CN116372517A - Copper strip cleaning and tape connecting structure and process for connecting piece - Google Patents
Copper strip cleaning and tape connecting structure and process for connecting piece Download PDFInfo
- Publication number
- CN116372517A CN116372517A CN202310369358.0A CN202310369358A CN116372517A CN 116372517 A CN116372517 A CN 116372517A CN 202310369358 A CN202310369358 A CN 202310369358A CN 116372517 A CN116372517 A CN 116372517A
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- Prior art keywords
- copper strip
- tail
- head
- thickness
- copper
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 182
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 182
- 239000010949 copper Substances 0.000 title claims abstract description 182
- 238000004140 cleaning Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000003466 welding Methods 0.000 claims abstract description 14
- 238000000137 annealing Methods 0.000 claims description 12
- 238000005096 rolling process Methods 0.000 claims description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 238000003801 milling Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000005520 cutting process Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000002161 passivation Methods 0.000 description 10
- 239000007788 liquid Substances 0.000 description 5
- 239000002699 waste material Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
- C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
Abstract
The invention aims to disclose a copper strip cleaning and tape splicing structure and a tape splicing process for a connecting piece, wherein the copper strip cleaning and tape splicing structure comprises a first copper strip and a second copper strip; the first copper strip comprises a first body part, a first head part and a first tail part, wherein the first head part and the first tail part are arranged at two ends of the first body part, and the second copper strip comprises a second body part, and a second head part and a second tail part, which are arranged at two ends of the second body part; the thickness of the first tail portion and the first head portion is smaller than that of the first body portion; the thickness of the second tail part and the second head part is smaller than that of the second body part; overlap joint and pressfitting or welding first afterbody and second head, beneficial effect: the head and the tail of the copper strip are thinned to 3mm-6mm, so that the thickness of the lap joint is smaller than or equal to 12mm, the connection of the ultra-thick copper strip is realized, the continuous cleaning of the ultra-thick copper strip is realized, the production efficiency of the ultra-thick copper strip is ensured, the production cost is reduced, and a foundation is provided for cutting the ultra-thick copper strip connecting piece for quick charging.
Description
Technical Field
The invention relates to the technical field of processing of ultra-thick copper strips for new energy, in particular to a copper strip cleaning and strip connecting structure and a strip connecting process for a connecting piece.
Background
With the rapid development and popularization of new energy vehicles, the continuous voyage and the charging rate of the vehicle battery are increasingly emphasized. In terms of charging rate, the requirement on the conductor of the charging connecting piece is higher and higher, the thicker copper bar is mainly adopted for the charging connecting piece at present, the larger the charging rate which can be borne by the thicker copper bar is, at present, continuous cleaning and passivation can be realized by preparing the copper strip with the conventional thickness of 4mm-6mm, but continuous cleaning can not be realized by the ultra-thick copper strip with the thickness of more than 6mm due to process limitation, so that the copper bar with the thickness of more than 6mm can only be cleaned in a block cleaning mode at present, namely, the copper bar is cleaned one by one, the cleaning efficiency is low, the cost of the ultra-thick copper bar is high, and the ultra-thick copper bar cannot be suitable for the market. The copper bar is formed by cutting copper strips with a certain thickness, in the process of preparing the copper strips, the surfaces of the rolled copper strips need to be cleaned and passivated, in order to realize continuous cleaning and passivation, the tail part of one roll of copper strips needs to be connected with the head part of the other roll of copper strips after being completely unfolded and cleaned so as to continuously clean and passivate, when two rolls of copper strips with the thickness of 6mm are connected, the thickness of the joint reaches 12mm, and the thickness limit of the joint is reached, so that the current copper strips with the thickness of 6mm reach the process limit, and the problem that the thickness limit exists is that the joint cannot be realized for two adjacent rolls of copper strips with the thickness of more than 6mm, and further the continuous cleaning of copper strip coiled materials with the thickness of more than 6mm cannot be realized, so that the copper strips with the thickness of more than 6mm are low in processing efficiency and cannot be suitable for the market in the aspect of cost.
In view of the foregoing, there is a need to develop a copper strip cleaning tape splicing structure and tape splicing process for connectors that overcomes the above-mentioned drawbacks.
Disclosure of Invention
The invention aims to disclose a copper strip cleaning and connecting structure and a copper strip connecting process for a connecting piece, wherein the two ends of an ultra-thick copper strip are thinned, and then the head and the tail of two adjacent copper strips are lapped, so that the thickness of the lapped part is less than or equal to 12mm, the ultra-thick copper strips are connected, and the continuous cleaning of the ultra-thick copper strips is realized.
The first invention aims to provide a copper strip cleaning and connecting strip structure for a connecting piece.
The second invention aims to provide a copper strip cleaning and connecting process for connecting pieces.
In order to achieve the first object, the present invention provides a copper strip cleaning and connecting strip structure for a connecting piece, comprising a first copper strip and a second copper strip;
the first copper strip comprises a first body part, a first head part and a first tail part, wherein the first head part and the first tail part are arranged at two ends of the first body part, and the second copper strip comprises a second body part, and a second head part and a second tail part, which are arranged at two ends of the second body part;
the thickness of the first tail portion and the first head portion is smaller than that of the first body portion;
the thickness of the second tail portion and the second head portion is smaller than that of the second body portion;
and overlapping and pressing or welding the first tail part and the second head part.
Preferably, the first copper strip and the second copper strip are coiled materials.
Preferably, the thickness of the first body part and the second body part is 7mm-10mm;
the thickness of the first head part and the thickness of the first tail part are 3mm-6mm;
the thickness of the second head part and the second tail part is 3mm-6mm.
Preferably, the lengths of the first head part and the first tail part are 1m-30m, and the lengths of the second head part and the second tail part are 1m-30m.
Preferably, the welding is argon arc welding.
Based on the same inventive principle, to achieve the second invention object, the copper strip cleaning and strip connecting process for the connecting piece comprises the following steps:
rolling the copper strip blank to a copper strip with the thickness of 7mm-10mm;
thinning the head and tail of the copper strip to 3mm-6mm;
overlapping the tail part and the head part of the adjacent copper strips, and pressing or welding to obtain continuous copper strips;
and cleaning and passivating the continuous copper strip.
Preferably, the thickness of the copper strip blank is 12mm-20mm.
Preferably, the copper strip blank is a coil.
Preferably, the method further comprises the following steps:
milling the surface of the copper strip blank;
the copper strips are trimmed in a head-tail and plate shape;
and carrying out cover annealing on the copper strip.
Preferably, the cover annealing temperature is 380 ℃, the temperature is raised for 4 hours, and the heat is preserved for 6 hours;
after the hood-type annealing is completed, the temperature is cooled to below 280 ℃ by air and then cooled to room temperature by water.
Compared with the prior art, the invention has the beneficial effects that:
when the traditional mode of overlapping adjacent copper strips is used for jointing, the thickness of the copper strips with the thickness of 7mm-10mm reaches 14mm-20mm, the thickness exceeds the limit of the existing equipment and process, and the 7mm-10mm cannot be subjected to overlap joint.
Drawings
Fig. 1 is a schematic view of a conventional adjacent copper strip splicing structure according to the present invention.
Fig. 2 is a schematic view of the structure of the copper strip cleaning tape for the connector of the present invention.
Fig. 3 is a flow chart of the process for cleaning and splicing the copper strip for the connecting piece.
1, a first copper strip; 11. a first body portion; 12. a first head; 13. a first tail; 2. a second copper strap; 21. a second body portion; 22. a second head; 23. and a second tail.
Detailed Description
The present invention will be described in detail below with reference to the embodiments shown in the drawings, but it should be understood that the embodiments are not limited to the present invention, and functional, method, or structural equivalents and alternatives according to the embodiments are within the scope of protection of the present invention by those skilled in the art.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Example 1
Referring to fig. 2, the present embodiment provides a copper strip cleaning tape splicing structure for a connector, comprising a first copper strip 1 and a second copper strip 2; the first copper strip 1 comprises a first body 11, a first head 12 and a first tail 13 arranged at two ends of the first body 11, and the second copper strip 2 comprises a second body 21, a second head 22 and a second tail 23 arranged at two ends of the second body 21; the thickness of the first tail 13 and the first head 12 is smaller than the thickness of the first body 11; the thickness of the second tail portion 23 and the second head portion 22 is smaller than that of the second body 21; the first tail 13 and the second head 22 are overlapped and pressed or welded, and the welding is argon arc welding.
Specifically, in the prior art, the first copper strip 1 and the first copper strip 2 are directly lapped together in a mode shown in fig. 1, if the lap joint is carried out by using copper strips with the thickness of 7mm-10mm, the minimum thickness of the lap joint is 14mm, which exceeds the thickness limit of the existing pressing or welding equipment, and the continuous cleaning passivation of the ultra-thick copper strips is not realized, so that the continuous cleaning passivation of the ultra-thick copper strips is influenced; for this reason, in order to achieve the lapping of the ultra-thick copper strip and to perform continuous cleaning by adopting the existing equipment, the lapping mode of this embodiment is shown in fig. 2, the initial state of the first copper strip 1 and the second copper strip 2 is coiled materials, and the thicknesses of the first body portion 11 and the second body portion 21 are 7mm-10mm, preferably 8mm; the thickness of the first head 12 and the first tail 13 is 3mm-6mm, preferably 4mm; the thickness of the second head portion 22 and the second tail portion 23 is 3mm-6mm, preferably 4mm; when the first copper strip 1 is unwound to the first tail 13, the unwinding is stopped, the second copper strip 2 is unwound and the second head 22 is unfolded, the second head 22 and the first tail 13 are lapped, the thicknesses of the second head 22 and the first tail 13 are reduced to be not more than 6mm, the maximum thickness of the second head 22 and the first tail 13 after lapping is 12mm, the lapping thickness of the existing equipment can still be met, after the two ends of the copper strip are thinned and lapped and connected, the ultra-thick copper strip can also adapt to the existing equipment for continuous cleaning, specifically, the ultra-thick copper strip with the thickness of 7mm-10mm, preferably 8mm, can be continuously cleaned and passivated, the ultra-thick copper strip with the thickness of 7mm-10mm can be prepared into the ultra-thick copper strip with the thickness of 7mm-10mm after being cut, and can be used as a connecting piece for quick charging of a vehicle battery, and the ultra-thick copper strip can bear a faster charging rate.
As a preferred embodiment, the lengths of the first head 12 and the first tail 13 are 1m-30m, and the lengths of the second head 22 and the second tail 23 are 1m-30m; when the lengths of the first head 12 and the first tail 13 are 1m-3m, and the lengths of the second head 22 and the second tail 23 are 1m-3m, the head and the tail of the lengths are enough to be connected in lap joint; in the continuous cleaning process of the copper strips, the first copper strip 1 and the second copper strip 2 need to be stopped when being connected, part of the length of the first copper strip 1 in front is soaked in cleaning liquid, the surface of the first copper strip 1 is corroded in the soaking process to cause defects, the first copper strip 1 soaked in the cleaning liquid is treated as waste, when the length of the first tail 13 is 10m-30m, and the length of the second head 22 is 1m-3m, namely, the length of the second head 22 is smaller than the length of the first tail 13, and the length of the first tail 13 is just soaked in the cleaning liquid, so that extra waste is not caused even if the first tail 13 becomes waste.
According to the embodiment, the head and the tail of the copper strip are thinned to 3mm-6mm, so that the thickness of the lap joint is smaller than or equal to 12mm, the connection of the ultra-thick copper strip is realized, the continuous cleaning of the ultra-thick copper strip is realized, the production efficiency of the ultra-thick copper strip is ensured, the production cost is reduced, a foundation is provided for cutting the ultra-thick copper strip connecting piece for quick charging, the problem that the existing ultra-thick copper strip can be cleaned only one by one is solved, and the production cost of the ultra-thick copper strip is greatly reduced.
Example two
Referring to fig. 3, the embodiment provides a copper strip cleaning and splicing process for a connecting piece, which comprises the following steps:
step S1: rolling the copper strip blank to a copper strip with the thickness of 7mm-10mm; specifically, the thickness of the copper strip blank is 12mm-20mm, preferably 12mm or 16mm, the rolled copper strip blank is cold rolled to a copper strip with the thickness of 7mm-10mm, preferably 8mm, and before rolling, the copper strip blank is subjected to surface milling, namely the upper surface, the lower surface and the side surfaces of the copper strip blank are milled, and surface defects are eliminated; after rolling is completed, the first copper strip is trimmed in a head-tail and plate shape to form a coiled copper strip.
Step S2: thinning the head and tail of the copper strip to 3mm-6mm; specifically, the thinning is realized by a rolling process, the length of the head part and the tail part can be selected to be 1m-30m, the copper strips except the head part and the tail part are taken as the body parts, in order to enable the length of the copper strips immersed in the cleaning liquid to be equal to the length of the tail part, the length of the head part is set to be far smaller than the length of the tail part, for example, the length of the head part is 1m-3m, the length of the tail part is 10m-30m, and even if the tail part with the length of 10m-30m is immersed in the cleaning liquid, no extra waste product is caused. After rolling and thinning are finished, the copper strips are subjected to cover annealing, the rolled copper strips are subjected to cover annealing in a whole roll mode, the cover annealing temperature is 380 ℃, the temperature is raised for 4 hours, the heat is preserved for 6 hours, after the cover annealing is finished, the copper strips are cooled to below 280 ℃ by air and then cooled to room temperature by water, and a second copper strip obtained by the cover annealing is annealed in a relatively static state, so that the annealing efficiency is high, and the occupied space is small.
Step S3: overlapping the tail part and the head part of the adjacent copper strips, and pressing or welding to obtain continuous copper strips; specifically, in the prior art, a first copper strip 1 and a first copper strip 2 are directly lapped together in a mode shown in fig. 1, the first copper strip 1 and the first copper strip 2 are adjacent copper strips, if the lap joint is carried out by using copper strips with the thickness of 7mm-10mm, the minimum thickness of the lap joint is 14mm, the thickness limit of the existing lamination or welding equipment is exceeded, the continuous cleaning passivation of the ultra-thick copper strips is not realized, and the continuous cleaning passivation of the ultra-thick copper strips is influenced; for this reason, in order to achieve the lap joint of the ultra-thick copper strip and to perform continuous cleaning by adopting the existing equipment, the lap joint mode of this embodiment is shown in fig. 2, the initial state of the first copper strip 1 and the second copper strip 2 (adjacent copper strips) is coiled materials, and the head and tail of the adjacent copper strips are 3mm-6mm; when the first copper strip 1 is unwound to the tail, the unwinding is stopped, the second copper strip 2 is unwound and the head part and the tail part are unfolded, the head part and the tail part are overlapped, the thickness of the head part and the tail part is reduced to be not more than 6mm, the maximum thickness of the overlapped head part and the overlapped tail part is 12mm, the overlapped thickness of the existing equipment can still be met, the ultra-thick copper strip can be suitable for continuous cleaning of the existing equipment after the two ends of the copper strip are thinned and overlapped, specifically, the ultra-thick copper strip with the thickness of 7mm-10mm and the preferred thickness of 8mm can be continuously cleaned and passivated, the ultra-thick copper strip with the thickness of 7mm-10mm can be prepared into the ultra-thick copper strip with the thickness of 7mm-10mm after being cut, the ultra-thick copper strip can be used as a connecting piece for fast charging of a vehicle battery, and the ultra-thick copper strip can bear a faster charging rate.
Step S4: and cleaning and passivating the continuous copper strip. Specifically, because the thickness of the copper strip body is 7mm-10mm, preferably 8mm, the copper strip with the thickness needs to pass through a plurality of driving rollers when being cleaned and passivated, because the thickness of the copper strip body is large, the copper strip is not flexible, a large amount of labor and time are required to be consumed when the copper strip is worn, and if continuous cleaning and passivation cannot be realized, the production efficiency and the cost of the ultra-thick copper strip for new energy are greatly influenced, therefore, in order to ensure continuous cleaning and passivation, the adjacent copper strips are necessarily connected through the step S3, and the continuous cleaning and passivation can be realized, thereby ensuring the production efficiency and the production cost of the ultra-thick copper strip for new energy.
It should be further noted that when the head of the copper strip is thinned to 3mm-6mm, the head of the copper strip is more easily bent, and the workload of passing a plurality of driving rollers during cleaning and passivation can be reduced.
Claims (10)
1. The copper strip cleaning and connecting structure for the connecting piece is characterized by comprising a first copper strip and a second copper strip;
the first copper strip comprises a first body part, a first head part and a first tail part, wherein the first head part and the first tail part are arranged at two ends of the first body part, and the second copper strip comprises a second body part, and a second head part and a second tail part, which are arranged at two ends of the second body part;
the thickness of the first tail portion and the first head portion is smaller than that of the first body portion;
the thickness of the second tail portion and the second head portion is smaller than that of the second body portion;
and overlapping and pressing or welding the first tail part and the second head part.
2. The copper strip cleaning tape splicing structure for connectors as recited in claim 1, wherein said first copper strip and said second copper strip are each coiled materials.
3. The copper strip cleaning tape receiving structure for connectors as claimed in claim 2, wherein the thickness of each of the first body portion and the second body portion is 7mm to 10mm;
the thickness of the first head part and the thickness of the first tail part are 3mm-6mm;
the thickness of the second head part and the second tail part is 3mm-6mm.
4. A copper strip cleaning tape splicing structure for connectors according to any of claims 1 to 3, wherein the length of the first head portion and the first tail portion is 1m to 30m, and the length of the second head portion and the second tail portion is 1m to 30m.
5. A copper strip cleaning tape splicing structure for connectors according to any of claims 1 to 3, wherein the welding is argon arc welding.
6. The copper strip cleaning and tape connecting process for the connecting piece is characterized by comprising the following steps of:
rolling the copper strip blank to a copper strip with the thickness of 7mm-10mm;
thinning the head and tail of the copper strip to 3mm-6mm;
overlapping the tail part and the head part of the adjacent copper strips, and pressing or welding to obtain continuous copper strips;
and cleaning and passivating the continuous copper strip.
7. The copper strip cleaning and taping process for connectors as claimed in claim 1, wherein the thickness of the copper strip blank is 12mm-20mm.
8. The copper strip cleaning and taping process for connectors as claimed in claim 7, wherein the copper strip blank is a coiled material.
9. The copper strip cleaning and taping process for connectors as claimed in any one of claims 6 to 8, further comprising the steps of:
milling the surface of the copper strip blank;
the copper strips are trimmed in a head-tail and plate shape;
and carrying out cover annealing on the copper strip.
10. The copper strip cleaning and taping process for connectors as claimed in claim 9, wherein the hood annealing temperature is 380 ℃, the temperature is raised for 4 hours, and the temperature is kept for 6 hours;
after the hood-type annealing is completed, the temperature is cooled to below 280 ℃ by air and then cooled to room temperature by water.
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| CN202310369358.0A CN116372517B (en) | 2023-04-07 | 2023-04-07 | Copper strip cleaning and tape connecting structure and process for connecting piece |
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| CN202310369358.0A CN116372517B (en) | 2023-04-07 | 2023-04-07 | Copper strip cleaning and tape connecting structure and process for connecting piece |
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| CN116372517B CN116372517B (en) | 2023-11-14 |
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