CN210548813U - Friction stir welding stirring head structure and friction stir welding device - Google Patents
Friction stir welding stirring head structure and friction stir welding device Download PDFInfo
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- CN210548813U CN210548813U CN201921193050.0U CN201921193050U CN210548813U CN 210548813 U CN210548813 U CN 210548813U CN 201921193050 U CN201921193050 U CN 201921193050U CN 210548813 U CN210548813 U CN 210548813U
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Abstract
The utility model discloses a friction stir welding stirs first structure and friction stir welding device relates to the welding field. The stirring head structure of the friction stir welding comprises a cylindrical base; one end of the stirring needle extends into the base from one end of the base and is detachably connected with the base; wherein, the base includes the shaft shoulder, and the shaft shoulder is located the one end that the base is close to the stirring needle, is provided with at least one recess on the shaft shoulder, and the bottom surface of recess is the inclined plane of a gradual downward sloping on the direction of rotation of shaft shoulder to make the metal of moulding flow form around the welding seam flow to the inside and the intensive mixing of welding seam under the pressure effect of shaft shoulder when the stirring head uses self axis to carry out friction stir welding as the rotation of axes, thereby improve the intensity of welding seam. The utility model also provides a friction stir welding device, including above-mentioned friction stir welding stirring head structure. The utility model discloses can not only reduce welding cost, can also improve welding quality.
Description
Technical Field
The utility model relates to a welding field especially relates to a friction stir welding stirs head structure and friction stir welding device.
Background
At present, in the field of welding of parts with large thickness, plasma arc welding and A-TIG (active flux tungsten inert gas welding) are generally adopted, and a weld joint formed after welding is stable in quality and good in performance.
However, in the a-TIG welding, on the premise of satisfying joint quality, for different kinds of metal materials, the surface active flux needs to be specially developed and prepared to satisfy use requirements, and since the development cycle of the active flux is long, the problem of high cost is caused.
Meanwhile, a special vacuum/protective gas environment is needed during plasma welding, a vacuum operation chamber with enough large space size needs to be built for certain large-scale parts, and meanwhile, a large amount of time is needed for vacuumizing operation before each welding, so that the manufacturing cost is greatly increased.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a friction stir welding stirs head structure that can reduce welding cost.
Another object of the present invention is to provide a friction stir welding tool structure capable of improving welding quality.
An object of the second aspect of the present invention is to provide a friction stir welding device, the friction stir welding device includes the friction stir welding head structure described above, the friction stir welding head structure can reduce the welding cost.
According to the utility model discloses an aspect, the utility model provides a friction stir welding stirs head structure, include:
a cylindrical base; and
one end of the stirring pin extends into the base from one end of the base and is detachably connected with the base;
the base comprises a shaft shoulder, the shaft shoulder is located at one end, close to the stirring needle, of the base, at least one groove is formed in the shaft shoulder, the bottom surface of the groove is an inclined surface gradually inclining downwards in the rotating direction of the shaft shoulder, and therefore when the stirring head rotates with the axis of the stirring head as a shaft to perform friction stir welding, metal in a shape of flowing around a welding seam flows into the welding seam under the pressure action of the shaft shoulder and is fully mixed, and therefore the strength of the welding seam is improved.
Further, the recess includes first lateral wall, second lateral wall and the third lateral wall that end to end connects in order, the one end of first lateral wall is close to the stirring pin, its other end with the circular arc edge of base is connected, the one end of second lateral wall with the one end of first lateral wall is connected, the other end of second lateral wall with the circular arc edge of base is connected, the third lateral wall with the circular arc edge partial coincidence of base.
Further, the height of the first side wall is smaller than that of the second side wall, so that the bottom surface of the groove is an inclined surface gradually inclined downwards in the rotating direction of the shaft shoulder.
Further, the first side wall and the second side wall are both arc-shaped, and the concave-convex directions of the first side wall and the second side wall are consistent.
Furthermore, a plurality of grooves are uniformly distributed on the shaft shoulder at intervals.
Furthermore, one end of the stirring pin is cylindrical, the other end of the stirring pin is frustum-shaped, and threads are arranged on the circumferential surface of the frustum-shaped.
Further, be provided with on the base with the stirring needle the size assorted stirring pinhole of columniform one end, the stirring needle the columniform one end stretches into the stirring pinhole, with the base is connected.
Further, still be provided with on the base with stirring pinhole vertically pin hole, pin hole with stirring pinhole intercommunication, the stirring needle with be provided with the fixed orifices on the position that the pin hole corresponds, pass through the pin hole with the fixed orifices, with will the base with the connection can be dismantled to the stirring needle.
According to the utility model discloses a second aspect, the utility model provides a friction stir welding device, friction stir welding device includes the aforesaid friction stir welding stirs head structure.
The utility model discloses a friction stir welding stirs head structure and friction stir welding device follows through the one end of stirring needle the one end of base stretches into the inside of base and with the connection can be dismantled to the base. Therefore, the consumable part in friction stir welding is only the stirring pin, from this, need to develop special active welding agent for A-TIG among the prior art welds to and plasma welding need build great real empty room and a large amount of time evacuation and make the welding cost show and increase, the utility model discloses can show reduction welding cost.
Further, at least one groove is formed in the shaft shoulder, the bottom surface of the groove is an inclined surface gradually inclining downwards in the rotating direction of the shaft shoulder, so that when the stirring head rotates by taking the axis of the stirring head as an axis to perform friction stir welding, metal in a shape of flowing around the welding seam flows into the welding seam under the pressure action of the shaft shoulder and is fully mixed, and the strength of the welding seam is improved. So, when the metal flow direction of moulding flow form around the welding seam the inside of welding seam and intensive mixing under the effect of stirring needle to when the cooling formed the solid, it formed onion ring organizational structure, and this structure crystalline grain size is little and more compact, therefore the welding seam of final formation not only warp for a short time, and intensity is higher moreover, consequently, the utility model discloses can greatly improve the quality of welding seam.
Drawings
Some specific embodiments of the present invention will be described in detail hereinafter, by way of illustration and not by way of limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a schematic perspective view of a friction stir welding tool structure according to one embodiment of the present invention;
FIG. 2 is a schematic diagram of a friction stir welding tool structure according to an embodiment of the present invention;
FIG. 3 is a schematic perspective view of a pin according to one embodiment of the present invention;
fig. 4 is a schematic partial cross-sectional view of a base according to an embodiment of the invention.
Detailed Description
In the friction stir welding, friction heat is generated between a stirring head and a welded part, so that metal reaches a plastic flowing state, and a welding seam with small deformation and stable quality is formed. The generation of the friction heat is mainly concentrated on 2 aspects, one is the friction heat of the stirring pin and the material, and the other is the friction heat of the shaft shoulder and the material. And generating friction heat to enable metal materials inside and around the welding seam to form a plastic flowing state, filling the welding seam with the flowing metal, and finishing welding connection after the welding seam is cooled to form a solid.
Fig. 1 is a perspective schematic view of a friction stir welding head structure according to an embodiment of the present invention, fig. 2 is a schematic view of a friction stir welding head structure according to an embodiment of the present invention, the arrow direction in fig. 1 represents a rotation direction of the friction stir welding head, the arrow direction in fig. 2 represents a flow direction of a metal in a plastic flow state, and the position of the arrow is a weld seam. As shown in FIG. 1, the friction stir welding tool structure includes a cylindrical base 1 and a stir pin 2. One end of the stirring pin 2 extends into the base 1 from one end of the base 1 and is detachably connected with the base. The base 1 comprises a shaft shoulder 11, the shaft shoulder 11 is located at one end of the base 1 close to the stirring pin 2, at least one groove 12 is arranged on the shaft shoulder 11, the bottom surface of the groove 12 is an inclined surface which gradually inclines downwards in the rotation direction of the shaft shoulder, so that when the stirring head rotates by taking the axis of the stirring head as the shaft to perform friction stir welding, as shown in fig. 2, metal which is in a shape of flowing around the welding seam 3 flows to the inside of the welding seam 3 under the pressure action of the shaft shoulder 11 and is fully mixed, and the strength of the welding seam 3 is improved.
The utility model discloses a friction stir welding stirs head structure follows through the one end of stirring needle 2 the one end of base 1 stretches into the inside of base 1 and with base 1 can dismantle the connection. Therefore, the consumable part in friction stir welding is only the stirring pin, from this, need to develop special active welding agent for A-TIG among the prior art welds to and plasma welding need build great real empty room and a large amount of time evacuation and make the welding cost show and increase, the utility model discloses can show reduction welding cost.
Further, by providing at least one groove 12 on the shoulder 11, the bottom surface of the groove 12 is an inclined surface gradually inclined downwards in the rotation direction of the shoulder 11, so that when the stir head rotates around its own axis as an axis for friction stir welding, the metal flowing around the weld bead flows to the inside of the weld bead 3 under the pressure of the shoulder 11 and is sufficiently mixed, thereby improving the strength of the weld bead. So, when the metal flow direction of moulding flow form around the welding seam the inside of welding seam and intensive mixing under the effect of stirring needle 2 to when the cooling formed the solid, it formed onion ring organizational structure, and this structure crystalline grain size is little and more compact, therefore the welding seam of final formation not only warp for a short time, and intensity is higher moreover, consequently, the utility model discloses can greatly improve the quality of welding seam.
Further, as shown in fig. 1, the groove 12 is substantially triangular. Recess 12 includes first lateral wall 13, second lateral wall 14 and third lateral wall 17 that end to end connects in order, the one end of first lateral wall 13 is close to stirring needle 2, its other end with the circular arc edge of base 1 is connected, the one end of second lateral wall 14 with the one end of first lateral wall 13 is connected, the other end of second lateral wall 14 with the circular arc edge of base 1 is connected, third lateral wall 17 with the circular arc edge partial coincidence of base 1. Meanwhile, as shown in fig. 1, the height of the first sidewall 13 is smaller than that of the second sidewall 14, so that the bottom surface of the groove 12 is an inclined surface gradually inclined downward in the rotation direction of the shoulder 11. As shown in fig. 1, the first side wall 13 and the second side wall 14 are both arc-shaped, and the concave-convex directions of the first side wall 13 and the second side wall 14 are the same.
It can be seen from figure 1 that recess 12 is fan blade shape in fact wholly, simultaneously the utility model discloses a design principle is similar with the principle that the fan bloied, through setting recess 12 to fan blade shape, when rotatory, the welding seam 3 metal on every side of stirring head melts, and molten metal just can be under recess 12's effect to the inside motion of welding seam 3 to intensive mixing under the effect of stirring pin 2 finally improves the intensity of welding seam 3.
Further, as shown in fig. 1, a plurality of the grooves 12 are uniformly arranged on the shoulder 11 at intervals. Therefore, the metal which is beneficial to shaping and flowing around the welding seam 3 enters the welding seam 3 more, and the strength of the welding seam 3 is further improved.
Further, fig. 3 is a schematic perspective view of a mixing pin according to an embodiment of the present invention. As shown in fig. 3, one end of the stirring pin 2 is cylindrical, and the other end is frustum-shaped, and a circumferential surface of the frustum-shaped is provided with a thread 21.
Meanwhile, fig. 4 is a partially sectional schematic view of a base according to an embodiment of the present invention. As shown in fig. 4, a stirring pin hole 15 is provided on the base 1, and the size of the cylindrical end of the stirring pin 2 is matched with that of the stirring pin hole 15, and the cylindrical end of the stirring pin 2 extends into the stirring pin hole 15 to be connected with the base 1.
Specifically, as shown in fig. 4, a pin hole 16 perpendicular to the pin hole 15 is further disposed on the base 1, the pin hole 16 is communicated with the pin hole 15, a fixing hole (not shown in the figure) is disposed at a position of the pin 2 corresponding to the pin hole 16, and a pin passes through the pin hole 16 and the fixing hole, so that the base 1 and the pin 2 are detachably connected. At the same time, the base 1 and the pin 2 can be synchronously rotated together without mutual displacement by the pin passing through the pin hole 16 and the fixing hole.
Here, the material of the stirring pin 2 may be a high temperature alloy GH4169, and a quenching treatment is performed after machining. The material of the base 1 may be 45# steel and may be conditioned.
Meanwhile, friction stir welding is adopted, so that splashing, sparks and toxic and harmful gas are not generated during welding, and nonferrous metal and ferrous metal with the thickness of 5-10 mm or dissimilar metal with large physical property difference can be welded and combined. Meanwhile, the welding cost is relatively low as mentioned above, so that the method can be applied to mass industrial application.
Furthermore, in an embodiment of the present invention, a friction stir welding device is further provided, wherein the friction stir welding device includes the friction stir welding structure described above.
Because friction stir welding device includes the aforesaid friction stir welding stirs first structure, consequently follow through the one end of stirring needle 2 the one end of base 1 stretches into the inside of base 1 and with base 1 can dismantle the connection. Therefore, the consumable part in friction stir welding is only the stirring pin, from this, need to develop special active welding agent for A-TIG among the prior art welds to and plasma welding need build great real empty room and a large amount of time evacuation and make the welding cost show and increase, the utility model discloses can show reduction welding cost.
Further, by providing at least one groove 12 on the shoulder 11, the bottom surface of the groove 12 is an inclined surface gradually inclined downwards in the rotation direction of the shoulder 11, so that when the stir head rotates around its own axis as an axis for friction stir welding, the metal flowing around the weld bead flows to the inside of the weld bead 3 under the pressure of the shoulder 11 and is sufficiently mixed, thereby improving the strength of the weld bead. So, when the metal flow direction of moulding flow form around the welding seam the inside of welding seam and intensive mixing under the effect of stirring needle 2 to when the cooling formed the solid, it formed onion ring organizational structure, and this structure crystalline grain size is little and more compact, therefore the welding seam of final formation not only warp for a short time, and intensity is higher moreover, consequently, the utility model discloses can greatly improve the quality of welding seam.
Thus, it should be understood by those skilled in the art that while exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations and modifications can be made in accordance with the principles of the invention without departing from the spirit and scope of the invention, which is broadly defined and defined herein. Accordingly, the scope of the present invention should be understood and interpreted to cover all such other variations or modifications.
Claims (9)
1. A friction stir welding tool head structure, comprising:
a cylindrical base; and
one end of the stirring pin extends into the base from one end of the base and is detachably connected with the base;
the base comprises a shaft shoulder, the shaft shoulder is located at one end, close to the stirring needle, of the base, at least one groove is formed in the shaft shoulder, the bottom surface of the groove is an inclined surface gradually inclining downwards in the rotating direction of the shaft shoulder, and therefore when the stirring head rotates with the axis of the stirring head as a shaft to perform friction stir welding, metal in a shape of flowing around a welding seam flows into the welding seam under the pressure action of the shaft shoulder and is fully mixed, and therefore the strength of the welding seam is improved.
2. The friction stir welding tool structure of claim 1, wherein the recess includes a first sidewall, a second sidewall, and a third sidewall connected end to end in sequence, one end of the first sidewall is proximate to the pin, the other end of the first sidewall is connected to the circular arc edge of the base, one end of the second sidewall is connected to one end of the first sidewall, the other end of the second sidewall is connected to the circular arc edge of the base, and the third sidewall partially coincides with the circular arc edge of the base.
3. The friction stir welding tool structure of claim 2 wherein the height of the first sidewall is less than the height of the second sidewall such that the bottom surface of the recess is a sloping surface that slopes gradually downward in the direction of rotation of the shoulder.
4. The structure of claim 2, wherein the first sidewall and the second sidewall are both arc-shaped, and the first sidewall and the second sidewall have a same concave-convex direction.
5. The friction stir welding tool structure of claim 1 wherein the plurality of grooves are evenly spaced on the shoulder.
6. The friction stir welding tool structure of claim 1, wherein the pin has a cylindrical shape at one end and a frustoconical shape at the other end, the frustoconical shape having a circumferential surface provided with threads.
7. The friction stir welding tool structure of claim 6 wherein said base is provided with a pin hole that matches the size of said cylindrical end of said pin, said cylindrical end of said pin extending into said pin hole for connection to said base.
8. The structure of claim 7, wherein the base further comprises a pin hole perpendicular to the pin hole, the pin hole is communicated with the pin hole, a fixing hole is disposed at a position of the pin corresponding to the pin hole, and a pin passes through the pin hole and the fixing hole, so as to detachably connect the base and the pin.
9. A friction stir welding apparatus comprising a friction stir welding tool structure according to any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921193050.0U CN210548813U (en) | 2019-07-26 | 2019-07-26 | Friction stir welding stirring head structure and friction stir welding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921193050.0U CN210548813U (en) | 2019-07-26 | 2019-07-26 | Friction stir welding stirring head structure and friction stir welding device |
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| Publication Number | Publication Date |
|---|---|
| CN210548813U true CN210548813U (en) | 2020-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921193050.0U Active CN210548813U (en) | 2019-07-26 | 2019-07-26 | Friction stir welding stirring head structure and friction stir welding device |
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| CN (1) | CN210548813U (en) |
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- 2019-07-26 CN CN201921193050.0U patent/CN210548813U/en active Active
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