JP3844631B2 - Component mounting apparatus and recording medium - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a component mounting apparatus and a recording medium for mounting components on a printed board.
[0002]
[Prior art]
Conventionally, devices that automatically mount components (components such as resistors and capacitors) on a printed circuit board are attached by taking out the components attached to the tape wound on the reel from the component stocker and inserting them at the corresponding positions on the printed circuit board. It is mounted on a printed circuit board by soldering in a later process.
[0003]
At this time, there is a failure such that a component taken out from the reel cannot be inserted into the corresponding position of the printed circuit board well or falls before being inserted. In order to obtain this failure data, a large-scale mechanism for taking out the data stored in the mounting apparatus is required.
[0004]
[Problems to be solved by the invention]
As described above, there is a problem in that it is necessary to take out and collect data inside the mounting apparatus with a large-scale mechanism in order to obtain data on a failure when mounting a component on a printed circuit board. For this reason, it is desired to grasp a scrap when a component is mounted on a printed circuit board by a simple method.
[0005]
In order to solve these problems, the present invention counts the number of components mounted on a printed circuit board for each mounter and records the count value for each reel, and easily calculates the number of failures based on these. The purpose is to calculate.
[0006]
[Means for Solving the Problems]
Means for solving the problem will be described with reference to FIG.
In FIG. 1, a component mounting apparatus 1 mounts (mounts) a component on a printed circuit board.
[0007]
The processing apparatus 11 performs overall control of the whole, and here is constituted by a loss calculation means 13 and the like.
The scrap calculation means 13 calculates the number of scraps based on the number of printed circuit boards that have completed mounting of the components for each reel from the component mounting apparatus 1 and the total number of components mounted on the reels. is there.
[0008]
Next, the operation will be described.
The mounter composing the component mounting device 1 takes out the specified number of components from the reel and mounts them at the corresponding position on the printed circuit board. The sensor 2 counts the number of components that have been mounted on the printed circuit board by the mounter. The calculation means 13 calculates the number of failures based on the number of components that have been mounted for each reel by the sensor 2 and the total number of components attached to the reel.
[0009]
At this time, the total number of mounted printed circuit boards for each reel detected by the sensor 2 by the loss calculation means 13 is multiplied by the number mounted for each designated printed circuit board to obtain the total number of mounted circuit boards. The number obtained by subtracting the total number of mounted parts from the total number of parts is calculated as the number of lost parts.
[0010]
Further, when the scrap calculation means 13 repeatedly mounts the component attached to the reel on the printed circuit board, and when the component attached to the reel is exhausted, the next reel is attached and repeated, and the sensor 2 detects for each reel. Arrange the number of printed circuit boards that have completed mounting of the counted components in order, calculate the cycle T2 between the number of printed circuit boards that have been mounted, and the number of reels that have a large number of mountings. The cycle T1 of the number of reels having a large number of printed circuit boards that have been completed is calculated, a cycle difference ΔT obtained by subtracting the cycle T1 from the cycle T2 is obtained, and the number of components mounted on one printed circuit board in the cycle difference ΔT The number multiplied by is calculated as the number of lost items.
[0011]
In addition, the number of failures is obtained by multiplying the obtained number of failures by a variation coefficient α corresponding to the variation in the number of components attached to the reel.
Therefore, it is possible to count the number of components mounted on the printed circuit board for each mounter and to record the count value for each reel, and to easily calculate the number of failures based on these count values.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments and operations of the present invention will be described sequentially in detail with reference to FIGS.
[0013]
FIG. 1 shows a system configuration diagram of the present invention.
In FIG. 1, a component mounting apparatus 1 mounts (mounts) a component on a printed circuit board, and includes a lane, a mounter, a conveyor, a PT plate detection sensor 2, and the like as shown in FIG. Is.
[0014]
The sensor 2 counts the printed circuit boards on which component mounting has been completed. The data conversion device 3 performs data conversion between the component mounting apparatus 1 and the processing apparatus 11 for transmission / reception.
[0015]
The processing device 11 performs various processes in accordance with a program. Here, as shown in the figure, the calculation means 12, the input means 15, the display means 16, the data storage means 17, the output means 18, and the external communication means 19 are shown. Etc.
[0016]
The calculation means 12 performs various calculation processes, and here is the loss calculation means 13 or the like.
The defect calculation means 13 calculates the number of defects based on the number of printed circuit boards on which components have been mounted and the total number of components mounted on the reel, as counted by the sensor 2 provided in the component mounting apparatus 1. Is.
[0017]
The input means 15 is for inputting data and instructions.
The display means 16 displays a calculation result failure on the screen.
The data storage means 17 stores various data such as the number of printed circuit boards on which components mounted from the component mounting apparatus 1 have been mounted, the total number of components mounted on the reels, and the like.
[0018]
The output means 18 outputs various data.
The external communication unit 19 outputs data to an external device, receives data from an external device, and stores it in the data storage unit 17.
[0019]
Next, the configuration of the component mounting apparatus 1 in FIG. 1 will be described in detail with reference to FIG.
FIG. 2 shows a configuration example of the component mounting apparatus of the present invention.
FIG. 2A shows an overall system configuration diagram of the component mounting apparatus 1.
[0020]
In FIG. 2A, a parts stocker 21 is provided with lanes 1 to n and loaded with reels 3 of predetermined parts.
The mounter 22 mounts a component on a printed circuit board. Here, a component pin taken out from a predetermined reel 31 is automatically inserted into a hole at a predetermined position of the printed circuit board that has been conveyed on the conveyor 23. Etc. Here, the two mounters (1) and (2) are connected by the conveyor 23, and the printed circuit board is sequentially conveyed to mount the components.
[0021]
The PT board detection sensor 24 is provided for each mounter 22 and counts the number of printed boards on which components have been mounted by the mounter 22 and detects the type of the printed board.
[0022]
FIG. 2B shows an example of a reel. The reel 31 is attached to each lane of the component stocker 21 in FIG. 2A and automatically supplies the component to the mounter 22. The reel 31 is wound with the component attached to the tape, and the reel number is attached to the side surface. It is displayed (for example, OCR characters or barcode printing) and can be automatically read by a reader.
[0023]
By configuring the component mounting apparatus as described above, the mounter 22 removes the component from the reel 31 and mounts it on the printed circuit board. The printed circuit board on which the component is mounted is counted by the PT plate detection sensor 24 and the printed circuit board is mounted. The type is detected and conveyed to the next mounter 22 or the next process by a conveyor. Based on the number n of printed circuit boards that have completed mounting of components for each reel and the type of printed circuit board, as will be described later with reference to FIGS. It becomes possible to do. This will be described below.
[0024]
FIG. 3 shows a flowchart for explaining the operation of the present invention.
In FIG. 3, (1) inputs a printed board to be produced. Here, the type of printed board to be produced, for example, “AAA” is input.
[0025]
(2) reads the reel component to be mounted. This is because the component mounting apparatus 1 of FIG. 1 reads the data of the reel components mounted on the type “AAA” of the printed board to be produced (input) from the processing apparatus 11 in (1).
[0026]
In (3), the count number of the PT plate detection sensor 24 at the time of mounting is recorded.
In (4), it is determined whether the printed board to be produced is changed. In this case, it is determined whether the type of the printed board input in (1) is different from the type currently produced and the type is changed. In the case of YES, for example, since the type of the currently produced printed board has been found to be changed from “AAA” to “BBB”, the process proceeds to (9). On the other hand, in the case of NO, for example, the type of the currently produced printed board is “AAA” and the type of the newly produced printed board is “AAA”, which is the same. Go to 5 ▼.
[0027]
In (5), since it has been found that the same type of printed board is produced with NO in (4), the reel parts that have used up the parts are read. In this case, when the components are sequentially mounted on the same type of printed board and the reel components are used up, the reel number (bar code) of the reel components is read and recorded.
[0028]
In (6), the count value (nx) of the sensor at the time of reading is recorded.
In (7), the new reel number and sensor count value are recorded.
In (8), it is determined whether or not the process is finished. This determines whether the production is the scheduled quantity and the production is finished. If YES, the process ends. If NO, return to (2) and repeat.
[0029]
In (9), if the answer to (4) is YES, the type of printed circuit board on which the component is mounted has been found to be changed, so the sensor count value at the time of the change is recorded (nx '), and in (1) Repeat back.
[0030]
As described above, the components are repeatedly taken out from the reel and mounted on the printed board, and when the components attached to the reel are used up, the reel number and the count value of the PT plate detection sensor 24 are recorded, and the reel of a new reel The number and the count value of the PT plate detection sensor 24 can be recorded. Based on these, it is possible to calculate the component loss according to FIGS. 4 to 7 described later. This will be described below.
[0031]
FIG. 4 shows an explanatory diagram (part 1) of the present invention.
FIG. 4A shows an example of data in which the type of printed board on which the component having the lane number of the mounter (1) is mounted is registered. Here, for example, registration is performed as shown below.
[0032]
Lane number 1 Lane number 2
Model AAA Parts a Parts b
Number N11 Number N12
Model BBB Part a 'Part b'
Number N21 Number N22
For example, in the case of producing the upper-layer printed board model AAA, N11 parts a are sequentially taken out from the lane number 1 of the mounter (1) and mounted at the corresponding positions on the printed board. An example of data in which N12 parts b are sequentially taken out and mounted at corresponding positions on the printed board is shown. Similarly, when the printed board model BBB is changed, an example of data in which the illustrated number of components shown in the figure is taken out from the lane and mounted at the corresponding position on the printed board is shown.
[0033]
FIG. 4B shows an example of data in which the type of printed board on which the component with the lane number of the mounter (2) is mounted is registered. Similar to the mounter (1), it represents data indicating that the illustrated components are sequentially extracted from the illustrated lane number and mounted at the corresponding positions on the printed board.
[0034]
4C shows a state in which the components a and b are mounted on the printed board by the mounter (1) in FIG. 4A and the components x and y are mounted on the printed board by the mounter (2) in FIG. 4B, respectively. Indicates. As shown in the figure, the number N11 of the component a is extracted from the lane number 1 of the first mounter (1) in FIG. 2 and mounted on the printed board, and the number N12 of the component b is extracted from lane number 2 and mounted on the printed board. Similarly, the number N11 ′ of the component x is extracted from the lane number 1 of the second mounter (2) and mounted on the printed board, and the number N12 ′ of the component y is extracted from the lane number 2 and mounted on the printed board. Show the state.
[0035]
As described above, each mounter corresponds to the specification of the type of the printed circuit board based on the data registered in the table with the name and number of parts to be mounted for each lane number of the mounter in association with the type of printed circuit board. It is possible to take out the designated number of the relevant parts from the relevant lane number and mount them on the designated printed board position. When repeatedly mounting this component on the printed board, as shown in the flowchart of FIG. 3 described above, record all the number of printed boards and reel numbers when the components are completely mounted when the reel parts are exhausted. By doing so, it becomes possible to obtain a scrap by calculation described later.
[0036]
FIG. 5 shows an explanatory diagram (part 2) of the present invention.
FIG. 5A schematically shows the relationship between the actual (actual) number n and the number of scraps produced by the total number of reel parts attached to the reel, and the theoretical number N and the remainder m. here,
The theory is that, as shown in the figure, N printed boards are completed using a predetermined number of parts, and the remainder is m.
[0037]
As shown in the figure, the actual results are that n printed boards have been completed using a predetermined number of parts, and the rest are regarded as scraps.
FIG. 5B shows the relationship between the theory described in FIG. 5A and actual results.
[0038]
In the case of theory: T = P × N + m
・ In case of actual results: T = P × n + (total of scraps)
It becomes. Here, T represents the reel component quantity (total number of components attached to the reel), and P represents the component usage (number of components used for one printed board).
[0039]
For example, when T = 1000 and P = 22,
Theoretically, 1000 ÷ 22 = 45 remainder 10 and the printed board N = 45, and the remainder m = 10. Since this remainder is used for mounting the next printed board, FIG. As shown in the figure, if it is repeated with reels 1, 2, 3, 4, 5 and 6, the number of remainders is 10 each time, but the remainder is accumulated on the next printed circuit board, so the remainder is accumulated. . Then, up to reel 6 can be mounted on 272 printed boards, and the cumulative number of remainders is 16.
[0040]
On the other hand, in the actual results, as shown in the uppermost result column in the upper part of FIG. 5 (c), the reels 1, 2, 3, 4, 5, and 6 shown in FIG. Thus, it is assumed that 44, 46, 44, 45, 45, and 45 are counted (actually mounted and used as the count value of the sensor 24 at that time). When the number of failures and the total number of failures are calculated in this case, it is as shown in the figure. The reels 1 to 6 can be mounted on 269 printed boards, resulting in a total of 82 scraps.
[0041]
FIG. 6 is a flowchart for explaining the operation of the present invention (work loss calculation, part 1).
In FIG. 6, (1) takes in the number of productions. This takes in the number of printed board productions nx (the number of printed board nx with components mounted on one reel) recorded in (6) of the flowchart of FIG.
[0042]
(2) takes in theoretical values. This takes in the lower theoretical value (the number of printed boards on which components can be mounted with one reel) in FIG.
(3) determines whether there is a difference between (1) and (2). In the case of YES, it is found that the number of printed boards that can be mounted on one reel in theory differs from the number of printed boards that can be mounted on one reel detected by the PT board detection sensor 24 in FIG. , (4), this different number (difference) is recorded as a failure. On the other hand, in the case of NO in (3), the process returns to (1) and the production of the next reel is repeated.
[0043]
In (5), it is determined whether or not the end. If yes, go to (6). On the other hand, if NO, return to {circle around (1)} and repeat.
(6) calculates the cumulative total of scraps. For this, the cumulative total of the number of failures recorded as the failure in (4) is obtained and recorded as the cumulative number of failures during the production of the specified type of printed board.
[0044]
As described above, the count value of the printed board mounted for each reel from the PT board detection sensor 24 of FIG. 2 described above is compared with the number of printed boards produced by one reel produced in theory. When there is a difference, the difference is recorded as a scrap, and the number of printed boards by all reels is compared to obtain a cumulative total of the differences, and the finish at the time of production of a series of printed boards of that type. By calculating the cumulative number of losses, it is possible to easily calculate the number of parts lost.
[0045]
FIG. 7 is a flowchart for explaining the operation of the present invention (work loss calculation, part 2).
In FIG. 7, (1) takes in the number of productions. This means that the printed board production number nx (the number nx of printed boards on which components are mounted on one reel) recorded in step (6) in the flowchart of FIG.
[0046]
(2) takes in theoretical values. In this case, the lower theoretical value (the number of printed boards on which components can be mounted on one reel) in FIG.
[0047]
(3) finds the average T1 of the periods of parts that can be produced in large quantities with theoretical values. In (2), the number of printed boards on which components can be mounted from one reel is arranged in order, and an average T1 of the periods (reels) that can be produced in large quantities is obtained.
[0048]
(4) finds the average T2 of the periods of the parts that can be produced in large quantities with actual results. For this, the number of printed boards on which components can be mounted from one reel in (1) is arranged in order, and the average T2 of the periods (reels) that can be produced in large quantities is obtained.
[0049]
(5) indicates that when the total number of original parts is constant (when the total number of parts attached to all of the reels is constant)
T2−T1 = ΔT
ΔT × (number of use of one PT plate) = predicted number of failures. Here, T2−T1 = ΔT, a difference ΔT between the period T2 of the part that can be produced in large numbers in actual results and the period T1 that can be produced in large quantities in theory is obtained, and ΔT × (number of used PT plates) = defect prediction The difference ΔT is calculated by multiplying the difference ΔT by the number of parts used for one printed board to obtain the number of failures.
[0050]
(6) If there is a variation in the total number of original parts (if there is a variation α in the total number of parts mounted on all reels),
T2−T1 = ΔT
ΔT × α × (number of use of one PT plate) = number of predicted loss α: coefficient of variation (calculated by experiment)
Calculate as Here, T2−T1 = ΔT, a difference ΔT between the period T2 of the part that can be produced in large numbers in actual results and the period T1 that can be produced in theory is obtained, and ΔT × α × (number of used PT plates) = Based on the predicted loss number, the difference ΔT is multiplied by the number of parts used for one printed board and the variation α to obtain the predicted number of losses.
[0051]
【The invention's effect】
As described above, according to the present invention, the number of components mounted on a printed circuit board is counted for each mounter, and the count value for each reel is recorded. Since the calculation configuration is adopted, it is possible to calculate the number of parts lost by simple measurement of counting the number of printed boards produced for each reel.
[Brief description of the drawings]
FIG. 1 is a system configuration diagram of the present invention.
FIG. 2 is a configuration example of a component mounting apparatus according to the present invention.
FIG. 3 is a flowchart for explaining the operation of the present invention.
FIG. 4 is an explanatory diagram (part 1) of the present invention.
FIG. 5 is an explanatory diagram (part 2) of the present invention.
FIG. 6 is a flowchart for explaining the operation of the present invention (work loss calculation, part 1).
FIG. 7 is a flowchart for explaining the operation of the present invention (work loss calculation, part 2).
[Explanation of symbols]
1: Component mounting device 2: Sensor (PT plate detection sensor)
11: processing device 13: scrap calculation means 21: parts stocker 22: mounter 23: conveyor 24: PT plate detection sensor 31: reel 32: reel number

Claims (5)

In component mounting equipment that mounts components on printed boards,
A reel on which a predetermined number of components to be mounted on a printed board are attached;
A mounter that takes out a specified number of parts from the reel and mounts them at the corresponding position on the printed board,
A sensor that counts the number of printed boards produced by the one reel that has completed mounting the component to the printed board by the mounter;
Based on the number of printed boards produced on the one reel counted by the sensor and the total number of parts attached to the reel, the number of scraps (the number of all remaining parts not mounted) is calculated. A component mounting apparatus comprising: means for calculating. The above means finds the total number of printed boards produced on one reel counted by the counter multiplied by the number mounted on each designated printed board, and obtains the total number of parts mounted on the reel. 2. The component mounting apparatus according to claim 1, wherein a number obtained by subtracting the obtained total mounting number from the total number is calculated as the number of lost parts. The number of printed boards produced with one reel counted by the counter when the parts attached to the reel are repeatedly mounted on the printed board and the next reel is attached and repeated when there are no more parts attached to the reel. Means for calculating the period T2 between the reels having a large number of printed boards produced by the one reel ,
Means for calculating a cycle T1 between reels having a large number of printed boards that have been mounted in an ideal case with no failure;
And a means for calculating a period difference ΔT obtained by subtracting the period T1 from the period T2 and calculating a number obtained by multiplying the period difference ΔT by the number of components mounted on one printed board as the number of failures. The component mounting apparatus according to claim 1.   A component management apparatus characterized in that the number of failures obtained by multiplying the number of failures determined in claim 3 by a coefficient of variation α corresponding to a variation in the number of components mounted on the reel is used. On the computer,
Means for counting the number of printed boards produced by the one reel that has been mounted on the printed board by a mounter for mounting the parts taken out from the reel on the printed board based on a signal from the sensor;
Based on the number of printed boards produced on the one reel counted by the above means and the total number of parts mounted on the reel, the number of scraps (the number of all remaining parts not mounted) is calculated. A computer-readable recording medium having recorded thereon a program that functions as a means for performing the above.

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