JP3229697B2 - Component placement / mounting sequence optimization device for component mounting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a component placement / mounting order optimizing device for a component mounting device for shortening a component mounting time in a component mounting device such as a high-speed chip mounter.

[0002]

2. Description of the Related Art FIG. 2 shows a typical electronic component mounting apparatus. The electronic component device moves a plurality of cassettes 211 in which components are stored for each type, and supplies components to a predetermined component supply station S1, and receives components from the component supply unit 210 at the component supply station S1. The component transfer unit 220 sends the component to the predetermined component mounting station S13 and the mounting position on the printed circuit board 232 of the component sent to the component mounting station S13 by the component transfer unit 220 is determined by the component mounting station S.
13 is comprised of a printed circuit board position determining unit 230 that moves to 13.

[0003] The component supply section 210 is composed of a reel 212 in which a plurality of cassettes 211 provided for each component type are arranged in a line. In each cassette 211, a plurality of electronic components are housed wound around a tape. The component transfer unit 220 includes a circular index table 221 and a plurality of index heads 222 provided at regular intervals on an outer peripheral portion of the index table 221 and having suction nozzles. The number written in each index head 222 indicates a station number. The printed circuit board positioning unit 230 includes an XY table 231. A printed board 232 is mounted on the XY table 231.

[0004] Electronic components are mounted at predetermined positions on the printed circuit board 232 as follows. First, as the reel 212 reciprocates in the cassette arrangement direction in the component supply unit 210, the cassette 211 storing components to be taken out moves to the component supply station S1,
The electronic components in the cassette 211 are suction-held by the index head 222 of the component transfer unit 220.

[0005] When the index table 221 rotates intermittently in the clockwise direction, the electronic components sucked and held by the index head 222 pass through the stations such as the defective component detection station S6 and the component positioning station S9 to mount the components. Move to station S13.

The XY table 231 moves in the X and Y directions so that the mounting position of the electronic component sent to the component mounting station S13 on the printed circuit board 232 is located at the component mounting station S13. And
The component held by the index head 222 that has moved to the component mounting station S13 is
2 is mounted on the mounting position.

The movement of the reel 212 in the component supply unit 210 and the index table 221 in the component transfer unit 220
And the movement of the XY table 231 in the printed circuit board positioning unit 230 are performed in parallel. Therefore,
The time required for mounting the electronic component on the printed circuit board 232 is determined by the moving time of the reel 212 in the component supply unit 210, the rotation time of the index table 221 in the component transfer unit 220, and the position of the printed circuit board in each operation step. It is determined by the maximum value of the moving time of the XY table 231 in the unit 230.

The time required for moving the index head 222 of the component transfer section 220 at intervals of one station depends on the time required for processing such as component shape recognition, component positioning, and component rotation performed at each station. . That is, each of the stations S2 to S12 between the component supply station S1 and the component mounting station S13.
Of the processing time in the index head 22
This is the time required to move 2 by one station.

Therefore, in order to mount components on a printed circuit board in as short a time as possible in such an electronic component mounting apparatus, these time conditions must be taken into consideration.
It is necessary to determine the arrangement order of the cassettes 211 in the component supply unit 210 and the order of mounting the electronic components on the printed circuit board 223.

Ideally, for all combinations of the arrangement order of the cassettes 211 and the order of mounting the electronic components on the printed circuit board 232, the mounting time may be calculated and the combination that minimizes the mounting time may be selected. But,
The number of all combinations of the arrangement order of the cassettes 211 and the order of mounting the electronic components on the printed circuit board 232 becomes enormous, and it is actually impossible to obtain the mounting time for all the combinations.

Therefore, the present applicant has determined an arrangement of cassettes in consideration of a component distribution on a printed circuit board for each cassette, and has developed an optimization method of determining a component mounting order using a relaxation method. It was announced at the 3rd Intelligent FA Symposium (July 10-12, 1991). That is, in consideration of the fact that the movement of the reel 212 in the component supply unit 210 greatly affects the mounting time, the cassette arrangement is determined so that the movement of the reel 212 is as small as possible.

Hereinafter, a conventional optimization technique already developed by the present applicant will be described in detail. In the optimization method already developed by the present applicant, first, a cassette pair is determined, then the arrangement between the cassette pairs is determined, and finally, the component mounting order is determined.

Determination of Cassette Pair First, as shown in FIG. 7, the printed circuit board 232 is divided into a lattice and
The distribution pattern of all the electronic components P taken out from is obtained.

Next, as shown in FIG. 8, the component distribution patterns of the two cassettes 211 (in FIG. 8, cassette A and cassette B) are superimposed, and the component distribution pattern taken out of the two component cassettes 211 is obtained. This procedure is performed for all combinations (pair candidates) of the cassettes 211.

Next, a final cassette pair is determined based on the attribute of each pair candidate. Elements for determining the attributes of a pair candidate include the following four attribute determination elements a to d as shown in FIGS. 9A to 9D.

(A) Number of Distribution Areas a The number of distribution areas a indicates the number of areas on the printed circuit board 232 in which the parts extracted from the pair candidates are distributed. The smaller the number, the higher the attribute.

(B) Number change b The number change b indicates how much the number of component areas has changed before and after two cassettes become a pair candidate. The larger the number, the higher the attribute.

(C) How to overlap c The way to overlap c indicates the ratio of overlapping parts of the parts taken out of the cassettes constituting the pair candidates. The smaller the value, the higher the attribute. If the component area of one cassette is completely included in the component area of the other cassette, it is not adopted as a final pair.

(D) Inter-region distance d The inter-region distance is the total path length when the component regions are connected by the shortest path when the number of distribution regions is two or more. The smaller the distance, the higher the attribute.

The final pair determination is based on these elements a to
This is performed by applying d in accordance with the determination method in Table 1.

[0021]

[Table 1]

In Table 1, the prohibition means that when the component area of one cassette is completely included in the component area of the other cassette in the overlapping manner, the pair candidate is deleted. This means that a pair candidate having a high attribute indicated by the element to be selected is selected, and the restriction means that a pair candidate whose inter-region distance is equal to or less than a certain value is selected.

For example, when the number of distribution regions is two or three, first, a pair candidate whose inter-region distance is equal to or less than a predetermined value is selected from the pair candidates of two or three distribution regions (restriction). ). Next, from the selected pair candidates, the one with the smallest number change is selected (comparison). If the selected pair candidate does not touch the overlapping prohibition condition, it is determined as a pair (prohibition). At this time, if some candidate pairs still remain,
The one with the smaller overlapping value is selected (comparison).

In this manner, the determined cassette pair is constituted by cassettes in which components of the two cassettes are located close to each other, and the reel 212 frequently moves between the two cassettes. Is done.

Determination of arrangement between cassette pairs When the final cassette pair is determined in this way, the cost Ca between pairs for each cassette pair is given by the following equation (1).
The cassette pair arrangement that minimizes the sum of the inter-pair costs Ca is calculated by the vertical search.

[0026]

[Equation 1] Ca = min ｛L (P _A1 , P _B1 ) + L (P _A1 , P _B2 ), ...
+ L (P _An , P _Bm )｝

In Equation 1, P _Ai (i = 1, 2,... N)
, P _Bj (j = 1, 2,... M) and L (P _Ai , P _Bj ) are defined as follows.

P _Ai (i = 1, 2,... N): 2 constituting cassette pair A
P _Bj (j = 1, 2,..., M) included in one cassette: 2 forming cassette pair B
L (P _Ai , P _Bj ) included in one cassette: Distance between the component P _Ai of cassette pair A and the component P _{Bj of} cassette pair B

Therefore, the cost Ca between pairs is a value corresponding to the component distance between the two cassette pairs.

Determination of Component Mounting Order Next, the cost Cb between components of the two cassettes is determined. A part A stored in a cassette A and a cassette B
Is calculated by the following equation (2).

[0031]

## EQU2 ## Cb = T1 + T2

In Equation 2, T1 and T2 are defined as follows. T1: Time required for the component supply unit 210 to move between the cassette A and the cassette B T2: X between the mounting position of the component A and the mounting position of the component B
Time required for Y table 231 to move

Next, the component mounting order is determined by the relaxation method using the calculated inter-component cost Cb.

According to a trial calculation using the above optimization method, 3
%, For example, in the case of a printed circuit board that requires a mounting time of 60 seconds per sheet, it is possible to increase the production of about 40 sheets per day (3rd Intelligent FA Symposium (1991 July 10-12, Proceedings No.
See pages 187-188).

[0035]

SUMMARY OF THE INVENTION In the conventional method,
The above-described optimization of the component mounting order is performed based on the cassette arrangement determined above.
However, in the above-described determination of the component mounting order, as can be seen from Expression 2, since the time T2 irrelevant to the cassette arrangement determined above is involved, the reels between unpaired cassettes are involved. There is a possibility that the number of movements of 212 will increase. Therefore, in order to achieve better optimization, it is necessary to cooperate between the optimization of the cassette arrangement and the optimization of the component mounting order.

It is an object of the present invention to provide a component placement / mounting sequence optimizing apparatus of a component mounting apparatus which can cooperate between optimization of cassette arrangement and component mounting order to shorten mounting time. With the goal.

[0037]

A component placement / mounting sequence optimizing apparatus for a component mounting apparatus according to the present invention supplies a component to a predetermined component supply station by moving a plurality of cassettes in which components are stored for each type. A component supply unit, a component transfer unit that receives a component from a component supply unit at a component supply station and sends the component to a predetermined component mounting station, and mounting of a component sent to the component mounting station by the component transfer unit on the component mounted body. The component placement and placement of the component placement device with the component placement body positioning unit that moves the component placement body so that the position is located at the component placement station
In the mounting order optimizing apparatus, a cassette arrangement determining unit that determines the arrangement of the cassettes based on the mounting position of each component, a component supply unit for all components in the cassette arrangement determined by the cassette arrangement determining unit, and a component The component placement order determining means for determining the component placement order based on the moving time of the placement body positioning part, and the component placement order determined by the component placement order determining means, the cassette placement determining means so that the placement time is shortened. Cassette arrangement correcting means for correcting the determined cassette arrangement, wherein the cassette arrangement determining means selects a pair of cassettes to be arranged adjacently based on a component distribution pattern on a component mounted body for each cassette. Cassette pair determining means to be determined, and the cassette determined by the cassette pair determining means. The sequence of pairs with each other, and determined so that the distance of the component mounting between cassette pair is shortened,
A pair arrangement determining means for determining arrangement of all cassettes.

[0038]

The cassette arrangement correcting means determines whether or not the movement time of the component supply unit is longer than the movement time of the component transfer unit and the component mounting unit positioning unit in each operation step of the component mounting apparatus. The first to find the cost
Means, the cost between the cassettes, which is the sum of the step costs of the steps in which the movement of parts between the two cassettes takes place,
A second means for determining all cassette combinations,
The third means for correcting the cassette arrangement determined by the cassette arrangement determining means so as to reduce the interval between the cassettes of the combination of cassettes having the largest cost between cassettes, and the processing by the first to third means are repeatedly executed. Fourth means for causing

[0040]

First, the cassette arrangement is determined by the cassette arrangement determining means based on the mounting position of each component.
Next, in the cassette placement determined by the cassette placement determining means, the component placement order is determined by the component placement order determining means based on the movement time of the component supply unit and the component-placed body positioning unit for all components. You. Then, the cassette arrangement determined by the cassette arrangement determining means is corrected by the cassette arrangement correcting means such that the mounting time is shortened in the component mounting order determined by the component mounting order determining means.

[0041]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to the electronic component mounting apparatus of FIG. 2 will be described below with reference to FIGS. Since the electronic component mounting apparatus of FIG. 2 has already been described, the description thereof is omitted.

As described above, in order to obtain a better optimization result than the conventional method already developed by the present applicant, cooperation between optimization of the cassette arrangement and optimization of the component mounting order is required. It is necessary to plan. That is, it is necessary to reflect the result of the optimization of one of the optimization of the cassette arrangement and the optimization of the component mounting order or the information obtained during the optimization when performing the other optimization. There is. Therefore, it is conceivable that after the cassette arrangement and the component mounting order are determined by the conventional method, one of the cassette arrangement and the component mounting order is corrected so as to reflect the other result.

By the way, in general, the number of parts taken out from one cassette is plural, sometimes several tens, so that the total number of mounted parts is much larger than the total number of cassettes. Therefore, the number of combinations in the component mounting order is significantly larger than the number of combinations in the cassette arrangement. In addition, since the processing for each component is performed simultaneously in a plurality of stations S2 to S12 between the component supply station S1 and the component mounting station S13, it is impossible to estimate the exact mounting time in a state where the mounting order is not determined. It is. Therefore, it can be said that it is inefficient to optimize the mounting order by modifying the mounting order.

Therefore, in this embodiment, after the cassette arrangement and the component mounting order are determined by the conventional method, the cassette arrangement is corrected so that the mounting time is further shortened in the determined component mounting order.

A method for correcting the cassette arrangement will be described. The operations of the component supply unit 210, the component transfer unit 220, and the printed circuit board positioning unit 230 are performed in synchronization in operation step units. That is, during one operation step, the following operations are performed by the component supply unit 210, the component transfer unit 220, and the printed circuit board positioning unit 230. That is, in the component transfer unit 220, the index table 22
As the 1 rotates, the index head 222 moves to the next station, and each process is performed at the destination station. In the component supply unit 210, the reel 212 is moved so that the next cassette 211 is located at the component supply station S1. The printed board positioning unit 230 sets the XY position so that the next component mounting position on the printed board 232 is located at the component mounting station S13.
The table 231 moves. The maximum tact refers to a minimum time required for the component mounting apparatus to perform an operation in one operation step.

In the cassette arrangement correcting process, first,
For each operation step, the time Tr required to move the reel 212 in the component supply unit 210 and the component transfer unit 220
The time Ti required for the movement of the index head 222 and the time Tx required for the movement of the XY table 231 in the printed circuit board positioning unit 230 are represented by the following Expression 3,
4 and 5, respectively.

[0047]

Tr = (time required for the reel 212 to move the distance from the cassette from which the components were taken out in the previous operation step (n-1) to the cassette from which the components were taken out in the current operation step n)

[0048]

[Mathematical formula-see original document] Ti = max ( _Tn-1 , ₂ , _Tn-2 , ₃ ,...,
T _n−11 , ₁₂ ) where T _p and _q are the component supply units 21 in the operation step p.
This is the time required for processing performed at the q-th station for components supplied from 0.

[0049]

Tx = (from the mounting position of the component supplied from the component supply unit 210 in the operation step (n-13) to the mounting position of the component supplied from the component supply unit 210 in the operation step (n-12)) Time required for the XY table 231 to move)

Each time Tr, Ti, Tx is obtained using data prepared in advance. For example, time Tr is
As shown in Table 2, it is obtained based on data of the movement time of the reel 212 with respect to the distance between cassettes, which is the movement distance of the reel 212. Further, as shown in FIG. 3, the time Tx is obtained by using data of the movement time of the XY table 231 with respect to the distance between the mounting positions of the two components mounted on the printed circuit board 232 in successive operation steps.

[0051]

[Table 2]

Next, the time T for each operation step
Based on r, Ti, and Tx, the cost of each operation step (step cost Cc) is calculated by the following Expression 6.

[0053]

(Equation 6) Here, Tm indicates the highest tact, and C1 and C2 are predetermined constants.

That is, when the moving distance of the reel 212 is short, when the moving distance of the reel 212 is long, it takes time to move the index head 222 in the same operation step, or when the moving distance of the reel 212 is long, the same operation is performed. If the moving distance of the XY table 231 is long in the step, the operation step cost C
The value of c decreases. Conversely, although the moving distance of the reel 212 is long, the moving time of the index head 222 and X
When the moving distance of the Y table 231 is short, the value of the step cost Cc for the operation step becomes large. Therefore, in the operation step in which the operation step cost Cc is large, the movement time of the component transfer unit 220 and the movement time of the printed circuit board positioning unit 230 are shorter than the movement time of the component supply unit 210.

Next, all operation steps in which the movement time of the reel 212 of the component supply unit 210 does not end within the maximum tact Tm are selected. Reel 212 of component supply unit 210
As shown in Table 2 above, the time required for the movement of the reel 212 is determined by the distance between the cassettes, which is the movement distance of the reel 212. Therefore, an operation step in which the reel 212 moves by a predetermined distance or more is selected.

Next, the sum of the operation step costs Cc for the operation steps in which the movement of the component supply unit 210 occurs between the two cassettes is calculated, and the calculated result is the cost between these two cassettes (inter-cassette cost). It is said. The cost between cassettes is determined for all combinations of cassettes. Then, assuming that one or both cassettes of the pair of cassettes having the highest cost between cassettes are replaced with the cassettes located between these cassettes so that the cassette spacing is reduced. Time is calculated. The mounting time is calculated for all combinations of cassette exchanges with respect to the cassette pair having the largest cost between cassettes.

Then, an arrangement is selected in which the mounting time is minimum among the calculated mounting times and the mounting time is shorter than before the replacement is performed. When the rearrangement of the cassette is performed in this way, the above-described cassette rearrangement correction process is performed again based on the rearranged cassette arrangement. Then, the same processing is repeated until the rearrangement of the cassette does not occur or a predetermined number of times.

FIG. 1 shows the configuration of an optimizing device for optimizing the cassette arrangement and the component mounting order in the electronic component mounting device of FIG.

The operation unit 106 calculates the cost C between cassette pairs.
a, calculation processing of component costs Cb, step costs Cc, costs between cassettes, etc., cassette pair determination processing, cassette arrangement determination processing, mounting order determination processing, cassette arrangement correction processing, and the like.

The component data storage unit 101 stores data such as the type and mounting position of each component read from NC data (numerical control data). The cost table storage unit 104 stores the cost Ca between cassette pairs, the cost Cb between components, the step cost Cc, and the cost between cassettes obtained by the calculation unit 106. The cassette pair storage unit 102 stores data relating to the cassette pair determined by the cassette pair determination process. The cassette arrangement storage unit 103 stores data relating to the cassette arrangement determined by the cassette arrangement determining process. The data related to the cassette arrangement stored in the cassette arrangement storage unit 103 is updated by the cassette arrangement correcting process. The mounting order storage unit 105 stores the component mounting order determined by the mounting order determination process.

Hereinafter, the operation of the optimization device will be described. (1) First, data such as the type and mounting position of each component is read into the component data storage unit 101 from the NC data.

(2) Based on data such as the type and mounting position of each component stored in the component data storage unit 101,
A cassette pair is determined by a cassette pair determination process similar to that of the conventional method, and data relating to the determined cassette pair is stored in the cassette pair storage unit 102.

(3) Based on the data on the cassette pairs stored in the cassette pair storage unit 102, the inter-pair cost Ca is calculated using the above-described formula 1 described in the conventional method, and the calculation result is stored in the cost table storage unit. 104.

(4) Based on the inter-pair costs stored in the cost table storage unit 104, the cassette arrangement is determined by the same cassette arrangement determination processing as in the conventional method, and data relating to the determined cassette arrangement is stored in the cassette. It is stored in the arrangement storage unit 103.

(5) The conventional method has been described on the basis of data on the type and mounting position of each component stored in the component data recording unit 101 and data on the cassette arrangement stored in the cassette arrangement storage unit 103. Equation 2 above
Is used to calculate the inter-part cost Cb, and the calculation result is stored in the cost table storage unit 104.

(6) The component mounting order is determined by the component mounting order determination processing similar to the conventional method based on the inter-component cost Cb stored in the cost table storage unit 104, and the determined component mounting order is determined. Is the mounting order storage unit 10
5 is stored.

Thereafter, the cassette arrangement correcting process is performed as follows.

(7) On the basis of the cassette arrangement stored in the cassette arrangement storage unit 103 and the component mounting order stored in the mounting order storage unit 105, the time Tr, Ti, Tx for each operation step is calculated by the above equation (3). , 4, and 5, the step cost Cc of each operation step is calculated based on Equation 6, and the calculation result is stored in the cost table storage unit 104.

(8) For all combinations of cassettes, the sum of the step costs Cc for the operation steps in which the movement of the component supply unit 210 occurs between the two cassettes of each combination is calculated to determine the cost between cassettes. Then, the calculated cost between cassettes is stored in the cost table recording unit 104.

(9) Based on the inter-cassette costs stored in the cost table recording unit 104, the arrangement of the cassettes in the cassette pair having the largest inter-cassette cost is changed, and the mounting time is calculated. The smallest cassette arrangement is determined. Then, the contents of the cassette arrangement recording unit 103 are updated based on the determined cassette arrangement.

(10) If the above-mentioned processes (7) to (9) are repeated and the mounting time does not become shorter even if the cassettes are replaced, the cassette arrangement recording unit 103 and the mounting order recording unit 105 are referred to at that time. And the NC data is updated.

The cassette arrangement correcting process in the optimizing process performed by the optimizing device will be described more specifically. For convenience of explanation, here four types of parts A, B,
There are C and D, and those parts are A → B →
It is assumed that the mounting is repeated in the mounting order of C → D. In addition, it is assumed that all operations of each operation step of the component transfer unit 220 are completed within the maximum tact Tm.

FIG. 5 shows operation steps (n to n + 3) corresponding to one pattern when the cassettes are arranged in the order of A, B, C and D.
The type of the component to be moved to S13 and the movement time T of the component supply unit 210 for each operation step (n to n + 3)
r (sec), XY table movement time Tx (sec) of the printed circuit board positioning unit 230, operation step required time T
s (sec) and the step cost Cc are shown.

FIG. 6 shows operation steps (n to n + 3) for one pattern when the cassettes are arranged in the order of A, B, D and C.
The type of the component to be moved to S13 and the movement time T of the component supply unit 210 for each operation step (n to n + 3)
r (sec), XY table movement time Tx (sec) of the printed circuit board positioning unit 230, operation step required time T
s (sec) and the step cost Cc are shown.

When the inter-component cost Cb is calculated based on the above formula 2 without paying attention to only the individual components and taking into account the relationship between the components before and after the mounting order, it is better to arrange the cassette as shown in FIG. As compared to the arrangement shown in FIG.
The sum of the component costs Cb between B, BC, CD and DA (the sum of Tr and Tx in operation steps n to n + 3) is reduced. That is, in the conventional optimization method, the cassette arrangement shown in FIG. 5 is selected.

However, in the case where the cassettes are arranged as shown in FIG.
From the cassette 21 to the cassette A for three cassette pitches, the reel 21
2 moves, the moving time Tr of the reel 212 is set to 0.
53 (sec). In the arrangement shown in FIG. 5, the movement time of the XY table 231 in the operation step n is short, that is, 0.29 (sec).
The step cost Cc of the operation step n increases.

When the cassettes are arranged as shown in FIG. 6, the time during which the component supply unit 210 is moving while repeating one pattern (the sum of the Trs in the operation steps n to n + 3)
Is longer than the case of the cassette arrangement of FIG. 5, but as in the operation step n or the operation step n + 2,
When the movement time of 0 is long, the movement time of the XY table 231 is also long, and the dead time is relatively short, and the step cost Cc of these operation steps n and n + 2 is small.

When comparing the required time of one pattern between FIG. 5 and FIG. 6, the case of FIG. 5 is 1.22 (sec), whereas the case of FIG. 6 is 1.14 (sec). 6 is shorter.

According to the embodiment of the present invention, the cassette arrangement as shown in FIG. 5 is first obtained in the cassette arrangement determining process (4). Then, in such a cassette arrangement, the cost between cassettes is calculated in the process (8) through the processes (5), (6), and (7). In the cassette arrangement shown in FIG. 5, since the cost between cassettes between the cassettes AD becomes the largest, the cassette A or the cassette D is replaced with the cassette B or the cassette C in the process (9). That is, a cassette arrangement as shown in FIG. 6 is obtained.

It should be noted that the step cost C shown in FIGS.
c is the value of the constants C1 and C2 in the above equation 6 is 0.20.
Calculated as The cost used for exchanging cassettes is not the step cost shown in FIG. 5 but the cost between cassettes. However, in the above example, since the same pattern is repeated, the cost between cassettes is proportional to the operation step cost. You may think that. For example, in FIG. 5, it may be considered that the cost between cassettes between the cassettes AD is proportional to the step cost Cc of the operation step n, and the cost between the cassettes AB is proportional to the step cost Cc of the operation step n + 1.

[0081]

According to the present invention, it is possible to obtain a component arrangement and a mounting order in which the mounting time can be reduced.

[Brief description of the drawings]

FIG. 1 is an electric block diagram showing a schematic configuration of an optimizing device that optimizes a cassette arrangement and a component mounting order in an electronic component mounting device.

FIG. 2 is a plan view illustrating a schematic configuration of an electronic component mounting apparatus.

FIG. 3 is a graph showing a relationship between a distance between component mounting positions and a time required for moving an XY table.

FIG. 4 is a schematic diagram illustrating an example of a component mounting path.

FIG. 5 is a diagram showing a cassette arrangement obtained by a conventional method and various times, step costs, and the like in each operation step in the component mounting order shown in FIG. 4;

FIG. 6 is a diagram showing a cassette arrangement and various times, step costs, and the like in each operation step, which are obtained by the embodiment, in the component mounting order shown in FIG. 4;

FIG. 7 is a schematic diagram for explaining a method of creating a component distribution pattern.

FIG. 8 is a schematic diagram for explaining a method of creating a distribution pattern of pair candidates.

FIG. 9 is a schematic diagram for explaining an attribute determination element of a pair candidate.

[Explanation of symbols]

 Reference Signs List 101 component data storage unit 102 cassette pair storage unit 103 cassette arrangement storage unit 104 cost table storage unit 105 mounting order storage unit 106 arithmetic unit 210 component supply unit 220 component transfer unit 230 printed circuit board positioning unit

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H05K 13/02 H05K 13/04

Claims (2)

(57) [Claims] 1. A component supply unit that supplies a component to a predetermined component supply station by moving a plurality of cassettes in which components are stored for each type, and receives a component from the component supply unit at the component supply station and mounts a predetermined component. component transfer unit to send to the station, and the component transfer unit as mounted position on the component mounting body parts sent to the component mounting station is located in the component mounting station,
In a component placement / mounting sequence optimizing apparatus of a component placement apparatus having a component placement body positioning unit for moving a component placement body, a cassette placement determining means for determining a cassette placement based on a placement position of each component In the cassette arrangement determined by the cassette arrangement determining means, the component mounting order determining means for determining the component mounting order based on the movement time of the component supply unit and the component-receiving body positioning unit for all the components, and the component mounting Cassette arrangement correcting means for correcting the cassette arrangement determined by the cassette arrangement determining means so as to shorten the mounting time in the component mounting order determined by the order determining means , wherein the cassette arrangement determining means is provided for each cassette. Parts to be
Adjacent based on the component distribution pattern on the mounting body
A cassette pair deciding tool that determines the cassette pair to be placed
The cassette determined by the step and cassette pair determination means
The mounting of components between cassette pairs
Is determined so that the distance between
A component arrangement / mounting order optimizing apparatus for a component mounting apparatus, comprising: a pair arrangement determining means for determining an arrangement . 2. The apparatus according to claim 1, wherein said cassette arrangement correcting means comprises :
Component transfer unit and component mounting body for each operation step of the device
The moving time of the parts supply unit is longer than the moving time of the positioning unit.
A first means for determining a step cost regarding whether or not
Of the step where the transfer of parts between the two cassettes occurs
The cost between cassettes, which is the sum of the step costs,
Second means to determine cassette combinations, cassettes
Cassettes with the highest cassette cost
In the cassette arrangement determining means so that the interval between
Therefore, a third means for correcting the determined cassette arrangement,
And the processing by the first to third means is repeated.
Fourth means, the component placement and mounting order optimization unit of the component mounting apparatus according to claim 1, characterized in that it have the to rows.