CN217394029U

CN217394029U - Stirring head and friction stir welding machine comprising same

Info

Publication number: CN217394029U
Application number: CN202122997792.2U
Authority: CN
Inventors: 李锋
Original assignee: Jintuo Technology Co ltd
Current assignee: Jintuo Technology Co ltd
Priority date: 2021-12-01
Filing date: 2021-12-01
Publication date: 2022-09-09
Anticipated expiration: 2031-12-01
Also published as: WO2023098314A1

Abstract

The utility model discloses a stirring head and friction stir welding machine who contains it, the stirring head includes arbor, shaft shoulder and stirring needle, the shape of shaft shoulder is the round platform shape, the big end face of shaft shoulder connect in the arbor, the one end of stirring needle connect in the little terminal surface of shaft shoulder, the other end of stirring needle is along keeping away from the outside extension of direction of shaft shoulder, the little terminal surface of shaft shoulder has at least one guiding gutter, the guiding gutter is the arc form, just the guiding gutter certainly the outside of shaft shoulder is played along being close to in the direction of stirring needle is to the extension. The friction stir welding machine comprises a stir head as described above. The small end face of the shaft shoulder is provided with the diversion trench, so that the semi-solid aluminum liquid plasticized by the stirring head when being stirred with the cast aluminum product generates suction force towards the inside of the central circle through the diversion trench, the welding of the stirring head is free from flash, burr and cutter sinking, the yield reaches 100%, and the cost is greatly reduced.

Description

Stirring head and friction stir welding machine comprising same

Technical Field

The utility model relates to a stirring head and contain its friction stir welding machine.

Background

When the friction stir welding machine is used for welding, a point joint which is firmly connected is formed under the action of friction heat and plastic deformation energy. A stirring head is required to be rotatably inserted into the cast aluminum product, and the metal is softened and plastically fluidized by friction between the stirring head and the cast aluminum product.

In the existing friction stir welding machine, when the traditional stirring head is used for welding, the plasticized semisolid aluminum liquid can splash outwards when the stirring head rotates and a cast aluminum product is stirred, so that the phenomena of flash, burr and cutter sinking are easy to occur, the yield is only about 90%, and the cost is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the above-mentioned not enough of current existence, the utility model provides a stirring head and contain its friction stir welding machine.

The utility model discloses a realize through following technical scheme:

the utility model provides a stirring head, its includes mandrel, shaft shoulder and stirring needle, the shape of shaft shoulder is the round platform shape, the big terminal surface of shaft shoulder connect in the mandrel, the one end of stirring needle connect in the little terminal surface of shaft shoulder, the other end of stirring needle is along keeping away from the outside extension of direction of shaft shoulder, the little terminal surface of shaft shoulder has at least one guiding gutter, the guiding gutter is the arc form, just the guiding gutter certainly the outside of shaft shoulder is played to be followed and is close to the direction of stirring needle inwards extends.

Furthermore, the number of the flow guide grooves is multiple, and the multiple flow guide grooves are uniformly distributed on the shaft shoulder at intervals and are positioned around the stirring pin.

Further, the outer surface of the stirring pin is provided with at least one spiral groove, and one end of the spiral groove facing the shaft shoulder corresponds to the diversion groove.

Further, the shaft handle, the shaft shoulder and the stirring pin are integrally formed.

Further, the axes among the shaft handle, the shaft shoulder and the stirring pin are positioned on the same straight line.

Further, the mandrel comprises an installation part, a positioning part and a connecting part, wherein two ends of the positioning part are respectively connected with the installation part and the connecting part, and the positioning part extends outwards in the radial direction of the mandrel to form the outer surface of the installation part.

Further, the connection part between the mounting part and the positioning part is in balanced transition;

and/or the connecting part between the positioning part and the connecting part is in balanced transition.

Furthermore, the shape of the stirring pin is in a round table shape, and the large end face of the stirring pin is connected with the shaft shoulder.

A friction stir welding machine comprising a stir head as described above.

The beneficial effects of the utility model reside in that: the small end face of the shaft shoulder is provided with the diversion trench, so that the semi-solid aluminum liquid plasticized by the stirring head when being stirred with the cast aluminum product generates suction force towards the inside of the central circle through the diversion trench, the welding of the stirring head is free from flash, burr and cutter sinking, the yield reaches 100%, and the cost is greatly reduced.

Drawings

Fig. 1 is a schematic front view of a stirring head according to an embodiment of the present invention.

Fig. 2 is a schematic bottom view of the stirring head according to the embodiment of the present invention.

Description of reference numerals:

shaft handle 1

Mounting part 11

Positioning part 12

Connecting part 13

Shaft shoulder 2

Diversion trench 21

Mixing pin 3

Helical groove 31

Detailed Description

The following description of the various embodiments refers to the accompanying drawings, which are included to illustrate specific embodiments in which the invention may be practiced.

The embodiment discloses a friction stir welding machine which comprises a stirring head. As shown in fig. 1 and 2, this stirring head includes shaft handle 1, shaft shoulder 2 and stirring pin 3, the shape of shaft shoulder 2 is the round platform shape, the big terminal surface of shaft shoulder 2 is connected in shaft handle 1, the one end of stirring pin 3 is connected in the little terminal surface of shaft shoulder 2, the other end of stirring pin 3 is outwards extended along the direction of keeping away from shaft shoulder 2, the little terminal surface of shaft shoulder 2 has at least one guiding gutter 21, guiding gutter 21 is the arc form, and guiding gutter 21 is from the outside of shaft shoulder 2 to start along the direction inwards extending that is close to in stirring pin 3.

The stirring head is used for being connected with external equipment through the shaft handle 1, and the shaft shoulder 2 and the stirring pin 3 are also subjected to rotary friction welding together through the rotation of the shaft handle 1. When the friction stir welding machine is used for friction stir welding of cast aluminum products, the small end face of the shaft shoulder 2 is provided with the guide groove 21, so that plasticized semi-solid aluminum liquid is enabled to generate suction force towards the inside of the central circle through the guide groove 21 when the stirring head is stirred with the cast aluminum products, the plasticized semi-solid aluminum liquid is effectively reduced from splashing to the outside, welding of the stirring head is enabled to be free of flash burrs and cutter sinking, the yield reaches 100%, and the cost is greatly reduced.

The number of the flow guide grooves 21 is multiple, and the flow guide grooves 21 are uniformly distributed on the shaft shoulder 2 at intervals and are positioned around the stirring pin 3. The plurality of diversion grooves 21 play a role in diversion of the plasticized semisolid aluminum liquid at the same time, and the plasticized semisolid aluminum liquid is further reduced from splashing to the outside, so that the welding of the stirring head is free of flash, burr and cutter sinking, the yield reaches 100%, and the cost is greatly reduced. In the present embodiment, the number of the channels 21 is three.

The stirring pin 3 has at least one spiral groove 31 on the outer surface, and one end of the spiral groove 31 facing the shaft shoulder 2 corresponds to the diversion trench 21. When the stirring pin 3 is in rotary friction welding, the spiral groove 31 can further play a role in guiding the plasticized semi-solid aluminum liquid, so that the semi-solid aluminum liquid is prevented from being accumulated, the welding of the stirring head is free from flash, burr and cutter sinking, the yield reaches 100%, and the cost is greatly reduced. Wherein, the shape of the stirring pin 3 is in a round table shape, and the big end surface of the stirring pin 3 is connected with the shaft shoulder 2.

In the embodiment, the shaft handle 1, the shaft shoulder 2 and the stirring pin 3 are integrally formed. The stirring head has high strength of the whole structure and is convenient to process and manufacture.

Wherein, the axes among the shaft handle 1, the shaft shoulder 2 and the stirring pin 3 are positioned on the same straight line. The stability is higher when the shaft handle 1, the shaft shoulder 2 and the stirring pin 3 rotate together, the processing precision of the friction stir welding machine is greatly improved, and the cost is reduced.

The mandrel 1 comprises a mounting part 11, a positioning part 12 and a connecting part 13, two ends of the positioning part 12 are respectively connected to the mounting part 11 and the connecting part 13, and the positioning part 12 extends outwards along the radial direction of the mandrel 1 to form the outer surface of the mounting part 11. The installation part 11 is used for being connected with external equipment, and the positioning part 12 is used for realizing accurate positioning installation, so that the installation is very convenient; meanwhile, the structure is simple, and the processing and the manufacturing are convenient. Wherein the connection between the mounting part 11 and the positioning part 12 is in balanced transition. The connection between the positioning portion 12 and the connecting portion 13 is in a balanced transition.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention, therefore, all equivalent variations of the present invention are intended to be covered by the present invention.

Claims

1. The utility model provides a stirring head, its characterized in that, it includes arbor, shaft shoulder and stirring needle, the shape of shaft shoulder is the round platform shape, the big terminal surface of shaft shoulder connect in the arbor, the one end of stirring needle connect in the little terminal surface of shaft shoulder, the other end of stirring needle is along keeping away from the direction of shaft shoulder outwards extends, the little terminal surface of shaft shoulder has at least one guiding gutter, the guiding gutter is the arc form, just the guiding gutter certainly the outside of shaft shoulder is played to be followed and is close to in the direction of stirring needle inwards extends, at least one helicla flute has on the surface of stirring needle, in the helicla flute towards the one end of shaft shoulder with the guiding gutter is corresponding.

2. The mixing head of claim 1 wherein the number of the flow-guiding grooves is plural, and the flow-guiding grooves are uniformly distributed on the shaft shoulder at intervals and are located around the mixing needle.

3. The pin tool of claim 1, wherein said shank, said shoulder and said pin are integrally formed.

4. The pin of claim 1 wherein the axes of the shank, the shoulder and the pin are collinear.

5. The mixing head of claim 1 wherein the mandrel includes a mounting portion, a positioning portion and a connecting portion, wherein two ends of the positioning portion are connected to the mounting portion and the connecting portion, respectively, and the positioning portion extends outwardly from an outer surface of the mounting portion in a radial direction of the mandrel.

6. The pin tumbler of claim 5, wherein the junction between the mounting portion and the locating portion is in balanced transition;

7. The pin tool of claim 1, wherein the pin tool is in the shape of a circular truncated cone, and a large end surface of the pin tool is attached to the shoulder.

8. A friction stir welding machine comprising a stir head according to any of claims 1 to 7.