CN212286262U - Aluminum welding electrode cap structure - Google Patents
Aluminum welding electrode cap structure Download PDFInfo
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- CN212286262U CN212286262U CN202020617694.4U CN202020617694U CN212286262U CN 212286262 U CN212286262 U CN 212286262U CN 202020617694 U CN202020617694 U CN 202020617694U CN 212286262 U CN212286262 U CN 212286262U
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- electrode cap
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- chamfer
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- electrode
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- 238000003466 welding Methods 0.000 title claims abstract description 77
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 39
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 239000000498 cooling water Substances 0.000 claims abstract description 15
- 239000004411 aluminium Substances 0.000 claims abstract description 6
- 229910000679 solder Inorganic materials 0.000 abstract description 6
- 208000037656 Respiratory Sounds Diseases 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 3
- 230000035515 penetration Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 8
- 238000007493 shaping process Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 239000010953 base metal Substances 0.000 description 2
- XTYUEDCPRIMJNG-UHFFFAOYSA-N copper zirconium Chemical compound [Cu].[Zr] XTYUEDCPRIMJNG-UHFFFAOYSA-N 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- QZLJNVMRJXHARQ-UHFFFAOYSA-N [Zr].[Cr].[Cu] Chemical compound [Zr].[Cr].[Cu] QZLJNVMRJXHARQ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model relates to an aluminium welding electrode cap structure, the electrode cap terminal surface of electrode cap is the electrode cap chamfer face that is the chamfer at cambered surface both sides face, electrode cap chamfer face lower extreme department is the electrode cap scale mark, the electrode cap is electrode cap installation terminal surface in the intermediate position of bottom, electrode cap installation terminal surface upside is electrode cap cooling water basin. Under the same circumstances of welding current and pressure the utility model discloses the electrode cap compares current electrode cap solder joint diameter and increases 31%, and the solder joint penetration increases 70%, and solder joint gas pocket and crackle are eliminated completely.
Description
Technical Field
The utility model relates to an aluminum plate welding technology field, concretely relates to structure of aluminium welding electrode cap.
Background
In the field of automobile part manufacturing, new energy automobiles have been rapidly developed, and new energy electric automobiles adopt a large number of aluminum alloy structural parts in lightweight design, and the assembly connection between aluminum alloy parts needs to be realized by resistance spot welding on aluminum plates.
In the process of welding the aluminum plate, the strength of the welding spot directly influences the firmness of the assembly connection of the components, and further influences the assembly reliability and safety of the whole vehicle, so that the welding strength and stability of the aluminum plate are improved, and the method is a target always pursued in the field of new energy part manufacturing.
At present, the structural shape of an aluminum plate welding electrode cap refers to fig. 1, and the electrode cap adopts a large end surface with a radian smaller than a plane. In the welding process of the electrode cap, the electrode cap 1 applies pressure to the upper aluminum plate 2 and the lower aluminum plate 3, and then performs electric discharge welding, please refer to fig. 2. Because the upper layer aluminum plate 2 and the lower layer aluminum plate 3 are only in a certain gap due to the stamping part, the molding hardening phenomenon is generated through stamping parts. The aluminum welding electrode cap with the large section and the small radian cannot generate an effective shaping pit in the pre-pressing process, and the pressure in unit area and the current are synchronously reduced. The welding nugget is relatively small, the welding quality is unstable, and the welding diameter is easy to be reduced or insufficient. The welding strength of the aluminum spot welding has a great relationship with the size of the shaping pit and the current density.
Therefore, the aluminum welding electrode cap structure is provided, and the two performance indexes of the welding spot nugget diameter and the metallographic phase are improved on the aspect of improving the welding spot degree of aluminum welding, so that the strength and the reliability of the welding spot are enhanced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an aluminium welding electrode cap structure, through changing electrode cap end face shape, optimizing the inside water-cooling of electrode cap. An electrode cap structure for aluminium welding is disclosed, which contains the external size and end shape of electrode cap. The top end of the electrode cap is made into an arc surface, and chamfering processing is carried out on two sides of the top end of the electrode cap until the middle lower part of the electrode cap is reached. The outer side of the middle of the electrode cap is provided with scale marks, and the bottom of the electrode cap is provided with a step hole for installation and cooling. The large-radian end face is utilized to deform the surface of the aluminum plate to form a shaping pit in the welding process, the current height is concentrated in the attribute pit during welding, the welding current density is increased, and the pressure is centered. The upper and lower plate solutions are mutually exchanged, interpenetrated, crystallized and fused under the action of pressure to form welding spots. Thereby improving the diameter of the welding spot nugget and the stability of the metallographic structure and solving the problems in the background technology.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an electrode cap structure is welded to aluminium which characterized in that: the electrode cap end face (4) of the electrode cap (1) is an electrode cap chamfer face (5) which is a chamfer at two side faces of the cambered surface, the lower end of the electrode cap chamfer face (5) is provided with an electrode cap scale mark (6), the electrode cap (1) is provided with an electrode cap mounting end face (7) at the middle position of the bottom, and the upper side of the electrode cap mounting end face (7) is provided with an electrode cap cooling water tank (8).
Furthermore, the radian of the end surface (4) of the electrode cap and the chamfered surface (5) of the electrode cap adopt symmetrical chamfers or single-side chamfers; the chamfering amount is between 13 and 16 degrees when symmetrical chamfering is adopted; when the single-side chamfer is adopted, the chamfer angle is between 24 and 29 degrees.
Further, the material selection of the electrode cap is as follows: the electrode cap adopts zirconium copper as a manufacturing material, and the conductivity of the material is improved by 11% compared with that of chromium zirconium copper. The electrode cap can effectively reduce the resistance value between the electrode cap and the aluminum plate when in use.
Further, the end face shape of the electrode cap: the working end face of the electrode cap is designed to be in a large radian with the radius of 25MM, and the end face 4 of the electrode cap forms a large arc surface. The pressure of the welding gun is utilized to form a pressed shaping pit on the surface of the aluminum plate in the welding process, so that the energy concentration of welding current in the welding process is ensured, and the contact area between the electrode cap and the aluminum plate is reduced to ensure the welding current and the welding pressure. Under the condition of pressure, the solution in the welding spot molten pool of the upper and lower two-layer plates mutually permeates to improve the strength of the welding spot.
Further, the scale lines 6 of the electrode cap: the scale marks are marked on the lower side of the electrode cap, the polishing amount of the electrode cap can be judged according to the scale marks when the electrode cap is used, the electrode cap is used to the maximum extent, and water leakage of the electrode cap in transitional use is avoided.
Further, the electrode cap cooling water tank 8: the electrode cap adopts a cooling water tank mechanism, and cooling water forms vortex in the electrode cap under the action of the cooling water tank when passing through the inside of the electrode cap, so that heat generated by welding can be taken away quickly and effectively. The cooling water tank promotes the cooling water and the electrode cap to realize sufficient heat exchange, and the electrode cap is cooled rapidly.
To sum up, owing to adopted above-mentioned technique, the beneficial effects of the utility model are that:
the utility model discloses in, through changing the electrode cap structure, adopt high conductivity material, big radian terminal surface and chamfer form. The forming of the shaping pits before welding increases the contact area between the plates. In the welding process, because a high-conductivity material is adopted, the current loss between the electrode cap and the plate reduces the heat productivity and reduces, and the effective current between the plate and the plate increases the welding spot nugget and increases. Because of the adoption of the large cambered surface end face, the plate solutions on the two sides between the electrode caps are mutually fused under pressure and impurities are discharged. After welding, the electrode cap can rapidly take away heat of the welding spot due to the action of the cooling water tank. The strength and stability of the welding spot are improved.
Drawings
FIG. 1 is a schematic view of a conventional electrode cap;
FIG. 2 is a schematic view of a welding clamp of a conventional electrode cap;
FIG. 3 is a schematic view of the electrode cap of the present invention;
FIG. 4 is a schematic view of the welding and clamping of the electrode cap of the present invention;
FIG. 5 is a schematic view of the welding, clamping and welding of the electrode cap of the present invention;
the labels in the figure are: 1. an electrode cap; 2. an upper aluminum plate; 3. a lower aluminum plate; 4. an electrode cap end face; 5. chamfering the surface of the electrode cap; 6. electrode cap scale marks; 7. an electrode cap mounting end face; 8. an electrode cap cooling water tank; 9. the electrode cap and the upper plate are shaped; 10. the electrode cap and the upper plate are shaped; 11. the upper plate and the lower plate are fused together.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise specified and limited, the terms "shaping pit", "fusion zone", "end face chamfer" and the like are to be understood in a broad sense, for example, the shaping pit may be a regular arc pit, an irregular shallow pit, or a deformed point after being stressed. Also for example, the end face chamfer may be a symmetrical chamfer or an eccentric chamfer. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific situation of the specification.
Example 1
The utility model provides an aluminum welding electrode cap structure as shown in figure 3, figure 4 and figure 5, the electrode cap end face 4 of the electrode cap 1 is the electrode cap chamfer face 5 which is chamfer at the two side faces of the cambered surface, the large radian end face 4 of the electrode cap 1 is in direct contact with the plate to form the electrode cap and the upper plate plastic surface 9; the plastic surface 10 of the electrode cap and the upper plate; the upper and lower plates are fused together in zone 11. The lower end of the electrode cap chamfer surface 5 is provided with an electrode cap scale mark 6, the middle position of the bottom of the electrode cap 1 is provided with an electrode cap mounting end surface 7, the bottom of the electrode cap is provided with a hole for assembling the electrode mounting surface 7 with a welding gun electrode rod, and the upper side of the electrode cap mounting end surface 7 is provided with an electrode cap cooling water tank 8. The low-temperature water flows back after absorbing heat through the cooling water tank. The electrode cap end face 4 is a smooth surface, and after the electrode cap end face 4 is in full contact welding with the upper-layer aluminum plate 2 and the lower-layer aluminum plate 3, the effect that the surface of a welding spot does not splash is achieved. The end face 4 of the electrode cap is a large-radian face, so that the force of a welding gun can be effectively concentrated on a plate point, and the contact area between the aluminum plate and the aluminum plate is increased. The upper end of the electrode is made into a chamfer surface 5, so that the contact area between the electrode and an aluminum plate in the welding process can be reduced, the current density and the pressure on the welding surface of the aluminum plate are further improved, the welding energy is concentrated, and the welding spot quality is improved. The electrode cap 1 is made of high-conductivity materials, so that the resistance value and the welding heat between the electrode cap and the upper plate plastic surface 9 are reduced, more energy is concentrated between plates, welding spot cracks are controlled, and the service life of the electrode cap is prolonged by 3 times.
The metallographic experiment proves that the metallographic experiment using the existing electrode cap for welding has small diameter of a welding spot nugget or no welding nugget, and has multiple pores and cracks inside. Use the utility model discloses electrode cap welded metallographic experiment welds nuclear nugget diameter grow, and inside pore and crackle-free. And comparing the two metallographic tests to obtain data in the table 1:
TABLE 1 CURRENT ELECTRODE CAP AND THE LIKE OF THE INVENTION METALLIC TEST TABLE FOR ELECTRODE CAP
The utility model discloses the electrode cap is because the terminal surface radian is big little with panel area of contact, and welding pressure and welding current density are concentrated. The electrode cap is made of conductive base metal, so that the resistance between the electrode cap and the plate is reduced, the surface heat of the plate is reduced, the energy is centered, the quality of a welding spot is improved, and the cracking and the air holes of the welding spot are avoided.
Through current electrode cap with the utility model discloses electrode cap metallographic experiment contrast, under the same condition of welding current and pressure the utility model discloses electrode cap compares current electrode cap solder joint diameter and increases 31%, and the solder joint weld penetration increases 70%, and solder joint gas pocket and crackle are eliminated completely.
In summary, the following steps: by changing the structure of the electrode cap, the welding quality and the welding stability of the aluminum spot welding can be effectively improved by adopting the large-radian end surface, the chamfer surface, the high-conductivity base metal and the cooling water tank. The welding quantity of the welding points of the electrode cap is doubled at each grinding, and the production efficiency is improved.
The utility model discloses electrode cap terminal surface adopts big cambered surface chamfer design, and then effectively reduces the area of contact of electrode cap and part with welding pressure and welding current between two parties, improves aluminum plate's atress, current density in the unit area. The electrode cap is internally provided with a cold area water tank, and cooling water forms vortex when passing through the electrode cap to increase heat energy exchange and improve the cooling effect of the electrode cap. The electrode cap adopts zirconium copper as the parent metal conductivity and is promoted, and the resistance between electrode cap and the aluminum plate descends, and the electric current of two upper and lower aluminum plates is promoted. The diameter of the nugget is increased, and the metallographic phase is prevented from cracking.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or some features may be substituted by equivalent features, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention are within the scope of the present invention.
Claims (2)
1. The utility model provides an electrode cap structure is welded to aluminium which characterized in that: the electrode cap end face (4) of the electrode cap (1) is an electrode cap chamfer face (5) which is a chamfer at two side faces of the cambered surface, the lower end of the electrode cap chamfer face (5) is provided with an electrode cap scale mark (6), the electrode cap (1) is provided with an electrode cap mounting end face (7) at the middle position of the bottom, and the upper side of the electrode cap mounting end face (7) is provided with an electrode cap cooling water tank (8).
2. The aluminum welding electrode cap structure of claim 1, wherein: the radian of the end surface (4) of the electrode cap and the chamfered surface (5) of the electrode cap adopt symmetrical chamfers or single-side chamfers; the chamfering amount is between 13 and 16 degrees when symmetrical chamfering is adopted; when the single-side chamfer is adopted, the chamfer angle is between 24 and 29 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020617694.4U CN212286262U (en) | 2020-04-23 | 2020-04-23 | Aluminum welding electrode cap structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020617694.4U CN212286262U (en) | 2020-04-23 | 2020-04-23 | Aluminum welding electrode cap structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212286262U true CN212286262U (en) | 2021-01-05 |
Family
ID=73974731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020617694.4U Expired - Fee Related CN212286262U (en) | 2020-04-23 | 2020-04-23 | Aluminum welding electrode cap structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212286262U (en) |
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2020
- 2020-04-23 CN CN202020617694.4U patent/CN212286262U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210105 |