JP7012438B2 - Production program optimization method and component mounting machine - Google Patents

Description

This specification discloses a method for optimizing a production program that handles parts sucked by a specially shaped suction nozzle (hereinafter referred to as "special nozzle") that cannot be specified by the nozzle diameter, and a technology related to a parts mounting machine. ..

Generally, the suction nozzle used in the component mounting machine has a circular suction surface (lower end surface), so a nozzle diameter is specified for each type of component, and the component is suctioned by the suction nozzle with the specified nozzle diameter. I try to mount it on the board.

However, as described in Patent Document 1 (Japanese Unexamined Patent Publication No. 2009-130058), some of the parts mounted on the circuit board have a special shape that cannot be sucked by the suction nozzle having a circular suction surface. Such a specially shaped component needs to be sucked by a special nozzle having a special shape with a non-circular suction surface.

Japanese Unexamined Patent Publication No. 2009-130058

By the way, there are a plurality of types of suction nozzles having a circular suction surface, even if the nozzle diameter is the same, but the dimensions and shapes of parts other than the nozzle diameter are different. However, if the nozzle diameters are the same, different types of suction are made. Even if it is a nozzle, it can be similarly used as a suction nozzle that sucks the same component.

On the other hand, since the suction surface of the special nozzle is non-circular, it cannot be specified by the nozzle diameter. Therefore, for the special nozzle, only one type is specified by the nozzle type (ID, etc.) instead of the nozzle diameter. Therefore, when optimizing the production program (production job) executed by the component mounting machine, if there are multiple types of special nozzles that can be used, the operator can use the special nozzle for each component mounting machine or mounting head. The work of optimizing the production program by respecifying the type of the product had to be repeated, and the work of optimizing the production program was troublesome and troublesome. In addition, due to this, the production program may not be sufficiently optimized and the production cycle time may become long.

In order to solve the above problems, in a method of optimizing a production program that controls the operation of a component mounting machine using component data, the component data is a component used for image processing of the component supplied to the component mounting machine. It is component data including shape data showing a shape feature and nozzle data for specifying the type of suction nozzle for sucking the component, and the nozzle data is for a component sucking with a suction nozzle having a circular suction surface. Specifies the suction nozzle to be used for each part by the nozzle diameter, and for parts that suck with a specially shaped suction nozzle (hereinafter referred to as "special nozzle") that cannot be specified by the nozzle diameter, the part is sucked for each part. The first feature is to specify a plurality of possible types of special nozzles, and further, for the parts to be adsorbed by the special nozzles, a plurality of types of special nozzles capable of adsorbing the parts are designated in order of priority for each part. The second feature is to do.

In short, the component data includes nozzle data that specifies the type of suction nozzle that adsorbs the component, in addition to the shape data used for image processing of the component. Furthermore, in the nozzle data, for parts that are sucked by a suction nozzle with a circular suction surface, the suction nozzle used for each part is specified by the nozzle diameter, so if the specified nozzle diameter is the same, different types of suction Even if it is a nozzle, it can be similarly used as a suction nozzle that sucks the same parts. On the other hand, for the parts to be adsorbed by the special nozzle, since a plurality of types of special nozzles capable of adsorbing the parts are designated for each part, a plurality of types of special nozzles can be used. Therefore, when optimizing the production program (production job) executed by the component mounting machine using the component data, the operator also uses the component mounting machine for each component mounting machine, as with the suction nozzle specified by the nozzle diameter, for the special nozzle. Alternatively, it is not necessary to repeat the work of optimizing the production program by respecifying the type of special nozzle for each mounting head. As a result, even when a special nozzle is used, the production program can be easily optimized, the production cycle time can be surely shortened, and the productivity can be improved.

Here, when a plurality of types of special nozzles are specified for each component sucked by the special nozzles, the plurality of types of special nozzles may be specified in order of priority. At this time, the priority of the special nozzle may be determined in consideration of, for example, the usage record of the special nozzle, the size of the suction surface, etc., and the higher the suction stability of the part, the higher the priority. May be. In this way, it becomes easier to determine which special nozzle should be used from among the specified multiple types of special nozzles, and the special nozzle with the higher priority when optimizing the production program. It is possible to judge whether or not it is the optimum selection from.

Further, the plurality of types of special nozzles may be specified by the parts manufacturer, the creator of the parts data, or the like, but may be arbitrarily specified by the user who uses the parts data. .. In this way, the user can select and specify a plurality of types of special nozzles capable of sucking parts from the types of special nozzles that can be used in the component mounting machine owned by the user.

When optimizing the production program that controls the operation of the component mounting machine using the component data, the suction nozzles that can be used in the component mounting machine and the nozzle diameter specified in the nozzle data are selected. In addition to selecting the suction nozzle that sucks the parts, select the special nozzle that sucks the parts from the special nozzles that can be used in the parts mounting machine and the multiple types of special nozzles specified in the nozzle data, and the mounting sequence. (Part mounting order) may be determined. At this time, when a plurality of types of special nozzles specified in the nozzle data are prioritized, the special nozzle having the higher priority may be preferentially selected.

Further, in the case of optimizing the production program that controls the operation of each component mounting machine on the component mounting line, a plurality of types of components required for the production of the component mounting board produced on the component mounting line are provided in each component mounting machine. Select the suction nozzle that can be used in each component mounting machine and the suction nozzle that sucks the component assigned to the component mounting machine from the suction nozzles with the nozzle diameter specified in the nozzle data. For the component mounting machine to which the component to be sucked by the special nozzle is assigned, the component is sucked from the special nozzles that can be used in the component mounting machine and the plurality of types of special nozzles specified in the nozzle data. A process of selecting a special nozzle to be mounted and determining a mounting sequence of each component mounting machine and a process of calculating a production cycle time of the component mounting line are included, and these three processes are assigned to each component mounting machine. The optimization process of changing and executing the combination of parts to calculate the production cycle time of the parts mounting line is repeated, and parts are assigned to each part mounting machine so that the production cycle time of the parts mounting line is shortened. It is advisable to optimize the production program of each component mounting machine. In this way, even when a special nozzle is used in any of the component mounting machines on the component mounting line, the production program of each component mounting machine can be efficiently optimized.

FIG. 1 is a block diagram schematically showing the configuration of the production control system of the component mounting line of one embodiment. FIG. 2 is a flowchart showing the processing flow of the production program optimization processing program.

Hereinafter, an embodiment will be described.
First, the configuration of the component mounting line 10 will be described with reference to FIG.
The component mounting line 10 is configured by arranging a plurality of component mounting machines 12 along the transport direction (X direction) of the circuit board 11. In addition, although not shown, a solder printing machine for printing solder on the circuit board 11, an inspection machine for inspecting the component mounting state of the circuit board 11, a reflow device, and the like are arranged on the component mounting line 10.

Although not shown, the mounting head 15 of each component mounting machine 12 can interchangeably hold a suction nozzle having a circular suction surface and a special nozzle having a non-circular suction surface formed into a special shape. In each component mounting machine 12, a nozzle station (nozzle changer) for mounting a replacement suction nozzle and a special nozzle is installed. In the following description, the term "suction nozzle" simply means a "suction nozzle having a circular suction surface", and the term "nozzle" simply means a suction nozzle and / or a special nozzle. The mounting head 15 can hold one or a plurality of nozzles, and is configured to move the mounting head 15 above the nozzle station to automatically replace the nozzles when the nozzles are replaced. Further, the type of the nozzle held in the mounting head 15 is specified from among a plurality of types of suction nozzles and a plurality of types of special nozzles by a production program described later.

By executing the production program described later, the control device 20 of each component mounting machine 12 carries the circuit board 11 conveyed by the conveyor 13 from the component mounting machine 12 on the upstream side to a predetermined position and clamp mechanism (FIG. The circuit board 11 is clamped in (not shown), the component supplied from the feeder 14 is sucked by the nozzle of the mounting head 15, and the component is moved from the suction position to the imaging position, and the component is moved from the lower surface side thereof. After taking an image with a component imaging camera (not shown), processing the image, recognizing the component using the shape data of the component data described later, and determining the amount of suction position deviation of the component. The component mounting board is produced by correcting the suction position deviation amount and mounting the component on the circuit board 11.

The control device 20 of each component mounting machine 12 is communicably connected to the production management computer 21 that manages the production of the entire component mounting line 10 via the network 22, and each component mounting is performed by the production management computer 21. The operation of the machine 12 is managed. Further, the network 22 is connected to an optimization processing computer 23 (production program optimizing device) that executes a process of optimizing a production program (production job) to be executed by each component mounting machine 12.

The optimization processing computer 23 includes an input device 24 such as a keyboard, a mouse, and a touch panel, a display device 25 that displays the progress of the optimization processing of the production program, component data, and the like, and the production program of FIG. 2 to be described later. A storage device 26 or the like that stores an optimization processing program, component data, or the like is connected. Before the start of production, the optimization processing computer 23 executes a process of optimizing the production program of each component mounting machine 12 by executing the production program optimization processing program of FIG. 2, which will be described later, and optimizes the process. The production program is transmitted to each component mounting machine 12 via the network 22.

In this embodiment, the component data including the shape data showing the shape characteristics of the component used for image processing of the component supplied to the component mounting machine 12 includes the nozzle data for specifying the type of the nozzle for adsorbing the component. Let me. In this nozzle data, for parts that are sucked by a suction nozzle with a circular suction surface, the suction nozzle to be used for each part is specified by the nozzle diameter, and for parts that are sucked by a special nozzle that cannot be specified by the nozzle diameter, that part. Each time, a plurality of types of special nozzles capable of adsorbing the relevant component are specified.

In short, there are multiple types of suction nozzles with a circular suction surface that have the same nozzle diameter but different dimensions and shapes other than the nozzle diameter, but if the nozzle diameters are the same, different types of suction nozzles exist. Even if it is a nozzle, it can be similarly used as a suction nozzle that sucks the same component. Therefore, for a suction nozzle having a circular suction surface, by designating the nozzle diameter, it is possible to specify a plurality of types of suction nozzles having the same nozzle diameter.

On the other hand, since the suction surface of the special nozzle is non-circular, it cannot be specified by the nozzle diameter. Therefore, for the parts to be adsorbed by the special nozzle, a plurality of types of special nozzles capable of adsorbing the parts are designated for each part.

Here, when a plurality of types of special nozzles are specified for each component, the order of designation may be any order, and for example, a plurality of types of special nozzles may be specified in order of priority. At this time, the priority of the special nozzle may be determined in consideration of, for example, the usage record of the special nozzle, the size of the suction surface, etc., and the higher the suction stability of the part, the higher the priority. May be. In this way, it becomes easier to determine which special nozzle should be used from among the specified multiple types of special nozzles, and the special nozzle with the higher priority when optimizing the production program. Whether or not it is the optimum selection is determined from.

Further, the plurality of types of special nozzles specified by the nozzle data of the parts data may be specified by the parts manufacturer, the creator of the parts data, or the like, but in this embodiment, the user side who uses the parts data side. It is possible to specify it arbitrarily with. In this way, the user can select and specify a plurality of types of special nozzles capable of sucking parts from the types of special nozzles that can be used in the component mounting machine owned by the user.

The component data including the shape data and the nozzle data described above are used for image recognition of the component attracted to the nozzle of the mounting head 15, and also control the operation of each component mounting machine 12 of the component mounting line 10. It is also used when optimizing production programs.

When optimizing the production program that controls the operation of each component mounting machine 12 of the component mounting line 10, the following steps (1) to (4) are executed.
(1) A plurality of types of components necessary for producing a component mounting board to be produced on the component mounting line 10 are assigned to each component mounting machine 12 on the component mounting line 10.

(2) From the suction nozzles that can be used in each component mounting machine 12 and the suction nozzles having the nozzle diameter specified in the nozzle data, select the suction nozzle that sucks the parts assigned to the component mounting machine 12. Further, for the component mounting machine to which the component to be sucked by the special nozzle is assigned, the special nozzle that can be used in the component mounting machine 12 and the plurality of types of special nozzles specified in the nozzle data are selected. A special nozzle for sucking parts is selected, and the mounting sequence (part mounting order) and feeder arrangement (arrangement order of feeders 14) of each component mounting machine 12 are determined.

(3) Calculate the production cycle time of the component mounting line 10.
(4) The combination of parts to be assigned to each component mounting machine 12 is changed, and the steps (2) to (4) above are repeated.

As a result, the combination of parts assigned to each component mounting machine 12 is changed, the nozzle used in each component mounting machine 12 is selected, the mounting sequence is determined, and the production cycle time of the component mounting line 10 is calculated. The process is repeated, and parts are assigned to each component mounting machine 12 so that the production cycle time of the component mounting line 10 is shortened within the target value, and the production program of each component mounting machine 12 is optimized.

The optimization process of the production program of the present embodiment described above is executed by the optimization process computer 23 according to the production program optimization process program of FIG. When this program is started, first, in step 101, it is determined whether or not the user (worker) designates a special nozzle to be used in each component mounting machine 12. In this determination, for example, the optimization processing computer 23 switches the screen of the display device 25 to a screen inquiring whether or not the user specifies the special nozzle, and the user operates the input device 24 to optimize the necessity of the user specification. The determination may be made after waiting for input to the computer 23 for conversion processing.
If it is determined in step 101 that the user does not specify the special nozzle, the process proceeds to step 104.

On the other hand, if it is determined in step 101 that the user designates a special nozzle, the process proceeds to step 102, the screen of the display device 25 is switched to the special nozzle designation screen, and in the next step 103, the user designates the special nozzle. Waits until the process is completed, and when the user completes the designation of the special nozzle, the process proceeds to step 104.

In this step 104, a plurality of types of components necessary for producing the component mounting board produced on the component mounting line 10 are assigned to each component mounting machine 12 on the component mounting line 10. After that, the process proceeds to step 105, and the nozzle to be used in each component mounting machine 12 is selected. At this time, among the suction nozzles that can be used in each component mounting machine 12 and the suction nozzles having the nozzle diameter specified in the nozzle data of the component data, the suction nozzle that sucks the component assigned to the component mounting machine 12 is selected. For the component mounting machine to which the component to be sucked by the special nozzle is selected, the special nozzle that can be used in the component mounting machine 12 and the plurality of types of special nozzles specified in the nozzle data of the component data are used. Select a special nozzle that adsorbs the relevant part from the list.

After that, the process proceeds to step 106 to determine the mounting sequence and feeder arrangement of each component mounting machine 12. After that, the process proceeds to step 107 to calculate the production cycle time of the component mounting line 10, and then to step 108 to determine whether or not the calculated production cycle time has become shorter than the target value. As a result, if it is determined that the production cycle time has not yet been shortened to the target value, the process proceeds to step 109, the combination of parts assigned to each component mounting machine 12 is changed, and the processes of steps 105 to 108 described above are performed. repeat.

As a result, the combination of parts assigned to each component mounting machine 12 is changed, the nozzle used in each component mounting machine 12 is selected, the mounting sequence is determined, and the production cycle time of the component mounting line 10 is calculated. The process is repeated, and when the production cycle time of the component mounting line 10 is shortened within the target value, the optimization process is completed, the process proceeds to step 110, and the optimized production program is transmitted to each component mounting machine 12. And end this program.

According to the present embodiment described above, the component data including the shape data used for image processing of the component includes the nozzle data that specifies the type of the suction nozzle that adsorbs the component, and the nozzle data is further determined. For parts that suck with a suction nozzle with a circular suction surface, specify the suction nozzle to be used for each part by the nozzle diameter, and for parts that suck with a special nozzle that cannot be specified by the nozzle diameter, specify the relevant part for each part. Since multiple types of special nozzles that can be adsorbed are specified, when optimizing the production program executed by the component mounting machine 12 using component data, the special nozzle is also specified by the nozzle diameter. Similarly, it is not necessary for the operator to repeat the work of respecifying the type of the special nozzle for each component mounting machine 12 or each mounting head 15 and optimizing the production program. As a result, even when a special nozzle is used, the production program can be easily optimized, the production cycle time can be surely shortened, and the productivity can be improved.

The present invention is not limited to the above embodiment, and the configuration of the component mounting line 10 can be changed, the mounting head 15 can be replaced, and the nozzle can be replaced integrally with the mounting head 15. The production management computer 21 may also be used as the optimization processing computer 23, and the production management computer 21 may execute the production program optimization processing program of FIG. 2 to optimize the production program. Needless to say, it can be changed and implemented within the range that does not deviate from the gist.

10 ... component mounting line, 11 ... circuit board, 12 ... component mounting machine, 14 ... feeder, 15 ... mounting head, 20 ... component mounting machine control device, 21 ... production control computer, 23 ... optimization processing computer

Claims (4)

It is component data including shape data showing the shape characteristics of the component used for image processing of the component supplied to the component mounting machine and nozzle data for specifying the type of suction nozzle for adsorbing the component.
In the nozzle data, for parts that are sucked by a suction nozzle with a circular suction surface, the suction nozzle used for each part is specified by the nozzle diameter, and the suction nozzle with a special shape that cannot be specified by the nozzle diameter (hereinafter referred to as "special nozzle"). For the parts to be adsorbed by), specify multiple types of special nozzles that can adsorb the parts for each part.
The parts to be adsorbed by the special nozzle are component data in which a plurality of types of special nozzles capable of adsorbing the component are specified in order of priority for each component.
A suction nozzle that can be used in the component mounting machine and a suction nozzle that sucks the component from the suction nozzles with the nozzle diameter specified in the nozzle data is selected, and a special nozzle that can be used in the component mounting machine and A production program optimization method in which a special nozzle for adsorbing a component is selected from the plurality of types of special nozzles specified in the nozzle data and a mounting sequence is determined. The method for optimizing a production program according to claim 1, wherein the plurality of types of special nozzles capable of adsorbing the parts can be arbitrarily specified by the user who uses the parts data. In a method of optimizing a production program that controls the operation of each component mounting machine in a component mounting line configured by arranging a plurality of component mounting machines.
The process of allocating a plurality of types of parts required for the production of the component mounting board produced on the component mounting line to each component mounting machine, and
From the suction nozzles that can be used in each component mounting machine and the suction nozzles with the nozzle diameter specified in the nozzle data, select the suction nozzle that sucks the parts assigned to the component mounting machine, and use the special nozzle. For the component mounting machine to which the component to be sucked is assigned, select the special nozzle that sucks the component from the special nozzles that can be used in the component mounting machine and the plurality of types of special nozzles specified in the nozzle data. Then, the process of determining the mounting sequence of each component mounting machine and
Including the process of calculating the production cycle time of the component mounting line.
The optimization process of calculating the production cycle time of the component mounting line by executing the three steps by changing the combination of components assigned to each component mounting machine is repeated, and the production cycle time of the component mounting line is shortened. The method for optimizing a production program according to claim 1 or 2 , wherein parts are assigned to each component mounting machine to optimize the production program of each component mounting machine. A component that is mounted on a circuit board by executing a production program optimized by the production program optimization method according to any one of claims 1 to 3 and sucking a component supplied from a feeder with a suction nozzle or a special nozzle. In the mounting machine
The control device that executes the production program is a component mounting machine that executes a component suction operation and a mounting operation by using a suction nozzle or a special nozzle specified in the production program for each type of component supplied from the feeder. ..

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