CN106735805B - A method of solid State Welding is carried out using contact resistance - Google Patents
A method of solid State Welding is carried out using contact resistance Download PDFInfo
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- CN106735805B CN106735805B CN201611199016.5A CN201611199016A CN106735805B CN 106735805 B CN106735805 B CN 106735805B CN 201611199016 A CN201611199016 A CN 201611199016A CN 106735805 B CN106735805 B CN 106735805B
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- 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
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Abstract
The present invention provides a kind of method for carrying out solid State Welding using contact resistance, it fixes welding both ends face contact, and keeps the constant contact stress of 0.1 ~ 100 MPa, and both ends are powered, 1 ~ 100A/mm2 of current density range generates heat welding end surface using contact resistance；After welding end surface temperature increases, both ends of the surface distance is pulled open 0.1 ~ 2mm by separated contact surfaces, is generated electric arc and is continued 1 ~ 10 second；Both ends of the surface are compressed at once after sustained arc, the compression deformation of profile controls the turn-off current after 0.1 ~ 5mm, compression, persistently keeps 1 ~ 20 second time, completes welding.To realize welding quality and the double shield to seam organization, matrix consumption control, meet strong mechanical performance, the requirement of high dimensional accuracy welded unit.The invention belongs to welding technology fields.
Description
Technical field
The present invention relates to a kind of solid welding methods, belong to welding technology field.
Background technique
The welding of metal material can be divided into fusion welding and two kinds of solid-state welding from appearance of weld feature, and wherein fusion welding is in weld seam
Place's metal can liquefy, and form molten bath, complete welding after liquefaction metal is cooling, due to there is the cooling of liquefaction metal,
Such welded seam is as cast condition arborescent structure, is differed greatly with matrix, uniformity is poor, such as argon arc welding, arc welding, acetylene
Flame welding etc., some even need that solder is added, and cause its structural constituent all in uneven state.
And solid State Welding is a kind of method under solid states by heating welding end surface with completing welding by pressure,
Since weld seam does not liquefy metal, there are many advantages in structure property for opposite welding technology.It is common in solid State Welding to be
Friction welding (FW), flash welding, electric resistance welding, this kind of welding do not need solder generally, and weld seam without liquefaction metal, is organized basic with ingredient substantially
It is consistent with matrix, it is used in some high performance requirements welded units at present.
Wherein: (1) friction welding is more demanding to equipment dynamic, relatively complicated, is of limited application.(2) it glistens
Welding can constantly glisten in its heating process due to forming high energy arc, generation explosion in end face and consume basis material,
On the one hand lead to the waste of valuable basis material, on the other hand its explosion consumption is more difficult to control, therefore its dimension control
It is more difficult.(3) electric resistance welding be it is a kind of both ends are compressed after be powered, utilize the resistance heat production of matrix, then complete welding.But electricity
There are two important drawbacks for welding resistance: on the one hand, since welding requirements heat is higher, after energization, the material among holding electrode will all
It is heated, it is wider which results in heat affected areas, and low performance area is obvious；On the other hand, since welding end surface is in impaction state,
Some dirts of welding end surface during heating, the more difficult exclusion of metal oxide formed in heating process, therefore be easy
The interface of segmentation matrix is formed in commissure, causes postwelding mechanical property poor.
Therefore, in order to meet the welding requirements of high quality, it is necessary to develop it is a kind of have the advantages that the quality of solid State Welding, again
The technical solution achieved effective control can be consumed to seam organization, matrix.Meet strong mechanical performance, high dimensional accuracy welded unit
Requirement.
Summary of the invention
It is an object of the invention to: a kind of method for carrying out solid State Welding using contact resistance is provided, to realize to welding
Quality and the double shield controlled seam organization, matrix consumption, meet strong mechanical performance, high dimensional accuracy welded unit is wanted
It asks.
To solve the above problems, such a method for carrying out solid State Welding using contact resistance of proposed adoption:
According to the principle and requirement of solid State Welding, enough heats are on the one hand needed, on the one hand need to have in welding end surface
Certain strain occurs for certain pressure.Welded unit both sides are clamped, welding end surface contact close to each other passes through stress sensing
Device, the size of proof stress guarantee its contact condition, generally contact compression according to different materials and are maintained at 0.1 ~ 100 MPa
Range is not required to allow component both ends to compress, is then electrified to, this scheme to electric current without selection, can indirect current or direct current, electric current
1 ~ 100A/mm of density range2.The position that Member Welding end face contacts with each other is begun to warm up under the action of contact resistance, due to
End face contact resistance is big, therefore will appear contact face and reach higher temperature first, avoids the structure between two holding electrodes
Part is all heated to very high temperature simultaneously, and heat affected area is caused to become larger.
Electric current is 5 ~ 120 seconds by time range, after rising to high temperature with temperature, sets 0 for contact stress, i.e., by two
End face distance controlling is in 0.1 ~ 2mm range spacing, and at this time due to not powering off, air is ionized to form electricity in gap between both ends of the surface
Arc, high arc temperature will act at end face, and the oxide for causing original end face to be formed at high temperature is by burning-off, and by electric-arc gasification
Metallic vapour can form a steam protection layer to end face to prevent from aoxidizing, and will weld at once after lasting generation electric arc 1 ~ 10 second
Component both ends of the surface force together.Since metal stresses and strain have relevance, pressure size can be controlled by deflection, pressed
Compression deformation amount turns off electric current according to the control of welded unit difference after 0.1 ~ 5mm range, compression, is kept for 1 ~ 20 second time be
Can relaxation pressure, complete welding.
Compared with prior art, the present invention reduces heat affected area range, passes through control member by control heating interval
End face distance；Forming electric arc realizes the cleaning to welding end surface；By controlling compression deformation, realize to weldment size
Accurately control.
Detailed description of the invention
Fig. 1 is the weld seam metallographic microscope of φ 8mm nickel alloy bar welding.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below invention will be made further to retouch in detail
It states.
Embodiment 1:
The welding of φ 8mm nickel alloy bar
Bar is clamped respectively on the electrode, the opposite compression for keeping 1MPa passes through electric current, about 10A/mm2, keeping
After heating about 20 seconds, both ends are separated, are generated electric arc about 3 seconds or so, then be tightly pressed together, control deformation forms weldering in 2mm
Scar, completes welding, and the metallographic of weld seam is significantly plastically deformed trace as shown in Figure 1, wherein having, is equi-axed crystal, but does not have
As-cast structure.
The welding of 2: φ 10mm aluminium alloy bar of embodiment
Bar is clamped respectively on the electrode, the opposite compression for remaining less than 3MPa, by electric current, about 3A/mm2,
After keeping heating about 5 seconds, both ends are separated, are generated electric arc about 2 seconds or so, then be tightly pressed together, control deformation is in 1mm, then
It is compressed 5 seconds after power-off, forms crator, complete welding.
Claims (2)
1. a kind of method for carrying out solid State Welding using contact resistance, which is characterized in that steps are as follows:
Two end in contact of welded unit is fixed, and keeps the constant contact stress of 0.1 ~ 100 MPa, both ends are powered, current density
1 ~ 100A/mm of range2, heat welded unit both ends are generated using contact resistance；
After welded unit both ends temperature increases, both ends of the surface distance is pulled open 0.1 ~ 2mm by separated contact surfaces, so as to intermediate air electricity
From generation electric arc continues 1 ~ 10 second, to burn up intermediate oxide layer；
After burning up intermediate oxide layer, quickly both ends of the surface are compressed during electric arc continues, the compression deformation of profile is controlled 0.1
~ 5mm, turn-off current after compression persistently keep 1 ~ 20 second time, complete welding.
2. a kind of method for carrying out solid State Welding using contact resistance according to claim 1, it is characterised in that: welded unit
Both ends are persistently powered 5 ~ 120 seconds under the state that is kept in contact, and then separated contact surfaces generate electric arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611199016.5A CN106735805B (en) | 2016-12-22 | 2016-12-22 | A method of solid State Welding is carried out using contact resistance |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611199016.5A CN106735805B (en) | 2016-12-22 | 2016-12-22 | A method of solid State Welding is carried out using contact resistance |
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| CN106735805A CN106735805A (en) | 2017-05-31 |
| CN106735805B true CN106735805B (en) | 2019-04-02 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112872574B (en) * | 2021-01-08 | 2022-04-29 | 固达电线电缆(集团)有限公司 | Copper component welding method and device |
| CN113547193B (en) * | 2021-08-06 | 2023-04-11 | 贵州电网有限责任公司 | Solid-state welding method and device for weather-resistant steel section |
| CN114101938B (en) * | 2021-12-06 | 2024-05-14 | 贵州大学 | Preheating method and laser welding method for bolt and fixing piece |
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| CN102107320A (en) * | 2010-12-30 | 2011-06-29 | 首钢总公司 | Pulsed switch-on preheating flash butt welding process for steel rims of heavy trucks |
| CN103252567A (en) * | 2013-04-23 | 2013-08-21 | 宁夏东方钽业股份有限公司 | Method for welding large-size tantalum strips |
| CN105458623A (en) * | 2015-12-04 | 2016-04-06 | 顾伟 | Welding production technology for R4-level anchor chain |
| CN106112241A (en) * | 2016-06-24 | 2016-11-16 | 江苏省沙钢钢铁研究院有限公司 | A kind of flash welding method of high corrosion-proof and high-strength reinforcing bar |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100966811B1 (en) * | 2003-06-20 | 2010-06-29 | 주식회사 포스코 | Flash butt welding method of titanium added low carbonic steel |
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2016
- 2016-12-22 CN CN201611199016.5A patent/CN106735805B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102107320A (en) * | 2010-12-30 | 2011-06-29 | 首钢总公司 | Pulsed switch-on preheating flash butt welding process for steel rims of heavy trucks |
| CN103252567A (en) * | 2013-04-23 | 2013-08-21 | 宁夏东方钽业股份有限公司 | Method for welding large-size tantalum strips |
| CN105458623A (en) * | 2015-12-04 | 2016-04-06 | 顾伟 | Welding production technology for R4-level anchor chain |
| CN106112241A (en) * | 2016-06-24 | 2016-11-16 | 江苏省沙钢钢铁研究院有限公司 | A kind of flash welding method of high corrosion-proof and high-strength reinforcing bar |
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Effective date of registration: 20230113 Address after: Kaifa Avenue, Guiyang Economic and Technological Development Zone, Guizhou Province Patentee after: Guiyang Daewoo Aviation Materials Engineering Co.,Ltd. Address before: Science and Technology Office, North Campus of Guizhou University, Guiyang City, Guizhou Province, 550025 Patentee before: Guizhou University |