Friction stir welding device and method for ultra-large metal rings

Abstract

The present invention discloses a friction stir welding device and method for oversized metal rings, belonging to the field of welding technology. The device comprises: a support member for fixed support; a first drive unit, disposed on the support member, for driving the metal ring to rotate; and a welding assembly, located on one side of the support member, for performing friction stir welding on the V-grooves of the metal rings. The device can promptly flatten and protect the weld seam, significantly improving the welding quality of the annular seam and reducing welding costs.

Description

Technical Field

[0001] The invention belongs to the technical field of welding, and in particular relates to a friction stir welding device and method for super-large metal rings. Background Art

[0002] Friction stir welding is an advanced solid-phase joining technology that has developed rapidly in recent years. It has technical advantages such as high efficiency and low consumption, low welding temperature, small residual stress, non-deformation of welded workpieces, and low environmental requirements. It has been widely recognized and paid attention to by various industries such as aviation and aerospace. The advancement of welding process equipment also symbolizes a country's industrial development level to a certain extent. Welding equipment is also gradually developing towards automation and intelligence.

[0003] The existing welding rings are small in size, and the stirring needles used for stir friction welding are also small in size. The welding distance is short, and the stirring needles need to be replaced frequently, resulting in increased welding costs and reduced welding efficiency. In addition, the newly formed weld cannot be flattened and protected in time, resulting in poor weld forming quality. Summary of the Invention

[0004] In order to solve the above problems, the present invention adopts the following technical solutions:

[0005] A friction stir welding device for ultra-large metal rings, comprising:

[0006] Support members, used for fixing supports;

[0007] a first driving part, the first driving part being provided on the supporting member and being used for driving the metal ring to rotate;

[0008] A welding assembly is located on one side of the support member and is used for performing friction stir welding on the V-groove of the metal ring member.

[0009] Furthermore, the support member includes a support base and a support rod; the support rod is vertically arranged on one side of the support base; the support rod is provided with a support plate, and the welding assembly is arranged on the support plate; the first driving part is arranged on the support base.

[0010] Furthermore, it also includes an air blowing gun, which is arranged upstream of the welding assembly along the rotation direction of the metal ring and fixedly installed on the support rod.

[0011] Furthermore, there are two first driving parts, and the two first driving parts are arranged opposite to each other on the support base; the support base is provided with a U-shaped groove, and the groove is located between the two first driving parts.

[0012] Furthermore, the first driving part includes a driving roller and a first motor; the first motor is fixed to the support base, and the driving end of the first motor is drivingly connected to the driving roller; the first motor drives the driving roller to rotate, thereby driving the metal ring to rotate.

[0013] Further, the welding assembly includes a second driving portion, a flattening portion and a core material;

[0014] The second driving portion is fixed to the support plate and is drivingly connected to the core material, and is used to drive the core material to rotate and move in an orderly manner along a determined trajectory into the V-shaped groove of the metal ring, and to provide a preset pressure to the contact surface between the V-shaped groove of the metal ring and the core material, so as to realize friction welding in the V-shaped groove of the metal ring;

[0015] The flattening portion is arranged downstream of the core material along the rotation direction of the metal ring and is fixedly mounted on the support rod, and is used for flattening the weld seam of the metal ring.

[0016] Furthermore, the second driving part includes a telescopic cylinder and a second motor;

[0017] The telescopic cylinder is fixedly mounted on the support rod; a first rotating wheel is provided at one end of the telescopic cylinder away from the support rod, and the first rotating wheel can rotate relative to the telescopic cylinder; the core material passes through the support rod, the telescopic cylinder, and the first rotating wheel, and is interference-fitted with the first rotating wheel;

[0018] The output end of the second motor is connected to the first transmission gear through a transmission drawer, and a second transmission gear is provided on the side of the first transmission gear close to the core material, and the first transmission gear and the second transmission gear are meshed with each other; the core material passes through the second transmission gear and is connected to the second transmission gear through a shaft sleeve; the first transmission gear and the second transmission gear are arranged in a gear box, and the gear box is connected to the support plate;

[0019] The central axis of the circle where the second transmission gear is located coincides with the central axis of the telescopic cylinder.

[0020] Furthermore, the welding assembly further includes two second rotating wheels, which are relatively arranged on both sides of the core material to limit the position of the core material.

[0021] Furthermore, the flattening portion includes a flattening wheel, which is fixedly connected to the support rod through a telescopic member and is used to flatten the weld of the metal ring.

[0022] Method for using the friction stir welding device for oversized metal rings:

[0023] S1, align the metal ring between the driving rollers on both sides of the support base, and ensure that the core material extends into the V-shaped groove of the metal ring;

[0024] S2, turn on the air blow gun, and the shielding gas blown out by the air blow gun protects the welded seam;

[0025] S3, turning on the first motor and the second motor; so that one end of the core material contacts the V-groove of the metal ring while rotating, and mutual friction generates heat; the core material is continuously consumed due to friction, and the telescopic cylinder ensures that the core material moves in an orderly manner along a predetermined trajectory into the V-groove of the metal ring, closely contacts the V-groove of the metal ring, and continuously fills the weld; the flattening wheel flattens the welded seam to ensure welding quality; the metal ring rotates to achieve welding of the entire annular seam;

[0026] S4, when the end of the core material away from the metal ring is close to the second driving gear, the material is loaded to achieve uninterrupted welding.

[0027] Beneficial effects:

[0028] When the metal ring is large in size, there is no need to constantly replace the core material, and continuous welding is possible, resulting in high welding efficiency. At the same time, the weld can be flattened and protected in a timely manner, greatly improving the welding quality of the ring seam and reducing welding costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a friction stir welding device for super-large metal rings of the present invention;

[0030] Figure 2 This is a partial view of a friction stir welding device for an oversized metal ring according to the present invention;

[0031] Figure 3 It is a partial cross-sectional view of a friction stir welding device for an oversized metal ring according to the present invention;

[0032] Figure 4 The present invention is a front view of a friction stir welding device for super-large metal rings.

[0033] Among them, 1. Support base; 2. First motor; 3. Reinforcement rib; 4. Drive roller; 5. Support rod; 6. Blow gun; 7. Support plate; 8. Second motor; 9. First transmission gear; 10. Second transmission gear; 11. Gear box; 12. Core material; 13. Flattening wheel; 14. Telescopic part; 15. Metal ring; 16. Telescopic cylinder; 17. First rotating wheel; 18. Second rotating wheel. DETAILED DESCRIPTION

[0034] Example 1

[0035] refer to Figure 1-4 , a friction stir welding device for ultra-large metal rings, comprising:

[0036] Support members, used for fixing supports;

[0037] A first driving part, which is provided on the support member and is used to drive the metal ring 15 to rotate;

[0038] The welding assembly is located on one side of the support member and is used to perform friction stir welding on the V-groove of the metal ring member 15 .

[0039] Preferably, the support member includes a support base 1 and a support rod 5; the support rod 5 is vertically arranged on one side of the support base 1; the support rod 5 is provided with a support plate 7, and the welding assembly is arranged on the support plate; the first driving part is arranged on the support base 1.

[0040] In other embodiments, the support rod 5 is fixed to the ground via a flange.

[0041] Preferably, an air blowing gun 6 is further included. The air blowing gun 6 is arranged upstream of the welding assembly along the rotation direction of the metal ring 15 and is fixedly installed on the support rod 5.

[0042] In this embodiment, the muzzle of the air blowing gun 6 is directed toward the welding position of the metal ring 15, and protective gas is blown out to prevent the new weld from being oxidized.

[0043] Preferably, two first driving parts are provided, and the two first driving parts are arranged opposite to each other on the support base 1; the support base 1 is provided with a U-shaped groove, and the groove is located between the two first driving parts.

[0044] Preferably, the first driving part includes a driving roller 4 and a first motor 2; the first motor 2 is fixed to the support base 1, and the driving end of the first motor 2 is drivingly connected to the driving roller 4; the first motor 2 drives the driving roller 4 to rotate, which is used to drive the metal ring 15 to rotate.

[0045] In this embodiment, the first motors 2 of the two driving parts rotate in the same direction, thereby driving the metal ring 15 to rotate; the metal ring 15 is an extra-large metal ring with a diameter of 3-4m and a wall thickness of 300-400mm; the metal ring 15 can rely on its own weight to be in close contact with the driving roller 4 on the support base 1 and cannot be offset; reinforcing ribs 3 are symmetrically installed on both sides of the support base 1 close to the driving roller 4 to prevent the metal ring 15 from bending the two sides of the support base 1.

[0046] In other embodiments, the metal ring 15 rotates counterclockwise toward the first motor 2 .

[0047] Preferably, the welding assembly includes a second driving portion, a flattening portion and a core material 12;

[0048] The second driving part is fixed on the support plate 7 and is connected to the core material 12. It is used to drive the core material 12 to rotate and move in an orderly manner along a predetermined trajectory into the V-shaped groove of the metal ring 15, and to provide a preset pressure to the contact surface between the V-shaped groove of the metal ring 15 and the core material 12, so as to achieve friction welding in the V-shaped groove of the metal ring 15;

[0049] The flattening portion is arranged downstream of the core material 12 along the rotation direction of the metal ring 15 and is fixedly mounted on the support rod 5 for flattening the weld seam of the metal ring 15 .

[0050] Preferably, the second driving unit includes a telescopic cylinder 16 and a second motor 8;

[0051] The telescopic cylinder 16 is fixedly mounted on the support rod 5; a first rotating wheel 17 is provided at one end of the telescopic cylinder 16 away from the support rod 5, and the first rotating wheel 17 can rotate relative to the telescopic cylinder 16; the core material 12 passes through the support rod 5, the telescopic cylinder 16, and the first rotating wheel 17, and has an interference fit with the first rotating wheel 17;

[0052] The output end of the second motor 8 is connected to the first transmission gear 9 through a transmission drawer. A second transmission gear 10 is provided on the side of the first transmission gear 9 close to the core material 12. The first transmission gear 9 and the second transmission gear 10 are meshed with each other; the core material 12 passes through the second transmission gear 10 and is connected to the second transmission gear 10 through a shaft sleeve; the first transmission gear 9 and the second transmission gear 10 are arranged in a gear box, and the gear box 11 is connected to the support plate 7;

[0053] The central axis of the circle where the second transmission gear 10 is located coincides with the central axis of the telescopic cylinder 16 .

[0054] Since the first transmission gear 9 and the second transmission gear 10 are engaged with each other, the first rotating wheel 17 can rotate relative to the telescopic cylinder 16; the second motor 8 drives the first transmission gear 9 to drive the second transmission gear 10 to rotate, thereby driving the core material 12 to rotate; the telescopic cylinder 16 drives the core material 12 to approach the metal ring 15.

[0055] In this embodiment, the core material 12 is flat, and there is a clearance fit between the core material 12 and the shaft sleeve, and there is an interference fit between the shaft sleeve and the second transmission gear 10.

[0056] Preferably, the welding assembly further includes two second rotating wheels 18 , which are relatively arranged on both sides of the core material 12 to limit the position of the core material 12 .

[0057] In other embodiments, the second runner 18 is connected to the support plate 7 via a bearing 11;

[0058] Preferably, the flattening part includes a flattening wheel 13, which is fixedly connected to the support rod 5 through a telescopic member 14. The telescopic member 14 is used to make the flattening wheel 13 fit tightly with the weld of the metal ring 15, so as to flatten the weld of the metal ring 15.

[0059] In this embodiment, the telescopic member 14 is a telescopic rod, a fixed end of the telescopic rod is fixedly connected to the support rod 5 , and a telescopic end of the telescopic rod is fixedly connected to the flattening wheel 13 .

[0060] Example 2

[0061] This embodiment is a method for using the friction stir welding device for super-large metal rings provided in Example 1:

[0062] S1, align the metal ring 15 between the driving rollers on both sides of the support base 1, ensuring that the core material 12 extends into the V-shaped groove of the metal ring 15;

[0063] S2, open the air blowing gun 6, and the protective gas blown by the air blowing gun 6 protects the welded weld;

[0064] S3, turning on the first motor 2 and the second motor 8; so that one end of the core material 12 contacts the V-shaped groove of the metal ring 15 while rotating, and friction between them generates heat; the core material 12 is continuously consumed due to friction, and the telescopic cylinder 16 ensures that the core material 12 moves in an orderly manner along a determined trajectory into the V-shaped groove of the metal ring 15, and contacts the V-shaped groove of the metal ring 15 closely, continuously filling the weld; the flattening wheel 13 flattens the welded seam to ensure welding quality; the metal ring 15 rotates to achieve welding of the entire annular seam;

[0065] S4, when the end of the core material 12 away from the metal ring 15 approaches the second transmission gear 10, loading begins to achieve uninterrupted welding.

[0066] The super-large metal ring in the present invention refers to a metal ring with a diameter of 3-4 mm and a wall thickness of 300-400 mm.

[0067] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A friction stir welding device for super-large metal rings, characterized in that: include: Support members, used for fixing supports; a first driving part, the first driving part being provided on the supporting member and being used for driving the metal ring to rotate; a welding assembly, the welding assembly being located on one side of the support member and being used for performing friction stir welding on the V-groove of the metal ring member; The support member includes a support base and a support rod; the support rod is vertically arranged on one side of the support base; the support rod is provided with a support plate, and the welding assembly is arranged on the support plate; the first driving part is arranged on the support base; The welding assembly includes a second driving portion, a flattening portion and a core material; The second driving portion is fixed to the support plate and is drivingly connected to the core material, and is used to drive the core material to rotate and move in an orderly manner along a determined trajectory into the V-shaped groove of the metal ring, and to provide a preset pressure to the contact surface between the V-shaped groove of the metal ring and the core material, so as to realize friction welding in the V-shaped groove of the metal ring; The flattening portion is arranged downstream of the core material along the rotation direction of the metal ring and is fixedly mounted on the support rod, and is used to flatten the weld seam of the metal ring; The second driving part includes a telescopic cylinder and a second motor; The telescopic cylinder is fixedly mounted on the support rod; a first rotating wheel is provided at one end of the telescopic cylinder away from the support rod, and the first rotating wheel can rotate relative to the telescopic cylinder; the core material passes through the support rod, the telescopic cylinder, and the first rotating wheel, and is interference-fitted with the first rotating wheel; The output end of the second motor is connected to the first transmission gear through a transmission drawer, and a second transmission gear is provided on the side of the first transmission gear close to the core material, and the first transmission gear and the second transmission gear are meshed with each other; the core material passes through the second transmission gear and is connected to the second transmission gear through a shaft sleeve; the first transmission gear and the second transmission gear are arranged in a gear box, and the gear box is connected to the support plate; The central axis of the circle where the second transmission gear is located coincides with the central axis of the telescopic cylinder.

2. The friction stir welding device for super-large metal rings according to claim 1, characterized in that: It also includes an air blowing gun, which is arranged upstream of the welding assembly along the rotation direction of the metal ring and is fixedly installed on the support rod.

3. The friction stir welding device for super-large metal rings according to claim 1, characterized in that: There are two first driving parts, and the two first driving parts are arranged opposite to each other on the support base; the support base is provided with a U-shaped groove, and the groove is located between the two first driving parts.

4. The friction stir welding device for super-large metal rings according to claim 3, characterized in that: The first driving part includes a driving roller and a first motor; the first motor is fixed to the support base, and the driving end of the first motor is drivingly connected to the driving roller; the first motor drives the driving roller to rotate, thereby driving the metal ring to rotate.

5. The friction stir welding device for super-large metal rings according to claim 1, characterized in that: The welding assembly further includes two second rotating wheels, which are relatively arranged on both sides of the core material to limit the position of the core material.

6. The friction stir welding device for super-large metal rings according to claim 1, characterized in that: The flattening part includes a flattening wheel, which is fixedly connected to the support rod through a telescopic member and is used to flatten the weld seam of the metal ring.

7. A method for friction stir welding of oversized metal rings, characterized in that: A method for using the friction stir welding device for an oversized metal ring according to any one of claims 1 to 6, the method comprising: S1, align the metal ring between the driving rollers on both sides of the support base, and ensure that the core material extends into the V-shaped groove of the metal ring; S2, turn on the air blow gun, and the shielding gas blown out by the air blow gun protects the welded seam; S3, turning on the first motor and the second motor; so that one end of the core material contacts the V-groove of the metal ring while rotating, and mutual friction generates heat; the core material is continuously consumed due to friction, and the telescopic cylinder ensures that the core material moves in an orderly manner along a predetermined trajectory into the V-groove of the metal ring, closely contacts the V-groove of the metal ring, and continuously fills the weld; the flattening wheel flattens the welded seam to ensure welding quality; the metal ring rotates to achieve welding of the entire annular seam; S4, when the end of the core material away from the metal ring is close to the second driving gear, the material is loaded to achieve uninterrupted welding.

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