JP3962229B2 - Pipe forgetting prevention system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the process of expanding a heat exchanger or a boiler, the present invention is performed in order to perform all the pipes without leakage when the same or similar processes are repeatedly executed according to the number of pipes. The judgment before and after the execution of each of the above is displayed by objective measurement values, and if there is a pipe that has forgotten the process, a warning is given to the worker, or quality assurance for the process is given to a third party. The present invention relates to a tube expansion forgetting prevention system that prevents the forgetting of the process by leaving the record for the process and allowing the management form of the process to be issued.
[0002]
[Prior art]
  Well-known heat exchangers or boilers are physically capable of exchanging heat efficiently between two fluids through a metal plate with good surface area and good thermal conductivity, while maintaining only high thermal contact. The purpose of the heat exchanger or boiler is achieved by keeping the separated state and bringing the temperature difference between the two fluids close to each other while appropriately circulating and stirring the two fluids.
  For this reason, a large number of metal pipes (hereinafter also referred to as “tubes” or “tubes”) are arranged in a cylindrical can at a predetermined interval substantially parallel to the can, First fluid, outside the tube, inside the cantwoThe fluid is in circulation.
[0003]
Here, since the efficiency of heat exchange between the first fluid and the second fluid is determined by the surface area of the tube that separates them, the tube can be made as many as possible with the finest possible inside the can body. It is a structure that increases the surface area by subdividing it.
In order to fix the multiple tubes inside the can body and to isolate the first fluid and the second fluid, a tube plate (" There is one tube sheet at each end), and both ends of the tube are fitted into the holes, and the fitting portion needs to be further expanded and sealed.
[0004]
As a means for expanding the fitting portion, a tube expansion process (hereinafter referred to as “expanding”) is performed by inserting a tube expansion tool substantially the same as the inner diameter of the tube into the tube and pressurizing the diameter in order to crimp the fitting portion. , Called "pipe expansion work" or "pipe expansion").
[0005]
However, whether it is before or after the execution of the pipe expansion work, the difference in appearance is not clearly discernible. As a result, there is a case where a failure of forgetting to execute the pipe expansion work or a double execution is caused as a result. The forgotten execution has led to a decrease in manufacturing quality or maintenance quality of the heat exchanger or boiler, and has also caused a trouble in operation of the heat exchanger or boiler.
On the other hand, in the case of the double execution, it is a wasteful work, resulting in a reduction in work efficiency.
[0006]
Accordingly, the inventors of the present application have disclosed a patent publication, Japanese Patent Application Laid-Open No. 11-1999, or. -51285 “Tube Expander”. That is, a marking felt impregnated with ink is stored on the front surface of a bearing of a tube expander (not shown), and has a marking means that can apply a mark as the operation is performed. When executed, a mark (hereinafter also referred to as “finished mark”) is attached to the end of the tube or the end of the tube sheet to prevent the operator from forgetting.
[0007]
[Problems to be solved by the invention]
However, in the case of the marking means using the above-mentioned mark, since the mark is smeared and applied as the ink dries, it becomes difficult to see, so that the work of replenishing ink to prevent it also occurs. When the replenishment amount of ink is too large, there is a problem that the ink drips. Therefore, a system for preventing tube expansion that does not use ink has been desired.
Further, in the case of the marking means using the finished mark, the quality of the workmanship is essentially dependent on the operator's solid attention, and if the finished mark is overlooked by the operator's negligence, as expected. There was a problem that quality assurance could not be obtained.
Further, a third party who is not present at the work site is desired to print out a management form or the like in writing in order to manage the process and guarantee the quality of the work.
[0008]
Therefore, the present invention does not depend on the operator's attention, and there is no additional operation procedure or work, and the pipe expansion work is executed without fail for all the pipes. An object of the present invention is to provide a process management system capable of printing out a document to be printed.
Furthermore, in order to solve this problem, the present invention aims to provide a device that can reduce the work load at a low price.
[0009]
[Means for Solving the Problems]
  In order to achieve the above-mentioned object, the invention according to claim 1 is the tube sheet surface that covers the end surfaces of the plurality of tubes disposed inside the heat exchanger or the boiler.
  A sensor for measuring the position of a tube expansion tool for expanding a tube in order to connect a tube to the hole in the tube sheet surface,
  Recording / reproducing means for recording and reproducing the position information of the tube expansion tool obtained from the sensor;
  Display means for displaying the position information on a drawing and / or a form;,
The sensor measures the position of the tube expansion tool according to a reverse rotation command when the tube expansion tool is reversely rotated and extracted,
Collating this measured position information with the position data of the plurality of tubes acquired in advance by the recording / reproducing means,If any of the pipes can be specified, the pipe is processed as having been expanded, and if not specified, digitizing means for outputting a digitized signal so as to be processed as unexpanded work;
  A process management means for clearly indicating, for each of the tubes, whether the tube expansion operation is performed before or after the end view or the layout view of the entire tube by the display unit;
  Equipped with.
[0010]
Since it did in this way, in order to pinpoint the position of the said pipe where the said pipe expansion tool performed the pipe expansion operation with respect to the several pipe | tube arrange | positioned at a heat exchanger or a boiler, on the layout drawing which covers the said some pipe | tube , The position information of the tube expansion work tool obtained from the sensor can be measured and output by the sensor, and the recording of the position information can be held by the recording / reproducing means, so that it can be reproduced in a timely manner and displayed on the display means on a drawing or form.
Therefore, if there is a leak in the tube expansion work for the plurality of tubes, it can be promptly warned.
In addition, the drawings and forms can be left as evidence as process management records.
As a result, a warning about forgetting the tube expansion work can be displayed, so that the forgetting the tube expansion work can be prevented.
[0012]
In this manner, since the digitized signal is output by determining whether the tube expansion work is performed before or after, effective process management can be performed without requiring the attention to read the measurement value of the sensor. In addition, the display means clearly shows, for each pipe, whether the pipe expansion work is performed before or after the end view or the layout drawing which clearly distinguishes the plurality of pipes arranged in the heat exchanger or the boiler. It is easier to see and understand.
[0013]
  Also,Claim 2According to the invention, a scanning laser distance measuring device is provided as the sensor. This scanning laser distance measuring device can achieve the purpose by operating with high precision and high speed for a small size, light weight, simple and inexpensive, so that effective process management can be performed quickly, accurately and easily.
[0014]
  Also,Claim 3The invention according to the present invention includes a control unit that causes the sensor to measure and output the position information at the time when the tube expansion tool is performing a tube expansion operation or for each tube, and the measured numerical value of the sensor is displayed in the end view or the layout diagram. Image display means is provided for collating, and if there is the tube corresponding to the collated position information, clearly indicates the tube.
[0015]
In this way, when the measured numerical value of the sensor is collated with an end view or layout drawing that clearly distinguishes the tubes, the position where the tube expansion work tool is inserted into the corresponding tube is identified and identified. It can be proved that the pipe expansion work has been completed for the pipe in the specified position.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is an actual layout diagram showing an embodiment of the present invention, and shows, for example, a configuration of a heat exchanger or boiler 20 forgetting tube expansion forgetting prevention system (hereinafter referred to as “the present system”) 10. A large number of metal tubes 1, 2 to n (n not shown) for heat exchange are provided in the vicinity of both ends of the heat exchanger or boiler (hereinafter also referred to as “work”) 20. Each is inserted into holes 11, 12,..., N drilled in a disk-shaped tube sheet 40, and is held tightly.
[0017]
In order to show the configuration of the system 10, the tube plate 40 is viewed from the tube end direction of the cylindrical can, and the holes 11, 12,... -N in the tube plate 40 and the tubes 1, 2 inserted into them are inserted. , ˜n are represented on the orthogonal coordinates of the X axis and the Y axis.
[0018]
The main part of the system 10 is the position of the tube expansion tool and its controller (hereinafter abbreviated as “tube expansion tool”) 13 on the plate surface of the tube plate 40 that covers the end surfaces of the tubes 1, 2,. Is composed of an infrared laser scanner, which is a kind of scanning laser distance measuring device, a personal computer 15, a printer 16, and a display 17, and other devices are connected to the personal computer 15. Each type is connected by a dedicated interface cable. The sensor 14 is connected from the sensor 14, the pipe expanding tool cable 19 is connected from the pipe expanding tool 13, and the printer 16 and the display 17 are connected by a well-known general-purpose cable. is there. With these configurations, it is possible to achieve prevention of forgetting the tube expansion work, which is an object of the present invention.
The operation will be described below.
[0019]
FIG. 2 is an explanatory diagram regarding the position measurement function of the infrared laser scanner, assuming that the tube expansion tool 13 is at the position n, and is reflected by the center of a rotating mirror wheel (not shown) of the sensor 14. Then, there are two-dimensional coordinate X-axis and Y-axis for displaying the position with the center position of the projected light as the origin 0. In accordance with FIG. 1, the coordinate axis is set so that the 9 o'clock position of the timepiece is the starting point of the rotation angle 0 °, and the infrared laser beam is scanned counterclockwise at the rotation angle α.
Here, the general specifications of the sensor 14 are as follows.
(1) Scanning angle: 180 degrees
(2) Scanning time: Up to 52ms
(3) Scanning distance: Up to 4m
[0020]
Further, from the sensor 14, a distance measuring infrared laser beam whose rotation angle α is controlled by a rotating mirror (not shown) whose angle is precisely controlled, and the numerical value of the rotation angle α and the tube from the origin 0 are expanded. A linear distance L up to n where the tool 13 is located is output, and accordingly, a coordinate numerical value by a function calculation function of X = L cos α, Y = L sin α is also output. The operation principle of the distance measuring function for obtaining the straight line distance L to the object by the laser distance measuring device is a well-known technique and will not be described.
[0021]
Therefore, it has a position measuring function over a semicircular range with a radius of 4 m centering on the origin 0, and can scan once within 52 ms. In other words, even if the measurement object in the measurement range is a moving object, if it is necessary to trace the trajectory in a moving image, the latest position of the moving object can be captured with a reliability of about 20 times per second. Display is also possible. In other words, it can also function as if it were a simplified raster scan TV camera.
[0022]
Here, if the trajectory of the tube expansion tool 13 that moves in accordance with the tube expansion work is traced in a moving image, the whole of the tube expansion operation can be monitored and checked as if it were a video. However, the difference from video shooting is that a check is performed in accordance with the check items for whether or not the pipe expansion work has been executed for all the pipes 1, 2,... The result can be notified to the worker.
[0023]
As described above as the basic principle of the system 10, if the position moved by using the tube expansion tool 13 can be captured as a trajectory, the tube expansion work has been performed among the tubes 1, 2,. You can clearly distinguish things. This is because the pipe expansion tool 13 is always in contact with the pipe that has been subjected to the pipe expansion work, so it should exist on the trajectory, and conversely, if the pipe expansion does not exist on the trajectory, it can be determined that the pipe has not been executed.
In addition, the timing of completion of the execution of the pipe expansion work is performed after the pipe expansion work drive machine (also called “tube expander” in other published patent publications) by a hydraulic control mechanism (not shown) expands the pipe. When the tube expansion work is completed by reversing it, a switch (not shown) provided in the tube expansion drive is automatically turned on to operate the sensor 14 at an appropriate timing.
[0024]
Then, the position measurement operation is automatically instructed to the sensor 14 at the timing when the execution of the pipe expansion work is completed, and the position of the pipe expansion tool 13 is specified. That is, the pipe expansion work of the pipes 1, 2, to n is performed by the normal rotation of the pipe expansion tool 13, and when the pipe expansion work is completed, the pipe expansion tool 13 is rotated in the reverse direction and the pipe expansion tool 13 is extracted. The sensor 14 is instructed to perform a position measurement operation using the reverse rotation command at that time.
It should be noted that the position measurement operation may be commanded to the sensor 14 with both forward rotation and reverse rotation. If so, a higher assurance that the pipe where the pipe expanding tool 13 is located has performed the pipe expanding operation can be obtained.
[0025]
The position information of the tube expansion tool 13 obtained from the sensor 14 is recorded as numerical data by XY coordinate values, and there is a personal computer 15 as recording / reproducing means for reproducing. As is well known, the personal computer 15 has a necessary and sufficient function for recording and reproducing numerical data, and as a display means for displaying the position information in drawings and / or forms, a display screen (see FIG. 3) or a printer 16 that is connected to the personal computer 15 and appropriately printed out.
[0026]
  FIG. 3 is an explanatory diagram showing a personal computer screen according to the present system 10. As shown in the upper left of the personal computer screen 21, the system 10 is commercialized under the name "tube expansion work support system". As shown on the left side of the personal computer screen 21, approximately three-quarters are processes related to the placement images 31, 32 to 30 N (30 N not shown) corresponding to the holes 11, 12 to N (see FIG. 1).PipeFIG.
[0027]
Further, 1235 in the X coordinate numerical display 22 and 1123 in the Y coordinate numerical display 23 are the position information of the tube expanding tool 13 on the XY coordinate axis described with reference to FIG. Also, the pipe number display 24 has # 0111 as the management number # 0111 on the original layout diagram (which may be referred to FIG. 4) corresponding to the holes 11 and 12 to N. This indicates that the pipe expansion work is being executed, and this number does not necessarily mean that the pipe expansion work is being executed 111th.
[0028]
Furthermore, 125/1450 in the progress status display 25 is 1, 2, to n for a total of 1450 pipes, and the status of the 125th pipe # 111 currently being executed according to the progress of the pipe expansion work. Is plotted (projected) in the process control diagram 30.
Here, the present system 10 outputs a digitized signal such as binarization by determining whether it is before or after execution of the tube expansion work, so that the operator can read the measured numerical value of the sensor. Effective process management without the need for
In addition, the process control chart 30 is an end view or layout diagram for clarifying the distinction between a plurality of pipes 1, 2,... Since it is clearly indicated, it is easy to see and understand.
In this way, the color of the corresponding part on the personal computer screen 21 is colored from gray to red, for example, as the above-mentioned mark.
[0029]
The initialization button 26 is used when starting a tube expansion work for a new work 20 having no work history. As will be described later, the interrupt button 27, the end button 28, and the print button 29 are mouse clicked as necessary.
[0030]
Furthermore, in the case of the present system 10, it is necessary to input data composed of the arrangement images 31, 32, to 30N relating to the holes 11, 12 to N of the workpiece 20 in advance as image data or text data, thereby drawing the data. The image data of the process management chart 30 thus corrected is corrected by 0 point at an arbitrary pipe expansion work position, and the execution state of the pipe expansion work is plotted against it.
[0031]
And if any one of the arrangement images 31, 32, to 30N of the plurality of pipes in the process control diagram 30 can be specified by the measured numerical value output from the sensor 14 in accordance with the execution of the pipe expansion work, the pipe has been expanded. For example, a digitizing means for outputting a digitized signal that clearly distinguishes, for example, a tube that is colored red and is not specified as such, is binned so that it is regarded as unexpanded and uncolored. Yes, when the operator thinks the end, if there is any unexpanded work, a warning to that effect is given.
For example, a warning can be easily implemented by displaying “unfinished message” (not shown) on the personal computer screen 21 and sounding various warning sounds by controlling the digitized signal.
[0032]
Thus, the end view (plate surface of the tube plate 40) or the arrangement images 31, 32, to 30N (30N not shown) equivalent to the entire view of the entire target tube by the display means including the personal computer screen 21. For each of the above, the location where the pipe expansion work has been performed is determined for each pipe so that the measurement output from the sensor 14 can be binarized and distinguished by computing the measurement output from the sensor 14 before or after the pipe expansion work. The progress of the work is clearly shown in different colors.
In addition, from the personal computer screen 21 shown in FIG. 3, one-fourth or less of the end view of the entire target tube is displayed, but this is due to restrictions on the screen size of the personal computer screen 21. Yes, it is possible to freely perform “entire display”, “partially enlarged display”, and “move the enlarged range up / down / left / right” by operating a display range switching button (not shown) or a known scroll button.
[0033]
FIG. 4 is an example of an output form of a work report (quality assurance document) by this system, and the contents are as follows.
(1) Work name: Condensate No. 1
(2) Work day: August 1, 2000
(3) Worker: Taro Sugino Heat Exchange Maintenance Co., Ltd.
(4) Work result: As shown in the process control chart below, we report that pipe expansion work has been performed without omission on all pipes from # 1 to # 1450, and guarantee the quality of work results. (Note that for the report that all pipes have been expanded without omission, the process control chart may be omitted from this work report, but the quality assurance effect in that case is also the process control chart. (It is the same as when there is an attachment.)
[0034]
FIG. 5 is a flowchart for explaining the operation of the system 10.
Note that the operator can turn on the power of the personal computer 15 before starting the pipe expansion work, the program of the system 10 has already been started up, and the sensor 14 is attached to an appropriate position of the workpiece 20 and measurement is possible. A description will be given on the assumption that the standby state is established.
In addition, as an initial setting, the mounting position and direction of the sensor 14 are input. By doing so, the XY coordinate axes described in FIG. 2 are established.
As shown in FIG. 1, the sensor 14 having a scanning angle of 180 degrees covers all the tubes 1, 2 to n within the scanning range unless they are mounted on a plate surface near the circumference of the tube plate 40. For example, if it is a 360 degree sensor, it is not necessary to be near the circumference if it is on the surface of the tube sheet 40.
[0035]
First, starting with a code and name (hereinafter referred to as “work name”) for identifying the work 20, work date, worker name, customer name, etc., and layout drawing data regarding the holes 11, 12 to N of the work 20. There is a step 1 (hereinafter referred to as “Sl”) in which the operator inputs these attribute information.
In particular, in order to show the state of the pipe expansion work and the display of the result (see FIG. 3), the center coordinates with respect to the end faces of the pipes 1 and 2 to n or the holes 11 and 12 to N (see FIG. 1) of the workpiece 20 are set. For all the pipes, a CSV format file described with their pipe numbers # 1 to # 1450 (see FIG. 4), that is, a text file in which data is separated by commas is created by Excel or the like.
This attribute information is described (see FIG. 4) in the work report (quality assurance document) printed out as the final output of the system 10 (see FIG. 4), and is also interrupted when the work 20 is expanded after being suspended. This is convenient because the process management information up to the end is recorded and used as a memorandum for the worker, and is reproduced and used when the work is resumed.
[0036]
Next, pipe expansion work was performed on the pipe farthest from the sensor 14, and the pipe No. For example, # 1450 is input (S2). Then, the execution status of the tube expansion work is plotted on the process management chart 30 of the personal computer screen 21. This plot is executed semi-automatically by the software.
Next, the pipe 14 was expanded from the sensor 14 to the pipe at the nearest position. For example, # 0001 is input (S3). The arrangement drawing is corrected by 0 point (S4) at any tube expansion work position. Here, the zero point correction (S4) is executed by the software manually or semi-automatically by the operator.
Then, the tube expansion work is performed as appropriate according to the convenience of the work, and an image of the progress is formed (S5). The progress image is automatically formed (S5).
Also, when the expansion operation is interrupted by the operator's intention, the interruption button is pressed (S6), and the operation ends. Therefore, the progress image and other status data are saved in a disk file (S7), Exit the program.
[0037]
Then, in order to resume the interrupted work, when the program is started, the interrupted status data may be called by the work name or the like. If another interrupt work is not inserted until the interrupted work is restarted, the interrupted status data is automatically called, and the previously interrupted status is reproduced to be in a continuation state.
[0038]
When the end button of the system 10 is pressed (S8), the system 10 confirms whether there is an unworked part (S9). The specific contents of this step will be described later.
Here, if the end work cylinder is warned by the system 10 by visual confirmation of the end-colored arrangement image, the “incomplete message” (S12), a warning sound, or the like, the process returns to (S5). Then, while the worker sees the progress image, the remaining tube expansion work is completed. On the other hand, if there is no unworked part, the data is saved (S10), the work report (quality guarantee) is printed out (Sll), and the work is finished.
[0039]
Although not shown in FIG. 5, a past work report (quality assurance document) can be printed out by pressing the print button 29 (see FIG. 3). In that case, the data may be called by the work name or the like. However, a description of a specific switching screen diagram and program for that purpose will be omitted.
[0040]
The gist of the present invention is that the position information of the tube expansion tool obtained from the sensor is measured and output by the sensor, and the recording of the position information can be held by the recording / reproducing means, so that it is reproduced in a timely manner, and the display means is displayed on the drawing or form. By displaying it, it is possible to warn of forgetting the tube expansion work and to prevent forgetting the tube expansion work.
Therefore, as long as the gist of the present invention is included, the program of the personal computer and the connection mode of the printer are included in the present invention in any state.
[0041]
For example, a dedicated program may be installed in a general-purpose personal computer, and the tube expansion tool and sensor output may be LAN-connected, or a dedicated machine including a printer may be integrated. In addition, the infrared laser scanner used in this system 10 is about the size of a human palm. However, if there is a smaller, lighter, cheaper and higher-performance ranging sensor, it is not necessary to be an infrared laser scanner. , You may use it.
In the present embodiment, the workpiece 20 is defined as a heat exchanger or a boiler. However, this is an example, and the combustion gas is passed through a smoke pipe to a condenser or the like that mainly handles cold water and steam. This is because even a locomotive boiler that uses a boiler is included in the application object of the present invention.
Alternatively, the boiler may be defined as a kind of heat exchanger.
[0042]
【The invention's effect】
As described above, according to the first aspect of the present invention, a plurality of pipes arranged in a heat exchanger or a boiler are identified with respect to a plurality of pipes that have been subjected to pipe expansion work by a pipe expansion tool. The position information of the expansion tool obtained from the sensor is measured and output to the sensor on the layout drawing that covers the entire tube, and the recording of the position information can be held by the recording / reproducing means, so that it is reproduced in a timely manner. Can be displayed.
[0043]
Therefore, if there is a leak in the tube expansion work for the plurality of tubes, it can be promptly warned. In addition, drawings and forms can be left as evidence as process management records. As a result, a warning about forgetting the tube expansion work can be displayed, so that it is possible to prevent forgetting the tube expansion work.
[0044]
  Also,Since it is determined whether the pipe expansion work is performed before or after it is output, a digitized signal is output, so that effective process management can be performed without requiring the attention to read the measured value of the sensor. In addition, since the display means clearly shows the distinction before or after the execution of the pipe expansion work in the end view or the layout drawing that clearly distinguishes the plurality of pipes arranged in the heat exchanger or the boiler, It becomes easy to see and understand.
[0045]
  Also,Claim 2According to the invention, the scanning laser distance measuring device can achieve the purpose by operating with high accuracy and high speed for small size, light weight, simple and inexpensive, so that it is possible to perform effective process management quickly and accurately. .
[0046]
  Also,Claim 3According to the invention according to the present invention, the pipe into which the pipe expanding tool is inserted is identified by collating the position information indicated by the measured value of the sensor with the end view or the layout drawing that makes the pipe distinction clear, and the identified pipe expanding It can be proved that the pipe expansion work has been completed.
[Brief description of the drawings]
FIG. 1 is an actual arrangement diagram showing an embodiment of the present invention.
FIG. 2 is an explanatory diagram regarding a position measurement function of an infrared laser scanner.
FIG. 3 is an explanatory diagram showing a personal computer screen according to the present system 10;
FIG. 4 is an output form of a work report (quality assurance document) by this system.
FIG. 5 is a flowchart for explaining the operation of the system.
[Explanation of symbols]
1, 2, to n tubes
10 Pipe expansion work forget prevention system
11, 12, ... N holes
13 Tube expansion tool and its controller
14 sensors
15 PC
16 Printer
17 Display
18 Sensor cable
19 Tube expansion tool cable
20 Heat exchanger or boiler (work)
21 PC screen
22 X coordinate numerical display
23 Y coordinate value display
24 Piping number display
25 Progress display
26 Reset button
27 Stop button
28 Exit button
29 Print button
30 Process control chart for holes 11, 12 to N
31, 32, to 30 N Arrangement images corresponding to holes 11, 12 to N
40 Tube sheet
O The origin of two-dimensional coordinates, that is, the projection center position of the reflected light from the center of the rotating mirror wheel of the sensor 14
X, Y X and Y axes of two-dimensional coordinates
α rotation angle

Claims (3)

In the tube sheet surface that covers the end surfaces of a plurality of tubes disposed inside the heat exchanger or boiler,
A sensor for measuring the position of a tube expanding tool for expanding a tube in order to connect a tube to the hole in the tube sheet surface; and
Recording / reproducing means for recording and reproducing the position information of the tube expanding tool obtained from the sensor;
Display means for displaying the position information on a drawing and / or a form ;
The sensor measures the position of the tube expansion tool according to a reverse rotation command when the tube expansion tool is reversely rotated and extracted,
The measured position information is compared with the position data of the plurality of pipes acquired in advance by the recording / reproducing means, and if any of the pipes can be specified, the pipe is processed as having been expanded and specified. Digitizing means for outputting a digitized signal to be processed as unexpanded work if not possible,
A process management means for clearly indicating, for each of the tubes, whether the tube expansion operation is performed before or after the end view or the layout view of the entire tube by the display unit;
A forget-to-expand system for preventing expanded pipes. 2. The tube expansion forgetting prevention system according to claim 1, further comprising a scanning laser distance measuring device as the sensor. The control means for causing the sensor to measure and output the position information at the time when the pipe expanding tool is performing the pipe expanding work or for each pipe, and the measured numerical value of the sensor are collated with the end view or the layout drawing. 3. An expansion forgetting prevention system according to claim 2 , further comprising image display means for clearly indicating the expansion of the pipe corresponding to the position information.

Images