CN101880849A - Processing method for hot-dip galvanized sheet used by automobile - Google Patents
Processing method for hot-dip galvanized sheet used by automobile Download PDFInfo
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- CN101880849A CN101880849A CN 201010196503 CN201010196503A CN101880849A CN 101880849 A CN101880849 A CN 101880849A CN 201010196503 CN201010196503 CN 201010196503 CN 201010196503 A CN201010196503 A CN 201010196503A CN 101880849 A CN101880849 A CN 101880849A
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- dip galvanized
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Abstract
The invention discloses a processing method for a hot-dip galvanized sheet used for an automobile, belonging to the technical filed of steel belt continuous hot-dip galvanization. The method comprises the following steps: a pair of first air knives respectively provided with a first air blowing port is arranged in a furnace nose which is used for ensuring steel belts under a close condition to enter a zinc port containing zinc solution and arranged at a position corresponding to the part above the surface of the zinc solution; the steel belts are led from the furnace nose, then pass the part between the pair of the first air knives, and enter into the zinc port under the state that the first air blowing ports of the pair of the first knives blow the surface of the zinc solution; steel belts are led out of the zinc port because of the redirection of a sink roll in the zinc rot so as to ensure the steel belts which are led out form the zinc pot and adhered with zinc solution on the surface to pass the part between a pair of second air knives, wherein the pair of second air knives correspond to one side of the top of the zinc pot and are respectively provided with a second air blowing port; and as the second air blowing ports of the pair of second air knives sweep residual zinc solution adhered on the surfaces at two sides of the steel belts in a blowing manner, the hot-dip galvanized sheet used by vehicles is obtained through winding. The invention has the advantage of avoiding the defect of skip plating generated from surface slag adhering and ash adhering of the hot-dip galvanized sheet, thus ensuring the surface quality of the hot-dip galvanized sheet.
Description
Technical field
The invention belongs to steel band continuous hot galvanizing technical field, be specifically related to a kind of working method of hot-dip galvanized sheet used by automobile.
Background technology
Along with the progress in epoch and improving constantly of human life quality, the automotive industry fast development that adapts therewith, thus make hot-dip galvanizing sheet steel extensive day by day as the application of panel on vehicle, and require harsh day by day to the surface quality of heat zinc coating plate.Yet, the present vehicle that working method processed still is not enough to reach and day all tight surface quality requirements with heat zinc coating plate, the surface spots that concrete manifestation goes out is: different, not of uniform size and irregular substantially governed surperficial dry slag and sticking grey plating leakage defective occur on the surface of plate body, and this defective has become a great problem of restriction vehicle with the heat zinc coating plate quality-improving.
This reason as is known in the industry, steel band galvanizing operation (also claiming steel band continuous hot-dipping galvanizing operation) is the master operation of producing hot dip galvanizing plate, in this operation, annealed and the reduction after, steel band is the galvanized impurity of influence such as surface of steel plate oxide-free and greasy dirt, temperature also meets galvanized requirement, under sealed state, steel band enters zinc pot zinc-plated (" stove nose " also can claim " snoot ") in the stove nose of annealing furnace tail end, turn to (changed course) to leave the zinc pot by the sinking roller that is located in the zinc pot behind the immersion plating zinc, promptly, go out zinc liquid, remove the unnecessary zinc liquid that attaches in steel strip surface through the effect of scraping of blowing of air knife, thereby stay the uniform zinc layer of one deck thickness, after cooling, become Galvanized Steel Strip in steel strip surface.
As shown in the above description, the dry slag on galvanized sheet surface and sticking grey plating leakage obviously form in this operation.Theory and practice shows that the dry slag of steel strip surface and sticking grey plating leakage are in aforesaid stove nose, just produce when promptly steel band contacts with zinc liquid at the beginning.Because, zinc liquid surface in the stove nose produces scum silica frost, floating ash or scum silica frost unavoidably and adds impurity such as floating ash owing to a variety of causes, these impurity very easily adhere to steel strip surface when steel band enters zinc liquid, for some time and distance even steel band can move in zinc liquid, but can't therefore come off, often leave zinc liquid with steel band, thereby on steel band, stay the defective of dry slag and sticking grey plating leakage, have a strong impact on the surface quality of heat zinc coating plate, this heat zinc coating plate certainly will influence the quality of vehicle after using on the vehicle.
In order to address the above problem, insider both domestic and external has done a series of research and test, many patented technologies have also been formed, typical patented technology such as Japanese JP2005264224, Chinese patent CN1271234C and CN201217680A, but all there is the problem of attending to one thing and lose sight of another in these patent schemes.So-called Gu this, that is exactly the zinc liquid that adopts in the zinc pump suction stove nose, has certain effect to alleviating dry slag and sticking ash, so-called mistake that, that is exactly because zinc liquid has serious corrosive nature to the zinc pump, need keep in repair or change the zinc pump continually, thereby not only influence the production efficiency of heat zinc coating plate, and can increase cost and expense unreasonably.
In view of the existing shortcoming of above-mentioned prior art, be necessary more in depth to be explored, for this reason, the applicant has carried out the examination of repaying repeatedly, finds a way to resolve the problem, and technical scheme described below produces under this background.
Summary of the invention
Task of the present invention is to provide a kind of galvanized sheet of can eliminating the situation of surperficial dry slag and sticking grey plating leakage to occur and use guarantee any surface finish inclusion-free and indefectible when galvanizing, satisfies the working method of automobile with the hot-dip galvanized sheet used by automobile of the harsh requirement of plate.
Task of the present invention is finished like this, a kind of working method of hot-dip galvanized sheet used by automobile, it is to be used for ensureing that steel band is in the stove nose that enters the zinc pot that fills zinc liquid under the closed state, and the position is provided with a pair of first air knife that respectively has first puff port that zinc liquid liquid level is brushed above corresponding to zinc liquid liquid level, described steel band is introduced continuously and continuously by way of entering in the described zinc pot between described a pair of first air knife and under the state that first puff port of a pair of first air knife brushes described zinc liquid liquid level from described stove nose, then, steel band is drawn the zinc pot by the changed course that is arranged at the sinking roller in the zinc pot, and make the surface adhesion of drawing the zinc pot have the steel band of zinc liquid to pass through from being arranged between a pair of second air knife that respectively has second puff port corresponding to zinc pot top one side, second puff port by a pair of second air knife is cleared away the unnecessary zinc liquid that sticks to the steel band both side surface in the purging mode, obtains the vehicle heat zinc coating plate through rolling.
In a specific embodiment of the present invention, be formed with one first angle between described first puff port and the described steel band.
In another specific embodiment of the present invention, the number of degrees of described first angle are 10-60 °.
In another specific embodiment of the present invention, be formed with second angle between described second puff port and the described steel band.
In another specific embodiment of the present invention, the number of degrees of described second angle are 10-60 °.
Also have in the specific embodiment of the present invention; have the reducing atmosphere to steel belt protection in the described stove nose, the gas that described first puff port brushes described zinc liquid liquid level is the reducing atmosphere to described steel belt protection that comes from the described stove nose.
More of the present invention and in specific embodiment, described reducing atmosphere to steel belt protection is hydrogen or nitrogen.
In of the present invention and then specific embodiment, described a pair of first air knife is furnished with a pressurizing device, this pressurizing device comprises first blower fan, inlet pipe and escape pipe, first blower fan is configured on the terrace or is configured on the fan supporter that is arranged on the terrace, one end of inlet pipe connects with described stove nose and communicates with the nasal cavity of stove nose, the inlet mouth of the other end and first blower fan connects, the other end of escape pipe is connected with described a pair of first air knife, and the air outlet of the other end and first blower fan connects.
Of the present invention again more and in specific embodiment, described a pair of second air knife is furnished with a supercharging device, this supercharging device comprises second blower fan and connects pipeline, second blower fan is installed on the terrace or is installed on the blower fan resting support that is arranged on the terrace, an end that connects pipeline is connected with the air outlet of second blower fan, and the other end is connected with described a pair of second air knife.
Technical scheme provided by the invention is because in the stove nose and corresponding to being provided with a pair of first air knife above the zinc liquid liquid level in the zinc pot, by a pair of first air knife zinc liquid liquid level is brushed, make the impurity that floats on the zinc liquid liquid level blow to position away from steel band, the regional liquid level that makes steel band enter zinc liquid does not have any impurity, therefore lime-ash can not adhere to the surface of steel band, avoid the defective of hot dip galvanizing plate surface because of dry slag or sticking grey plating leakage, ensured the surface quality of hot dip galvanizing plate, can satisfy the harsh requirement of vehicle with hot dip galvanizing plate.
Description of drawings
Fig. 1 is the synoptic diagram of the used galvanizing rig of the inventive method.
Embodiment
For the auditor that the makes Patent Office especially public can be expressly understood technical spirit of the present invention and beneficial effect more, the applicant general elaborates in conjunction with the accompanying drawings in the mode of embodiment below, but to the description of embodiment all is not restriction to the present invention program, any according to the present invention's design done only for pro forma but not substantial equivalent transformation all should be considered as technical scheme category of the present invention.
Embodiment:
Please in conjunction with Fig. 1, at first, ensureing that steel band 1 is in the stove nose 2 that enters under the closed state in the zinc pot 3 that fills zinc liquid 31 and at a pair of first air knife 6 that respectively has first puff port 61 that is provided for corresponding to the position above the zinc liquid liquid level zinc liquid liquid level is brushed, the length of a pair of first air knife 6 should satisfy 〉=width of steel band 1, and first puff port 61 of first air knife 6 is aimed at zinc liquid liquid level with heeling condition, more particularly, maintain the first angle α between first puff port 61 and the steel band 1, the number of degrees of the first angle α are preferably 10-60 °, be 15-55 ° preferably, be 30-45 ° better, be preferably 45 °, present embodiment is selected 45 °.So, when a pair of first puff port 61 brushes zinc liquid liquid level simultaneously, the impurity on zinc liquid liquid level surface is blown off away from the position of steel band 1, because steel band 1 is when entering zinc pot 3, from process between a pair of first air knife 6.A pair of first air knife 6 is furnished with a pressurizing device 7, this pressurizing device 7 comprises first blower fan 71 and into and out of tracheae 72,73, in the present embodiment, first blower fan 71 is directly installed on the terrace, but first blower fan 71 can be installed on the fan supporter fully, take first blower fan 71 by fan supporter and be fixed on the terrace of field of employment.One end of inlet pipe 72 connects with stove nose 2 and communicates with the nasal cavity of stove nose 2, and the inlet mouth of the other end and first blower fan 71 connects, and an end of escape pipe 73 is connected with a pair of first air knife 6, and the air outlet of the other end and first blower fan 71 connects.Secondly, be provided with a pair of second air knife 5 at the position of drawing zinc pot 3 corresponding to steel band 1, the length of a pair of second air knife 5 should satisfy equally 〉=width of steel band 1, and second puff port 51 of second air knife 5 aims at steel band 1 with heeling condition, more particularly, be formed with one second angle β between second puff port 51 and the steel band 1, the number of degrees of the second angle β are preferably 10-60 °, are 15-55 ° preferably, are 30-45 ° better, be preferably 45 °, present embodiment is selected 45 °.So, when a pair of second puff port 51 purges the both sides of steel band 1 respectively, can make the unnecessary zinc liquid cleaning that sticks to steel band 1 both side surface, promptly, unnecessary zinc liquid drops down to zinc pot 3 along steel band 1, because steel band 1 is when going out zinc pot 3, between a pair of second air knife 5.A pair of second air knife 5 is furnished with a supercharging device 8, this supercharging device 8 comprises second blower fan 81 and connects pipeline 82, second blower fan 81 is located on the blower fan resting support 812, blower fan resting support 812 is taken second blower fan 81 and is installed on the terrace of field of employment, corresponding with aforesaid first blower fan 71, just, first blower fan 71 is positioned at a side of zinc pot 3, and second blower fan 81 is positioned at the opposite side of zinc pot 3.An end that connects pipeline 82 is connected with the air outlet 811 of second blower fan 82, and the other end is connected with a pair of second air knife 5.
Be filled with the reducing gas or the title reducing atmosphere that are used for steel belt protection in the aforesaid stove nose 2; reducing atmosphere is hydrogen or nitrogen; present embodiment is selected and is used nitrogen; the gas that first puff port 61 of aforesaid first air knife 6 blows out is the reducing atmosphere in the stove nose 2; also be hydrogen or nitrogen, present embodiment is selected and is used nitrogen.
The applicant specifically describes the working method of vehicle of the present invention with pot galvanize, through former process is under the sealed state of steel band 1 in being filled with the stove nose 2 of reducing gas after the annealed reduction and by way of entering continuously in the zinc pot 3 between a pair of first air knife 6 and under the state that 61 pairs of zinc liquid of first puff port liquid level of a pair of first air knife 6 brushes, then, steel band 1 in being arranged at zinc pot 3 the changed course that promptly is submerged in the sinking roller 4 in the zinc liquid 31 and draw zinc pot 3, and the steel band 1 that the surface that makes the both sides of drawing zinc pot 3 all is stained with zinc liquid passes through between aforesaid a pair of second air knife 5, the zinc liquid that will stick to steel band 1 surface redundantly in the mode that purges respectively by second puff port 51 of a pair of second air knife 5 purges to be removed, and obtains the vehicle heat zinc coating plate after rolling.In this process, mention in front as the applicant, can produce impurity 9 because of a variety of causes on surface corresponding to the zinc liquid 31 in the stove nose 2, on float on the surface of zinc liquid 31, therefore under the effect of brushing of a pair of first air knife 6, the impurity 9 that energy will float on the lime-ash on zinc liquid 31 surfaces and so on blows to the position away from steel band 1.Because first puff port 61 of first air knife 6 is cavitys that a length surpasses the width of steel band 1, that is to say that first puff port 61 stitches just as cutter, under the work of first blower fan 71, by inlet pipe 72 gas in the stove nose 2 is supplied with first air outlet 61 through escape pipe 73, form the first puff port 61 ejection air curtains of the gas of certain pressure from cutter seam shape, this air curtain is under the blocking reflected of steel band 1, can blow to the surface of zinc liquid 31, zinc liquid 31 lip-deep impurity be blown to the position (specifically seeing Fig. 1) that is enough to leave steel band.Guarantee that it is the surface cleaning of the ingress of steel band 1 that steel band 1 enters zinc pot 3 places, thereby guaranteed the surface quality of steel band 1.Aforesaid pressurizing device 7 can ensure the circulation of atmosphere.
In sum, the inventive method can be stopped steel band 1 substantially can not adhere to impurity 9, satisfies the automobile steel band production requirement of high request, and workable, and input and running cost are all cheap, are simple and easy to do ultimate attainment technical schemes so can yet be regarded as.Especially the applicant uses this method that the surface of the steel band after zinc-plated 1 is observed, and does not all find sticking grey dry slag in surface and plating leakage phenomenon.
Claims (9)
1. the working method of a hot-dip galvanized sheet used by automobile, it is characterized in that it is to be used for ensureing that steel band (1) is in the stove nose (2) that enters the zinc pot (3) that fills zinc liquid under the closed state, and the position is provided with a pair of first air knife (6) that respectively has first puff port (61) that zinc liquid liquid level is brushed above corresponding to zinc liquid liquid level, described steel band (1) is introduced continuously and continuously by way of entering in the described zinc pot (3) between described a pair of first air knife (6) and under the state that first puff port (61) of a pair of first air knife (6) brushes described zinc liquid liquid level from described stove nose (2), then, steel band (1) is drawn zinc pot (3) by the changed course that is arranged at the sinking roller (4) in the zinc pot (3), and make the surface adhesion of drawing zinc pot (3) have the steel band (1) of zinc liquid to pass through from being arranged between a pair of second air knife (5) that respectively has second puff port (51) corresponding to zinc pot (3) top one side, second puff port (51) by a pair of second air knife (5) is cleared away the unnecessary zinc liquid that sticks to steel band (1) both side surface in the purging mode, obtains the vehicle heat zinc coating plate through rolling.
2. the working method of hot-dip galvanized sheet used by automobile according to claim 1 is characterized in that being formed with between described first puff port (61) and the described steel band (1) one first angle (α).
3. the working method of hot-dip galvanized sheet used by automobile according to claim 2, the number of degrees that it is characterized in that described first angle (α) are 10-60 °.
4. the working method of hot-dip galvanized sheet used by automobile according to claim 1 is characterized in that being formed with second angle (β) between described second puff port (51) and the described steel band (1).
5. the working method of hot-dip galvanized sheet used by automobile according to claim 4, the number of degrees that it is characterized in that described second angle (β) are 10-60 °.
6. the working method of hot-dip galvanized sheet used by automobile according to claim 1; it is characterized in that having in the described stove nose (2) reducing atmosphere to steel belt protection, the gas that described first puff port (61) brushes described zinc liquid liquid level is the reducing atmosphere to described steel belt protection that comes from the described stove nose (2).
7. the working method of hot-dip galvanized sheet used by automobile according to claim 6 is characterized in that described reducing atmosphere to steel belt protection is hydrogen or nitrogen.
8. the working method of hot-dip galvanized sheet used by automobile according to claim 1, it is characterized in that described a pair of first air knife (6) is furnished with a pressurizing device (7), this pressurizing device (7) comprises first blower fan (71), inlet pipe (72) and escape pipe (23), first blower fan (71) is configured on the terrace or is configured on the fan supporter that is arranged on the terrace, one end of inlet pipe (72) connects with described stove nose (2) and communicates with the nasal cavity of stove nose (2), the inlet mouth of the other end and first blower fan (71) connects, the other end of escape pipe (73) is connected with described a pair of first air knife (6), and the air outlet of the other end and first blower fan (71) connects.
9. the working method of hot-dip galvanized sheet used by automobile according to claim 1, it is characterized in that described a pair of second air knife (5) is furnished with a supercharging device (8), this supercharging device (8) comprises second blower fan (81) and connects pipeline (82), second blower fan (81) is installed on the terrace or is installed on the blower fan resting support (812) that is arranged on the terrace, an end that connects pipeline (82) is connected with the air outlet (811) of second blower fan (81), and the other end is connected with described a pair of second air knife (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201010196503 CN101880849A (en) | 2010-06-08 | 2010-06-08 | Processing method for hot-dip galvanized sheet used by automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010196503 CN101880849A (en) | 2010-06-08 | 2010-06-08 | Processing method for hot-dip galvanized sheet used by automobile |
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| CN101880849A true CN101880849A (en) | 2010-11-10 |
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| CN 201010196503 Pending CN101880849A (en) | 2010-06-08 | 2010-06-08 | Processing method for hot-dip galvanized sheet used by automobile |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015109868A1 (en) * | 2014-01-24 | 2015-07-30 | 厦门新钢金属制品有限公司 | Galvanising and epoxy-coating production line |
| CN108624832A (en) * | 2018-07-10 | 2018-10-09 | 河北首燕机械股份有限公司 | Inhibit and remove zinc gray device in hot galvanizing furnace nose |
| CN115261758A (en) * | 2022-08-17 | 2022-11-01 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Improve sediment device of arranging of hot-galvanize cladding material quality |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0211743A (en) * | 1988-06-29 | 1990-01-16 | Kawasaki Steel Corp | Device for preventing adhesion of ash in continuous molten metal plating |
| JPH07145465A (en) * | 1993-11-24 | 1995-06-06 | Nippon Steel Corp | Hot dip metal coating method and device |
-
2010
- 2010-06-08 CN CN 201010196503 patent/CN101880849A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0211743A (en) * | 1988-06-29 | 1990-01-16 | Kawasaki Steel Corp | Device for preventing adhesion of ash in continuous molten metal plating |
| JPH07145465A (en) * | 1993-11-24 | 1995-06-06 | Nippon Steel Corp | Hot dip metal coating method and device |
Non-Patent Citations (1)
| Title |
|---|
| 《宝钢技术》 20031231 马新建等 无沉没辊热浸镀技术 1-5 1-9 , 第3期 2 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015109868A1 (en) * | 2014-01-24 | 2015-07-30 | 厦门新钢金属制品有限公司 | Galvanising and epoxy-coating production line |
| CN108624832A (en) * | 2018-07-10 | 2018-10-09 | 河北首燕机械股份有限公司 | Inhibit and remove zinc gray device in hot galvanizing furnace nose |
| CN115261758A (en) * | 2022-08-17 | 2022-11-01 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Improve sediment device of arranging of hot-galvanize cladding material quality |
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Open date: 20101110 |