CN116960650A - Terminal welding structure and welding process thereof - Google Patents
Terminal welding structure and welding process thereof Download PDFInfo
- Publication number
- CN116960650A CN116960650A CN202311091868.2A CN202311091868A CN116960650A CN 116960650 A CN116960650 A CN 116960650A CN 202311091868 A CN202311091868 A CN 202311091868A CN 116960650 A CN116960650 A CN 116960650A
- Authority
- CN
- China
- Prior art keywords
- welding
- terminal
- foil strip
- strip
- foil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003466 welding Methods 0.000 title claims abstract description 165
- 238000000034 method Methods 0.000 title claims abstract description 44
- 239000011888 foil Substances 0.000 claims abstract description 126
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 71
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 66
- 239000010937 tungsten Substances 0.000 claims abstract description 66
- 229910052782 aluminium Inorganic materials 0.000 claims description 32
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 32
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 17
- 229910052802 copper Inorganic materials 0.000 claims description 15
- 239000010949 copper Substances 0.000 claims description 15
- 238000010891 electric arc Methods 0.000 claims description 6
- 238000005498 polishing Methods 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000011324 bead Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 230000001133 acceleration Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 239000011889 copper foil Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/02—Soldered or welded connections
- H01R4/029—Welded connections
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/06—Coil winding
- H01F41/076—Forming taps or terminals while winding, e.g. by wrapping or soldering the wire onto pins, or by directly forming terminals from the wire
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Arc Welding In General (AREA)
Abstract
The invention belongs to the technical field of welding, and discloses a terminal welding structure and a welding process thereof, wherein the welding structure comprises: the terminal strip and the foil belt are arranged on the same surface of the terminal strip; the foil strip is welded on the welding surface, and one end of the foil strip is flush with the terminal strip; in addition, the end face of the terminal strip, which is flush with the foil strip, is perpendicular to the welding surface, and an auxiliary groove is formed in the end face. According to the welding structure, the auxiliary groove is formed at the end part of the terminal strip, the terminal strip is divided into a plurality of layers, and the thickness of the layer contacting the foil strip is heated for a period of time, so that the problems of difficult welding and overlong heating time caused by the fact that the terminal strip is too thick are solved; according to the welding process, the tungsten electrode diameter, the welding current and the gas flow are selected according to the thickness of the foil strip, so that parameter support is provided for the welding process, and the welding yield is improved.
Description
Technical Field
The invention belongs to the technical field of welding, and particularly relates to a terminal welding structure and a welding process thereof.
Background
A transformer is a device that changes voltage, current, and waveform using the principle of electromagnetic induction. In a power electronic system, a transformer is very important, and mainly consists of an iron core, a coil and corresponding fasteners, so that the performance of a product is greatly affected by the welding quality of a terminal in the manufacturing of the coil, and the terminal is very difficult to weld due to the fact that the terminal is excessively thick and needs to be heated for a very long time, and the terminal is also damaged due to the excessively long heating time, so that the invention of the welding process method is provided for the problems.
Disclosure of Invention
In order to solve at least one problem in the background art, the invention provides a terminal welding structure and a welding process thereof.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a terminal welding structure comprises a terminal strip and a foil strip;
one surface of the terminal strip is a welding surface;
the foil strip is welded on the welding surface, and one end of the foil strip is flush with the terminal strip;
the end face of the terminal strip, which is flush with the foil belt, is perpendicular to the welding surface;
an auxiliary groove is formed in the end face of the terminal strip, which is flush with the foil strip;
the thickness L=a+b+c of the terminal strip, L is more than or equal to 14mm, wherein c is the thickness of the auxiliary groove, a and b are the thicknesses of the terminal strips at two sides of the auxiliary groove, and a=b;
the thickness d of the foil belt is smaller than or equal to a;
the depth of the auxiliary groove 101 is not less than 5mm.
A terminal welding process is used for the welding structure and comprises the following steps:
the diameter of the tungsten electrode, welding current and gas flow rate are selected according to the thickness of the foil strip;
selecting a nozzle according to the diameter of the tungsten electrode;
polishing the end of the tungsten wire;
fixing the terminal strip and the foil strip on a welding frame, wherein the foil strip is arranged above the terminal strip and is flush with the terminal strip, and a steel plate is arranged on the foil strip, so that the foil strip with the end part of the foil strip being exposed for 3-5 mm is exposed;
the tungsten electrode and the foil are not contacted to ignite an electric arc;
the tungsten electrode end of the welding gun is aligned with the joint of the terminal strip and the foil strip for welding, the distance between the tungsten electrode and the foil strip is 2-5 mm, the welding gun maintains an inclination angle of 70-85 degrees, the welding gun is preheated for 1-3 seconds at the beginning of the foil strip after the electric arc is ignited, the welding gun moves at a uniform speed in a straight line, and the welding current is adjusted based on the change of a molten pool until arc is received.
Preferably, when the foil thickness is 0 to 0.4 mm: the diameter of the tungsten electrode is 2.4mm or 3.2mm; when the foil strip is aluminum, the welding current is 45-135A; when the foil strip is copper, the welding current is 120-150A; the gas flow is 8-10L/min.
Preferably, when the foil thickness is 0.4 to 1 mm: the diameter of the tungsten electrode is 2.4mm or 3.2mm; when the foil strip is aluminum, the welding current is 135-220A; when the foil strip is copper, the welding current is 150-320A; the gas flow is 8-12L/min.
Preferably, when the foil thickness is 1 to 1.6 mm: the diameter of the tungsten electrode is 2.4mm or 3.2mm; when the foil strip is aluminum, the welding current is 220-240A; when the foil strip is copper, the welding current is 320-420A; the gas flow is 8-14L/min.
Preferably, when the foil thickness is 1.6-2 mm: the diameter of the tungsten electrode is 3.2mm; when the foil strip is aluminum, the welding current is 240-260A; the gas flow is 10-16L/min.
Preferably, when the foil thickness is 2-3 mm: the diameter of the tungsten electrode is 3.2mm; when the foil strip is aluminum, the welding current is 260-300A; the gas flow is 14-18L/min.
Preferably, when the foil thickness is 3mm or more: the diameter of the tungsten electrode is 3.2mm; when the foil strip is aluminum, the welding current is more than or equal to 300A; the gas flow is 14-18L/min.
Preferably, the inner diameter of the nozzle is 2.5 to 3.5 times of the diameter of the tungsten electrode.
Preferably, polishing the end of the tungsten wire, and when the foil strip is copper, selecting a direct current power supply, and polishing the end of the tungsten electrode into a cone shape; when the foil belt is made of aluminum, an alternating current power supply is selected, and the end part of the tungsten electrode is polished into a cylinder shape.
Preferably, adjusting the welding current based on the puddle variation comprises:
when the molten pool is enlarged, the welding line is widened or concave, the moving speed of the welding gun is increased or the welding current is reduced; when the weld pool becomes smaller and the weld bead becomes narrower, the speed of movement of the gun is reduced or the welding current is increased.
Preferably, the arc is extinguished by a current attenuation method or a molten pool attenuation method.
The invention has the beneficial effects that:
1. according to the welding structure, the auxiliary groove is formed at the end part of the terminal strip, the terminal strip is divided into a plurality of layers, and the thickness of the layer contacting the foil strip is heated for a period of time, so that the problems of difficult welding and overlong heating time caused by the fact that the terminal strip is too thick are solved;
2. according to the welding process, the tungsten electrode diameter, the welding current and the gas flow are selected according to the thickness of the foil strip, so that parameter support is provided for the welding process, and the welding yield is improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 shows a schematic view of a terminal bonding structure of the present invention;
FIG. 2 shows a flow chart of a terminal bonding process of the present invention;
FIG. 3 shows a schematic diagram of the current decay method of the present invention;
FIG. 4 shows a schematic diagram of the molten pool attenuation method of the present invention.
In the figure: 1. a terminal block; 101. an auxiliary groove; 2. a foil strip.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The utility model provides a terminal welding structure, as shown in fig. 1, includes terminal strip 1 and foil 2, wherein one surface of terminal strip 1 is the welding face, and foil 2 welds on the welding face, and one end is parallel and level with terminal strip 1; in addition, the end face of the terminal strip 1, which is flush with the foil strip 2, is perpendicular to the welding surface, and an auxiliary groove 101 is formed in the end face; the thickness l=a+b+c of the terminal strip 1, L is not less than 14mm, wherein c is the thickness of the auxiliary groove 101, a and b are the thicknesses of the terminal strips 1 on both sides of the auxiliary groove 101, and a=b; the thickness d of the foil strip 2 is less than or equal to a, and the depth of the auxiliary groove 101 is not less than 5mm.
For the welding structure in fig. 1, the invention provides a terminal welding process, as shown in fig. 2, comprising the following steps:
s1: the diameter of the tungsten electrode, welding current and gas flow rate are selected according to the thickness of the foil strip 2;
s2: selecting a nozzle according to the diameter of the tungsten electrode; wherein the inner diameter of the nozzle is 2.5-3.5 times of the diameter of the tungsten electrode.
S3: polishing the end of the tungsten wire; when the foil strip 2 is copper, a direct current power supply is selected, the end part of the tungsten electrode is polished into a cone shape, the taper depends on current, and the smaller the current, the larger the taper; when the foil strip 2 is aluminum, an alternating current power supply is selected, and the end part of the tungsten electrode is polished into a cylinder shape.
S4: fixing the terminal strip 1 and the foil strip 2 on a welding frame, wherein the foil strip 2 is above the terminal strip 1 and is flush with the terminal strip 1, and a steel plate is placed on the foil strip 2 to expose the end part of the foil strip 2 to 3-5 mm;
s5: the tungsten electrode and the foil strip 2 are not contacted to ignite an electric arc; the arc is initiated by adopting an arc initiator (a high-frequency oscillator or a high-frequency pulse generator), and the tungsten electrode is not contacted with a welding piece to ignite the arc. When the arc striking device is not used, contact arc striking (which is mainly used for construction site installation, in particular high-altitude installation) can be performed on a groove of a weldment by using red copper or graphite.
S6: the tungsten electrode end of the welding gun is aligned with the joint of the terminal strip 1 and the foil strip 2 for starting welding (for welding the multi-layer foil strip 2 and the terminal strip 1, the position of the starting welding point is the joint of the innermost foil strip 2 and the terminal strip 1), the distance between the tungsten electrode and the foil strip 2 is 2-5 mm, the welding gun maintains a dip angle of 70-85 degrees, the welding gun is preheated for 1-3 seconds at the beginning of the foil strip 2 after the electric arc is ignited, the welding gun moves linearly at a uniform speed, and the welding current is adjusted based on the change of a molten pool (for example, when the molten pool is enlarged, the welding seam is widened or is recessed, the moving speed of the welding gun is increased or the welding current is reduced, and when the molten pool is reduced and the welding seam is narrowed), the moving speed of the welding gun is reduced or the welding current is increased until arc is received.
When arc starting is performed, a current attenuation method or a molten pool attenuation method is used. Specifically, the welding gun with the arc starter needs to intermittently receive the arc or adjust the arc to proper arc receiving current for slow arc receiving, if the arc starter welder is not used, the arc is slowly guided to one side of the groove, no shrinkage hole is generated, and if the shrinkage hole is generated, the welding gun can be welded after being polished. When the welding seam is welded for one time as much as possible and arc stopping is needed in the middle of welding due to a certain reason, a correct arc stopping mode is adopted, and the welding seam is not stopped suddenly so as to avoid shrinkage cavity. Gradually reducing welding current by using a current attenuation method, slowly cooling, reducing a molten pool and finishing arc stopping; the arc moving speed is accelerated by using a molten pool attenuation method, and the arc moving length is completed within 20-30 mm and 3-5 s, so that the molten pool is gradually reduced. In addition, the manually welded tungsten electrode has an extension length of 5-10mm, and the semi-automatic welded tungsten electrode has an extension length of 3-4mm.
As shown in fig. 3, in the current decay method, the welding current is maintained for a certain period of time, and then decays linearly in a decay section, and finally, the arc is extinguished. In addition, as shown in fig. 4, the molten pool attenuation method comprises a normal arc-conveying section and an acceleration arc-conveying section, wherein the welding gun is full in welding line in the normal arc-conveying section, uniform in size and stable in welding speed, after entering the acceleration arc-conveying section, the welding speed is increased, the welding line is gradually reduced, and the welding line of the whole acceleration arc-conveying section (20-30 mm) is completed within 3-5 seconds.
As shown in table 1, when the foil tape 2 has a thickness of 0 to 0.4 mm: the diameter of the tungsten electrode is 2.4mm or 3.2mm; when the foil strip 2 is made of aluminum (material), the welding current is 45-135A; when the foil strip 2 is made of copper (material), the welding current is 120-150A; the gas flow is 8-10L/min. When the thickness of the foil strip 2 is 0.4-1 mm: the diameter of the tungsten electrode is 2.4mm or 3.2mm; when the foil strip 2 is aluminum, the welding current is 135-220A; when the foil strip 2 is copper, the welding current is 150-320A; the gas flow is 8-12L/min. When the thickness of the foil strip 2 is 1-1.6 mm: the diameter of the tungsten electrode is 2.4mm or 3.2mm; when the foil strip 2 is aluminum, the welding current is 220-240A; when the foil strip 2 is copper, the welding current is 320-420A; the gas flow is 8-14L/min. When the thickness of the foil strip 2 is 1.6-2 mm: the diameter of the tungsten electrode is 3.2mm; when the foil strip 2 is aluminum, the welding current is 240-260A; the gas flow is 10-16L/min. When the thickness of the foil strip 2 is 2-3 mm: the diameter of the tungsten electrode is 3.2mm; when the foil strip 2 is aluminum, the welding current is 260-300A; the gas flow is 14-18L/min. When the thickness of the foil tape 2 is 3mm or more: the diameter of the tungsten electrode is 3.2mm; when the foil strip 2 is aluminum, the welding current is more than or equal to 300A; the gas flow is 14-18L/min.
TABLE 1
Example two
On the basis of the first embodiment, the depth of the auxiliary groove 101 is 5mm, the inner diameter of the nozzle is 3 times of the diameter of the tungsten electrode, a current attenuation method is adopted during arc collection, and when the thickness of the foil strip 2 is 0.3mm, the diameter of the tungsten electrode is 2.4mm; the foil strip 2 is aluminum, the welding current is 120A, the gas flow is 9L/min, and the welding is carried out according to the steps S1 to S6.
In the second embodiment, the temperature rising speed of the terminal is higher, the aluminum foil is melted faster, the aluminum foil and the surface metal of the terminal are well welded, the size of a molten pool and the width of a welding line are moderate, and the welding is qualified.
Example III
On the basis of the first embodiment, the depth of the auxiliary groove 101 is 5mm, the inner diameter of the nozzle is 3 times of the diameter of the tungsten electrode, a current attenuation method is adopted during arc collection, and when the thickness of the foil strip 2 is 0.3mm, the diameter of the tungsten electrode is 2.4mm; the foil strip 2 is copper, the welding current is 120A, the gas flow is 9L/min, and the welding is carried out according to the steps S1 to S6.
In the third embodiment, the temperature rising speed of the terminal is higher, the copper foil is melted slower than the aluminum foil, so that the welding time is relatively longer, but the copper foil and the metal on the surface of the terminal are well welded, the size of a molten pool and the width of a welding seam are moderate, and the welding is qualified.
Example IV
On the basis of the first embodiment, the depth of the auxiliary groove 101 is 5mm, the inner diameter of the nozzle is 3 times of the diameter of the tungsten electrode, a current attenuation method is adopted during arc collection, and when the thickness of the foil strip 2 is 0.3mm, the diameter of the tungsten electrode is 3.2mm; the foil strip 2 is copper, the welding current is 120A, the gas flow is 9L/min, and the welding is carried out according to the steps S1 to S6.
In the fourth example, compared with the third example, the width of the welding seam is widened, the penetration is unchanged, the diameter of the tungsten electrode is related to the welding current, the larger the welding current is, the larger the diameter of the selected tungsten electrode is, and when the welding current is larger, the smaller-diameter tungsten electrode is selected to accelerate the burning loss of the tungsten electrode.
Example five
On the basis of the first embodiment, the depth of the auxiliary groove 101 is 5mm, the inner diameter of the nozzle is 3 times of the diameter of the tungsten electrode, a current attenuation method is adopted in arc striking, and when the thickness of the foil strip 2 is 0.7 mm: the diameter of the tungsten electrode is 2.4mm; the foil strip 2 is aluminum, the welding current is 180A, the gas flow is 10L/min, and the welding is carried out according to the steps S1 to S6.
Example six
On the basis of the first embodiment, the depth of the auxiliary groove 101 is 5mm, the inner diameter of the nozzle is 3 times of the diameter of the tungsten electrode, a current attenuation method is adopted in arc striking, and when the thickness of the foil strip 2 is 1.2 mm: the diameter of the tungsten electrode is 2.4mm; the foil strip 2 is aluminum, the welding current is 210A, the gas flow is 10L/min, and the welding is carried out according to the steps S1 to S6.
Example seven
On the basis of the first embodiment, the depth of the auxiliary groove 101 is 5mm, the inner diameter of the nozzle is 3 times of the diameter of the tungsten electrode, a current attenuation method is adopted in arc striking, and when the thickness of the foil strip 2 is 1.8 mm: the diameter of the tungsten electrode is 3.2mm; the foil strip 2 is aluminum, the welding current is 240A, the gas flow is 14L/min, and the welding is carried out according to the steps S1 to S6.
Example eight
On the basis of the first embodiment, the depth of the auxiliary groove 101 is 5mm, the inner diameter of the nozzle is 3 times of the diameter of the tungsten electrode, a current attenuation method is adopted in arc striking, and when the thickness of the foil strip 2 is 2.2 mm: the diameter of the tungsten electrode is 3.2mm; the foil strip 2 is aluminum, the welding current is 280A, the gas flow is 14L/min, and the welding is carried out according to the steps S1 to S6.
In the fifth to eighth embodiments, the temperature rising speed of the terminal is high, the thickness of the aluminum foil is increased, the welding current is correspondingly increased, the melting of the aluminum foil is fast, the diameter of the tungsten electrode is increased along with the increase of the current, the aluminum foil and the surface metal of the terminal are well welded, the size of the molten pool and the width of the welding seam are moderate, and the welding is qualified.
Although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (12)
1. A terminal welding structure, which is characterized by comprising a terminal strip (1) and a foil strip (2);
one surface of the terminal strip (1) is a welding surface;
the foil strip (2) is welded on the welding surface, and one end of the foil strip is flush with the terminal strip (1);
the end face of the terminal strip (1) flush with the foil strip (2) is perpendicular to the welding surface;
an auxiliary groove (101) is formed in the end face of the terminal strip (1) flush with the foil strip (2);
the thickness L=a+b+c of the terminal strip (1), L is more than or equal to 14mm, wherein c is the thickness of the auxiliary groove (101), a and b are the thicknesses of the terminal strips (1) at two sides of the auxiliary groove (101), and a=b;
the thickness d of the foil strip (2) is less than or equal to a;
the depth of the auxiliary groove (101) is not less than 5mm.
2. A terminal welding process for the welded structure of claim 1, comprising the steps of:
the diameter of the tungsten electrode, the welding current and the gas flow rate are selected according to the thickness of the foil strip (2);
selecting a nozzle according to the diameter of the tungsten electrode;
polishing the end of the tungsten wire;
fixing the terminal strip (1) and the foil strip (2) on a welding frame, wherein the foil strip (2) is arranged above the terminal strip (1) and is flush with the terminal strip (1), and a steel plate is arranged on the foil strip (2) to expose the end part of the foil strip (2) to 3-5 mm;
the tungsten electrode and the foil strip (2) are not contacted to ignite an electric arc;
the tungsten electrode end of the welding gun is aligned with the joint of the terminal strip (1) and the foil strip (2) for welding, the distance between the tungsten electrode and the foil strip (2) is 2-5 mm, the welding gun maintains an inclination angle of 70-85 degrees, the welding gun is preheated for 1-3 seconds at the beginning of the foil strip (2) after the electric arc is ignited, the welding gun moves at a uniform speed in a straight line, and the welding current is adjusted based on the change of a molten pool until arc is received.
3. A terminal welding process according to claim 2, characterized in that when the foil strip (2) has a thickness of 0-0.4 mm: the diameter of the tungsten electrode is 2.4mm or 3.2mm; when the foil strip (2) is aluminum, the welding current is 45-135A; when the foil strip (2) is copper, the welding current is 120-150A; the gas flow is 8-10L/min.
4. A terminal welding process according to claim 2, characterized in that when the foil strip (2) has a thickness of 0.4-1 mm: the diameter of the tungsten electrode is 2.4mm or 3.2mm; when the foil strip (2) is aluminum, the welding current is 135-220A; when the foil strip (2) is copper, the welding current is 150-320A; the gas flow is 8-12L/min.
5. A terminal welding process according to claim 4, characterized in that when the foil strip (2) has a thickness of 1-1.6 mm: the diameter of the tungsten electrode is 2.4mm or 3.2mm; when the foil strip (2) is aluminum, the welding current is 220-240A; when the foil strip (2) is copper, the welding current is 320-420A; the gas flow is 8-14L/min.
6. A terminal welding process according to claim 2, characterized in that when the foil strip (2) has a thickness of 1.6-2 mm: the diameter of the tungsten electrode is 3.2mm; when the foil strip (2) is aluminum, the welding current is 240-260A; the gas flow is 10-16L/min.
7. A terminal welding process according to claim 2, characterized in that when the foil strip (2) has a thickness of 2-3 mm: the diameter of the tungsten electrode is 3.2mm; when the foil strip (2) is aluminum, the welding current is 260-300A; the gas flow is 14-18L/min.
8. A terminal welding process according to claim 2, wherein when the foil strip (2) has a thickness of 3mm or more: the diameter of the tungsten electrode is 3.2mm; when the foil strip (2) is aluminum, the welding current is more than or equal to 300A; the gas flow is 14-18L/min.
9. A terminal welding process according to claim 2, wherein the nozzle has an inner diameter of 2.5 to 3.5 times the tungsten electrode diameter.
10. A terminal welding process according to claim 2, characterized in that the end of the tungsten wire is polished, and when the foil (2) is copper, a dc power supply is selected, and the end of the tungsten electrode is polished into a cone shape; when the foil belt (2) is made of aluminum, an alternating current power supply is selected, and the end part of the tungsten electrode is polished into a cylinder shape.
11. A terminal welding process according to claim 2, wherein adjusting the welding current based on the puddle change comprises:
when the molten pool is enlarged, the welding line is widened or concave, the moving speed of the welding gun is increased or the welding current is reduced; when the weld pool becomes smaller and the weld bead becomes narrower, the speed of movement of the gun is reduced or the welding current is increased.
12. A terminal welding process according to claim 2, wherein the arc is struck by using a current decay method or a puddle decay method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311091868.2A CN116960650A (en) | 2023-08-28 | 2023-08-28 | Terminal welding structure and welding process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311091868.2A CN116960650A (en) | 2023-08-28 | 2023-08-28 | Terminal welding structure and welding process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116960650A true CN116960650A (en) | 2023-10-27 |
Family
ID=88447643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311091868.2A Pending CN116960650A (en) | 2023-08-28 | 2023-08-28 | Terminal welding structure and welding process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116960650A (en) |
-
2023
- 2023-08-28 CN CN202311091868.2A patent/CN116960650A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102133679B (en) | Device and method for assisting gas metal arc welding by using externally applied magnetic fields | |
| CN107999962B (en) | A kind of method for laser welding of double CMT/ mariages CMT auxiliary | |
| IT8224676A1 (en) | METHOD AND APPARATUS FOR CHECKING THE HEATING POWER DURING THE APPLICATION OF A MELTED FILLING MATERIAL TO A WORKPIECE | |
| CN107322148B (en) | Welding method based on tungsten electrode argon arc welding and cold metal transition welding composite heat source and application | |
| CN107803593B (en) | high-frequency-laser wire filling composite welding device and method | |
| CN110052712A (en) | A kind of non-axis symmetry rotation tungsten electrode GTAW and pulse laser complex welding method | |
| WO2022257669A1 (en) | Pulsed wire feeding method based on laser-gma arc composite heat source wire-filled welding | |
| CN112139629A (en) | High-frequency pulse three-wire indirect electric arc welding method and device | |
| CN105880807A (en) | TIG filler wire narrow-gap welding method utilizing bypass arc induction | |
| CN110802323A (en) | High-entropy alloy arc-laser composite additive manufacturing method | |
| CN101396755A (en) | Mixed gas welding method for light-gage welding | |
| CN116960650A (en) | Terminal welding structure and welding process thereof | |
| CN114905151B (en) | 2219 aluminum alloy sheet electromagnetic auxiliary laser thermal conductive welding method | |
| Leng et al. | Experimental study on improving welding efficiency of twin electrode TIG welding method | |
| CN111604597B (en) | Double-electric-arc preheating laser swing welding method for K-shaped connector | |
| JPH11147175A (en) | Gas shield arc welding method | |
| CN203592236U (en) | Laser welding clamp of stainless steel sheet fillet weld | |
| JP3256089B2 (en) | Non-consumable nozzle type electroslag welding method | |
| CN110293281A (en) | A kind of narrow gap welding method swinging TIG auxiliary MIG/MAG | |
| JPH0635061B2 (en) | Narrow groove TIG welding equipment | |
| JPS6219267B2 (en) | ||
| JP3856355B2 (en) | Consumable electrode type AC gas shielded arc welding method and apparatus | |
| JPH0260435B2 (en) | ||
| JPH054185B2 (en) | ||
| SU1673335A1 (en) | Method of automatic arc butt welding |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |