JP2012104728A - Apparatus for applying viscous liquid material - Google Patents

Abstract

An object of the present invention is to make it possible to accurately recognize an image of a coating portion when the coating liquid is trial-coated on a trial coating member before the coating operation is started and the coating portion is imaged and inspected by a camera.
An application state inspection unit is set in a part of a plurality of mounting machine modules, and a viscous liquid material is applied to a roll paper on a guide plate by a coating head before starting a coating operation. The applied portion is imaged with the camera of the mounting module, and the applied portion is recognized and inspected by image processing. Before this inspection, select the roll paper that can easily recognize the application part of the viscous liquid material by image processing from multiple types of roll paper according to the type of the viscous liquid material to be applied, and display it on the display device of the mounting machine module To do. If the type of the roll paper displayed on the display device before the inspection is different from the roll paper 40 set in the application state inspection unit 32, the operator can change the roll paper 40 to the type of roll paper displayed on the display device 19. replace.
[Selection] Figure 4

Description

  The present invention relates to a viscous liquid material coating apparatus for applying various viscous liquid materials (for example, mounting adhesives, solder pastes, conductor pastes, resistor pastes, fluxes, mounting underfill agents, etc.).

  In the process of mounting components on the circuit board, various viscous liquid materials (for example, mounting adhesive, solder paste, conductor paste, resistor paste, flux, mounting underfill agent, etc.) are applied to the circuit board. As a coating apparatus for coating these viscous liquid substances on a circuit board, a dedicated coating apparatus is used, or as shown in Patent Document 1 (Japanese Patent Laid-Open No. 2009-81456), a plurality of component mounting machines are used. In some component mounting systems in the component mounting system, the head for applying the viscous liquid material is attached to be replaceable with the mounting head, and the viscous liquid material is applied to the circuit board with the component mounting machine. There is something.

  Patent Document 2 (Japanese Patent Laid-Open No. 6-243235) discloses an inspection apparatus that images and inspects a printed state of cream solder printed on a circuit board with a camera. The lens aperture value) is switched.

JP 2009-81456 A JP-A-6-243235

  By the way, since the application state of the viscous liquid material varies depending on the type (viscosity) of the viscous liquid material and the discharge pressure / discharge time of the application head, the discharge of the application head depends on the type of the viscous liquid material before the start of the coating operation. It is desirable to adjust the pressure and discharge time. Therefore, in order to inspect the application state of the viscous liquid material before the start of the coating operation, the viscous liquid material is trial-coated on a test coating member (for example, a test coating paper or one corner of a circuit board) with a coating head, and the coating portion is camera-mounted. It is necessary to inspect and inspect the coated portion by image processing.

  However, depending on the type of viscous liquid, the color, light reflectance, transparency, etc. of the viscous liquid vary, so depending on the type of viscous liquid, the brightness of the application part of the viscous liquid and the background of the test coating member The difference (brightness difference) may become small and the image recognition accuracy of the application portion of the viscous liquid material may deteriorate, and as a result, the discharge pressure and discharge time of the application head depending on the type of the viscous liquid material before starting the application operation It may be difficult to adjust the value appropriately.

  The inspection technique disclosed in Patent Document 2 is to inspect the printed state of the cream solder with a camera after printing the cream solder on the circuit board. However, if the inspection technique of Patent Document 2 is applied to the inspection before the start of the coating operation, the incident light quantity of the camera (the aperture value of the camera lens) depends on the inspection object even in the inspection before the start of the coating operation. ) Can be considered.

  However, when the luminance difference (brightness difference) between the application portion of the viscous liquid material and the test application member as the background is small, the image recognition accuracy of the application portion of the viscous liquid material is increased only by switching the amount of incident light of the camera. The effect is small, sufficient image recognition accuracy cannot be obtained, and the coated portion of the viscous liquid material cannot be inspected with high accuracy.

  Accordingly, the problem to be solved by the present invention is that when the liquid coating is trial-coated on the test coating member before the start of the coating operation and the coating portion is imaged and inspected with a camera, the viscous liquid on the test coating member is detected. An object of the present invention is to provide a viscous liquid material applicator capable of increasing the image recognition accuracy of an application part of an object and inspecting the application part with high accuracy.

  In order to solve the above-mentioned problems, the invention according to claim 1 is provided with a coating head for applying a viscous liquid material to a circuit board. In a viscous liquid material coating apparatus that images a coating portion with a camera and recognizes and inspects the coating portion by image processing, image processing can be performed from a plurality of types of test coating members according to the type of viscous liquid material to be coated. It is configured to include a production management means for selecting and notifying a trial coating member that can easily recognize the application portion of the viscous liquid material.

  In this configuration, according to the type of the viscous liquid material to be applied, the trial coating member that can easily recognize the application portion of the viscous liquid material is selected from a plurality of types of trial coating members and notified. The operator may test the viscous liquid material by using the test coating member announced before the start of the coating operation, and inspect the application portion by imaging with a camera. It is possible to process images by increasing the luminance difference (brightness difference) between the coated portion and the background of the trial coating member, and increase the image recognition accuracy of the coated portion of the viscous liquid material on the trial coating member. The part can be inspected with high accuracy.

  In this case, the work of replacing the trial coating member according to the notice of the production management means may be performed manually by the operator, or the automatic replacement mechanism for automatically replacing the trial coating member is provided. Also good.

  According to another aspect of the present invention, means for setting the camera shutter speed and / or illumination condition to a condition that can be easily recognized by the image processing may be added according to the type of the viscous liquid material applied by the application head. . In this way, it is possible to further improve the image recognition accuracy of the application portion of the viscous liquid material on the test coating member.

  The present invention may be applied to an apparatus dedicated to the application of a viscous liquid material, or, as in claim 3, an application state inspection unit equipped with a test application member is provided on a feeder set base of a component mounting machine. It is also possible to adopt a configuration in which the coating head is attached to the component mounter so as to be replaceable with the mounting head. In this way, the present invention can be applied even when the coating head is attached to a part of the component mounting machines of the plurality of component mounting machines constituting the component mounting system in place of the mounting head.

  In this case, as in claim 4, roll paper is used as the test coating member, and the roll paper is set to be detachable from the application state inspection unit. The application state inspection unit includes a viscous liquid material in the roll paper. It is preferable to provide a take-up reel that winds up the portion to which the coating is applied and a motor that rotationally drives the take-up reel. In this way, the roll paper is wound around the take-up reel during the period from the end of the inspection after the viscous liquid material is applied on the roll paper to the start of the next trial application. Thus, the work of preparing for the next trial coating can be automatically performed, and the workability can be improved.

FIG. 1 is an external perspective view of an entire module type component mounting system according to an embodiment of the present invention. FIG. 2 is an external perspective view showing a state where the application state inspection unit is attached to the feeder set base of the mounting machine module. FIG. 3 is an external perspective view of the application state inspection unit. FIG. 4 is a side view of the application state inspection unit.

Hereinafter, an embodiment in which a mode for carrying out the present invention is applied to a module type component mounting system will be described.
First, the configuration of the modular component mounting system will be described with reference to FIG.
A plurality of mounter modules 12 (component mounters) are arranged on the base table 11 of the modular component mounting system so as to be replaceable and adjacent to each other in the circuit board transport direction (X direction). Each mounter module 12 includes a feeder 14 such as a tape feeder, a circuit board transport device 15, a camera 16 for parts imaging (parts camera), a mounting head 17, and a camera for board mark imaging (mark camera) on a main body bed 13. ) And the like, and a display device 19 such as a liquid crystal display or a CRT and an operation unit 20 such as operation keys are provided on the front surface of the upper frame 18.

  The circuit boards are sequentially conveyed by the circuit board conveying device 15 of each mounting machine module 12 and components are mounted on the circuit board by the mounting head 17 of each mounting machine module 12. Each mounting machine module 12 is provided with a feeder set base 31 (see FIG. 2) to which the feeder 14 is detachably attached, and a moving mechanism (not shown) that moves in the XYZ directions. A head 17 is detachably attached.

  A mounting head (not shown) for applying the viscous liquid material to the circuit board can be attached to the moving mechanism of any of the mounting machine modules 12 so as to be replaceable with the mounting head 17. The application state inspection unit 32 (see FIG. 2) can be attached to the feeder set base 31 of the mounting machine module 12 in a replaceable manner. Here, examples of the viscous liquid material include a mounting adhesive, a solder paste, a conductor paste, a resistor paste, a flux, and a mounting underfill agent.

  In this embodiment, some (one or several) mounting machine modules 12 of a plurality of mounting machine modules 12 constituting the modular component mounting system are used as a viscous liquid material applicator, and the mounting machine is used. A coating head is attached to the moving mechanism of the module 12 instead of the mounting head 17, and a coating state inspection unit 32 is attached to the feeder set base 31 of the mounting machine module 12 instead of the feeder 14.

Hereinafter, the configuration of the application state inspection unit 32 will be described with reference to FIGS.
As shown in FIGS. 2 and 3, there are a nozzle cleaning device 33 for cleaning the tip of the discharge nozzle of the coating head of the mounting machine module 12 and a coating head for bleeding the coating head around the coating state inspection unit 32. An air vent tray 34 for collecting the viscous liquid material discharged from the discharge nozzles, and a nozzle height measuring sensor 35 such as a touch sensor for measuring the height of the discharge nozzle tip of the coating head are provided. The application state inspection unit 32 is provided with an air hose 36 for supplying cleaning air to the nozzle cleaning device 33, and this air hose 36 is connected to an air supply coupler 37 provided on the mounting machine module 12 side. .

  As shown in FIG. 4, the application state inspection unit 32 includes a roll paper 40 that is a trial application member, a take-up reel 41 that takes up the application paper drawn from the roll paper 40, and the take-up reel 41 that rotates. A motor 42 for driving is provided. A plurality of types of roll papers having different colors and materials are prepared so that the roll paper 40 can easily select a roll paper that recognizes the application portion of the viscous liquid material by image processing according to the type of the viscous liquid material to be applied. A roll paper 40 selected from a plurality of types of roll paper is set in a predetermined position of the application state inspection unit 32 so as to be replaceable. The coated paper drawn from the roll paper 40 is stretched over rollers 43a, 43b, and 43c, drawn onto the guide plate 45 (trial coating position) on the top surface of the coated state inspection unit 32, and wound around the take-up reel 41 through the roller 43d. Taken. As with the roll paper 40, the take-up reel 41 is also detachably set at a predetermined position of the application state inspection unit 32.

  Inside the coating state inspection unit 32, a roll paper presence / absence confirmation sensor 47 such as an optical sensor for confirming the presence / absence of the roll paper 40, a winding confirmation sensor 48 for confirming winding of the roll paper 40, and a take-up reel 41. And a winding full sensor 49 for detecting that the paper winding amount of the paper is full.

  On the lower surface of the application state inspection unit 32, a mounting guide 51 extending in the attaching / detaching direction of the application state inspection unit 32 is provided, and the mounting guide 51 is fitted into the guide groove 38 (see FIG. 2) of the feeder set base 31. It is like that. A lock member 52 urged downward by a spring or the like is provided below the application state inspection unit 32 so as to be movable up and down. The lock member 52 is fitted in the lock groove 39 (see FIG. 2) of the feeder set base 31. By being stuck, the application state inspection unit 32 is locked in a state where it is attached to the feeder set base 31.

  When removing the application state inspection unit 32 from the feeder set base 31, an operator operates a lock release operation mechanism (not shown) to extract the lock member 52 from the lock groove 39 of the feeder set base 31 and release the lock. . In the vicinity of the lock member 52, a lock confirmation sensor 53 for detecting that the lock member 52 is in a locked state in which the lock member 52 is fitted in the lock groove 39 is provided.

  A connector 55 for connecting a signal line / power line of the application state inspection unit 32 to a connector 57 (see FIG. 2) on the mounting machine module 12 side is provided on the rear end surface of the application state inspection unit 32, and the application state inspection. An engagement pin 56 for engaging and fixing the unit 32 is provided, and the engagement pin 56 is inserted into an engagement hole 58 (see FIG. 2) on the mounting machine module 12 side, thereby the application state inspection unit. 32 is positioned and fixed on the feeder set base 31.

  The application state inspection unit 32 is provided with a control device 58 for controlling the motor 42, and the control device 58 of the application state inspection unit 32 and a control device (not shown) of the mounting machine module 12 are connected by a connector 55. ing. The control device of the mounting machine module 12 (or a management computer for managing the entire module type component mounting system) functions as production management means in the scope of claims, and the type of viscous liquid material to be applied and the viscous liquid material by image processing. The data is stored in a storage device (not shown) and stored in the storage device according to the type of the viscous liquid specified in the production job. From among the plurality of types of roll papers, a roll paper that easily recognizes the application portion of the viscous liquid material by image processing is selected and displayed on the display device 19 of the mounter module 12 to notify the operator. For example, when a transparent viscous liquid material is used, the transparent viscous liquid material has a high light reflectance, and therefore, by using roll paper having a low light reflectance, the application shape of the transparent viscous liquid material can be imaged with sufficient accuracy. Can be recognized.

  If the type of roll paper displayed on the display device 19 before the start of the coating operation is different from the roll paper 40 set in the application state inspection unit 32, the operator can use the type of roll paper 40 displayed on the display device 19. Replace with roll paper.

  The control device (or management computer) of the mounter module 12 applies a viscous liquid material to the roll paper on the guide plate 45 with an application head before the start of the application operation, and the application portion is used for imaging the substrate mark of the mounter module 12. The shape and diameter of the coating portion are recognized and inspected by image processing, and the discharge pressure and discharge time of the coating head are adjusted based on the inspection result. In the image processing of the application part, for example, the determination may be made based on the difference image of the gray value of the image before application and after application, or of course, the shape or diameter of the application part is recognized only by the image after application. You may do it.

  Further, the control device (or management computer) of the mounter module 12 performs image processing on the shutter speed and / or illumination conditions (illumination intensity, illumination method, etc.) of the camera according to the type of the viscous liquid material applied by the application head. It also has a function to set conditions that are easy to recognize. In addition, in the production job, it is possible to set the substrate color data of the application position of the circuit board on which the viscous liquid material is applied, and the shutter speed and / or illumination conditions of the camera are taken into consideration both the viscous liquid material and the substrate color. It is possible to set conditions that are easy to recognize by image processing. Therefore, in the production job, imaging condition data for setting the type of roll paper, the shutter speed of the camera, and the illumination condition is registered for each type of viscous liquid used.

  Also, if the operator has a function of inputting the type of the viscous liquid used for the coating operation, and imaging condition data corresponding to the input type of the viscous liquid exists, the imaging condition data is used. Further, if there is no imaging condition data corresponding to the type of the input viscous liquid material, the default imaging condition data may be used, or the operator may newly register the imaging condition data. .

  Further, the control device (or management computer) of the mounting machine module 12 performs the trial coating in the period from the trial application of the viscous liquid material to the roll paper and the end of the inspection to the start of the next trial coating. There is also a function of automatically performing the operation of winding the roll paper on the take-up reel 41 and preparing for the next trial coating.

  In the embodiment described above, according to the type of the viscous liquid material to be applied, a roll paper that easily recognizes the application portion of the viscous liquid material by image processing is selected from a plurality of types of roll paper and is displayed on the display device 19. If the roll paper displayed on the display device 19 before the start of the coating operation is different from the roll paper 40 set in the application state inspection unit 32, the operator displays the roll paper 40 on the display device. Instead of the roll paper of the type shown in FIG. 19, the viscous liquid material may be trial-coated, and the coated portion may be imaged with a camera and inspected. As a result, it is possible to increase the luminance difference (brightness difference) between the application portion of the viscous liquid material and the background roll paper, and to perform image processing, and to improve the image recognition accuracy of the application portion of the viscous liquid material on the roll paper. The coated portion can be inspected with high accuracy.

  Furthermore, in this embodiment, since the shutter speed and illumination conditions of the camera are set to conditions that can be easily recognized by image processing according to the type of the viscous liquid to be applied by the application head, the viscous liquid on the roll paper is set. The image recognition accuracy of the coated portion can be further improved.

  Further, roll paper is used as a test coating member, and the roll paper is set to the application state inspection unit 32 so as to be detachable. The application state inspection unit 32 includes a portion of the roll paper to which the viscous liquid material is applied. Since the take-up reel 46 and the motor 42 that rotationally drives the take-up reel 46 are provided, the viscous liquid material is trial-coated on the roll paper, and after the inspection is completed, the next trial coating is started. During this period, the roll paper is wound on the take-up reel 46 only for the trial-coated portion, and the preparation for the next trial coating can be automatically performed, thereby improving workability.

  In the present embodiment, the operator manually replaces the test coating member (roll paper) according to the display on the display device 19, but is provided with an automatic replacement mechanism that automatically replaces the test coating member. It is also good.

  Also, it is possible to select the type of roll paper by feeding and rewinding according to the type of viscous liquid material to be applied, assuming that one set of roll paper is a combination of multiple types of roll paper Anyway.

  In this embodiment, the application state inspection unit 32 is attached to the feeder set base 31 of the mounting machine module 12. However, the present invention may be applied to an apparatus dedicated to applying a viscous liquid material.

  Further, the trial coating member is not limited to roll paper, and other members such as a film and a plate may be used. In short, a member capable of applying a viscous liquid material may be used.

  DESCRIPTION OF SYMBOLS 12 ... Mounting machine module (component mounting machine), 14 ... Feeder, 15 ... Circuit board conveying apparatus, 16 ... Camera for imaging components, 17 ... Mounting head, 18 ... Upper frame, 19 ... Display apparatus, 20 ... Operation part, DESCRIPTION OF SYMBOLS 31 ... Feeder set stand, 32 ... Application | coating state inspection unit, 33 ... Nozzle cleaning apparatus, 34 ... Air receiving tray, 35 ... Nozzle height measuring sensor, 36 ... Air hose, 37 ... Air supply coupler, 40 ... Roll paper, 41 ... take-up reel, 42 ... motor, 45 ... guide plate, 47 ... roll paper presence / absence confirmation sensor, 48 ... take-up confirmation sensor, 49 ... take-up full sensor, 55 ... connector, 56 ... engagement pin

Claims (4)

Equipped with a coating head that applies a viscous liquid material to a circuit board. Before the start of the coating operation, the coating head applies the viscous liquid material to a test coating member, images the applied part with a camera, recognizes it by image processing, and inspects it. In the viscous liquid material coating apparatus
Viscous liquid material comprising production management means for selecting and notifying a trial coating member that can be easily recognized by image processing from a plurality of types of trial coating members according to the type of viscous liquid material to be applied Coating device.   2. The production management means according to claim 1, further comprising means for setting the shutter speed and / or illumination condition of the camera to a condition that can be easily recognized by image processing in accordance with a type of the viscous liquid to be applied. The viscous liquid material coating apparatus described. An application state inspection unit equipped with the trial coating member is provided,
The application state inspection unit is attached to a feeder set base of a component mounting machine in a replaceable manner with a feeder,
The viscous liquid material coating apparatus according to claim 1, wherein the coating head is attached to the component mounting machine so as to be replaceable with the mounting head. The test coating member is roll paper, and the roll paper is set to be detachable from the application state inspection unit.
The application state inspection unit is provided with a take-up reel that takes up a portion of the roll paper to which the viscous liquid material is applied, and a motor that rotates the take-up reel. The viscous liquid material coating apparatus according to any one of claims 1 to 3.

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