Novel stirring needle structure applied to friction stir welding tool

Abstract

The utility model discloses a novel stirring needle structure applied to a friction stir welding cutter, which relates to the technical field of friction stir welding and comprises a stirring needle provided with a stopping part, the upper part and the lower part of the stopping part of the stirring needle respectively form a fixed section and a working section, the fixed section is inserted into a mounting cavity at the bottom of a cutter handle, and the working section is inserted into a mounting cavity at the bottom of the cutter handle. An abutting wedge face is arranged on the side portion of the fixing section, and a fastener with one end extending into the mounting cavity is arranged on the cutter handle. Through the arrangement of the stop part and the fastener, after the fastener completes locking action, the stop part can abut against the end face of the bottom of the cutter handle, at the moment, the fixed section located in the installation cavity can be locked by the fastener, and the stop part located outside the installation cavity can be subjected to abutting acting force of the end face of the bottom of the cutter handle; and when the stirring needle is used for welding work subsequently, the fixed section and the working section of the stirring needle are stressed, so that the whole stirring needle is stressed uniformly, and normal welding work can be carried out.

Description

Technical Field

[0001] The utility model relates to the technical field of friction stir welding, in particular to a novel stirring needle structure applied to a friction stir welding tool. Background Art

[0002] Friction stir welding refers to the use of the heat generated by the friction between the high-speed rotating welding tool and the workpiece to partially melt the material to be welded. When the welding tool moves forward along the welding interface, the plasticized material flows from the front to the back of the welding tool under the action of the rotating friction force of the welding tool, and forms a dense solid phase weld under the extrusion of the welding tool.

[0003] After searching, the patent document with authorization announcement number CN207982535U discloses a stirring head with a self-locking and adjustable stirring needle, the stirring head includes a knife rod, a knife body, and a stirring needle, a mounting plane is arranged on the outer wall of the rear end of the knife body, an inclined fixing hole is arranged on the outer wall of the front end of the knife body, an anti-slip thread is arranged on the outer wall of the middle part of the knife body, an inner mounting hole is arranged inside the knife body, the knife rod is arranged in the inner mounting hole, a first top screw is arranged behind the knife rod, a second top screw is arranged behind the first top screw, the stirring needle is arranged in front of the knife rod, an inclined groove is arranged on the side wall of the stirring needle, and a threaded cone is arranged in front of the stirring needle.

[0004] The above-mentioned stirring head realizes longitudinal locking of the stirring needle through the setting of the first top screw and the second top screw, and realizes lateral locking of the stirring needle through the setting of the inclined top screw. However, the longitudinal locking and lateral locking both act on the end of the stirring needle located inside the blade body, while the end of the stirring needle located outside the blade body (the threaded cone end) is not subject to the limiting force; during the subsequent downward pressure use process, the end of the stirring needle located outside the blade body is prone to slight deformation and bending at a certain angle, which will cause the length of the stirring needle to be shortened, and then it will be unable to extend to the corresponding welding point, resulting in insufficient welding depth; even worse, if the deformation bending angle is too large, during the welding process, the stirring needle may be welded to the bottom end face of the blade body.

[0005] Therefore, we propose a new stirring pin structure applied to friction stir welding tools to solve the problems in the prior art. Utility Model Content

[0006] The purpose of the utility model is to solve the problems in the prior art and to propose a new stirring needle structure applied to stir friction welding tools. The stirring needle structure can be locked both inside and outside the tool handle, so that the stirring needle is evenly stressed as a whole during operation, and will not deform or shorten as a whole, so that normal welding work can be carried out.

[0007] In order to solve the above problems, the utility model provides the following technical solutions:

[0008] A new stirring needle structure used for a friction stir welding tool comprises a stirring needle with a stopper portion, wherein the upper and lower parts of the stirring needle located at the stopper portion respectively constitute a fixed section and a working section, wherein the fixed section is inserted and installed in a mounting cavity at the bottom of a tool handle, and a side portion of the fixed section is provided with an abutting wedge surface, and the tool handle is provided with a fastener having one end extending into the interior of the mounting cavity, and the end of the fastener cooperates with the abutting wedge surface oblique wedge, so that when the fastener is locked, the stopper portion has a movement tendency to move toward the bottom end surface of the tool handle.

[0009] As a further solution of the utility model: the fastener includes a threaded section threadedly arranged on the tool handle and a conical section fixedly connected to the threaded section, and one end of the conical section extends into the installation cavity and presses against the abutting wedge surface.

[0010] As a further solution of the utility model: the bevel angle on the conical section is set to 10° to 20°.

[0011] As a further solution of the utility model: an open groove facing the conical section is opened on the side of the fixed section, and the upper groove wall of the open groove constitutes a contact wedge surface pressed against the conical section.

[0012] As a further solution of the utility model: the open groove is configured as a trumpet-shaped blind hole with a thick mouth and a narrow bottom which is radially recessed on the fixed section.

[0013] As a further solution of the utility model: the stopper comprises a circular baffle which is integrally formed with the stirring needle, and the circular baffle is coaxially arranged with the stirring needle.

[0014] As a further solution of the utility model: the circular baffle is matched with the size of the bottom end surface of the handle.

[0015] As a further solution of the utility model: a threaded hole for assembling the threaded section is provided on the tool handle.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. Through the setting of the stopper and the fastener, after the fastener completes the locking action, the stopper will be pressed against the bottom end face of the tool handle. At this time, the fixed section inside the installation cavity will be subject to the locking action of the fastener, and the stopper outside the installation cavity will be subject to the pressing force of the bottom end face of the tool handle. When the stirring needle is used for subsequent welding work, the fixed section inside the tool handle and the working section outside the tool handle are both subjected to force, so that the stirring needle is subjected to uniform force as a whole, and there will be no deformation or overall retreat and shortening problems, so normal welding work can be carried out.

[0018] 2. Through the adaptation of the open groove and the conical section, the upper groove wall of the open groove constitutes a contact wedge surface that presses against the conical section. The conical section will always be accommodated by the open groove during the movement, ensuring the stability of the stirring needle being driven to move upward. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the overall cross-sectional structure of the utility model;

[0021] Figure 2 This is a partial cross-sectional view of the utility model. Figure 1 ;

[0022] Figure 3 This is a partial cross-sectional view of the utility model. Figure 2 ;

[0023] Figure 4 This is a partial cross-sectional view of the utility model. Figure 3 .

[0024] In the figure: 1, stirring needle; 101, fixed section; 102, working section; 2, stopper; 3, tool handle; 301, mounting cavity; 4, abutting wedge surface; 5, fastener; 501, threaded section; 502, conical section; 6, open groove; 7, threaded hole. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] like Figure 1-Figure 4 As shown, a new stirring needle structure applied to a friction stir welding tool includes a stirring needle 1 provided with a stopper 2, and the upper and lower parts of the stirring needle 1 located at the stopper 2 respectively constitute a fixed section 101 and a working section 102, that is, the fixed section 101 plays a role of installation and assembly, and the working section 102 plays a role of stirring welding. Specifically: the fixed section 101 is inserted and installed in the installation cavity 301 at the bottom of the tool handle 3, and the side of the fixed section 101 is provided with an abutting wedge surface 4, and the tool handle 3 is provided with a fastener 5 with one end extending into the interior of the installation cavity 301, and this end of the fastener 5 is in an oblique wedge fit with the abutting wedge surface 4, so that when the fastener 5 is locked, the stopper 2 has a tendency to move toward the bottom end surface of the tool handle 3. As shown Figure 1As shown, after the fastener 5 completes the locking action, the stop portion 2 will be pressed against the bottom end surface of the shank 3, and then the fixed section 101 located inside the installation cavity 301 will be subject to the locking action of the fastener 5, and the stop portion 2 located outside the installation cavity 301 will be subject to the pressing force of the bottom end surface of the shank 3. When the stirring needle 1 is subsequently used for welding, the stirring needle 1 is subjected to uniform force as a whole, will not be deformed, and normal welding work can be performed.

[0027] like Figure 2-Figure 4 As shown, for the arrangement of the fastener 5, the fastener 5 includes a threaded section 501 threadedly arranged on the handle 3. Specifically, the handle 3 is provided with a threaded hole 7 for assembling the threaded section 501. At the same time, the fastener 5 also includes a conical section 502 fixedly connected to the threaded section 501, and one end of the conical section 502 extends into the mounting cavity 301 and presses against the abutting wedge surface 4. When the threaded section 501 is driven to rotate for locking, the conical section 502 presses against the abutting wedge surface 4 and drives the abutting wedge surface 4 to move upward. The upward movement of the abutting wedge surface 4 can drive the fixed section 101 to move upward, thereby realizing the abutment between the stopper 2 and the bottom end surface of the handle 3.

[0028] When the fastener 5 is configured as a threaded section 501 and a conical section 502 , preferably, the bevel angle on the conical section 502 is set to 10° to 20°. Of course, the angle of the abutting wedge surface 4 is also configured to match the bevel angle.

[0029] It should be noted that in this embodiment, the fastener 5 is configured as a threaded section 501 and a conical section 502 for schematic illustration, but in actual use, it is not limited to this configuration. Specifically, the threaded section 501 can also be replaced by a rod that moves horizontally, and the horizontal movement of the rod on the handle 3 can also achieve a locking effect.

[0030] like Figure 3-Figure 4 As shown, in order to facilitate better fitting and pressing between the conical section 502 and the abutting wedge surface 4, an open groove 6 facing the conical section 502 can be opened on the side of the fixed section 101, and the upper groove wall of the open groove 6 constitutes the abutting wedge surface 4 abutting against the conical section 502. Further, the open groove 6 can be set as a trumpet-shaped blind hole with a thick mouth and a narrow bottom radially recessed on the fixed section 101.

[0031] like Figure 4 As shown, for the setting of the above-mentioned stopper 2, the stopper 2 can be set to include a circular baffle formed integrally with the stirring needle 1, and the circular baffle is coaxially arranged with the stirring needle 1. Of course, the circular baffle and the stirring needle 1 can also be connected in other ways, such as welding. At the same time, the circular baffle is set to match the size of the bottom end surface of the handle 3.

[0032] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A novel stirring needle structure used in a friction stir welding tool, characterized in that: The invention comprises a stirring needle (1) on which a stopper (2) is arranged, and the upper and lower parts of the stirring needle (1) located on the stopper (2) respectively constitute a fixed section (101) and a working section (102), the fixed section (101) being inserted and installed in a mounting cavity (301) at the bottom of a tool handle (3), and a side of the fixed section (101) is provided with an abutting wedge surface (4), and the tool handle (3) is provided with a fastener (5) having one end extending into the interior of the mounting cavity (301), and the end of the fastener (5) is wedge-matched with the abutting wedge surface (4), so that when the fastener (5) is locked, the stopper (2) has a tendency to move toward the bottom end surface of the tool handle (3).

2. According to claim 1, a novel stirring needle structure applied to a friction stir welding tool is characterized in that: The fastener (5) comprises a threaded section (501) threadedly arranged on the tool handle (3) and a conical section (502) fixedly connected to the threaded section (501), and one end of the conical section (502) extends into the installation cavity (301) and presses against the abutting wedge surface (4).

3. A novel stirring needle structure for a friction stir welding tool according to claim 2, characterized in that: The oblique angle on the conical section (502) is set to 10° to 20°.

4. A novel stirring needle structure for a friction stir welding tool according to claim 2 or 3, characterized in that: An open groove (6) facing the conical section (502) is provided on the side of the fixed section (101), and the upper groove wall of the open groove (6) forms a contact wedge surface (4) that presses against the conical section (502).

5. The novel stirring needle structure used for a friction stir welding tool according to claim 4, characterized in that: The open groove (6) is configured as a trumpet-shaped blind hole with a thick mouth and a narrow bottom which is radially recessed on the fixing section (101).

6. A novel stirring needle structure for a friction stir welding tool according to any one of claims 1 to 3, characterized in that: The stopper (2) comprises a circular stopper formed integrally with the stirring needle (1), and the circular stopper is coaxially arranged with the stirring needle (1).

7. The novel stirring needle structure used for a friction stir welding tool according to claim 6, characterized in that: The circular baffle is adapted to the size of the bottom end surface of the knife handle (3).

8. A novel stirring needle structure for a friction stir welding tool according to claim 2 or 3, characterized in that: The knife handle (3) is provided with a threaded hole (7) for assembling the threaded section (501).

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