JPH012714A - Rolled material position detection device - 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 The present invention relates to a rolled material position detection device that derives the timing at which the leading end and tail end of the rolled material pass each roll in a rolling line in which a plurality of rolls are arranged.

Conventionally, there has been a device shown in FIG. 1 as this type of rolling material position detection device. In FIG. 1, the material to be rolled 1 is moved to the right side of the figure as indicated by the arrow, and rolling rolls 2-1 to 2-2-
Rolled by n. The rolling rolls 2-1 to 2-n are driven by electric motors 3-1 to 3-n, respectively.

Current detection type relays 4-1 to 4-n are connected to the power supply lines 3-1@ to 3-na of the electric motors 3-1 to 3-n, respectively.

In operation, the material to be rolled 1 is rolled by rolling rolls 2-1 to 2-H.
When the load on the #1 machines 3-1 to 3-n increases, the load current also increases and exceeds a predetermined value, so that the relays 4-1 to 4-n operate. And relay 4-
By detecting the timing at which the contacts 1 to 47H change from non-operating to operating, the tip of the material to be rolled 1 is aligned with the rolling roll 2.
-1 to 2-n is detected. Similarly, by detecting the timing at which the relays 4-1 to 4-n go from operating to inactive, the timing at which the tail end of the rolled material 1 passes through the rolling rolls 2-1 to 2-n is detected.

Normally, in such an operation, the electric motors 3-1 to 3-n
The load consists of the sum of the rolling load and tension load on the rolling rolls 2-1 to 2-n. The rolling load becomes a positive load from the tip to the tail end of the rolled material 1. However, due to changes in the tension of the material to be rolled 1, the strong load is applied to the roll on the upstream side, for example, the roll 2-1 relative to the roll 2-2.
may be negative. When the tension load on the rolling roll 2-1 becomes negative, as described above, the motives 3-1 to 3-
Since the load n is the sum of the rolling load and the tension load, it can be a negative load or a positive load depending on the relationship between the two, and relay 4
-1 may become inactive.

As is clear from the above explanation, the conventional rolled material position detection position can accurately detect the tip of the rolled material, but has the drawback that detection of the tail end becomes inaccurate due to fluctuations in tension load. Ta.

This invention was made in order to eliminate the drawbacks of the conventional method as described above, and by deriving the pattern when the rolling material passes through the leading medium and determining the passing pattern of the tail end based on this pattern. It is an object of the present invention to provide a rolled material position detection device that can accurately detect the position of the tail end.

Hereinafter, an embodiment of the present invention will be explained with reference to the configuration diagram of FIG. 2. In FIG. 2, rolling rolls 2-1-42-n are arranged along the material 1 to be rolled.
.about.3-n, and its load current is detected by relays 4-1 to 4-n, as in FIG. In this invention, furthermore, the distance L1+L on the upstream side of the rolling roll 2-1, the detector 5, and the distance L! A detector 6 is installed facing the material 1 to be rolled. The detector 5.6 consists of an ordinary magnetic or photoelectric detector and manually sends a signal 5atsa indicating the presence or absence of the material 1 to be rolled to the arithmetic unit 7. The rolling rolls 2-1 to 2-n are equipped with pulse generators 8-1.8-2 as first and second signal generators that share a rotating shaft with the rolling rolls 2-1.2-n. rolled, rolling roll 2
-112-H pulse train signal 8- proportional to rolling speed
1a and 8-2a are computing devices! Manpower will be provided on 17th. The arithmetic unit 7 has the functions of a pattern storage means, a tail end position detection means of the fabric, a second tail Z+C position detection means, and has a normal configuration including a counter.

I will explain the operation shortly. The timing at which the tip of the rolling ladle 1 passes through each of the rolling rolls 2-1 to 2-n is sequentially detected by relays 4-1 to 4-n, as in the prior art. At this time, the pulse train signal 8- sent out from the pulse oscillator 8-1 by the pattern storage means included in the arithmetic device 7
1a and the timing of detection signals sequentially sent from relays 4-1 to 4-11, a pattern of timings at which the tip of the material to be rolled 1 passes through each of the rolling rolls 2-1 to 2-n is memorized. That is, the signal 8-1a of the pulse train generated from the first pulse generator 8-1 until the tip of the material to be rolled 1 is bitten by the rolling roll 2-1 and then bitten by the rolling roll 2-2. Count number C! is stored in the calculation device 7, and the count C3 until the tip of the rolled material 1 reaches the roll 2-3 from the roll 2-2 is stored in the calculation device 7. -3.2-4
The count numbers C1, . . ., Cn between 2-(n-IL 2-o) are stored in the arithmetic unit 7, respectively.

Furthermore, by the function of the first tail end position detection means of the calculation device 7, the tail end is located at the first stand due to the signals 5a and 6a obtained from the detector 5.6 indicating the passage of the tail end of the material to be rolled 1. The timing of passing through the rolling roll 2-1 is derived.

That is, the distance between the detector 5 and the detector 6 is Ll, the distance between the detector 6 and the rolling roll 2-1 is Lz, and the rolled material 1
If the number of pulses of the signal 8-1a generated from the pulse generator 8-1 after the tail end passes the detector 5 and reaches the detector 6 is C1'', then the tail end is the rolling part of the first stand. The timing of passing through the roll 2-1 is determined by the number of pulses counted after passing through the detector 5 C1 or Ll+L2 c1=c,'...
...(1) When it becomes l.

Further, the material to be rolled l is the rolling roll 2-2 of the second stand.
2 + n is based on the passing pattern C2...Cn of the leading end of the rolled material 1 and the timing at which the tail end of the rolled material 1 passes through the rolling roll 2-1 of the M1 stand. , can be predicted as if it were missing.

First, the tail end of the material to be rolled 1 is the rolling roll 2 of the first stand.
The counts of the signal 8-11° 8-2a of the pulse generator 8-1, 8-2 within a unit time until it passes through -1 are respectively P 1 and P n .

This count number P 1 e-P n within unit time is determined by the fact that during rolling operation, as shown in Fig. 2, both the tip and tail ends of the rolled material l exist between the first and nth stands. Since the rolling pattern in a steady state is progressing without any movement, a stable predetermined count number is maintained.

Now, assuming that the rolling pattern does not change between passing the tip and passing the tail, these pulse signals 8-1alB-
There is no change in the count numbers Pl and Pi ni of 2@. Therefore, the pulse count number P1 of the pulse generator 8-1
and /f JL/s count number P of pulse generator 8-2
The ratio to n is the rolling roll 2- of the first and second stands.
It should match the ratio of the pulse count number of pulse generator 8-1 and the pulse count number of pulse generator 618-2 between 1 and 2-2. Therefore, the tail end of the rolled material l is the first
Count number 02 of the signal 8-2a sent from the pulse generator 8-2 from passing through the stand (7) pressure roll 2-1 until passing through the rolling roll 2-2 of the second stand
is as follows.

l″1 In other words, after the tail end of the rolled material 1 passes the rolling roll 2-1, the tail end of the rolled material 1 .

The tail end of the rolled material 1 passes through the rolling roll 2-2 of the second stand.
The arithmetic unit 7 detects the position of the tail end of the scound after passing through the rolling rolls 2-1.

Similarly, holds true for the n-th stand. After the tail end of the rolled material 1 passes the (n-1)th stand, when the signal 8+2a of the pulse oscillator 8-2 reaches the pulse XIJl(kcn), the tail end of the rolled material 1 passes the Therefore, the position of the tail end of the material to be rolled 1 can be detected by having the arithmetic unit 7 perform the calculation of the above equation (3).

In the above embodiment, the detector 5. in the first stand.
6 was used, but the number of detectors may be one, and the first stand may be provided with a load cell for control.

Moreover, in the above-mentioned example row, the movement of the rolled material 1 is uJj11. Although the pulse generator 8-1.8-2 is used as a device for measuring the , other digital or analog devices may also be used.

As described above, according to the present invention, i"t is set to a value that derives the passing timing of the tail end based on the passing pattern of each rolling roll when the leading end of the rolled material passes. This has the effect of accurately and reliably detecting the position of the end.

[Brief explanation of drawings]

FIG. 1 is a structural diagram showing a conventional roll member position detection nail;
FIG. 2 is a configuration diagram showing a roll member position pushing device showing the features of this invention. 1... Rolled material, 2-1 to 2-n... Rolling roll,
3-1~3-n...-f;l, a machine, 4-1~4-
n...Relay, 5.6...Detector, 7...Calculation side id, 8-1.8-2...Pulse transmission -0 Note that in 11A, the same reference numerals indicate the same parts.

Claims (1)

[Claims] a first device that detects the timing at which the leading end of the material to be rolled is bitten in sequence by the rolling rolls of each stand arranged in a plurality of subordinate stands; and a first device that generates a signal corresponding to the rolling speed of the rolling rolls of the first stand. a second signal generator that generates a signal according to the rolling speed of the rolling roll of the final stand; a signal from the first signal generator and a timing signal from the first device; a second device for deriving a pattern in which the leading end of the material to be rolled passes through the rolling rolls of each of the stands;
a third device for detecting the timing of passing through the rolling rolls of the stand; the timing detected by the third device; the passing pattern derived by the second device; and the generation of the first and second signal generators. and a fourth device for determining the timing at which the tail end of the rolled material passes through the rolling rolls of each stand from the ratio of the signals.