CN211331778U

CN211331778U - Novel stirring head

Info

Publication number: CN211331778U
Application number: CN201922033992.9U
Authority: CN
Inventors: 孙占国
Original assignee: Beijing Sooncable Technology Development Co ltd
Current assignee: Beijing shijiabo Technology Group Co.,Ltd.
Priority date: 2019-11-21
Filing date: 2019-11-21
Publication date: 2020-08-25
Anticipated expiration: 2029-11-21

Abstract

The utility model belongs to the technical field of friction stir welding equipment, specifically provide a novel stirring head, including coaxial clamping area, transition district and the functional area that connects in order, the clamping area with the transition district is cylindrical structure, the functional area is the toper structure, the functional area includes shaft shoulder and stirring needle, the shaft shoulder is the toper structure, the main aspects of shaft shoulder is connected with the transition district, the tip of shaft shoulder with the stirring needle is connected, be provided with the forced air cooling heat dissipation structure on the transition district; the utility model discloses a novel stirring head structure is simple reasonable, through set up the forced air cooling heat radiation structure on the transition district at the stirring head, can accelerate the heat dissipation of functional area effectively, reduces the temperature in functional area, and the stirring head is under the better condition of heat dissipation, and operating temperature lowers, and yield strength improves, can reduce the deformation of wearing and tearing and stirring needle simultaneously, has prolonged the life of stirring head, has reduced the consume expense of stirring head.

Description

Novel stirring head

Technical Field

The utility model belongs to the technical field of friction stir welding equipment, concretely relates to novel stirring head.

Background

The stir head is considered to be the "heart" of friction stir welding and is a key workpiece for the smooth execution of friction stir welding. In the friction stir welding process, a stirring head rotating at a high speed is inserted into a joint of workpieces, and the stirring head rubs with the materials of the welded workpieces, so that the temperature of the materials at the connecting part is raised and softened. The softened material is rotated and stirred along the stirring head under the action of the stirring head to form a compact joint.

Similar to conventional machining tools, the mixing head is also a consumable item. The stirring head can bear larger compression load and anti-shearing load in a high-temperature state in the welding process, and as a stress concentration point of the stirring head, the root of the stirring pin is easy to break, which is also the main reason of the failure of the stirring head. Meanwhile, according to a creep mechanism, a stirring pin of the stirring head is easy to generate residual deformation and a shaft shoulder is easy to generate fatigue corrosion pits under high-temperature dynamic load. After the stirring head is used for a period of time, the phenomena of obvious peeling and unsmooth welding seam surface can occur. The stirring head with serious corrosion can generate obvious 'pits' inside the shaft shoulder, and defects can be generated inside the welding line at the moment, so that the quality of the welding line is influenced. Therefore, lowering the temperature of the working area of the stirring head or accelerating the heat dissipation of the stirring head becomes the key for providing the performance of the stirring head. The conventional stirring head is also added with some heat dissipation rings and other features on the surface, but the heat dissipation effect is not obvious.

SUMMERY OF THE UTILITY MODEL

In order to solve the above-mentioned problem that prior art exists, the utility model provides a novel stirring head, the poor welding quality that leads to of stirring head radiating effect to prior art friction welding usefulness is poor, the condition that stirring head life is short and research and development, and simple structure is reasonable, has prolonged the life of stirring head, has improved the welding seam quality, has reduced the consume expense of stirring head.

The utility model discloses a following technical scheme specifically realizes:

the utility model discloses a novel stirring head, including coaxial centre gripping district, transition district and the functional area of connecting in order, the centre gripping district with the transition district is cylindrical structure, the functional area is the toper structure, the functional area includes shaft shoulder and stirring needle, the shaft shoulder is the toper structure, the main aspects and the transition district of shaft shoulder are connected, the tip of shaft shoulder with the stirring needle is connected, be provided with air-cooled heat radiation structure in the transition district.

Further, the air-cooled heat dissipation structure comprises a plurality of first heat dissipation holes, and all the first heat dissipation holes are uniformly distributed along the circumferential direction of the transition region.

Furthermore, the first heat dissipation hole is provided with an air inlet on the outer wall of the transition area, and an included angle is formed between the orientation of the air inlet and the rotation direction of the stirring head and is an acute angle.

Furthermore, the air-cooled heat dissipation structure comprises a plurality of air guide grooves, and all the air guide grooves are uniformly distributed along the circumferential direction of the transition area.

Furthermore, the air guide groove is provided with an air inlet on the outer wall of the transition area, an included angle is formed between the orientation of the air inlet and the rotation direction of the stirring head, and the included angle is an acute angle.

Further, a second heat dissipation hole is formed in the shaft shoulder.

Further, a central cooling hole is formed in the end wall of the clamping area.

Optionally, a circulating water cooling pipe is arranged in the central cooling hole.

Optionally, a heat dissipation pipe is arranged in the central cooling hole.

Further, the stirring head is formed by integrally forming the clamping area, the transition area and the functional area.

Based on above technical scheme, the utility model discloses a technological effect does:

the utility model discloses a novel stirring head structure is simple reasonable, on the basis of the stirring head that traditional friction welding used, sets up air-cooled heat radiation structure on the transition region of stirring head to the heat dissipation of stirring head functional area with higher speed reduces the temperature of the functional area of stirring head in the welding process, thereby improves the yield strength of stirring needle, reduces the corrosive action in counter shaft shoulder district, reduces the wearing and tearing in functional area, and then improves the life of stirring head, improves the shaping quality of welding seam.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of the novel stirring head of example 1;

FIG. 2 is a schematic view of a cooling structure of embodiment 1;

FIG. 3 is a schematic view of another cooling structure of embodiment 1;

FIG. 4 is a schematic structural view of the novel stirring head of example 2;

FIG. 5 is a schematic sectional view of a transition region in example 2.

In the figure:

1-a clamping zone; 2-a transition zone; 3-functional zone, 301-shaft shoulder, 302-stirring pin; 4-a first heat dissipation hole; 5-air guide groove; 6-second heat dissipation hole; 7-central cooling hole; 8-circulating water cooling pipes; 9-radiating pipe.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Example 1:

as shown in fig. 1-3, this embodiment provides a novel stirring head, including coaxial clamping area 1, transition area 2 and the functional area 3 of connecting in order, the stirring head does clamping area 1 transition area 2 with 3 integrated into one piece in the functional area form clamping area 1 with transition area 2 is cylindrical structure, functional area 3 is the toper structure, functional area 3 includes shaft shoulder 301 and stirring needle 302, shaft shoulder 301 is the toper structure, shaft shoulder 301's main aspects are connected with transition area 2, shaft shoulder 301's tip with stirring needle 302 is connected, be provided with air-cooled heat radiation structure on the transition area 2.

In this embodiment, the air-cooling heat dissipation structure includes a plurality of first heat dissipation holes 4, and all the first heat dissipation holes 4 are uniformly distributed along the circumferential direction of the transition region 2.

The novel stirring head of this embodiment is when specifically using, and the cavity that is used for inserting the centre gripping district 1 of establishing the stirring head is inwards offered to friction weld's centre gripping handle bottom, the cavity with 1 clearance fit in centre gripping district, in the stir welding process, the high-speed rotation of stirring head, centre gripping district 1, transition district 2 and 3 integrated into one piece in functional area, through the first louvre 4 of transition district 2, can accelerate the heat dissipation of functional area 3 effectively, reduce the temperature of functional area 3. Compare in traditional friction welding and use the stirring head, the novel stirring head of this embodiment is under the better condition of heat dissipation, and operating temperature is lower, and yield strength improves, simultaneously can reduce wear and tear with the deformation of stirring needle 302 effectively reduces the heat transfer of functional area 3 to the lathe main shaft, has reduced the temperature rise of main shaft.

As a better choice, first louvre 4 is in the air intake has on the outer wall of transition zone 2, the air intake orientation with the contained angle has between the direction of rotation of stirring head, the contained angle is the acute angle for when the stirring head was rotatory at high speed, the air can get into first louvre 4 fast and take away the heat of stirring head, thereby realizes that stirring head and surrounding air carry out the heat exchange fast, and heat dissipation, cooling effect are obvious.

As a further improvement of this embodiment, the shaft shoulder 301 is provided with a second heat dissipation hole 6, so as to further improve the heat dissipation effect of the stirring head.

As a further improvement of this embodiment, the end wall of the clamping area 1 is further provided with a central cooling hole 7, and the central cooling hole 7 can also increase the contact area between the stirring head and the surrounding air, thereby improving the heat dissipation effect of the stirring head. As a better option, a cooling structure can be arranged in the central cooling hole 7 to further improve the heat dissipation effect of the stirring head:

alternatively, as shown in fig. 2, the cooling structure is a circulating water cooling tube 8 disposed in the central cooling hole 7.

Alternatively, as shown in fig. 3, the cooling structure is a radiating pipe 9 disposed in the central cooling hole 7.

Example 2:

this embodiment is a modification of the above embodiment 1, and in order to realize the present invention more favorably, the following structure is particularly adopted:

as shown in fig. 4 and 5, the air-cooled heat dissipation structure includes a plurality of air guide grooves 5, and all the air guide grooves 5 are uniformly distributed along the circumferential direction of the transition region 2.

As a preferred option, the air guide groove 5 is provided with an air inlet on the outer wall of the transition region 2, an included angle is formed between the orientation of the air inlet and the rotation direction of the stirring head, and the included angle is an acute angle, so that when the stirring head rotates at a high speed, air can rapidly enter the first heat dissipation hole 4 and take away heat of the stirring head, thereby achieving rapid heat exchange between the stirring head and ambient air, and the heat dissipation and cooling effects are obvious.

In summary, the novel stirring head provided in embodiments 1 and 2 sets up a heat dissipation structure in multiple ways on the basis of the conventional stirring head, so as to accelerate the heat dissipation of the functional region 3, reduce the temperature of the functional region 3 during the welding process, improve the yield strength of the stirring pin 302, reduce the corrosion on the shoulder 301 region, reduce the wear of the functional region 3, further improve the service life of the stirring head, and improve the weld forming quality. The novel stirring head is simple and reasonable in structure, the service life of the stirring head can be effectively prolonged, the welding seam forming quality is improved, and the consumption cost of the stirring head is reduced.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a novel stirring head, includes coaxial centre gripping district (1), transition district (2) and functional area (3) of connecting in order, centre gripping district (1) with transition district (2) are cylindrical structure, functional area (3) are toper structure, its characterized in that: functional area (3) include shaft shoulder (301) and stirring needle (302), shaft shoulder (301) are the toper structure, the main aspects of shaft shoulder (301) are connected with transition district (2), the tip of shaft shoulder (301) with stirring needle (302) are connected, be provided with air-cooled heat radiation structure on transition district (2).

2. The new mixing head according to claim 1, characterized in that: the air cooling heat dissipation structure comprises a plurality of first heat dissipation holes (4), and all the first heat dissipation holes (4) are uniformly distributed along the circumferential direction of the transition region (2).

3. The new mixing head according to claim 2, characterized in that: the first heat dissipation hole (4) is formed in the outer wall of the transition area (2) and is provided with an air inlet, an included angle is formed between the orientation of the air inlet and the rotation direction of the stirring head, and the included angle is an acute angle.

4. The new mixing head according to claim 1, characterized in that: the air-cooled heat dissipation structure comprises a plurality of air guide grooves (5), and all the air guide grooves (5) are uniformly distributed along the circumferential direction of the transition region (2).

5. The new mixing head according to claim 4, characterized in that: the air guide groove (5) is provided with an air inlet on the outer wall of the transition area (2), an included angle is formed between the orientation of the air inlet and the rotating direction of the stirring head, and the included angle is an acute angle.

6. A novel stirring head as claimed in any one of claims 1 to 5, characterized in that: and a second heat dissipation hole (6) is formed in the shaft shoulder (301).

7. A novel stirring head as claimed in any one of claims 1 to 5, characterized in that: the end wall of the clamping area (1) is also provided with a central cooling hole (7).

8. The new mixing head according to claim 7, characterized in that: and a circulating water cooling pipe (8) is arranged in the central cooling hole (7).

9. The new mixing head according to claim 7, characterized in that: and a radiating pipe (9) is arranged in the central cooling hole (7).

10. A novel stirring head as claimed in any one of claims 1 to 5, characterized in that: the stirring head is formed by integrally molding the clamping area (1), the transition area (2) and the functional area (3).