CN205324973U - A detachable stirring head for processing of sphere friction stir - Google Patents

Abstract

The utility model discloses a detachable stirring head for processing of sphere friction stir, including centre gripping position (1), centre gripping position (1) is provided with stirring probe (3), through the shaft shoulder (7) interconnect between centre gripping position (1) and the stirring probe (3).

Description

Removable Stir Head for Spherical Friction Stir Machining

technical field

The utility model relates to the technical field of design of a stirring head of friction stirring processing equipment, in particular to a detachable stirring head used for friction stirring processing of spherical surfaces.

Background technique

Friction stir welding (FSW) is a new solid-phase welding technology, which has the advantages of good weld quality consistency, high weld strength, low weld temperature, significantly reduced residual stress and residual deformation in the weld zone, etc. advantage. It has been applied to varying degrees in industries such as high-speed trains, aerospace, ships, and automobiles. Friction stir processing (Frictionstirprocessing, FSP) is a processing method evolved from friction stir welding. Its principle is to make the processed material undergo severe plastic deformation, mixing and crushing through the strong stirring effect of the stirring head, so as to realize the compactness of the microstructure. Homogenization, homogenization and refinement.

Stirring head is the key to friction stir processing technology. At present, the stirring head used at home and abroad usually includes three parts: clamping part, shaft shoulder and stirring probe. The material, shape and size of the stirring head have a great influence on the forming and performance of the friction stir processing joint, for example: the diameter of the stirring head shoulder is three to four times the length of the stirring needle; the length of the stirring needle should be slightly smaller than the material to be processed thickness of. During friction stir processing, the shaft shoulder is in close contact with the surface of the processed material to prevent overflow and oxidation of the plasticized metal material, and at the same time, the shaft shoulder can also provide the friction stir heat required for part of the processing. The currently used stirring head has a concave surface with a small angle on the shaft shoulder. When performing friction stir processing on flat plates, this concave surface can effectively prevent the material from overflowing and oxidizing when the stirring head is moving (as shown in Figure 1) . However, when processing a spherical surface with a certain curvature, this small-angle concave surface is not enough to prevent the material from overflowing (as shown in Figure 2), so this type of stirring head cannot complete the friction stir processing of spherical materials.

Utility model content

The technical problem to be solved by the utility model is to provide a detachable stirring head for spherical surface friction stirring processing with simple structure.

In order to solve the above technical problems, the utility model provides a detachable stirring head for spherical friction stir processing, including a clamping part; the clamping part is provided with a stirring probe; the clamping part and the stirring probe are connected to each other by shoulders.

As an improvement to the detachable stirring head for spherical friction stir processing described in the present invention: the shaft shoulder includes a shaft shoulder sleeve installation part, and the two ends of the shaft shoulder sleeve installation part are respectively connected to the clamping part It is connected with the stirring probe; the shaft shoulder sleeve is sleeved on the installation part of the shaft shoulder sleeve.

As a further improvement to the detachable stirring head for spherical friction stir processing described in the present invention: the lower end surface of the shoulder sleeve is a curved surface; the same length.

As a further improvement to the detachable stirring head for spherical friction stir processing described in the present invention: the shaft shoulder sleeve installation part and the shaft shoulder sleeve are fixed by pins.

As a further improvement to the detachable stirring head for spherical friction stir processing described in the present invention: the curvature of the lower end surface of the shoulder sleeve is greater than the spherical curvature of the workpiece; the axis of the stirring probe always passes through the The center of the spherical surface of the workpiece.

As a further improvement to the detachable stirring head for spherical friction stir processing described in the present invention: the diameter of the bottom of the shoulder sleeve is at least 3 times the diameter of the stirring probe.

As a further improvement to the detachable stirring head for spherical friction stir processing described in the present invention: the curvature of the shoulder sleeve is 120% of the spherical curvature of the workpiece to be processed.

The technical problem to be solved by the utility model is to overcome the deficiency of the above-mentioned background technology, so as to solve the problem that the material is easy to overflow when the spherical surface is subjected to friction stir processing. The utility model designs a detachable stirring head at the shaft shoulder, and adopts a larger curvature when designing the concave surface of the shaft shoulder. This curvature should be slightly larger than the curvature of the spherical surface to be processed to solve the problem that the spherical surface is difficult to process. Problem, this type of stirring head is suitable for the processing of spherical surfaces whose diameter is larger than that of the shaft shoulder. During friction stir processing, the axis of the stirring head should always pass through the center of the spherical surface to be processed. When processing spherical surfaces with different curvatures, only the shaft shoulder needs to be replaced, which can greatly save materials and processing time.

Description of drawings

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described in further detail.

Fig. 1 is the main structural representation of the utility model;

Fig. 2 is a schematic structural diagram of Fig. 1 in use;

FIG. 3 is an enlarged structural schematic diagram of the stirring probe 3 in FIG. 2 .

detailed description

Embodiment 1, Figures 1 to 3 show a detachable stirring head for friction stir processing of spherical surfaces. The detachable stirring head for spherical friction stir processing includes a clamping part 1 , a stirring probe 3 , and a shaft shoulder 7 . The clamping part 1 and the stirring probe 3 are connected to each other through the shaft shoulder 7 . The shaft shoulder 7 includes a shaft shoulder sleeve installation part 2, and the two ends of the shaft shoulder sleeve installation part 2 are respectively connected with the clamping part 1 and the stirring probe 3 (the clamping part 1, the shaft shoulder sleeve installation part 2 It is integrally formed with the stirring probe 3, and the material for processing the stirring probe 3 is high-speed steel. The stirring probe 3 is a tapered and threaded stirring needle with a length of 4.8mm and a diameter of 5mm); installed on the shoulder sleeve The shoulder sleeve 4 is set on the part 2. The shaft shoulder sleeve installation part 2 and the shaft shoulder sleeve 4 are fixed by a pin 6 (5mm in diameter), the length of the pin 6 is longer than the diameter of the shaft shoulder sleeve 4, and the fixing method is in the shaft shoulder sleeve Drill a hole on the cylinder installation part 2 (that is, process a 5mm hole transversely through the shaft shoulder sleeve installation part 2), and set corresponding holes on the shaft shoulder sleeve 4 relative to the holes on the shaft shoulder sleeve installation part 2 , and through all the holes through the pin 6 which is larger than the diameter of the shoulder sleeve 4, the fixation is completed, and because the pin 6 is inserted, the two ends are exposed, and the pin 6 can be easily pushed out when it needs to be contacted and fixed. . The diameter of the bottom of the shoulder sleeve 4 is at least three times the diameter of the stirring probe 3 . The lower end surface of the shoulder sleeve 4 is a curved surface; the length of the shoulder sleeve 4 is consistent with the length of the shoulder sleeve installation part 2 . After the shoulder sleeve 4 is installed on the shoulder sleeve installation part 2 , the stirring probe 3 is located in the curved surface of the lower end of the shoulder sleeve 4 . During processing, the shoulder sleeve 4 is selected by the spherical curvature of the workpiece so that the curvature of the lower end surface of the shoulder sleeve 4 is greater than the spherical curvature of the workpiece (generally the curvature of the shoulder sleeve 4 is required 120% of the curvature of the processed spherical surface), and the axis of the stirring probe 3 always passes through the center of the spherical surface of the workpiece, which can prevent overflow and oxidation of materials during friction stir processing.

When using, the steps are as follows:

A proper shoulder sleeve 4 is selected according to the spherical curvature of the workpiece 100 . It ensures that the curvature of the lower end surface of the shoulder sleeve 4 is greater than the spherical curvature of the workpiece 100 (generally the curvature of the shoulder sleeve 4 is 120% of the spherical curvature to be processed).

Afterwards, it is assembled and then formally processed.

Finally, it should also be noted that what is listed above is only a specific embodiment of the present invention. Apparently, the utility model is not limited to the above embodiments, and many variations are possible. All deformations that a person skilled in the art can derive or associate directly from the content disclosed in the utility model shall be considered as the protection scope of the utility model.

Claims (7)

1. A detachable stirring head for spherical surface friction stir processing, comprising a clamping part (1); the clamping part (1) is provided with a stirring probe (3); it is characterized in that: the clamping part ( 1) and the stirring probe (3) are connected to each other through the shoulder (7). 2. The detachable stirring head for spherical friction stir processing according to claim 1, characterized in that: the shoulder (7) includes a shoulder sleeve installation part (2), and the shoulder sleeve Both ends of the mounting part (2) are respectively connected to the clamping part (1) and the stirring probe (3); A shoulder sleeve (4) is sleeved on the shoulder sleeve installation part (2). 3. The detachable stirring head for spherical friction stir processing according to claim 2, characterized in that: the lower end surface of the shoulder sleeve (4) is a curved surface; The length of the shaft shoulder sleeve (4) is consistent with the length of the shaft shoulder sleeve installation portion (2). 4. The detachable stirring head for spherical surface friction stir processing according to claim 3, characterized in that: a pin ( 6) Fixed. 5. The detachable stirring head for spherical friction stir processing according to claim 4, characterized in that: the curvature of the lower end surface of the shoulder sleeve (4) is greater than the spherical curvature of the workpiece to be processed; The axis of the stirring probe (3) always passes through the center of the spherical surface of the workpiece. 6. The detachable stirring head for spherical friction stir processing according to claim 5, characterized in that: the diameter of the bottom of the shoulder sleeve (4) is at least 3 times the diameter of the stirring probe (3) . 7. The detachable stirring head for spherical friction stir processing according to claim 6, characterized in that: the curvature of the shoulder sleeve (4) is 120% of the spherical curvature of the workpiece to be processed.