JPH0661699A - Production schedule modifying method - Google Patents

Abstract

PURPOSE:To minimize effect of interrupted operational of a mounting machine onto production schedule by automatically supervising the operating conditions or producing conditions constantly and automatically modifying the production schedule based on the supervision results upon stoppage of an electronic component mounting machine with punctuality of delivery as a goal. CONSTITUTION:Computor units 21, 22, 23 grasp operating conditions of each machine constituting production lines C, D, E of various mounting machines, and proceeding conditions with respect to the production schedule of each line. A computor unit 24 communicating with the units 21, 22, 23 grasps production proceedings of all objective lines and operating conditions of all objective machines and then modifies or renews the production schedule. When the production schedule is modified and renewed automatically and emergency countermeasures are taken if the date of delivery can not be kept, modification of production schedule due to alteration of conditions can be automated resulting in unmanned production through mounting machines with high efficiency.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for changing a production plan when a machine is stopped for a long time due to a trouble or the like during production by an electronic component mounting machine.

[0002]

2. Description of the Related Art In recent years, efforts have been made for unmanned operation for 24 hours at a production site using an electronic component mounting machine in order to improve productivity. At the production site, a plurality of electronic component mounter line configurations are prepared so that a plurality of types of boards can be produced in parallel in consideration of the types of boards to be produced. A person who creates a production plan considers all line configurations and creates a production plan with a target delivery date. However, if the machine has to be stopped for a long time due to trouble, etc., this production plan must be changed. This change in the production plan often requires human experience and judgment, and requires a skilled person who can always make a judgment at the production site.

A conventional method of changing a production plan when a machine stops due to a trouble during the production as described above will be described below with reference to the drawings. FIG. 3 is a line configuration diagram showing a mounting machine line configuration at a production site by a conventional electronic component mounting machine. As shown in FIG. 3, the production line A includes a magazine 1 for sending out a substrate, a printer 2 for paste solder, a multi-functional mounting machine 3, a high-speed mounting machine 4, a reflow machine 5, and a mounting machine line for a magazine 6 for storing a board. This is a production line of a type having a configuration and capable of producing a board using many kinds of parts in a relatively short time, and especially for producing a board having a large number of parts to be mounted. In addition, the production line B is composed of a magazine 11 for sending out substrates, a paste solder printing machine 12, a high-speed mounting machine 13, a reflow machine 14, and a mounting machine line configuration of a magazine 15 for housing the boards, and the types of parts are limited. Is a high-speed type production line. Here, it is assumed that the number of types of parts that can be mounted on the medium speed machine is greater than that that can be mounted on the high speed machine, and that all types of parts that can be mounted on the high speed machine are included.

Here, it is assumed that two types of substrates a and b are produced using the production lines A and B shown in FIG. The board a is a board having a component structure including parts that can only be mounted by a medium speed machine, and the production line A must be used. The board b is a board having a component structure that can be produced only by a high-speed machine, and is produced on the production line B. Figure 4 shows the progress of these productions. The graph G1 in FIG. 4 shows the initial plan, and the horizontal axis shows how much time is required for the production of the production lines A and B. The vertical broken line d1 of the graph G1 shows the progress of the production plan at the time T1 when trouble occurs in the high speed machine of the production line A.

The flow of creating a production plan according to changes in the situation will be described below with reference to FIG. As shown in FIG. 5, first, when a trouble occurs in the high-speed machine on the production line A and the machine stops at step S1, step S
In 2 the operator of the production line A informs the administrator of the trouble status of the machine, and in accordance with the instruction of the administrator, the recovery work is started in step S3. Then, the manager must review the production plan of the board a and predict the time required for the restoration work in step S4 to judge whether or not the delivery date can be met. When it is determined in step S4 that the delivery date is on time, the production planning may be continued after the restoration work is completed in step S5. If it is determined in step S4 that the delivery date cannot be met, the production plan must be changed in step S6 to meet the delivery date.

Here, an example of the production plan after the trouble of the substrate a occurs is shown in the graphs G2, G3 and G4 of FIG. In FIG. 4, first, the graph G2 shows that the production line A is restored from the time T1 when the trouble occurs, and then the board a
Production is continued, and the production line B shows the time required in the case of producing and terminating the substrate b during this period. Next, in the graph G3, it is assumed that after a trouble occurs in the production line A, all the production is performed only by the multi-function machine, and in the production line B, only the production of the substrate b is continued and terminated. Further, in the graph G4, after a trouble occurs on the production line A, the production means of the board a is changed, and only the parts mounted on the multifunction machine on the production line A are manufactured on the production line A, and mounted on the high speed machine on the production line A. The installed parts are installed on the production line B
The high-speed machine Here, the production order of the production line B is that the production of the board a is performed after the production of the board b is completed. The one-dot chain line d2 of these graphs G2, G3, G4 shows the delivery date T2, and the graphs G2 and G3 show that the delivery date cannot be kept. As a result, the production plan must have the pattern of graph G4.

[0007]

However, in the above-mentioned conventional method, a considerable amount of time has to be spent collecting information and reviewing the production plan at the production site, resulting in wasting time for production. Furthermore, the delivery time will be overwhelmed. In addition, accurate judgment always requires the judgment of the responsible person or skilled person, which is a problem for unmanned operation and 24-hour operation.

The present invention solves the above-mentioned conventional problems and changes the production plan by automating the change of the production plan due to the change of the situation and realizing the unmanned production site and the highly efficient operation by the mounting machine. The purpose is to provide a method.

[0009]

In order to solve the above-mentioned problems, the production plan changing method of the present invention is to mount all the target electronic components when the situation changes in the production by a plurality of electronic component mounting machines. A first step of grasping the operating state of the machine, a second step of grasping the progress status of the production plan, and grasping all the electronic component mounting machines based on the information in the first and second steps. The third step is to automatically change and update the production plan for the purpose of achieving production by the delivery date.

[0010]

With the above construction, when the situation changes in the production, the first step of grasping the operation situation of all the target electronic component mounters and the second step of notifying the production situation of each electronic component mounter. Since it has a third process that automatically changes the production plan based on the information collected from the process, the progress status of all target production plans and the operation of all target electronic component mounting machines. The situation is always grasped and the production plan is changed automatically and efficiently according to the change of the situation.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a line configuration diagram of a production site showing a mounting machine line configuration for explaining a production plan changing method according to an embodiment of the present invention. In FIG. 1, computer units 21, 22, and 23 grasp the operating status of each machine constituting the production lines C, D, and E of various mounting machines and the progress status of the production plan of each line. Also,
The computer unit 24 is connected to the units 21, 22, and 23 by communication, and grasps the production progress of all the target lines and the operating status of all the target machines,
Change and update the production plan.

FIG. 2 is a flowchart showing the flow of the production plan change when the machine is stopped, for explaining the production plan change method of the embodiment of the present invention. In FIG. 2, step S11 is a monitoring process of operating states of all the machines which is always performed during production, and it is determined whether or not the machines have stopped.
Then, step S12 is a process for the recovery work of the machine, and step S13 is a process of determining whether the delivery date will be met if the machine continues the production after the recovery work.
Further, steps S14 to S19 are steps S13.
This is the process of changing the production plan, which is started when it is determined that the delivery date cannot be met.

Here, regarding the target machine, all machines are managed in advance by a series of numbers, and the model name of the machine is registered for this number. Furthermore, the function is registered for the model name of this machine. This function is all information necessary for making a production plan.

First, when it is determined that the machine is stopped in the operation status monitoring process in step S11, a recovery process is performed in step S12 to start an appropriate recovery depending on the reason for the stop such as error information that is the reason for this determination. In S13, it is judged whether or not the production of the machine can be restarted, if possible, how much time is required until the production is restarted, and then the production is restarted and whether or not it is in time for delivery. If only the restoration work can meet the delivery date, the process returns to step S11 to continue the production after the completion of the restoration work, and if it is determined that the deadline cannot be met in step S13,
In step S14, a process for selecting a machine necessary for producing the board is performed, and a process for checking all production plans of the machines selected in step S15 is executed. In step S16, the production plan has a margin and the delivery date is late. A process of sequentially allocating the production of the substrates whose production is currently stopped is executed from the substrate. Then, in step S17, it is determined whether the production currently stopped is completed by the delivery date if all the production planning margins of the selected machines are used. If it is determined that the determination is possible in step S17, the production plan is changed in step S19 based on the trial calculation in step S16. However, if it is determined that it is impossible in step S17, the emergency process of step S18 is executed. here,
Emergency processing requires the judgment and response of people such as the person in charge at the site. As described above, an automatic production plan changing method that reflects the operation status of each electronic component mounter can be obtained.

In this way, the process of monitoring the stoppage of the machine and judging whether or not the delivery date can be met by the reason of the stoppage,
The process of monitoring the progress against the production plan at that time,
We sort out the machines required for the production of products that are out of production,
After the production is distributed to the selected machines, it is judged whether or not the delivery time can be met by the allocation, and then the production plan is automatically changed and updated, and if it is not in time, it has an emergency process. As a result, it is possible to automate the change of the production plan due to the change of the situation, and it is possible to realize the unmanned production site and the highly efficient operation by the mounting machine.

[0016]

As described above, according to the present invention, the operating status and production status of the electronic component mounting machine are constantly monitored automatically, and based on that, the production is achieved within the delivery date when the electronic component mounting machine is stopped. The goal is to be able to automatically and efficiently change the production plan due to changes in the situation, and to minimize the impact on the production plan of stoppages that require human judgment or work such as troubles with the electronic component mounting machine. You can keep it to the limit.

[Brief description of drawings]

FIG. 1 is a line configuration diagram of a production site showing a mounting machine line configuration for explaining a production plan changing method according to an embodiment of the present invention.

FIG. 2 is a flowchart showing the flow of production plan change at the time of machine stop for explaining the production plan change method of one embodiment of the present invention.

FIG. 3 is a line configuration diagram showing a mounting machine line configuration at a production site using a conventional electronic component mounting machine.

4 is a graph showing the progress of the production plan in the mounting machine line configuration of FIG. 3, where G1 is an example of the initial production plan,
G2 to G4 are examples of production planning after trouble occurs

FIG. 5 is a flowchart showing a flow of production plan change when the machine is stopped for explaining a conventional production plan change method.

[Explanation of symbols]

 21, 22, 23, 24 Computer unit C, D, E production line

Claims (1)

[Claims] 1. A first step of grasping the operating states of all of the target electronic component mounters when the situation changes in the production by a plurality of electronic component mounters, and the progress of the production plan. The second step of performing the above, and grasping all the electronic component mounting machines based on the information in the first and second steps, and automatically changing and updating the production plan for the purpose of achieving production by the delivery date. Production plan changing method having the steps of.