Combined type static shaft shoulder friction stir welding tool

Abstract

The utility model provides a combined stationary shoulder friction stir welding tool, which comprises a stationary shoulder assembly and a rotating assembly, the stationary shoulder assembly comprises a stationary shoulder and a shell which are detachably connected, the inner wall of the stationary shoulder is fixedly provided with a first bearing, and the inner wall of the shell is fixedly provided with a second bearing; the first end of the rotating assembly is inserted into the inner rings of the first bearing and the second bearing; the second end of the rotating assembly is connected with the spindle; the shell is stably connected with the clamp; in the working state, the main shaft drives the rotating assembly to rotate relative to the static shaft shoulder assembly. According to the embodiment, the static shaft shoulder is detachably connected with the shell, so that the static shaft shoulder is more convenient to disassemble and assemble. And the rotating assembly is rotatably connected with the shell and the static shaft shoulder, so that in a working state, the shell and the static shaft shoulder are in a static state, and the rotating assembly rotates relative to the shell. Therefore, better stability can be provided.

Description

Technical Field

[0001] The utility model relates to the technical field of welding, in particular to a combined stationary shoulder friction stir welding tool. Background Art

[0002] With the continuous development of friction stir welding technology, it has been widely used in the connection of aluminum and magnesium light alloys. In the friction stir welding technology, the stirring head is the core part, which is the main source of heat required for weld formation and also the carrier for the directional transfer of materials in the weld zone.

[0003] The related stationary shoulders are often fixed on the main shaft by screws. Each time the stationary shoulder is replaced, it is necessary to manually tighten and loosen the screws, making the replacement process relatively complicated, thus affecting the replacement efficiency. Summary of the Utility Model

[0004] The content part of the present utility model is used to briefly introduce the concepts, which will be described in detail in the following specific implementation part. The content part of the present disclosure is not intended to identify the key features or essential features of the claimed technical solution, nor is it intended to limit the scope of the claimed technical solution.

[0005] The present utility model provides a combined stationary shoulder friction stir welding tool to solve the technical problems mentioned in the above background art part.

[0006] The combined stationary shoulder friction stir welding tool includes a stationary shoulder assembly and a rotating assembly. Among them,

[0007] The stationary shoulder assembly includes a detachable stationary shoulder and a housing. A first bearing is fixedly arranged on the inner wall of the stationary shoulder, and a second bearing is fixedly arranged on the inner wall of the housing;

[0008] The first end of the rotating assembly is inserted into the inner rings of the first bearing and the second bearing;

[0009] The second end of the rotating assembly is connected to the main shaft;

[0010] The housing is firmly connected to the fixture;

[0011] In the working state, the main shaft drives the rotating assembly to rotate relative to the stationary shoulder assembly.

[0012] Optionally, two oppositely arranged positioning columns are fixedly arranged on the upper end surface of the stationary shoulder, and two positioning holes are opened on the lower end surface of the housing; in the assembled state, the two positioning columns are inserted into the two positioning holes one by one.

[0013] Optionally, two first L-shaped grooves that are centrosymmetric with respect to the center of the circle are provided on the upper end surface of the static shoulder; a limit pin with hooks at both ends is movably arranged in each of the first L-shaped grooves; two second L-shaped grooves corresponding to the two first L-shaped grooves are provided on the lower end surface of the housing; as the limit pin moves towards or away from the center of the circle of the static shoulder, the two hooks of the limit pin are separated from and engaged with the transverse sections of the first L-shaped groove and the second L-shaped groove respectively.

[0014] Optionally, the vertical sections of the first L-shaped groove and the second L-shaped groove are larger than the width of the limit pin.

[0015] Optionally, a spring piece is arranged in each of the first L-shaped grooves, one end of the spring piece is engaged with the inner wall of the first L-shaped groove, and the other end of the spring piece abuts against the first side of the limit pin.

[0016] Optionally, a control rod is connected to the second side of each of the limit pins, and the control rod slidably passes through the static shoulder.

[0017] Optionally, through holes are provided on both sides of the static shoulder, and the two control rods are slidably inserted into the two through holes in one-to-one correspondence.

[0018] Optionally, the maximum distance that the control rod protrudes from the static shoulder is greater than the width of the hook of the limit pin.

[0019] Optionally, the rotating assembly includes a tool shank, a connecting shaft, and a stirring head that are connected in sequence, the tool shank is inserted into the first bearing and the second bearing, and the stirring head protrudes from the static shoulder.

[0020] Optionally, the tool shank is further connected with a pull stud, and the pull stud is connected with the main shaft.

[0021] The above embodiments of the present utility model have the following beneficial effects: Through the combined static shoulder friction stir welding tool of the present utility model, the replacement efficiency of the static shoulder shaft can be improved.

[0022] Specifically, the static shoulder is detachably connected to the housing. Since the housing is firmly connected to the fixture, it is more convenient to disassemble and assemble the static shoulder.

[0023] The rotating assembly is rotatably connected to the housing and the static shoulder. Since the housing is firmly connected to the fixture. Therefore, in the working state, the housing and the static shoulder are in a static state, and the rotating assembly rotates relative to the housing. In this way, compared with the static shoulder rotating together with the main shaft, the static shoulder can provide better stability. Description of the Drawings

[0024] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 Schematic structural diagram of an embodiment of the combined stationary shoulder friction stir welding tool of the present invention;

[0026] Figure 2 Exploded view of the stationary shoulder assembly of the present invention;

[0027] Figure 3 Schematic cross-sectional structure diagram of the stationary shoulder assembly of the present invention;

[0028] Figure 4 Schematic structural diagram of an embodiment of the rotating assembly of the present invention;

[0029] Figure 5 Schematic cross-sectional structure diagram of the rotating assembly of the present invention.

[0030] Explanation of reference numerals:

[0031] 1: Stationary shoulder assembly; 11: Stationary shoulder; 111: First bearing; 112: Positioning post; 113: Limit pin; 114: First L-shaped groove; 115: Spring piece; 116: Control rod; 12: Outer shell; 121: Second bearing; 123: Second L-shaped groove; 13: Second air outlet;

[0032] 2: Rotating assembly; 21: Tool shank; 22: Connecting shaft; 23: Stirring head; 24: Rivet; 25: Air inlet; 26: First air outlet; 27: Air duct; 28: Fan blade. Specific embodiments

[0033] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0034] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0035] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, "a plurality of" means two or more unless otherwise specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] The present disclosure will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0037] First, please refer to Figure 1 , Figure 1 , which is a schematic structural view of an embodiment of the combined stationary shoulder friction stir welding tool of the present utility model. As shown in Figure 1 , the combined stationary shoulder friction stir welding tool includes a stationary shoulder assembly 1 and a rotating assembly 2 rotatably inserted into the stationary shoulder assembly 1. A stirring head 23 is provided at the first end (the lower end in Figure 1 ) of the above-mentioned rotating assembly 2. In the assembled state, the above-mentioned stirring head 23 protrudes from the stationary shoulder assembly 1. The above-mentioned stationary shoulder assembly 1 is firmly connected to a fixture for controlling the movement of the stirring head 23. The second end (the upper end in Figure 1 ) of the above-mentioned rotating assembly 2 is connected to the main shaft. In the working state, the above-mentioned main shaft drives the rotating assembly 2 to rotate relative to the stationary shoulder assembly 1.

[0038] Next, please refer to Figure 2 and Figure 3 , Figure 2 , which is an exploded view of the stationary shoulder assembly of the present utility model; Figure 3This is a schematic cross-sectional structure diagram of the static shaft shoulder assembly of the present utility model. As Figure 2 and Figure 3 shown, the above-mentioned static shaft shoulder assembly 1 includes a detachable static shaft shoulder 11 and a housing 12. A first bearing 111 is fixedly provided on the inner wall of the above-mentioned static shaft shoulder 11, and a second bearing 121 is fixedly provided on the inner wall of the housing 12. In the assembled state, the above-mentioned housing 12 is firmly connected to the fixture. The lower end of the rotating assembly 2 passes through the inner rings of the first bearing 111 and the second bearing 121. In this way, in the working state, the main shaft drives the rotating assembly 2 and the inner rings of the first bearing 111 and the second bearing 121 to rotate, so that the static shaft shoulder 11 and the housing 12 do not rotate, thereby improving the stability of the tool.

[0039] On the upper end face of the above-mentioned static shaft shoulder 11 ( Figure 3 in the direction of Figure 3 ), two oppositely arranged positioning posts 112 can be fixedly provided. On the lower end face of the above-mentioned housing 12 ( Figure 3 in the direction of ), two positioning holes are provided. In the assembled state, the two positioning posts 112 are inserted into the two positioning holes one by one, so that the static shaft shoulder 11 and the housing 12 are concentrically arranged. The above-mentioned two positioning posts 112 and the positioning holes can limit the relative positions of the static shaft shoulder 11 and the housing 12, making the installation more accurate and improving the reliability of the tool.

[0040]

[0041] Furthermore, in order to facilitate the disassembly of the static shaft shoulder 11 and the housing 12 and improve the work efficiency of disassembly and assembly, two first L-shaped grooves 114 that are centrosymmetric with respect to the center of the upper end face of the static shaft shoulder 11 are provided on the upper end face of the above-mentioned static shaft shoulder 11. Two second L-shaped grooves 123 are provided on the lower end face of the housing 12, and the two first L-shaped grooves 114 and the two second L-shaped grooves 123 are symmetrically arranged. In the assembled state, the vertical sections of the first L-shaped grooves 114 and the two second L-shaped grooves 123 are communicated.

[0042] Continuing to refer to Figure 3, a spring piece 115 is arranged in each first L-shaped groove 114, so that Figure 3 Taking the spring piece 115 on the left side in Figure 3 as an example, the right end of the spring piece 115 is joined to the inner wall of the first L-shaped groove 114, and the left end of the spring piece 115 abuts against the first side of the limit pin 113 ( Figure 3 the right side shown). The spring piece 115 can be pre-compressed and is capable of applying a leftward acting force to the limit pin 113, such that the catch of the limit pin 113 fits onto the transverse section of the first L-shaped groove 114. The second side of the above-mentioned limit pin 113 (

[0043] the left side shown) is connected with a control rod 116. Through holes are arranged on both sides of the static shaft shoulder 11, and the two control rods 116 are slidably inserted into the two through holes in one-to-one correspondence, such that after the control rod 116 is stressed, it can drive the left limit pin 113 to move rightward.

[0044] Next, please refer to Figure 4 and Figure 5 , Figure 4 which are the schematic structural diagrams of an embodiment of the rotating assembly of the present utility model; Figure 5 which are the cross-sectional structural diagrams of the rotating assembly of the present utility model. As shown in Figure 4 and Figure 5 , the rotating assembly 2 includes a pull stud 24, a tool shank 21, and a connecting shaft 22 that are connected in sequence. The lower end of the stirring shaft is connected to the above-mentioned stirring head 23. In the assembled state, the upper end of the above-mentioned tool shank 21 ( Figure 1 the direction in) is connected to the pull stud 24, and the tool shank 21 is inserted into the inner rings of the above-mentioned first bearing 111 and second bearing 121. The stirring head 23 protrudes from the above-mentioned static shaft shoulder 11.

[0045] Furthermore, a plurality of air inlets 25 can be arranged on the outer circumference of the tool shank 21 facing the pull stud 24. The diameter of the connecting shaft 22 can be smaller than the lower end surface of the above-mentioned tool shank 21. Furthermore, a plurality of first air outlets 26 are arranged at the bottom end of the tool shank 21. An air duct 27 connecting the plurality of air inlets 25 and the plurality of air outlets is formed in the tool shank 21. A plurality of second air outlets 13 are arranged on the outer circumference of the static shoulder shaft, and at the same time, a plurality of fan blades 28 are arranged on the connecting shaft 22.

[0046] During the welding process, the tool shank 21, the connecting shaft 22 and the stirring head 23 rotate, causing the fan blades to rotate. During the rotation of the fan blades 28, the air flow inside the static shaft shoulder 11 can be pushed out from the second air outlet 13, creating a negative pressure inside the tool shank 21. External air can enter the air duct 27 from the air inlet 25 and enter the static shaft shoulder 11 from the first air outlet 26, and finally be discharged from the second air outlet 13. In this way, the heat inside the tool shank 21 is taken away during the welding process, improving the service life of the tool.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A combined stationary shoulder friction stir welding tool, characterized in that, It includes a stationary shaft shoulder assembly and a rotating assembly. Among them, the stationary shaft shoulder assembly includes a stationary shaft shoulder and a housing that are detachably connected. A first bearing is fixedly provided on the inner wall of the stationary shaft shoulder, and a second bearing is fixedly provided on the inner wall of the housing; the first end of the rotating assembly is inserted into the inner rings of the first bearing and the second bearing; the second end of the rotating assembly is connected to the main shaft; the housing is firmly connected to the fixture; in the working state, the main shaft drives the rotating assembly to rotate relative to the stationary shaft shoulder assembly.

2. The combined stationary shoulder friction stir welding tool according to claim 1, characterized in that, Two oppositely arranged positioning posts are fixedly provided on the upper end face of the stationary shaft shoulder, and two positioning holes are provided on the lower end face of the housing; in the assembled state, the two positioning posts are inserted into the two positioning holes one by one.

3. The combined stationary shoulder friction stir welding tool according to claim 1, characterized in that, Two first L-shaped grooves that are centrosymmetric with respect to the center of the circle are provided on the upper end face of the stationary shaft shoulder; a limit pin with hooks at both ends is movably arranged in each of the first L-shaped grooves; two second L-shaped grooves corresponding to the two first L-shaped grooves are provided on the lower end face of the housing; as the limit pin moves towards or away from the center of the circle of the stationary shaft shoulder, the two hooks of the limit pin are separated from and engaged with the transverse sections of the first L-shaped groove and the second L-shaped groove respectively.

4. The combined stationary shoulder friction stir welding tool according to claim 3, wherein, The vertical sections of the first L-shaped groove and the second L-shaped groove are larger than the width of the limit pin.

5. The combined stationary shoulder friction stir welding tool according to claim 4, wherein A spring piece is arranged in each of the first L-shaped grooves. One end of the spring piece is engaged with the inner wall of the first L-shaped groove, and the other end of the spring piece abuts against the first side of the limit pin.

6. The combined stationary shoulder friction stir welding tool according to claim 5, characterized in that, A control rod is connected to the second side of each limit pin, and the control rod slidably passes through the stationary shaft shoulder.

7. The combined stationary shoulder friction stir welding tool according to claim 6, characterized in that, Through holes are provided on both sides of the stationary shaft shoulder, and the two control rods are slidably inserted into the two through holes one by one.

8. The combined stationary shoulder friction stir welding tool according to claim 7, wherein The maximum distance that the control rod protrudes from the stationary shaft shoulder is greater than the width of the hook of the limit pin.

9. The combined stationary shoulder friction stir welding tool according to claim 1, characterized in that, The rotating assembly includes a tool shank, a connecting shaft, and a stirring head that are connected in sequence. The tool shank is inserted into the first bearing and the second bearing, and the stirring head protrudes from the stationary shaft shoulder.

10. The combined stationary shoulder friction stir welding tool according to claim 9, wherein, The tool shank is also connected with a pull stud, and the pull stud is connected to the main shaft.

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