CN115631894A - Tin-plated copper stranded wire production process capable of reducing wire breakage rate - Google Patents
Tin-plated copper stranded wire production process capable of reducing wire breakage rate Download PDFInfo
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- CN115631894A CN115631894A CN202210990640.6A CN202210990640A CN115631894A CN 115631894 A CN115631894 A CN 115631894A CN 202210990640 A CN202210990640 A CN 202210990640A CN 115631894 A CN115631894 A CN 115631894A
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 201
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 98
- 239000010949 copper Substances 0.000 title claims abstract description 98
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 53
- -1 diethyl phosphoramidate-phenylboronate compound Chemical class 0.000 claims abstract description 33
- 238000007605 air drying Methods 0.000 claims abstract description 29
- 238000004140 cleaning Methods 0.000 claims abstract description 29
- 238000000137 annealing Methods 0.000 claims abstract description 21
- 238000002791 soaking Methods 0.000 claims abstract description 14
- 238000002360 preparation method Methods 0.000 claims abstract description 13
- 238000005406 washing Methods 0.000 claims abstract description 11
- 230000001050 lubricating effect Effects 0.000 claims abstract description 9
- 238000005491 wire drawing Methods 0.000 claims description 49
- 238000005554 pickling Methods 0.000 claims description 43
- 238000003756 stirring Methods 0.000 claims description 33
- 239000007788 liquid Substances 0.000 claims description 27
- 238000001816 cooling Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 20
- 230000008569 process Effects 0.000 claims description 19
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 18
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 13
- 239000002518 antifoaming agent Substances 0.000 claims description 13
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims description 13
- 239000012964 benzotriazole Substances 0.000 claims description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 12
- HXITXNWTGFUOAU-UHFFFAOYSA-N dihydroxy-phenylborane Natural products OB(O)C1=CC=CC=C1 HXITXNWTGFUOAU-UHFFFAOYSA-N 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 10
- YMXIIVIQLHYKOT-UHFFFAOYSA-N 3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)aniline Chemical compound O1C(C)(C)C(C)(C)OB1C1=CC=CC(N)=C1 YMXIIVIQLHYKOT-UHFFFAOYSA-N 0.000 claims description 9
- 239000012425 OXONE® Substances 0.000 claims description 9
- HJKYXKSLRZKNSI-UHFFFAOYSA-I pentapotassium;hydrogen sulfate;oxido sulfate;sulfuric acid Chemical compound [K+].[K+].[K+].[K+].[K+].OS([O-])(=O)=O.[O-]S([O-])(=O)=O.OS(=O)(=O)O[O-].OS(=O)(=O)O[O-] HJKYXKSLRZKNSI-UHFFFAOYSA-I 0.000 claims description 9
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 9
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 9
- 150000003839 salts Chemical class 0.000 claims description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 239000002480 mineral oil Substances 0.000 claims description 8
- 235000010446 mineral oil Nutrition 0.000 claims description 8
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 8
- 229910052710 silicon Inorganic materials 0.000 claims description 8
- 239000010703 silicon Substances 0.000 claims description 8
- 239000003513 alkali Substances 0.000 claims description 7
- 230000000844 anti-bacterial effect Effects 0.000 claims description 7
- 239000003899 bactericide agent Substances 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 239000002131 composite material Substances 0.000 claims description 7
- 239000007822 coupling agent Substances 0.000 claims description 7
- 239000003755 preservative agent Substances 0.000 claims description 7
- 230000002335 preservative effect Effects 0.000 claims description 7
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 6
- 239000003995 emulsifying agent Substances 0.000 claims description 6
- 238000011049 filling Methods 0.000 claims description 6
- 230000014759 maintenance of location Effects 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 6
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 5
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 claims description 5
- DMSMPAJRVJJAGA-UHFFFAOYSA-N benzo[d]isothiazol-3-one Chemical compound C1=CC=C2C(=O)NSC2=C1 DMSMPAJRVJJAGA-UHFFFAOYSA-N 0.000 claims description 5
- 235000011187 glycerol Nutrition 0.000 claims description 5
- 239000002808 molecular sieve Substances 0.000 claims description 5
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 5
- BXRFQSNOROATLV-UHFFFAOYSA-N 4-nitrobenzaldehyde Chemical compound [O-][N+](=O)C1=CC=C(C=O)C=C1 BXRFQSNOROATLV-UHFFFAOYSA-N 0.000 claims description 4
- YNAVUWVOSKDBBP-UHFFFAOYSA-N Morpholine Chemical compound C1COCCN1 YNAVUWVOSKDBBP-UHFFFAOYSA-N 0.000 claims description 4
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 4
- 229930195729 fatty acid Natural products 0.000 claims description 4
- 239000000194 fatty acid Substances 0.000 claims description 4
- 239000000706 filtrate Substances 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- LXCYSACZTOKNNS-UHFFFAOYSA-N diethoxy(oxo)phosphanium Chemical compound CCO[P+](=O)OCC LXCYSACZTOKNNS-UHFFFAOYSA-N 0.000 claims description 3
- 150000002191 fatty alcohols Chemical class 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- OYWRDHBGMCXGFY-UHFFFAOYSA-N 1,2,3-triazinane Chemical compound C1CNNNC1 OYWRDHBGMCXGFY-UHFFFAOYSA-N 0.000 claims description 2
- GIAFURWZWWWBQT-UHFFFAOYSA-N 2-(2-aminoethoxy)ethanol Chemical compound NCCOCCO GIAFURWZWWWBQT-UHFFFAOYSA-N 0.000 claims description 2
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 2
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 2
- 150000007942 carboxylates Chemical class 0.000 claims description 2
- 150000002148 esters Chemical class 0.000 claims description 2
- 150000004665 fatty acids Chemical class 0.000 claims description 2
- 239000004519 grease Substances 0.000 claims description 2
- 229920000570 polyether Polymers 0.000 claims description 2
- 235000019353 potassium silicate Nutrition 0.000 claims description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 abstract description 13
- 239000000314 lubricant Substances 0.000 abstract description 12
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 10
- 239000002253 acid Substances 0.000 abstract description 3
- 230000003301 hydrolyzing effect Effects 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 30
- 238000012360 testing method Methods 0.000 description 18
- 239000012530 fluid Substances 0.000 description 8
- 239000002199 base oil Substances 0.000 description 6
- 239000000344 soap Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000000839 emulsion Substances 0.000 description 5
- 230000007062 hydrolysis Effects 0.000 description 5
- 238000006460 hydrolysis reaction Methods 0.000 description 5
- 238000005461 lubrication Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000004530 micro-emulsion Substances 0.000 description 5
- 239000003921 oil Substances 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 239000000654 additive Substances 0.000 description 4
- 239000013530 defoamer Substances 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- WWILHZQYNPQALT-UHFFFAOYSA-N 2-methyl-2-morpholin-4-ylpropanal Chemical compound O=CC(C)(C)N1CCOCC1 WWILHZQYNPQALT-UHFFFAOYSA-N 0.000 description 3
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 3
- 229910002651 NO3 Inorganic materials 0.000 description 3
- 229910019142 PO4 Inorganic materials 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 229910001431 copper ion Inorganic materials 0.000 description 3
- 125000006575 electron-withdrawing group Chemical group 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 3
- 239000010452 phosphate Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000001804 emulsifying effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000013112 stability test Methods 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- VXWBQOJISHAKKM-UHFFFAOYSA-N (4-formylphenyl)boronic acid Chemical compound OB(O)C1=CC=C(C=O)C=C1 VXWBQOJISHAKKM-UHFFFAOYSA-N 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 240000000233 Melia azedarach Species 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000000845 anti-microbial effect Effects 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000012038 nucleophile Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- ONJQDTZCDSESIW-UHFFFAOYSA-N polidocanol Chemical compound CCCCCCCCCCCCOCCOCCOCCOCCOCCOCCOCCOCCOCCO ONJQDTZCDSESIW-UHFFFAOYSA-N 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
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- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 1
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/02—Stranding-up
- H01B13/0207—Details; Auxiliary devices
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Metal Extraction Processes (AREA)
Abstract
The invention discloses a tinned copper stranded wire production process for reducing wire breakage rate, which belongs to the technical field of cable preparation and comprises the following steps: soaking and cleaning the copper wire and then air-drying; acid washing, water washing and air drying; unreeling, drawing and straightening; drawing to obtain copper monofilaments; hot tinning treatment; annealing; and stranding to prepare the tinned copper stranded wire. The lubricant prepared in the invention is a diethyl phosphoramidate-phenylboronate compound, compared with the traditional borate lubricant, the borate is more stable due to a conjugate effect formed among phenyl groups in the structure, and the hydrolytic stability can be improved due to a stereoscopic effect of the phenyl groups, so that the low breakage rate and the good lubricating property of copper wires can be ensured during production.
Description
Technical Field
The invention relates to the technical field of copper stranded wire production, in particular to a tinned copper stranded wire production process for reducing wire breakage rate.
Background
In the production of electric wires and cables, the most commonly used plated conductor is tinned copper wire, which is mainly used for the conductive core of rubber-insulated mining cables, locomotive cables, marine cables, and the like, and the outer shielding braid of the electric wires and cables. After the copper wire is tinned, the problems of oxidation of the copper wire, rubber stickiness caused by contact of the copper wire and the rubber, blackening of the copper wire and the like can be effectively prevented, and meanwhile, the service life of the cable is prolonged and the weldability of a wire core is improved. The tinned copper stranded wire is prepared by drawing a copper product, tinning the drawn copper, and then twisting the tinned copper wire to compound other materials. The copper wire is an important component of the tinned copper stranded wire, the quality of the copper wire directly influences the quality of the tinned copper stranded wire, and the copper wire is mainly produced by taking a copper rod with the thickness of 8mm as a raw material and drawing the copper rod into single wires of middle wires, fine wires, micro wires, ultra-micro wires and the like with different specifications through a large drawing machine, a middle drawing machine, a fine drawing machine and a micro drawing machine. The diameter of the copper wire produced by the large, medium and fine drawing process is between 3 and 0.1mm, and the copper wire is most widely applied to the wire and cable industry. In the drawing process of copper wires, the deformation of blanks is large, the frictional wear phenomenon is very serious, and meanwhile, as the modern wire drawing speed is as high as 800-3000 m/min, a large amount of heat is generated in the deformation process, so that the temperature of a die is rapidly increased, and therefore, the lubricating agent is required to have excellent lubricating property and cooling property. In addition, in order to prevent copper powder from adhering around the die to block the die hole during wire drawing, thereby causing wire breakage, the lubricant is required to have excellent cleanability. In order to ensure the smoothness of the metal surface after wire drawing, the lubricant is required to have good rust-proof and corrosion-proof effects.
The steel wire drawing liquid mainly comprises base oil, an emulsifier, a coupling agent, a lubricant, an antirust preservative, an alkali retention agent, a bactericide, a defoaming agent and the like. At present, water-based lubricants are commonly used in copper wire drawing processing, and emulsions and microemulsions are most widely used. Compared with emulsion, the microemulsion has higher stability, long service life and good cleaning performance, thus becoming the development direction of copper wire drawing liquid for a long time. In the large and medium drawing processes, the required microemulsion concentration is higher due to large reducing rate and heavy lubrication; the fine drawing process focuses more on cleaning performance and requires lower concentration of microemulsion. In the process of developing the wire drawing liquid, the relationship between good lubricity and cleaning property needs to be balanced at the same time. According to the characteristics of the copper wire drawing process, the following requirements are provided for the base oil: (1) has good emulsifying performance. Naphthenic base oils are most excellent in emulsifying performance, but are expensive. In addition, the viscosity at 40 ℃ is respectively 5-15 mm 2 The sum of the diameters of the particles and the diameter of the particles is 30-56 mm 2 The paraffin-based oil/s is easy to emulsify, and the cleanability of the workpiece is good; (2) has low viscosity. On one hand, the low-viscosity oil has good cooling property and cleaning property, and on the other hand, other additives in the microemulsion have certain thickening effect on the base oil to increase the product viscosity, so the low-viscosity oil is selectedA base oil of viscosity; (3) In order to ensure the safety of transportation and storage, the flash point of the selected base oil is not too low; and (4) the cost performance is high.
The pH value of the wire drawing liquid is generally stabilized at 8.5-9.0. The pH of the drawing fluid is typically lowered during the manufacturing process, and a decrease in pH results in a decrease in the antimicrobial capacity of the drawing fluid. Too high pH value can generate soap precipitation tendency, cause unclean cone pulley and die, decrease lubricating property of wire drawing liquid, and cause wire pressing and breaking in the starting process or die penetrating process. Therefore, to ensure the fracture resistance of the steel wire, the lubricity and stability of the wire drawing fluid are important, the lubricity can reduce the frictional wear during the wire drawing process, which directly affects the quality of the steel wire, and the stability can ensure that the wire drawing fluid is not easy to deteriorate during the use process, thereby affecting the lubricity.
The patent CN 101834013B is realized by the following technical scheme: a high-strength copper stranded wire comprises a plurality of tinned or silvered or nickelled copper wires and steel wires. The invention has good transmission performance and strong mechanical performance, and makes up the defects of the background technology.
Patent CN 111872155A discloses a copper wire drawing method for producing tinned copper stranded wires, which comprises the following specific steps: s1, cleaning; s2, acid washing and cleaning; s3, straightening; s4, drawing; s5, annealing; and S6, taking up, packaging and warehousing. The method has the advantages of reasonable wire drawing steps, convenient operation, capability of drawing the copper wire into the copper wire with finer diameter, capability of effectively preventing the phenomenon of nonuniform wire drawing, improvement on the production quality of the copper wire, simple wire drawing process and low cost, improves the wire drawing effect by cleaning the surface of the copper wire through the pickling solution and drawing and lubricating the wire drawing solution, ensures that the obtained copper wire has smooth and complete surface and is not easy to oxidize and blacken, ensures that the product appearance has better brightness and consistency, and further improves the production of the copper wire.
The mode that the broken string rate about reducing copper strands among the prior art mostly adopts and strand it with steel wire or high strength material is in order to promote intensity to reduce the broken string, however, the poor problem that makes the broken string rate high of lubricating property when this kind of mode does not solve the wire drawing, consequently, develops a tinned copper stranded conductor technology that can effectively reduce the broken string rate and has certain meaning to promoting copper strands production efficiency.
Disclosure of Invention
In view of the above-mentioned defects in the prior art, the technical problem to be solved by the invention is to prepare a tin-plated copper stranded wire production process for reducing the wire breakage rate.
In the copper wire drawing production process in the cable industry, copper wire drawing liquid is generally used as a wire drawing lubricant to realize high-speed and effective production. In actual production, the following problems often occur: (1) The copper ions react with fatty acid anions in the wire drawing liquid to generate divalent copper soap which is insoluble in water. After being separated out, the copper soaps are blocked in a wire-drawing die, so that emulsion cannot be completely carried into a die orifice along with a copper wire and passes through the wire-drawing die to be adhered to the surface of the copper wire, and physical lubrication failure is caused; (2) Copper ions react with unsaturated fatty acid in the wire drawing liquid to generate a dark green sticky substance-aliphatic polymer, the formed sticky substance-aliphatic polymer is quickly separated from a water-based system and floats on the surface of an oil pool, and the oily polymer and the formed copper soap attract active fatty acid boundary lubricant together to cause emulsification failure, lubricant splitting, lubrication failure and emulsion failure, so that wire breakage and wire shrinkage are caused, the quality and the production efficiency of copper wires are seriously affected, even the wire drawing production line is forced to stop production, and direct economic loss is brought to enterprises.
The borate additive belongs to organic boride, has more types and is widely applied. The additive has good antifriction and antiwear properties and oxidation resistance stability, and has corrosivity and selectivity on some materials unlike the traditional sulfur, phosphorus and chlorine type antiwear agents. It has excellent sterilizing, anticorrosive, antirust, antiwear and antistatic performance and may be used widely in photo-thermal initiator, high polymer additive, antiseptic, fire retardant and other fields. However, boron, as an electron-deficient element, is easily combined with water in the air to undergo hydrolysis, and thus is insoluble in oil or precipitates in lubricating oil. Therefore, modification of organoborates to improve their stability is needed. According to the invention, phenyl is introduced into borate, phosphate is further grafted, the possibility of being attacked by nucleophiles is reduced through the groups with three-dimensional barrier property, the conjugate structure formed by the phenyl and the carbon-nitrogen double bond enables the compound to be more stable, so that the compound is not easy to hydrolyze, the stability of the prepared wire drawing liquid is ensured, and the phosphate boride can be adsorbed on the metal surface to form a compact adsorption protection film, so that the wire drawing liquid also has good lubricating property.
The technical scheme of the invention is as follows:
a tin-plated copper stranded wire production process capable of reducing wire breakage rate comprises the following steps:
s1, soaking and cleaning a copper wire, and then air-drying;
s2, carrying out acid washing and water washing on the copper wire after cleaning and air drying, and carrying out air drying again;
s3, unwinding, drawing and straightening the cleaned and air-dried copper wire;
s4, straightening and drawing to obtain copper monofilaments;
s5, carrying out hot tinning process treatment on the copper monofilament;
s6, conveying the treated copper wire to an annealing furnace for treatment;
s7, stranding the treated multiple strands of tinned copper monofilaments by using a precision stranding machine to prepare tinned copper stranded wires.
A tin-plated copper stranded wire production process capable of reducing wire breakage rate comprises the following steps:
s1, soaking and cleaning 3000-3500 parts by weight of copper wires for 5-15 min, cleaning the copper wires through a soft brush after soaking, and then air-drying the copper wires for 20-30 min through a fan;
s2, placing the cleaned and air-dried copper wire into a pickling tank with pickling solution, pickling the surface of the copper wire through the pickling solution, cleaning the copper wire again after the pickling is finished, and then air-drying the copper wire for 20-30 min through a fan;
s3, unreeling the cleaned and air-dried copper wire, and conveying one end of the copper wire forwards under the traction of a traction force, and straightening by a straightening device;
s4, drawing the straightened copper wire for multiple passes, continuously spraying a wire drawing liquid during drawing to obtain a copper wire, washing with water, and then air-drying for 20-30 min by a fan;
s5, carrying out hot tinning process treatment on the copper wire, wherein the temperature of tin water is 280-290 ℃, carrying out tinning in a tinning furnace, carrying out water cooling at 0-10 ℃, and then carrying out air drying for 10-20 min by a fan;
s6, conveying the treated copper wire to an annealing furnace, filling nitrogen into the annealing furnace, keeping the temperature in the annealing furnace to be 250-350 ℃ within 10-15 min, preserving the heat for 2-3 h, cooling for 0.5-1 h, opening a furnace door, and naturally cooling to room temperature;
s7, stranding 8-10 treated tinned copper monofilaments by a stranding machine to prepare tinned copper stranded wires, wherein the diameter of each copper monofilament is 0.10-0.16 mm, stranding is carried out in the same direction, the stranding distance is controlled to be 8-10 mm, and the stranding speed is 10-20 m/min, so that the tinned copper stranded wires are obtained.
Preferably, the pickling solution consists of the following components in parts by weight: 5 to 10 portions of sulfuric acid, 10 to 20 portions of potassium monopersulfate composite salt, 0.5 to 1 portion of ammonium bisulfate, 0.1 to 0.3 portion of potassium persulfate, 0.5 to 1 portion of benzotriazole and 70 to 90 portions of water.
Preferably, the wire drawing liquid consists of the following components in parts by weight: 10 to 25 portions of diethyl phosphoramidate-phenylboronate compound, 15 to 30 portions of mineral oil, 1 to 10 portions of emulsifier, 4 to 8 portions of coupling agent, 1 to 3 portions of preservative, 1 to 2 portions of alkali retention agent, 1 to 5 portions of bactericide, 0.1 to 0.3 portion of defoaming agent and 30 to 60 portions of water.
Preferably, the drawing speed of the copper wire in the step S3 is 60 to 90m/min.
Further, the preparation method of the pickling solution comprises the following steps:
dividing water into three equal parts, adding 93-95 wt% sulfuric acid into 1/3 of water, stirring continuously, adding potassium monopersulfate complex salt, adding ammonium bisulfate, potassium persulfate and benzotriazole, finally adding the rest 2/3 of water, and stirring for 20-30 min to obtain the pickling solution.
Further, the preparation method of the wire drawing liquid comprises the following steps:
mixing and stirring the diethyl phosphoramidate-phenylboronate compound, the mineral oil and the fatty alcohol polyoxyethylene ether for 10-20 min, and then sequentially adding the coupling agent, the preservative, the alkali retention agent, the bactericide, the defoaming agent and the water into the mixture, mixing and stirring the mixture for 20-30 min to obtain the wiredrawing liquid.
Further, the preparation method of the diethyl phosphoramidate-phenylboronate compound comprises the following steps:
weighing 4-5 parts by weight of 3-aminophenylboronic acid pinacol ester by weight, adding the 3-aminophenylboronic acid pinacol ester into 40-50 parts by weight of dichloromethane, stirring until the 3-5 parts by weight of p-nitrobenzaldehyde and 0.1-0.2 part by weight of 4A molecular sieve are dissolved, stirring for 72-80 h at room temperature, filtering after the reaction is finished, and concentrating the filtrate to obtain a phenylboronic acid ester compound;
and X2, dissolving the phenylboronic acid ester compound obtained in the step X1 in 20-40 parts by weight of absolute ethyl alcohol, adding 2-3 parts by weight of diethyl phosphite, heating to 70-80 ℃, stirring for 20-24 hours, and concentrating after the reaction is finished to obtain the diethyl phosphoramidate-phenylboronic acid ester compound.
Further, the emulsifier is one of fatty alcohol-polyoxyethylene ether, alkylphenol ethoxylate and fatty acid-polyoxyethylene ester.
Further, the coupling agent is one of lubricating grease, glycerin and water glass.
Further, the preservative is one of amide caproate, carboxylate and benzotriazole.
Further, the alkali retention agent is one of monoethanolamine, diglycolamine and triethanolamine.
Further, the bactericide is one of hexahydrotriazine, morpholine and benzisothiazolinone.
Further, the defoaming agent is one of an organic silicon defoaming agent, a polyether defoaming agent and a non-silicon defoaming agent.
Compared with the prior art, the invention has the following beneficial effects:
(1) The drawing fluid used in the invention adopts diethyl phosphoramidate-phenylboronate compound as a lubricant, and introduces phenyl and phenylboronate to form a conjugate effect, so that the structure is more stable, the space effect of the phenyl can stabilize the borate molecules, and the nitrate ions on the phenyl can attract electrons as a strong electron-withdrawing group, thereby reducing the hydrolysis of the borate, and the prepared drawing fluid has good hydrolysis stability;
(2) Due to good lubricity and stability, the copper wire can be kept continuous in the wire drawing production process, and the produced copper stranded wire has excellent performance, so that the low wire breakage rate can be ensured in the production process, and the copper stranded wire also has good mechanical properties.
Detailed Description
Hereinafter, the technical solution of the present invention will be described in detail by specific examples, but these examples should be explicitly proposed for illustration, but should not be construed as limiting the scope of the present invention.
The parameters of part of the raw materials in the embodiment of the invention are as follows:
sulfuric acid, 95wt%, merck chemistry.
Copper wire drawing liquid S565, pH =8.5 +/-0.5, anmei science and technology.
Mineral oil, specific gravity: 0.78, new material of Jinlan of Jinan province.
Fatty alcohol-polyoxyethylene ether, AEO-9, hydroxyl value: 95-100, and Guangzhou Junxin chemical industry.
The type of the Dow organic silicon defoamer is as follows: AFE-3168, content: 30wt% of a new Suzhou antfu material.
3-aminophenylboronic acid pinacol ester, content: 97wt% and Aladdin.
4A molecular sieve, specification: 1.7-2.5 mm, lian Hai Xin chemical industry.
Potassium monopersulfate complex salt, pH = 2.0-2.4 (25 ℃ 1% aqueous solution), anhui eight-funnel chemical industry.
Comparative example 1
A tin-plated copper stranded wire production process capable of reducing wire breakage rate comprises the following steps:
s1, soaking and cleaning a copper wire for 15min, cleaning the copper wire through a soft brush after soaking, and air-drying the copper wire for 20min through a fan;
s2, placing the cleaned and air-dried copper wire into a pickling tank with 30kg of pickling solution, pickling the surface of the copper wire through the pickling solution, cleaning the copper wire again after the pickling is finished, and then air-drying the copper wire for 30min through a fan;
s3, unreeling the copper wire cleaned and air-dried in the step S2, and conveying one end of the copper wire forwards under the traction of a traction force at a traction speed of 60m/min, and straightening by a straightening device;
s4, drawing the straightened copper wire for multiple times, continuously spraying 9.76kg of copper drawing liquid S565 during drawing to obtain the copper wire, washing with water, and then air-drying for 20min by a fan;
s5, carrying out hot tinning process treatment on the copper wire, wherein the temperature of tin water is 280 ℃, carrying out tinning in a tinning furnace, carrying out water cooling at 5 ℃, and carrying out air drying for 10min by a fan;
s6, conveying the treated copper wire to an annealing furnace, filling nitrogen into the annealing furnace, keeping the temperature in the annealing furnace at 350 ℃ within 15min, keeping the temperature for 2h, cooling for 0.5h, opening a furnace door, and naturally cooling to room temperature;
s7, stranding the treated 9 strands of tinned copper monofilaments by a stranding machine to prepare tinned copper stranded wires, wherein the diameter of each copper monofilament is 0.10mm, stranding is carried out in the same direction, the stranding distance is controlled to be 8mm, and the stranding speed is 12m/min, so that the tinned copper stranded wires are obtained.
The preparation method of the pickling solution comprises the following steps:
30kg of water is divided into three equal parts, 1.67kg of 95wt% sulfuric acid is added into 1/3 of the water, stirring is not stopped, 3.33kg of potassium monopersulfate composite salt is added, 166g of ammonium hydrogen sulfate, 33g of potassium persulfate and 333g of benzotriazole are added, and the rest 2/3 of the water is added, and stirring is carried out for 30min, so as to prepare the pickling solution.
Example 1
A tin-plated copper stranded wire production process capable of reducing wire breakage rate comprises the following steps:
s1, soaking 300kg of copper wires in water, cleaning for 15min, cleaning through a soft brush after soaking, and air-drying for 20min through a fan;
s2, placing the cleaned and air-dried copper wire into a pickling tank with 30kg of pickling solution, pickling the surface of the copper wire through the pickling solution, cleaning the copper wire again after the pickling is finished, and then air-drying the copper wire for 30min through a fan;
s3, unreeling the copper wire cleaned and air-dried in the step S2, and conveying one end of the copper wire forwards under the traction of a traction force at a traction speed of 60m/min, and straightening by a straightening device;
s4, mixing and stirring 1kg of diethyl phosphoramidate-phenylboronate compound, 2kg of mineral oil and 1kg of fatty alcohol-polyoxyethylene ether for 20min, and then sequentially adding 400g of glycerol, 100g of benzotriazole, 150g of triethanolamine, 100g of benzisothiazolinone, 10g of organic silicon defoamer and 5kg of water, mixing and stirring for 30min to obtain a wire drawing solution;
s5, drawing the straightened copper wire for multiple times, continuously spraying 9.76kg of wire drawing liquid during drawing to obtain the copper wire, washing with water, and then air-drying for 20min by a fan;
s6, carrying out hot tinning process treatment on the copper wire, wherein the temperature of tin water is 280 ℃, carrying out tinning in a tinning furnace, carrying out water cooling at 5 ℃, and carrying out air drying for 10min by a fan;
s7, conveying the treated copper wire to an annealing furnace, filling nitrogen into the annealing furnace, keeping the temperature in the annealing furnace at 350 ℃ within 15min, keeping the temperature for 2h, cooling for 0.5h, opening a furnace door, and naturally cooling to room temperature;
s8, stranding the treated 9 strands of tinned copper monofilaments by a stranding machine to prepare a tinned copper stranded wire, wherein the diameter of each copper monofilament is 0.10mm, the copper monofilaments are stranded in the same direction, the stranding distance is controlled to be 8mm, and the stranding speed is 12m/min, so that the tinned copper stranded wire is obtained.
The preparation method of the pickling solution comprises the following steps:
dividing 30kg of water into three equal parts, adding 1.67kg of 95wt% sulfuric acid into 1/3 of the water, stirring continuously, adding 3.33kg of potassium monopersulfate composite salt, adding 166g of ammonium bisulfate, 33g of potassium persulfate and 333g of benzotriazole, finally adding the rest 2/3 of the water, and stirring for 30min to prepare the pickling solution.
The preparation method of the diethyl phosphoramidate-phenylboronate compound comprises the following steps:
weighing 4kg of 3-amino phenylboronic acid pinacol ester in X1, adding the 3kg of 3-amino phenylboronic acid pinacol ester into 35L of dichloromethane, stirring until the 3kg of p-nitrobenzaldehyde and 100g 4A molecular sieves are dissolved, stirring for 72 hours at room temperature, filtering after the reaction is finished, and concentrating the filtrate at-0.9MPa and 40 ℃ to obtain a phenylboronic acid ester compound;
and X2, dissolving the phenylboronic acid ester compound obtained in the step X1 in 40L of absolute ethyl alcohol, adding 2kg of diethyl phosphite, heating to 70 ℃, stirring for 24 hours, and concentrating at-0.9 MPa and 45 ℃ after the reaction is finished to obtain the diethyl phosphoramidate-phenylboronic acid ester compound.
Example 2
A tin-plated copper stranded wire production process capable of reducing wire breakage rate comprises the following steps:
s1, soaking and cleaning 300kg of copper wires for 15min, cleaning the copper wires through a soft brush after soaking is finished, and then air-drying the copper wires for 20min through a fan;
s2, placing the cleaned and air-dried copper wire into a pickling tank with 30kg of pickling solution, pickling the surface of the copper wire through the pickling solution, cleaning the copper wire again after the pickling is finished, and then air-drying the copper wire for 30min through a fan;
s3, unreeling the copper wire cleaned and air-dried in the step S2, and conveying one end of the copper wire forwards under the traction of a traction force at a traction speed of 60m/min, and straightening by a straightening device;
s4, mixing and stirring 1kg of phenylboronic acid ester compound, 2kg of mineral oil and 1kg of fatty alcohol-polyoxyethylene ether for 20min, and then sequentially adding 400g of glycerol, 100g of benzotriazole, 150g of triethanolamine, 100g of benzisothiazolinone, 10g of organic silicon defoamer and 5kg of water, mixing and stirring for 30min to obtain a wire drawing solution;
s5, drawing the straightened copper wire for multiple times, continuously spraying 9.76kg of wire drawing liquid during drawing to obtain the copper wire, washing with water, and then air-drying for 20min by a fan;
s6, carrying out hot tinning process treatment on the copper wire, wherein the temperature of tin water is 280 ℃, carrying out tinning in a tinning furnace, carrying out water cooling at 5 ℃, and carrying out air drying for 10min by a fan;
s7, conveying the treated copper wire to an annealing furnace, filling nitrogen into the annealing furnace, keeping the temperature in the annealing furnace at 350 ℃ within 15min, keeping the temperature for 2h, cooling for 0.5h, opening a furnace door, and naturally cooling to room temperature;
s8, stranding the treated 9 strands of tinned copper monofilaments by a stranding machine to prepare tinned copper stranded wires, wherein the diameter of each copper monofilament is 0.10mm, stranding is carried out in the same direction, the stranding distance is controlled to be 8mm, and the stranding speed is 12m/min, so that the tinned copper stranded wires are obtained.
The preparation method of the pickling solution comprises the following steps:
30kg of water is divided into three equal parts, 1.67kg of 95wt% sulfuric acid is added into 1/3 of the water, stirring is not stopped, 3.33kg of potassium monopersulfate composite salt is added, 166g of ammonium hydrogen sulfate, 33g of potassium persulfate and 333g of benzotriazole are added, and the rest 2/3 of the water is added, and stirring is carried out for 30min, so as to prepare the pickling solution.
The preparation method of the phenylboronate compound comprises the following steps:
weighing 4kg of 3-aminophenylboronic acid pinacol ester, adding the 3-aminophenylboronic acid pinacol ester into 35L of dichloromethane, stirring until the 3kg of p-nitrobenzaldehyde and the 100g 4A molecular sieves are dissolved, stirring for 72 hours at room temperature, filtering after the reaction is finished, and concentrating the filtrate at-0.9MPa and 40 ℃ to obtain the phenylboronic acid ester compound.
Example 3
A tin-plated copper stranded wire production process capable of reducing wire breakage rate comprises the following steps:
s1, soaking and cleaning 300kg of copper wires for 15min, cleaning the copper wires through a soft brush after soaking is finished, and then air-drying the copper wires for 20min through a fan;
s2, placing the cleaned and air-dried copper wire into a pickling tank with 30kg of pickling solution, pickling the surface of the copper wire through the pickling solution, cleaning the copper wire again after the pickling is finished, and then air-drying the copper wire for 30min through a fan;
s3, unreeling the copper wire cleaned and air-dried in the step S2, and conveying one end of the copper wire forwards under the traction of a traction force at a traction speed of 60m/min, and straightening by a straightening device;
s4, mixing and stirring 1kg of 4-formylphenylboronic acid, 2kg of mineral oil and 1kg of fatty alcohol-polyoxyethylene ether for 20min, and then sequentially adding 400g of glycerol, 100g of benzotriazole, 150g of triethanolamine, 100g of benzisothiazolinone, 10g of organic silicon defoamer and 5kg of water, mixing and stirring for 30min to obtain a wiredrawing liquid;
s5, drawing the straightened copper wire for multiple passes, continuously spraying 9.76kg of drawing liquid during drawing to obtain a copper wire, washing with water, and then air-drying for 20min by a fan;
s6, carrying out hot tinning process treatment on the copper wire, wherein the temperature of tin water is 280 ℃, carrying out tinning in a tinning furnace, carrying out water cooling at 5 ℃, and carrying out air drying for 10min by a fan;
s7, conveying the treated copper wire to an annealing furnace, filling nitrogen into the annealing furnace, keeping the temperature in the annealing furnace at 350 ℃ within 15min, keeping the temperature for 2h, cooling for 0.5h, opening a furnace door, and naturally cooling to room temperature;
s8, stranding the treated 9 strands of tinned copper monofilaments by a stranding machine to prepare tinned copper stranded wires, wherein the diameter of each copper monofilament is 0.10mm, stranding is carried out in the same direction, the stranding distance is controlled to be 8mm, and the stranding speed is 12m/min, so that the tinned copper stranded wires are obtained.
The preparation method of the pickling solution comprises the following steps:
30kg of water is divided into three equal parts, 1.67kg of 95wt% sulfuric acid is added into 1/3 of the water, stirring is not stopped, 3.33kg of potassium monopersulfate composite salt is added, 166g of ammonium hydrogen sulfate, 33g of potassium persulfate and 333g of benzotriazole are added, and the rest 2/3 of the water is added, and stirring is carried out for 30min, so as to prepare the pickling solution.
Test example 1
The tensile test was performed on the tin-plated copper stranded wires prepared in the control example and the example, and the experimental method refers to section 3 of the test method for bare wires of GB/T4909.3-2009: tensile test, the specific test method is: cutting three tin-plated copper stranded wires prepared in each case, wherein the length of a test piece is the original gauge length plus twice the clamping length of a jaw, and marking the original gauge length L in the middle of the test piece 0 The strands at the two ends of the test piece were unwound and separated and bent into a hook shape. After cleaning, the cone ends were poured with resin. And clamping the test piece in a jaw of the testing machine, wherein the position of the test piece after clamping is to ensure that the longitudinal axis of the test piece is coincided with the tensile central line. Starting the testing machine, stretching at the speed of 250mm/min, recording the maximum load and the gauge length Ls when the test piece is fractured after the test piece is fractured by stretching, and aligning the fractured parts together to ensure that the fractured parts are positioned on the gauge length L on a straight line after the test piece is fractured h . Taking down the test piece to align the fracture, extruding, measuring and recording the final gauge length L u . According to the recordThe tensile strength and the elongation at break were calculated from the values of (A) and (B) as follows.
σ b ＝F m (S-formula 1)
σ b Tensile strength in newtons per square millimeter (N/mm) 2 )；
F m -maximum force in newtons (N);
s-measured area of test piece in square millimeter (mm) 2 )。
Elongation at break is calculated according to equation 2:
δ s ＝(L s ﹣L 0 )/L 0 *100
δ s elongation at break in percent (%);
L s gauge length at break in millimeters (mm);
L 0 original gauge length in millimeters (mm).
Table 1 copper twisted wire tension test result table
When a copper wire is drawn, if copper ions react with fatty acid anions in a drawing fluid to generate bivalent copper soaps insoluble in water, the copper soaps are separated out and then blocked in a drawing die, so that emulsion cannot be completely carried into a die orifice along with the copper wire and passes through the drawing die to be adhered to the surface of the copper wire, physical lubrication failure is caused, the drawn copper filaments are easy to break during drawing due to the fact that good lubrication is not performed, and subsequent tensile resistance of the copper wire is affected due to the fact that a lubricating protective film without the surface is easy to wear when the copper filaments are used. In the invention, the drawing fluid used in example 1 adopts a diethyl phosphoramidate-phenylboronate compound as a lubricant, a phenyl group and phenylboronate are introduced to form a conjugated effect, the structure is more stable, the space effect of the phenyl group can stabilize borate molecules, nitrate ions on the phenyl group as a strong electron-withdrawing group can also attract electrons so as to reduce the hydrolysis of the borate, and the good lubricity and stability lead to that a copper wire can be kept continuous in the drawing production process and the produced copper stranded wire has excellent performance, so that the copper stranded wire shows the best tensile resistance in a mechanical property test.
Test example 2
The stability test was conducted on the copper drawing solutions used in the control examples and examples, and the conditions of the drawing solutions were observed after the copper drawing solutions were allowed to stand for 30 days at the same volume and at the same conditions, and the specific test results are shown in table 2.
Table 2 table of stability test results of different copper wire drawing liquids
It can be seen from the stability experiment that the stability of the wiredrawing liquids used in example 3 and the comparative example is the worst, the wiredrawing liquid is precipitated after standing for 30 days, the solutions are layered and are turbid, the instability greatly affects the wiredrawing production and subsequent performance of copper wires, while example 2,3 is better, the diethyl phosphoramidate-phenylboronate compound used in example 1 has a more stable structure due to the introduction of the conjugated effect of phenyl and phenylboronate, the steric effect of phenyl and phosphate can stabilize the borate molecules, and the nitrate ions on phenyl as a strong electron-withdrawing group can also attract electrons to reduce the hydrolysis of the borate itself, so the optimal hydrolytic stability is achieved.
Claims (10)
1. A tin-plated copper stranded wire production process is characterized by comprising the following steps:
s1, soaking and cleaning 3000-3500 parts by weight of copper wires for 5-15min, cleaning after soaking, and then air-drying for 20-30min by a fan;
s2, pickling the surface of the copper wire with a pickling solution after the copper wire is cleaned and air-dried, cleaning the copper wire again after the pickling is finished, and air-drying for 20 to 30min with a fan;
s3, unreeling the cleaned and air-dried copper wire, and conveying one end of the copper wire forwards under the traction of a traction force, and straightening by a straightening device;
s4, drawing the straightened copper wire for multiple times, continuously spraying a wire drawing liquid during drawing to obtain the copper wire, washing with water, and then air-drying for 20 to 30min by a fan;
s5, carrying out hot-dip tinning process treatment on the copper wire, wherein the temperature of tin water is 280-290 ℃, carrying out tinning in a tinning furnace, carrying out water cooling at 0-10 ℃, and carrying out air drying for 10-20min by a fan;
s6, conveying the treated copper wire to an annealing furnace, filling nitrogen into the annealing furnace, keeping the temperature in the annealing furnace within 10-15min to 250-350 ℃, preserving the heat for 2-3h, cooling for 0.5-1h, opening a furnace door, and naturally cooling to room temperature;
s7, stranding 8 to 10 processed tin-plated copper monofilaments by a stranding machine to prepare tin-plated copper stranded wires, wherein the diameter of each copper monofilament is 0.10 to 0.16mm, stranding is carried out in the same direction, the stranding distance is controlled to be 8 to 10mm, and the stranding speed is 10 to 20m/min, so as to obtain the tin-plated copper stranded wires;
the wire drawing liquid comprises the following components in parts by weight: 10-25 parts of diethyl phosphoramidate-phenylboronate compound, 15-30 parts of mineral oil, 1-10 parts of emulsifier, 4~8 parts of coupling agent, 1~3 parts of preservative, 1~2 parts of alkali holding agent, 1~5 parts of bactericide, 0.1-0.3 part of defoaming agent and 30-60 parts of water.
2. The tin-plated copper stranded wire production process according to claim 1, wherein the pickling solution consists of the following components in parts by weight: 5 to 10 parts of sulfuric acid, 10 to 20 parts of potassium monopersulfate composite salt, 0.5 to 1 part of ammonium bisulfate, 0.1 to 0.3 part of potassium persulfate, 0.5 to 1 part of benzotriazole and 70 to 90 parts of water.
3. The tin-plated copper stranded wire production process according to claim 1, characterized in that: the drawing speed of the copper wire in the step S3 is 60-90m/min.
4. The tin-plated copper stranded wire production process according to claim 2, wherein the preparation method of the pickling solution comprises the steps of:
dividing water into three equal parts, adding sulfuric acid into 1/3 of the water, continuously stirring, adding potassium monopersulfate composite salt, adding ammonium bisulfate, potassium persulfate and benzotriazole, finally adding the rest 2/3 of the water, and stirring for 20-30min to obtain the pickling solution.
5. The tin-plated copper stranded wire production process according to claim 1, wherein the preparation method of the wire drawing liquid comprises the steps of:
mixing and stirring diethyl phosphoramidate-phenylboronic acid ester compound, mineral oil and fatty alcohol polyoxyethylene ether for 10-20min, and then sequentially adding an emulsifier, a coupling agent, a preservative, an alkali retention agent, a bactericide, an antifoaming agent and water, mixing and stirring for 20-30min to obtain a wiredrawing liquid.
6. The tin-plated copper stranded wire production process according to claim 1 or 5, wherein the preparation method of the diethyl phosphoramidate-phenylboronate compound comprises the following steps:
weighing 3-aminophenylboronic acid pinacol ester 4~5 parts by weight, adding the 3-aminophenylboronic acid pinacol ester 4~5 parts by weight into dichloromethane of 40-50 parts by weight, stirring the mixture until the mixture is dissolved, adding 3~5 parts by weight of p-nitrobenzaldehyde and 0.1-0.2 part by weight of 4A molecular sieve, stirring the mixture at room temperature for 72-80h, filtering the mixture after the reaction is finished, and concentrating the filtrate to obtain a phenylboronic acid ester compound;
and X2, dissolving the phenylboronic acid ester compound in the step X1 in 20-40 parts by weight of absolute ethyl alcohol, adding 2~3 parts by weight of diethyl phosphite, heating to 70-80 ℃, stirring for 20-24h, and concentrating after the reaction is finished to obtain the diethyl phosphoramidate-phenylboronic acid ester compound.
7. The tin-plated copper stranded wire production process according to claim 5, characterized in that: the emulsifier is one of fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether and fatty acid polyoxyethylene ester.
8. The tin-plated copper stranded wire production process according to claim 5, characterized in that: the coupling agent is one of lubricating grease, glycerin and water glass; the preservative is one of amide caproate, carboxylate and benzotriazole.
9. The tin-plated copper stranded wire production process according to claim 5, characterized in that: the alkali retention agent is one of monoethanolamine, diglycolamine and triethanolamine.
10. The tin-plated copper stranded wire production process according to claim 5, characterized in that: the bactericide is one of hexahydrotriazine, morpholine and benzisothiazolinone; the defoaming agent is one of an organic silicon defoaming agent, a polyether defoaming agent and a non-silicon defoaming agent.
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| US20210310111A1 (en) * | 2020-04-02 | 2021-10-07 | Jiangxi Advanced Copper Industry Research Inst | Process for Producing Tinned Copper Wires |
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| CN102311857A (en) * | 2011-04-26 | 2012-01-11 | 东莞市安美润滑科技有限公司 | Copper wire high-speed fine wire drawing and superfine wire drawing lubricating liquid and preparation method and application method thereof |
| CN106833857A (en) * | 2016-12-29 | 2017-06-13 | 天恒达电工科技股份有限公司 | A kind of environmentally friendly fine copper cash wire drawing liquid and preparation method thereof |
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Denomination of invention: A production process for tin plated copper stranded wire to reduce wire breakage rate Granted publication date: 20230922 Pledgee: Wuxi Xishan sub branch of Bank of China Ltd. Pledgor: WUXI MING XING PRECISE WIREROD Co.,Ltd. Registration number: Y2024980008829 |