JP2002314292A - Component mounting method and component mounting device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a method of sorting mounted components that can achieve a tact balance between mounting machines for mounting mounted components and can reduce the number of cuts of components of a feeder. SOLUTION: CA including information on a board on which a component is mounted is provided.
The number Np of types of components to be mounted is obtained based on the D data, and the number Np of types and the maximum number of feeders N of the mounting machine to be used are obtained.
The optimum number Ng of mounting machines is obtained based on f and the number Nf of all the feeders of the mounting machines of the optimum number Ng and the number Np of the types of the mounting parts are used to determine the mounting parts of the same type for all the feeders of the mounting machines. A reference number Nq for calculating the number Nfc of common component feeder sets composed of the same number of feeders to be sorted.
Is calculated based on the reference number Nq, and the number Nfc of common component feeder sets that does not generate unused feeders in all the feeders is obtained, and the same number of types of mounted components as Nfc are distributed to the common component feeder. Distribute the remaining mounted components to the feeder.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for automatically allocating mounted components to each mounting machine on a mounting line on which a plurality of mounting machines are arranged, and a component mounting method using the distributed method. It concerns the device.

[0002]

2. Description of the Related Art Conventionally, in a mounting line in which a plurality of mounting machines are arranged, when allocating the mounted components to the respective mounting machines, the NC data creator of the mounting machines performs the sorting work based on the experience so far, and then performs mounting. The tact time of each mounting machine (indicator of the time required from component supply in the feeder to mounting of components on the circuit board) is measured on the line with a stopwatch (partially implemented by simulation), and each mounting machine is measured according to the measurement result. The distribution is adjusted so that the tact balance between them can be obtained.

[0003]

As described above, conventionally,
In the electronic component mounting process, the NC data creator repeats trial and error to determine component allocation to feeders in order to balance the tact time of each mounting machine. Finally, in consideration of the results, the operator of the mounting line finally corrected the component arrangement based on his or her experience.

[0004] For this reason, there has been a problem that the work of allocating parts requires experience and time. Also, if the number of mounted components is extremely large compared to the number of mounted components, if the tact balance is obtained, the feeder (component supply means)
However, there is also a problem that the number of mounted components is limited, the use efficiency of the feeder of the mounting machine is reduced, and the number of component cutouts in the feeder having a large number of mounted components is increased.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, it is an object of the present invention to provide a feeder of each mounting machine for mounting a mounted component, to achieve a tact balance between the mounting machines, and to reduce the number of parts cut off of the feeder. It is an object of the present invention to provide a method of distributing mounted components capable of performing the method, and a component mounting apparatus using the method.

[0006]

In order to solve the above-mentioned problems, the sorting method of the present invention employs, for example, as shown in FIG.
The mounting line includes a control computer 7, which reads data including information on a board on which components are mounted from a CAD (not shown). Then, based on the read CAD data, the number Np of types of mounting components to be mounted is obtained, and the optimum number Ng of mounting devices is determined based on the number Np of types of mounting components and the maximum number Nf of mounting machines to be used.
Is determined based on the total number of feeders Nfs of the mounting machine of the optimum number Ng and the number of types Np of the mounted components, from the same number of feeders to which the same type of mounted components is distributed to all the feeders of the mounting machine of the optimum number Ng. An unused feeder is generated in all feeders by a simple calculation (trial & error method under the condition of Nfc = Nq, Nq + 1, Nq + 2,...) For calculating the common component feeder set number Nfc. Calculate the optimal number Nfc of common component feeder sets without any problem, sort the same number of mounted components as the number of sets Nfc to the common component feeders of the determined number of sets Nfc, and sort the remaining mounted components to the remaining feeders It is.

According to the method for sorting mounted components of the present invention, the following operational effects are obtained. The feeder distribution method that does not generate unused feeders is used for all feeders of the mounting machine that is being used, and feeders that use a large number of parts are divided into multiple feeders. The tact balance in the feeder can be improved, and the number of parts cut of the feeder can be reduced.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. Component mounting apparatus for applying a sorting process of the present invention is installed in the mounting line shown in FIG. 1, the component mounting apparatus, conveyance path 4 installed the mounter along S, and mounter S, each part of the mounting line And a control computer 7 for controlling and supervising the operation of the mounting device S. A feeder (parts) of the mounting machine S is mounted on the substrate 3 such as an electronic circuit board placed on the transport path 4 and transported one after another. A component such as an electronic component is mounted using the supply means). A CAD (not shown) is connected to the control computer 7, and the control computer 7 reads data including information on a board on which the component is mounted from the CAD, and, based on the read CAD data, reads the data of the mounted component according to the present invention. Perform sorting.

In this embodiment, 16 kinds of substrates 3
130 parts are mounted. The mounting machine S is T1 to T10
Has 10 feeders. According to the sorting method of the present invention, as described below, the optimal number of units used to mount 16 types and 130 parts on the mounting machine S having 10 feeders is two. Two mounting machines S1 (No. 1) and S2 (No. 2) are installed. The substrates 3 are sequentially placed on the transport path 4 and mounted on the mounting machine S1,
S2, and sequentially pass through the mounting machines S1 and S2, so that each of the mounting machines S1 and S2 has
The components 10 are mounted at predetermined positions on the board 3 using the feeders T (T1 to T10).

As shown in FIG. 2, for example, as shown in FIG.
Coordinates in the xy direction from (x1, y1) to (x
130, y130). Part 16
See FIG.
As shown in the substrate mounting table. In FIG.
For types having the same number of mounted components, the larger the total value obtained by adding the mounting position data, the higher the total value is.

[0011] The present invention, the number of mounting many types of components as a common part, by treating it with a plurality of feeders, without issuing an unused feeder to each mounter S, and tact balance between the mounting apparatus S Is to improve. In the present invention, first, the number Nfc of sets of common component feeders including the same number of feeders (common component feeders) handling common components is set using a setting algorithm.

The setting of the common component feeder set number Nfc by the setting algorithm is as follows in the case of the present embodiment. (1) Number of types of components to be mounted on one board Np: Np = 16 (2) Maximum number of feeders of one mounting machine Nf: Nf = 10 (3) Optimal number of mounting machines Ng: Ng = ( Np ÷ Nf) = 16 ÷ 10 = 1.6 → 2 (4) Available number of feeders Nfs: Nfs = Nf × Ng = 10 × 2 = 20 (5) Reference number for calculating the number Nfc of common component feeder groups Nq: Nq = (Nfs−Np) ÷ Ng = (20−16) ÷ 2 = 2 (6) The condition of Nfc = Nq, Nq + 1, Nq + 2,... Below, it is obtained by the trial & error method as follows.

(A) Number of sets of common component feeders Nfc = Nq
When = 2-The number of types of common parts to be allocated to the common parts feeder (two sets of four) Npc = Nfc = 2 types-The number of types of parts to be allocated to the remaining feeders (16 units) Npn = 16-2 = 14 types Therefore, two feeders (16-14 = 2) become unused. (B) When the number of common component feeder groups Nfc = Nq + 1 = 3-The number of types of common components Npc = Nfc = 3 types to be allocated to the common component feeders (3 sets total 6 units)-The components to be allocated to the remaining feeders (14 units) Therefore, one feeder (14-13 = 1) becomes unused. (C) When the number of common component feeder groups Nfc = Nq + 2 = 4 ・ The number of types of common components Npc = Nfc = 4 types to be allocated to the common component feeders (8 in total of 4 groups) ・ Parts allocated to the remaining feeders (12) Npn = 16-4 = 12 types Therefore, there is no unused feeder (12-12 =
0). (D) When the number of sets of common component feeders Nfc = Nq + 3 = 5 ・ The number of types of common components to be allocated to the common component feeders (5 sets in total of 10 units) Npc = Nfc = 5 types ・ The components to be allocated to the remaining feeders (10 units) Npn = 16-5 = 11 types Therefore, one feeder is not enough (10-11 =
-1).

From the above, if the number Nfc of common component feeder sets is set to 4, the maximum feeder utilization can be achieved without sending one unused feeder to the total 20 feeders T of the two mounting machines S1 and S2. Efficiently, a total of 130 parts 10 of 16 types can be mounted on the substrate 3. Further, since all the feeders are used for mounting, it is possible to improve the tact balance between the mounting machines.

Next, in the present invention, the number Nfc of sets of common component feeders is set to the number of common component feeders in descending order of mounting number.
As many components as common components are extracted as common components. If the number of components is the same, the type with the larger total value of the mounting position data (total mounting position data) is selected, and this is shared by the distribution algorithm. Allocate and distribute to the parts feeder.

In this embodiment, when four types of common parts are selected from the mounting table of FIG. 3, a (15), c (20),
h (14 pieces), r (10 pieces) (the total value of the mounting position data of f, j, m, and r is R> F, J, M). Hereinafter, two sorting methods using a simple distribution algorithm will be described as examples.

First allocation method: When the number of mounted common components increases, the influence of the mounting position decreases (the moving distance from the feeder to the mounting position on the board is averaged), so the mounting position data is used. Instead, focus only on the number of components mounted. The number of each component mounted is divided by the number 2 of the mounting machines S to be used, and the numbers are allocated to the mounting machines S1 and S2. The number of common components mounted is 15 for a, 20 for c, 14 for h, and 10 for r, so that a: 15 ÷ 2 = 7.5 → 7,8 c: 20 ÷ 2 = 10 → 10, 10 h: 14 ÷ 2 = 7 → 7, 7 r: 10 ÷ 2 = 5 → 5,5 Therefore, if the common component feeder is, for example, T7 to T10, as shown in FIG. Mounting machine S1: a component = 7, c component = 10, h component =
7, r parts = 5 Mounting machine S2: a parts = 8, c parts = 10, h parts =
The common components are mounted by distributing 7 components and r components = 5.

Second sorting method: common parts a, c,
h and r are regarded as the same parts for convenience, the number of each part is totaled, and the total value is divided into two numbers close to the value of the quotient obtained by dividing the total number by the number 2 of the mounting machines S. Each component is assigned to the mounting machines S1 and S2. The parts are 15 a, 20 c, 14 h and 10 r, so that 15 + 20 + 14 + 10 = 59 59 2 = 29.5
→ 29, 30 Therefore, as shown in FIG. 4 (b), the mounting machine S1: a component = 7, 8 (15 in total), c component = 7, 7 (14 in total), h component = 0, r parts = 0
... total = 29 Mounting machine S2: a component = 0, c component = 6, h component = 7
Pieces, 7 pieces (14 pieces in total), r parts = 10 pieces ... total = 3
Distribute and mount common components.

According to the present invention, the common components are distributed to the common component feeder by the allocation according to the distribution algorithm as described above. By distributing such common component types to the mounting machines S1 and S2, two mounting machines S
1. The mounting distance of the common component in S2, and therefore the mounting time is balanced. That is, the tact balance in the common component feeder can be obtained, and the tact balance between the mounting machines is improved accordingly.

Parts other than the remaining common parts (non-common parts)
Are distributed by the following distribution algorithm. In the present embodiment, the number of feeders used for non-common parts is 12. If the twelve types of non-common components are arranged in the order of the number of mounted components, and if the number of mounted components is the same, in the order of the total value of the mounting position data, the table becomes as shown in FIG.

Based on this table, a component type m is assigned to the first mounting machine S1, and a component type j is allocated to the second mounting machine S2. Next, f is assigned to the second mounting machine S2 and b is allocated to the first mounting machine S1. In this way, all non-common components m, j, and n are sent to non-common component feeders T1 to T6 of the mounting machines S1 and S2.
FIG. 6 shows the assignment of f, b, n, d, g, o, k, e, p, and q.

By allocating the non-common component types to the mounting machines S1 and S2 by allocating by such a distribution algorithm, the mounting distance of the non-common components in the two mounting machines S1 and S2, and hence the mounting time are balanced. That is, the tact balance in the non-common component feeder is obtained, and the tact balance between the mounting machines is improved accordingly.

According to the present invention, the number of common component feeders is set as described above, the common component type is assigned to the common component feeder, and the non-common component type is assigned to the remaining non-common component feeders. Since the distribution is performed, the tact balance between the component feeders of the mounting machines S1 and S2 and the tact balance between the non-common component feeders are improved.

According to the distribution method of the present invention, the tact balance can be improved. However, when a predetermined target value (set value) is obtained, the distribution is passed. That is, after allocating 4 types of common components and 12 types of non-common components, the total mounting position data (total value of mounting position data) of all feeders is added by each of the mounting machines S1 and S2, and the mounting machines S1 and S2 are added. If the variation of the total value of the total mounting position data between the set values is within a set value, for example, 15%, the distribution is accepted.

The variation of the sum of the total mounting position data is 15
%, The component type for the feeder is replaced, and the sum of the total mounting position data between the mounting machines S1 and S2 is calculated again by each of the mounting machines S1 and S2. Repeat the simulation comparing the fluctuation with the set value.

In this way, even if the component types are replaced a predetermined number of times and calculated again, if the sum of the total mounting position data does not reach the set value (15%), the mounting is performed. One mounting machine S (hereinafter referred to as a third machine S3) is added to the line, and the above-described method is applied to the three mounting machines, and 16 types and 130 mounted components are sorted.

That is, the number of sets of common component feeders is set using a setting algorithm, common components are extracted from the common component feeders, common components are assigned by a common component distribution algorithm, and the remaining non-common component feeders are assigned. On the other hand, non-common parts are allocated by a non-common part distribution algorithm, and four kinds of common parts and twelve kinds of non-common parts are assigned. If three mounting machines are used, mounting machines S
Since the added value of the total mounting position data among 1, S2, and S3 is reduced, it can be easily set within the set value (for example, 15%).

In the above, the common component feeder is mounted on the mounting machine S.
Although four sets of feeders T7 to T10 for S1 and S2 (total of eight sets) are used, four sets can be appropriately selected from the feeders T1 to T10 of the mounting machines S1 and S2.

This embodiment is configured as described above, and has the following operation and effect. (1) The number Nfc of sets of common component feeders that does not generate unused feeders in all feeders of an appropriate number Ng of mounting machines is obtained, and the same number of types of mounted components as the number Nfc of sets are provided in the common component feeder having the set number Nfc. (Common parts) and the remaining mounted parts (non-common parts) are distributed to the remaining feeders (non-common parts feeders), so mounting can be performed using all feeders, and the tact balance between mounting machines is improved and mounting is performed. Speed also improves. (2) Since the frequently used parts are distributed to a plurality of feeders, the number of parts cut out of the feeders is reduced.

[0030]

According to the present invention, a feeder distribution method that does not generate an unused feeder is used for all feeders of a mounting machine used in a mounting line, and a plurality of feeders having a large number of parts are used. Since the distribution algorithm that divides the feeder is used, the utilization efficiency of the feeder is high, the tact balance between the mounting machines can be improved, and the number of parts cut out of the feeder can be reduced. .

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a mounting line to which a distribution method according to the present invention is applied.

FIG. 2 is an explanatory diagram showing a mounting position on a board of a mounted component to be sorted according to an embodiment of the present invention.

FIG. 3 is a table showing a board mounting table in which the internal components of FIG. 2 are divided.

FIG. 4 is a table showing two examples of allocation methods for allocating common parts according to the embodiment of the present invention.

FIG. 5 is a table showing the internal division of non-common parts arranged in a predetermined order in the distribution of non-common parts in one embodiment of the present invention.

FIG. 6 is a table showing an assignment method for distributing non-common parts according to an embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 3 substrate 4 transport path 5 fiducial mark 7 control computer S1, S2 mounting machine T1-T10 feeder

Claims (6)

[Claims] 1. The number Np of types of mounted components to be mounted is determined from CAD data obtained by capturing information on a board on which components are mounted, and the number Np of types of mounted components and the maximum number Nf of feeders of a mounting machine to be used are determined. The optimal number of mounting machines Ng is obtained in
Based on the total number of feeders Nfs of the mounting machine of the optimum number Ng and the number of types Np of the mounted components, the same number of feeders to which the same type of mounted components are distributed to all the feeders of the mounting machine of the optimum number Ng. A reference number Nq for calculating the number Nfc of common part feeder sets consisting of: is calculated, and based on the reference number Nq, an optimum number Nfc of common part feeder sets that does not generate an unused feeder in all feeders is calculated and calculated. And distributing the same number of types of mounted components to the common component feeder having the set number of Nfc and the remaining mounted components to the remaining feeders. 2. The mounting components to be distributed to the common component feeder are determined in the order of the number of mountings on the substrate, and when the number of mountings is the same, the total value of mounting position data from the reference position of the substrate is large. 2. The method according to claim 1, wherein the order is determined in order of type. 3. The mounted component according to claim 2, wherein the mounted components allocated to the common component feeder are assigned to the common component feeder in a mode in which the number of mounted components is reduced or the number of component replacements is reduced. Sorting method. 4. The remaining mounted components allocated to the remaining feeders are allocated to the remaining feeders in such a manner that the number of mounted components is averaged.
How to sort the mounted components described. 5. When the tact balance of the feeder does not reach a preset value between the mounting machines, the number of mounting machines is increased by one, and the total number of mounting machines including the increased number of mounting machines is increased. 4. The system according to claim 1, wherein the number of common component feeder sets Nfc that does not generate unused feeders for the feeders is determined and the sorting is performed again.
Or the method for sorting mounted components described in 4. 6. A component mounting apparatus for mounting a mounted component on a substrate, wherein the mounted component is sorted based on the mounting component sorting method according to claim 1, 2, 3, 4, or 5. apparatus.