CN108747231A - A kind of production technology of lug copper strips - Google Patents
A kind of production technology of lug copper strips Download PDFInfo
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- CN108747231A CN108747231A CN201811057605.9A CN201811057605A CN108747231A CN 108747231 A CN108747231 A CN 108747231A CN 201811057605 A CN201811057605 A CN 201811057605A CN 108747231 A CN108747231 A CN 108747231A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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Abstract
The invention discloses a kind of production technologies of lug copper strips, belong to non-ferrous metal copper rolling and technical field of heat treatment field.The present invention includes the following steps：（1）Melting cast →（2）Hot rolling →（3）Milling Process →（4）Roughing →（5）Trimming →（6）Primary annealing →（7）Primary cleaning →（8）In roll →（9）Loose winding →（10）Double annealing →（11）Secondary cleaning →（12）Finish rolling →（13）The cleaning of air cushion furnace annealing →（14）Stretch-bending straightening →（15）Cutting is delivered.The present invention is used to improve the electric conductivity of lug copper strips, improves surface smoothness.
Description
Technical field
The present invention relates to non-ferrous metal copper rolling and technical field of heat treatment, more specifically to a kind of lug copper strips
Cold rolling heat treatment process.
Background technology
Three directions of our times new energy battery industry development, first, environmentally protective battery is grown rapidly, including lithium
Ion accumulator, Ni-H cell etc.；Second is that one-shot battery is converted to accumulator, this meets the strategy of sustainable development；Third, battery
Further develop to small, light, thin direction.In the chargeable battery of commercialization, lithium ion battery is due to energy density per unit volume and quality
It is higher than energy, it can fill and pollution-free, have three big features of present battery industrial development, therefore in the world in most countries
There is faster growth, China is also in the technical research of Efforts To Develop lithium battery.
Lug is a kind of raw material of lithium ion polymer battery product.Battery divides positive and negative anodes, lug to be exactly from battery core
The metallic conductor that positive and negative anodes are extracted, the ear of battery positive and negative polarities is the contact when carrying out charge and discharge for popular saying
Point.This contact point be not we have seen that battery appearance that copper sheet, but a kind of connection of inside battery.Battery
Anode uses aluminium (Al) material, cathode to use nickel (Ni) material, also copper nickel plating (Ni-Cu) material, the weight as lithium battery
Want component, material property directly affects the product quality and using effect of battery, indirect relation to electric tool, it is electronic from
The operating condition of the power-supply systems equipment such as driving, automobile, solar energy.
Lug copper-based material requires electric conductivity, surface smoothness etc. very high.The country is due to technology and dress
It is standby horizontal, can not ensure that the degree of purity of material, conductivity IACS are difficult to improve to 100% or more very well, while be limited by rolling,
Tailoring technology, the technical indicators such as surface smoothness, the flatness of material can not also ensure the quality of lug.Therefore it needs to improve existing
Some production technologies solve copper-based material key common technology problem, improve the R & D Level of China's copper-based material, realize high-quality
The production domesticization of lug copper strips.
Invention content
Technical problems to be solved by the inivention
The technical problem to be solved by the present invention is to overcome the copper-based material purity of lug in the prior art, conductivity and any surface finish
The defect not reached requirement is spent, a kind of production technology of lug copper strips is provided, the technical solution provided by the invention realizes copper
Purity reaches > 99.97%, and conducting wire rate is improved from 95%IACS to 100% or more, and surface roughness also reaches 0.15um-0.25um.
Technical solution
In order to achieve the above objectives, technical solution provided by the invention is：A kind of production technology of lug copper strips, including walk as follows
Suddenly：
（1）Melting cast：
（2）Hot rolling：
（3）Milling Process：
（4）Roughing：
（5）Trimming：
（6）Primary annealing：
（7）Primary cleaning：
（8）In roll：
（9）Loose winding：
（10）Double annealing：
（11）Secondary cleaning：
（12）Finish rolling：
（13）Air cushion furnace annealing cleans：
（14）Stretch-bending straightening：
（15）Cutting is delivered；
Wherein, step（1）Using catholyte copper as raw material, reagent is sprayed by molten bath bottom by powder spraying pot and is stirred, is made
The fully oxidized floating of molten bath impurities at bottom, after all dirt is oxidized to oxide, by skimming, operation removes clinker；Choosing
Deoxidation is carried out with special coal base reduction agent powder, cuprous oxide therein is made fully to be reduced, control copper alloy ingredient is：Cu
>99.97%, Pb≤50ppm, Fe≤50ppm, P≤30ppm；Step（8）Middle gloss level of roll Ra≤0.25um；Step（12）In
Gloss level of roll Ra≤0.15um.
As further improvement of the present invention, step（6）In, room temperature taking-up, the furnace cooling are furnace-cooled to after primary annealing
Including air-cooled and water cooling, the air-cooled water cooling temperature spot that turns is set as 280 DEG C, tapping temperature≤70 DEG C.
As further improvement of the present invention, step（10）In, room temperature taking-up, the furnace cooling are furnace-cooled to after double annealing
Including air-cooled and water cooling, the air-cooled water cooling temperature spot that turns is set as 200 DEG C, tapping temperature≤60 DEG C.
As further improvement of the present invention, step（7）In, pickling is using sulfuric acid washing, h 2 so 4 concentration
10%-12% is polished using 240 mesh sub-thread wire brush, is brushed again, and bristle material is silicon carbide, and polishing rotating speed is 600 r/min.
As further improvement of the present invention, step（11）In, pickling is using sulfuric acid washing, h 2 so 4 concentration
8%-10%；It is polished using 1500 mesh multiply wire brush, bristle material is aluminium oxide, and polishing rotating speed is 900 r/min；Use temperature for
70 DEG C -80 DEG C of water carries out hot water injection；It is passivated using liquid passivator.
As further improvement of the present invention, step（14）In, the jockey pulley totally eight, a diameter of 500mm, between roller
Maximum tension 58KN；Bending straightening is aligned using 23 roller of sixfold formula, a diameter of 16mm of straightening roll, band volume elongation control in aligning
In 0.16%-0.18%, band volume aligning speed is 120m/min.
As further improvement of the present invention, freewheel clutch is equipped between the motor and retarder for pricking side.
Advantageous effect
Using technical solution provided by the invention, compared with prior art, there is following remarkable result：
（1）A kind of production technology of lug copper strips of the present invention is sprayed refining agent by powder spraying pot during melting cast
Enter molten bath bottom and stir, makes the fully oxidized floating of molten bath impurities at bottom, after all dirt is oxidized to oxide, by taking off
Slag operation removes clinker, to remove undesired impurities.Special coal base reduction agent powder is selected to carry out deoxidation again, it is same to use
Powdered coal base reduction agent is sprayed into copper liquid, and stirred by powder spraying pot, and cuprous oxide therein is made fully to be reduced, and improves copper
Degree of purity.To realize that controlling copper alloy ingredient is：Cu>99.97%, Pb≤50ppm, Fe≤50ppm, P≤30ppm.
Nitrogen is added in powder spraying pot, nitrogen coexists with reagent, and does not react with reagent, and nitrogen is equivalent to examination
The power that agent is sprayed from powder spraying pot, when reagent sprays to molten bath bottom, nitrogen enters in copper water together, and nitrogen will not be with copper water
Reaction, but from bottom, floating comes up, and during rising on it, can float together with other gases in copper water, to disappear
Except gas present in copper water.
（2）A kind of production technology of lug copper strips of the present invention, lug copper strips have particular/special requirement, lug to surface smoothness
Copper strips subsequently needs to carry out nickel plating technology, and surface smoothness numerical value is too low, and the adhesive force of base material and nickel can decline, surface smoothness
Numerical value is excessively high, can lead to rough surface, easily causes the erosion of follow-up electrolyte, the suitable surface smoothness of product is in Ra0.15-
It is proper in 0.25 μ m.In order to reach this purpose, the roughness of roll is considered first, the surface of roll is directly and copper
Band contact, surface roughness directly affects strip surface, in step（8）In, thickness is by 1.3mm blank rollings to 0.4mm thickness
Semi-finished product copper strips when, keep gloss level of roll Ra≤0.25um, ensure copper strips version type it is straight；In step（12）In, finish rolling pair
Copper strips carries out 2 passes, is rolled down to the setting finished product copper strips of 0.2mm thickness by the semi-finished product of 0.4mm thickness, and gloss level of roll Ra≤
0.15um, it is same to ensure that copper strips version type is straight, to ensure that finished product copper strip surface roughness reaches 0.15-0.25 μm.Secondly it should protect
The stability for demonstrate,proving strip-rolling, avoids fluctuating, and freewheel clutch is equipped between the motor and retarder for pricking side, is rolled without reducing
Side roller quantity realizes edging, in the operation of rolling band spread fluctuation it is small, convenient for control.Again, the residual of band is reduced to the greatest extent
Residue stress prevents from generating stress concentration when rolling, causes local deformation, therefore carry out loose winding before double annealing, eliminate band
Internal stress, avoid being likely to occur cohesive phenomenon when annealing, be the good band tissue of subsequent processing preparation.
（3）A kind of production technology of lug copper strips of the present invention, third time annealing are that carried out in air cushion furnace online moves back
Fire cleaning, it is in the placement form that web-like is stacked to be different from band in bell furnace, and band is completely open and flat in air cushion furnace to be opened, from
And in annealing, it is ensured that each surface uniform force of band, heat transfer uniformly, the direction of heat flow that is subject to it is consistent, overcome
The shortcomings that uneven, product surface of annealing is easy adhesion, while directly being cleaned and being quickly cooled down after high annealing, it cleaned
Journey, surface are not brushed, it is ensured that do not cause defect to copper strip surface.Core ensures that copper strips product does not occur seriously viscous in annealing process
Connect, and edge without impression, touch the defects of pounding, while observing the oxidization condition that copper strips band under different tapping temperatures is rolled up；High annealing
Being quickly cooled down afterwards, farthest ensures the finish of the stability and surface of copper strips performance.
Description of the drawings
Nothing.
Specific implementation mode
To further appreciate that present disclosure, the present invention is described in detail in conjunction with the embodiments.
Embodiment 1
The present invention provides a kind of production technology of lug copper strips, by the technique, realizes that copper purity reaches > 99.97%, conductivity
It is improved from 95%IACS to 100% or more, surface roughness also reaches 0.15um-0.25um.
A kind of production technology of lug copper strips, includes the following steps：
（1）Melting cast；
（2）Hot rolling；
（3）Milling Process；
（4）Roughing；
（5）Trimming；
（6）Primary annealing；
（7）Primary cleaning；
（8）In roll；
（9）Loose winding；
（10）Double annealing；
（11）Secondary cleaning；
（12）Finish rolling；
（13）Air cushion furnace annealing cleans；
（14）Stretch-bending straightening；
（15）Cutting is delivered；
Wherein, step（1）Melting cast：Using catholyte copper as raw material, control targe copper degree of purity and impurity phosphorus content,
By stirring, dragging for slag, ingredient after the assay was approved, adjustment melting copper coolant-temperature gage is to 1180 DEG C -1200 DEG C or so, then carries out cast,
Control pulling rate and flow, enable the more uniform cooling of ingot casting, reduce the segregation emersion object that surface occurs, prevent its in crystallizer
Wall generates friction, draws trace so as to cause ingot casting surface, it is ensured that cc billet surface quality；Use carbon black and charcoal respectively to crystallization in addition
Device copper water and furnace body copper water are covered, and melt is lubricated and protect, and ensure that strand is abnormal without slag inclusion, stomata etc., obtain 260mm thickness
Ingot casting.
It needs to illustrate, due to containing the various metal impurities such as lead, tin, iron, magnesium, nickel, traditional work in raw material
What skill was unable to fully carries out oxidative slagging removal to impurity, there is certain impurity residual, impurity in the melting ingot casting caused
It is excessively high, influence the conductivity of finished product.Therefore, during melting cast, it is necessary to the degree of purity of copper is promoted, specifically,
Refining agent is sprayed into molten bath bottom by powder spraying pot and is stirred, makes the fully oxidized floating of molten bath impurities at bottom, when all dirt quilt
After being oxidized to oxide, by skimming, operation removes clinker, to remove undesired impurities.Special coal base reduction agent is selected again
Powder carries out deoxidation, equally uses powder spraying pot, and powdered coal base reduction agent is sprayed into copper liquid, and is stirred, oxidation therein is made
It is cuprous to be fully reduced, improve the degree of purity of copper.To realize that controlling copper alloy ingredient is：Cu>99.97%, Pb≤50ppm, Fe
≤ 50ppm, P≤30ppm.
It needs to illustrate, copper water itself is due to the influence of the factors such as environment introducing, and there are a small amount of gas, gases
Presence so that internal after ingot casting shaping there are apertures, and the bad phenomenon of peeling is caused in rolling.It is asked to solve this
Topic, nitrogen is added in powder spraying pot, nitrogen coexists with reagent, and does not react with reagent, and nitrogen be equivalent to reagent from
The power sprayed in powder spraying pot, when reagent sprays to molten bath bottom, nitrogen enters in copper water together, and nitrogen will not be anti-with copper water
It answers, but from bottom, floating comes up, and during rising on it, can float together with other gases in copper water, to eliminate
Gas present in copper water.
Step（2）Hot rolling：Thickness is put into for 260mm ingot castings in heating furnace and is heated so that ingot casting, which heats 5 hours, to be cast
After ingot temperature reaches 880 DEG C -920 DEG C, multi- pass rolling is carried out into two roller hot-rolling mills, hot-rolling mill specification is φ 650*650mm,
Mill speed 100m/min-120m/min, hot-rolling mill cooling are cooled down using emulsion, keep finishing temperature at 600 DEG C or more, and
Rapid quenching realizes effectively solid solution, the comprehensive performance of material can be improved.
Step（3）Milling Process：The made-up belt that hot outgoing gauge is 17.0mm is subjected to milling using milling machine to its upper and lower surface
It cuts, Milling Speed 3-5m/min fully mills oxide skin, avoids surface scale etc. dirty generating following process bad
It influences, plastic adhesive film is carried out in winding, avoid band volume surface from damaging or aoxidize, milling rear surface roughness is controlled in 1.5um
Within.
Step（4）Roughing：Made-up belt after milling carries out multi-pass roughing, unloads volume after being rolled down to 1.3mm, roughing mill specification is
φ 250/450*500mm, roughing mill use emulsion lubrication.Normally for base, surface is produced by high request for roughing workshop section, avoids beating
Mill, while focusing on the environmental sanitation situation of equipment and surrounding when production, it is purged in time, copper ash, copper is avoided to cut and fall in band
Surface；
Step（5）Trimming：Copper strips after roughing carries out trimming, cuts off band both sides defect part, trimming speed 50-60m/min.
Step（6）Primary annealing：Band volume after trimming is subjected to cover annealing, specific annealing process is：By 1.3mm copper
In volume input bell furnace, bell furnace top layer regions are placed on, annealing temperature is 460 DEG C -480 DEG C, then keeps the temperature 5 hours, makes it
It can fully recrystallize, room temperature taking-up is furnace-cooled to after heat preservation.It needs to illustrate, furnace cooling carries out in bell furnace
The combination cooling mode of air-cooled and water cooling, it is first air-cooled to water cooling, the air-cooled water cooling temperature spot that turns set 280 DEG C again after certain temperature,
Tapping temperature≤70 DEG C.
Step（7）Primary cleaning：Band volume after primary annealing uses pickling → clear water flushing → polishing → hot water punching successively
Washing → passivation →, the mode dried → wound is handled, wherein uses sulfuric acid washing, h 2 so 4 concentration 10%-12%；It adopts
It is polished with 240 mesh sub-thread wire brush, is brushed again, bristle material is silicon carbide, and polishing rotating speed is 600 r/min.
Step（8）In roll：Band volume after primary cleaning carries out multi- pass rolling, is rolled down to after thickness is 0.4mm and unloads volume, in
Milling train specification is φ 260/450*500mm, is rolled using full oil, mill speed 200-240m/min；Gloss level of roll≤
0.25um ensures that template is straight.
Step（9）Loose winding：In roll after band on coil opening machine carry out loose winding, it is therefore an objective to remove tensile stress, ensure follow-up
Zone face does not bond in annealing process.
Step（10）Double annealing：The complete volume of pine is annealed using bell-type annealing furnace, and specific annealing process is：It will be with volume
After putting into bell furnace, annealing temperature is 360 DEG C -380 DEG C, then keeps the temperature 5 hours, and room temperature taking-up is furnace-cooled to after heat preservation,
It needs to illustrate, furnace cooling is the combination cooling mode of the air-cooled and water cooling carried out in bell furnace, first air-cooled to certain
Water cooling, the air-cooled water cooling temperature spot that turns are set as 200 DEG C again after temperature, tapping temperature≤60 DEG C.
Step（11）Secondary cleaning：Band volume after double annealing uses pickling → clear water flushing → polishing → hot water punching successively
Washing → passivation →, the mode dried → wound is handled, wherein using sulfuric acid washing, h 2 so 4 concentration 8%-10%；Using
1500 mesh multiply wire brush polish, and bristle material is aluminium oxide, can quickly remove the stain of copper strip surface, will not also be to copper strips table
Face causes to damage, and polishing rotating speed is 900 r/min；Temperature is used to carry out hot water injection for 70 DEG C -80 DEG C of water；It is blunt using liquid
Agent is passivated.
Step（12）Finish rolling：Band volume after secondary cleaning is subjected to multi- pass rolling, is rolled down to after thickness is 0.2mm and unloads
Volume, finish rolling are rolled using full oil, mill speed 280-300m/min, gloss level of roll≤0.15um, and core ensures that template is flat
Directly, it is ensured that tolerance is qualified.
Step（13）Air cushion furnace annealing cleans：The band that smart outgoing gauge is 0.3mm is rolled up, and is positioned in air cushion furnace and is carried out online
Annealing cleaning, 650 DEG C -680 DEG C or so of annealing temperature, the equipment speed of service are 45m/min-55m/min, rotation speed of fan 900-
1000r/min。
Step（14）Stretch-bending straightening：Band volume after cleaning is aligned by the way of jockey pulley and bending straightening roller,
In, jockey pulley totally eight, a diameter of 500mm, maximum tension 58kN between roller；Bending straightening is aligned using 23 roller of sixfold formula, aligning
Roller diameter is 16mm, and for band volume elongation control in 0.16%-0.18%, band volume aligning speed is 120m/min in aligning.
Step（15）Cutting is delivered：Band volume after leveling is subjected to cutting delivery.
It needs to illustrate, lug copper strips has particular/special requirement, lug copper strips subsequently to need to carry out surface smoothness
Nickel plating technology, surface smoothness numerical value is too low, and the adhesive force of base material and nickel can decline, and surface smoothness numerical value is excessively high, can cause
Rough surface, easily causes the erosion of follow-up electrolyte, and the suitable surface smoothness of product compares in Ra0.15-0.25 μ ms
Properly.In order to reach this purpose, consider that the roughness of roll, the surface of roll are directly contacted with copper strips first, surface is thick
Rugosity directly affects strip surface, in step（8）In, thickness by 1.3mm blank rollings to 0.4mm thickness semi-finished product copper strips when,
Gloss level of roll Ra≤0.25um is kept, ensures that copper strips version type is straight；In step（12）In, finish rolling carries out 2 passages to copper strips and rolls
System, the setting finished product copper strips of 0.2mm thickness is rolled down to by the semi-finished product of 0.4mm thickness, and gloss level of roll Ra≤0.15um is same to ensure
Copper strips version type is straight, to ensure that finished product copper strip surface roughness reaches 0.15-0.25 μm.Next should ensure that the stabilization of strip-rolling
Property, it avoids fluctuating, freewheel clutch is equipped between the motor and retarder for pricking side, rolled without reducing edger roll quantity to realize
Side, in the operation of rolling band spread fluctuation it is small, convenient for control.Again, the residual stress for reducing band to the greatest extent, when preventing rolling
Stress concentration is generated, causes local deformation, therefore carry out loose winding before double annealing, eliminates the internal stress of band, avoid annealing
When be likely to occur cohesive phenomenon, be the good band tissue of subsequent processing preparation.
It needs to illustrate, third time annealing is the online annealing cleaning carried out in air cushion furnace, is different from bell-type
Band is in the placement form that web-like is stacked in stove, and band is completely open and flat in air cushion furnace to be opened, in annealing, it is ensured that
Each surface uniform force of band, heat transfer uniformly, the direction of heat flow that is subject to it is consistent, overcome uneven, product table of annealing
The shortcomings that face easy adhesion, while directly being cleaned and being quickly cooled down after high annealing, cleaning process, surface is not brushed, it is ensured that
Defect is not caused to copper strip surface.Core ensure annealing process in copper strips product do not occur being seriously bonded, and edge without impression, touch
The defects of pounding, while observing the oxidization condition that copper strips band is rolled up under different tapping temperatures；It is after annealing at a high temperature to be quickly cooled down, maximum journey
Degree ground ensures the finish of the stability and surface of copper strips performance.
Schematically the present invention and embodiments thereof are described above, description is not limiting.So if
Those skilled in the art are enlightened by it, without departing from the spirit of the invention, are not inventively designed
Go out frame mode similar with the technical solution and embodiment, is within the scope of protection of the invention.
Claims (7)
1. a kind of production technology of lug copper strips, it is characterised in that：Include the following steps：
（1）Melting cast：
（2）Hot rolling：
（3）Milling Process：
（4）Roughing：
（5）Trimming：
（6）Primary annealing：
（7）Primary cleaning：
（8）In roll：
（9）Loose winding：
（10）Double annealing：
（11）Secondary cleaning：
（12）Finish rolling：
（13）Air cushion furnace annealing cleans：
（14）Stretch-bending straightening：
（15）Cutting is delivered；
Wherein, step（1）Using catholyte copper as raw material, reagent is sprayed by molten bath bottom by powder spraying pot and is stirred, is made
The fully oxidized floating of molten bath impurities at bottom, after all dirt is oxidized to oxide, by skimming, operation removes clinker；Choosing
Deoxidation is carried out with special coal base reduction agent powder, cuprous oxide therein is made fully to be reduced, control copper alloy ingredient is：Cu
>99.97%, Pb≤50ppm, Fe≤50ppm, P≤30ppm；Step（8）Middle gloss level of roll Ra≤0.25um；Step（12）In
Gloss level of roll Ra≤0.15um.
2. according to a kind of production technology of lug copper strips in claim 1, it is characterised in that：Step（6）In, stove after primary annealing
It is cooled to room temperature taking-up, the furnace cooling includes air-cooled and water cooling, and the air-cooled water cooling temperature spot that turns is set as 280 DEG C, tapping temperature≤70
℃。
3. according to a kind of production technology of lug copper strips in claim 1, it is characterised in that：Step（10）In, after double annealing
It is furnace-cooled to room temperature taking-up, the furnace cooling includes air-cooled and water cooling, and the air-cooled water cooling temperature spot that turns is set as 200 DEG C, tapping temperature≤
60℃。
4. according to a kind of production technology of lug copper strips in claim 1, it is characterised in that：Step（7）In, pickling uses sulfuric acid
Pickling, h 2 so 4 concentration 10%-12% are polished using 240 mesh sub-thread wire brush, are brushed again, and bristle material is silicon carbide, and polishing turns
Speed is 600 r/min.
5. according to a kind of production technology of lug copper strips in claim 1, it is characterised in that：Step（11）In, pickling uses sulphur
Pickling, h 2 so 4 concentration 8%-10%；It is polished using 1500 mesh multiply wire brush, bristle material is aluminium oxide, polishes rotating speed
For 900 r/min；Temperature is used to carry out hot water injection for 70 DEG C -80 DEG C of water；It is passivated using liquid passivator.
6. according to a kind of production technology of lug copper strips in claim 1, it is characterised in that：Step（14）In, the jockey pulley
Totally eight, a diameter of 500mm, maximum tension 58KN between roller；Bending straightening is aligned using 23 roller of sixfold formula, and straightening roll is a diameter of
16mm, for band volume elongation control in 0.16%-0.18%, band volume aligning speed is 120m/min in aligning.
7. according to a kind of production technology of lug copper strips in claim 1, it is characterised in that：Prick side motor and retarder it
Between be equipped with freewheel clutch.
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| CN113083897A (en) * | 2021-04-07 | 2021-07-09 | 太原晋西春雷铜业有限公司 | Preparation method of high-uniformity surface of copper or copper alloy strip |
| CN113334089A (en) * | 2021-06-30 | 2021-09-03 | 兴化市兴成铜业有限公司 | Copper strips is made with shaping positioner |
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| CN111085823A (en) * | 2019-12-21 | 2020-05-01 | 宁波奇亿金属有限公司 | Machining process of automobile decoration strip |
| CN113083897A (en) * | 2021-04-07 | 2021-07-09 | 太原晋西春雷铜业有限公司 | Preparation method of high-uniformity surface of copper or copper alloy strip |
| CN113083897B (en) * | 2021-04-07 | 2022-12-27 | 太原晋西春雷铜业有限公司 | Preparation method of high-uniformity surface of copper or copper alloy strip |
| CN113334089A (en) * | 2021-06-30 | 2021-09-03 | 兴化市兴成铜业有限公司 | Copper strips is made with shaping positioner |
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Application publication date: 20181106 |