CN106493454A - The arc manipulation method of welding operation in magnetic field environment - Google Patents
The arc manipulation method of welding operation in magnetic field environment Download PDFInfo
- Publication number
- CN106493454A CN106493454A CN201610939384.2A CN201610939384A CN106493454A CN 106493454 A CN106493454 A CN 106493454A CN 201610939384 A CN201610939384 A CN 201610939384A CN 106493454 A CN106493454 A CN 106493454A
- Authority
- CN
- China
- Prior art keywords
- welding
- arc
- magnetic field
- manipulation
- molten bath
- 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.)
- Granted
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
- B23K9/00—Arc welding or cutting
- B23K9/02—Seam welding; Backing means; Inserts
Abstract
The invention discloses a kind of impact that can reduce magnetic field to welding arc, prevents electric arc from producing the arc manipulation method of welding operation in the magnetic field environment of arc blow；Which belongs to welding production technical field in the electrolysis bath and surrounding magnetic field of chemical industry equipment.The arc manipulation method of welding operation in the magnetic field environment, and comprise the following steps：1) welding rod containing cellulose coating is selected；70V is more than using floating voltage and the DC welder with thrust function；2) weldment is connected with the positive pole of welding machine, soldering turret is connected with the negative pole of welding machine；3) push current is chosen as the higher limit of DC welder push current scope；4) welding arc shorted contacts, current interruption weldering operation arc manipulation；Current interruption weldering operation frequency is controlled in 40～50 times/min；Using the arc manipulation method of welding operation in the magnetic field environment, impact of the magnetic field to welding arc can be effectively reduced, it is therefore prevented that electric arc produces arc blow, and welding pool size is easily controlled, the tow sides shaping of weld seam is good.
Description
Technical field
The present invention relates to welding production technical field, especially a kind of magnetic field in the electrolysis bath and surrounding magnetic field of chemical industry equipment
The arc manipulation method of welding operation in environment.
Background technology
Known, welded in the environment of without magnetic field, can often be adopted following solder technology：
1、《Solder technology》05th phase in 2000, SMAW operate " basic four method ", summarise four kinds not in document
Technology and arc manipulation method with position test plate (panel) backing welding current interruption operation.Downhand welding position adopts 2 points of Breakdown Methods；Vertical position welding bit manipulation arc manipulation
When do horizontal linear re-ciprocating motion；Horizontal position welding position is punctured at molten hole after the upper and lower root face of fusing groove root using welding rod arc, time
Hook the operation arc manipulation of arc extinguishing；Overhead welding position by electric arc blowing force will the droplet transfer to mother metal when, by root top send arc manipulation behaviour
Make.Its advantage is：The bottoming current interruption maneuver of these four diverse locations, can control well backing weld seam tow sides shaping and
Reinforcement.
2、《Solder technology》The S1 phases in 2010 " face upward plate arc extinguishing capping welding rod arc welding operations method ", describe in document
During docking overhead welding plate cosmetic welding, a kind of current interruption weldering operational approach of SMAW.Molten bath with fill and lead up a layer melt run up-igniting
After electric arc, most cross direction arc manipulation of the skew lines to oval molten bath is walked, and observes molten wide and be consistent with a upper molten bath most wide end,
Then proceed to take the air line slowly to opposite side molten bath most wide end arc manipulation, fusion is good to keep the consistent rear rapid arc extinguishing of width.On one side
The starting the arc once, alternately, it is desirable to have certain arc length, it is ensured that electric arc scatters in horn-like.Its advantage is：Can control well
The reinforcement height of plate capping layer weld seam is faced upward, and welding bead is smooth, attractive in appearance, is not likely to produce undercut defect again.
Carry out in the environment for have high-intensity magnetic field magnetic material electric arc weld when, due to the effect of magnetic field force, welding arc
Normal combustion is unable to, welding quality is very poor, outward appearance cannot also shape.
In research at home and abroad, have many with regard to welding in magnetic field environment when the measures taken and method, but all
More complicated or dumb convenience, puts into practice through Site Welding, and effect is undesirable.In the magnesium electrolysis workshop of production titanium sponge, because of electricity
Current intensity in solution groove production process produces larger electromagnetic field up to 180KA in electrolysis bath and energization bus surrounding, and
Between multiple electrolysis baths and the distance between energization bus is all closer, mutual magnetic field can be superimposed, and form electrolysis bath and mother again
Around line, the size and Orientation of the magnetic field intensity of each point is all uneven, and magnetic field intensity maximum reaches 300 after testing（G）Gauss with
On.These magnetic fields can produce to welding material during arc welding and electric arc droplet transfer and have a strong impact on, conventional arc welding method
Cannot be welded, difficulty is brought to carrying out safeguarding in workshop, overhauling welding.
Content of the invention
The technical problem to be solved is to provide a kind of impact that can reduce magnetic field to welding arc, it is therefore prevented that
Electric arc produces arc blow, meets in the magnetic field environment in the environment for having magnetic field to the Site Welding operation application of magnetic metal material
The arc manipulation method of welding operation.
The technical solution adopted for the present invention to solve the technical problems is：The arc manipulation method of welding operation in magnetic field environment,
Comprise the following steps：
1）Select the welding rod containing cellulose coating；70V is more than using floating voltage and the direct current with thrust function
Welding machine；
2）Weldment is connected with the positive pole of welding machine, soldering turret is connected with the negative pole of welding machine；
3）The higher limit that push current is chosen as DC welder push current scope；
4）By upper for soldering turret folder welding rod, welding arc shorted contacts, current interruption weldering operation arc manipulation；Current interruption weldering operation frequency control exists
40～50 times/min；
When the current interruption of back cover layer is operated, welded using flap, every, the welding bead molten bath fish scale weld tabs of formation adopts zigzag arc manipulation
Method is welded, and first welding rod point is forced down after electric arc does, is returned in weld seam in the root of weld seam
Between arc extinguishing；After the completion of envelope backing weld, weld seam forms bottom welding bead；
When packed layer, the current interruption of capping layer are operated, welded using flap, every, the welding bead molten bath fish scale weld tabs of formation is adopted
Zigzag manipulation of electrode is welded, and is ignited electric arc in molten bath centre position, and the center shorted contacts molten bath of welding rod upper contact is retreaded before being flapped toward
After swinging once, arc extinguishing in the middle of molten bath is then laterally returned to.
Further, in step 4）Welded using zigzag manipulation of electrode in middle cover surface layer current interruption operation welding process
Comprise the following steps that：
Behind welding rod shorted contacts molten bath, when the center of welding rod upper contact is tiltedly swung at bevelled edge 2mm, immediately again tiltedly
Swing at the 2mm away from groove other edge, then laterally return to arc extinguishing in the middle of molten bath.
The invention has the beneficial effects as follows：The arc manipulation method of welding operation in magnetic field environment of the present invention is in step 1）In
Using cellulose covered electrode, due to the gas blowing force of cellulose covered electrode welding arc big, longitudinal transition power of electric arc compared with
Greatly, role and influence of certain electromagnetic force to the electric arc droplet transfer can be overcome；Then in step 2）With step 3）In will be by
Weldment is attached with DC welder, while being chosen to the push current that direct current is welded；Finally, while in step 4）
In take welding arc shorted contacts, current interruption weldering operation arc manipulation；Current interruption weldering operation frequency is controlled in 40～50 times/min；Back cover
When layer, packed layer, the current interruption of capping layer are operated, welded using flap, every, the welding bead molten bath fish scale weld tabs of formation adopts zigzag
The welding manner of manipulation of electrode, so as to reduce action time of the magnetic field to the electric arc droplet transfer, is so effectively further reduced
Impact of the magnetic field to welding arc, it is therefore prevented that electric arc produces arc blow, and welding pool size is easily controlled, weld seam positive and negative
Two sides shaping is good.
Description of the drawings
Fig. 1 is longitudinal measure arc manipulation schematic diagram in the embodiment of the present invention；
Fig. 2 is transverse weld arc manipulation schematic diagram in the embodiment of the present invention；
Fig. 3 is the partial enlarged drawing of A in Fig. 1；
Fig. 4 is the partial enlarged drawing of B in Fig. 2；
Indicate in figure：1- welding rods, 2- bottom welding beads, 3- fish scale weld tabs.
Specific embodiment
The present invention is further described with reference to the accompanying drawings and examples.
Described as shown in Figure 1 to Figure 4, the arc manipulation method of welding operation in magnetic field environment of the present invention is comprised the following steps：
1）Select the welding rod 1 containing cellulose coating；70V is more than using floating voltage and the direct current with thrust function
Welding machine；
2）Weldment is connected with the positive pole of welding machine, soldering turret is connected with the negative pole of welding machine；
3）The higher limit that push current is chosen as DC welder push current scope；
4）By upper for soldering turret folder welding rod 1, welding arc shorted contacts, current interruption weldering operation arc manipulation；Current interruption weldering operation frequency control
In 40～50 times/min；
When the current interruption of back cover layer is operated, welded using flap, every, the welding bead molten bath fish scale weld tabs 3 of formation is transported using zigzag
Bar method is welded, and first by 1 point of root in weld seam of welding rod, is forced down after electric arc does, is returned to weldering
Arc extinguishing in the middle of seam；After the completion of envelope backing weld, weld seam forms bottom welding bead 2；
When packed layer, the current interruption of capping layer are operated, welded using flap, every, the welding bead molten bath fish scale weld tabs 3 of formation is adopted
Welded with zigzag manipulation of electrode, ignited electric arc in molten bath centre position, retread pendulum for the center shorted contacts molten bath of 1 upper contact of welding rod
After swinging once forward, arc extinguishing in the middle of molten bath is then laterally returned to.
In step 1）The middle blowing force for selecting the welding rod 1 containing cellulose coating strengthen welding arc.Using unloaded electricity
Pressure is more than 70V and the DC welder with thrust function；Such that it is able to improve the stability of striking performance and arc burning, prevent
Only during electric arc short circuiting transfer, there is adhesion welding rod phenomenon.
In step 2）Middle weldment is connected with the positive pole of welding machine, soldering turret is connected with the negative pole of welding machine；Such that it is able to strengthen weldering
Connect the deflection and outspoken nature of electric arc.
In step 3）In, higher limit that push current is chosen as DC welder push current scope；Select larger pushing away
Power electric current helps blowing force such that it is able to increase welding arc.
In step 4）In, by upper for soldering turret folder welding rod 1, welding arc shorted contacts, current interruption weldering operation arc manipulation；Current interruption weldering operation
FREQUENCY CONTROL is in 40～50 times/min；
When particularly the current interruption of back cover layer is operated, welded using flap, every, the welding bead molten bath fish scale weld tabs 3 of formation is adopted
Zigzag manipulation of electrode is welded, and first by 1 point of root in weld seam of welding rod, is forced down after electric arc does,
Return to arc extinguishing in the middle of weld seam；After the completion of envelope backing weld, weld seam forms bottom welding bead 2；
When packed layer, the current interruption of capping layer are operated, welded using flap, every, the welding bead molten bath fish scale weld tabs 3 of formation is adopted
Welded with zigzag manipulation of electrode, ignited electric arc in molten bath centre position, retread pendulum for the center shorted contacts molten bath of 1 upper contact of welding rod
After swinging once forward, arc extinguishing in the middle of molten bath is then laterally returned to.
As shown in Figures 1 to 4, when packed layer is welded, when welding forms fish scale weld tabs 3, a starting the arc and receipts are carried out
Arc, as shown in figure 3, welding schematic diagram for longitudinal measure arc manipulation monolithic weld tabs 3, arcing point is C points, and receipts acnode is D points, from C points
Zigzag manipulation of electrode is adopted to D points.
As shown in figure 4, the welding schematic diagram of transverse weld arc manipulation monolithic weld tabs 3, arcing point is E points, and receipts acnode is F points, from E
Point adopts zigzag manipulation of electrode to F points.
Above-mentioned welding method is adopted in step 4, as in operating process, welding arc is low, electric arc is in molten bath pivot
Amplitude carries out a starting the arc and receives arc less and using during flap weldering per a piece of molten bath fish scale weld tabs 3, while current interruption weldering
Operation frequency is controlled in 40～50 times/min；So that the time of staying is short, magnetic field is reduced to the work during electric arc droplet transfer
With the time, impact of the magnetic field to welding arc can be efficiently reduced, prevent arc blow, and welding pool system easy to control in size,
Tow sides shaping is good.
In sum, in magnetic field environment of the present invention the arc manipulation method of welding operation in step 1）Middle employing cellulose
The welding rod 1 of coating, as the gas blowing force of cellulose covered electrode welding arc is big, longitudinal transition power of electric arc is larger, can be with
Overcome role and influence of certain electromagnetic force to the electric arc droplet transfer；Then in step 2）With step 3）Middle by welded part with
The positive pole of DC welder is attached, while being chosen to the push current that direct current is welded；Finally, in step 4）In take
Welding arc shorted contacts, current interruption weldering operation arc manipulation；Current interruption weldering operation frequency is controlled in 40～50 times/min；Back cover layer, filling
When layer, the current interruption of capping layer are operated, welded using flap, every, the welding bead molten bath fish scale weld tabs 3 of formation adopts zigzag manipulation of electrode
Welding manner, so as to action time of the magnetic field to the electric arc droplet transfer can be reduced, so effectively further reduce magnetic field
Impact to welding arc, it is therefore prevented that electric arc produces arc blow, and welding pool size is easily controlled, the tow sides of weld seam into
Shape is good.
In order to ensure the welding quality of weld seam, further, in step 4）Adopt in middle cover surface layer current interruption operation welding process
With comprising the following steps that zigzag manipulation of electrode is welded：
Behind 1 shorted contacts molten bath of welding rod, when the center of 1 upper contact of welding rod is tiltedly swung at bevelled edge 2mm, immediately again
Tiltedly swing at the 2mm away from groove other edge, then laterally return to arc extinguishing in the middle of molten bath.As capping layer is located at the table of weld seam
Layer, capping layer need to form preferable transition with weldment, therefore using above-mentioned welding method, enable to quality of weld seam molding
Good；The center of welding rod 1 is avoided to be too near to bevelled edge so that bevelled edge produces undercut defect, impact welding matter at high temperature
Amount.
Embodiment 1
Using the arc manipulation method of welding operation in magnetic field environment of the present invention, to carrying out magnetic material in magnetic field environment
The arc welding of material；Its specific implementation step is comprised the following steps：
1st, the welding rod 1 containing cellulose coating is selected；70V is more than using floating voltage and the direct current with thrust function
Welding machine；
2nd, weldment is connected with the positive pole of welding machine, soldering turret is connected with the negative pole of welding machine；
The 3rd, push current is chosen as the higher limit of DC welder push current scope；
4th, soldering turret 2 is pressed from both sides upper welding rod 4, welding arc shorted contacts, current interruption weldering operation arc manipulation；Current interruption weldering operation frequency control
In 40～50 times/min；
When the current interruption of back cover layer is operated, welded using flap, as flap, the welding bead molten bath of formation is per piece for welding bead shaping surface
Fish scale weld tabs 3 is welded using zigzag manipulation of electrode, first by 1 point of root in weld seam of welding rod, is forced down electric arc and is done slightly oblique front left
After right swing once, arc extinguishing in the middle of weld seam is returned to；After the completion of envelope backing weld, weld seam forms bottom welding bead 2；Packed layer current interruption is grasped
When making, welded using flap, every, the welding bead molten bath fish scale weld tabs 3 of formation is welded using zigzag manipulation of electrode, in the middle of molten bath
Ignite electric arc for position, and 1 center shorted contacts molten bath of welding rod is retreaded after being flapped toward front left and right swing once, then laterally returns in molten bath
Between arc extinguishing；Using comprising the following steps that zigzag manipulation of electrode is welded in capping layer current interruption operation welding process：
The center of 1 shorted contacts molten bath contact of welding rod is retreaded when swinging at bevelled edge 2mm, swings to immediately and tiltedly
At 2mm away from groove other edge, arc extinguishing in the middle of molten bath is then laterally returned to.
Embodiment 2, embodiment 3, comparative example 1 and comparative example 2 change direct current therein using the method in embodiment 1
Welding machine floating voltage and current interruption weldering operation frequency, the concrete parameter for changing and corresponding technique effect, are shown in Table 1；
Table 1
Note magnetic：Blow the phenomenon for referring to that partially electric arc deviates welding rod axis；Typically verified in test weld.Because cannot measure
Electric arc deviates the distance of welding rod axis, therefore typically observes by the naked eye whether electric arc deviates welding rod axis, so as to judge whether
There is magnetic blow-out inclined.Success rate refers to that welding obtains the percentage ratio of qualified products and whole welding products.
As can be seen from the above table in magnetic field environment of the present invention welding operation arc manipulation method；When DC welder zero load
When voltage is selected in 70V and more than 70V and current interruption weldering operation frequency is 40～50 times/min, be not in magnetic in welding process
Blow inclined phenomenon；Ensure that the normal weld under magnetic field environment.
Claims (2)
1. in magnetic field environment welding operation arc manipulation method, it is characterised in that comprise the following steps：
1) welding rod containing cellulose coating (1) is selected；Using floating voltage is more than 70V and the direct current with thrust function is welded
Machine；
2) weldment is connected with the positive pole of welding machine, soldering turret is connected with the negative pole of welding machine；
3) push current is chosen as the higher limit of DC welder push current scope；
4) welding arc shorted contacts, current interruption weldering operation arc manipulation；Current interruption weldering operation frequency is controlled in 40～50 times/min；
When the current interruption of back cover layer is operated, welded using flap, welding bead shaping surface is as flap, every, the welding bead molten bath fish scale of formation
Weld tabs (3) is welded using zigzag manipulation of electrode, is forced down electric arc and is done slightly oblique front left welding rod (1) point in the root of weld seam first
After right swing once, arc extinguishing in the middle of weld seam is returned to；After the completion of envelope backing weld, weld seam forms bottom welding bead (2)；
When packed layer, the current interruption of capping layer are operated, welded using flap, every, the welding bead molten bath fish scale weld tabs (3) of formation adopts Z
Font manipulation of electrode is welded, and is ignited electric arc in molten bath centre position, and welding rod (1) center shorted contacts molten bath is retreaded and is flapped toward front left and right pendulum
After moving once, arc extinguishing in the middle of molten bath is then laterally returned to.
2. in magnetic field environment as claimed in claim 1 welding operation arc manipulation method, it is characterised in that：In step 4) in capping
Using comprising the following steps that zigzag manipulation of electrode is welded in layer current interruption operation welding process：
The center of welding rod (1) shorted contacts molten bath contact is retreaded when swinging at bevelled edge 2mm, swing to immediately and tiltedly away from
At the 2mm of groove other edge, arc extinguishing in the middle of molten bath is then laterally returned to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610939384.2A CN106493454B (en) | 2016-10-25 | 2016-10-25 | The arc manipulation method of operation is welded in magnetic field environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610939384.2A CN106493454B (en) | 2016-10-25 | 2016-10-25 | The arc manipulation method of operation is welded in magnetic field environment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106493454A true CN106493454A (en) | 2017-03-15 |
| CN106493454B CN106493454B (en) | 2018-07-27 |
Family
ID=58319123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610939384.2A Expired - Fee Related CN106493454B (en) | 2016-10-25 | 2016-10-25 | The arc manipulation method of operation is welded in magnetic field environment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106493454B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108941857A (en) * | 2018-07-26 | 2018-12-07 | 中车青岛四方机车车辆股份有限公司 | A kind of MAG horizontal position welding method and technique |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2233641A1 (en) * | 1972-07-08 | 1974-01-17 | Kobe Steel Ltd | Arc welding process - oscillates electrode tip to improve penetration |
| CN2787356Y (en) * | 2005-05-19 | 2006-06-14 | 渤海船舶重工有限责任公司 | Power supply device for electromagnet for eliminating electric arc magnetic blow of austenitic welding rod |
| CN203184801U (en) * | 2013-02-28 | 2013-09-11 | 广州市长胜焊接设备实业有限公司 | Automatic thrust arc striking device of digital inversion arc welder |
| CN104203473A (en) * | 2012-03-02 | 2014-12-10 | 林肯环球股份有限公司 | Work current switching to eliminate arc blow |
| CN104334304A (en) * | 2012-04-03 | 2015-02-04 | 林肯环球股份有限公司 | Synchronized magnetic arc steering and welding |
-
2016
- 2016-10-25 CN CN201610939384.2A patent/CN106493454B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2233641A1 (en) * | 1972-07-08 | 1974-01-17 | Kobe Steel Ltd | Arc welding process - oscillates electrode tip to improve penetration |
| CN2787356Y (en) * | 2005-05-19 | 2006-06-14 | 渤海船舶重工有限责任公司 | Power supply device for electromagnet for eliminating electric arc magnetic blow of austenitic welding rod |
| CN104203473A (en) * | 2012-03-02 | 2014-12-10 | 林肯环球股份有限公司 | Work current switching to eliminate arc blow |
| CN104334304A (en) * | 2012-04-03 | 2015-02-04 | 林肯环球股份有限公司 | Synchronized magnetic arc steering and welding |
| CN203184801U (en) * | 2013-02-28 | 2013-09-11 | 广州市长胜焊接设备实业有限公司 | Automatic thrust arc striking device of digital inversion arc welder |
Non-Patent Citations (2)
| Title |
|---|
| 杨新华: "电弧焊方法中磁偏吹产生原因及防止措施", 《热加工工艺》 * |
| 耿和灿: "手工电弧焊灭弧焊运条及其在生产中的应用", 《专用汽车》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108941857A (en) * | 2018-07-26 | 2018-12-07 | 中车青岛四方机车车辆股份有限公司 | A kind of MAG horizontal position welding method and technique |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106493454B (en) | 2018-07-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105081527B (en) | A kind of vertical docking automatic soldering technique method of thin plate in 5%Ni steel | |
| CN1879999B (en) | Method of AC welding | |
| CN102151959B (en) | High-speed welding production process and device for thin-walled steel tubes | |
| CN105880808A (en) | Same-direction forming mode based forming morphology control method for GMAW material increase manufacturing | |
| CN102922150A (en) | Wire fusing method of laser liquid filling welding | |
| CN106903401A (en) | Obliquity buried arc welding method | |
| CN103008852B (en) | A kind of submerged welding process | |
| CN106312252B (en) | Overcome method of the magnetic field to arc magnetic blow | |
| CN105817737B (en) | Electrode TIG bead-welding technology | |
| CN106493454B (en) | The arc manipulation method of operation is welded in magnetic field environment | |
| CN101396755A (en) | Mixed gas welding method for light-gage welding | |
| CN104999165A (en) | Vertical down surfacing welding method capable of realizing aesthetic welding joint and low dilution rate | |
| CN202317463U (en) | Welding interface structure of auxiliary electrode and consumable electrode | |
| CN204657711U (en) | Aluminium busbar welding special narrow gap MIG welding gun | |
| CN204381627U (en) | A kind of modified can carry out the automatic welder(welding machine) of built-up welding | |
| CN115464238A (en) | Welding control method and system based on alternating current waveform control | |
| CN206084106U (en) | Electrode structure for work piece welding double -screw bolt | |
| CN209614525U (en) | The robot single-side welding double-side forming straight angle and elevation angle weld groove | |
| CN107857191A (en) | A kind of frock for the big part of duplicate rows car handling and preparation method thereof | |
| CN104613304B (en) | A kind of aluminum alloy guide rail and its welding method | |
| CN104014946B (en) | The bevel for welding structure of Z-type aluminium alloy extrusions butt weld and welding method thereof | |
| CN104227181A (en) | Double-wire-feeding welding method implemented by main electric arcs driven by auxiliary electric arcs to swing | |
| CN207326151U (en) | Wire feeder for mariages twin arc submerged arc welding | |
| CN109262120A (en) | A kind of plasma arc welding (PAW) method and device of not preheated weld thin plate tin bronze | |
| CN206012596U (en) | Passenger train side top board joint welding structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180727 Termination date: 20191025 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |