EP1820647B1 - Machine and method for marking hollow components - Google Patents

Machine and method for marking hollow components Download PDF

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Publication number
EP1820647B1
EP1820647B1 EP07356021.1A EP07356021A EP1820647B1 EP 1820647 B1 EP1820647 B1 EP 1820647B1 EP 07356021 A EP07356021 A EP 07356021A EP 1820647 B1 EP1820647 B1 EP 1820647B1
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EP
European Patent Office
Prior art keywords
marking
mandrel
camera
marked
manipulator
Prior art date
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EP07356021.1A
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German (de)
French (fr)
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EP1820647A2 (en
EP1820647A3 (en
Inventor
Marco Paita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Illinois Tool Works Inc
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Illinois Tool Works Inc
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Publication date
Application filed by Illinois Tool Works Inc filed Critical Illinois Tool Works Inc
Priority to PL07356021T priority Critical patent/PL1820647T3/en
Publication of EP1820647A2 publication Critical patent/EP1820647A2/en
Publication of EP1820647A3 publication Critical patent/EP1820647A3/en
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Publication of EP1820647B1 publication Critical patent/EP1820647B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0036—Devices for scanning or checking the printed matter for quality control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/08—Machines
    • B41F15/0872—Machines for printing on articles having essentially cylindrical surfaces
    • B41F15/0877—Machines for printing on articles having essentially cylindrical surfaces of varying cross-section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F17/00—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for
    • B41F17/08—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for for printing on filamentary or elongated articles, or on articles with cylindrical surfaces
    • B41F17/14—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for for printing on filamentary or elongated articles, or on articles with cylindrical surfaces on articles of finite length
    • B41F17/18—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for for printing on filamentary or elongated articles, or on articles with cylindrical surfaces on articles of finite length on curved surfaces of articles of varying cross-section, e.g. bottles, lamp glasses

Definitions

  • the present invention relates to a machine for marking shaped parts and to a method for marking shaped parts and for controlling the quality of their marking.
  • a shaped piece is an at least partially tubular piece with a non-circular cross section.
  • a marking machine comprising a marking member, such as a flat punch or a screen-printing doctor, and at least one mandrel for supporting the parts for their marking by this organ. marking.
  • FR-A-2,633,062 in the case of circular cross-section parts, to integrate in a marking machine a device for checking the quality of the marking of the parts. More specifically, this document discloses a screen printing marking machine comprising two separate positions, intended respectively for marking and quality control. In these two stations, the part to be marked or controlled is rotated about its central axis. Marking is achieved by moving a screen screen relative to the surface of the part to be marked.
  • the control of the quality of the marking takes place by moving a camera relative to the marked surface of the part to be controlled, so that the camera reads each marking line of the part.
  • the motion to be communicated to the camera is relatively simple. However, this movement quickly becomes complex in the case of parts whose marked surface has variations in radius of curvature.
  • the invention intends to remedy more particularly by proposing a machine for marking shaped parts allowing effectively control the quality of the parts marking, using a camera whose movement relative to the marked surface of the parts is simple, whatever the profile of the parts.
  • the subject of the invention is a machine for marking shaped parts, comprising a marking member intended to be in contact in at least one line of tangency with a piece of shape for its marking, as well as a first and a second mandrel able to support respectively a first piece to be marked and a second piece previously marked on the first mandrel by the marking member, a control camera being disposed at a focal distance from the marked surface of the second piece, characterized in that that the first mandrel is able to move the first piece relative to the marking member, in rotation about an axis and in translation parallel to two axes perpendicular to each other and to the axis of rotation, the movement of the second mandrel being slaved and identical to that of the first mandrel and the camera being able to move parallel to and synchronously with the line of tangency between the marking member and the first piece.
  • each image acquired by the camera is advantageously corrected to take account of relative vibrations of the second mandrel and the camera.
  • the marking machine 1 comprises a main frame 3 which supports a marking head 5 provided with a flat punch 51 fixed.
  • a marking tape 53 is provided to be unrolled opposite the punch 51, by means of two coils 55.
  • the machine 1 also comprises two mandrels 12 and 14 for supporting the parts 2.
  • the upstream mandrel 12 is intended to receive a part 2 , for marking by the marking head 5, while the downstream mandrel 14 is intended to receive a marked part 2, in order to control the quality of its marking.
  • the two mandrels 12 and 14 are pivotally mounted on the same support 16 movable relative to the frame 3 parallel to two perpendicular translation axes Y 16 and Z 16 , respectively horizontal and vertical.
  • the support 16 is moved relative to the frame 3 by means of an actuator of known type, not shown in the figures.
  • Each of the mandrels 12 or 14 has a pivot axis R 12 or R 14 , oriented perpendicularly to the plane defined by the axes Y 16 and Z 16 .
  • the upstream mandrel 12 is rotated about the axis R 12 by a drive shaft 121.
  • the upstream mandrel 12, associated with the marking head 5 is able to move the part 2 that it supports by relative to the punch 51 fixed for its marking. More specifically, the part 2 is able to roll substantially without sliding under the punch 51 and to move relative to the punch 51 in the direction of the axes Y 16 and Z 16 .
  • the tangential velocity of the part 2 to be marked with respect to the punch 51 is substantially constant during marking. She can however be modulated according to the local radius of curvature of the part 2 to be marked.
  • the downstream mandrel 14 is rotatably supported by a shaft 141, connected to the drive shaft 121 of the upstream mandrel 12 by a transmission belt 18.
  • the rotation of the downstream mandrel 14 about the axis R 14 is slaved to that of the upstream mandrel 12 about the axis R 12 .
  • the mandrels 12 and 14 being both supported by and integral in translation of the support 16, the movement of the downstream mandrel 14 is therefore identical to that of the upstream mandrel 12.
  • the marking machine 1 comprises three manipulators 4, 6 and 8 fixed on the frame 3 and intended for loading and unloading the mandrels 12 and 14.
  • the upstream manipulator 4 is intended to load on the upstream mandrel 12 a part 2 to mark
  • the downstream manipulator 8 is intended to discharge the downstream mandrel 14 a marked part 2 whose marking has been controlled.
  • the manipulators 4 and 8 are of the type described in FR-A-2,853,274 .
  • the intermediate manipulator 6 is intended for the transfer of a part 2, which has been marked on the upstream mandrel 12, towards the downstream mandrel 14, in order to control the quality of its marking.
  • This transfer manipulator 6 is known per se. As visible at figure 2 , it comprises a retractable arm 61 slidably mounted relative to the frame 3 and one end of which is provided with a suction cup 63 for gripping the parts 2.
  • the manipulator 6 also comprises a jack 65, able to slide the arm 61 along its longitudinal direction X 61 which, in the example shown, is substantially horizontal and perpendicular to the plane defined by the axes Y 16 and Z 16 .
  • the manipulator 6 transfers each piece 2, once marked, from the upstream mandrel 12 to the downstream mandrel 14. After having grasped a piece 2 marked on the upstream mandrel 12, then removed from this mandrel 12, the manipulator 6 waits for the downstream mandrel 14 to be placed in the axis of this piece 2, by translation of the support 16 relative to 3. When this is the case, the manipulator 6 moves this piece 2 to the downstream mandrel 14 and the loose when it is threaded on the mandrel 14. The manipulator 6 is then placed in the waiting position, at the distance of the trajectories of the mandrels 12 and 14. During its transfer between the mandrels 12 and 14, each part 2 is thus translated along its central axis, in one direction and then in the opposite direction.
  • the vertical axis Z 6 represents the position of the manipulator 6.
  • the spacing between the upstream manipulator 4 and the transfer manipulator 6, on the one hand, and the spacing between the transfer manipulator 6 and the downstream manipulator 8, on the other hand, are adjustable.
  • the spacing between each pair of manipulators is chosen equal to the spacing e between the mandrels 12 and 14.
  • the marking machine 1 is also provided with a linear camera 7 intended to control the quality of marking of a marked part 2 carried by the downstream mandrel 14.
  • the camera 7 may be of the type marketed by the company DALSA under the reference SPYDER 2 2048 points. It may also be of another type, in particular of the type provided for in FR-A-2,633,062 .
  • This camera 7 is supported by a carriage 9 slidably mounted relative to the frame 3 in a direction D 9 parallel to the axis Y 16 .
  • the carriage 9 is provided to move the camera 7 so that its reading line coincides permanently, during the control of the quality of the marking of a part 2 carried by the downstream mandrel 14, with the marked surface of this part 2.
  • the camera 7 is disposed at a distance corresponding to its focal length f with respect to the outer surface 21 of a part 2A carried by the downstream mandrel 14, the part 2A having been previously marked on the upstream mandrel 12 by the punch 51
  • the camera 7 is moved by the carriage 9 parallel to and synchronously with the line L of tangency between the punch 51 and the outer surface 21 of a part 2B being marked on the upstream mandrel 12.
  • This line of tangency is perpendicular to the plane of the figure 4 and represented in this figure by a point corresponding to its intersection with the plane of this figure.
  • the marking machine 1 makes it possible to control the marking quality of the pieces 2 with a simple movement of the camera 7, this movement being limited to a translation parallel to the Y axis 16 . This is also the case for parts of more complex shape, such as for example polygonal cross section pieces.
  • the movement of the camera 7 and the frequency of the shots are defined by an encoder, not shown.
  • the recording frequency of the camera 7 is constantly adapted to the running speed of the marked surface 21 of the marked part 2A, this speed being equal to the tangential speed with respect to the punch 51 of the part 2B being marking on the upstream mandrel 12.
  • the frequency of shooting increases as the tangential speed of the part 2B relative to the punch 51 increases.
  • the support 16 comprises a reinforcing square 161 in the vicinity of the mandrel 14.
  • the residual vibrations of the mandrel 14 during of its displacement are recorded and subtracted from the images acquired by the camera 7, in order to obtain corrected images.
  • the vibrations of the camera 7 can be taken into account on its carriage 9.
  • the marking machine 1 comprises an electronic control and control unit, not shown, which controls its operation.
  • this unit controls the manipulators 4, 6 and 8 and the operating means of the mandrel 12, the support 16 and the carriage 9, from information from sensors, also not shown for the sake of clarity.
  • a method of marking a shaped part 2B and checking the quality of its marking by means of the marking machine 1 comprises steps as described below, with reference to Figures 3 to 7 :
  • the upstream manipulator 4 and the transfer manipulator 6 respectively place, and substantially simultaneously, a part 2B to be marked on the upstream mandrel 12 and a previously marked part 2A on the downstream mandrel 14.
  • the support 16 is in a first position visible to the figure 3 , in which the upstream mandrel 12 is positioned upstream and below the punch 51, in the vicinity of the upstream end of the punch 51.
  • the upstream mandrel 12 is then driven in translation by the support 16 parallel to the axes Y 16 and Z 16 and in rotation about the axis R 12 , so as to move the workpiece 2B with respect to punch 51 for its marking, as visible in FIG. figure 4 .
  • the part 2B is marked by rolling relative to the punch 51, which corresponds to a displacement of the support 16 from its first position, visible to the figure 3 , to a second position, visible to the figure 5 . During this marking, the punch 51 bears on the surface 21 of the part 2B along the line of tangency L.
  • the part 2A carried by the downstream mandrel 14 and previously marked on the upstream mandrel 12, is displaced by the downstream mandrel 14 relative to the camera 7 for the control of the quality of its marking.
  • the movement of the downstream mandrel 14 is slaved to that of the upstream mandrel 12, in translation thanks to the support 16 which simultaneously moves the two mandrels in the plane of the axes Y 16 and Z 16 , and in rotation thanks to the belt 18 which drives the mandrel 14 in rotation about the axis R 14 simultaneously with the rotation of the mandrel 12 about the axis R 12 .
  • the control of the quality of the marking of the part 2A takes place by moving the camera 7 parallel to and synchronously with the line of tangency L, thanks to the carriage 9.
  • the movements of the support 16 are represented by the double arrows F y and F z at the figure 4
  • the corresponding and simultaneous movements of the carriage 9 of the camera 7 are represented by the arrow F ' y .
  • the camera 7 is held at a focal distance f of the marked surface of the part 2A during the inspection, as visible in FIG. figure 4 .
  • each image acquired by the camera 7 is corrected to take into account any relative vibrations of the downstream mandrel 14 and the camera 7, which ensures reliability and reliability. accuracy of the control of the quality of the marking of the part 2A carried by the mandrel 14.
  • the support 16 When the marking of the part 2B carried by the upstream mandrel 12 and the simultaneous control of the quality of the marking of the part 2A have taken place, the support 16 is in its second position, visible at the figure 5 . In this position of the support 16, the transfer manipulator 6 and downstream 8 are able to respectively discharge, and substantially simultaneously, the mandrels 12 and 14. More specifically, the downstream manipulator 8 transfers the part 2A, the marking has been controlled to be satisfactory by means of the camera 7, the downstream mandrel 14 to a receptacle or evacuation conveyor marked parts, not shown in the figures. Simultaneously, the transfer manipulator 6 grasps the part 2B and removes it from the upstream mandrel 12.
  • the support 16 is then brought back from its second position to its first position. In this step, and as visible at figure 6 the mandrels 12 and 14 carry no parts and the part 2B is carried by the transfer manipulator 6.
  • the upstream manipulator 4 and the transfer manipulator 6 respectively place, and substantially simultaneously, a part 2C to be marked on the upstream mandrel 12 and the marked part 2B on the downstream mandrel 14.
  • the quality control of the marking of the part 2B then takes place simultaneously with the marking of the part 2C, by repetition of the steps of the Figures 3 to 6 the piece 2A being replaced by the piece 2B and the piece 2B by the piece 2C.
  • the marking machine 1 thus allows both the marking of shaped parts 2 and the quality control of their marking. Movement relative of the camera 7 and the controlled part 2, carried by the downstream mandrel 14, keeps the camera 7 at a focal distance f of the marked surface of the part 2 during the control and thus to ensure a reliable control of the marking. Taking into account the relative vibrations of the mandrel 14 and the camera 7 to correct the images acquired by the camera 7 contributes to the accuracy of the quality control.
  • the slaving of the movement of the downstream mandrel 14 to that of the upstream mandrel 12, by means of the support 16 and the belt 18, makes it possible to obtain a machine for marking and quality control of the compact marking, in particular more compact and economical than two machines juxtaposed one of which would be dedicated to the marking and the other to control the quality of the marking.
  • the movement of the camera 7 for the control of the marked surface of the parts 2 is effected in a single direction, thanks to the displacement of the part 2 marked by the mandrel 14 both in rotation and in translation in two directions.
  • the planar punch 51 may be replaced by a screen printing squeegee associated with a screen printing screen.
  • the upstream mandrel 12 moves a piece of shape 2 to be marked under the screen printing screen in a similar manner to the case of the plane punch, the line of tangency between the screen printing doctor and the part 2 to be marked then corresponding to a line of the serigraphy doctor blade oriented parallel to the axis of rotation R 12 of the part 2 to be marked.
  • the control of the marking quality of a marked part 2 carried by the downstream mandrel 14, whose movement is slaved to that of the upstream mandrel 12, takes place, as in the case of the plane punch, by moving the camera 7 in parallel.
  • the movement of the camera 7 is in this case a translational movement along an axis parallel to the Y axis 16 of the figure 1 .
  • the serigraphy squeegee and the camera 7 are moved by a same carriage in translation parallel to the axis Y 16 .

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Mechanical Engineering (AREA)
  • Printing Methods (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Description

La présente invention a trait à une machine de marquage de pièces de forme et à un procédé de marquage de pièces de forme et de contrôle de la qualité de leur marquage.The present invention relates to a machine for marking shaped parts and to a method for marking shaped parts and for controlling the quality of their marking.

Au sens de l'invention, une pièce de forme est une pièce au moins partiellement tubulaire à section transversale non circulaire.Within the meaning of the invention, a shaped piece is an at least partially tubular piece with a non-circular cross section.

Pour marquer des pièces de forme, il est connu d'utiliser une machine de marquage comportant un organe de marquage, tel qu'un poinçon plan ou une racle de sérigraphie, et au moins un mandrin de support des pièces pour leur marquage par cet organe de marquage. Par ailleurs, il est connu de FR-A-2 633 062 , dans le cas de pièces à section transversale circulaire, d'intégrer à une machine de marquage un dispositif de contrôle de la qualité du marquage des pièces. Plus spécifiquement, ce document divulgue une machine de marquage par sérigraphie comportant deux postes distincts, destinés respectivement au marquage et au contrôle qualité. Dans ces deux postes, la pièce à marquer ou à contrôler est entraînée en rotation autour de son axe central. Le marquage est réalisé en déplaçant un écran de sérigraphie par rapport à la surface de la pièce à marquer. Le contrôle de la qualité du marquage a lieu par déplacement d'une caméra par rapport à la surface marquée de la pièce à contrôler, afin que la caméra lise chaque ligne de marquage de la pièce. Dans le cas de pièces à section transversale circulaire, le mouvement à communiquer à la caméra est relativement simple. Cependant, ce mouvement devient rapidement complexe dans le cas de pièces dont la surface marquée présente des variations de rayon de courbure.To mark shaped parts, it is known to use a marking machine comprising a marking member, such as a flat punch or a screen-printing doctor, and at least one mandrel for supporting the parts for their marking by this organ. marking. Moreover, it is known to FR-A-2,633,062 in the case of circular cross-section parts, to integrate in a marking machine a device for checking the quality of the marking of the parts. More specifically, this document discloses a screen printing marking machine comprising two separate positions, intended respectively for marking and quality control. In these two stations, the part to be marked or controlled is rotated about its central axis. Marking is achieved by moving a screen screen relative to the surface of the part to be marked. The control of the quality of the marking takes place by moving a camera relative to the marked surface of the part to be controlled, so that the camera reads each marking line of the part. In the case of circular cross-section pieces, the motion to be communicated to the camera is relatively simple. However, this movement quickly becomes complex in the case of parts whose marked surface has variations in radius of curvature.

C'est à cet inconvénient qu'entend plus particulièrement remédier l'invention en proposant une machine de marquage de pièces de forme permettant de contrôler efficacement la qualité du marquage des pièces, à l'aide d'une caméra dont le mouvement par rapport à la surface marquée des pièces est simple, quel que soit le profil des pièces.It is this disadvantage that the invention intends to remedy more particularly by proposing a machine for marking shaped parts allowing effectively control the quality of the parts marking, using a camera whose movement relative to the marked surface of the parts is simple, whatever the profile of the parts.

Document EP-A1-0 999 047 décrit un procédé selon la préambule de la revendication 8.Document EP-A1-0 999 047 describes a method according to the preamble of claim 8.

A cet effet, l'invention a pour objet une machine de marquage de pièces de forme, comprenant un organe de marquage destiné à être en contact en au moins une ligne de tangence avec une pièce de forme pour son marquage, ainsi qu'un premier et un deuxième mandrins aptes à supporter respectivement une première pièce à marquer et une deuxième pièce préalablement marquée sur le premier mandrin par l'organe de marquage, une caméra de contrôle étant disposée à distance focale de la surface marquée de la deuxième pièce, caractérisée en ce que le premier mandrin est apte à déplacer la première pièce par rapport à l'organe de marquage, en rotation autour d'un axe et en translation parallèlement à deux axes perpendiculaires entre eux et à l'axe de rotation, le mouvement du deuxième mandrin étant asservi et identique à celui du premier mandrin et la caméra étant apte à se déplacer parallèlement à et de manière synchronisée avec la ligne de tangence entre l'organe de marquage et la première pièce.For this purpose, the subject of the invention is a machine for marking shaped parts, comprising a marking member intended to be in contact in at least one line of tangency with a piece of shape for its marking, as well as a first and a second mandrel able to support respectively a first piece to be marked and a second piece previously marked on the first mandrel by the marking member, a control camera being disposed at a focal distance from the marked surface of the second piece, characterized in that that the first mandrel is able to move the first piece relative to the marking member, in rotation about an axis and in translation parallel to two axes perpendicular to each other and to the axis of rotation, the movement of the second mandrel being slaved and identical to that of the first mandrel and the camera being able to move parallel to and synchronously with the line of tangency between the marking member and the first piece.

Selon d'autres caractéristiques avantageuses de l'invention :

  • la vitesse tangentielle de la première pièce par rapport à l'organe de marquage est sensiblement constante ;
  • la fréquence des prises de vue de la caméra dépend de la vitesse tangentielle de la première pièce par rapport à l'organe de marquage ;
  • les premier et deuxième mandrins sont montés sur un même support qui les déplace parallèlement aux axes de translation précités ;
  • la machine de marquage comprend des moyens de synchronisation en rotation des premier et deuxième mandrins ;
  • la machine de marquage comporte un manipulateur de transfert de pièces entre les premier et deuxième mandrins, le support étant mobile entre une deuxième position dans laquelle le manipulateur est apte à décharger une pièce du premier mandrin et une première position dans laquelle le manipulateur est apte à charger la pièce sur le deuxième mandrin ;
  • l'organe de marquage est un poinçon plan ou une racle de sérigraphie.
According to other advantageous features of the invention:
  • the tangential velocity of the first piece relative to the marking member is substantially constant;
  • the frequency of the camera shots depends on the tangential speed of the first piece relative to the marking member;
  • the first and second mandrels are mounted on the same support which moves them parallel to the aforementioned translation axes;
  • the marking machine comprises means for synchronizing in rotation the first and second mandrels;
  • the marking machine comprises a transfer manipulator parts between the first and second mandrels, the support being movable between a second position in which the manipulator is able to unload a piece of the first mandrel and a first position in which the manipulator is able to load the workpiece on the second chuck;
  • the marking member is a planar punch or a serigraphy squeegee.

L'invention a également pour objet un procédé de marquage d'une pièce de forme et de contrôle de la qualité de son marquage, caractérisé en ce qu'il comprend des étapes dans lesquelles :

  • un organe de marquage marque la pièce, la pièce étant déplacée par rapport à l'organe de marquage par un premier mandrin, en rotation autour d'un axe et en translation parallèlement à deux axes perpendiculaires entre eux et à l'axe de rotation ;
  • une caméra contrôle la qualité du marquage de la pièce en se déplaçant à distance focale de la surface marquée de la pièce, la pièce étant déplacée par un deuxième mandrin dont le mouvement est identique à celui du premier mandrin.
The subject of the invention is also a method of marking a workpiece of form and quality control of its marking, characterized in that it comprises steps in which:
  • a marking member marks the workpiece, the workpiece being moved relative to the marking member by a first mandrel, rotating about an axis and in translation parallel to two axes perpendicular to each other and to the axis of rotation;
  • a camera controls the quality of the marking of the workpiece by moving at a focal distance from the marked surface of the workpiece, the workpiece being moved by a second mandrel whose movement is identical to that of the first mandrel.

Un tel procédé peut comprendre des étapes dans lesquelles :

  • lors du marquage de la pièce par l'organe de marquage, un support, auquel sont reliés les premier et deuxième mandrins, se déplace parallèlement aux deux axes de translation, depuis une première position vers une deuxième position ;
  • la pièce est déchargée du premier mandrin par un manipulateur de transfert de la pièce entre les premier et deuxième mandrins, ce manipulateur étant apte à décharger la pièce du premier mandrin dans la deuxième position du support et à charger la pièce sur le deuxième mandrin dans la première position du support ;
  • le support se déplace depuis la deuxième position vers la première position ;
  • le manipulateur charge la pièce sur le deuxième mandrin ;
  • la caméra contrôle la qualité du marquage de la pièce portée par le deuxième mandrin.
Such a method may comprise steps in which:
  • when marking the piece by the marking member, a support, to which are connected the first and second mandrels, moves parallel to the two translation axes, from a first position to a second position;
  • the workpiece is unloaded from the first mandrel by a transfer manipulator of the workpiece between the first and second mandrels, the manipulator being able to unload the workpiece of the first mandrel in the second position of the support and to load the workpiece on the second mandrel in the first position of the support;
  • the support moves from the second position to the first position;
  • the manipulator loads the workpiece on the second mandrel;
  • the camera controls the quality of the marking of the part carried by the second mandrel.

En outre, chaque image acquise par la caméra est avantageusement corrigée pour tenir compte de vibrations relatives du deuxième mandrin et de la caméra.In addition, each image acquired by the camera is advantageously corrected to take account of relative vibrations of the second mandrel and the camera.

Les caractéristiques et avantages de l'invention apparaîtront dans la description qui va suivre d'un mode de réalisation d'une machine de marquage de pièces de forme selon l'invention, donnée uniquement à titre d'exemple et faite en se référant aux dessins annexés dans lesquels :

  • la figure 1 est une vue en perspective d'une machine de marquage de pièces de forme conforme à l'invention, préalablement au marquage et au contrôle qualité ;
  • la figure 2 est une vue en perspective d'un manipulateur de transfert appartenant à la machine de la figure 1 ;
  • les figures 3 à 7 sont des vues de face schématiques partielles de certains éléments de la machine de la figure 1 montrant des étapes successives d'un procédé de marquage de pièces de forme et de contrôle de la qualité de leur marquage conforme à l'invention.
The features and advantages of the invention will appear in the following description of an embodiment of a form-marking machine according to the invention, given solely by way of example and with reference to the drawings. annexed in which:
  • the figure 1 is a perspective view of a form marking machine of the form according to the invention, prior to marking and quality control;
  • the figure 2 is a perspective view of a transfer manipulator belonging to the machine of the figure 1 ;
  • the Figures 3 to 7 are partial schematic front views of some elements of the machine the figure 1 showing successive steps of a method of marking shape parts and quality control of their marking according to the invention.

Sur la figure 1 est représentée une machine 1 de marquage de pièces de forme, qui sont des capuchons 2 de forme ovale non représentés sur la figure 1 pour une meilleure visibilité. Dans cette description, les termes « amont » et « aval » se réfèrent au sens de progression des pièces 2 sur la machine 1. La machine de marquage 1 comporte un bâti principal 3 qui supporte une tête de marquage 5 pourvue d'un poinçon plan 51 fixe. Un ruban 53 de marquage est prévu pour être déroulé en regard du poinçon 51, au moyen de deux bobines 55. La machine 1 comporte également deux mandrins 12 et 14 de support des pièces 2. Le mandrin amont 12 est destiné à recevoir une pièce 2, en vue de son marquage par la tête de marquage 5, alors que le mandrin aval 14 est destiné à recevoir une pièce 2 marquée, en vue du contrôle de la qualité de son marquage.On the figure 1 there is shown a machine 1 for marking shaped parts, which are caps 2 of oval shape not shown on the figure 1 for better visibility. In this description, the terms "upstream" and "downstream" refer to the direction of progression of the parts 2 on the machine 1. The marking machine 1 comprises a main frame 3 which supports a marking head 5 provided with a flat punch 51 fixed. A marking tape 53 is provided to be unrolled opposite the punch 51, by means of two coils 55. The machine 1 also comprises two mandrels 12 and 14 for supporting the parts 2. The upstream mandrel 12 is intended to receive a part 2 , for marking by the marking head 5, while the downstream mandrel 14 is intended to receive a marked part 2, in order to control the quality of its marking.

Les deux mandrins 12 et 14 sont montés à pivotement sur un même support 16 mobile par rapport au bâti 3 parallèlement à deux axes de translation perpendiculaires Y16 et Z16, respectivement horizontal et vertical. Le support 16 est déplacé par rapport au bâti 3 au moyen d'un actionneur de type connu, non représenté sur les figures. Chacun des mandrins 12 ou 14 a un axe de pivotement R12 ou R14, orienté perpendiculairement au plan défini par les axes Y16 et Z16.The two mandrels 12 and 14 are pivotally mounted on the same support 16 movable relative to the frame 3 parallel to two perpendicular translation axes Y 16 and Z 16 , respectively horizontal and vertical. The support 16 is moved relative to the frame 3 by means of an actuator of known type, not shown in the figures. Each of the mandrels 12 or 14 has a pivot axis R 12 or R 14 , oriented perpendicularly to the plane defined by the axes Y 16 and Z 16 .

Le mandrin amont 12 est entraîné en rotation autour de l'axe R12 par un arbre d'entraînement 121. Ainsi, le mandrin amont 12, associé à la tête de marquage 5, est apte à déplacer la pièce 2 qu'il supporte par rapport au poinçon 51 fixe en vue de son marquage. Plus spécifiquement, la pièce 2 est à même de rouler sensiblement sans glissement sous le poinçon 51 et de se déplacer par rapport au poinçon 51 selon la direction des axes Y16 et Z16. La vitesse tangentielle de la pièce 2 à marquer par rapport au poinçon 51 est sensiblement constante au cours du marquage. Elle peut toutefois être modulée en fonction du rayon de courbure local de la pièce 2 à marquer.The upstream mandrel 12 is rotated about the axis R 12 by a drive shaft 121. Thus, the upstream mandrel 12, associated with the marking head 5, is able to move the part 2 that it supports by relative to the punch 51 fixed for its marking. More specifically, the part 2 is able to roll substantially without sliding under the punch 51 and to move relative to the punch 51 in the direction of the axes Y 16 and Z 16 . The tangential velocity of the part 2 to be marked with respect to the punch 51 is substantially constant during marking. She can however be modulated according to the local radius of curvature of the part 2 to be marked.

Le mandrin aval 14 est supporté en rotation par un arbre 141, relié à l'arbre d'entraînement 121 du mandrin amont 12 par une courroie de transmission 18. Ainsi, la rotation du mandrin aval 14 autour de l'axe R14 est asservie à celle du mandrin amont 12 autour de l'axe R12. Les mandrins 12 et 14 étant tous deux supportés par et solidaires en translation du support 16, le mouvement du mandrin aval 14 est donc identique à celui du mandrin amont 12.The downstream mandrel 14 is rotatably supported by a shaft 141, connected to the drive shaft 121 of the upstream mandrel 12 by a transmission belt 18. Thus, the rotation of the downstream mandrel 14 about the axis R 14 is slaved to that of the upstream mandrel 12 about the axis R 12 . The mandrels 12 and 14 being both supported by and integral in translation of the support 16, the movement of the downstream mandrel 14 is therefore identical to that of the upstream mandrel 12.

La machine de marquage 1 comporte trois manipulateurs 4, 6 et 8 fixés sur le bâti 3 et destinés au chargement et au déchargement des mandrins 12 et 14. Le manipulateur amont 4 a pour vocation de charger sur le mandrin amont 12 une pièce 2 à marquer, alors que le manipulateur aval 8 a pour vocation de décharger du mandrin aval 14 une pièce 2 marquée dont le marquage a été contrôlé. Dans l'exemple représenté, les manipulateurs 4 et 8 sont du type décrit dans FR-A-2 853 274 .The marking machine 1 comprises three manipulators 4, 6 and 8 fixed on the frame 3 and intended for loading and unloading the mandrels 12 and 14. The upstream manipulator 4 is intended to load on the upstream mandrel 12 a part 2 to mark , while the downstream manipulator 8 is intended to discharge the downstream mandrel 14 a marked part 2 whose marking has been controlled. In the example shown, the manipulators 4 and 8 are of the type described in FR-A-2,853,274 .

Le manipulateur intermédiaire 6 est destiné au transfert d'une pièce 2, qui a été marquée sur le mandrin amont 12, vers le mandrin aval 14, en vue du contrôle de la qualité de son marquage. Ce manipulateur de transfert 6 est connu en soi. Comme visible à la figure 2, il comporte un bras rétractable 61 monté à coulissement par rapport au bâti 3 et dont l'une des extrémités est pourvue d'une ventouse 63 de préhension des pièces 2. Le manipulateur 6 comporte également un vérin 65, apte à faire coulisser le bras 61 selon sa direction longitudinale X61 qui, dans l'exemple représenté, est sensiblement horizontale et perpendiculaire au plan défini par les axes Y16 et Z16.The intermediate manipulator 6 is intended for the transfer of a part 2, which has been marked on the upstream mandrel 12, towards the downstream mandrel 14, in order to control the quality of its marking. This transfer manipulator 6 is known per se. As visible at figure 2 , it comprises a retractable arm 61 slidably mounted relative to the frame 3 and one end of which is provided with a suction cup 63 for gripping the parts 2. The manipulator 6 also comprises a jack 65, able to slide the arm 61 along its longitudinal direction X 61 which, in the example shown, is substantially horizontal and perpendicular to the plane defined by the axes Y 16 and Z 16 .

Le manipulateur 6 transfère chaque pièce 2, une fois marquée, du mandrin amont 12 au mandrin aval 14. Après avoir saisi une pièce 2 marquée sur le mandrin amont 12, puis l'avoir retirée de ce mandrin 12, le manipulateur 6 attend que le mandrin aval 14 ait été placé dans l'axe de cette pièce 2, par translation du support 16 par rapport au bâti 3. Lorsque tel est le cas, le manipulateur 6 déplace cette pièce 2 vers le mandrin aval 14 et la lâche lorsqu'elle est enfilée sur ce mandrin 14. Le manipulateur 6 se place ensuite en position d'attente, à l'écart des trajectoires des mandrins 12 et 14. Lors de son transfert entre les mandrins 12 et 14, chaque pièce 2 est ainsi translatée selon son axe central, dans un sens puis dans le sens opposé.The manipulator 6 transfers each piece 2, once marked, from the upstream mandrel 12 to the downstream mandrel 14. After having grasped a piece 2 marked on the upstream mandrel 12, then removed from this mandrel 12, the manipulator 6 waits for the downstream mandrel 14 to be placed in the axis of this piece 2, by translation of the support 16 relative to 3. When this is the case, the manipulator 6 moves this piece 2 to the downstream mandrel 14 and the loose when it is threaded on the mandrel 14. The manipulator 6 is then placed in the waiting position, at the distance of the trajectories of the mandrels 12 and 14. During its transfer between the mandrels 12 and 14, each part 2 is thus translated along its central axis, in one direction and then in the opposite direction.

Sur les figures 3 à 7, l'axe vertical Z6 représente la position du manipulateur 6.On the Figures 3 to 7 the vertical axis Z 6 represents the position of the manipulator 6.

L'écartement entre le manipulateur amont 4 et le manipulateur de transfert 6, d'une part, et l'écartement entre le manipulateur de transfert 6 et le manipulateur aval 8, d'autre part, sont réglables. En particulier, dans l'exemple représenté, l'écartement entre chaque couple de manipulateurs est choisi égal à l'entraxe e entre les mandrins 12 et 14.The spacing between the upstream manipulator 4 and the transfer manipulator 6, on the one hand, and the spacing between the transfer manipulator 6 and the downstream manipulator 8, on the other hand, are adjustable. In particular, in the example shown, the spacing between each pair of manipulators is chosen equal to the spacing e between the mandrels 12 and 14.

La machine de marquage 1 est également pourvue d'une caméra linéaire 7 destinée à contrôler la qualité du marquage d'une pièce 2 marquée, portée par le mandrin aval 14. La caméra 7 peut être du type commercialisé par la société DALSA sous la référence SPYDER 2 2048 points. Elle peut également être d'un autre type, notamment du type de celle prévue dans FR-A-2 633 062 . Cette caméra 7 est supportée par un chariot 9 monté à coulissement par rapport au bâti 3 selon une direction D9 parallèle à l'axe Y16. Le chariot 9 est prévu pour déplacer la caméra 7 de façon à ce que sa ligne de lecture coïncide en permanence, au cours du contrôle de la qualité du marquage d'une pièce 2 portée par le mandrin aval 14, avec la surface marquée de cette pièce 2.The marking machine 1 is also provided with a linear camera 7 intended to control the quality of marking of a marked part 2 carried by the downstream mandrel 14. The camera 7 may be of the type marketed by the company DALSA under the reference SPYDER 2 2048 points. It may also be of another type, in particular of the type provided for in FR-A-2,633,062 . This camera 7 is supported by a carriage 9 slidably mounted relative to the frame 3 in a direction D 9 parallel to the axis Y 16 . The carriage 9 is provided to move the camera 7 so that its reading line coincides permanently, during the control of the quality of the marking of a part 2 carried by the downstream mandrel 14, with the marked surface of this part 2.

Plus précisément et en référence aux figures 3 à 5, la caméra 7 est disposée à une distance correspondant à sa distance focale f par rapport à la surface externe 21 d'une pièce 2A portée par le mandrin aval 14, la pièce 2A ayant été préalablement marquée sur le mandrin amont 12 par le poinçon 51. Lorsque la pièce 2A est déplacée par le mandrin aval 14 asservi au mandrin amont 12, la caméra 7 est déplacée par le chariot 9 parallèlement à, et de manière synchronisée avec, la ligne L de tangence entre le poinçon 51 et la surface externe 21 d'une pièce 2B en cours de marquage sur le mandrin amont 12. Cette ligne de tangence est perpendiculaire au plan de la figure 4 et représentée sur cette figure par un point correspondant à son intersection avec le plan de cette figure.More precisely and with reference to Figures 3 to 5 , the camera 7 is disposed at a distance corresponding to its focal length f with respect to the outer surface 21 of a part 2A carried by the downstream mandrel 14, the part 2A having been previously marked on the upstream mandrel 12 by the punch 51 When the part 2A is moved by the downstream mandrel 14 slaved to the upstream mandrel 12, the camera 7 is moved by the carriage 9 parallel to and synchronously with the line L of tangency between the punch 51 and the outer surface 21 of a part 2B being marked on the upstream mandrel 12. This line of tangency is perpendicular to the plane of the figure 4 and represented in this figure by a point corresponding to its intersection with the plane of this figure.

Le déplacement de la pièce marquée 2A en rotation autour de l'axe R14 et en translation parallèlement aux axes Y16 et Z16 permet d'obtenir un déplacement de la ligne L uniquement selon la direction de l'axe Y16. Ainsi, la machine de marquage 1 conforme à l'invention permet de contrôler la qualité du marquage des pièces 2 avec un mouvement simple de la caméra 7, ce mouvement étant limité à une translation parallèle à l'axe Y16. Tel est le cas également pour des pièces de forme plus complexe, telles que par exemple des pièces à section transversale polygonale.The displacement of the marked part 2A in rotation about the axis R 14 and in translation parallel to the axes Y 16 and Z 16 makes it possible to obtain a displacement of the line L only in the direction of the axis Y 16 . Thus, the marking machine 1 according to the invention makes it possible to control the marking quality of the pieces 2 with a simple movement of the camera 7, this movement being limited to a translation parallel to the Y axis 16 . This is also the case for parts of more complex shape, such as for example polygonal cross section pieces.

Le mouvement de la caméra 7 et la fréquence des prises de vue sont définis par un codeur, non représenté. La fréquence des prises de vue de la caméra 7 est en permanence adaptée à la vitesse de défilement de la surface marquée 21 de la pièce 2A marquée, cette vitesse étant égale à la vitesse tangentielle par rapport au poinçon 51 de la pièce 2B en cours de marquage sur le mandrin amont 12. En particulier, la fréquence des prises de vue augmente lorsque la vitesse tangentielle de la pièce 2B par rapport au poinçon 51 augmente.The movement of the camera 7 and the frequency of the shots are defined by an encoder, not shown. The recording frequency of the camera 7 is constantly adapted to the running speed of the marked surface 21 of the marked part 2A, this speed being equal to the tangential speed with respect to the punch 51 of the part 2B being marking on the upstream mandrel 12. In particular, the frequency of shooting increases as the tangential speed of the part 2B relative to the punch 51 increases.

En vue de limiter les vibrations relatives du mandrin aval 14 et de la caméra 7 selon des directions parallèles à l'axe R14, le support 16 comporte une équerre de renfort 161 au voisinage du mandrin 14. Les vibrations résiduelles du mandrin 14 au cours de son déplacement sont enregistrées et soustraites des images acquises par la caméra 7, afin d'obtenir des images corrigées. De même, on peut tenir compte des vibrations de la caméra 7 sur son chariot 9.In order to limit the relative vibrations of the downstream mandrel 14 and the camera 7 in directions parallel to the axis R 14 , the support 16 comprises a reinforcing square 161 in the vicinity of the mandrel 14. The residual vibrations of the mandrel 14 during of its displacement are recorded and subtracted from the images acquired by the camera 7, in order to obtain corrected images. Similarly, the vibrations of the camera 7 can be taken into account on its carriage 9.

La machine de marquage 1 comporte une unité électronique de contrôle et de commande, non représentée, qui pilote son fonctionnement. En particulier, cette unité pilote les manipulateurs 4, 6 et 8 et les moyens de manoeuvre du mandrin 12, du support 16 et du chariot 9, à partir d'informations en provenance de capteurs, également non représentés dans un souci de clarté.The marking machine 1 comprises an electronic control and control unit, not shown, which controls its operation. In particular, this unit controls the manipulators 4, 6 and 8 and the operating means of the mandrel 12, the support 16 and the carriage 9, from information from sensors, also not shown for the sake of clarity.

Un procédé de marquage d'une pièce de forme 2B et de contrôle de la qualité de son marquage au moyen de la machine de marquage 1 comprend des étapes telles que décrites ci-après, en référence aux figures 3 à 7 :A method of marking a shaped part 2B and checking the quality of its marking by means of the marking machine 1 comprises steps as described below, with reference to Figures 3 to 7 :

Tout d'abord, le manipulateur amont 4 et le manipulateur de transfert 6 placent respectivement, et de manière sensiblement simultanée, une pièce 2B à marquer sur le mandrin amont 12 et une pièce 2A, préalablement marquée, sur le mandrin aval 14. Le support 16 se trouve alors dans une première position visible à la figure 3, dans laquelle le mandrin amont 12 est positionné en amont et au-dessous du poinçon 51, au voisinage de l'extrémité amont du poinçon 51.First, the upstream manipulator 4 and the transfer manipulator 6 respectively place, and substantially simultaneously, a part 2B to be marked on the upstream mandrel 12 and a previously marked part 2A on the downstream mandrel 14. The support 16 is in a first position visible to the figure 3 , in which the upstream mandrel 12 is positioned upstream and below the punch 51, in the vicinity of the upstream end of the punch 51.

Le mandrin amont 12 est alors entraîné en translation par le support 16 parallèlement aux axes Y16 et Z16 et en rotation autour de l'axe R12, de manière à déplacer la pièce 2B par rapport au poinçon 51 pour son marquage, comme visible à la figure 4. La pièce 2B est marquée par roulage par rapport au poinçon 51, ce qui correspond à un déplacement du support 16 de sa première position, visible à la figure 3, vers une deuxième position, visible à la figure 5. Au cours de ce marquage, le poinçon 51 est en appui sur la surface 21 de la pièce 2B le long de la ligne de tangence L.The upstream mandrel 12 is then driven in translation by the support 16 parallel to the axes Y 16 and Z 16 and in rotation about the axis R 12 , so as to move the workpiece 2B with respect to punch 51 for its marking, as visible in FIG. figure 4 . The part 2B is marked by rolling relative to the punch 51, which corresponds to a displacement of the support 16 from its first position, visible to the figure 3 , to a second position, visible to the figure 5 . During this marking, the punch 51 bears on the surface 21 of the part 2B along the line of tangency L.

Simultanément au marquage de la pièce 2B portée par le mandrin amont 12, la pièce 2A, portée par le mandrin aval 14 et préalablement marquée sur le mandrin amont 12, est déplacée par le mandrin aval 14 par rapport à la caméra 7 pour le contrôle de la qualité de son marquage. Le mouvement du mandrin aval 14 est asservi à celui du mandrin amont 12, en translation grâce au support 16 qui déplace simultanément les deux mandrins dans le plan des axes Y16 et Z16, et en rotation grâce à la courroie 18 qui entraîne le mandrin 14 en rotation autour de l'axe R14 simultanément à la rotation du mandrin 12 autour de l'axe R12. Le contrôle de la qualité du marquage de la pièce 2A a lieu en déplaçant la caméra 7 parallèlement à, et de manière synchronisée avec, la ligne de tangence L, grâce au chariot 9. Les mouvements du support 16 sont représentés par les doubles flèches Fy et Fz à la figure 4, alors que les mouvements correspondants et simultanés du chariot 9 de la caméra 7 sont représentés par la flèche F'y. Ainsi, comme le mouvement du mandrin aval 14 est identique à celui du mandrin amont 12, la caméra 7 est maintenue à distance focale f de la surface marquée de la pièce 2A au cours du contrôle, comme visible à la figure 4. De plus, chaque image acquise par la caméra 7 est corrigée pour tenir compte des éventuelles vibrations relatives du mandrin aval 14 et de la caméra 7, ce qui assure la fiabilité et la précision du contrôle de la qualité du marquage de la pièce 2A portée par le mandrin 14.Simultaneously with the marking of the part 2B carried by the upstream mandrel 12, the part 2A, carried by the downstream mandrel 14 and previously marked on the upstream mandrel 12, is displaced by the downstream mandrel 14 relative to the camera 7 for the control of the quality of its marking. The movement of the downstream mandrel 14 is slaved to that of the upstream mandrel 12, in translation thanks to the support 16 which simultaneously moves the two mandrels in the plane of the axes Y 16 and Z 16 , and in rotation thanks to the belt 18 which drives the mandrel 14 in rotation about the axis R 14 simultaneously with the rotation of the mandrel 12 about the axis R 12 . The control of the quality of the marking of the part 2A takes place by moving the camera 7 parallel to and synchronously with the line of tangency L, thanks to the carriage 9. The movements of the support 16 are represented by the double arrows F y and F z at the figure 4 , while the corresponding and simultaneous movements of the carriage 9 of the camera 7 are represented by the arrow F ' y . Thus, since the movement of the downstream mandrel 14 is identical to that of the upstream mandrel 12, the camera 7 is held at a focal distance f of the marked surface of the part 2A during the inspection, as visible in FIG. figure 4 . In addition, each image acquired by the camera 7 is corrected to take into account any relative vibrations of the downstream mandrel 14 and the camera 7, which ensures reliability and reliability. accuracy of the control of the quality of the marking of the part 2A carried by the mandrel 14.

Lorsque le marquage de la pièce 2B portée par le mandrin amont 12 et le contrôle, en simultané, de la qualité du marquage de la pièce 2A ont eu lieu, le support 16 se trouve dans sa deuxième position, visible à la figure 5. Dans cette position du support 16, les manipulateurs de transfert 6 et aval 8 sont aptes à décharger respectivement, et de manière sensiblement simultanée, les mandrins 12 et 14. Plus précisément, le manipulateur aval 8 transfère la pièce 2A, dont le marquage a été contrôlé comme étant satisfaisant au moyen de la caméra 7, du mandrin aval 14 vers un réceptacle ou un convoyeur d'évacuation des pièces marquées, non représenté sur les figures. Simultanément, le manipulateur de transfert 6 saisit la pièce 2B et la retire du mandrin amont 12.When the marking of the part 2B carried by the upstream mandrel 12 and the simultaneous control of the quality of the marking of the part 2A have taken place, the support 16 is in its second position, visible at the figure 5 . In this position of the support 16, the transfer manipulator 6 and downstream 8 are able to respectively discharge, and substantially simultaneously, the mandrels 12 and 14. More specifically, the downstream manipulator 8 transfers the part 2A, the marking has been controlled to be satisfactory by means of the camera 7, the downstream mandrel 14 to a receptacle or evacuation conveyor marked parts, not shown in the figures. Simultaneously, the transfer manipulator 6 grasps the part 2B and removes it from the upstream mandrel 12.

Le support 16 est alors ramené de sa deuxième position vers sa première position. Dans cette étape, et comme visible à la figure 6, les mandrins 12 et 14 ne portent aucune pièce et la pièce 2B est portée par le manipulateur de transfert 6.The support 16 is then brought back from its second position to its first position. In this step, and as visible at figure 6 the mandrels 12 and 14 carry no parts and the part 2B is carried by the transfer manipulator 6.

Lorsque le support 16 est de retour dans sa première position visible à la figure 7, le manipulateur amont 4 et le manipulateur de transfert 6 placent respectivement, et de manière sensiblement simultanée, une pièce 2C à marquer sur le mandrin amont 12 et la pièce marquée 2B sur le mandrin aval 14. Le contrôle de la qualité du marquage de la pièce 2B a ensuite lieu simultanément au marquage de la pièce 2C, par répétition des étapes des figures 3 à 6, la pièce 2A étant remplacée par la pièce 2B et la pièce 2B par la pièce 2C.When the support 16 is back in its first visible position at the figure 7 , the upstream manipulator 4 and the transfer manipulator 6 respectively place, and substantially simultaneously, a part 2C to be marked on the upstream mandrel 12 and the marked part 2B on the downstream mandrel 14. The quality control of the marking of the part 2B then takes place simultaneously with the marking of the part 2C, by repetition of the steps of the Figures 3 to 6 the piece 2A being replaced by the piece 2B and the piece 2B by the piece 2C.

La machine de marquage 1 conforme à l'invention permet donc à la fois le marquage de pièces de forme 2 et le contrôle de la qualité de leur marquage. Le mouvement relatif de la caméra 7 et de la pièce 2 contrôlée, portée par le mandrin aval 14, permet de maintenir la caméra 7 à distance focale f de la surface marquée de la pièce 2 au cours du contrôle et ainsi d'assurer un contrôle fiable du marquage. La prise en compte des vibrations relatives du mandrin 14 et de la caméra 7 pour corriger les images acquises par la caméra 7 participe à la précision du contrôle qualité. De plus, l'asservissement du mouvement du mandrin aval 14 à celui du mandrin amont 12, au moyen du support 16 et de la courroie 18, permet d'obtenir une machine de marquage et de contrôle de la qualité du marquage compacte, notamment plus compacte et économique que deux machines juxtaposées dont l'une serait dédiée au marquage et l'autre au contrôle de la qualité du marquage. Enfin, le mouvement de la caméra 7 pour le contrôle de la surface marquée des pièces 2 s'effectue selon une seule direction, grâce au déplacement de la pièce 2 marquée par le mandrin 14 à la fois en rotation et en translation selon deux directions.The marking machine 1 according to the invention thus allows both the marking of shaped parts 2 and the quality control of their marking. Movement relative of the camera 7 and the controlled part 2, carried by the downstream mandrel 14, keeps the camera 7 at a focal distance f of the marked surface of the part 2 during the control and thus to ensure a reliable control of the marking. Taking into account the relative vibrations of the mandrel 14 and the camera 7 to correct the images acquired by the camera 7 contributes to the accuracy of the quality control. In addition, the slaving of the movement of the downstream mandrel 14 to that of the upstream mandrel 12, by means of the support 16 and the belt 18, makes it possible to obtain a machine for marking and quality control of the compact marking, in particular more compact and economical than two machines juxtaposed one of which would be dedicated to the marking and the other to control the quality of the marking. Finally, the movement of the camera 7 for the control of the marked surface of the parts 2 is effected in a single direction, thanks to the displacement of the part 2 marked by the mandrel 14 both in rotation and in translation in two directions.

Selon une variante non représentée de l'invention, le poinçon plan 51 peut être remplacé par une racle de sérigraphie associée à un écran de sérigraphie. Dans ce cas, le mandrin amont 12 déplace une pièce de forme 2 à marquer sous l'écran de sérigraphie de manière analogue au cas du poinçon plan, la ligne de tangence entre la racle de sérigraphie et la pièce 2 à marquer correspondant alors à une ligne de la racle de sérigraphie orientée parallèlement à l'axe de rotation R12 de la pièce 2 à marquer. Le contrôle de la qualité du marquage d'une pièce 2 marquée portée par le mandrin aval 14, dont le mouvement est asservi à celui du mandrin amont 12, a lieu, comme dans le cas du poinçon plan, par déplacement de la caméra 7 parallèlement à, et de manière synchronisée avec, la ligne de tangence entre la racle de sérigraphie et la pièce en cours de marquage. Le mouvement de la caméra 7 est donc dans ce cas un mouvement de translation selon un axe parallèle à l'axe Y16 de la figure 1. De manière avantageuse, la racle de sérigraphie et la caméra 7 sont déplacées par un même chariot en translation parallèlement à l'axe Y16.According to a not shown variant of the invention, the planar punch 51 may be replaced by a screen printing squeegee associated with a screen printing screen. In this case, the upstream mandrel 12 moves a piece of shape 2 to be marked under the screen printing screen in a similar manner to the case of the plane punch, the line of tangency between the screen printing doctor and the part 2 to be marked then corresponding to a line of the serigraphy doctor blade oriented parallel to the axis of rotation R 12 of the part 2 to be marked. The control of the marking quality of a marked part 2 carried by the downstream mandrel 14, whose movement is slaved to that of the upstream mandrel 12, takes place, as in the case of the plane punch, by moving the camera 7 in parallel. to, and in a manner synchronized with, the line of tangency between the serigraphy squeegee and the workpiece being marked. The movement of the camera 7 is in this case a translational movement along an axis parallel to the Y axis 16 of the figure 1 . Advantageously, the serigraphy squeegee and the camera 7 are moved by a same carriage in translation parallel to the axis Y 16 .

Claims (10)

  1. Machine (1) for marking hollow parts (2), comprising a marking member (51) designed to be in contact on at least one line of tangency with a hollow part for it to be marked, and first (12) and second (14) mandrels capable of supporting respectively a first part (2B) to be marked and a second part (2A) previously marked on the first mandrel (12) by the marking member, a control camera (7) being placed at a focal length (f) from the marked surface of the second part (2A), characterized in that the first mandrel is capable of moving the first part (2B) relative to the marking member in rotation about an axis (R12) and in translation parallel to two axes (Y16, Z16) perpendicular to one another and to the axis of rotation (R12), the movement of the second mandrel (14) being slaved and identical to that of the first mandrel (12) and the camera (7) being capable of moving (F'y) parallel to, and in synchronism with, the line of tangency (L) between the marking member and the first part (2B).
  2. Marking machine according to Claim 1, characterized in that the tangential speed of the first part (2B) relative to the marking member (51) is substantially constant.
  3. Marking machine according to either one of Claims 1 or 2, characterized in that the frequency of the camera (7) shots depends on the tangential speed of the first part (2B) relative to the marking member (51).
  4. Marking machine according to any one of the preceding claims, characterized in that the first (12) and second (14) mandrels are mounted on one and the same support (16) that moves them parallel to said axes of translation (Y16, Z16).
  5. Marking machine according to any one of the preceding claims, characterized in that it comprises means (18) for rotationally synchronizing the first (12) and second (14) mandrels.
  6. Marking machine according to Claim 4, characterized in that it comprises a manipulator (6) for transferring parts (2) between the first (12) and second (14) mandrels, said support (16) being movable between a second position (figure 5) in which the manipulator is capable of unloading a part (2B) from the first mandrel and a first position (figure 3) in which the manipulator is capable of loading said part (2B) onto the second mandrel.
  7. Marking machine according to any one of the preceding claims, characterized in that the marking member is a flat stamp (51) or a screenprinting doctor blade.
  8. Method for marking a hollow part (2) and for controlling the quality of its marking, which comprises steps in which:
    - a marking member (51) marks the part (2B), the part (2B) being moved relative to the marking member, by a first mandrel (12), in rotation about an axis (R12)
    - a camera (7) controls the quality of the marking of the part (2B) by remaining at a focal length (f) from the marked surface of the part, the part (2B) being moved by a second mandrel (14) whose movement is identical to that of the first mandrel, characterized in that the part is moved relative to the marking member also in translation parallel to two axes (Y16, Z16) perpendicular to one another and to the axis of rotation (R12) and the control camera moves at a focal length from the marked surface of the part.
  9. Method for marking a hollow part (2) and of controlling the quality of its marking according to Claim 8, characterized in that it comprises steps in which:
    - when the part (2B) is marked by the marking member (51), a support (16), to which the first (12) and second (14) mandrels are connected, moves parallel to said axes of translation (Y16, Z16) from a first position (figure 3) to a second position (figure 5);
    - the part (2B) is unloaded from the first mandrel by a manipulator (6) for transferring the part (2B) between the first and second mandrels, this manipulator being capable of unloading the part (2B) from the first mandrel in said second position of the support and of loading the part (2B) onto the second mandrel in said first position of the support;
    - the support moves from said second position to said first position;
    - the manipulator loads the part (2B) onto the second mandrel;
    - the camera (7) controls the quality of marking of the part (2B) supported by the second mandrel (14).
  10. Method for marking a hollow part (2) and of controlling the quality of its marking according to either one of Claims 8 or 9, characterized in that each picture taken by the camera (7) is corrected to take account of relative vibrations of the second mandrel (14) and the camera.
EP07356021.1A 2006-02-21 2007-02-20 Machine and method for marking hollow components Active EP1820647B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07356021T PL1820647T3 (en) 2006-02-21 2007-02-20 Machine and method for marking hollow components

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0601506A FR2897555B1 (en) 2006-02-21 2006-02-21 MACHINE AND METHOD FOR MARKING SHAPE PIECES

Publications (3)

Publication Number Publication Date
EP1820647A2 EP1820647A2 (en) 2007-08-22
EP1820647A3 EP1820647A3 (en) 2011-03-09
EP1820647B1 true EP1820647B1 (en) 2014-01-15

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Application Number Title Priority Date Filing Date
EP07356021.1A Active EP1820647B1 (en) 2006-02-21 2007-02-20 Machine and method for marking hollow components

Country Status (5)

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US (1) US7823505B2 (en)
EP (1) EP1820647B1 (en)
ES (1) ES2457844T3 (en)
FR (1) FR2897555B1 (en)
PL (1) PL1820647T3 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2943634B1 (en) 2009-03-24 2011-04-22 Cer MACHINE AND METHOD FOR MARKING OR LABELING
JP5669535B2 (en) * 2010-11-29 2015-02-12 ローランドディー．ジー．株式会社 Cutting device
US9321256B2 (en) * 2012-08-14 2016-04-26 Illinois Tool Works Inc. System for applying images to planar surfaces of a target object
FR3001649B1 (en) * 2013-02-04 2015-08-07 Illinois Tool Works MACHINE AND METHOD FOR MARKING ARTICLES
FR3001648B1 (en) * 2013-02-04 2015-07-17 Illinois Tool Works MACHINE AND METHOD FOR MARKING ARTICLES
JP6486677B2 (en) * 2014-12-24 2019-03-20 株式会社小森コーポレーション Electronic circuit printing method and apparatus
JP6486676B2 (en) * 2014-12-24 2019-03-20 株式会社小森コーポレーション Electronic circuit printing method and apparatus

Family Cites Families (8)

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Publication number Priority date Publication date Assignee Title
DE1247904B (en) * 1961-09-13 1967-08-17 Kurt G Hinterkopf Automatic treatment system for hollow bodies, such as tubes or the like.
FR2633062B1 (en) * 1988-06-21 1992-11-27 Dubuit Mach METHOD FOR CONTROLLING THE QUALITY OF A PRINTING, AND PRINTING MACHINE IMPLEMENTING SUCH A METHOD
US6283022B1 (en) * 1997-10-17 2001-09-04 Deco Patents, Inc. Apparatus and method for direct rotary screen printing radiation curable compositions onto cylindrical articles
IT1305329B1 (en) * 1998-10-22 2001-05-04 Omso Spa AUTOMATIC QUALITY DETECTION DEVICE FOR PRINTING SUFLACONS OR BOTTLES OF ANY SHAPE
US6684770B2 (en) * 2001-06-29 2004-02-03 Deco Patents, Inc. Apparatus and method for direct rotary printing compositions onto cylindrical articles
US6840166B2 (en) * 2002-06-12 2005-01-11 Machine Engineering, Inc. Mandrel trip apparatus
FR2860180B1 (en) * 2003-09-26 2005-12-23 Dubuit Mach PRINTING MACHINE
FR2881976B1 (en) * 2005-02-15 2008-10-03 Cer Soc Par Actions Simplifiee MACHINE AND METHOD FOR MARKING AN OBJECT

Also Published As

Publication number Publication date
EP1820647A2 (en) 2007-08-22
FR2897555A1 (en) 2007-08-24
EP1820647A3 (en) 2011-03-09
ES2457844T3 (en) 2014-04-29
US7823505B2 (en) 2010-11-02
US20070199455A1 (en) 2007-08-30
FR2897555B1 (en) 2008-04-18
PL1820647T3 (en) 2014-07-31

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