CN85106720A - Magnetic field control pin-arc welding - Google Patents
Magnetic field control pin-arc welding Download PDFInfo
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- CN85106720A CN85106720A CN 85106720 CN85106720A CN85106720A CN 85106720 A CN85106720 A CN 85106720A CN 85106720 CN85106720 CN 85106720 CN 85106720 A CN85106720 A CN 85106720A CN 85106720 A CN85106720 A CN 85106720A
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Abstract
The method that is used for pin-arc welding, the particularly welding of heavy in section ferrous metal pin, the characteristics of this method are to have one by the coaxial coil of DC current and pin, between pin and workpiece, produce axial magnetic field, electric arc is in this magnetic field internal combustion, the effect in magnetic field is constantly moved electric arc and liquid metal, makes pin and workpiece obtain uniform heating and fusing, and larger-diameter pin can be welded with small electric stream.The advantage of this method is: power supply and control system are simplified, prevented arc blow, can be welded easy quenched materials.
Description
The method that is used for pin-arc welding, the particularly welding of heavy in section ferrous metal pin.
In the various pin welding methods, use to such an extent that be arc welding the most widely.Experience shows (1), and the arc welding pin must adopt big electric current, " firmly " standard of short duration to carry out.Along with the increase of pin diameter, electric current also must correspondingly strengthen.For example the pin of 8 millimeters of diameters is with 500 peaces, 0.25 second, 16 millimeters of diameters will with 1200 pacify, 0.8 second.This " firmly " modular working mode requires welding equipment that powerful electric current can be provided rapidly, cuts off exactly after the very brief time again then.These requirements make power supply and control system, and when welding the major diameter pin especially, therefore the complex and expensive that becomes has limited the actual possibility of major diameter pin weldering extensive use.The rapid heating and cooling of " firmly " standard also makes the material of the tendency of quenching be difficult to welding.
The trial that reduces electric current shows that the normal automatic short-circuit of electric arc is extinguished in this case, the process instability, and joint quality is inferior.Its reason is found as follows: when electric arc after igniting in pin end face somewhere, make the localized metallic fusing.The liquid metal that has melted will drop down, and the gap is shortened, as Fig. 1 a.The gap of having shortened makes electric arc more be ready to continue burning here and goes down for the existence of electric arc provides good condition.The result further melts the metal here, form big molten drop, and the metal in other place is contacted directly by electric arc not, does not melt (Fig. 1 b) basically.The uneven phenomenon of serious fusing has taken place in the pin end face, and the pin center line is departed from the molten bath on the workpiece similarly.The big grain molten drop institute's short circuit that further develops or make electric arc to be dropped down to come of this situation and extinguishing, welding process is interrupted (Fig. 1 c).Or form the but joint of incomplete fusion (Fig. 1 d) of the one side of spill-over on one side.
Improve electric current and can make electric arc that molten drop is produced bigger pressure, the molten drop liquid metal is pushed out, (Fig. 2 a) to push other places to.Arc space elongates herein, and electric arc is shifted to the short place of other places distance automatically and removed (Fig. 2 b).Constantly moving of electric arc makes whole pin end face obtain having guaranteed the quality of joint than uniform heating and fusing, also avoided making because of short circuit the possibility of arc extinction simultaneously.
The objective of the invention is to make heavy in section pin also can weld with less current, guarantee that arc burning is stable, pin and mother metal fusing are evenly abundant, and joint is solid and reliable.
Characteristics of the present invention are to have overlapped a coil (2) on pin (1) axis direction, shown in Fig. 3 a.Pass to DC current in the coil, will produce an axial constant magnetic field (4) in the air-gap between pin and workpiece (3) like this.When pin and workpiece are ferrous metal, they will become the iron core in the magnetic circuit, make gap location have the more concentrated magnetic line of force to distribute.
When having electric arc in the gap, the direction of electric current streamline can not be consistent with this place's magnetic line of force direction fully everywhere owing to electric arc, and electric arc all can be subjected to lateral thrust everywhere.When thrust direction is all identical everywhere, electric arc can be pulled to another place and go, and the position A ' that represents from origin-location A to dotted line as represented among Fig. 3 b goes.Electric arc thrust direction everywhere also may be opposite, and electric arc can produce rotation so.If the thrust size that direction is opposite is unequal, electric arc also still will be moved except rotation so.The result of all these motions impels electric arc motion constantly on the pin end face, is fixed on a place never still, even the also unlikely generation when reduced-current of the phenomenon of inhomogeneous heating of pin and workpiece and fusing.
Therefore in the liquid metal in dowel ends and molten bath, it is in full accord that the grain direction of electric current also can not be located magnetic line of force direction with this, also can constantly rotate and move as electric arc.Can not accumulate in a place, cause the short circuit of electric arc.Therefore, even arc current is less, burning still can be stablized.
Good for the junction is shaped, as other arc welding pin method, preferably adopt porcelain ring or solder flux circle with forced shaping.
The effect in magnetic field can be welded larger-diameter pin with less current.
Because electric current reduces, the minimizing of being heated of pin and workpiece, so necessary corresponding prolongation of the duration of electric current, for example for the pin of 16 millimeters of diameters original with 1200 pacify, 0.8 second, after adding magnetic field, as long as 400 peaces just can obtain stable electric arc and reliable joint fully, but current duration should extend to 3.0 seconds.
Because non-cutting time in pin welding, as clamping pin, aligning etc., considerably beyond the arcing time, so even the arc time prolonged several times, total to production efficiency in fact influence very little.
The reduction of welding current is simplified power supply, and the common welding machine that is used for the coated electrode manual electric arc welding promptly can be used as and welds the very power supply of major diameter pin.The reduction of electric current makes to cut off and becomes easily, and the prolongation of time makes the time precision of failure of current require to reduce, and it is reliable that these all make control system simplify.
The existence of axial magnetic field makes electric arc be difficult for having prevented the fusing non-uniform phenomenon that may cause therefrom because of various reasons such as workpiece remanent magnetism or wiring direction produce arc blow.
" soft " standard of little electric current long duration has been avoided the rapid heating and cooling of metal, and the material of the tendency of quenching also can be welded.To some very big materials of tendency that quenches, also can adopt the welding conditions of segmentation, the electric arc very little as first ignition current, keep the long time, workpiece and pin are heated fully, but fusing seldom, convert big electric current then to, produce fusing, form joint.
List of references:
1.H.A.Чвертко Aвтомзтическая.Cварка82.3
2.Schweissen-Schneiden 84.8 P373
3.Metals Handbook 8th Edition
Welding and Brazing P167～171
Claims (1)
- The method that is used for pin-arc welding, the particularly welding of heavy in section ferrous metal pin, electric arc burns between pin and workpiece, dowel ends fusing ， And is formed the molten bath on workpiece, through behind the certain hour, pin is pushed to the molten bath, arc extinction, failure of current, liquid metal solidification and form welding point.Feature of the present invention is: a coil coaxial with pin is arranged.By DC current, make pin and workpiece gap place produce axial magnetic field in the coil.Electric arc is in this magnetic field internal combustion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85106720A CN85106720B (en) | 1985-09-04 | 1985-09-04 | Magnetic field control pin-arc welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85106720A CN85106720B (en) | 1985-09-04 | 1985-09-04 | Magnetic field control pin-arc welding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85106720A true CN85106720A (en) | 1986-02-10 |
| CN85106720B CN85106720B (en) | 1988-02-24 |
Family
ID=4795252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85106720A Expired CN85106720B (en) | 1985-09-04 | 1985-09-04 | Magnetic field control pin-arc welding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85106720B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101468419B (en) * | 2007-12-28 | 2011-02-02 | 南京理工大学 | Induction and electrical arc composite heat source stud welding method |
| CN110026660A (en) * | 2019-03-28 | 2019-07-19 | 福尼斯智能装备(珠海)有限公司 | A kind of arcing stud Welding of equivalent magnetic field control |
| CN111922492A (en) * | 2020-08-11 | 2020-11-13 | 山东经典重工集团股份有限公司 | Magnetic field-assisted integrated hot wire submerged arc welding device |
| CN113507998A (en) * | 2019-02-27 | 2021-10-15 | 喜利得股份公司 | Stud welding method and stud welding device for welding studs to workpieces |
-
1985
- 1985-09-04 CN CN85106720A patent/CN85106720B/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101468419B (en) * | 2007-12-28 | 2011-02-02 | 南京理工大学 | Induction and electrical arc composite heat source stud welding method |
| CN113507998A (en) * | 2019-02-27 | 2021-10-15 | 喜利得股份公司 | Stud welding method and stud welding device for welding studs to workpieces |
| CN113507998B (en) * | 2019-02-27 | 2023-12-26 | 喜利得股份公司 | Stud welding method and stud welding device for welding stud to workpiece |
| CN110026660A (en) * | 2019-03-28 | 2019-07-19 | 福尼斯智能装备(珠海)有限公司 | A kind of arcing stud Welding of equivalent magnetic field control |
| CN111922492A (en) * | 2020-08-11 | 2020-11-13 | 山东经典重工集团股份有限公司 | Magnetic field-assisted integrated hot wire submerged arc welding device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN85106720B (en) | 1988-02-24 |
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| SE01 | Entry into force of request for substantive examination | ||
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| C13 | Decision | ||
| GR02 | Examined patent application | ||
| AD01 | Patent right deemed abandoned | ||
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