JP2003131723A - Parts lot management system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a parts lot management system which can immediately provide parts lot information with a high degree of reliability without incurring increase in the cost. SOLUTION: The parts lot management system to display lot history information for the parts thrown in each processor in a production line is provided with: a discharge information collection means which collects a discharge signal of processed materials at each processor, a parts lot history collection means which collects lot information of thrown in parts at each processor, a number of buffer input means which inputs number of buffers between each of processors, a parts lot specification means which specifies a parts lot of a product or a work in process based on the discharge information, parts lot history, and a number of buffers, and a display means which displays the parts lot history information retrieved by the parts lot specifications means.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a production line composed of sub-lines and a main line of several units such as cartridges, for example, which may cause problems in product quality after production. The present invention relates to a component lot management system for displaying input component lot history information, which is important in examining defect measures. 2. Description of the Related Art Conventionally, as a component lot management system in such a production line, first, a component lot will be described. Various components are assembled in a production line. There are many parts, such as lids, rubber roller parts, and gear parts, that have an effect on quality due to their precision. In addition, these parts are manufactured by several manufacturers, and if the same part has a different manufacturing apparatus, the accuracy of the parts may differ. [0003] Therefore, usually, parts are divided into lots so as to be distinguished according to the production date and the production apparatus, and delivered with sheets of lot numbers. The operator
Only the parts lots input at each station are entered in a dedicated sheet in chronological order or entered into a personal computer and managed. In addition, when the product is completed by the production line, the product is laser-engraved with a number that indicates the date and time of release in the final process, a shipping lot No. sheet is attached, and when the product is completed It is a mechanism to understand. [0004] Therefore, the quality manager predicts the number of in-process products and the lead time of the production line based on the experience and feeling so far, and reversely calculates the production date and time of the laser engraving and checks the form of the parts lot. Predict lots of each part and examine quality issues. Further, it is considered that a bar code label is affixed to a product body or the like, and a component lot correspondence by an automatic recognition method using a bar code reader is expected to be introduced in the future. It is also necessary to devise the size, material, and position of the label. [0006] However, in the above conventional example, when a defect caused by a member occurs due to a market complaint, the number of products in process is determined by the date and time of discharge of the product and the past experience and feeling. The lead time is predicted, the input date and time of each component is predicted, and the component lot near the input date and time is identified from the form. In this case, the range in which the part lot is to be expected must be set large, and the time required for the lot will be enormous. In addition, the situation of the production line of the product is not known at all, and information on, for example, a case where the apparatus is stopped for a long time is unknown. [0007] Further, if the form of the component lot is different,
There are many cases where there are not only one kind of parts to be washed out but also many parts. If you want to see the chronological relationship between lots of A parts and B parts at the same time, you need to compare each form and save a lot of trouble. There is also the problem of cost. SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a parts lot management system capable of immediately providing reliable parts lot information without increasing costs. To provide. In order to achieve the above object, the present invention relates to a parts lot management system for displaying lot history information of parts inputted by each processing apparatus of a production line. Discharge information collecting means for collecting a discharge signal of an object to be processed, and component lot history collecting means for collecting lot information of input parts in each processing device,
Buffer number input means for inputting the number of buffers between the processing devices; part information specifying part lots of products and work-in-progress from the discharge information, part lot history, and number of buffers; Display means for displaying the retrieved component lot history information. Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a configuration diagram of a parts lot management system according to the present invention. In the parts lot management system according to the present embodiment, in a production line composed of fifteen processing units, parts lots inputted by five of the processing units are managed. In this production line, when a problem relating to any part occurs after the shipment of the line, the discharge date and time stamped on the product body is input, and the part lot is predicted from the part lot history information and displayed on the CRT. In FIG. 1, reference numeral 10 denotes a computer for managing component lots, 11 denotes an input / output interface, 12 denotes input means such as a mouse and a keyboard, and 13 denotes display means such as a CRT. 14-1 is the first processing unit of the production line, which is composed of 15 units. Processing device 1
4-1 to 14-15 are connected to the computer 10 by I / O signal lines. With this I / O, a discharge signal is output each time a workpiece is discharged from each processing device. Reference numeral 15 denotes a CPU, and 16 denotes a data storage unit. 1 is emission information control means for collecting emission signals output from each processing device and writing the average emission interval at regular intervals from the collected signals in the data storage unit 16;
2 collects the component lot information input from the input means 12 by an operator or the like when the number of components to be input is reduced in the five processing apparatuses for managing the component lot and the component lot is changed, and stores the data. This is a component lot history information means to be written into the unit 16. 3 is a part lot specifying means for specifying a part lot which is likely to be used for the part based on the data and the data stored in the data storage unit 16 when the date and time of discharge of a product whose part lot history information is to be known is input. It is. FIG. 2 is a view showing an example of an input screen for inputting lot information of parts to be put into each apparatus. As for the input part "container A", the case where the part lot number becomes "A05-12-02" at the input time "97/12/01 10:15" is input.
In the present embodiment, parts management is performed in five processing apparatuses. The names of the parts are five parts: container A, lid A, sealing material, container B, and gear A. Data input by the operator from a keyboard or the like is registered in the data storage unit 16 as in a file shown in FIG. FIG. 4 shows an example of a buffer number input screen. In the screen example, the remaining numbers can be input by the screen scroll function in the display of the device numbers 1 to 10.
The device 1 inputs the number of buffers up to the previous device as “0” because it is the head, and the device 2 inputs “3” because it is the number of buffers up to the device 1 and device 2. FIG. 5 shows an example of the input buffer number data registered in the data storage unit 16. FIG. 6 is a diagram showing an example of the emission information data of each device collected by the emission information collecting means. As the data, the emission information collecting unit acquires the emission signal output from each processing device, and in this embodiment, the average discharging interval (= the average value to be discharged to the next processing device) in units of one hour. Is calculated. As an example, device 1 has 9
From 7/12/01 09:00 to 97/12/01, the average discharge interval for one hour is “2.4 minutes”.
The time indicates "1.5 minutes". FIG. 7 shows an example of an input / output screen of the parts lot management system. As an input, a discharge date of a product whose part lot number is to be specified is entered. As the output, a part lot number corresponding to the product is displayed. Hereinafter, this identification method will be described in detail. FIG. 8 shows a part lot name managed in this embodiment and its station. It is composed of 15 stations, and each station is connected by a compare also serving as a buffer unit. The five stations that manage the component lots to be input are station Nos.
1 and “Container A”, station No. 3, "Lid A",
Station No. 5 "Seal material", station N
o. 6, “Container B”, station No. 7 is “gear A”. Parts are also loaded at other stations, but there is no particular control in the screw tightening process or inspection process. And when it is completed at the last station,
The date and time of completion are stamped on the body. FIG. 9 shows a flow of a method for specifying a component lot. In the following description of the flow, the station N
o. Regarding the first “container A”, the specification of the input component lot will be described. First, in step S10, a discharge time T1 of a product to be specified is input. For example, "97/12/01
09:15 "and press the search button. In the present embodiment, since the discharge information is sampled every hour, the input discharge time T1 is “97/12/100”.
9:00 "is used. In step S20, the station number at which the average discharge interval at the time T1 input from the discharge information table is the maximum, and the average discharge interval (= A1) are obtained. In the example, a station number = 5 gives a maximum average ejection interval = 2.6 minutes. Next, in step S30, the magnitude relationship between the obtained station number and the station number of the part to be specified is determined. In the present embodiment, since the station number of the component to be specified is 1, step S40
Proceed to. Next, in step S40, the determined station number (= 5) and the maximum average discharge interval (= 2.6)
Minute) and the number of buffers, first, the total number of the number of stations and the number of buffers from station number 5 to station number 1 where ejection is a bottleneck step, that is, the number of stays, is calculated. In the present embodiment, the number of stations is 5 from 1 to 5, and the total number of buffers is 14 (= 3 + 3 + 3 + 5) from the data of the number of buffers, and a total of 19 (= 5 + 14) is obtained. Step S
At 50, the number of stays after the neck process is determined. Since the station numbers are from 6 to 15, ten are obtained as they are. In the next step S60, a lead time is calculated. The lead time is a value L (29 × 2.6 minutes = 75.75) obtained by multiplying the total value 29 (= 19 + 10) of the numbers of stays determined in steps S40 and S50 by the maximum average discharge interval determined in step 20. 4 minutes). Next, as step S70, the charging date / time T2 of the container A is obtained from the formula of T1-L. The product discharge date and time T1 is "97/12/01 09:15" and L
Is 75.4 minutes. Therefore, T2 is "97/12/0
18:00 ". Next, in step S80, step S70
The input component lot number is specified from T2 and the component lot history table obtained in step (1). T2> = M
The container A input time, which is ax (container A input time), is obtained from the parts lot history table to be “97/12/1
07:58 ”is obtained and the part lot number“ A05-1 ”
1-04 ". Therefore, in the part lot numbers input after this, “97/12/01 09: 1 of T1”
The part lot numbers input up to "5" can be specified, and the input time and the component lot are displayed on the screen in order of time in step S90. If the condition in step S30 is not satisfied, the number of stations from the station number of the part to be specified to the last station is set to 2 in step S100, and the process continues to step S60. Similarly, other management parts such as the lid A can be obtained in a specific flow. In the example of the output screen in FIG. 7 of the present embodiment, since the container A is the first station of the present line, the parts managed in the subsequent stations are also “97/12/01 07:58”. To the lot number from “97/12/01 09:15” can be referenced and displayed by comparing the times from the parts lot history information table. Therefore, in order to make the output screen easier to see, the first number of the same part whose lot is changed is displayed in a different color. The screen also displays lot number data before “97/12/01 07:58” and after “97/12/01 09:15” in order to have a specific range of width. As is apparent from the above description, according to the present invention, in the parts lot management system for displaying the lot history information of the parts input by each processing unit of the production line, each processing unit Discharge information collecting means for collecting a discharge signal of an object to be processed, component lot history collecting means for collecting lot information of input parts in each processing apparatus, and buffer number input means for inputting the number of buffers between processing apparatuses; ,
A component lot specifying unit for specifying a component lot of a product and a work-in-progress from the discharge information, the component lot history, and the number of buffers, and a display unit for displaying the component lot history information searched by the component lot specifying unit are provided. In addition, it is possible to provide highly reliable parts lot information immediately without increasing costs.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram of a parts lot management system according to the present invention. FIG. 2 is a diagram showing an example of a component lot number input screen in the component lot management system according to the present invention. FIG. 3 is a diagram showing an example of part lot history information registration data in the part lot management system according to the present invention. FIG. 4 is a diagram showing an example of a buffer number input screen in the parts lot management system according to the present invention. FIG. 5 is a diagram showing an example of buffer number registration data in the component lot management system according to the present invention. FIG. 6 is a diagram showing an example of emission information registration data in the parts lot management system according to the present invention. FIG. 7 is a diagram showing an example of an input / output screen in the component lot management system according to the present invention. FIG. 8 is a diagram showing management component names and their input stations in the component lot management system according to the present invention. FIG. 9 is a flowchart showing an input part lot number specifying procedure in the part lot management system according to the present invention. [Description of Signs] 1 Emission information collecting means 2 Component lot history collecting means 3 Component lot specifying means 10 Component lot management computer 11 Input / output interface 12 Input means 13 Display means 14 Processing unit 15 CPU 16 Data storage unit

Claims (1)

Claims: 1. A component lot management system for displaying lot history information of a component input by each processing device of a production line, wherein discharge information for collecting a discharge signal of an object to be processed in each processing device. Collecting means, component lot history collecting means for collecting lot information of input parts in each processing device, buffer number input means for inputting the number of buffers between the processing devices, and the discharge information, component lot history, and the number of buffers. A parts lot identification means for identifying a parts lot of a product and a work in process;
A component lot management system comprising a display unit for displaying component lot history information searched by the component lot specifying unit.