JP2915514B2 - Wave shape continuous recording device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a corrugated continuous recording device for recording corrugated bellows such as corrugated tubes.

(Prior art) Conventionally, in a corrugation forming apparatus that performs corrugation, a band-shaped metal is formed into a cylindrical shape, and then a seam is welded with a welding machine, and then the cylindrical member is corrugated with a corrugator and continuously formed. A corrugated pipe having a corrugated shape is formed, and the appearance monitoring of the processed corrugated shape to see if any abnormalities such as crushing or buckling have occurred. I went continuously.

(Problems to be Solved by the Invention) However, in the above-described corrugated pipe forming apparatus, the corrugated pipe corrugated pipe was visually monitored by the operator during the formation of the corrugated pipe. However, there is a problem that work efficiency is poor because of the need for a worker who performs the monitoring, and that the waveform is not recorded because the monitoring is performed visually.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and enables the outer diameter of a detected cylindrical member to be recorded, thereby eliminating the need for a skilled worker for monitoring a wave shape to monitor and record a wave forming process. It is an object of the present invention to provide a continuous waveform recording device that can be easily performed.

(Means for Solving the Problems) According to the present invention, in order to achieve the above object, in a corrugated forming apparatus for corrugating a cylindrical member to form a corrugated cylindrical member, Outer diameter measuring means for measuring the outer diameter of the cylindrical member, comparing means for comparing the measured value of the measured outer diameter with a set value of the set outer diameter to obtain a deviation thereof, and the obtained outer diameter Recording means for recording the deviation amount of the outer diameter on recording paper, and recording speed changing means for changing the feed speed of the recording paper on which the deviation amount of the outer diameter is recorded at predetermined intervals.

(Operation) The deviation between the measured value of the outer diameter of the cylindrical member measured by the measuring means and the set value is recorded by the recording means on recording paper conveyed at different feeding speeds at predetermined intervals.

Therefore, the operator can easily detect abnormalities in the waveform by checking the recording paper on which the outer diameter of the waveform is recorded, and also eliminate the need for a skilled operator for monitoring.
The wave shape can be recognized accurately and easily.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 7.

FIG. 1 is a schematic configuration diagram of a waveform forming apparatus using the continuous waveform recording apparatus according to the present invention. In the figure, the strip-shaped metal 11 is conveyed by a conveying roller 12, and after being formed into a cylindrical shape, a seam is welded by a welding machine 13, and thereafter,
The formed cylindrical member 14 is corrugated by a corrugator 15 to form a corrugated tube 16 having a continuous corrugated shape.

Further, the continuous wave shape recording device according to the present invention is a
Pulse generator 21 that generates a pulse according to the movement of 11
And the pulse from the pulse generator 21
A counter circuit 22 for detecting the moving distance of 11 and an outer diameter measuring device 23 installed on a table whose tilt can be adjusted in accordance with the corrugated shape so that the corrugated tube 16 formed can be accurately measured. A wave shape abnormality discriminator 24 that determines an abnormality according to the deviation of the outer diameter measured by the outer diameter measuring device 23, and a recording paper (chart) according to the deviation of the outer diameter measured by the outer diameter measuring device 23. ) Records the waveform of the above deviation, and changes the chart feed speed according to the predetermined count value of the counter circuit 22 and the abnormality determination result of the waveform abnormality determiner 24.
It is composed of

The pulse generator 21 is connected to the transport roller 12 and receives an encoder 21a that rotates in synchronization with the transport roller 12, and a sensor 21b that detects the rotation of the encoder 21a and outputs a pulse signal corresponding to the rotation. Has become.

Two count values are preset in the counter circuit 22, and when the count value reaches a first preset value (preset 1), the relay circuit Ry1 is excited via the switch Ry2a in the ON state, and the count value is reset. Reaches the second preset value (preset 2), the relay circuit Ry
2 to excite switch Ry2a to off state,
The switch Ry2b for resetting the counter circuit 22 is turned on.

The outer diameter measuring device 23 has a configuration as shown in FIG. 2, in which a laser beam emitted from a laser oscillator 23a is scanned and reflected by a rotary polygon mirror 23b, and then the laser beam is
Then, the light is converted into a parallel light beam having the width of the measurement area by the concave mirror 23d, and is irradiated to the corrugated tube to be measured. The laser beam that has scanned the corrugated tube is reflected and condensed by the concave mirror 23e, converted into an electric signal corresponding to the brightness of the light by the photodiode 23f, and taken into the CPU 23g. The CPU 23g calculates the time during which the shadow is generated in the measurement area according to the captured electric signal, and calculates the peak, which is the outer diameter of the corrugated tube, from the time during which the shadow is generated, the length of the measurement area, and the scanning time. And the valley portion are calculated. Further, the CPU 23g compares a preset set value which is a reference for the corrugated pipe peaks and valleys with the calculated outer diameter of the corrugated pipe, and outputs a deviation as a result of the comparison. Shape abnormality discriminator 24 and recorder 25
Output to The deviation data output to the wave shape abnormality classifier 24 is, for example, as shown in FIG. 3, when the deviation at the peak is within the range of the upper and lower limits and the deviation at the valley. Is represented by a combination of binary data of "1" when the value is within the range of the lower limit and the lower limit, and "0" otherwise (see FIG. 4). 3 (a) and 3 (b) show deviations when the wave shape is normal, and FIGS. 3 (b) and (c) show deviations when the wave shape is abnormal such as crushing or buckling. In addition, the deviation when the wave shape is abnormal is also considered in the case where the peak of the wave exceeds the upper limit or the trough of the wave exceeds the lower limit, In this case, "1" or "0" is continuously displayed as in the case of the abnormal waveform shapes shown in FIGS. 4 (b) and 4 (c). Further, the deviation data output to the recorder 25 is an analog value corresponding to the difference between the set value and the actually measured value, for example, the difference ±
10 [mm] is converted into an analog value of ± 10 [V] DC and output.

The wave shape abnormality discriminator 24 has a memory 24a such as a RAM for storing the deviation data taken from the outer diameter measuring device 23, and the data stored for each of the upper limit and the lower limit is “0”,
An abnormal wave shape is detected by judging whether or not the data is "1" alternately continuous data. When an abnormality in the waveform is detected, the relay circuit Ry3 is excited, and an alarm signal notifying the occurrence of the abnormality is output to the alarm generator 24b to urge the generation of an alarm.

The recorder 25 has a motor 25b that operates a pen that records the deviation between the set value of the waveform and the measured value, and the motor drive circuit 25a converts the deviation data of the analog value input from the outer diameter measuring device 23 into data. The motor 25b is driven accordingly, and the deviation between the set value and the measured value is recorded in a chart (not shown). Also,
The recorder 25 is a motor 25d that conveys the chart at a predetermined speed.
The motor drive circuit 25c includes a switch Ry1 and a switch Ry1.
When both Ry3 are off, the motor 2
Rotate 5d to convey the chart and relay circuit Ry1
Alternatively, when either switch Ry1 or Ry3 is turned on by excitation of Ry3, chart 25 is conveyed by rotating motor 25d at a predetermined high speed. That is, even when the predetermined time preset in the counter circuit 22 has been reached, or when an abnormality has occurred in the waveform, the recorder 25 performs chart conveyance at a high speed to expand the time axis and set the set value. And the deviation of the measured values are recorded in the chart.

Next, the operation of the corrugated tube wave shape abnormality determination according to the present invention will be described with reference to the flowcharts of FIGS.

First, as shown in FIG. 5, initial values such as a set value serving as a reference for the outer diameter of the corrugated pipe and upper and lower limits of the deviation, upper and lower limits, and lower and lower limits are reset (step 10).
1) Input the wave pitch to be measured (step 102). Next, the CPU 23g determines whether the input value of the wave pitch is normal from the pulse signal of the pulse generator 21 and the wave pitch (step 103).

Here, if the input value of the wave pitch is abnormal, an input abnormal indicator (not shown) is turned on (step 104).
Returning to step 102, the wave pitch is input. If the input value of the wave pitch is normal, the input abnormality indicator is turned off (step 105), and it is determined whether or not the monitoring start switch of the wave shape abnormality classifier 24 is on (step 10).
6).

If the monitoring start switch is off, the process returns to step 102 to input a wave pitch. Also, when the monitoring start switch is on, whether the moving distance of the corrugated pipe has reached the distance of (wave pitch) / 2, that is, the corrugated pipe has changed from the peak to the trough or from the trough to the peak. It is determined whether it is (Step 107).

If the moving distance is not (wave pitch) / 2, the process returns to step 106 to determine whether the monitoring start switch is on or off. The moving distance is (wave pitch)
If the value is / 2, the latest deviation data (upper and lower present results) stored in the memory 24a is stored as the previous result data (step 108), and the outer diameter measuring device 23
The new deviation data (upper and lower current results) fetched from the memory 24a are stored in the memory 24a as the present result data (step 109). Then, in FIG. 6, it is determined whether or not the deviation data has been fetched twice or more (step 110).

If the deviation data has not been acquired twice, the process returns to step 106 to determine whether the monitoring start switch is on or off. When the deviation data is taken in two or more times, it is determined whether or not the data of the previous result of the upper limit and the lower limit is the same as the data of the current result of the upper limit and the lower limit (steps 111 and 112). That is, if the wave shape is normal,
As shown in FIG. 4 (a), the deviation data is “0” and “1” alternately successively. However, when the wave shape is abnormal, as shown in FIGS. 4 (b) and 4 (c). In addition, since "0" or "1" appears continuously in the deviation data, an abnormality in the waveform can be detected by judging the continuity of the deviation data.

Here, if any of the upper limit and lower limit data of the current result and the previous result is the same, it is determined that an abnormality has occurred in the waveform, the relay circuit Ry3 is excited, and the switch Ry3 is turned on. As shown in FIG. 7, a chart fast-forward output process for recording with the chart time axis enlarged by increasing the chart conveyance speed is performed (step 11).
3) An alarm is output (step 114) to issue an alarm and notify the abnormality of the wave shape. If the data of the present result is different from the data of the previous result, the process returns to step 106 to determine whether the monitoring start switch is on or off, and fetch the next deviation data.

Therefore, in the present invention, when an abnormality occurs in the corrugated tube at a predetermined moving distance or in the corrugated shape of the corrugated tube, the conveying speed of the chart is increased, and as shown in FIG. The axis is enlarged, and the deviation of the outer diameter of the corrugated pipe can be easily recorded on the chart, and an alarm can be issued when an abnormality occurs, so that the waveform of the corrugated pipe can be recorded and recorded. Even if it is not an operator, it is possible to recognize the abnormality of the wave shape.

In the above embodiment, the feed speed of the recording paper on which the deviation amount of the outer diameter of the corrugated tube is recorded is changed at predetermined intervals, and even when an abnormality occurs in the wave shape of the corrugated tube, Although the feed speed of the recording paper is changed, the present invention is not limited to this, and it is also possible to change the feed speed of the recording paper only at predetermined intervals, or only when an abnormality occurs in the wave shape of the corrugated tube. It is of course possible to change the recording paper feed speed.

(Effects of the Invention) As described above, according to the present invention, in a corrugated shape forming apparatus for corrugating a cylindrical member to form a corrugated cylindrical member, the outer diameter of the corrugated cylindrical member is measured. Outer diameter measuring means, comparing means for comparing the measured value of the measured outer diameter with the set value of the set outer diameter to obtain a deviation thereof, and calculating the deviation amount of the obtained outer diameter on a recording sheet. Recording means for recording, and a recording speed changing means for changing the feeding speed of the recording paper on which the deviation amount of the outer diameter is recorded at predetermined intervals, so that a skilled operator for monitoring the waveform is unnecessary. Monitoring and recording of the corrugating process can be easily performed.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a schematic configuration of a waveform forming apparatus using a continuous waveform recording device according to the present invention, FIG. 2 is a configuration diagram showing a configuration of an outer diameter measuring device shown in FIG. 3 and 4
FIGS. 5A and 5B are diagrams showing waveforms indicating the deviation and binary data, FIGS. 5 and 6 are flowcharts for explaining the operation of the waveform shape abnormality determination, and FIG. 7 is a waveform diagram showing the deviation recorded in the chart. is there. 13 ... Welding machine, 15 ... Corrugator, 16 ... Corrugated pipe (with corrugation), 21 ... Pulse generator, 22 ... Counter circuit, 23 ... Outer diameter measuring instrument, 24 ... Wave shape abnormality discriminator ,twenty five…
... recorded form.

Claims (3)

(57) [Claims] 1. A corrugation forming apparatus for corrugating a cylindrical member to form a corrugated cylindrical member, comprising: an outer diameter measuring means for measuring an outer diameter of the corrugated cylindrical member; Comparing means for comparing the measured value of the outer diameter with the set value of the outer diameter to determine the deviation, recording means for recording the deviation amount of the determined outer diameter on recording paper, A recording speed changing means for changing a feeding speed of the recording paper on which the deviation amount is recorded at a predetermined interval; 2. A corrugation forming apparatus for corrugating a cylindrical member to form a corrugated cylindrical member, comprising: an outer diameter measuring means for measuring an outer diameter of the corrugated cylindrical member; Comparing means for comparing the measured value of the outer diameter with the set value of the outer diameter to determine the deviation, recording means for recording the deviation amount of the determined outer diameter on recording paper, First recording speed changing means for changing the feeding speed of the recording paper on which the deviation amount is recorded at a predetermined interval, and judging abnormalities in the waveform of the formed cylindrical member according to the deviation of the obtained outer diameter. A continuous wave shape recording apparatus comprising: a wave shape discriminating means; and a second recording speed changing means for changing a feeding speed of a recording sheet according to a result of the discrimination. 3. A corrugation forming apparatus for corrugating a cylindrical member to form a corrugated cylindrical member, comprising: an outer diameter measuring means for measuring an outer diameter of the corrugated cylindrical member; Comparing means for comparing the measured value of the outer diameter with the measured value of the set outer diameter to obtain a deviation thereof; recording means for recording the deviation amount of the obtained outer diameter on a recording sheet; Wave shape determining means for determining the abnormality of the wave shape of the formed cylindrical member by determining the continuity of the deviation of the diameter,
And a recording speed changing means for changing a feed speed of the recording paper in accordance with a result of the determination.