JPS6255456B2 - - Google Patents
Info
- Publication number
- JPS6255456B2 JPS6255456B2 JP16054280A JP16054280A JPS6255456B2 JP S6255456 B2 JPS6255456 B2 JP S6255456B2 JP 16054280 A JP16054280 A JP 16054280A JP 16054280 A JP16054280 A JP 16054280A JP S6255456 B2 JPS6255456 B2 JP S6255456B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- roller
- welded
- rollers
- bending moment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000000034 method Methods 0.000 claims description 12
- 238000005452 bending Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 230000007547 defect Effects 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000007849 functional defect Effects 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Description
【発明の詳細な説明】
本発明は、大径管の拡管制御方法に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for controlling expansion of a large diameter pipe.
大径管の製造方法の1つにUOE製管法があ
る。このUOE製管法は、所定の寸法に切断した
鋼板を縁切断加工をし、その鋼板をUプレスでU
形に成形し、さらにOプレスで、O形に成形し、
成形管の突合せ部の仮付溶接を経て内外面溶接を
行つて溶接素管を成形し、この溶接素管を所定の
外径寸法まで拡管する。この拡管(エキスパンデ
イング)工程においてはメカニカル・エキスパン
ダまたは水圧エキスパンダが用いられる。 One of the methods for manufacturing large diameter pipes is the UOE pipe manufacturing method. This UOE pipe manufacturing method involves edge-cutting a steel plate cut to predetermined dimensions, and then using a U press to process the steel plate.
Form it into a shape, then use an O press to form it into an O shape.
After tack welding the butt portions of the formed tubes, welding the inner and outer surfaces is performed to form a welded blank tube, and this welded blank tube is expanded to a predetermined outer diameter. A mechanical expander or a hydraulic expander is used in this tube expansion step.
拡管工程は、本来溶接素管を所定の外径寸法に
仕上げるとともに、真円度および真直度を整え、
残留応力を除去することを目的としている。とこ
ろが、メカニカル・エキスパンダによる場合に
は、溶接素管の支持案内に不備があるとき、正確
な真円度が得られず、寸法精度が低下する事態が
起ることがある。このような事態は、エキスパン
ダ・ヘツド前のVローラの不備によつてしばしば
発生する。以下、図面を参照して不良拡管の機構
について説明する。 The pipe expansion process originally involves finishing the welded raw pipe to the specified outer diameter, adjusting the roundness and straightness,
The purpose is to remove residual stress. However, in the case of using a mechanical expander, if there is a defect in supporting and guiding the welded blank pipe, accurate roundness may not be obtained and dimensional accuracy may deteriorate. This situation often occurs due to a defective V-roller in front of the expander head. Hereinafter, the mechanism of defective tube expansion will be explained with reference to the drawings.
第1図に示すように、従来の拡管工程において
は、溶接素管1はロア・ローラ2とVローラ3と
によつて案内支持され、メカニカル・エキスパン
ダ4のエキスパンダ・ヘツド5が、ローラ2と3
との間に配置されて溶接素管1を内側から拡管し
ていた。 As shown in FIG. 1, in the conventional pipe expansion process, a welded raw pipe 1 is guided and supported by lower rollers 2 and V rollers 3, and the expander head 5 of a mechanical expander 4 is moved by the rollers. 2 and 3
The welded raw pipe 1 was expanded from the inside.
エキスパンダ・ヘツド5の手前(溶接素管の進
行方向上流側)にある1対の片持ち式Vローラ3
は、従来固定式のものであり、その外周には溶接
素管1の外面に傷を付けないようにポリウレタン
等の被覆が設けられている。溶接素管1に曲りや
いびつがある場合、Vローラ3の片方に溶接素管
1が偏重し、Vローラ3の被覆を摩耗損傷させ
る。その結果、エキスパンダ・ヘツド5の中心と
溶接素管1の中心とがずれた状態で拡管が行われ
ることになり、成品の寸法精度が低下する。 A pair of cantilever type V rollers 3 located in front of the expander head 5 (on the upstream side in the direction of movement of the welded raw pipe)
is conventionally of a fixed type, and its outer periphery is coated with polyurethane or the like so as not to damage the outer surface of the welded raw pipe 1. When the welded raw pipe 1 is bent or distorted, the welded raw pipe 1 is biased on one side of the V roller 3, causing wear and tear on the coating of the V roller 3. As a result, the tube is expanded in a state where the center of the expander head 5 and the center of the welded blank tube 1 are shifted from each other, resulting in a decrease in the dimensional accuracy of the finished product.
従来、これを防止するために、Vローラのブラ
ケツトにシムを手作業で出し入れすることによつ
てVローラの間隔を調整し、それによつて溶接素
管の中心位置を調製していた。しかし、溶接素管
1本ごとにこのような位置調整を行うことは実際
には困難であり、寸法不良はまぬかれえなかつ
た。 Conventionally, in order to prevent this, the interval between the V rollers was adjusted by manually inserting and removing shims into the brackets of the V rollers, thereby adjusting the center position of the welded blank pipe. However, it is actually difficult to perform such position adjustment for each welded raw pipe, and dimensional defects are inevitable.
さらに、高拡管率の場合に、溶接素管に曲りや
いびつがあるとき、第1図および第2図に示すよ
うに、Vローラ3の一方または両方が溶接素管1
にまつたく接触しなくなり、寸法精度がますます
低下する。 Furthermore, in the case of a high expansion rate, when the welded raw pipe is bent or distorted, one or both of the V rollers 3
There is no immediate contact, and dimensional accuracy further deteriorates.
したがつて、本発明の目的は、大径管製管法に
おける拡管工程において、寸法不良の原因となる
Vローラの機能上の不備をできるだけなくし、工
数の削減を図り、品質および生産能率の向上を図
ることにある。 Therefore, an object of the present invention is to eliminate as much as possible the functional defects of the V rollers that cause dimensional defects in the tube expansion process of the large-diameter pipe manufacturing method, reduce man-hours, and improve quality and production efficiency. The aim is to achieve this goal.
本発明の方法は、1対の片持ち式Vローラを別
個独立して位置調整できるように支持し、Vロー
ラの支持軸の支持端側に荷重検出器を取り付け、
溶接素管が各Vローラに作用する曲げモーメント
を検出し、各曲げモーメントが設定値とそれぞれ
等しくなるように各Vローラの位置を調整するこ
とを特徴とする。 The method of the present invention includes supporting a pair of cantilevered V rollers so that their positions can be adjusted separately, and attaching a load detector to the support end side of the support shaft of the V rollers.
It is characterized in that the bending moment acting on each V roller of the welded blank pipe is detected, and the position of each V roller is adjusted so that each bending moment is equal to a set value.
次に、第3図を参照して本発明の方法を説明す
る。溶接素管1の搬送ライン上の所定の位置に昇
降台10を設ける。昇降台10は常態では上昇し
ているが、必要なときには下降することができ
る。昇降台10上に1対のホルダ20を滑動自在
に取り付ける。ホルダ20は、昇降台10に回転
自在に支持されたねじ軸11によつて昇降台上を
溶接素管1の長手方向に直角な方向に移動させら
れる。 Next, the method of the present invention will be explained with reference to FIG. A lifting platform 10 is provided at a predetermined position on the transport line for the welded blank pipe 1. The lifting platform 10 is normally raised, but can be lowered when necessary. A pair of holders 20 are slidably attached on a lifting platform 10. The holder 20 is moved on the lifting table in a direction perpendicular to the longitudinal direction of the welded blank pipe 1 by a screw shaft 11 rotatably supported on the lifting table 10.
ホルダ20の上端に水平に支持軸30を片持ち
状に支持し、支持端側に荷重検出器31を取り付
け、自由端にVローラ3を回転自在に取り付け
る。 A support shaft 30 is horizontally supported in a cantilever manner on the upper end of the holder 20, a load detector 31 is attached to the support end side, and a V roller 3 is rotatably attached to the free end.
荷重検出器31からの検出信号が制御装置40
に送られ、また、制御装置40からの制御信号が
各ねじ軸11に連結された各モータ50に送られ
る。 The detection signal from the load detector 31 is transmitted to the control device 40.
Further, a control signal from the control device 40 is sent to each motor 50 connected to each screw shaft 11.
溶接素管1の形状および搬送位置が正しいとき
には、溶接素管1の断面中心Oは、第3図に示す
ように、正常位置にあり、その重量Wは左右のV
ローラ3の同じ位置に等分(W/2)に作用す
る。すなわち、Vローラ3と溶接素管1との接触
点Pと荷重検出器31の内側端面との間隔lは、
左右のVローラとも同じである。このとき左右の
荷重検出器31によつて検出される曲げモーメン
トMはWl/2となる。 When the shape and transportation position of the welded raw pipe 1 are correct, the cross-sectional center O of the welded raw pipe 1 is at the normal position as shown in FIG. 3, and its weight W is equal to the left and right V.
It acts equally (W/2) on the same position of the roller 3. That is, the distance l between the contact point P between the V roller 3 and the welded pipe 1 and the inner end surface of the load detector 31 is as follows:
The left and right V rollers are the same. At this time, the bending moment M detected by the left and right load detectors 31 is Wl/2.
ところが、溶接素管1の形状不良またはVロー
ラ3の不備等によつて溶接素管1の搬送位置が、
例えば第3図に示すようにその中心がO点から左
側にΔxだけずれたO′点に移動したときには、
左右のVローラ3の各接触点PはそれぞれP′点に
移動する。その移動量は近似的に両者ともΔxに
なる。このとき左側にある荷重検出器31によつ
て検出される曲げモーメントMLはW(l−Δ
x)/2となり、また、右側にある荷重検出器3
1によつて検出される曲げモーメントMRはW
(l+Δx)/2となる。 However, due to a defect in the shape of the welded raw pipe 1 or a defect in the V roller 3, the conveyance position of the welded raw pipe 1 may be incorrect.
For example, as shown in Figure 3, when the center moves from point O to point O', which is shifted by Δx to the left,
Each contact point P of the left and right V rollers 3 moves to point P'. The amount of movement is approximately Δx for both. At this time, the bending moment M L detected by the load detector 31 on the left side is W(l−Δ
x)/2, and load detector 3 on the right side
The bending moment M R detected by 1 is W
(l+Δx)/2.
制御装置40は、正常時の曲げモーメントM
(設定値)と異常時の各曲げモーメントMLおよび
MRとをそれぞれ比較し、Δxが零になるように
各モータ50に制御信号を送る。 The control device 40 controls the bending moment M during normal operation.
(set value) and each bending moment M L and M R at the time of abnormality are compared, and a control signal is sent to each motor 50 so that Δx becomes zero.
以上の説明から明らかなように、本発明の方法
によれば、既設の設備を簡単に改良するだけで、
拡管精度を向上させることができ、作業能率を向
上させ、Vローラの故障を低減させることができ
る。 As is clear from the above explanation, according to the method of the present invention, by simply improving existing equipment,
The pipe expansion accuracy can be improved, work efficiency can be improved, and failures of the V rollers can be reduced.
第1図は従来の大径管の拡管方法を示す概略説
明図。第2図は第1図の−線からみた正面
図。第3図は本発明の方法を示す概略説明図。
1:溶接素管、2:ロア・ローラ、3:Vロー
ラ、4:メカニカル・エキスパンダ、5:エキス
パンダ・ヘツド、10:昇降台、11:ねじ軸、
20:ホルダ、30:支持軸、31:荷重検出
器、50:モータ。
FIG. 1 is a schematic explanatory diagram showing a conventional method for expanding a large diameter pipe. FIG. 2 is a front view taken from the - line in FIG. 1. FIG. 3 is a schematic explanatory diagram showing the method of the present invention. 1: Welded raw pipe, 2: Lower roller, 3: V roller, 4: Mechanical expander, 5: Expander head, 10: Lifting platform, 11: Screw shaft,
20: Holder, 30: Support shaft, 31: Load detector, 50: Motor.
Claims (1)
いて、1対の片持ち式Vローラを別個独立して位
置調整できるように支持し、前記Vローラの支持
軸の支持端側に荷重検出器を取り付け、溶接素管
が各Vローラに作用する曲げモーメントを検出
し、各曲げモーメントが設定値とそれぞれ等しく
なるように各Vローラの位置をそれぞれ調整する
ことを特徴とした大径管の拡管制御方法。1 In the mechanical pipe expansion process of the UOE pipe production line, a pair of cantilevered V rollers is supported so that their positions can be adjusted separately, a load detector is attached to the support end side of the support shaft of the V roller, and welded. A method for controlling the expansion of a large-diameter pipe, characterized by detecting the bending moment of the raw pipe acting on each V-roller, and adjusting the position of each V-roller so that each bending moment becomes equal to a set value.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16054280A JPS5785627A (en) | 1980-11-14 | 1980-11-14 | Controlling method for expanding of large diameter tube |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16054280A JPS5785627A (en) | 1980-11-14 | 1980-11-14 | Controlling method for expanding of large diameter tube |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5785627A JPS5785627A (en) | 1982-05-28 |
JPS6255456B2 true JPS6255456B2 (en) | 1987-11-19 |
Family
ID=15717227
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16054280A Granted JPS5785627A (en) | 1980-11-14 | 1980-11-14 | Controlling method for expanding of large diameter tube |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5785627A (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6015029A (en) * | 1983-07-06 | 1985-01-25 | Nippon Kokan Kk <Nkk> | Controlling method of lateral bending for mechanical expander |
DE3742174C1 (en) * | 1987-12-12 | 1989-04-20 | Oxytechnik Ges Systemtech | Process for supporting rod-shaped workpieces |
KR100844927B1 (en) | 2007-01-15 | 2008-07-09 | 국방과학연구소 | Horizontal type of 3-dimensional weight measurement apparatus for cylindrical missile |
KR101093234B1 (en) | 2009-05-21 | 2011-12-12 | 오종한 | Apparatus for quenching |
-
1980
- 1980-11-14 JP JP16054280A patent/JPS5785627A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS5785627A (en) | 1982-05-28 |
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