CN109773316A - A kind of Flash Butt Welding technique of big specification mooring cable - Google Patents
A kind of Flash Butt Welding technique of big specification mooring cable Download PDFInfo
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- CN109773316A CN109773316A CN201811498632.XA CN201811498632A CN109773316A CN 109773316 A CN109773316 A CN 109773316A CN 201811498632 A CN201811498632 A CN 201811498632A CN 109773316 A CN109773316 A CN 109773316A
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Abstract
Chain link is put among four electrodes by a kind of Flash Butt Welding technique of big specification mooring cable, when welding, and two of them left electrodes are fixed electrode, and two right electrodes are float electrode；Flash Butt Welding technique is the following steps are included: step 1；Fixed linkage；Step 2；Flash of light preheating；Step 3；Group flashing light；Step 4；Obtain banjo fixing butt jointing；Step 5；Current-on upset；Step 6；Pressure maintaining；Upset amount is set as 32-48mm, ensure that the amount of plastic deformation of connector, electrode and upset forging cylinder pressure maintaining 75-120s, connector is made to have enough resistances of deformation, prevents annular rebound from weld port being caused to crack;Welding procedure of the present invention is simple, easy to operate, ensure that temperature uniformity when mooring cable heating, effectively prevent occurring in the welding process not weld penetration, return back to top, crackle situations such as, make big specification mooring cable that there is better mechanical property；The big specification mooring cable for being 147mm-230mm suitable for diameter.
Description
Technical field
The present invention relates to the big specification moorings that a kind of field of mooring cable more particularly to a kind of diameter are 147mm-230mm
The Flash Butt Welding technique of chain.
Background technique
With the development of ocean development and marine worker industry, to mooring cable, more stringent requirements are proposed in market.Existing two is big
Trend, first is that high intensity, second is that big normalization.The former mainly passes through the raising strength of materials and achievees the purpose that proof strength,
And the latter is then to realize intensity requirement by increasing specification.And one of the critical process that Flash Butt Welding is manufactured as mooring cable,
Its effect has vital influence for the performance of final products.Therefore must be guaranteed by reasonable Flash Butt Welding technique
The strength and toughness of big specification mooring cable weld seam, makes it meet the code requirement of classification society, and it is raw to can be realized high-volume
It produces.
With the increasing of specification, temperature uniformity is reduced when mooring cable heats, and welded section is bigger, holds in the welding process
Easily occur not weld penetration, return back to top, crackle the defects of.Therefore optimal welding condition how is selected, has big specification mooring cable
There is better mechanical property, needs largely to be tested.
Summary of the invention
It is an object of the present invention to provide a kind of Flash Butt Welding techniques for the big specification mooring cable that diameter is 147mm-230mm, make
Big specification mooring cable has better mechanical property, solves the above technical problem.
In order to achieve the above technical purposes, reach above-mentioned technical requirements, the technical scheme adopted by the invention is that: it is a kind of
Chain link is put among four electrodes by the Flash Butt Welding technique of big specification mooring cable, when welding, and two of them left electrodes are solid
Fixed electrode, two right electrodes are float electrode；It is characterized by: welding procedure the following steps are included:
Step 1；Fixed linkage: by two float electrode collective effects on two fixed electrodes in left side and right side by chain link
It is fixed on welding machine, and misplaces and correct up and down to ring body；
Step 2；Flash of light preheating: left electrodes, right electrodes are connected with welding transformer secondary, after applying voltage, welding ends
The one or many rapid contacts in face, and separate rapidly, form discontinuously flash of light；
Step 3；Group flashing light: float electrode is by speed propulsion is centainly burnt, until the amount of burning, i.e. left electrodes, right electrodes
Spacing contracting amount, control terminate；The speed of burning is set as 1.4-1.8mm/s, and the amount of burning is 30-45mm；
Step 4；It obtains banjo fixing butt jointing: enough upsetting forces being applied to welding end surface, interface gaps are reduced rapidly, and lintel stops
Only explosion, while the liquid metal and oxide inclusion of end face are squeezed out, reach defined upset amount, and it is certain to generate connector area
Plastic deformation, to promote the progress of recrystallization, form common crystal grain, obtain firm banjo fixing butt jointing；The upsetting force
It is set as 14-16MPa；Upset amount is set as 32-48mm；
Step 5；Current-on upset: not powering off immediately after flash of light, and delay a period of time has a power failure in compressing process；
Step 6；Pressure maintaining: upset terminates, and electrode and upset forging cylinder pressure maintaining for a period of time, i.e. cooling time, have connector enough
Resistance of deformation prevents annular rebound from weld port being caused to crack.
Preferred: the time of current-on upset is set as 0.5-1.2s in the step five；Cooling time is set as 75-
120s。
Beneficial effects of the present invention；A kind of flashing handicraft of mooring cable, upset amount are set as 32-48mm, ensure that connector
Amount of plastic deformation, electrode and upset forging cylinder pressure maintaining 75-120s make connector have enough resistances of deformation, prevent annular rebound from making
It cracks at weld port;Welding procedure of the present invention is simple, easy to operate, ensure that temperature uniformity when mooring cable heating, effectively
Avoid in the welding process occur not weld penetration, return back to top, crackle situations such as, make big specification mooring cable have better mechanical property；
The big specification mooring cable for being 147mm-230mm suitable for diameter.
Detailed description of the invention
Fig. 1 is the fixed schematic diagram of chain link of the present invention；
Fig. 2 is the top view of Fig. 1 of the present invention；
In figure: 1. fixed electrodes；2. float electrode；3. chain link；
Horizontal direction arrow is forging force, and vertical direction arrow is clamping force.
Specific embodiment
In order to be more clear goal of the invention of the invention, technical solution and its advantageous effects, below in conjunction with attached drawing
And specific embodiment, the present invention will be described in further detail；
In the accompanying drawings: chain link 3 is put among four electrodes by a kind of Flash Butt Welding technique of big specification mooring cable, when welding,
In two left electrodes be fixed electrode 1, two right electrodes are float electrode 2；It is characterized by: welding procedure includes following
Step:
Step 1；Fixed linkage: by two 2 collective effects of float electrode on two fixed electrodes 1 in left side and right side by chain
Ring 3 is fixed on welding machine, and is misplaced and corrected up and down to ring body；
Step 2；Flash of light preheating: left electrodes, right electrodes are connected with welding transformer secondary, after applying voltage, welding ends
The one or many rapid contacts in face, and separate rapidly, form discontinuously flash of light；
Step 3；Group flashing light: float electrode is by speed propulsion is centainly burnt, until the amount of burning, i.e. left electrodes, right electrodes
Spacing contracting amount, control terminate；The speed of burning is set as 1.4-1.8mm/s, and the amount of burning is 30-45mm；
Step 4；It obtains banjo fixing butt jointing: enough upsetting forces being applied to welding end surface, interface gaps are reduced rapidly, and lintel stops
Only explosion, while the liquid metal and oxide inclusion of end face are squeezed out, reach defined upset amount, and it is certain to generate connector area
Plastic deformation, to promote the progress of recrystallization, form common crystal grain, obtain firm banjo fixing butt jointing；The upsetting force
It is set as 14-16MPa；Upset amount is set as 32-48mm；
Step 5；Current-on upset: not powering off immediately after flash of light, and delay a period of time has a power failure in compressing process；There is electric top
The time of forging is set as 0.5-1.2s；
Step 6；Pressure maintaining: upset terminates, and electrode and upset forging cylinder pressure maintaining for a period of time, i.e. cooling time, have connector enough
Resistance of deformation prevents annular rebound from weld port being caused to crack, and cooling time is set as 75-120s.
Specific implementation of the invention:, can be at two ends of weldment at the end of the selection for the amount of burning must assure that the process of burning
Guarantee homogeneous heating on face, generates enough molten metal layers, while reaching plastic deformation temperatures on certain depth, exist in this way
Good connector could be obtained when upset.High-strength and low-magnetic steel alloying element is high, and conductivity is low, and it is slow to radiate, and is glistening
It is short to terminate heat affected zone, effective plastic deformation cannot be provided, under upsetting force effect, weld bond end face sidesway forms dislocation
Phenomena such as, enough plastic deformations can be generated when in order to guarantee upset, need suitably to increase the amount of burning, and the time is burnt in extension.
When upset amount is lesser, has liquid metal residual in the interface, easily form loose, shrinkage cavity, crackle, casting
Tissue, greyness, oxide inclusion, it is lack of penetration the defects of, reduce joint mechanical property, the impact value because obtained from is lower；Top
Forging measure it is bigger than normal can squeeze out excessive plastic metal, increase the difficulty for removing connector burr, can also because of connector local laceration and
Crystallized severe bends reduce the impact toughness of connector.In view of low magnetic steel intensity is high, and heat affected area is short, and when upset deforms
Drag is big, therefore the appropriate upset length that increases has avoided the occurrence of the not firm situation of upset.
The selection of speed of welding is related to that can Flash Butt Welding process go on smoothly, and only has chosen suitable speed of welding
It just can guarantee the strong of flash of light and stablize, and obtain optimal heating effect.High-intensitive low magnetic linkage electrical and thermal conductivity is poor, therefore selects
It burns relatively lower speed.
Since big specification mooring cable section is larger, appropriate increase system pressure is needed compared to the common cable link of same specification
Power prevents the electrode generation skidding in compressing process from causing upset insufficient.
Current-on upset is in order to carry out supplementary heating to weld seam after flash of light stops, in favor of excluding liquid gold and being moulded
Sexual intercourse shape.High-intensitive low magnetic linkage stress is big, and increasing current-on upset enables weld seam sufficiently to fuse, weld seam after preventing forging force from removing
Cracking.
Case 1
Diameter is the Flash Butt Welding technique of the mooring cable of 147mm, and chain link 3 is put among four electrodes by when welding, two of them
Left electrodes are fixed electrode 1, and two right electrodes are float electrode 2；Two fixed electrodes 1 by left side and right side first
Two 2 collective effects of float electrode chain link 3 is fixed on welding machine, and to ring body up and down misplace correct；
Left electrodes, right electrodes are connected with welding transformer secondary again, after applying voltage, welding end surface is repeatedly connect rapidly
Touching, and separate rapidly, form discontinuously flash of light；Float electrode is promoted by the speed of burning of 1.4mm/s, until the amount of burning, i.e. left side
Electrode, right electrodes spacing contracting amount are 30mm, and control terminates；14MPa upsetting force is applied to welding end surface again, interface gaps are fast
Speed reduces, and lintel stops explosion, while squeezing out the liquid metal and oxide inclusion of end face, reaches the upset amount of 32mm, and make
Connector area generates certain plastic deformation, to promote the progress of recrystallization, form common crystal grain, the firm banjo fixing butt jointing of acquisition；
It is not powered off immediately after flash of light, postpones 0.5s in compressing process and have a power failure；Upset terminates, electrode and upset forging cylinder pressure maintaining 75s,
That is so that connector there are enough resistances of deformation cooling time, prevent annular rebound from weld port being caused to crack.
Conclusion: selecting the above running parameter, do not occur in the welding process not weld penetration, return back to top, crackle situations such as, make straight
Diameter is that 147mm mooring cable has better mechanical property.
Case 2
Diameter is the Flash Butt Welding technique of the mooring cable of 230mm, and chain link 3 is put among four electrodes by when welding, two of them
Left electrodes are fixed electrode 1, and two right electrodes are float electrode 2；Two fixed electrodes 1 by left side and right side first
Two 2 collective effects of float electrode chain link 3 is fixed on welding machine, and to ring body up and down misplace correct；
Left electrodes, right electrodes are connected with welding transformer secondary again, after applying voltage, welding end surface is repeatedly connect rapidly
Touching, and separate rapidly, form discontinuously flash of light；Float electrode is promoted by the speed of burning of 1.8mm/s, until the amount of burning, i.e. left side
Electrode, right electrodes spacing contracting amount are 45mm, and control terminates；16MPa upsetting force is applied to welding end surface again, interface gaps are fast
Speed reduces, and lintel stops explosion, while squeezing out the liquid metal and oxide inclusion of end face, reaches the upset amount of 48mm, and make
Connector area generates certain plastic deformation, to promote the progress of recrystallization, form common crystal grain, the firm banjo fixing butt jointing of acquisition；
It is not powered off immediately after flash of light, postpones 1.2s in compressing process and have a power failure；Upset terminates, electrode and upset forging cylinder pressure maintaining
120s, i.e. cooling time make connector have enough resistances of deformation, prevent annular rebound from weld port being caused to crack.
Conclusion: selecting the above running parameter, do not occur in the welding process not weld penetration, return back to top, crackle situations such as, make straight
The big specification mooring cable that diameter is 230mm has better mechanical property.
Above-described embodiment is only intended to clearly illustrate description made by the present invention, and does not limit the embodiments,
To those of ordinary skill in the art, other various forms of variations or change can also be made on the basis of the above description
Dynamic, there is no necessity and possibility to exhaust all the enbodiments, and the obvious variation or change thus amplified out
It is dynamic to be still in the protection scope of this invention.
Claims (2)
1. a kind of Flash Butt Welding technique of big specification mooring cable, chain link (3) is put among four electrodes by when welding, two of them
Left electrodes are fixed electrode (1), and two right electrodes are float electrode (2)；It is characterized by: welding procedure includes following step
It is rapid:
Step 1；Fixed linkage: pass through two fixed electrodes (1) in left side and two float electrode (2) collective effects on right side
Chain link (3) is fixed on welding machine, and misplaces and corrects up and down to ring body；
Step 2；Flash of light preheating: left electrodes, right electrodes are connected with welding transformer secondary, after applying voltage, welding ends
The one or many rapid contacts in face, and separate rapidly, form discontinuously flash of light；
Step 3；Group flashing light: float electrode is by speed propulsion is centainly burnt, until the amount of burning, i.e. left electrodes, right electrodes
Spacing contracting amount, control terminate；The speed of burning is set as 1.4-1.8mm/s, and the amount of burning is 30-45mm；
Step 4；It obtains banjo fixing butt jointing: enough upsetting forces being applied to welding end surface, interface gaps are reduced rapidly, and lintel stops
Only explosion, while the liquid metal and oxide inclusion of end face are squeezed out, reach defined upset amount, and it is certain to generate connector area
Plastic deformation, to promote the progress of recrystallization, form common crystal grain, obtain firm banjo fixing butt jointing；The upsetting force
It is set as 14-16MPa；Upset amount is set as 32-48mm；
Step 5；Current-on upset: not powering off immediately after flash of light, and delay a period of time has a power failure in compressing process；
Step 6；Pressure maintaining: upset terminates, and electrode and upset forging cylinder pressure maintaining for a period of time, i.e. cooling time, have connector enough
Resistance of deformation prevents annular rebound from weld port being caused to crack.
2. a kind of Flash Butt Welding technique of big specification mooring cable according to claim 1, it is characterised in that: the step
The time of current-on upset is set as 0.5-1.2s in five；Cooling time is set as 75-120s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811498632.XA CN109773316A (en) | 2018-12-08 | 2018-12-08 | A kind of Flash Butt Welding technique of big specification mooring cable |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811498632.XA CN109773316A (en) | 2018-12-08 | 2018-12-08 | A kind of Flash Butt Welding technique of big specification mooring cable |
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| CN109773316A true CN109773316A (en) | 2019-05-21 |
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ID=66495794
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113210820A (en) * | 2021-04-25 | 2021-08-06 | 成都交大焊接科技有限公司 | Flash welding method |
| CN114131163A (en) * | 2021-08-25 | 2022-03-04 | 江阴兴澄特种钢铁有限公司 | Process method for improving quality of mooring cable welded junction |
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| CN202162490U (en) * | 2010-12-27 | 2012-03-14 | 江苏亚星锚链股份有限公司 | Flash butt welding device of R5-stage mooring cable |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113210820A (en) * | 2021-04-25 | 2021-08-06 | 成都交大焊接科技有限公司 | Flash welding method |
| CN114131163A (en) * | 2021-08-25 | 2022-03-04 | 江阴兴澄特种钢铁有限公司 | Process method for improving quality of mooring cable welded junction |
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Application publication date: 20190521 |