A friction stir welding tooling

Abstract

The present invention discloses a friction stir welding tooling, which includes a fixed seat. A stirring pin assembly is arranged on one side of the fixed seat. A motor for enabling the stirring pin assembly to work is arranged on the fixed seat. A blowing assembly for cooling the skirt burrs and a cleaning assembly for cutting and collecting the skirt burrs located on the weld seam are also arranged on the fixed seat. An accommodating groove with one end open is formed in the cleaning assembly. An accommodating and separating part communicated with the cleaning assembly and a recovery driving source part for recovering the skirt burrs in the cleaning assembly to the accommodating and separating part for accommodation are arranged in the fixed seat. The beneficial effect of the present invention is that while performing friction stir welding, it can also process the skirt burrs generated by the friction stir welding.

Description

Technical Field

[0001] The present invention relates to the technical field of friction welding, and specifically to a friction stir welding tooling. Background Art

[0002] Friction stir welding technology was invented by The Welding Institute (TWI) in the UK in 1991, and a patent for invention was applied for in the UK the following year, and patent protection was successively applied for in various countries around the world. Since it has been protected by patents and made public, friction stir welding technology has been increasingly widely used first and mainly in the field of lightweight metal structures such as aluminum alloys and magnesium alloys, and has also achieved certain development in the field of high melting point materials.

[0003] The friction stir welding method is the same as the conventional friction welding. Friction stir welding also uses frictional heat and plastic deformation heat as the welding heat source. The difference is that in the friction stir welding process, a cylinder or other shape (such as a threaded cylinder) of a welding pin extends into the joint of the workpiece, and through the high-speed rotation of the welding head, it rubs against the welding workpiece material, so that the temperature of the material at the connection part rises and softens. At the same time, the material is stirred and rubbed to complete the welding.

[0004] Reference Figure 1 , when using this technology to weld the first workpiece 01 and the second workpiece 02, a press head needs to be used to press the softened part to control the deformation at the weld seam and ensure the density of the material at the same time. Because the workpiece at the weld seam expands due to heat (volume increases), the extrusion process of the press head will generate skirt burrs 03 in the shape of "skirt" at the edge of the weld seam, resulting in an unsightly and uneven weld seam. Workers need to process these skirt burrs 03 to repair them to make them flat and beautiful. In the prior art, after the welding is completed and the first workpiece 01 and the second workpiece 02 are cooled, a milling machine or manually using a tool is used to remove these skirt burrs 03 to complete the repair of the weld seam. However, this greatly reduces the work efficiency, and the cleaning and repair effects are poor. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and propose a friction stir welding tooling to solve the above problems.

[0006] The object of the present invention is achieved by the following technical solutions: A friction stir welding tooling, including a fixed seat, on one side of the fixed seat is provided with a stirring pin assembly, on the fixed seat is provided with a motor for making the stirring pin assembly work, on the fixed seat is also provided with a blowing assembly for cooling the skirt burrs and a cleaning assembly for cutting and collecting the skirt burrs located on the weld seam. An accommodating groove with one end open is formed in the cleaning assembly, and an accommodating and separating part communicated with the cleaning assembly and a recovery driving source part for recovering the skirt burrs in the cleaning assembly to the accommodating and separating part for accommodation are arranged in the fixed seat.

[0007] The accommodating and separating part is formed by connecting a cyclone separating part for separating the air flow from the skirt burrs and an accommodating part for accommodating the skirt burrs.

[0008] The cyclone separating part includes a conical shell with a hollow interior. An air inlet pipe, an air outlet pipe and a discharge pipe are arranged on the cyclone separating part. The discharge pipe is communicated with the accommodating part. The diameter of the end of the conical shell connected to the discharge pipe is the smallest. The air inlet pipe is arranged around the outer wall of the conical shell and is communicated with the cleaning assembly. The air outlet pipe is communicated with the recovery driving source part.

[0009] The stirring pin assembly includes a shell fixedly arranged on one side of the fixed seat and having an opening on the side far from the fixed seat. A rotating base is rotatably arranged on the inner wall of the shell. A telescopic motor is arranged on the side of the rotating base far from the shell. A stirring pin is arranged on the side of the telescopic motor far from the rotating base. A through port communicated with the accommodating and separating part is arranged on one side of the shell.

[0010] A solenoid valve for controlling the connection and disconnection between the shell and the accommodating and separating part is arranged between the shell and the accommodating and separating part.

[0011] The recovery driving source part is respectively communicated with the accommodating and separating part and the blowing assembly. The recovery driving source part makes the air flow enter from the cleaning assembly and be discharged from the blowing assembly.

[0012] A condensing part communicated with both of them is arranged between the outlet of the recovery driving source part and the outlet of the blowing assembly.

[0013] A driving fan is arranged in the recovery driving source part. The output end of the motor is connected to a rotating rod located in the fixed seat. A first driving gear is arranged on the rotating rod. The first driving gear meshes with a first driven gear, and the first driven gear is connected to the driving fan.

[0014] The beneficial effects of the present invention are:

[0015] (1)While the present invention is performing friction stir welding, the air blowing assembly blows air onto the weld seam, causing the skirt burrs on the weld seam to cool down and solidify onto the weld seam. Subsequently, the cleaning assembly cuts off the solidified skirt burrs from the weld seam and collects them into the storage groove, and the recovery drive source part sucks the skirt burrs in the storage groove to the storage and separation part for storage. The present invention realizes that while performing friction stir welding, it can also process the skirt burrs generated by friction stir welding, with high processing efficiency and good processing effect.

[0016] (2)The present invention is provided with a recovery drive source part which is respectively connected to the storage and separation part and the air blowing assembly. The recovery drive source part enables the air flow to enter from the cleaning assembly and be discharged from the air blowing assembly. In the same working state, it realizes sucking the skirt burrs from the storage groove to the storage and separation part, and also realizes supplying air to the air blowing assembly, causing the skirt burrs on the weld seam to quickly cool down and solidify on the weld seam.

[0017] (3)The motor of the present invention drives the stirring pin assembly and the recovery drive source part to work simultaneously, realizing that a single drive source can perform two different tasks simultaneously, and also ensuring that while friction stir welding is being carried out, the collection and cleaning of the skirt burrs are also in progress.

[0018] (4)By connecting the housing to the storage and separation part, a telescopic motor is arranged inside the housing. When the friction stir welding is completed, a keyhole will appear. At this time, the telescopic motor raises the stirring pin, and the skirt burrs in the storage and separation part enter the keyhole through the notch. The telescopic motor drives the stirring pin to press down, compacts the skirt burrs in the keyhole, and the stirring pin rotates again, causing the skirt burrs to heat up, melt, and finally cool and solidify in the keyhole, thus completing the filling of the keyhole and solving the technological problem of the keyhole left by friction stir welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of production in the prior art;

[0020] Figure 2 Front view of the present invention;

[0021] Figure 3 Cross-sectional view of the present invention;

[0022] Figure 4 Schematic diagram of the structure of the storage and separation part;

[0023] Figure 5 Cutting schematic diagram of the cleaning assembly;

[0024] In the figure, 01 - the first workpiece, 02 - the second workpiece, 03 - burr, 1 - fixed seat, 2 - stirring needle assembly, 201 - housing, 202 - rotating base, 203 - telescopic motor, 204 - stirring needle, 3 - motor, 301 - rotating rod, 302 - first driving gear, 4 - air blowing assembly, 5 - cleaning assembly, 501 - storage groove, 6 - storage and separation part, 601 - cyclone separation part, 602 - storage part, 603 - conical housing, 604 - air inlet pipe, 605 - air outlet pipe, 606 - discharge outlet pipe, 7 - recovery drive source part, 701 - drive fan, 702 - first driven gear, 8 - condenser, 801 - air inlet, 802 - air outlet, 803 - water inlet, 804 - water outlet. Detailed implementation manners

[0025] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention.

[0026] It should be noted that in the following solutions, the orientation concepts of "left", "right", "up", "down", "front", "rear", "inner", and "outer" are all relative directions, and will not be listed one by one here.

[0027] A friction stir welding tooling, referring to Figure 2 and Figure 5 , includes a fixed seat 1. A friction stir welding body assembly 2 is arranged on the lower side of the fixed seat 1, an air blowing assembly 4 located on the right side of the friction stir welding body assembly 2, and a cleaning assembly 5 located on the right side of the air blowing assembly 4. A cutter for cutting the solidified skirt burr 03 on the weld is arranged on the lower side of the cleaning assembly 5, and a storage groove 501 with an opening on the left side is arranged inside the cleaning assembly 5. A motor 3 for making the friction stir welding body 2 work is arranged on the upper side of the fixed seat 1. The shape and size of the cleaning assembly 5 match the formed weld.

[0028] For those skilled in the art, a separate air blowing source can be set for the air blowing assembly 4. A separate negative pressure source can also be set for the cleaning assembly 5. The air blowing assembly 4 can be not fixedly sleeved on the outer wall of the friction stir welding body 2, and can be arranged adjacent to the left end of the friction stir welding body 2. However, this solution is not adopted in this embodiment.

[0029] Referring to Figure 3, the friction stir welding body assembly 2 includes a housing 201 fixedly arranged on the lower side of the fixed seat 1. A rotating base 202 is rotatably arranged inside the housing 201. A telescopic motor 3 is arranged at the lower end of the rotating base 202. A stirring pin 204 is arranged at the lower end of the telescopic motor 3. A rotating rod 301 is connected to the lower end of the motor 3. The rotating rod 301. The rotating rod 301 is connected to the rotating base 202 at its lower end. A condensing member 8 is arranged inside the air suction assembly 4. In this structure, the bottom of the housing 201 acts as a pressure head during operation to control the deformation at the weld and ensure the density of the material.

[0030] A storage and separation part 6, a recovery drive source part 7 and a condensing member 8 are arranged inside the fixed seat 1. The storage groove 501, the storage and separation part 6, the recovery drive source 7, and the condensing member 8 are connected in sequence. The air flow enters from inside the storage groove 501, passes through the storage and separation part 6, the recovery drive source 7, and the condensing member 8 in sequence, and finally discharges from the lower end opening of the blowing assembly 5.

[0031] Reference Figure 5 , the storage and separation part 6 is formed by connecting a cyclone separation part 601 and a storage part 602. The cyclone separation part 602 includes a conical housing 603. A discharge port pipe 606 is connected to the lower end of the conical housing 603. The discharge port pipe 606 is communicated with the storage part 602. The lower end of the conical housing 603 is the smallest. An air inlet pipe 604 and an air outlet pipe 605 are connected to the conical housing 603 and are spirally arranged around its outer wall. The air inlet pipe 604 is communicated with the storage groove 501. The air outlet pipe 75 is communicated with the recovery drive source part 6. A filter screen is arranged at the air outlet pipe 605.

[0032] The upper end of the recovery drive source part 7 is communicated with the air outlet pipe 605, and the lower end is communicated with the condensing member 8. A drive fan 701 is arranged inside the recovery drive source part 7. A first driven gear 702 for driving its rotation is connected to the center of the drive fan 701. A first drive gear 302 is sleeved on the rotating rod 301, and the first drive gear 302 and the first driven gear 702 are meshed with each other.

[0033] The condensing member 8 includes an air inlet 801 communicated with the recovery drive source 7, an air outlet 802 communicated with the lower end opening of the blowing assembly 4. It also includes a water inlet 803 and a water outlet 804. Both the water inlet 803 and the water outlet 804 are communicated with a water pumping pump arranged outside this embodiment. The water pumping pump is used to realize the water circulation inside the condensing member 8 and cool it down.

[0034] A notch is formed on one side of the housing 201, and the storage part 602 is communicated with the notch through a connecting pipe. An electromagnetic valve for closing and opening is arranged on the connecting pipe.

[0035] When performing friction stir welding, the motor 3 drives, and the stirring pin 204 rotates to weld the workpiece. The driving member on the outside of this embodiment drives the fixed seat 1 to move from right to left. The driving member is an existing driving device and will not be described in detail here. While the stirring pin 204 is rotating and working, the motor 3 also drives the driving fan 701 to rotate at the same time. The airflow generated by the driving fan 701 is discharged from the blowing assembly 4 through the condensing member 8, quickly cooling the skirt burr 03 that is still in the high-temperature melting state, so that the skirt burr 03 cools and solidifies at the weld. The skirt burr 03 solidified at the weld is cut by the subsequent cleaning assembly 5 and stored in the storage groove 501. The airflow generated by the driving fan 701 brings the skirt burr 03 into the storage and separation part 6. The storage and separation part 6 separates the airflow and the skirt burr 03, and the skirt burr 03 is stored in the storage part 602. The separated airflow then passes through the recovery driving source part 7 and the condensing member 8, and is discharged from the blowing assembly 4 to quickly cool the skirt burr 03 that is still in the high-temperature melting state.

[0036] When the friction stir welding is completed, keyholes will appear on the workpiece, making the workpiece unsightly and requiring corresponding repair of the keyholes. The telescopic motor 203 contracts, the stirring pin 204 retracts upward, and the notch of the housing 201 is exposed and is no longer blocked by the stirring pin 204. The solenoid valve is opened, and the skirt burr 03 in the storage part 602 falls into the keyhole through the connecting pipe and the notch under the influence of gravity. The telescopic motor 203 extends, the stirring pin 204 presses down to compact the skirt burr 03, and the motor 3 drives the stirring pin 204 to rotate, causing the skirt burr 03 to heat up and melt in the keyhole. The motor 3 stops working, and the skirt burr 03 in the keyhole cools and solidifies in the keyhole, thus realizing the filling of the keyhole. The filling material used is also the original material on the workpiece and there will be no obvious difference.

[0037] The above are only the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed within the scope of the concept described herein through the above teachings or the technology or knowledge in related fields. And the changes and alterations made by those skilled in the art that do not depart from the spirit and scope of the present invention should all be within the protection scope of the appended claims of the present invention.

Claims

1. A friction stir welding tooling, comprising a fixed seat (1), a stirring pin assembly (2) is arranged on one side of the fixed seat (1), and a motor (3) for enabling the stirring pin assembly (2) to work is arranged on the fixed seat (1), characterized in that, The fixed seat (1) is further provided with a blowing component (4) for cooling the skirt burrs (03) and a cleaning component (5) for cutting and collecting the skirt burrs (03) located on the weld seam. An accommodating groove (501) with one end open is formed in the cleaning component (5). An accommodating and separating part (6) communicated with the cleaning component (5) and a recovery driving source part (7) for recovering the skirt burrs (03) in the cleaning component (5) to the accommodating and separating part (6) for accommodation are arranged in the fixed seat (1). The accommodating and separating part (6) is formed by connecting a cyclone separating part (601) for separating air flow from the skirt burrs (03) and an accommodating part (602) for accommodating the skirt burrs (03). The cyclone separating part (601) includes a conical shell (603) with a hollow interior. An air inlet pipe (604), an air outlet pipe (605), and a discharge outlet pipe (606) are arranged on the cyclone separating part (601). The discharge outlet pipe (606) is communicated with the accommodating part (602). The diameter of one end of the conical shell (603) connected to the discharge outlet pipe (606) is the smallest. The air inlet pipe (604) is arranged around the outer wall of the conical shell (603). The air inlet pipe (604) is communicated with the cleaning component (5). The air outlet pipe (605) is communicated with the recovery driving source part (7). The recovery driving source part (7) is respectively communicated with the accommodating and separating part (6) and the blowing component (4). The recovery driving source part (7) makes the air flow enter the blowing component (4) from the cleaning component (5) and then be discharged. The recovery driving source part (7) is provided with a driving fan (701). The output end of the motor (3) is connected with a rotating rod (301) located in the fixed seat (1). A first driving gear (302) is arranged on the rotating rod (301). The first driving gear (302) meshes with a first driven gear (702). The first driven gear (702) is connected with the driving fan (701).

2. The friction stir welding tooling according to claim 1, characterized in that: The stirring needle assembly (2) includes a shell (201) fixedly arranged on one side of the fixed seat (1) and having an opening on the side far from the fixed seat (1). A rotating base (202) is rotatably arranged on the inner wall of the shell (201). A telescopic motor (203) is arranged on the side of the rotating base (202) far from the shell (201). A stirring needle (204) is arranged on the side of the telescopic motor (203) far from the rotating base (202). A through port communicated with the accommodating and separating part (6) is formed on one side of the shell (201).

3. The friction stir welding tooling according to claim 1, wherein: A solenoid valve for controlling the connection and disconnection between the shell (201) and the accommodating and separating part (6) is arranged therebetween.

4. A friction stir welding tooling according to claim 1, characterized in that: A condensing part (8) communicated with both is arranged between the recovery driving source part (7) and the air outlet of the blowing component (4).

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