WO2016046967A1

WO2016046967A1 - Maintenance notification system and maintenance notification method

Info

Publication number: WO2016046967A1
Application number: PCT/JP2014/075674
Authority: WO
Inventors: 敏也鈴木
Original assignee: 富士機械製造株式会社
Priority date: 2014-09-26
Filing date: 2014-09-26
Publication date: 2016-03-31
Also published as: JPWO2016046967A1; JP6476196B2

Abstract

In this invention, a component mounting machine is equipped with an image recognition device (38) for performing image recognition on a component picked up by the pickup nozzle (19), and, based on the recognition result from this image recognition device (38), the component mounting machine corrects the pickup position offset of the component picked up by the pickup nozzle (19) and mounts the component on a printed circuit board. Then, the component mounting machine assesses the state of variation in a plurality of recognition results from the image recognition device (38) (the state of variation in the amounts of component pickup position offset), and based on the assessed state of variation in the plurality of recognition results, assesses whether or not the feeder (36) and/or the pickup nozzle (19) needs maintenance. As a result, if it has been assessed that maintenance for the feeder (36) and/or the pickup nozzle (19) is necessary, an operator is notified of this through display and/or audio.

Description

Maintenance guidance system and maintenance guidance method

The present invention relates to a maintenance guidance system and a maintenance guidance method that determine whether or not maintenance of a feeder set on a component mounting machine is necessary and prompt maintenance for the worker when maintenance is necessary.

For example, in the component mounting machine disclosed in Patent Document 1 (Japanese Patent Application Laid-Open No. 2008-16524), the number of suction operations of a component is counted for each suction nozzle, and the number of suction operations is written in an RF tag provided in each suction nozzle. When the number of suction operations is read from the RF tag of each suction nozzle by a reader / writer provided on the base of the component mounting machine, and when the number of suction operations of any suction nozzle reaches the maintenance value, the maintenance timing of the suction nozzle The operator has been informed by a display or voice so as to encourage the operator to perform maintenance on the suction nozzle.

In addition, in the component mounting machine disclosed in Patent Document 2 (Japanese Patent Laid-Open No. 2010-98213), the maintenance time is determined based on the number of operations (such as the number of component supply operations) of a maintenance target location such as a feeder and the usage time, and maintenance is performed. The maintenance target part that has reached the time is displayed on the image display unit so as to prompt the operator to perform maintenance on the maintenance target part.

Further, in the component mounting machine disclosed in Patent Document 3 (Japanese Patent Laid-Open No. 2013-197219), the movement distance of the mounting head is integrated, and when the movement distance reaches a threshold value, maintenance of the mounting head moving mechanism (grease) is performed. It is determined that the replenishment or the like is necessary, and a message to that effect is displayed on the display device to prompt the operator to maintain the mounting head moving mechanism.

JP 2008-16524 A JP 2010-98213 A JP 2013-197219 A

By the way, because the characteristics of suction nozzles and feeders of component mounters vary due to manufacturing tolerances, deterioration with time, etc., even when the same type is used, the time when maintenance is actually required (maintenance time) varies due to the characteristics variation. come.

However, in each of Patent Documents 1 to 3, the maintenance time is determined by the number of operations of the maintenance target (the number of suction operations and the number of parts supply operations) such as the suction nozzle and feeder, the usage time, and the movement distance. Even if there is a variation in the characteristics of the maintenance target, the maintenance time is uniformly determined regardless of the variation in the characteristics. For this reason, in the past, in order to prevent the maintenance work for all maintenance objects from being delayed from the actual maintenance time, it is assumed that the maintenance interval is within the range of the characteristic dispersion. It is necessary to set the maintenance time earlier according to the shorter maintenance target. As a result, the maintenance target is often maintained before the actual maintenance time arrives, and the number of maintenance times increases more than necessary, which causes a decrease in productivity.

Accordingly, the problem to be solved by the present invention is to provide a maintenance guidance system and a maintenance guidance method capable of performing maintenance at an appropriate time individually according to variations in feeder characteristics and improving productivity by reducing the number of maintenance. That is.

In order to solve the above problems, the present invention requires maintenance by determining whether or not the feeder needs to be maintained in a component mounting machine that sucks a component supplied by the feeder onto a suction nozzle and mounts it on a circuit board. A maintenance guidance system and a maintenance guidance method that sometimes prompts an operator for maintenance, wherein the component mounter includes an image recognition device that recognizes an image of a component sucked by a suction nozzle, based on a recognition result of the image recognition device. The component sucked by the suction nozzle is configured to be mounted on the circuit board by correcting the suction position deviation, and the variation state of the plurality of recognition results of the image recognition device is determined, and the plurality of recognized recognition results The necessity of feeder maintenance is determined based on the variation status of the feeder, and as a result, feeder maintenance is required It is characterized in that to guide it to the operator when the litho determined.

Generally, an image recognition device that recognizes an image of a component sucked by the suction nozzle is mounted on the component mounting machine in order to determine a displacement of the suction position of the component sucked by the suction nozzle. The present invention pays attention to the fact that the variation of the plurality of recognition results of the image recognition device increases as the maintenance time approaches, and the feeder maintenance is performed based on the variation state of the plurality of recognition results of the image recognition device. When it is determined that the feeder needs to be maintained, the operator is informed of the necessity of maintenance. Maintenance can be performed at the same time, and the number of maintenance can be reduced to improve productivity.

In the present invention, when determining the variation state of a plurality of recognition results, for each suction nozzle (for each nozzle holder), for each type of component sucked by the suction nozzle, for each feeder, for each feeder width, for each component feed pitch It is preferable to determine a variation state of a plurality of recognition results for at least one of the above.

Furthermore, the present invention sets a first determination criterion for determining a variation state of a plurality of recognition results, and a second determination criterion for determining a variation state larger than the first determination criterion, and is equal to or less than the first determination criterion. Is determined as the area where the maintenance is not required, the area from the first determination criterion to the second determination criterion is the area for warning the maintenance, and the area above the second determination criterion is determined as the need for maintenance. You may make it be the area | region to perform. In this way, it is possible to notify the operator of the maintenance before the maintenance time comes and to prepare the operator for the maintenance, so that the maintenance work can be performed efficiently.

Specifically, when it is determined that the variation state of a plurality of recognition results is a variation state from the first determination criterion to the second determination criterion, a maintenance notice is given so that maintenance is performed between productions. When the operator is guided and it is determined that the variation state of the plurality of recognition results is a variation state equal to or greater than the second determination criterion, the worker may be guided to perform maintenance immediately.

Further, in the present invention, a maintenance target part may be determined based on a plurality of recognition result variation states, and the maintenance target part may be guided to an operator. In this way, maintenance work can be performed efficiently.

FIG. 1 is a longitudinal sectional view showing a configuration of a main part of a component mounter showing an embodiment of the present invention. FIG. 2 is a block diagram schematically showing the configuration of the control system of the component mounter. FIG. 3 is a partially enlarged top view of the component supply tape. FIG. 4 is a flowchart (part 1) showing the flow of processing of the maintenance guidance program. FIG. 5 is a flowchart (part 2) showing the flow of processing of the maintenance guidance program. FIG. 6 is a diagram showing the relationship between the component size, the first determination criterion, and the second determination criterion.

Hereinafter, an embodiment embodying a mode for carrying out the present invention will be described.
First, a schematic configuration of the whole component mounter will be described with reference to FIGS. 1 and 2.

The X-axis slide 11 is provided so as to be slidable in the X-axis direction (left-right direction in FIG. 1) by the X-axis ball screw 12, and the Y-axis slide 13 is moved by the Y-axis ball screw 14 relative to the X-axis slide 11. It is provided so as to be slidable in the Y-axis direction (perpendicular to the plane of FIG. 1). The X-axis ball screw 12 and the Y-axis ball screw 14 are driven by an X-axis motor 15 (see FIG. 2) and a Y-axis motor 16 (see FIG. 2), respectively.

The Y-axis slide 13 is provided with a mounting head 17, and a nozzle holder 18 is provided on the mounting head 17 so as to be movable up and down in the Z-axis direction (vertical direction) via a Z-axis drive mechanism (not shown). One or a plurality of suction nozzles 19 are attached to the nozzle holder 18 downward. The Z-axis drive mechanism is driven by a Z-axis motor 20 (see FIG. 2).

On the other hand, the X-axis slide 11 is provided with a parts camera 23 (camera for imaging parts) facing downward from the lower surface side of the part sucked by the suction nozzle 19 through a pair of reflecting

mirrors

21 and 22. . A ring-shaped illumination device 24 for illuminating the component sucked by the suction nozzle 19 from the lower surface side is provided above the reflecting mirror 21 positioned below the component sucked by the suction nozzle 19.

As shown in FIG. 2, the control device 31 of the component mounting machine includes an input device 32 such as a keyboard, a mouse, and a touch panel, a display device 33 such as a liquid crystal display and a CRT, and maintenance guides shown in FIGS. 4 and 5 described later. A storage device 34 and the like for storing programs, image processing component data, and the like are connected. In addition, the component mounter includes a board transport device 35 that transports the circuit board, a feeder 36 that supplies components to be mounted on the circuit board, and a mark camera 37 that captures an imaging target site such as a reference position mark on the circuit board Mark imaging camera) and the like are provided.

The control device 31 of the component mounter controls the operation of sucking the component supplied from the feeder 36 to the suction nozzle 19 and mounting it on the circuit board during operation of the component mounter. Further, the control device 31 of the component mounting machine is equipped with an image recognition device 38 for processing an image captured by the parts camera 23 or the mark camera 37, and moves the component sucked by the suction nozzle 19 to a mounting position on the circuit board. On the way, the part is picked up by the parts camera 23, and the picked-up image is processed by the image recognition device 38 to determine the sucking position deviation amount and the picking posture of the part. Although not shown, the component mounting line includes a plurality of component mounting machines, a solder printing machine, an inspection machine, and the like, and the production of these devices is managed by a production management host computer.

Incidentally, as shown in FIG. 3, the component supply tape 41 set in the feeder 36 is formed with cavities 42 for accommodating the components at a predetermined pitch in the tape feeding direction, along one side edge of the component supply tape 41. The sprocket holes 43 formed at a constant pitch are meshed with the sprocket teeth (not shown) for feeding the tape pitch of the feeder 36 to feed the pitch. In general, when the state of the feeder 36 is good, the components in the cavity 42 of the component supply tape 41 are in a stable position. However, if the feeder 36 is not in good condition, the acceleration when pitch feeding the component supply tape 41 is not stable, so that the position of the component in the cavity 42 may not be stable, or the pitch feed amount of the component supply tape 41 may be increased. Occurs, and as a result, there is a tendency for the amount of suction position deviation of the parts sucked by the suction nozzle 19 to increase.

As described above, in this embodiment, the image recognition device 38 that recognizes an image of a component sucked by the suction nozzle 19 is mounted in order to determine the amount of suction position shift of the component sucked by the suction nozzle 19. By paying attention, the control device 31 of the component mounter and the host computer share and execute the maintenance guide program shown in FIGS. 4 and 5 to be described later, and as a variation state of a plurality of recognition results of the image recognition device 38, The variation state of the suction position deviation amount of the component sucked by the suction nozzle 19 is determined, and the necessity of maintenance of the feeder 36 and / or the suction nozzle 19 is determined based on the determined variation state of the suction position shift amount of the component. As a result, when it is determined that maintenance of the feeder 36 and / or the suction nozzle 19 is necessary, it is displayed and / or displayed. It is to guide the operator in the voice. Here, “feeder 36 and / or suction nozzle 19” means “both or one of feeder 36 and suction nozzle 19”, and “display and / or voice” means “display and voice”. It means "both or either". The display and audio may be performed using any of the display device 33 of the component mounter, the sound source, the worker's portable terminal, and the like, and an electronic mail may be transmitted to the portable terminal.

In the present embodiment, a first determination criterion for determining the variation state of the suction position deviation amount of the component sucked by the suction nozzle 19 and a second determination criterion for determining a variation state larger than the first determination criterion are set. The area below the first criterion is determined as the area where maintenance is not required, the area from the first criterion to the second criterion is the area for notifying maintenance, and the area above the second criterion is required for maintenance. The area is determined to be present. In the present embodiment, the first determination criterion is set as shown in FIG. 6 in consideration of the fact that the component can be adsorbed almost stably if the adsorbing position deviation amount of the component adsorbed to the adsorption nozzle 19 is 40% or less. In view of the fact that the value corresponding to 40% of the part size is set, and that the suction position deviation amount of the part exceeds 50%, suction mistakes and suction posture abnormalities are likely to occur. The determination criterion is set to a value corresponding to 50% of the component size. The first determination criterion and the second determination criterion are as follows: for each suction nozzle 19 (for each nozzle holder 18), for each type of component sucked by the suction nozzle 19, for each feeder 36, for each width of the feeder 36, and for each component feed pitch. It is a changeable value for at least one of the above.

When the control device 31 or the host computer of the component mounting machine determines that the variation state of the suction position deviation amount of the component sucked by the suction nozzle 19 is a variation state from the first determination criterion to the second determination criterion. Guides the operator to notify the maintenance so that maintenance is performed between productions, and when it is determined that the variation state of the component adsorption position deviation amount is a variation state equal to or greater than the second determination criterion, The worker is guided to perform maintenance immediately. Here, the interval between production is, for example, at the time of setup change, at the start or end of daily production, at the start of morning component mounter, before resuming production at noon, at the end of night production, at the time of lot switching, etc. It means the time when production is cut off.

The above-described maintenance guidance of the present embodiment is shared and executed by the control device 31 of the component mounter and the host computer according to the maintenance guidance program shown in FIGS. When the maintenance guide program shown in FIGS. 4 and 5 is started, first, in step 101, after confirming a job to be produced next, the process proceeds to step 102 to start production of a component mounting machine.

Thereafter, the process proceeds to step 103, and the control device 31 of the component mounting machine images the component with the parts camera 23 while moving the component adsorbed by the adsorption nozzle 19 to the mounting position on the circuit board, and the captured image. Is processed by the image recognition device 38 to determine the amount of suction position deviation of the component.

Thereafter, the process proceeds to step 104, and information on the amount of suction position displacement of the component (suction position correction information) is transmitted from the control device 31 of the component mounter to the host computer. In the next step 105, the host computer statistically analyzes the received suction position deviation amount of the component, and determines the variation state of the suction position deviation amount of the component. At this time, the suction position of the component for each suction nozzle 19 (for each nozzle holder 18), for each type of component to be sucked by the suction nozzle 19, for each feeder 36, for each width of the feeder 36, and for each component feed pitch. The variation state of the deviation amount is determined. The processing in step 106 serves as a variation state determination unit.

Thereafter, the process proceeds to step 106, where it is determined whether or not the suction position of the component has varied beyond the first determination criterion. If it is determined that the suction position of the component has not varied beyond the first determination criterion, maintenance is performed. If it is determined that it is not necessary, the processes in steps 103 to 106 described above are repeated, and the process for determining the variation state of the component suction position deviation amount is continued.

Thereafter, if it is determined in the above step 106 that the suction position of the component has varied from the first determination criterion or more, the process proceeds to step 107 in FIG. 5 to determine whether the suction position of the component has varied from the second determination criterion or more. Determine whether. As a result, if it is determined that the suction position of the component is more than the second determination criterion, it is determined that maintenance is necessary, and the process proceeds to step 108, where the suction position of the component is determined for each suction nozzle 19 (nozzle holder 18). Whether or not each feeder 36 varies, and if it is determined that the suction position of the component varies for each suction nozzle 19, the process proceeds to step 109 and immediately the suction nozzle 19 The worker is guided to perform maintenance, and the operator is immediately prompted to remove the suction nozzle 19 from the component mounter and perform maintenance, and at the next step 110, the production of the component mounter is stopped. Then, in the next step 111, the worker waits until the suction nozzle 19 is maintained, and when the worker performs the maintenance of the suction nozzle 19, the process returns to step 102 in FIG. The process is resumed, and the processes after step 103 are executed again.

On the other hand, if it is determined in step 108 that the suction position of the component varies for each feeder 36, the process proceeds to step 112, where the operator is immediately guided to perform maintenance of the feeder 36, and immediately the component mounter. The operator is urged to remove the feeder 36 and perform maintenance, and at the next step 113, the production of the component mounting machine is stopped. Then, in the next step 114, the operator waits until the maintenance of the feeder 36 is performed. When the worker performs the maintenance of the feeder 36, the process returns to step 102 in FIG. 4 to resume the production of the component mounting machine. Then, the processing after step 103 is executed again.

If it is determined as “No” in step 107, that is, if it is determined that the suction position of the component varies in the region from the first determination criterion to the second determination criterion, it is necessary to notify the maintenance. In step 115, it is determined whether the suction position of the component varies for each suction nozzle 19 (each nozzle holder 18) or for each feeder 36, and the suction position of the component is determined by suction. If it is determined that the nozzles 19 vary, the process proceeds to step 116, and the maintenance notice of the suction nozzle 19 is guided to the operator so that the maintenance of the suction nozzle 19 is performed between productions. As a result, the operator removes the suction nozzle 19 from the component mounter during production and performs maintenance. In this case, the process after step 103 in FIG. 4 is executed again without stopping the production.

On the other hand, if it is determined in the above step 115 that the suction positions of the parts vary for each feeder 36, the process proceeds to step 117, and the maintenance notification of the feeder 36 is performed so that the feeder 36 is maintained between productions. Guide the person. As a result, the worker removes the feeder 36 from the component mounter and performs maintenance between productions. Also in this case, the process after step 103 in FIG. 4 is executed again without stopping the production.

The processes in steps 103 to 105 serve as a variation state determination unit, and the processes in steps 106 to 108, 112, and 115 serve as a maintenance necessity determination unit, and the

steps

109, 112, and 116 are performed. The process 117 serves as a guide means.

In the present embodiment described above, attention is paid to the fact that the variation in the suction position deviation amount of the parts sucked by the suction nozzle 19 increases as the maintenance time approaches, and the suction of the parts sucked by the suction nozzle 19 is increased. The necessity of maintenance of the feeder 36 and the suction nozzle 19 is determined based on the variation state of the positional deviation amount. As a result, when it is determined that maintenance of the feeder 36 or the suction nozzle 19 is necessary, it is displayed and / or voiced. Thus, the operator can be maintained at an appropriate time according to variations in the characteristics of the suction nozzle 19 and the feeder 36, and the number of maintenance can be reduced to improve productivity.

Furthermore, in this embodiment, a first determination criterion for determining the variation state of the suction position deviation amount of the component sucked by the suction nozzle 19 and a second determination criterion for determining a variation state larger than the first determination criterion. If the variation state of the amount of adsorption position deviation of the set part is a variation state from the first determination criterion to the second determination criterion, a maintenance notice is guided to the worker so that maintenance is performed between productions. As a result, it is possible to notify the operator of the maintenance before the maintenance time comes and to prepare the operator for the maintenance, so that the maintenance work can be performed efficiently.

4 and 5 may be executed only by the control device 31 of the component mounter. In this case, the process of step 104 may be omitted, and the statistical analysis of step 105 may be performed by the control device 31 of the component mounter.

In addition, a camera that captures an image of the component sucked by the suction nozzle 19 from the side is provided, and the image captured by this camera is processed to detect the component height. This component height is higher than the component height specified in the production job. If the deviation is more than the specified value, a component height correction instruction may be issued. In this way, it is possible to exclude the occurrence of component adsorption failure due to poor specification of the component height, and to accurately determine that the component adsorption state is not stable due to the feeder 36. Can do.

In addition, it goes without saying that the present invention can be implemented with various modifications within a range not departing from the gist, such as appropriately changing the configuration of the component mounting machine.

DESCRIPTION OF SYMBOLS 17 ... Mounting head, 18 ... Nozzle holder, 19 ... Suction nozzle, 31 ... Control apparatus, 36 ... Feeder, 37 ... Mark camera (camera for mark imaging), 38 ... Image recognition apparatus, 41 ... Component supply tape, 42 ... cavity

Claims

A maintenance guidance system that determines whether or not the feeder needs to be maintained in a component mounter that picks up a component supplied by the feeder with a suction nozzle and mounts it on a circuit board, and prompts the operator when the maintenance is necessary. Because
The component mounting machine includes an image recognition device that recognizes an image of a component sucked by the suction nozzle, and corrects a suction position shift of the component sucked by the suction nozzle based on a recognition result of the image recognition device. Configured to be mounted on a board,
Variation state determining means for determining a variation state of a plurality of recognition results of the image recognition device;
A maintenance necessity determination unit that determines whether the feeder needs to be maintained based on a plurality of recognition result variation states determined by the variation state determination unit;
A maintenance guidance system comprising: guidance means for guiding the maintenance to the operator when the maintenance necessity judgment means judges that the feeder needs maintenance.
The variation state determination unit is configured to display the plurality of recognition results for at least one of each suction nozzle, each type of component sucked by the suction nozzle, each feeder, each feeder width, and each component feed pitch. The maintenance guidance system according to claim 1, wherein a variation state is determined.
The maintenance necessity determination unit includes a first determination criterion for determining a variation state of the plurality of recognition results, and a second determination criterion for determining a variation state larger than the first determination criterion. The area below the determination criterion is determined as the area where maintenance is not required, the area from the first determination standard to the second determination standard is set as the area for notifying maintenance, and the area above the second determination standard is required for maintenance. The maintenance guidance system according to claim 1, wherein the maintenance guidance system is an area that is determined to be present.
The maintenance necessity determination unit performs maintenance between productions when it is determined that the variation state of the plurality of recognition results is a variation state from the first determination criterion to the second determination criterion. A guidance for maintenance is guided to the operator by the guiding means, and when it is determined that the variation state of the plurality of recognition results is a variation state equal to or greater than the second determination criterion, the guidance unit is configured to perform maintenance immediately. The maintenance guidance system according to claim 3, wherein the maintenance guidance system guides the worker.
The maintenance necessity determination unit determines a maintenance target part based on a variation state of a plurality of recognition results determined by the variation state determination unit,
The maintenance guidance system according to any one of claims 1 to 4, wherein the guidance unit guides a maintenance target portion determined by the maintenance necessity determination unit to an operator.
A maintenance guide method for prompting an operator to perform maintenance when it is necessary to determine whether or not the feeder needs to be maintained in a component mounting machine that sucks a component supplied by a feeder to a suction nozzle and mounts it on a circuit board. Because
The component mounting machine includes an image recognition device that recognizes an image of a component sucked by the suction nozzle, and corrects a suction position shift of the component sucked by the suction nozzle based on a recognition result of the image recognition device. Configured to be mounted on a board,
The variation state of the plurality of recognition results of the image recognition apparatus is determined, and the necessity of maintenance of the feeder is determined based on the determined variation state of the plurality of recognition results. As a result, the feeder needs to be maintained. A maintenance guidance method characterized by guiding the operator to the operator when it is determined.
When determining the variation state of the plurality of recognition results, at least one of each suction nozzle, each type of component sucked by the suction nozzle, each feeder, each feeder width, each component feed pitch The maintenance guidance method according to claim 6, wherein a variation state of the plurality of recognition results is determined.
A first determination criterion for determining a variation state of the plurality of recognition results and a second determination criterion for determining a variation state larger than the first determination criterion are set, and an area below the first determination criterion is set for maintenance. The area determined as unnecessary is set as the area from the first determination standard to the second determination standard as the area for notifying the maintenance, and the area above the second determination standard is set as the area determined as requiring maintenance. The maintenance guidance method according to claim 6 or 7, characterized by the above-mentioned.
When it is determined that the variation state of the plurality of recognition results is a variation state from the first determination criterion to the second determination criterion, a maintenance notice is guided to the worker so that maintenance is performed between productions. The operator is guided to perform maintenance immediately when it is determined that the variation state of the plurality of recognition results is a variation state equal to or greater than the second determination criterion. Maintenance guide method.
10. A maintenance guidance method according to claim 6, wherein a maintenance target part is determined based on a variation state of the plurality of recognition results, and the maintenance target part is guided to an operator. .