CN211219142U - Stirring head with convex-concave matching type stirring pin rotating profile - Google Patents
Stirring head with convex-concave matching type stirring pin rotating profile Download PDFInfo
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- CN211219142U CN211219142U CN201921863928.7U CN201921863928U CN211219142U CN 211219142 U CN211219142 U CN 211219142U CN 201921863928 U CN201921863928 U CN 201921863928U CN 211219142 U CN211219142 U CN 211219142U
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Abstract
The utility model discloses a stirring needle rotation profile convex-concave cooperation type stirring head, including the clamping part, shaft shoulder and the stirring needle that connect gradually, the week side of stirring needle is equipped with the convex part that is used for the increase and welds the area of friction, and week side of stirring needle still is equipped with the concave part that is used for improving depth direction forging pressure, and convex part and concave part are connected. The stirring head has the advantages of simple and reliable structure, capability of improving the strength and increasing the friction area, capability of improving the welding speed, capability of improving the forging pressure and the welding seam strength and forming a good welding seam.
Description
Technical Field
The utility model relates to a friction stir welding technique especially relates to a stirring pin rotation profile convex-concave cooperation type stirring head.
Background
In the process of friction stir welding, the mutual action between the stirring head and the workpiece material generates heat, the workpiece material around the stirring head is heated to a plasticized state to form a welding line, and the heat mainly comprises the friction heat generated between the shaft shoulder, the stirring needle and the base material and the plastic deformation heat generated by stirring and extruding the workpiece material. In the process of friction stir welding, the temperature field of the workpiece is not uniformly distributed, and the rule that the temperature at the shaft shoulder of the stirring head is highest and is sequentially decreased towards the end face of the stirring pin is presented.
The stirring head is the core of the stirring friction welding technology. It interacts with the welded workpiece to realize the connection of the welded material.
The size design of the stirring head has no mature theory, the stirring head is designed mostly according to experience, the stirring head mainly comprises a stirring pin, a shaft shoulder, a clamping area and the like, and the stirring pin is positioned at the top of the stirring head and has different shapes. The stirring pin generates partial heat energy through rotary friction, the main function of the stirring pin is similar to the function of a pump, the stirring pin can enable metal in a high plasticizing state to flow from front to back along the stirring pin while keeping up-and-down movement, and the metal is forged and cooled through a shaft shoulder of the stirring head to form a joint. The size of the stirring pin determines the size and the welding speed of the welding seam welding nuclear area structure; the shape of the stirring pin determines the heating mode and the mode of upsetting the plastic material in the welding process, and directly influences the flowing form of the softened material in the welding seam area, thereby playing an important role in forming the joint. The pin shape and size and related welding process parameters together determine the heat generation and material flow during welding, and ultimately the quality of the friction stir weld joint.
Ordinary stirring head is conical or cylindrical structure generally, and ordinary stirring head is in welding process, because stirring needle surface area is less, and the friction heat production is less, and the plastify weldment time is on the long side, and welding speed can be on the small side, is unfavorable for the improvement of productivity effect. In the friction stir welding occasion of combined material, multilayer material overlap joint or butt joint, it is not enough that the friction heat production easily appears to adopt ordinary stirring head, leads to welding seam district softening material mobility not enough, and the forging pressure is stirred, is unfavorable for forming good welding seam, has certain harmful effects to the welding seam quality.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome prior art not enough, provide a simple structure reliable, can improve intensity and increase friction area, can improve welding speed, can improve forging pressure, can improve welding seam intensity and form the stirring pin rotation profile convex-concave cooperation type stirring head of good welding seam.
In order to solve the technical problem, the utility model discloses a following technical scheme:
the utility model provides a stirring needle rotation profile convex-concave cooperation type stirring head, includes clamping part, shaft shoulder and the stirring needle that connects gradually, the week side of stirring needle is equipped with the convex part that is used for the increase intensity and increases with weldment friction area, week side of stirring needle still is equipped with the concave part that is used for improving depth direction forging pressure, convex part and concave part are connected.
As a further improvement of the above technical solution:
the axial line of the stirring pin is defined as a rotation central line, and the peripheral side outer contour line of the convex part and the concave part is defined as a rotation generatrix, and the convex part and the concave part are formed by rotating the rotation generatrix around the rotation central line.
The diameter of the tip portion of the pin is defined as L1, the diameter of the base portion of the pin is defined as L2, the diameter of the circumferential outer contour of the convex portion is larger than that of L1 and L2, and the circumferential outer contour of the concave portion is between L1 and L2.
The diameter L1 of the needle tip is smaller than the diameter L2 of the needle root.
The peripheral side outer contour lines of the convex part and the concave part are formed by connecting an outer convex arc line and an inner concave arc line.
The outer convex arc line is close to the root part of the needle, and the inner concave arc line is close to the tip part of the needle.
The outer convex arc line is close to the needle tip part, and the inner concave arc line is close to the needle root part.
The peripheral side outer contour lines of the convex portions and the concave portions are formed by connecting circular arc lines and oblique lines.
The peripheral side outer contour line of the convex part and the concave part is formed by connecting an outer convex arc line and an oblique line.
The outer convex arc line is close to the root part of the needle, the oblique line is close to the tip part of the needle, and the oblique line forms a concave part.
The peripheral side outer contour lines of the convex parts and the concave parts are formed by connecting concave circular arc lines and oblique lines.
The concave arc line is close to the needle tip part, the oblique line is close to the needle root part, and the oblique line forms a convex part.
The peripheral side outer contour lines of the convex portions and the concave portions are formed by alternately connecting a plurality of sections of circular arc lines and a plurality of sections of straight lines.
The adjacent circular arc lines and the straight lines are connected to form an inner groove and an outer boss, and the inner groove and the outer boss are alternately arranged.
The peripheral side outer contour of the convex portion and the concave portion is formed by alternately connecting a plurality of straight lines.
And adjacent straight line sections are connected to form an inner groove and an outer boss, and the inner groove and the outer boss are alternately arranged.
Compared with the prior art, the utility model has the advantages of:
the utility model discloses the convex-concave cooperation type stirring head of stirring needle rotation profile, including clamping part, shaft shoulder and the stirring needle that connects gradually, the week side of stirring needle is equipped with the convex part that is used for improving intensity and increases with weldment friction area, and week side of stirring needle still is equipped with the concave part that is used for improving depth direction forging pressure, and convex part and concave part are connected. During welding, the clamping part is used for clamping, the stirring pin generates heat energy through rotary friction, and the shaft shoulder part is used for forming forging and pressing. Compared with the traditional structure, the stirring head is provided with the convex part and the concave part which are connected with each other on the peripheral side of the stirring pin, namely, the peripheral side outline of the stirring pin is matched with the convex part and the concave part in a convex way, the convex part enables the strength of the stirring pin to be improved, and the welding speed is improved; meanwhile, the surface area of the stirring pin is increased by the convex part, so that the friction area with a welding piece is increased, the flowing of materials is facilitated, the welding speed is also facilitated to be improved, and the production benefit is improved; the forging pressure in the depth direction of the inner part is increased by the concave part, so that the compactness of the welding line can be increased, the strength of the welding line is increased, and the quality of the welding line is improved; meanwhile, the concave part increases the surface area of the stirring pin and reduces the volume, so that the friction area with a weldment is increased, the flowing filling of materials is facilitated, and a good welding seam is favorably formed; the structure is simple and reliable.
Drawings
Fig. 1 is a schematic perspective view of embodiment 1 of the present invention.
Fig. 2 is a schematic front view of embodiment 1 of the present invention.
Fig. 3 is a schematic diagram of a partially enlarged structure of embodiment 1 of the present invention.
Fig. 4 is a schematic structural view of a stirring pin in embodiment 1 of the present invention.
Fig. 5 is a schematic structural view of a stirring pin in embodiment 2 of the present invention.
Fig. 6 is a schematic structural view of a stirring pin in embodiment 3 of the present invention.
Fig. 7 is a schematic structural view of a stirring pin in embodiment 4 of the present invention.
Fig. 8 is a schematic structural view of a stirring pin in embodiment 5 of the present invention.
Fig. 9 is a schematic structural view of a stirring pin in embodiment 6 of the present invention.
The reference numerals in the figures denote:
1. a clamping portion; 2. a shaft shoulder; 3. a stirring pin; 31. a convex portion; 32. a recess; 33. a center line of rotation; 34. rotating the bus; 35. a needle tip portion; 36. a needle root; 37. an inner groove; 38. an outer boss.
Detailed Description
The invention will be described in further detail with reference to the drawings and specific examples.
Example 1:
fig. 1 to 4 show a first embodiment of a stirring pin rotating contour convex-concave fitting type stirring head according to the present invention, which includes a clamping portion 1, a shaft shoulder portion 2 and a stirring pin 3 connected in sequence, wherein a convex portion 31 for improving strength and increasing friction area with a weldment is provided on the periphery side of the stirring pin 3, a concave portion 32 for improving forging pressure in the depth direction is further provided on the periphery side of the stirring pin 3, and the convex portion 31 and the concave portion 32 are connected. During welding, the clamping part 1 is used for clamping, the stirring pin 3 generates heat energy through rotary friction, and the shaft shoulder part 2 is used for forging. Compared with the traditional structure, the stirring head is provided with the convex part 31 and the concave part 32 which are connected with each other on the peripheral side of the stirring pin 3, namely, the peripheral side outer contour line of the stirring pin 3 is matched with the convex part and the concave part, the convex part 31 improves the strength of the stirring pin 3, and is beneficial to improving the welding speed; meanwhile, the convex part 31 increases the surface area of the stirring pin 3, thereby increasing the friction area with a weldment, being beneficial to the flowing of materials, being beneficial to improving the welding speed and improving the production benefit; the forging pressure in the depth direction of the inner part is increased by the concave part 32, so that the compactness of a welding seam can be increased, the strength of the welding seam is increased, and the quality of the welding seam is improved; meanwhile, the concave part 32 increases the surface area of the stirring pin 3 and reduces the volume, so that the friction area with a weldment is increased, the flowing filling of materials is facilitated, and a good welding seam is favorably formed; the structure is simple and reliable, and is suitable for composite materials, thick plates, lap welds, dissimilar metal connections, multilayer lap and butt welds.
In the present embodiment, the axis of the probe 3 is defined as a rotation center line 33, the circumferential outer contour of the convex portion 31 and the concave portion 32 is defined as a rotation generatrix 34, and the convex portion 31 and the concave portion 32 are formed by rotating the rotation generatrix 34 around the rotation center line 33. The convex portion 31 and the concave portion 32 are integrally formed by rotating the rotation generatrix 34 around the rotation center line 33, and the overall strength is improved.
In the present embodiment, the diameter of the needle tip portion 35 of the probe 3 is defined as L1, the diameter of the needle root portion 36 of the probe 3 is defined as L2, the diameter of the circumferential side outer contour of the convex portion 31 is larger than that of L1 and L2, and the circumferential side outer contour of the concave portion 32 is between L1 and L2. Namely, the peripheral side outer contour line of the convex part 31 is always positioned outside the connecting line of the outer contour of the needle tip part 35 and the outer contour of the needle root part 36, thereby improving the strength of the stirring needle 3; the circumferential outer contour of the concave portion 32 is always located within the connecting line of the outer contour of the needle tip portion 35 and the outer contour of the needle root portion 36, thereby increasing the forging pressure in the inner depth direction.
In this embodiment, the diameter L1 of the needle tip 35 is smaller than the diameter L2 of the needle root 36. The whole stirring needle 3 is in a conical structure due to the arrangement, and the forging pressure is further improved.
In the present embodiment, the circumferential outer contour of the convex portion 31 and the concave portion 32 is formed by connecting an outer arc line and an inner arc line. In this structure, the circumferential outer contour of each of the convex portion 31 and the concave portion 32 is formed of a single curve, and the structure is simple and easy to mold.
In this embodiment, the outward arc line is near the needle root 36 and the inward arc line is near the needle tip 35. The structure is simple and easy.
Example 2:
as shown in fig. 5, the second embodiment of the stirring pin rotating contour convex-concave matching type stirring head of the present invention is substantially the same as that of embodiment 1, except that: in this embodiment, the outward arc line is close to the needle tip portion 35, and the inward arc line is close to the needle root portion 36. The structure is simple and easy.
Example 3:
as shown in fig. 6, the third embodiment of the stirring pin rotating contour convex-concave matching type stirring head of the present invention is substantially the same as that of embodiment 1, except that: in the present embodiment, the circumferential outer contour of the convex portion 31 and the concave portion 32 is formed by connecting a circular arc line and a diagonal line. In this configuration, the circumferential outer contour of the convex portion 31 and the concave portion 32 is formed by a combination of curved oblique lines, and the structure is simple and reliable.
In the present embodiment, the circumferential outer contour of the convex portion 31 and the concave portion 32 is formed by connecting an outer arc line and a diagonal line. The structure is simple and easy.
In this embodiment, the outer convex circular arc line is close to the needle root 36, the oblique line is close to the needle tip 35, and the oblique line forms the concave portion 32. The structure is simple and easy.
Example 4:
as shown in fig. 7, the fourth embodiment of the stirring pin rotating contour convex-concave matching type stirring head of the present invention is substantially the same as embodiment 3, except that: in the present embodiment, the circumferential outer contour of the convex portion 31 and the concave portion 32 is formed by connecting an inner concave circular arc line and a slant line. The structure is simple and easy.
In this embodiment, the concave circular arc line is close to the needle tip portion 35, the oblique line is close to the needle root portion 36, and the oblique line forms the convex portion 31. The structure is simple and easy.
Example 5:
as shown in fig. 8, a fifth embodiment of the stirring pin rotating contour convex-concave matching type stirring head of the present invention is substantially the same as embodiment 1, except that: in the present embodiment, the circumferential outer contour of the convex portion 31 and the concave portion 32 is formed by alternately connecting a plurality of circular arcs and a plurality of straight lines. In this structure, the circumferential outer contour of the convex portion 31 and the concave portion 32 is formed by alternately connecting a plurality of circular arcs and a plurality of straight lines, and the strength is improved and the forging pressure in the inner depth direction is further improved.
In this embodiment, the adjacent circular arcs and straight lines are connected to form the inner grooves 37 and the outer bosses 38, and the inner grooves 37 and the outer bosses 38 are alternately arranged. Namely, a step structure with convex-concave matching is formed, the strength is improved, and the forging pressure in the inner depth direction is further improved.
Example 6:
as shown in fig. 9, the stirring pin of the sixth embodiment of the stirring pin rotating contour convex-concave fitting type stirring head of the present invention is substantially the same as that of embodiment 5, except that: in the present embodiment, the circumferential outer contour of the convex portion 31 and the concave portion 32 is formed by alternately connecting a plurality of straight lines. The circumferential outer contour of the convex portion 31 and the concave portion 32 is formed by alternately connecting a plurality of straight lines, and the forging pressure in the inner depth direction is further increased while the strength is increased.
In this embodiment, adjacent straight line segments are connected to form inner grooves 37 and outer bosses 38, and the inner grooves 37 and the outer bosses 38 are alternately arranged. Namely, a step structure with convex-concave matching is formed, the strength is improved, and the forging pressure in the inner depth direction is further improved.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The technical solution of the present invention can be used by anyone skilled in the art to make many possible variations and modifications, or to modify equivalent embodiments, without departing from the scope of the technical solution of the present invention, using the technical content disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention should fall within the protection scope of the technical solution of the present invention.
Claims (16)
1. The utility model provides a stirring needle rotation profile convex-concave cooperation type stirring head, includes clamping part (1), shaft shoulder (2) and stirring needle (3) that connect gradually, its characterized in that: the circumferential side of the stirring pin (3) is provided with a convex part (31) for improving the strength and increasing the friction area with a weldment, the circumferential side of the stirring pin (3) is further provided with a concave part (32) for improving the forging pressure in the depth direction, and the convex part (31) is connected with the concave part (32).
2. The pin tumbler according to claim 1, wherein: the axis of the stirring pin (3) is defined as a rotation center line (33), the peripheral side outer contour line of the convex part (31) and the concave part (32) is defined as a rotation generatrix (34), and the convex part (31) and the concave part (32) are formed by the rotation generatrix (34) rotating around the rotation center line (33).
3. The pin tumbler according to claim 2, wherein: the diameter of the tip portion (35) of the probe (3) is defined as L1, the diameter of the root portion (36) of the probe (3) is defined as L2, the diameter of the circumferential outer contour of the convex portion (31) is larger than that of L1 and L2, and the circumferential outer contour of the concave portion (32) is between L1 and L2.
4. The pin tumbler according to claim 3, wherein: the diameter L1 of the needle tip (35) is smaller than the diameter L2 of the needle root (36).
5. The pin tumbler according to claim 3 or 4, wherein the pin tumbler has a convex-concave profile, and wherein: the peripheral side outer contour lines of the convex part (31) and the concave part (32) are formed by connecting an outer convex arc line and an inner concave arc line.
6. The pin tumbler according to claim 5, wherein: the outer convex arc line is close to the needle root part (36), and the inner concave arc line is close to the needle tip part (35).
7. The pin tumbler according to claim 5, wherein: the outer convex arc line is close to the needle tip part (35), and the inner concave arc line is close to the needle root part (36).
8. The pin tumbler according to claim 3 or 4, wherein the pin tumbler has a convex-concave profile, and wherein: the peripheral side outer contour line of the convex part (31) and the concave part (32) is formed by connecting an arc line and a diagonal line.
9. The pin tumbler according to claim 8, wherein: the peripheral side outer contour line of the convex part (31) and the concave part (32) is formed by connecting an outer convex arc line and a diagonal line.
10. The pin tumbler according to claim 9, wherein: the outer convex arc line is close to the needle root part (36), the oblique line is close to the needle tip part (35), and the oblique line forms a concave part (32).
11. The pin tumbler according to claim 8, wherein: the peripheral side outer contour line of the convex part (31) and the concave part (32) is formed by connecting an inner concave arc line and a slant line.
12. The pin tumbler according to claim 11, wherein: the concave circular arc line is close to the needle tip part (35), the oblique line is close to the needle root part (36), and the oblique line forms a convex part (31).
13. The pin rotation profile male-female fit type mixing head according to any one of claims 1 to 4, wherein: the peripheral side outer contour line of the convex part (31) and the concave part (32) is formed by alternately connecting a plurality of sections of circular arc lines and a plurality of sections of straight lines.
14. The pin tumbler according to claim 13, wherein: the adjacent circular arc lines and the straight lines are connected to form an inner groove (37) and an outer boss (38), and the inner groove (37) and the outer boss (38) are alternately arranged.
15. The pin rotation profile male-female fit type mixing head according to any one of claims 1 to 4, wherein: the peripheral side outer contour of the convex portion (31) and the concave portion (32) is formed by alternately connecting a plurality of straight lines.
16. The pin tumbler according to claim 15, wherein: adjacent straight line segments are connected to form inner grooves (37) and outer bosses (38), and the inner grooves (37) and the outer bosses (38) are alternately arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921863928.7U CN211219142U (en) | 2019-10-31 | 2019-10-31 | Stirring head with convex-concave matching type stirring pin rotating profile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921863928.7U CN211219142U (en) | 2019-10-31 | 2019-10-31 | Stirring head with convex-concave matching type stirring pin rotating profile |
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| Publication Number | Publication Date |
|---|---|
| CN211219142U true CN211219142U (en) | 2020-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921863928.7U Active CN211219142U (en) | 2019-10-31 | 2019-10-31 | Stirring head with convex-concave matching type stirring pin rotating profile |
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|---|---|
| CN (1) | CN211219142U (en) |
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