CN100506458C - Method for agitating, friction and welding cooling friction head and heat-connecting material - Google Patents
Method for agitating, friction and welding cooling friction head and heat-connecting material Download PDFInfo
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- CN100506458C CN100506458C CNB2007101306739A CN200710130673A CN100506458C CN 100506458 C CN100506458 C CN 100506458C CN B2007101306739 A CNB2007101306739 A CN B2007101306739A CN 200710130673 A CN200710130673 A CN 200710130673A CN 100506458 C CN100506458 C CN 100506458C
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Abstract
The invention is concerned with the mixing friction weld method for cooling friction head and heat joint material, which solves the problem that the hard steels can not weld by the mixing friction weld of the steel friction head, it is: uses the out heating source to heat the connecting material during the welding process in order to reach the plasticity temperature, assorts the friction weld head that cools by the cooling endless set to mix friction weld, creates plasticity area at the connecting material, which is solidification to the connecting weld line. The invention is fit for weld steel channel and container by the steel or copper alloy friction head mixing friction weld.
Description
Technical field:
A kind of friction head that cools off that the present invention proposes belongs to metal friction welding technology field with the friction stir welding method that adds the thermally coupled material, specially refers to cooling friction head and the friction stir welding method that adds the thermally coupled steel.
Background technology:
20th century, the friction welding (FW) method of attachment that the metal mother metal rotates just appearred in the fifties China, nineteen ninety-five Britain's institute of welding (TW1) has obtained the patent right (ZL95192193.2) of " friction rabbling welding " in China, this patent is no longer rotated the notion that produces frictional heat with traditional metal material, propose the hard metal material of another material and done friction head, enter connected material under this friction head rotational motion state, consequent frictional heat makes the connection material reach thermoplasticity temperature and thermoplasticity state, thereafter, this thermoplasticity metallic region is solidified and is formed and is welded to connect.
At present, though this friction stir is welded in aluminium and has obtained good effect with the aspect that is connected of aluminium alloy, but the friction stir welding to harder steel has just been met some difficulties, mainly be to select that more the friction head material of " firmly " is so uneasy than being connected metal, also have, thereby produce the plastic region high velocity of rotation and consume more energy on first watch that also needs to rub for connected steel will reach higher thermoplasticity temperature.
These are one of subject matter of running into of the friction stir welding of steel.
Summary of the invention:
For the above-mentioned technical problem that the friction stir welding that overcomes key in the background technology exists, propose a kind of novel friction head structure and improve the friction welding method that stirs, so that friction stir welding that can effective, high-quality realization steel.
Technical scheme of the present invention is as follows:
1. the friction head of a friction stir welding, this friction head 1 mainly contains the transmission rotation that is connected with power source and the joint portion of pressure, friction head main body 1-1, stir column cap 1-2 and spiral convex 1-3, it is characterized in that: in friction head 1, cooling-cycle device is set, this cooling-cycle device comprises: friction head main body 1-1 front end is equipped with and stirs column cap 1-2, stir the central blind hole that column cap 1-2 inside are provided with through its bottom, sealing ring 1-4 in the friction head main body 1-1 and up and down configuration go up sealing flange 1-5 and lower seal flange 1-6, and the locking nut 1-7 that compresses described sealing flange 1-5 of going up and lower seal flange 1-6, at above-mentioned locking nut 1-7, last sealing flange 1-5, the cooling medium delivery lines 4 that the centre of lower seal flange 1-6 and sealing ring 1-4 is provided with cooling medium ingress pipe 3 and disposes in cooling medium ingress pipe 3 peripheries, realize cool cycles by this cooling medium ingress pipe 3 and cooling medium delivery line 4 and the central blind hole that stirs column cap 1-2, stir the fully cooling and keep enough mechanicals behavior under high temperature of column cap 1-2 and spiral convex 1-3 so that make to friction head.
2. according to the friction stir welding method of the friction head 1 of above-mentioned friction stir welding, this method comprises that two connected materials 2 are fixing and asks its center pressurization, the friction head 1 of high speed rotating enters connected material 2 along the groove 2 one 1 of connected material 2, make it reach the thermoplasticity temperature and produce plastic region, and the plastic region of friction head 1 back solidifies and forms attachment weld.
It is characterized in that:
1) before the weldering, first external heat source 3-1 and second external heat source 3-2 heat connected material 2 from connected material 2 tow sides, make it reach the thermoplasticity temperature that is connected material, the heating of this first and second external heat sources all should keep in the whole process of welding;
2) cooling-cycle device of starting friction 1 makes circulating cooling medium can cool off the friction column cap 1-2 and the spiral convex 1-3 of friction head 1 continuously.
3. according to the cooling-cycle device in the above-mentioned friction head 1, the cooling medium in this device is selected water, compressed air or conduction oil for use.
4. according to above-mentioned friction stir welding method, first external heat source 3-1 and second external heat source 3-2 are any in flame, electric arc, high frequency, intermediate frequency, electromagnetic wave, microwave, laser, the electron beam in the method.
5. according to above-mentioned friction stir welding method, according to the material of connected material 2 and the intensity of requirement, be connected material 2 and be heated to its thermoplasticity or superplasticity temperature in the method by first external heat source 3-1 and second external heat source 3-2.
6. according to above-mentioned friction stir welding method, this method is applicable to the situation of steel or copper alloy system friction head welding steel.
The friction head that the present invention proposes and be connected friction stir welding method that material applies external heat source and can realize by steel or copper alloy system friction head to steel plate, steel container, steel pipe enforcement friction stir welding with cooling-cycle device, this adopts expensive special friction head material when just having been avoided agitating friction to weld harder metallic steel, the rotational energy of the weldering of also reducing friction simultaneously, and the high-quality of the efficient and welding of energy ensuring method.
Description of drawings:
Fig. 1 cools off the schematic diagram of friction head and the heated friction stir welding of connected material;
Fig. 2 cools off the schematic diagram of friction head structure;
Sun 3 utilizes the friction stir welding of the present patent application to connect the schematic diagram of steel container;
Fig. 4 utilizes friction stir welding of the present invention to connect the schematic diagram of steel pipe.
Fig. 1 is the schematic diagram of cooling friction head and the heated friction stir welding method of connected material, connected board-like material 2 tow sides are established among the figure heating source 3-1 and 3-2 pairs of connected materials 2 heating of second external heat source outside first, when connected material 2 is heated to its plasticity temperature, front end with friction head 1 of cooling-cycle device is being fixed stirring column cap 1-2 and spiral convex 1-3, under the effect under rotary power and the downward pressure F, this stirring column cap 1-2 and spiral convex 1-3 enter the groove 2-1 of the material 2 that is connected, the rotation of this whole friction head 1 makes groove 2-1 reach the thermoplasticity temperature, and produces the thermoplasticity state.Stir column cap 1-2 with and on spiral convex 1-3 metal of groove 2-1 vertically and is laterally stirred, its after coagulation forms attachment weld.
In order to guarantee that friction head 1, particularly wherein stirring column cap 1-2 and spiral convex 1-3 suitably reduce temperature, thereby guarantee the intensity of friction head, cooling medium imports friction head 1 by cooling medium introducing port 3, and by cooling medium export mouth 4 derivation cooling mediums, cooling medium carries out continuous cool cycles in friction head 1.
Select the kind of cooling medium, the flow velocity of control cooling medium that the temperature of friction column cap 1-2 and spiral convex 1-3 is reduced in various degree.
Fig. 2 is the schematic diagram of cooling friction head structure.The front end that column cap 1-2 is fixed on friction head main body 1-1 stirs in the transmission rotation that is connected with power source and the knot of pressure and portion's (Fig. 2 is not shown), stir the central blind hole that column cap 1-2 inside are provided with through its bottom, stir on the column cap 1-2 spiral convex 1-3 also is being set, spiral convex 1-3 is made of spiral convex up and down, they are the left and right screw threads of low-angle, determine the direction of rotation of convex up and down according to the direction of rotation of friction head 1.
In friction head 1 inside one cooling-cycle device is set, it is included in the sealing ring 1-4 in the friction head main body 1-1, and the last sealing flange 1-5 of the configuration thereon and lower seal flange 1-6, and the locking nut 1-7 that compresses them, at above-mentioned locking nut 1-7, lower seal flange 1-5, the centre of sealing ring 1-4 He Xiami village flanges 1-6 is provided with the cooling medium conduit 4 of cooling medium ingress pipe 3 and its peripheral configuration, by these two pipes, and the central blind hole that is arranged on stirring column cap 1-2 inside, cooling medium can carry out cool cycles, friction head 1, fully cooling and keep enough mechanicals behavior under high temperature of column cap 1-2 and spiral convex 1-3 particularly rubs.
Fig. 3 utilizes friction stir welding method of the present invention to connect the schematic diagram of steel container.Steel container 2 is set at its inside and outside heater 3-1 and 3-2 to steel container 2 heating and is heated to the thermoplasticity temperature, realizes friction stir welding at connection groove 2-1 place of steel container 2 by the friction head 1 with cooling device.
Fig. 4 is the steel pipe schematic diagram that utilizes friction stir welding method of the present invention to connect.Jig 5 connects steel pipe 2 when clamping, and after this steel pipe 2 makes its groove 2-1 be heated to the plasticity temperature by intermediate frequency heater (not marking among the figure), carries out friction stir welding by the friction head 1 with cooling-cycle device facing to groove 2-1.
Claims (6)
1. the friction head of a friction stir welding, this friction head (1) mainly contains the transmission rotation that is connected with power source and the joint portion of pressure, friction head main body (1-1), stir the spiral convex (1-3) of column cap (1-2), it is characterized in that, in this friction head (1), cooling-cycle device is set, this cooling-cycle device comprises: stir the central blind hole that column cap (1-2) inside is provided with through its bottom, last sealing flange (1-5) and lower seal flange (1-6) that sealing ring (1-4) in friction head main body (1-1) and described sealing ring (1-4) dispose up and down, and the locking nut (1-7) that compresses described upward sealing flange (1-5) and lower seal flange (1-6), at above-mentioned locking nut (1-7), last sealing flange (1-5), the cooling medium delivery line (4) that the centre of lower seal flange (1-6) and sealing ring (1-4) is provided with cooling medium ingress pipe (3) and disposes in cooling medium ingress pipe (3) periphery, by this cooling medium ingress pipe (3) and cooling medium delivery line (4) and stir the inner central blind hole cooling medium of column cap (1-2) and realize cool cycles, stir column cap (1-2) and spiral convex (1-3) and fully cool off and keep enough mechanicals behavior under high temperature so that make to friction head (1).
2. friction stir welding method that adopts the friction head (1) of the described a kind of friction stir welding of claim 1, this method comprises that two connected materials (2) are fixing and to its center pressurization, the friction head of high speed rotating (1) enters connected material (2) along the groove (2-1) of two connected materials (2), make it reach the thermoplasticity temperature and produce plastic region, and the plastic region of friction head (1) back solidifies and forms attachment weld; It is characterized in that this welding method mainly comprises:
1) before the weldering, first external heat source (3-1) and second external heat source (3-2) heat connected material (2) from connected material (2) tow sides respectively, make its thermoplasticity temperature that reaches connected material (2), the heating of this first and second external heat sources all should keep in the whole process of welding;
2) cooling-cycle device of starting friction head (1) makes the cooling medium of circulation can cool off the stirring column cap (1-2) and the spiral convex (1-3) of friction head (1) continuously.
3. friction head according to claim 1 (1) is characterized in that the cooling medium in the described cooling-cycle device is selected water, compressed air or conduction oil for use.
4. friction stir welding method according to claim 2 is characterized in that, described first external heat source (3-1) and second external heat source (3-2) are any in flame, electric arc, high frequency, intermediate frequency, electromagnetic wave, microwave, laser, the electron beam.
5. friction stir welding method according to claim 2, it is characterized in that, according to the material of connected material (2) and the bonding strength of requirement, connected material (2) is heated to its thermoplasticity temperature by first external heat source (3-1) and second external heat source (3-2).
6. friction stir welding method according to claim 2 is characterized in that, this method is applicable to the situation of steel or copper alloy system friction head welding steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101306739A CN100506458C (en) | 2007-07-16 | 2007-07-16 | Method for agitating, friction and welding cooling friction head and heat-connecting material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101306739A CN100506458C (en) | 2007-07-16 | 2007-07-16 | Method for agitating, friction and welding cooling friction head and heat-connecting material |
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| Publication Number | Publication Date |
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| CN101073853A CN101073853A (en) | 2007-11-21 |
| CN100506458C true CN100506458C (en) | 2009-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2007101306739A Expired - Fee Related CN100506458C (en) | 2007-07-16 | 2007-07-16 | Method for agitating, friction and welding cooling friction head and heat-connecting material |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7896216B2 (en) * | 2007-03-30 | 2011-03-01 | Kawasaki Jukogyo Kabushiki Kaisha | Sticking pad, friction stir welding machine and friction stir welding system |
| JP5690331B2 (en) * | 2010-04-02 | 2015-03-25 | 本田技研工業株式会社 | Dissimilar material joined body and joining method thereof |
| CN101829845A (en) * | 2010-06-01 | 2010-09-15 | 重庆大学 | Heating friction stir welding method |
| CN102248273B (en) * | 2011-06-14 | 2014-11-05 | 西安交通大学 | Electromagnetic pulse force and mechanical force composite cold pressure welding device |
| CN103846563B (en) * | 2012-11-29 | 2017-12-19 | 上海航天设备制造总厂 | A kind of laser friction stir welding method and its device |
| CN103008896B (en) * | 2012-12-31 | 2015-04-15 | 中国科学院半导体研究所 | Composite welding method combining laser with friction stir welding |
| CN108907448B (en) * | 2018-07-11 | 2021-05-04 | 中南大学 | Friction stir welding process method for movably heating back of thick plate copper-aluminum dissimilar metal |
| CN111805106A (en) * | 2020-08-07 | 2020-10-23 | 张洪涛 | Stirring induction welding method and stirring head |
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