JPS5848441B2 - Method for detecting abnormalities in processed materials in conveying equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for detecting an abnormality in processing material transported by a transport device.

A conveying device that arranges a large number of steel slabs of a predetermined shape on a walking beam at a predetermined interval, transports them in a fixed direction into a heating furnace, and feeds each slab one by one to the next process at the end of the walking beam. In conventional conveying equipment of this type, each billet is required to be lined up parallel to the adjacent billet at a constant interval even when moving to the next process. When feeding the pieces, each piece is controlled so that it has a predetermined posture and spacing, but during transportation, the posture of the piece is disturbed and it becomes slanted, or there is an abnormal situation where the piece comes close to an adjacent piece. could not be automatically detected.

SUMMARY OF THE INVENTION An object of the present invention is to provide an abnormality detection method that automatically detects abnormalities in the posture or spacing of conveyed steel pieces, etc., and enables smooth delivery to the next process.

For this purpose, the present invention detects the width of the material to be processed and the distance between the material to be processed and the material to be subsequently processed by a detection means on the extraction side of the conveying device, and combines this detection result with the processing at the time of charging which is stored in advance. The width of the material and the distance from the subsequently processed material are compared, and an alarm is issued when the difference between the detection result and the stored value exceeds a certain range.

An example of this invention will be explained below with reference to the drawings.

In Fig. 1, reference numeral 1 denotes a walking beam installed in the heating furnace, which is moved in a rectangular manner by a drive device (not shown), and conveys processing materials such as steel billets at a constant speed from the charging end 2 to the extraction end 3. ing.

Reference numeral 4 denotes a charging pusher which feeds the steel billet B sent to the charging table 6 into the charging end 2.

The length to which the steel billet B is fed is controlled by a known method while detecting the stroke of the pusher 4 with a detector 8.

For convenience, the steel pieces B are arranged in the order shown in Figure 1, starting from the leftmost position.

2B1jB2...Bo,...Bn+3, and the width of each piece of steel is Wi (i=0, 1, 2, 3,
・-・), spacing between steel slabs Si (i=o, 1, 2, . . .)
It is shown.

Reference numeral 9 denotes a first steel piece consisting of a projector, a light receiver, etc. installed at the charging end of the walking beam 1 to detect the width W of the steel piece B and the distance S between the subsequent and adjacent steel pieces. As shown in Fig. 3, the detector detects that the starting end of one steel piece B1 is the first
The distance of movement of the walking beam during the time when the rear end of the steel piece B1 leaves the first steel piece detector 9 after being detected by the steel piece detector 9 is counted by the pulse transmitter 19 to determine the steel piece width W1 (pulse number P). ), and the subsequent billet B.

Similarly to the above, the pulse transmitter 19 counts the amount of movement of the walking beam until the first billet detector 9 detects the starting end of the billet, thereby obtaining the billet spacing So.

The width Wi and the interval Si of each steel piece obtained by the first steel piece detector 9 and the pulse counting circuit are respectively determined by the A-D conversion circuit 1
0.11, it is converted to a daily signal, and the computer 1
The information is stored at an address corresponding to each piece of steel in the storage device 13 in 2.

14 is a second steel piece detector provided on the extraction side of the walking beam 1 to detect the width W of the steel piece B and the distance S between the subsequent adjacent steel pieces, and the first steel piece detector 9 It has the same configuration and functions as .

The width W and the spacing S of the steel pieces detected by the second piece detector 14 are converted into digital signals by the A-D converter circuits 15 and 16, and are applied to the comparison circuit 17 of the computer 12, and then stored in the storage device 13. The width and spacing detected by the first detector are compared with stored values representing the width and spacing, and if there is a difference between them by more than a predetermined range, an alarm signal is generated from the computer 12.

A pulse generator 19 measures the amount of movement of the walking beam every time the walking beam moves by a predetermined pitch.

Next, the operation will be explained.

The steel billets B supplied to the charging table 6 are placed one by one at predetermined intervals by the charging pusher 4 at the charging end of the walking beam 1.

The steel pieces B are fed to the position shown in FIG.

When this steel piece Bo reaches the position B1 and passes through the first steel piece detector 9, the width W corresponds to the width of the steel piece B as shown in FIG.
The pulses P of are counted by a counter, and the width of the steel strip W.

get. This width W.

is converted into a digital signal by the A-D conversion circuit 10 and stored at a predetermined location An of the storage device 13.

Further, subsequent billets are also fed in the same manner as described above, and the distance S between the first billet detector 9 and the next neighboring billet from the counter is maintained.

is detected and stored in a predetermined location An of the storage device 13.

Below, each piece of steel B is
are sequentially sent to the positions B2 j B3 t...Bn.

Further, every time the walking beam 1 moves by a predetermined pitch, a pulse signal is applied from the pulse generator 19 to the address count, and its contents change.

On the other hand, the width W and the interval S of each subsequent steel piece are sequentially stored at a predetermined address in the storage device 13 in the same manner as described above.

Now, when the leading steel piece B and the following steel pieces sequentially pass the position Bn, the second steel piece detector 14 detects their width Wn and interval S.
n-] is generated, and from this pulse Wn,S
A signal representing n-1 is converted into a digital signal by A/D conversion circuits 15 and 16 and applied to a comparison circuit 17.

At this time, the contents of the address counter have reached An,
The width W and the interval S regarding the steel piece B stored in An are read out from the storage device 13, and the comparison circuit 17 calculates Wn, Sn.
-1.

If W and Wn, and S and Sn 1 are each within predetermined ranges, it is determined that the width, posture, and spacing of the steel billet B are normal.

If the difference between W and Wn or the difference between S and Sn-1 is -
If it is outside the specified range, the comparator circuit 13 issues an alarm.

Examples of abnormal steel pieces are shown in Figures 4 to 6.

FIG. 4 shows a case where two billets B and B' are fed close to each other, and the pulse width Wn of the second billet detector 14 becomes larger than the width W of billet B, causing an alarm.

FIG. 5 shows a case where the steel piece B is oblique and approaching B'. In this case, the pulse width Wn becomes dog, the interval Sn becomes small, and an alarm is generated.

FIG. 6 shows a case where one of the steel pieces B' is bent. In this case, the pulse interval Sn becomes small and an alarm is generated.

When such an abnormality is detected and an alarm is generated, an operator manually operates the walking beam using a monitoring ITV to extract the defective steel piece.

In the above embodiments, a walking beam type furnace has been described, but similar effects can be obtained with a walking hearth type furnace.

As described in detail above, in a conveying device that conveys a plurality of steel slabs and other treated materials side by side, the width and interval of the treated materials are detected on the extraction side of the conveying device, and the detected values and the standard By comparing the values (in the example, the billet width and spacing at the time of loading into the conveyance device), abnormalities in the posture and spacing of the processed material can be automatically detected, and automatic extraction of the processed material can be performed. Since troubles can be prevented in advance, work efficiency can be improved.

[Brief explanation of drawings]

Fig. 1 is a diagram showing an actual case of this invention, Fig. 2 is a circuit diagram showing a control circuit used in the embodiment of Fig. 1, and Figs. 3 to 6 are a case in which a steel billet is fed. FIG. 1...Walking beam, 4...Putsha, 9...First billet detector, 12...
...Computer, 13...Storage device, 14.
...Second billet detector, 17...Comparison circuit.

Claims (1)

[Claims] 1 In a conveying device that sequentially supplies a plurality of treated materials one by one at predetermined intervals onto a conveying device and extracts each treated material one by one from the terminal end of the conveying device, processing is performed on the charging side of the conveying device. In addition to detecting and storing the width of the material and the distance between the material to be processed and the material to be subsequently processed by the detection means, the width and the distance of the material to be processed are also detected by the detection means on the extraction side of the conveyance device, and the width and the distance detected on this extraction side are stored. The interval is detected on the loading side of the conveyance device, and compared with the memorized width of the pre-processed material and the interval between the subsequently processed material, and if the width and interval detected on the extraction side are outside a certain range from the above memorized values. 1. A method for detecting an abnormality in a material to be processed in a conveying device, characterized in that an alarm is generated when this occurs.