US3592690A - Method for pickling coils - Google Patents

Method for pickling coils Download PDF

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Publication number
US3592690A
US3592690A US787852A US3592690DA US3592690A US 3592690 A US3592690 A US 3592690A US 787852 A US787852 A US 787852A US 3592690D A US3592690D A US 3592690DA US 3592690 A US3592690 A US 3592690A
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US
United States
Prior art keywords
pickling
coils
vibration
coil
supporting device
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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
US787852A
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English (en)
Inventor
Rudolf Schoffmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voestalpine AG
Voest AG
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Voestalpine AG
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Filing date
Publication date
Application filed by Voestalpine AG filed Critical Voestalpine AG
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Publication of US3592690A publication Critical patent/US3592690A/en
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G3/00—Apparatus for cleaning or pickling metallic material
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts

Definitions

  • the present invention relates to a method for pickling coils, which are suspended on a supporting device, immersed into a pickling bath and subjected to vibration by vibrators acting on said supporting device.
  • the pickling periods required for pickling tight coils of strip or wire are relatively long, as the individual windings of the coils are in close proximity in respect of one another. It is, therefore, not possible to safeguard free access of acid and exchange of acid, and consequently the pickling results obtained are not uniform; if the pickling operation is sustained for a period of time long enough to enable access of acid ibetween the adjacent surfaces, other portions of the coil will be overpickled.
  • Another known method for pickling coils and bundles consists in that the individual windings of a coil or the individual rods of a rod bundle are set in natural vibration by resonance and are thus caused to vehemently move in the pickling bath.
  • different frequencies must be employed, or else an entire frequency range must be run through, possibly more than once, so that the different elements of the material to be pickled are consecutively set vibrating.
  • vibration nodes always form in those areas of the coil which contact with the support, wherefore less pickled spots are always found therein. Other portions, which move vehemently during resonance, show intensified pickling effects.
  • the overall pickling results vary over the cross section of the coil.
  • the present invention has as its object to avoid these disadvantages and difficulties and consists in that during the period of operation the vibration frequency is kept beyond the natural frequencies inherent in the vibratile parts, i.e. the individual windings of the coils, and that the vibration amplitude, in correspondence with the frequency, is so selected that the fall acceleration of the material to be pickled is exceeded and consequently to enable a short-time take-off of the material from the 3,592,690 Patented July 13, 1971 supporting device.
  • a constant frequency preferably below 16 Hz.
  • the supporting device may be suspended on soft springs or rubber elastic elements and fixedly connected to vibrators, particularly unbalance motors.
  • the supporting surface of the supporting device which the coil engages is preferably designed to have fiat flutes.
  • the method of the invention has the advantage that the contact and support areas of the individual coil windings move asunder, whenever for a short period of time a coil takes off from the supporting device, whereby fresh acid or the respective other liquid used is sucked in between those areas. Moreover, the areas of contact of the individual coil windings vary with every vibration. In this manner the method of the invention enables uniform pickling results over the entire surface of the coil and considerably shortens the pickling period.
  • the vibrators which frequency must be selected so as to safeguard that neither the coil windings nor parts of the pickling device or the environments thereof are in resonance.
  • any frequency may be chosen which meets the basic requirements that the energy of vibration is large enough to enable take-off of the supporting device from the coils.
  • the maintenance of a frequency below 16 Hz. safeguards smooth operation of the apparatus.
  • Suspension of the supporting devices on resilient springs or rubber elastic elements, the supporting device being directly connected to the vibrators has the advantage that the transmission of uncontrollable forces to the supporting device or to the basement is avoided. Since during the vibration the material to be pickled takes off shortly from the support, the supporting device should be kept in horizontal direction, in order to avoid egression of the material to be pickled. If the supporting surface for the coils is flatly fluted this tendency toward egression is reduced, as even in slanting position of the supporting device the material to be pickled is retained on the ridges.
  • a rail-supported transport vehicle 1 carries a hoist having two free rope ends, with a double-block arrangement on either side.
  • One rope of each pair runs over the pulley 2 and holds the supporting device 5 in the position desired.
  • the supporting device 5 is designed as a hanger with pickling hook 6 and suspended on soft draw springs 3.
  • vibration-inducing unbalance motors 4 are arranged on both sides of the supporting device.
  • the dot-and-dash lines indicate the coil 7 hanging on the pickling hook.
  • the supporting surface of the hook 6 is flatly fluted, i.e. designed to have flat tops and clales as indicated by numeral 8, the forward end of the hook 6 is provided with a step-like elevation 9 preventing the coil 7 from sliding off or egress ing during pickling.
  • a method for pickling elongated stock wound to coils which are suspended on a supporting device to be immersed into a pickling bath comprising subjecting said coils to vibration by vibrators acting on said supporting device, the improvement comprising the employment during operation of a vibration frequency which lies beyond the spectrum of natural frequencies of vibration inherent in the windings of said coils, and the employment of a vibration amplitude selected in dependence on said vibration frequency so as to be large enough to exceed fall acceleration of said coils and to consequently enable a a short-time take-off of said coils from said supporting device.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
US787852A 1968-01-11 1968-12-30 Method for pickling coils Expired - Lifetime US3592690A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT27968A AT290245B (de) 1968-01-11 1968-01-11 Verfahren zum Beizen von Bunden

Publications (1)

Publication Number Publication Date
US3592690A true US3592690A (en) 1971-07-13

Family

ID=3486313

Family Applications (1)

Application Number Title Priority Date Filing Date
US787852A Expired - Lifetime US3592690A (en) 1968-01-11 1968-12-30 Method for pickling coils

Country Status (7)

Country Link
US (1) US3592690A (de)
AT (1) AT290245B (de)
BE (1) BE725767A (de)
DE (1) DE1814949C3 (de)
FR (1) FR1593327A (de)
GB (1) GB1243639A (de)
SE (1) SE345483B (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4067561A (en) * 1975-12-22 1978-01-10 Vereinigte Osterreichische Eisen- Und Stahlwerke - Alpine Montan Aktiengesellschaft Arrangement for pickling bundled material
US4402757A (en) * 1980-02-18 1983-09-06 Kobe Steel, Limited Method of vibrating coiled wires
WO1991011561A1 (en) * 1990-02-02 1991-08-08 Thore Johnsen Improved road barrier
AT405620B (de) * 1995-10-24 1999-10-25 Voest Alpine Ind Anlagen Einrichtung zum behandeln eines bundes in einem tauchbad
US6257255B1 (en) * 1996-10-24 2001-07-10 Steag Microtech Gmbh Substrate treatment device

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4091827A (en) * 1976-08-16 1978-05-30 Kotaro Tsukamoto Edulcoration equipment for wire coils
AT395602B (de) * 1990-08-09 1993-02-25 Oesko Gmbh Vorrichtung zur oberflaechenbehandlung von metallischem gut in wenigstens einem tauchbad
US5645141A (en) * 1995-09-20 1997-07-08 Tseng; Shou Tang Hoist for roll material surface treatment

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4067561A (en) * 1975-12-22 1978-01-10 Vereinigte Osterreichische Eisen- Und Stahlwerke - Alpine Montan Aktiengesellschaft Arrangement for pickling bundled material
US4402757A (en) * 1980-02-18 1983-09-06 Kobe Steel, Limited Method of vibrating coiled wires
WO1991011561A1 (en) * 1990-02-02 1991-08-08 Thore Johnsen Improved road barrier
AT405620B (de) * 1995-10-24 1999-10-25 Voest Alpine Ind Anlagen Einrichtung zum behandeln eines bundes in einem tauchbad
US6257255B1 (en) * 1996-10-24 2001-07-10 Steag Microtech Gmbh Substrate treatment device

Also Published As

Publication number Publication date
DE1814949C3 (de) 1978-11-02
BE725767A (de) 1969-05-29
FR1593327A (de) 1970-05-25
DE1814949B2 (de) 1977-07-21
GB1243639A (en) 1971-08-25
SE345483B (de) 1972-05-29
AT290245B (de) 1971-05-25
DE1814949A1 (de) 1969-10-16

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