poncage desThe present invention relates to a device intended for sanding
peintures et revetements existent sur des surfaces sensiblement paints and coatings exist on substantially surfaces
rigides. Plus particulierement, le dispositif s'applique avantageuse- rigid. More particularly, the device applies advantageously-
ment au poncage des carrosseries metalliques, notamment celles des materiels ferroviaires, automobiles ou encore destines a ['aviation, revetues de peinture et/ou aukes revetements de finition et de ment to the sanding of metallic bodies, in particular those of railway, automobile or even aviation materials, coated with paint and / or with finish coatings and
protection, en vue de leur refection. protection, with a view to their repair.
I1 est connu, dans les machines et dispositifs de poncage destines notamment a la preparation des carrosseries, en vue de leur refection, d'utiliser des plateaux rigides de formes generalement de revolution, equipes sur leur face de travail de disques d'abrasifs generalement interchangeables. Les inconvenients couramment rencontres avec ces dispositifs, vent d'une part, une repartition heterogene de l'effcacite du disque d'abrasif, generalement decroissante du centre vers l'exterieur du disque, en raison de ['effort d'appui qui s'applique generalement par le moyeu support du plateau, done preferablement au centre du disque abrasif, et d'autre part, une mauvaise evacuation des particules resultant du travail de poncage, conduisant rapidement a une ineffcacite totale en raison de l'encrassement et du colmatage du disque abrasif, ce phenomene etant parfois amplife par ['elevation de la temperature causee par le travail I1 is known, in machines and sanding devices intended in particular for the preparation of bodywork, for their repair, to use rigid plates of generally revolutionized shapes, equipped on their working face with discs of abrasives generally interchangeable . The disadvantages commonly encountered with these devices, wind on the one hand, a heterogeneous distribution of the effectiveness of the abrasive disc, generally decreasing from the center towards the outside of the disc, due to the 'support force which s generally applied by the support hub of the plate, therefore preferably in the center of the abrasive disc, and on the other hand, poor evacuation of the particles resulting from the sanding work, quickly leading to total ineffectiveness due to the fouling and clogging of the abrasive disc, this phenomenon being sometimes amplified by the rise in temperature caused by work
de poncage.sanding.
Le but principal de ['invention est de proposer un dispositif de poncage qui permette une meilleure effcacite de la peripherie de la The main object of the invention is to provide a sanding device which allows better effciency of the periphery of the
surface abrasive.abrasive surface.
L'invention concerne done un dispositif de poncage rotatif comportant un plateau circulaire d'axe X susceptible d'etre equipe sur The invention therefore relates to a rotary sanding device comprising a circular plate of axis X capable of being fitted on
sa face inferieure d'au moins un element de poncage. its lower face with at least one sanding element.
Selon ['invention le dispositif est caracterise par le fait que le plateau est realise en un materiau souple et presente sur sa face superieure au moins une nervure circulaire qui, sous ['action des forces centrifuges lors de la rotation audit plateau, tend a provoquer According to the invention, the device is characterized by the fact that the plate is made of a flexible material and has on its upper face at least one circular rib which, under the action of centrifugal forces during rotation at said plate, tends to cause
une deformation concave de la face inferieure audit plateau. a concave deformation of the underside of said plate.
Ainsi, grace a ['invention, l'efficacite des elements abrasifs est amelioree dans les regions eloignees de l'axe du plateau en raison de la repartition des efforts d'appui vers la peripherie du plateau par suite de la tendance a la deformation concave de la face de travail du Thus, thanks to the invention, the effectiveness of the abrasive elements is improved in the regions remote from the axis of the plate due to the distribution of the support forces towards the periphery of the plate due to the tendency to concave deformation. of the working face of the
plateau en rotation.rotating table.
Afin d'ameliorer la deformation concave, la nervure comporte avantageusement une pluralite de portions de nervures circulaires, soumises en leurs centres de gravite a des forces centrifuges. La nervure ou les portions de nervure vent disposees de preference a ml-distance du pourtour du plateau et d'un moyeu qui s'etend coaxialement a l'axe X du plateau au-dessus de sa face superieure et qui est equipe d'un insert metallique comportant des moyens pour la fixation du plateau sur un dispositif d'entranement en rotation. Un deuxieme but de ['invention est d'ameliorer ['evacuation des produits de ponc, age afin d'utiliser plus efficacement les elements In order to improve the concave deformation, the rib advantageously comprises a plurality of portions of circular ribs, subjected in their centers of gravity to centrifugal forces. The rib or the wind rib portions preferably arranged at a distance from the periphery of the plate and a hub which extends coaxially to the axis X of the plate above its upper face and which is equipped with a metal insert comprising means for fixing the plate to a rotary drive device. A second object of the invention is to improve the evacuation of sanding products, in order to use the elements more effectively.
abrasifs et augmenter leur duree de vie. abrasives and increase their service life.
Ce deuxieme but est atteint selon ['invention par le fait que le moyeu du plateau et ['insert comportent en outre des per,cages qui debouchent dans des lamages sensiblement radiaux menages dans la face inferieure du plateau. La face inferieure du plateau est equipee de This second object is achieved according to the invention by the fact that the hub of the plate and the insert further comprise holes which open out into substantially radial counterbores formed in the lower face of the plate. The underside of the tray is equipped with
secteurs de feuilles d'abrasif disposes entre les lamages. abrasive sheet sectors arranged between the counterbores.
D'autres caracteristiques et avantages de ['invention Other features and advantages of the invention
ressortiront a la lecture de la description suivante, faite a titre will emerge on reading the following description, made as
d'exemple et en reference aux dessins annexes dans lesquels: la figure 1 est une coupe selon un plan de symetrie selon la ligne I-I de la figure 2 d'un dispositif de pon,cage selon ['invention; la figure 2 est une vue de dessous du dispositif de pon,cage de la figure 1; la figure 3 montre la deformation que peut subir le dispositif de pon,cage selon ['invention sous l'effet des forces centrifuges lorsqu'il est mis en rotation; la figure 4 est semblable a la figure 1 et montre le dispositif de pon,cage en rotation et les reactions de la surface a poncer en cours de pon,cage; la figure 5 est une coupe selon la ligne I-I de la figure 2, d'une variante de realisation du dispositif de pon,cage selon ['invention; la figure 6 est une vue de dessus d'une partie du dispositif de pon,cage selon la fgure 5; et la figure 7 est une vue de dessous d'une autre variante du example and with reference to the accompanying drawings in which: Figure 1 is a section along a plane of symmetry along the line I-I of Figure 2 of a pon device, cage according ['invention; Figure 2 is a bottom view of the pon device, cage of Figure 1; FIG. 3 shows the deformation that the pon device, cage according to the invention can undergo under the effect of centrifugal forces when it is rotated; Figure 4 is similar to Figure 1 and shows the pon device, rotating cage and the reactions of the surface to be sanded during pon, cage; Figure 5 is a section along line I-I of Figure 2, of an alternative embodiment of the pon device, cage according ['invention; Figure 6 is a top view of a part of the pon device, cage according to figure 5; and FIG. 7 is a bottom view of another variant of the
dispositif de poncage selon ['invention. sanding device according to the invention.
Sur les dessins, on a represente par la reference 1 un dispositif de poncage rotatif qui comporte essentiellement un plateau circulaire 2 d'axe X realise par moulage d'un materiau tel qu'un polymere et dont la face inferieure cite face de travail est susceptible d'etre In the drawings, the reference 1 shows a rotary sanding device which essentially comprises a circular plate 2 of axis X produced by molding of a material such as a polymer and the lower face of which cited working face is susceptible of being
equipee d'elements de poncage, tels que des feuilles d'abrasifs. equipped with sanding elements, such as abrasive sheets.
Le plateau 2 presente sur sa face superieure un moyeu 3, entourant coaxialement un insert 4 metallique d'axe X dans lequel est menage un alesage 5 partiellement taraude afin de permettre le montage d'un mandrin 6, lui meme monte sur un dispositif d'entrainement du plateau 2, non represente sur les dessins. L'insert 4 metallique est fxe par tout moyen connu dans un orifice menage dans le moyeu 3 ou de preference le plateau 2 est realise par surmoulage de The plate 2 has on its upper face a hub 3, coaxially surrounding a metal insert 4 of axis X in which is formed a bore 5 partially taped in order to allow the mounting of a mandrel 6, itself mounted on a device drive plate 2, not shown in the drawings. The metal insert 4 is fixed by any known means in a hole in the hub 3 or preferably the plate 2 is produced by overmolding of
['insert 4.['insert 4.
Le moyeu 3 se presente sous la forme d'un bloc tronconique dont la peripherie s'evase vers la face inferieure et se raccorde a la The hub 3 is in the form of a frustoconical block whose periphery widens towards the lower face and is connected to the
portion peripherique 6 du plateau 2. peripheral portion 6 of the plate 2.
Cette portion peripherique 6 a une epaisseur sensiblement homogene sur toute son etendue, sauf sensiblement a ml-distance du pourtour 7 du plateau 2, ou la face superieure du plateau 2 presente une nervure 8 annulaire d'axe X ou de preference une pluralite de portions de nervures 8a, 8b circulaires d' axe X qui, lors de la rotation du plateau 2 autour de l'axe X, sous ['action des forces centrifuges, This peripheral portion 6 has a thickness that is substantially homogeneous over its entire extent, except substantially at a distance from the periphery 7 of the plate 2, where the upper face of the plate 2 has an annular rib 8 of axis X or preferably a plurality of portions. 8a, 8b circular ribs of axis X which, when the plate 2 rotates about the axis X, under the action of centrifugal forces,
vent sollicitees radialement vers l'exterieur. wind stressed radially outwards.
La hauteur de la nervure 8 ou des portions de nervures 8a, 8b est sensiblement egale a la hauteur du moyeu 3. Leur epaisseur est comprise entre O,S et 5 fois l'epaisseur de la portion peripherique 6 et de preference sensiblement egale a ltepaisseur moyenne de la paroi peripherique 6. La hauteur des nervures 8 est au moins egale au double de l'epaisseur de la portion peripherique 6 et peut atteindre The height of the rib 8 or portions of ribs 8a, 8b is substantially equal to the height of the hub 3. Their thickness is between O, S and 5 times the thickness of the peripheral portion 6 and preferably substantially equal to the thickness average of the peripheral wall 6. The height of the ribs 8 is at least twice the thickness of the peripheral portion 6 and can reach
une valeur egale a huit fois cette epaisseur. a value equal to eight times this thickness.
Le raccordement de la nervure 8 ou des portions de nervures 8a, 8b a la portion peripherique 6 se fait par des pentes douces ou des The connection of the rib 8 or portions of ribs 8a, 8b to the peripheral portion 6 is made by gentle slopes or
conges 9a, 9b.leave 9a, 9b.
La face inferieure 10 du plateau 2, ainsi que cela est montre sur la figure 2, presente des lamages sensiblement radiaux 11, dans lesquels debouchent des per,cages 12, menages dans le moyeu 3 et ['insert 4, et relies a des sources de liquide. Des elements de pon,cage 13, sous forme de secteurs de feuilles d'abrasif, repartis autour de l'axe X, vent disposes entre les lamages 11 dans des zones situees sous la portion peripherique 6 du plateau 2. Les lamages 11, au nombre de trots sur les dessins, vent regulierement repartis angulairement autour de l'axe X. lO La figure 7 montre une variante de realisation des lamages 11 qui se presentent sous la forme de deux branches 1 la 1 lb divergeant sensiblement radialement vers l'exterieur, a partir de ['orifice d'un per, cage 12. Les elements de pon,cage 13 montres sur la figure 7 ont The lower face 10 of the plate 2, as shown in FIG. 2, presents substantially radial counterbores 11, into which open holes, cages 12, housings in the hub 3 and [insert 4, and connected to sources liquid. Pon elements, cage 13, in the form of sectors of abrasive sheets, distributed around the axis X, wind arranged between the counterbores 11 in zones located under the peripheral portion 6 of the plate 2. The counterbores 11, at number of trots on the drawings, wind regularly distributed angularly around the axis X. lO Figure 7 shows an alternative embodiment of the counterbores 11 which are in the form of two branches 1 the 1 lb diverging substantially radially outwards , starting from the orifice of a per, cage 12. The elements of pon, cage 13 shown in FIG. 7 have
une forme differente de ceux montres sur la figure 2. a shape different from those shown in figure 2.
Les fgures 5 et 6 montrent un plateau de poncage 2 selon ['invention qui differe de celui montre sur la figure 1, par le fait que la nervure annulaire 8 de la figure 1 est remplacee par une nervure presentant a intervalles reguliers des entailles radiales 15 pour constituer des portions de nervures 8a et 8b soumises chacune a une force centrifuge F lors de la rotation du plateau 2, ce qui accentue la FIGS. 5 and 6 show a sanding plate 2 according to the invention which differs from that shown in FIG. 1, in that the annular rib 8 of FIG. 1 is replaced by a rib presenting at regular intervals radial notches 15 to constitute portions of ribs 8a and 8b each subjected to a centrifugal force F during the rotation of the plate 2, which accentuates the
deformation de la portion peripherique 6 du plateau 2. deformation of the peripheral portion 6 of the plate 2.
La figure 3 montre la forme que prend le plateau 2 en rotation autour de l'axe X, lorsqu'il ntest pas en appui sur une surface a poncer. Les forces centriffiges F dirigees radialement vers l'exterieur vent compensees par les contraintes internee du plateau 2. La face Figure 3 shows the shape that the plate 2 takes in rotation around the axis X, when it is not supported on a surface to be sanded. The centrifugal forces F directed radially outwards are compensated by the internal stresses of the plate 2. The face
inferieure 10 devient concave.lower 10 becomes concave.
Lorsque le plateau 2 est en appui sur une surface a poncer, le dispositif d'entranement du plateau exerce une force P controlee sur ['insert 4. Mais, du fait des forces centrifuges F exercees sur la nervure 8 ou les portions de nervure 8a, 8b qui ont tendance a rendre la face de pon,cage 10 concave, la force P est reprise par des forces de reaction F1 de la surface a poncer s'exer,cant essentiellement sous la zone peripherique 6 du plateau 2 au niveau des elements de poncage 13. La nervure 8 ou les portions de nervure 8a, 8b circulaires conferent au plateau 2 une certaine rigidite renforcee par lteffet des When the plate 2 is supported on a surface to be sanded, the device for driving the plate exerts a force P controlled on the insert 4. However, due to the centrifugal forces F exerted on the rib 8 or the rib portions 8a , 8b which tend to make the face of pon, cage 10 concave, the force P is taken up by reaction forces F1 from the surface to be sanded exer, cant essentially under the peripheral zone 6 of the plate 2 at the level of the elements sanding 13. The rib 8 or the circular rib portions 8a, 8b give the plate 2 a certain rigidity reinforced by the effect of
forces centrifuges lorsque le plateau 2 tourne a sa vitesse de travail. centrifugal forces when the plate 2 rotates at its working speed.
De plus, le centre de gravite des sections verticales de la nervure 8 ou des portions de nervure 8a, 8b etant situe au-dessus de la zone peripherique 6 du plateau, l'effet de la force centrifuge tend a rendre concave la surface de travail 10. Cette tendance est compensee par la force d'appui P du plateau 2 contre la surface a poncer qui s'applique par l'intermediaire du moyeu 3. De cette fa,con on obtient une repartition plus homogene de la force d'appui des differentes zones concentriques de l'abrasif, ce qui conduit a une utilisation optimum de la surface abrasive des elements de pon,cage 13, a une usure plus In addition, the center of gravity of the vertical sections of the rib 8 or of the rib portions 8a, 8b being located above the peripheral zone 6 of the plate, the effect of the centrifugal force tends to make the work surface concave. 10. This tendency is compensated by the bearing force P of the plate 2 against the surface to be sanded which is applied by means of the hub 3. In this way, we obtain a more homogeneous distribution of the bearing force different concentric zones of the abrasive, which leads to optimum use of the abrasive surface of the pon elements, cage 13, to more wear
homogene et done a une efficacite de travail plus importante. homogeneous and therefore has a higher working efficiency.
Les per,cages 12 re,coivent un flux de liquide destine a entraner les produits de pon,cage. Le flux de liquide injecte par les per,cages est reparti sur la face de travail 10 du plateau 2 par les lamages 11 ou 1 1 a et lib, et balaye la surface a poncer. On assure de cette fa,con un pon, cage en vole liquide, avec evacuation naturelle par effet de la force centrifuge, et un refroidissement de l'abrasif et des produits de pon, cage, ce qui conduit a une reduction substantielle de The holes 12 re, coivent a flow of liquid intended to entrain the products of pon, cage. The flow of liquid injected through the holes is distributed over the working face 10 of the plate 2 through the counterbores 11 or 11 a and lib, and sweeps the surface to be sanded. In this way, a pon, cage in liquid fly, is provided with natural evacuation by the effect of centrifugal force, and a cooling of the abrasive and products of pon, cage, which leads to a substantial reduction of
l'encrassement et du colmatage de l'abrasif. fouling and clogging of the abrasive.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0205413A FR2838993A1 (en) | 2002-04-30 | 2002-04-30 | Rotary sander e.g. for painted metal surfaces has supple disc with circular rib on upper surface that creates concave deformation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0205413A FR2838993A1 (en) | 2002-04-30 | 2002-04-30 | Rotary sander e.g. for painted metal surfaces has supple disc with circular rib on upper surface that creates concave deformation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2838993A1 true FR2838993A1 (en) | 2003-10-31 |
Family
ID=28800058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR0205413A Pending FR2838993A1 (en) | 2002-04-30 | 2002-04-30 | Rotary sander e.g. for painted metal surfaces has supple disc with circular rib on upper surface that creates concave deformation |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2838993A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109262392A (en) * | 2018-09-26 | 2019-01-25 | 独山县下司镇飞马石材有限公司 | Slabstone sander |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2217791A (en) * | 1938-11-04 | 1940-10-15 | Arthur C Burleigh | Backing pad for sanding or polishing machines |
| FR2633860A1 (en) * | 1988-07-08 | 1990-01-12 | Premines Sa | Rotating support plate for an abrasive disc using water |
-
2002
- 2002-04-30 FR FR0205413A patent/FR2838993A1/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2217791A (en) * | 1938-11-04 | 1940-10-15 | Arthur C Burleigh | Backing pad for sanding or polishing machines |
| FR2633860A1 (en) * | 1988-07-08 | 1990-01-12 | Premines Sa | Rotating support plate for an abrasive disc using water |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109262392A (en) * | 2018-09-26 | 2019-01-25 | 独山县下司镇飞马石材有限公司 | Slabstone sander |
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