CN101024890B - Wire material electroplating or pretreating heating technology - Google Patents

Wire material electroplating or pretreating heating technology Download PDF

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Publication number
CN101024890B
CN101024890B CN2007100084257A CN200710008425A CN101024890B CN 101024890 B CN101024890 B CN 101024890B CN 2007100084257 A CN2007100084257 A CN 2007100084257A CN 200710008425 A CN200710008425 A CN 200710008425A CN 101024890 B CN101024890 B CN 101024890B
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China
Prior art keywords
wire rod
wire
surface temperature
exchange current
pretreating
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CN2007100084257A
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CN101024890A (en
Inventor
孙建军
林志彬
陈小波
谢步高
陈国南
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Fuzhou University
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Fuzhou University
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Abstract

The invention provides a wire plating or pretreating heating process, directly applying AC at the two ends of a processed wire, so that the joule heat generated by the resistance of the wire makes the surface temperature of the wire reach the required working temperature. As compared with the traditional heating whole solution process, the invention can reduce the consumed electric energy by eleven times above, and can effectively avoid escape of harmful gases, reducing environmental pollution; besides, the surface temperature of the wire rises especially fast, effectively raising plating production efficiency.

Description

A kind of wire material electroplating or pretreating heating technology
Technical field
The present invention relates to the heating process in a kind of wire material electroplating or the pre-treatment.
Background technology
In wire material electroplating or pre-treatment, temperature control plays a part very important to plating or pretreating effect.Electroplate pre-treatment with regard to tradition, generally be to take to heat whole plating bath or preprocessing solution the plating piece surface temperature to be reached electroplate or pretreated temperature requirement, but because plating or pretreatment temperature are had relatively high expectations, for example, in acid cleaning process, Acidwash solution will be heated to 40~60 ℃ just can make wire rod reach etch preferably and activation effect.In alkaline cleaning procedure, in order to improve the degreasing effect of wire rod, the alkaline wash temperature will be heated to 60~80 ℃.Too high acid mist alkali mist and the obnoxious flavour of causing of whole solution temperature pollutes production plant, influences operator's health.It is big to heat whole solution power consumption in addition.
Summary of the invention
The present invention seeks to cause problems such as power consumption is big, seriously polluted, the heating process in a kind of wire material electroplating or the pre-treatment is provided at the whole heating process in above-mentioned wire material electroplating or the pre-treatment.
Heating process in a kind of wire material electroplating of the present invention or the pre-treatment is directly processed wire rod two ends to be applied exchange current, and the joule heating that is produced by the resistance of wire rod own makes its surface temperature reach required working temperature
Remarkable advantage of the present invention is:
Once. the heating process in traditional wire material electroplating of the present invention or the pre-treatment improves, and it is simple, easy to operate to improve processing step, and can improve plating production efficiency and pretreating effect greatly.
Two. the present invention is according to the specification of solution temperature needs, wire rod velocity of flow and the wire rod of reality, the graph of relation of contrast the wire rod exchange current by the different size wire rod or voltage swing and wire surface temperature variation under the current system of different in flow rate applies the exchange current or the voltage of a certain size and frequency to wire rod, and need not heat whole solution.Compare with overall heating means, institute's consumed power can reduce more than 10 times.Also can effectively avoid the effusion of obnoxious flavour simultaneously, reduce environmental pollution.
Description of drawings
Fig. 1 is the heating means synoptic diagram that flows in wire material electroplating or the preprocessing process.Wherein: 1. wire rod; 2. copper sheet; 3. voltage of alternating current; 4. plating bath or preprocessing solution; 5. copper wire; 6. coating bath or pretreatment tank; 7. wire rod flow direction.
Fig. 2 is that the Mild Steel Wire of 0.8mm passes through the exchange current value of steel wire and the temperature variation graph of relation of Steel Wire Surface for diameter under different in flow rate.Wherein: 8 is the temperature variation relation curve of the velocity of flow of steel wire exchange current value and Steel Wire Surface when 0.8m/s; 9 is the temperature variation relation curve of the velocity of flow of steel wire exchange current value and Steel Wire Surface when 1.2m/s; 10 is the temperature variation relation curve of the velocity of flow of steel wire exchange current value and Steel Wire Surface when 2.2m/s.
Embodiment
Directly being opposite to needs in the plating tank to be applied exchange current or voltage by galvanized wire rod two ends, and the joule heating that is produced by the resistance of wire rod own makes its surface temperature reach required working temperature.
Wherein, wire rod is at the uniform velocity by plating tank, and described exchange current or voltage constant also conduct to wire rod through conducting strip, and described conducting strip is and the two ends sliding contact of the processed paragraph of wire rod, and connect conducting strip and exchange current or voltage by copper cash, form a current circuit.The ac frequency that the wire rod two ends are applied is 10Hz~1M kHz.The waveform of exchange current is a kind of in sine wave, choppy sea, square wave or the pulse wave.
Definite method of alternating current or voltage application value is: wire surface temperature value size is as required determined alternating current or voltage application value: the temperature coefficient of resistance of measuring the wire rod of different size earlier, make the relation of wire rod resistance and wire surface temperature variation respectively, apply an exchange current then at the wire rod two ends, adjusting is applied to the exchange current at wire rod two ends, accurately measure by the exchange current of wire rod and the alternating voltage at wire rod two ends and change, thereby make the variation tendency of the wire rod resistance of different size with the size of the exchange current that passes through wire rod, take resistance as the relation curve of intermediate parameters match, can determine alternating current or voltage application value under the required wire surface temperature according to curve by exchange current size with the wire surface temperature variation of the wire rod of different size.
Definite method of wire rod alternating current or voltage application value is under the different in flow rate: according to the frequency by making wire rod exchange current of the wire rod by different size under the current system of different in flow rate and the graph of relation of voltage swing and wire surface temperature variation, can determine alternating current under the required wire surface temperature or voltage application value under the different in flow rate according to curve.
Patent of the present invention is not only applicable to the surface and is the plating of the wire rod of metal or the heating process in the pre-treatment, also is applicable to plating and the thermal treatment process of surface for the part of metal.
Embodiment
Electroplate or pre-treatment heat-processed is example with the diameter Mild Steel Wire that is 0.8mm, the velocity of flow of wire rod in the plating pond is 0.8m/s, and the length of solution is respectively 3m, 0.35m, 0.2m in the plating pond, can calculate then that liquor capacity is 0.21m in the plating pond 3
If according to the whole solution process of traditional heating, the surface temperature of this wire rod be risen to 60 ℃ from 20 ℃, need provide 3.5 * 10 to whole solution 7The heat of joule concerning the common electrical well heater that a power is 29KW, needed 20 minutes whole solution could be risen to 60 ℃ by 20 ℃, and not only power consumption but also consuming time is simultaneously because the too high meeting of whole solution temperature produces the obnoxious flavour contaminate environment.
Utilize this heating process, as shown in Figure 1, in wire material electroplating or pre-treatment heat-processed, overlap with two conductive copper sheets 2 at two ends, connect copper sheet 2 and an alternating voltage 3 by thicker copper wire 5 again through the wire rod 1 required heating of flow (wire rod flow direction 7) of coating bath or pretreatment tank 6.In this example, the Steel Wire Surface temperature need rise to 60 ℃ from 20 ℃, the steel wire flow velocity is 0.8m/s, wire gauge is diameter 0.8mm, according to the diameter of measuring be the Mild Steel Wire of 0.8mm under different in flow rate by the exchange current value of steel wire and the temperature variation graph of relation of Steel Wire Surface, as shown in Figure 2, applying a size at the two ends of steel wire process coating bath or pretreatment tank is 23A, frequency is 50Hz, power is the exchange current of 2.7KW, the surface temperature of wire rod will in seconds rise to 60 ℃ by 20 ℃ rapidly. and this power required with traditional whole heating method (29KW) is compared, but saves energy is more than 10 times.
By relatively being not difficult to find out of two kinds of technologies: present method is not only energy-conservation but also can effectively avoid obnoxious flavour to overflow, and reduces and pollutes.Wire rod surface temperature rising simultaneously is fast especially, can effectively improve plating production efficiency.

Claims (5)

1. wire material electroplating or pretreating heating technology, it is characterized in that: directly processed wire rod two ends are applied exchange current, the joule heating that is produced by the resistance of wire rod own makes its surface temperature reach required working temperature; The ac frequency that the wire rod two ends are applied is 10Hz~1M kHz; The waveform of described exchange current is a kind of in sinusoidal wave, choppy sea or the square wave.
2. a kind of wire material electroplating according to claim 1 or pretreating heating technology, it is characterized in that: directly being opposite to needs in the plating tank to be applied exchange current by galvanized wire rod two ends, and the joule heating that is produced by the resistance of wire rod own makes its surface temperature reach required working temperature.
3. a kind of wire material electroplating according to claim 2 or pretreating heating technology, it is characterized in that: described wire rod at the uniform velocity passes through plating tank, described exchange current is constant and conduct to wire rod through conducting strip, and described conducting strip is and the two ends sliding contact of the processed paragraph of wire rod.
4. according to claim 1,2 or 3 described a kind of wire material electroplating or pretreating heating technologies, it is characterized in that: definite method of the value of applying of described alternating current is: wire surface temperature value size is as required determined the value of applying of alternating current: the temperature coefficient of resistance of measuring the wire rod of different size earlier, make the relation of wire rod resistance and wire surface temperature variation respectively, apply an exchange current then at the wire rod two ends, adjusting is applied to the exchange current at wire rod two ends, accurately measure by the exchange current of wire rod and the alternating voltage at wire rod two ends and change, thereby make the variation tendency of the wire rod resistance of different size with the size of the exchange current that passes through wire rod, take resistance as the relation curve of intermediate parameters match, can determine the value of applying of the alternating current under the required wire surface temperature according to curve by exchange current size with the wire surface temperature variation of the wire rod of different size.
5. a kind of wire material electroplating according to claim 4 or pretreating heating technology, it is characterized in that: the definite method of the value of applying of described alternating current under different in flow rate is: according to the frequency by making wire rod exchange current of the wire rod by different size under the current system of different in flow rate and the graph of relation of voltage swing and wire surface temperature variation, can determine the value of applying of the alternating current under the required wire surface temperature under the different in flow rate according to curve.
CN2007100084257A 2007-01-11 2007-01-11 Wire material electroplating or pretreating heating technology Expired - Fee Related CN101024890B (en)

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CN2007100084257A CN101024890B (en) 2007-01-11 2007-01-11 Wire material electroplating or pretreating heating technology

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Application Number Priority Date Filing Date Title
CN2007100084257A CN101024890B (en) 2007-01-11 2007-01-11 Wire material electroplating or pretreating heating technology

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CN101024890B true CN101024890B (en) 2010-09-01

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* Cited by examiner, † Cited by third party
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CN114703505B (en) * 2022-04-04 2023-11-28 昆明理工大学 Preparation method of metal atom electrocatalyst with stable carbon atom coordination

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN86100909A (en) * 1985-01-22 1986-10-08 泰克诺尔股份有限公司 The section bar of the processing of method, the equipment of implementing this method and the gained of processing conductive profile
EP0401889A1 (en) * 1989-06-05 1990-12-12 Hoogovens Groep B.V. Method for the manufacture of a metal-coated steel strip
CN2360425Y (en) * 1999-01-08 2000-01-26 郭长兴 Electroplating liquid temp. regulating device
CN2673023Y (en) * 2003-12-30 2005-01-19 詹虹 Quick heater with timer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN86100909A (en) * 1985-01-22 1986-10-08 泰克诺尔股份有限公司 The section bar of the processing of method, the equipment of implementing this method and the gained of processing conductive profile
EP0401889A1 (en) * 1989-06-05 1990-12-12 Hoogovens Groep B.V. Method for the manufacture of a metal-coated steel strip
CN2360425Y (en) * 1999-01-08 2000-01-26 郭长兴 Electroplating liquid temp. regulating device
CN2673023Y (en) * 2003-12-30 2005-01-19 詹虹 Quick heater with timer

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