JPS62219700A - Automatic sharing apparatus of parts feeder of automatic electronic parts mounting apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an automatic allocation device for allocating electronic components to component supply units in an electronic component automatic mounting machine equipped with a plurality of component supply units.

<Prior Art> Conventionally, automatic electronic component mounting machines have been used for the purpose of saving labor in mounting electronic components on a board.

Such automatic mounting machines are equipped with multiple component supply sections (hereinafter referred to as stations) in order to handle multiple types of electronic components used on boards, and these machines supply various electronic components used on boards to be automatically mounted. Each electronic component is set in a station, and the electronic components set in the station can be automatically mounted on a predetermined board without replacing them.

By the way, the setting or allocation of the set positions of various electronic components to the stations has been performed, for example, in the following manner.

-i-wise, multiple types of boards are manufactured in predetermined numbers (for each loft unit), so for example, a station table showing where in the station the electronic components to be used should be set is prepared for each predetermined board. When you create a different type of board and start mounting it, compare the station table corresponding to that board with the currently placed electronic components (or the station table showing the current parts placed status), and compare the electronic components shown in the station table with the station table that corresponds to the board. If the currently installed electronic parts are different, the electronic parts must be replaced. Of course, the program used is changed for each board so that the mounting order and mounting position are performed according to a program preset for each board.

In this way, the electronic components used and the mounting order differ depending on the board, and the number of stations is overwhelmingly insufficient for all types of electronic components used, so it is difficult to place the electronic components in the optimal station position for each board. If allocated to the board, there is a risk that most of the electronic components set in the station will need to be replaced for each board. For this reason, we are trying to shorten the setup time by standardizing the allocation position of electronic components to the stage gin as much as possible, for example by sacrificing the mounting order to some extent by setting the movement distance of the mounting to be the shortest. Ta.

<Problems to be solved by the invention> However, for example, when the number of boards to be hung on an electronic component automatic mounting machine increases due to the setting of a new product, in order to reduce the frequency of replacing electronic components set in the station, it is necessary to It is necessary to change and review the allocation positions of electronic components to stations that are set for each board. Conventionally, reviewing the layout positions using a new board has been done manually, which tends to result in individual differences and does not necessarily result in optimal layout. In addition, when new boards are introduced one after another, it takes time to review the layout positions, so there is a possibility that the review work cannot keep up and automatic mounting has to be carried out before optimization has been achieved. there were.

If optimal allocation is not performed, the number of parts that must be replaced each time the board is replaced will increase, increasing setup time. Furthermore, if it becomes necessary to create new station tables for all boards as a result of optimizing the layout positions, there is a risk of not correcting the station table or not making arrangements to change the mounting program due to changes in the station table. This has been a particular problem when new boards are frequently produced.

The present invention has been made in view of the above-mentioned problems, and is an automatic assignment method that can easily and reliably optimize the assignment positions of electronic components to stations in order to reduce the number of electronic components that need to be replaced on each board. The purpose is to provide equipment.

<Means for Solving the Problems> Therefore, in the present invention, as shown in FIG. In an automatic electronic component mounting machine that automatically mounts electronic components at predetermined positions, the data storage means reads and stores the allocation position of electronic components to be used with respect to a component supply unit adapted to a predetermined board and the production number of the predetermined board; an allocation position reorganization means for reorganizing pre-stored allocation positions for each board based on a combination of frequency of use of electronic components allocated to a predetermined component supply section obtained based on data stored by the means; a component supply section, comprising an update storage means for updating and storing the assigned layout position to the layout position reorganized by the layout position reorganization means; and an allocation position output means for outputting the stored layout position for each board. This configuration constitutes an automatic allocation device.

<Operation> According to the parts supply unit automatic allocation device having such a configuration, when a new board is generated, a station table (a table in which the electronic components to be used are assigned IPIs to each station according to the order of mounting, for example) and the station table applied to the new board are created. The production number of the board is read, and these data and the stored data for the existing board (the production number of each board and the stage table set for each board allocated by the automatic allocation device) are combined. The frequency of use of the electronic components assigned to each station is determined from the total results. Then, the quality of the allocation is determined based on a combination of the frequencies of use of the electronic components allocated to the predetermined stations, and the allocation positions of each board are reorganized based on the result of this determination. The reorganized electronic component accent f device for each board is stored in place of the allocation position before reorganization, and this updated and stored allocation position is output.

(Example> An embodiment of the present invention will be described below.

First, an example of an automatic electronic component mounting machine to which the present invention is applied will be schematically explained based on FIG. 2.

In the figure, a component storage section 1 is provided with a plurality of stations (not shown), and electronic components set in each stage are sequentially taken out by a sequencer section 3 provided in a main body 2, and a mounting head 4, it is mounted (inserted) on the board. The board is transported in the direction of the arrow in the figure by the board transport section 5 and supported below the mounting head 4. The sequencer section 3. The mounting throat 4 and substrate transport section 5 are controlled by a control device 61.

That is, the mounting position and mounting order of the electronic component on the board corresponding to a predetermined board are programmed in advance, and the control device 6 automatically mounts the electronic component in accordance with this program.

Next, an embodiment of an automatic parts supply section (station) allocation device according to the present invention will be described.

FIG. 3 is a flowchart showing the outline of the automatic allocation device in this embodiment, and the outline will first be explained here.

81 as a data storage means is a station table (a list of used electronic component names assigned to each station according to the optimal mounting order) created in response to new boards generated due to new product settings, etc. Enter the name of the electronic component and the production number of the new board.

In S2, weighting (setting of frequency of use) is performed for each electronic component according to the number of production (number of productions) based on the name of the electronic component used in the new board input in Sl and the number of production.

In S3, data on the new board is added to the frequency of use of each electronic component weighted by the already stored station table for each board and the production number of that board, and the data for all boards in each station run is calculated. Calculate the names of electronic parts used and their frequency of use.

In S4, the optimum allocation position is determined based on the total result, that is, the combination of the frequency of use of the electronic components allocated to a predetermined station, and the combination of the frequency of use of the electronic components allocated to each station is optimized. In this way, the station table for each board is reorganized, that is, the arrangement of electronic components used in each station table is changed,
To minimize the need to replace electronic components set in a station when a board to be hung on an automatic mounting machine is changed. Then, the stored station table before reorganization for each board is updated to a station table as a result of reorganization and stored.

The above 82 to S4 correspond to the allocation position reorganization means and update storage means.

The layout position output means 85 outputs the updated and stored new station table for each board by printing it out or displaying it on a screen. This allows you to check the changes in the station table for each board due to the settings of a new board, and after reorganizing the station table or when changing the board to be loaded onto the automatic mounting machine, check this output result to see if the electronics that have been sent to the station are Replace parts as necessary.

Each step outlined above will now be described in detail.

In Sl, a station table of a new board and its production number are input, and this station table is created, for example, as follows.

First, the mounting order is determined from the mounting position data of all electronic components used on the new board. As a general rule, this mounting order starts from the position closest to the origin of the mounting head 4 of the automatic mounting machine (a unit that supports and mounts electronic components on the board; see Figure 2), and starts with the distance that the mounting head 4 moves. It is determined that the same electronic components (or electronic components of the same group) set in t stations are mounted consecutively so that the number of electronic components is as small as possible.

Once the mounting order is determined in this way, electronic components are assigned to each station according to the station floor (number of each station) in order of mounting order, starting with the electronic component having the lowest mounting order.

Next, weighting by the production number of each electronic component in 82,
That is, the setting of the frequency of use of electronic components assigned to each station will be explained.

The electronic component name is received as data for each station M from the station table input in Sl, and first, the usage frequency of each electronic component is set as 1.

Then, as shown in Table 1, for example, the frequency of use of each electronic component is set by multiplying it by a weighting constant set according to the production quantity. Therefore, the frequencies of use of all electronic components used for a given board are all the same.

In this embodiment, as described above, a weighting constant preset according to the number of products produced is used to set the frequency of use, but the number of products produced may be used as is.

When the frequency of use of the electronic components used in the new board is set in S2, in S3, the name of the electronic components used in each other board and the frequency of use of this electronic component are set in S3.
Adding the data on the new board, the frequency of use of a given electronic component within each station is totaled.

For example, as shown in Table 2, for all 2 boards including the new board (■) and each of the boards (1) to (2), each board is determined based on the electronic component names (a, h, ~) stored for each station and their frequency of use. The frequencies of use of the same electronic components for each station are totaled, and the electronic components used for each station and their frequency of use are determined.

Therefore, in the case of Table 2, the total results for station floor 1, for example, are a/2R, c/l.

In S4, the station table for each board is reorganized based on the total result, and the stored stage thin table for each board is updated to the station table of the reorganization result and stored.

The above reorganization is performed as follows.

That is, from the above-mentioned aggregation results, the frequency of use of electronic components used at a predetermined station is ranked. This is calculated by determining the ratio of the usage frequency of a given electronic component to the total usage frequency, in other words, the ratio of the number of boards produced in which a given electronic component is used at a given station to the total number of boards produced, and for example, 50% or more is Rank, 20-50%
is ranked B, 5% to 20% is ranked C, and 0% to 5% is ranked D.

For example, if two types of electronic components, a and b, are allocated to the stage engine Nll with 1ffi on all boards, and the total usage frequency of a is 75 and the total usage frequency of b is 25, then a has an A rank. It is a part, and b is a B rank part.

Then, the reorganization of electronic components to be allocated to a station is determined based on the combination of ranks of electronic components used at a given station. The reorganization judgment based on the combination of ranks is performed as shown in Table 3, for example.

In Table 3, A to D indicate the ranks of the frequency of component use described above, and "Empty" indicates the vacant state of the station. In addition, the "◎" symbol in the table indicates the best combination, the "○" symbol indicates a good condition, the "△" symbol indicates a combination that can be used but should be avoided as much as possible, and the "×" symbol indicates a combination that cannot be used. Indicates the combination state, and when the tally result is in the above-mentioned "△" or [xJ] state, parts will be replaced frequently if the combination remains as it is, and the stage 9 position of any of the assigned electronic components will be changed. Indicates that changes need to be made.

First, a case will be described in which it is determined from the counting results that there is only one type of electronic component allocated to a predetermined station among all the boards.

For one A-rank electronic component that is frequently used, the station is It is desirable to make the station dedicated to the A-rank component and not set any other types of electronic components (the dedicated state of such a station is indicated by the combination of the predetermined use frequency rank and "empty" in Table 3). ).

On the other hand, if a D-rank electronic component that is used extremely infrequently occupies one station, the electronic component at that station will be used on only a small number of boards out of the total number of boards in an automatic mounting machine with a limited number of stations. As a result, the station's availability rate is extremely poor.

Therefore, if it is determined from the aggregation results that only one type of electronic component is assigned to a given station (the station is dedicated to that electronic component), the electronic component may be allowed to be dedicated depending on its usage frequency rank. It is determined whether

That is, the best state is to dedicate the A-rank electronic components, which are frequently used, to the station, and the station cannot be dedicated to the D-rank electronic components, which are the least frequently used. Of course, a combination of "empty" and "empty" in which the station is completely vacant is not allowed. Although it is not desirable to dedicate a station to an electronic component whose frequency of use is C rank, it should be done when combination with other electronic components cannot be achieved satisfactorily.

Next, a case will be described in which it is determined from the counting results that two types of electronic components are used at a predetermined station.

When frequently used electronic components (A rank or B rank) are assigned and combined in one station, in extreme cases, it is common to have to replace the electronic components set in the station every time the board is changed. Therefore, electronic components that are used less frequently are combined and assigned to predetermined stations. If electronic components that are used infrequently are combined, the electronic components of that station may not be mounted on the board, but since they are used less frequently, the frequency of component replacement will naturally decrease.

Furthermore, electronic components that are used less frequently and electronic components that are used more frequently may be combined (for example, B-rank parts and D-rank parts). This is because the station is almost exclusively occupied by frequently used parts.

Therefore, in Table 3, combinations of ranks with high frequency of use are set to be in an impossible state, and combinations of ranks of low rank are set to be in a good state.

On the other hand, if it is determined from the aggregation results that there are three or more types of electronic components to be allocated to a given station,17 the most used electronic components will be used at the stage before adding a new board (in a state where the optimal allocation has been made using the existing method). A comparison study is made between the frequently used electronic components and the frequency of use of the electronic components assigned to the new board, and the combination of electronic components assigned to a predetermined station is determined in the same way as the determination based on the combination of electronic components in the above-mentioned two persimmon cheeks. Determine the quality of the product.

Depending on the quality of such allocation (combination), if it is determined that the combination should not be allocated (or should not be dedicated) to a given station, electronic components that are used more frequently will be allocated to that station with priority.
Move less frequently used electronic components to other stations (
The stations that are located as close to each other as possible are assigned to the stations that provide the optimal combination.

As a result, the station table corresponding to the existing board and the station table created corresponding to the new board can be used to avoid replacing the electronic components set in the station as much as possible when the board to be hung on the automatic mounting machine changes. Reorganized into an optimal station table.

Note that this reorganization of the station table often changes the station table that was applied to the existing board, so it is necessary to change the station magnetics of the existing mounting order program that is set based on the station floor. be. Therefore, this renumbering work may be incorporated into the automatic allocation apparatus 9 of this embodiment, so that the mounting order program can be changed together with the station table.

The updated and stored new station table is output as necessary in S5. After entering data for a new board, there is a high possibility that the existing station table will change.
For example, if a station table for an existing board has been printed out, it is discarded and a new station table is printed out and used.

As described above, when a new board is set, by inputting the station table created for that board and the production number of that board, the data set in each station is calculated by aggregating the data for existing boards. The information is rearranged into a station table that minimizes the frequency of electronic component replacement and is output. Therefore, the allocation of electronic components to each station can be easily and consistently optimized, and even when new boards are being installed one after another, the allocation positions can be sequentially reviewed without delay.

Furthermore, since the number of electronic components set in the station is reduced, mounting work can be started with minimum setup time even if the board to be hung on the automatic mounting machine is changed. Furthermore, if fewer electronic parts are replaced, errors in replacement work will naturally be reduced.

<Effects of the Invention> As explained above, according to the present invention, the quality of the assignment is determined based on the usage frequency of the electronic components assigned to each station, and the station table is arranged so that the electronic components set in the station do not need to be replaced as much as possible. This allows the optimal allocation of electronic components to be performed simply and reliably.

Therefore, even if new boards are set one after another, optimization can be achieved without delay, and the setup time in the automatic mounting machine can be shortened.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of the present invention, FIG. 2 is a plan view showing an example of an automatic electronic component mounting machine to which the present invention is applied, and FIG. 3 is a flowchart showing an embodiment of the automatic allocation device according to the present invention. It is. 1... Component storage section 2... Main body 3... Sequencer section 4... Mounting head 5... Board transfer section 6... Control device

Claims (2)

[Claims] (1) In an electronic component automatic mounting machine that includes a plurality of component supply sections and automatically mounts each electronic component set in the plurality of component supply sections at a predetermined position on a board, the component supply section is adapted to a predetermined board. a data storage means for reading and storing the allocation positions of the electronic components to be used and the production number of the predetermined board; and a usage frequency of the electronic components allocated to the predetermined component supply section obtained based on the data stored by the data storage means. an allocation position reorganization means that reorganizes the layout positions stored in advance for each board by a combination of the above, and an update that updates and stores the layout positions stored in advance for each board to the layout positions reorganized by the layout position reorganization means. An automatic component supply section automatic allocation device for an automatic electronic component mounting machine, comprising a storage means and a layout position output means for outputting the stored layout position for each board. (2) The allocation position reorganization means reorganizes allocation positions so that frequently used electronic components and less frequently used electronic components or less frequently used electronic components are allocated to each other in a predetermined component supply section. An automatic component supply section automatic allocation device for an electronic component automatic mounting machine according to claim 1.