EP1160054B1 - Apparatus for machining cylindrical journals on workpieces by means of an abrasive belt - Google Patents
Apparatus for machining cylindrical journals on workpieces by means of an abrasive belt Download PDFInfo
- Publication number
- EP1160054B1 EP1160054B1 EP01401124A EP01401124A EP1160054B1 EP 1160054 B1 EP1160054 B1 EP 1160054B1 EP 01401124 A EP01401124 A EP 01401124A EP 01401124 A EP01401124 A EP 01401124A EP 1160054 B1 EP1160054 B1 EP 1160054B1
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- EP
- European Patent Office
- Prior art keywords
- journal
- abrasive belt
- machined
- axis
- shoe
- 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
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- 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
- B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
- B24B21/004—Machines or devices using grinding or polishing belts; Accessories therefor using abrasive rolled strips
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- 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
- B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
- B24B21/02—Machines or devices using grinding or polishing belts; Accessories therefor for grinding rotationally symmetrical surfaces
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- 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
- B24B35/00—Machines or devices designed for superfinishing surfaces on work, i.e. by means of abrading blocks reciprocating with high frequency
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- 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
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/04—Headstocks; Working-spindles; Features relating thereto
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- 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
- B24B5/42—Single-purpose machines or devices for grinding crankshafts or crankpins
Definitions
- the present invention relates to a machine for abrasive belt machining of cylindrical bearing surfaces on parts, in particular journals and crank pins on crankshafts, comprising for machining a bearing a support on which three band clamping elements abrasive are mounted in a triangle being movable in directions that intersect on the axis of the scope to be machined.
- Superfinishing machines of this type are known, for example, from FR-A-2 636 877, FR-A-2 702 693 and FR-A-2 719 516.
- the clamping elements of the abrasive belt wear jaw-shaped abrasive belt application pads, which can be of great hardness and extend over a greater or lesser circumferential angle, which makes it possible in particular to correct any defects in shape resulting from previous machining operations.
- these clamping elements with their specific application pads are designed for a specific diameter, so that a machine equipped with these clamping elements can only be used for the machining of well-defined parts, for example. example of the crankshafts of a model of engines.
- crankshafts for several models of the same type of engines, or even crankshafts of different types of engines, including pins and / or or the crank pins may in particular have different diameters.
- the present invention relates to an abrasive belt machining machine which is distinguished by great flexibility as regards the diameter of the bearing surfaces that can be machined by the same abrasive belt clamping elements.
- the invention also relates to an abrasive belt machining machine which is distinguished by great flexibility as regards the width of the bearing surfaces that can be machined by the same abrasive belt clamping elements and the same abrasive belts.
- the invention also relates to an abrasive belt machining machine which is distinguished by a better efficiency for machining cast iron crankshaft bearings.
- the machine object of the invention for abrasive belt machining of cylindrical bearing surfaces on parts, in particular journals and / or crank pins on crankshafts comprises for the machining of a bearing a support on which three clamping elements abrasive belts are mounted in a triangle and are movable in directions converging towards the axis of the work surfaces to be machined.
- Each clamping member carries two circumferentially spaced application pads, each pad being shaped to apply the abrasive strip against the bearing along a surface essentially limited to a generatrix parallel to the span axis.
- each shoe is mounted by force in a housing of the clamping element.
- the pad may advantageously have a cylindrical application surface, preferably with a radius of curvature less than the radius of curvature of the scope and more particularly less than half the radius of curvature of the scope.
- Each abrasive belt clamping element may advantageously carry two circumferentially spaced application pads, preferably of a distance such that the latter corresponds substantially to the distance separating the successive pads. two consecutive clamping elements, for the average of the extreme diameters of the spans that can be machined on the same machine.
- each pad may consist of a material such as an elastomer having a Shore hardness of at most 100.
- each abrasive belt application pad comprises, along the axis of the scope to be machined , two end portions of greater hardness located on either side of an intermediate portion of lower hardness.
- the end portions may have a Shore hardness of the order of 95 and the intermediate portion a Shore hardness of about 65.
- the clamping elements and the application pads mounted on these elements it is advantageous to choose the length of the runners and the width of the abrasive belt smaller than the width of the narrowest scopes and to execute on the support on which the abrasive belt clamping elements are mounted, during the machining of the span, an oscillation movement at low speed and at high speed. or medium deflection, which is manifested in the form of a swaying movement of the abrasive belt relative to the scope of the part driven in the usual manner in rotation.
- This swaying movement generated at the abrasive belt is independent of the high-speed, low-deflection oscillation movement impressed in the usual way during the superfinishing machining.
- three clamping elements 1a, 1b and 1c mounted in a manner known per se in a triangle on a not shown support, for example an arm of a machine for superfinishing journals and / or crank pin crank pins, while being movable in directions (arrows 2a, 2b and 2c) converging on the axis 3 of a cylindrical bearing surface 4.1 to be machined.
- Such machines for superfinishing by an abrasive belt 5 are well known in themselves, for example by the prior documents already mentioned, as regards the general structure and the mode of operation, and there is therefore no need for them. describe in more detail in this application.
- Each clamping element 1 carries, on its surface 6 turned towards the scope 4.1 to be machined, two runners 7 parallel to the axis 3, each constituted by a cylindrical log having an axis parallel to the axis 3 of the bearing, having a diameter smaller than the diameter of the span 4.1.
- the two pads 7 of each element 1 are spaced from each other in the circumferential direction by an (angular) distance 1 slightly greater than the (angular) distance f1 separating the two consecutive pads from two successive elements 1 whose runners 7 apply the abrasive belt 5 against the reach 4.1.
- each shoe 7 integral with the element 1 is here forcibly mounted in a housing 8 constituted by a hole in the element 1 so that a cylinder segment of for example 120 ° of the pad 7 exceeds of the surface 6 of the element 1.
- Each pad 7 is advantageously constituted by a material having a Shore hardness of less than 100, for example an elastomer as marketed under the brand COURBHANE by the company COURBIS SYNTHESE of F-26100 ROMANS SUR ISERE.
- the diameter of the pads 7 is chosen, as a function of the diameter of the bearings 4 to be machined, so that the pads are in contact with the bearing, by means of the abrasive belt 5, along contact surfaces which are more or less limited to bearing generatrices.
- the pads allow abrasive belt 5 "penetrate" into the material of the span and, in the case of cast iron crankshaft bearings, to clear the graphite nodules from the surface of the spans.
- each clamping element 1 On each clamping element 1, of two pads 7 with application surface in rolls of reduced diameter with respect to the diameter of the surfaces to be machined, it is possible to machine with the same clamping elements 1 bearing the same skids 7 of the bearings 4 of different diameters, as it appears in the comparison of FIG. 1 with FIG. 2 on which it is recognized that the diameter of the span 4.2 to be machined is significantly smaller than the diameter of the span 4.1 of Figure 1.
- the (angular) distance e2 separating two consecutive shoes 7 from two successive elements 1 is smaller than the (angular) distance f2 separating the two shoes 7 from the same element 1, in contact with the surface 4.2.
- the distance f on each element 1 can be chosen so that it corresponds substantially to the distance e for the mean of the extreme diameters of the bearings 4 that can be machined on the same machine with the same clamping elements 1 equipped the same skates 7.
- a raised surface 4 with a bulge (represented exaggeratedly) must retain this bulge during its superfinishing by the abrasive belt 5.
- the shoes 7 of the clamping elements 1 each consist of several parts of different hardnesses succeeding along the axis 3 of the span 4, namely in this example two end portions 7a, 7b of greater hardness and an intermediate portion 7c of lower hardness .
- the intermediate portion 7c of reduced hardness applies the abrasive belt 5 against the median portion of maximum diameter of the bearing surface 4 with a pressure substantially equal to the pressure with which the abrasive belt 5 is applied against the end portions of reduced diameter of the span, so that the arch of the range is not damaged by the superfinishing.
- a bearing surface 4 is machined using an abrasive belt 4 and clamping elements 1 with shoes 7 (only one of which is shown) having a width less than the width of the bearing surface.
- the clamping elements 1, at their support, not shown, along the axis 3 of the bearing surface 4 are imparted with a low speed oscillation movement so that the belt 5 performs, relative to the scope 4 rotated about its axis 3, a swaying movement symbolized by a dashed trace in Figure 4, with a displacement of such amplitude that the range is machined over its entire width.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Description
La présente invention se rapporte à une machine d'usinage par bande abrasive de portées cylindriques sur des pièces, notamment de tourillons et de manetons sur des vilebrequins, comprenant pour l'usinage d'une portée un support sur lequel trois éléments de serrage de bande abrasive sont montés en triangle en étant mobiles suivant des directions qui se croisent sur l'axe de la portée à usiner.The present invention relates to a machine for abrasive belt machining of cylindrical bearing surfaces on parts, in particular journals and crank pins on crankshafts, comprising for machining a bearing a support on which three band clamping elements abrasive are mounted in a triangle being movable in directions that intersect on the axis of the scope to be machined.
Des machines de superfinition de ce type sont connues, par exemple, par les documents FR-A-2 636 877, FR-A-2 702 693 et FR-A-2 719 516. Suivant ces documents, les éléments de serrage de la bande abrasive portent des patins d'application de bande abrasive en forme de mâchoires, qui peuvent être de grande dureté et s'étendre sur un angle circonférentiel plus ou moins important, ce qui permet en particulier de corriger d'éventuels défauts de forme provenant des opérations d'usinage précédentes. Par contre, ces éléments de serrage avec leurs patins d'application spécifiques sont conçus pour un diamètre bien déterminé, ce qui fait qu'une machine équipée de ces éléments der serrage ne peut être utilisée que pour l'usinage de pièces bien définies, par exemple des vilebrequins d'un modèle de moteurs. Or, pour des raisons de flexibilité, il serait désirable de pouvoir usiner sur une même machine, par exemple des vilebrequins destinés à plusieurs modèles d'un même type de moteurs, voire même des vilebrequins de différents types de moteurs, dont les tourillons et/ou les manetons peuvent en particulier présenter des diamètres différents.Superfinishing machines of this type are known, for example, from FR-A-2 636 877, FR-A-2 702 693 and FR-A-2 719 516. According to these documents, the clamping elements of the abrasive belt wear jaw-shaped abrasive belt application pads, which can be of great hardness and extend over a greater or lesser circumferential angle, which makes it possible in particular to correct any defects in shape resulting from previous machining operations. On the other hand, these clamping elements with their specific application pads are designed for a specific diameter, so that a machine equipped with these clamping elements can only be used for the machining of well-defined parts, for example. example of the crankshafts of a model of engines. However, for reasons of flexibility, it would be desirable to be able to machine on the same machine, for example crankshafts for several models of the same type of engines, or even crankshafts of different types of engines, including pins and / or or the crank pins may in particular have different diameters.
Le problème évoqué ci-dessus pour le diamètre des portées à usiner peut se poser également pour la largeur des portées.The problem mentioned above for the diameter of the staves to be machined can also arise for the width of the staves.
De plus, les machines connues ne donnent pas entière satisfaction pour l'usinage des portées de vilebrequins en fonte, les patins d'application utilisés sur ces machines n'étant pas en mesure de dégager les nodules de graphite des portées, compte tenu de leurs duretés et de leurs angles circonférentiels de contact avec les portées.In addition, the known machines are not entirely satisfactory for the machining of cast iron crankshaft bearings, the application pads used on these machines not being able to clear the graphite nodules of the bearing surfaces, given their hardnesses and their circumferential contact angles with the staves.
La présente invention vise une machine d'usinage par bande abrasive qui se distingue par une grande flexibilité en ce qui concerne le diamètre des portées susceptibles d'être usinées par les mêmes éléments de serrage de bande abrasive. L'invention vise par ailleurs une machine d'usinage par bande abrasive qui se distingue par une grande flexibilité en ce qui concerne la largeur des portées susceptibles d'être usinées par les mêmes éléments de serrage de bande abrasive et les mêmes bandes abrasives. L'invention vise également une machine d'usinage par bande abrasive qui se distingue par une meilleure efficacité pour l'usinage des portées de vilebrequins en fonte.The present invention relates to an abrasive belt machining machine which is distinguished by great flexibility as regards the diameter of the bearing surfaces that can be machined by the same abrasive belt clamping elements. The invention also relates to an abrasive belt machining machine which is distinguished by great flexibility as regards the width of the bearing surfaces that can be machined by the same abrasive belt clamping elements and the same abrasive belts. The invention also relates to an abrasive belt machining machine which is distinguished by a better efficiency for machining cast iron crankshaft bearings.
La machine objet de l'invention pour l'usinage par bande abrasive de portées cylindriques sur des pièces, notamment de tourillons et/ou de manetons sur des vilebrequins, comprend pour l'usinage d'une portée un support sur lequel trois éléments de serrage de bande abrasive sont montés en triangle en étant mobiles suivant des directions qui convergent vers l'axe de la portées à usiner. Chaque élément de serrage porte deux patins d'application espacés dans le sens circonférentiel, chaque patin étant conformé de manière à appliquer la bande abrasive contre la portée suivant une surface essentiellement limitée à une génératrice parallèle à l'axe de la portée. Avantageusement, chaque patin est monté à force dans un logement de l'élément de serrage.The machine object of the invention for abrasive belt machining of cylindrical bearing surfaces on parts, in particular journals and / or crank pins on crankshafts, comprises for the machining of a bearing a support on which three clamping elements abrasive belts are mounted in a triangle and are movable in directions converging towards the axis of the work surfaces to be machined. Each clamping member carries two circumferentially spaced application pads, each pad being shaped to apply the abrasive strip against the bearing along a surface essentially limited to a generatrix parallel to the span axis. Advantageously, each shoe is mounted by force in a housing of the clamping element.
Le patin peut avantageusement présenter une surface d'application bombée en cylindre, de préférence avec un rayon de courbure inférieur au rayon de courbure de la portée et plus particulièrement inférieur à la moitié du rayon de courbure de la portée.The pad may advantageously have a cylindrical application surface, preferably with a radius of curvature less than the radius of curvature of the scope and more particularly less than half the radius of curvature of the scope.
Chaque élément de serrage de bande abrasive peut avantageusement porter deux patins d'application espacés dans le sens circonférentiel, de préférence d'une distance telle que cette dernière corresponde sensiblement à la distance séparant les patins successifs de deux éléments de serrage consécutifs, pour la moyenne des diamètres extrêmes des portées susceptibles d'être usinées sur une même machine.Each abrasive belt clamping element may advantageously carry two circumferentially spaced application pads, preferably of a distance such that the latter corresponds substantially to the distance separating the successive pads. two consecutive clamping elements, for the average of the extreme diameters of the spans that can be machined on the same machine.
De préférence, chaque patin peut être constitué par un matériau tel qu'un élastomère d'une dureté Shore au plus égale à 100.Preferably, each pad may consist of a material such as an elastomer having a Shore hardness of at most 100.
Dans le cas où la portée a été réalisée en ébauche avec un bombé qui doit être conservé lors de la superfinition, il est possible de faire en sorte que chaque patin d'application de bande abrasive comprenne, suivant l'axe de la portée à usiner, deux parties d'extrémité de plus grande dureté situées de part et d'autre d'une partie intermédiaire de plus faible dureté. A titre d'exemple, les parties d'extrémité peuvent présenter une dureté Shore de l'ordre de 95 et la partie intermédiaire une dureté Shore de l'ordre de 65.In the case where the span has been made in rough with a bulge which must be kept during superfinishing, it is possible to ensure that each abrasive belt application pad comprises, along the axis of the scope to be machined , two end portions of greater hardness located on either side of an intermediate portion of lower hardness. By way of example, the end portions may have a Shore hardness of the order of 95 and the intermediate portion a Shore hardness of about 65.
Pour pouvoir usiner, avec la même machine, des portées de largeurs différentes, sans avoir à changer la bande abrasive, les éléments de serrage et les patins d'application montés sur ces éléments, il est avantageux de choisir la longueur des patins et la largeur de la bande abrasive inférieures à la largeur des portées les plus étroites et de faire exécuter au support sur lequel sont montés les éléments de serrage de bande abrasive, pendant l'usinage de la portée, un mouvement d'oscillation à faible vitesse et à grand ou moyen débattement, qui se manifeste sous la forme d'un mouvement de louvoiement de la bande abrasive par rapport à la portée de la pièce entraînée de façon usuelle en rotation. Ce mouvement de louvoiement engendré au niveau de la bande abrasive est indépendant du mouvement d'oscillation à grande vitesse et à faible débattement imprimé de façon usuelle à la pièce pendant l'usinage de superfinition.In order to be able to machine different widths with the same machine, without having to change the abrasive belt, the clamping elements and the application pads mounted on these elements, it is advantageous to choose the length of the runners and the width of the abrasive belt smaller than the width of the narrowest scopes and to execute on the support on which the abrasive belt clamping elements are mounted, during the machining of the span, an oscillation movement at low speed and at high speed. or medium deflection, which is manifested in the form of a swaying movement of the abrasive belt relative to the scope of the part driven in the usual manner in rotation. This swaying movement generated at the abrasive belt is independent of the high-speed, low-deflection oscillation movement impressed in the usual way during the superfinishing machining.
En se référant aux dessins annexés, on va décrire ci-après plus en détail un mode de réalisation illustratifs et non limitatif d'une machine d'usinage conforme à l'invention; sur les dessins:
- la figure 1 représente schématiquement les trois éléments de serrage de bande abrasive, à deux patins d'application chacun, en position d'usinage d'une portée de grand diamètre;
- la figure 2 représente les trois mêmes éléments en position d'usinage d'une portée de faible diamètre;
- la figure 3 représente un élément de serrage avec un patin à gradient axial de dureté pour l'usinage d'une portée bombée; et
- la figure 4 représente un élément de serrage avec un patin et une bande abrasive de largeur réduite et le mouvement de louvoiement de la bande par rapport à la portée.
- Figure 1 shows schematically the three abrasive belt clamping elements, each with two application pads, in the machining position of a large diameter range;
- Figure 2 shows the same three elements in the machining position of a small diameter range;
- FIG. 3 represents a clamping element with an axial gradient gradient of hardness for machining a convex surface; and
- FIG. 4 shows a clamping member with a pad and a reduced width abrasive band and the movement of the strip with respect to the bearing.
Selon la figure 1, trois éléments de serrage 1a, 1b et 1c montés de façon connue en soi en triangle sur un support non représenté, par exemple un bras d'une machine de superfinition des tourillons et/ou des manetons de vilebrequins, en étant mobiles suivant des directions (flèches 2a, 2b et 2c) convergeant sur l'axe 3 d'une portée cylindrique 4.1 à usiner. De telles machines pour la superfinition par une bande abrasive 5 sont bien connues en soi, par exemple par les documents antérieurs déjà mentionnés, en ce qui concerne la structure générale et le mode de fonctionnement, et il n'y a donc pas lieu de les décrire plus en détail dans le cadre de la présente demande.According to FIG. 1, three
Chaque élément de serrage 1 porte, à sa surface 6 tournée vers la portée 4.1 à usiner, deux patins 7 parallèles à l'axe 3, constitués chacun par un rondin cylindrique d'axe parallèle à l'axe 3 de la portée, ayant un diamètre inférieur au diamètre de la portée 4.1. Les deux patins 7 de chaque élément 1 sont espacés l'un de l'autre dans le sens circonférentiel d'une distance (angulaire) 1 légèrement supérieure à la distance (angulaire) f1 séparant les deux patins consécutifs de deux éléments 1 successifs dont les patins 7 appliquent la bande abrasive 5 contre la portée 4.1.Each
Il est à noter que chaque patin 7 solidaire de l'élément 1 est ici monté à force dans un logement 8 constitué par un trou ménagé dans l'élément 1 de manière qu'un segment de cylindre de par exemple 120° du patin 7 dépasse de la surface 6 de l'élément 1.It should be noted that each
Chaque patin 7 est avantageusement constitué par un matériau ayant une dureté Shore de moins de 100, par exemple un élastomère tel que commercialisé sous la marque COURBHANE par la Société COURBIS SYNTHESE de F-26100 ROMANS SUR ISERE.Each
Le diamètre des patins 7 est choisi, en fonction du diamètre des portées 4 à usiner, de manière que les patins se trouvent en contact avec la portée, par l'intermédiaire de la bande abrasive 5, suivant des surfaces de contact qui se limitent plus ou moins à des génératrices de la portée.The diameter of the
Du fait de la dureté limitée du matériau des patins et de la forme des patins qui fait que le contact de la bande avec la portée, à l'endroit de chaque patin, s'effectue essentiellement suivant une génératrice de la portée, les patins permettent à la bande abrasive 5 de "pénétrer" dans le matériau de la portée et, dans le cas des portées de vilebrequins en fonte, de dégager les nodules de graphite de la surface des portées.Because of the limited hardness of the skate material and the shape of the pads, which makes the contact of the strip with the bearing surface, at the location of each pad, essentially takes place along a generatrix of the bearing surface, the pads allow
Compte tenu de la présence, sur chaque élément de serrage 1, de deux patins 7 à surface d'application en cylindre de diamètre réduit par rapport au diamètre des portées à usiner, il est possible d'usiner avec les mêmes éléments de serrage 1 portant les mêmes patins 7 des portées 4 de diamètres différents, tel que cela apparaît à la comparaison de la figure 1 avec la figure 2 sur laquelle on reconnaît que le diamètre de la portée 4.2 à usiner est nettement plus faible que le diamètre de la portée 4.1 de la figure 1.Taking into account the presence, on each
Sur la figure 2, la distance (angulaire) e2 séparant deux patins 7 consécutifs de deux éléments 1 successifs est inférieure à la distance (angulaire) f2 séparant les deux patins 7 d'un même élément 1, en contact avec la portée 4.2.In FIG. 2, the (angular) distance e2 separating two
De préférence, la distance f sur chaque élément 1 peut être choisie de manière qu'elle corresponde sensiblement à la distance e pour la moyenne des diamètres extrêmes des portées 4 susceptibles d'être usinées sur une même machine avec les mêmes éléments de serrage 1 équipés des mêmes patins 7.Preferably, the distance f on each
Selon la figure 3, une portée 4 ébauchée avec un bombé (représenté de façon exagérée) doit conserver ce bombé lors de sa superfinition par la bande abrasive 5. Pour cela, les patins 7 des éléments de serrage 1 (dont un seul est représenté) se composent chacun de plusieurs parties de duretés différentes se succédant suivant l'axe 3 de la portée 4, à savoir dans cet exemple de deux parties d'extrémité 7a, 7b de plus forte dureté et d'une partie intermédiaire 7c de plus faible dureté. Ainsi, bien que les trois parties 7a, 7b et 7c présentent la même section, la partie intermédiaire 7c de dureté réduite applique la bande abrasive 5 contre la partie médiane de diamètre maximal de la portée 4 avec une pression sensiblement égale à la pression avec laquelle la bande abrasive 5 est appliquée contre les parties d'extrémité de diamètre réduit de la portée, de sorte que le bombé de la portée ne se trouve pas détérioré par la superfinition.According to FIG. 3, a raised surface 4 with a bulge (represented exaggeratedly) must retain this bulge during its superfinishing by the
Selon la figure 4, une portée 4 est usinée à l'aide d'une bande abrasive 4 et d'éléments de serrage 1 à patins 7 (dont un seul est représenté) ayant une largeur inférieure à la largeur de la portée 4. En vue de l'usinage uniforme de la portée 4, on imprime aux éléments de serrage 1, au niveau de leur support non représenté, suivant l'axe 3 de la portée 4, un mouvement d'oscillation à faible vitesse de manière que la bande 5 effectue, par rapport à la portée 4 entraînée en rotation autour de son axe 3, un mouvement de louvoiement symbolisé par une trace en tirets sur la figure 4, avec un débattement d'amplitude telle que la portée soit usinée sur toute sa largeur.According to FIG. 4, a bearing surface 4 is machined using an abrasive belt 4 and
Claims (10)
- Apparatus for the machining by abrasive belt (5) of cylindrical journals (4) on workpieces, such as main journals and/or crankpins on crankshafts, comprising for the machining of a journal (4) three abrasive belt-clamping elements (1) mounted in a triangle and moveable in directions which converge on the axis of the journal to be machined, characterized in that each clamping element (1) carries two application shoes (7) spaced apart circumferentially, each shoe being shaped in such a way as to press the abrasive belt (5) against the journal (4) over a surface essentially limited to a generatrix parallel to the journal axis (3).
- Apparatus according to Claim 1, wherein each shoe (7) is force-fitted onto a housing (8) in the clamping element.
- Apparatus according to Claim 1 or 2, wherein each shoe (7) has a cylindrically curved application surface.
- Apparatus according to Claim 3, wherein the radius of curvature of the application surface is less than the radius of curvature of the journal.
- Apparatus according to Claim 4, wherein the radius of curvature of the application surface is less than half the radius of curvature of the journal.
- Apparatus according to any one of the preceding claims, wherein the distance (f) between the two shoes (7) of each clamping element (1) is approximately equal to the distance (e) between the successive shoes of two consecutive clamping elements.
- Apparatus according to any one of the preceding claims, wherein each shoe (7) consists of a cylindrical member in a material such as an elastomer having a Shore hardness less than or equal to 100.
- Apparatus according to any one of the preceding claims, wherein each shoe (7) has a hardness gradient along the axis (3) of the journal (4) to be machined.
- Apparatus according to Claim 8, wherein each shoe (7) comprises, along the axis (3) of the journal (4) to be machined, two end parts (7a, 7b) of greater hardness situated on each side of an intermediate part (7c) of less hardness.
- Apparatus according to any one of the preceding claims, wherein the length of the shoes (7) and the width of the abrasive belt (5) are less than the width of the journal (4) to be machined and the clamping elements (1) perform, during machining, along the axis (3) of the journal (4) to be machined, a low-speed oscillating and traversing movement such that the abrasive belt (5) executes a spinning movement relative to the journal (4) as the latter is driven round about its axis (3), in order to machine the full width of the journal (4).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0005727A FR2808463B1 (en) | 2000-05-04 | 2000-05-04 | ABRASIVE TAPE MACHINE FOR CYLINDRICAL DOORS ON PARTS |
| FR0005727 | 2000-05-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1160054A1 EP1160054A1 (en) | 2001-12-05 |
| EP1160054B1 true EP1160054B1 (en) | 2007-02-21 |
Family
ID=8849903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01401124A Expired - Lifetime EP1160054B1 (en) | 2000-05-04 | 2001-04-30 | Apparatus for machining cylindrical journals on workpieces by means of an abrasive belt |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6454638B2 (en) |
| EP (1) | EP1160054B1 (en) |
| JP (1) | JP2001353652A (en) |
| DE (1) | DE60126707T2 (en) |
| ES (1) | ES2282212T3 (en) |
| FR (1) | FR2808463B1 (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10342139B4 (en) * | 2003-09-12 | 2008-06-19 | Thielenhaus Technologies Gmbh | Process for finishing peripheral surfaces on wave-shaped workpieces |
| EP1518643B1 (en) * | 2003-09-16 | 2009-11-04 | Supfina Grieshaber GmbH & Co. KG | Finishing apparatus |
| FR2872726B1 (en) * | 2004-07-08 | 2007-11-23 | Societes Des Procedes Et Machi | SUPERFINITION DEVICE AND ASSOCIATED METHOD |
| DE102007051047B4 (en) * | 2007-10-16 | 2023-03-23 | Nagel Maschinen- Und Werkzeugfabrik Gmbh | Press-on device for finishing belt and device and method for finishing peripheral surfaces on cylindrical workpiece sections |
| JP2009119548A (en) * | 2007-11-14 | 2009-06-04 | Honda Motor Co Ltd | Shaft part finishing device |
| EP2327510B1 (en) * | 2009-11-25 | 2011-07-06 | Supfina Grieshaber GmbH & Co. KG | Finishing device |
| FR2975621A3 (en) * | 2011-05-24 | 2012-11-30 | Renault Sa | Method for belt-finishing cylindrical bearing surface of e.g. crank pins of crankshafts in automobile transmission system, involves applying belt-finishing pressure on bearing surface using belt-finishing pads over rotational period |
| CN102366919B (en) * | 2011-09-21 | 2015-01-07 | 杭州祥生砂光机制造有限公司 | One-circle and double-grinding chamfer deburring machine and deburring method thereof |
| EP2674248B1 (en) * | 2012-06-15 | 2014-09-17 | Supfina Grieshaber GmbH & Co. KG | Finishing device |
| EP2712702B1 (en) * | 2012-10-01 | 2014-12-03 | Supfina Grieshaber GmbH & Co. KG | Belt finishing device, belt finishing system and method for producing a belt finishing device |
| EP2769806B1 (en) * | 2013-02-21 | 2014-12-17 | Supfina Grieshaber GmbH & Co. KG | Device and system for finishing a workpiece in the form of a crankshaft or a camshaft |
| DE102014211938A1 (en) * | 2014-06-23 | 2015-12-24 | Nagel Maschinen- Und Werkzeugfabrik Gmbh | Finish Tool |
| DE102014214719A1 (en) * | 2014-07-25 | 2016-01-28 | Supfina Grieshaber Gmbh & Co. Kg | finish device |
| DE102015122189A1 (en) * | 2015-12-18 | 2017-06-22 | Thielenhaus Technologies Gmbh | Finish tool with locally varying cutting ability |
| USD834075S1 (en) | 2016-08-05 | 2018-11-20 | Ebara Corporation | Pressing member for substrate polishing apparatus |
| CN110253352B (en) * | 2019-07-17 | 2021-02-12 | 沈阳建筑大学 | Integrated clamp for clamping and grinding inner ring and outer ring of bearing |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2636877A1 (en) * | 1988-09-27 | 1990-03-30 | Procedes Machines Speciales | MACHINE FOR THE ABRASIVE MACHINING OF CYLINDRICAL SURFACES ON PARTS, PARTICULARLY FOR THE MACHINING BY CANVAS OF TRACKS AND CRANKSHAFT ON CRANKSHAFT |
| FR2702693A1 (en) * | 1993-03-18 | 1994-09-23 | Procedes Machines Speciales | Tooling for applying abrasive cloth to a machine for machining cylindrical bearing surfaces on components using abrasive cloth |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4993191A (en) * | 1989-04-28 | 1991-02-19 | Industrial Metal Products Corporation | Roller cam microfinishing tooling |
| FR2719516B1 (en) * | 1994-05-04 | 1996-07-26 | Procedes Machines Speciales | Tools for the grooming of cylindrical spans with diameter control of spans. |
| DE4426923A1 (en) * | 1994-07-29 | 1996-02-01 | Grieshaber Masch | Device for the surface treatment of workpieces |
| FR2758756B1 (en) * | 1997-01-30 | 1999-02-26 | Procede Machines Speciales Spm | MACHINE ASSEMBLY BY ABRASIVE BELT OF A CYLINDRICAL RANGE OF A WORKPIECE |
-
2000
- 2000-05-04 FR FR0005727A patent/FR2808463B1/en not_active Expired - Fee Related
-
2001
- 2001-04-30 ES ES01401124T patent/ES2282212T3/en not_active Expired - Lifetime
- 2001-04-30 DE DE60126707T patent/DE60126707T2/en not_active Expired - Fee Related
- 2001-04-30 EP EP01401124A patent/EP1160054B1/en not_active Expired - Lifetime
- 2001-05-04 US US09/848,266 patent/US6454638B2/en not_active Expired - Fee Related
- 2001-05-07 JP JP2001136214A patent/JP2001353652A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2636877A1 (en) * | 1988-09-27 | 1990-03-30 | Procedes Machines Speciales | MACHINE FOR THE ABRASIVE MACHINING OF CYLINDRICAL SURFACES ON PARTS, PARTICULARLY FOR THE MACHINING BY CANVAS OF TRACKS AND CRANKSHAFT ON CRANKSHAFT |
| FR2702693A1 (en) * | 1993-03-18 | 1994-09-23 | Procedes Machines Speciales | Tooling for applying abrasive cloth to a machine for machining cylindrical bearing surfaces on components using abrasive cloth |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1160054A1 (en) | 2001-12-05 |
| FR2808463A1 (en) | 2001-11-09 |
| DE60126707T2 (en) | 2007-10-31 |
| DE60126707D1 (en) | 2007-04-05 |
| JP2001353652A (en) | 2001-12-25 |
| ES2282212T3 (en) | 2007-10-16 |
| FR2808463B1 (en) | 2002-09-13 |
| US6454638B2 (en) | 2002-09-24 |
| US20010041523A1 (en) | 2001-11-15 |
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