US3592690A - Method for pickling coils - Google Patents
Method for pickling coils Download PDFInfo
- 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
- Authority
- US
- United States
- Prior art keywords
- pickling
- coils
- vibration
- coil
- supporting device
- 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
Links
- 238000005554 pickling Methods 0.000 title abstract description 29
- 238000000034 method Methods 0.000 title abstract description 10
- 230000001133 acceleration Effects 0.000 abstract description 3
- 238000001228 spectrum Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 8
- 238000004804 winding Methods 0.000 description 8
- 239000002253 acid Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
Images
Classifications
-
- 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.
Landscapes
- 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)
Abstract
A METHOD FOR PICKLING COILS OF METAL STRIP OR WIRE WHEREIN THE COILS ARE CENTRALLY SUPPORTED, TO SUBMERGE INTO THE PICKLE, AND VIBRATION IS EMPLOYED TO PERIODICALLY SEPARATE THE COIL WINGINGS SO AS TO ENABLE ACCESS OF THE PICKLE THROUGHOUT THE WINDINGS. THE INVENTION TEACHES TO USE A VIBRATION FREQUENCY WHICH IS OUTSIDE THE SPECTRUM
OF NATURAL FREQUENCIES OF THE COIL WINDINGS, AND A MATCHED VIBRATION AMPLITUDE OF SUCH EXTENT THAT THE ACCELERATION OF FALL OF THE STOCK TO BE PICKLED IS EXCEEDED WHEREBY THE STOCK IS MOMENTARILY TAKEN OFF ITS SUPPORT.
OF NATURAL FREQUENCIES OF THE COIL WINDINGS, AND A MATCHED VIBRATION AMPLITUDE OF SUCH EXTENT THAT THE ACCELERATION OF FALL OF THE STOCK TO BE PICKLED IS EXCEEDED WHEREBY THE STOCK IS MOMENTARILY TAKEN OFF ITS SUPPORT.
Description
y 7 R. SCHOFFMANN METHOD FOR PICKLING COILS Filed Dec. 30, 1968 INVENTOR.
RUOOL 54 Ho FFMA NN w M w United States Patent @fice 3,592,690 METHOD FOR PICKLING COILS Rudolf Schoffmann, Linz, Austria, assignor to Vereinigte Osterreichische Eisenund Stahlwerke Akfiengesellshaft, Linz, Austria Filed Dec. 30, 1968, Ser. No. 787,852 Claims priority, application Austria, Jan. 11, 1968, A 279/68 Int. Cl. B08b 3/00, 7/00 US. Cl. 134-1 2 Claims ABSTRACT OF THE DISCLOSURE 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.
Apparatus for pickling have been proposed, e.g. pickling tippers, which subject the material in the bath to up-down and to-fro movement, respectively. Thereby the relative motion between the charge to be pickled and the acid is enhanced and the pickling period shortened, differences in the results of pickling arising from the close proximity of individual windings are, however, not avoided.
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. In order to effect resonance with different ring diameters or with different dimensions of the material to be pickled, 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. Furthermore, 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. Hence, follows that 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. During pickling a constant frequency, preferably below 16 Hz., is employed. 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.
During pickling one single frequency is employed for 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. In principle, 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.
In order that the invention may be more fully understood an embodiment thereof will now be described by way of example with reference to the accompanying drawing.
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. On both sides of the supporting device vibration-inducing unbalance motors 4 are arranged. 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.
What I claim is:
1. In 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.
2. The method set forth in claim 1, wherein during MORRIS O. WO-LK, Primary Examiner pickling a constant frequency below 16 Hz. is employed. W F FINNEY Assistant Examiner References Cited cl- UNITED STATES PATENTS 5 134 2, 3, 14, 157, 164 1,738,412 12/1929 Williams 13414X 3,449,163 6/1969 Mobius et a1. 1343X
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT27968A AT290245B (en) | 1968-01-11 | 1968-01-11 | Process for pickling coils |
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 (en) |
AT (1) | AT290245B (en) |
BE (1) | BE725767A (en) |
DE (1) | DE1814949C3 (en) |
FR (1) | FR1593327A (en) |
GB (1) | GB1243639A (en) |
SE (1) | SE345483B (en) |
Cited By (5)
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 (en) * | 1995-10-24 | 1999-10-25 | Voest Alpine Ind Anlagen | DEVICE FOR TREATING A BAND IN A DIP BATH |
US6257255B1 (en) * | 1996-10-24 | 2001-07-10 | Steag Microtech Gmbh | Substrate treatment device |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4091827A (en) * | 1976-08-16 | 1978-05-30 | Kotaro Tsukamoto | Edulcoration equipment for wire coils |
AT395602B (en) * | 1990-08-09 | 1993-02-25 | Oesko Gmbh | DEVICE FOR THE SURFACE TREATMENT OF METALLIC GOODS IN AT LEAST ONE DIP BATH |
US5645141A (en) * | 1995-09-20 | 1997-07-08 | Tseng; Shou Tang | Hoist for roll material surface treatment |
-
1968
- 1968-01-11 AT AT27968A patent/AT290245B/en not_active IP Right Cessation
- 1968-11-22 FR FR1593327D patent/FR1593327A/fr not_active Expired
- 1968-12-16 DE DE1814949A patent/DE1814949C3/en not_active Expired
- 1968-12-19 GB GB60486/68A patent/GB1243639A/en not_active Expired
- 1968-12-20 BE BE725767D patent/BE725767A/xx not_active IP Right Cessation
- 1968-12-30 US US787852A patent/US3592690A/en not_active Expired - Lifetime
-
1969
- 1969-01-03 SE SE34/69A patent/SE345483B/xx unknown
Cited By (5)
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 (en) * | 1995-10-24 | 1999-10-25 | Voest Alpine Ind Anlagen | DEVICE FOR TREATING A BAND IN A DIP BATH |
US6257255B1 (en) * | 1996-10-24 | 2001-07-10 | Steag Microtech Gmbh | Substrate treatment device |
Also Published As
Publication number | Publication date |
---|---|
DE1814949B2 (en) | 1977-07-21 |
SE345483B (en) | 1972-05-29 |
GB1243639A (en) | 1971-08-25 |
DE1814949A1 (en) | 1969-10-16 |
DE1814949C3 (en) | 1978-11-02 |
BE725767A (en) | 1969-05-29 |
FR1593327A (en) | 1970-05-25 |
AT290245B (en) | 1971-05-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3592690A (en) | Method for pickling coils | |
CA1135605A (en) | Method of vibrating coiled wires | |
US4210095A (en) | Machine for draining parts emerging from hot galvanizing baths | |
US3788618A (en) | Method and apparatus for cooling wire rod | |
US1965494A (en) | Cable dampener | |
JPS5531179A (en) | Plating and annealing apparatus for metal wire rod | |
SU1047550A1 (en) | Installation for washing articles | |
US3330690A (en) | Production of heavy metallic coatings on metallic strands | |
GB694971A (en) | Arrangement for treating metal parts | |
SU114879A1 (en) | The method of processing wire or tape ultrasound | |
DE1926911A1 (en) | Process and device for pickling wire coils and narrow band coils | |
JPH0219194B2 (en) | ||
GB718109A (en) | Improvements in and relating to the pickling of coils of metal strip | |
JPS5769127A (en) | Method of treating wire coil under vibration | |
JPS54114438A (en) | Vibrational immersion treatment of wire coil | |
JPS57123929A (en) | Continuous heat treatment furnace for steel wire rod | |
JPS57110623A (en) | Production of middle and high carbon steel wire rod | |
GB1389340A (en) | Suspending apparatus | |
GB991697A (en) | Machine for through quenching of rolled profiles especially of railway rails | |
JPS57154311A (en) | Descaling method of metallic wire rod | |
SU415146A1 (en) | ||
AT270334B (en) | Method and device for pickling | |
SU910850A1 (en) | Method for cleaning metal surface | |
SU1486431A1 (en) | Arrangement for conveying wire through liquid-filled bathes for processing purposes | |
Braszczynski et al. | Surface Tension of Liquid Iron After Vibration |