CN210387931U

CN210387931U - Stirring head for friction stir welding of water-cooled motor shell

Info

Publication number: CN210387931U
Application number: CN201921208645.9U
Authority: CN
Inventors: 李文晓; 徐晓霞; 刘鑫; 严军富; 胡霞; 张榕峻
Original assignee: Aerospace Engineering Equipment Suzhou Co ltd
Current assignee: Aerospace Engineering Equipment Suzhou Co ltd
Priority date: 2019-07-30
Filing date: 2019-07-30
Publication date: 2020-04-24
Anticipated expiration: 2029-07-30

Abstract

The utility model discloses a stirring head for friction stir welding of a water-cooled motor shell, which comprises a stirring needle and a shaft shoulder, wherein the stirring needle protrudes out of the front end face of the shaft shoulder, and the rear part of the shaft shoulder forms a clamping part used for being connected with a tool handle; the front end face of the shaft shoulder is an inward concave inclined plane, and the stirring needle is provided with a rotary thread and is cut with a conical surface. The utility model discloses a first welding water cooled machine shell of stirring, apron department welding number of times reduces to one by twice, easy operation, and welding efficiency is high, and the welding seam that forms is fine and close, and air tightness can be good, and the welding seam is of high quality.

Description

Stirring head for friction stir welding of water-cooled motor shell

Technical Field

The utility model discloses a stirring head for water cooled machine shell friction stir welding relates to friction stir welding technical device field.

Background

The friction stir welding mainly aims at the connection of nonferrous metals such as aluminum alloy and the like, and has the advantages that the formed welding line is high in quality, small in deformation, free of pollution in the welding process, free of smoke dust and splash, low in noise, energy-saving, environment-friendly and the like; therefore, the application field of the friction stir welding technology is expanding. The stirring head is a direct core component participating in friction stir welding, and the structural design of the stirring head determines the quality of a friction stir welding seam, a welding process and the service life of the welding seam. When the existing water-cooled motor shell is subjected to friction stir welding of the cover plate and the extrusion type shell, as shown in fig. 1, the conventional method needs two welding tracks of an inner circle and an outer circle to finish single-side friction stir welding, and respectively welds an inner welding seam 11 and an outer welding seam 12 of a double-pass welding seam. The utility model discloses a novel stirring head, as shown in fig. 5, replace original two-pass welding method with single pass welding method, realized apron 1 and casing 2's one shot welding, single pass welding seam 13 one shot forming, welding efficiency improves more than the one time.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the defect among the above-mentioned background art, provide a stirring head for water cooled machine shell friction stir welding, simple reliable, work efficiency is high.

In order to achieve the above object, the utility model adopts the following technical scheme: a stirring head for friction stir welding of a water-cooled motor shell is composed of a stirring needle and a shaft shoulder, wherein the stirring needle is located at the center position below the shaft shoulder and protrudes out of the front end face of the shaft shoulder, and the rear part of the shaft shoulder is provided with a fixing part of which the clamping end is used for being connected with an equipment tool handle; the shaft shoulder preceding terminal surface be an indent inclined plane, the stirring needle on have rotatory screw thread to cut there is the circular slot, circular slot and conical surface tapering are the same, stirring needle surface machining has 3~6 circular slots, each circular slot size is the same and at the circumference of cone evenly distributed, the circular slot can promote the flow of welding seam bottom material, weakens the stirring needle simultaneously and crosses the material overflow phenomenon that thick leads to.

Furthermore, the concave angle of the concave inclined plane at the front end of the shaft shoulder is 10-16 degrees, so that more materials brought by the stirring needle can be wrapped, and the quality of a welding seam is ensured.

Furthermore, the front end face of the shaft shoulder of the stirring head is provided with 1-2 circles of concentric circular grooves for generating more heat in the rotating process, ensuring sufficient heat input in the welding process and improving the surface forming condition.

Furthermore, the stirring pin is of a conical structure, the conical structure is large in top and small in bottom, the conical degree of the conical structure is 3-7 degrees, and the diameter of the top end of the stirring pin is larger than the width of the cover plate of the water-cooled motor shell by 1-2mm or is the same as the width of the cover plate of the water-cooled motor shell.

Furthermore, the processing of stirring needle top have indent sphere and most advanced concentric circles, stirring needle top design has indent sphere and most advanced concentric circles, can improve stirring head and prick stage frictional force down fast, increase welding heat input, reduce the too big equipment shake that causes of welding initial pressure value, and then improve welding stability.

Furthermore, the rotating thread on the stirring pin is of a right-handed spiral structure, the spiral structure increases welding heat generation amount in the welding process, promotes material to flow downwards and facilitates the formation of a welding joint.

The working principle is as follows: when the utility model is used for welding, the stirring head is pricked down at the center of any position of the cover plate, the shaft shoulder part is pressed into the water-cooled motor shell by 0.2-0.3mm, the preheating retention time is 3s, a certain rotating speed and welding speed are set, the stirring head is lifted up for a circle along the circumferential direction of the cover plate, and then the welding can be completed; and the utility model discloses the stirring head only forms one broad welding seam, has improved welding efficiency.

Has the advantages that: the utility model discloses a structure is favorable to forming the broad welding seam bottom the welding seam, guarantees the effective connection of apron and casing, forms fine and close welding seam under the stirring needle stirs jointly with the shaft shoulder and extruded effect, has improved the welding seam quality, guarantees efficient welding.

Drawings

FIG. 1 is a schematic illustration of a suitable water cooled motor housing product;

FIG. 2 is a schematic view and a sectional view of the stirring head of the present invention;

FIG. 3 is a bottom view of FIG. 2 within area A;

FIG. 4 is a schematic illustration of a prior art welding method;

fig. 5 is a schematic diagram of the welding method of the present invention.

Detailed Description

The following describes the embodiments in further detail with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

As shown in fig. 2 to 3, the present disclosure provides an embodiment: a stirring head for friction stir welding of a water-cooled motor shell is characterized in that the stirring head 4 consists of a stirring pin 5 and a shaft shoulder 6, the stirring pin 5 is located at the center position below the shaft shoulder 6, the stirring pin 5 protrudes out of the front end face of the shaft shoulder 6, and a clamping part 3 used for being connected with a motor is formed at the rear part of the shaft shoulder 6; the front end face of the shaft shoulder 6 is an inward concave inclined plane, the stirring pin 5 is provided with a rotary thread and is cut with a conical surface 7, the surface of the stirring pin 5 is provided with 3-6 circular grooves, the circular grooves can promote the flow of materials at the bottom of a welding seam, and meanwhile, the phenomenon of overflow of the materials caused by over-thickness of the stirring pin 5 is weakened.

The concave angle of the concave inclined plane at the front end of the shaft shoulder 6 is 10-16 degrees, and the concave inclined plane is used for wrapping more material flow brought by the stirring pin 5, so that the welding seam quality is ensured.

1-2 circles of concentric circular grooves 8 are formed in the front end face of the shaft shoulder 6 of the stirring head 4 and used for generating more heat in the rotating process, ensuring enough heat input in the welding process and improving the surface forming condition.

Stirring needle 5 be the toper structure, the toper structure is big-end-up, its tapering is 3~ 7.

5 top processing of stirring pin have indent sphere 9 and most advanced

concentric ring

10, 5 top designs of stirring pin have indent sphere 9 and most advanced concentric ring 10, indent sphere and most advanced concentric ring set up with one heart, the indent sphere sets up inside most advanced concentric ring, can improve stirring head 4 fast and prick stage frictional force down, increase welding heat input, reduce the too big equipment shake that causes of welding initial pressure value, and then improve welding stability.

The rotary thread is of a right spiral structure, and the stirring pin 5 is fixed on the shaft shoulder 6 through the thread structure.

As shown in fig. 4 to 5, in the conventional welding method, two welding lines are formed; the stirring head of the utility model only forms a wider welding line, the circular cover plate 1 of the seam water-cooled motor shell 2 covers the groove of the shell 2, the minimum diameter of the top end of the stirring pin 5 is larger than the width of the cover plate 1 of the water-cooled motor shell 2 by about 1-2mm, and the cover plate 1 and the shell 2 can form effective connection within the pin length range; the utility model discloses during the welding, stirring head 4 pricks down in the arbitrary department center department of apron 1, and axle shoulder 6 pushes down 0.2-0.3mm in the apron, welds a week along 1 circumferencial direction of apron, can accomplish the welding.

The utility model discloses a structure is favorable to forming the broad welding seam bottom the welding seam, guarantees the effective connection of apron and casing, forms fine and close welding seam under the stirring needle stirs jointly with the shaft shoulder and extruded effect, has improved the welding seam quality, guarantees efficient welding.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.

Claims

1. A stirring head for friction stir welding of a water-cooled motor shell is characterized in that the stirring head consists of a stirring needle and a shaft shoulder, the stirring needle protrudes out of the front end face of the shaft shoulder, and a clamping part used for being connected with a tool shank is formed at the rear part of the shaft shoulder; the front end face of the shaft shoulder is an inward concave inclined plane, the stirring pin is provided with a rotary thread and is cut with a conical surface, 3-6 circular grooves are machined in the surface of the stirring pin, and the circular grooves are the same in size and are evenly distributed in the circumferential direction of the cone.

2. The stirring head for friction stir welding of the water-cooled motor shell according to claim 1, wherein the concave angle of the concave slope of the front end of the shaft shoulder is 10-16 °.

3. The stirring head for friction stir welding of the water-cooled motor shell according to claim 1, wherein 1-2 circles of concentric annular grooves are formed in the front end face of a shaft shoulder of the stirring head.

4. The stirring head for friction stir welding of the water-cooled motor shell according to claim 1, wherein the stirring pin is of a conical structure, and the conical degree of the stirring pin is 3-7 degrees.

5. The stirring head for friction stir welding of the water-cooled motor shell according to claim 1, wherein the top end of the stirring pin is provided with a concave spherical surface and a tip concentric circular ring.

6. The stirring head for friction stir welding of water cooled motor casings as recited in claim 1, wherein said rotating threads are right handed helical structures.

7. The stirring head for friction stir welding of the water-cooled motor shell as recited in claim 1, wherein the diameter of the top end of the stirring head needle is larger than or equal to the width of the cover plate of the water-cooled motor shell.