CN108747064A - Resistance projection-welding composite connecting method and its system - Google Patents
Resistance projection-welding composite connecting method and its system Download PDFInfo
- Publication number
- CN108747064A CN108747064A CN201710254358.0A CN201710254358A CN108747064A CN 108747064 A CN108747064 A CN 108747064A CN 201710254358 A CN201710254358 A CN 201710254358A CN 108747064 A CN108747064 A CN 108747064A
- Authority
- CN
- China
- Prior art keywords
- welding
- workpiece
- resistance projection
- arc
- metal hemisphere
- 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
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
- B23K28/00—Welding or cutting not covered by any of the preceding groups, e.g. electrolytic welding
- B23K28/02—Combined welding or cutting procedures or apparatus
-
- 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
- B23K11/14—Projection 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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/34—Preliminary treatment
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
A kind of resistance projection-welding composite connecting method and its system, include the following steps：1) metal hemisphere is arranged by arc-welding in a workpiece surface to be connected wherein；2) by the company of waiting for of two workpiece to be connected part between the upper/lower electrode of resistance projection-welding device, metal hemisphere is between two workpiece to be connected and between two electrodes；3) in T1In time, two electrode relative motion δ make two workpiece to be connected realize good contact at metal hemisphere to complete precompressed；4) in T2In time, electric current I is passed between two electrodes1And relative motion Δ；5) electrode position remains unchanged, and electric current I is passed between two electrodes2, and I2> I1, duration T3；6) the electric electrode current of cut-out two, in T4Pressurize cools down in time.Present invention process is simple, easy to operate, and energy-saving effect is apparent, and electrode life is improved, the softening of connector heat affected area material is reduced, the surface indentation of connected piece is significantly reduced, it is suitable for different materials connection, strength of joint significantly improves, and material surface oxidation film is washed without carrying out polishingization.
Description
Technical field
The present invention relates to a kind of technology of welding field, specifically a kind of resistance projection-welding composite connecting method and its it is
System.
Background technology
Resistance spot welding assembles connection the most main because the advantages that its is efficient, easy to automate becomes body of a motor car
Technology, however for the connection of light metal and dissimilar metal, traditional resistor spot-welding technology exists apparent insufficient：It is needed to plate before connection
Part surface film oxide carries out specially treated, to improve solderability；Common light material, such as aluminium alloy, pyroconductivity it is big, scattered
The features such as heat is fast so that must use the high current of 30kA~55kA or so, energy consumption big when welding；High current input so that copper with
Chemical reaction easily occurs between light metal and its alloy and generates adhesion, aggravates wear to electrodes, influences welding quality；Big heat when welding
The input of amount makes joint generate apparent impression, influences vehicle body beauty；The greatest differences of physico-chemical properties between dissimilar metal,
So that the two is easy to generate hard and crisp intermetallic compound and connection defect in the welding process, quality of weld joint is poor.
Invention content
The present invention is related to additional coating so that cost is higher more for the prior art, or increase ferrous alloy leads to quality
Increase, and the defects of additional coating can also increase manufacturing process complexity, proposes a kind of resistance projection-welding composite connecting method
And its system.
The present invention is achieved by the following technical solutions：
The present invention relates to a kind of resistance projection-welding composite connecting methods, include the following steps：
1) metal hemisphere is arranged by arc-welding in a workpiece surface to be connected wherein；
2) by the company of waiting for of two workpiece to be connected part between the upper/lower electrode of resistance projection-welding device, metal hemisphere is located at two
Between workpiece to be connected and between two electrodes；
3) in T1In time, two electrode relative motion δ make two workpiece to be connected be realized at metal hemisphere good to complete precompressed
Good contact；
4) in T2In time, electric current I is passed between two electrodes1And relative motion Δ；
5) electrode position remains unchanged, and electric current I is passed between two electrodes2, and I2> I1, duration T3；Or in two electricity
Pulse is passed between pole；
6) the electric electrode current of cut-out two, in T4Pressurize cools down in time.
The step 1) specifically includes following steps：
1.1) arc-welding welding gun is moved to workpiece designated position to be connected；
1.2) release guard gas, to form protective gas atmosphere；
1.3) arc-welding welding gun filler wire forms metal hemisphere in workpiece surface to be connected；
1.4) continue release guard gas to prevent metal hemisphere from aoxidizing.
The present invention relates to a kind of resistance projection-welding composite joint systems, including：Arc welding equipment, resistance projection-welding device and coordinate are fixed
Position device, wherein：Coordinate setting device is connected with arc welding equipment, and arc welding equipment receives the location information of metal hemisphere from coordinate setting device
And it is welded metal hemisphere in workpiece surface to be connected, resistance projection-welding device is connected with coordinate setting device, and resistance projection-welding device is from coordinate
Locator receives the location information of metal hemisphere to complete the connection of the projection welding between workpiece to be connected.
The arc welding equipment includes：Wire-feed motor, switch board and the arc-welding welding gun for being set to robotic arm end, wherein：It send
Silk machine is connected with arc-welding welding gun, and switch board is connected with wire-feed motor and arc-welding welding gun respectively.
Technique effect
Compared with prior art, present invention process is simple, easy to operate, use easy to spread, due to using resistance projection-welding
Principle realizes the connection of plate so that required electric current is remarkably decreased when welding, and energy-saving effect is apparent, and improves electrode life,
The introducing of metal hemisphere changes the generation form of welding heat, reduces the softening of connector heat affected area material, significantly reduces
The surface indentation of connected piece is suitable for different materials connection, and strength of joint significantly improves, and material surface oxidation film is without carrying out
Polishingization is washed.
Description of the drawings
Fig. 1 is flow diagram of the present invention；
Fig. 2 is metal hemisphere forming process schematic diagram；
Fig. 3 is workpiece connection procedure schematic diagram to be connected；
Fig. 4 is that workpiece to be connected connects sequence diagram；
Fig. 5 is Mulit-point Connection schematic diagram；
In figure：1 workpiece to be connected, 2 arc-welding welding guns, 3 welding wires, 4 metal hemisphere, 5 top electrodes, 6 times electrodes.
Specific implementation mode
As shown in Figure 1, two pieces of workpiece 1 to be connected are connected, step includes：
1) metal hemisphere 4 is arranged by arc-welding in 1 surface of workpiece to be connected wherein.As shown in Fig. 2, including walking in detail below
Suddenly：
1.1) arc-welding welding gun 2 is moved to 1 top designated position of workpiece to be connected so that the welding wire 3 in arc-welding welding gun 2 is vertical
In the surface of workpiece 1 to be connected.
1.2) release guard gas, the protective gas in gas cylinder are released, and protective atmosphere is formed below arc-welding welding gun 2
It encloses.
1.3) 2 filler wire 3 of arc-welding welding gun forms metal hemisphere 4 on 1 surface of workpiece to be connected.
1.4) continuing release guard gas prevents metal hemisphere 4 from aoxidizing, and 4 diameter D of metal hemisphere after formation is 0.5~
4mm, height H are 0.5~2.5mm.4 surface of metal hemisphere according to demand can adhesive coating, type can be but be not limited to
Type thermosetting resin sqtructural adhesive, fluid sealant, thermoplastic adhesive or foamed glue etc..
4 material of metal hemisphere can be but be not limited to Al, AlCu6Mn, AlSi3Mn, AlSi5, AlSi7Mg,
AlSi12, Al10SiCu, AlMg4.5Mn, AlMg4Si, AlMg4Cu, MgAl3, MgAl5, MgAl6 or MgAl9Zn.
2) as shown in figure 3, two workpiece 1 to be connected are positioned between the top electrode 5 of resistance projection-welding device and lower electrode 6, on
Electrode 5 and lower 6 end face of electrode distance are L0.Then, top electrode 5 and lower 6 relative motion of electrode clamp two pieces of workpiece 1 to be connected, this
When top electrode 5 and lower electrode 6 between distance be Ls.Metal hemisphere 4 is between two workpiece 1 to be connected and between two electrodes.
3) as shown in figure 4, in T1In time, two electrode relative motion δ complete precompressed, make workpiece 1 to be connected in metal hemisphere 4
Realize good contact in place.After the completion of precompressed, distance is L between top electrode 5 and lower electrode 6s', then δ=Ls-Ls'。
4) in T2In time, welding current I is passed between two electrodes1And relative motion Δ.After two electrode movement Δs, two electricity
The distance between extreme face is Lf, complete resistance projection-welding at metal hemisphere 4.
5) top electrode 5 and lower 6 position of electrode remain unchanged, and electric current I is passed between two electrodes2, and I2> I1, the duration
For T3；I1And I2Application form can be continuous, can also be multiple-pulse.In T2And T3In time, welding position heating
Fusing, and realize that elements diffusion regulates and controls with ingredient.
6) the electric electrode current of cut-out two, in T4Pressurize cools down in time.Top electrode 5 and lower electrode 6 are removed after the completion of cooling.
As shown in figure 5, two workpiece 1 to be connected are welded by multiple metal hemisphere 4, multiple pads i.e. projection welded joint is formed,
The Bock Altitude H' of metal hemisphere 4 is 0~0.3mm.
The δ ranging from 0.01~0.05mm, Δ ranging from 0.4~2.1mm.Time T1、T2、T3、T4Respectively resistance
The time required to projection welding process different phase, meet T1=(1~3) T2、T3=(3~6) T2、T4=(2~4) T2、T2=50~
100ms。
A kind of resistance projection-welding composite joint system for realizing the above method, including：Arc welding equipment, resistance projection-welding device
With coordinate setting device, wherein：Coordinate setting device is connected with arc welding equipment, and arc welding equipment receives metal hemisphere 4 from coordinate setting device
Location information and be welded metal hemisphere 4 on 1 surface of workpiece to be connected, resistance projection-welding device is connected with coordinate setting device, and resistance is convex
Welder receives the location information of metal hemisphere 4 to complete the connection of the projection welding between workpiece 1 to be connected from coordinate setting device.
The arc welding equipment includes：Wire-feed motor, switch board and the arc-welding welding gun 2 for being set to robotic arm end, wherein：It send
Silk machine is connected with arc-welding welding gun 2, and switch board is connected with wire-feed motor and arc-welding welding gun 2 respectively.
1 material of workpiece to be connected is respectively aluminium and steel, and metal hemisphere 4 is welded when on aluminium sheet, as shown in table 1, electricity
Obtained projection welded joint intensity is higher than the maximum intensity of traditional tack-weld when stream is 5kA, and amplification is up to 15.44%.And sheet when 8kA
The projection welded joint intensity of invention improves about 27.7% than traditional jointing intensity, and energy-saving effect is notable.When electric current is more than 10kA,
The performance of aluminium-steel tradition tack-weld declines obviously, and the strength of joint that the present invention obtains is not decreased obviously, intensity
It is higher than traditional tack-weld intensity, and amplification is up to 97.56%.When electric current is 11kA, cause aluminium-due to splashing when traditional spot welding
Steel cannot achieve connection, but still can get connection of the intensity higher than traditional tack-weld maximum intensity by the method for the invention and connect
Head.The surface indentation of light metal side is substantially reduced, the range of decrease is up to 25% or more.
1 aluminum steel of table connects tensile-sbear strength contrast table
As shown in table 2,1 material of workpiece to be connected is respectively aluminium and steel, and metal hemisphere 4 is welded when on steel plate,
The projection welded joint intensity that tradition spot-welding technology obtains when welding current is 5kA and 6kA is relatively low, and the method for the present invention is in same item
Gained projection welded joint intensity increases about 1.25~1.9 times, and under the intensity and traditional handicraft when 7kA up to 1.8kN or so under part
Acquired results are almost the same, and energy-saving effect is apparent.When welding current is more than or equal to 8kA, the projection welding obtained by the method for the present invention connects
Strength of joint amplification obtained by the more traditional spot welding of head intensity is and bigger with the increase amplification of electric current 30% or more.It is in electric current
When 11kA, aluminium-steel is caused to cannot achieve connection due to splashing when traditional spot welding, but the method for the invention still can get intensity height
In the jointing of traditional tack-weld maximum intensity.Substantially reduce the surface indentation of light metal side, the range of decrease up to 20% with
On.
2 steel aluminium of table connects tensile-sbear strength contrast table
As shown in table 3, two 1 materials of workpiece to be connected all are aluminium, for being connected between aluminium-aluminium light metal alloy, this hair
Projection welded joint intensity obtained by method described in bright is above the strength of joint of traditional spot-welding technology under same current.In welding current
For 7kA when, strength of joint obtained by the method for the present invention has been more than conventional point and has been welded in the strength of joint obtained under 11kA, and energy-saving effect is shown
It writes.When welding current is more than or equal to 9kA, strength of joint obtained by the more traditional spot welding of projection welded joint intensity obtained by the method for the present invention
Amplification is 30% or more, and in 11kA, strength of joint amplification is up to 51%；Strength of joint obtained by the method for the invention reaches when 17kA
To 2829.15N, amplification is up to 40.11%, and the method for the invention substantially reduces the surface indentation of base material.
3 aluminium aluminium of table connects tensile-sbear strength contrast table
Compared with prior art, present invention process is simple, easy to operate, use easy to spread, due to using resistance projection-welding
Principle realizes the connection of plate so that required electric current is remarkably decreased when welding, and energy-saving effect is apparent, and improves electrode life,
The introducing of metal hemisphere changes the generation form of welding heat, reduces the softening of connector heat affected area material, significantly reduces
The surface indentation of connected piece is suitable for different materials connection, and strength of joint significantly improves, and material surface oxidation film is without carrying out
Polishingization is washed.
Above-mentioned specific implementation can by those skilled in the art under the premise of without departing substantially from the principle of the invention and objective with difference
Mode carry out local directed complete set to it, protection scope of the present invention is subject to claims and not by above-mentioned specific implementation institute
Limit, each implementation within its scope is by the constraint of the present invention.
Claims (9)
1. a kind of resistance projection-welding composite connecting method, which is characterized in that include the following steps：
1) metal hemisphere is arranged by arc-welding in a workpiece surface to be connected wherein；
2) by the company of waiting for of two workpiece to be connected part between the upper/lower electrode of resistance projection-welding device, metal hemisphere is located at two companies of waiting for
Between workpiece and between two electrodes；
3) in T1In time, two electrode relative motion δ make two workpiece to be connected be realized at metal hemisphere and well connect to complete precompressed
It touches；
4) in T2In time, electric current I is passed between two electrodes1And relative motion Δ；
5) electrode position remains unchanged, and electric current or pulse are passed between two electrodes；
6) the electric electrode current of cut-out two, in T4Pressurize cools down in time.
2. resistance projection-welding composite connecting method according to claim 1, characterized in that the step 1) specifically include with
Lower step：
1.1) arc-welding welding gun is moved to workpiece designated position to be connected；
1.2) release guard gas, to form protective gas atmosphere；
1.3) arc-welding welding gun filler wire forms metal hemisphere in workpiece surface to be connected；
1.4) continue release guard gas to prevent metal hemisphere from aoxidizing.
3. resistance projection-welding composite connecting method according to claim 1, characterized in that half ball material of metal is adopted
With：Al,AlCu6Mn,AlSi3Mn,AlSi5,AlSi7Mg,AlSi12,Al10SiCu,AlMg4.5Mn,AlMg4Si,
AlMg4Cu, MgAl3, MgAl5, MgAl6 or MgAl9Zn.
4. resistance projection-welding composite connecting method according to claim 1, characterized in that the metal hemispherical diameter D is
0.5~4mm, height H are 0.5~2.5mm.
5. resistance projection-welding composite connecting method according to claim 1, characterized in that the metal hemisphere surface coating
There is adhesive, uses type thermosetting resin sqtructural adhesive, fluid sealant, thermoplastic adhesive or foamed glue.
6. resistance projection-welding composite connecting method according to claim 1, characterized in that the half ball warp step 6) of metal
Bock Altitude H' afterwards is 0~0.3mm.
7. resistance projection-welding composite connecting method according to claim 1, characterized in that the δ ranging from 0.01~
0.05mm, Δ ranging from 0.4~2.1mm.
8. resistance projection-welding composite connecting method according to claim 1, characterized in that the time T1、T2、T3、T4Point
T Wei not be met the time required to resistance projection-welding process different phase1=(1~3) T2、T3=(3~6) T2、T4=(2~4) T2、T2
=50~100ms.
9. a kind of resistance projection-welding composite joint system, which is characterized in that including：Arc welding equipment, resistance projection-welding device and coordinate are fixed
Position device, wherein：Coordinate setting device is connected with arc welding equipment, and arc welding equipment receives the location information of metal hemisphere from coordinate setting device
And it is welded metal hemisphere in workpiece surface to be connected, resistance projection-welding device is connected with coordinate setting device, and resistance projection-welding device is from coordinate
Locator receives the location information of metal hemisphere to complete the connection of the projection welding between workpiece to be connected；
The arc welding equipment includes：Wire-feed motor, switch board and the arc-welding welding gun for being set to robotic arm end, wherein：Wire-feed motor
It is connected with arc-welding welding gun, switch board is connected with wire-feed motor and arc-welding welding gun respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710254358.0A CN108747064A (en) | 2017-04-18 | 2017-04-18 | Resistance projection-welding composite connecting method and its system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710254358.0A CN108747064A (en) | 2017-04-18 | 2017-04-18 | Resistance projection-welding composite connecting method and its system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108747064A true CN108747064A (en) | 2018-11-06 |
Family
ID=63979996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710254358.0A Pending CN108747064A (en) | 2017-04-18 | 2017-04-18 | Resistance projection-welding composite connecting method and its system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108747064A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101234453A (en) * | 2007-01-30 | 2008-08-06 | 通用电气公司 | Projection weld and method for creating the same |
| JP2008290129A (en) * | 2007-05-25 | 2008-12-04 | Denso Corp | Method of welding metallic member |
| CN201220324Y (en) * | 2008-06-06 | 2009-04-15 | 奇瑞汽车股份有限公司 | Projection welder |
| EP2679328A1 (en) * | 2012-06-29 | 2014-01-01 | Volkswagen Aktiengesellschaft | Joining of two parts by means of a combination of electrical resistance welding and friction welding |
| CN104646818A (en) * | 2013-11-20 | 2015-05-27 | 上海拖拉机内燃机有限公司 | Pressure welding process for lowering welding spatter |
| CN104907715A (en) * | 2015-06-25 | 2015-09-16 | 大连理工大学 | Ultrasonic wave-electrical resistance composite welding method |
| CN105033421A (en) * | 2015-03-23 | 2015-11-11 | 上海交通大学 | Arc weld bonding connecting system and method for dissimilar metals |
| CN105269138A (en) * | 2014-06-24 | 2016-01-27 | 东风商用车有限公司 | Novel metal welding method |
| CN105478978A (en) * | 2014-09-18 | 2016-04-13 | 上海宝井钢材加工配送有限公司 | High-fusion-depth welding process of projection welding nut |
-
2017
- 2017-04-18 CN CN201710254358.0A patent/CN108747064A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101234453A (en) * | 2007-01-30 | 2008-08-06 | 通用电气公司 | Projection weld and method for creating the same |
| JP2008290129A (en) * | 2007-05-25 | 2008-12-04 | Denso Corp | Method of welding metallic member |
| CN201220324Y (en) * | 2008-06-06 | 2009-04-15 | 奇瑞汽车股份有限公司 | Projection welder |
| EP2679328A1 (en) * | 2012-06-29 | 2014-01-01 | Volkswagen Aktiengesellschaft | Joining of two parts by means of a combination of electrical resistance welding and friction welding |
| CN104646818A (en) * | 2013-11-20 | 2015-05-27 | 上海拖拉机内燃机有限公司 | Pressure welding process for lowering welding spatter |
| CN105269138A (en) * | 2014-06-24 | 2016-01-27 | 东风商用车有限公司 | Novel metal welding method |
| CN105478978A (en) * | 2014-09-18 | 2016-04-13 | 上海宝井钢材加工配送有限公司 | High-fusion-depth welding process of projection welding nut |
| CN105033421A (en) * | 2015-03-23 | 2015-11-11 | 上海交通大学 | Arc weld bonding connecting system and method for dissimilar metals |
| CN104907715A (en) * | 2015-06-25 | 2015-09-16 | 大连理工大学 | Ultrasonic wave-electrical resistance composite welding method |
Non-Patent Citations (3)
| Title |
|---|
| 杨文杰等: "《金属材料热加工设备》", 31 August 2007, 哈尔滨工业大学出版社 * |
| 杨文杰等: "《金属热加工设备及工艺》", 30 June 2014, 哈尔滨工业大学出版社 * |
| 程辉明等: "《先进电子制造技术》", 31 July 2008, 国防工业出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101856757B (en) | Powder medium diffusion reaction resistance soldering method of aluminum alloy | |
| US20170297134A1 (en) | Resistance spot welding aluminum to steel using preplaced metallurgical additives | |
| CA2617767C (en) | Method for arc or beam brazing/welding of workpieces of identical or different metals or metal alloys with additional materials of sn base alloys; sn base alloy wire | |
| CN109396694A (en) | The workpiece and preparation method thereof for welding for threaded fastener and being positioned by light beam | |
| US6646221B2 (en) | Method for repairing resistance spot welds in aluminum sheet materials | |
| CN103302390B (en) | The resistance spot welding process of the nugget shrinkage cavity defect of dual-phase steel plate can be eliminated | |
| CN109048021A (en) | A kind of band pole weldering welding procedure suitable for multi-layered sheet | |
| CN112475808B (en) | Process suitable for industrial production of aluminum alloy/steel composite structural member and application | |
| CN103521866B (en) | The copper wire lead resistance brazing technology method of the controlled single-side double-point of a kind of welding temperature | |
| CN101774062B (en) | Lamination composite material and stainless steel argon arc melt-brazing method | |
| CN108747064A (en) | Resistance projection-welding composite connecting method and its system | |
| CN210587737U (en) | Plasma and MIG composite spot welding's compound spot welding device of integration | |
| TWI577489B (en) | Method for arc stud welding | |
| CN108237284B (en) | Welding method of silver-molybdenum electrode | |
| CN108237278B (en) | welding method of copper-molybdenum electrode | |
| CN201720586U (en) | Movable type integrated gas welding equipment | |
| CN115194278A (en) | Sealing brazing method and brazing system | |
| CN108723534A (en) | A kind of molten Welding method of electrolytic aluminium cathode steel-aluminium | |
| CN106141482B (en) | Spot welding part structure coated with conductive coating and manufacturing method thereof | |
| CN205834520U (en) | Spot welding part structure coated with conductive coating | |
| Williams | Resistance spot welding | |
| CN100409991C (en) | Welding wire and lead frame spot welding method | |
| CN101890559A (en) | Movable integrated gas welding equipment | |
| TWI601593B (en) | Titanium dioxide-based ignition flux for arc stud welding | |
| JP2009090314A (en) | Welding gun |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181106 |