CN216680682U

CN216680682U - Friction welding stirring head for no-advancing-inclination angle

Info

Publication number: CN216680682U
Application number: CN202123420084.9U
Authority: CN
Inventors: 李继忠; 张标; 刘建国
Original assignee: Fosway Technology Jiashan Co ltd
Current assignee: Fosway Technology Jiashan Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-06-07
Anticipated expiration: 2031-12-31

Abstract

The utility model relates to the technical field of friction stir welding, in particular to a friction stir welding head without a forward inclination angle, which comprises a clamping handle, wherein a connecting column is fixed at the lower end of the clamping handle, a shaft shoulder is fixed at the lower end of the connecting column, a stirring needle is fixed in the middle of the bottom of the shaft shoulder, the stirring needle is a round table with a large upper part and a small lower part, an annular groove is further formed in the bottom surface of the shaft shoulder, the diameter of the annular groove is larger than that of the upper surface of the stirring needle, and a heat dissipation groove is formed in the side wall of the shaft shoulder. Compared with the prior art, the method has the advantages that: in the high-speed rotation process of the stirring head, plasticized metal is gathered in the annular groove at the bottom of the shaft shoulder, so that the temperature of a welding seam is ensured to be high and stable, the welding flux cannot splash, the upsetting force cannot be obviously weakened, a cavity is not easy to generate, and the welding effect is improved; the radiating groove attached to the shaft shoulder has a good radiating function on the rotating stirring head, and the service life of the stirring head can be prolonged.

Description

Friction welding stirring head for no-advancing-inclination angle

Technical Field

The utility model relates to the technical field of friction stir welding, in particular to a friction stir welding head without a forward inclination angle.

Background

The friction stir welding technique is a novel and potential welding method. The method comprises the steps of rotating a stirring head at a high speed and inserting the stirring head into a workpiece, generating friction heat at the contact part of the stirring head and the workpiece, starting to move along a welding direction when metal around the stirring head forms a plastic softening layer, filling a cavity formed behind a stirring pin by the plasticized metal under the rotation action of the stirring head in the welding process, and forging under the stirring action of a shaft shoulder of the stirring head and the stirring pin and the pressure of the top end of the stirring head to form a compact welding line.

Traditional friction stir welding can lead to the regional more base metal attenuate of welding seam at welding process, and no inclination friction stir welding method can reduce the attenuate of welding seam, but in welding process, the high-speed rotation of stirring head can make the solder splash, leads to welding process's upsetting force to weaken, can leave the cavity in welding seam lower floor sometimes, leads to the welding effect not good, and the stirring head heat-sinking capability is not enough, and easy overheat damages.

Therefore, there is a need for an improved structure that overcomes the above-mentioned deficiencies.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provides a friction welding stirring head without a forward inclination angle, compared with the prior art, the friction welding stirring head is realized by the following technical scheme:

the utility model provides a friction welding stirring head for having inclination of advancing, includes the centre gripping handle, centre gripping handle lower extreme is fixed with the spliced pole, the spliced pole lower extreme is fixed with the shaft shoulder, be fixed with the stirring needle in the middle of the bottom of shaft shoulder, the stirring needle is big-end-up's round platform, the shaft shoulder bottom surface still is equipped with the annular groove, the diameter of annular groove is greater than the diameter of stirring needle upper surface, the shaft shoulder lateral wall is equipped with the radiating groove.

Through adopting above-mentioned technical scheme, at the rotatory in-process of stirring head high speed, the plasticized metal gathers in the annular groove of shaft shoulder bottom, guarantees that the welding seam temperature is higher and stable, and the solder can not splash, can not cause the upset force to obviously weaken, is difficult to produce the cavity, promotes welding effect.

In a preferred embodiment of the present invention, the clamping handle, the connecting column, the shoulder and the pin are integrally formed.

Through adopting above-mentioned technical scheme, do not need staff's later stage equipment, save installation time, improve the installation effectiveness, integrated into one piece's manufacturing efficiency is higher simultaneously.

As a preferable scheme of the present invention, the shaft shoulder includes a first connection section and a second connection section, a side surface of the first connection section is an inwardly recessed arc-shaped curve, the second connection section is located at a lower end of the first connection section, and the second connection section is a circular truncated cone with a large top and a small bottom.

Through adopting above-mentioned technical scheme, reduce the shaft shoulder volume, reduce the processing material, streamlined shaft shoulder side is convenient for the circulation of air heat conduction simultaneously for the heat dissipation.

As a preferable aspect of the present invention, the heat dissipation groove is formed in a longitudinal direction.

Through adopting above-mentioned technical scheme, the increase is with the contact of air, increase heat radiating area, the quick heat dissipation of being convenient for.

The utility model discloses a friction welding stirring head without a forward inclination angle, which has the advantages compared with the prior art that: in the high-speed rotation process of the stirring head, plasticized metal is gathered in the annular groove at the bottom of the shaft shoulder, so that the temperature of a welding seam is ensured to be high and stable, the welding flux cannot splash, the upsetting force cannot be obviously weakened, a cavity is not easy to generate, and the welding effect is improved; the radiating groove attached to the shaft shoulder has a good radiating function on the rotating stirring head, and the service life of the stirring head can be prolonged.

Drawings

FIG. 1 is a schematic structural view of a friction welding tool for use with no forward inclination of the present invention;

FIG. 2 is a bottom view of a friction welding tool for use with a non-advancing pitch angle of the present invention.

The corresponding part names indicated by the numbers and letters in the drawings:

1. a clamping handle; 2. connecting blocks; 3. a shaft shoulder; 301. an annular groove; 302. a heat sink; 303. a first connection section; 304. a second connection section; 4. a stirring pin.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not indicated or implied that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limitations of the present patent, and the specific meanings of the terms may be understood by those skilled in the art according to specific situations.

As shown in fig. 1-2, the utility model discloses a friction welding stirring head for a non-advancing inclination angle, which comprises a clamping handle 1, wherein a connecting column 2 is fixed at the lower end of the clamping handle 1, a shaft shoulder 3 is fixed at the lower end of the connecting column 2, a stirring pin 4 is fixed in the middle of the bottom of the shaft shoulder 3, the stirring pin 4 is a circular truncated cone with a large upper part and a small lower part, an annular groove 301 is further formed in the bottom surface of the shaft shoulder 3, the diameter of the annular groove 301 is larger than that of the upper surface of the stirring pin 4, and a heat dissipation groove 302 is formed in the side wall of the shaft shoulder 3. The annular groove 301 is semicircular, so that plastic metal can flow out after gathering, and cannot be accumulated and remained in the groove.

The clamping handle 1, the connecting column 2, the shaft shoulder 3 and the stirring pin 4 are integrally formed. The side wall of the clamping handle 1 is provided with a clamping surface which is convenient for being connected with a tool shank of the stirring head, and the upper end of the clamping handle 1 is provided with a round chamfer.

The length of the stirring pin is 70% -80% of the thickness of the weldment, when the diameter of the stirring head is too large, the area of a forming area is increased, a heat affected zone is widened, and resistance is increased when the stirring head moves forwards, so that the flowing of metal materials is not facilitated; when the size of the stirring head is too small, the heat generated by friction is insufficient, the flowability of the thermoplastic material in a forming area is poor, and the lateral extrusion force generated when the stirring head moves forwards is reduced, so that the stirring head is not beneficial to forming compact tissues, and defects such as grooves and holes can be formed.

Preferably, the outer surface of the stirring pin 4 may be provided with an upward spiral groove, the upper end of the spiral groove is connected with the annular groove 301, and during welding, plastic metal may enter the annular groove 301 under the guidance of the spiral groove, so as to further reduce the spattering loss of the solder.

The ratio of the diameter of the bottom surface of the shaft shoulder 3 to the diameter of the stirring needle is selected as 3: 1, if the shaft shoulder 3 is too large in size, the heat input is increased, the size of a heat affected zone is increased, and a weldment is easy to deform; if the size of the shaft shoulder 3 is too small, the heat input amount needs to be ensured by increasing the rotating speed or reducing the welding speed, and the forming efficiency is low.

The shaft shoulder 3 comprises a first connecting section 303 and a second connecting section 304, the side surface of the first connecting section 303 is an inwardly concave arc-shaped curve, the second connecting section 304 is located at the lower end of the first connecting section 303, and the second connecting section 304 is a circular truncated cone with a large upper end and a small lower end.

The diameter of the upper surface of the first connecting section 303 is larger than that of the clamping handle 1, so that the first connecting section 303 is more stable after being connected with a handle, the diameter of the lower surface of the first connecting section 303 is the same as that of the upper surface of the second connecting section 304, and the first connecting section is connected with the second connecting section 304 to form a smooth curved surface. Compared with the conventional cylindrical shaft shoulder, the shaft shoulder 3 has smaller integral volume and reduces the material usage in casting. The heat dissipation groove 302 is longitudinally opened.

In this embodiment, the number of the heat dissipation grooves 302 is 6, and in an actual production process, a person skilled in the art can adjust the number of the heat dissipation grooves 302 according to an actual processing requirement. The lower end of the heat dissipation groove 302 is not communicated with the bottom surface of the shoulder 3 to prevent the plastic molten metal from flowing into the heat dissipation groove 303.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Claims

1. The utility model provides a friction welding stirring head for having inclination of advancing, a serial communication port, including centre gripping handle (1), centre gripping handle (1) lower extreme is fixed with spliced pole (2), spliced pole (2) lower extreme is fixed with shaft shoulder (3), be fixed with stirring needle (4) in the middle of the bottom of shaft shoulder (3), stirring needle (4) are big-end-up's round platform, shaft shoulder (3) bottom surface still is equipped with annular groove (301), the diameter of annular groove (301) is greater than the diameter of stirring needle (4) upper surface, shaft shoulder (3) lateral wall is equipped with radiating groove (302).

2. A friction welding head for tilt-angle-less forward welding according to claim 1, characterized in that said grip shank (1), said connecting stud (2), said shoulder (3) are formed integrally with said pin (4).

3. The friction welding tool for non-forward rake according to claim 1, characterized in that said shoulder (3) comprises a first connecting section (303) and a second connecting section (304), said first connecting section (303) being curved in an inwardly concave arc shape on its side, said second connecting section (304) being located at the lower end of said first connecting section (303), said second connecting section (304) being a circular truncated cone with a large upper portion and a small lower portion.

4. The friction welding tool for non-progressive canting as claimed in claim 1, wherein said heat sink groove (302) is longitudinally open.