JPH10229293A - Part mounting program forming method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remarkably improve equipment and production lines in operating efficiency and throughput by a method wherein an evaluation of the process time balance for a unit board is made, and furthermore the extraction of a mountable board and a mounting priority are computed basing on a production program and stock data. SOLUTION: A part mounting program is made through such a manner that the extraction of a mountable board and a mounting priority are computed (5), a board where parts are mounted is tentatively determined, and an operating time and a lead time are simulated (6). Furthermore, an operation capability and a simulation result are judged (7), a part mounting program is determined (8), a part preparation method is indicated (9), and a part mounting operation is indicated (10). As to the computation of a mounting priority and the judgment of operation feasibility, data controlled and stored in a data base storage device are extracted and computed through a mounting program forming device. For instance, an operation priority is determined basing on an operation NO, an operation start date, an operation finish date, and a process route.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preparing a component mounting plan for a mounting machine process for mounting electronic components and a method for collecting performance information in the mounting machine process for mounting electronic components.

[0002]

2. Description of the Related Art Conventionally, a mounting machine process in mounting an electronic component will be described with reference to the drawings. FIG. 20 shows a flowchart of a conventional mounting machine process. In FIG. 20, 1 is an automatic component allocation / mounting order determination / tact simulation process, 2 is an automatic component allocation process for re-balancing the tact, and 3 is a component arrangement and mounting position based on the previously allocated component mounting order rule file. The difference mounting order determining step 4 for determining the difference mounting order is a difference tact simulation step of adding the tact of the components assigned this time to the previous tact of each facility.

[0003] In one step, a mounting machine is used to select a component to be mounted, then, for each mounting machine, which component is to be mounted in order is determined, and a time required for mounting is calculated for each mounting machine.

[0004] In the second step, the components to be mounted are allocated again for each mounting machine based on the variation in the mounting time for each mounting machine calculated when the components were allocated to each mounting machine last time.

In the third step, the previously calculated mounting position is determined based on the component arrangement of the mounting machine where the component is to be set and the mounting position where the component is to be mounted, in accordance with the previously determined mounting order rule for each component. Calculate the difference from the order.

In step 4, a difference from the previously calculated tact is calculated based on the result calculated in step 3, and added to the previously calculated tact to calculate a redistributed tact.

In the above method, since the tact balance of each mounting machine is evaluated to be the best for each board, when each mounting machine has the same features in a production workplace or a line that performs mass production of small varieties. Is very effective.

[0008] However, components that do not require much mounting accuracy are mounted using a mounting machine with low accuracy but high mounting speed, and components that require mounting accuracy are mounted with low mounting speed but high accuracy. Since the mounting is performed using a machine, the characteristics of each mounting machine are generally different.

[0009] Since the features are different for each mounting machine, depending on the type of the board, the number of components to be mounted on a part of the mounting machine increases, and the tact balance for each mounting machine is not uniform.

[0010]

In such a conventional method alone, in the mounting machine process of mounting electronic components, when a plurality of production lines and mounting machines have different characteristics and various components are mounted on various substrates. In this case, the load is concentrated on a part of the line / mounting machine, the tact becomes uneven, and the mounting machine stops. In other words, the tact is short on the production board,
The production efficiency of a line / mounting machine that is likely to be suspended changes when the line / mounting machine that is suspended on a substrate to be produced next is operated.

Further, in order to mount components on a board,
Different setups of the mounting machine are required depending on the substrate. That is, when the board is similar to the board produced before the production board, the setup is small, and when the board is not similar, many setups are required.

The operating time and throughput of the line / mounting machine are not always the best, depending on the type of board to be produced, the number of boards, and the production order.
In addition, if the production plan considered to be the best is made and the results are collected and feedback is not provided, there will be a gap between the planned and actual results due to the failure of the mounting machine or the incompleteness of the planned work, and the effect as planned The problem that cannot be obtained occurs.

[0013]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an evaluation of a tact balance for each board, a production plan for producing a product, and an inventory information of electronic parts to be mounted. A process of extracting possible boards and calculating the priority of mounting, a process of assuming a board on which components are to be mounted, a process of simulating a working time and a lead time according to a mounting order of the boards, and a work capability and a simulation result. Determining the component mounting plan, giving a work instruction, changing the component type / number of components to be passed to the component mounting work location based on the component mounting plan, and giving an instruction. A component mounting plan in the electronic component mounting process, which consists of collecting the progress of production based on the original work and changing the method of calculating setup and work time. It is possible to provide a formed way.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a flowchart of a component mounting plan creation method according to the present embodiment. FIG.
Is a step of extracting a mountable board and calculating a mounting priority. Reference numeral 6 denotes a step of simulating a work time and a lead time assuming a board on which a component mounting work is performed. Step 7 is a step of determining the work capacity and the simulation result. Reference numeral 8 denotes a step of determining a component mounting plan. Reference numeral 9 denotes a step of instructing a method for preparing parts.
Reference numeral 10 denotes a step of instructing a component mounting operation.

In the following, the same operation and effect will be denoted by the same reference numeral, and detailed description thereof will be omitted. FIG. 2 is a schematic diagram of a system configuration for implementing the present invention. In FIG. 2, 11 is a database storage device, 12 is a mounting machine control device,
13 is a mounting plan creation device, 14 is a component management device, 15 is a component preparation work instruction device, and 16 is a mounting machine. FIG. 3 is a schematic diagram showing overall production plan information for producing a product. In FIG. 3, reference numeral 17 denotes a work number, 18 denotes a work start date, 19 denotes a work completion date, 20 denotes a board name, 21 denotes a production number, and 22 denotes a process route. FIG. 4 is a schematic diagram showing mounting work information for each board name. In FIG. 4, 23 is the NC data name, 24 is the number of parts used, 25 is the part name, 26 is the quantity, 27 is the work time per process, and 28 is the process name. FIG. 5 is a schematic diagram showing information for setting a component for each component name in the mounting machine.
In FIG. 5, 29 is the packing style, 30 is the number of set places used by equipment and parts, and 31 is the equipment name. FIG. 6 is a schematic diagram showing stock information for each part name. In FIG. 6, reference numeral 32 denotes warehouse stock, and 33 denotes site stock. FIG. 7 is a schematic diagram showing basic unit information of work time determined by a part. FIG.
In the figure, 34 is the part packing style / the number of work hours by type, 35 is the type of part packing, and 36 is the type unit. FIG. 8 is a schematic diagram showing lead time information for each process route. In FIG. 8, 37 is the total time, and 38 is the lead time for each process. FIG. 9 is a schematic diagram showing information that is set in the creation of a plan from the viewpoint of work efficiency, which is a variable element. In FIG. 9, 39 is the number of workers, 40 is the upper limit of the working time, 41 is the average of the working time,
Reference numeral 42 denotes work capacity by process. FIG. 10 is a schematic diagram showing information on the amount of parts that can be set for each equipment. In FIG. 10, reference numeral 43 denotes a facility name, and reference numeral 44 denotes the number of parts set locations by packing style. FIG. 11 is a schematic diagram showing mounting time basic unit information that changes for each equipment and each component. In FIG. 11, reference numeral 45 denotes the number of working hours for each part packaging. FIG. 12 is a schematic diagram showing work information for each facility. In FIG. 12, 46
Is a unit of setup time. FIG. 13 is a schematic diagram showing the results of prioritizing the work for each board name and determining whether the work is possible. In FIG. 13, 47 is a priority, and 48 is work permission / inhibition. FIG. 14 is a schematic diagram showing component preparation information before mounting. In FIG. 14, reference numeral 49 denotes a work time, and 50 denotes a work component for each board. FIG. 15 is a schematic diagram showing the operation time for each mounting equipment / substrate name. In FIG. 15, reference numeral 51 denotes a work time / lead time, and 52 denotes a work time per facility. FIG. 16 is a schematic diagram showing work schedules for each substrate name and each process. Figure
In 16, 53 is a work schedule for each process.

Hereinafter, the above embodiment will be described in detail with reference to the drawings. FIG. 17 shows a flowchart of Step 5 for extracting a mountable board and calculating a mounting priority.

FIG. 2 shows the calculation of priority and the determination of work availability.
The information stored and managed by the database storage device 11 shown in FIG.

The priority of the work is determined from the work number 17, the work start date 18, the work completion date 19, and the process route 22 shown in FIG.
(Work priority ordering step 54 in order of work start date in FIG. 17) As an example of the condition setting, first, the work start date 18 is earlier, the work completion date 19 is earlier, and the process route 22 is longer. In addition, it is assumed that the process is performed from a process route that passes through a process in which a problem such as a work delay is likely to occur during the work progress.

As described above, the conditions for setting the priorities are set in advance, and the prioritization can be automatically set by searching for all the work numbers 17 to be scheduled in accordance with the set conditions.

Further, the priorities may be suddenly changed due to items other than the above-mentioned setting conditions, so that the prioritization is set to be changeable.

If the types of the work numbers 17 to be scheduled are small even if the automatic prioritization is not performed as described above, the work start date 18, the work completion date 19, the process The priority is set based on conditions such as the route 22.

An example of setting the priority is shown as priority 47 in FIG.

Next, the following steps for calculating and judging the following steps are performed for all the operation numbers 17 in the order of priority 47 in FIG.
(Work target board presence / absence determination step 55 in FIG. 17) The work number 17, the board name 20, the production number 21, and the number of parts used 24, the part name 25, and the quantity 26 shown in FIG. calculate. (Step 56 of calculating the number of parts based on the board name and the number of products produced in FIG. 17) The board name 20 in FIG. 3 and the board name 20 in FIG. The number of used parts 24 with the name 20 is extracted.

The extraction is performed by the part name 25 shown in FIG. 4 and the part name 25 shown in FIG.
Is the quantity 26 in FIG.

The quantity 26 shown in FIG.
Is the number of parts used in the operation number 17.

FIG. 6 shows the number of parts to be used for each work number 17 and part name 25 calculated in the work target board presence / absence determination step 55 in FIG.
The excess / deficiency number of parts is calculated from the part name 25, the warehouse stock 32, and the site stock 33 shown in FIG. (Comparison with stock number in FIG. 17 and component excess / deficiency calculation step 57) For each operation number 17 calculated in the work target board presence / absence determination step 55 in FIG. 17, the component name 25 is compared with the component name 25 in FIG. The total of the component quantity calculated in the work target board presence / absence determination step 17 and the warehouse stock 32 and the site stock 33 is compared. (Operation start availability determination step 58) The comparison is performed on all parts having the operation number of the comparison target.

When the mounting plan is created and the operation is started, the inventory number in the warehouse is reduced by the number of components used for mounting, and the inventory number at the site is increased by the component preparation operation performed for the mounting operation.

Thereafter, the number of stocks at the site is reduced by the mounting work.

The above-described flow of a series of mounted components is managed by the component management device 14 shown in FIG.

From the comparison between the stock and the number of parts to be used, if the stock number of all the part names is larger than the used number in the comparison target work number 17, it is determined that the work can be started.

The result of the determination as to whether or not work can be started is shown as work determination 48 in FIG.

When it is determined from the work availability determination result that work is possible, the work is to be performed and the work number 17 to be determined is determined.
Since the components used in the operation No. 17 are to be mounted, they cannot be used in the operation number 17 to be determined after the operation number 17 to be determined.

That is, this is the same as the reduction in the number of parts in stock.

For the above reason, the stock of the parts used in the operation number 17 to be determined is subtracted. (Step of subtracting inventory number 59 in FIG. 17) Here, since the component inventory number was subtracted in order to determine the names of workable boards in order of priority, work on inventory is possible. In some cases, all of the mounting work capacities are not operable, so the actual stock quantity is not equivalent to the calculated stock quantity.

Therefore, the stock quantity is determined at the time when the work number to be worked on is determined.

Further, as shown in the priority "47 delay notice" of FIG. 13, when the work cannot be started even though the work start date 18 is close, measures for preventing the work delay are displayed by the above display. Can also be used to take. (Schedule delay situation creation step 60 in FIG. 17) In order to use for the above-mentioned countermeasures, a database is prepared in advance as to what kind of message is to be displayed when there is a difference between the creation date of the schedule plan and the work start date. Keep it.

FIG. 18 is a schematic diagram showing the process 6 for simulating the working time / lead time and the process 7 for judging the work capability ≧ the simulation result in FIG.

Some work numbers 17 are extracted from the priority 47 in FIG. 13 and a work target board is assumed. (Work target board assumption process 61 in FIG. 18) At this time, the number of work numbers 17 to be extracted for the target work is the number of work numbers 17 selected when the mounting plan was previously determined, or
By using a statistical method such as selecting an average numerical value from the number of results up to the previous time, it is possible to reduce the time required to create a mounting work plan.

The work time is calculated based on the board name 20, the number of products 21 and the work time 27 for each process in FIG.

One method of calculating the work time is to set the work time for each process 27 in FIG. 4, which is the standard work time, and to calculate the work time for each process by multiplying the production number 21 in FIG. (Step / substrate-specific work time calculation step 63 in FIG. 18) As a method for calculating the work time in detail and performing more detailed work management, the following method is conceivable.

FIG. 19 is a schematic diagram showing the process / substrate-specific work time calculating step 63 of FIG.

Assuming the work target substrate 61 and the work order assumption 62 in FIG.
Based on this, the total used component names of the work for which the mounting plan is to be created are calculated from the component names 25 in FIG. (Step 73 for calculating the total used component type of the work for which the mounting plan is to be created)
• Calculate the number of places to be used when setting equipment from the number of places to be used for each part. (Step 74 of calculating the number of used places at the time of equipment setting) The calculation result of the above step 74 is compared with the number of set places of parts 44 by packing type in FIG. Can prepare a component irrespective of a work number and a board name, and can perform a setup work for starting a mounting work. (Instruction step 77 for preparing parts irrespective of the board name) If the parts cannot be set at once in step 75 (determination result in step 75), based on the work order assumption result 62,
It is determined whether or not there is a component name to be determined in the work target board before the determination target work order. (Step 76 for determining whether there is a common part in the previous work order in FIG. 19) From the determination result in the above step 76, if there is a common part, it is instructed to work with the board name of the work number of the previous work order I do.
(Instruction step 78 for preparing parts in the work before FIG. 19) A schematic diagram showing the result of the above-described steps is shown in FIG.
It is.

As shown in FIG. 14, the target board name AAA
And the components 112 common to the AAB perform the work assuming that there is a work component 20 collectively in the board name AAA whose work order is earlier.

Taking the process 1 in the embodiment, that is, the component preparation work as an example, in order to prepare the parts, first, there is a search for the parts to be worked, and then the required quantity is picked up. Therefore, the above-mentioned arrangement reduces the amount of work for searching for the former, thereby shortening the work.

FIG. 7 shows an example of the required time of the type unit 36 as the work time for searching for parts in the above-mentioned work, and the work time for each package 35 as the pick-up work time.

Here, the work time for searching is generally longer than the work time for searching for parts and the work time for picking up parts.

That is, the effect of reducing work time by grouping works by component name is great.

Next, the operation time is calculated. (FIG. 19 work time calculation step 79) The work time includes a time for mounting the mounted component and a preparation time for setting the component to the mounting equipment for mounting.

As shown in FIG. 11, the number of working hours by component packaging style 45, the mounting time usually differs depending on the component shape as typified by the packaging style of the component (packing state of the component).

In order to minimize the mounting time, it is preferable to use the method described in the prior art and use the order of mounting and component distribution.

The preparation time is calculated by retrieving the board name 20 from the work number 17 in FIG. 13 and retrieving the part name from the board name 20 in FIG.
25, and from the component name 25 in FIG. 5 and the name of the mounting equipment as a result of the component automatic re-distribution step 2 in FIG. 20, a setup work time 46 in FIG. 12 is obtained, and a total work time of the search results is obtained.
Calculate the working time. (FIG. 19 work time calculation step 79) The calculation step 79 is compared with the work capacity 42 for each step in FIG. 9 to determine whether work is possible. (Step 64 for determining whether the operation time is within the allowable value in FIG. 18) The calculation targets of steps 66 to 70 described below are set. (Figure 18
Calculation target substrate setting step 65) It is determined whether all of the calculation target substrates have been examined in steps 67 to 70 described below. (Step 66 for Determining the Presence or Absence of a Target Substrate in FIG. 18) The calculation target in steps 68 to 70 described below is set. (Figure 18
The calculation target process setting step 67) is performed by retrieving the process path 22 in FIG. 3 from the target substrate name and further setting the process path 22 in FIG. 3 to the process name 28 in the process-specific lead time 38 in FIG. Search for.

It is determined whether all of the substrates to be calculated have been examined in steps 69 to 70 described below. (Step 68 for determining the presence or absence of a target board in FIG. 18) The result of the work time calculation step 79 in FIG. 19 and the lead time 38 for each step in FIG. 8 are added to the time when the board name 20 (work number 17) to be calculated can work. The time after the addition is the time at which work can be started in the next work process 25. (Work time setting process in Fig. 18
70) Here, the process-specific lead time 38 is a time other than the work of actually mounting components on the target board, and other than the actual work time spent transporting the target board between processes. Time.

By the above steps, the working time 49 in FIG.
Work time for each process, like work time 51 / lead time, and work time 51 / lead time, work schedule for each process in Fig. 16.
Create 53.

Further, based on the results calculated in the steps 62 to 70, it is determined whether or not the lead time is in the optimal work order. (Figure
Step 71 of determining whether the lead time is optimal 18) Even if the result of the determination is the optimal work order, the target time of the mounting plan preparation, that is, the period in which the work can be completed in one day if the mounting plan preparation is performed on a daily basis. It is determined whether the work can be completed. (Step 7 for determining whether the lead time in FIG. 18 is within the allowable value)
2) When the determination result of step 72 in FIG. 18 is good, the work number to be worked on is determined for the first time. (Mounting plan determination step 8 in FIG. 1) Further, how to sort the components from the board-specific work components 50 in FIG. 14 is instructed by the component preparation work instructing device 15 in FIG. (Preparation method instructing step 9 in FIG. 1) The mounting operation method is instructed by the mounting machine control device 12 in FIG. 2 for the board name 20, the work time 52 for each equipment, and the equipment name 43 in FIG.
(Mounting work instruction step 10 in FIG. 1) The actual required work time is calculated by automatically recording the time of the control and preparation work of the mounting machine performed by the mounting machine control device 12 of FIG. 2 by the control device. Then, the difference between the actual work time and the work time based on the calculation result is obtained and self-corrected.

[0055]

As described above, according to the present invention, in a process relating to a mounting machine for mounting electronic components, there is a difference in capacity between a plurality of production lines and production facilities, and facilities and productions used by a variety of board types are used. If the tact balance for each board type is not constant because the lines are different, in addition to the conventional tact balance evaluation for each board name, the operation rate and throughput of equipment and production lines are evaluated by performing evaluations on the boards to be produced. This has the effect that it can be greatly improved as compared with the related art.

[Brief description of the drawings]

FIG. 1 is a flowchart of a component mounting plan creation method according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of a system configuration according to the present embodiment.

FIG. 3 is a schematic diagram illustrating overall production plan information for producing a product according to the present embodiment.

FIG. 4 is a schematic diagram illustrating mounting work information for each board name according to the present embodiment.

FIG. 5 is a schematic diagram showing information for setting a component for each component name in a mounting machine according to the present embodiment.

FIG. 6 is a schematic diagram showing stock information for each part name according to the present embodiment.

FIG. 7 is a schematic diagram showing basic unit information of work time determined by parts according to the present embodiment.

FIG. 8 is a schematic diagram illustrating lead time information for each process route according to the present embodiment.

FIG. 9 is a schematic diagram showing information to be set in the preparation of a plan from the viewpoint of work efficiency, which is a variable element according to the present embodiment.

FIG. 10 is a schematic diagram showing information on the amount of parts that can be set for each facility according to the present embodiment.

FIG. 11 is a schematic diagram illustrating mounting unit time information for each component that changes for each facility and each component according to the present embodiment.

FIG. 12 is a schematic diagram illustrating work information for each facility according to the present embodiment.

FIG. 13 is a schematic diagram illustrating a result of prioritizing work according to a board name and determining whether work is possible according to the present embodiment.

FIG. 14 is a schematic diagram illustrating component preparation information before mounting according to the present embodiment.

FIG. 15 is a schematic diagram showing work time for each mounting equipment and board name according to the present embodiment.

FIG. 16 is a schematic diagram showing work schedules for each substrate name and each process according to the present embodiment.

FIG. 17 is a flowchart illustrating a process of extracting a workable board according to the present embodiment.

FIG. 18 is a flowchart illustrating a process of calculating a work time according to the present embodiment.

FIG. 19 is a flowchart illustrating a process of calculating a work time according to the present embodiment.

FIG. 20 is a flowchart showing a conventional process for calculating a mounting operation time.

[Explanation of symbols]

1. Automatic parts allocation / mounting order determination / tact simulation process 2. Automatic parts allocation process
3 ... Difference mounting order determination step 4 ... Difference tact simulation step 5 ... Extraction of a mountable board and calculation of the mounting priority 6 ... Work time and lead time assuming a board for component mounting work A step of performing a simulation, 7: a step of determining a work capability and a simulation result, 8: a step of determining a component mounting plan, 9: a step of instructing a component preparation method, 10: a step of instructing a component mounting operation, 11 ... Database storage device, 12 ... Mounting machine control device, 13 ... Mounting plan creation device, 14 ... Component management device, 15 ... Component preparation work instruction device, 16 ...
Mounting machine, 17: work number, 18: work start date, 19: work completion date, 20: board name,
21: Production quantity, 22: Process route, 23: NC data name, 24: Number of parts used, 25: Part name, 26: Quantity,
27: Working time by process, 28: Process name, 29: Packing style, 30: Number of set places used by equipment / parts, 31: Equipment name, 32: Warehouse inventory,
33: On-site inventory, 34: Number of working hours per part packing / type, 35: Type of part packing, 36: Type unit, 37: Total time, 38: Lead time by process, 39: Number of workers, 40: Work Upper limit of time, 41: average working time, 42: working capacity by process, 43: equipment name, 44: number of parts set locations by packing type, 45: number of working hours by component packing type, 46 ...
Basic unit of setup time, 47: Priority, 48: Workability, 49: Work time, 50: Work parts by board, 51: Work time / lead time, 52
... Work time by equipment, 53 ... Work schedule by process.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI G05B 15/02 G05B 15/02 Z

Claims (4)

[Claims] An access means for accessing a production plan database for storing an assembly plan of a board to be produced and a production plan database for each board, a board database for storing characteristics of components mounted on the board, and various other means. An access unit for accessing a board database for each component, a component database storing characteristics of various components that affect the mounting of components, an access unit for accessing a component database for each component, and a component for each facility. A work database that stores the characteristics of the work required for mounting and an access unit that accesses the work database for each component, a progress status database and various components that store the work status that affects the mounting operation of the equipment Access to the progress status database for each and each board Access means and read out data from each database to determine the board mounting order and mounting equipment so that the work time required to mount parts based on the production plan and the lead time of board assembly are minimized. A featured component mounting plan creation method. 2. A board to be produced is changed based on the mounting plan and the assembly plan of the board to be produced according to claim 1, a board database and a parts database according to claim 1, and a missing part database storing the presence or absence of a component to be mounted. 2. The method for preparing a component mounting plan according to claim 1, wherein: 3. A component type and the number of components to be delivered to a component mounting work site based on a mounting plan in which the mounting order and mounting equipment of the substrate according to claim 1 are determined, and a board database and a component database according to claim 1. Claim 1 characterized by the following:
How to create a component mounting plan. 4. A progress information database storing the progress status of production by notifying start and end of work for each facility when production is performed based on the mounting plan according to claim 1, and a work database according to claim 1. 2. The component mounting plan creation method according to claim 1, wherein the difference between the mounting plan and the actual work time is reduced by updating the component mounting plan at any time.