JP4144398B2 - Method for aligning UOE steel pipe weld beads - Google Patents

Description

【００３１】
このように、タブ板６がタブ板検出器Ａ、ＢおよびＣのうちのどの検出器で検出されたのか、またどの順序で検出されたのかにより、回転ロ−ラ４に搬入されたときのタブ板６の停止位置が把握される。
【００３２】
したがって、タブ板６が鋼管１の管軸の左側で停止していると判断されたときには、鋼管１が左回りとなるように、回転ロ−ラ４を回転させ、タブ板検出器Ｂでタブ板６を検出したときに、回転を停止することにより、タブ板６、すなわち溶接ビ−ドを鋼管１断面の最下端位置に、最短時間で位置させることができる。
【００３３】
また、タブ板６が鋼管１の管軸の右側で停止していると判断されたときには、鋼管１が右回りとなるように、回転ロ−ラ４を回転させ、タブ板検出器Ｂでタブ板６を検出したときに、回転を停止することにより、タブ板６、すなわち溶接ビ−ドを鋼管１断面の最下端位置に、最短時間で位置させることができる。
【００３４】
タブ板６が鋼管１断面の最下端位置に位置していると判断されたときには、その状態のまま回転はさせない。タブ板６が鋼管１断面の最上端位置に位置していると判断されたときには、鋼管１を右回りでも左回りの何れかさせて、タブ板６を鋼管１の最下端位置に位置させればよいが、その回転方向はあらかじめ決めておけばよい。
【００３５】
次に、タブ板６の幅方向中心位置が鋼管１の最下端位置、すなわち中央のタブ板検出器のみでタブ板６が検出される位置に正確に位置させる方法の一例を、図４および図５により説明する。 図４（ａ）〜図４（ｃ）各タブ板検出器でタブ板を検出する順序を示す図、図５はタブ板の位置合わせ手順を示すブロック図である。
【００３６】
図４（ａ）はタブ板６が鋼管１の右側で停止した場合であるが、図４（ａ）に示すように、回転ロ−ラ４により鋼管１を右回りに回転させて、タブ板６をタブ板検出器Ｃで検出する（Ｓ１）。
【００３７】
そして、タブ板検出器Ｃのタブ板検出信号に基づいて、回転ロ−ラ４を駆動させるインバ−タモ−タの減速を開始する（Ｓ２）。
【００３８】
減速後に、図４（ｂ）に示すように、タブ板６をタブ板検出器Ａで検出する（Ｓ３）。そして、タブ板検出器Ａのタブ板検出信号に基づいて、回転ロ−ラ４を駆動させるインバ−タモ−タの運転を停止し、回転ロ−ラ４の回転を停止させる（Ｓ４）。
【００３９】
次いで、図４（ｃ）に示すように、回転ロ−ラ４を寸動で逆回転させて、鋼管１を左回りに停止予測位置まで回転させる（Ｓ５）。
【００４０】
そして、タブ板６がタブ板検出器Ａから外れ、かつタブ板検出器Ｃで検出されない状態、すなわち、タブ板検出器Ｂのみで検出されている状態で、鋼管１の回転を停止させる（Ｓ６）。
【００４１】
本発明のＵＯＥ鋼管溶接ビ−ドの位置合わせ方法においては、ＵＯＥ鋼管を回転ロ−ラに搬入させるときに、鋼管の回転を利用してタブ板を検出し、その検出の状態から回転ロ−ラ上で停止したときのタブ板の停止位置を判断し、その判断に基づいて、溶接ビ−ドを切削するのに適した鋼管の最下端位置に最短時間で位置させることができるので、溶接ビ−ド切削に要する作業時間を短縮することができる。
【００４２】
【発明の効果】
本発明により、溶接ビ−ドを切削するのに適した鋼管の最下端位置に最短時間で位置させることができるので、溶接ビ−ド切削に要する作業時間を短縮することができる。
【図面の簡単な説明】
【図１】本発明のＵＯＥ鋼管溶接ビ−ドの位置合わせ方法の実施の形態の説明図であり、（ａ）はＵＯＥ鋼管が回転ロ−ラに搬入される状態を示す側面図、（ｂ）はＵＯＥ鋼管が回転ロ−ラに搬入された後の状態を示す側面図、（ｃ）はＵＯＥ鋼管が回転ロ−ラに搬入される状態を示す平面図、（ｄ）はＵＯＥ鋼管が回転ロ−ラに搬入された後の状態を示す平面図である
【図２】本発明のＵＯＥ鋼管溶接ビ−ドの位置合わせ方法において、タブ板を設置する位置を示す図である。
【図３】搬送中のタブ板の軌跡を示す図である。
【図４】（ａ）〜（ｃ）タブ板検出器でタブ板を検出する順序を示す図である。
【図５】タブ板の位置合わせ手順を示すブロック図である。
【符号の説明】
１ ＵＯＥ鋼管
２ スキッド
３ａ、３ｂ ロ−ラ
４ 回転ロ−ラ
５ 受止め装置
６ タブ板
７ タブ板の軌跡
Ａ、Ｂ、Ｃ タブ板検出器[0001]
BACKGROUND OF THE INVENTION
The present invention aligns the weld bead formed on the inner and outer surfaces of the UOE steel pipe so that the weld bead is located at the lowermost end of the UOE steel pipe when the cutting means removes the weld bead. The present invention relates to a method for aligning UOE steel pipe weld beads.
[0002]
[Prior art]
A weld bead is formed on the inner and outer surfaces of the steel pipe by welding a seam portion of a UOE steel pipe (hereinafter simply referred to as a steel pipe) by an inner surface welding machine and outer surface welding. The weld bead in the range of about 500 mm from the end of the pipe is to the height of the inner or outer peripheral surface of the steel pipe according to the needs of the customer (the weld bead is equivalent to the wall thickness of the steel pipe). Need to be removed).
[0003]
Conventionally, when cutting the weld bead on the inner surface of the pipe end of the steel pipe as described above, the following method is used. A rotating roller composed of a pair of left and right rollers with rotating axes parallel to each other in the vicinity of both ends of the steel pipe is supported so as to be rotatable around the tube axis, and the rotating roller is rotated to weld bead In order to perform welding and welding, the tab plate welded to the pipe end of the steel pipe is positioned at the lowest end. At this time, it is common for an operator to visually determine whether or not the welding bead and the tab plate are positioned at the lowermost position.
[0004]
Then, after the tab plate is cut from the steel pipe, the inner surface weld bead is cut with a rotating cutter.
[0005]
In such steel pipe weld bead alignment, as a method of performing the alignment efficiently, the tab plate joined to the steel pipe from above is detected by the tab plate detector while rotating the steel pipe on the rotary roller. A method has been proposed in which the rotation of the rotary roller is stopped after a certain time from the detected time point, and the weld bead of the steel pipe is aligned at a predetermined position (see, for example, Patent Document 1).
[0006]
[Patent Document 1]
Japanese Utility Model Publication No. 60-11190 [0007]
[Problems to be solved by the invention]
However, the steel pipe welding bead positioning method disclosed in Patent Document 1 is a method of detecting a tab plate while rotating a steel pipe around a pipe axis in a certain direction on a rotary roller. Depending on the position of the tab plate in the circumferential direction of the steel pipe before starting the rotation of the roller, the steel pipe is rotated as much as one and a half revolutions, so that there is a problem that the efficiency is not necessarily good.
[0008]
The present invention has been made to solve the above-described problems of the prior art, and can grasp the position of the tab plate of the steel pipe at the time when it is carried into the rotary roller. It is an object of the present invention to provide a method for aligning a UOE steel pipe weld bead capable of aligning a UOE steel pipe weld bead in a short time based on the position of the above.
[0009]
[Means for Solving the Problems]
The method for aligning a UOE steel pipe weld bead according to the present invention is such that when the weld bead formed on the inner and outer surfaces of the UOE steel pipe is cut and removed by a cutting means, the weld bead is a UOE steel pipe. The UOE steel pipe weld bead is positioned so as to be positioned at the lowermost end of the pipe, and a pair of rolls having parallel rotation axes for rotatably supporting the UOE steel pipe around its pipe axis. A tab plate welded to the pipe end of the UOE steel pipe being carried in from the side of the rotary roller while being rolled onto the rotary roller made of the rubber is configured as the rotary roller. By detecting with three tab plate detecting means arranged at predetermined intervals in the direction orthogonal to the rotation axis of the roller with the center position between the pair of rollers as the center, Grasping the circumferential position of the UOE steel pipe tab plate after stopping at Is to determine the direction of rotation of the UOE steel pipe on the basis of the position of the tab plate grasped.
[0010]
In the UOE steel pipe weld bead alignment method according to the present invention, the position of the tab plate when the UOE steel pipe is carried on the rotary roller is determined as a pair of rollers constituting the rotary roller. Detection is performed by three tab plate detecting means arranged at a predetermined interval in a direction perpendicular to the rotation axis of the roller with the center position therebetween.
[0011]
Thus, since the tab plate is detected by the three tab plate detecting means, it is possible to grasp where the tab plate is located in the circumferential direction of the UOE steel pipe, and the tab plate is on the right side with the tube axis as the center. Sometimes, the steel pipe is rotated clockwise, and when the tab plate is on the left side about the pipe axis, the steel pipe is rotated counterclockwise so that the welding bead is positioned at the lowermost position of the UOE steel pipe in the shortest time. it can.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view of an embodiment of an alignment method for a UOE steel pipe weld bead according to the present invention. FIG. 1 (a) is a side view showing a state in which a UOE steel pipe is carried into a rotary roller. ) Is a side view showing a state after the UOE steel pipe is carried into the rotary roller, (c) is a plan view showing a state where the UOE steel pipe is carried into the rotary roller, and (d) is a diagram showing the rotation of the UOE steel pipe. It is a top view which shows the state after carrying in to a roller.
[0013]
In this welding bead alignment method, a UOE steel pipe (hereinafter referred to as a steel pipe) 1 is rotated around a pipe axis on a sloped skid 2 while a pair of left and right rotating shafts are parallel to each other. It is rolled into a rotating roller 4 (two rotating rollers are arranged in the figure) constituted by the rollers 3a and 3b.
[0014]
On the rotating roller 4, a receiving device 5 for receiving the steel pipe 1 that has entered while rolling is provided side by side. The steel pipe 1 is stopped by contacting the receiving device 5. Thereafter, the roller rotating device is raised and the receiving device 5 is lowered, whereby the steel pipe 1 is supported on the rotating roller so as to be rotatable around the tube axis.
[0015]
When the steel pipe 1 enters the rotary roller 4 while rolling, the tab plate 6 welded to the pipe end of the steel pipe 1 has three tab plate detectors A provided above the passage of the tab plate 6. The presence or absence of the passage is detected by B and C.
[0016]
The tab plate detectors A, B, and C are arranged at a middle position between the pair of rollers 3a and 3b constituting the rotary roller 4 as shown in the drawing showing the tab plate installation position in FIG. B is arranged, and tab plate detectors A are arranged on the left side of the drawing centered on the tab plate detector B, and tab plate detectors C are arranged on the right side of the drawing at equal intervals.
The distance W between the tab plate detectors at both ends is the width of the tab plate 6 so that the tab plate 6 is not simultaneously detected by the three tab plate detectors. The width of the tab plate 6 is, for example, 220 mm with respect to 200 mm.
[0017]
Next, it is determined by the tab plate detectors A, B and C described above where the tab plate 6 of the steel pipe 1 after resting on the rotary roller 4 is located in the circumferential direction of the steel pipe 1. How to do it.
[0018]
When the steel pipe 1 is carried into the rotary roller 4 while rotating on the skid 2 around the pipe axis, the tab plate 6 draws a locus as shown in FIG. In FIG. 3, the horizontal axis indicates the position of the skid 2 in the rolling direction, and the vertical axis indicates the height position in the vertical direction from the rolling surface of the skid 2.
[0019]
As can be seen from this graph, since the tab plate 6 moves while drawing a cycloid curve, the tab plate 6 passes through the tab plate detector in the order of A, B, C, but the tab plate 6 is the tab plate. If the rotation of the steel pipe 1 stops before passing through the detector, the tab plate 6 will not be detected by any tab plate detector.
[0020]
Further, the height at which the tab plate 6 is detected by the tab plate detector may be detected in a state where it is at the upper end of the steel pipe 1 or may be detected in a state where it is at the lower end of the steel pipe 1.
[0021]
Therefore, the mode (including the case where the tab plate 6 is not detected at all) until the tab plate 6 is detected and stopped by the tab plate detector can be classified as shown in Table 1.
[0022]
Case 1 is a case where the tab plate 6 (the black portion of the cross section of the steel pipe in Table 1) is not detected by any of the tab plate detectors A, B and C, and the tab plate 6 is on the left side. Therefore, in order to position the tab plate 6 at the lowest end of the steel pipe 1 in the shortest time, the steel pipe 1 may be rotated counterclockwise.
[0023]
Case 2 is a case where the tab plate 6 is detected only by the tab plate detector A or by A and B at the same time, but not by C. In this case, the tab plate 7 is detected above the axis of the steel pipe 1 (position indicated by (1)) and below the axis of the steel pipe 1 (position indicated by (2)). In some cases, it is determined that the tab plate 6 is on the left side regardless of the detected position in the height direction of the tab plate 6. Therefore, the steel pipe may be rotated counterclockwise.
[0024]
Case 3 is a case where the tab plate 6 is detected by the tab plate detector A at a position higher than the axis of the steel pipe 1 and then detected only by B but not by C. In this case, since the tab plate 6 is determined to be stopped at the position of the uppermost end of the cross section of the steel pipe 1, the tab plate 6 is rotated clockwise or counterclockwise (the rotation direction is determined in advance).
[0025]
Case 4 is a case where the tab plate 6 is detected by only the B and C or C after the tab plate 6 is detected by the tab plate detector A, and it is determined that the tab plate 6 is on the right side. Can be rotated clockwise.
[0026]
Case 5 is a case where the tab plate 6 passes through the tab plate detector in the order of A, B, and C. Also in this case, the tab plate 6 is judged to be on the right side, so the steel pipe is rotated clockwise. You can do it.
[0027]
Case 6 is a case where the tab plate 6 is detected by the tab plate detector A at a position lower than the axis of the steel pipe 1 and then detected only by B but not by C. In this case, since it is determined that the tab plate 6 is stopped at the lowermost position of the cross section of the steel pipe 1, it does not rotate or is handled by fine adjustment.
[0028]
In both cases 3 and 6, the detection of the tab plate 7 is such that the tab plate 7 is first detected by the tab plate detector A, then detected by B and not detected by C. It is necessary to determine whether the tab plate 6 is at a position higher or lower than the axis of the steel pipe 1 because the form to be performed is the same. In this case, the steel pipe 1 is If the tab plate 6 is detected by the tab plate detector C by rotating in either direction, for example, the right direction, it can be determined that the case 3 is detected, and the tab plate 6 is detected by the tab plate detector A. In this case, it can be determined that the case 6 is the case.
[0029]
Further, the vertical position may be determined by providing the tab plate detector B with a distance measuring function without doing this.
[0030]
[Table 1]

[0031]
Thus, when the tab plate 6 is carried into the rotary roller 4 depending on which detector of the tab plate detectors A, B and C is detected, and in which order it is detected. The stop position of the tab plate 6 is grasped.
[0032]
Therefore, when it is determined that the tab plate 6 is stopped on the left side of the tube axis of the steel pipe 1, the rotary roller 4 is rotated so that the steel pipe 1 is counterclockwise, and the tab plate detector B By stopping the rotation when the plate 6 is detected, the tab plate 6, that is, the weld bead, can be positioned at the lowest end position of the cross section of the steel pipe 1 in the shortest time.
[0033]
When it is determined that the tab plate 6 is stopped on the right side of the tube axis of the steel pipe 1, the rotary roller 4 is rotated so that the steel pipe 1 turns clockwise, and the tab plate detector B By stopping the rotation when the plate 6 is detected, the tab plate 6, that is, the weld bead, can be positioned at the lowest end position of the cross section of the steel pipe 1 in the shortest time.
[0034]
When it is determined that the tab plate 6 is located at the lowest end position of the cross section of the steel pipe 1, the tab plate 6 is not rotated in that state. When it is determined that the tab plate 6 is positioned at the uppermost end position of the cross section of the steel pipe 1, the tab plate 6 can be positioned at the lowermost position of the steel pipe 1 by moving the steel pipe 1 clockwise or counterclockwise. The rotation direction may be determined in advance.
[0035]
Next, an example of a method in which the center position in the width direction of the tab plate 6 is accurately positioned at the lowest end position of the steel pipe 1, that is, the position at which the tab plate 6 is detected only by the center tab plate detector, is shown in FIGS. 5 will be described. 4 (a) to 4 (c) are diagrams showing the order in which the tab plates are detected by the tab plate detectors, and FIG. 5 is a block diagram showing the tab plate alignment procedure.
[0036]
FIG. 4A shows a case where the tab plate 6 is stopped on the right side of the steel pipe 1. As shown in FIG. 4A, the steel pipe 1 is rotated clockwise by the rotating roller 4, so that the tab plate 6 is detected by the tab plate detector C (S1).
[0037]
Based on the tab plate detection signal from the tab plate detector C, the inverter motor that drives the rotary roller 4 starts decelerating (S2).
[0038]
After the deceleration, the tab plate 6 is detected by the tab plate detector A as shown in FIG. 4B (S3). Based on the tab plate detection signal of the tab plate detector A, the operation of the inverter motor that drives the rotary roller 4 is stopped, and the rotation of the rotary roller 4 is stopped (S4).
[0039]
Next, as shown in FIG. 4C, the rotary roller 4 is reversely rotated by inching to rotate the steel pipe 1 counterclockwise to the predicted stop position (S5).
[0040]
Then, the rotation of the steel pipe 1 is stopped in a state where the tab plate 6 is detached from the tab plate detector A and is not detected by the tab plate detector C, that is, in a state where only the tab plate detector B is detected (S6). ).
[0041]
In the UOE steel pipe welding bead positioning method of the present invention, when the UOE steel pipe is carried into the rotating roller, the tab plate is detected by utilizing the rotation of the steel pipe, and the rotating roller is detected from the detected state. The stop position of the tab plate when stopped on the steel plate is judged, and based on that judgment, the welding pipe can be positioned at the bottom end position of the steel pipe suitable for cutting in the shortest time. The work time required for bead cutting can be shortened.
[0042]
【The invention's effect】
According to the present invention, it is possible to position at the lowest end position of the steel pipe suitable for cutting the weld bead in the shortest time, so that the work time required for cutting the weld bead can be shortened.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an explanatory view of an embodiment of a UOE steel pipe weld bead alignment method according to the present invention, (a) is a side view showing a state in which a UOE steel pipe is carried into a rotary roller; ) Is a side view showing a state after the UOE steel pipe is carried into the rotary roller, (c) is a plan view showing a state where the UOE steel pipe is carried into the rotary roller, and (d) is a diagram showing the rotation of the UOE steel pipe. It is a top view which shows the state after carrying in to a roller. FIG. 2 is a figure which shows the position which installs a tab board in the positioning method of the UOE steel pipe welding bead of this invention.
FIG. 3 is a diagram showing a trajectory of a tab plate being conveyed.
FIGS. 4A to 4C are diagrams showing an order in which tab plates are detected by a tab plate detector. FIG.
FIG. 5 is a block diagram showing a tab plate alignment procedure;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 UOE steel pipe 2 Skid 3a, 3b Roller 4 Rotating roller 5 Receiving device 6 Tab board 7 Tab board locus A, B, C Tab board detector

Claims (1)

The UOE steel pipe weld bead is positioned so that the weld bead is positioned at the lowermost end of the UOE steel pipe when the welding bead formed on the inner and outer surfaces of the UOE steel pipe is removed by cutting with a cutting means. -A positioning method of the blade, wherein the rotating roller supporting the UOE steel pipe rotatably about its axis is formed on a rotating roller consisting of a pair of rollers having parallel rotating axes. A tab plate which is carried in while rolling the UOE steel pipe from the side and welded to the pipe end of the UOE steel pipe being carried in is a roller centered on the center position between the pair of rollers constituting the rotating roller. The circumferential position of the tab plate of the UOE steel pipe after stopping on the rotary roller is detected by three tab plate detecting means arranged at a predetermined interval in a direction orthogonal to the rotation axis of Based on the tab plate position grasped and grasped, how to rotate the UOE steel pipe UOE steel pipe welded bi and determines the - alignment method of de.

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