CN114932385A - Friction stir welding device and method for removing flash - Google Patents

Abstract

The invention discloses a friction stir welding device and method for removing flash, comprising a worktable, a first support plate is fixedly connected to the middle of the top of the worktable, processing parts are arranged on the first support plate, and a fixing mechanism is arranged on the worktable , the fixing mechanism is correspondingly arranged with the first support plate, the processing parts are arranged correspondingly with the fixing mechanism, the two sides of the worktable are provided with chute, the chute is provided with a support frame and a moving mechanism, and the support frame is slidably connected with the chute through the moving mechanism, A friction stir mechanism is arranged on the support frame, the friction stir mechanism is located above the processing part, and a flash removal mechanism is arranged on the friction stir mechanism, and both the friction stir mechanism and the flash removal mechanism are arranged corresponding to the processing parts. The invention realizes the stir welding of the processed parts, eliminates the flash generated in the friction stir welding process by grinding, and forms by one-time welding, avoids the second grinding in the later stage, is suitable for automatic welding processing, and improves the welding efficiency.

Description

A friction stir welding device and method for removing flash

technical field

The invention relates to the technical field of insect testing, in particular to a friction stir welding device and method for removing burrs.

Background technique

Friction welding refers to the use of thermoplastic to apply a certain axial pressure on the welding end faces of the two weldments, and make the contact surface make a violent friction movement, and the heat generated by the friction quickly stops the movement when the contact surface is heated to a certain welding temperature. , and apply a certain amount of upsetting pressure to produce a certain amount of plastic deformation of the two weldments, so that the two weldments are firmly welded together.

The friction stir welding method is the same as the conventional friction welding method, which also uses friction heat and plastic deformation heat as the welding heat source. High-speed rotation makes it rub against the welding workpiece material, so that the temperature of the material at the connection part increases and softens, and at the same time, the material is subjected to friction stir to complete the welding.

In the process of friction stir welding, the heat generated by the high-speed rotating stirring needle and the friction between the shaft shoulder and the workpiece makes the material to be welded locally plasticized. When the shaft shoulder moves forward along the welding interface, due to the excessive welding pressure. , extruded more plastic material from both sides of the shoulder, and formed flash defects on the surface of the weld after cooling. In the prior art, after welding is completed, manual grinding by workers or additional grinding equipment is required to remove flash, which requires a large amount of labor, increases processing costs, is not conducive to automated production, and leads to low efficiency. Therefore, there is an urgent need for a friction stir welding device and method for removing burrs to solve the above problems.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a friction stir welding device and method for removing burrs, so as to solve the above-mentioned problems in the prior art.

In order to achieve the above purpose, the present invention provides the following solutions: the present invention provides a friction stir welding device for removing flash, including a workbench, and a first support plate is fixedly connected to the middle of the top of the workbench, and the first support plate A machining part is arranged on it, a fixing mechanism is arranged on the worktable, the fixing mechanism is correspondingly arranged with the first support plate, the machining part is arranged correspondingly with the fixing mechanism, and two sides of the table are provided with A chute, a support frame and a moving mechanism are arranged in the chute, the support frame is slidably connected to the chute through the moving mechanism, a friction stir mechanism is provided on the support frame, and the friction stir mechanism is located at Above the machined parts, the friction stir mechanism is provided with a burr removing mechanism, and both the friction stir mechanism and the burr removal mechanism are arranged corresponding to the machined parts.

Preferably, the friction stir mechanism includes a three-axis moving table fixedly connected to the support frame, a support seat is fixedly connected to the three-axis moving table, and a clamping seat is rotatably connected to the bottom end of the support seat, so the The bottom end of the clamping seat is fixedly connected with a rotating head, the middle of the bottom end of the rotating head is provided with a stirring head, the stirring head is arranged corresponding to the processing part, and the friction stirring mechanism is located on the rotating head, and is connected with the rotating head. The stirring heads are arranged correspondingly, a transmission box is arranged at the top end of the support base, and the clamping base is in driving connection with the transmission box.

Preferably, several fixing blocks are fixedly connected to the outer side wall of the rotating head at equal intervals in the circumferential direction, the friction stir mechanism includes a connecting rod whose one end is fixedly connected to the fixing block, and the bottom end of the connecting rod is detachably connected There is a milling cutter head, and the bottom end of the milling cutter head and the bottom end of the rotating head are located on the same plane.

Preferably, the cutter head directions of several of the milling cutter heads are arranged in a clockwise direction.

Preferably, a first motor is fixedly connected in the rotating head, a gear is fixedly connected to the output shaft of the first motor, a connecting ring is rotatably connected in the rotating head, and an outer side wall of the connecting ring is fixedly connected with a gear. an annular toothed plate, the gear is engaged with the annular toothed plate, the top end of the stirring head extends into the rotating head, and is threadedly connected with the inner wall of the connecting ring.

Preferably, the fixing mechanism includes two bidirectional threaded rods rotatably connected to the top of the worktable, the two bidirectional threaded rods are arranged in parallel, and both ends of the bidirectional threaded rod are threadedly connected with a second support plate, and the first The bottom ends of the two support plates are in sliding contact with the top of the worktable, the bidirectional threaded rods penetrate through the first support plate, the two second support plates are respectively located on both sides of the first support plate, and the second The top end of the support plate and the top end of the first support plate are located on the same plane, the top end of the worktable is fixedly connected with a second motor, the output shaft of the second motor is fixedly connected with a first sprocket, and the two bidirectional threaded rods are fixedly connected. A second sprocket is fixedly connected to the top, the first sprocket is located between the two second sprockets, and both the second sprockets are connected to the first sprocket through a chain drive.

Preferably, support rods are fixedly connected to both ends of one side of the second support plate away from the first support plate, a limit plate is provided at the top of the support rod, and the top of the support rod and the limit plate are Both are provided with threaded holes, and the threaded holes are threadedly connected with bolts.

Preferably, the moving mechanism includes a hydraulic cylinder fixedly connected in the chute, and the hydraulic cylinder is fixedly connected to the support frame.

Preferably, an annular protective cover is fixedly connected to the outer side wall of the clamping seat.

A friction stir welding method for removing flash, comprising the following steps:

a. Place the parts to be processed: place the processed parts on the first support plate, and limit the position through the fixing mechanism;

b. Welding the workpiece to be processed: welding the processed parts through the friction stir mechanism;

c. Carry out flash processing: during the processing of the processed parts in step b, the flash removal mechanism removes the flash on the processed parts;

d. Completing the welding operation: After the welding of the processed parts is completed, they are removed from the first support plate.

The present invention discloses the following technical effects:

1. The present invention discloses a friction stir welding device and method for removing burrs. By setting a first support plate and a fixing mechanism, the limit support for different processing parts is realized, and the rigid fixing of the processing parts during the welding process is ensured. So as to ensure the welding effect of the processed parts.

2. The present invention discloses a friction stir welding device and method for removing burrs. By arranging a burr removing mechanism on the friction stir mechanism, the stir welding of machined parts is realized, and milling eliminates the process of friction stir welding. The generated flash is formed by one-time welding, which avoids the secondary grinding in the later stage, and is suitable for automatic welding processing, which improves the welding efficiency and ensures the welding effect.

3. The present invention discloses a friction stir welding device and method for removing burrs. Through the provided connecting ring, the stirring head can be recovered when the welding is completed, so as to avoid the occurrence of key holes at the end of the processed parts, and no secondary repair is required. , and further improve the welding efficiency.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some of the present invention. In the embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative labor.

Fig. 1 is the front structure schematic diagram of the device of the present invention;

Fig. 2 is a partial enlarged view at A in Fig. 1 of the present invention;

3 is a schematic diagram of the top surface structure of the device of the present invention;

FIG. 4 is a schematic view of the top surface structure of the connecting ring of the present invention;

Among them, 1. worktable; 2. first support plate; 3. machining parts; 4. chute; 5. support frame; 6. three-axis moving table; 7. support seat; 8. clamping seat; 9. rotation head; 10, stirring head; 11, transmission box; 12, fixed block; 13, connecting rod; 14, milling cutter head; 15, first motor; 16, gear; 17, connecting ring; 18, annular tooth plate; 19, two-way threaded rod; 20, second support plate; 21, second motor; 22, first sprocket; 23, second sprocket; 24, support rod; 25, limit plate; 26, bolt; 27, Hydraulic cylinder; 28. Ring protective cover.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

The present invention provides a friction stir welding device for removing flash, comprising a workbench 1, a first support plate 2 is fixedly connected to the middle of the top of the workbench 1, a machining part 3 is arranged on the first support plate 2, and a workbench 1 is arranged on There is a fixing mechanism, the fixing mechanism is arranged corresponding to the first support plate 2, the processing part 3 is arranged correspondingly to the fixing mechanism, and there are chute 4 on both sides of the worktable 1, and the chute 4 is provided with a supporting frame 5 and a moving mechanism. 5 is slidably connected with the chute 4 through the moving mechanism, the support frame 5 is provided with a friction stir mechanism, the friction stir mechanism is located above the processing part 3, and a flash removal mechanism is provided on the friction stir mechanism, and both the friction stir mechanism and the flash removal mechanism are installed. Set corresponding to machining part 3.

To further optimize the scheme, in order to realize the friction stir welding of the processed parts 3, the friction stir mechanism includes a three-axis moving table 6 fixedly connected to the support frame 5, and a support seat 7 is fixedly connected to the three-axis moving table 6, and the bottom of the support seat 7 is The end is rotatably connected with a clamping seat 8, the bottom end of the clamping seat 8 is fixedly connected with a rotating head 9, a stirring head 10 is arranged in the middle of the bottom end of the rotating head 9, and the stirring head 10 is arranged corresponding to the processing part 3, and the friction stirring mechanism is located in the rotating head. 9, and corresponding to the stirring head 10, the top of the support base 7 is provided with a transmission case 11, and the clamping base 8 is connected to the transmission case 11 by transmission.

To further optimize the scheme, in order to realize the removal of flash, a number of fixed blocks 12 are fixedly connected on the outer side wall of the rotating head 9 at equal intervals in the circumferential direction, and the friction stir mechanism includes a connecting rod 13 with one end fixedly connected to the fixed block 12. The connecting rod The bottom end of 13 is detachably connected with a milling cutter head 14. The bottom end of the milling cutter head 14 and the bottom end of the rotary head 9 are located on the same plane. edge to clear.

In order to further optimize the solution, in order to ensure the effect of removing burrs, the direction of the heads of several milling cutter heads 14 is arranged in a clockwise direction.

In order to further optimize the solution, in order to realize the shrinkage of the stirring head 10 and avoid the occurrence of key holes at the end of the processing part, a first motor 15 is fixedly connected to the rotating head 9, and a gear 16 is fixedly connected to the output shaft of the first motor 15. The rotating head A connecting ring 17 is rotatably connected inside 9, an annular toothed plate 18 is fixedly connected to the outer side wall of the connecting ring 17, the gear 16 is engaged with the annular toothed plate 18, the top of the stirring head 10 extends into the rotating head 9, and is threaded with the inner wall of the connecting ring 17. The first motor 15 drives the gear 16 to rotate, the gear 16 drives the connecting ring 17 to rotate, and the connecting ring 17 drives the screw-connected stirring head 10 to rotate, so as to realize the recovery of the stirring head 10 .

To further optimize the solution, in order to make the device suitable for processing parts of different sizes, the fixing mechanism includes two bidirectional threaded rods 19 that are rotatably connected to the top of the table 1, the two bidirectional threaded rods 19 are arranged in parallel, and both ends of the bidirectional threaded rod 19 are threadedly connected with a second threaded rod. Two supporting plates 20 , the bottom end of the second supporting plate 20 is in sliding contact with the top end of the workbench 1 , the bidirectional threaded rod 19 penetrates the first supporting plate 2 , the two second supporting plates 20 are respectively located on both sides of the first supporting plate 2 , and the second supporting plate 20 is The top end of the support plate 20 and the top end of the first support plate 2 are located on the same plane, the top end of the worktable 1 is fixedly connected with a second motor 21 , the output shaft of the second motor 21 is fixedly connected with a first sprocket 22 , and the two bidirectional threaded rods 19 are fixedly connected. Both are fixedly connected with a second sprocket 23 , the first sprocket 22 is located between the two second sprockets 23 , and the two second sprockets 23 are both connected to the first sprocket 22 through chains and driven by the second motor 21 . The first sprocket 22 rotates, the first sprocket 22 drives the two second sprockets 23 to rotate, the second sprocket 23 drives the bidirectional threaded rod 19 to rotate, and the bidirectional threaded rod 19 rotates to drive the threaded second support plate 20 to move, so that the The parts to be welded of the two processed parts 3 are butted together, and at the same time, it is ensured that the butt joint of the processed parts 3 is located at the top of the first support plate 2 , which ensures the rigid fixation of the processed parts 3 during the welding process.

In order to further optimize the solution, in order to limit the position of the processing part 3 and avoid the movement of the processing part 3 during the welding process, the two ends of the side of the second support plate 20 away from the first support plate 2 are fixedly connected with support rods 24. The support rods 24 The top end is provided with a limit plate 25 , the top end of the support rod 24 and the limit plate 25 are both provided with threaded holes, and bolts 26 are threaded in the threaded holes.

To further optimize the scheme, in order to realize the welding of the joints of the two processing parts 3, the moving mechanism includes a hydraulic cylinder 27 fixedly connected in the chute 4, the hydraulic cylinder 27 is fixedly connected with the support frame 5, and the support frame 5 is controlled by the hydraulic cylinder 27. Move slowly to finish welding the seam.

In order to further optimize the solution, in order to avoid the splash of parts residue during the process of de-flashing, an annular protective cover 28 is fixedly connected to the outer side wall of the clamping seat 8, and the annular protective cover 28 is used to block the part residues cut by the milling cutter head 14 to avoid Injury to surrounding operators.

A friction stir welding method for removing flash, comprising the following steps:

a. Placing the workpiece to be processed: the processing part 3 is two pieces of plate-type processing material, the two processing parts 3 are placed on the two second support plates 20 respectively, and the processing part 3 is limited to the second support by screwing the bolt 26 Between the plate 20 and the limit plate 25, the two bidirectional threaded rods 19 are driven to rotate by the second motor 21 at the same time, so that the second support plate 20 moves in the direction of the first support plate 2, so that the welding parts of the two processed parts 3 are butted. , the butt welding seam is located at the top of the first support plate 2, which ensures the rigidity of the processing part 3 during the welding process;

b. Welding the workpiece to be processed: drive the clamping seat 8 to rotate through the transmission box 11, when the clamping seat 8 rotates, it drives the rotating head 9 and the stirring head 10 to rotate, and the stirring head 10 is in contact with the welding part of the two processing parts 3. Friction stir welding of two machined parts 3;

c. Carry out flash processing: in step b, the milling cutter head 14 makes a circular motion during the welding process, and the flash generated during the welding process is removed by grinding the milling cutter head 14;

d. Completion of the welding operation: after the welding is completed, the processed part 3 after the welding is removed by turning the bolt 26 to contact the limit of the processed part 3 .

The present invention provides a friction stir welding device and method for removing burrs. When in use, the machining parts 3 are two plates, and the two machining parts 3 are placed on the two second support plates 20 respectively, and by screwing The bolts 26 limit the processed parts on the second support plate 20, the second motor 21 drives the first sprocket 22 to rotate, the first sprocket 22 drives the two second sprockets 23 to rotate, and the second sprocket 23 drives the two-way thread The rotation of the rod 19, the rotation of the bidirectional threaded rod 19 drives the movement of the second support plate 20 which is threadedly connected, so that the parts of the two processing parts 3 that need to be welded are butted. 8 When rotating, the rotating head 9 and the stirring head 10 are driven to rotate, and the stirring head 10 is in rotational contact with the welding place of the two processing parts 3 to complete the friction stir welding of the two processing parts 3. During the welding process, the milling cutter head 14 makes a circle Movement, the flash generated during the welding process is polished and removed by the milling cutter head 14, and the hydraulic cylinder 27 drives the support frame 5 to move to complete the friction welding of the butt joints of the two processing parts 3. When the welding is completed, the first motor 15 drives the The gear 16 rotates, the gear 16 drives the connecting ring 17 to rotate, and the replacement stirring head 10 is received into the rotating head 9 to avoid forming a key hole at the end of the welding seam.

The invention provides a friction stir welding device and method for removing burrs, which realizes the stir welding of processed parts, eliminates the burrs generated in the friction stir welding process by milling, and forms by one-time welding, avoiding the secondary grinding in the later stage. , It is suitable for automatic welding processing, which improves the welding efficiency and ensures the welding effect. At the same time, it avoids the occurrence of key holes at the end of the processed parts, and does not need to be repaired twice, which further improves the welding efficiency and is suitable for automated production.

In the description of the present invention, it should be understood that the terms "portrait", "horizontal", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or It is implied that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

The above-mentioned embodiments are only to describe the preferred modes of the present invention, but not to limit the scope of the present invention. Without departing from the design spirit of the present invention, those of ordinary skill in the art can make various modifications to the technical solutions of the present invention. Variations and improvements should fall within the protection scope determined by the claims of the present invention.

Claims (10)

1. A friction stir welding device for removing flash, characterized in that it comprises a workbench (1), and a first support plate (2) is fixedly connected to the top middle of the workbench (1), and the first support plate (2) A machining part (3) is arranged on it, a fixing mechanism is arranged on the worktable (1), the fixing mechanism is arranged corresponding to the first support plate (2), and the machining part (3) is connected to The fixing mechanisms are correspondingly arranged, and sliding grooves (4) are provided on both sides of the worktable (1), and a supporting frame (5) and a moving mechanism are arranged in the sliding grooves (4), and the supporting frame (5) The moving mechanism is slidably connected to the chute (4), the support frame (5) is provided with a friction stir mechanism, the friction stir mechanism is located above the processing part (3), and the friction stir mechanism A burr removing mechanism is provided on the upper part, and both the friction stir mechanism and the burr removing mechanism are arranged corresponding to the processing part (3). 2. The friction stir welding device for removing burrs according to claim 1, wherein the friction stir mechanism comprises a three-axis moving table (6) fixedly connected to the support frame (5), The three-axis moving table (6) is fixedly connected with a support seat (7), the bottom end of the support seat (7) is rotatably connected with a clamping seat (8), and the bottom end of the clamping seat (8) is fixedly connected There is a rotating head (9), a stirring head (10) is arranged in the middle of the bottom end of the rotating head (9), the stirring head (10) is arranged corresponding to the processing part (3), and the friction stirring mechanism is located at the The rotating head (9) is arranged corresponding to the stirring head (10). 11) Transmission connection. 3. A friction stir welding device for removing burrs according to claim 2, characterized in that: a plurality of fixing blocks (12) are fixedly connected at equal intervals in the circumferential direction on the outer side wall of the rotating head (9), so The friction stir mechanism includes a connecting rod (13) whose one end is fixedly connected to the fixing block (12), and a milling cutter head (14) is detachably connected to the bottom end of the connecting rod (13). The bottom end of the head (14) and the bottom end of the rotating head (9) are located on the same plane. 4 . The friction stir welding device for removing burrs according to claim 3 , wherein the cutter heads of the plurality of milling cutter heads ( 14 ) are arranged in a clockwise direction. 5 . 5 . The friction stir welding device for removing flash according to claim 2 , wherein a first motor ( 15 ) is fixedly connected in the rotating head ( 9 ), and the first motor ( 15 ) A gear (16) is fixedly connected to the output shaft of the rotary head (9), a connecting ring (17) is rotatably connected to the inside of the rotating head (9), and an annular tooth plate (18) is fixedly connected to the outer side wall of the connecting ring (17). The gear (16) meshes with the annular tooth plate (18), and the top end of the stirring head (10) extends into the rotating head (9) and is threadedly connected to the inner wall of the connecting ring (17). 6 . The friction stir welding device for removing flash according to claim 1 , wherein the fixing mechanism comprises two bidirectional threaded rods ( 19 ) rotatably connected to the top of the workbench ( 1 ). 6 . The two-way threaded rod (19) is arranged in parallel, and both ends of the two-way threaded rod (19) are threadedly connected with a second support plate (20), and the bottom end of the second support plate (20) is connected to the workbench ( 1) The top ends are in sliding contact, the bidirectional threaded rod (19) penetrates the first support plate (2), and the two second support plates (20) are respectively located on both sides of the first support plate (2), and The top end of the second support plate (20) and the top end of the first support plate (2) are located on the same plane, the top end of the worktable (1) is fixedly connected with a second motor (21), and the second motor (21) A first sprocket (22) is fixedly connected to the output shaft of ), and a second sprocket (23) is fixedly connected to the two bidirectional threaded rods (19). between the second sprockets (23), and both of the second sprockets (23) are connected to the first sprocket (22) in a driving manner through a chain. 7 . The friction stir welding device for removing flash according to claim 6 , wherein both ends of the second support plate ( 20 ) away from the first support plate ( 2 ) are fixed at both ends. 8 . A support rod (24) is connected, the top of the support rod (24) is provided with a limit plate (25), the top of the support rod (24) and the limit plate (25) are both provided with threaded holes, the A bolt (26) is threaded in the threaded hole. 8 . The friction stir welding device for removing flash according to claim 1 , wherein the moving mechanism comprises a hydraulic cylinder ( 27 ) fixedly connected in the chute ( 4 ), and the hydraulic The cylinder (27) is fixedly connected with the support frame (5). 9 . The friction stir welding device for removing burrs according to claim 2 , wherein an annular protective cover ( 28 ) is fixedly connected to the outer side wall of the clamping seat ( 8 ). 10 . 10. A friction stir welding method for removing burrs, the method is suitable for a friction stir welding device for removing burrs according to claim 1, characterized in that: comprising the following steps: a. Place the part to be processed: place the processed part (3) on the first support plate (2), and limit the position through the fixing mechanism; b. Welding the workpiece to be processed: welding the processing part (3) through the friction stir mechanism; c. Carry out burr processing: during the processing of the machined part (3) in step b, the burr removal mechanism removes the burr on the machined part (3); d. Completion of the welding operation: the processing part (3) is removed from the first support plate (2) after the welding is completed.

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