CN101239430A - Technique for manufacturing flux-cored wire from disk round steel wire bar - Google Patents
Technique for manufacturing flux-cored wire from disk round steel wire bar Download PDFInfo
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- CN101239430A CN101239430A CNA2007100567074A CN200710056707A CN101239430A CN 101239430 A CN101239430 A CN 101239430A CN A2007100567074 A CNA2007100567074 A CN A2007100567074A CN 200710056707 A CN200710056707 A CN 200710056707A CN 101239430 A CN101239430 A CN 101239430A
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Abstract
A technique for producing flux-cored wires by using disc round steel wire bars is characterized by comprising following steps: using disc round steel wire bars as raw materials; producing accurate steel bands used for flux-cored wires exclusively; producing semi-finished products which are flux-cored wire blank tubes by using accurate steel bands; producing termination products by drafting to reduce the diameter thereof with a high speed; packaging the termination products by winding with a high speed. The advantages of the invention are: the invented technique uses high-speed hot-rolling disc round steel wire bars to replace broad cold-rolled steel strip, so that the raw material cost is reduced greatly; the continuous overlong endless accurate steel bands are used to save assistant procedure time for welding steel band joints, reduce end breakage rate during rolling and drafting procedures, improve continuous operation rate, and further reduce production cost; the invented technique uses high-speed accurate cold tandem rolling machine group to solve the problem that the sheet iron rolling precision is difficult to be controlled when rolling flux-cored wires by using disc round steel wire bars directly, and the filling precision is improved greatly since size accuracy of the flux-cored wire exclusive use accurate steel bands is high.
Description
(1) technical field:
The present invention relates to a kind of production method of flux-cored wire, particularly a kind of technology that adopts dish round steel wire rod to make flux-cored wire.
(2) background technology:
The method of at present traditional manufacturing flux-cored wire almost all adopts the steel band method, and promptly adopting the wide cold-rolling roll bending is raw material, earlier it is cut to the steel band bar; Shallow bid steel band bar is spliced into deep bid overlength steel band with welding method, then through be rolled into U-lag, add powder, heal up, operation such as tube reducing, finally make
About the finished product flux-cored wire.The outstanding shortcoming of steel band method is: wide cold-rolling roll bending price is higher, therefore makes the flux-cored wire production cost high.Next is the wall scroll steel band limited length that the cold-rolled steel roll coil of strip is tailored, and generally is no more than 1, and therefore 000m must be welded into it overlength steel band treppenwicklung about myriametre in advance, could normally use for production line.So both increase the end breakage rate of production process, increased the technology cost again; And, make that every steel band composition is inconsistent, thereby have influence on the uniformity of flux-cored wire composition because there are certain difference in wide cut steel band middle part and marginal element.
As far back as United States Patent (USP) 3466.907 in 1969 process program that disc-method is produced flux-cored wire has just been proposed for this reason, after this clear 54-2815 of Japanese secret service, Chinese patent 93115833.8, Chinese patent 92208386.X, Chinese patent 02256497.7 propose some similar schemes again.But its common ground all be emphasize under complete cold rolling condition, will coil continuously circle fluting (or rolling into flat), roll into U-shaped, add powder, moulding, tube reducing be the finished product flux-cored wire.But above-mentioned patent all propose how reliably assurance rolling U-shaped base material sectional dimension, especially control the effective scheme of U-shaped base material thickness and spreading width size.In fact owing to the accuracy of manufacture of rolling equipment, the factors such as wearing and tearing of roll, do not have corresponding technological measure, under the rolling working condition of long-time continuous, can not accurately guarantee the thickness deviation of U-shaped base material.When above-mentioned patent became U-lag by dish round steel wire rod rolling, it was rolling all only to adopt horizontal roll to carry out vertical direction again, and there do not have corresponding edger roll group to carry out horizontal direction to be rolling, therefore also can't accurately control at the width spreading width.Because the filling rate of flux-cored wire is the ratio of unit length flux-cored wire traditional Chinese medicine powder and flux-cored wire gross weight, and the flux-cored wire gross weight equals appearance sheetmetal and medicinal powder weight sum, so U-shaped base material sectional dimension error will inevitably reduce the filling rate precision of flux-cored wire when big.Simple thickness direction is rolling, also makes the edge form breach easily, thereby causes welding wire improper fracture and accelerate the wearing and tearing of wire drawing die when follow-up stretching tube reducing.In addition, above-mentioned patent adopts cold rolling entirely, cold-drawing process, the excessive flow harden of metal.The excessive wearing and tearing that also strengthen its Butt welding gun mouth of finished product flux-cored wire hardness influence the Wire Performance of welding wire.
Most important also have: because of being rolled into U-shaped base material technology from wire rod rolled product and the follow-up powder, moulding, tube reducing operation of adding overlaps continuous equipment one and finish, and the linear velocity that adds powder place U-shaped base material should not be too high (general≤100m/min), otherwise cause medicinal powder to spill easily outward, so just limited the raising of complete equipment speed of production, therefore a whole set of production line production efficiency is lower, production cost also therefore improves, so be difficult to use in large-scale industrial production.
Above-mentioned just reason, proposing with dish round steel wire rod from first is that raw material adopts patent that full cold-rolling process makes flux-cored wire so far, does not see in industrial production and uses on a large scale.Therefore, provide a kind of brand-new a kind of new technology that adopts dish round steel wire rod to make flux-cored wire to be necessary, market prospects can be quite wide.
(3) summary of the invention:
The object of the present invention is to provide a kind of new technology that adopts dish round steel wire rod to make flux-cored wire, it can reduce the production cost of flux-cored wire, the product quality of raising flux-cored wire, realizes extensive, high efficiency production.
Technical scheme of the present invention: a kind of technology that adopts dish round steel wire rod to make flux-cored wire is characterized in that may further comprise the steps:
(1) employing dish round steel wire rod is a raw material;
(2) the special-purpose accurate steel band of preparation flux-cored wire:
Adopting high speed hot rolling dish round steel wire rod is raw material, behind mechanical descaling, rust cleaning or mechanical descaling+cathodic pickling rust cleaning, cold drawn sizing, on the high speed and precision tandem mills of special use, use the cold continuous rolling mode, be incorporated under the control of automatic measuring and controlling system by series of rollers pass groups such as plain-barreled roll, edger roll, plain-barreled roll, edger roll, format roll, crosshead rollers, be rolled into the special-purpose accurate steel band of flux-cored wire, heat-treat stand-by thereafter;
(3) adopt the accurate steel band of above-mentioned steps (2) to produce semi-finished product flux-cored wire base pipe: fill the type groove of medicinal powder, flux-cored wire semi-finished product base pipe is made in the moulding and suppress cold footpath of healing up behind the filling medicinal powder in the type groove, and this semi-finished product base pipe diameter is
(4) manufacture a finished product-the high speed drawing tube reducing:
Adopt 6～14 high-speed straight-line harmonizing type wire drawing machinees with flux-cored wire semi-finished product drawing tube reducing, make the flux-cored wire finished product;
(5) packed products-high-speed layer is around rolling:
On the high speed layer winder with the flux-cored wire layer on vinyl disc and carry out vacuum packaging.
The specification of the raw material high speed hot rolling dish round steel wire rod in the above-mentioned said step (2) is
In the material except that Fe each constituent content percentage be C≤0.08%, S, P≤0.035%, Mn≤0.60%, Si≤0.40%.
Can also contain one or two or more kinds of following column element in the material of above-mentioned said raw material high speed hot rolling dish round steel wire rod, Ni≤1% wherein, Cr≤0.5%, Re≤0.1%, Ti≤0.1%, B≤0.01%, Cu≤0.6%, Al≤0.2%, and O≤70ppm, N≤70ppm.Typical case's material is H08A, and the general value of chemical composition is: C=0.05～0.07%, S, P≤0.02%, Si=0.02～0.03%, Mn=0.3～0.5%, Cu≤0.02%, Al≤0.06%, O≤50ppm, N≤50ppm.
The special-purpose accurate steel band of flux-cored wire is the overlength non junction that is shaped with the wire rod rolling of dish round steel in the above-mentioned said step (2), said overlength non junction at least 1, in the 000m, general 20, non junction in the 000m, the accurate special steel strip of physical dimension, its thickness deviation≤± 0.02mm, representative value=± 0.005～0.01mm,, width tolerance≤± 0.1mm, representative value=± 0.03～0.05mm; Its width dimensions B=10～16mm, gauge δ=0.5～1.0mm; Its typical section is shaped as the general square-section of a., the odd-shaped cross section of b. band cork cot, the cross section of c. two ends band hypotenuse.Other size and cross sectional shape are not limited to above three kinds, and the shape at edge especially also can be for making the heal up form of tight other similar design of finished product welding wire.
High speed and precision cold continuous rolling mode in the above-mentioned said step (2) is made up of around take-up machine, lubricating and cooling system, online thickness, width monitoring and automatic control system paying out machine, multi-joint milling train, steel belt layer, it comprises and is no less than two horizontal roll unit and is no less than two vertical roller unit that rolling if desired accurate in size cross section then need increase the roll unit that a crosshead makes up at least again with the cross section that needs rolling band cork cot; Also should comprise the closed-loop control system that thickness, width dimensions on-line monitoring and horizontal roll, the automatic governor motion of vertical roller roll gap are formed.
The combination of roll pass in the above-mentioned said step (2) is six tandem mills, each breast roller pass and compound mode be a pair of diameter of first frame 〉=
Horizontal roll, a pair of diameter of the 3rd frame 〉=
Horizontal roll, the second, each a pair of vertical edger roll (or claiming edger roll) that has groove of four frames, the 5th frame two horizontal rolls is up and down formed closed type, the 6th frame four rollers is up and down formed closed type, but its roll pass and compound mode, and, also comprise to roll out other roll pass and the compound mode thereof of cross sectional shape as described in Figure 8 not only in this.
The long precise steel band that goes out with the wire rod rolling of dish round steel on the high speed and precision tandem mills of special use in the above-mentioned said step (2) generally will carry out bright annealing heat treatment under protective atmosphere, this protective atmosphere can be hydrogen (H
2) gas or N
2+ H
2Gas, annealing temperature≤650 ℃, temperature retention time is selected 0.5～12 hour according to raw materials size and finished size; Said heat treatment is to carry out bright annealing heat treatment, when the entry table steel wire rod≤
Or finished diameter 〉=
Without bright annealing heat treatment; It is said that to carry out bright annealing heat treatment be that online or concentrated batch carries out bright annealing heat treatment.
Use flux-cored wire special make-up machine in the above-mentioned said step (3), the outlet diameter of flux-cored wire base pipe 〉=
Can adopt the tandem rolling mode greater than 7 frames, that also can adopt the tandem rolling that is no less than 5 frames to add to be no less than the combination of 2 wire drawing jars rolls-pulls out mode.
Above-mentioned said finished product is the flux-cored wire finished product, and can there be overlap joint interface, the c. scarf joint interface of three kinds of form a.O shape mating interfaces, b. band cork cot in its cross section.Typical sizes is
No matter above-mentioned which kind of interface shape does not all have obviously interface slit of macroscopic view, under tool microscope or projecting apparatus, measure its interface space all≤0.02mm.
The multi-joint wire drawing machine that uses in the above-mentioned said step (4) should be straight line harmonizing type wire drawing machine or loop type linear drawing machine, and its wire drawing tank diameter exists
Between.
Step analysis of the present invention:
High speed and precision cold continuous rolling mode is made up of around take-up machine, lubricating and cooling system, online thickness, width monitoring and automatic control system paying out machine, multi-joint milling train, steel belt layer, also should comprise the closed-loop control system that thickness, width dimensions on-line monitoring and horizontal roll, the automatic governor motion of vertical roller roll gap are formed, this system can make rolling accuracy should guarantee thickness deviation Δ δ≤0.02mm at least, can reach 0.001mm; Vmax is greater than 100m/min for roll line speed, can reach 1,200m/min.
Carrying out steel band after this process of bright annealing heat treatment is handled through online or concentrated batch can guarantee in thereafter flux-cored wire moulding, tube reducing process directly to make no longer through other heat treatment
The finished product flux-cored wire.
Use the flux-cored wire special make-up machine can guarantee medicinal powder fully compacting in the base pipe, can be when rolling or next step drawing in the base pipe free play.
The multi-joint wire drawing machine that uses can guarantee by the filament of drawing enough bending radius are arranged, and medicinal powder is spilt leakage, prevents that simultaneously the finished product welding wire from producing spatial warping, and enough production efficiency is arranged.
Superiority of the present invention is: (1) is compared with common steel band method, and the present invention adopts high speed hot rolling dish round steel wire rod to replace wide cold-rolling band steel, greatly reduces the cost of raw material; Adopt the accurate steel band of continuous overlength non junction, saved the steel band welding point aided process time, reduced the end breakage rate in rolling, the drawing tube reducing operation, improved the equipment rate of working continuously, further reduced production cost; (2) compare with the disc-method of having applied for, the present invention adopts the high speed and precision tandem mills, solved by the uppity difficult problem of dish round steel wire rod its sheetmetal rolling accuracy of direct rolling flux-cored wire, because the special-purpose accurate steel band dimensional accuracy height of flux-cored wire improves the filling rate precision greatly.When filling rate was 15%, the absolute error of filling rate≤0.2% was enhanced about more than once than usual method; (3) compare with the disc-method of having applied for, production efficiency of the present invention can significantly improve, and production cost declines to a great extent.Method in the past is difficult to further raising because the fluting of dish circle and the speed of production that is rolled into U-lag are subjected to the restriction that the road, back adds powder operation speed; Simultaneously under without heat treated condition, cold rolling fully, cold drawing molding, dish circle wire rod feed diameters can not be excessive, generally only is suitable for
Following diameter dish round steel wire rod because the inlet wire diameter is little, also makes its production efficiency lower.Adopt this programme can give full play to high speed and precision tandem mills characteristics, mill speed reaches as high as 1000m/min, and the inlet wire diameter can reach
Production efficiency can improve 10 times, even more.Therefore, though the bright annealing operation increases by 1%～1.5% cost, totle drilling cost still can descend 20% than steel band method, descends 10% than other disc-method; (4) adopt the special-purpose accurate steel band of flux-cored wire to concentrate bright annealing Technology for Heating Processing in batches, can make the hardness of final products flux-cored wire, deflection be optimized to optimum value, substantially improve the Wire Performance of welding wire, reduced wearing and tearing ignition tip.
(4) Figure of description:
Accompanying drawing one: employing dish round steel wire rod is made the process chart of the new technology of flux-cored wire;
Accompanying drawing two: the special-purpose accurate steel band production technology block diagram of flux-cored wire;
Accompanying drawing three: the blank steel band is rolled into U type groove fills out powder and the flow chart of the moulding of healing up;
Accompanying drawing four: manufacture a finished product-flow chart of high speed drawing tube reducing;
Accompanying drawing five: on the high speed layer winder with the artwork of flux-cored wire layer on the vinyl disc;
Accompanying drawing six: the cross sectional shape figure of the special-purpose accurate steel band of several flux-cored wires of preparation;
Accompanying drawing seven: several flux-cored wire cross sectional shape schematic diagrames of making;
Accompanying drawing eight: the equipment series figure of high speed and precision cold continuous rolling mode.
(5) specific embodiment:
Embodiment: get
H08A high speed hot rolling dish round steel, through peel off the rust cleaning cold drawn sizing be
The dish round steel wire places on the paying out machine of high speed and precision tandem mills, is shaped to the blank steel band by six tandem mill once cold rolling, is of a size of width B=12 ± 0.03mm, thickness δ=0.80 ± 0.005mm, by the rolling of take-up machine, linear velocity 480m/min.To place putting on the band machine of flux-cored wire forming machine group through the heat treated blank steel band of bright annealing, and be rolled into U type open tube, fill medicinal powder, rollingly heal up, roll forming and rolling tube reducing, make
The flux-cored wire semi-finished product, filling rate 16%, filling rate absolute error≤± 0.2%.Add the steel band maximum line velocity 120m/min of powder place.Place 10 to connect on the paying out machine of high speed straight drawing machine the semi-finished product welding wire, gage of wire is after the drawing
Welding wire outlet maximum line velocity 1200m/min.The finished product welding wire is placed on the paying out machine of high speed layer winder, carry out flux-cored wire dish dress layer around rolling, rolling speed 980m/min finishes the finished product welding wire package.
Claims (10)
1. one kind is adopted the technology of coiling round steel wire rod manufacturing flux-cored wire, it is characterized in that may further comprise the steps:
(1) employing dish round steel wire rod is a raw material;
(2) the special-purpose accurate steel band of preparation flux-cored wire:
Adopting high speed hot rolling dish round steel wire rod is raw material, behind mechanical descaling, rust cleaning or mechanical descaling+cathodic pickling rust cleaning, cold drawn sizing, on the high speed and precision tandem mills of special use, use the cold continuous rolling mode, be incorporated under the control of automatic measuring and controlling system by series of rollers pass groups such as plain-barreled roll, edger roll, plain-barreled roll, edger roll, format roll, crosshead rollers, be rolled into the special-purpose accurate steel band of flux-cored wire, heat-treat stand-by thereafter;
(3) adopt the accurate steel band of above-mentioned steps (2) to produce semi-finished product flux-cored wire base pipe: fill the type groove of medicinal powder, flux-cored wire semi-finished product base pipe is made in the moulding and suppress cold footpath of healing up behind the filling medicinal powder in the type groove, and this semi-finished product base pipe diameter is
2.5～
5.0mm;
(4) manufacture a finished product-the high speed drawing tube reducing:
Adopt 6～14 high-speed straight-line harmonizing type wire drawing machinees with flux-cored wire semi-finished product drawing tube reducing, make the flux-cored wire finished product;
(5) packed products-high-speed layer is around rolling:
On the high speed layer winder with the flux-cored wire layer on vinyl disc and carry out vacuum packaging.
2. according to the said a kind of technology that adopts dish round steel wire rod to make flux-cored wire of claim 1, it is characterized in that the specification of said raw material high speed hot rolling dish round steel wire rod in the step (2) is
5.5～
10mm, in the material except that Fe each constituent content percentage be C≤0.08%, S, P≤0.035%, Mn≤0.60%, Si≤0.40%.
3. according to the said a kind of technology that adopts dish round steel wire rod to make flux-cored wire of claim 2, it is characterized in that to contain in the material of raw material high speed hot rolling dish round steel wire rod one or two or more kinds of column element down, Ni≤1% wherein, Cr≤0.5%, Re≤0.1%, Ti≤0.1%, B≤0.01%, Cu≤0.6%, Al≤0.2%, and O≤70ppm, N≤70ppm.Typical case's material is H08A, and the general value of chemical composition is: C=0.05～0.07%, S, P≤0.02%, Si=0.02～0.03%, Mn=0.3～0.5%, Cu≤0.02%, Al≤0.06%, O≤50ppm, N≤50ppm.
4. according to the said a kind of technology that adopts dish round steel wire rod to make flux-cored wire of claim 1, it is characterized in that the special-purpose accurate steel band of flux-cored wire is the overlength non junction that is shaped with the wire rod rolling of dish round steel in the step (2), said overlength non junction at least 1, in the 000m, general 20, non junction in the 000m, the accurate special steel strip of physical dimension, its thickness deviation≤± 0.02mm, representative value=± 0.005～0.01mm,, width tolerance≤± 0.1mm, representative value=± 0.03～0.05mm; Its width dimensions B=10～16mm, gauge δ=0.5～1.0mm; Its typical section is shaped as the general square-section of a., the odd-shaped cross section of b. band cork cot, the cross section of c. two ends band hypotenuse; Other size and cross sectional shape are not limited to above three kinds, and the shape at edge especially also can be for making the heal up form of tight other similar design of finished product welding wire.
5. according to the said a kind of technology that adopts dish round steel wire rod to make flux-cored wire of claim 1, it is characterized in that said high speed and precision cold continuous rolling mode is made up of around take-up machine, lubricating and cooling system, online thickness, width monitoring and automatic control system paying out machine, multi-joint milling train, steel belt layer in the step (2), it comprises and is no less than two horizontal roll unit and is no less than two vertical roller unit that rolling if desired accurate in size cross section then need increase the roll unit that a crosshead makes up at least again with the cross section that needs rolling band cork cot; Also should comprise the closed-loop control system that thickness, width dimensions on-line monitoring and horizontal roll, the automatic governor motion of vertical roller roll gap are formed.
6. according to the said a kind of technology that adopts dish round steel wire rod to make flux-cored wire of claim 1, it is characterized in that said roll pass combination is six tandem mills in the step (2), each breast roller pass and compound mode be a pair of diameter of first frame 〉=
200mm horizontal roll, a pair of diameter of the 3rd frame 〉=
The 120mm horizontal roll, the second, each a pair of vertical edger roll (or claiming edger roll) that has groove of four frames, the 5th frame two horizontal rolls is up and down formed closed type, the 6th frame four rollers is up and down formed closed type, but its roll pass and compound mode, and, also comprise to roll out other roll pass and the compound mode thereof of cross sectional shape as described in Figure 8 not only in this.
7. according to the said a kind of new technology that adopts dish round steel wire rod to make flux-cored wire of claim 1; it is characterized in that the said long precise steel band that goes out with the wire rod rolling of dish round steel generally will be under protective atmosphere in the step (2) on the high speed and precision tandem mills of special use; carry out bright annealing heat treatment, this protective atmosphere can be hydrogen (H
2) gas or N
2+ H
2Gas, annealing temperature≤650 ℃, temperature retention time is selected 0.5～12 hour according to raw materials size and finished size; Said heat treatment is to carry out bright annealing heat treatment, when the entry table steel wire rod≤
5.5mm, or finished diameter 〉=
1.6mm without bright annealing heat treatment; It is said that to carry out bright annealing heat treatment be that online or concentrated batch carries out bright annealing heat treatment.
8. according to the said a kind of technology that adopts dish round steel wire rod to make flux-cored wire of claim 1, it is characterized in that said use flux-cored wire special make-up machine in the step (3), the outlet diameter of flux-cored wire base pipe 〉=
2.5mm, can adopt tandem rolling mode greater than 7 frames, that also can adopt the tandem rolling that is no less than 5 frames to add to be no less than the combination of 2 wire drawing jars rolls-pulls out mode.
9. according to the said a kind of technology that adopts dish round steel wire rod to make flux-cored wire of claim 1, it is characterized in that said finished product is the flux-cored wire finished product, can there be overlap joint interface, the c. scarf joint interface of three kinds of form a.O shape mating interfaces, b. band cork cot in its cross section.Typical sizes is
0.8mm,
1.0mm,
1.2mm,
1.4mm,
1.6mm.
10. according to the said a kind of technology that adopts dish round steel wire rod to make flux-cored wire of claim 1, it is characterized in that the multi-joint wire drawing machine that uses in the step (4) should be straight line harmonizing type wire drawing machine or loop type linear drawing machine, its wire drawing tank diameter exists
Between 350～550mm.
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| CN2007100567074A CN101239430B (en) | 2007-02-05 | 2007-02-05 | Technique for manufacturing flux-cored wire from disk round steel wire bar |
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| CN1101312A (en) * | 1993-10-04 | 1995-04-12 | 东北大学 | Rolling method for manufacturing flux-cored welding electrode from wire rods |
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-
2007
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