JP2007013033A - Implementation line management method - Google Patents

Abstract

A method for managing a mounting line capable of suppressing a decrease in production efficiency even when an unpredictable disturbance occurs.
During a production operation, a work time required for execution of a mounting operation to which each mounting machine is assigned is detected, and it is determined whether or not the working time of each mounting machine satisfies a predetermined allowable condition. To do. If there is a mounting machine whose work time is so long that it does not satisfy the permissible conditions due to the occurrence of disturbance such as component breakage, part or all of the mounting work assigned to that mounting machine is transferred to another mounting machine. Move to. Thereby, it can suppress that the mounting machine in which the disturbance generate | occur | produced becomes a bottleneck, and the production efficiency of the whole mounting line falls.
[Selection] Figure 6

Description

  The present invention relates to a method for managing a mounting line for mounting components on a printed circuit board.

  2. Description of the Related Art As a mounting machine for mounting electronic components on a printed circuit board, there is known a mounting machine that transports and mounts electronic components such as ICs on a printed circuit board with a suction head from a plurality of mounted component supply devices. In addition, a method is known in which a plurality of mounting machines are connected to form a mounting line and a mounting operation for mounting electronic components on a board is shared by the mounting machines.

Various optimization methods have been proposed to improve the production efficiency for setting the mounting work of components to be assigned to each mounting machine that constitutes such a mounting line and the arrangement of the component supply devices for performing each mounting work. (See Patent Documents 1 and 2 below).
Japanese Patent Laid-Open No. 10-209681 Japanese Patent Laid-Open No. 08-137828

  However, in an actual mounting line, disturbances that cannot be predicted in advance, such as component breakage and errors, may occur, and the expected production efficiency may not be obtained, leaving room for improvement.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a mounting line management method and the like that can suppress a decrease in production efficiency even when a disturbance occurs.

  The present invention provides the following means.

[1] A method for managing mounting work in a mounting line including a plurality of mounting machines,
During production operation, it detects the work time required to execute the mounting work to which each mounting machine is assigned,
Determine whether the working time of each mounting machine satisfies the predetermined allowable conditions,
A mounting line management method, wherein if there is a mounting machine having a work time that does not satisfy the allowable condition, a part or all of the mounting work assigned to the mounting machine is moved to another mounting machine.

  [2] The mounting line management method according to [1], wherein the allowable condition is set based on a difference in work time of each mounting machine.

  [3] The mounting line management method according to [1] or [2], wherein the permissible condition is set based on a duration of a state in which the work time is prolonged.

  [4] The system according to any one of items 1 to 3, wherein a part or all of the mounting work allocated to the mounting machine having a work time that does not satisfy the allowable condition is distributed and moved to a plurality of other mounting machines. Implementation line management method.

[5] A mounting line including a plurality of mounting machines,
Detecting means for detecting work time required for execution of mounting work to which each mounting machine is assigned during production operation;
A judging means for judging whether or not the working time of each mounting machine satisfies a predetermined allowable condition;
If there is a mounting machine having a work time that does not satisfy the permissible conditions, an assignment moving means for moving a part or all of the mounting work assigned to the mounting machine to another mounting machine;
A mounting line characterized by comprising

[6] A mounting machine constituting a mounting line,
A detecting means for detecting a work time required for performing the mounting work to which the mounting machine is assigned during the production operation;
When the working time of the mounting machine does not satisfy the predetermined permissible condition, an assignment moving means for moving a part or all of the mounting work assigned to the mounting machine to another mounting machine;
A mounting machine characterized by comprising:

  According to the above invention [1], even when a disturbance that cannot be predicted in advance occurs, if the working time of the mounting machine in which the disturbance occurs becomes long and the predetermined allowable condition is not satisfied, the mounting is performed. A part or all of the mounting work assigned to the machine is moved to another machine. Thereby, it can suppress that the mounting machine in which the disturbance generate | occur | produced becomes a bottleneck, and the production efficiency of the whole mounting line falls.

  According to the above invention [2], the allowable condition is set based on the difference in work time of each mounting machine, so that the production efficiency of the entire mounting line can be reduced in response to the balance of the working time between the mounting machines. The decrease can be suppressed.

  According to the above invention [3], the allowable condition is set based on the duration of the state in which the working time is prolonged, so that it is possible to suppress a sensitive reaction to the disturbance that is eliminated in a short time.

  According to the above invention [4], since the mounting work of the mounting machine whose work time is prolonged is distributed and moved to a plurality of other mounting machines, the work time of each mounting machine is further equalized, and more The decline in production efficiency of the entire mounting line can be suppressed accurately.

  According to the above invention [5], even when a disturbance that cannot be predicted in advance occurs, if the working time of the mounting machine in which the disturbance occurs becomes long and the predetermined allowable condition is not satisfied, the mounting is performed. A part or all of the mounting work assigned to the machine is moved to another machine. Thereby, it can suppress that the mounting machine in which the disturbance generate | occur | produced becomes a bottleneck, and the production efficiency of the whole mounting line falls.

  According to the above invention [6], even when a disturbance that cannot be predicted in advance occurs, if the working time of the mounting machine in which the disturbance has occurred becomes long and the predetermined allowable condition is not satisfied, the mounting is performed. A part or all of the mounting work assigned to the machine is moved to another machine. Thereby, it can suppress that the mounting machine in which the disturbance generate | occur | produced becomes a bottleneck, and the production efficiency of the whole mounting line falls.

  FIG. 1 is a schematic side view of a mounting line to which a mounting work management method according to an embodiment of the present invention is applied. As shown in the figure, the mounting line 90 includes, from the upstream side to the downstream side of the production line, a substrate carry-in machine 91, a printing machine 92, a plurality of (three) mounting machines 10 ..., an inspection machine 93, and a reflow furnace 94. And equipments such as a substrate unloader 95 are arranged side by side.

  The substrate carry-in machine 91 accommodates a large number of substrates and sequentially carries the substrates into the printing machine 92. The printing machine 92 applies cream solder to the processing area of the substrate that has been carried in by printing. The mounting machines 10 are for mounting electronic components at predetermined positions on a substrate. The inspection machine 93 inspects the mounting state of the electronic component mounted on the board. The reflow furnace 94 reflows the cream solder and solders the substrate and the component. Further, the substrate unloader 95 sequentially accommodates the substrates unloaded from the reflow furnace 94.

  Each equipment such as the mounting machine 10 constituting the mounting line includes a control device 99 configured by a personal computer or the like, and the driving of each facility is controlled by each control device 99. . Further, each control device 99 is connected via a communication means, and is configured so that the operation described in detail later as the entire mounting line is performed by transmitting and receiving signals between the control devices 99. Yes.

  Each of these facilities is provided with a display device 98... Such as a monitor for displaying the operation status.

  FIG. 2 is a plan view showing an example of a mounting machine. As shown in the figure, the mounting machine 10 is disposed on a base 11 and conveys a printed circuit board P, a component supply unit 30 disposed on both sides of the conveyor, and above the base 11. The electronic component mounting head unit 40 is provided.

  The component supply unit 30 is provided on the upstream side and the downstream side of the conveyor 20 on the front side and the rear side, respectively. In this embodiment, a component supply unit 31 to which a plurality of component supply devices such as tape feeders can be mounted side by side is provided on the front side and the rear side upstream portion, and a tray support member such as a pallet is stacked on the rear side downstream portion. And a component supply unit 32 including a tray supply device that can draw out the tray support member toward the center of the base 1. The components supplied from these component supply units 30 can be picked up by the head unit 40.

  The head unit 40 is movable in a region extending between the component supply unit 30 and the mounting position on the printed circuit board P so that components can be picked up from the component supply unit 30 and mounted on the printed circuit board P. Specifically, the head unit 40 is supported by a head unit support member 42 extending in the X axis direction (substrate transport direction of the conveyor 20) so as to be movable in the X axis direction. The guide rails 43 and 43 extending in the Y-axis direction (a direction orthogonal to the X-axis in the horizontal plane) are supported so as to be movable in the Y-axis direction. The head unit 40 is driven in the X axis direction by the X axis motor 44 via the ball screw 45, and the head unit support member 42 is driven in the Y axis direction by the Y axis motor 46 via the ball screw 47. To be done.

  In addition, a plurality of heads 41 are mounted on the head unit 40 side by side in the X-axis direction. Each head 41 is driven in the vertical direction (Z-axis direction) by an elevating mechanism using a Z-axis motor as a drive source, and is driven in the rotation direction (R-axis direction) by a rotation drive mechanism using an R-axis motor as a drive source. It has come to be.

  At the tip of each head 41, a suction nozzle for picking up electronic components and mounting them on the substrate is provided. Each nozzle is supplied with a negative pressure from a negative pressure means (not shown) at the time of component suction, and can suck the electronic component with a suction force by the negative pressure.

  In FIG. 2, reference numeral 12 denotes a camera that captures an image of the state of the component sucked by the head unit 40 so that a positional deviation of the component with respect to the nozzle can be detected.

  In the mounting line 90 provided with a plurality of such mounting machines 10..., After the cream solder is printed by the printing machine 92 on the board carried in from the board carry-in machine 91, the electronic components are placed by the plurality of mounting machines 10. Although mounting is performed, the mounting operation for mounting each component on each board to be produced is shared by a plurality of mounting machines 10... So that the board can be efficiently produced.

  From the viewpoint of improving the production efficiency of the entire mounting line 90, it can be determined by a known optimization method to which mounting machine 10 each mounting operation is assigned.

  In this embodiment, when allocation of mounting work to each mounting machine 10 optimized in this way is required, the assigned mounting work is performed on the storage devices provided in the control devices 99 of each mounting machine 10. The production program is stored as the initial production program. In this production program, for each mounting operation, in addition to data on the type of component to be mounted, mounting coordinate position on the board, etc., a component supply device for supplying a component for performing each mounting operation is located anywhere on each mounting machine 10. It also has information on the arrangement of the component supply device that is attached.

  Thus, according to the state where the allocation of the mounting work is optimized, high production efficiency can be obtained in the normal time.

  However, in an actual mounting line, disturbances that cannot be predicted in advance, such as component breakage and errors, can occur. In a mounting machine that has a disturbance, the time required to execute a pre-assigned mounting operation. May take a long time. For example, when switching to spare parts is performed due to parts being cut out, equipment failure occurs, parts picking mistakes occur frequently, operation speed is reduced to lower than usual to reduce parts picking mistakes This is the case, for example.

  If a mounting machine with a long working time occurs due to the influence of such disturbances, this mounting machine becomes a bottleneck, and the working time for configuring the mounting line according to this long working time is reduced. Play time is required for other short machines. In other words, the line tact time from when a board is loaded to when it is unloaded at each machine constituting the mounting line becomes longer, and the time interval at which a board that has completed mounting work from the mounting line is lined out becomes longer. The overall production efficiency will be reduced.

  Therefore, in the mounting line 90 according to this embodiment, the work time of each mounting machine is monitored during the production operation, and if there is a mounting machine in which the working time is prolonged, the mounting work assigned to the mounting machine. Is moved to another mounting machine to reduce the burden, and the production efficiency of the entire mounting line is prevented from decreasing. The movement of the mounting work means that the other mounting machine performs the work (mounting work) of mounting a component that was scheduled to be performed by a certain mounting machine on the board.

  In this embodiment, the permissible working time conditions that serve as a reference for examining the movement of the mounting work are set based on the difference in the working time of each mounting machine. Thereby, the fall of the production efficiency of the whole production line can be suppressed corresponding to the collapse of the balance of the working time of each mounting machine.

  In addition, the allowable work time condition is set based on the duration of the state in which the work time is prolonged. Thereby, it can suppress that it reacts sensitively with respect to the slight disturbance which eliminates in a short time.

  In this embodiment, the control device 99 of each mounting machine 10 monitors its own work time, determines whether or not the predetermined allowable condition is satisfied, and if not, performs its own mounting work. By requesting other mounting machines to take over, the movement of mounting work is realized. That is, the control device of each mounting machine 10 includes detection means for detecting work time required for execution of the mounting work, determination means for judging whether the work time satisfies a predetermined allowable condition, and mounting work. It functions as an allocation moving means for moving to another mounting machine.

  As described above, in this embodiment, since the control device 99 of each mounting machine 10 makes various determinations, the mounting line 90 transmits and receives each working time as load information between the mounting machines, and is necessary. In response to this, information is sent and received to move the mounting work.

  FIG. 3 is an explanatory diagram conceptually showing transmission / reception of information between the mounting machines. As shown in FIG. 5A, each mounting machine intermittently uses all the other mountings as load information (own equipment load information), which is the work time required to execute the mounting work assigned to itself. Transmitting (broadcasting) to the machine. Each mounting machine receives load information (other equipment load information) transmitted from other mounting machines. The communication means provided in the control device 99 of each mounting machine functions as a transmitting means for transmitting the working time (load information) of each mounting machine to the outside.

  Thus, each mounting machine that obtains the working time (load information) in the other mounting machine compares the working time (load information) of the mounting machine with the working time (load information) of the other mounting machine, and It is determined whether the mounting operation of should be moved to another mounting machine.

  If it should be moved as a result of this determination, the mounting work that can be moved to any other mounting machine is appropriately extracted from the mounting work assigned to the mounting machine. Then, as shown in FIG. 6B, a mounting work movement request including mounting data for performing the mounting work to be moved is transmitted to another specific mounting machine that is to be a destination of the mounting work. The other specific mounting machine that has received the request, if it can accept the request, sends a message to that effect to the mounting machine that is the movement source of the mounting operation, and the moving mounting machine receives the request, It can be confirmed that the mounting work assigned to the mounting machine has been moved.

  FIG. 4 is an explanatory diagram of an example in which the mounting operation is moved when a disturbance occurs. In the figure, four mounting machines A to D are connected to form a mounting line, and the board (work) to be produced flows in the order of mounting machines A, B, C, and D, which are sequentially required. Implementation work has been done. In the figure, the vertical direction indicates the passage of time, and the numbers in each row indicate the working time (seconds) of each mounting machine at each time point.

  As a premise, the mounting work is assigned so that the working time of each of the mounting machines A to D is 60 seconds by any optimization process.

  Substrate A, B, C, and D are sequentially loaded into the most upstream mounting machine A from the start of production every 60 seconds and sent to the downstream mounting machines B, C, and D. In the steady state where the mounting work on each board is performed by each mounting machine A to D, the work time required for the mounting work assigned to each mounting machine A to D is 60 seconds. The tact time is 60 seconds, and a substrate on which mounting work has been completed is completed every 60 seconds.

  Here, it is assumed that a disturbance occurs in the mounting machine B. For example, this is a case in which a part running out occurs and a switching operation state using spare parts is entered. In the mounting machine B, it is assumed that due to this disturbance, the work time, which was originally 60 seconds, is increased to 90 seconds. At this time, the mounting machine B on the upstream side cannot send the next board until the mounting work of the mounting machine B is completed, and the next board is not sent to the mounting machine C on the downstream side. As a bottleneck, the line tact time is extended to 90 seconds, and the substrate is completed every 90 seconds.

  If the state in which the disturbance occurs in the mounting machine B, the line tact time is 90 seconds even though the mounting work other than the mounting machine B is completed in 60 seconds without changing from the steady state. is there.

  If such a state continues (here, it continues for a period of three or more boards to be produced), a part of the mounting work assigned to the mounting machine B is distributed to the other mounting machines A, C, and D. Move temporarily. In this embodiment, moving the mounting operation of a mounting machine in this way to one or a plurality of other mounting machines and performing production is called distributed processing. In this distributed processing, the mounting work and the movement destination to be moved are selected so that the work time of each mounting machine is equalized.

  In this example, both the mounting machine B in which a part of the mounting work is moved to another mounting machine and the other mounting machines A, C, and D that have assumed the mounting work are equalized with a work time of 70 seconds. The line tact time of the production line is also reduced to 70 seconds, and the decline in production efficiency is suppressed.

  While the disturbance occurs in the mounting machine B, this distributed processing state continues, but when the disturbance of the mounting machine B is resolved, the working time in the mounting machine B is shorter than 60 seconds in the steady state, here 50 seconds. It has become. This is because part of the mounting work originally assigned is performed on behalf of the other mounting machines A, C, and D.

  If the disturbance is resolved in this way, the distributed work is terminated and the mounting work originally assigned to the mounting machine B that has been temporarily moved to the mounting machines A, C, and D is returned to the mounting machine B, and each mounting is performed. If the machine is healthy, it returns to a steady state where optimum production efficiency is obtained.

  The working time of the mounting work moved from the mounting machine B to the other mounting machines A, C, and D by the above distributed processing is 10 seconds in the steady state (the steady state working time 60 seconds-after the distributed processing ( The work time is 50 seconds) after the disturbance is resolved, and in the state where the disturbance occurs, the mounting machine B has 20 seconds (work time 90 seconds before distributed processing-work time 70 seconds after distributed processing). On the other hand, for these mounting operations, the mounting machines A, C, and D in the distributed processing total 30 seconds (10 seconds work increase from 60 seconds to 70 seconds per vehicle x 3). It takes work time. The reason why the work times do not coincide with each other is that the mounting work originally assigned to the mounting machine B is suitable for the mounting machine B, and the mounting machine B can perform the processing more efficiently (in a short time). There are cases.

  Next, an operation procedure when such distributed processing is performed will be described based on a flowchart.

  FIG. 5 is a flowchart showing the procedure of distributed processing in this mounting line. In the figure, among the multiple mounting machines, the processing at the mounting work movement source that requests other mounting machines for the mounting work assigned to itself due to the long work time and the mounting work movement destination that receives the request Are expressed in parallel.

  As shown in the figure, during production operations, distributed processing programs are executed in parallel, and each mounting machine intermittently communicates load information (working time) on the mounting machine (own equipment) to each other. (Step S10).

  In this state, each mounting machine determines whether or not the work time required for executing the mounting work to which the mounting machine (own equipment) is assigned satisfies a predetermined allowable condition (step S12).

  As a specific example for determining that this allowable condition is not satisfied, for example, the working time of the mounting machine requires (1) 20% or more of the average working time of all mounting machines, (2) all mounting machines For example, a state that requires an average working time of 10% or more continues for five or more recent substrates. Further, a combination determination of a plurality of small conditions can be made, such as determining that the permissible condition is not satisfied when one of the two exemplified conditions is satisfied, or when both are satisfied. Further, even when a determination is made based on the difference in work time of each mounting machine, in addition to comparing with the average work time as described above, it should be compared with the shortest work time among other mounting machines. Etc. Alternatively, it may be determined by comparison with a predetermined scheduled work time (for example, 60 seconds) set in advance.

  Furthermore, it may be determined based on whether or not the cause (disturbance) that the work time has been extended is a preset event. For example, an event that starts the examination of distributed processing in advance when a switching operation using spare parts is performed in response to a situation where a part is out of service, a part supply apparatus is broken, or a part supply apparatus is removed by an operator. It may be set as.

  These permissible conditions are examples, and other conditions may be set.

  If the permissible conditions are satisfied (YES in step S12), it is not necessary to move the mounting work from the mounting machine. Therefore, mutual transmission of load information is performed so that a request for moving the mounting work from another mounting machine can be received. Return to (step S10).

  If the permissible conditions are not satisfied (NO in step S22), the mounting work to be moved is extracted (step S14). The mounting work to be moved is premised on that there are other mounting machines in which components used in the mounting work are mounted on the component supply unit 30 and are movable. And as a result of moving this mounting work to another mounting machine, it is preferable that the working time of the mounting machine and the other mounting machine is made more equal. Only one or a plurality of mounting operations may be moved. Further, when a plurality of mounting operations for the same component are assigned, only a part of them may be moved. Further, there may be only one mounting machine or a plurality of other mounting machines that are destinations for mounting work. When the work times of a plurality of other mounting machines are approximately the same, it is preferable to distribute the plurality of mounting works to a plurality of other mounting machines. If it does in this way, it will become easy to equalize the working time of the mounting machine concerned and a plurality of other mounting machines more. Further, only a part or all of the mounting work assigned to the mounting machine may be moved. For example, even if the mounting machine is in a state where mounting work cannot be performed due to a failure, etc., by moving all mounting work assigned to the mounting machine to another mounting machine if possible, Board production can be continued for the entire mounting line.

  If there is no movable mounting work (NO in step S16), the mounting work cannot be moved from the mounting machine. Therefore, the load information is exchanged so that a mounting work movement request from another mounting machine can be received. Return to transmission (step S10).

  If there is a movable mounting operation (YES in step S16), the mounting data of the mounting operation to be moved is extracted (step S18), and is transmitted as a mounting operation movement request to a mounting machine that can be a movement destination (step S20). The movement request may include a plurality of mounting operations at the same time, and the mounting data of each mounting operation includes a component name and mounting coordinate data on the board. When there are a plurality of mounting machines that are desired to be moved, a movement request is transmitted to each mounting machine.

  In addition, when the movement source is located upstream from the movement destination, the mounting operation movement request includes a board to be produced in a state where the mounting machine for performing the mounting work is changed (hereinafter referred to as such board). Is referred to as distributed processing application work). As this information, for example, a serial management number of a substrate or a serial number in a lot can be cited. The reason for including such information for specifying a board is that the distributed processing application work produced with the mounting operation moved is specified by the upstream apparatus.

  When receiving the mounting work movement request (step S22), the mounting machine side as the movement destination determines whether or not the movement request can be accepted (step S24).

  This determination is made, for example, whether there is a sufficient number of parts used for the mounting operation related to the movement request, whether this part is in the operation of switching to a spare part in the movement destination mounting machine, and whether the movement destination mounting apparatus is the movement source. If it is on the upstream side of the mounting machine, it will be evaluated whether the board that is the target of the mounting operation according to this movement request has reached the planned production number and has already begun production of the next type of board. .

  If the movement request cannot be accepted (NO in step S24), the movement request is returned to the movement source (step S26). When the movement source receives the rejection result (step S28), another implementation is performed. Returning to the extraction of the mounting work to be moved so as to examine the movement of the work (step S14).

  If the movement request can be accepted at the movement destination (YES in step S24), the movement source is returned to the movement source (step S30). When the movement destination is upstream from the movement source, information specifying the distributed processing application work is included in the reply indicating that the movement request is accepted. The reason why such information is included is that the distributed processing application work produced in a state where the mounting work is moved is specified by the upstream apparatus.

  In this way, in the destination mounting machine that has accepted the movement request, it is determined whether or not the board to be produced is a distributed processing application work (step S32), and if it is not a distributed processing application work (NO in step S32). ) Continue production in the state before moving the mounting work, and wait for the arrival of distributed processing application work. If the work is a distributed processing application work (YES in step S32), the received mounting work is added to the mounting work performed on the destination mounting machine to be in a distributed processing state (step S34).

  On the other hand, when the movement requester receives the result of the movement request (step S36), it is determined whether or not the production target board is a distributed processing application work (step S38). Otherwise (NO in step S38), the production in the state before moving the mounting work is continued and the arrival of the distributed processing application work is waited. If the work is a distributed processing application work (YES in step S38), a skip processing of the moved mounting work is performed so that the moved mounting work is not performed by the moving mounting machine (step S38). S40). This type of skipping process is supported because the assignment of mounting work is determined by optimization calculation, and it is desirable to return to the original mounting work assignment and resume production if disturbances are resolved. This is because the mounting operation to be moved is not deleted from the production program of the mounting machine.

  The distributed processing state in step S34 and step S40 is started first on the upstream mounting machine of either the mounting machine that is the destination of the mounting work or the mounting machine that is the source of the mounting work. The substrate on which the work has been performed arrives at the other downstream mounting machine and is started in this mounting machine. This distributed processing state continues until the overload state is resolved (NO in step S42). Whether or not the overload state has been resolved can be determined from the work time in the mounting machine.

  When the influence of disturbance or the like is eliminated on the mounting machine side from which the mounting work is moved and the overload state is resolved (step S42), the fact that the distributed processing is finished is transmitted to the mounting machine that is the moving destination of the mounting work. (Step S44). When the mounting operation is moved to a plurality of other mounting machines, it is transmitted to each mounting machine.

  Then, it is determined whether the substrate to be produced is a distributed processing application work (step S46). If it is a distributed processing application work (YES in step S46), the distributed processing state is continued, and the distributed processing is performed. If it is not an applicable work (NO in step S46), the skip processing of the moved mounting work is terminated, and the normal production state is restored (step S48).

  On the other hand, when the mounting machine to which the mounting operation is moved receives the end of the distributed processing (step S50), it is determined whether the production target board is a distributed processing application work (step S52). If it is a distributed processing application work (YES in step S52), the distributed processing state is continued, and if it is not a distributed processing application work (NO in step S52), the additional processing of the mounting work added by the movement is terminated. Return to the normal production state (step S54). The termination of the distributed processing state in step S48 and step S54 is first returned to the normal production state on either the mounting machine to which the mounting work is moved or the mounting machine on the upstream side of the mounting work source. At the same time, the substrate on which the normal mounting operation has been performed reaches the other downstream mounting machine and is returned to the normal production state in this mounting machine.

  In this way, when the overload condition is resolved and the long working time is restored, the distributed processing is terminated, so the normal production state in which the allocation of the mounting work is optimized is quickly returned to a high level. Productivity can be ensured.

  FIG. 6 is an explanatory diagram of an example of the mounting work movement performed when a part cut occurs during the production operation. As shown in FIGS. 4A to 4C, a component supply device that supplies components A, B, and C is attached to the upstream mounting machine A, and a mounting operation for mounting these components is assigned. . Further, a component supply device that supplies components A, D, and E is attached to the downstream mounting machine B, and a mounting operation for mounting these components is assigned.

  Focusing on the component A, a plurality of components A are to be mounted on each substrate (for example, 60), and a plurality of mounting operations for mounting the plurality of components A on the substrate are performed by the mounting machines A and B. Are assigned half by one (for example, 30 each). Therefore, in the board (1) produced during normal production, the component A mounted by the mounting machine A and the component B mounted by the mounting machine B are halved (30 by each).

  Here, it is assumed that some disturbance occurs in the mounting machine B on the downstream side and the work time is prolonged. In this case, the mounting machine B whose work time has been extended has a part of the mounting work for the component A (with respect to the mounting machine A having the same part A so as to equalize the work time with the mounting machine A ( For example, a movement request for 12) is made. In the mounting machine A that has accepted this, it is assumed that all mounting operations on the board (2) have already been completed.

  Subsequently, as shown in FIG. 5B, when the next board (3) is carried into the mounting machine A, the mounting machine A performs distributed processing to which the mounting work requested from the mounting machine B is added. However, since the board (2) carried into the mounting machine B at this point is the board before the distributed processing is applied, the mounting machine B does not perform the mounting process skipping process and mounts the same as in normal production. Work (30 parts A) is performed.

  Subsequently, as shown in FIG. 5C, when the board (3) to which the distributed processing is applied is loaded into the mounting machine B, the mounting work already added as the distributed processing by the mounting machine A (30 components A) + 12 = 42) is being performed, the mounting machine B skips the moved mounting work and performs only the remaining mounting work (30-12 for component A = 18).

  As described above, according to this embodiment, even when a disturbance that cannot be predicted in advance occurs, if the working time of the mounting machine in which the disturbance occurs becomes long and the predetermined allowable condition is not satisfied. , Each mounting machine on the mounting line automatically responds to move part or all of the mounting work assigned to the mounting machine to another mounting machine, and the mounting machine where the disturbance occurred becomes a bottleneck. Therefore, it is possible to suppress a decrease in the production efficiency of the entire mounting line.

  In addition, since the allowable work time conditions are set based on the difference in the work time of each mounting machine, it is possible to directly determine whether or not the balance of the work time between the mounting machines has occurred. It is possible to suppress a decrease in production efficiency of the entire mounting line.

  Moreover, since the allowable condition for the work time is set based on the duration of the state in which the work time is prolonged, it is possible to suppress a sensitive reaction to a disturbance that is eliminated in a short time.

  In addition, since the mounting work of mounting machines whose work time is prolonged is distributed and moved to multiple other mounting machines, the work time of each mounting machine is more evenly distributed and the entire mounting line is more accurately A decrease in production efficiency can be suppressed.

  The present invention has been described based on one embodiment. However, the present invention is not limited to the above-described configuration, and may be appropriately changed as follows.

  For example, in the above embodiment, a tape feeder and a pallet are used as an example of the component supply device, but the component supply device is not limited thereto, and a bulk feeder, a feeder configured to supply a wafer on which a bare chip is mounted, etc. Other types of component supply devices may be used.

  In addition, as a mounting machine, a head for mounting a component on a substrate can move in a linear uniaxial direction, can move freely in two directions on a plane, or can move on a circumference. May be. In addition, although the mounting machine is an example that mounts a component supply device, the component of the supply device is mounted on the board even if it is connected to an external component supply device or just placed in the vicinity. Anything that can be mounted is acceptable. The mounting line according to the present invention can be formed by combining one or more of these various mounting machines.

  In the above embodiment, detection of the working time of each mounting machine, determination of whether or not a predetermined allowable condition is satisfied, and movement of the mounting work are performed in the control device of each mounting machine. It may be performed by a higher-level computer or the like that performs overall management, or may be performed by any specific mounting machine.

It is a schematic side view of the mounting line to which the management method of the mounting line concerning one Embodiment of this invention is applied. It is a top view which shows an example of a mounting machine. It is explanatory drawing which showed notionally the transmission / reception of the information between each mounting machine. It is explanatory drawing of an example to which mounting operation | movement is moved when disturbance arises. It is a flowchart which shows the procedure of the distributed process in this mounting line. It is explanatory drawing of the example of the mounting operation | movement movement performed when components run out during production operation.

Explanation of symbols

10 Mounting Machine 90 Mounting Line P PCB (Printed Circuit Board)

Claims (6)

A method for managing a mounting line having a plurality of mounting machines,
During production operation, it detects the work time required to execute the mounting work to which each mounting machine is assigned,
Determine whether the working time of each mounting machine satisfies the predetermined allowable conditions,
A mounting line management method, wherein if there is a mounting machine having a work time that does not satisfy the allowable condition, a part or all of the mounting work assigned to the mounting machine is moved to another mounting machine.   The mounting line management method according to claim 1, wherein the permissible condition is set based on a difference in work time of each mounting machine.   The mounting line management method according to claim 1, wherein the permissible condition is set based on a duration of a state in which a work time is prolonged.   The mounting line according to any one of claims 1 to 3, wherein a part or all of mounting work allocated to a mounting machine having a work time that does not satisfy the allowable condition is distributed and moved to a plurality of other mounting machines. Management method. A mounting line with a plurality of mounting machines,
Detecting means for detecting work time required for execution of mounting work to which each mounting machine is assigned during production operation;
A judging means for judging whether or not the working time of each mounting machine satisfies a predetermined allowable condition;
If there is a mounting machine having a work time that does not satisfy the permissible conditions, an assignment moving means for moving a part or all of the mounting work assigned to the mounting machine to another mounting machine;
A mounting line characterized by comprising A mounting machine constituting a mounting line,
A detecting means for detecting a work time required for performing the mounting work to which the mounting machine is assigned during the production operation;
When the working time of the mounting machine does not satisfy the predetermined permissible condition, an assignment moving means for moving a part or all of the mounting work assigned to the mounting machine to another mounting machine;
A mounting machine characterized by comprising:

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