CN103436933A - Composite softening and melting method and device for electrotinning production line - Google Patents
Composite softening and melting method and device for electrotinning production line Download PDFInfo
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- CN103436933A CN103436933A CN2013103622897A CN201310362289A CN103436933A CN 103436933 A CN103436933 A CN 103436933A CN 2013103622897 A CN2013103622897 A CN 2013103622897A CN 201310362289 A CN201310362289 A CN 201310362289A CN 103436933 A CN103436933 A CN 103436933A
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Abstract
The invention relates to plating to metal materials, in particular to a composite softening and melting method and device for a strip steel continuous electrotinning production line. The composite softening and melting method for the strip steel continuous electrotinning production line adopts a way of combing a resistance heating power supply (1) and an induction heater (2) to carrying out composite softening and melting on a tinned steel strip (3), the resistance heating power supply (1) adopts the frequency conversion technology and is composed of a high-voltage frequency converter and a single-phase regulating transformer, the resistance heating power supply are in electrical connection with an inlet conducting roller (4) and an outlet conducting roller (5) of a softening and melting section, and the inlet conducting roller and the outlet conducting roller are coated with the tinned strip steel so as to form a current loop; the resistance heating power supply is used for heating the tinned strip steel between the inlet conducting roller and the outlet conducting roller; the induction heater adopting a super-audio power supply for supplying power is used for induction heating on the tinned strip steel. According to the invention, the heating efficiency and the applicability of heating of an induction softening and melting process can be improved, and the stability of an alloy layer in a softening and melting procedure can be improved.
Description
Technical field
The present invention relates to the plating to metallic substance, particularly a kind of band steel continuous electroplating tin production line soft heat method and apparatus.
Background technology
In band steel continuous electroplating tin production line, soft heat is one of very important operation, and quality product is played to conclusive effect.It is by being heated on the melting temperature (232.15 ℃) of tin with steel after eleetrotinplate, make the tin layer fusing of belt steel surface and levelling under surface tension effects, form fine and close glossy surface, iron atom in steel matrix spreads in liquid tin simultaneously, forms the treatment process of tin iron alloy layer between steel matrix and surperficial tin layer.The tin trip of processing through the soft heat operation not only has good outward appearance, and due to the tin iron alloy layer that its surperficial tin layer is fine and close and form, corrosion resisting property significantly improves.
The principal element that affects tin iron alloy layer thickness comprises: temperature and heat-up time before the tin trip hardening.The growing amount of tin iron alloy layer with hardening before rising and heat-up time of tin trip temperature increase.
The heating means of tin trip mainly contain four kinds at present: 1, industrial frequency electric resistance heating method; 2, frequency modulation electrical resistance heating; 3, induction heating method; 4, the method that the industrial frequency electric resistance heating is combined with high-frequency induction heating.
The industrial frequency electric resistance heating method has advantages of that heating efficiency is high, and shortcoming is: 1, rate of heating is slow, and production line lifting speed process interalloy layer thickness is unstable; 2, after soft heat, the surface brightness of product is lower with respect to induction heating; 3, produce 2.8g/m
2while reaching following zinc-plated volume production product, surface easily produces the wood grain defect; 4, under the operating mode of high resistance soft heat power, because on load voltage and electric current between the conductive rollers of two of front and back of soft heat are simultaneously larger, very easily in conductive rollers and the angle generation electric discharge with steel, cause the electric arc spot, affect product surface quality; 5, cause three-phase imbalance, the upper strata electrical network is produced to harmonic pollution serious.
Frequency modulation electrical resistance heating (as the patent No.: CN102031544A, CN202005001U, CN201210387193) is a kind of modification method of industrial frequency electric resistance heating method, solved the three-phase imbalance problem, and the power factor of frequency transformer is high, little to the harmonic pollution of upper strata electrical network.On controlling, the wood grain defect substantially can guarantee zinc-plated amount 2.2g/m
2the wood grain defect does not appear in above product, but low zinc-plated amount (1.1g/m
2and following) the wood grain defect of product can not effectively solve.Simultaneously, other shortcoming of industrial frequency electric resistance heating still exists in the frequency modulation resistive heating.
Induction heating method relative resistance heating method rate of heating is fast, can be in the interior heating temperature rise amplitude that significantly improves of shorter heating distance, and the surface brightness of product is higher, and shortcoming is: 1, power loss is large, and heating efficiency is very low; 2,, thickness of slab wide to plate and the change in location sensitivity that produces with the steel shake, suitability is poor; 3, counter investment and loss are also larger.
Industrial frequency electric resistance heating and high-frequency induction heating combined techniques are (as the patent No.: CN201261813Y) combine to a certain extent the advantage of industrial frequency electric resistance heating and high-frequency induction heating, made up both shortcomings.Be mainly reflected in and solved the wood grain defect problem, and reduced to a certain extent the power demand of resistive heating.But the threephase load for industrial frequency electric resistance heating is uneven, to the harmonic pollution of upper strata electrical network, and high-frequency induction heating efficiency problem low, poor for applicability is without any improvement.
The present invention is based on the deficiency of current industrial frequency electric resistance heating and high-frequency induction heating combined techniques, invent out a kind of compound soft heat method of new eleetrotinplate production line.
Summary of the invention
Main purpose of the present invention provides a kind of more stable, energy-conservation compound soft heat method of eleetrotinplate, particularly improves heating efficiency and the suitability of induction reflow heating, improves the stable of soft heat operation alloy layer.
The objective of the invention is to be achieved through the following technical solutions:
A kind of compound soft heat method of eleetrotinplate production line is to adopt resistive heating power supply 1 and the mode of induction heater 2 combinations to carry out compound soft heat to zinc-plated steel band 3;
Described resistive heating power supply 1 adopts converter technique, by high voltage converter and single-phase voltage regulating transformer, formed, between the entrance conductive rollers 4 of resistive heating power supply 1 and soft heat section, outlet conductive rollers 5, there is conduction to be connected, tin trip 3 is coated on entrance conductive rollers 4 and outlet conductive rollers 5, thereby the formation current circuit, the tin trip 3 between 1 pair of entrance conductive rollers 4 of resistive heating power supply and outlet conductive rollers 5 carries out resistive heating;
The induction heater 2 that at least one adopts the ultrasonic frequency Power supply, carry out induction heating to tin trip 3.
The operating frequency of resistive heating power supply 1 medium-high voltage frequency converter is regulated according to the thickness of tin plate tin coating.
The operating frequency of the induction heater 2 ultrasonic frequency power supply that adopts is 20～50kHz, and wiring is soft state multiple twin water-cooled cable.
There are a plurality of induction heater 2 monomer distribution to carry out zone heating at tin trip 3 length directions.
The height of induction heater 2 is adjusted in real time according to the instruction of PLC.
The height of the total power that soft heat is required and soft heat line calculates according to the substrate width of target alloy layer thickness, tin trip 6 and the linear velocity with steel length, production-line technique section with between steel length, conductive rollers 5 and hardening groove 6 liquid levels between thickness, conductive rollers 4 and hardening groove 6 liquid levels, and calculates and export the soft heat control PLC to according to changing in real time.
The power of resistance heater 1 and induction heater 2, according to default power partition coefficient and efficiency factor data sheet, carries out real-time closed-loop control by PLC, and resistor power and induced power partition ratio are 3:1～10:3.
Another object of the present invention is to provide the compound soft heat device of a kind of eleetrotinplate production line, is achieved through the following technical solutions:
The compound soft heat device of a kind of eleetrotinplate production line, be to adopt resistive heating power supply 1 and the mode of induction heater 2 combinations to carry out compound soft heat to zinc-plated steel band 3, and it comprises: entrance conductive rollers 4, outlet conductive rollers 5, tin trip 3, hardening groove 6;
Described resistive heating power supply 1 adopts converter technique, by high voltage converter and single-phase voltage regulating transformer, formed, between the entrance conductive rollers 4 of resistive heating power supply 1 and soft heat section, outlet conductive rollers 5, there is conduction to be connected, tin trip 3 is coated on entrance conductive rollers 4 and outlet conductive rollers 5, thereby the formation current circuit, the tin trip 3 between 1 pair of entrance conductive rollers 4 of resistive heating power supply and outlet conductive rollers 5 carries out resistive heating;
The induction heater 2 that at least one adopts the ultrasonic frequency Power supply, carry out induction heating to tin trip 3.
Described conduction is connected to by copper bar and connects.
The operating frequency of induction heater (2) is 20～50kHz, by the wiring of soft state multiple twin water-cooled cable.
The height of induction heater (2) is adjusted in real time according to the instruction of PLC.
The present invention has obtained the compound soft heat method and apparatus of band steel continuous electroplating tin production line that a kind of frequency modulation resistance reflow combines with the ultrasonic frequency induction reflow, and compared with prior art, beneficial effect of the present invention is:
1, resistive heating adopts converter technique, has avoided the three-phase imbalance problem of industrial frequency electric resistance heating, has reduced the harmonic pollution to the upper strata electrical network, and has improved power factor;
2, utilize the ultrasonic frequency induction heating to substitute high-frequency induction heating, greatly improved suitability and the heating efficiency of induction heating, more energy-conservation;
3, this compound soft heat method, for the stable better effects if of controlling of the alloy layer in production line lifting speed operational process.
The accompanying drawing explanation
The structural representation that Fig. 1 is the compound soft heat device of eleetrotinplate production line of the present invention.
Reference numeral
Resistive heating power supply 1 induction heater 2
Tin trip 3 entrance conductive rollers 4
Outlet conductive rollers 5 hardening grooves 6
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further.The present invention is not limited to following examples.
Referring to Fig. 1, resistive heating power supply 1 adopts converter technique, high voltage converter and single-phase voltage regulating transformer, consists of.Resistive heating power supply 1 is connected by copper bar with entrance conductive rollers 4, the outlet conductive rollers 5 of soft heat section, tin trip 3 is coated on entrance conductive rollers 4 and outlet conductive rollers 5, thereby the formation current circuit, carry out direct heating to the tin trip 3 between entrance conductive rollers 4 and outlet conductive rollers 5.The operating frequency of resistive heating power supply 1 medium-high voltage frequency converter is regulated according to the thickness of tin plate tin coating.
The height of the total power that soft heat is required and soft heat line calculates according to the substrate width of target alloy layer thickness, tin trip 3 and the linear velocity with steel length, production-line technique section with between steel length, outlet conductive rollers 5 and hardening groove 6 liquid levels between thickness, entrance conductive rollers 4 and hardening groove 6 liquid levels, and calculates and export the soft heat control PLC to according to changing in real time.
The power of resistance heater 1 and induction heater 2, according to default power partition coefficient and efficiency factor data sheet, carries out real-time closed-loop control by PLC.
Principle of work of the present invention is:
1, the frequency modulation resistive heating adopts High-voltage Frequency Conversion Technology, and it,, aspect solution three-phase imbalance, harmonic pollution, raising power factor, belonging to the prior art category, is not done and repeat.In actual use procedure, the thicker product for thickness, need to reduce the output frequency of frequency transformer, to reduce the thermograde of the thickness direction (from outside to inside) caused due to skin depth, improves permeability and the homogeneity of heating; For thinner product, under the prerequisite that does not affect heating uniformity, suitably improve the output frequency of frequency transformer, can better bring into play the performance of frequency transformer, improve power factor.
2, induction heating adopts ultrasonic frequency rather than high frequency, because the electromagnetic wavelength of ultrasonic frequency is longer, therefore antidamping, with the mutual inductance penetrativity on higher than frequency electromagnetic waves, therefore than the applicable ability of high-frequency induction heating is stronger, stability is higher, and heating efficiency is much higher than high-frequency induction heating, power regulating range is larger.Equally, the speed of ultrasonic frequency induction heating is very fast, far away higher than industrial frequency electric resistance heating or frequency modulation resistive heating.
Embodiment 1:
Operation and setup parameter: tin trip width 980mm, thickness 0.20mm, zinc-plated amount are 0.9g/m
2, the resistance reflow frequency is 120Hz, induction reflow frequency 20KHz, the resistive heating power factor is set as 78%, the induction heating power factor is set as 70%, resistor power and induced power partition ratio are 3:1.
Working method: line speed is promoted to 380m/min by 300m/min
Result: belt steel surface is without wood grain, and raising speed section alloy layer 3 points (back side, central authorities, fore side) detect mean thickness and are respectively 0.35g/m
2, 0.34g/m
2, 0.37g/m
2, at the uniform velocity the equal thickness of section alloy layer three spot check lining is respectively 0.37g/m
2, 0.35g/m
2, 0.38g/m
2.
Embodiment 2:
Operation and setup parameter: tin trip width 980mm, thickness 0.20mm, zinc-plated amount are 0.9g/m
2, the resistance reflow frequency is 120Hz, induction reflow frequency 20KHz, the resistive heating power factor is set as 78%, the induction heating power factor is set as 70%, resistor power and induced power partition ratio are 3:1.
Working method: line speed by the 380m/min reduction of speed to 300m/min
Result: belt steel surface is without wood grain, and at the uniform velocity section alloy layer 3 points (back side, central authorities, fore side) detect mean thickness and are respectively 0.37g/m
2, 0.35g/m
2, 0.38g/m
2, the equal thickness of reduction of speed section alloy layer three spot check lining is respectively 0.38g/m
2, 0.36g/m
2, 0.4g/m
2.
Embodiment 3:
Operation and setup parameter: tin trip width 980mm, thickness 0.38mm, zinc-plated amount are 5.6g/m
2, the resistance reflow frequency is 60Hz, induction reflow frequency 20KHz, the resistive heating power factor is set as 75%, the induction heating power factor is set as 72%, resistor power and induced power partition ratio are 10:3.
Working method: line speed is promoted to 350m/min by 250m/min
Result: belt steel surface is without wood grain, and raising speed section alloy layer 3 points (back side, central authorities, fore side) detect mean thickness and are respectively 0.7g/m
2, 0.68g/m
2, 0.7g/m
2, at the uniform velocity the equal thickness of section alloy layer three spot check lining is respectively 0.72g/m
2, 0.7g/m
2, 0.73g/m
2.
Embodiment 4:
Operation and setup parameter: tin trip width 980mm, thickness 0.38mm, zinc-plated amount are 5.6g/m
2, the resistance reflow frequency is 60Hz, induction reflow frequency 20KHz, the resistive heating power factor is set as 75%, the induction heating power factor is set as 72%, resistor power and induced power partition ratio are 10:3.
Working method: line speed by the 350m/min reduction of speed to 250m/min
Result: belt steel surface is without wood grain, and at the uniform velocity section alloy layer 3 points (back side, central authorities, fore side) detect mean thickness and are respectively 0.72g/m
2, 0.72g/m
2, 0.73g/m
2, the equal thickness of reduction of speed section alloy layer three spot check lining is respectively 0.73g/m
2, 0.71g/m
2, 0.74g/m
2.
Claims (12)
1. the compound soft heat method of eleetrotinplate production line, be to adopt resistive heating power supply (1) and the mode of induction heater (2) combination to carry out compound soft heat to zinc-plated steel band (3), it is characterized in that:
Described resistive heating power supply (1) adopts converter technique, by high voltage converter and single-phase voltage regulating transformer, formed, between the entrance conductive rollers (4) of resistive heating power supply (1) and soft heat section, outlet conductive rollers (5), there is conduction to be connected, tin trip (3) is coated on entrance conductive rollers (4) and outlet conductive rollers (5), thereby the formation current circuit, resistive heating power supply (1) carries out resistive heating to the tin trip (3) between entrance conductive rollers (4) and outlet conductive rollers (5);
The induction heater (2) that at least one adopts the ultrasonic frequency Power supply, carry out induction heating to tin trip (3).
2. the compound soft heat method of eleetrotinplate production line according to claim 1, it is characterized in that: the operating frequency of resistive heating power supply (1) medium-high voltage frequency converter is regulated according to the thickness of tin plate tin coating.
3. the compound soft heat method of eleetrotinplate production line according to claim 1, it is characterized in that: the operating frequency of induction heater (2) the ultrasonic frequency power supply that adopts is 20～50kHz, wiring is soft state multiple twin water-cooled cable.
4. the compound soft heat method of eleetrotinplate production line according to claim 1, is characterized in that: have a plurality of induction heaters (2) monomer distribution to carry out zone heating at tin trip (3) length direction.
5. the compound soft heat method of eleetrotinplate production line according to claim 1, it is characterized in that: the height of induction heater (2) is adjusted in real time according to the instruction of PLC.
6. the compound soft heat method of eleetrotinplate production line according to claim 1, it is characterized in that: the height of the total power that soft heat is required and soft heat line calculates according to the substrate width of target alloy layer thickness, tin trip (6) and the linear velocity with steel length, production-line technique section between band steel length, conductive rollers (5) and hardening groove (6) liquid level between thickness, conductive rollers (4) and hardening groove (6) liquid level, and calculates and export the soft heat control PLC to according to changing in real time.
7. the compound soft heat method of eleetrotinplate production line according to claim 1, it is characterized in that: the power of resistance heater (1) and induction heater (2) is according to default power partition coefficient and efficiency factor data sheet, carry out real-time closed-loop control by PLC, resistor power and induced power partition ratio are 3:1～10:3.
8. the compound soft heat device of eleetrotinplate production line, to adopt resistive heating power supply (1) and the mode of induction heater (2) combination to carry out compound soft heat to zinc-plated steel band (3), it comprises: entrance conductive rollers (4), outlet conductive rollers (5), tin trip (3), hardening groove 6 is characterized in that:
Described resistive heating power supply (1) adopts converter technique, by high voltage converter and single-phase voltage regulating transformer, formed, between the entrance conductive rollers (4) of resistive heating power supply (1) and soft heat section, outlet conductive rollers (5), there is conduction to be connected, tin trip (3) is coated on entrance conductive rollers (4) and outlet conductive rollers (5), thereby the formation current circuit, resistive heating power supply (1) carries out resistive heating to the tin trip (3) between entrance conductive rollers (4) and outlet conductive rollers (5);
The induction heater (2) that at least one adopts the ultrasonic frequency Power supply, carry out induction heating to tin trip (3).
9. the compound soft heat device of eleetrotinplate production line according to claim 8 is characterized in that: induction heater (2) is realized movement and altitude location by reducing motor, worm gearing with displacement sensor.
10. the compound soft heat device of eleetrotinplate production line according to claim 8, it is characterized in that: described conduction is connected to by copper bar and connects.
11. the compound soft heat device of eleetrotinplate production line as claimed in claim 8 is characterized in that: the operating frequency of induction heater (2) is 20～50kHz, by the wiring of soft state multiple twin water-cooled cable.
12. the compound soft heat device of eleetrotinplate production line as claimed in claim 8 is characterized in that: the height of induction heater (2) is adjusted in real time according to the instruction of PLC.
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Cited By (3)
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| CN109440143A (en) * | 2018-12-26 | 2019-03-08 | 江苏科茂新材料科技有限公司 | Mirror surface ironworking technique |
| CN110318081A (en) * | 2019-08-05 | 2019-10-11 | 昆山培雷特成套机电设备有限公司 | A kind of electroplating assembly line processing unit (plant) |
| CN116828651A (en) * | 2023-05-23 | 2023-09-29 | 邯郸市金泰包装材料有限公司 | Reflow process based on electrotinning and reflow induction control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109440143A (en) * | 2018-12-26 | 2019-03-08 | 江苏科茂新材料科技有限公司 | Mirror surface ironworking technique |
| CN110318081A (en) * | 2019-08-05 | 2019-10-11 | 昆山培雷特成套机电设备有限公司 | A kind of electroplating assembly line processing unit (plant) |
| CN110318081B (en) * | 2019-08-05 | 2023-10-17 | 昆山培雷特成套机电设备有限公司 | Processing device for electroplating production line |
| CN116828651A (en) * | 2023-05-23 | 2023-09-29 | 邯郸市金泰包装材料有限公司 | Reflow process based on electrotinning and reflow induction control method thereof |
| CN116828651B (en) * | 2023-05-23 | 2024-03-26 | 邯郸市金泰包装材料有限公司 | Reflow process based on electrotinning and reflow induction control method thereof |
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Application publication date: 20131211 |