EP1252988A1 - Apparatus for machining and deburring tyres - Google Patents
Apparatus for machining and deburring tyres Download PDFInfo
- Publication number
- EP1252988A1 EP1252988A1 EP02008628A EP02008628A EP1252988A1 EP 1252988 A1 EP1252988 A1 EP 1252988A1 EP 02008628 A EP02008628 A EP 02008628A EP 02008628 A EP02008628 A EP 02008628A EP 1252988 A1 EP1252988 A1 EP 1252988A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tire
- tool
- cutting
- deburring
- rotation
- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
- B26D3/003—Cutting work characterised by the nature of the cut made; Apparatus therefor specially adapted for cutting rubber
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/36—Single-purpose machines or devices
- B24B5/366—Single-purpose machines or devices for grinding tyres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
- B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
- B26D1/44—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cup or like cutting member
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S83/00—Cutting
- Y10S83/914—Flash trimming
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/02—Other than completely through work thickness
- Y10T83/0259—Edge trimming [e.g., chamfering, etc.]
Definitions
- the subject of the present invention is a device for machining viscoelastic products: more specifically, it relates to a machine for machining and deburring products rubbery like tires.
- tires have a tread made of outer layer of gum mixes, more or less thick, and in which are molded various grooves and sculptures intended, inter alia, to improve the grip of the vehicle on the ground.
- the tires are often machined by grinding (see for example patent WO 00/15388), but this process causes surface heating which is sometimes sought to be avoided; in addition, we sometimes need a very good surface finish; a cutting process is then used; generally, the tire is rotated about its axis, by moving it towards the tool by a translation of a part of the frame (see for example US 4,036,275).
- the cutting tools used are generally cylindrical, that is to say that the cutting edge of the blade is circular (see for example US 3,426,828 or US 4,036,275) and the cut material passes inside the cylindrical tool and is evacuated in the form of a strap.
- burrs are observed behind the tool at the edge of the grooves of the tire. So far these burrs have not been a particular problem, but in the face of increased quality requirements, and the increasing severity of the tests, it has become necessary, in certain cases, to remove these burrs.
- the subject of the invention is a machine for trimming and deburring treads. of tires after a cutting machining operation which allows the same machine for cutting and deburring without having to dismantle the tire.
- a machine for machining and deburring treads of tires comprising a frame, a mandrel for supporting the tire and drive it in rotation around its axis, a cylindrical cutting tool and means to orient the tool in various directions relative to the tire, is characterized in that it comprises means making it possible to reverse the rotation of said pneumatic and in that said tool can work in two positions substantially symmetrical with respect to the tire, a first position for cutting proper, and a second position for deburring, each of said positions corresponding to an opposite direction of rotation of the tire.
- the machine according to the invention thus has the advantage of ensuring the deburring of the tire while maintaining excellent machining precision. It is a significant advantage relative to a machine which would require turning the tire on its axis and rotate it in reverse in front of the same tool because disassembly and reassembly of the tire on its mandrel would cause a loss of precision of machining the tire.
- said tool has two circular cutting edges capable to occupy one of the two symmetrical positions each.
- the tool in the first position, has a cutting angle alpha, and the pneumatic, an adequate direction of rotation, and in the second position, the tool has an angle less alpha cutting, and the tire, a direction of rotation opposite to the previous one.
- the cutting edge of the tool comprises at least one slot, that is to say a part having a shorter axial length; this allows to cut automatically the strip of material cut into shorter pieces and avoid jams.
- the machine according to the invention can be used in the manner usual, that is to say with a single machining phase, without switching over from the tool and reversing the rotation of the tire: this will be the case, for example, when the tire is completely removed from the tire and there is therefore no burrs to be removed.
- FIG. 1 very schematically shows a machine for machining strips of tire bearing according to the invention.
- This machine includes a first frame fixed 1 support for a mandrel (not shown) on which a tire 2 is mounted.
- machine also includes a movable frame 3 support for a tool holder 4.
- the frame 3 is fixed on a fixed base 5 via two pairs of horizontal rails 6 and 7.
- the rails 6 are oriented perpendicular to the axis of rotation 8 of the tire and allow a translational movement of the frame 3 to move it towards or away from the pneumatic 2.
- the rails 7 are oriented parallel to the axis of rotation 8 of the pneumatic 2 and allow a translational movement of the frame 3 parallel to this axis of rotation of the tire 2.
- the combination of these two translational movements allows the cutting tool to follow all the usual tire profiles.
- the frame 3 also allows the tool holder 4 to be moved vertically by means not represented.
- the machine also includes means (not shown) for setting rotation of the tire 2, to reverse its direction of rotation, as well as to control the displacements of the movable frame 3 and the vertical position of the tool holder 4.
- the tool holder 4 is intended to hold a cutting tool comprising two tools cylindrical cutting 19 and 20.
- a cutting tool comprising two tools cylindrical cutting 19 and 20.
- the tool holder 4 can tilt horizontally around the axis 25 to, as described below, bring the cutting edge of the tool 20 into contact with the pneumatic 2.
- Figure 2 schematically shows the formation of a burr 11 when the cutting edge a cutting tool 12 comes into line with a groove 13 in the tread 14 tire.
- a cutting tool moving in the direction of arrow A relative to a groove 13 in the tread of the tire.
- the edge of the groove 13 is folds under the effect of this tool 12 and disappears without being cut, giving rise to the burr 11.
- the plasticity of the material no longer offers enough resistance to the tool to ensure a clean cut.
- the deburring operation could be carried out by hand if there is few times to do, or by turning the tire 2 on its mandrel and rotating in reverse in front of the same cutting tool, which would take up the burrs in the wrong direction and would allow them to be cut; but we will understand that this process takes time to dismantle and reassemble the tire, and generates offsets or offsets which - even slight - affect the accuracy of the surface condition of the machined tread.
- the tool holder 4 makes it possible to present a cutting tool according to two symmetrical positions with respect to the tire.
- two tools 19 and 20 each comprising a circular cutting edge 21 and 22 and mounted in opposition. These tools are fixed in a support 18 rotated around its axis 26, in a ball cage 23, by a geared motor group 24. The rotation of the cutting tools around their axis 26 facilitates machining and deburring of the tire. It also increases the life of the cutting edges between two sharpenings.
- This assembly 4 is rotatably mounted on a horizontal axis 25 substantially parallel to that tire 2, which makes it possible to adjust (by means not shown) the angle cutting angle ⁇ or - ⁇ of tool 19 or 20.
- the cutting angle ⁇ is defined as the angle between the normal to the tread at the point of contact and the axis of rotation 26 of tools 19 and 20.
- Figure 3 shows the tool 19 in the machining position of the tread 14 of the tire 2 (cutting edge 21 in action), while FIG. 4 shows the tool 20 in deburring position (cutting edge 22 in action).
- the tool holder 4 was tilted around the axis 25, adjusted if necessary vertical and horizontal positions of the tool holder 4 relative to the tread 14 of tire 2 and the direction of rotation has been reversed (arrows F and F ') of the pneumatic 2. The cutting angle is then - ⁇ .
- an important advantage of this variant lies in the fact that, thanks to the two cutting edges of the cutting tool, the latter is very quickly and very easily put into action, and moreover with precision maximum; this leads to an extremely tread surface condition specific.
- the two positions of the tool are symmetrical with respect to the tire; in the two phases we use angles of cuts ⁇ and - ⁇ weak and substantially equal, but it will be noted that the point of attack of the cutting tool on the surface to be machined may be slightly different. All of the mechanical means described above, without going into the details of techniques well known, allows to adjust the position of the tool with extreme precision.
- Cutting tools 19 and 20 can be cylindrical tools with a cutting edge circular as described in US Pat. No. 4,036,275.
- FIGs 5 and 6 show a preferred variant of the cutting tool according to the invention.
- the tool 30 is presented in top view in FIG. 5 and from the side in FIG. 6. It comprises a cutting edge 31 comprising a plurality of slots 32, that is to say zones having a shorter axial length. These slots are preferably arranged so regular all around the cutting edge of the tool. These slots can be obtained simply by machining in the cylindrical surface of the tool located on the same side as the cutting longitudinal grooves which open into the cutting edge in the form said slots. In Figure 6, we see that the cutting edge of the tool is arranged externally and thus the grooves are also made externally.
- these slots allow to cut the cut rubber strip in short sections and thus avoid jamming when cutting.
- the diameter of the tool can be of the order of 150 mm.
- FIG. 7 shows a second variant 40 of a cutting tool according to the invention.
- the grooves 43 are helical instead of being axial.
- Each slot 42 thus has inclined edges instead of being normal as in the case of tool 30. This provides a leading edge and trailing edge effect of the cutting edge. 41 of tool 40. This effect can facilitate the cutting of cut strips.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Tyre Moulding (AREA)
- Turning (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
Description
La présente invention a pour objet un dispositif d'usinage de produits viscoélastiques : plus précisément, elle a pour objet une machine d'usinage et d'ébavurage de produits caoutchouteux comme des pneumatiques.The subject of the present invention is a device for machining viscoelastic products: more specifically, it relates to a machine for machining and deburring products rubbery like tires.
On sait que les pneumatiques comportent une bande de roulement constituée d'une couche extérieure de mélanges à base de gommes, plus ou moins épaisse, et dans laquelle sont moulées des rainures et sculptures diverses destinées, entre autres, à améliorer l'adhérence du véhicule sur le sol.We know that tires have a tread made of outer layer of gum mixes, more or less thick, and in which are molded various grooves and sculptures intended, inter alia, to improve the grip of the vehicle on the ground.
Il faut, dans certains cas, usiner la surface extérieure du pneumatique : par exemple, pour préparer le rechapage d'une enveloppe usée, ou bien pour obtenir - à partir d'une enveloppe neuve - un pneumatique « usé » en vue de faire certains essais sur la ceinture rigide, ou sur la carcasse, sans être gêné par le très fort échauffement lié à l'épaisseur de gomme de la bande de roulement neuve au cours de ces essais.In some cases it is necessary to machine the outer surface of the tire: for example, to prepare the retreading of a worn envelope, or to obtain - from a new tire - a "worn" tire for certain tests on the belt rigid, or on the carcass, without being bothered by the very strong heating linked to the thickness of new tread rubber during these tests.
Dans le premier cas (rechapage), on usine souvent les pneumatiques par meulage (voir
par exemple le brevet WO 00/15388), mais ce procédé provoque un échauffement
superficiel que l'on veut parfois éviter ; de plus, on a quelquefois besoin d'un très bon
état de surface ; on utilise alors un procédé de coupe ; généralement, on fait tourner le
pneumatique autour de son axe, en le déplaçant vers l'outil par une translation d'une
partie du bâti (voir par exemple US 4 036 275).
Les outils de coupe utilisés sont généralement cylindriques, c'est-à-dire que le tranchant
de la lame est circulaire (voir par exemple US 3 426 828 ou US 4 036 275) et la matière
coupée passe à l'intérieur de l'outil cylindrique et s'évacue sous la forme d'une lanière.
Lorsqu'on usine par un procédé de coupe une bande de roulement de pneumatique
comportant des sculptures, on constate la formation de bavures en arrière de l'outil au
bord des rainures du pneumatique. Jusqu'ici ces bavures ne constituaient pas un
problème particulier, mais devant les exigences accrues de qualité, et la sévérité
croissante des essais, il est devenu nécessaire, dans certains cas, de supprimer ces
bavures. In the first case (retreading), the tires are often machined by grinding (see for example patent WO 00/15388), but this process causes surface heating which is sometimes sought to be avoided; in addition, we sometimes need a very good surface finish; a cutting process is then used; generally, the tire is rotated about its axis, by moving it towards the tool by a translation of a part of the frame (see for example US 4,036,275).
The cutting tools used are generally cylindrical, that is to say that the cutting edge of the blade is circular (see for example US 3,426,828 or US 4,036,275) and the cut material passes inside the cylindrical tool and is evacuated in the form of a strap.
When a tire tread with treads is machined by a cutting process, burrs are observed behind the tool at the edge of the grooves of the tire. So far these burrs have not been a particular problem, but in the face of increased quality requirements, and the increasing severity of the tests, it has become necessary, in certain cases, to remove these burrs.
L'invention a pour objet une machine d'usinage et d'ébavurage de bandes de roulement de pneumatiques après une opération d'usinage par coupe qui permet d'utiliser la même machine pour la coupe et l'ébavurage sans avoir à démonter le pneumatique.The subject of the invention is a machine for trimming and deburring treads. of tires after a cutting machining operation which allows the same machine for cutting and deburring without having to dismantle the tire.
Suivant l'invention, une machine d'usinage et d'ébavurage de bandes de roulement de pneumatiques comportant un bâti, un mandrin pour supporter le pneumatique et l'entraíner en rotation autour de son axe, un outil de coupe cylindrique et des moyens pour orienter l'outil dans diverses directions par rapport au pneumatique, est caractérisée en ce qu'elle comporte des moyens permettant d'inverser la rotation dudit pneumatique et en ce que ledit outil peut travailler dans deux positions sensiblement symétriques par rapport au pneumatique, une première position pour la coupe proprement dite, et une seconde position pour l'ébavurage, chacune desdites positions correspondant à un sens de rotation du pneumatique opposé.According to the invention, a machine for machining and deburring treads of tires comprising a frame, a mandrel for supporting the tire and drive it in rotation around its axis, a cylindrical cutting tool and means to orient the tool in various directions relative to the tire, is characterized in that it comprises means making it possible to reverse the rotation of said pneumatic and in that said tool can work in two positions substantially symmetrical with respect to the tire, a first position for cutting proper, and a second position for deburring, each of said positions corresponding to an opposite direction of rotation of the tire.
La machine selon l'invention a ainsi l'avantage d'assurer l'ébavurage du pneumatique tout en gardant une excellente précision d'usinage. C'est un avantage sensible relativement à une machine qui nécessiterait de retourner le pneumatique sur son axe et le faire tourner en sens inverse devant le même outil parce que les démontage et remontage du pneumatique sur son mandrin entraíneraient une perte de précision de l'usinage du pneumatique.The machine according to the invention thus has the advantage of ensuring the deburring of the tire while maintaining excellent machining precision. It is a significant advantage relative to a machine which would require turning the tire on its axis and rotate it in reverse in front of the same tool because disassembly and reassembly of the tire on its mandrel would cause a loss of precision of machining the tire.
Dans une variante préférée, ledit outil présente deux tranchants circulaires capables d'occuper chacun une des deux positions symétriques.In a preferred variant, said tool has two circular cutting edges capable to occupy one of the two symmetrical positions each.
De préférence, dans la première position, l'outil a un angle de coupe alpha, et le pneumatique, un sens de rotation adéquat, et dans la seconde position, l'outil a un angle de coupe moins alpha, et le pneumatique, un sens de rotation opposé au précédent.Preferably, in the first position, the tool has a cutting angle alpha, and the pneumatic, an adequate direction of rotation, and in the second position, the tool has an angle less alpha cutting, and the tire, a direction of rotation opposite to the previous one.
Dans une autre variante préférée, le tranchant de l'outil comporte au moins un créneau, c'est-à-dire une partie ayant une longueur axiale plus faible ; cela permet de tronçonner automatiquement la lanière de matière coupée en morceaux plus courts et d'éviter les bourrages.In another preferred variant, the cutting edge of the tool comprises at least one slot, that is to say a part having a shorter axial length; this allows to cut automatically the strip of material cut into shorter pieces and avoid jams.
Bien entendu, la machine conforme à l'invention peut être utilisée de la manière habituelle, c'est-à-dire avec une seule phase d'usinage, sans procéder au basculement de l'outil et à l'inversion de la rotation du pneumatique : il en sera ainsi, par exemple, lorsqu'on procède au déchapage complet du pneumatique et qu'il n'y a donc pas de bavures à éliminer.Of course, the machine according to the invention can be used in the manner usual, that is to say with a single machining phase, without switching over from the tool and reversing the rotation of the tire: this will be the case, for example, when the tire is completely removed from the tire and there is therefore no burrs to be removed.
On va décrire, à titre non limitatif, un exemple de réalisation de la machine d'usinage et d'ébavurage des bandes de roulement de pneumatiques perfectionnée suivant l'invention, en se référant au dessin annexé dans lequel :
- la figure 1 est une vue schématique d'une machine d'usinage et d'ébavurage de pneumatiques selon l'invention ;
- les figures 2a et 2b montrent schématiquement la formation d'une bavure au cours de l'usinage de la bande de roulement d'un pneumatique ;
- la figure 3 est une vue du porte-outil d'une machine selon l'invention, en position d'usinage ;
- la figure 4 est une vue similaire à la figure 3, dans laquelle le porte-outil est en position d'ébavurage ;
- la figure 5 présente en vue de dessus, un mode de réalisation d'un outil cylindrique ;
- la figure 6 présente, en vue de côté, l'outil de la figure 5 ; et
- la figure 7 présente, en vue de côté, un autre mode de réalisation d'un outil cylindrique.
- Figure 1 is a schematic view of a machine for machining and deburring tires according to the invention;
- FIGS. 2a and 2b schematically show the formation of a burr during the machining of the tread of a tire;
- Figure 3 is a view of the tool holder of a machine according to the invention, in the machining position;
- Figure 4 is a view similar to Figure 3, in which the tool holder is in the deburring position;
- Figure 5 shows in top view, an embodiment of a cylindrical tool;
- Figure 6 shows, in side view, the tool of Figure 5; and
- Figure 7 shows, in side view, another embodiment of a cylindrical tool.
La figure 1 présente très schématiquement une machine d'usinage de bandes de
roulement de pneumatiques selon l'invention. Cette machine comprend un premier bâti
fixe 1 support d'un mandrin (non représenté) sur lequel est monté un pneumatique 2. La
machine comprend aussi un bâti mobile 3 support d'un porte-outil 4. Le bâti 3 est fixé
sur un socle fixe 5 par l'intermédiaire de deux paires de rails 6 et 7 horizontaux. Les
rails 6 sont orientés perpendiculairement à l'axe de rotation 8 du pneumatique et
autorisent un mouvement de translation du bâti 3 pour le rapprocher ou l'éloigner du
pneumatique 2. Les rails 7 sont orientés parallèlement à l'axe de rotation 8 du
pneumatique 2 et permettent un déplacement de translation du bâti 3 parallèle à cet axe
de rotation du pneumatique 2. La combinaison de ces deux mouvements de translation
permet à l'outil de coupe de suivre tous les profils usuels des pneumatiques. Le bâti 3
permet aussi de déplacer verticalement le porte-outil 4 grâce à des moyens non
représentés. La machine comprend aussi des moyens (non représentés) pour mettre en
rotation le pneumatique 2, pour inverser son sens de rotation, ainsi que pour piloter les
déplacements du bâti mobile 3 et la position verticale du porte-outil 4.Figure 1 very schematically shows a machine for machining strips of
tire bearing according to the invention. This machine includes a first frame
fixed 1 support for a mandrel (not shown) on which a
Le porte-outil 4 est destiné à maintenir un outil de coupe comprenant deux outils
cylindriques de coupe 19 et 20. A la figure 1, on voit l'outil 19 en position d'usinage du
pneumatique 2. Le porte-outil 4 peut basculer horizontalement autour de l'axe 25 pour,
comme décrit ci-après, venir mettre en contact le tranchant de l'outil 20 contre le
pneumatique 2.The
La figure 2 montre schématiquement la formation d'une bavure 11 lorsque le tranchant
d'un outil de coupe 12 arrive à l'aplomb d'une rainure 13 de la bande de roulement 14
du pneumatique. A la figure 2a, on voit un outil de coupe se déplaçant dans la direction
de la flèche A relativement à une rainure 13 de la bande de roulement du pneumatique.
Comme la rainure 13 est encore éloignée de l'outil de coupe 12, celui-ci sectionne sans
difficulté la lanière 15 de la surface de la bande de roulement 14. En revanche, à la
figure 2b, on voit que, lors du passage de l'outil de coupe 12, le bord de la rainure 13 se
plie sous l'effet de cet outil 12 et s'efface sans être coupé en donnant naissance à la
bavure 11. La plasticité du matériau n'offre plus assez de résistance à l'outil pour
assurer une coupe nette. Lorsqu'on désire obtenir un très bon état de surface, il faut
supprimer ces bavures : l'opération d'ébavurage pourrait s'effectuer à la main s'il y a
peu de reprises à faire, ou bien en retournant le pneumatique 2 sur son mandrin et en le
faisant tourner en sens inverse devant le même outil de coupe, ce qui reprendrait les
bavures à contresens et permettrait de les sectionner; mais on comprendra que ce
procédé demande du temps pour démonter et remonter le pneumatique, et qu'il
engendre des décalages ou des désaxages qui - même légers - nuisent à la précision de
l'état de surface de la bande de roulement usinée.Figure 2 schematically shows the formation of a
Suivant l'invention, le porte-outil 4 permet de présenter un outil de coupe suivant deux
positions symétriques par rapport au pneumatique.According to the invention, the
Dans une variante préférée de l'invention illustrée ici aux figures 3 et 4, on utilise deux
outils 19 et 20 comportant chacun un tranchant circulaire 21 et 22 et montés en
opposition. Ces outils sont fixés dans un support 18 entraíné en rotation autour de son
axe 26, dans une cage à billes 23, par un groupe moto-réducteur 24. La rotation des
outils de coupe autour de leur axe 26 facilite l'usinage et l'ébavurage du pneumatique.
Elle augmente aussi la durée de vie des tranchants entre deux affûtages.In a preferred variant of the invention illustrated here in Figures 3 and 4, two
Cet ensemble 4 est monté rotatif sur un axe horizontal 25 sensiblement parallèle à celui
du pneumatique 2, ce qui permet de régler (grâce à des moyens non représentés) l'angle
de coupe α ou - α de l'outil 19 ou 20. L'angle de coupe α est défini comme l'angle
entre la normale à la bande de roulement au point de contact et l'axe de rotation 26 des
outils 19 et 20.This
La figure 3 montre l'outil 19 en position d'usinage de la bande de roulement 14 du
pneumatique 2 (tranchant 21 en action), tandis que la figure 4 montre l'outil 20 en
position d'ébavurage (tranchant 22 en action). Suivant l'invention, entre les deux
phases, on a basculé le porte-outils 4 autour de l'axe 25, ajusté si nécessaire les
positions verticale et horizontale du porte-outil 4 relativement à la bande de roulement
14 du pneumatique 2 et l'on a inversé le sens de rotation (flèches F et F') du
pneumatique 2. L'angle de coupe est alors - α. Figure 3 shows the
On voit qu'en plus de l'avantage essentiel de l'invention, à savoir qu'il n'est pas nécessaire de retourner le pneumatique sur son mandrin, un avantage important de cette variante réside dans le fait que, grâce aux deux tranchants de l'outil de coupe, ce dernier est très rapidement et très facilement mis en action, et de plus avec une précision maximale ; cela conduit à un état de surface de la bande de roulement extrêmement précis.We see that in addition to the essential advantage of the invention, namely that it is not necessary to turn the tire on its mandrel, an important advantage of this variant lies in the fact that, thanks to the two cutting edges of the cutting tool, the latter is very quickly and very easily put into action, and moreover with precision maximum; this leads to an extremely tread surface condition specific.
Suivant l'invention, les deux positions de l'outil (représentées sur les figures 3 et 4) sont symétriques par rapport au pneumatique ; on utilise dans les deux phases des angles de coupe α et - α faibles et sensiblement égaux, mais on remarquera que le point d'attaque de l'outil de coupe sur la surface à usiner peut être légèrement différent. L'ensemble des moyens mécaniques décrits plus hauts, sans entrer dans le détail de techniques bien connues, permet d'ajuster la position de l'outil avec une extrême précision.According to the invention, the two positions of the tool (shown in Figures 3 and 4) are symmetrical with respect to the tire; in the two phases we use angles of cuts α and - α weak and substantially equal, but it will be noted that the point of attack of the cutting tool on the surface to be machined may be slightly different. All of the mechanical means described above, without going into the details of techniques well known, allows to adjust the position of the tool with extreme precision.
Les outils de coupe 19 et 20 peuvent être des outils cylindriques avec un tranchant
circulaire tels que décrits dans le brevet US 4 036 275.
Les figures 5 et 6 présentent une variante préférée d'outil de coupe selon l'invention.
L'outil 30 est présenté en vue de dessus à la figure 5 et de côté à la figure 6. Il comporte
un tranchant 31 comportant une pluralité de créneaux 32, c'est-à-dire de zones ayant
une longueur axiale plus courte. Ces créneaux sont de préférence disposés de façon
régulière tout autour du tranchant de l'outil. Ces créneaux peuvent être obtenus
simplement en usinant dans la surface cylindrique de l'outil située du même côté que le
tranchant des rainures longitudinales qui débouchent dans le tranchant sous la forme
desdits créneaux. A la figure 6, on voit que le tranchant de l'outil est disposé
extérieurement et ainsi les rainures sont réalisées elles aussi extérieurement.Figures 5 and 6 show a preferred variant of the cutting tool according to the invention.
The
En fonctionnement, ces créneaux permettent de sectionner la lanière de gomme coupée en tronçons courts et ainsi d'éviter un bourrage à la coupe. In operation, these slots allow to cut the cut rubber strip in short sections and thus avoid jamming when cutting.
Le diamètre de l'outil peut être de l'ordre de 150 mm.The diameter of the tool can be of the order of 150 mm.
Avec une vitesse de rotation d'un pneumatique de l'ordre de 100 à 500 tr/mn, un diamètre de l'ordre de 1 m et une vitesse de rotation de l'outil de l'ordre de 55 tr/mn, on obtient des tronçons d'environ 50 cm, au lieu de plusieurs mètres de longueur.With a tire rotation speed of the order of 100 to 500 rpm, a diameter of around 1 m and a tool rotation speed of around 55 rpm, we obtains sections of approximately 50 cm, instead of several meters in length.
La figure 7 présente une seconde variante 40 d'un outil de coupe selon l'invention.
Dans cette variante, on voit que les rainures 43 sont hélicoïdales au lieu d'être axiales.
Chaque créneau 42 a ainsi des bords inclinés au lieu d'être normaux comme dans le cas
de l'outil 30. Cela permet d'obtenir un effet bord d'attaque et bord de fuite du tranchant
41 de l'outil 40. Cet effet peut faciliter le sectionnement des lanières coupées.FIG. 7 shows a
Claims (4)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0105782A FR2824007A1 (en) | 2001-04-26 | 2001-04-26 | TIRE MACHINING AND DEBURRING MACHINE |
FR0105782 | 2001-04-26 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1252988A1 true EP1252988A1 (en) | 2002-10-30 |
EP1252988B1 EP1252988B1 (en) | 2004-06-30 |
Family
ID=8862834
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02008628A Expired - Lifetime EP1252988B1 (en) | 2001-04-26 | 2002-04-17 | Apparatus for machining and deburring tyres |
Country Status (6)
Country | Link |
---|---|
US (1) | US6655438B2 (en) |
EP (1) | EP1252988B1 (en) |
JP (1) | JP4095835B2 (en) |
AT (1) | ATE270174T1 (en) |
DE (1) | DE60200676T2 (en) |
FR (1) | FR2824007A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102699940A (en) * | 2012-06-15 | 2012-10-03 | 山东美鹰食品设备有限公司 | Vegetable cutting machine |
CN105269003A (en) * | 2015-11-28 | 2016-01-27 | 余静远 | Turning tool used for model racing bicycle wheel |
CN109290864A (en) * | 2018-11-10 | 2019-02-01 | 厦门大学嘉庚学院 | Small tyre processing unit (plant) and application method |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2003902698A0 (en) * | 2003-05-30 | 2003-06-19 | Collins, Anthony | Tools mounting assembly |
US8231428B2 (en) * | 2004-02-27 | 2012-07-31 | Akron Special Machinery, Inc. | Tire profile generating machine and related methods |
US8357254B2 (en) * | 2010-01-29 | 2013-01-22 | Bridgestone Bandag, Llc | Method and apparatus for improved tread splicing |
JP5632872B2 (en) * | 2012-04-02 | 2014-11-26 | 住友ゴム工業株式会社 | Ring tread buffing device for retreaded tires |
FR2991234B1 (en) * | 2012-05-31 | 2015-04-03 | Michelin & Cie | METHOD FOR MANUFACTURING A FLEXIBLE WALL IN A PNEUMATIC BEARING TRAP |
KR102536783B1 (en) | 2017-09-21 | 2023-05-30 | 아치 엔터프라이즈 인코포레이티드 | Telescoping modules for use in modular utility systems |
Citations (5)
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US3977131A (en) * | 1974-02-09 | 1976-08-31 | Dunlop Limited | Tire grinding machines |
US4036275A (en) * | 1974-04-12 | 1977-07-19 | Branick Charles E | Tire stripping apparatus |
US4116256A (en) * | 1976-04-22 | 1978-09-26 | National-Standard Company | Tire buffing apparatus |
US4486255A (en) * | 1982-10-05 | 1984-12-04 | N. V. Bekaert S. A. | Method and machine for removing at least one layer of reinforcing elements from a breaker or belt of a rubber tire |
US5054971A (en) * | 1989-02-17 | 1991-10-08 | Entwicklungszentrum Fur Zerspanungstechnik | Apparatus for removing damaged portions of rubber components |
Family Cites Families (7)
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US3426828A (en) | 1966-04-11 | 1969-02-11 | Peter C Neilsen | Tire tread cutting apparatus and method |
US3953915A (en) * | 1975-02-04 | 1976-05-04 | Kennametal Inc. | Method and apparatus for removing tread material from radial belted tires |
US3980120A (en) * | 1975-02-04 | 1976-09-14 | Kennametal Inc. | Method and apparatus for removing tread material from radial belted tires |
US4009499A (en) * | 1976-03-25 | 1977-03-01 | Casler William H | Apparatus for treating the surface of an article |
US4112630A (en) * | 1977-08-08 | 1978-09-12 | The Goodyear Tire & Rubber Company | Reduction of lateral force variations of a tire effective in both forward and rearward senses of rotation |
US4663889A (en) * | 1986-07-14 | 1987-05-12 | The Firestone Tire & Rubber Company | Apparatus and method for grinding sidewall areas of tires |
US6062950A (en) | 1998-09-16 | 2000-05-16 | Bridgestone/Firestone, Inc. | Dual wheel tire grinder |
-
2001
- 2001-04-26 FR FR0105782A patent/FR2824007A1/en active Pending
-
2002
- 2002-04-17 EP EP02008628A patent/EP1252988B1/en not_active Expired - Lifetime
- 2002-04-17 AT AT02008628T patent/ATE270174T1/en not_active IP Right Cessation
- 2002-04-17 DE DE60200676T patent/DE60200676T2/en not_active Expired - Lifetime
- 2002-04-25 US US10/132,558 patent/US6655438B2/en not_active Expired - Lifetime
- 2002-04-26 JP JP2002163568A patent/JP4095835B2/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3977131A (en) * | 1974-02-09 | 1976-08-31 | Dunlop Limited | Tire grinding machines |
US4036275A (en) * | 1974-04-12 | 1977-07-19 | Branick Charles E | Tire stripping apparatus |
US4116256A (en) * | 1976-04-22 | 1978-09-26 | National-Standard Company | Tire buffing apparatus |
US4486255A (en) * | 1982-10-05 | 1984-12-04 | N. V. Bekaert S. A. | Method and machine for removing at least one layer of reinforcing elements from a breaker or belt of a rubber tire |
US5054971A (en) * | 1989-02-17 | 1991-10-08 | Entwicklungszentrum Fur Zerspanungstechnik | Apparatus for removing damaged portions of rubber components |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102699940A (en) * | 2012-06-15 | 2012-10-03 | 山东美鹰食品设备有限公司 | Vegetable cutting machine |
CN102699940B (en) * | 2012-06-15 | 2014-06-11 | 山东美鹰食品设备有限公司 | Vegetable cutting machine |
CN105269003A (en) * | 2015-11-28 | 2016-01-27 | 余静远 | Turning tool used for model racing bicycle wheel |
CN105269003B (en) * | 2015-11-28 | 2017-07-28 | 余静远 | A kind of cutting tool for model racing car wheel |
CN109290864A (en) * | 2018-11-10 | 2019-02-01 | 厦门大学嘉庚学院 | Small tyre processing unit (plant) and application method |
CN109290864B (en) * | 2018-11-10 | 2023-06-16 | 厦门大学嘉庚学院 | Small tire processing device and use method |
Also Published As
Publication number | Publication date |
---|---|
DE60200676T2 (en) | 2005-07-07 |
FR2824007A1 (en) | 2002-10-31 |
ATE270174T1 (en) | 2004-07-15 |
DE60200676D1 (en) | 2004-08-05 |
JP4095835B2 (en) | 2008-06-04 |
US6655438B2 (en) | 2003-12-02 |
EP1252988B1 (en) | 2004-06-30 |
JP2003001724A (en) | 2003-01-08 |
US20020166641A1 (en) | 2002-11-14 |
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