WO2009140710A1 - Procédé et dispositif de réparation d'un dégât sur un substrat métallique - Google Patents

Procédé et dispositif de réparation d'un dégât sur un substrat métallique Download PDF

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Publication number
WO2009140710A1
WO2009140710A1 PCT/AT2009/000213 AT2009000213W WO2009140710A1 WO 2009140710 A1 WO2009140710 A1 WO 2009140710A1 AT 2009000213 W AT2009000213 W AT 2009000213W WO 2009140710 A1 WO2009140710 A1 WO 2009140710A1
Authority
WO
WIPO (PCT)
Prior art keywords
substrate
recess
filler
milling
cutter
Prior art date
Application number
PCT/AT2009/000213
Other languages
German (de)
English (en)
Inventor
Christian Reichhold
Original Assignee
Berndorf Band Engineering Gmbh
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 Berndorf Band Engineering Gmbh filed Critical Berndorf Band Engineering Gmbh
Publication of WO2009140710A1 publication Critical patent/WO2009140710A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/28—Portable welding equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/0013—Resistance welding; Severing by resistance heating welding for reasons other than joining, e.g. build up welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/002—Resistance welding; Severing by resistance heating specially adapted for particular articles or work
    • B23K11/004—Welding of a small piece to a great or broad piece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/04—Flash butt welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/02—Carriages for supporting the welding or cutting element
    • B23K37/0264—Carriages for supporting the welding or cutting element magnetically attached to the workpiece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P6/00—Restoring or reconditioning objects

Definitions

  • the invention relates to methods for repairing damage to a region of a first surface and / or below the first surface area with a damage to a metallic substrate, in particular an endless sheet-metal strip, as well as to a device for making a recess in a Substrate and for welding a filler.
  • a device for cutting and welding of circular blanks in a metal sheet is known.
  • Sheets which must have a particularly high surface quality, for example a roughness RH of 0.2 ⁇ m, are preferably used in double belt presses. The nature of the sheet causes the desired surface quality of the same during production, for example of chipboard.
  • a circular cutout showing the damage is removed from the belt for repair.
  • the corresponding cutting device is arranged on a guide, so that the circular cut-out can be particularly uniform.
  • a prefabricated sheet metal blank is used, which is held from below, for example with a copper plate. There then takes place an electrical welding with a TIG welding device and with the metal equivalent welding filler material.
  • the weld is cold forged, abraded to the thickness of the sheet metal strip, and then the weld is ground again.
  • This method is suitable for repairing major damage to the sheet metal strip.
  • Such circular blanks have for example a diameter of 300 mm.
  • this method is not suitable for small damage, such. B. from 30 microns to 200 microns, to repair.
  • Such small damage may preferably occur in welds, which may be present in the weld voids that simulate an intact weld, However, during prolonged operation can lead to the break-up of voids, so that then a damage to the surface arises.
  • DE 44 11 680 C1 describes a method for repairing defects in component surfaces of engine parts.
  • a part-spherical recess is made in the engine parts that are rigid, in which a ball is welded, which is then adapted to the natural body exactly fit.
  • a rigid body in which a recess is formed or ground, which is then filled with a spherical body, which is electrically connected to the component.
  • the object of the present invention is to provide a method or apparatus which is suitable for repairing relatively small damages, for example from 20 ⁇ m to 1 mm in diameter, and which is carried out quickly, simply and with particular accuracy can be, with the tape on which the repair is to take place in the system, for example, a double-belt system, may remain.
  • the inventive method for repairing damage to a region of a first surface and / or under the first surface area lying with a damage to a metallic substrate in particular an endless sheet metal strip wherein the area, in particular machined, z. B. by milling, is removed from the substrate, and in a circular recess thus obtained a metallic filler with the substrate, in particular electrically, is welded, followed by a, in particular machining, machining and optionally subsequently polished, and the substrate another Surface has, which lies opposite the first surface, consists essentially in the fact that in the production of the recess, the entire metallic substrate for the recess removed, in particular crushed, and before the another surface terminates, and a filler having a maximum diameter greater than that of the recess is welded.
  • the areas with damage should z. B. machined, in particular by milling but also with laser or electroerodating, are removed from the substrate to achieve a particularly accurate size limitation of the area to be repaired. With a circular recess no special insertion of the filler must be done, but the position of the filler can be chosen arbitrarily. As a result of the subsequent machining, in particular machining, a leveling can be achieved with respect to the subsequent first surface of the metallic substrate.
  • the recess is machined in its entirety by comminution of the entire metallic substrate in this area, a particularly accurate production of the recess can take place, as it is of particular importance for small dimensions, for example 30 .mu.m to 200 .mu.m.
  • the filling piece has a larger maximum diameter than that of the recess, then a particularly good filling of the recess by the filling piece can be achieved.
  • a rotationally symmetrical filler piece is welded in, a particularly simple insertion of the filler into the recess can take place.
  • an ellipsoid of revolution is present, then, for example, in the case of a milling cutter which partly has the shape of an ellipsoid of revolution, an exact fitting into the recess can take place, wherein only the axis of rotation of the ellipsoid of revolution should correspond to the imaginary axis of the milling cutter.
  • the filler piece is in the form of a ball, it can be inserted into the recess without rotation via axes of rotation or the like, and then welded in place.
  • the air between the recess and the filler can escape particularly well.
  • the device is held on the substrate during the milling of the recess, the welding and optionally subsequent milling on the substrate, in particular via electromagnets, an accurate positioning of the device can take place.
  • the attachment of the device to the substrate can be done, for example, via suckers made of rubber-elastic material. Holding by electromagnets can also be carried out with dia- and paramagnetic substances. It is only necessary that on the other side of the metallic substrate, an armature, such as a soft iron anchor, is arranged, which is held by the electromagnet, whereby at the same time the device is pressed against the substrate.
  • a particularly homogeneous repair of the damage can be achieved if a to the substrate of the same or provided with the same composition filler is welded.
  • the repair can be effected simply and quickly with equalization in the region of the damage.
  • the part of the filling piece which protrudes beyond the first surface is worked off with a milling cutter having a flat working surface which has a diameter which corresponds at least to the maximum diameter of the filling piece, then with one working operation and with only one position of the milling cutter by lowering the same in the direction of the first surface equalization done. This lowering can be stopped via a stop for the holder exactly in the plane of the first surface.
  • the bottom of the recess can also be adapted particularly well to the shape of the filler piece.
  • the apparatus according to the invention for carrying out the method according to the invention wherein the apparatus comprises a height-adjustable milling cutter and a height-variable electrode, in each case based on a first surface of a substrate, and a, in particular operated with compressed gas, motor is equipped for the cutter, essentially consists in that a, in particular height-adjustable, stop for the cutter for the recess is provided in its movement to the first surface of the substrate, and the electrode is a permanent electrode without Is welding consumables.
  • recesses having different depths can be produced with one and the same device, wherein the depth of the recess can be predetermined via a stop for the milling cutter, so that the required accuracy can be kept particularly simple.
  • the electrode without welding consumables can be done a simple and accurate electrical welding, the electrode only against the filler, in particular the vertex thereof, must be driven and brought into abutment.
  • the repair can be carried out with particularly high precision.
  • the milling of the cutout as well as the removal of the filling piece projecting beyond the first surface can be carried out with one position of the device.
  • Fig. 1 shows a section through the substrate with weld
  • Fig. 2 shows a device for milling and welding.
  • Fig. 1 is a section through a metallic substrate 1 with a roughness RH of 0.2 microns, namely a section of an endless steel strip with a chromium nickel steel with 15 wt .-% chromium, 7 wt .-% nickel, 0, 7 wt .-% copper and 0.4 wt .-% titanium, shown.
  • the thickness di of the metallic substrate is 2.00 mm.
  • the metallic substrate has a first surface 2 and a surface 3 opposite thereto.
  • the section through the substrate was carried out on a weld seam 4, which has a recess 5.
  • a spherical filler 6 is arranged, which has a radius R of 300 microns.
  • the filler 6 has an identical metallurgical composition as the metallic substrate.
  • the circular extent d 3 of the recess in the plane of the first surface 2 is approximately 480 ⁇ m.
  • the depth d 2 of the recess 5 is 120 ⁇ m, based on the plane of the first surface.
  • Fig. 2 the erf ⁇ ndungswashe device rests with a plate 7 on the first surface 2 of the metallic substrate 1.
  • the plate has electromagnets 8, which, if necessary, cooperate with a soft iron anchor, not shown, which can be arranged opposite the first surface 3 opposite surface.
  • the plate 7 carries a boom 9 with a cantilevered arm 10 in which a pivoting piece 11 is mounted. This pivoting piece 11 has notches, so that alternately at least one milling cutter 12 or a permanent electrode 13 can be pivoted into the same position above the first surface 2.
  • the cutter 12 with a concave spherical working surface 12a is fastened in a holder 14, which has a threaded piece 15 which cooperates with a threaded piece 16 surrounding this threaded piece 15 with a female thread.
  • This threaded piece 16 can be lowered and raised via a knurled nut 17, wherein the knurled nut 17 itself allows a fixable micro-adjustment for lowering and raising the cutter and a stepper motor with rotating cutter (not shown).
  • a stopper is formed.
  • a shaft 19 is guided, which is connected to the holder 14 and the motor 18.
  • the cylindrical shaft 19 has a hexagon at the upper end, which cooperates with a corresponding recess in the motor 18, so that the drive of the milling cutter is ensured in the different height positions.
  • the permanent electrode 13, which is connected as an anode, has a holder 20, with at its upper end a threaded piece 21 which cooperates with a further threaded piece 22, so that the knurled nut 23, the threaded piece 20 and thus the electrode on the vertex the filler can be lowered and lifted.
  • the knurled nut 23 is actuated via a stepper motor (not shown).
  • the device may also have another end mill with a flat working surface with a diameter of 2 mm, ie more than 600 microns, for removing the filler with the part which projects beyond the first surface, so that not lower than the position of the first surface corresponds , is milled off.
  • the weld 4 is od with a two-dimensional handheld microscope after superficial voids and visually for pores. The like. Examined. After finding an area with damage, the device with cutter and Permanentelelctrode is situated over the area to be repaired, and fixed with the electromagnets 8 in this position. Then, via the motor 18 operated by compressed air, the cutter 12 is set in rotation, and moved with the stepping motor in the direction of the first surface 2 until the holder 14 abuts the stop, formed by the threaded pieces 15, 16 and knurled nut 17, and the Depth d % of 120 microns is reached.
  • the milling cutter 12 has a concave working surface 12a, namely a spherical cap of a sphere with a diameter of 600 ⁇ m.
  • the spherical filler 6 is used with a diameter of 600 microns, which, as already stated, the same chemical composition as the metallic substrate 2, used.
  • the cutter 12 with the dome-shaped working surface 12a is raised before inserting the ball in the recess and rotated in a rest position.
  • a permanent electrode 13 is pivoted about the spherical filler 6 and then lowered to the apex of the filler. There is a current surge of 8.0 volts, 10.0 amps for 0.3 seconds.
  • the permanent electrode 13 is connected as an anode and the metallic substrate as a cathode. After welding the spherical filler 6 in the recess 5, the permanent electrode 13 is raised and then a face milling cutter over the area pivoted, which has a flat work surface. With this cutter, the protruding part of the filler is milled to the plane in which the first surface is located. Then, the area of remaining in the Ausnehr ⁇ ung portion of the spherical filler, z. B. manually polished with polishing paper.
  • the filler may also have the shape of an ellipsoid of revolution.
  • the recess can also take place with laser, by drilling, galvanic, wire eroding or the like by removing the material of the substrate.
  • the removal and polishing of the filler can mechanically but also z. B. by laser beams.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Milling Processes (AREA)

Abstract

L'invention concerne un procédé de réparation d'un dégât sur une zone d'une première surface (2) et/ou une zone située sous la première surface (2), d'un substrat métallique (1), notamment d'une bande de tôle continue. La zone est retirée du substrat (1) par enlèvement de matériau, notamment par fraisage, et une pièce de remplissage métallique (6) est soudée au substrat (1), notamment électriquement, dans la cavité circulaire (5) ainsi obtenue, un traitement par enlèvement de matériau étant ensuite réalisé, puis éventuellement un polissage. Le substrat (1) présente une autre surface (3) faisant face à la première surface (2), la cavité (5) étant réalisée intégralement par enlèvement de matériau et s'achevant devant l'autre surface (3), l'ensemble du substrat métallique (1) étant réduit. Une pièce de remplissage (6) présentant un diamètre maximal (2R) supérieur à celui (d3) de la cavité (5) étant soudé dans la cavité.
PCT/AT2009/000213 2008-05-21 2009-05-20 Procédé et dispositif de réparation d'un dégât sur un substrat métallique WO2009140710A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT8172008A AT506999A1 (de) 2008-05-21 2008-05-21 Verfahren und vorrichtung zur reparatur eines schadens an einem metallischen substrat
ATA817/2008 2008-05-21

Publications (1)

Publication Number Publication Date
WO2009140710A1 true WO2009140710A1 (fr) 2009-11-26

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PCT/AT2009/000213 WO2009140710A1 (fr) 2008-05-21 2009-05-20 Procédé et dispositif de réparation d'un dégât sur un substrat métallique

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AT (1) AT506999A1 (fr)
WO (1) WO2009140710A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011133050A1 (fr) * 2010-04-20 2011-10-27 Promotech Sp. Z.O.O. Procédé et dispositif pour découper des ouvertures dans des surfaces plates, concaves ou convexes
WO2014131070A1 (fr) 2013-02-27 2014-09-04 Berndorf Band Gmbh Procédé de réparation d'un dommage à un substrat métallique
WO2014134639A1 (fr) 2013-03-07 2014-09-12 Berndorf Band Gmbh Bande sans fin à corps en métal et procédé de contrôle de la taille des pores dans la surface de la bande côté extérieur
CN105598750A (zh) * 2015-11-09 2016-05-25 贝恩德·里曼 一种延长碳钢点焊电极头寿命的方法
CN118207764A (zh) * 2024-05-21 2024-06-18 浙江汉宇设计有限公司 一种城市轨道交通用养护装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5079400A (en) * 1990-12-17 1992-01-07 Eltech Systems Corporation Resistance welding tool
EP0561571A1 (fr) * 1992-03-19 1993-09-22 Jun Niinuma Procédé de soudage
DE4411680C1 (de) * 1994-04-05 1995-08-17 Mtu Muenchen Gmbh Verfahren zur Reparatur von Fehlstellen in Bauteiloberflächen
DE10256414A1 (de) * 2002-12-02 2004-06-09 Siemens Ag Verfahren zur Herstellung eines Bauteils

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5079400A (en) * 1990-12-17 1992-01-07 Eltech Systems Corporation Resistance welding tool
EP0561571A1 (fr) * 1992-03-19 1993-09-22 Jun Niinuma Procédé de soudage
DE4411680C1 (de) * 1994-04-05 1995-08-17 Mtu Muenchen Gmbh Verfahren zur Reparatur von Fehlstellen in Bauteiloberflächen
DE10256414A1 (de) * 2002-12-02 2004-06-09 Siemens Ag Verfahren zur Herstellung eines Bauteils

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011133050A1 (fr) * 2010-04-20 2011-10-27 Promotech Sp. Z.O.O. Procédé et dispositif pour découper des ouvertures dans des surfaces plates, concaves ou convexes
WO2014131070A1 (fr) 2013-02-27 2014-09-04 Berndorf Band Gmbh Procédé de réparation d'un dommage à un substrat métallique
CN105008084A (zh) * 2013-02-27 2015-10-28 百德福钢带有限公司 用于修复在金属基质上的损伤的方法
JP2016513018A (ja) * 2013-02-27 2016-05-12 ベルンドルフ バント ゲゼルシャフト ミット ベシュレンクテル ハフツング 金属基体における損傷を修理するための方法
WO2014134639A1 (fr) 2013-03-07 2014-09-12 Berndorf Band Gmbh Bande sans fin à corps en métal et procédé de contrôle de la taille des pores dans la surface de la bande côté extérieur
CN105598750A (zh) * 2015-11-09 2016-05-25 贝恩德·里曼 一种延长碳钢点焊电极头寿命的方法
CN118207764A (zh) * 2024-05-21 2024-06-18 浙江汉宇设计有限公司 一种城市轨道交通用养护装置

Also Published As

Publication number Publication date
AT506999A1 (de) 2010-01-15

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