CN111843169A - Method for ultrasonically welding copper thin plate and nickel thin plate - Google Patents
Method for ultrasonically welding copper thin plate and nickel thin plate Download PDFInfo
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- CN111843169A CN111843169A CN202010605034.9A CN202010605034A CN111843169A CN 111843169 A CN111843169 A CN 111843169A CN 202010605034 A CN202010605034 A CN 202010605034A CN 111843169 A CN111843169 A CN 111843169A
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- nickel
- sheet
- welding
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- thin plate
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/10—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating making use of vibrations, e.g. ultrasonic welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/16—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating with interposition of special material to facilitate connection of the parts, e.g. material for absorbing or producing gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/24—Preliminary treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/18—Dissimilar materials
Abstract
A method for welding a copper sheet and a nickel sheet by ultrasonic waves is characterized in that nano nickel formate particles are coated between the copper sheet and the nickel sheet to be welded to form a middle layer with the thickness of 15-45 mu m; before the middle layer is coated, the copper thin plate and the nickel thin plate are immersed into a dilute hydrochloric acid solution with the concentration of 4.5% -8.8% for cleaning for 5-10 minutes, and then are cleaned by pure alcohol and dried; carrying out ultrasonic welding on the copper sheet and the nickel sheet coated with the nano nickel formate particle intermediate layer, wherein the welding time is 0.20-0.75 s, the welding pressure is 30-60 psi, and the welding amplitude is 25-55 mu m; according to the invention, the nano nickel formate particles are used as the middle layer to assist ultrasonic welding of the copper sheet and the nickel sheet, the maximum shear strength can reach 2898N, the resistance of a joint is less than 102 mu omega, the mechanical property and the conductivity of the joint are improved, and the requirement of the automobile power battery industry on ultrasonic welding of the copper/nickel joint can be met.
Description
Technical Field
The invention relates to the technical field of welding, in particular to a method for ultrasonically welding a copper thin plate and a nickel thin plate.
Background
Copper and nickel are used as conductor materials for automotive power batteries and battery packs, and therefore welded joints between copper thin plates and nickel thin plates are inevitably present. Although the welding methods such as electron beam welding, plasma welding, laser welding and the like which are commonly used at present can weld the copper thin plate and the nickel thin plate, the methods can melt a base material, so that the grain size of a welding seam and a heat affected zone is large, and the specific grain orientation is changed, which can cause the electrical conductivity and the mechanics of a copper/nickel joint to be reduced, and how to weld the copper thin plate and the nickel thin plate under the condition of basically not changing the grain size and the grain orientation of the base material is a difficult problem.
Ultrasonic welding has the advantages of short welding time and small welding energy, and is widely applied to welding copper sheets and nickel sheets at present, however, because the surface of a welding head of an ultrasonic metal welding machine has specific tooth-shaped patterns, an unwelded area is easily generated at a welding interface below the position between sharp teeth, and the electric conductivity and the mechanical property of the joint are influenced; therefore, a welding method capable of increasing the welding area of the interface of the ultrasonic welding copper sheet/nickel sheet is needed.
Disclosure of Invention
In view of the above, the present invention provides a method for ultrasonically welding a copper thin plate and a nickel thin plate, which can increase the welding area of the interface between the ultrasonically welded copper thin plate and the nickel thin plate, and further increase the mechanical properties and the electrical conductivity of the joint between the ultrasonically welded copper thin plate and the nickel thin plate.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a method for welding a copper sheet and a nickel sheet by ultrasonic waves is characterized in that nano nickel formate particles are coated between the copper sheet and the nickel sheet to be welded to form a middle layer with the thickness of 15-45 mu m; and carrying out ultrasonic welding on the copper sheet and the nickel sheet coated with the nano nickel formate particle intermediate layer, wherein the welding time is 0.20-0.75 s, the welding pressure is 30-60 psi, and the welding amplitude is 25-55 mu m.
Furthermore, the material of the nickel thin plate is pure nickel, and the material of the copper thin plate is T2 copper.
Furthermore, the thickness of the copper thin plate is 0.1-3 mm, and the thickness of the nickel thin plate is 0.1-1.5 mm.
Furthermore, the particle size of the nano nickel formate particles is 15-50 nm.
Further, before the nano nickel formate particle middle layer is coated, the copper thin plate and the nickel thin plate are immersed into a dilute hydrochloric acid solution with the concentration of 4.5-8.8% for cleaning for 5-10 minutes, and then the copper thin plate and the nickel thin plate are cleaned by pure alcohol and dried.
Furthermore, the connection mode between the copper thin plate and the nickel thin plate is lap joint, the copper thin plate is an upper weldment and is in direct contact with a welding head, and the nickel thin plate is a lower weldment and is in direct contact with a chopping board.
Further, the nano nickel formate particles are coated on the surface of the nickel sheet to be welded by means of printing.
The invention has the beneficial effects that:
according to the invention, the copper thin plate and the nickel thin plate which are added with the nano nickel formate particles as the middle layer are welded by ultrasonic waves, and the temperature of a welding interface can be adjusted by controlling the size of the nano nickel formate particles during ultrasonic welding. The nano nickel formate particles have better dispersibility and are not easy to oxidize in the air, when the temperature of a welding interface reaches the decomposition temperature of the nano nickel formate, the nano nickel formate is decomposed into nano nickel particles, hydrogen and carbon dioxide, and the generated hydrogen has certain reducibility and can play a role in reducing interface oxides; meanwhile, the molten or semi-molten nano nickel can effectively repair the defects of the non-welded area of the welding interface in the welding process, so that the purpose of improving the welding area of the welding interface is achieved, and the weldability of the copper thin plate and the nickel thin plate is improved; because the added middle layer is the nano nickel formate particles, the product left on the welding interface after thermal decomposition is the nano nickel particles, no third foreign element is introduced, and no other intermetallic compound is generated on the welding interface, thereby improving the mechanical property and the electric conductivity of the welding joint;
The invention adopts nano nickel formate particles as the intermediate layer to assist the ultrasonic welding of the maximum shear strength of the joint between the copper sheet and the nickel sheet can reach 2898N, and the resistance of the joint is less than 102 mu omega. The method solves the problem of the defect that the interface of the ultrasonic welding copper/nickel joint is not welded, improves the mechanical property and the conductivity of the joint, and can meet the performance requirement of the automobile power battery industry on the ultrasonic welding copper/nickel joint.
Detailed Description
The following specific examples are given to further clarify, complete and detailed the technical solution of the present invention. The present embodiment is a preferred embodiment based on the technical solution of the present invention, but the scope of the present invention is not limited to the following embodiments.
Example 1
A method for welding a copper sheet and a nickel sheet by ultrasonic waves is characterized in that the copper sheet and the nickel sheet to be welded are taken, wherein the copper sheet is a T2 copper sheet with the thickness of 0.3mm, the nickel sheet is a pure nickel sheet with the thickness of 0.3mm, before a middle layer of nano nickel formate particles is coated, the copper sheet and the nickel sheet are immersed into a dilute hydrochloric acid solution with the concentration of 4.5% for cleaning for 6 minutes, then cleaned by pure alcohol and dried;
then coating nano nickel formate particles on the surface of the aluminum sheet to be welded by means of printing to form an intermediate layer, wherein the particle size of the nano nickel formate particles is 25nm, and the thickness of the intermediate layer is 25 microns;
The copper sheet is an upper weldment and is in direct contact with a welding head, the nickel sheet is a lower weldment and is in direct contact with a chopping board, and the copper sheet is connected with the nickel sheet by adopting an overlapping method; the copper and nickel sheets coated with the intermediate layer of nickel nano-formate particles were then ultrasonically welded for 0.25 seconds at a weld pressure of 30psi and a weld amplitude of 25 μm.
According to the invention, the copper sheet and the nickel sheet added with the nano nickel formate particle intermediate layer are welded by ultrasonic waves, and the temperature of a welding interface can be adjusted by controlling the size of the nano nickel formate particles during ultrasonic welding, so that the weldability of the copper sheet and the nickel sheet is improved; meanwhile, the nanometer nickel in a molten or semi-molten state in the welding process can effectively repair the defects of the non-welded area of the welding interface, thereby achieving the purpose of improving the welding area of the welding interface; the added middle layer is the nano nickel formate particles, no third heterogeneous element is introduced, and no other intermetallic compound is generated on a welding interface, so that the mechanical property and the conductivity of a welding joint are improved; the performance parameters of the ultrasonic welding copper sheet and nickel sheet joint in the embodiment 1 of the invention are as follows: the shearing force is 397.6N, which is increased by 25.6 percent compared with the shearing force of an ultrasonic welding copper/nickel joint without the nano nickel formate particle middle layer; the resistance was 45 μ Ω, which is 8.6% lower than the resistance of an ultrasonically welded copper/nickel joint without an intermediate layer of nano nickel formate particles.
Example 2
A method for welding a copper sheet and a nickel sheet by ultrasonic waves is characterized in that the copper sheet and the nickel sheet to be welded are taken, wherein the copper sheet is a T2 copper sheet with the thickness of 0.5mm, the nickel sheet is a pure nickel sheet with the thickness of 0.7mm, before a middle layer of nano nickel formate particles is coated, the copper sheet and the nickel sheet are immersed into a dilute hydrochloric acid solution with the concentration of 5% for cleaning for 7 minutes, then cleaned by pure alcohol and dried;
then coating nano nickel formate particles on the surface of the aluminum sheet to be welded by means of printing to form an intermediate layer, wherein the particle size of the nano nickel formate particles is 20nm, and the thickness of the intermediate layer is 20 microns;
the copper sheet is an upper weldment and is in direct contact with a welding head, the nickel sheet is a lower weldment and is in direct contact with a chopping board, and the copper sheet is connected with the nickel sheet by adopting an overlapping method; the copper and nickel sheets coated with the intermediate layer of nickel nano-formate particles were then ultrasonically welded for 0.45s at a weld pressure of 45psi and a weld amplitude of 40 μm.
According to the invention, the copper sheet and the nickel sheet added with the nano nickel formate particle intermediate layer are welded by ultrasonic waves, and the temperature of a welding interface can be adjusted by controlling the size of the nano nickel formate particles during ultrasonic welding, so that the weldability of the copper sheet and the nickel sheet is improved; meanwhile, the nanometer nickel in a molten or semi-molten state in the welding process can effectively repair the defects of the non-welded area of the welding interface, thereby achieving the purpose of improving the welding area of the welding interface; the added middle layer is the nano nickel formate particles, no third heterogeneous element is introduced, and no other intermetallic compound is generated on a welding interface, so that the mechanical property and the conductivity of a welding joint are improved; the performance parameters of the ultrasonic welding copper sheet and nickel sheet joint in embodiment 2 of the invention are as follows: the shearing force is 2216.7N, which is improved by 30.7% compared with the shearing force of the ultrasonic welding copper/nickel joint without the nano nickel formate particle intermediate layer; the resistance was 59 μ Ω, which is a 9.2% reduction in resistance over the ultrasonically welded copper/nickel joint without the intermediate layer of nano nickel formate particles.
Example 3
A method for welding a copper sheet and a nickel sheet by ultrasonic waves is characterized in that the copper sheet and the nickel sheet to be welded are taken, wherein the copper sheet is a T2 copper sheet with the thickness of 0.9mm, the nickel sheet is a pure nickel sheet with the thickness of 1.1mm, before a middle layer of nano nickel formate particles is coated, the copper sheet and the nickel sheet are immersed into a dilute hydrochloric acid solution with the concentration of 7% for cleaning for 9 minutes, then cleaned by pure alcohol and dried;
then coating nano nickel formate particles on the surface of the aluminum sheet to be welded by means of printing to form an intermediate layer, wherein the particle size of the nano nickel formate particles is 18nm, and the thickness of the intermediate layer is 22 microns;
the copper sheet is an upper weldment and is in direct contact with a welding head, the nickel sheet is a lower weldment and is in direct contact with a chopping board, and the copper sheet is connected with the nickel sheet by adopting an overlapping method; the copper and nickel sheets coated with the intermediate layer of nickel nano-formate particles were then ultrasonically welded for 0.45s at a weld pressure of 50psi and a weld amplitude of 45 μm.
According to the invention, the copper sheet and the nickel sheet added with the nano nickel formate particle intermediate layer are welded by ultrasonic waves, and the temperature of a welding interface can be adjusted by controlling the size of the nano nickel formate particles during ultrasonic welding, so that the weldability of the copper sheet and the nickel sheet is improved; meanwhile, the nanometer nickel in a molten or semi-molten state in the welding process can effectively repair the defects of the non-welded area of the welding interface, thereby achieving the purpose of improving the welding area of the welding interface; the added middle layer is the nano nickel formate particles, no third heterogeneous element is introduced, and no other intermetallic compound is generated on a welding interface, so that the mechanical property and the conductivity of a welding joint are improved; the performance parameters of the ultrasonic welding copper sheet and nickel sheet joint in embodiment 3 of the invention are as follows: the shearing force is 2564.8N, which is improved by 32.4% compared with the shearing force of the ultrasonic welding copper/nickel joint without the nano nickel formate particle intermediate layer; the resistance was 87 μ Ω, which was a 10.5% reduction in resistance compared to the ultrasonically welded copper/nickel joint without the intermediate layer of nano nickel formate particles.
The principal features, principles and advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to explain the principles of the invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the invention as expressed in the following claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. A method for ultrasonically welding a copper sheet and a nickel sheet is characterized in that nano nickel formate particles are coated between the copper sheet and the nickel sheet to be welded to form an intermediate layer with the thickness of 15-45 mu m; and carrying out ultrasonic welding on the copper sheet and the nickel sheet coated with the nano nickel formate particle intermediate layer, wherein the welding time is 0.20-0.75 s, the welding pressure is 30-60 psi, and the welding amplitude is 25-55 mu m.
2. The method of claim 1, wherein the nickel sheet is pure nickel and the copper sheet is T2 copper.
3. The method of claim 1, wherein the copper sheet has a thickness of 0.1 to 3mm and the nickel sheet has a thickness of 0.1 to 1.5 mm.
4. The method of claim 1, wherein the particle size of the nickel nano formate particles is 15-50 nm.
5. The method of claim 1, wherein before the intermediate layer of nano nickel formate particles is coated, the copper sheet and the nickel sheet are immersed in a dilute hydrochloric acid solution with a concentration of 4.5-8.8% for cleaning for 5-10 minutes, then cleaned with pure alcohol, and dried.
6. The method of claim 1, wherein the copper sheet is attached to the nickel sheet in a lap joint, the copper sheet is an upper weldment and is in direct contact with the welding head, and the nickel sheet is a lower weldment and is in direct contact with the anvil.
7. A method of ultrasonic welding of a copper sheet to a nickel sheet as claimed in claim 6, characterized in that the nano nickel formate particles are applied by printing to the surface of the nickel sheet to be welded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010605034.9A CN111843169B (en) | 2020-06-29 | 2020-06-29 | Method for ultrasonically welding copper thin plate and nickel thin plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010605034.9A CN111843169B (en) | 2020-06-29 | 2020-06-29 | Method for ultrasonically welding copper thin plate and nickel thin plate |
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| Publication Number | Publication Date |
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| CN111843169A true CN111843169A (en) | 2020-10-30 |
| CN111843169B CN111843169B (en) | 2022-01-07 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004356319A (en) * | 2003-05-28 | 2004-12-16 | Fujikura Ltd | Ultrasonic jointing copper material |
| CN107833651A (en) * | 2017-10-25 | 2018-03-23 | 哈尔滨工业大学深圳研究生院 | A kind of composite Nano silver paste and Fast Sintering method for packing |
| CN109365982A (en) * | 2018-11-29 | 2019-02-22 | 华北水利水电大学 | A kind of copper thin material ultrasonic spot welding connection method |
| CN109759741A (en) * | 2019-03-13 | 2019-05-17 | 重庆理工大学 | A kind of ultrasonic wave added soldering brazing powder and method for welding |
| CN110369911A (en) * | 2019-06-27 | 2019-10-25 | 上海三一重机股份有限公司 | A kind of copper nano-weld material and preparation method thereof |
-
2020
- 2020-06-29 CN CN202010605034.9A patent/CN111843169B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004356319A (en) * | 2003-05-28 | 2004-12-16 | Fujikura Ltd | Ultrasonic jointing copper material |
| CN107833651A (en) * | 2017-10-25 | 2018-03-23 | 哈尔滨工业大学深圳研究生院 | A kind of composite Nano silver paste and Fast Sintering method for packing |
| CN109365982A (en) * | 2018-11-29 | 2019-02-22 | 华北水利水电大学 | A kind of copper thin material ultrasonic spot welding connection method |
| CN109759741A (en) * | 2019-03-13 | 2019-05-17 | 重庆理工大学 | A kind of ultrasonic wave added soldering brazing powder and method for welding |
| CN110369911A (en) * | 2019-06-27 | 2019-10-25 | 上海三一重机股份有限公司 | A kind of copper nano-weld material and preparation method thereof |
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| CN111843169B (en) | 2022-01-07 |
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