WO2013015686A1 - Machine à fraiser destinée à usiner un joint soudé présent sur la surface intérieure d'un tube - Google Patents

Machine à fraiser destinée à usiner un joint soudé présent sur la surface intérieure d'un tube Download PDF

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Publication number
WO2013015686A1
WO2013015686A1 PCT/NL2012/050531 NL2012050531W WO2013015686A1 WO 2013015686 A1 WO2013015686 A1 WO 2013015686A1 NL 2012050531 W NL2012050531 W NL 2012050531W WO 2013015686 A1 WO2013015686 A1 WO 2013015686A1
Authority
WO
WIPO (PCT)
Prior art keywords
milling
machine
pipe
milling machine
controls
Prior art date
Application number
PCT/NL2012/050531
Other languages
English (en)
Inventor
Jan Schepers
Original Assignee
Hercules Piping Tools Engineering B.V.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hercules Piping Tools Engineering B.V. filed Critical Hercules Piping Tools Engineering B.V.
Publication of WO2013015686A1 publication Critical patent/WO2013015686A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C3/00—Milling particular work; Special milling operations; Machines therefor
    • B23C3/12—Trimming or finishing edges, e.g. deburring welded corners
    • B23C3/122—Trimming or finishing edges, e.g. deburring welded corners of pipes or cylinders
    • B23C3/124—Trimming or finishing edges, e.g. deburring welded corners of pipes or cylinders internally

Definitions

  • the invention relates to a milling machine for machining a welded joint at the inner surface of a pipe.
  • This object is achieved by providing a milling machine for machining a welded joint at the inner surface of a pipe, the machine having a tubular shape and being provided with roller supports at longitudinal ends of the machine, one of the roller supports being powered by a motor drive positioned near this roller support and milling means positioned between the roller supports.
  • the tubular shape allows easy insertion of the machine inside a pipe, whereas the roller supports provide guidance along the internal diameter of the pipe for guiding or transporting the milling machine to a desired location near the welded joint.
  • One of the roller supports is powered by a motor drive to enable propulsion of the tube-like milling machine along the length of the pipe.
  • a further embodiment concerns a milling machine, wherein clamping means are provided on both sides of the milling means, the milling means being rotatable around the longitudinal axis of the machine with respect to the clamping means via a motor drive.
  • Clamping means are provided for rigidly fixing the machine and the milling means with respect to the joint and for providing the required stability during milling operations.
  • the clamping means can be controlled remotely, and individually, and are movable from a locked position to an unlocked position. In the locked position the clamping means extend radially and firmly engage the inner surface of the pipe, in the unlocked position clamping means are retracted and disengage the inner surface of the pipe again.
  • the milling means are rotatable around the longitudinal axis of the machine with respect to the clamping means in order to be able to operate on the full inner circumference of the pipe and welded joint.
  • An embodiment concerns a milling machine, wherein the milling means are provided with cut depth adjustment means.
  • the cut depth adjustment means allow for adjusting the milling depth.
  • a further embodiment concerns a milling machine, wherein a suction unit is positioned near the milling means.
  • the suction unit removes waste material, such as metal curls, from the milling location.
  • a yet further embodiment relates to a milling machine, wherein visual recording means are positioned near the milling means.
  • visual recording means are positioned near the milling means.
  • the machine can advantageously be provided with visualization means, such as a camera.
  • the invention also relates to an operating terminal for operating a milling machine according to the invention, the terminal being provided with a screen for displaying an image recorded by the visual recording means, and operator controls for controlling operations of the milling machine.
  • the operating terminal is in
  • An embodiment relates to an operating terminal, wherein the operator controls comprise cut depth adjustment controls, motor drive controls, clamping means controls, milling speed controls, a main switch and an emergency stop. These controls allow an operator to optimally control the most relevant operational parameters.
  • the milling machine and the operating terminal with cabinet can be packed for transport in boxes. Unpacking at location can be done with a sufficiently capable crane and lifting rope.
  • Fig. 1 shows a preferred embodiment of a milling machine according to the invention
  • Fig. 2 shows a cross-section of a pipe with a welded pipe joint before and after milling.
  • Fig. 1 shows a preferred embodiment of a milling machine 10 according to the invention.
  • the milling machine 10 has a tubular shape allowing insertion of the milling machine 10 into a pipe.
  • the milling machine 10 comprises two clamp alignment units 1 for alignment with the pipe.
  • a milling drive 5a is rotatable around the longitudinal axis of the machine 10 with respect to the clamp alignment units 1 via a motor drive in order to be able to operate on the full inner circumference of the pipe and welded joint.
  • the clamp alignment units 1 enable the machine 10 to releasably clamp itself to the pipe, when the machining location has been reached, thereby allowing the fixation of the machine 10 with respect to the joint to be machined.
  • the clamp alignment units 1 are preferably driven by a motor drive and can be remotely controlled.
  • the clamp alignment units 1 are also used for centring the machine 10.
  • the clamp alignment units 1 are movable from a locked position to an unlocked position. In the locked position the clamp alignment units 1 extend radially and firmly engage the inner surface of the pipe, in the unlocked position the clamp alignment units 1 are retracted and disengage the inner surface of the pipe again.
  • the milling machine 10 furthermore comprises a travel unit 2, positioned between one of roller supports 3 and one of the clamp alignment units 1, for moving the machine 10 through the pipe to and from the desired milling location.
  • the travel unit 2 enables the machine 10 to travel at a speed of approximately 0 - 0.5 m/s.
  • the travel unit 2 makes it possible to move the machine 10 through the pipe for at least a distance of 20 m.
  • the roller supports 3 are mounted at both ends of the machine 10 for enabling easy guidance of the machine 10 along the inside of the pipe when moving.
  • the roller supports 3 are adjustable to different pipe diameters, e.g. by means of a spring.
  • the roller supports 3 each comprise guidance wheels positioned at even intervals along the circumference of the roller supports 3.
  • the roller supports 3 each are equipped with four guidance wheels under 90o along the circumference. Three guidance wheels, or another equivalent amount, can also be used.
  • the machine 10 comprises the milling drive 5a for the actual milling operations with metal cutting inserts, which can easily be replaced after use.
  • the milling drive 5a has a milling speed of approximately 350 mm/min.
  • a suction unit 5b is provided for removing for example metal curls and other waste material from the milling location.
  • a camera 5c is provided near the milling drive 5a, along with a lighting unit, for observing the milling operation.
  • the camera 5c is connected to a screen, such as a TFT-LCD 7" screen, mounted on an operator terminal.
  • the suction unit 5b and camera 5c preferably are also rotatable around the longitudinal axis of the machine 10, along with the milling tool 5a, with respect to the clamp alignment units 1.
  • the machine 10 comprises cut depth adjustment means 4 for adjusting the milling depth of the milling tool 5a at the welded joint. As the milling machine 10 is required to operate at the junction of pipes having a different internal diameter cut depth adjustment means are necessary.
  • the milling machine 10 is connected to an operator terminal (not shown) comprising an electrical cabinet mounted onto a mobile frame, the frame for example being provided with a number of wheels underneath, such as four, for this purpose. The operator terminal is positioned on the frame.
  • the operator terminal is provided with operator controls, such as the mentioned screen, cut depth adjustment controls, travel unit controls, clamping and centring controls, milling speed controls, a main switch, and an emergency stop.
  • the milling machine 10 as shown in Fig. 1 weighs about 550 kg and has a length of approximately 4000 mm. Furthermore, it is designed for milling pipe ends having internal diameters of 247 - 337 mm. After milling, the surface roughness achieved, Ra, is about 12.5 ⁇ .
  • Fig. 2 shows a cross-section of a pipe 20 with a welded pipe joint 21, 21 ' before and after milling. In the upper half of Fig.
  • the welded pipe joint 21 is shown before milling, in the lower half the welded pipe joint 21 ' is shown after milling.
  • a first pipe end 22, 22' on the left has a greater internal diameter than a second pipe end 23, 23' on the right to which it is connected via the joint 21, 21 '.
  • the joint 21 protrudes inwardly with respect to the first pipe end 22, having a protrusion thickness of twl, e.g. 2 mm, with respect to the first pipe end 22 and a protrusion thickness tw2, e.g. 1 mm, with respect to the second pipe end 23.
  • the lower half of Fig. 2 shows the joint 21 ' after milling, being significantly smoothened along a milling curve having a milling radius Rm, e.g of 30 mm.
  • the milling angle am as shown is about 15o.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling Processes (AREA)

Abstract

L'invention porte sur l'usinage des soudures. Elle a pour objet une machine à fraiser (10) destinée à usiner un joint soudé présent sur la surface interne d'un tube, la machine (10) ayant une forme tubulaire et étant équipée de supports à galets (3) aux extrémités longitudinales de la machine (10), l'un des supports à galets (3) étant alimenté en énergie par un entraînement à moteur (2) positionné près de ce support à galets (3) et des moyens de fraisage (5a) positionnés entre les supports à galets (3).
PCT/NL2012/050531 2011-07-28 2012-07-24 Machine à fraiser destinée à usiner un joint soudé présent sur la surface intérieure d'un tube WO2013015686A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201161512496P 2011-07-28 2011-07-28
US61/512,496 2011-07-28

Publications (1)

Publication Number Publication Date
WO2013015686A1 true WO2013015686A1 (fr) 2013-01-31

Family

ID=46640752

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL2012/050531 WO2013015686A1 (fr) 2011-07-28 2012-07-24 Machine à fraiser destinée à usiner un joint soudé présent sur la surface intérieure d'un tube

Country Status (1)

Country Link
WO (1) WO2013015686A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1912419A (en) * 1928-02-17 1933-06-06 Smith Corp A O Flash removing apparatus
US2025422A (en) * 1935-03-22 1935-12-24 Republic Steel Corp Inside burr remover
GB742162A (en) * 1953-01-09 1955-12-21 Babcock & Wilcox Co A new or improved inside bead trimmer for removing internal beads from welded tubes
GB2021727A (en) * 1978-05-19 1979-12-05 Nippon Kokan Kk Inner burr cutting and inner surface cleaning apparatus for long pipes of small and medium diameters
US4436974A (en) * 1981-08-13 1984-03-13 Institut Elektrosvarki Imeni E.O.Patona Akademii Nauk Ukrainskoi Ssr Pipe resistance butt welding apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1912419A (en) * 1928-02-17 1933-06-06 Smith Corp A O Flash removing apparatus
US2025422A (en) * 1935-03-22 1935-12-24 Republic Steel Corp Inside burr remover
GB742162A (en) * 1953-01-09 1955-12-21 Babcock & Wilcox Co A new or improved inside bead trimmer for removing internal beads from welded tubes
GB2021727A (en) * 1978-05-19 1979-12-05 Nippon Kokan Kk Inner burr cutting and inner surface cleaning apparatus for long pipes of small and medium diameters
US4436974A (en) * 1981-08-13 1984-03-13 Institut Elektrosvarki Imeni E.O.Patona Akademii Nauk Ukrainskoi Ssr Pipe resistance butt welding apparatus

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