JP2013168404A - Component mounting device and component mounting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a component mounting device for restraining failures caused by an operation for mounting a component while a conveyance object is held at an operation position at an unstable state, and a method thereof.SOLUTION: Heigh of plural measurement points M set on a contact member 7 in contact with a carrier 3 is measured by a height sensor 18, and thickness N of the contact member 7 is added to the height of each of the measurement points M, so as to calculate height of a lower face 7a of the contact member 7. A determination section 25 determines whether or not the height of the lower face 7a of the contact member 7 is identical to the height of an upper face 3a of the carrier 3. When there is a portion determined as not identical to the height of the upper face, the determination section outputs display command signals including position information of the portion to a display processing section 27. The display processing section 27 informs an operator of the fact that there is the portion on the lower face 7a of the contact member 7 determined as not identical to the upper face 3a of the carrier 3 by outputting together with an image explicitly specifying its objective portion to an image indicator 28 and displaying the image.

Description

  The present invention relates to a component mounting apparatus and a component mounting method for mounting a component on a substrate.

  The component mounting apparatus uses a substrate or a plate-like carrier on which the substrate is placed as an object to be conveyed, conveys the component adsorbed by an adsorption nozzle provided in the mounting head to an electrode on the substrate after being conveyed to a predetermined work position by a conveying means. To implement. Such a component mounting apparatus is provided with a mechanism for holding the transport object transported to the work position in a stable state at the work position.

  As an example of this mechanism, an abutting member provided so as to be movable up and down above both sides of the conveyance target conveyed to the work position is lowered with respect to the conveyance target and applied to the upper surface of both sides of the conveyance target. There is a thing to contact (for example, patent document 1). According to this mechanism, it is possible to realize a stable holding state of the transport object by bringing the upper surface of the transport object into contact with the lower surface of the contact member.

JP 2006-186077 A

  However, in the case where there is a bulge (such as a dent) due to a flaw or a foreign matter adhering to the region on both sides of the upper surface of the conveyance object (the region contacting the lower surface of the contact member), A substrate that causes vibration during operation of the device when the object to be conveyed is held in an unstable state because the upper surface of both sides of the object to be conveyed and the lower surface of the abutting member are not in close contact with each other and the component is mounted as it is. There is a problem that there is a possibility that a problem such as a decrease in mounting position accuracy due to the positional deviation occurs.

  Accordingly, the present invention provides a component mounting apparatus and a component mounting method that suppress the occurrence of problems that may occur when a component mounting operation is performed while an object to be conveyed is held in an unstable state at a work position. Objective.

  The component mounting apparatus according to claim 1 is a component mounting apparatus that mounts a component supplied from a component supply unit on a substrate by suction with a suction nozzle provided in the mounting head, wherein the substrate or a carrier on which the substrate is placed is mounted. As a conveyance object, a conveying means that supports both sides from below and conveys it to a predetermined work position, and the upper part of both sides of the conveyance object conveyed to the predetermined work position by the conveyance means can freely move up and down. An abutting member that moves downward with respect to the conveyance object conveyed to the predetermined work position and abuts on both sides of the upper surface of the conveyance object conveyed to the predetermined work position; A storage unit for storing the height of the upper surface of the conveyance object conveyed to the work position, and the height of the upper surface of the abutting member after moving downward with respect to the conveyance object conveyed to the predetermined work position The height measuring means to measure It is determined whether or not the height of the lower surface of the contact member obtained from the height of the upper surface of the contact member measured by the height measuring means matches the height of the upper surface of the conveyance object stored in the storage unit. And the height of the lower surface of the abutting member obtained from the height of the upper surface of the abutting member measured by the height measuring means by the determining means, and the upper surface of the conveyance object stored in the storage unit And informing means for informing that it is determined that the height does not coincide with the height of.

  The component mounting method according to claim 2 is a component mounting method in which a component supplied from a component supply unit is sucked by a suction nozzle provided in a mounting head and mounted on a substrate, and the substrate or the carrier on which the substrate is placed is mounted. As a transport object, a transport process for supporting both sides of the transport object from below and transporting it to a predetermined work position, and being able to move up and down above both sides of the transport object transported to the predetermined work position in the transport process A contact step in which the provided contact member is moved down with respect to the transport object transported to the predetermined work position to contact both sides of the upper surface of the transport object; A height measurement step of measuring the height of the upper surface of the contact member in contact with an object, and a height of the contact member obtained from the height of the upper surface of the contact member measured in the height measurement step. The height of the bottom surface is recorded on the storage unit. A determination step for determining whether or not the height of the upper surface of the transported object coincides with the height of the lower surface of the contact member obtained from the height of the upper surface of the contact member measured in the determination step Includes a notifying step of notifying that when it is determined that the height does not match the height of the upper surface of the conveyance object stored in the storage unit.

  In the present invention, in a state where the abutting members are brought into contact with both sides of the upper surface of the conveyance object and the conveyance object is held at the work position, the upper surface of the both sides of the conveyance object has a bulge due to scratches or foreign matter. If the height of the upper surface of the object to be transported does not match the height of the lower surface of the contact member, a notification to that effect is made, so the work that received the notification Personnel can take appropriate measures such as changing the object to be transported or removing foreign matter adhering to the upper surface, so that the part mounting work must be performed while the object to be transported is held in an unstable state. Can be prevented, and the occurrence of defects can be suppressed.

The perspective view of the component mounting apparatus of one embodiment of this invention The top view of the component mounting apparatus of one embodiment of this invention The side view of the component mounting apparatus of one embodiment of this invention The block diagram which shows the structure of the control system of one embodiment of this invention (A) (b) The elements on larger scale of the component mounting apparatus of one embodiment of this invention The figure which shows the operation | movement flow of one embodiment of this invention (A) (b) (c) Operation explanatory diagram of one embodiment of the present invention (A) The elements on larger scale of the component mounting apparatus of one embodiment of this invention (b) The side view of one embodiment of this invention

  First, the overall structure of the component mounting apparatus 1 will be described with reference to FIGS. The component mounting apparatus 1 carries a substrate 2 having an electrode (not shown) on its upper surface in one direction (X direction) in a horizontal plane and positions and holds the substrate 2 at a predetermined work position. 2 is a device that mounts a component P such as an electronic component on the base 4, a plurality of tape feeders 9 as a base 4, a substrate transport holding unit 5 provided on the base 4, and a component supply unit that supplies the component P The mounting head 14 is moved by the head moving mechanism 10, and the control device 20 (FIG. 4) that controls the operation of each unit is provided.

  The substrate transport holding unit 5 is attached to a pair of transport conveyor support members 6 extending in the X direction so as to face the Y direction orthogonal to the X direction on the base 4, and is a rectangular flat plate on which the substrate 2 or the substrate 2 is placed. As a power unit provided on each of the pair of transport conveyor support members 6 in addition to the transport conveyor 6a as a transport means for supporting the both ends of the carrier 3 from below and transporting it to a predetermined work position. The contact member 7 can be moved up and down (arrow a in FIG. 3) by the cylinder 8. The contact member 7 is provided so as to be movable up and down above both ends of the carrier 3 conveyed to a predetermined work position by the conveyor 6a, and moves downward with respect to the carrier 3 conveyed to the predetermined work position (see FIG. 7 (a), the lower surface 7a abuts on both sides of the upper surface 3a of the carrier 3. In the present embodiment, a carrier 3 on which a plurality of substrates 2 are placed on the upper surface 3a is used as a conveyance object.

  1 and 2, the tape feeders 9 are arranged in the X direction at both ends of the base 4 facing the Y direction. Each tape feeder 9 continuously supplies the component P to the component supply port 9a provided in the upper end part by the side of the conveyance conveyor 6a.

  The head moving mechanism 10 includes a Y-axis table 11 that extends in the Y direction at one end of the base 4 in the X direction, and extends in the X direction. One end of the head moving mechanism 10 is attached to the Y axis table 11. The X-axis table 12 is movable along the X-axis table 12 and the movable plate 13 is movable on the X-axis table 12 in the X direction. The mounting head 14 includes a plurality of holding heads 15, and suction nozzles 15 a that can suck and release the component P are mounted below each holding head 15 (FIG. 3). The suction nozzle 15a can be moved up and down individually (arrow b) by an elevating mechanism (not shown) built in the mounting head 14.

  1 and 2, a component recognition camera 16 is disposed between the tape feeder 9 and the conveyor support member 6. The mounting head 14 is equipped with a board recognition camera 17 that is located on the lower surface side of the X-axis table 12 and moves integrally therewith. Further, the moving plate 13 is equipped with a height sensor 18 that can detect the height of the upper surface 7b of the contact member 7 to be measured without contact.

  Next, the configuration of the control system will be described with reference to FIG. The control device 20 provided in the component mounting apparatus 1 includes a mechanism control unit 21, an image processing unit 22, a height measurement unit 23, a height calculation processing unit 24, a determination unit 25, a storage unit 26, and a display processing unit 27. ing. The mechanism control unit 21 controls the operation of the conveyor 6a and the cylinder 8 to convey the carrier 3 and move the contact member 7 up and down, and controls the operation of the head moving mechanism 10 (the X-axis table 12 relative to the Y-axis table 11). The mounting head 14 is moved by performing movement control and movement control of the moving plate 13 with respect to the X-axis table 12.

  Further, the mechanism control unit 21 controls the operation of the lifting mechanism described above to raise and lower the suction nozzle 15a with respect to the holding head 15, and controls the suction mechanism (not shown) built in the mounting head 14 to perform suction. The nozzle 15a is caused to suck the component P. Further, the mechanism control unit 21 controls the imaging operation of the component recognition camera 16 and the board recognition camera 17, and the image data obtained by the imaging operation of each camera is input to the image processing unit 22 for image recognition processing.

  The height sensor 18 includes a light projecting unit for projecting inspection light and a light receiving unit for receiving reflected light of the inspection light projected by the light projecting unit, and is controlled by the height measuring unit 23 to be inspected. The height of the measurement object is derived by the principle of triangulation. In the present embodiment, as shown in FIGS. 5A and 7B, a plurality of locations on the contact member 7 are set as measurement points M, and are moved downward by the cylinder 8 (FIG. 7A ) And the lower surface 7a of the contact member 7 is in contact with the upper surface 3a of the carrier 3, and the height measuring unit 23 projects the inspection light from the height sensor 18 toward the measurement point M. Then, the reflected light is received (arrow d in FIG. 7B), and the height of the upper surface 7b of the contact member 7 at the position of the measurement point M is measured. In the above configuration, the height sensor 18 and the height measuring unit 23 measure the height of the upper surface 7b of the abutting member 7 after moving downward with respect to the carrier 3 conveyed to a predetermined work position. It is a means.

  The height calculation processing unit 24 adds the thickness N (FIG. 3) of the contact member 7 stored in the storage unit 26 to the height of each measurement point M measured by the height measuring unit. A process of calculating the height of the lower surface 7a of the contact member 7 positioned vertically below each measurement point M is executed.

  The determination unit 25 is mounted on the conveyor 6 a stored in advance in the storage unit 26 and the height of the lower surface 7 a of the contact member 7 positioned vertically below each measurement point M calculated by the height calculation processing unit 24. The height (regular height) of the upper surface 3a of the carrier 3 in the placed state is compared, and it is determined whether or not they match. As a result, if there is a part determined not to match, a display command signal including the position information of the target part is output to the display processing unit 27. The determination unit 25 determines the height of the upper surface 3a of the carrier 3 in which the height of the lower surface 7a of the contact member 7 obtained from the height of the upper surface 7b of the contact member 7 measured by the height measuring means is stored in the storage unit 26. It is a judgment means for judging whether or not the same.

  The display processing unit 27 receives the display command signal from the determination unit 25 and indicates that there is a portion that is determined not to coincide with the height of the upper surface 3a of the carrier 3 on the lower surface 7a of the contact member 7. The image is displayed on an image display device 28 such as a monitor connected to the control device 20 together with an image that clearly indicates the position of the control device 20 so as to notify the worker. In the display processing unit 27 and the image display 28, the height of the lower surface 7 a of the contact member 7 obtained from the height of the upper surface 7 b of the contact member 7 measured by the height measuring unit is determined in the storage unit 26 by the determination unit. When it is determined that the stored height of the upper surface 3a of the carrier 3 does not coincide with the stored height, it is a notification means for performing notification to that effect.

  The component mounting apparatus 1 of the present invention is configured as described above. Next, the operation will be described with reference to FIGS. First, the control device 20 drives the transfer conveyor 6a to transfer the carrier 3 supplied from an upstream device (not shown) to a predetermined work position while supporting both sides from below (see FIG. 6). ST1 conveying step shown). Next, as shown in FIG. 7A, the control device 20 drives the cylinder 8 to move the contact member 7 downward (arrow c) toward the carrier 3 conveyed to a predetermined work position. Then, the lower surface 7a of the contact member 7 is brought into contact with both side portions of the upper surface 3a of the carrier 3 (contact process in ST2). Here, when no foreign matter or the like is present in the region of the upper surface 3a of the carrier 3 that contacts the lower surface 7a of the contact member 7, both sides of the upper surface 3a of the carrier 3 are in close contact with the lower surface 7a of the contact member 7 (surface contact). (That is, the height of the upper surface 3a of the carrier 3 and the height of the lower surface 7a of the contact member 7 are the same), and the carrier 3 is held between the contact member 7 and the transport conveyor 6a in a state of being kept horizontal (FIG. 7A). ).

  Next, as shown in FIG. 7B, the control device 20 drives the head moving mechanism 10 to move the height sensor 18 in the horizontal direction, so that the contact member 7 in a state of being in contact with the carrier 3. The height of the upper surface 7b (height about a plurality of measurement points M) is measured (ST3 height measurement step). Next, a calculation process for adding the thickness N of the contact member 7 stored in the storage unit 26 to the measured height of each measurement point M is executed by the height calculation processing unit 24, and each measurement point M The height of the lower surface 7a of the contact member 7 positioned vertically below is calculated (ST4 lower surface height calculation step of the contact member).

  Then, it is determined whether or not the calculated height of the lower surface 7a of the contact member 7 positioned vertically below each measurement point M matches the height of the upper surface 3a of the carrier 3 stored in the storage unit 26. Determination is performed by the determination unit 25 (determination step of ST5). Here, if both sides of the upper surface 3a of the carrier 3 are in close contact with the lower surface 7a of the contact member 7, the calculated values of the height of the lower surface 7a of the contact member 7 and the height of the upper surface 3a of the carrier 3 are calculated. Are the same.

  8 (a) and 8 (b) are due to the presence of a bulge and foreign matter (hereinafter referred to as "convex portion Q") due to scratches at one end portion (right side of the drawing) of the upper surface 3a of the carrier 3. The state in which the carrier 3 is held at the working position while the gap R is generated between the contact member 7 and the carrier 3 at the one end is shown. Thus, when the convex part Q exists in the area | region on the carrier 3 contact | abutted with the lower surface 7a of the contact member 7, the height of the lower surface 7a of the contact member 7 and the height of the upper surface 3a of the carrier 3 correspond. It is judged by the judgment part 25 that there is no.

  In addition, as an example of the cause of the rise due to the scratch, it may be caused by accidentally hitting the outer peripheral portion of the carrier 3 against a work table or the like when the worker handles it. Moreover, as an example of a foreign material, components, such as an electronic component which fell (attached) on the carrier 3 for some reason, are mentioned.

  As described above, due to the presence of the convex portion Q on the upper surface 3 a of the carrier 3, the height of the lower surface 7 a of the contact member 7 is the height of the upper surface 3 a of the carrier 3 stored in the storage unit 26. If there is a part determined by the determination unit 25 as not matching, the determination unit 25 sends a display command signal including the position information of the target part determined not to match to the display processing unit 27. Output. The display processing unit 27 that has received the display command signal clearly indicates that there is a part on the lower surface 7 a of the contact member 7 that is determined not to coincide with the height of the upper surface 3 a of the carrier 3. The information is output to the image display 28 and displayed together with the image to notify the worker (notification process of ST6), and the component mounting on the board 2 placed on the carrier 3 is canceled and the process is terminated. In addition to the visual notification by the image display 28, the notification to the worker may be performed in combination with an audible notification by a warning sound.

  Further, as an image displayed on the image display 28, in addition to a display that the height of the lower surface 7a of the contact member 7 and the height of the upper surface 3a of the carrier 3 do not coincide with each other, the lower surface 7a of the contact member 7 By using a plane image of the carrier 3 with check marks at locations where it is determined that the heights do not match, it is possible to quickly and easily grasp at which position the convex portion Q is generated on the carrier 3. be able to.

  The worker who has confirmed the image displayed on the image display 28 interrupts the mounting operation, checks whether the upper surface 3a of the carrier 3 is swelled by a scratch or has no foreign matter attached thereto, and the like. When a swell or the like is found, the worker places the board 2 on the new carrier 3 and puts the replaced carrier 3 on the conveyor 6a again.

  On the other hand, in (ST5), the height of the lower surface 7a of the abutting member 7 positioned vertically below each measurement point M coincides with the height value of the upper surface 3a of the carrier 3 stored in the storage unit 26. If the determination unit 25 determines that the board 2 is present, the control device 20 drives the head moving mechanism 10 to move the board recognition camera 17 mounted on the mounting head 14 to an arbitrary position above the board 2. Is recognized (substrate recognition process in ST7), and the positional deviation of the substrate 2 from the reference position is calculated using the recognition result.

  Next, the control device 20 drives the head moving mechanism 10 to move the mounting head 14 to the component supply port 9a of the tape feeder 9, and sucks and holds the component P supplied from the component supply port 9a by the suction nozzle 15a. (ST8 component adsorption step). Next, the control device 20 drives the head moving mechanism 10 to move the mounting head 14 above the component recognition camera 16, and captures and recognizes the component P that has been sucked by the suction nozzle 15a (ST9 component). Recognition step), and using this recognition result, the displacement of the suction position of the component P with respect to the suction nozzle 15a is calculated.

  Then, as shown in FIG. 7C, the control device 20 drives the head moving mechanism 10 to move the mounting head 14 to an arbitrary position on the substrate 2, and lowers the suction nozzle 15a at that position (arrow e). Then, the suction of the component P by the suction nozzle 15a is released at the lowest position and the component P is mounted on the substrate 2 (ST10 mounting step). When mounting the component P on the board 2, the image processing unit 22 performs image recognition processing on the image data obtained by the imaging operations of the component recognition camera 16 and the board recognition camera 17, and based on the result of the image recognition processing. This is executed after correcting the lowering position of the suction nozzle 15a in the plane direction.

  If the component P is mounted on the board 2, the control device 20 drives the cylinder 8 to raise the contact member 7, thereby releasing the contact between the carrier 3 and the contact member 7. And the control apparatus 20 conveys the carrier 3 to a downstream apparatus (not shown) by driving the conveyance conveyor 6a (conveying process to the downstream side of ST11), and the mounting operation in the component mounting apparatus 1 is completed. .

  As described above, in the present embodiment, the height of the lower surface 7a of the contact member 7 in the state where the lower surface 7a of the contact member 7 is in contact with the upper surface 3a of the carrier 3 is placed on the conveyor 6a. It is determined whether or not the height of the upper surface 3a of the carrier 3 in the state matches, and when it is determined that they do not match, the fact is displayed on the image display 28 to notify the worker. Therefore, the worker who has received the notification immediately confirms the upper surface 3a of the carrier 3 and can take measures such as exchanging the carrier 3 in the event that swell or adhesion of foreign matter is found due to scratches. As a result, it is possible to prevent the carrier 3 from being held in the work position in an unstable state and performing a mounting operation, and to suppress the occurrence of a defective mounting substrate.

  In the present embodiment, the transport object placed on the transport conveyor 6a is the carrier 3, but when the substrate is the transport object, the target object that contacts the lower surface 7a of the contact member 7 is the substrate. Further, the storage unit 26 stores the height of the upper surface of the substrate in the state of being placed on the conveyor 6a, and the determination unit 25 obtains the height from the height of the upper surface 7b of the contact member 7 measured by the height measuring means. It is determined whether or not the height of the lower surface 7a of the contact member 7 is equal to the height of the upper surface of the substrate stored in the storage unit 26.

  In the above-described mounting form, the value obtained by adding the thickness N of the contact member 7 to the height of the upper surface 7b of the contact member 7 measured by the height sensor 18 is used as the conveyance object (carrier 3). Alternatively, the height of the upper surface 7b of the abutting member 7 measured by the height sensor 18 is determined by comparing the height of the upper surface of the substrate 30) and determining whether or not there is a foreign substance or the like. The height is compared with the value obtained by adding the thickness N of the contact member 7 to the height of the upper surface of the conveyance object, and the presence or absence of foreign matter or the like is determined based on whether or not the two match. Also good.

  According to the component mounting apparatus and the component mounting method of the present invention, it is possible to suppress the problem of mounting position shift due to the partial mounting operation being performed while the conveyance target is held in an unstable state, and the component is mounted on the board. This is useful in the field of mounting components.

1 Component mounting equipment 2,30 Board (object to be transported)
3 Carrier (object to be transported)
6a Conveyor 7 Contact member 9 Tape feeder 14 Mounting head 15a Adsorption nozzle 18 Height sensor 23 Height measurement unit 25 Judgment unit 26 Storage unit 27 Display processing unit 28 Image display

Claims (2)

A component mounting apparatus that sucks a component supplied from a component supply unit by a suction nozzle provided in a mounting head and mounts the component on a substrate,
A transport means for transporting a substrate or a carrier on which the substrate is placed as a transport object, and supporting the both sides from below to a predetermined work position;
The upper and lower sides of the object to be conveyed conveyed to the predetermined work position by the conveying means are provided so as to be movable up and down, and move downward with respect to the object to be conveyed conveyed to the predetermined work position. An abutting member that abuts on both sides of the upper surface of the conveyance object conveyed to the work position;
A storage unit for storing the height of the upper surface of the conveyance object conveyed to the predetermined work position;
A height measuring means for measuring the height of the upper surface of the abutting member after moving downward with respect to the conveyance object conveyed to the predetermined work position;
Whether the height of the lower surface of the contact member obtained from the height of the upper surface of the contact member measured by the height measuring means matches the height of the upper surface of the conveyance object stored in the storage unit. A judging means for judging;
The height of the lower surface of the contact member obtained from the height of the upper surface of the contact member measured by the height measuring means matches the height of the upper surface of the conveyance object stored in the storage unit. A component mounting apparatus comprising: an informing means for informing that when it is determined that there is not. A component mounting method for mounting a component supplied from a component supply unit on a substrate by suction by a suction nozzle provided in the mounting head,
A substrate or a carrier on which a substrate is placed as an object to be conveyed, a conveyance step for supporting both sides from below and conveying the substrate to a predetermined work position,
In the transporting step, a contact member provided so as to be movable up and down above both sides of the transport object transported to the predetermined work position is moved downward with respect to the transport object transported to the predetermined work position. A contact step of contacting both sides of the upper surface of the transport object;
A height measurement step of measuring the height of the upper surface of the contact member in contact with the conveyance object in the contact step;
Whether or not the height of the lower surface of the contact member obtained from the height of the upper surface of the contact member measured in the height measurement step matches the height of the upper surface of the conveyance object stored in the storage unit. A judging process for judging;
In the determination step, it is determined that the height of the lower surface of the contact member obtained from the measured height of the upper surface of the contact member does not coincide with the height of the upper surface of the conveyance object stored in the storage unit. A component mounting method comprising: a notification step of performing notification to that effect.

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