US3659075A - Magnetic control of arc in strip plating - Google Patents

Magnetic control of arc in strip plating Download PDF

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Publication number
US3659075A
US3659075A US6465A US3659075DA US3659075A US 3659075 A US3659075 A US 3659075A US 6465 A US6465 A US 6465A US 3659075D A US3659075D A US 3659075DA US 3659075 A US3659075 A US 3659075A
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United States
Prior art keywords
workpiece
strip
arc
set forth
plating
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 - Lifetime
Application number
US6465A
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English (en)
Inventor
Dieter Pellkofer
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Sulzer AG
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Sulzer AG
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Filing date
Publication date
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    • 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
    • B23K9/00—Arc welding or cutting
    • B23K9/04—Welding for other purposes than joining, e.g. built-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
    • B23K9/00—Arc welding or cutting
    • B23K9/08—Arrangements or circuits for magnetic control of the arc

Definitions

  • This invention relates to a plating apparatus and a method of plating.
  • I-Ieretofore it has been known to plate various members or workpieces by creating an electric are between the workpiece and a plating material such as a metal strip and by melting the strip in the are so as to deposit the melted material of the strip on the workpiece. It has also been known to move the workpiece relative to the plating material so as to deposit the melted material in a generally linear plating zone.
  • the arc has had a tendency to travel backwards and forwards across the width of the strip in an uncontrolled manner or has stopped still at one end of the melting edge. In either case, the strip melts unevenly and surface defects appear in the plating layer on the workpiece.
  • the invention provides an apparatus and method for plating which utilizes a magnetic field for controlling the electric are used to melt the plating material for depositing onto a workpiece.
  • This apparatus of the invention is used in combination with a workpiece to be plated, a plating material aligned over the workpiece and a means such as a welding rectifier for creating an electric are between the workpiece and plating material to melt the plating material.
  • the apparatus includes a flat coil which is positioned adjacent the plating zone with the long sides of the turns of the coil generally parallel with the plating zone and a current supply means arranged to supply the coil with pulsating current.
  • the plating method of the invention comprises the steps of striking an arc between the edge of a metal strip and the workpiece to melt metal from the edge of the strip, feeding the strip towards the workpiece as the strip is melted, moving the workpiece transversely relative to the strip, and controlling the arc by means of a magnetic field established by a flat coil located adjacent the arc and having the straight portions of its turns substantially parallel with the melting edge of the strip, the coil being supplied with a pulsating current.
  • flat coil as used herein is intended to refer to a coil which, in a plane perpendicular to the lines of magnetic forces through the coil, is substantially larger in one direction than in the direction perpendicular to this direction and the turns of the coil may therefore be said to have long sides and short sides.
  • FIG. 1 illustrates a simplified diagrammatic vertical section through an apparatus according to the invention
  • FIGS. 2 and 3 graphically illustrate two alternative forms of voltage fluctuation for the pulsating current delivered to the coil according to the invention.
  • FIG. 4 illustrates a second form of apparatus having a modified flat coil according to the invention.
  • a workpiece 1 which is to be plated and which may be a plate for the wall of a ferritic-steel vessel is mounted for movement by a traversing means (not shown) in the direction of an arrow 20 when the apparatus is in operation.
  • a strip 2, for example, of austenitic steel, is provided as the plating material and is mounted above the workpiece l.
  • the strip 2 is moved continuously downwards towards the workpiece 1 by two pairs of feed rolls 21.
  • the strip 2 is connected to the negative pole of a welding rectifier 3, of which the positive pole is connected to the workpiece I.
  • the lower end of the strip 2 is enclosed in a hopper 5 filled with welding flux 6.
  • the coil 10 In advance of the strip 2 with respect to the direction of advance of the workpiece l and in the vicinity of the melting edge, there is a flat coil 10, the straight portions of whose turns are substantially parallel to the melting edge of the strip 2.
  • the coil 10 has a core 11 of ferromagnetic material and is inclined at an angle of approximately 30 to the surface of the workpiece 1 to be plated.
  • the width of the coil is approximately equal to the width of the strip 2.
  • the coil 11 is connected to a generator 12 which functions to supply the coil 11 with a pulsating current having a voltage waveform as indicated in FIG. 2. This current may be periodically increasing and decreasing direct current or conventional alternating current.
  • the frequency of the current is adjustable in the generator 12. Also, preferably, the peak values E and E (FIG. 2) can be adjusted so that the zero-axis crossing of the current can be changed.
  • the inclination of the core 11 relative to the workpiece surface is such that the magnetic field induced by the current passing through the coil 10 has a plane of maximum magnetic force which passes through the workpiece surface at a point in the plating zone through which the arc 4 passes.
  • a direct-current voltage is applied as is known between the workpiece 1 and strip 2, and an are 4 is struck between these two components.
  • the are 4 causes the bottom edge of the strip 2 to melt, and the molten material is deposited in a generally linear plating zone beneath the bottom edge of the strip to form a plating layer 7 on the workpiece 1.
  • Some of the welding flux 6 also melts, forming a layer 8 of slag which is covered by a layer 9 of unmolten flux.
  • the are 4 travels back and forth across the width of the strip 2 in a controlled manner and so causes uniform melting.
  • the magnetic field produces a force proportional to the current in the are 4 since the are 4 acts as a conductor between the strip 2 and workpiece 1.
  • This force which is directed in a direction perpendicular to the are 4 (i.e., conductor) and to the magnetic field serves to propel the arc 4 across the gap between the strip 2 and workpiece 1.
  • the plane of maximum magnetic force is oriented to pass through the base or foot of the are 4 rather than at a point at the top of the are 4 as in the past, the are 4 is moved uniformly along the workpiece 1.
  • the generator 12 may be arranged to supply the coil 10 with a sawtooth waveform as shown in FIG. 3.
  • a voltage fluctuation of this kind makes the thickness of the plating layer 7 particularly uniform.
  • the flat coil 10 can have a core II which has a portion which projects below the coil and is curved about an axis 22 parallel to the melting edge and situated on the strip side of the core.
  • the core 11' may also have a portion which projects above the coil and is curved about an axis 23.
  • the core may be curved in such a way that the axis of curvature lies to the left of the strip 2 in FIG. 4, at point 24.
  • the forms of apparatus described may be used for plating without using welding flux, as FIG. 4 shows, or an inert gas or an inert-gas mixture may be fed to the melting edge instead of welding flux, the frequency of the pulsating current supplied to the flat coil possibly having values which are other than those stated above, and which can be obtained empirically.
  • a plating material strip mounted above said workpiece, and means for creating an electric are between said workpiece and said strip to melt said strip and to deposit a plating layer on said workpiece to one side of said strip in a generally linear plating zone; means between said workpiece and said strip for creating a magnetic field having a plane of maximum magnetic force passing through said workpiece at a point in said plating zone for imposing a force on said electric arc to move said electric arc across said workpiece.
  • said means includes a flat coil and a core of ferromagnetic material within said flat coil, said core having an end inclined with respect to said workpiece and said strip to direct said plane of maximum magnetic force towards the base of said are.
  • said means further includes a current supply means for supplying a pulsating current having predetermined peak values to said coil.
  • said current supply means includes means for adjusting the pulsating current in frequency.
  • said current supply means includes means for adjusting the peak values of the pulsating current.
  • said means includes a flat coil and a core of ferromagnetic material within said coil, said core having a curved end portion projecting from said coil and directed towards said workpiece to direct said plane of maximum magnetic force towards the base of said are.
  • a method of plating a workpiece which comprises the steps of moving the workpiece transversely relative to a metal strip, striking an are between an edge of the metal strip and the workpiece to melt the strip and deposit a plating layer on the workpiece to one side of the strip during movement of the workpiece, and creating a magnetic field having a plane of maximum magnetic force passing through the arc and the workpiece at a point below the metal strip to uniformly move the arc across the workpiece.
  • a method as set forth in claim 10 which further comprises the step of supplying flux to the vicinity of the arc during movement.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Coating With Molten Metal (AREA)
  • Arc Welding Control (AREA)
  • Electroplating Methods And Accessories (AREA)
US6465A 1969-01-29 1970-01-28 Magnetic control of arc in strip plating Expired - Lifetime US3659075A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH133369A CH508735A (de) 1969-01-29 1969-01-29 Vorrichtung zum Plattieren von metallischen Werkstücken mit Hilfe eines elektrischen Lichtbogens

Publications (1)

Publication Number Publication Date
US3659075A true US3659075A (en) 1972-04-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
US6465A Expired - Lifetime US3659075A (en) 1969-01-29 1970-01-28 Magnetic control of arc in strip plating

Country Status (7)

Country Link
US (1) US3659075A (OSRAM)
BE (1) BE745093A (OSRAM)
CH (1) CH508735A (OSRAM)
DE (1) DE1905770C3 (OSRAM)
FR (1) FR2029646A1 (OSRAM)
GB (1) GB1286444A (OSRAM)
NL (1) NL142880B (OSRAM)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3920948A (en) * 1973-01-09 1975-11-18 Hoogovens Ijmuiden Bv Method for repairing ingot stools
US3922519A (en) * 1973-06-19 1975-11-25 Japan Steel Works Ltd Method for a build-up welding of different metals
US4001461A (en) * 1973-03-30 1977-01-04 David Grigorievich Bykhovsky Method of producing electrode units for plasmatrons
DE2626824A1 (de) * 1975-07-17 1977-01-20 Combustion Eng Verfahren zum schweissplattieren
DE2626825A1 (de) * 1975-07-17 1977-01-20 Combustion Eng Verfahren und vorrichtung zum schweissplattieren
RU2237555C1 (ru) * 2003-03-26 2004-10-10 Башкирский государственный аграрный университет Способ наплавки электродной лентой
CN104334304A (zh) * 2012-04-03 2015-02-04 林肯环球股份有限公司 同步磁电弧操控与焊接
US10335884B2 (en) * 2016-04-28 2019-07-02 Illinois Tool Works, Inc. Cladding strip feeders having adjustable strip guide bearings and strip cladding systems with cladding strip feeders having adjustable strip guide bearings
CN111774695A (zh) * 2020-07-28 2020-10-16 北京中科普金特种材料技术发展有限公司 一种提高抗菌不锈钢焊缝抗菌性能的方法和装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5811317B2 (ja) * 1979-04-13 1983-03-02 川崎製鉄株式会社 水平エレクトロスラグ肉盛り溶接法
GB8315308D0 (en) * 1983-06-03 1983-07-06 Jenkins W N Arc deposition of metal onto substrate
DK94794A (da) * 1994-08-16 1996-02-17 Man B & W Diesel Gmbh Fremgangsmåde til belægning af et emne med et påsvejst lag, elektrode og svejseanlæg hertil samt et motor- eller maskinelement forsynet med et sådant lag
RU2140835C1 (ru) * 1997-07-04 1999-11-10 Башкирский государственный аграрный университет Способ наплавки электродной лентой

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US483425A (en) * 1892-09-27 Process of electric metal-welding
US2809277A (en) * 1955-08-23 1957-10-08 Union Carbide Corp Magnetically-impelled arc welding method and apparatus
US2809278A (en) * 1955-08-23 1957-10-08 Union Carbide Corp Method and apparatus for magnetically-impelled arc welding
US3130294A (en) * 1959-11-30 1964-04-21 Air Liquide Method for pre-heating a joint to be arc-welded

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US483425A (en) * 1892-09-27 Process of electric metal-welding
US2809277A (en) * 1955-08-23 1957-10-08 Union Carbide Corp Magnetically-impelled arc welding method and apparatus
US2809278A (en) * 1955-08-23 1957-10-08 Union Carbide Corp Method and apparatus for magnetically-impelled arc welding
US3130294A (en) * 1959-11-30 1964-04-21 Air Liquide Method for pre-heating a joint to be arc-welded

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3920948A (en) * 1973-01-09 1975-11-18 Hoogovens Ijmuiden Bv Method for repairing ingot stools
US4001461A (en) * 1973-03-30 1977-01-04 David Grigorievich Bykhovsky Method of producing electrode units for plasmatrons
US3922519A (en) * 1973-06-19 1975-11-25 Japan Steel Works Ltd Method for a build-up welding of different metals
DE2626824A1 (de) * 1975-07-17 1977-01-20 Combustion Eng Verfahren zum schweissplattieren
DE2626825A1 (de) * 1975-07-17 1977-01-20 Combustion Eng Verfahren und vorrichtung zum schweissplattieren
US4027135A (en) * 1975-07-17 1977-05-31 Combustion Engineering, Inc. Apparatus and method for submerged arc strip cladding of metallic work pieces
RU2237555C1 (ru) * 2003-03-26 2004-10-10 Башкирский государственный аграрный университет Способ наплавки электродной лентой
CN104334304A (zh) * 2012-04-03 2015-02-04 林肯环球股份有限公司 同步磁电弧操控与焊接
US10335884B2 (en) * 2016-04-28 2019-07-02 Illinois Tool Works, Inc. Cladding strip feeders having adjustable strip guide bearings and strip cladding systems with cladding strip feeders having adjustable strip guide bearings
CN111774695A (zh) * 2020-07-28 2020-10-16 北京中科普金特种材料技术发展有限公司 一种提高抗菌不锈钢焊缝抗菌性能的方法和装置

Also Published As

Publication number Publication date
DE1905770B2 (de) 1972-05-10
BE745093A (fr) 1970-07-28
NL6903160A (OSRAM) 1970-07-31
GB1286444A (en) 1972-08-23
DE1905770A1 (de) 1970-08-06
DE1905770C3 (de) 1975-10-23
CH508735A (de) 1971-06-15
FR2029646A1 (OSRAM) 1970-10-23
NL142880B (nl) 1974-08-15

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