CN115138956A - Steel core composite electrode for high-elasticity alloy and spot welding process thereof - Google Patents
Steel core composite electrode for high-elasticity alloy and spot welding process thereof Download PDFInfo
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- CN115138956A CN115138956A CN202210858753.0A CN202210858753A CN115138956A CN 115138956 A CN115138956 A CN 115138956A CN 202210858753 A CN202210858753 A CN 202210858753A CN 115138956 A CN115138956 A CN 115138956A
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- steel core
- electrode
- composite electrode
- spot welding
- conductive
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- 238000003466 welding Methods 0.000 title claims abstract description 62
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 60
- 239000010959 steel Substances 0.000 title claims abstract description 60
- 239000002131 composite material Substances 0.000 title claims abstract description 55
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 30
- 239000000956 alloy Substances 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000008569 process Effects 0.000 title claims abstract description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 34
- 229910052802 copper Inorganic materials 0.000 claims abstract description 34
- 239000010949 copper Substances 0.000 claims abstract description 34
- SBYXRAKIOMOBFF-UHFFFAOYSA-N copper tungsten Chemical compound [Cu].[W] SBYXRAKIOMOBFF-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 4
- 229910000601 superalloy Inorganic materials 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 abstract description 10
- 230000009471 action Effects 0.000 abstract description 8
- 230000006835 compression Effects 0.000 abstract description 5
- 238000007906 compression Methods 0.000 abstract description 5
- 241000227287 Elliottia pyroliflora Species 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 2
- 239000007772 electrode material Substances 0.000 description 2
- 229910001080 W alloy Inorganic materials 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Images
Classifications
-
- 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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/10—Spot welding; Stitch welding
- B23K11/11—Spot welding
- B23K11/115—Spot welding by means of two electrodes placed opposite one another on both sides of the welded parts
-
- 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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/30—Features relating to electrodes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Resistance Welding (AREA)
Abstract
The invention relates to a steel core composite electrode for high-elasticity alloy and a spot welding process thereof, wherein the steel core composite electrode comprises a support body and a conductive electrode, the support body is arranged in the conductive electrode and is used for supporting the conductive electrode, the support body is made of steel, and the conductive electrode is made of tungsten copper; comprises a copper sheet and a lower electrode, wherein the copper sheet is in contact connection with the composite electrode. The invention has the beneficial effects that: 1. the steel core composite electrode structure is designed in such a way that the conductive copper columns are sleeved outside the steel core, the inner steel core plays a role in bearing axial compression force, and the peripheral copper sleeve plays a role in conducting high current; 2. under the action of shunting of the peripheral copper bush, the steel core has higher resistance, the passing current is extremely low, the steel core basically has no creep deformation at low temperature in the using process, and high-pressure and high-current spot welding is realized; 3. during spot welding, the copper sheet is arranged on the head of the composite electrode, so that current during welding forms a loop through the copper sheet-conductive electrode, the steel core is not conductive, the current is stable, the size of a spot welding nugget is stable, and the welding strength is stable.
Description
Technical Field
The invention relates to the technical field of spot welding, in particular to a steel core composite electrode for a high-elasticity alloy.
Background
The spot welding is to compress two layers of metal plates through an upper electrode and a lower electrode, transient current flows through the plate compressing part through the electrodes, and the plates are indirectly contacted with a resistor to generate heat, so that a molten pool is generated and rapidly cooled, a nugget is formed, and the welding of the two layers of plates is realized. In the process, the resistance of the electrode can generate great heat, the temperature of the contact point of the electrode is increased sharply, and the strength of the front end of the electrode is reduced. When the small-diameter welding spot high-elasticity alloy is subjected to spot welding, the required clamping force is large, the electrode end head bears large pressure due to high alloy strength, high melting point and good elasticity, and the deformation is easy to occur at a high temperature state, so that the current density is rapidly reduced, and the fault welding fault is caused.
The existing spot welding electrodes mainly comprise a spot welding electrode made of tungsten-copper composite materials and a spot welding electrode with an electrode cap.
The spot welding electrode made of a composite material is a spot welding electrode formed by combining two or more metal materials. The electrode material is still soft material, is easy to deform after being heated, and has low strength, poor wear resistance and short service life.
The spot welding electrode with the electrode cap is manufactured by adding the electrode cap, which is made of a sintered tungsten alloy, to the contact end of the electrode tip on the basis of the original electrode, and is configured to enable a reduction in welding current and thus a longer service life. The electrode has small welding current, low electric conductivity and thermal conductivity, and poor quality when spot welding the high-temperature alloy plate.
The two electrodes have the problems of short service life and poor spot welding quality when spot welding the high-temperature alloy plate, and are not suitable for the requirement of alloy spot welding electrodes of high-elasticity high-temperature alloy.
In order to avoid the above problems, it is desired to provide an electrode capable of withstanding a large pressing force without high-temperature plastic deformation so as to realize stable spot welding.
Disclosure of Invention
The embodiment of the invention provides a steel core composite electrode for a high-elasticity alloy and a spot welding process thereof, which can solve the problems in the related art.
On one hand, the embodiment of the invention provides a steel core composite electrode for high-elasticity alloy,
the support body is arranged in the conductive electrode and used for supporting the conductive electrode.
In some embodiments, the support body is in the shape of a round head bolt.
In some embodiments, the support body is made of steel.
In some embodiments, the conductive electrode material is tungsten copper.
In some embodiments, the conductive electrode is hollow inside.
In one aspect, an embodiment of the present invention provides a steel core composite electrode spot welding device, including the composite electrode described above.
In some embodiments, a copper sheet and a lower electrode are included, the copper sheet being in contact connection with the composite electrode.
In some embodiments, the sheet is a high-elasticity superalloy sheet.
In one aspect, an embodiment of the invention provides a steel core composite electrode spot welding process, which comprises the following steps:
s1: when a high-elasticity high-temperature alloy plate needs to be welded, arranging a copper sheet at the head of the composite electrode;
s2: placing a high-elasticity high-temperature alloy plate to be welded between the copper sheet and the lower electrode;
s3: and applying axial pressure to the support body of the composite electrode, pressing the high-elasticity high-temperature alloy plate by the composite electrode, starting electrifying and welding.
The technical scheme provided by the invention has the beneficial effects that: 1. the spot welding axial compression function and the large current pass function are decoupled, the steel core composite electrode structure with the conductive copper column sleeved outside the steel core is designed, the inner steel core plays a role in bearing the axial compression force, and the peripheral copper sleeve plays a role in large current conduction; 2. under the action of shunting of the peripheral copper bush, the steel core has higher resistance, the passing current is extremely small, and the steel core basically has no creep deformation at low temperature in the use process, so that high-pressure tight force and high-current spot welding are stably realized; 3. the internal support body is made of steel, so that the electrode has the advantages of high support strength, good wear resistance and long service life; 4. during spot welding, the copper sheet is arranged on the head of the composite electrode, so that current during welding forms a loop through the copper sheet and the conductive electrode, the steel core is non-conductive, the current is stable, the size stability of a spot welding nugget is enhanced, and the welding strength is ensured.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a cross-sectional view of a steel core composite electrode for a high elastic alloy according to the present invention;
FIG. 2 is a bottom view of a steel core composite electrode for a high elastic alloy according to the present invention;
FIG. 3 is a schematic view of a steel core composite electrode spot welding apparatus according to the present invention;
FIG. 4 is a flow chart of a spot welding process of a steel core composite electrode according to the present invention.
In the figure: 1. a support body; 2. a conductive electrode; 11. a composite electrode; 12. copper sheet; 13. a lower electrode; 14. and (5) a plate material.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Referring to fig. 1 to 2, an embodiment of the present invention provides a steel core composite electrode for a high elastic alloy, including a supporting body 1 and a conductive electrode 2, where the supporting body 1 is disposed inside the conductive electrode 2 and is used to support the conductive electrode 2.
Optionally, the support body 1 is in the shape of an outer round bolt.
Optionally, the support body is made of steel.
Through designing into support body 1 excircle head bolt shape for the welded head end diameter is less than the tail end diameter who bears pressure, can make the tail end bear the pressure of bigger area, makes head end pressure concentrate more, thereby makes the welding more firm.
Optionally, the conductive electrode 2 is made of tungsten copper.
Alternatively, the conductive electrode 2 is hollow inside.
The conductive electrode 2 is hollow, and tungsten copper is made of the material, so that the conductive electrode can be matched with a steel core of the support body 1, a peripheral copper sleeve plays a role in conducting high current, and high-pressure tightening force and high-current spot welding are stably achieved.
The material of supporter 1 is the steel, and conductive electrode 2 material is the tungsten copper, through compressing tightly function and the function decoupling zero of heavy current through the spot welding axial with traditional, designs into the steel core composite electrode structure of the electrically conductive copper post of steel core overcoat, and inside steel core plays and bears the effect of axial clamping force, and peripheral copper sheathing plays the electrically conductive effect of heavy current. Meanwhile, under the action of shunting of the peripheral copper sleeve, the steel core has larger resistance, so that the passing current is extremely small, the temperature of the steel core is low in the using process, and basically, creep deformation does not exist, and high-tension and large-current spot welding is stably realized.
Referring to fig. 3, an embodiment of the present invention provides a steel core composite electrode spot welding device, including the composite electrode 11 described above.
Optionally, the composite electrode comprises a copper sheet 12 and a lower electrode 13, wherein the copper sheet 12 is in contact connection with the composite electrode 11.
Optionally, a plate 14 is arranged between the copper sheet 12 and the lower electrode 13.
Optionally, the plate 14 is a high-elasticity high-temperature alloy plate.
The spot welding is carried out by padding a copper sheet 12 at the head end of the composite electrode 11 and clamping two plates 14 to be welded together with the lower electrode 13. When a large welding current flows through the composite electrode 11, the resistance of the steel core is large and the current of the steel core is extremely low under the shunting action of the peripheral conductive electrode 2, so that the steel core has the advantages of low temperature and long service life, and meanwhile, when the welding is repeated, the current is stable and the welding quality is good.
Referring to fig. 4, an embodiment of the present invention provides a steel core composite electrode spot welding process, including the following steps:
s1: when a high-elasticity high-temperature alloy plate needs to be welded, arranging a copper sheet at the head of the composite electrode;
s2: placing a high-elasticity high-temperature alloy plate to be welded between the copper sheet and the lower electrode;
s3: and applying axial pressure to the support body of the composite electrode, pressing the high-elasticity high-temperature alloy plate by the composite electrode, starting electrifying and welding.
The invention has the beneficial effects that: 1. the spot welding axial compression function and the large current pass function are decoupled, the steel core composite electrode structure with the conductive copper column sleeved outside the steel core is designed, the inner steel core plays a role in bearing the axial compression force, and the peripheral copper sleeve plays a role in large current conduction; 2. under the action of shunting of the peripheral copper bush, the steel core has higher resistance, the passing current is extremely low, and the steel core basically has no creep deformation at low temperature in the using process, so that high-pressure and high-current spot welding is stably realized; 3. the internal support body is made of steel, so that the electrode has the advantages of high support strength, good wear resistance and long service life; 4. during spot welding, the copper sheet is arranged on the head of the composite electrode, so that current during welding forms a loop through the copper sheet and the conductive electrode, the steel core is not conductive, the current is stable, the size stability of a spot welding nugget is enhanced, and the welding strength is ensured.
In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element 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. Unless expressly stated or limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly and encompass, for example, both fixed and removable connections as well as integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The steel core composite electrode for the high-elasticity alloy is characterized by comprising a supporting body (1) and a conductive electrode (2), wherein the supporting body (1) is arranged in the conductive electrode (2) and is used for supporting the conductive electrode (2).
2. A steel core composite electrode for high elastic alloy, according to claim 1, wherein said supporting body (1) is in the form of an external round head bolt.
3. Steel core composite electrode for high elastic alloys according to claim 1, characterized in that said supporting body (1) is made of steel.
4. A steel core composite electrode for high elastic alloy according to claim 1, wherein said conductive electrode (2) is made of tungsten copper.
5. Steel core composite electrode for superelastic alloys according to claim 1, wherein said conductive electrode (2) has a hollow interior.
6. Steel core composite electrode spot welding device, comprising a composite electrode (11) according to any one of claims 1 to 7.
7. Steel core composite electrode spot welding device according to claim 6, comprising a copper sheet (12) and a lower electrode (13), said copper sheet (12) being in contact connection with said composite electrode (11).
8. Steel core composite electrode spot welding device according to claim 6, wherein a plate (14) is arranged between said copper sheet (12) and said lower electrode (13).
9. Steel core composite electrode spot welding device according to claim 8, wherein said sheet material (14) is a high elastic superalloy sheet material.
10. A spot welding process for a steel core composite electrode comprises the following steps:
s1: when a high-elasticity high-temperature alloy plate needs to be welded, arranging a copper sheet at the head of the composite electrode;
s2: placing a high-elasticity high-temperature alloy plate to be welded between the copper sheet and the lower electrode;
s3: and applying axial pressure to the support body of the composite electrode, pressing the high-elasticity high-temperature alloy plate by the composite electrode, starting electrifying and welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210858753.0A CN115138956A (en) | 2022-07-20 | 2022-07-20 | Steel core composite electrode for high-elasticity alloy and spot welding process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210858753.0A CN115138956A (en) | 2022-07-20 | 2022-07-20 | Steel core composite electrode for high-elasticity alloy and spot welding process thereof |
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| CN115138956A true CN115138956A (en) | 2022-10-04 |
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| CN202210858753.0A Pending CN115138956A (en) | 2022-07-20 | 2022-07-20 | Steel core composite electrode for high-elasticity alloy and spot welding process thereof |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55109584A (en) * | 1979-02-15 | 1980-08-23 | Fuji Heavy Ind Ltd | Electrode for spot welding |
| GB0002295D0 (en) * | 2000-02-02 | 2000-03-22 | Ford Motor Co | Improved resistance welding electrode |
| CN102672332A (en) * | 2012-05-15 | 2012-09-19 | 上海交通大学 | Method for prolonging service life of resistance spot welding electrode of galvanized thin steel plate |
| CN103350277A (en) * | 2013-07-22 | 2013-10-16 | 哈尔滨凌云汽车零部件有限公司 | Combination electrode for welding gun for welding vehicle door galvanized sheet |
| CN109719379A (en) * | 2019-01-17 | 2019-05-07 | 大连理工大学 | A kind of ceramic core annular copper electrode and its resistance spot welding method |
| CN110666323A (en) * | 2019-10-31 | 2020-01-10 | 上海云飞工贸发展有限公司 | Combined electrode suitable for resistance welding |
| CN110814497A (en) * | 2019-11-22 | 2020-02-21 | 吉林大学 | Film insulation core non-conductive electrode cap and annular nugget resistance spot welding method |
| CN111014923A (en) * | 2020-02-18 | 2020-04-17 | 吉林大学 | Resistance spot welding device and method for unequal-thickness plates |
| CN211135895U (en) * | 2019-10-31 | 2020-07-31 | 上海云飞工贸发展有限公司 | Combined electrode suitable for resistance welding |
| CN213135405U (en) * | 2020-08-09 | 2021-05-07 | 湖北超卓航空科技股份有限公司 | Spot welding electrode structure |
| CN215280338U (en) * | 2021-04-28 | 2021-12-24 | 广东微电新能源有限公司 | Spot welding structure and battery |
-
2022
- 2022-07-20 CN CN202210858753.0A patent/CN115138956A/en active Pending
Patent Citations (11)
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|---|---|---|---|---|
| JPS55109584A (en) * | 1979-02-15 | 1980-08-23 | Fuji Heavy Ind Ltd | Electrode for spot welding |
| GB0002295D0 (en) * | 2000-02-02 | 2000-03-22 | Ford Motor Co | Improved resistance welding electrode |
| CN102672332A (en) * | 2012-05-15 | 2012-09-19 | 上海交通大学 | Method for prolonging service life of resistance spot welding electrode of galvanized thin steel plate |
| CN103350277A (en) * | 2013-07-22 | 2013-10-16 | 哈尔滨凌云汽车零部件有限公司 | Combination electrode for welding gun for welding vehicle door galvanized sheet |
| CN109719379A (en) * | 2019-01-17 | 2019-05-07 | 大连理工大学 | A kind of ceramic core annular copper electrode and its resistance spot welding method |
| CN110666323A (en) * | 2019-10-31 | 2020-01-10 | 上海云飞工贸发展有限公司 | Combined electrode suitable for resistance welding |
| CN211135895U (en) * | 2019-10-31 | 2020-07-31 | 上海云飞工贸发展有限公司 | Combined electrode suitable for resistance welding |
| CN110814497A (en) * | 2019-11-22 | 2020-02-21 | 吉林大学 | Film insulation core non-conductive electrode cap and annular nugget resistance spot welding method |
| CN111014923A (en) * | 2020-02-18 | 2020-04-17 | 吉林大学 | Resistance spot welding device and method for unequal-thickness plates |
| CN213135405U (en) * | 2020-08-09 | 2021-05-07 | 湖北超卓航空科技股份有限公司 | Spot welding electrode structure |
| CN215280338U (en) * | 2021-04-28 | 2021-12-24 | 广东微电新能源有限公司 | Spot welding structure and battery |
Non-Patent Citations (1)
| Title |
|---|
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