JPH01197011A - Apparatus for measuring outer diameter of pipe and straightening bend - Google Patents
Apparatus for measuring outer diameter of pipe and straightening bendInfo
- Publication number
- JPH01197011A JPH01197011A JP2336388A JP2336388A JPH01197011A JP H01197011 A JPH01197011 A JP H01197011A JP 2336388 A JP2336388 A JP 2336388A JP 2336388 A JP2336388 A JP 2336388A JP H01197011 A JPH01197011 A JP H01197011A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- outer diameter
- pipe
- sensor
- straightening
- 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.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 13
- 238000005452 bending Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract 2
- 238000005259 measurement Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は管外径計測および曲がり矯正を行う装置に関す
る。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a device for measuring the outer diameter of a tube and straightening the bend.
従来の技術
従来、鋳造された管は、真円性、および真直性にばらつ
きを有しており、このために管の径を計測する装置が各
管の呼び径に応じてそれぞれ別途に設けられていた。Conventional technology Conventionally, cast pipes have variations in roundness and straightness, and for this reason, separate devices have been installed to measure the diameter of each pipe, depending on the nominal diameter of each pipe. was.
発明が解決しようとする問題点
上記従来の構成によれば、管の径を計測する装置を各管
の呼び径ごとに設けるために、設備費が高くなる問題が
あった。Problems to be Solved by the Invention According to the above-mentioned conventional configuration, a device for measuring the diameter of the pipe is provided for each nominal diameter of the pipe, which causes a problem of high equipment costs.
本発明は上記問題点を解決するもので、あらゆる径の管
に対応して管の外径を測定することができ、しかも容易
に矯正を行うことができる管外径計測および曲がり矯正
を行う装置を提供することを目的とする。The present invention solves the above-mentioned problems, and is an apparatus for measuring the outer diameter of a pipe and straightening a bend, which can measure the outer diameter of a pipe of any diameter, and can easily straighten the pipe. The purpose is to provide
問題点を解決するための手段
上記問題点を解決するために、本発明は、対象管を水平
方向に支持するとともに、管軸心まわりに回転させる回
転装置と、管の上方に位置して管軸心方向に移動自在に
設けられ、管を下方に押圧する矯正装置と、管軸心方向
に沿って複数配置される管外径計測装置と、この管外径
計測装置に設けられ、水平でかつ管軸心と直交する方向
の光軸を形成し、上下に一対配置されるセンサ部と、両
センサ部を上下に離間させて、上方に位置する光軸を管
上端縁に対応させるとともに、下方に位置する光軸を管
下端縁に対応させるセンサ部駆動装置と、両センサ部の
間の距離を測定するスケール部と、回転装置および矯正
装置の駆動を制御するとともに、センサ部およびスケー
ル部で検出される値にもとづいて対象管の真円性および
真直性を判断する制御装置とを備えた構成としたもので
ある。Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a rotating device that horizontally supports the target tube and rotates it around the tube axis, and a rotating device that is located above the tube. A straightening device that is movable in the axial direction and presses the tube downward; a plurality of tube outer diameter measuring devices arranged along the tube axial direction; and forming an optical axis in a direction perpendicular to the tube axis, a pair of sensor sections arranged above and below, and both sensor sections being vertically separated so that the optical axis located above corresponds to the upper edge of the tube, A sensor part driving device that makes the optical axis located below correspond to the lower edge of the tube, a scale part that measures the distance between both sensor parts, and a sensor part and a scale part that control the driving of the rotation device and the straightening device. and a control device that determines the roundness and straightness of the target tube based on the values detected by.
作用
上記構成において、センサ部駆動装置によりセンサ部を
適当に離間させ、回転装置上に配置された対象管の管上
端縁と管下端縁にそれぞれセンサ部の光軸を対応させる
。したがって、複数種類の外径が異なる管に対応して、
管外径の計測を行う。Operation In the above configuration, the sensor parts are appropriately spaced apart by the sensor part driving device, and the optical axis of the sensor part is made to correspond to the upper end edge and the lower end edge of the target tube, respectively, which are arranged on the rotating device. Therefore, in response to multiple types of pipes with different outer diameters,
Measure the outside diameter of the pipe.
そして、計測された値から制御装置で、対象管の真円性
および真直性を判断する。そして、制御装置で算出され
た矯正必要位置および矯正必要量にもとづいて、回転装
置および矯正装置を駆動し、矯正装置による押圧によっ
て対象管を適宜に矯正する。Then, the control device determines the roundness and straightness of the target tube based on the measured values. Then, based on the correction required position and correction amount calculated by the control device, the rotating device and the correction device are driven, and the target tube is appropriately corrected by pressure from the correction device.
実施例
以下、本発明の一実施例を図面に基づいて説明する。第
１図〜第２図において、水平方向に配置される対象管１
の管軸心方向に沿って複数の管外径計測装置２が設けら
れている。この管外径計測装置２は、管軸心を介して左
右の位置に立設された一対の支軸３．４と、一方の支軸
３に螺合して上下一対配置されるレーザ投光部５と、他
方の支軸４に螺合して上下一対がそれぞれレーザ投光部
５に対向して配置されるレーザ受光部６と、両支軸３．
４に連動連結された駆動装置７とを備えている。そして
、レーザ投光部５とレーザ受光部６とによってセンサ部
８が形成されており、このセンサ部８の光軸８ａは、水
平でかつ管軸心と直交する方向に形成される。また、支
軸３．４と駆動装置７とでセンサ部駆動装置９が形成さ
れており、このセンサ部駆動装置９は支軸３．４の回転
により、両センサ部８を離間させて、上方に位置する光
軸８ａを対象管ｌの管上端縁に対応させるとともに、下
方に位置する光軸８ｂを対象管ｌの管下端縁に対応させ
るように構成されている。そして、センサ部駆動装置９
は凹型フレーム１０に設けられて゛おり、凹型フレーム
１０の重直辺１０ａに沿って移動するリニアスケール１
１が上部のセンサ部８のレーザ投光部５に取付けられて
いる。また、このリニアスケール１１は両センサ部８の
間の距離を測定するようになされている。そして、対象
管ｌの上方に位置して油圧ラム１２が配置されており、
油圧ラム１２は、管軸心方向に沿って設けられたガイド
レール１３に案内されて走行する台＄１４に支持されて
いる。そして、対象管１を下方で支持し、かつ管軸心ま
わりに回転させる回転装置１５が管軸心方向の前後に一
対配置されている。そして、両センサ部８は制御装置１
６に電気的に接続されており、この制御装置１６には、
油圧ラム１２の変位を検出する変位計１７と油圧ラム１
２の負荷を検出するロードセル１８とが動歪計１９を介
して電気的に接続されている。また、制御装＠１６には
、センサ部駆動装置９がドライブ回路２０を介して電気
的に接続され、リニアスケール１１がカウンター回路２
１を介して電気的に接続されている。さらに、制御装置
１６には、油圧ラム１２を作動させる油圧ポンプ２２の
送油管２３の途中に介在されたサーボバルブ２４が、電
気的に接続されている。そして、制御装＠１６には、モ
ニター２６とディスクドライブ２７とプリンター２８と
が接続されており、ディスクドライブ２７でデータを保
存し、プリンター２８で結果を出力する。EXAMPLE Hereinafter, an example of the present invention will be described based on the drawings. In Figs. 1 and 2, the target pipe 1 is arranged horizontally.
A plurality of tube outer diameter measuring devices 2 are provided along the tube axis direction. This pipe outer diameter measuring device 2 consists of a pair of support shafts 3.4 erected at left and right positions across the pipe axis, and a pair of upper and lower laser beams that are screwed onto one of the support shafts 3. part 5, a laser light receiving part 6 which is screwed onto the other support shaft 4 and is disposed with a pair of upper and lower parts facing the laser projecting part 5, and both support shafts 3.
4 and a drive device 7 operatively connected to the drive unit 4. A sensor section 8 is formed by the laser projecting section 5 and the laser receiving section 6, and the optical axis 8a of the sensor section 8 is horizontal and perpendicular to the tube axis. Further, the sensor section drive device 9 is formed by the support shaft 3.4 and the drive device 7, and the sensor section drive device 9 moves the two sensor sections 8 apart by the rotation of the support shaft 3.4 and moves upward. The optical axis 8a located below corresponds to the upper edge of the target tube l, and the optical axis 8b located below corresponds to the lower edge of the target tube l. Then, the sensor unit driving device 9
is provided on the concave frame 10, and the linear scale 1 moves along the vertical side 10a of the concave frame 10.
1 is attached to the laser projecting section 5 of the upper sensor section 8. Further, this linear scale 11 is designed to measure the distance between both sensor sections 8. A hydraulic ram 12 is disposed above the target pipe l,
The hydraulic ram 12 is supported by a stand $14 that runs while being guided by a guide rail 13 provided along the tube axis direction. A pair of rotating devices 15 that support the target tube 1 below and rotate it around the tube axis are arranged at the front and rear in the tube axis direction. Both sensor sections 8 are connected to the control device 1.
6, and this control device 16 includes:
A displacement gauge 17 that detects the displacement of the hydraulic ram 12 and a hydraulic ram 1
A load cell 18 for detecting the load of No. 2 is electrically connected via a dynamic strain meter 19. Further, the sensor unit driving device 9 is electrically connected to the control device @16 via the drive circuit 20, and the linear scale 11 is connected to the counter circuit 2.
They are electrically connected via 1. Furthermore, a servo valve 24 interposed in the middle of an oil feed pipe 23 of a hydraulic pump 22 that operates the hydraulic ram 12 is electrically connected to the control device 16 . A monitor 26, a disk drive 27, and a printer 28 are connected to the control device @16, and the disk drive 27 stores data and the printer 28 outputs results.
以下、上記構成における作用について説明する。Hereinafter, the effects of the above configuration will be explained.
まず、対象管１を回転装置１５の上に配置し、センサ部
駆動装置９により両センサ部８を離間させ、上方に位置
する光軸８ａを対象管ｌの管上端縁に対応させるととも
に、下方に位置する光軸８ｂを対象管１の管下端縁に対
応させる。このとき、第３図に示すように、レーザ投光
部５から投光されるレーザ光は、上下方向に所定巾をも
って投光され、一部が対象管ｌに遮られてレーザ受光部
６に到達する。そして、この状態における両センサ部８
の間の距離であるセンサ位ｉＸ。を、リニアスケール１
１とカウンター回路２１とで検出し、その値を制御装置
１６に送って記憶する。次に、回転装置１５により対象
管１を回転させながら、上方に位置するレーザ受光部６
で受光される上部センサ出力ｘ１と、下方に位置するし
゛−ザ受光部６で受光される下部センサ出力ｘ２とが制
御装置１６に送られる。そして、下記に示す計算が制御
装置１６において演算される。First, the target tube 1 is placed on the rotating device 15, and both sensor sections 8 are separated by the sensor section drive device 9, so that the optical axis 8a located above corresponds to the upper edge of the target tube 1, and the lower The optical axis 8b located at is made to correspond to the lower end edge of the target tube 1. At this time, as shown in FIG. 3, the laser beam projected from the laser projecting section 5 is projected with a predetermined width in the vertical direction, and a portion is blocked by the target tube l and reaches the laser receiving section 6. reach. Both sensor sections 8 in this state
sensor position iX, which is the distance between , linear scale 1
1 and the counter circuit 21, and sends the value to the control device 16 and stores it. Next, while rotating the target tube 1 with the rotation device 15, the laser light receiving section 6 located above is rotated.
The upper sensor output x1 received by the laser light receiving section 6 located below and the lower sensor output x2 received by the laser light receiving section 6 located below are sent to the control device 16. Then, the calculation shown below is performed in the control device 16.
すなわち、真円性を判断する値として、外径ｄ二ＸＯ−
Ｘｉ −Ｘ２
平均径ｄ ＝Ｊ、 ｄ＋ ／ Ｎ
楕円Ｒ＝ ｄｍ□−ｄｍｉｎ
が計算される。また、真直性を判断する値としての曲り
量（ＢＥＮＤ） Ｂを求める式は、Ｙ ＝ ｄ／ ２
十Ｘｚ ”” （Ｘｏ ＸＩ Ｘ２ ）／ ２＋Ｘ
２＝ ＸＯ／ ２ ＋（Ｘ２ Ｘ＋ ）／ ２ここで
Ｘ２− Ｘｌ ＝ ｚとすると
Ｂ ” （Ｙｍａｘ Ｙ、ｎ１ｎ）／２ ＝ＣＺｍａｘ
Ｚｍｔｏ）／’である。また、このとき局方向にお
ける楕円位置および曲がり位置も算出される。尚、計測
は対象管ｌが１回転する間において行われる。ちなみに
、第４図は外径ｄの計測処理結果の一例を示すものであ
り、この図においては、ＡＮＧＬＥが２７ｓ（ｄｅｇ）
のときに、外径ｄが最大外径ｄ ｍｒａｘの１６９．２
４（１圃）となり、ＡＮＧＬＥが１９４ （ｄｅｇ ）
のときに、外径ｄが最小外径ｄ ｍｉｎの１６８．５１
（ｍｍ） となる。そして、算出された平均径ｄ１楕
円Ｒ１曲がり量Ｂから真円性および伸直性を判断し、餐
品としての良否を判定するとともに、良品については、
さらに矯正の要否を判定する。そして、矯正の必要があ
ると判定した場合には、制御装置１６から発せられる矯
正指令に基づいて、回転装置１５が駆動され、曲がり量
が最大となる位置を１下方向に向けて対象管１が配置さ
れる。そして、台車１４の走行により油圧ラム１２を移
動させ、矯正を行う位置に対応させる。次に、油圧ラム
１２を作動させて、対象管１に試負荷を与える。このと
き、変位計１７と、ロードセル１８と、動歪計１９とで
計測される荷重とたわみの関係は、第５図に示すように
なる。すなわち、荷重−たわみ曲線Ｘの傾向が直線ＰＱ
として表わされる。In other words, the outer diameter d2XO-
Xi −X2 average diameter d = J, d+ / N ellipse R = dm□−dmin is calculated. Also, the formula for determining the amount of bend (BEND) B, which is a value for determining straightness, is Y = d/2
10Xz ”” (Xo XI X2) / 2+X
2= XO/ 2 + (X2 X+ )/ 2 Here, if X2-
Zmto)/'. At this time, the ellipse position and bending position in the station direction are also calculated. Note that the measurement is performed while the target tube I rotates once. By the way, Fig. 4 shows an example of the measurement processing result of the outer diameter d, and in this figure, ANGLE is 27s (deg).
When , the outer diameter d is 169.2 of the maximum outer diameter d mrax
4 (1 field) and ANGLE is 194 (deg)
When , the outer diameter d is the minimum outer diameter d min of 168.51
(mm). Then, the roundness and straightness are determined from the calculated average diameter d1 ellipse R1 bending amount B, and the quality of the food item is determined.
Furthermore, it is determined whether or not correction is necessary. If it is determined that correction is necessary, the rotating device 15 is driven based on the correction command issued from the control device 16, and the target tube is moved downward by 1° to the position where the amount of bending is maximum. is placed. Then, the hydraulic ram 12 is moved by the traveling of the truck 14 to correspond to the position where correction is to be performed. Next, the hydraulic ram 12 is operated to apply a trial load to the target pipe 1. At this time, the relationship between the load and deflection measured by the displacement meter 17, load cell 18, and dynamic strain meter 19 is as shown in FIG. In other words, the tendency of the load-deflection curve X is a straight line PQ
It is expressed as
そして、矯正必要量に見合った永久たわみをδｄ＝ＯＴ
として、ＴからＰＱに平行な直線ｅを求める。Then, the permanent deflection commensurate with the amount of correction required is δd=OT
, find a straight line e parallel to PQ from T.
次に、油圧ラム１２により本矯正に見合う負荷を対象管
１に加える。すなわち、荷重−たわみ曲線Ｘ′が４と交
わる点Ｓで負荷を停止して除荷する。このことにより、
永久たわみδｅ ＝ ＯＴＩが発生し、このときδｅｚ
δｄ となる。そして、再度計測を行い、矯正不要と判
定されるまで上記動作を繰返す。ちなみに、第６図は上
記した動作のフローチャート図である。したがって、こ
の実施例によれば、複数種類の対象管ｌに対応して管外
径の計測および、計測結果に基づいた矯正を行うことが
できる。Next, a load commensurate with the main straightening is applied to the target pipe 1 by the hydraulic ram 12. That is, the load is stopped and unloaded at the point S where the load-deflection curve X' intersects 4. Due to this,
Permanent deflection δe = OTI occurs, and at this time δez
δd. Then, the measurement is performed again and the above operation is repeated until it is determined that no correction is necessary. Incidentally, FIG. 6 is a flowchart of the above-mentioned operation. Therefore, according to this embodiment, it is possible to measure the outer diameter of a plurality of types of target tubes 1 and perform correction based on the measurement results.
発明の効果
以上述べたごとく、本発明によれば、センサ部を適当に
離間させることにより、外径が異なる複数種類の対象管
に対応して管外径の計測を行うことができる。そして、
計測された値から制御装置にて対象管の真円性および真
直性を判断し、矯正装置による抑圧によって矯正するこ
とができる。Effects of the Invention As described above, according to the present invention, by appropriately spacing the sensor sections, it is possible to measure the outer diameter of a plurality of tubes having different outer diameters. and,
The control device determines the roundness and straightness of the target tube from the measured values, and the tube can be corrected by compression using the correction device.
第１図は本発明の一実施例を示す全体構成図、第２図は
第１・図のＡ−Ａ矢視図、第３図は計測状態を示す図、
第４図は計測処理結果を示す図、第５図は矯正作用を示
す図、第６図は本発明の一実施例の手順を示すフローチ
ャート図である。
１・・・対象管、２・・・管外径計測装置、５・・・レ
ーザ投光部、６・・・レーザ受光部、８・・・センサ部
、９・・・センサ部駆動装置、１１・・・リニアスケー
ル、１２・・・油圧ラム、１５・・・回転装置、１６・
・・制御装置。Fig. 1 is an overall configuration diagram showing one embodiment of the present invention, Fig. 2 is a view taken along the line A-A in Fig. 1, and Fig. 3 is a diagram showing a measurement state.
FIG. 4 is a diagram showing the measurement processing results, FIG. 5 is a diagram showing the correction action, and FIG. 6 is a flow chart diagram showing the procedure of an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Target pipe, 2...Pipe outer diameter measuring device, 5...Laser emitter, 6...Laser light receiver, 8...Sensor part, 9...Sensor part drive device, 11... Linear scale, 12... Hydraulic ram, 15... Rotating device, 16...
··Control device.
Claims (1)
りに回転させる回転装置と、管の上方に位置して管軸心
方向に移動自在に設けられ、管を下方に押圧する矯正装
置と、管軸心方向に沿って複数配置される管外径計測装
置と、この管外径計測装置に設けられ、水平でかつ管軸
心と直交する方向の光軸を形成し、上下に一対配置させ
るセンサ部と、両センサ部を上下に離間させて、上方に
位置する光軸を管上端縁に対応させるとともに、下方に
位置する光軸を管下端縁に対応させるセンサ部駆動装置
と、両センサ部の間の距離を測定するスケール部と、回
転装置および矯正装置の駆動を制御するとともに、セン
サ部およびスケール部で検出される値にもとづいて対象
管の真円性および真直性を判断する制御装置とを備えた
ことを特徴とする管外径計測および曲がり矯正を行う装
置。1. A rotation device that supports the target tube in the horizontal direction and rotates it around the tube axis, and a straightening device that is located above the tube and is movable in the tube axis direction and presses the tube downward. , a plurality of tube outer diameter measuring devices arranged along the tube axis direction, and a pair of tube outer diameter measuring devices installed on the tube outer diameter measuring devices that form a horizontal optical axis in a direction perpendicular to the tube axis, and arranged in pairs above and below. a sensor part driving device which vertically separates both sensor parts so that the optical axis located above corresponds to the upper edge of the tube and the optical axis located below corresponds to the lower edge of the tube; A scale unit that measures the distance between the sensor units, controls the drive of the rotation device and the straightening device, and determines the roundness and straightness of the target tube based on the values detected by the sensor unit and the scale unit. A device for measuring the outer diameter of a pipe and correcting bending, characterized by comprising a control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63023363A JPH0753294B2 (en) | 1988-02-02 | 1988-02-02 | Device for measuring pipe outer diameter and straightening |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63023363A JPH0753294B2 (en) | 1988-02-02 | 1988-02-02 | Device for measuring pipe outer diameter and straightening |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01197011A true JPH01197011A (en) | 1989-08-08 |
| JPH0753294B2 JPH0753294B2 (en) | 1995-06-07 |
Family
ID=12108484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63023363A Expired - Lifetime JPH0753294B2 (en) | 1988-02-02 | 1988-02-02 | Device for measuring pipe outer diameter and straightening |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0753294B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102489555A (en) * | 2011-12-08 | 2012-06-13 | 常州耐尔特精密工具有限公司 | Bent pipe straightening device |
| CN104807421A (en) * | 2015-04-10 | 2015-07-29 | 西北工业大学 | Automatic detection device for relative position of component after forming of tow belt forming |
| US9283605B2 (en) | 2010-05-05 | 2016-03-15 | Greenlee Textron Inc. | Pivoting conduit bender |
| CN106623511A (en) * | 2017-01-20 | 2017-05-10 | 盐城工学院 | Hydraulic straightening equipment and system |
| CN107649543A (en) * | 2017-10-26 | 2018-02-02 | 郑州友联智能装备有限公司 | A kind of gun tube intelligent correction system |
| CN113579009A (en) * | 2021-07-23 | 2021-11-02 | 青岛中车四方轨道车辆有限公司 | Fan impeller static balance detection and correction equipment and use method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5971108U (en) * | 1982-11-05 | 1984-05-15 | 新日本製鐵株式会社 | Optical high-precision dimension measuring device |
| JPS6032531A (en) * | 1983-08-03 | 1985-02-19 | Fanuc Ltd | Ac electric machine and manufacture thereof |
| JPS61108425A (en) * | 1984-10-31 | 1986-05-27 | Nissho Seikou Kk | Shape correcting device of annular body |
| JPS61149810A (en) * | 1984-12-24 | 1986-07-08 | Nippon Steel Corp | Measuring instrument for external diameter |
-
1988
- 1988-02-02 JP JP63023363A patent/JPH0753294B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5971108U (en) * | 1982-11-05 | 1984-05-15 | 新日本製鐵株式会社 | Optical high-precision dimension measuring device |
| JPS6032531A (en) * | 1983-08-03 | 1985-02-19 | Fanuc Ltd | Ac electric machine and manufacture thereof |
| JPS61108425A (en) * | 1984-10-31 | 1986-05-27 | Nissho Seikou Kk | Shape correcting device of annular body |
| JPS61149810A (en) * | 1984-12-24 | 1986-07-08 | Nippon Steel Corp | Measuring instrument for external diameter |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10449587B2 (en) | 2010-05-05 | 2019-10-22 | Greenlee Tools, Inc. | Pivoting conduit bender |
| US11400503B2 (en) | 2010-05-05 | 2022-08-02 | Greenlee Tools, Inc. | Circuit for conduit bender |
| US9283605B2 (en) | 2010-05-05 | 2016-03-15 | Greenlee Textron Inc. | Pivoting conduit bender |
| US9375773B2 (en) | 2010-05-05 | 2016-06-28 | Textron Innovations Inc. | Circuit for conduit bender |
| US11858028B2 (en) | 2010-05-05 | 2024-01-02 | Greenlee Tools, Inc. | Method of bending a conduit |
| US10478881B2 (en) | 2010-05-05 | 2019-11-19 | Greenlee Tools, Inc. | Circuit for conduit bender |
| CN102489555A (en) * | 2011-12-08 | 2012-06-13 | 常州耐尔特精密工具有限公司 | Bent pipe straightening device |
| CN104807421A (en) * | 2015-04-10 | 2015-07-29 | 西北工业大学 | Automatic detection device for relative position of component after forming of tow belt forming |
| CN106623511B (en) * | 2017-01-20 | 2019-11-05 | 盐城工学院 | A kind of hydraulic flattening equipment and system |
| CN106623511A (en) * | 2017-01-20 | 2017-05-10 | 盐城工学院 | Hydraulic straightening equipment and system |
| CN107649543A (en) * | 2017-10-26 | 2018-02-02 | 郑州友联智能装备有限公司 | A kind of gun tube intelligent correction system |
| CN107649543B (en) * | 2017-10-26 | 2023-09-29 | 郑州万达重工股份有限公司 | Intelligent gun barrel correction system |
| CN113579009A (en) * | 2021-07-23 | 2021-11-02 | 青岛中车四方轨道车辆有限公司 | Fan impeller static balance detection and correction equipment and use method thereof |
| CN113579009B (en) * | 2021-07-23 | 2023-09-08 | 青岛中车四方轨道车辆有限公司 | Fan impeller static balance detection and correction equipment and using method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0753294B2 (en) | 1995-06-07 |
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