CN211248763U - Shaft shoulder-free friction stir welding tool without flash and thinning - Google Patents
Shaft shoulder-free friction stir welding tool without flash and thinning Download PDFInfo
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- CN211248763U CN211248763U CN201921931810.3U CN201921931810U CN211248763U CN 211248763 U CN211248763 U CN 211248763U CN 201921931810 U CN201921931810 U CN 201921931810U CN 211248763 U CN211248763 U CN 211248763U
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Abstract
The utility model discloses a no shaft shoulder friction stir welding instrument of no overlap and attenuate, include: the welding fixture comprises a shaft shoulder-free stirring pin, a pressing plate, a welding block, a bearing, a welded part and a substrate, wherein the pressing plate is used for pressing the welded part on the substrate, a pressing plate matching body groove is formed in the pressing plate, a trapezoidal pressing plate matching body is arranged in the pressing plate matching groove, and the bearing is connected to the welding block. The utility model correspondingly designs the shaft shoulder-free stirring pin and the press plate matched with the shaft shoulder-free stirring pin according to the change of the thickness and the appearance of the welded piece, realizes the good matching of the shaft shoulder-free stirring pin matching body, the press plate matching body and the welding block matching body, and is easy to remove scraps; meanwhile, the friction stir welding without flash and thinning is realized, and the method has the advantages of simple design, convenience in installation and wide applicability.
Description
Technical Field
The utility model discloses a no shaft shoulder friction stir welding instrument of no overlap and attenuate relates to stirring tool technical field.
Background
Since the friction stir welding technology was put to practical use by the british welding institute in 1991, it has been widely used in the manufacturing fields of aviation, aerospace, high-speed ships, automobile industry, high-speed trains, etc. because of its many advantages such as low heat input, small welding deformation, good microstructure of weld joints and good mechanical properties.
In order to overcome the limitations of welding flash, thinning and the like of the traditional friction stir welding technology, the British welding research institute separates a shaft shoulder from a stirring pin on the basis of the traditional FSW and develops the static shaft shoulder friction stir welding technology. The existing novel friction stir welding tool (CN 201610524886.9) for welding the surface of a post-welding material without thinning provides a static shaft shoulder friction stir welding device for flat plate butt joint, solves the problem of thinning after friction stir welding, but has complex structure, strict assembly requirement, easy occlusion of a shaft shoulder-free stirring needle and a static shaft shoulder and difficult realization of engineering application; the existing foreign patents (US 7404510B2 and US 7416102B 1) relate to a shaft shoulder-free friction stir welding tool, which can not solve the problems of welding flash and thinning and easily generate welding defects although realizing welding of plates with different thicknesses; although the welding flash is reduced by improving the surface shape and the structure of the shaft shoulder-free stirring pin in the prior stirring head for the shaft shoulder-free stirring friction welding (CN 201310046262.7), the problem of welding flash of the stirring friction welding cannot be fundamentally solved, and the problem of welding thinning cannot be solved.
Therefore, in order to solve the technical problems of welding flash and thinning of friction stir welding in the prior art, a flash-free and thinning shaft-shoulder-free friction stir welding tool is provided.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the defect among the above-mentioned background art, provide a no shoulder friction stir welding instrument of no overlap and attenuate, improve the welding seam quality.
In order to achieve the above object, the utility model adopts the following technical scheme: a no shoulder friction stir welding instrument of no overlap and attenuate includes: the welding device comprises a shaft shoulder-free stirring pin, a pressing plate, a welding-following block, a bearing, a welded piece and a substrate, wherein the pressing plate is used for tightly pressing the welded piece on the substrate, a pressing plate matching body groove is formed in the pressing plate, a trapezoidal pressing plate matching body is arranged in the pressing plate matching groove, the bearing is connected to the welding-following block,
during welding, the central line of the groove of the pressing plate matching body is aligned to a welding line between welded pieces, the welding-block-following stirring pin is placed on the pressing plate matching body in a matching mode, the shaft-shoulder-free stirring pin penetrates through the welding-block-following stirring pin and the groove of the pressing plate matching body through the bearing to be aligned to the welding line, the welding-block-following stirring pin is driven to move along the pressing plate matching body, and welding is completed.
Furthermore, the shaft shoulder-free stirring pin comprises a clamping end, a stop table, a shaft shoulder-free stirring pin matching body and a pin head; the needle head is arranged at the front end of the stirring needle matching body, and the surface of the shaft shoulder-free stirring needle matching body is in a stepped shape and is used for matching with the pressing plate matching body.
Furthermore, the welding-following block comprises a welding-following block matching body, a bearing hole is formed in the welding-following block matching body, a first threaded hole is formed in the side face of the welding-following block matching body, and the bearing hole is used for mounting a bearing; the inner side of the welding-block following matching body is provided with a stepped limiting table which is used for matching the shaft-shoulder-free stirring pin matching body respectively; the outer side of the welding-block following matching body is provided with a stepped limiting table which is used for matching with the pressing plate matching body; and fixing the bearing with the welding block through the first threaded hole and the fastening screw.
Furthermore, the shaft-shoulder-free stirring needle matching body comprises a lower matching surface of the shaft-shoulder-free stirring needle matching body, a middle matching surface of the shaft-shoulder-free stirring needle matching body and an upper matching surface of the shaft-shoulder-free stirring needle matching body, the lower matching surface of the shaft-shoulder-free stirring needle matching body and the clamping end are on the same cylindrical surface, the middle matching surface of the shaft-shoulder-free stirring needle matching body is perpendicular to the lower matching surface of the shaft-shoulder-free stirring needle matching body, and the upper matching surface of the shaft-shoulder-free stirring needle matching body is a transition surface between the middle matching surface of the shaft-shoulder-free stirring needle matching body and the needle head.
Furthermore, the needle head is conical, and the length of the needle head is smaller than the thickness of the welded part by 0.2-0.5 mm.
Furthermore, the press plate matching body is in clearance fit with the lower matching surface of the shaft-shoulder-free stirring needle matching body, the middle matching surface of the shaft-shoulder-free stirring needle matching body and the upper matching surface of the shaft-shoulder-free stirring needle matching body, and the matching clearances are respectively 0.01 mm-0.06 mm, 0.10 mm-0.20 mm and 0.01 mm-0.06 mm;
the welding-block-following matching body is in clearance fit with the lower matching surface of the shaft-shoulder-free stirring needle matching body, the middle matching surface of the shaft-shoulder-free stirring needle matching body and the upper matching surface of the shaft-shoulder-free stirring needle matching body, and the matching clearances are respectively 0.01 mm-0.06 mm, 0.10 mm-0.20 mm and 0.01 mm-0.06 mm.
The conventional friction stir welding shaft shoulder rotates and has a certain pressing amount, and flash and thinning exist during friction stir welding; simultaneously, quiet shoulder friction stir welding is because the shoulder pushes down with the needle in the welding process together, and the welding process is difficult to avoid quiet shoulder to impress by the welding material and lead to welding back attenuate, and the utility model discloses a no shoulder stirring needle cooperation body and clamp plate cooperation body, along with the welding block cooperation body through the stairstepping appearance realization good cooperation, the clamp plate reaches along with the welding block all can not impress by the welding material, prevent by the weldment material crowded clamp plate, along with between welding block and the no shoulder stirring needle, extrude the clamp plate even, and then solve the problem of welding back overlap and attenuate fundamentally.
Furthermore, the shape of the stepped limiting table on the inner side of the welding-block following matching body is matched with the shape of the front end of the shaft-shoulder-free stirring pin matching body; the stepped shape of the shaft shoulder-free stirring pin matching body and the pressing plate matching body can be vertical linear shape, oblique line shape, fold line shape and curved shape, and only the shaft shoulder-free stirring pin matching body and the pressing plate matching body need to be well matched.
Furthermore, the pressing plate and the base plate are connected through bolts.
Furthermore, the shapes of the pressure plate and the base plate are matched with the shapes of the welded parts, such as a straight line shape, an oblique line shape and a curved line shape.
The utility model discloses specific operation process: butt-jointing the welded parts and placing the welded parts on a substrate;
placing a pressing plate on a welded piece, ensuring that the central line of a matching body of the pressing plate is aligned with a welding line, and fixing the pressing plate on a substrate by means of bolts;
mounting a bearing at the position of a stop table of a shaft shoulder-free stirring needle, then mounting a welding-following block on the bearing through a bearing hole to realize tight fit of the welding-following block and the bearing, and mounting the shaft shoulder-free stirring needle on a friction stir welding machine tool through a clamping end;
during welding, the center of the needle head of the shaft shoulder-free stirring needle is aligned to the center of a welding seam, the welding-block-following matching body is embedded into the groove of the pressing plate matching body, the shaft shoulder-free stirring needle is pricked into a welded piece until the needle heads completely enter, the shaft shoulder-free stirring needle matching body is well matched with the pressing plate matching body and the welding-block-following matching body through the step-shaped appearance, and welding is started.
Has the advantages that: the utility model correspondingly designs the shaft shoulder-free stirring pin and the press plate matched with the shaft shoulder-free stirring pin according to the change of the thickness and the appearance of the welded piece, realizes the good matching of the shaft shoulder-free stirring pin matching body, the press plate matching body and the welding block matching body, and is easy to remove scraps; meanwhile, the friction stir welding without flash and thinning is realized, and the method has the advantages of simple design, convenience in installation and wide applicability.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic sectional view of the structure of the present invention;
FIG. 3 is a schematic view of the structure of the stirring pin;
FIG. 4 is a schematic view of a welding-following block structure;
FIG. 5 is a view of another embodiment;
FIG. 6 is a view of a third embodiment;
1-shaft shoulder-free stirring pin, 11-clamping end, 12-stopping table, 13-shaft shoulder-free stirring pin matching body, 131-shaft shoulder-free stirring pin matching body lower matching surface, 132-shaft shoulder-free stirring pin matching body middle matching surface, 133-shaft shoulder-free stirring pin matching body upper matching surface, 14-needle head, 2-pressing plate, 21-pressing plate matching body, 22-pressing plate matching body groove, 23-bolt hole, 3-welding-following block, 31-bearing hole, 32-welding-following block matching body, 33-threaded hole I, 4-bearing, 5-welded piece, 6-substrate, 61-threaded hole II, 7-bolt and 8-fastening screw.
Detailed Description
The following describes the embodiments in further detail with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
In one embodiment of fig. 1-2, a shoulder-less friction stir welding tool without flash and thinning comprises: the welding device comprises a shaft shoulder-free stirring pin 1, a pressing plate 2, a welding-following block 3, a bearing 4, a welded part 5 and a substrate 6, wherein the pressing plate 2 is used for pressing the welded part 5 on the substrate 6, a pressing plate matching body groove 22 is formed in the pressing plate 2, a trapezoidal pressing plate matching body 21 is arranged in the pressing plate matching body groove 22, and the bearing 4 is connected to the welding-following block 3;
during welding, the central line of the pressing plate matching body groove 22 is aligned to a welding line between the welded pieces 5, the welding-block-free stirring pin 1 is placed on the pressing plate matching body 21 along with the matching of the welding block 3, penetrates through the welding-block-free stirring pin 1 and the pressing plate matching body groove 22 through the bearing 4 to be aligned to the welding line, and is driven to move along the pressing plate matching body 21 along with the welding block 3, so that welding is completed.
As shown in fig. 3, the shoulder-free pin 1 includes a holding end 11, a stop 12, a shoulder-free pin engaging body 13 and a pin head 14; the needle 14 is arranged at the front end of the mixing needle matching body 13, and the surface of the shaft shoulder-free mixing needle matching body 13 is stepped and is used for matching with the pressing plate matching body 21.
As shown in fig. 4, the solder block 3 includes a solder block mating body 32, a bearing hole 31 is provided in the solder block mating body 32, a first threaded hole 33 is provided on a side surface of the solder block mating body 32, and the bearing hole 31 is used for mounting the bearing 4; the inner side of the welding-block following matching body 32 is provided with a step-shaped limiting table which is used for matching with the shaft-shoulder-free stirring pin matching body 13 respectively; the outer side of the welding block following matching body 32 is provided with a step-shaped limiting table which is used for matching with the pressing plate matching body 21; the bearing 4 is fixed with the welding block 3 through the first threaded hole 33 and the fastening screw 8;
the shaft-shoulder-free stirring needle matching body 13 comprises a shaft-shoulder-free stirring needle matching body lower matching surface 131, a shaft-shoulder-free stirring needle matching body middle matching surface 132 and a shaft-shoulder-free stirring needle matching body upper matching surface 133, the shaft-shoulder-free stirring needle matching body lower matching surface 131 and the clamping end 11 are on the same cylindrical surface, the shaft-shoulder-free stirring needle matching body middle matching surface 132 is perpendicular to the shaft-shoulder-free stirring needle matching body lower matching surface 131, and the shaft-shoulder-free stirring needle matching body upper matching surface 133 is arranged between the shaft-shoulder-free stirring needle matching body middle matching surface 132 and the needle head conical surface.
The needle head 14 is conical, the length of the needle head 14 is smaller than the thickness of the welded part 5 by 0.2-0.5 mm, and the length of the needle head 14 can be flexibly adapted according to the thickness of the welded part.
The press plate matching body 21 is in clearance fit with the lower matching surface 131 of the shaft-shoulder-free stirring needle matching body, the middle matching surface 132 of the shaft-shoulder-free stirring needle matching body and the upper matching surface 133 of the shaft-shoulder-free stirring needle matching body, and the matching clearances are respectively 0.01 mm-0.06 mm, 0.10 mm-0.20 mm and 0.01 mm-0.06 mm;
the welding-block following matching body 32 is in clearance fit with the lower matching surface 131 of the shaft-shoulder-free stirring needle matching body, the middle matching surface 132 of the shaft-shoulder-free stirring needle matching body and the upper matching surface 133 of the shaft-shoulder-free stirring needle matching body, and the matching clearances are respectively 0.01 mm-0.06 mm, 0.10 mm-0.20 mm and 0.01 mm-0.06 mm.
The pressing plate 2 is connected with the base plate 6 through bolts, the base plate is provided with a second threaded hole 23, and the pressing plate is provided with a bolt hole 62.
As shown in fig. 5, the present invention provides another embodiment: the difference from the above embodiment is that: the front end of the trapezoidal limiting table in the welding block is an inclined plane, and the trapezoidal limiting table is used when the upper matching surface of the shaft shoulder-free stirring pin matching body is an inclined plane.
As shown in fig. 6, the present invention provides another embodiment: the difference from the above embodiment is that: the welded piece comprises a high plane, a low plane and a middle continuous transition curved surface, the base plate of the embodiment can be provided with a cushion table according to the appearance of the welded piece, and the pressing plate of the embodiment is also provided with the high plane, the low plane and the transition curved surface for being matched with the welded piece to finish friction welding.
The utility model discloses specific operation process includes: butt-jointing the welded parts and placing the welded parts on a substrate;
placing a pressing plate on a welded piece, ensuring that the central line of a matching body of the pressing plate is aligned with a welding line, and fixing the pressing plate on a substrate by means of bolts;
mounting a bearing at the position of a stop table of a shaft shoulder-free stirring needle, then mounting a welding-following block on the bearing through a bearing hole to realize tight fit of the welding-following block and the bearing, and mounting the shaft shoulder-free stirring needle on a friction stir welding machine tool through a clamping end;
during welding, the center of the needle head of the shaft shoulder-free stirring needle is aligned to the center of a welding seam, the welding-block-following matching body is embedded into the groove of the pressing plate matching body, the shaft shoulder-free stirring needle is pricked into a welded piece until the needle heads completely enter, the shaft shoulder-free stirring needle matching body is well matched with the pressing plate matching body and the welding-block-following matching body through the step-shaped appearance, and welding is started.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.
Claims (9)
1. The utility model provides a no shoulder friction stir welding instrument of no overlap and attenuate which characterized in that includes: the welding device comprises a shaft shoulder-free stirring pin (1), a pressing plate (2), a welding block (3), a bearing (4), a welded part (5) and a substrate (6), wherein the pressing plate (2) is used for pressing the welded part (5) onto the substrate (6), a pressing plate matching body groove (22) is formed in the pressing plate (2), a trapezoidal pressing plate matching body (21) is arranged in the pressing plate matching body groove (22), the bearing (4) is connected onto the welding block (3),
during welding, the central line of the pressing plate matching body groove (22) is aligned to a welding line between welded pieces (5), the welded pieces are placed on the pressing plate matching body (21) along with the matching of the welding blocks (3), the shaft-shoulder-free stirring pin (1) penetrates through the bearing (4) to be aligned to the welding line along with the welding blocks (3) and the pressing plate matching body groove (22), and the welding piece (3) is driven to move along with the pressing plate matching body (21) to complete welding.
2. The flash-free and thinned shoulder-free friction stir welding tool according to claim 1, wherein the shoulder-free stir pin (1) comprises a clamping end (11), a stop (12), a shoulder-free stir pin mating body (13), and a pin head (14); the needle head (14) is arranged at the front end of the stirring needle matching body (13), and the surface of the stirring needle matching body (13) without the shaft shoulder is in a step shape and is used for matching with the pressing plate matching body (21).
3. The flash-free and thinning shaft-shoulder-free friction stir welding tool according to claim 1, wherein the welding-following block (3) comprises a welding-following block matching body (32), a bearing hole (31) is formed in the welding-following block matching body (32), a first threaded hole (33) is formed in the side surface of the welding-following block matching body (32), and the bearing hole (31) is used for installing a bearing (4); the inner side of the welding block following matching body (32) is provided with a step-shaped limiting table which is used for matching the shaft shoulder-free stirring pin matching body (13) respectively; the outer side of the welding block following matching body (32) is provided with a step-shaped limiting table which is used for matching with the pressing plate matching body (21); and the bearing (4) is fixed by the welding-following block (3) through the first threaded hole (33) and the fastening screw (8).
4. The burr-free and thinned shoulder-free friction stir welding tool according to claim 2, wherein the shoulder-free stir needle fitting body (13) comprises a shoulder-free stir needle fitting body lower fitting surface (131), a shoulder-free stir needle fitting body middle fitting surface (132) and a shoulder-free stir needle fitting body upper fitting surface (133), the shoulder-free stir needle fitting body lower fitting surface (131) and the clamping end (11) are on the same cylindrical surface, the shoulder-free stir needle fitting body middle fitting surface (132) is perpendicular to the shoulder-free stir needle fitting body lower fitting surface (131), and the shoulder-free stir needle fitting body upper fitting surface (133) is a transition surface between the shoulder-free stir needle fitting body middle fitting surface (132) and the surface where the needle head (14) is located.
5. The burr-free and reduced-thickness shoulder-free friction stir welding tool according to claim 2, wherein the tip (14) is tapered, and the length of the tip (14) is 0.2-0.5 mm smaller than the thickness of the workpiece (5).
6. The burr-free and thinned shaft-shoulder-free friction stir welding tool according to claim 3, wherein the press plate fitting body (21) is in clearance fit with the lower fitting surface (131) of the shaft-shoulder-free stirring pin fitting body, the middle fitting surface (132) of the shaft-shoulder-free stirring pin fitting body and the upper fitting surface (133) of the shaft-shoulder-free stirring pin fitting body, and the fit clearances are respectively 0.01mm to 0.06mm, 0.10mm to 0.20mm and 0.01mm to 0.06 mm;
the welding-block-following matching body (32) is in clearance fit with the lower matching surface (131) of the shaft-shoulder-free stirring needle matching body, the middle matching surface (132) of the shaft-shoulder-free stirring needle matching body and the upper matching surface (133) of the shaft-shoulder-free stirring needle matching body, and the matching clearances are respectively 0.01 mm-0.06 mm, 0.10 mm-0.20 mm and 0.01 mm-0.06 mm.
7. The flash-free and shoulder-free friction stir welding tool of claim 1, wherein the pressure plate (2) and the base plate (6) are bolted together.
8. The flash-free and shoulder-free friction stir welding tool with reduced thickness according to claim 1, wherein the shape of the pressure plate (2) and the base plate (6) is adapted to the shape of the workpiece (5).
9. The flash-free and thinned shoulder-free friction stir welding tool according to claim 3, wherein the stepped limiting platform inside the weld block following matching body (32) is matched with the front end shape of the shoulder-free stirring pin matching body (13).
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| CN201921931810.3U CN211248763U (en) | 2019-11-11 | 2019-11-11 | Shaft shoulder-free friction stir welding tool without flash and thinning |
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| CN201921931810.3U CN211248763U (en) | 2019-11-11 | 2019-11-11 | Shaft shoulder-free friction stir welding tool without flash and thinning |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110814509A (en) * | 2019-11-11 | 2020-02-21 | 航天工程装备（苏州）有限公司 | Flanging-free and thinning shaft shoulder-free friction stir welding tool and method |
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2019
- 2019-11-11 CN CN201921931810.3U patent/CN211248763U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110814509A (en) * | 2019-11-11 | 2020-02-21 | 航天工程装备（苏州）有限公司 | Flanging-free and thinning shaft shoulder-free friction stir welding tool and method |
| CN110814509B (en) * | 2019-11-11 | 2023-10-20 | 航天工程装备（苏州）有限公司 | Non-flange and thinned non-shoulder friction stir welding tool and method |
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