JPS63145588A - Maintenance guidance apparatus for equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a maintenance guidance device that notifies the maintenance and inspection of production equipment, courtesy equipment, etc. in a factory.

[Conventional technology]

Conventionally, as this type of device, for example, Japanese Patent Application Laid-Open No. 58-2112
As shown in No. 91, the number of operations and operation time are accumulated based on the operation signal indicating the on/off state of the equipment,
There is a system in which when the integrated value matches a preset setting value, an announcement or display indicating that maintenance and inspection should be performed is made.

[Problem that the invention seeks to solve]

However, in the conventional equipment described above, the setting value for when maintenance and inspection should be performed is fixed, so the timing of maintenance and inspection may be inappropriate depending on the operating frequency and operation history of the equipment, and in some cases, it may cause unrecoverable failures. There was a problem that this occurred. In other words, when production equipment, etc. is operated for a longer period of time or is operated more frequently, the fatigue and wear of parts increases.

As operating hours increase, the frequency of failures also increases.

In particular, when fatigue and wear limits are exceeded, the frequency of failure occurrence increases rapidly. Therefore, it is important for production management to perform maintenance inspections such as lubrication before this fatigue and wear increases, and to maintain the equipment's performance as much as possible when it was a new product. but.

In conventional equipment, the set value for when maintenance and inspection should be performed is set based on experience and theoretical values without taking such operating history into account at all, and this is fixed, so the current state of fatigue of a single piece of equipment is It becomes impossible to notify the appropriate maintenance and inspection period according to the wear and tear condition, resulting in unrecoverable failures, or even if recovery is possible, prolonging the repair time, increasing maintenance costs and decreasing productivity. There was a problem with bringing it.

SUMMARY OF THE INVENTION An object of the present invention is to provide a maintenance guidance device for equipment that can notify an appropriate maintenance/inspection period commensurate with the current state of fatigue of the equipment.

[Means for solving problems]

The present invention provides a first means for accumulating the operating time or number of operations of the applicable equipment, and changing a maintenance cycle value that is a standard for notification of maintenance and inspection according to the accumulated value; and second means for correcting the maintenance cycle value of the same type of equipment to the actual value up to the occurrence of the abnormality.

[Effect]

The maintenance cycle value, which serves as a maintenance inspection notification standard, is changed depending on the cumulative operating time or number of operating times of the equipment up to the present. Further, if an abnormality occurs, the maintenance cycle value is further corrected to the actual value up to the occurrence of the abnormality.

This is also done for devices of the same type.

〔Example〕

FIG. 1 is a block diagram showing an embodiment of the maintenance guidance device according to the present invention, and 1-1 to 1-x are switches that are turned on when each of X devices (not shown) is in operation. Yes, the operation time of the X devices is calculated by integrating the on-times of these switches. A switch that is turned on when 1'-1 to 1'- or X devices fail; 2 is a process input that receives the output signals of switches 1-1 to 1-x and 1'-1 to 1'-x; The device 3 accumulates the operating time of each device based on the output signals of the switches 1-1 to 1-x, and compares the cumulative value with a set value for determining the maintenance inspection time.

A microcomputer that determines whether each device has reached its maintenance inspection period or not, and changes the above-mentioned set values according to the operation time and failure time of each device.

4 is a display device that displays the operating time of each device and the device number that has reached its maintenance/inspection time; 5 is a light bezel; 6 is a keyboard; and 7 is a typewriter.

FIG. 2 is a diagram showing the relationship between the cumulative value N of operating hours and the maintenance cycle Q. For each device, the cumulative value N of operating hours is the operating time value (actual value) up to the wear area determined for each device. no (ar) + no (ax).

-no (ax) v no (bt) p no (
At), the maintenance cycle measured value q (indicated by a broken line in the figure), which is cleared each time maintenance and inspection work is performed, reaches the upper limit value al, aQ, . . . for each device.
Each time axial, bt, or QI is reached, it is instructed that maintenance and inspection work should be performed.

Here, no (ax) * −no (ax) e
no(bt).

a, b, and c of no (ct) represent the type of equipment, and
represents the number within the same type.

On the other hand, in the period exceeding the wear region, the upper limit value of the maintenance cycle a + (i = 1~x) z b + +
c t is the cumulative value N of the driving time up to that point and the reduction rate k
at,' is changed to be shorter in accordance with ki+t+kc+, and a comparison between the changed upper limit value and the measured value q informs whether or not maintenance/inspection should be performed.

In other words, if the number of types of devices is only a type, then under the condition of N<no(at), Q = at...
- As for (1), it is announced whether or not maintenance inspection should be performed by comparing Q and q. Also, under the condition of N≧no(at).

Q=at (1(N-no (at)) ka+)
- (2) By comparing Q and q, it is announced whether maintenance or inspection should be performed.

FIG. 3 is a simplified diagram of the management table 110 (located in the microcomputer) that stores data for such maintenance management, and shows the upper limit values a1 to c of the maintenance cycle.
I. Operating time value no when reducing maintenance cycle
(at) + no (bt) + no (ct)
, reduction rate kat, kbty kc* are set for each device, and cumulative operating time values Nai, Nbi.

NcI, maintenance cycle measurement value qat r C1bi
vqct.

The daily integrated values α5, β amount, and γeast are stored.

FIGS. 4(a) and 4(b) are flowcharts showing the operation of the microcomputer 11 for settling the operating time N and the maintenance cycle measured value q. 9 is integrated in units of one minute, and the integration results are integrated in one day's vehicle position by the one-day process shown in FIG. 2(b). Then, N and q in one day
Once the integration has been completed, maintenance guidance processing is executed based on the integration results.

FIG. 5 is a flowchart showing details of the maintenance guidance process. First, it is determined whether or not the upper limit of the maintenance cycle needs to be changed based on the presence or absence of equipment failure.
If there is a failure in a device, after selecting the same type of device as the failed device, it is determined whether a specific device whose upper limit value is to be excluded from being changed is specified by the keyboard 6 or the light pen 5, and the instruction is made. Change the upper limit value of devices other than those that have been installed to the operating time value of the failed machine (operating time value from the time of the previous maintenance to the time of failure).

As a result of this, 1. For example, if one of the equipment groups that should undergo maintenance every 5,000 hours breaks down 4,000 hours after the previous maintenance, the upper limit of the maintenance cycle for the same type of equipment including the faulty machine. The value is changed to 4000 hours.

As a result, other devices that have the same risk as the failed device will be notified that they should undergo maintenance before a failure actually occurs.

On the other hand, if there is no malfunctioning machine, after calculating the maintenance cycle Q using the above-mentioned equations (1) and (2), the necessity of maintenance is determined by comparing it with the time measurement value q from the time of the previous maintenance. For devices with Q<q, the device number and inspection items are registered in the message output memory area. When the determination of whether or not maintenance is necessary for all the devices is completed, the display device 4 and typewriter 7 output the device numbers requiring maintenance and inspection items registered in the message output memory area.

FIG. 6 is a flowchart showing the details of the process of changing the maintenance cycle upper limit value of the same type of equipment when a faulty machine occurs. For example, when the equipment A1 of the A group in FIG. Assuming that a failure occurs in Compare no(aj) of device Al and NJIJ.

That is, Naz is the operating time value no(at) in the wear region.
Compare whether it is smaller than or not. As a result, Nax<n.

If (al), then the maintenance cycle upper limit value al of device A1
Change to qal. After this, j is set to 2, and the same process is performed for the second device A2.

If Naz<n o (a2), the upper limit a2 of device A2 is changed to qal. Such processing is repeated until j=i, and for equipment that has not reached the wear region, the maintenance upper limit value of that equipment is changed to qai. However, for devices that have already reached the wear range, the reduction rate kas is corrected according to the Nat of the failed device, and the maintenance cycle is sequentially corrected using this new reduction rate.

That is, for the jth device that has reached the wear region, kaA= (al qat)/aa(Nax no
(al))...(3) The reduction rate is corrected by the following.

As a result, even for equipment that has reached the wear range, the failure time of the failed machine is reflected.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to notify the maintenance period commensurate with the operating performance of the equipment, and it is possible to prevent unrecoverable failures caused by missed maintenance periods, increase in maintenance costs, and improve productivity. It has the excellent effect of being able to prevent the IF from decreasing.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a relationship diagram between cumulative operating time and maintenance cycle, and FIG.
The figure is a structural diagram of a management table that stores data for managing maintenance cycles. FIG. 4 is a flowchart of a process for accumulating operating hours and maintenance cycles, FIG. 5 is a flowchart showing details of a maintenance guidance process, and FIG. 6 is a flowchart of a process for changing a maintenance cycle. 1-1 to 1-x, 1'-1 to 1'-x...switch,
2... Process input device, 3... Microcomputer, 4... Display device, 6... Keyboard, 7... Typewriter.

Claims (1)

[Scope of Claims] 1. A maintenance guidance device that monitors the operation and operation of equipment and issues instructions for maintenance and inspection of the equipment, which accumulates the operating time or number of times the equipment is operated, and calculates the cumulative value. The first method is to change the maintenance cycle value that serves as the standard for notification of maintenance inspections, and the second method is to correct the maintenance cycle value of the device and the same type of equipment to the actual value up to the occurrence of the abnormality when an abnormality occurs in the device. 2. A maintenance guidance device for equipment comprising the means of item 2.