Friction stir welding fixing clamp

Abstract

The utility model discloses a stationary fixture for friction stir welding, which is used for fixing a welding area of a terminal and a flat belt so as to carry out friction stir welding, and comprises an operation table board, and a terminal fixing component and a flat belt pressing component which are arranged on the operation table board, the terminal fixing component comprises a terminal fixing piece and a cover plate, the terminal fixing piece comprises a welding area, and the flat belt pressing component is arranged on the operation table board. The cover plate can be arranged on the welding area in a pressing manner so as to clamp and fix the first welding area of the terminal; the bandlet pressing assembly is used for fixing the bandlet; the flat belt is provided with a second welding area; the second welding area is inserted into the welding area, so that the first welding area and the second welding area abut against each other to form a welding position; a welding window is formed in the cover plate, the welding position is exposed out of the welding window, and a stirring needle for friction stir welding conducts welding on the welding position through the welding window. According to the scheme, through the fixing clamp for friction stir welding, the terminal and the bandlet are in a fixed state, and the situation that the terminal and the bandlet move relatively in the friction stir welding process, and the welding quality is affected is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of welding equipment, and more specifically, to a fixing fixture for friction stir welding. Background Art

[0002] In recent years, the wiring harness industry has developed rapidly. New energy vehicles require fast charging to save users time. Therefore, the wiring harness industry uses large-square wires or large-square bars. At the same time, automobiles are also pursuing extreme lightweighting, using large-square aluminum wires and large-square aluminum bars. Friction stir welding technology has rapidly developed in my country. Its advantages, such as high welding strength, smooth weld surface, and ease of automated processing, have led to its widespread adoption in industrial manufacturing. However, when using friction stir welding to weld wires and terminals, a notch is formed at the start of the weld, where the terminal and the bar are disconnected, and a keyhole is formed at the end of the weld.

[0003] Therefore, how to provide a fixing clamp for stir friction welding to effectively avoid notches and keyholes generated during the process of stir friction welding terminals and row-type wires has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0004] One purpose of the utility model is to provide a new technical solution for a fixing fixture of friction stir welding.

[0005] According to a first aspect of the present invention, a fixing fixture for friction stir welding is provided, which is used to fix the welding area of ​​a terminal and a flat strip for friction stir welding. The fixture comprises an operating table, a terminal fixing assembly and a flat strip pressing assembly arranged on the operating table, wherein the terminal fixing assembly comprises a terminal fixing member and a cover plate, the terminal fixing member comprises a welding area, and the cover plate can be pressed against the welding area to clamp and fix the first welding area of ​​the terminal;

[0006] The flat belt pressing assembly is used to fix the flat belt; the flat belt has a second welding area; the second welding area is inserted into the welding area so that the first welding area and the second welding area are relatively abutted to form a weld;

[0007] A welding window is provided on the cover plate, wherein the welding portion is exposed through the welding window, and a stirring needle of the friction stir welding welds the welding portion through the welding window.

[0008] Optionally, the terminal fixing member includes a first bottom wall and a side wall protruding from the first bottom wall, the first side wall forming a terminal profiling groove around at least a portion of the outer periphery of the terminal, and the terminal profiling groove has a blocking portion for limiting the terminal from moving away from the welding position;

[0009] The first bottom wall protrudes outward to form the welding area.

[0010] Optionally, two auxiliary materials are placed against both sides of the welding point for assisting welding of the welding point. The terminal fixing assembly also includes auxiliary material fixing parts arranged on the operating table and located on both sides of the welding point. The two auxiliary materials are simultaneously pressed and arranged between the cover plate and the auxiliary material fixing parts. The welding window also reveals at least part of the auxiliary materials. The stirring needle rotates to penetrate one auxiliary material and then enters the other auxiliary material through the welding point.

[0011] Optionally, the top of each auxiliary material fixing piece is recessed downward to form an auxiliary material contoured groove communicating with the welding area.

[0012] Optionally, the terminal fixing assembly further includes two auxiliary material fixing cylinders arranged on the operating table, and the output end of each auxiliary material fixing cylinder is connected to an auxiliary material fixing piece to drive the auxiliary material fixing piece to move closer to or away from the terminal fixing piece.

[0013] Optionally, the auxiliary material profiling groove has a first side opening facing the welding position, and the auxiliary material profiling groove is connected to the welding area via the first side opening.

[0014] Optionally, the side surface of the auxiliary material profiling groove further has a second side opening facing parallel to the extending direction of the flat belt;

[0015] The terminal fixing assembly also includes an auxiliary material side cylinder, and an auxiliary material clamping piece is provided at the output end of the auxiliary material side cylinder. The auxiliary material clamping piece is used to block the second side opening and clamp and fix the auxiliary material.

[0016] Optionally, the terminal fixing assembly further includes at least one cover plate cylinder and at least one terminal clamping cylinder arranged on the operating table, the output end of the cover plate cylinder is connected to the cover plate, and the output end of the terminal clamping cylinder is used to press the terminal.

[0017] Optionally, the flat belt pressing assembly includes a flat belt bracket and at least one flat belt pressing cylinder arranged on the operating table, the output end of the flat belt pressing cylinder is connected to the flat belt pressure plate, and the flat belt pressure plate is located above the flat belt bracket to press and fix the flat belt between the flat belt pressure plate and the flat belt bracket.

[0018] Optionally, a milling welding head assembly is further included, wherein the milling welding head assembly includes a milling welding head fixing piece and at least one milling welding head clamping cylinder arranged on the operating table, and a milling welding head profiling groove for placing the milling welding head terminal is provided on the top of the milling welding head fixing piece; a clamping plate is provided at the output end of the milling welding head clamping cylinder, and the clamping plate presses and contacts a portion of the surface of the milling welding head terminal to press the milling welding head terminal into the milling welding head profiling groove.

[0019] A fixing fixture for friction stir welding according to the present disclosure has the following effects:

[0020] The fixing fixture of the friction stir welding is used to keep the terminal and the flat belt in a fixed state to prevent the relative displacement of the two during the friction stir welding process, which affects the welding quality.

[0021] By setting auxiliary materials on both sides of the welding point, the notch and the weld are formed on one auxiliary material and the other auxiliary material respectively. In the later stage, the auxiliary materials are removed along the original edges of the terminal and the flat strip through milling operation, so as to obtain a finished product without welding defects.

[0022] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0024] Figure 1 A schematic structural diagram of a fixing fixture for friction stir welding according to a preferred embodiment of the present invention;

[0025] Figure 2 It is a structural diagram of the terminal fixing assembly;

[0026] Figure 3 is another structural schematic diagram of the terminal fixing assembly;

[0027] Figure 4 This is another structural schematic diagram of the terminal fixing assembly;

[0028] Figure 5 It is a structural diagram of the flat belt pressing assembly;

[0029] Figure 6 It is a structural diagram of the milling and welding head assembly;

[0030] Figure 7 It is a top view of the milling and welding head assembly;

[0031] Figure 8 is another structural schematic diagram of the milling and welding head assembly;

[0032] Figure 9 It is another structural schematic diagram of the milling and welding head assembly.

[0033] The following are marked in the figure:

[0034] 11-terminal; 12-flat strip; 13-operating table; 14-terminal fixing assembly; 15-flat strip pressing assembly; 16-terminal fixing piece; 17-cover plate; 18-welding area; 19-welding point; 20-welding window; 23-terminal profiling groove; 24-auxiliary material; 25-auxiliary material fixing piece; 26-auxiliary material profiling groove; 27-auxiliary material fixing cylinder; 28-auxiliary material side cylinder; 29-auxiliary material clamping piece; 30-cover plate cylinder; 31-terminal pressing cylinder; 32-flat strip bracket; 33-flat strip clamping cylinder; 34-flat strip pressing plate; 35-milling welding head assembly; 36-milling welding head fixing piece; 37-milling welding head pressing cylinder; 38-milling welding head profiling groove; 39-pressing plate; 40-milling welding head terminal. DETAILED DESCRIPTION

[0035] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0036] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0037] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0038] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0039] According to a fixing fixture for friction stir welding disclosed in the present invention, Figures 1 to 9 As shown, the welding area 18 for fixing the terminal 11 and the flat strip 12 for performing friction stir welding includes an operating table 13 and a terminal fixing assembly 14 and a flat strip pressing assembly 15 provided on the operating table 13;

[0040] The terminal fixing assembly 14 includes a terminal fixing member 16 and a cover plate 17 . The terminal fixing member 16 includes a welding area 18 . The cover plate 17 can be pressed and arranged on the welding area 18 to clamp and fix the first welding area 18 of the terminal 11 .

[0041] The flat belt pressing assembly 15 is used to fix the flat belt 12; the flat belt 12 has a second welding area 18; the second welding area 18 is inserted into the welding area 18, so that the first welding area 18 and the second welding area 18 are oppositely abutted to form a weld 19;

[0042] A welding window 20 is provided on the cover plate 17 , and the welding portion 19 is exposed through the welding window 20 . A stirring needle of the friction stir welding welds the welding portion 19 through the welding window 20 .

[0043] The terminal 11 and the flat strip 12 are fixed by the fixing fixture of the friction stir welding, so as to prevent the relative displacement between the two during the friction stir welding process, thereby preventing the welding quality from being affected.

[0044] In specific implementation, the terminal 11 and the flat strip 12 have mutually abutting protrusions on both sides of the welding point 19, so that the notches and keyholes formed during the stir friction welding process are formed at the position of the protrusions. The protrusions are removed through subsequent milling operations to make the welding area 18 smooth.

[0045] According to an embodiment of a fixing fixture for friction stir welding disclosed in the present invention, Figures 2 to 4 As shown, the terminal fixing member 16 includes a first bottom wall and a side wall protruding from the first bottom wall, the first side wall forms a terminal contour groove 23 around the outer periphery of at least part of the terminal 11, and the terminal contour groove 23 has a blocking portion that limits the terminal 11 from being away from the welding point 19; the first bottom wall protrudes outward to form the welding area 18.

[0046] The terminal profiling groove 23 is used to fix the terminal 11 to prevent the terminal 11 from shifting, and to prevent the first welding area 18 of the terminal 11 in the welding area 18 from being away from the second welding area 18 of the flat strip 12, so as to ensure that the terminal 11 and the flat strip 12 abut against each other when the stirring needle of the stir friction welding rotates past.

[0047] According to an embodiment of a fixing fixture for stir friction welding disclosed in the present invention, two auxiliary materials 24 are placed against both sides of the welding point 19 for auxiliary welding of the welding point 19, and the terminal fixing assembly 14 also includes an auxiliary material fixing piece 25 arranged on the operating table 13 and located on both sides of the welding point 19. The two auxiliary materials 24 are simultaneously pressed and arranged between the cover plate 17 and the auxiliary material fixing piece 25. The welding window 20 also reveals at least part of the auxiliary material 24. The stirring needle rotates to penetrate one auxiliary material 24 and then enters the other auxiliary material 24 through the welding point 19.

[0048] By setting auxiliary materials 24 on both sides of the welding point 19, the notch and the weld are formed on one auxiliary material 24 and the other auxiliary material 24 respectively. In the later stage, the auxiliary materials 24 are removed along the original edges of the terminal 11 and the flat strip 12 through milling operation, thereby obtaining a finished product without welding defects.

[0049] The material of the auxiliary material 24 can be selected from the relatively harder material of the terminal 11 and the flat belt 12 , or other materials with a hardness similar to that of the relatively harder material.

[0050] Specifically, the top of each auxiliary material fixing piece 25 is recessed downward to form an auxiliary material contoured groove 26 communicating with the welding area 18 .

[0051] The auxiliary material contour groove 26 is used to fix the auxiliary material 24 to prevent the auxiliary material 24 from shifting away from the welding area 18, thereby avoiding loosening at the position where the auxiliary material 24 abuts the terminal 11 and the flat strip 12, resulting in gaps and keyholes appearing between the terminal 11 and the flat strip 12.

[0052] Specifically, the terminal fixing assembly 14 also includes two auxiliary material fixing cylinders 27 arranged on the operating table 13, and the output end of each auxiliary material fixing cylinder 27 is connected to an auxiliary material fixing 25 to drive the auxiliary material fixing 25 to move closer to or away from the terminal fixing 16.

[0053] The auxiliary material fixing cylinder 27 is provided to facilitate the placement of the auxiliary material 24 and to clamp the auxiliary material 24 on both sides to the terminals 11 and the flat strip 12 on both sides of the welding area 18, thereby preventing the auxiliary material 24 from shifting during the process of rotating stirring welding with the stirring needle, and forming gaps and welds in the area where the terminal 11 and the flat strip 12 abut.

[0054] More specifically, the auxiliary material profiling groove 26 has a first side opening on its side facing the welding position 19 , and the auxiliary material profiling groove 26 is connected to the welding area 18 via the first side opening.

[0055] The auxiliary material imitating groove 26 is connected to the welding area 18 through the first opening, and the bottom wall of the auxiliary material 24 imitating groove of the terminal 11 is flush with the bottom wall of the welding area 18, so that the two auxiliary materials 24 can clamp the terminal 11 and the flat strip 12 located in the welding area 18.

[0056] More specifically, the side surface of the auxiliary material profiling groove 26 further has a second side opening facing parallel to the extending direction of the flat belt 12;

[0057] The terminal fixing assembly 14 further includes an auxiliary material side cylinder 28 , and an auxiliary material clamping piece 29 is provided at the output end of the auxiliary material side cylinder 28 . The auxiliary material clamping piece 29 is used to block the second side opening and clamp and fix the auxiliary material 24 .

[0058] The second side opening is provided to facilitate adjustment of the position of the auxiliary material 24 in the auxiliary material contour groove 26 , so that the auxiliary material 24 can simultaneously clamp the terminal 11 and the flat strip 12 of the welding area 18 .

[0059] According to an embodiment of a fixing fixture for stir friction welding disclosed in the present invention, the terminal fixing assembly 14 also includes at least one cover cylinder 30 and at least one terminal clamping cylinder 31 arranged on the operating table 13, the output end of the cover cylinder 30 is connected to the cover 17, and the output end of the terminal clamping cylinder 31 is used to press the terminal 11.

[0060] The cover plate cylinder 30 is used to apply pressure to the cover plate 17, so that the cover plate 17 can press the first welding area 18 of the terminal 11 and the second welding area 18 of the flat strip 12 against the welding area 18 on the terminal retainer 16, thereby keeping the terminal 11 and the flat strip 12 stationary during the friction stir welding process. At the same time, the cover plate 17 also presses the auxiliary material 24 between the cover plate 17 and the auxiliary material retainer 25, and simultaneously compresses the terminal 11 and the flat strip 12 from both sides.

[0061] The terminal clamping cylinder 31 can continue to fix the terminal 11 on the fixing member when the cover plate 17 is removed, so that after the terminal 11 and the flat strip 12 are welded, the cover plate 17 and the auxiliary material fixing member 25 are removed, and the auxiliary materials 24 on both sides of the welding area 18 and the redundant areas formed during the welding process are cut off using a milling cutter.

[0062] The material of the auxiliary material 24 can be selected from the relatively harder material of the terminal 11 and the flat belt 12 , or other materials with a hardness similar to that of the relatively harder material.

[0063] According to an embodiment of a fixing fixture for friction stir welding disclosed in the present invention, Figure 5 As shown, the flat belt pressing assembly 15 includes a flat belt bracket 32 ​​and at least one flat belt pressing cylinder 33 arranged on the operating table 13, and the output end of the flat belt pressing cylinder 33 is connected to a flat belt pressing plate 34, and the flat belt pressing plate 34 is located above the flat belt bracket 32 ​​to press and fix the flat belt 12 between the flat belt pressing plate 34 and the flat belt bracket 32.

[0064] The flat strip bracket 32 ​​and the flat strip pressing cylinder 33 are used to fix the flat strip 12 at a position where the terminal 11 can be docked, so that during the subsequent stir friction welding process of the terminal 11 and the flat strip 12, the flat strip 12 can be kept fixed to prevent displacement and affect the welding quality.

[0065] According to an embodiment of a fixing fixture for friction stir welding disclosed in the present invention, Figures 6 to 9As shown, it also includes a milling welding head assembly 35, which includes a milling welding head fixing part 36 and at least one milling welding head clamping cylinder 37 arranged on the operating table 13, and a milling welding head profiling groove 38 for placing the milling welding head terminal 40 is provided on the top of the milling welding head fixing part 36; a clamping plate 39 is provided at the output end of the milling welding head clamping cylinder 37, and the clamping plate 39 presses and contacts a part of the surface of the milling welding head terminal 40 to press the milling welding head terminal 40 into the milling welding head profiling groove 38.

[0066] After the friction stir welding is completed, the surface of the stirring needle of the stirring needle will leave a relatively soft material between the terminal 11 and the flat strip 12. Before the next friction stir welding, the residual material on the stirring needle needs to be cleaned. Therefore, a milling welding head assembly 35 is provided to remove the residual material on the stirring needle. The milling welding head terminal 40 uses a harder material between the terminal 11 and the flat strip 12 to remove the residual material during the process of the stirring needle rotating into the milling welding head terminal 40.

[0067] Although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art will appreciate that the above examples are for illustration only and are not intended to limit the scope of the present invention. Those skilled in the art will appreciate that modifications may be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A fixing fixture for friction stir welding, used to fix the welding area of ​​a terminal and a flat strip for friction stir welding, comprising an operating table and a terminal fixing assembly and a flat strip pressing assembly arranged on the operating table, characterized in that: The terminal fixing assembly includes a terminal fixing member and a cover plate, the terminal fixing member includes a welding area, and the cover plate can be pressed and arranged on the welding area to clamp and fix the first welding area of ​​the terminal; The flat belt pressing assembly is used to fix the flat belt; the flat belt has a second welding area; the second welding area is inserted into the welding area so that the first welding area and the second welding area are relatively abutted to form a weld; A welding window is provided on the cover plate, wherein the welding portion is exposed through the welding window, and a stirring needle of the friction stir welding welds the welding portion through the welding window.

2. The fixing fixture for friction stir welding according to claim 1, characterized in that: The terminal fixing member includes a first bottom wall and a side wall protruding from the first bottom wall, wherein the first side wall forms a terminal profiling groove around at least a portion of the outer periphery of the terminal, and the terminal profiling groove has a blocking portion that limits the terminal from moving away from the welding position; The first bottom wall protrudes outward to form the welding area.

3. The fixing fixture for friction stir welding according to claim 1, characterized in that: Two auxiliary materials are placed against both sides of the welding point for assisting welding of the welding point. The terminal fixing assembly also includes auxiliary material fixing parts arranged on the operating table and located on both sides of the welding point. The two auxiliary materials are simultaneously pressed and arranged between the cover plate and the auxiliary material fixing parts. The welding window also reveals at least part of the auxiliary materials. The stirring needle rotates to penetrate one auxiliary material and then enters the other auxiliary material through the welding point.

4. The fixing fixture for friction stir welding according to claim 3, characterized in that: The top of each auxiliary material fixing piece is recessed downward to form an auxiliary material contoured groove communicating with the welding area.

5. The fixing fixture for friction stir welding according to claim 3, characterized in that: The terminal fixing assembly also includes two auxiliary material fixing cylinders arranged on the operating table, and the output end of each auxiliary material fixing cylinder is connected to an auxiliary material fixing piece to drive the auxiliary material fixing piece to move closer to or away from the terminal fixing piece.

6. The fixing fixture for friction stir welding according to claim 4, characterized in that: The side surface of the auxiliary material profiling groove has a first side opening facing the welding position, and the auxiliary material profiling groove is connected to the welding area via the first side opening.

7. The fixing fixture for friction stir welding according to claim 6, characterized in that: The side surface of the auxiliary material profiling groove further has a second side opening facing parallel to the extending direction of the flat belt; The terminal fixing assembly also includes an auxiliary material side cylinder, and an auxiliary material clamping piece is provided at the output end of the auxiliary material side cylinder. The auxiliary material clamping piece is used to block the second side opening and clamp and fix the auxiliary material.

8. The fixing fixture for friction stir welding according to claim 1, characterized in that: The terminal fixing assembly also includes at least one cover plate cylinder and at least one terminal clamping cylinder arranged on the operating table, the output end of the cover plate cylinder is connected to the cover plate, and the output end of the terminal clamping cylinder is used to press the terminal.

9. The fixing fixture for friction stir welding according to claim 1, characterized in that: The flat belt pressing assembly includes a flat belt bracket and at least one flat belt pressing cylinder arranged on the operating table. The output end of the flat belt pressing cylinder is connected to a flat belt pressure plate. The flat belt pressure plate is located above the flat belt bracket to press and fix the flat belt between the flat belt pressure plate and the flat belt bracket.

10. The fixing fixture for friction stir welding according to claim 1, characterized in that: It also includes a milling welding head assembly, which includes a milling welding head fixing piece and at least one milling welding head clamping cylinder arranged on the operating table, and a milling welding head profiling groove for placing the milling welding head terminal is provided on the top of the milling welding head fixing piece; a clamping plate is provided at the output end of the milling welding head clamping cylinder, and the clamping plate presses and contacts a part of the surface of the milling welding head terminal to press the milling welding head terminal into the milling welding head profiling groove.

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