JP2001317876A - Continuous treatment system and display therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a continuous treatment system capable of assisting specification of treated lots influenced by abnormality generated in a treating unit and a display therefor. SOLUTION: A continuous quenching furnace 1 comprises heating zones 11 to 15 for quenching workpieces W. A first conveyor 2 continuously conveys workpieces W in a plurality of lots to be treated along a route passing through the continuous quenching furnace 1. A conveying speed sensor 30 detects the conveying speed of the first conveyor 2. An information processor 23 calculates the positions of the workpieces W based on the loading times and conveying speeds of the leading and trailing workpieces W in each treated lot. Detecting mechanisms S1 to S5 detect treatment conditions such as heating temperature, carbon potential and the like. When these treatment conditions become abnormal, abnormal history information is recorded in a storage unit 25. The information processor 23 specifies treated lots influenced by abnormality to store the lot numbers in the storage unit 25 as abnormal history information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous processing apparatus for continuously performing predetermined processing such as heat treatment on a plurality of works, and a display device for such a continuous processing apparatus.

[0002]

2. Description of the Related Art A continuous furnace is a device that conveys a workpiece at a speed determined for each processing lot and heats the workpiece during the processing under processing conditions determined for each processing lot. is there. Since processing lots are successively introduced into the continuous furnace, a situation in which a work at the end of a certain lot and a work at the head of the subsequent lot are mixed in the furnace often occurs. Further, the conveyor speed is determined for each processing lot, and is often changed.

[0003] The continuous furnace includes, for example, a plurality of zones along a work transfer path, and the heating temperature is controlled for each zone. If a temperature abnormality occurs in any one of the zones, a workpiece that has passed through the zone in which the abnormality has occurred has a processing failure. Therefore, it is necessary to select such a work, and to reprocess or discard it. The atmosphere in the continuous furnace is
Although the carbon potential is kept within a certain range, if the carbon potential falls outside the range of the normal value, the atmosphere becomes abnormal and the quenching process becomes defective. The work existing in the continuous furnace during the period in which the atmosphere abnormality occurs becomes a processing failure.

In a conventional control system for a continuous furnace, the time at which a processing lot is introduced into the continuous furnace, the name of the processing equipment (zone or the entire continuous furnace) in which an abnormality has occurred, and the time at which the abnormality has occurred are recorded as a processing history. It is supposed to be. However, it is often difficult to accurately specify the processing lot that has been set in the continuous furnace based on the time when the abnormality has occurred.

[0005]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned technical problem and provide a structure capable of supporting the specification of a processing lot affected by an abnormality generated in a processing section. It is to provide a continuous processing device. Further, an object of the present invention is to make it possible to easily compare a change in processing conditions in the processing unit with a state of processing of a processing lot, thereby supporting the specification of a processing lot affected by an abnormality. A display device for a continuous processing apparatus is provided.

[0006]

Means for Solving the Problems and Effects of the Invention According to the first aspect of the present invention, there is provided a processing unit (1, 11 to 11) for performing a predetermined process on a work (W).
15) and a continuous transport mechanism (2) for continuously transporting a plurality of workpieces along a path passing through the processing section, wherein the continuous processing apparatus continuously processes workpieces of a plurality of processing lots. Abnormality detecting means (S1 to S5, 23) for detecting occurrence of an abnormality in the processing section, and transport speed monitoring means (30) for monitoring a transport speed by the continuous transport mechanism.
Processing history recording means (23, 25) for recording processing history information including input time information indicating the input time of the first and last workpieces of each processing lot into the processing section; When detected, based on the transport speed monitored by the transport speed monitoring means and the input time information recorded by the processing history recording means, a processing lot identification that identifies a processing lot affected by the abnormality. (23) and an abnormality history recording means (23, 25) for recording abnormality history information including identification information of the processing lot specified by the processing lot specifying means. is there. It should be noted that the alphanumeric characters in parentheses indicate corresponding components and the like in the embodiments described later. Hereinafter, the same applies in this section.

According to the above configuration, when an abnormality occurs in the processing section, the processing lot affected by the abnormality is specified, and the identification information of the specified processing lot is recorded as the abnormality history information. Therefore, by referring to the abnormality history information, it is possible to easily specify the processing lot affected by the abnormality that has occurred in the processing unit. The position of the workpiece transported by the continuous transport mechanism can be specified based on the transport speed of the continuous transport mechanism if the input time is specified. On the other hand, the input times of the first and last works of each processing lot into the processing section are recorded as processing history information. Therefore, for example, a processing lot in which any of the works from the beginning to the end exists in the processing unit when an abnormality occurs can be specified as a processing lot affected by the abnormality.

The abnormality history information may include, in addition to the identification information of the processing lot affected by the abnormality, the date and time of occurrence of the abnormality, the location of the abnormality, and the content of the abnormality. The processing unit may be one processing facility as a whole or a part of one processing facility. That is, one processing facility may be composed of a plurality of processing units. In such a case, the identification information of the processing unit may be recorded as the abnormality history information as the abnormality occurrence location.

Further, for example, in the case of a continuous heating furnace in which a plurality of heating zones are connected in series, the heating temperature abnormality in each heating zone is limited only to the work that has passed through the heating zone during the period in which the heating temperature abnormality occurred. Reach. On the other hand, when a plurality of heating zones share a common atmosphere and an abnormality occurs in the atmosphere, the influence of the atmosphere abnormality is caused by any one of the heating zones constituting the continuous heating furnace. To all the workpieces that have passed during the abnormal atmosphere occurrence period. In such a case, the identification information of the whole continuous heating furnace (processing equipment) is recorded as the abnormality occurrence location.

According to a second aspect of the present invention, there is provided a processing unit (1, 11-15) for performing a predetermined process on a work (W),
A continuous transport mechanism (2) for continuously transporting a plurality of workpieces along a path passing through the processing section, and for displaying a processing status in a continuous processing apparatus for continuously processing workpieces of a plurality of processing lots. A processing condition display unit (41) for displaying a detection amount corresponding to the processing condition of the processing unit in a chart along a time axis, and a processing condition of each processing lot in the processing unit according to the processing condition. A display device for a continuous processing apparatus characterized by including an in-process status display section (42) for displaying a chart in accordance with a time axis on a display section and a common time axis.

According to this configuration, the detection amount corresponding to the processing condition of the processing unit and the in-process status of the processing lot in the processing unit are displayed in a chart along a common time axis. Therefore, by comparing these charts, it is possible to easily grasp the quality of processing for each processing lot. In particular, if the in-process situation of the processing lot at the time when the detection amount corresponding to the processing condition shows an abnormal value is grasped,
The process lot affected by the abnormality can be easily grasped.

According to a third aspect of the present invention, a condition history recording means (23, 25) for recording a detection amount corresponding to a processing condition of a processing unit along a time axis, and a processing condition recorded in the condition history recording means. Means (2) for creating a processing condition chart to be displayed on the processing condition display section based on the detected amount of
3) is preferably further included. According to a fourth aspect of the present invention, input time information indicating the input time of the first and last works of each processing lot into the processing section, and the withdrawal of the first and last works of each processing lot from the processing section. Processing history recording means (23, 25) for recording processing history information including exit time information indicating a time; and the in-process status display based on the input time information and the exit time information recorded in the processing history recording means. A means (23) for creating a work-in-progress status chart to be displayed in the section may be further included.

In this case, the in-process status of the processing lot can be displayed only by recording the input and exit times of the work at the beginning and end of each processing lot, so that the amount of recorded information can be reduced. It is preferable that a matching cursor for matching the chart of the processing condition display section with the chart of the in-process status display section is further displayed. This makes it easier to grasp the processing status of the processing lot.

[0014]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a conceptual diagram for explaining a configuration of a continuous heat treatment apparatus according to one embodiment of the present invention. The continuous heat treatment apparatus includes a continuous quenching furnace 1, a first conveyor 2 for conveying a workpiece W to be heat-treated in the continuous quenching furnace 1, an oil tank 3 storing cooling oil for quenching, Conveyor 5 for transporting the workpiece W out of the oil tank 3 and the continuous quenching furnace 1
And a work transfer guide portion 6 for guiding the work W falling from the oil tank 3 to the oil tank 3. A plurality of processing lots are sequentially loaded into the first transport conveyor 2 by the loading machine 21. Then, the continuous quenching furnace 1 continuously performs quenching processing on works W of a plurality of processing lots having different processing conditions.

The charging machine 21 is provided outside the continuous quenching furnace 1 in relation to the first conveyor 2.
The loading machine 21 aligns and loads the workpiece W on the first conveyor 2. An information input device including, for example, a barcode reader is provided near the input device 21. The signal from this information input device is provided to main information processing device 22 composed of a programmable controller. The main information processing device 22 can perform information communication with an information processing device 23 including a computer. The main information processing device 22 controls the continuous quenching furnace 1, the first transport conveyor 2, the oil tank 3, and the second transport conveyor 5 according to processing conditions predetermined for the workpiece W of each processing lot. That is,
Actuating controllers 1a, 2a, 3a, 5 associated with each
Control signals corresponding to processing conditions such as a heating temperature, a heating time, and a cooling oil temperature are given to “a”, and each operation controller executes control of a corresponding component according to the control signal.

The continuous quenching furnace 1 has, for example, a plurality of (for example, five) heating zones 11, 12, 13, 14, and 15 in which a plurality of individually controlled heaters are arranged. And each controller 1 for operation of a plurality of heaters
1a, 12a, 13a, 14a, and 15a are individually controlled by the main information processing device 22. More specifically, a heating temperature command is given to the operation controllers 11a to 15a of the respective heating zones 11 to 15, and the energization to the heaters of the respective heating zones is controlled accordingly.

Further, a heating time command is given to the operation controller 2a corresponding to the first transport conveyor 2, and the transport speed of the work W by the first transport conveyor 2 is variably controlled in response to the instruction. In order to detect the transfer speed of the work W in real time, a transfer speed sensor 30 is provided in association with the first transfer conveyor 2. The transport speed data detected by the transport speed sensor 30 is transmitted to the main information processing device 2
2 is given.

The plurality of heating zones 11 to 15 are further provided with detection mechanisms S1 to S5 for detecting process data indicating the heat treatment status in each of the heating zones 11 to 15 in time series. Detection mechanism S1
Process data detected by steps S5 to S5 include a carbon potential indicating the quenching ability of the atmosphere in each heating zone, a heating temperature, and the like. The process data detected by the detection mechanisms S1 to S5 is stored in the main information processing device 2
2 given.

An operator uses an information input device (bar code reader) to read a bar code on a tag attached to a container of a processing lot. The data represented by this bar code includes a product type number and a lot number (identification data). The main information processing device 22 detects a time at which the input machine 21 transfers the first work W of the processing lot to the first transport conveyor 2 by a start operation of the input machine 21 by an operator, and notifies the information processing device 23. I do. In addition, input machine 2
1 detects the input end signal of the input device 21 and notifies the information processing device 23 of the time at which the last work W of the processing lot is transferred to the first conveyor 2. As a result, the information processing device 23 transmits the identification data read by the information input device, date and time data indicating the start and end of transfer of the processing lot to the first transport conveyor 2, and the identification data. You will get

The information processing device 23 includes a main information processing device 22
, The process data detected by the detection mechanisms S1 to S5, and the above-described identification data and date and time data are acquired and stored in the storage unit 25. Based on these, the information processing device 23 executes a monitoring program for determining whether or not there is an abnormality in the heat treatment process, and outputs a monitoring signal. A monitor screen is displayed on the display device 28 based on the monitor signal. The storage unit 25 may be configured by an external storage device such as a hard disk device or a magneto-optical disk device.

The information processing apparatus 23 obtains each time (input time) at which the first and last works W of each processing lot are input into the continuous quenching furnace 1, and records the obtained times as processing history information in the storage unit 25. Further, the information processing apparatus 23 records, in the storage unit 25, each time (the exit time) at which the first and last works W of each processing lot exited the continuous quenching furnace 1 as the processing history information. The input time and the exit time are determined based on the time when the work W is transferred to the first transport conveyor 2 (recorded in the storage unit 25) and the transport speed data from the transport speed sensor 30. It is calculated by the device 23. Specifically, each work W
Is obtained by integrating the transport speed detected by the transport speed sensor 30 with respect to time, so that the workpiece W is moved to the input position (the entrance of the continuous quenching furnace 1) and the exit position (the exit of the continuous quenching furnace 1). Each time reached can be determined.

On the other hand, the information processing device 23 includes a detecting mechanism S1.
The process data from S5 to S5 is constantly monitored, and the process data is recorded in the storage unit 25 as condition history information in chronological order. If the process data deviates from a preset normal value range, it is determined that an abnormality has occurred, and the date and time of the abnormality, the type of the abnormality, and the location of the abnormality (heating zone name, etc.) are stored as abnormality history information. Recorded in the unit 25. Further, when returning from the abnormality, the recovery date and time, the type of the abnormality and the location of the abnormality are recorded in the storage unit 25 as the abnormality history information.

At this time, the information processing device 23
Based on the data stored in No. 5, the processing lot name of the work W being processed at the place where the abnormality has occurred or recovered is recorded as abnormality history information. In this case, the processing lot name to be recorded may be one, but the work W at the end of a certain processing lot and the work W at the head of the next processing lot may be commonly present in the abnormality occurrence location. Therefore, two processing lot names may be stored. Of course, it is possible to record three or more processing lot names, but usually, three or more processing lot names can be stored in the continuous quenching furnace 1.
There is little need to consider the case where works W belonging to two different processing lots are mixed.

FIG. 2 is a diagram showing a recording example of the abnormality history information. Each record that constitutes the abnormality history information has a date and time indicating the time of occurrence or recovery of the abnormality, a type indicating either the occurrence or recovery of the abnormality, the details of the abnormality, and the occurrence of the abnormality at the time of occurrence or recovery of the abnormality. And the processing lot number that was being processed at the location. As the “abnormality content”, the location where the abnormality has occurred and the type of the abnormality that has occurred or recovered are recorded. For example, when it is detected that the heating temperature has deviated from the range of the normal value in the third heating zone 13, the time when the temperature deviates from the normal value is recorded in the date and time field F1, and the type "occurrence" indicating the occurrence of the abnormality is set to the type. This is recorded in the field F2, and the fact that a temperature abnormality has occurred in the third heating zone 13 is recorded in the abnormality content field F3, and at this time, one or two processes to which the workpiece W located in the third heating zone 13 belongs. The lot number is recorded in the processing lot number field F4.

Similarly, when the heating temperature returns to the normal value range, the time is recorded in the date and time field F1, the type "return" indicating abnormal recovery is recorded in the type field F2, and the third heating zone 13 The fact that the temperature is abnormal is recorded in the abnormality content field F3, and at this time, one or two to which the workpiece W located in the third heating zone 13 belongs.
The number of one processing lot is the processing lot number field F4
Will be recorded. When a plurality of quenching furnaces are monitored in common, a main information processing device that controls each quenching furnace is commonly connected to the information processing device 23. Then, information for identifying the quenching furnace in which the abnormality has occurred is recorded in the abnormality content field F3, such as "No. 1 furnace" or "No. 2 furnace".

If the carbon potential deviates from the normal value range, it is determined that the atmosphere is abnormal. The influence of the abnormal atmosphere extends not only to one heating zone but also to the entire area of the continuous quenching furnace 1. Therefore, when an atmosphere abnormality occurs, information for specifying the heating zone is not recorded in the abnormality content field. Generally, from the relationship between the length of the row of the work W constituting one processing lot and the length of one continuous quenching furnace, the processing lot number field F4 is set to 2
It is sufficient if the capacity is sufficient to record one processing lot number, and it is not necessary to secure enough capacity to record three or more processing lot numbers. Of course, if necessary, the numbers of three or more processing lots may be recorded.

The transfer speed of the first transfer conveyor 2 for transferring the work W in the continuous quenching furnace 1 is determined for each processing lot. That is, the transport speed is adjusted according to the heating time of the work W of each processing lot. For example, it is assumed that a row of the work W of the processing lot number AAAAAA precedes and a row of the work W of the processing lot number BBBBB follows. The transport speed corresponding to the processing lot number AAAAA is VA, and the processing lot number BBBB
It is assumed that the transport speed corresponding to B is VB. in this case,
When the workpieces W of the two processing lots of the processing lot numbers AAAAAB and BBBBBB are halved in the continuous quenching furnace 1, that is, the work W at the end of the processing lot number AAAAA and the work W at the head of the processing lot number BBBBBB When the intermediate point reaches the intermediate position in the continuous quenching furnace 1 in the transport direction, the transport speed of the first transport conveyor 2 is switched from the speed VA to the speed VB.

As described above, the information processing device 23 calculates the change in the position of the work W at the beginning and end of each processing lot by integrating the transport speed data detected by the transport speed sensor 30 in real time. Therefore, even if the transport speed changes, the positions of the work W at the beginning and end of each processing lot can be accurately grasped.
FIG. 3 is a diagram illustrating a display example on the display device 28.
The information processing device 23 records process data detected by the detection mechanisms S1 to S5 in chronological order as condition history information, and creates a processing condition chart according to a time axis based on the process history information. This processing condition chart is displayed on the processing condition display section 41 on the display screen of the display device 28.

Further, the information processing device 23 records, in the storage unit 25, the time at which the leading and trailing works W of each processing lot are put into the continuous quenching furnace 1 and the time at which the workpieces W leave the continuous quenching furnace 1 as processing history information. And based on this,
The in-process status of each processing lot is displayed on the in-process status display section 42 of the display screen of the display device 28 as an in-process status chart according to the time axis. In this case, the processing condition chart and the work-in-progress status chart share a common time axis 45.
Is displayed according to

Further, the direction perpendicular to the time axis 45 (the vertical direction in the example of FIG. 3) is displayed on the display screen of the display device 28.
Is displayed. The linear cursor 43 is moved along the time axis 45 (along the horizontal direction in the example of FIG. 3) by operating a suitable operation input means such as a pointing device, a keyboard, or a touch panel on the screen of the display device 28. Can be done. As a result, the process data at a specific time and the in-process status of the processing lot can be compared in detail.

Further, on the display screen of the display device 28, as necessary, a list 44 representing the lot number of each processing lot, the charging time into the continuous quenching furnace 1, and the model number of the work W of the processing lot is displayed. Near the list 44, a pair of scroll buttons 46 and 47 for scrolling the list up and down are provided. A processing condition chart and a work in progress chart are displayed near the processing condition display section 41 and the work in progress display section 42 on the time axis 4.
A pair of scroll buttons 48 and 49 for scrolling in common along 5 are provided.

These scroll buttons 46 to 49 are
It can be operated from the above-mentioned operation input means. In the processing condition display section 41, a time change of the process data (carbon potential in the example of FIG. 3) is displayed by a curve P, and an upper limit line PU representing an upper limit value and a lower limit value of the process data, respectively.
And the lower limit line PL are displayed. Therefore,
As indicated by reference numeral A1, if an abnormality occurs in the process data, this can be immediately grasped by comparing the curve P with the upper limit line PU and the lower limit line PL.
Then, by positioning the linear cursor 43 at a location where an abnormality has occurred in the process data, it is possible to immediately and visually grasp the in-process situation of the processing lot at that time.

The in-process status display section 42 displays the in-process status of each processing lot by a trapezoid 50. For example, near the center of each trapezoid 50, a processing lot number 51 corresponding to the trapezoid is displayed. The lower left apex of the trapezoid 50 indicates that the work W at the head of the processing lot is in the continuous quenching furnace 1.
It corresponds to the input time that was input to. In addition, trapezoid 50
The top left vertex corresponds to the exit time at which the leading work W of the processing lot exited the continuous quenching furnace 1. Further, the lower right vertex of the trapezoid 50 corresponds to the charging time at which the last work W of the processing lot was charged into the continuous quenching furnace 1. Further, the upper right apex of the trapezoid 50 corresponds to the time when the work W at the end of the processing lot leaves the continuous quenching furnace 1.

That is, the lowermost line L in the in-process status chart displayed on the in-process status display section 42
It can be said that 1 corresponds to the input time of the work W of each processing lot, and the uppermost line L6 corresponds to the exit time (input time to the oil tank 3) of the work W of each processing lot. Furthermore, broken lines L2 to L2 separating the lines L1 and L6.
L5 represents the time at which the workpiece W is put into the second to fifth heating zones 12. The time of introduction into the first quenching zone 11 is represented by a line L1.

FIG. 3 shows that an abnormal atmosphere has occurred at time t10, and the linear cursor 4 is located at the position of time t10.
3 shows a display example when 3 is combined. in this case,
The linear cursor 43 crosses the upper right corner of the trapezoid 50 corresponding to the processing lot “2” and the lower left corner of the trapezoid 50 corresponding to the processing lot “3” in the in-process status chart. Looking at this in detail, it can be seen that a part of the work W of the processing lot “2” remained in the fifth heating zone 15 at the time of occurrence of the abnormality t10. Further, it can be seen that the work W at the head of the processing lot “3” has reached near the center of the continuous quenching furnace 1.

After all, in this case, the processing lots "2" and "3" exist in the continuous quenching furnace 1, and these are affected by the abnormal atmosphere. Therefore, the work W of the processing lots “2” and “3” must be reprocessed or discarded so as not to be distributed as a final product on the market. The processing condition display section 41 can display a chart of process data arbitrarily selected from a plurality of process data.

FIG. 4 shows a processing condition chart showing a time change of the heating temperature on the processing condition display section 41, and the operation for specifying the work affected by the abnormal heating temperature by using the chart is described. FIG. In FIG. 4, the change over time of the heating temperature in the third heating zone 13 is displayed on the processing condition display section 41. That is, the processing condition display unit 4
In FIG. 1, lines TU and TL are shown, in which the temperature change is represented by a curve T and represents the upper and lower limits of the normal range of the heating temperature. In the example of FIG. 4, the period Δ in which the curve T interrupts the lower limit line TL is the abnormality occurrence period, the time t1 at the beginning of this period Δ is “abnormality occurrence time”, and the time t2 at the end of the period Δ is abnormal. From "return time".

The work W that has been passing through the third heating zone 13 during the period Δ is affected by the abnormal heating temperature. Then, the processing condition chart of the processing condition display section 41 and the processing state chart of the processing state display section 42 are compared using the linear cursor 43, and the processing lots to the third heating zone 13 between times t1 and t2 are compared. By grasping the in-process situation, a processing lot or a work affected by the abnormal heating temperature can be specified.

Specifically, at the time t1, the linear cursor 43
When the linear cursor 43 and the exit time of the workpiece W from the third heating zone 13 (the fourth heating zone 1
4. The intersection point 55 with the line L4 corresponding to the time of inputting the work W into the line W4 is found. Based on the transport speed of the first transport conveyor 2 corresponding to the work W of the processing lot where the intersection 55 is located (the processing lot “2” in the example of FIG. 4), a line 56 having a gradient corresponding to the transport speed is set to the intersection 55 Pull through. Thus, the time at the intersection 57 between the line 56 and the line L1 is the time at which the first work W affected by the abnormal heating temperature is put into the continuous quenching furnace 1. Also,
At the time of the intersection 58 between the line 56 and the line L6, the first workpiece W affected by the abnormal heating temperature
It is time to leave.

Further, when the linear cursor 43 is set at the time t2, an intersection point 59 between the linear cursor 43 and the line L3 corresponding to the time of feeding the work W into the third heating zone 13 is found. The transfer speed of the second transfer conveyor 2 corresponding to the work W of the processing lot where the intersection 59 is located (in the example of FIG. 4, it is located between the processing lots “2” and “3”). In the case of the example of FIG. 4, for example, an average value of the transport speeds of the processing lots “2” and “3” is obtained.) Based on this, a line 60 having a gradient corresponding to the transport speed is drawn so as to pass through the intersection 59. As a result, the time at the intersection 61 between the line 60 and the line L1 is the time at which the last workpiece W affected by the abnormal heating temperature is put into the continuous quenching furnace 1. The time at the intersection 62 between the line 60 and the line L6 is the time at which the last workpiece W affected by the abnormal heating temperature leaves the continuous quenching furnace 1.

Therefore, in the example of FIG. 4, the work W at the head of the processing lot “2” is not affected by the abnormal heating temperature, and the work W at the center and the rear end is abnormal in the heating temperature. Have been affected. Further, the work W at the head of the processing lot “3” is charged into the continuous quenching furnace 1 during the abnormal heating temperature period in the third heating zone 13, but earlier than when they reach the third heating zone 13. In addition, the abnormal heating temperature of the third heating zone 13 is eliminated. Therefore, it is understood that the work W of the processing lot “3” is not affected by the abnormal heating temperature in the period Δ.
As a result, the workpiece W charged into the continuous quenching furnace 1 during the period Δ1
Is affected by the heating temperature abnormality.

From these results, it is determined that the work W of the processing lot "2" is affected by the abnormal heating temperature, and appropriate measures such as reprocessing or disposal are taken. The work W of the processing lot “3” is treated as a non-defective product that is not affected by the abnormal heating temperature. If the lines 56 and 60 are displayed on the in-process status display section 42 by the operation of the information processing device 23, it becomes easy to specify the processing lot affected by the abnormal heating temperature. However, such lines 56 and 60 are
Even if the processing lot is not necessarily displayed on the display screen, the user can easily identify the processing lot affected by the abnormality by gaining some experience.

As described above, according to this embodiment, the abnormality history information includes the lot number of the processing lot affected by the abnormality. Therefore, even a less experienced worker can accurately specify a processing lot that may have a processing defect. Further, since the processing condition chart and the work-in-progress status chart are displayed on the display device 28 side by side, the processing status of each processing lot can be easily grasped, and when an abnormality occurs in the processing condition. Can be visually and promptly grasped.

While one embodiment of the present invention has been described above, the present invention can be embodied in other forms. For example, in the above-described embodiment, a continuous heat treatment apparatus has been described as an example, but the present invention is also applicable to a continuous processing apparatus that performs processing other than heat treatment. In the above-described embodiment, the input time and the exit time of the work at the beginning and end of each processing lot are recorded in the storage unit 25. However, when the display of the in-process status chart is unnecessary, the exit It is not always necessary to record the time.

In addition, various design changes can be made within the scope of the matters described in the claims.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram for explaining a configuration of a continuous heat treatment apparatus according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a recording example of abnormality history information.

FIG. 3 is a diagram illustrating a display example on a display device.

FIG. 4 is a diagram for explaining an operation of identifying a work affected by an abnormal heating temperature.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Continuous quenching furnace 2 1st conveyance conveyor 11-15 Heating zone 21 Input machine 22 Main information processing device 23 Information processing device 25 Storage part 28 Display device 30 Transport speed sensor 41 Processing condition display part 42 In-process status display part 43 Linear Cursor 45 Time axis S1 to S5 Detection mechanism W Work

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kunihiro Namikawa 229 Kahata-cho, Tenri-shi, Nara Prefecture Koyo Thermo System Co., Ltd. F-term (reference) 4K034 DA02 DA06 DA08 4K050 AA02 BA02 EA01 4K056 AA09 BA02 CA02 FA12 FA27

Claims (4)

[Claims] 1. A processing section for performing a predetermined process on a workpiece, and a continuous transport mechanism for continuously transporting a plurality of workpieces along a path passing through the processing section. A continuous processing apparatus for performing processing by means of: an abnormality detecting means for detecting occurrence of an abnormality in the processing unit; a transport speed monitoring means for monitoring a transport speed by the continuous transport mechanism; Processing history recording means for recording processing history information including input time information representing the input time of the work into the processing unit; and when the abnormality detecting means detects an abnormality, the processing speed is monitored by the transport speed monitoring means. Processing lot identification means for identifying a processing lot affected by the abnormality, based on the transfer speed and the input time information recorded by the processing history recording means, An abnormality history recording unit for recording abnormality history information including identification information of the processing lot specified by the processing lot specifying unit. 2. A processing section for performing a predetermined process on a workpiece, and a continuous transport mechanism for continuously transporting a plurality of workpieces along a path passing through the processing section. A processing condition display unit for displaying a processing status in a continuous processing device for performing processing in a processing unit, the processing condition display unit displaying a detection amount corresponding to a processing condition of the processing unit in a chart along a time axis, and each processing in the processing unit A display device for a continuous processing apparatus, comprising: an in-process status display section that displays a chart of the in-process status of a lot in accordance with a time axis in the processing condition display section and a common time axis. 3. A condition history recording means for recording a detection amount corresponding to a processing condition of a processing unit along a time axis, and a processing condition display unit based on the detection amount of the processing condition recorded in the condition history recording means. 3. A display device according to claim 2, further comprising: means for creating a processing condition chart to be displayed on the display device. 4. Insertion time information indicating the time at which the first and last work of each processing lot is inserted into the processing section, and exit time indicating the time at which the first and last work of each processing lot exits the processing section. Processing history recording means for recording processing history information including information; and, based on the input time information and the exit time information recorded in the processing history recording means, a process status chart to be displayed on the process status display unit. The display device according to claim 2, further comprising a creating unit.