WO1996012395A1 - Reproduction compacte de composants - Google Patents

Reproduction compacte de composants Download PDF

Info

Publication number
WO1996012395A1
WO1996012395A1 PCT/SE1995/001176 SE9501176W WO9612395A1 WO 1996012395 A1 WO1996012395 A1 WO 1996012395A1 SE 9501176 W SE9501176 W SE 9501176W WO 9612395 A1 WO9612395 A1 WO 9612395A1
Authority
WO
WIPO (PCT)
Prior art keywords
components
image
captured
image capturing
images
Prior art date
Application number
PCT/SE1995/001176
Other languages
English (en)
Inventor
Nils Jacobsson
Original Assignee
Mydata Automation Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mydata Automation Ab filed Critical Mydata Automation Ab
Priority to EP95934941A priority Critical patent/EP0786198A1/fr
Priority to JP8513152A priority patent/JPH10507584A/ja
Publication of WO1996012395A1 publication Critical patent/WO1996012395A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K13/00—Apparatus or processes specially adapted for manufacturing or adjusting assemblages of electric components
    • H05K13/08—Monitoring manufacture of assemblages
    • H05K13/081—Integration of optical monitoring devices in assembly lines; Processes using optical monitoring devices specially adapted for controlling devices or machines in assembly lines
    • H05K13/0813—Controlling of single components prior to mounting, e.g. orientation, component geometry
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K13/00—Apparatus or processes specially adapted for manufacturing or adjusting assemblages of electric components
    • H05K13/04—Mounting of components, e.g. of leadless components
    • H05K13/0404—Pick-and-place heads or apparatus, e.g. with jaws
    • H05K13/0408—Incorporating a pick-up tool
    • H05K13/041—Incorporating a pick-up tool having multiple pick-up tools

Definitions

  • the present invention relates to reproduction of several components, in particular components retained by a row of pickup devices in a component assembly machine, such as an assembly machine for the automatic mounting of electronic and similar components.
  • Automatic assembly machines for electronic components conventionally have a pickup head, which picks electronic components from different magazines and places them on accurately determined locations on a circuit board.
  • the pickup head can have a number of individual pickup devices or sucking pipettes whereby in a pickup movement of the pickup head several components are picked at the same time, so that after the pickup operation the pickup head carries several components.
  • automatic image processing can be used and then an image of all the simultaneously retained components is captured, when the pickup head and all its separate pickup devices, by which the components are retained, adopt accurately predetermined reference positions.
  • the sucking nozzles of the pickup devices are then placed in a row and thus the components are also generally retained in positions along a line.
  • image fields or fields of view are used, which are generally rectangular and have dimensions, which do not differ too much from a quadratic shape, for instance having a ratio of normally 4:3 of the long and short sides of the image field at most.
  • image fields or fields of view are generally rectangular and have dimensions, which do not differ too much from a quadratic shape, for instance having a ratio of normally 4:3 of the long and short sides of the image field at most.
  • Conventional methods for capturing an image of electronic components before automatic or electronic image processing can comprise one of :
  • a composite image is produced through a successive exposure of the components, whereby the reproductions of the individual components can be closely or densely packed in the final image.
  • a pickup head for an automatic component assembly machine comprises several pickup devices or tools such as pipettes placed next to each other for retaining components at their bottom surfaces.
  • An image of the components is captured by means of a reproduction system, such as a video camera and a lens arrangement, in order to be used in an automatic evaluation of the position of the components at the tools.
  • This image is composed by superposing successive images, which are captured of only one component at each time.
  • the lens arrangement can be set for a greater magnification than if only one image simultaneously had been captured of all the components. Thereby a more accurate determination of the positions of the components can be obtained in the evaluation.
  • Fig. 1 is a schematic perspective view of parts of a pickup head for an automatic component assembly machine having schematically shown illumination means and optical means for capturing an image of retained components,
  • - Fig. 2 is an image of retained components captured by means of conventional optical devices
  • - Fig. 3 is an image of retained components captured so that the individual pictures of the components are packed
  • - Fig. 4 is an image captured as in Fig. 3 but having an increased magnification
  • Fig. 5 is a perspective view of a component assembly device.
  • a pickup tool and pipettes 1 are shown belonging to a pickup and placement head or a component fetching head, indicated at 2, of an automatic assembly machine for electronic components.
  • the pickup head 2 is placed on an x- head, which is movable in a horizontal direction, the x-direction.
  • the pipettes 1 are arranged in a row, i.e. parallel to each other in the same vertical plane, which is advantageously parallel to the x-direction, and they are placed at equally spaced distances from each other and retain components 3 at their lower ends, which are equipped with sucking nozzles.
  • the components 3 are picked up through amongst others a movement of the pickup head 2 in the x-direction and then, when the head 2 having the pipettes 1 is moved to a location, where the components are to be placed, it passes over a location, where an image can be captured of the components 3 from underneath by means of a fixedly mounted image capturing system. It comprises a lens arrangement 5 and a video camera 7 having a light sensitive surface 9 and is placed on a suitable location under the path of movement of the components 3 in order to capture an image thereof.
  • the image captured by the video camera 7 is communicated to an image evaluation device 7', where a determination of the positions of the components is made, the result of the determination being then transferred to a control unit 7" arranged to control the movement of the x-wagon, the pickup head 2 and the movement of the individual pipettes 3 in relation thereto.
  • Fig. 2 The image of all the components obtained hereby is schematically shown in Fig. 2 comprising a rectangular image field 11 and individual pictures 13 of the components 3 thereon.
  • the individual pictures 13 have then basically the same outer shape or profile as the components, typically a rectangular shape, and are placed in a row along an approximately straight line, normally in the centre of the image field 11 in parallel to its one of its sides, typically the long side. Due to the row-wise arrangement of the components 3 and hereby of their reproductions 13, normally only the central part of the image field 11 is used for the reproduction, at least if the components 3 are not too elongated, and thereby information only needs to be collected from this area during an automatic image processing of the signals from the light sensitive elements on the surface 9. The information from other parts of the image field 11 cannot be used.
  • pictures can instead be successively captured of each individual component retained by a pickup tool 1 , and the whole head 2 can be moved between each capturing of an image, so that a component, for which an image is directly captured after an image is captured for another component, is placed in the camera field closer to the position of the previous component.
  • the latter of these images is superposed on previously captured images, whereby a resulting image according to Fig. 3 can be obtained, where the pictures 13' of the individual components are placed more densely packed than in the image according to Fig. 2, if the same optical magnification is used.
  • the region which is reproduced on the light sensitive surface 9 of the camera 7 is divided into sector shaped sub-regions by means of thin plates or lamellae 15, the surfaces of which are treated in order not to reflect light, for instance blackened and dulled.
  • the sub-regions are placed next to each other, are open in a direction towards the video camera 7 and also to the opposite direction in order to let light through from a component 3 retained by a tool 1.
  • the openings are oblong in a transverse direction in relation to the row of the components 3 and only so wide, that the component 3 can well be placed therein in order to be reproduced on the light sensitive surface 9.
  • illumination devices for each sector shaped sub-region, which can be selectively activated to emit short light flashes, when a component 3 is located in front of or in its opening.
  • the illumination devices can comprise either fixedly mounted lamps 17, which are placed above or behind the components, or fixedly mounted lamps 19, which are placed underneath the components 3, approximately in the openings of the sub-sectors. In any case the light emitted from the lamps must be shielded in a lateral direction, so that it does not reach more than one component, which is located in the sector shaped area associated with the lamps and shielded by the lamellae 15.
  • the lens system 5 and the camera 7 are assumed to be fixedly adjusted for a suitably selected, large magnification.
  • the pickup head 2 is assumed to be equipped with eight pickup tools 1 , which are numbered 1 , 2, ... , 8 counted from the left as seen in Fig. 1.
  • the sub- sectors formed by the partitioning lamellae 15 are numbered in the same manner from 1 to 8 as counted from the left.
  • the pickup head 2 fetches during a movement to the right in the lateral direction, the x-direction, components 3, which are sucked to and are retained at the bottom surface of the pickup tool 1, and then moves to the left, as seen in Fig. 1.
  • the light sensitive surface 9 of the video camera 7 is activated in order to receive an image, which is equivalent to opening the shutter in a conventional camera.
  • the lamps 17 or 19 are activated during a very short time for sector No. 1 in order to emit a light flash, when the pickup tool No. 1 passes or is located in front of the opening to this sector with the retained component 3 in this opening, then the lamps for sector No. 2 are activated, when the pickup tool No. 2 passes or is located centrally in front of the opening of this sector, etc.
  • the lights 17 or 19 are activated during a very short time for sector No. 8 in order to emit a light flash when the pickup tool No.
  • the lights for sector No. 7 are then activated, when the pickup tool No. 2 passes or is placed centrally in front of the opening of this sector, etc.
  • the achieved image from the light sensitive surface 9 is read, which is equivalent to the closure of the shutter in a conventional camera.
  • the shortest possible exposure time and the lowest risk for that scattered light shall reach the light sensitive surface 9 is obtained.
  • the second method longer times elapse between the captures of the overlapping images, which can be required for recharging a common electric circuit for driving the lamps 17 and 19 respectively for providing the strong light flashes.
  • the sensitivity of the light sensitive surface 9 of the video camera 7 should also be adjusted to a rather low value and the individual light flashes from the lamps 17 and 19 respectively be made very light intensive.
  • a reference In an evaluation of the superposed image, a reference must in some manner be used in order to determine the positions of the components 3 in relation to the pickup devices 1 or the pickup head 2.
  • the successive images can be captured, when the pickup head and its parts continuously pass over the reproduction system.
  • the elements in the light sensitive surface 9 of the camera 7 are then activated for very short time periods in order to capture images of the components 3, which is equivalent to opening the shutter of a conventional camera for a very short time, when a component 3 is present above an intended section.
  • a reference can be arranged in the captured image itself by attaching stiffly to the pickup head 2 reference projections 21 , which extend in parallel to the longitudinal direction of the pickup tools 3 and which have a bottom surface, which is located approximately in the same plane as the bottom side of the components 3 or even can be allowed to be located at a distance behind this plane, as seen from the video camera 7.
  • reference projections 21 which extend in parallel to the longitudinal direction of the pickup tools 3 and which have a bottom surface, which is located approximately in the same plane as the bottom side of the components 3 or even can be allowed to be located at a distance behind this plane, as seen from the video camera 7.
  • this is reproduced on the image captured for each component, as is shown at 23' in Fig. 3 and at 23" in Fig. 4. If the pickup tools 1 with their bottom surfaces only project a small distance from the bottom surface of the pickup head 2, reference marks attached to this under surface of the very pickup head can be used instead of reference projections.
  • each individual pickup tool 1 can be placed in a reference position suitably chosen for this pickup tool, during the capture of an image of the component 3 retained by the tool, and remain in this position, when the image of the component is captured.
  • the reference positions are then different for the different pickup tools and the pickup head 2 must be moved to different reference positions for each pickup tool 1. This can be a rather time consuming process if a large number of pickup tools 1 are arranged.
  • FIG. 5 a component assembly or pick-and-place machine is illustrated in a perspective view showing the general configuration of such a machine.
  • a wagon 501 is movable along a horizontal bar 503, in the x-direction, to different locations, such as above magazine sites 505 intended to hold component feeders, which are movable in a horizontal direction, the y-direction, perpendicular to the guide bar 503 and above a circuit board 507 retained on a slide, also movable in the same direction as the magazine sites 505.
  • the wagon 501 carries a pickup unit or head 2, from the lower side of which the vacuum pipettes 1 protrude downwards.
  • the optical reproduction system including the video camera 7 can be located on one of the magazine sites 505.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Operations Research (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Image Input (AREA)
  • Supply And Installment Of Electrical Components (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

Tête (2) de prélèvement pour une machine automatique d'assemblage de composants qui comprend plusieurs pipettes (1) placées les unes à côté des autres pour retenir des composants (3) au niveau de la buse d'aspiration des pipettes. Une image du composant est prise à l'aide d'une caméra vidéo (7) et d'un système de lentille (5) destiné à être utilisé dans une évaluation automatique (7') des positions des composants situés sur les pipettes. Cette image est composée par superposition d'images successives d'un seul composant (3) à la fois. Grâce à un mouvement approprié de la tête de prélèvement (2) entre la prise des images successives, les reproductions des composants individuels peuvent être placées de manière serrée sur l'image composée. Il en résulte que le système de lentille (5) peut être réglé en vue d'un agrandissement plus important que si une seule image de tous les composants (3) en même temps avait été prise. Il est donc possible de déterminer avec plus de précision les positions des composants lors de l'évaluation.
PCT/SE1995/001176 1994-10-12 1995-10-12 Reproduction compacte de composants WO1996012395A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP95934941A EP0786198A1 (fr) 1994-10-12 1995-10-12 Reproduction compacte de composants
JP8513152A JPH10507584A (ja) 1994-10-12 1995-10-12 部品のコンパクト複写

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9403479A SE515418C2 (sv) 1994-10-12 1994-10-12 Metod och anordning att avbilda i en rad fasthållna komponenter för automatisk utvärdering av komponenternas lägen samt användning av en sådan anordning
SE9403479-0 1994-10-12

Publications (1)

Publication Number Publication Date
WO1996012395A1 true WO1996012395A1 (fr) 1996-04-25

Family

ID=20395589

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1995/001176 WO1996012395A1 (fr) 1994-10-12 1995-10-12 Reproduction compacte de composants

Country Status (4)

Country Link
EP (1) EP0786198A1 (fr)
JP (1) JPH10507584A (fr)
SE (1) SE515418C2 (fr)
WO (1) WO1996012395A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001008461A1 (fr) * 1999-07-23 2001-02-01 Pulsotronic Merten Gmbh & Co. Kg Dispositif d'inspection pour composants
US6954681B2 (en) 2000-12-15 2005-10-11 Cyberoptics Corporation Board align image acquisition device with improved interface
US7190393B2 (en) 2000-12-15 2007-03-13 Cyberoptics Corporation Camera with improved illuminator

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0330294A2 (fr) * 1988-02-23 1989-08-30 Molex Incorporated Appareil pour l'alimentation de composants et méthode pour les placer automatiquement et visuellement contrôlés
EP0374848A2 (fr) * 1988-12-20 1990-06-27 Matsushita Electric Industrial Co., Ltd. Dispositif de montage de circuits intégrés du type boîtier plat
EP0471272A1 (fr) * 1990-08-11 1992-02-19 TDK Corporation Méthode pour monter un élément électronique et dispositif
EP0577080A1 (fr) * 1992-06-29 1994-01-05 Yozan Inc. Méthode d'inspection de l'inclinaison d'un boîtier de circuit intégré
EP0596533A1 (fr) * 1992-11-05 1994-05-11 Yamaha Hatsudoki Kabushiki Kaisha Procédé pour fixer des composants sur un substrat et machine de montage de composants pour ce faire

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0330294A2 (fr) * 1988-02-23 1989-08-30 Molex Incorporated Appareil pour l'alimentation de composants et méthode pour les placer automatiquement et visuellement contrôlés
EP0374848A2 (fr) * 1988-12-20 1990-06-27 Matsushita Electric Industrial Co., Ltd. Dispositif de montage de circuits intégrés du type boîtier plat
EP0471272A1 (fr) * 1990-08-11 1992-02-19 TDK Corporation Méthode pour monter un élément électronique et dispositif
EP0577080A1 (fr) * 1992-06-29 1994-01-05 Yozan Inc. Méthode d'inspection de l'inclinaison d'un boîtier de circuit intégré
EP0596533A1 (fr) * 1992-11-05 1994-05-11 Yamaha Hatsudoki Kabushiki Kaisha Procédé pour fixer des composants sur un substrat et machine de montage de composants pour ce faire

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
FOCUS UPPSLAGSBOK, "Del 10 Tekniken", 1983, Esselte Focus Uppslagsboecker AB, (Stockholm), pages 239, 282. *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001008461A1 (fr) * 1999-07-23 2001-02-01 Pulsotronic Merten Gmbh & Co. Kg Dispositif d'inspection pour composants
US7019771B1 (en) * 1999-07-23 2006-03-28 Pulsotronic Merten Gmbh & Co. Kg Inspection device for components
US6954681B2 (en) 2000-12-15 2005-10-11 Cyberoptics Corporation Board align image acquisition device with improved interface
US7190393B2 (en) 2000-12-15 2007-03-13 Cyberoptics Corporation Camera with improved illuminator

Also Published As

Publication number Publication date
SE9403479L (sv) 1996-04-13
EP0786198A1 (fr) 1997-07-30
JPH10507584A (ja) 1998-07-21
SE515418C2 (sv) 2001-07-30
SE9403479D0 (sv) 1994-10-12

Similar Documents

Publication Publication Date Title
CN109991166B (zh) 用于产品外观缺陷检测的设备及其组合光源装置、方法
KR100927429B1 (ko) 소자 배치를 검사하는 픽 앤드 플레이스 머신
US4783826A (en) Pattern inspection system
US7089656B2 (en) Electric parts mounting apparatus
EP2908614B9 (fr) Mesure optique d'un composant présentant des caractéristiques structurales sur des côtés opposés
DE60303686T2 (de) Bauelementeplazierungskopf und bauelementeplazierungsverfahren
US20090133249A1 (en) Method and apparatus for evaluating a component pick action in an electronics assembly machine
DE112004002120T5 (de) Bestückungsmaschine mit verbesserter Bauteilplatzierungsprüfung
DE60100823T2 (de) Verfahren und Vorrichtung zur Kantendetektion
US5502890A (en) Process for determining the position and coplanarity of the leads of components
JPH05198994A (ja) 部品装着方法及び装置
US5330309A (en) Reader having cassette locating and unlatching mechanism
WO1996012395A1 (fr) Reproduction compacte de composants
JP2000124683A (ja) 電子部品撮像方法および電子部品装着装置
EP0786199B1 (fr) Reproduction d'images de composants
DE10163270A1 (de) Bildaufnahmevorrichtung und zugehöriges Verfahren
US6480223B1 (en) Method and device for detecting the position of terminals and/or edge of components
KR100361219B1 (ko) 부품의 연결부 또는 에지부의 위치를 식별하는 방법 및 장치
WO2006125102A1 (fr) Procede et appareil pour l'evaluation d'une action de prise de composant dans une machine d'assemblage de composants electroniques
JPH0591248A (ja) イメージセンサ
CN114158249B (zh) 自动插件设备
DE112020007760T5 (de) Bauelementmontagevorrichtung und Bauelementmontageverfahren
EP0784915B1 (fr) Reproduction precise de composants grands et petits
CN115567779A (zh) 摄像组件和电子设备
JPH066379B2 (ja) 微少穴挿入用位置決め装置

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): CN JP KR SG US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 1995934941

Country of ref document: EP

ENP Entry into the national phase

Ref country code: US

Ref document number: 1997 817238

Date of ref document: 19970410

Kind code of ref document: A

Format of ref document f/p: F

WWP Wipo information: published in national office

Ref document number: 1995934941

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 1995934941

Country of ref document: EP