WO2010026319A1 - Method and device for measuring crankshaft imbalance - Google Patents
Method and device for measuring crankshaft imbalance Download PDFInfo
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- WO2010026319A1 WO2010026319A1 PCT/FR2009/051260 FR2009051260W WO2010026319A1 WO 2010026319 A1 WO2010026319 A1 WO 2010026319A1 FR 2009051260 W FR2009051260 W FR 2009051260W WO 2010026319 A1 WO2010026319 A1 WO 2010026319A1
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- crankshaft
- support device
- positioning
- measuring
- unbalance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/14—Determining imbalance
- G01M1/16—Determining imbalance by oscillating or rotating the body to be tested
- G01M1/24—Performing balancing on elastic shafts, e.g. for crankshafts
Definitions
- the present invention relates to the field of unbalance measurement and especially to adaptations to measure the unbalance of a crankshaft unbalanced naturally under the best conditions. DESCRIPTION OF THE PRIOR ART
- crankshafts are those used for example in so-called single-cylinder, twin-cylinder and three-cylinder engines as well as in so-called V engines. These crankshafts have the specificity that once finished, the sum of the moments they present. Naked in rotation is different from 0 (unlike the sum of the moments of naturally balanced finite crankshafts which must tend towards 0).
- the operation of measuring the unbalance of the crankshaft can be performed at the beginning of the machining line for the purpose of dynamic centering of the crankshaft to orient and reduce said imbalances and / or at the end of the line machining to systematically eliminate said unbalance.
- the unbalance measurement operation can currently be performed by a specific device that simulates the equivalent torque to the missing linkage for bare crankshafts.
- the use of such a specific means is complex.
- the Applicant has found that such a method may lack precision.
- Another solution is to use a simpler unbalance measurement system by pre-positioning the crankshaft crank pins simulating masses 1 missing linkage.
- the obligation to repeat the laying and removal of the masses for each crankshaft makes such a method particularly expensive in manufacturing time.
- the simpler unbalance measurement systems conventionally accommodate the pieces to be measured in a horizontal type cradle by resting them on two open bearings, each consisting of the tangential contacts provided by a pair of drive rollers that rotate said part by adhesion. with rolling areas on the part.
- This research is intended in particular to design a method and a device for operating an unbalance measurement system of the type conventionally hosting the parts to be measured by placing them on two open bearings each constituted by the tangential contacts. provided by a pair of drive rollers which rotate said workpiece by contact with rolling areas on the workpiece.
- the Applicant has advantageously devised a method for measuring the unbalance of a naturally unbalanced crankshaft using a measuring machine comprising remarkable drive rollers in that it consists in associating the crankshaft with an independent support device serving as a mechanical interface between the crankshaft and the machine to be measured and comprising: means for positioning and holding said crankshaft in position; means for accommodating simulation masses of one crankshaft of said crankshaft, rolling surfaces arranged coaxially with each other and with the theoretical axis of the crankshaft and which will rest on said drive rollers of the machine to be measured for purposes of rotating the assembly.
- the interface provides working surfaces that can be operated by a simple unbalance measuring machine as described above, it is not necessary to dedicate the measuring machine or to use a specialized machine for unbalanced crankshafts. .
- the use of such a device therefore meets the need for flexibility.
- This device may with some adaptations, be used at the beginning of the machining line for dynamic centering of the crankshaft to orient and reduce said unbalance and / or end of the machining line to systematically eliminate said unbalance.
- the method is remarkable in that it consists in measuring the dimensions of the geometric elements of the crankshaft with which it is in contact with the positioning means of said support device in order to define the possible offset - A - between the theoretical axis from which is defined the positioning of the positioning surfaces and the real axis defined by the surface of the crankshaft so that the unbalance measurement can take into account said shift.
- the unbalance measurement is then optimized and tends to locate the unbalance by reducing it during use at the beginning of the production line.
- Another characteristic of the process rather dedicated to a measuring operation at the beginning of the crankshaft manufacturing line consists in measuring the actual diameter of at least one unmachined crankpin for possibly correcting for the measurement of unbalance, the value of the equivalent torque constituted by the simulation masses of 1 'linkage.
- This measurement makes it possible to control any discrepancy between the actual supplementary mass constituted by the material not removed from the crank pin and that theoretically given by the crankshaft manufacturer. This possible offset can thus be taken into account to correct the calculation of the masses ensuring the simulation of the linkage and which must take into account this material not removed.
- Another characteristic of the process rather dedicated to a measuring operation at the end of the production line is to measure the actual position of the machined crank pins to possibly correct for the measurement of the unbalance, the value of the equivalent torque constituted by the simulation masses of 1 linkage.
- This characteristic makes it possible to take into account any discrepancy between the actual position and the theoretical position of the cranks once machined.
- This measurement and the possible correction associated therewith are all the more useful as the reception areas of the simulation weights adopt a fixed position relative to the positioning surfaces of the device.
- the invention also relates to a device for implementing the aforementioned method.
- This support device is remarkable in that it comprises two flanges which, separated by at least one receiving plate for a crankshaft to be measured, comprising means for positioning and holding in position, are associated with rolling bearings that come into contact with the drive rollers of the machine measurement.
- said positioning means comprise two centering ves cooperating with two bearing surfaces of the crankshaft
- said positioning means comprise a radial abutment (in the context of use at the end of the production line),
- said positioning means comprise a concentric tightening means for a crank pin ensuring not only the positioning but also the measuring of the diameter of said crankpin (in the context of a use of the device at the beginning of the production line), the device comprises a set of flyweights associated with said flanges to simulate the masses of the crankshaft crankshaft worn,
- the device comprises an axial flange ensuring the holding in position in particular when the locating members are removed,
- Said positioning means comprise a retractable clamping collet of a crankpin which ad hocly position said crankpin and ensure the measurement of its diameter.
- FIG. 1 is a schematic drawing of a perspective view of an embodiment of a device according to the invention accommodating a crankshaft and arranged in a measuring machine in the context of an operation of measurement at the end of the manufacturing line
- FIG. 2 is an exploded perspective view of the device of FIG. 1 housing the crankshaft
- FIG. 3 is a schematic drawing of a view from above of the device
- FIG. 4 is a schematic drawing of a sectional side view of the device
- Figure 5 is a schematic drawing of a side view illustrating the location of the crank pin in the context of a measuring operation at the beginning of the manufacturing line.
- the device referenced D as a whole accommodates a crankshaft V and is arranged on a machine referenced M dynamic unbalance measurement.
- This machine is of the type that accommodates the parts to be measured by making them rest on two open bearings each constituted by the tangential contacts offered by a pair of driving rollers P which rotate said part by contact with rolling zones provided on the part which is here constituted by the device D.
- the device D which is itself balanced, serves as a mechanical interface between unbalanced crankshafts and a conventional machine for dynamic measurement of unbalance.
- the support device D consists of two longitudinal plates 110 and 120 disposed opposite each other which connect two side flanges 210 and 220 each carrying a shaft 310 and 320.
- the said plates provide support for the centering ves 410 and 420 cooperating with two bearings or cylindrical surfaces of the crankshaft and a radial abutment 430 necessary for the angular position of the crankshaft V.
- the centering is achieved by cones positioned at the ends of the crankshaft.
- the holding in position is advantageously achieved by axial clamping.
- one of the flanges is equipped in the axis of the crankshaft and on its inner face, an axial stop 221 ensuring the axial positioning of the crankshaft.
- this axial abutment 221 cooperates with an axial flange 211 fitted to the other flange 210 and which makes a holding force in the axis of the crankshaft V and thus the device D.
- This flange is coaxial with the shaft 310 and has a portion which slides in the latter to allow its control of the outside of the device.
- the control device 700 of the flange appears in the drawing of FIG. 1. According to a technological choice avoiding any intervention external to the device during the measuring operation, thanks to a spring system the flange remains at rest in the clamping position, the control device activating only the unclamping.
- the shafts 310 and 320 support the cylindrical surfaces 311 and 321 which will serve as rolling surfaces in the machine M.
- said flanges are arranged to accommodate feeder type adjustment means to reproduce the masses of the machine. linkage to which is connected the crankshaft to measure.
- the bores 500 made in the flanges allow the reception and fixing of weights whose mass, positioning and unbalance that their positioning creates allows to reproduce said linkage.
- FIG. 5 illustrates the location of the crankpin m as part of a measuring operation at the beginning of the production line.
- said positioning means comprise a concentric clamping clamp 600 of the crankpin m which is positioned said crankpin m and ensure the measurement of its diameter. This clamp is removed once the measurement is made so as not to hinder the rotation of the device D.
- This parameter in the context of an unbalance measurement operation at the beginning of the line is obtained on a gross surface and allows to define the possible offset between the theoretical mass of the crank pins from which is defined the positioning and the mass of the flyweights and their actual mass defined by taking measurement of their diameter so that the measurement of unbalance can take into account said shift.
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Abstract
Description
PROCÉDÉ ET DISPOSITIF DE MESURE DE BALOURD DE VILEBREQUIN METHOD AND DEVICE FOR MEASURING CRANKSHAFT BALANCE
DOMAINE D'APPLICATION DE L'INVENTIONFIELD OF APPLICATION OF THE INVENTION
La présente invention a trait au domaine de la mesure du balourd et notamment aux adaptations permettant de mesurer le balourd d'un vilebrequin non équilibré naturellement dans les meilleures conditions. DESCRIPTION DE L'ART ANTÉRIEURThe present invention relates to the field of unbalance measurement and especially to adaptations to measure the unbalance of a crankshaft unbalanced naturally under the best conditions. DESCRIPTION OF THE PRIOR ART
Les vilebrequins non équilibrés naturellement sont ceux utilisés par exemple dans les moteurs dits monocylindres, bi-cylindres, trois cylindres ainsi que dans les moteurs dits en V. Ces vilebrequins ont pour spécificité qu'une fois finis, la somme des moments qu'ils présentent nus en rotation est différente de 0 (contrairement à la somme des moments des vilebrequins naturellement équilibrés finis qui doit tendre vers 0).Naturally unbalanced crankshafts are those used for example in so-called single-cylinder, twin-cylinder and three-cylinder engines as well as in so-called V engines. These crankshafts have the specificity that once finished, the sum of the moments they present. Naked in rotation is different from 0 (unlike the sum of the moments of naturally balanced finite crankshafts which must tend towards 0).
Cette spécificité a pour conséquence que la mesure du balourd de ces vilebrequins requiert la prise en compte d'une partie des masses d'embiellage, c'est à dire d'une partie de la masse des éléments mobiles associés au vilebrequin en fonctionnement.This specificity has the consequence that the unbalance measurement of these crankshafts requires taking into account a portion of the linkage masses, that is to say a portion of the mass of the moving elements associated with the crankshaft in operation.
Dans la chaîne de fabrication d'un vilebrequin, l'opération de mesure du balourd du vilebrequin peut être réalisée en début de ligne d'usinage à des fins de centrage dynamique du vilebrequin pour orienter et réduire lesdits balourds et/ou en fin de ligne d'usinage afin d'éliminer systématiquement lesdits balourds.In the production line of a crankshaft, the operation of measuring the unbalance of the crankshaft can be performed at the beginning of the machining line for the purpose of dynamic centering of the crankshaft to orient and reduce said imbalances and / or at the end of the line machining to systematically eliminate said unbalance.
L'opération de mesure du balourd peut actuellement être réalisée par un dispositif spécifique qui simule le couple équivalent à l'embiellage manquant pour les vilebrequins nus. L'utilisation d'un tel moyen spécifique est complexe. De plus, la demanderesse a constaté qu'une telle méthode pouvait manquer de précision.The unbalance measurement operation can currently be performed by a specific device that simulates the equivalent torque to the missing linkage for bare crankshafts. The use of such a specific means is complex. In addition, the Applicant has found that such a method may lack precision.
Une autre solution consiste à utiliser un système plus simple de mesure du balourd en pré-positionnant sur les manetons du vilebrequin des masses simulant 1 ' embiellage manquant. L'obligation de répéter la pose et l'enlèvement des masses pour chaque vilebrequin rend une telle méthode particulièrement coûteuse en temps de fabrication. Les systèmes plus simples de mesure de balourd accueillent classiquement les pièces à mesurer dans un berceau de type horizontal en les faisant reposer sur deux paliers ouverts constitués chacun par les contacts tangentiels offerts par une paire de rouleaux d'entraînement qui font tourner ladite pièce par adhérence avec des zones de roulement sur la pièce. DESCRIPTION DE L'INVENTIONAnother solution is to use a simpler unbalance measurement system by pre-positioning the crankshaft crank pins simulating masses 1 missing linkage. The obligation to repeat the laying and removal of the masses for each crankshaft makes such a method particularly expensive in manufacturing time. The simpler unbalance measurement systems conventionally accommodate the pieces to be measured in a horizontal type cradle by resting them on two open bearings, each consisting of the tangential contacts provided by a pair of drive rollers that rotate said part by adhesion. with rolling areas on the part. DESCRIPTION OF THE INVENTION
Partant de cet état de fait, la demanderesse a mené des recherches afin de trouver une alternative aux solutions existantes de mesure de balourd des vilebrequins naturellement déséquilibrés.Based on this state of affairs, the applicant has conducted research in order to find an alternative to existing unbalance measurement solutions for naturally unbalanced crankshafts.
Ces recherches ont notamment pour but de concevoir un procédé et un dispositif permettant l'exploitation d'un système de mesure de balourd du type de celui accueillant classiquement directement les pièces à mesurer en les faisant reposer sur deux paliers ouverts constitués chacun par les contacts tangentiels offerts par une paire de rouleaux d'entraînement qui font tourner ladite pièce par contact avec des zones de roulement sur la pièce. Pour ce faire, la demanderesse a avantageusement imaginé un procédé de mesure du balourd d'un vilebrequin naturellement déséquilibré exploitant une machine à mesurer comportant des rouleaux d'entraînement remarquable en ce qu'il consiste à associer le vilebrequin à un dispositif support indépendant servant d'interface mécanique entre le vilebrequin et la machine à mesurer et comprenant : des moyens de mise en position et de maintien en position dudit vilebrequin, - des moyens d'accueil de masses de simulation de 1 'embiellage dudit vilebrequin, - des surfaces de roulement disposées coaxialement entre elles et avec l'axe théorique du vilebrequin et qui vont reposer sur lesdits rouleaux d'entraînement de la machine à mesurer à des fins d'entraînement en rotation de l'ensemble.This research is intended in particular to design a method and a device for operating an unbalance measurement system of the type conventionally hosting the parts to be measured by placing them on two open bearings each constituted by the tangential contacts. provided by a pair of drive rollers which rotate said workpiece by contact with rolling areas on the workpiece. To do this, the Applicant has advantageously devised a method for measuring the unbalance of a naturally unbalanced crankshaft using a measuring machine comprising remarkable drive rollers in that it consists in associating the crankshaft with an independent support device serving as a mechanical interface between the crankshaft and the machine to be measured and comprising: means for positioning and holding said crankshaft in position; means for accommodating simulation masses of one crankshaft of said crankshaft, rolling surfaces arranged coaxially with each other and with the theoretical axis of the crankshaft and which will rest on said drive rollers of the machine to be measured for purposes of rotating the assembly.
Cette caractéristique est remarquable en ce qu'elle permet d'utiliser une interface mécanique unique avec une très bonne répétabilité pour une série de vilebrequins. Il n'est plus nécessaire de disposer des masses de simulation de l'embiellage sur chaque vilebrequin pour l'utilisation d'un système de mesure de balourd simple. Une fois l'embiellage simulé par la disposition de masses adéquates sur l'interface mécanique, les seules opérations à réaliser sont l'installation et la désinstallation du vilebrequin dans le dispositif. Le procédé n'a pas pour but d'équilibrer le contenu du dispositif mais de reproduire des conditions permettant la mesure dynamique des masses du vilebrequin par une machine universelle.This characteristic is remarkable in that it makes it possible to use a single mechanical interface with a very good repeatability for a series of crankshafts. It is no longer necessary to have the crankshaft simulation masses on each crankshaft for the use of a simple unbalance measurement system. Once the linkage is simulated by the provision of adequate masses on the mechanical interface, the only operations to be performed are the installation and removal of the crankshaft in the device. The method is not intended to balance the contents of the device but to reproduce conditions for the dynamic measurement of the masses of the crankshaft by a universal machine.
Comme l'interface met à disposition des surfaces de roulement exploitables par une machine de mesure de balourd simple telle celle décrite plus haut, il n'est pas nécessaire de dédier la machine de mesure ni de faire appel à une machine spécialisée pour les vilebrequins déséquilibrés. L'utilisation d'un tel dispositif répond donc aux besoins de flexibilité. Ce dispositif pourra avec quelques adaptations, être exploité en début de ligne d'usinage à des fins de centrage dynamique du vilebrequin pour orienter et réduire lesdits balourds et/ou en fin de ligne d'usinage afin d'éliminer systématiquement lesdits balourds.Since the interface provides working surfaces that can be operated by a simple unbalance measuring machine as described above, it is not necessary to dedicate the measuring machine or to use a specialized machine for unbalanced crankshafts. . The use of such a device therefore meets the need for flexibility. This device may with some adaptations, be used at the beginning of the machining line for dynamic centering of the crankshaft to orient and reduce said unbalance and / or end of the machining line to systematically eliminate said unbalance.
Selon une autre caractéristique particulièrement avantageuse de l'invention, le procédé est remarquable en ce qu'il consiste à mesurer les dimensions des éléments géométriques du vilebrequin avec lesquels il est en contact sur les moyens de mise en position dudit dispositif support afin de définir le décalage éventuel - A - entre l'axe théorique à partir duquel est défini le positionnement des surfaces de mise en position et l'axe réel défini par la surface du vilebrequin de sorte que la mesure du balourd puisse prendre en compte ledit décalage. La mesure du balourd est alors optimisée et tend à localiser le balourd en le réduisant lors d'une utilisation en début de ligne de fabrication.According to another particularly advantageous feature of the invention, the method is remarkable in that it consists in measuring the dimensions of the geometric elements of the crankshaft with which it is in contact with the positioning means of said support device in order to define the possible offset - A - between the theoretical axis from which is defined the positioning of the positioning surfaces and the real axis defined by the surface of the crankshaft so that the unbalance measurement can take into account said shift. The unbalance measurement is then optimized and tends to locate the unbalance by reducing it during use at the beginning of the production line.
Une autre caractéristique du procédé plutôt dédiée à une opération de mesure en début de ligne de fabrication de vilebrequin consiste à mesurer le diamètre réel d'au moins un maneton non usiné pour éventuellement corriger pour la prise de mesure du balourd, la valeur du couple équivalent constitué par les masses de simulation de 1 'embiellage. Cette mesure permet de contrôler l'éventuel décalage entre la masse supplémentaire réelle constituée par la matière non enlevée au maneton et celle théorique donné par le fabriquant de vilebrequin. Ce décalage éventuel pourra ainsi être pris en compte pour corriger le calcul des masses assurant la simulation de l' embiellage et qui doivent tenir compte de cette matière non enlevée.Another characteristic of the process rather dedicated to a measuring operation at the beginning of the crankshaft manufacturing line consists in measuring the actual diameter of at least one unmachined crankpin for possibly correcting for the measurement of unbalance, the value of the equivalent torque constituted by the simulation masses of 1 'linkage. This measurement makes it possible to control any discrepancy between the actual supplementary mass constituted by the material not removed from the crank pin and that theoretically given by the crankshaft manufacturer. This possible offset can thus be taken into account to correct the calculation of the masses ensuring the simulation of the linkage and which must take into account this material not removed.
Une autre caractéristique du procédé plutôt dédiée à une opération de mesure en fin de ligne de fabrication consiste à mesurer la position réelle des manetons usinés pour éventuellement corriger pour la prise de mesure du balourd, la valeur du couple équivalent constitué par les masses de simulation de 1 'embiellage. Cette caractéristique permet de prendre en compte l'éventuel décalage entre la position réelle et la position théorique des manetons une fois usinés. Cette mesure et l'éventuelle correction y associée sont d'autant plus utiles que les zones d'accueil des masselottes de simulation adoptent une position fixe par rapport aux surfaces de mise en position du dispositif.Another characteristic of the process rather dedicated to a measuring operation at the end of the production line is to measure the actual position of the machined crank pins to possibly correct for the measurement of the unbalance, the value of the equivalent torque constituted by the simulation masses of 1 linkage. This characteristic makes it possible to take into account any discrepancy between the actual position and the theoretical position of the cranks once machined. This measurement and the possible correction associated therewith are all the more useful as the reception areas of the simulation weights adopt a fixed position relative to the positioning surfaces of the device.
L'invention concerne également un dispositif permettant de mettre en œuvre le procédé précité. Ce dispositif support est remarquable en ce qu'il comprend deux flasques qui, séparés par au moins un plateau d'accueil pour un vilebrequin à mesurer comprenant des moyens de mise en position et de maintien en position, sont associés à des paliers de roulements venant en contact avec les rouleaux d'entraînement de la machine de mesure.The invention also relates to a device for implementing the aforementioned method. This support device is remarkable in that it comprises two flanges which, separated by at least one receiving plate for a crankshaft to be measured, comprising means for positioning and holding in position, are associated with rolling bearings that come into contact with the drive rollers of the machine measurement.
Divers modes de réalisation font appel, associées ou non, aux caractéristiques suivantes :Various embodiments make use of the following characteristics, whether associated or not:
- lesdits moyens de mise en position comprennent deux vés de centrage coopérant avec deux portées du vilebrequin,said positioning means comprise two centering ves cooperating with two bearing surfaces of the crankshaft,
- lesdits moyens de mise en position comprennent une butée radiale (dans le cadre d'une utilisation en fin de ligne de fabrication) ,said positioning means comprise a radial abutment (in the context of use at the end of the production line),
- lesdits moyens de mise en position comprennent un moyen de serrage concentrique d'un maneton assurant non seulement le positionnement mais également la prise de mesure du diamètre dudit maneton (dans le cadre d'une utilisation du dispositif en début de ligne de fabrication) , - le dispositif comprend un jeu de masselottes venant s'associer auxdits flasques pour simuler les masses de l'embiellage du vilebrequin porté,said positioning means comprise a concentric tightening means for a crank pin ensuring not only the positioning but also the measuring of the diameter of said crankpin (in the context of a use of the device at the beginning of the production line), the device comprises a set of flyweights associated with said flanges to simulate the masses of the crankshaft crankshaft worn,
- lesdits vés sont dimensionnés et positionnés pour rendre coaxial l'axe du vilebrequin avec l'axe des surfaces de roulement, le dispositif comprend une bride axiale assurant le maintien en position notamment lorsque les organes de localisation sont retirés,said ves are dimensioned and positioned to coax the axis of the crankshaft with the axis of the running surfaces, the device comprises an axial flange ensuring the holding in position in particular when the locating members are removed,
- lesdits moyens de mise en position comportent une pince de serrage escamotable d'un maneton qui vient ponctuellement positionner ledit maneton et assurer la mesure de son diamètre.- Said positioning means comprise a retractable clamping collet of a crankpin which ad hocly position said crankpin and ensure the measurement of its diameter.
Les concepts fondamentaux de l'invention venant d'être exposés ci-dessus dans leur forme la plus élémentaire, d'autres détails et caractéristiques ressortiront plus clairement à la lecture de la description qui suit et en regard des dessins annexés, donnant à titre d'exemple non limitatif, un mode de réalisation d'un dispositif conforme à l'invention. BRÈVE DESCRIPTION DES DESSINS La figure 1 est un dessin schématique d'une vue en perspective d'un mode de réalisation d'un dispositif conforme à l'invention accueillant un vilebrequin et disposé dans une machine à mesurer dans le cadre d'une opération de mesure en fin de ligne de fabrication, La figure 2 est une vue en perpective éclatée du dispositif de la figure 1 accueillant le vilebrequin,The basic concepts of the invention having been described above in their most basic form, other details and features will emerge more clearly on reading the description which follows and with reference to the accompanying drawings, giving by way of non-limiting example, an embodiment of a device according to the invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic drawing of a perspective view of an embodiment of a device according to the invention accommodating a crankshaft and arranged in a measuring machine in the context of an operation of measurement at the end of the manufacturing line, FIG. 2 is an exploded perspective view of the device of FIG. 1 housing the crankshaft,
La figure 3 est un dessin schématique d'une vue de dessus du dispositif,FIG. 3 is a schematic drawing of a view from above of the device,
La figure 4 est un dessin schématique d'une vue de côté en coupe du dispositif,FIG. 4 is a schematic drawing of a sectional side view of the device,
La figure 5 est un dessin schématique d'une vue de côté illustrant la localisation du maneton dans le cadre d'une opération de mesure en début de ligne de fabrication . DESCRIPTION DES MODES DE RÉALISATION PRÉFÉRÉSFigure 5 is a schematic drawing of a side view illustrating the location of the crank pin in the context of a measuring operation at the beginning of the manufacturing line. DESCRIPTION OF THE PREFERRED EMBODIMENTS
Tel qu'illustré sur le dessin de la figure 1, le dispositif référencé D dans son ensemble accueille un vilebrequin V et est disposé sur une machine référencée M de mesure dynamique du balourd. Cette machine est du type de celle accueillant les pièces à mesurer en les faisant reposer sur deux paliers ouverts constitués chacun par les contacts tangentiels offerts par une paire de rouleaux P d'entraînement qui font tourner ladite pièce par contact avec des zones de roulement prévues sur la pièce qui est ici constituée par le dispositif D. Ainsi, conformément à l'invention, le dispositif D qui est lui-même équilibré, sert d'interface mécanique entre des vilebrequins non équilibrés et une machine classique de mesure dynamique du balourd. Le dispositif support D se compose de deux plateaux longitudinaux 110 et 120 disposés en vis à vis qui relient deux flasques latéraux 210 et 220 portant chacun un arbre 310 et 320.As shown in the drawing of Figure 1, the device referenced D as a whole accommodates a crankshaft V and is arranged on a machine referenced M dynamic unbalance measurement. This machine is of the type that accommodates the parts to be measured by making them rest on two open bearings each constituted by the tangential contacts offered by a pair of driving rollers P which rotate said part by contact with rolling zones provided on the part which is here constituted by the device D. Thus, according to the invention, the device D which is itself balanced, serves as a mechanical interface between unbalanced crankshafts and a conventional machine for dynamic measurement of unbalance. The support device D consists of two longitudinal plates 110 and 120 disposed opposite each other which connect two side flanges 210 and 220 each carrying a shaft 310 and 320.
Les dits plateaux assurent le support des vés de centrage 410 et 420 coopérant avec deux portées ou surfaces cylindriques du vilebrequin ainsi que d'une butée radiale 430 nécessaire à la mise en position angulaire du vilebrequin V.The said plates provide support for the centering ves 410 and 420 cooperating with two bearings or cylindrical surfaces of the crankshaft and a radial abutment 430 necessary for the angular position of the crankshaft V.
Selon un autre mode de réalisation, le centrage est réalisé par des cônes positionnés aux extrémités du vilebrequin.According to another embodiment, the centering is achieved by cones positioned at the ends of the crankshaft.
Le maintien en position est avantageusement réalisé par un serrage axial. Ainsi, comme illustré, un des flasques est équipé dans l'axe du vilebrequin et sur sa face intérieure, d'une butée axiale 221 assurant le positionnement axial du vilebrequin. A des fins de serrage, cette butée axiale 221 coopère avec une bride axiale 211 équipant l'autre flasque 210 et qui vient réaliser un effort de maintien dans l'axe du vilebrequin V et donc du dispositif D. Cette bride est coaxiale à l'arbre 310 et comporte une partie qui coulisse dans ce dernier pour permettre sa commande de l'extérieur du dispositif. Le dispositif de commande 700 de la bride apparaît sur le dessin de la figure 1. Selon un choix technologique évitant toute intervention extérieure au dispositif pendant l'opération de mesure, grâce a un système à ressort la bride reste au repos en position de bridage, le dispositif de commande n'activant que le débridage .The holding in position is advantageously achieved by axial clamping. Thus, as illustrated, one of the flanges is equipped in the axis of the crankshaft and on its inner face, an axial stop 221 ensuring the axial positioning of the crankshaft. For the purpose of tightening, this axial abutment 221 cooperates with an axial flange 211 fitted to the other flange 210 and which makes a holding force in the axis of the crankshaft V and thus the device D. This flange is coaxial with the shaft 310 and has a portion which slides in the latter to allow its control of the outside of the device. The control device 700 of the flange appears in the drawing of FIG. 1. According to a technological choice avoiding any intervention external to the device during the measuring operation, thanks to a spring system the flange remains at rest in the clamping position, the control device activating only the unclamping.
Les arbres 310 et 320 supportent les surfaces cylindriques 311 et 321 qui vont servir de surfaces de roulement dans la machine M. En outre, lesdits flasques sont ménagés de façon à accueillir des moyens de réglage de type masselotte afin de reproduire les masses de l'embiellage auxquelles est lié le vilebrequin à mesurer. Ainsi, les alésages 500 pratiqués dans les flasques permettent l'accueil et la fixation de masselottes dont la masse, le positionnement et le balourd que leur positionnement crée permet de reproduire ledit embiellage.The shafts 310 and 320 support the cylindrical surfaces 311 and 321 which will serve as rolling surfaces in the machine M. In addition, said flanges are arranged to accommodate feeder type adjustment means to reproduce the masses of the machine. linkage to which is connected the crankshaft to measure. Thus, the bores 500 made in the flanges allow the reception and fixing of weights whose mass, positioning and unbalance that their positioning creates allows to reproduce said linkage.
La figure 5 illustre la localisation du maneton m dans le cadre d'une opération de mesure en début de ligne de fabrication. Pour ce faire, lesdits moyens de mise en position comportent une pince de serrage concentrique 600 du maneton m qui vient positionner ledit maneton m et assurer la mesure de son diamètre. Cette pince est retirée une fois la mesure réalisée afin de ne pas gêner la rotation du dispositif D. Ce paramètre dans le cadre d'une opération de mesure du balourd en début de ligne est obtenue sur une surface brute et permet de définir le décalage éventuel entre la masse théorique des manetons à partir duquel est défini le positionnement et la masse des masselottes et leur masse réelle définie par la prise de mesure de leur diamètre de sorte que la mesure du balourd puisse prendre en compte ledit décalage.FIG. 5 illustrates the location of the crankpin m as part of a measuring operation at the beginning of the production line. To do this, said positioning means comprise a concentric clamping clamp 600 of the crankpin m which is positioned said crankpin m and ensure the measurement of its diameter. This clamp is removed once the measurement is made so as not to hinder the rotation of the device D. This parameter in the context of an unbalance measurement operation at the beginning of the line is obtained on a gross surface and allows to define the possible offset between the theoretical mass of the crank pins from which is defined the positioning and the mass of the flyweights and their actual mass defined by taking measurement of their diameter so that the measurement of unbalance can take into account said shift.
On comprend que le dispositif, qui vient d'être ci- dessus décrit et représenté, l'a été en vue d'une divulgation plutôt que d'une limitation. Bien entendu, divers aménagements, modifications et améliorations pourront être apportés à l'exemple ci-dessus, sans pour autant sortir du cadre de l'invention. It is understood that the device, which has just been described above and shown, has been for the purpose of disclosure rather than limitation. Of course, various arrangements, modifications and improvements may be made to the example above, without departing from the scope of the invention.
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0855954A FR2935799B1 (en) | 2008-09-05 | 2008-09-05 | METHOD AND DEVICE FOR MEASURING CRANKSHAFT BALANCE |
| FR0855954 | 2008-09-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2010026319A1 true WO2010026319A1 (en) | 2010-03-11 |
Family
ID=40521604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2009/051260 Ceased WO2010026319A1 (en) | 2008-09-05 | 2009-06-30 | Method and device for measuring crankshaft imbalance |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR2935799B1 (en) |
| WO (1) | WO2010026319A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519673A (en) * | 2011-11-30 | 2012-06-27 | 中国北车集团大连机车车辆有限公司 | Adjustment method of height of dynamic balance test transmission center of crank shaft |
| CN115389103A (en) * | 2022-10-08 | 2022-11-25 | 滨州鲁德曲轴有限责任公司 | Special-shaped crankshaft dynamic balance measuring device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4334244A1 (en) * | 1993-10-07 | 1995-04-13 | Schenck Ag Carl | Method and device for balancing different system unbalances in the balancing of rotors having asymmetrical mass distribution |
| EP1870181A1 (en) * | 2006-06-22 | 2007-12-26 | Peugeot Citroen Automobiles SA | Method of manufacturing a crankshaft |
-
2008
- 2008-09-05 FR FR0855954A patent/FR2935799B1/en not_active Expired - Fee Related
-
2009
- 2009-06-30 WO PCT/FR2009/051260 patent/WO2010026319A1/en not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4334244A1 (en) * | 1993-10-07 | 1995-04-13 | Schenck Ag Carl | Method and device for balancing different system unbalances in the balancing of rotors having asymmetrical mass distribution |
| EP1870181A1 (en) * | 2006-06-22 | 2007-12-26 | Peugeot Citroen Automobiles SA | Method of manufacturing a crankshaft |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519673A (en) * | 2011-11-30 | 2012-06-27 | 中国北车集团大连机车车辆有限公司 | Adjustment method of height of dynamic balance test transmission center of crank shaft |
| CN115389103A (en) * | 2022-10-08 | 2022-11-25 | 滨州鲁德曲轴有限责任公司 | Special-shaped crankshaft dynamic balance measuring device |
| CN115389103B (en) * | 2022-10-08 | 2023-01-13 | 滨州鲁德曲轴有限责任公司 | Special-shaped crankshaft dynamic balance measuring device |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2935799A1 (en) | 2010-03-12 |
| FR2935799B1 (en) | 2010-09-03 |
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