JP3249166B2 - How to sort the mounting components on the mounting line - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for distributing mounted components to a mounting line on which a large number of mounting machines are arranged.

[0002]

2. Description of the Related Art Conventionally, when distributing a mounted component to each mounting machine on a mounting line, an NC data creator of the mounting machine performs the distribution work based on the experience so far, and then stops the tact of each mounting machine on the mounting line. Measurements are made with a watch, and the distribution is adjusted according to the measurement results so that the tact balance can be obtained between the mounting machines.

[0003]

However, in the above-mentioned conventional distribution method, the distribution operation requires experience and skill, and it takes a long time. After that, it is necessary to perform the distribution adjustment manually by measuring on a mounting line. Therefore, there is a problem that more experience and time are required.

Accordingly, the present invention provides a method for allocating mounted components with high reliability by automatically allocating mounted components to each mounting machine under appropriate conditions to reduce work time and labor. That is the task.

[0005]

According to the first aspect of the present invention, a mounting line is provided.
In order to achieve the above-mentioned tasks , the method of sorting mounted components is based on the types of components that cannot be mounted or the desired mounted components.
Of various models with different mounting conditions including the type of
Mounting parts on the mounting line
A mounting component distribution method for distributing to each mounting machine,
Group each mounting machine of the mounting line with the same mounting machine.
First grouping into virtual mounting systems
And the virtual mounting system satisfies the mounting conditions.
Tact per mounting machine between each virtual mounting system
Implemented with consideration to eliminate deviations and balance
A second step of sorting the parts, and after the second step,
Distribute mounted components to each mounting machine in the virtual mounting system
And a third step.

[0006] In addition, according to the second aspect of the present invention, there is provided a component mounting system for a mounting line.
In order to achieve the above tasks,
The mounting parts commonly used for the types of printed circuit boards are
The same mounting machine for multiple types of printed circuit boards
It is something that separates.

[0007]

[0008]

[0009]

According to the above configuration of the present invention , mounting of a plurality of models
To a mounting line with a large number of mounting machines
The same type of mounting machine
Introduces the concept of a virtual mounting system that groups together
And perform the distribution process for each virtual mounting system.
Simplify the sorting process. This allows
For example, even if it is distributed to more than 10 mounting machines, 3
Simple process of sorting to virtual mounting systems
Can significantly reduce processing time.
Becomes possible.

In addition, if there is a component to be used in common by further using the setup data and the component is assigned to the same mounting machine, the setup change is required when a plurality of mounting targets are to be flown on the mounting line. It is possible to reduce the time.Also, if the score of the component order data and the optimal mounting machine data includes the factors related to the order of mounting depending on the size of the mounted component, small components should be mounted first, and large components should be mounted later. It is possible to solve the problem that the position is shifted due to the inertial force applied when the mounting object is first mounted on the mounting object and moves to mount the remaining components.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for sorting mounted components on a mounting line according to one embodiment of the present invention will be described below with reference to FIGS.

First, the overall configuration of the mounting equipment will be described with reference to FIG. The mounting machine group 1 has a plurality of mounting lines 3 in which the mounting machines 2 are arranged in a line.

A control unit 4 is connected to a control unit of each mounting machine 2 constituting each mounting line 3. The control device 4 sorts the mounted components to be mounted on each mounting machine 2 and inputs CAD data of the sorted mounted components.

For this reason, a CAD system 5 is connected to the control device 4, and the CAD data is input from the CAD system 5 to each of the printed circuit boards on which components as shown in FIG. Data is also input from a mounting machine database 6 storing data on each mounting machine 2 and a component database 7 storing data on each mounting component.

The input of the CAD data to each mounting machine 2 can be performed separately.

Next, the operation of the control device 4 for distributing the mounted components to each mounting machine 2 will be described with reference to FIGS.

First, in steps # 1 and # 2, a printed circuit board on which components are to be mounted is specified, and the CA
D data is input, and the mounting line 3 is designated.

At this time, the CAD data is also input for another printed circuit board to be flown to the specified mounting line 3.

Subsequently, in step # 3, the mounted components for each printed circuit board are checked, and a setup table as shown in Table 1 is created.

[0020]

[Table 1]

Since a change in the mounting components used in common for a plurality of specified printed circuit boards is considered,
Register in the setup consideration item.

In the item of the fixed mounting machine, when the distribution of mounted components on the first printed circuit board is determined, the determined mounting machine 2 is registered with respect to the component to be considered for setup change.

In step # 4, it is determined based on the setup table whether or not there is a mounted component that is determined by considering the setup. If so, in step # 5, the mounted component is distributed to the determined mounting machine 2 and described later. Update or create a tact balance table as shown in Table 4 below.

Here, when considering an arbitrary overhead time for each mounting machine, it is added to this tact balance table.

As a result, an arbitrary tact balance state is realized after the end of the distribution process.

In step # 6, if there are a plurality of mounting machines 2 of the same model on the mounting line 3, a virtual mounting system is created by combining them for the same model.

Therefore, the number of mounting machines 2 corresponding to the number of models is handled on the mounting line.

In step # 7, for each unconfirmed mounted component, an optimal mounting machine table is created as shown in Table 2 below, which indicates the desirability of mounting for each mounting machine 2 in terms of points.

That is, when the condition of a predetermined desirability is satisfied, the score can be created by increasing the score for the mounting machine 2 by +1.

For a mounted component that cannot be mounted by the mounting machine 2 (a mounting component having a mechanical restriction condition, etc.), a score of −1 is given to the mounting machine, and in that case, a score is obtained even if other conditions are satisfied. Do not add.

For mounting components (mounting components having user environment conditions, etc.) for which mounting components that can be mounted are uniquely determined according to the usage state of the mounting device 2 for each user, the mounting devices 2 other than the mounting device 2 that can mount are used. Give a score of -1.

In the case where other generally desirable conditions (know-how conditions) are satisfied, the score is incremented by +1 for the mounting machine 2 corresponding to each of the conditions as described above. It is possible to create an optimal mounting machine table that indicates the score of each mounting machine 2 for each component. Table 2 below shows an example.

[0033]

[Table 2]

The know-how conditions include, for example, that an axial inserter inserts a component with a smaller pitch, a radial inserter inserts a component with a lower height, a chip mount component, and the like. In the component mounting machine, it is conceivable to mount the component with the lead last and group and mount the components according to the shape of the component.

Here, as an example, a method of calculating a score under the condition that small components are mounted in a component mounting machine and large components are mounted later will be described.

As shown in FIG. 10, parameters relating to the size of the component are set on the X axis, and the line 3 of each mounting machine 2 is set on the Y axis.
The parameters relating to the relative position above are taken, a three-dimensional graph is set with the score on the Z axis, and the score is determined by the size of the mounted component and the position of the mounting machine 2.

Next, in step # 8, an interference check of the mounted components is performed. For example, in the mounting machine 2, when the nozzle for sucking the mounted component protrudes from the mounted component, it is determined whether or not it interferes with the mounted components in the vicinity at the time of mounting.

If there is an interfering mounting component, the tact balance table is updated in step # 9 by distributing to the mountable mounting machine 2 located in front of the mounting line 3 so as not to interfere.

Further, in steps # 10 to # 13, the tact balance table is updated for the mounted components that can be mounted only by the specific mounting machine 2 by distributing them to the mounting machine 2 on which they can be mounted.

From step # 14, for each mounted component that was not uniquely determined in the previous process, the product of the standard tact required for mounting the mounted component on each mounting machine 2 and the total number of uses is obtained. , A tact table as shown in Table 3 is created.

[0041]

[Table 3]

In this tact table, a difference between the maximum value and the minimum value of the mounting tact by each mounting machine 2 for each mounted component, that is, a term of the maximum tact difference MAXd is created.

Next, in step # 15, it is determined whether or not there is any unassigned mounted component. If not, the process proceeds to step # 25, where the inside of the virtual mounting system is assigned. If there is not yet distributed mounting components responsible for determining whether mounting component there Ru sorted already in the next step # 16, in the case of the first mounting component step # 17
Then, the mounted component having the largest maximum tact difference in the tact table is selected, distributed to the mounting machine 2 having the smallest tact value, and the process proceeds to step # 20.

The distributed components are updated by adding the tact to a tact balance table as shown in Table 4.

[0045]

[Table 4]

On the other hand, when there are already mounted components, steps # 20 to # 24 following step # 18 are performed.
It is determined whether there are any remaining mounted components to which the process C has not been applied, and if there are, the process proceeds to the process C. After the process C, the process returns to the step # 18, so that all the mounted components are determined. Apply process C.

If the process C has been applied to all the mounted components, the process proceeds to step # 19, where the allowable value of the highest score in the optimal mounting machine table is updated, and the process C for the remaining mounted components is applied. Step # as not
The process proceeds to 15 and the above operation is repeated.

In the process C in steps # 20 to # 24, first, in step # 20, a mounted component having a large maximum tact difference MAXd among the mounted components to which the process C is not applied is selected. As described above, a temporary tact balance table when the component is mounted using many mounters 2 is created based on the current tact balance table, and the tact balance table is used when the tact difference is minimized. It is tentatively decided to sort the parts.

[0049]

[Table 5]

Furthermore, whether or not the mounting machine 2 provisionally allocated in steps # 22 and # 23 matches the highest-scoring mounting machine in the optimum mounting machine table for the mounted component matches, or is set in step # 19 even if they do not match. It is determined whether it is within the range of the allowable value, and if it is within the range, step #
At 24, the mounted components are distributed to the determined mounting machine 2 to update the tact balance table, and thereafter, the process proceeds to step # 18. If not, step # 1
Move to 8.

In the above processing, however, for the virtual mounting system, the tact in the tact balance table and the provisional tact balance table is divided by the number of mounting machines constituting the virtual mounting system.

Next, a process for distributing the mounted components allocated to the virtual mounting system to each component mounting machine 2 will be described.

First, in step # 25, a mounted component table is prepared as shown in Table 6 below, in which the components allocated to each virtual mounting system are arranged in the order of mounting speed, in the order of the size of the mounted components, and in the order of the number of users of the mounted components. .

[0054]

[Table 6]

A tact meter of each virtual mounting system is obtained, and an average tact of one mounting machine 2 constituting each virtual mounting system is calculated. All the virtual mounting systems have been allocated to the configuration mounting machines 2, and the cassette M
If there is no problem in the AX number check, the process proceeds to step # 29, and the distribution process ends.

In step # 28 , processing is performed from the virtual mounting system near the line. The distribution of one virtual mounting system to the configuration mounting machine 2 is performed as follows.

In step # 31, the component mounting machine 2 near the line is selected as a processing target.
At 33, the components are distributed from the component mounted before the component order table to the component mounting machine 2 until the tact meter of the component mounted is greater than the average tact of one device. The same operation is performed for the mounting machine 2.

When all of the mounted components allocated to the virtual mounting system in step # 34 are allocated to the component mounting machine 2, step # is performed for the virtual mounting system.
MAX number of cassettes that can mount mounted components in 35
Check the number.

If the maximum number does not exceed the number of all the mounting machines 2, the process proceeds to step # 27, and the same operation is repeated until all the assumed mounting machines are processed. If the number of cassettes exceeds the number of MAXs, the process is started from the largest mounting machine 2 in step # 36, and the processing is repeated until there is no excess mounting machine 2.

If it is determined in step # 37 that the destination mounting machine 2 does not exceed even if the excess of the largest mounting machine 2 is moved to another one of the mounting machines 2, step # 42. In this case, the mounted components that are movable, that is, the mounted components that are in the same group as the mounting speed, and whose tactometer is selected and moved by (over number) +1 from the smallest mounted component and is selected. Is replaced with one component of the destination mounting machine 2 which is closest to the total tact of the target.

If it is not possible to move all of the excess to another component mounting machine 2, in step # 38, from the mounted components of the group that are movable and have the same mounting speed and have the smallest tactometer, It is moved to another configuration mounting machine 2 to make it within the MAX number of cassettes.

If the processing alone does not reduce the number of cassettes to within the number of cassettes MAX, the tactometer moves the smallest mounted part of the mounted parts having a continuous mounting speed to another component mounting machine 2 so that the number of cassettes is within the number of cassettes MAX.

As described above, the mounted components are mounted by the mounting machine 2 most suitable for mounting the mounted components, and the tact difference between the mounting machines 2 is small so that the tact on the entire mounting line is minimized. The mounted components can be sorted.

[0064]

According to the present invention, mounting data on a mounting object and data on a mounted component and a mounting machine are used,
An optimal mounting machine that constitutes a virtual mounting system that combines the same models in the mounting line, and calculates a score according to the appropriateness of use based on the restrictions and usage conditions of each mounting component for each mounted component Creates data and tact data that calculates the tact time when mounted on each mounting machine for each mounted component, and for the virtual mounting system, the component order in the order of mounting speed, component size, and number of employees Data is created, and with respect to the mounted parts for which the mounting machine is limited, the highest priority is given to this, and the optimum mounting machine data,
Using the tact data and component order data, it automatically determines and sorts the mounting machine that is optimal for each mounting component and that can achieve the tact balance between each mounting machine and minimize the tact. be able to. Therefore, working time and labor can be reduced with high reliability.

Further, by using the setup data, if there is a component to be used in common, the component is allocated to the same mounting machine, so that a plurality of components to be mounted on the mounting line are required for setup change. It is possible to reduce the time.Also, if the score of the component order data and the optimal mounting machine data includes the factors related to the order of mounting depending on the size of the mounted component, small components should be mounted first, and large components should be mounted later. It is necessary to solve the problem that the mounting position is shifted due to the inertia force applied when the mounting target is moved to mount the remaining components first, and the mounting is also highly reliable. it can.

[Brief description of the drawings]

FIG. 1 is an overall schematic configuration diagram of a component mounting facility to which the present invention is applied.

FIG. 2 is a first partial view of a flowchart of a mounting component sorting operation;

FIG. 3 is a second partial view of a flowchart of a mounting component distribution operation;

FIG. 4 is a third partial view of the flowchart of the mounting component sorting operation;

FIG. 5 is a fourth partial view of the flowchart of the mounting component sorting operation;

FIG. 6 is a fifth partial view of the flowchart of the mounting component sorting operation;

FIG. 7 is a sixth partial view of the flowchart of the mounting component sorting operation;

FIG. 8 is a seventh partial view of the flowchart of the mounting component sorting operation.

FIG. 9 is an eighth partial view of the flowchart of the mounting component sorting operation.

FIG. 10 is a three-dimensional graph for calculating a score in an optimal mounting machine table for an evaluation item related to the position of the mounting machine.

[Explanation of symbols]

 2 Mounting machine 3 Mounting line 4 Controller 5 CAD system 6 Mounting database 7 Parts database

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

Claims (5)

(57) [Claims] Claims: 1. A type or desirable component that cannot be mounted
Various machines with different mounting conditions including the type of mounted components
In a mounting line that includes various types of mounting machines,
With a component distribution method that distributes components to each mounting machine
There are, each mounting machine of the mounting line model of the same mounter Guru
First grouping into virtual mounting systems
And the virtual mounting system satisfies the mounting conditions and
Tact deviation between mounting systems per mounting machine
Consider the mounting components to eliminate differences and balance
A second step of distributing, and, after the second step, each mounting in the virtual mounting system
Third step and, mounted component vibration Ri divided method of mounting line with a for the machine sorts the mounted components. 2. In a second step, each mounted component is
Score on the desirability of the virtual implementation system
Priority and implement the virtual implementation system with the highest score
2. The method according to claim 1, wherein the components are distributed. 3. A component is mounted between each virtual mounting system.
To minimize the deviation of the tact per mounting machine
When distributing to the mounting system, the mounting part to be distributed
Products, the desirability of implementing the virtual mounting system
Determine if the score is within the acceptable range, and
3. The method according to claim 2, wherein the allocation to the system is determined . 4. The method according to claim 3, wherein in the third step, the mounted components are
A method according to claim 1 or 2, wherein sorting is performed from an upstream mounting machine in the order of mounting speed.
4. The method according to claim 3, wherein the component is a component. 5. A common use for a plurality of types of printed circuit boards
The mounting components that make up
2. The method according to claim 1, wherein the components are distributed to the same mounting machine .