CN201769005U - Stirrer used for friction stir welding of aluminum alloy - Google Patents
Stirrer used for friction stir welding of aluminum alloy Download PDFInfo
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- CN201769005U CN201769005U CN2010202525213U CN201020252521U CN201769005U CN 201769005 U CN201769005 U CN 201769005U CN 2010202525213 U CN2010202525213 U CN 2010202525213U CN 201020252521 U CN201020252521 U CN 201020252521U CN 201769005 U CN201769005 U CN 201769005U
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- aluminum alloy
- friction stir
- stir welding
- shaft shoulder
- stirring
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Abstract
The utility model discloses a tool used for friction stir welding, in particular relates to a stirrer suitable for being used for friction stir welding of aluminum alloy with the thickness of 25 millimeters or more. The stirrer used for friction stir welding of aluminum alloy comprises a clamping part, a shaft shoulder and a stirring needle, wherein the inward inclining angle Alpha of a shaft shoulder end surface formed at the connection part between the shaft shoulder and the stirring needle is equal to 10 to 20 degrees, and the stirring needle is tapered and provided with tapered threads on the surface. The stirrer used for friction stir welding of aluminum alloy has the following benefits: 1. aluminum alloy with the thickness of 25 millimeters or more can be welded, and no air pore is caused in weld joint structures; 2. the welding deformation is small, and the weld joints have attractive appearance; 3. the operating environment is friendly; 4. the connector is impact-resistant and fatigue-resistant; and 5. the welding residual stress is low.
Description
Technical field
The utility model relates to a kind of agitating friction welding and uses utensil, relates in particular to a kind of 25mm of being suitable for and above Aluminum Alloy Friction Stir Welding stirring-head.
Background technology
The agitating friction welding is to be invented in 1991 by Britain's institute of welding (TWI), and it is a kind of solid phase interconnection technique of green, compares with traditional melting welding, it is little to have welding deformation, pollution-free, and weld seam the common defectives of melting welding such as crackle, undercut can not occur, is particularly suitable for the welding of aluminium alloy.Since the success of the superiority of this technology, friction stir welding be applied to industries such as space flight, aviation, boats and ships.Though the agitating friction solder technology has obtained the development of leap, generally be no more than 25mm by the thickness of weldering product; Can weld the above aluminium alloy of 25mm though adopt metal argon arc welding to meet (MIG), pore can occur in the seam organization, weld seam also is difficult to the examination criteria that reaches relevant; In addition, the hot input quantity of metal argon arc welding is big, the difficult control of welding deformation.Therefore, surpassing 25mm aluminium alloy employing friction stir welding for thickness is a kind of preferable welding manner.And in agitating friction welding, the design of stirring-head is very crucial, its size and shape determined heating, plasticity to flow and plastifying material by the pattern of upset, also determined the intensity of size, speed of welding and the instrument of weld seam simultaneously; The stirring-head material has determined the intensity and the welding temperature of frictional heat rate, mixing needle, welding temperature then final decision which kind of material can carry out the agitating friction welding.The type body of stirring-head material, the stirring-head shaft shoulder and mixing needle is 3 major decision sexual factors of stirring-head quality, is related to performance and the production cost and the efficient of jointing.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of 25mm of being suitable for above aluminium alloy welding at the deficiency of above-mentioned prior art existence, and pore-free, welding piece are out of shape little friction welding stirring-head in the seam organization.
The utility model is that the technical scheme that problem adopted of the above-mentioned proposition of solution is: a kind of Aluminum Alloy Friction Stir Welding stirring-head, comprise clamping part, the shaft shoulder and mixing needle, the shaft shoulder end face that the described shaft shoulder and mixing needle junction form slopes inwardly angle a=10 °～20 °, it is conical that mixing needle is, and the surface is provided with taper thread.
Press such scheme, described shaft shoulder point diameter is Φ 36mm～Φ 38mm, and the diameter of described mixing needle root is Φ 16mm～Φ 18mm,
Press such scheme, the semi-cone angle b=8 of described mixing needle °～10 °, taper thread is a right-handed thread, and the specification of taper thread is M16 * 2 or M18 * 2.
Press such scheme, the front end termination of described mixing needle is set to sphere.
Press such scheme, described Aluminum Alloy Friction Stir Welding is the H13 hot die steel with the stirring-head material.
Press such scheme, the described shaft shoulder is tapered.
Press such scheme, the edge rounding R of the described shaft shoulder is 0.5～1 millimeter.
Press such scheme, the described shaft shoulder and mixing needle root adopt round-corner transition.
Press such scheme, described mixing needle length dimension is 24.5 ± 0.1mm.
Press such scheme, described clamping part comprises department of assembly and disassembling part; The department of assembly is cylindrical at a side milling one platform; Disassembling part is the flat protruding round platforms of symmetrical two side millings.
The stirring-head material is selected H13 hot die steel (4Cr5MoSiV1).The H13 hot die steel has medium chrome content and forms the alloying element of carbide, as tungsten, molybdenum and vanadium, has good high temperature resistance softening performance.Because phosphorus content is lower and total alloy content is also lower, usually under HRC40～HRC55 work hardness, has good toughness, vanadium can improve corrosion resistance at high temperature, element silicon can improve at the antioxygenic property of high temperature below 800 ℃, hardness can reach HRC48～51 after this material quenched, so be suitable as very much the material of stirring-head.The stirring-head fixed part comprises build-up member and dismounting parts.Build-up member is designed to mill a platform on stirring-head left side cylindrical; The dismounting parts are the protruding round platform on build-up member right side, and two side millings of round platform symmetry are flat, so that the Assembly And Disassembly of stirring-head.Shaft shoulder edge rounding helps to suppress the dark excessively plain arch of face of weld; The plastic metal that the interior profile of the shaft shoulder tilts to be convenient to around the envelope weld seam is assembled to the weld seam center.Mixing needle root and shaft shoulder transition are R3, can avoid the stress of mixing needle root to concentrate and fracture; The mixing needle thread surface promotes plastic property of weld bead metal flowing on thickness direction when helping the mixing needle rotation, thereby forms good weld seam; The length of mixing needle is generally than the short 0.5 ± 0.1mm of thickness of slab.
The beneficial effects of the utility model are: 1, can weld 25mm and above aluminium alloy plate, and pore-free in the seam organization.2, welding deformation is little, and appearance of weld is attractive in appearance.3, operating environment close friend.4, shock-resistant, the endurance of joint.5, welding residual stress is low.
Description of drawings
Fig. 1 the utility model Aluminum Alloy Friction Stir Welding front view of stirring-head structure;
Fig. 2 the utility model Aluminum Alloy Friction Stir Welding left view of stirring-head structure;
Fig. 3 the utility model Aluminum Alloy Friction Stir Welding structure chart at mixing needle position in the stirring-head structure;
Fig. 4 adopts the weld seam macroscopic view metallograph of specification 1 Aluminum Alloy Friction Stir Welding with the stirring-head welding;
Fig. 5 adopts the metallograph of specification 1 Aluminum Alloy Friction Stir Welding with the hot machine zone of influence in the weld seam of stirring-head welding;
Fig. 6 adopts the weld seam macroscopic view metallograph of specification 2 Aluminum Alloy Friction Stir Weldings with the stirring-head welding;
Fig. 7 adopts the metallograph of specification 2 Aluminum Alloy Friction Stir Weldings with the hot machine zone of influence in the weld seam of stirring-head welding;
The test plate (panel) thickness that Fig. 8 adopts metal argon arc welding to connect is the weld seam macro morphology figure of 25mm.
The specific embodiment
Further specify embodiment of the present utility model below in conjunction with accompanying drawing.
Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7, the Aluminum Alloy Friction Stir Welding stirring-head is made by the H13 hot-work die steel material, includes department of assembly 1 and disassembling part 2, the shaft shoulder 3 and mixing needle 4.Build-up member 1 is cylindrical at a side milling one platform; Dismounting parts 2 are the flat protruding round platforms of symmetrical two side millings.It is conical that mixing needle is, and the surface is provided with taper thread, and taper thread is a right-handed thread, and the front end termination of described mixing needle is set to sphere.The shaft shoulder is tapered, and the shaft shoulder and mixing needle root adopt round-corner transition.
Select for use the thick 5A06-H112 aluminium alloy of 25mm as by the weldering test plate (panel), select for use the Aluminum Alloy Friction Stir Welding of two kinds of specifications test plate (panel) to be carried out friction stir welding with stirring-head.Specification 1 Aluminum Alloy Friction Stir Welding is Φ 36mm with the shaft shoulder 3 diameters of stirring-head, the shaft shoulder 3 edge rounding R0.5, the shaft shoulder 3 slopes inwardly a=15 ° with the shaft shoulder 3 interior profiles that mixing needle 4 junctions form, mixing needle 4 root diameter (RD)s are Φ 16mm, semi-cone angle b=8 °, M16 * 2 right-handed threads are carved with on mixing needle 4 surfaces, and mixing needle 4 length dimensions are 24.4mm; Specification 2 Aluminum Alloy Friction Stir Weldings are Φ 38mm with the shaft shoulder 3 diameters of stirring-head, the shaft shoulder 3 edge rounding R are 1mm, the profile inclination is a=18 ° in the shaft shoulder 3, mixing needle 4 root diameter (RD)s are Φ 18mm, semi-cone angle b=10 °, M18 * 2 right-handed threads are carved with on mixing needle 4 surfaces, and mixing needle 4 length dimensions are 24.6mm.
(1) adopt the result of the test of specification 1 Aluminum Alloy Friction Stir Welding with the stirring-head welding:
Earlier be fixed on specification 1 Aluminum Alloy Friction Stir Welding on the main shaft of agitating friction soldering equipment with stirring-head, and band is tight, main shaft with the agitating friction soldering equipment tilts 2.5 ° to welding direction then, and selecting rotary speed for use is 280rpm, and speed of welding is that the welding parameter of 60mm/min is welded.Weld seam detects through X ray, does not find excessive defect, satisfies melting welding QJ2698-95I level weld seam standard.The tensile strength of weld seam is 355MPa, yield strength is 180MPa, percentage elongation is 17%, stipulate with aluminium alloy thick plate standard (GJB2662-96) the rustproof aluminum alloy 5A06-H112 supply of material according to Aero-Space, its hot strength 〉=305MPa, tensile strength 〉=147MPa, percentage elongation 〉=11, by above-mentioned testing result analysis as can be known, the mechanical performance in friction stir welding slit intensity for mother metal is higher.Weld seam detects discovery through metallographic: weldering nuclear crystal grain is tiny, and crystal grain is elongated the transition region (the hot machine zone of influence) of weldering nuclear and mother metal, but the relative mother metal of crystal grain is tiny.
(2) adopt the result of the test of specification 2 Aluminum Alloy Friction Stir Weldings with the stirring-head welding:
Earlier be fixed on specification 2 Aluminum Alloy Friction Stir Weldings on the main shaft of agitating friction soldering equipment with stirring-head, and band is tight, main shaft with the agitating friction soldering equipment tilts 2.5 ° to welding direction then, and selecting rotary speed for use is 280rpm, and speed of welding is that the welding parameter of 60mm/min is welded.Weld seam detects through X ray, does not find excessive defect, satisfies melting welding QJ2698-95I level weld seam standard.The tensile strength of weld seam is 360MPa, and yield strength is 185MPa, and percentage elongation is 19%.Weld seam detects discovery through metallographic: weldering nuclear crystal grain is tiny, and crystal grain is elongated the transition region (the hot machine zone of influence) of weldering nuclear and mother metal, but the relative mother metal of crystal grain is tiny.
By comparison diagram 4, Fig. 5, Fig. 6, Fig. 7 and Fig. 8, find out that significantly Aluminum Alloy Friction Stir Welding is better than the test specimen that metal argon arc welding connects with the test specimen that stirring-head welds out, pore-free in the seam organization.
Claims (10)
1. Aluminum Alloy Friction Stir Welding stirring-head, comprise clamping part, the shaft shoulder and mixing needle, it is characterized in that: the shaft shoulder end face that the described shaft shoulder and mixing needle junction form slopes inwardly angle a=10 °～20 °, and it is conical that mixing needle is, and the surface is provided with taper thread.
2. Aluminum Alloy Friction Stir Welding stirring-head according to claim 1 is characterized in that: described shaft shoulder point diameter is Φ 36mm～Φ 38mm, and the diameter of described mixing needle root is Φ 16mm～Φ 18mm,
3. Aluminum Alloy Friction Stir Welding stirring-head according to claim 1 and 2 is characterized in that: the semi-cone angle b=8 of described mixing needle °～10 °, taper thread is a right-handed thread, and the specification of taper thread is M16 * 2 or M18 * 2.
4. Aluminum Alloy Friction Stir Welding stirring-head according to claim 3 is characterized in that: the front end termination of described mixing needle is set to sphere.
5. Aluminum Alloy Friction Stir Welding stirring-head according to claim 4 is characterized in that: described Aluminum Alloy Friction Stir Welding is the H13 hot die steel with the stirring-head material.
6. Aluminum Alloy Friction Stir Welding stirring-head according to claim 1 and 2 is characterized in that: the described shaft shoulder is tapered.
7. Aluminum Alloy Friction Stir Welding stirring-head according to claim 6 is characterized in that: the edge rounding R of the described shaft shoulder is 0.5～1 millimeter.
8. Aluminum Alloy Friction Stir Welding stirring-head according to claim 7 is characterized in that: the described shaft shoulder and mixing needle root adopt round-corner transition.
9. Aluminum Alloy Friction Stir Welding stirring-head according to claim 8 is characterized in that: described mixing needle length dimension is 24.5 ± 0.1mm.
10. Aluminum Alloy Friction Stir Welding stirring-head according to claim 1 is characterized in that: described clamping part comprises department of assembly and disassembling part; The department of assembly is cylindrical at a side milling one platform; Disassembling part is the flat protruding round platforms of symmetrical two side millings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202525213U CN201769005U (en) | 2010-07-02 | 2010-07-02 | Stirrer used for friction stir welding of aluminum alloy |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202525213U CN201769005U (en) | 2010-07-02 | 2010-07-02 | Stirrer used for friction stir welding of aluminum alloy |
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| CN201769005U true CN201769005U (en) | 2011-03-23 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102642079A (en) * | 2012-05-02 | 2012-08-22 | 南京雷尔伟新技术有限公司 | Friction stir welding process for aluminum alloy side wall of rail transit vehicle |
| CN102848070A (en) * | 2011-10-28 | 2013-01-02 | 南通天华和睿科技创业有限公司 | Stirring pin |
| CN103978303A (en) * | 2014-05-12 | 2014-08-13 | 东莞市闻誉实业有限公司 | LED (Light-Emitting Diode) radiating fin splicing method and equipment |
| CN105290607A (en) * | 2015-12-02 | 2016-02-03 | 北京航天新风机械设备有限责任公司 | Stirring head for FSSW of aluminum alloy lapping structure |
| CN114309915A (en) * | 2021-12-31 | 2022-04-12 | 湖北三江航天红阳机电有限公司 | Stirring friction welding method for aluminum alloy cylindrical cabin body with notch and annular rib |
-
2010
- 2010-07-02 CN CN2010202525213U patent/CN201769005U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102848070A (en) * | 2011-10-28 | 2013-01-02 | 南通天华和睿科技创业有限公司 | Stirring pin |
| CN102642079A (en) * | 2012-05-02 | 2012-08-22 | 南京雷尔伟新技术有限公司 | Friction stir welding process for aluminum alloy side wall of rail transit vehicle |
| CN103978303A (en) * | 2014-05-12 | 2014-08-13 | 东莞市闻誉实业有限公司 | LED (Light-Emitting Diode) radiating fin splicing method and equipment |
| CN105290607A (en) * | 2015-12-02 | 2016-02-03 | 北京航天新风机械设备有限责任公司 | Stirring head for FSSW of aluminum alloy lapping structure |
| CN105290607B (en) * | 2015-12-02 | 2017-12-19 | 北京航天新风机械设备有限责任公司 | A kind of stirring-head of aluminum alloy lapped structure friction stir spot welding |
| CN114309915A (en) * | 2021-12-31 | 2022-04-12 | 湖北三江航天红阳机电有限公司 | Stirring friction welding method for aluminum alloy cylindrical cabin body with notch and annular rib |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110323 Termination date: 20130702 |