Friction welding clamp

Abstract

The utility model relates to a friction welding clamp, which belongs to the technical field of friction welding and comprises a mounting base, a supporting plate vertically arranged on the top surface of the mounting base, a first supporting block mounted on one side of the supporting plate and matched with a limiting block of a welding workpiece, a positioning assembly mounted on the supporting plate and a clamping mechanism used for pressing the welding workpiece; the first supporting block is provided with a supporting part and an abutting part connected to the side, back on to the supporting plate, of the supporting part. The abutting part is provided with a first abutting groove used for abutting of the first limiting part of the limiting block and a second abutting groove used for abutting of the second limiting part of the limiting block. The positioning assembly comprises a plurality of positioning columns which abut against and are matched with positioning grooves of the welding workpieces, and the clamping mechanism comprises clamping blocks which are arranged corresponding to the positioning columns and press the welding workpieces to the positioning columns and clamping driving pieces for driving the clamping blocks to act. The method has the effect of improving the welding precision of the welding workpiece of the large-area plane part.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of friction welding technology, in particular to a friction welding clamp. BACKGROUND

[0002] In the manufacturing industry, especially in the automotive industry, it is often necessary to weld large-area planar parts. The existing welding of planar parts usually adopts friction stir welding. Friction stir welding refers to the use of heat generated by the friction between a high-speed rotating welding tool and a workpiece to locally melt the welded material. When the welding tool moves forward along the welding interface, the plasticized material flows from the front to the rear 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. Therefore, in order to ensure the welding precision of the parts, the workpiece must be rigidly fixed during the welding process.

[0003] With reference to Figure 1 and Figure 2 The welding workpiece 9 is in the shape of a cuboid, and the welding workpiece 9 is provided with a mounting groove 91 and a positioning groove 92 on one side of the mounting groove 91. The welding workpiece 9 is provided with a limiting block 93 on the top surface and the bottom surface of the mounting groove 91, and the limiting block 93 on the top surface of the mounting groove 91 is arranged opposite to the limiting block 93 on the bottom surface of the mounting groove 91. The limiting block 93 has a first limiting portion 931 and a second limiting portion 932 connected to one side of the first limiting portion 931, and the width of the first limiting portion 931 is greater than the width of the second limiting portion 932. The top and bottom of the welding workpiece 9 has a welding portion 94, and the welding workpiece 9 is provided with a first groove body 941 on the welding portion 94.

[0004] Most of the existing friction welding clamps for the above-mentioned welding workpiece adopt horizontal position positioning and clamping mechanisms, which ensure that the welding workpiece is in a stable state by the cooperation of the bottom supporting surface and the two side pressing blocks. For the related technology in the above, the inventors believe that the welding precision of the above-mentioned friction welding clamp is not ideal. CONTENT OF THE UTILITY MODEL

[0005] In order to improve the welding precision of large-area planar parts, the present application provides a friction welding clamp.

[0006] The friction welding clamp provided by the present application adopts the following technical solution:

[0007] The friction welding clamp comprises a mounting base, a support plate vertically arranged on the top surface of the mounting base, a first support block mounted on one side of the support plate and matched with the limiting block of the welding workpiece, a positioning assembly mounted on the support plate, and a clamping mechanism for pressing the welding workpiece.

[0008] By adopting the technical scheme, in the welding process of the welding workpiece, the accurate placement of the welding workpiece on the friction welding clamp and the stable support of the welding workpiece are realized through the matching between the first support block and the limiting block, the positioning column is arranged opposite to the positioning groove of the welding workpiece, and then the action of the clamping block is driven by the clamping driving element, so that the welding workpiece is pressed on the positioning column, the abutting matching of the positioning column and the positioning groove support of the welding workpiece is realized, the welding workpiece is stably clamped on the friction welding clamp, the probability of movement of the welding workpiece in the welding process is reduced, and the welding precision of the welding workpiece is effectively ensured.

[0009] Optionally, the clamping driving element comprises a clamping cylinder mounted on the support plate and a hinge seat mounted on the clamping cylinder and used for hinging the clamping block, and the end of the clamping block away from the positioning assembly is hinged to the top of the piston rod of the clamping cylinder, and the hinge point of the hinge seat and the clamping block is located on the side of the hinge point of the clamping cylinder and the clamping block close to the positioning assembly.

[0010] By adopting the technical scheme, the specific structure of the clamping driving element is disclosed, in the clamping process of the welding workpiece, the piston rod of the clamping cylinder is pushed upward, and the clamping block is pressed downward due to the arrangement of the hinge seat, so that the welding workpiece is pressed on the positioning column. The arrangement of the hinge seat makes the clamping force more uniformly and stably act on the welding workpiece, effectively improves the clamping efficiency, and reduces the probability of workpiece deformation or damage caused by improper clamping.

[0011] Optionally, a limiting mechanism is further arranged on one side of the support plate, the limiting mechanism comprises a limiting cylinder mounted on the support plate and arranged on one side of the welding workpiece, and an abutting block arranged on the other side of the welding workpiece opposite to the limiting cylinder, and the piston rod of the limiting cylinder extends towards the abutting block.

[0012] By adopting the technical scheme, the specific structure of the limiting mechanism is disclosed, and the limiting mechanism is arranged to help further limit the welding workpiece arranged on the friction welding clamp. During the function implementation of the limiting mechanism, the piston rod of the limiting cylinder is pushed towards the abutting block, so that one side of the welding workpiece abuts against the piston rod of the limiting cylinder and the other side abuts against the abutting block, thereby further reducing the probability of movement of the welding workpiece during welding and effectively ensuring the welding precision of the welding workpiece.

[0013] Optionally, the abutting block is provided with a limiting groove on one side thereof facing the limiting cylinder, and the abutting block is provided with an abutting protrusion in the limiting groove.

[0014] By adopting the technical scheme, the abutting block is provided with a limiting groove on one side thereof facing the limiting cylinder, and the abutting block is provided with an abutting protrusion in the limiting groove. The limiting groove provides a stable mounting platform for mounting the abutting protrusion, thereby reducing the probability of deviation of the limiting protrusion during use. The abutting protrusion can further limit the welding workpiece by the abutting block, thereby reducing the probability of movement and deviation of the welding workpiece during welding and effectively ensuring the welding precision of the welding workpiece.

[0015] Optionally, at least two groups of the limiting mechanism are arranged on one side of the support plate along the height direction of the support plate.

[0016] By adopting the technical scheme, at least two groups of the limiting mechanism are arranged on one side of the support plate along the height direction of the support plate, so that the limiting mechanism can stably limit the welding workpiece at multiple positions, can adapt to the shapes of various welding workpieces and provide multi-level limiting support for the welding workpieces, effectively reduces the probability of movement and deviation of the welding workpiece during welding, and helps to improve the welding precision of the welding workpiece.

[0017] Optionally, the top surface of the support plate is further provided with a rotating and pressing mechanism, the rotating and pressing mechanism comprises a pressing rod abutting against the top surface of the welding workpiece and a driving assembly driving the pressing rod to act, the pressing rod has a first station and a second station after being driven by the driving assembly, when the pressing rod is in the first station, the pressing rod is arranged parallel to the support plate, and when the pressing rod is in the second station, the pressing rod is arranged perpendicular to the support plate and the bottom of the pressing rod abuts against the top surface of the welding workpiece.

[0018] By adopting the technical scheme, the specific structure of the rotating and pressing mechanism is disclosed, the rotating and pressing mechanism is arranged on the top surface of the support plate, when welding of the welding workpiece is needed, the driving assembly drives the pressing rod to be in the second position, so that the bottom of the pressing rod abuts against the welding part of the welding workpiece, the pressing rod realizes pressing of the welding workpiece, which helps to reduce the probability of movement of the welding workpiece in the welding process, and effectively improves the welding precision of the welding workpiece.

[0019] Optionally, the bottom surfaces of the two sides of the pressing rod are provided with pressing blocks, the side away from the pressing rod of the pressing block has a pressing part protruding away from the pressing rod, when the pressing rod is in the second position, the pressing part extends into the first groove body and the bottom surface of the pressing block abuts against the top surface of the welding workpiece.

[0020] By adopting the technical scheme, the bottom surfaces of the two sides of the pressing rod are provided with pressing blocks, and the side away from the pressing rod of the pressing block has a pressing part, when the pressing rod is in the second position, the pressing part of the pressing block extends to the first groove body of the welding workpiece and the bottom surface of the pressing block abuts against the top surface of the welding workpiece, which helps to further limit the welding workpiece, reduces the probability of movement of the welding workpiece in the welding process, and improves the welding precision of the welding workpiece.

[0021] Optionally, the support plate is further provided with a plurality of second support blocks for abutting against the welding workpiece, and the length of the second support block is equal to the length of the first support block, and at least four second support blocks are arranged on one side of the support plate.

[0022] By adopting the technical scheme, the arrangement of the second support block can provide stable support for the welding workpiece, reduce the probability of movement and deviation of the welding workpiece in the welding process. The arrangement of at least four second support blocks on one side of the support plate helps to disperse the pressure received by the welding workpiece in the clamping process, reduces the probability of damage of the welding process in the clamping process, and helps to reduce the scrap rate of the welding workpiece in the welding process.

[0023] Optionally, the two sides of the support plate are provided with the first support block, the positioning assembly and the clamping mechanism.

[0024] By adopting the technical scheme, the first support block, the positioning assembly and the clamping mechanism are arranged on the two sides of the support plate, so that the two sides of the support plate can clamp the welding workpiece, effectively improve the working efficiency of the friction welding clamp, and help to improve the space utilization of the friction welding clamp.

[0025] In summary, the present application has at least one of the following beneficial technical effects:

[0026] 1. A friction welding clamp, the preliminary positioning of the welding workpiece is realized through the cooperation between the first supporting block on the supporting plate and the limiting block on the welding workpiece, and the clamping block driven by the clamping driving element is used to press the welding workpiece, so as to realize the abutting cooperation between the positioning column and the positioning groove of the welding workpiece, which helps to reduce the probability of the welding workpiece from moving or deviating in the welding process, and guarantees the welding precision of the welding workpiece.

[0027] 2. The further limiting of the welding workpiece arranged on the friction welding clamp is realized through the setting of the limiting mechanism on the supporting plate, which further reduces the probability of the welding workpiece from moving in the welding process, and effectively guarantees the welding precision of the welding workpiece.

[0028] 3. The further limiting of the welding workpiece is realized through the setting of the rotating and pressing mechanism on the top surface of the supporting plate and the setting of the pressing blocks on the bottom surface of the pressing rod, which reduces the probability of the welding workpiece from moving in the welding process, and improves the welding precision of the welding workpiece. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a structural schematic view of the welding workpiece.

[0030] Figure 2 is a partial enlarged view of A in Figure 1

[0031] Figure 3 is a structural schematic view of the cooperation between the friction welding clamp and the welding workpiece in the embodiment of the application.

[0032] Figure 4 is a structural schematic view of the friction welding clamp in the embodiment of the application.

[0033] Figure 5 is a partial enlarged view of B in Figure 4

[0034] Figure 6 is a cross-sectional view of the cooperation between the positioning column and the supporting plate in the embodiment of the application.

[0035] Figure 7 is a structural schematic view of the clamping mechanism and the limiting mechanism in the embodiment of the application.

[0036] Figure 8 is a structural schematic view of the rotating and pressing mechanism in the embodiment of the application.

[0037] ​​Explanation of reference signs: 1, mounting base; 2, support plate; 21, arrangement groove; 22, trapezoidal groove; 3, first support block; 31, support part; 32, abutting part; 321, first abutting groove; 322, second abutting groove; 4, positioning assembly; 41, positioning column; 411, mounting part; 412, functional part; 413, connecting part; 42, adjustment washer; 5, clamping mechanism; 51, clamping block; 52, clamping driving piece; 521, clamping cylinder; 522, hinged seat; 6, limiting mechanism; 61, limiting cylinder; 62, abutting block; 621, limiting groove; 622, abutting protrusion; 7, rotary down-pressing mechanism; 71, down-pressing rod; 711, pressing block; 7111, pressing part; 72, driving assembly; 8, second support block; 9, welding workpiece; 91, mounting groove; 92, positioning groove; 93, limiting block; 931, first limiting part; 932, second limiting part; 94, welding part; 941, first groove body. DETAILED DESCRIPTION

[0038] The following will be described in detail below with reference to the accompanying drawings. Figures 1-8 The application is further described in detail.

[0039] The embodiments of the application disclose a friction welding clamp for clamping a welding workpiece of a large-area planar part.

[0040] Reference Figure 3 and Figure 4 A friction welding clamp comprises a mounting base 1, a support plate 2 vertically arranged on the top surface of the mounting base 1, a first support block 3 mounted on one side of the support plate 2 and used for cooperating with a limiting block 93 of a welding workpiece 9, a positioning assembly 4 mounted on the support plate 2, a clamping mechanism 5 used for pressing the welding workpiece 9, a limiting mechanism 6 mounted on the support plate 2, and a rotary down-pressing mechanism 7 mounted on the top surface of the support plate 2.

[0041] Reference Figure 4 and Figure 5 The first support block 3 is mounted on the end of the support plate 2 far away from the mounting base 1. The first support block 3 has a support part 31 mounted on the support plate 2 and an abutting part 32 connected to the side of the support part 31 away from the support plate 2. The abutting part 32 has a first abutting groove 321 for abutting a first limiting part 931 of the limiting block 93 of the welding workpiece 9 and a second abutting groove 322 for abutting a second limiting part 932 of the limiting block 93, so that the preliminary positioning of the welding workpiece 9 on the friction welding clamp is realized through the cooperation between the first support block 3 and the limiting block 93.

[0042] Reference Figure 4 and Figure 6The positioning assembly 4 comprises a plurality of positioning columns 41 abuttingly matched with the positioning grooves 92 of the welding workpiece 9, and the support plate 2 is provided with arrangement grooves 21 for arranging the positioning columns 41. The positioning column 41 comprises a mounting portion 411 in interference fit with the arrangement groove 21, a functional portion 412 abuttingly matched with the positioning groove 92 of the welding workpiece 9, and a connecting portion 413 connecting the functional portion 412 and the mounting portion 411. The outer diameter of the functional portion 412 is greater than that of the connecting portion 413, and the mounting portion 411 is further provided with a chamfer structure away from the connecting portion 413. The positioning column 41 is provided with an adjusting gasket 42 at the connecting portion 413, and one side of the adjusting gasket 42 abuts against the functional portion 412 and the other side abuts against the support plate 2.

[0043] With reference to Figure 4 and Figure 7 The clamping mechanism 5 comprises a clamping block 51 corresponding to the positioning column 41 and arranged for pressing the welding workpiece 9 against the positioning column 41, and a clamping drive 52 driving the clamping block 51 to act. The clamping block 51 is arranged opposite to the positioning column 41 away from the clamping drive 52. The clamping drive 52 comprises a clamping cylinder 521 mounted on the support plate 2 and a hinge seat 522 mounted on the clamping cylinder 521 and used for hingedly connecting the clamping block 51. The clamping block 51 is hingedly connected to the top of the piston rod of the clamping cylinder 521 away from the positioning column 41, and the hinge seat 522 and the hinge point of the clamping block 51 are located on the side close to the positioning column 41 among the hinge point of the clamping block 51 and the piston rod of the clamping cylinder 521. When the piston rod of the clamping cylinder 521 is pushed out in the direction away from the support plate 2, the clamping block 51 is pressed down to press the welding workpiece 9 against the positioning column 41. In this embodiment, the positioning assembly 4 comprises four positioning columns 41 abuttingly matched with the positioning grooves 92 of the welding workpiece 9, and the support plate 2 is provided with four groups of clamping mechanisms 5 corresponding to the positioning columns 41.

[0044] With reference to Figure 4 and Figure 7In order to further reduce the probability of the welding workpiece 9 from moving and deviating during the welding process, at least two groups of limiting mechanisms 6 are arranged on one side of the support plate 2 along the height direction of the support plate 2. The limiting mechanism 6 comprises a limiting cylinder 61 mounted on the support plate 2 and arranged on one side of the welding workpiece 9, and an abutting block 62 arranged on the other side of the welding workpiece 9 opposite to the limiting cylinder 61. The piston rod of the limiting cylinder 61 extends towards the abutting block 62, the abutting block 62 is provided with a limiting groove 621 on the side facing the limiting cylinder 61, and the abutting block 62 is provided with an abutting protrusion 622 in the limiting groove 621, and the abutting protrusion 622 and the abutting block 62 are fixed by screw connection. During the clamping process of the welding workpiece 9, the piston rod of the limiting cylinder 61 extends towards the abutting block 62, so that one side of the welding workpiece 9 abuts against the piston rod of the limiting cylinder 61 and the other end abuts against the abutting block 62, thereby limiting the welding workpiece 9 and reducing the probability of the welding workpiece 9 from moving. In this embodiment, two groups of limiting mechanisms 6 are arranged on one side of the support plate 2 along the height direction of the support plate 2, which helps to realize multi-position stable limiting of the welding workpiece 9, and makes the friction welding clamp adapt to the shapes of various welding workpieces 9 and provide multi-level limiting support for the welding workpieces 9.

[0045] With reference to Figure 8 A trapezoidal groove 22 is formed on the top surface of the support plate 2, and the rotating and pressing mechanism 7 is arranged at the bottom of the trapezoidal groove 22. The rotating and pressing mechanism 7 comprises a pressing rod 71 abutting against the top surface of the welding workpiece 9 and a driving assembly 72 driving the pressing rod 71 to act. The pressing rod 71 driven by the driving assembly 72 has a first station and a second station. When the pressing rod 71 is in the first station, the pressing rod 71 is arranged in parallel with the extension direction of the support plate 2; when the pressing rod 71 is in the second station, the pressing rod 71 is arranged perpendicular to the extension direction of the support plate 2 and the bottom of the pressing rod 71 abuts against the top surface of the welding workpiece 9. In order to further limit the welding workpiece 9, the bottom surface of the pressing rod 71 is provided with a pressing block 711 symmetrically arranged on both sides. The side of the pressing block 711 away from the pressing rod 71 has a pressing portion 7111 protruding away from the pressing rod 71. When the driving assembly 72 drives the pressing rod 71 to be in the second station, the pressing portion 7111 of the pressing block 711 extends into the first groove body 941 of the welding workpiece 9, and the bottom surface of the pressing block 711 abuts against the top surface of the welding workpiece 9.

[0046] With reference to Figure 4In order to improve the stability of the welding workpiece 9 on the friction welding clamp, and reduce the probability of damage of the welding workpiece 9 in the welding process, a plurality of second supporting blocks 8 for abutting the welding workpiece 9 are arranged on the supporting plate 2, and the length of the second supporting block 8 is equal to the length of the first supporting block 3. At least four second supporting blocks 8 are arranged on one side of the supporting plate 2, so that the stress of the welding workpiece 9 during clamping can be more uniform. In this embodiment, five second supporting blocks 8 are arranged on one side of the supporting plate 2.

[0047] With reference to Figure 3 and Figure 4 In order to improve the working efficiency of the friction welding clamp, the first supporting block 3, the positioning assembly 4, the clamping mechanism 5 matched with the positioning assembly 4, the limiting assembly and the second supporting block 8 are arranged on both sides of the supporting plate 2.

[0048] The implementation principle of the friction welding clamp in the embodiment of the application is as follows: in the clamping process of the welding workpiece 9, the preliminary positioning of the welding workpiece 9 on the friction welding clamp is realized through the cooperation between the limiting block 93 on the welding workpiece 9 and the first supporting block 3, the preliminary fixation of the welding workpiece 9 is realized through the cooperation between the limiting cylinder 61 and the abutting block 62, the welding workpiece 9 is pressed on the positioning column 41 by the clamping cylinder 521 driving the clamping block 51, the abutting cooperation between the positioning column 41 and the positioning groove 92 of the welding workpiece 9 is realized, and thus the clamping process of the welding workpiece 9 on the friction welding clamp is completed. The probability of movement or deviation of the welding workpiece 9 in the welding process is effectively reduced, and the welding precision of the welding workpiece 9 is ensured.

[0049] The above are the preferred embodiments of the application, and do not limit the protection scope of the application. Therefore, equivalent changes made on the basis of the structure, shape and principle of the application should be covered within the protection scope of the application.

Claims

1. A friction welding fixture, characterized by, The device comprises a mounting base (1), a support plate (2) vertically arranged on the top surface of the mounting base (1), a first support block (3) mounted on one side of the support plate (2) and matched with the limiting block (93) of the welding workpiece (9), a positioning assembly (4) mounted on the support plate (2), and a clamping mechanism (5) for pressing the welding workpiece (9). The first support block (3) has a support part (31) and an abutting part (32) connected to the side of the support part (31) away from the support plate (2), the abutting part (32) has a first abutting groove (321) for the first limiting part (931) of the limiting block (93) to abut and a second abutting groove (322) for the second limiting part (932) of the limiting block (93) to abut. The positioning assembly (4) comprises a plurality of positioning columns (41) matched with the positioning groove (92) of the welding workpiece (9), and the clamping mechanism (5) comprises a clamping block (51) arranged corresponding to the positioning column (41) and pressing the welding workpiece (9) to the positioning column (41), and a clamping driving part (52) driving the clamping block (51) to act.

2. A friction welding fixture according to claim 1, wherein The clamping driving part (52) comprises a clamping cylinder (521) mounted on the support plate (2) and a hinge seat (522) mounted on the clamping cylinder (521) and used for the hinge of the clamping block (51), one end of the clamping block (51) away from the positioning assembly (4) is hinged to the top of the piston rod of the clamping cylinder (521), and the hinge point of the hinge seat (522) and the clamping block (51) is located on the side of the hinge point of the clamping cylinder (521) and the clamping block (51) close to the positioning assembly (4).

3. A friction welding fixture according to claim 1, wherein The side of the support plate (2) is further provided with a limiting mechanism (6), the limiting mechanism (6) comprises a limiting cylinder (61) mounted on the support plate (2) and arranged on one side of the welding workpiece (9), and an abutting block (62) arranged on the other side of the welding workpiece (9) opposite to the limiting cylinder (61), the piston rod of the limiting cylinder (61) extends towards the abutting block (62).

4. A friction welding fixture according to claim 3, wherein The side of the abutting block (62) towards the limiting cylinder (61) is provided with a limiting groove (621), and the abutting block (62) is provided with an abutting protrusion (622) in the limiting groove (621).

5. A friction welding fixture according to claim 3, wherein At least two groups of the limiting mechanism (6) are arranged on the side of the support plate (2) along the height direction of the support plate (2).

6. A friction welding fixture according to claim 1, wherein The top surface of the support plate (2) is further provided with a rotary pressing mechanism (7), which comprises a pressing rod (71) abutting against the top surface of the welding workpiece (9) and a driving assembly (72) driving the pressing rod (71) to act, the pressing rod (71) driven by the driving assembly (72) has a first station and a second station, when the pressing rod (71) is in the first station, the pressing rod (71) is arranged in parallel to the support plate (2), when the pressing rod (71) is in the second station, the pressing rod (71) is arranged vertically to the support plate (2) and the bottom of the pressing rod (71) abuts against the top surface of the welding workpiece (9).

7. A friction welding fixture according to claim 6, wherein The bottom surface of the pressing rod (71) is provided with a pressing block (711), the side of the pressing block (711) away from the pressing rod (71) has a pressing part (7111) protruding away from the pressing rod (71), when the pressing rod (71) is in the second station, the pressing part (7111) extends into the first groove body (941) and the bottom surface of the pressing block (711) abuts against the top surface of the welding workpiece (9).

8. A friction welding fixture according to claim 1, wherein The support plate (2) is further provided with a plurality of second support blocks (8) for abutting against the welding workpiece (9), the length of the second support block (8) is equal to the length of the first support block (3), at least four second support blocks (8) are arranged on one side of the support plate (2).

9. A friction welding fixture according to claim 1, wherein The two sides of the support plate (2) are provided with the first support block (3), the positioning assembly (4) and the clamping mechanism (5).

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