JP6493340B2 - Steel pipe maintenance guidance system - Google Patents

Description

  The present invention relates to a steel pipe rod care guidance system applied to a steel pipe manufacturing process comprising a flaw detection process for flaw detection on the surface of a steel pipe and a care process for removing flaws on the surface of the steel pipe after the flaw detection process.

  In the flaw detection process of the steel pipe manufacturing process, when a flaw is automatically detected by the surface flaw detection device, automatic marking is performed on the periphery (approximately within 100 mm). The mark by this automatic marking only specifies the position in the pipe length direction, and does not specify the position in the pipe circumferential direction. “Surface” means a surface on the outer diameter side (the same applies hereinafter).

A maintenance operator (hereinafter, simply referred to as an operator) generally looks at the mark and polishes the area around the mark with a manual sander or the like. This is called a conventional care method.
The size of the ridge is about 10 mm to 50 mm in length and about 0.3 mm to 2.0 mm in depth.

  In addition, there is also a proposal of a surface wrinkle care device in which wrinkle care work is three-dimensional so that wrinkle inspection and care can be performed at the same position (see Patent Document 1). However, the maintenance work itself by the operator is the same as the conventional care method.

JP 2002-028724 A

However, the operator rotates the steel pipe in the pipe circumferential direction at the marked position in the pipe circumferential direction, and visually identifies a narrow range that seems to be a flaw. In many cases, wrinkles are detected again at the same position by the surface re-detection after the cleaning, and therefore, the re-care (re-care) is often required. On the contrary, some of the items that have been cared for may grind an unnecessarily wide area, which is a factor that steadily deteriorates the yield.
On the other hand, polishing the entire surface degrades the economics of lead time and yield.

  It should be noted that the operator has information on the exact position, depth, and length of the heel (hereinafter, the heel length and the heel depth are collectively referred to as “the degree of heel”. As long as you know the 疵 information ”), you have mastered the skill that can be maintained without excess or deficiency, but currently there is no means to inform the operator of accurate 疵 information. Excessive care may occur.

  In view of the above-described circumstances, an object of the present invention is to provide a steel pipe rod maintenance guidance system that informs an operator during the maintenance operation of information on the exact position, length, and depth of the rod.

The present invention that has achieved the above object is as follows.
(1) A steel pipe rod care guidance system for a steel pipe manufacturing process, comprising a flaw detection step for flaw detection on the surface of a steel pipe, and a care step for scraping off flaws detected in the flaw detection step,
A hail map information storage that is a means for accumulating information on hull positions in the pipe length direction and pipe circumferential direction, and hull length and hull depth for each hull position, which is hail map information for each steel pipe number acquired in the flaw detection process. Means,
From the accumulated map information for each steel pipe number, the map information extracting means is a means for extracting the map data corresponding to the specified steel pipe number by designating the steel pipe number,
疵 which is a means for displaying the information on the corresponding heel length and heel depth at each heel position specified by the heel map information of the steel pipe of the specified steel pipe number using the extracted heel map information A steel pipe rod maintenance guidance system comprising map information display means.
(2) In the above (1), a steel pipe rod comprising means for specifying a tool position of a care tool used in the care step and means for detecting coincidence between the tool position and the rod position Care guidance system.
(3) The steel pipe rod maintenance guidance system according to (2), wherein the care tool is an automatic care tool.

  According to the present invention, the operator can know the exact position, length and depth of the heel during the cleaning work, and the heel is not left behind. This eliminates the need for re-care and minimizes lead time. In addition, since it is sufficient to polish only necessary portions, the yield can be improved. Furthermore, the care tool can be automated by detecting the coincidence between the care tool position and the heel position.

It is the schematic which shows the example of the display format of the haze map information which concerns on this invention. In the steel pipe manufacturing process to which this invention is applied, it is a schematic diagram which shows the example which made the auxiliary | assistant apparatus which comprises the coffin map information display means the auxiliary | assistant apparatus of a 1st form. In the steel pipe manufacturing process to which this invention is applied, it is a schematic diagram which shows the example which made the auxiliary | assistant apparatus which comprises the coffin map information display means the auxiliary | assistant apparatus of a 2nd form. In the steel pipe manufacturing process to which this invention is applied, it is a schematic diagram which shows the example which made the auxiliary | assistant apparatus which comprises the coffin map information display means the auxiliary | assistant apparatus of a 3rd form.

  Hereinafter, an embodiment of the present invention will be described with reference to FIG. 2 showing an example of a steel pipe manufacturing process to which the present invention is applied. In the rolling process shown in FIG. 2 (a), the steel pipe 1 piped by rolling using the pipe rolling mill 11 is given a steel pipe number for identifying the steel pipe, and then conveyed to the flaw detection process.

  In the flaw detection process shown in FIG. 2 (b), the surface flaw detection device 2 makes one flaw detection head 3 run against the surface of the steel pipe 1 from the reference end face 4 that is the steel pipe end face on the running start side in the pipe axis direction. The steel pipe 1 rotates in one direction selected from the rotation starting point 5 in the clockwise direction and the counterclockwise direction from the rotation starting point 5 in synchronization with the traveling of the flaw detection head 3. In the example of FIG. The rotation starting point 5 was set to the 12 o'clock position when a circle centered on the tube axis was regarded as a clock face. The pipe end portion of the steel pipe 1 is provided with a rotation starting point index 6 that indicates the pipe circumferential direction position of the steel pipe 1 that coincides with the circumferential position (12 o'clock position) of the rotation starting point 5 at the start of rotation. The pipe circumferential rotation of the steel pipe 1 is driven by a turning roller (not shown) that supports the steel pipe 1 and rotates it in the pipe circumferential direction.

  The surface flaw detector 2 has a rotation start point 5 of the value of the travel distance x from the reference end surface 4 on the travel start point side of the flaw detection head 3 and the rotation start index 6 of the steel pipe 1 at each time point when the flaw detection head 3 detects wrinkles. In this example, the value of the rotation angle θ and the detected value of the wrinkles (the height and width of the signal waveform, etc.) are transmitted to the flaw detection process computer 7 as transmission data associated with the steel pipe number. To do.

  In the example of FIG. 2, the surface flaw detector 2 is an ultrasonic flaw detector, but the present invention can be applied to other nondestructive inspection devices such as an eddy current flaw detector and a leakage flux flaw detector. Is possible.

  The flaw detection process computer 7 uses the transmitted data that has been transmitted, and from the value of the steel pipe number, the value of the travel distance x, the value of the rotation angle θ, and the detected value of the flaw, for example, in the display format shown in FIG. The displayed wrinkle map information is generated and stored in the wrinkle map information storage means 8 shown in FIG. As shown in the annotation diagram of FIG. 1, the kite map information shown in FIG. 1 uses the value of the travel distance x from the reference end face 4 at the time of detection of the i-th kite as the tube axis direction kite position x (i), The value of the rotation angle θ (clockwise in this example) of the rotation starting point index 6 from the starting point 5 is defined as θ (i). Therefore, the heel position of the ith detected is the distance from the reference end surface 4 in the tube axis direction x (i) and from the rotation starting point index 6 (in this example, counterclockwise, ie, counterclockwise) ) A position where the rotation angle becomes θ (i).

  In addition, the heel length and the heel depth at the time of detection of the i-th heel are represented by, for example, three classes of L (large), M (medium), and S (small). For example, S is 20 mm or less, M is 20 mm or more and 50 mm or less, and L is 50 mm or more. In addition, for example, S is 0.5 mm or less, M is 0.5 mm or more and 1.0 mm or less, and L is 1.0 mm or more.

  Therefore, from the map information of FIG. 1, the position on the steel pipe surface of the i-th detected steel pipe with respect to the steel pipe number = PN *** is the pipe axis direction distance x (i) from the reference end face 4. Of the pipe axis direction and the pipe circumferential direction position of the rotation angle θ (i) from the rotation start index 6 (counterclockwise in this example), and the ridge length and ridge depth of the ridge are respectively It is specified by the 3rd class of L, M, and S.

  Moreover, in this invention, it has the wrinkle map information extraction means 10 in the care process shown in FIG.2 (c). The 疵 map information extracting means 10 accesses the 疵 map information storage means 8 and extracts the 疵 map information corresponding to the specified steel pipe number by specifying the steel pipe number. The cocoon map information extraction means 10 is built in the finishing process computer 9. The steel pipe number to be specified may be input manually by an operator or may be automatically input by a host computer.

  The refining process computer 9 uses the hail map information extracted by the hail map information extraction means 10 and cooperates with the auxiliary device to identify each of the steel pipes 1 having the designated steel pipe number identified by the hail map information. This is a main heel part that displays information on the heel degree (the heel length and the heel depth) corresponding to the heel position (x (i), θ (i)). That is, the main rod part (the process computer 9 for refining) and the auxiliary device specify the rod map information display means (the extracted rod map information is used to identify the steel pipe of the designated steel pipe number with the rod map information. The corresponding wrinkle position (means for displaying information on the wrinkle length and wrinkle depth) is configured at each wrinkle position.

  As the auxiliary device, in the example of FIG. 2C, a printing device 12, a printing traveling device (not shown) for running the printing device 12, and a steel pipe for rotating the steel pipe 1 (clockwise in this example). A rotating device (not shown) is used. The auxiliary device used in this example is referred to as a first type auxiliary device. As the printing device 12, an ink jet printing device is suitable. The turning roller is suitable as the steel pipe rotating device.

  The printing travel device acquires the value of the travel distance X from the reference end face 4 with an appropriate distance meter while transmitting the printing device 12 in the tube axis direction, and transmits it to the finishing process computer 9. The steel pipe rotating device acquires the value of the clockwise rotation angle Θ of the rotation start index 6 from the rotation start point 5A in the care process while rotating the steel pipe 1 with an appropriate rotation angle meter, and performs a process computer 9 for refining. Transmit to. As shown in FIG. 2 (c), the rotation starting point 5A in the care process is a 12 o'clock position in the clock face, and the rotation starting point 5 (FIG. 2 (b) in the flaw detection process. )).

  The refining process computer 9 determines whether the transmitted (X, Θ) value matches the heel position (x (i), θ (i)) in the heel map information, and a match is established. Only when the information is transmitted to the printing device 12 to the extent of i (i). Here, the information on the heel degree (i) includes, for example, the degree of heel length (any of L, M, S) and the degree of heel depth (any of L, M, S) shown in FIG. Each character string is represented by a two-digit character string placed in the first and second digits.

  As a result, in the care process, the surface of the steel pipe 1 of the steel pipe number that is the object of care is located at the position of the heel position detected i-th (i = 1,..., N) with respect to the steel pipe 1 in the flaw detection process. In addition, information about the level of the wrinkle (any one of all nine types of LL, LM, LS, ML, MM, MS, SL, SM, and SS) is printed. It is possible to know information and perform maintenance work without excess or deficiency. If the print size is too small, it is difficult for the operator to see, and if it is too large, the ink is wasted, so about 12 to 32 points are suitable.

  In the embodiment of the present invention, the auxiliary device of the second form may be used instead of the auxiliary device of the first form. For example, as shown in FIG. 3, the auxiliary device of the second form includes a laser pointer 13, a pointer travel device (not shown) for traveling the laser pointer 13, and a steel tube for rotating the steel pipe 1 (clockwise in this example). A rotating device (not shown) and a wearable monitor 20 that displays a value of the eyelid degree (i) in front of the operator's eyes are used.

  The pointer travel device acquires the value of the travel distance X from the reference end face 4 with an appropriate distance meter while transmitting the laser pointer 13 in the tube axis direction, and transmits it to the finishing process computer 9. The steel pipe rotating device acquires the value of the clockwise rotation angle Θ of the rotation start index 6 from the rotation start point 5A in the care process while rotating the steel pipe 1 with an appropriate rotation angle meter, and performs a process computer 9 for refining. Transmit to.

  The refining process computer 9 determines whether the transmitted (X, Θ) value matches the heel position (x (i), θ (i)) in the heel map information, and a match is established. Only when the travel stop command is issued to the pointer travel device, the travel is temporarily stopped, the rotation stop command is issued to the steel pipe rotating device, the rotation is temporarily stopped, and the wearable monitor 20 is about 疵 (i) The value of is transmitted and displayed. At this time, assuming that the heel degree (i) of the i-th heel position among all n points is LM (the heel length is “large” and the heel depth is “medium”), for example, “ Adopting a display format such as “i / n: LM” is preferable because the operator can recognize the remaining number of uncleaned scissors positions.

  As a result, the operator who has the tool (abbreviation for the maintenance tool) 15 has the i / n-th laser beam spot position on the surface of the steel pipe when the laser pointer 13 travels and the rotation of the steel pipe 1 is temporarily stopped. Since it is possible to confirm that the value of the eyelid degree (i) at the i / n-th eyelid position is a value displayed in front of the eye on the wearable monitor 20, perform maintenance work with no excess or deficiency Can do.

  The running and rotation pauses can be canceled by an operator by operating an existing pause release switch (not shown).

  In the embodiment of the present invention, the auxiliary device of the third form may be used instead of the auxiliary device of the second form. For example, as shown in FIG. 4, the auxiliary device of the third embodiment includes a tool suspension device 16 that suspends a tool 15, a tool traveling device (not shown) that travels the tool suspension device 16, and a steel pipe 1 ( In this example, a steel pipe rotating device (not shown) that rotates (clockwise) and a wearable monitor 20 that displays a value of a degree of wrinkle (i) in front of the operator's eyes are used.

  The tool suspension device 16 is preferably a suspension structure in which the tool 15 can be manually moved up and down, for example, an elastic suspension structure using a retractable spring that can be manually extended.

  The tool travel device obtains the value of the travel distance X from the reference end face 4 with an appropriate distance meter while traveling the tool 15 in the tube axis direction via the tool suspension device 16, and the refining process computer 9. Transmit to. The steel pipe rotating device acquires the value of the clockwise rotation angle Θ of the rotation start index 6 from the rotation start point 5A in the care process while rotating the steel pipe 1 with an appropriate rotation angle meter, and performs a process computer 9 for refining. Transmit to.

  The refining process computer 9 determines whether the transmitted (X, Θ) value matches the heel position (x (i), θ (i)) in the heel map information, and a match is established. Only when the tool travel device is issued a travel stop command to temporarily stop the travel, the steel pipe rotation device is issued a rotation stop command to temporarily stop the rotation, and the wearable monitor 20 is about (疵) The value of is transmitted and displayed. At this time, assuming that the heel degree (i) at the i-th heel position among all n points is, for example, LM (the heel length is “large” and the heel depth is “medium”), for example, “ Adopting a display format such as “i / n: LM” is preferable because the operator can recognize the remaining number of uncleaned scissors positions.

  The auxiliary device of the third embodiment corresponds to the “means for specifying the tool position of the care tool used in the care process” according to the present invention (2), and cooperates with the auxiliary device of the third embodiment. The finishing process computer 9 corresponds to the “means for detecting coincidence between the tool position and the heel position” according to the above-described present invention (2). That is, the embodiment illustrated in FIG. 4 corresponds to the embodiment of the present invention (2).

  According to such an embodiment using the auxiliary device of the third form, the operator can determine that the tool position on the surface of the steel pipe is the i / n-th saddle position when the tool 15 travels and the steel pipe 1 is temporarily stopped rotating. Thus, since it is possible to confirm that the value of the eyelid degree (i) at the i / n-th eyelid position is a value displayed in front of the eyes on the wearable monitor 20, it is possible to perform maintenance work without excess or deficiency.

  The running and rotation pauses can be canceled by an operator by operating an existing pause release switch (not shown).

  Further, in the case of the embodiment using the auxiliary device of the third mode, the operator lowers the tool 15 when the tool 15 travels and the steel pipe 1 is temporarily stopped to rotate, and the steel pipe surface portion (saddle position) is directly below. Then, the tool 15 is operated under the tool operating condition selected according to the rule of thumb from the rule of thumb, and after the operation is completed, the tool 15 is raised, and the temporary stop of the tool running and the steel pipe rotation is released.

  Therefore, in the embodiment using the auxiliary device of the third embodiment, the tool 15 is automatically lowered when the travel of the tool 15 and the rotation of the steel pipe 1 are temporarily stopped, and the above-described steel pipe surface portion (saddle position) is Based on the rule of thumb based on the rule of thumb, the tool 15 is automatically operated under the tool operating condition selected according to the degree of wrinkle from the relational rule between the tool level and the tool operating condition, and after the operation is completed, the tool 15 is automatically raised. By providing automatic control means for automatically canceling the temporary stop of the tool running and the steel pipe rotation, the care tool can be an automatic care tool, and the care work can be automated.

  The embodiment shown in FIG. 3 (embodiment using the auxiliary device of the second embodiment) in the process of flawlessly testing the seamless steel pipe after the final rolling process and cleaning the steel pipe determined to be necessary as a result of flaw detection. The present invention was applied to make an example of the present invention.

  The steel pipe has a steel type: carbon steel, an outer diameter: 60.3 to 177.8 mm, a wall thickness: 3.0 to 40.5 mm, and a length: 12 m (constant). As the surface flaw detector 2, an ultrasonic flaw detector having four flaw detection heads is used. A manual sander is used for the maintenance tool.

  In the example of the present invention, the eyelid map information storage means 8 is composed of a storage device externally attached to the flaw detection process computer 7. The cocoon map information extraction means 10 is configured by a PLD (programmable logic device). As the wearable monitor 20, a MOVIO series (registered trademark) manufactured by Epson Corporation was used.

  In the present invention example and the conventional example (example by the above-mentioned conventional care method), for the 1000 seamless steel pipes extracted at random, the number of maintenance required after flaw detection and the re-inspection after care (returning to the flaw detection process and flaw detection again) ) The number of rejected (remaining cocoons) was compared.

  As a result, in the conventional example, 100 out of 1000 were required care, of which 20 were rejected by re-examination and the rejection rate was 20%. On the other hand, in the example of the present invention, 110 out of 1000 are required care, of which 3 are rejected by re-examination, and the rejection rate is 2.7%. The number of rejects due to lack of operator care has been greatly reduced.

DESCRIPTION OF SYMBOLS 1 Steel pipe 2 Surface flaw detector 3 Flaw detection head 4 Reference end face 5 Rotation origin (flaw detection process)
5A Starting point of rotation (care process)
6 Rotation start index 7 Flaw detection process computer 8 疵 Map information storage means 9 Refinement process computer 10 疵 Map information extraction means 11 Tube rolling machine 12 Printing device 13 Laser pointer 15 Tool (care tool)
16 Tool suspension device 20 Wearable monitor

Claims (3)

A steel pipe dredge maintenance guidance system for a steel pipe manufacturing process, comprising a flaw detection process for flaw detection on the surface of a steel pipe, and a care process for scraping off flaws detected in the flaw detection process,
A hail map information storage that is a means for accumulating information on hull positions in the pipe length direction and pipe circumferential direction, and hull length and hull depth for each hull position, which is hail map information for each steel pipe number acquired in the flaw detection process. Means,
From the accumulated map information for each steel pipe number, the map information extracting means is a means for extracting the map data corresponding to the specified steel pipe number by designating the steel pipe number,
疵 which is a means for displaying the information on the corresponding heel length and heel depth at each heel position specified by the heel map information of the steel pipe of the specified steel pipe number using the extracted heel map information A steel pipe rod maintenance guidance system comprising map information display means.   The steel pipe rod care guidance system according to claim 1, further comprising means for specifying a tool position of a care tool used in the care step and means for detecting coincidence between the tool position and the saddle position. .   The steel pipe rod maintenance guidance system according to claim 2, wherein the maintenance tool is an automatic maintenance tool.

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