Stirring head for aluminum alloy friction stir welding

Abstract

The utility model discloses a stirring head for aluminum alloy friction stir welding, and relates to the technical field of friction stir welding. The spindle comprises a clamping part, a spindle shoulder is fixedly installed at the bottom of the clamping part, an annular plate is fixedly installed on the side wall face of the spindle shoulder, two sets of equal-proportion scaling shaft shoulder assemblies are arranged below the annular plate and are coaxially distributed, and the spindle shoulder is sleeved with the small-diameter shaft shoulder assembly. According to the utility model, if the shaft shoulder assembly with a small diameter is sleeved outside the main shaft shoulder, and then the three bolts II are rotated, so that the bottom ends of the three bolts II are respectively in threaded connection with the interiors of the three threaded holes I, the friction welding range of the main shaft shoulder can be expanded, and if the shaft shoulder assembly with a large diameter is sleeved outside the shaft shoulder assembly with a small diameter, the friction welding range of the main shaft shoulder can be expanded. And then three second bolts are rotated, so that the bottom ends of the three second bolts are in threaded connection with the interiors of the three first threaded holes correspondingly, and the friction welding range of the main shaft shoulder can be further expanded.

Description

Technical Field

[0001] The utility model relates to the technical field of stir friction welding, in particular to a stirring head for stir friction welding of aluminum alloys. Background Art

[0002] Aluminum alloy welding technology faces some urgent problems: refractory oxide film on the surface, softening of joints, easy generation of pores, easy thermal deformation and excessive thermal conductivity. Friction stir welding is a solid phase welding with the advantages of fine grains, good fatigue performance, tensile performance and bending performance, no dust, no pores, no spatter, energy saving, no need for welding wire, no need to use protective gas during welding, small residual stress and deformation after welding, etc. It completely solves all the problems of aluminum alloy welding and can also meet the welding needs of a full range of aluminum alloys.

[0003] Friction stir welding uses a special type of stirring head to insert into the part of the workpiece to be welded. Through the stirring friction between the stirring head and the workpiece, the friction heat makes the metal in that part in a thermoplastic state and flows plastically from its front end to the rear under the pressure of the stirring head, so that the parts to be welded are pressed and welded into a whole. Here, the stirring head plays the role of fragmentation, friction, and stirring of the surrounding metal.

[0004] However, in actual application, the diameter of the shoulder of the existing stirring head for aluminum alloy stir friction welding is generally fixed and cannot be adjusted. In order to meet different welding requirements, manufacturers usually need to customize stirring heads with different shoulder diameters. Therefore, the application range of the existing stirring head for aluminum alloy stir friction welding is relatively narrow. Therefore, a stirring head for aluminum alloy stir friction welding is proposed. Utility Model Content

[0005] The utility model aims to solve the problem that the diameter of the shaft shoulder of the existing stirring head for aluminum alloy friction stir welding is generally fixed and cannot be adjusted. The utility model provides a stirring head for aluminum alloy friction stir welding.

[0006] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:

[0007] A stirring head for aluminum alloy stir friction welding comprises a clamping part, a main shaft shoulder is fixedly installed on the bottom of the clamping part, an annular plate is fixedly installed on the side wall of the main shaft shoulder, two groups of proportionally scaled shoulder components are arranged below the annular plate, the two groups of shoulder components are coaxially distributed, the shoulder component with a small diameter is sleeved on the outside of the main shaft shoulder, and the shoulder component with a large diameter is sleeved on the outside of the shoulder component with a small diameter, the shoulder component comprises shoulder 1 and shoulder 2, shoulder 1 is an inverted truncated cone structure with a cylindrical through hole inside, shoulder 2 is a cylindrical structure with a truncated cone through hole inside, three evenly distributed threaded holes 1 are opened on the top of each shoulder 1, threaded holes 4 are opened on the top of the annular plate at the position corresponding to each threaded hole 1, the internal thread of each threaded hole 4 is connected with bolt 2, and the bottom end of each bolt 2 is threadedly connected to the inside of the corresponding threaded hole 1.

[0008] Furthermore, the outer wall surface of each shoulder 1 is provided with three evenly distributed threaded holes 2, the bottom of each shoulder 2 is provided with three evenly distributed threaded holes 3, the interior of each threaded hole 3 is threadedly connected with a bolt 1, and the bottom end of each bolt 1 is threadedly connected to the interior of the corresponding threaded hole 2.

[0009] Furthermore, three evenly distributed limit grooves are provided on the inner wall of the shaft shoulder with a small diameter, and a limit block is movably installed inside each limit groove, and each limit block is fixedly connected to the main shaft shoulder.

[0010] Furthermore, three evenly distributed limit grooves 2 are provided on the side wall surface of the shaft shoulder 1 with a large diameter, and a limit block 2 is movably installed inside each limit groove 2, and each limit block 2 is fixedly connected to the shaft shoulder 2 with a small diameter.

[0011] Furthermore, a groove is provided at the bottom of the main shaft shoulder, and a stirring head whose position can be adjusted up and down is arranged inside the groove.

[0012] Furthermore, two fixing grooves are provided on the side wall of the mixing head, and two groups of fixing holes are provided on the inner wall of the groove. Each group of fixing holes is composed of three fixing holes distributed equidistantly in the longitudinal direction, and each fixing groove is threadedly connected to the inside of the corresponding fixing hole by bolt three.

[0013] The beneficial effects of the utility model are as follows:

[0014] 1. During the welding process of the utility model, if the two groups of shoulder assemblies are removed from the bottom of the annular plate respectively, it is only necessary to rotate each bolt 2 respectively so that the bottom end of each bolt 2 is rotated out from the inside of the corresponding threaded hole 1, so that the two groups of shoulder assemblies can be completely removed. At this time, the main shoulder can be used for welding. If the shoulder assembly with a small diameter is sleeved on the outside of the main shoulder, and three of the bolts 2 are rotated so that the bottom ends of the three bolts 2 are respectively threadedly connected to the inside of the three threaded holes 1, the friction welding range of the main shoulder can be expanded. If the shoulder assembly with a large diameter is sleeved on the outside of the shoulder assembly with a small diameter, and three of the bolts 2 are rotated so that the bottom ends of the three bolts 2 are respectively threadedly connected to the inside of the three threaded holes 1, the friction welding range of the main shoulder can be further expanded. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 This utility model Figure 1 The enlarged view of point A in the middle;

[0017] Figure 3 It is an exploded schematic diagram of the shoulder assembly of the utility model;

[0018] Figure numerals: 1. clamping part; 2. main shaft shoulder; 3. annular plate; 4. shoulder assembly; 41. shoulder one; 42. shoulder two; 43. threaded hole one; 44. threaded hole two; 45. threaded hole three; 46. bolt one; 5. threaded hole four; 6. bolt two; 7. limit groove one; 8. limit block; 9. limit groove two; 10. limit block two; 11. groove; 12. stirring head; 13. fixing groove; 14. fixing hole; 15. bolt three. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0022] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] like Figures 1 to 3 As shown, a stirring head for aluminum alloy stir friction welding comprises a clamping part 1, a main shaft shoulder 2 is fixedly installed at the bottom of the clamping part 1, an annular plate 3 is fixedly installed on the side wall of the main shaft shoulder 2, two groups of proportionally scaled shoulder assemblies 4 are arranged below the annular plate 3, the two groups of shoulder assemblies 4 are coaxially distributed, the shoulder assembly 4 with a small diameter is sleeved on the outside of the main shaft shoulder 2, and the shoulder assembly 4 with a large diameter is sleeved on the outside of the shoulder assembly 4 with a small diameter, the shoulder assembly 4 comprises a shoulder 1 41 and a shoulder 2 42, the shoulder 1 41 is an inverted truncated cone structure with a cylindrical through hole inside, the shoulder 1 41 is a cylindrical structure with a truncated cone through hole inside, each shoulder 1 41 is provided with three evenly distributed threaded holes 1 43 at the top, a threaded hole 4 5 is provided at the top of the annular plate 3 corresponding to the position of each threaded hole 1 43, the internal thread of each threaded hole 45 is connected with a bolt 2 6, and each bolt The bottom ends of bolts 26 are threadedly connected to the inside of the corresponding threaded holes 43. It should be noted that during the welding process, if the two groups of shoulder assemblies 4 are removed from the bottom of the annular plate 3 respectively, it is only necessary to rotate each bolt 26 respectively so that the bottom end of each bolt 26 is rotated out from the inside of the corresponding threaded hole 43, so that the two groups of shoulder assemblies 4 can be completely removed. At this time, the main shoulder 2 can be used for welding. If the shoulder assembly 4 with a small diameter is mounted on the outside of the main shoulder 2, and three of the bolts 26 are rotated so that the bottom ends of the three bolts 26 are respectively threadedly connected to the inside of the three threaded holes 43, the friction welding range of the main shoulder 2 can be expanded. If the shoulder assembly 4 with a large diameter is mounted on the outside of the shoulder assembly 4 with a small diameter, and three of the bolts 26 are rotated so that the bottom ends of the three bolts 26 are respectively threadedly connected to the inside of the three threaded holes 43, the friction welding range of the main shoulder 2 can be further expanded.

[0024] like Figure 1 , Figure 3As shown, the outer wall surface of each shoulder 41 is provided with three evenly distributed threaded holes 44, and the bottom of each shoulder 42 is provided with three evenly distributed threaded holes 45. The interior of each threaded hole 45 is threadedly connected with a bolt 46, and the bottom end of each bolt 46 is threadedly connected to the interior of the corresponding threaded hole 44. It should be noted that when any set of shoulder assemblies 4 is used, the corresponding three bolts 46 are rotated out from the connected threaded holes 45 and 44, and the corresponding shoulder 41 can be used for rotational friction welding to meet different processing needs.

[0025] like Figures 1 to 3 As shown, the inner wall surface of the small diameter shoulder 41 is provided with three evenly distributed limit grooves 7, and a limit block 8 is movably installed inside each limit groove 7, and each limit block 8 is fixedly connected to the main shoulder 2. It should be noted that if it is necessary to connect the small diameter shoulder 41 and the shoulder 2 42, the three limit blocks 8 can be respectively snapped into the inside of the three limit grooves 7, which facilitates the alignment of the small diameter shoulder 41 and the shoulder 2 42.

[0026] like Figure 3 As shown, the side wall surface of the large diameter shoulder 41 is provided with three evenly distributed limit grooves 29, and a limit block 2 10 is movably installed inside each limit groove 29, and each limit block 2 10 is fixedly connected to the small diameter shoulder 42. It should be noted that if it is necessary to connect the large diameter shoulder 1 41 and the shoulder 2 42, the three limit blocks 2 10 can be respectively snapped into the inside of the three limit grooves 29, which facilitates the alignment of the large diameter shoulder 1 41 and the shoulder 2 42.

[0027] like Figure 1 , Figure 3 As shown, a groove 11 is provided at the bottom of the spindle shoulder 2, and a stirring head 12 whose position can be adjusted up and down is arranged inside the groove 11. It should be noted that during processing, the stirring head 12 can be installed to a suitable position as needed to facilitate different welding depth requirements.

[0028] like Figures 1 to 3 As shown, the side wall surface of the stirring head 12 is provided with two fixing grooves 13, and the inner wall surface of the groove 11 is provided with two groups of fixing holes 14, each group of fixing holes 14 is composed of three fixing holes 14 distributed equidistantly in the longitudinal direction, and each fixing groove 13 is threadedly connected to the corresponding fixing hole 14 with a bolt three 15. It should be noted that the stirring head 12 is first moved up and down to a suitable position, and then each bolt three 15 is threadedly connected to the inside of the corresponding two fixing grooves 13 to fix the stirring head 12.

[0029] In summary:

[0030] During the welding process, if the two groups of shoulder assemblies 4 are removed from the bottom of the annular plate 3 respectively, it is only necessary to rotate each bolt 26 respectively so that the bottom end of each bolt 26 is rotated out from the inside of the corresponding threaded hole 43, so that the two groups of shoulder assemblies 4 can be completely removed. At this time, the main shoulder 2 can be used for welding. If the shoulder assembly 4 with a small diameter is sleeved on the outside of the main shoulder 2, and three of the bolts 26 are rotated so that the bottom ends of the three bolts 26 are respectively threadedly connected to the inside of the three threaded holes 43, the friction welding range of the main shoulder 2 can be expanded. If the shoulder assembly 4 with a large diameter is sleeved on the outside of the shoulder assembly 4 with a small diameter, and three of the bolts 26 are rotated so that the bottom ends of the three bolts 26 are respectively threadedly connected to the inside of the three threaded holes 43, the friction welding range of the main shoulder 2 can be further expanded.

[0031] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A stirring head for aluminum alloy friction stir welding, comprising a clamping part (1), a main shaft shoulder (2) being fixedly mounted on the bottom of the clamping part (1), It is characterized in that An annular plate (3) is fixedly mounted on the side wall of the main shaft shoulder (2), and two groups of proportionally scaled shoulder assemblies (4) are arranged below the annular plate (3). The two groups of shoulder assemblies (4) are coaxially distributed, and the shoulder assembly (4) with a smaller diameter is sleeved on the outside of the main shaft shoulder (2), and the shoulder assembly (4) with a larger diameter is sleeved on the outside of the shoulder assembly (4) with a smaller diameter. The shoulder assembly (4) includes a shoulder 1 (41) and a shoulder 2 (42). The shoulder 1 (41) is provided with a cylindrical inner portion. The shaft shoulder (41) is a cylindrical structure with a truncated cone-shaped through hole, the shaft shoulder (41) is a cylindrical structure with a truncated cone-shaped through hole inside, the top of each shaft shoulder (41) is provided with three evenly distributed threaded holes (43), the top of the annular plate (3) is provided with a threaded hole (5) corresponding to the position of each threaded hole (43), the internal thread of each threaded hole (5) is connected with a bolt (6), and the bottom end of each bolt (6) is threadedly connected to the inside of the corresponding threaded hole (43).

2. A stirring head for aluminum alloy friction stir welding according to claim 1, It is characterized in that The outer wall surface of each shaft shoulder 1 (41) is provided with three evenly distributed threaded holes 2 (44), and the bottom of each shaft shoulder 2 (42) is provided with three evenly distributed threaded holes 3 (45). The interior of each threaded hole 3 (45) is threadedly connected with a bolt 1 (46), and the bottom end of each bolt 1 (46) is threadedly connected to the interior of the corresponding threaded hole 2 (44).

3. A stirring head for aluminum alloy friction stir welding according to claim 1, It is characterized in that The inner wall surface of the small-diameter shaft shoulder (41) is provided with three evenly distributed limit grooves (7), each limit groove (7) is movably installed with a limit block (8), and each limit block (8) is fixedly connected to the main shaft shoulder (2).

4. A stirring head for aluminum alloy friction stir welding according to claim 1, It is characterized in that The side wall surface of the large diameter shaft shoulder 1 (41) is provided with three evenly distributed limit grooves 2 (9), each limit groove 2 (9) is movably installed with a limit block 2 (10), and each limit block 2 (10) is fixedly connected to the small diameter shaft shoulder 2 (42).

5. The stirring head for aluminum alloy friction stir welding according to claim 1, It is characterized in that A groove (11) is provided at the bottom of the main shaft shoulder (2), and a stirring head (12) whose position can be adjusted up and down is arranged inside the groove (11).

6. A stirring head for aluminum alloy friction stir welding according to claim 5, It is characterized in that The side wall surface of the stirring head (12) is provided with two fixing grooves (13), and the inner wall surface of the groove (11) is provided with two groups of fixing holes (14). Each group of fixing holes (14) is composed of three fixing holes (14) distributed equidistantly in the longitudinal direction. Each fixing groove (13) is threadedly connected to the inside of the corresponding fixing hole (14) by a bolt three (15).

Images