CN105499300A - Production technology of copper strip for lock - Google Patents
Production technology of copper strip for lock Download PDFInfo
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- CN105499300A CN105499300A CN201510949072.5A CN201510949072A CN105499300A CN 105499300 A CN105499300 A CN 105499300A CN 201510949072 A CN201510949072 A CN 201510949072A CN 105499300 A CN105499300 A CN 105499300A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/02—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
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Abstract
The invention discloses a production technology of a copper strip for a lock, and belongs to the technical field of copper strip processing. The production technology comprises the steps of (1) ingot casting smelting; (2) surface milling; (3) hot rolling; (4) rough rolling; (5) annealing; (6) primary cleaning; (7) finished product rolling; (8) secondary cleaning; and (9) inspection and delivery. The copper strip produced through adopting the technical scheme is good in abrasion resistance, moderate in hardness, less liable to rust and good in surface quality.
Description
Technical field
The present invention relates to a kind of copper strips processing technique field, more particularly, relate to a kind of copper strips production technology for lockset.
Background technology
Brass alloys are as the most a kind of copper alloy products, and be applied in all trades and professions, wherein modal alloy kind is H62, H65, H68 etc.Along with the progress of the national economic development and society, all kinds of brass alloys product is developed at present in lockset industry, such as the product such as theftproof lock, safety lock emerges in an endless stream, it is also more and more higher to lock core material requirements for these products, H59 brass is the brass that price is the most cheap, its intensity, hardness are high and plasticity good, still can bear pressure processing well, therefore can meet the demand of lock core material under hot.In order to reach market demands, develop Dutch metal H59 product, it is necessary for adapting to market development demand, because H59 brass thermoplasticity is general, the difficulties such as the easy dezincify of H59 brass product and stress cracking, and it is of the same trade main with the supply of the form such as bar and wire rod at present, produce less in strip Product processing colleague, but strip product can be applicable in lockset industry, and it is respond well, therefore in order to the high-quality of lockset product, the production technology that a set of H59 brass band is optimized in research is absolutely necessary.
Through retrieval, Chinese Patent Application No.: 2014103343713, the applying date: on July 15th, 2014, invention and created name is: a kind of brass band production method, and this application case comprises following operation: 1) founding operation; 2) heating, hot-rolled process; 3) milling face operation; 4) cold rolling process; 5) annealing operation; 6) blank pickling process; 7) semi-finished product and finished product rolling process; 8) semi-finished product and finished product acid-washing; 9) inspection process; 10) trimming, packaging process.This application case compared with prior art, major technique Advantages found exists: the inspection of the Needle analyzer that the diamagnetism brass band produced generally uses by Vehicles Collected from Market, simultaneously, by heating process and cold rolling process, reduce the content of iron in raw material, cobalt, nickel element, but the performance of this brass band cannot meet the demand of lock core material.
Summary of the invention
the technical problem that invention will solve
The object of the invention is to overcome the production difficulty of H59 brass band in prior art and the deficiency of the problem such as surface quality is poor, provide a kind of copper strips production technology for lockset, the copper strips wearability adopting the technical program to produce is good, hardness is moderate, not easily to get rusty and surface quality is good.
technical scheme
For achieving the above object, technical scheme provided by the invention is:
A kind of copper strips production technology for lockset of the present invention, its step is as follows:
(1) melting ingot casting;
(2) milling face;
(3) hot rolling;
(4) roughing;
(5) anneal;
(6) once clean;
(7) finished product rolling;
(8) secondary cleaning;
(9) inspection is paid.
Further, step (1) by electrolytic copper plate and zinc ingot metal weighted according to the ingredient standard of H59 brass after, according to the weight proportion of 4 tons, every furnace charge, wherein cathode copper: 2.36 tons, zinc ingot metal: 1.64 tons, first cathode copper is added after melting in power frequency cored induction heater, again zinc ingot metal is added fusing, by stirring, drag for slag, after composition inspection, the copper coolant-temperature gage of adjustment fusing is 1020 DEG C ~ 1030 DEG C, again the copper water of fusing is poured in water mold, adopt draw-casting machine to carry out cast and go out the ingot casting that thickness is 130mm, dry borax is adopted to cover copper water in cast process, adopt water cooling, casting speed is set as 210mm/min, cooling water pressure is 3bar.
Further, the ingot casting that the thickness of step (1) is 130mm by step (2) carries out upper and lower surface milling, and Milling Speed is 350mm/min, and milling amount is each 0.7mm, and milling rear surface roughness controls within 1.0Ra/um.
Further, ingot casting after step (2) milling is put into push-down heating furnace and is heated by step (3), heat 4 ~ 4.5 hours, after ingot casting temperature 780 DEG C, enter two roller hot-rolling mills and carry out multi-pass rolling, hot-rolling mill specification is φ 500*500mm, mill speed is 90m/min, and hot rolling cooling adopts emulsion cooling, and emulsion mass concentration is 0.3%, carry out online water-cooled after ingot rolling after milling to 3.7mm, then adopt five roller centreless coilers to batch discharging.
Further, the made-up belt of hot for step (3) outgoing gauge 3.7mm is carried out three passage roughing by step (4), roughing mill specification is φ 250/450*500mm, mill speed is 120m/min, adopt emulsion lubrication, quality of the emulsion concentration is 3%, and thickness is that to be rolled down to thickness be unload volume after 2.65mm or 3.47mm to the made-up belt of 3.7mm, roughing mill working roll top roll adopts crowned roll simultaneously, and convexity is 15 ~ 30um.
Further, the made-up belt that thick for step (4) outgoing gauge is 2.65mm or 3.47mm by step (5) adopts bell-type annealing furnace to carry out, and point two kinds of techniques perform:
Thickness is the annealing detailed process of 3.47mm made-up belt: dropped into by made-up belt in bell furnace, be warming up to 420 DEG C through 4.5 hours, is then incubated 5 hours, and insulation terminates rear stove and is chilled to normal temperature taking-up;
Thickness is the annealing detailed process of 2.65mm made-up belt: dropped into by made-up belt in bell furnace, be warming up to 390 DEG C through 4 hours, is then incubated 4.5 hours, and insulation terminates rear stove and is chilled to normal temperature taking-up.
Further, thickness after step (5) annealing is that 2.65mm or 3.47mm made-up belt adopts the mode of pickling → clear water flushing → polishing → oven dry → rolling to process successively by step (6), adopt sulfuric acid washing, h 2 so 4 concentration is 10%, adopt 600 order nylon bruss polishings, polishing velocity is 40m/min.
Further, step (7) step (6) is once cleaned after thickness be that the made-up belt of 2.65mm or 3.47mm carries out three passes, milling train specification is φ 180/400*500mm, mill speed 180m/min, adopt emulsion lubrication, quality of the emulsion concentration is 4%, and thickness is unload volume after the made-up belt of 2.65mm, 3.47mm is rolled down to 2.0mm, 2.5mm respectively, operation roll of mill top roll adopts crowned roll simultaneously, and convexity is 20 ~ 25um.
Further, the made-up belt that thickness after step (7) finished product rolling is 2.0mm or 2.5mm adopts the mode of pickling → clear water flushing → polishing → hot water injection → passivation → oven dry → rolling to process by step (8) successively, adopt sulfuric acid washing, h 2 so 4 concentration is 10%, adopts 1000 order nylon bruss polishings, and employing temperature is that the water of 80 DEG C carries out hot water injection, adopt BTA passivation, BTA mass concentration is 0.3%, and temperature is 70 DEG C, and passivation speed is 50m/min.
beneficial effect
Adopt technical scheme provided by the invention, compared with prior art, there is following remarkable result:
(1) a kind of copper strips production technology for lockset of the present invention, wherein, in copper strip billet roughing, and in the process of finished product rolling, adopt the mode of pressure rolling, in the operation of rolling, lower roll position maintains static, top roll adjusts at any time to meet rolling demand in the operation of rolling, working roll two ends in the operation of rolling due to top roll are subject to downward power effect and make the working roll generation in top roll bending, and make it produce certain concavity, thus cause the thin phenomenon of band thick middle and both sides, in the present invention by design top roll in working roll be crowned roll, improve in the middle of the band that brings because of roll-force and phenomenon that both sides variable thickness causes, in the middle of the band that different drafts adopts the top roll working roll of its suitable convexity to make up to cause due to the impact of roll-force and the defect that causes of both sides variable thickness, ensure that the surface smoothness of H59 copper strip billet, and the precision on its surface.
(2) a kind of copper strips production technology for lockset of the present invention; wherein; in the process of heating period of the annealing of bell furnace, holding stage and cooling stage; being filled with in right amount of hydrogen and nitrogen hybrid protection gas; effectively ensure that the heating period, holding stage copper strip billet protection gas effect under can be heated evenly; and the impact of quenching can not be subject under the effect of protection gas at cooling stage copper strip billet; triphasic be combineding with each other ensure that the homogenising of copper strip billet grain size, thus ensure that the mechanical performance of copper strip billet.In this annealing process, protect gas to adopt be filled with while the mode of discharging simultaneously; ensure that the requirement that copper strip billet is annealed on the one hand; a large amount of dusts of the carbonizations gradually in heating process such as dirty, greasy dirt, the impurity on copper strip billet surface will be made on the other hand to carry discharge, further increase copper strip billet annealing quality.
(3) a kind of copper strips production technology for lockset of the present invention, wherein, in cast process, casting speed is crossed and can be caused that production efficiency is low, energy consumption is large slowly; When casting speed is very fast, then inside ingot can be caused to organize not tight, the anomaly such as pore, crackle can be produced; Equally, when cold water water pressure is excessive, the problem such as shrinkage cavity, cold lattice can be caused, when the too small meeting of cold water water pressure causes peeling, slag inclusion etc. abnormal, middle casting speed and the good fit of cooling water ensure that ingot quality in the present invention, simultaneously for the performance requirement of follow-up H59 copper strips is laid a good foundation.
Detailed description of the invention
For understanding content of the present invention further, the present invention is described in detail in conjunction with the embodiments.
embodiment 1
A kind of copper strips production technology for lockset of the present embodiment, the production process of its specifically H59 brass band, its step is as follows:
(1) melting ingot casting; (2) milling face; (3) hot rolling; (4) roughing; (5) anneal; (6) once clean; (7) finished product rolling; (8) secondary cleaning; (9) inspection is paid.
Step (1) by electrolytic copper plate and zinc ingot metal weighted according to the ingredient standard of H59 brass after, according to the weight proportion of 4 tons, every furnace charge, wherein cathode copper: 2.36 tons, zinc ingot metal: 1.64 tons, different according to both fusing points, first cathode copper is added after melting in power frequency cored induction heater, again zinc ingot metal is added fusing, by stirring, drag for slag, after composition inspection, the copper coolant-temperature gage of adjustment fusing is 1020 DEG C ~ 1030 DEG C, again the copper water of fusing is poured in water mold, adopt draw-casting machine to carry out cast and go out the ingot casting that thickness is 130mm, dry borax is adopted to cover copper water in cast process, ensure cc billet surface quality, without slag inclusion, pores etc. are abnormal adopts water cooling, casting speed is set as 210mm/min, cooling water pressure is 3bar, casting speed and cooling water in the process good fit is the place of the key ensureing ingot quality, if casting speed tunes up, cooling water pressure follows rising, but casting speed is crossed and production efficiency can be caused slowly low in cast process, energy consumption is large, when casting speed is very fast, then inside ingot can be caused to organize not tight, the anomaly such as pore, crackle can be produced, equally, when cold water water pressure is excessive, the problem such as shrinkage cavity, cold lattice can be caused, when the too small meeting of cold water water pressure causes peeling, slag inclusion etc. abnormal.
The ingot casting that the thickness of step (1) is 130mm by step (2) carries out upper and lower surface milling, and Milling Speed is 350mm/min, and milling amount is each 0.7mm, and milling rear surface roughness controls within 1.0Ra/um.
Ingot casting after step (2) milling is put into push-down heating furnace and is heated by step (3), heat 4 ~ 4.5 hours, after ingot casting temperature 780 DEG C, enter two roller hot-rolling mills and carry out multi-pass rolling, hot-rolling mill specification is φ 500*500mm, and mill speed is 90m/min, hot rolling cooling adopts emulsion cooling, emulsion mass concentration is 0.3%, carries out online water-cooled after the ingot rolling after milling to 3.7mm, then adopts five roller centreless coilers to batch discharging.
The made-up belt of hot for step (3) outgoing gauge 3.7mm is carried out three passage roughing by step (4), roughing mill specification is φ 250/450*500mm, mill speed is 120m/min, adopt emulsion lubrication, quality of the emulsion concentration is 3%, thickness is that to be rolled down to thickness be unload volume after 2.65mm or 3.47mm to the made-up belt of 3.7mm, roughing mill working roll top roll adopts crowned roll simultaneously, convexity is 15 ~ 30um, the copper strip billet being 3.7mm when thickness in the present embodiment is rolled down to thickness when being 2.65mm, adopts the top roll of roughing mill working roll to be convexity to be the crowned roll of 30um, when to be rolled down to thickness be 3.47mm to the copper strip billet that thickness is 3.7mm, adopt the top roll of roughing mill working roll to be convexity to be the crowned roll of 15um, the mode adopting pressure rolling when thickness is 2.65mm or 3.47mm is rolled down at the made-up belt that thickness is 3.7mm, in the operation of rolling, lower roll position maintains static, top roll adjusts at any time to meet rolling thickness and template demand in the operation of rolling, working roll two ends in the operation of rolling due to top roll are subject to downward power effect and make the working roll generation in top roll bending, and make it produce certain concavity, thus cause the thin phenomenon of band thick middle and both sides, thus technical staff designs crowned roll in order to the phenomenon improving in the middle of the band that brings because of roll-force and both sides variable thickness causes according to knowhow, through a large amount of practice processes, the H59 copper strip billet that to learn when thickness be 3.7mm is rolled down to thickness when being 2.65mm, adopt the top roll of roughing mill working roll to be convexity to be the crowned roll of 30um, when to be rolled down to thickness be 3.47mm to the H59 copper strip billet that thickness is 3.7mm, adopt the top roll of roughing mill working roll to be convexity to be the crowned roll of 15um, in the middle of the band that different drafts adopts the top roll working roll of its suitable convexity to make up to cause due to the impact of roll-force and the defect that causes of both sides variable thickness, ensure that the surface smoothness of H59 copper strip billet, and the precision on its surface.
The made-up belt that thick for step (4) outgoing gauge is 2.65mm or 3.47mm by step (5) adopts bell-type annealing furnace to carry out, and point two kinds of techniques perform:
Thickness is the annealing detailed process of 3.47mm made-up belt: dropped into by made-up belt in bell furnace, be warming up to 420 DEG C through 4.5 hours, is then incubated 5 hours, and insulation terminates rear stove and is chilled to normal temperature taking-up;
Thickness is the annealing detailed process of 2.65mm made-up belt: dropped into by made-up belt in bell furnace, be warming up to 390 DEG C through 4 hours, is then incubated 4.5 hours, and insulation terminates rear stove and is chilled to normal temperature taking-up.
Experience heating, insulation, cooling three processes when copper strip billet carries out bell-type annealing furnace annealing:
First once vacuumized process in bell furnace before the heating period of bell furnace, then to being filled with substitute in it, this substitute is nitrogen; Stopping inflation when pressure in bell furnace reaches malleation 108 ~ 110Pa, is specifically malleation 110Pa in the present embodiment; It is necessary for now belonging to slight positive pressure state in bell furnace, if too high its Inner cover that causes of pressure is seriously stressed in bell furnace, is unfavorable for the Long-Time Service that its Inner covers, if pressure is lower than normal pressure, entering of extraneous air can be caused, be mixed with air during its Inner is covered, affect subsequent anneal quality.
The heating period of bell furnace, protection gas all refers to the mist of hydrogen and nitrogen, wherein the percent by volume of hydrogen is 75%, the percent by volume of nitrogen is 25%, protect gas during heating under fan action, in Inner cover, form the shielding gas flow of steady flow, be looped around the surrounding of copper strip billet, protect gas to serve as heat transfer medium and transfer heat to parcel copper strip billet therein simultaneously, thus copper strip billet is heated anneal; In the protection gas adopted in the present embodiment, hydrogen content is higher, hydrogen density is little, dynamic viscosity is little, reproducibility is strong, fast in the drive current downflow of blower fan, heat conduction is good, it is more even that this indirect heating manner makes copper strip billet be heated, and thermal histories is continual and steady, the Annealing Property being conducive to copper strip billet is stablized; Thickness is that 3.47mm made-up belt heated through 4.5 hours, makes to be warming up to 420 DEG C in stove; Thickness is that 2.65mm made-up belt heated through 4 hours, makes to be warming up to 390 DEG C in stove; The heating period of bell furnace continues to be filled with protection gas.
The Annealing Property of the mode that is filled with on copper strip billet of gas is protected to have remarkable impact in the heating period of bell furnace, whether entering of protection gas be even, the whether sufficient thermal histories all directly affecting copper strip billet of inlet, the uneven meeting of protection gas causes copper strip billet to be heated inequality, thus make copper strip billet tissue odds, there is difference in each several part hardness, unstable properties; The inadequate copper strip billet that can cause again of protection gas is heated slowly, and extending heating time, reduces production efficiency, and technical staff, by theory analysis and lot of experiment validation, finds that at flow be 8 ~ 10Nm
3during/h, annealing effect is best.
The holding stage of bell furnace, thickness is that 3.47mm made-up belt is incubated 5 hours in 420 DEG C of atmosphere, and thickness is that 2.65mm made-up belt is incubated 4.5 hours in 390 DEG C of atmosphere, and still continue to be filled with protection gas at whole holding stage, this stage shielding gas flow amount controls at 5 ~ 6Nm
3/ h is best, both ensure that the quality requirement of made-up belt, again reduces the demand of protection gas.
The cooling stage of bell furnace; adopt the cold mode of stove that the is air-cooled and combination of water-cooled shape; this stage still continues to be filled with protection gas, now protects gas to serve as cooling medium, copper strip billet is cooled gradually; the cooling of copper strip billet can not experience abrupt temperature drop process; the phenomenon that plasticity and toughness reduce appears that hardness increases, in the too fast copper strip billet that may cause on the contrary of cooling velocity, and technical staff is the cooling effect ensureing copper strip billet; shielding gas flow amount adjusted further, air-cooled stage shielding gas flow amount is 4-5Nm
3/ h, water cooling stage shielding gas flow amount is 2-3Nm
3/ h.
In the present embodiment; in the process of heating period of the annealing of bell furnace, holding stage and cooling stage; being filled with in right amount of hydrogen and nitrogen hybrid protection gas; effectively ensure that the heating period, holding stage copper strip billet protection gas effect under can be heated evenly; and the quenching impact of cooling medium can not be subject under the effect of protection gas at cooling stage copper strip billet; triphasic be combineding with each other ensure that the homogenising of copper strip billet grain size, thus ensure that the mechanical performance of copper strip billet.In this annealing process, protect gas to adopt be filled with while the mode of discharging simultaneously; ensure that the requirement that copper strip billet is annealed on the one hand; a large amount of dusts of the carbonizations gradually in heating process such as dirty, greasy dirt, the impurity on copper strip billet surface will be made on the other hand to carry discharge, further increase copper strip billet annealing quality.
Thickness after step (5) annealing is that 2.65mm or 3.47mm made-up belt adopts the mode of pickling → clear water flushing → polishing → oven dry → rolling to process successively by step (6), adopt sulfuric acid washing, h 2 so 4 concentration is 10%, and adopt 600 order nylon bruss polishings, polishing velocity is 40m/min.
Step (7) step (6) is once cleaned after thickness be that the made-up belt of 2.65mm or 3.47mm carries out three passes, milling train specification is φ 180/400*500mm, mill speed 180m/min, adopt emulsion lubrication, quality of the emulsion concentration is 4%, thickness is unload volume after the made-up belt of 2.65mm, 3.47mm is rolled down to 2.0mm, 2.5mm respectively, and operation roll of mill top roll adopts crowned roll simultaneously, and convexity is 20 ~ 25um.The made-up belt being 2.65mm when thickness in the present embodiment is rolled down to thickness when being 2.0mm, and operation roll of mill top roll adopts crowned roll, and convexity is 20um; When to be rolled down to thickness be 2.5mm to the made-up belt that thickness is 3.47mm, operation roll of mill top roll adopts crowned roll, convexity is 25um, in the middle of the band that different drafts adopts the top roll working roll of its suitable convexity to make up to cause due to the impact of roll-force and the defect that causes of both sides variable thickness, ensure that the surface smoothness of mill product H59 copper strip billet, and the precision on its surface.
The made-up belt that thickness after step (7) finished product rolling is 2.0mm or 2.5mm adopts the mode of pickling → clear water flushing → polishing → hot water injection → passivation → oven dry → rolling to process by step (8) successively, adopt sulfuric acid washing, h 2 so 4 concentration is 10%, adopt 1000 order nylon bruss polishings, employing temperature is that the water of 80 DEG C carries out hot water injection, and adopt BTA passivation, BTA mass concentration is 0.3%, temperature is 70 DEG C, and passivation speed is 50m/min.
After step (5) annealing and step (7) finished product rolling, all adopt sulfuric acid to carry out pickling in this example, adopt BTA to carry out passivation, the oxide layer that copper strip roll surface is formed is removed in pickling; Passivation Treatment is carried out to not copper strip roll surface, gives copper strip roll corrosion resistance of surface.In step (3) hot rolling, step (4) roughing, step (7) finished product rolling, the rolling mill roll of each process all adopts variable concentrations emulsion to carry out cooling or lubricating, this process effectively ensure that the surface quality of copper strip roll, improves the operating efficiency of milling train simultaneously.
For the copper strips production technology of lockset in the present embodiment, each step is all linked with one another, progressive, complement each other and the reasonable setting of each process parameter, just make the thickness 2.0mm that produces or 2.5mmH59 copper strips have good wearability, hardness moderate, not easily to get rusty and surface quality is good, thus ensure that the performance requirement of lockset lock core.
Claims (9)
1. for a copper strips production technology for lockset, it is characterized in that, its step is as follows:
(1) melting ingot casting;
(2) milling face;
(3) hot rolling;
(4) roughing;
(5) anneal;
(6) once clean;
(7) finished product rolling;
(8) secondary cleaning;
(9) inspection is paid.
2. a kind of copper strips production technology for lockset according to claim 1, it is characterized in that, step (1) by electrolytic copper plate and zinc ingot metal weighted according to the ingredient standard of H59 brass after, according to the weight proportion of 4 tons, every furnace charge, wherein cathode copper: 2.36 tons, zinc ingot metal: 1.64 tons, first cathode copper is added after melting in power frequency cored induction heater, again zinc ingot metal is added fusing, by stirring, drag for slag, after composition inspection, the copper coolant-temperature gage of adjustment fusing is 1020 DEG C ~ 1030 DEG C, again the copper water of fusing is poured in water mold, adopt draw-casting machine to carry out cast and go out the ingot casting that thickness is 130mm, dry borax is adopted to cover copper water in cast process, adopt water cooling, casting speed is set as 210mm/min, cooling water pressure is 3bar.
3. a kind of copper strips production technology for lockset according to claim 2, it is characterized in that, the ingot casting that step (1) thickness is 130mm by step (2) carries out upper and lower surface milling, Milling Speed is 350mm/min, milling amount is each 0.7mm, and milling rear surface roughness controls within 1.0Ra/um.
4. a kind of copper strips production technology for lockset according to claim 3, it is characterized in that, ingot casting after step (2) milling is put into push-down heating furnace and is heated by step (3), heat 4 ~ 4.5 hours, after ingot casting temperature 780 DEG C, enter two roller hot-rolling mills and carry out multi-pass rolling, hot-rolling mill specification is φ 500*500mm, mill speed is 90m/min, hot rolling cooling adopts emulsion cooling, emulsion mass concentration is 0.3%, carries out online water-cooled by after the ingot rolling after milling to 3.7mm, then adopts five roller centreless coilers to batch discharging.
5. a kind of copper strips production technology for lockset according to claim 4, it is characterized in that, the made-up belt of hot for step (3) outgoing gauge 3.7mm is carried out three passage roughing by step (4), roughing mill specification is φ 250/450*500mm, and mill speed is 120m/min, adopts emulsion lubrication, quality of the emulsion concentration is 3%, thickness is that to be rolled down to thickness be unload volume after 2.65mm or 3.47mm to the made-up belt of 3.7mm, and roughing mill working roll top roll adopts crowned roll simultaneously, and convexity is 15 ~ 30um.
6. a kind of copper strips production technology for lockset according to claim 5, is characterized in that, the made-up belt that thick for step (4) outgoing gauge is 2.65mm or 3.47mm by step (5) adopts bell-type annealing furnace to carry out, and point two kinds of techniques perform:
Thickness is the annealing detailed process of 3.47mm made-up belt: dropped into by made-up belt in bell furnace, be warming up to 420 DEG C through 4.5 hours, is then incubated 5 hours, and insulation terminates rear stove and is chilled to normal temperature taking-up;
Thickness is the annealing detailed process of 2.65mm made-up belt: dropped into by made-up belt in bell furnace, be warming up to 390 DEG C through 4 hours, is then incubated 4.5 hours, and insulation terminates rear stove and is chilled to normal temperature taking-up.
7. a kind of copper strips production technology for lockset according to claim 6, it is characterized in that, thickness after step (5) annealing is that 2.65mm or 3.47mm made-up belt adopts the mode of pickling → clear water flushing → polishing → oven dry → rolling to process successively by step (6), adopt sulfuric acid washing, h 2 so 4 concentration is 10%, adopt 600 order nylon bruss polishings, polishing velocity is 40m/min.
8. a kind of copper strips production technology for lockset according to claim 7, it is characterized in that, step (7) step (6) is once cleaned after thickness be that the made-up belt of 2.65mm or 3.47mm carries out three passes, milling train specification is φ 180/400*500mm, mill speed 180m/min, adopt emulsion lubrication, quality of the emulsion concentration is 4%, thickness is unload volume after the made-up belt of 2.65mm, 3.47mm is rolled down to 2.0mm, 2.5mm respectively, operation roll of mill top roll adopts crowned roll simultaneously, and convexity is 20 ~ 25um.
9. a kind of copper strips production technology for lockset according to claim 8, it is characterized in that, the made-up belt that thickness after step (7) finished product rolling is 2.0mm or 2.5mm adopts the mode of pickling → clear water flushing → polishing → hot water injection → passivation → oven dry → rolling to process by step (8) successively, adopt sulfuric acid washing, h 2 so 4 concentration is 10%, adopt 1000 order nylon bruss polishings, employing temperature is that the water of 80 DEG C carries out hot water injection, adopt BTA passivation, BTA mass concentration is 0.3%, temperature is 70 DEG C, and passivation speed is 50m/min.
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| CN108057999A (en) * | 2017-12-29 | 2018-05-22 | 安徽楚江科技新材料股份有限公司 | A kind of double strong copper strips production technologies for automotive connector |
| CN108747231A (en) * | 2018-09-11 | 2018-11-06 | 安徽楚江科技新材料股份有限公司 | A kind of production technology of lug copper strips |
| CN109434378A (en) * | 2018-10-31 | 2019-03-08 | 温州铜丰铜业有限公司 | A kind of copper strips production technology |
| CN113088653A (en) * | 2021-04-02 | 2021-07-09 | 安徽楚江科技新材料股份有限公司 | Production process of large-size automobile parts |
| CN114406607A (en) * | 2021-12-21 | 2022-04-29 | 江西铜业集团铜板带有限公司 | Preparation method of ultrathin red copper thin strip and ultrathin red copper thin strip |
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| CN107971711A (en) * | 2017-12-29 | 2018-05-01 | 安徽楚江科技新材料股份有限公司 | A kind of mirror copper band production technology for button fabric product |
| CN108057999A (en) * | 2017-12-29 | 2018-05-22 | 安徽楚江科技新材料股份有限公司 | A kind of double strong copper strips production technologies for automotive connector |
| CN108747231A (en) * | 2018-09-11 | 2018-11-06 | 安徽楚江科技新材料股份有限公司 | A kind of production technology of lug copper strips |
| CN109434378A (en) * | 2018-10-31 | 2019-03-08 | 温州铜丰铜业有限公司 | A kind of copper strips production technology |
| CN113088653A (en) * | 2021-04-02 | 2021-07-09 | 安徽楚江科技新材料股份有限公司 | Production process of large-size automobile parts |
| CN114406607A (en) * | 2021-12-21 | 2022-04-29 | 江西铜业集团铜板带有限公司 | Preparation method of ultrathin red copper thin strip and ultrathin red copper thin strip |
| CN114406607B (en) * | 2021-12-21 | 2025-10-17 | 江西铜业集团铜板带有限公司 | Preparation method of ultrathin red copper thin strip and ultrathin red copper thin strip |
| CN115228932A (en) * | 2022-08-17 | 2022-10-25 | 安徽众源新材料股份有限公司 | Ultra-hard copper strip type treatment process |
| WO2025218328A1 (en) * | 2024-04-18 | 2025-10-23 | 太原晋西春雷铜业有限公司 | Anti-adhesion treatment method suitable for bell-type annealing of copper alloy strips |
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