CN103978304A - Thick plate stirring friction welding technology - Google Patents
Thick plate stirring friction welding technology Download PDFInfo
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- CN103978304A CN103978304A CN201410238732.4A CN201410238732A CN103978304A CN 103978304 A CN103978304 A CN 103978304A CN 201410238732 A CN201410238732 A CN 201410238732A CN 103978304 A CN103978304 A CN 103978304A
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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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
-
- 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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/24—Preliminary treatment
-
- 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
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
- B23K33/004—Filling of continuous seams
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/18—Sheet panels
- B23K2101/185—Tailored blanks
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/10—Aluminium or alloys thereof
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The invention relates to a thick plate stirring friction welding technology used for butt welding of large-thickness plates. The thick plate stirring friction welding technology comprises the following steps that (1) symmetric stepped grooves are formed in the edges to be welded of two large-thickness plates to be welded, wherein the width of each step is larger than the radius of a stirring head, the height of each step is smaller than the limit depth of single-face welding, and the thickness of the portion, at the bottom of each groove, of the corresponding plate is smaller than the limit depth of single-face welding; (2) the bottom of each groove is welded through stirring friction single-face welding and a plurality of concave pits enlarged gradually from bottom to top are formed in the opposite grooves of the two plates; (3) embedded strips made of materials identical to that of the plates are embedded in the lowest concave pits, wherein the width of each embedded strip is equal to that of the corresponding concave pit, and the thickness of each embedded strip is equal to the heights of the steps on the two sides of the corresponding concave pit; (4) the embedded strips and the plates are welded into a whole through stirring friction single-face welding and welding is conducted along a plurality of parallel welding seams in the process of welding, wherein the first welding seam and the last welding seam are welding seams between the embedded strips and the plates; (5) the step (3) and the step (4) are repeated until all the concave pits are leveled up. The thick plate stirring friction welding technology can be widely applied to stirring friction welding of butt joints of the large-thickness plates.
Description
Technical field
The present invention relates to a kind of welding procedure, particularly about a kind of for the butt-welded slab stirring friction-welding technique of large thickness sheet material.
Background technology
Compare with traditional gas shielded arc welding, use the resulting weld seam of friction stir welding processing aluminium alloy structure to have advantages of that zero defect, intensity are high outstanding, so agitating friction is welded in industrial circle and is just obtaining applying more and more widely.Particularly in the process of the large aluminum alloy housing of the industries such as Aero-Space, bullet train, high-speed ship; friction stir welding can processing gas protection weld the high strength weld seam that bad processing maybe can not be processed, thereby in these industries, has obtained irreplaceable status.
Although possess outstanding advantage, also there is not enough this obvious short slab of flexibility in agitating friction welding technology.Traditional melting welding can be processed by bead-welding technology the weld seam of any thickness, and the principle of friction stir welding has determined that its depth of weld is subject to the restriction of mixing needle length, during single-sided welding, can be slightly larger than mixing needle length by welded structure thickness, and the max architecture thickness that can process during welding by both sides is slightly larger than the twice of mixing needle length.As long as increase without limitation in theory, mixing needle just can weld the joint of infinite thickness, yet the increase along with mixing needle length, the amount of metal that in welding process, mixing needle stirs is more, the moment of torsion that mixing needle bears and moment of flexure also increase thereupon, until current material and processing technology cannot be manufactured the stirring-head that possesses sufficient intensity.Secondly, the growth of mixing needle also causes the raising of plant capacity in welding process, and the finiteness of plant capacity has determined the finiteness of mixing needle length equally.Therefore current this working ability is not enough 100mm when single welding, and welding by both sides deficiency 200mm, for the structure that is greater than this size, cannot obtain the high strength weld seam of friction stir welding.In addition, within above-mentioned working ability restriction, along with the lifting of working ability, equipment cost can be bordering on the growth of exponential type, and therefore conventional agitating friction soldering equipment only possesses the working ability below certain thickness.For using the large thickness weld seam of welding for the enterprise of routine work, can buy special equipment, and general enterprises for One's name is legion, to the process requirements of large thickness weld seam, be only property once in a while, buy expensive equipment for this reason and lose more than gain.
Summary of the invention
For the problems referred to above, the object of this invention is to provide the conventional agitating friction soldering equipment of a kind of use and realize the butt-welded slab stirring friction-welding technique of large thickness sheet material.
For achieving the above object, the present invention is by the following technical solutions: a kind of slab stirring friction-welding technique, comprise the following steps: 1) on two large thickness sheet materials to be welded, along edge to be welded, offer symmetrical stepped groove, the width of every grade of ladder is greater than stirring-head radius, highly be less than single welding limit depth, groove bottom sheets thickness is less than single welding limit depth; 2) use friction stir welding single welding bevel for welding bottom, the groove that two sheet materials are relative forms and becomes in turn from down to up large a plurality of pits; 3) being arranged in the embedding bar of nethermost pit embedding with sheet material homogeneity, embed the wide pit width that equals of bar, thickness equals the height of pit both sides step; 4) adopt friction stir welding single welding that embeddings bar and sheet material are welded as a whole, during welding, along the parallel weld seam of multiple tracks, weld, wherein first and last weld seam be together the weld seam between embedding bar and sheet material; 5) repeat implementation step 3), step 4), until all pits are filled and led up.
A kind of slab stirring friction-welding technique, comprise the following steps: 1) on two large thickness sheet materials to be welded, along edge to be welded, offer symmetrical stepped groove, the width of every grade of ladder is greater than stirring-head radius, highly be less than single welding limit depth, groove bottom sheets thickness is less than single welding limit depth; 2) use friction stir welding single welding bevel for welding bottom, the groove that two sheet materials are relative forms and becomes in turn from down to up large a plurality of pits; 3) embed the embedding bar with sheet material homogeneity being arranged in nethermost pit, embed that bar is wide equals to be positioned at nethermost pit width, thickness equals to be positioned at the height of nethermost pit both sides step; 4) adopt friction stir welding single welding that embeddings bar and sheet material are welded as a whole, during welding, adopt the parallel weld seam of multiple tracks to weld, wherein first and last weld seam be together the weld seam between embedding bar and sheet material; 5) repeat implementation step 3), step 4), until only a surplus uppermost pit exists; 6) embed a width and equal this pit width, thickness and be greater than this pit both sides shoulder height and top and to both sides, stretch out the T shape of winglet and embed bar being arranged in uppermost pit, wherein the width of winglet is greater than stirring-head radius; 7) adopt friction stir welding single welding that T shape embedding bar and sheet material are welded as a whole, during welding, along the parallel weld seam of multiple tracks, weld; 8) the part milling that T shape embedding bar is exceeded to sheet material is put down.
In described step 4) in, while adopting multiple-pass weld to weld, to guarantee: (n-1) g>f, in above formula, f is for embedding the width of bar, g be the nugget of per pass weld seam at the width at degree of depth c place, the quantity that n is weld seam, wherein, c is for embedding the thickness of bar.
The present invention is owing to taking above technical scheme, and it has the following advantages: 1, slab stirring friction-welding technique provided by the present invention, can break through the restriction of equipment and stirring-head, and realize the sheet material butt welding that thickness is surpassed to existing Friction stir welding ability.2, technique provided by the present invention, can realize the deep welding seam that uses small-sized agitating friction welding equipment welding originally to need special heavy agitating friction soldering equipment to weld, and can significantly reduce equipment cost, improves technological flexibility.3, the present invention adopts T shape to embed bar and the flat technique of milling, can solve easily the distinctive throat depth of friction stir welding lower than the problem of mother metal.The present invention can be widely used in the agitating friction welding of large thickness sheet material banjo fixing butt jointing.
Accompanying drawing explanation
Fig. 1 is that the present invention offers groove schematic diagram at sheet edge; Wherein, figure (a) is that sheet material is offered groove state before; Figure (b) is that sheet material is offered groove state afterwards;
Fig. 2 is embedding bar schematic diagram of the present invention;
Fig. 3 is that the present invention embeds bar and sheet material welding schematic diagram;
Fig. 4 is the weld seam schematic diagram that the present invention embeds bar;
Fig. 5 is that T shape of the present invention embeds bar schematic diagram; Wherein, figure (a) is welding state before; Figure (b) is the state after welding; Figure (c) is that after welding, T shape embeds bar top by the flat state of milling.
The specific embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
Embodiment mono-:
A kind of slab stirring friction-welding technique provided by the invention, it comprises the following steps:
1) as shown in Figure 1, on two large thickness sheet materials 1 to be welded, along edge to be welded, offer symmetrical stepped groove, the width of every grade of ladder is greater than stirring-head 2 radiuses, is highly less than single welding limit depth, and groove bottom sheets thickness is less than single welding limit depth.Single welding limit depth, institute's energy welded structure maximum ga(u)ge while referring to single-sided welding, it is slightly larger than mixing needle 3 length.
2) use friction stir welding single welding bevel for welding bottom, the groove that two sheet materials 1 are relative forms and becomes in turn from down to up large a plurality of pits 4.
3) as shown in Figure 2, embed the embedding bar 5 with sheet material 1 homogeneity being arranged in nethermost pit 4, embed that bar 5 is wide equals to be positioned at nethermost pit 4 width, thickness equals to be positioned at the height of nethermost pit 4 both sides steps.
4) as shown in Figure 3, adopt friction stir welding single welding that embedding bar 5 and sheet material 1 are welded as a whole, during welding, along the parallel weld seam 6 of multiple tracks, weld, wherein first and last weld seam together 6 for embedding the weld seam 6 (as shown in Figure 4) between bar and sheet material 1.
5) repeat implementation step 3), step 4), until all pits 4 are filled and led up.
Embodiment bis-:
The present invention also provides another embodiment, the step 1 of this embodiment) to step 4) identical with embodiment mono-, its step different from embodiment mono-is as follows:
5) repeat implementation step 3), step 4), until only a surplus uppermost pit 4 exists.
6) as shown in Figure 5, embed a width and equal pit width, thickness and be greater than pit both sides shoulder height and top and to both sides, stretch out the T shape of winglet and embed bar 8 in the pit of going up most, wherein the width of winglet is greater than stirring-head 1 radius.
7) adopt friction stir welding single welding that T shape is embedded to bar 8 and be welded as a whole with sheet material 1, during welding, along the parallel weld seam 6 of multiple tracks, weld.
8) the part milling that T shape embedding bar 8 is exceeded to sheet material 1 is put down.
With a specific embodiment, technique effect of the present invention is described below.As shown in Figure 1, the diameter of the stirring-head 2 of the agitating friction welder using in the present embodiment is a, mixing needle 3 length are b, suppose that length is that the thickness that the mixing needle 3 of b can a through welding is applicable throat thickness, and its value is e (this value is less than and welds limit depth).
1) on two sheet materials to be welded 1, along edge to be welded, offer symmetrical stepped groove, after bevel, the residual thickness of sheet material 1 is got e (be less than e also can).Every grade of shoulder height c of step-like groove is less than b, and width d is greater than a/2.
2) use friction stir welding single welding bevel for welding bottom, the groove that two sheet materials 1 are relative forms and becomes in turn from down to up large a plurality of pits 4.
3) as shown in Figure 2, according to the width between every layer of step, process embedding bar 5 a series of and sheet material 1 homogeneity, its quantity equates with the quantity of pit 4, embeds a width and equals the embedding bar 5 that these pit 4 width, thickness equal these pit 4 both sides shoulder heights being arranged in nethermost pit 4.
4) as shown in Figure 3, adopt friction stir welding single welding that embedding bar and sheet material 1 are welded as a whole, due in step 2) in to groove bottom, adopt friction stir welding can make pit 4 bottom surfaces of lowermost layer uneven, can there is a space 7 in the bottom surface and pit 4 bottom surfaces that embed bar 5, therefore, by the parallel friction stir welding of multiple tracks, embedding bar 5 and sheet material 1 are welded as a whole.In this process, the characteristic of friction stir welding can be ordered about mobile metal and be filled up the space 7 that embeds bar 5 and pit 4 bottom surfaces.As shown in Figure 4, suppose that the width of embedding bar 5 is f, the width of the nugget of per pass weld seam 6 at degree of depth c place is g, and the quantity of weld seam is n.In order to make to embed bar 5, became one with sheet material 1 thoroughly, avoid the not defect such as seam, hole, thereby need to guarantee to embed bar 5 all flows and mutually combines fully with the metal of sheet material 1 junction under the stirring action of mixing needle 3, therefore Xu Shi nugget district covers whole junction surface, is exactly in fact cross section and the edge that covers whole embedding bar 5.For achieving the above object, should guarantee (n-1) g>f.Putting before this, the movement locus of stirring-head can be one group of equidirectional parallel lines, can be also the serpentine of back and forth advancing.
5) repeat implementation step 3), step 4), until only a surplus uppermost pit 4 exists.
6) as shown in Figure 5, embed a width and equal this pit width, thickness and be greater than this pit both sides shoulder height and top and to both sides, stretch out the T shape of winglet 9 and embed bar 8 in uppermost pit 4, wherein the width of winglet 9 is greater than stirring-head 2 radiuses.
7) adopt friction stir welding single welding that T shape is embedded to bar 8 and be welded as a whole with sheet material 1, during welding, adopt the parallel weld seam of multiple tracks 6 to weld.
8) T shape being embedded to bar 8 puts down higher than the part milling of sheet material 1.
The present invention only describes with above-described embodiment; the structure of each parts, setting position and connection thereof all can change to some extent; on the basis of technical solution of the present invention; all improvement of indivedual parts being carried out according to the principle of the invention and equivalents, all should not get rid of outside protection scope of the present invention.
Claims (4)
1. a slab stirring friction-welding technique, comprises the following steps:
1) on two large thickness sheet materials to be welded, offer symmetrical stepped groove along edge to be welded, the width of every grade of ladder is greater than stirring-head radius, is highly less than single welding limit depth, and groove bottom sheets thickness is less than single welding limit depth;
2) use friction stir welding single welding bevel for welding bottom, the groove that two sheet materials are relative forms and becomes in turn from down to up large a plurality of pits;
3) being arranged in the embedding bar of nethermost pit embedding with sheet material homogeneity, embed the wide pit width that equals of bar, thickness equals the height of pit both sides step;
4) adopt friction stir welding single welding that embeddings bar and sheet material are welded as a whole, during welding, along the parallel weld seam of multiple tracks, weld, wherein first and last weld seam be together the weld seam between embedding bar and sheet material;
5) repeat implementation step 3), step 4), until all pits are filled and led up.
2. a kind of slab stirring friction-welding technique as claimed in claim 1, is characterized in that: in described step 4) in, while adopting multiple-pass weld to weld, to guarantee: (n-1) g>f,
In above formula, f is for embedding the width of bar, g be the nugget of per pass weld seam at the width at degree of depth c place, the quantity that n is weld seam, wherein, c is the thickness of embedding bar.
3. a slab stirring friction-welding technique, comprises the following steps:
1) on two large thickness sheet materials to be welded, offer symmetrical stepped groove along edge to be welded, the width of every grade of ladder is greater than stirring-head radius, is highly less than single welding limit depth, and groove bottom sheets thickness is less than single welding limit depth;
2) use friction stir welding single welding bevel for welding bottom, the groove that two sheet materials are relative forms and becomes in turn from down to up large a plurality of pits;
3) embed the embedding bar with sheet material homogeneity being arranged in nethermost pit, embed that bar is wide equals to be positioned at nethermost pit width, thickness equals to be positioned at the height of nethermost pit both sides step;
4) adopt friction stir welding single welding that embeddings bar and sheet material are welded as a whole, during welding, adopt the parallel weld seam of multiple tracks to weld, wherein first and last weld seam be together the weld seam between embedding bar and sheet material;
5) repeat implementation step 3), step 4), until only a surplus uppermost pit exists;
6) embed a width and equal this pit width, thickness and be greater than this pit both sides shoulder height and top and to both sides, stretch out the T shape of winglet and embed bar being arranged in uppermost pit, wherein the width of winglet is greater than stirring-head radius;
7) adopt friction stir welding single welding that T shape embedding bar and sheet material are welded as a whole, during welding, along the parallel weld seam of multiple tracks, weld;
8) the part milling that T shape embedding bar is exceeded to sheet material is put down.
4. a kind of slab stirring friction-welding technique as claimed in claim 3, is characterized in that: in described step 4) in, while adopting multiple-pass weld to weld, to guarantee: (n-1) g>f,
In above formula, f is for embedding the width of bar, g be the nugget of per pass weld seam at the width at degree of depth c place, the quantity that n is weld seam, wherein, c is the thickness of embedding bar.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410238732.4A CN103978304B (en) | 2014-05-30 | 2014-05-30 | A kind of slab stirring friction-welding technique |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410238732.4A CN103978304B (en) | 2014-05-30 | 2014-05-30 | A kind of slab stirring friction-welding technique |
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| CN103978304A true CN103978304A (en) | 2014-08-13 |
| CN103978304B CN103978304B (en) | 2016-09-21 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107335909A (en) * | 2017-08-17 | 2017-11-10 | 沈阳富创精密设备有限公司 | In a kind of semicon industry aluminium alloy, thick plates method |
| CN110052700A (en) * | 2019-04-24 | 2019-07-26 | 燕山大学 | The increasing material agitating friction Joining Technology of light-alloy thickness section connector |
| JP2019126825A (en) * | 2018-01-24 | 2019-08-01 | 日本製鉄株式会社 | Welding joint |
| CN115283815A (en) * | 2022-08-19 | 2022-11-04 | 燕山大学 | Welding method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11342481A (en) * | 1998-06-01 | 1999-12-14 | Nippon Light Metal Co Ltd | Friction agitating joining method for thick joining material, joined structure, and its crane boom |
| JP2000094159A (en) * | 1998-09-16 | 2000-04-04 | Nippon Light Metal Co Ltd | Joining method of aluminum or aluminum alloy plate |
| JP2009018348A (en) * | 2008-10-29 | 2009-01-29 | Nippon Light Metal Co Ltd | Method of joining thick material, and joined structure |
-
2014
- 2014-05-30 CN CN201410238732.4A patent/CN103978304B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11342481A (en) * | 1998-06-01 | 1999-12-14 | Nippon Light Metal Co Ltd | Friction agitating joining method for thick joining material, joined structure, and its crane boom |
| JP2000094159A (en) * | 1998-09-16 | 2000-04-04 | Nippon Light Metal Co Ltd | Joining method of aluminum or aluminum alloy plate |
| JP2009018348A (en) * | 2008-10-29 | 2009-01-29 | Nippon Light Metal Co Ltd | Method of joining thick material, and joined structure |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107335909A (en) * | 2017-08-17 | 2017-11-10 | 沈阳富创精密设备有限公司 | In a kind of semicon industry aluminium alloy, thick plates method |
| JP2019126825A (en) * | 2018-01-24 | 2019-08-01 | 日本製鉄株式会社 | Welding joint |
| JP7104368B2 (en) | 2018-01-24 | 2022-07-21 | 日本製鉄株式会社 | Welded joint |
| CN110052700A (en) * | 2019-04-24 | 2019-07-26 | 燕山大学 | The increasing material agitating friction Joining Technology of light-alloy thickness section connector |
| CN115283815A (en) * | 2022-08-19 | 2022-11-04 | 燕山大学 | Welding method |
| CN115283815B (en) * | 2022-08-19 | 2023-08-22 | 燕山大学 | Welding method |
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| CN103978304B (en) | 2016-09-21 |
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