JP2837046B2 - Quality control equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a quality control apparatus for analyzing the state of occurrence of a quality abnormality occurring in a workpiece or the like and providing data useful for countermeasures.

[0002]

2. Description of the Related Art Generally, quality control of a product is performed by inspecting whether or not each product has a quality abnormality with an inspection machine or manually, and when a quality abnormality is found, an abnormality occurs. It is performed by repeatedly performing operations such as excluding products from products and taking measures to eliminate the occurrence of the quality abnormality.

[0003]

In the above-described conventional quality control system, if a certain product has a quality abnormality that exceeds an allowable range, the product must be excluded from the product. Therefore, the production operation must be suspended. On the other hand, with the above-mentioned conventional quality management system, it is not possible to specifically grasp the state of occurrence of quality abnormalities, so that appropriate measures are not taken until quality abnormalities exceeding the allowable range occur in products. There is little at present.

[0004] Therefore, if the quality of abnormalities as described above is analyzed accurately before it occurs and measures can be taken to prevent the occurrence of abnormalities in quality, the production efficiency will be dramatically improved. Will do.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a quality control apparatus capable of accurately analyzing a quality abnormality occurrence situation and promptly providing a user with information useful for the countermeasure. And

[0006]

According to the present invention, there is provided an information analyzing means, a quality abnormality input means for inputting an item of an actually occurring quality abnormality to the information analyzing means, and displaying an analysis result of the information analyzing means. A quality abnormality storage means for storing the number of times each quality abnormality item is input from the quality abnormality input means or the stop time of the inspection operation associated with these quality abnormality items; and Display control means for arranging the quality abnormality items stored in the quality abnormality storage means in the order based on the number of times of inputting or in the order based on the length of the stop time of the inspection operation, and displaying the quality abnormality items on the display means. (Claim 1,
2).

Here, the inspection means may be singular or plural.

The quality abnormality input means includes an inspection means for collecting information necessary for determining the quality abnormality of the quality inspection object, and whether a quality abnormality has occurred based on the information collected by the inspection means. It is more preferable that the apparatus further comprises a quality abnormality determining means for determining whether or not a quality abnormality has occurred and inputting the quality abnormality item to the information analyzing means when it is determined that a quality abnormality has occurred (claim 3).

Further, there is provided an information storage means for sequentially storing information collected by the inspection means, and as the quality abnormality determination means, an abnormality of the quality itself of the quality inspection object inspected by the inspection means is determined. When it is determined that a quality abnormality has occurred, individual quality abnormality determination means for inputting this as the quality abnormality item to the information analysis means,
Analyzing the tendency of the quality change based on the information of the past plural times stored in the information storage means, and when the quality tendency is determined to be abnormal, the quality tendency to be input to the information analysis means as the quality abnormal item. By providing the abnormality determination means, more excellent effects as described later can be obtained (claim 4).

When a plurality of inspection means are provided, the individual quality abnormality judging means may be provided for each inspection means (claim 5). It is particularly effective to display on a means (claim 6).

[0011]

In the apparatus according to the first and second aspects, the item of the quality abnormality that has actually occurred is input to the information analysis means, and the number of times of input and the stop time of the inspection operation are cumulatively stored by the quality abnormality storage means. You. Under the control of the display control means based on an external command or the like, the input quality abnormal items are arranged in an order based on the magnitude of the number of times of input (that is, the frequency of occurrence) or the length of the stop time of the inspection operation. Displayed on the display means. Therefore, the user can easily and accurately grasp the occurrence state of each quality abnormal item by referring to the display contents.

In the apparatus according to the third aspect, information necessary for judging the quality abnormality of the quality inspection object is collected by the inspection means, and based on the information, the quality abnormality judgment means determines whether or not the quality abnormality has occurred. Determined automatically. If an abnormality has occurred, the quality abnormality item is automatically input to the information analysis means.

Further, in the apparatus according to the fourth aspect, regarding the determination of the quality abnormality, not only the abnormality of the quality itself of the quality inspection object inspected by the inspection means but also the information stored in the information storage means is determined. The tendency of the quality change is analyzed based on the information obtained a plurality of times in the past, and when the quality tendency is determined to be abnormal, the content is input to the information analysis means as the above-mentioned abnormal quality item. Therefore, by taking appropriate measures against the quality abnormality related to the quality tendency abnormality, it is possible to prevent the occurrence of an unacceptable quality abnormality in each quality inspection object.

According to a fifth aspect of the present invention, when a plurality of inspection means are provided, the individual quality abnormality determination means is provided for each inspection means. The possible abnormality determination items unique to each inspection means are determined by each inspection means, and the determination results are input to the information analysis means.

In the quality control device according to the present invention, the inspection means are arranged on the display means in the order of the number of times of inputting the abnormal quality item, and are displayed on the display means. The distribution of the occurrence frequency can also be grasped.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS.

The quality control device shown in FIG. 1 includes a quality abnormality input means 10, an input means 20, an information analysis means 30, and a display means 40.

The quality abnormality input means 10 includes n inspection machines 111, 112,..., 11n, information collection means 14, information storage means 16, quality tendency abnormality judgment means 18A, and individual quality abnormality judgment means 18B. ing.

Each of the inspection machines 111, 112,...
It measures information (for example, various dimensions, weights, etc.) necessary for quality determination of products (objects for quality inspection) which are sequentially carried in, and outputs measurement data output units 121, 122, and 122 for outputting the measurement data. .. 12n. The information collecting means 14 is provided for each of the inspection machines 111, 112,
, 11n are collected. The information storage means 16 sequentially fetches the collected data, classifies the data for each of the inspection machines 111, 112,..., 11n, and accumulates the accumulated data in the past data. It is something to memorize.

The quality trend abnormality judging means 18A analyzes the current tendency of the change of the data based on the measurement data stored in the information storage means 16, and the analyzed quality tendency is If it indicates that there is a possibility that an unacceptable quality abnormality may occur in the product in the near future, the quality tendency is determined to be abnormal, and the content of the quality trend abnormality is determined by the information analysis means 3.
0 is input as an abnormal quality item. Specifically, the quality tendency abnormality determining means 18A is configured to determine that there is an abnormality in the quality tendency when the analyzed quality tendency corresponds to any of the items shown in Table 1 below.

[0021]

[Table 1]

In this table, for example, "the latest nine values" means an average value calculated nine times in the past from the present, and similarly, "the latest region width nine" means the current value. This means the area width calculated nine times in the past from the start.

The individual quality abnormality judging means 18B determines whether or not an unacceptable quality abnormality has occurred in the product based on the currently collected data, regardless of the past data (for example, the measured dimensions are set in advance). Is determined to be out of the permissible dimensional range, and if it is determined that a quality abnormality has occurred, the content is input to the information analysis means 30 as a quality abnormality item.

The input means 20 comprises a keyboard or the like.
A command signal is input to the information analysis means in response to a user operation.

The information analysis means 30, as shown in FIG.
The apparatus includes a quality tendency abnormal arrangement storage unit 32A, an individual quality abnormality arrangement storage unit 32B, and a display control unit.

The quality trend abnormality organizing storage means (quality abnormality storage means) 32A includes a quality abnormality item input from the quality trend abnormality determination means 18A through the display control means 34,
The type of the inspection machine in which the quality abnormality has occurred and the time when the inspection machine has stopped due to the quality abnormality are taken in, and the number of times each quality abnormality item has been input is cumulatively stored. Similarly, the individual quality abnormality storage means (quality abnormality storage means) 32B includes a quality abnormality item input from the individual quality abnormality determination means 18B through the display control means 34 (that is, an item relating to abnormality of the quality of each product itself).
The type of the inspection machine in which the quality abnormality has occurred and the time when the inspection machine has stopped due to the quality abnormality are taken in, and the number of times each quality abnormality item has been input is cumulatively stored.

The display control means 34 receives a command signal from the input means 20 when a quality abnormality item is input from the quality tendency abnormality determination means 18A or the individual quality abnormality determination means 18B (that is, when a quality abnormality occurs). When the data is received, the data stored in the quality tendency abnormal arrangement storage means 32A or the individual quality abnormality arrangement storage means 32B is called and output to the display means 40.

Specifically, the display control means 34 includes an inspection device display control unit 36, a quality abnormality display control unit 37, and a stop time display control unit 38.

The inspection machine display control section 36 changes the name of the inspection machines from the first inspection machine 111 to the n-th inspection machine 11n when the above-mentioned abnormal quality item is input or when a command signal is input from the input means 20. The items are displayed on the display unit 40 in a descending order of the frequency of occurrence (that is, in order of the number of times the quality occurrence items are input to the quality tendency abnormal arrangement storage unit 32A and the individual quality abnormality arrangement storage unit 32B).

The quality abnormality display control section 37 is provided with the input means 20.
When the number-of-occurrences arrangement mode is selected by the operation of (1) and a specific inspection machine is selected, items of quality abnormalities that occurred in the inspection machine are arranged in descending order of the frequency of occurrence, and the display means 40
Is displayed. On the other hand, when the stop time reduction mode is selected by the operation of the input means 20 and a specific inspection machine is selected, the stop time display control unit 38 displays the item of the quality abnormality generated in the inspection machine. The display unit 40 displays the display in order from the longest stoppage of the inspection machine due to the quality abnormality.

The display means 40 is constituted by a CRT, a printer, or the like, and receives a command signal from the display control means 34 and displays predetermined contents to the outside.

Although not shown, each inspection machine 111,
At 112,..., 11n, the stop time of the inspection machine itself due to the quality abnormality is also measured, and the data is input to the information analysis means 30.

Next, the operation of this device will be described.

In FIG. 1, a product to be quality inspected is transported from the first inspection machine 111 to each of the inspection machines 112,..., 11n in order, and each of the inspection machines 111, 112,. Done. These inspection machines 11
The measurement data output from 1, 112,.
The information is collected by the information collecting means 14 and sequentially stored in the information storage means 16.

The quality trend abnormality judging means 18A statistically analyzes the quality trend based on the present data and the past data stored in the information storage means 16 and checks whether there is any abnormality. Is done. At the same time, the individual quality abnormality judging means 18B checks, based on the currently collected data, whether there is any abnormality in the quality of the product from which the data is collected.

Here, when the quality tendency abnormality determination means 18A or the individual quality abnormality determination means 18B determines that there is an abnormality, the quality abnormality item is displayed through the display control means 34 of the information analysis means 30 to indicate the quality tendency. Abnormal arrangement storage means 32A or individual quality abnormality arrangement storage means 32
B, these organizing and storing means 32A and 32B store the number of imports (that is, the number of occurrences of each quality abnormality item) and the inspection machine stop time due to the occurrence of the quality abnormality.

When an abnormal quality item is input as described above, or when a display command signal is input by operating the input means 20 by the user, the display control means 34 first sets the quality as shown in FIG. Display means 40 for displaying a list of abnormal machines
To be displayed. Here, as shown in the figure, the inspection machines are displayed in order from the one with the highest number of occurrences of the quality abnormality. At a glance, it is possible to determine whether preventive measures should be taken. In the example shown in the figure, it is understood that measures should be taken with particular emphasis on the inspection items of the after gauge EAG.

Then, when the user operates the input means 20 to select "1. After Gauge EAG" and selects the number-of-occurrences arrangement mode in a state where this screen is displayed, FIG. As shown, the name of each abnormal quality item stored for the after gauge EAG and the number of occurrences thereof are displayed. Here, each quality abnormal item is divided into two groups of quality trend abnormalities and individual quality abnormalities, and displayed in order from the highest number of occurrences in each group. It is possible to know whether or not a countermeasure should be taken by marking an abnormal item in particular.

On the other hand, instead of the occurrence count reduction mode,
When the stop time arrangement mode is selected, the quality abnormality items related to the selected inspection machine are displayed in descending order of the inspection machine stop time. FIG. 5 shows an example in which a cylinder head inner diameter measuring device is selected as an inspection device. By looking at this screen, it is possible to know which quality abnormal items need to be preferentially taken from the viewpoint of improving inspection efficiency. In the example of the figure, "Sheet surface 3"
It can be understood that the time required for the inspection is greatly reduced by intensively taking measures against the quality abnormality such as excessive inner diameter.

Although FIGS. 4 and 5 show display examples of quality abnormal items for individual quality abnormalities, in this apparatus,
Abnormalities in the quality trend analyzed based on data from the past multiple times are also displayed, so this quality trend abnormality is eliminated, that is, the cause of the abnormality in the quality of the product itself is removed in advance. By keeping
It is possible to more reliably prevent the occurrence of the abnormality in the quality itself, and there is an advantage that the production efficiency can be further improved.

Next, a second embodiment will be described with reference to FIG.

As shown in the first embodiment, when a large number of inspection machines 111, 112,..., 11n are used, as the number thereof increases, each of the inspection machines 111, 112,.
The items for which individual quality abnormalities need to be determined for the measurement data from a wide variety of items, and the structure of the determination means is complicated.

Therefore, in the second embodiment, instead of providing the common individual quality abnormality judging means 18B as in the first embodiment, the individual quality abnormality judging section 131 is provided for each of the inspection machines 111, 112,. , 132,..., 13n,
.., 11n, the individual quality abnormality is determined, and each of the determination units 131, 132,.
The individual quality abnormality judgment signal output from 3n is arranged by the information arrangement means 15 and input to the information analysis means 30. According to such a configuration, even in the case where the number of inspection machines is large and the determination content is diversified, it is possible to determine each abnormal quality item with a simple configuration as in the first embodiment. Also, when the number of inspection machines is increased or decreased, or when some of the inspection machines are replaced, there is almost no need to change the configuration other than the inspection machines, so that the versatility of the entire apparatus is improved.

In each of the above embodiments, the inspection and abnormality determination of each product are automatically performed, and the determination signal is input to the information analyzing means 30. However, the inspection and abnormality determination are performed. May be performed by a device independent of the information analysis means 30 or manually, and the user may directly input the abnormal quality item, the inspection machine stop time, etc. to the information analysis means 30 by operating a keyboard or the like. In this case, the keyboard or the like serves as the quality abnormality input means in the present invention.

Further, in each of the above embodiments, the both judging means 18
Although the determination signals of A and 18B are once input to the display control means 34, these determination signals may be directly input to both the organizing and storing means 32A and 32B.

The information analysis means 30 can be switched between a normal analysis mode and a weighted analysis mode, and when the weighted analysis mode is selected, as shown in FIG.
A weight score obtained by multiplying the number of quality abnormal cases generated by the inspection machine by the weight point for each abnormal item may be calculated, and the weight points may be rearranged in descending order and displayed on the display means 40.

[0047]

As described above, according to the present invention, the following effects can be obtained.

In the apparatus according to the first and second aspects, every time a quality abnormality occurs, the item or the like is input to the information analysis means, and the information analysis means sorts each quality abnormality item in the order of the number of inputs or in the inspection operation. Since the display is performed in the order of the length of the stop time, this display has an effect that the user can easily and quickly grasp the data useful for the measure against the occurrence of the quality abnormality.

More specifically, in the device according to the third aspect,
Inspection means collects information necessary to determine the quality abnormality of the quality inspection target, and based on this information, the quality abnormality determination means automatically determines whether or not a quality abnormality has occurred. In such a case, the abnormal quality item is automatically inputted to the information analysis means, so that the burden on the quality control operator can be further reduced.

Further, in the apparatus according to the fourth aspect, regarding the determination of the quality abnormality, not only the abnormality of the quality itself of the quality inspection object inspected by the inspection means but also the abnormality is judged.
Analyzing the tendency of the quality change by the quality trend abnormality judging means based on the past plural times of information stored in the information storage means,
When the quality tendency is determined to be abnormal, this is also input to the information analysis means as the above-mentioned quality abnormality item. An unacceptable quality abnormality can be prevented from occurring in the inspection object, and the production efficiency can be further improved.

In the apparatus according to the fifth aspect, the individual quality abnormality judging means is provided for each inspection means, and the inspection machine side judges the quality abnormality item peculiar to each inspection machine. Even when there are many types of quality abnormality determination items, such as when there are many items, the individual quality abnormality can be appropriately determined with a simple configuration. Also, when the number of inspection means is increased or decreased, or the type of inspection means is changed, only the quality abnormality determination means suitable for the additional or replacement inspection means is provided, and other configurations are almost changed. Since there is no need, there is an effect that the versatility of the entire apparatus can be further improved.

In the apparatus according to the sixth aspect, each inspection means is also displayed in the order of occurrence frequency of the quality abnormality, so that the quality abnormality occurrence status of each inspection means can be easily and accurately grasped. There is an effect that can be.

[Brief description of the drawings]

FIG. 1 is a functional block diagram of a quality management device according to a first embodiment of the present invention.

FIG. 2 is a functional block diagram of information analysis means provided in the quality control device.

FIG. 3 is a diagram showing an example of a display screen by a display unit of the quality management device.

FIG. 4 is a diagram showing an example of a display screen by a display unit of the quality management device.

FIG. 5 is a diagram showing an example of a display screen by a display unit of the quality management device.

FIG. 6 is a functional block diagram of a quality management device according to a second embodiment of the present invention.

FIG. 7 is a diagram showing another example of the display screen by the display means of the quality management device.

[Explanation of symbols]

, 11n Inspection machine (inspection means) 131, 132,..., 13n Individual quality abnormality determination unit 16 Information storage means 18A Quality trend abnormality determination means 18B Individual quality abnormality determination means 20 Input means 30 Information analysis means 32A Quality trend abnormal arrangement storage means (quality abnormality storage means) 32B Individual quality abnormality arrangement storage means (quality abnormality storage means) 34 Display control means 40 Display means

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G07C 3/14 G06F 17/00

Claims (6)

(57) [Claims] 1. An information analysis means, a quality abnormality input means for inputting an item of a quality abnormality that has actually occurred to the information analysis means, and a display means for displaying an analysis result of the information analysis means. The analysis means includes a quality abnormality storage means for storing the number of times each of the quality abnormality items is input from the quality abnormality input means, and an order of the quality abnormality items stored in the quality abnormality storage means based on the number of input times. And a display control means for displaying on said display means side by side. 2. An information analysis unit, a quality abnormality input unit for inputting an item of a quality abnormality that has actually occurred and a time when an inspection operation is stopped due to the quality abnormality to the information analysis unit, and the information analysis unit. Display means for displaying the result of the analysis, the information analysis means comprising: a quality abnormality storage means for storing each quality abnormality item from the quality abnormality input means and the inspection operation stop time associated therewith; A quality control device, comprising: display control means for arranging the quality abnormality items stored in the abnormality storage means in an order based on the length of the stop time of the inspection operation and displaying the items on the display means. 3. An inspection means for collecting information necessary for determining a quality abnormality of a quality inspection object as the quality abnormality input means, and a quality abnormality is generated based on the information collected by the inspection means. 3. A quality abnormality judging means for judging whether or not a quality abnormality has occurred, and inputting the quality abnormality item to the information analyzing means when it is determined that a quality abnormality has occurred. Quality control device as described. 4. An information storage means for sequentially storing information collected by the inspection means, and as the quality abnormality determination means, determines an abnormality in quality itself of the quality inspection object inspected by the inspection means. When it is determined that a quality abnormality has occurred, an individual quality abnormality determination unit that inputs this as the quality abnormality item to the information analysis unit, and a quality change based on a plurality of past information stored in the information storage unit. 4. A quality tendency abnormality judging means for analyzing the tendency of the quality, and when the quality tendency is judged to be abnormal, is input to the information analysis means as the quality abnormal item. Management device. 5. The quality control device according to claim 4,
A quality management device comprising: a plurality of inspection means; and the individual quality abnormality determination means provided for each inspection means. 6. The quality control device according to claim 4, further comprising a plurality of inspection means, wherein the display means is arranged so that the inspection means are arranged in descending order of the number of times of inputting the abnormal quality item and displayed on the display means. A quality control device comprising control means.