Friction stir welding leading-in and leading-out block rapid mounting and pressing mechanism

Abstract

The utility model belongs to the technical field of friction stir welding, and particularly relates to a friction stir welding leading-in and leading-out block rapid mounting and pressing mechanism. The welding seam fixing device comprises a welding seam supporting seat, a first fixing device and a second fixing device, wherein the first fixing device and the second fixing device are respectively arranged on two end parts of the welding seam supporting seat; the first fixing device comprises an adjusting part for pushing the leading-in block to move towards the welding seam, the second fixing device comprises an adjusting assembly for pushing the leading-out block to move towards the welding seam, and therefore the leading-in block and the leading-out block can apply force to each other to clamp the to-be-welded part, and at the moment, the adjacent ends of the leading-in block and the leading-out block are tightly attached to the two ends of the welding seam respectively. The welding seam supporting base can abut against or support the non-welding face of the welding seam, a part to be welded can be stabilized conveniently, and normal welding is guaranteed; and the positions of the leading-in block and the leading-out block are convenient to adjust through the first fixing device and the second fixing device, so that the leading-in block and the leading-out block clamp the welding seam, and the welding quality is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of friction stir welding, and particularly relates to a quick installation and pressing mechanism for a friction stir welding introduction and extraction block. Background Art

[0002] Friction stir welding (FSW for short) is a method of using the heat generated by the mutual movement and friction of the end faces of workpieces to make the ends reach a thermoplastic state, and then quickly upsetting to complete the welding.

[0003] In the existing friction welding process where the joint of metal parts is a gap, holes are generally drilled in the metal parts for welding. This will cause some gaps at both ends of the weld seam that cannot be welded, resulting in waste. To avoid this waste, two small process blocks can be installed at both ends of the weld seam, commonly known as the introduction block (the starting welding end is called the introduction block) and the extraction block (the ending welding end is called the extraction block). The positions that cannot be welded are left on the introduction block and the extraction block (the positions that cannot be welded are generally called keyholes). And because the introduction and extraction blocks can be made very small, after the weld seam is welded, the introduction and extraction blocks can be machined off, ensuring the integrity of the welded product and avoiding the waste of the material of the product itself.

[0004] In the prior art, the introduction and extraction blocks are generally directly pressed by screws or pushed by air cylinders. However, these two methods still cannot ensure that the introduction and extraction blocks are tightly attached to the weld seam and cannot meet the welding process requirements. Content of the Utility Model

[0005] In order to overcome the defects in the above-mentioned prior art, the utility model provides a quick installation and pressing mechanism for a friction stir welding introduction and extraction block. The utility model can quickly make the introduction block and the extraction block tightly attached to the weld seam and meet the welding process requirements.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A quick installation and pressing mechanism for a friction stir welding introduction and extraction block includes a weld seam support seat, a first fixing device, and a second fixing device. The first fixing device and the second fixing device are respectively installed on two ends of the weld seam support seat; the first fixing device includes an adjusting member for pushing the introduction block towards the weld seam, and the second fixing device includes an adjusting assembly for pushing the extraction block towards the weld seam, so that the introduction block and the extraction block can apply force to each other to clamp the workpiece to be welded. At this time, the adjacent ends of the introduction block and the extraction block are respectively tightly attached to the two ends of the weld seam.

[0008] Preferably, the adjusting assembly includes a first wedge block and a second wedge block with wedge surfaces adapted to each other; the first wedge block is connected to the pushing member, so that the first wedge block can move perpendicular to the weld seam; the lead-out block is placed above the second wedge block in the height direction. When the pushing member pushes the first wedge block to act, due to the cooperation of the wedge surfaces, the second wedge block is pushed upward, and then a lifting driving action on the lead-out block is generated.

[0009] Preferably, the second fixing device further includes an adjusting fixing seat fixedly connected to the weld support seat. A second groove is provided on the adjusting fixing seat facing the weld seam. The first wedge block, the second wedge block and the lead-out block are sequentially placed in the second groove along the length direction of the weld seam. The pushing member is a rotating screw. A first through hole perpendicular to the weld seam is provided on the adjusting fixing seat. The rotating screw passes through the first through hole and is threadedly connected to the threaded hole on the first wedge block.

[0010] Preferably, two limiting blocks for restricting the axial movement of the pushing member are fixedly provided on the pushing member, and the two limiting blocks are distributed at both ends of the first through hole.

[0011] Preferably, the first fixing device further includes a flipping body hinged to the weld support seat and a fixing assembly for fixing the flipping body. A first groove with an opening facing the weld seam is provided on the flipping body, and the introducing block is placed in the first groove. The adjusting member is a first set screw, and the pushing end of the adjusting member is placed in the first groove and contacts the introducing block.

[0012] Preferably, the fixing assembly includes a bolt, a bolt limiting seat for limiting the bolt, and a bolt fixing seat. The bolt limiting seat is fixed on the flipping body, the bolt fixing seat is fixed on the weld support seat, and the fixed end of the bolt passes through the bolt limiting seat and is detachably connected to the bolt fixing seat.

[0013] Preferably, a limiting ring for restricting the axial movement of the bolt is fixedly sleeved on the bolt, and the limiting ring is placed in the bolt limiting seat.

[0014] Preferably, a second through hole is provided through the bolt limiting seat, a third through hole is provided on the bolt fixing seat, the fixed end of the bolt passes through the second through hole and is connected to the third through hole, and the central axis of the third through hole is collinear with the central axis of the second through hole.

[0015] Preferably, a plurality of bead screws are provided on the bolt fixing seat. The end of the bead screw with a bead is placed in the third through hole, and the bead screw is elastically engaged with a card slot embedded on the fixed end of the bolt.

[0016] Preferably, an operation ball is provided at one end of the bolt away from the bolt fixing seat; a spring is further sleeved on the bolt, and the spring is connected to one side of the limiting ring close to the bolt fixing seat; a limiting screw is further provided on the flipping body; the weld support seat abuts against the non-welding side of the weld seam.

[0017] The advantages of the present utility model are as follows:

[0018] (1) The weld support base provided by the present utility model can abut against or support the non-welded surface of the weld, facilitating the stabilization of the metal parts (parts to be welded) and ensuring the normal progress of welding. The provided first fixing device and second fixing device facilitate the adjustment of the positions of the introducing block and the leading-out block, enabling the introducing block and the leading-out block to tightly adhere to the metal parts, improving the welding quality, and being convenient to operate, facilitating the quick disassembly and assembly of the introducing block and the leading-out block.

[0019] (2) The present utility model arranges the introducing block in the first groove. By turning the adjusting member, the purpose of pushing the introducing block towards the weld can be achieved, facilitating the quick adhesion and fixation of the introducing block to the end of the weld and meeting the process requirements of welding.

[0020] (3) The present utility model is provided with two wedge-shaped first wedge blocks and second wedge blocks. When the pushing member (rotating screw) rotates, the first wedge block can move in a direction perpendicular to the length direction of the weld, and then push the second wedge block to move along the length direction of the weld, thereby realizing the movement of the leading-out block along the length direction of the weld, facilitating the leading-out block to tightly adhere to the end of the weld. And because the metal parts are arranged vertically, the second fixing device is convenient for applying force to the first wedge block to move the leading-out block towards the weld.

[0021] (4) The present utility model only needs to pull or push the operating ball to realize the detachment and fixation of the pin, making the loading and unloading of the introducing block more convenient and greatly improving the work efficiency. The provided limit screw is convenient for adjusting the position of the pin, making the central axis of the pin coincide with the central axis of the third through hole, ensuring the accurate insertion of the pin into the third through hole. Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of the present utility model.

[0023] Figure 2 is a schematic structural diagram of the weld support base of the present utility model.

[0024] Figure 3 is a partially enlarged schematic structural diagram of the introducing block of the present utility model.

[0025] Figure 4 is a schematic sectional structure diagram of the pin limiting seat of the present utility model.

[0026] Figure 5 is a schematic sectional structure diagram of the joint fixing seat of the present utility model.

[0027] The meanings of the reference symbols in the drawings are as follows:

[0028] 21 - Weld support seat, 22 - Introduction block, 23 - Outlet block, 24 - First fixing device, 241 - Flipping body, 2411 - First groove, 242 - Adjusting member, 243 - Limit screw, 25 - Fixing assembly, 251 - Pin limit seat, 2511 - Second perforation, 252 - Pin fixing seat, 2521 - Third perforation, 253 - Pin, 2531 - Card slot, 26 - Glass bead screw, 27 - Second fixing device, 271 - Adjusting fixing seat, 2711 - Second groove, 272 - Adjusting assembly, 2721 - Pushing member, 2722 - First wedge block, 2723 - Second wedge block, 273 - Threaded hole, 274 - Limit block, 275 - First perforation, 28 - Operating ball, 291 - Limit ring. Detailed implementation mode

[0029] As Figures 1-5 shown, a quick installation and pressing mechanism for the introduction and outlet blocks of friction stir welding is used to fix and push the introduction block 22 and the outlet block 23. The mechanism includes a weld support seat 21, a first fixing device 24 and a second fixing device 27. The first fixing device 24 includes a flipping body 241, a fixing assembly 25 for fixing the flipping body 241 and an adjusting member 242; the second fixing device 27 includes an adjusting fixing seat 271 fixedly connected to the weld support seat 21 and an adjusting assembly 272 for moving the outlet block 23 along the weld direction, so that the introduction block 22 and the outlet block 23 can exert force on each other to clamp the workpiece to be welded. At this time, the adjacent ends of the introduction block 22 and the outlet block 23 are respectively in close contact with the two ends of the weld.

[0030] Specifically, the flipping body 241 is placed on the top of the weld support seat 21 and is hinged to the weld support seat 21 through a rotating shaft. The flipping body 241 is provided with a first groove 2411 with an opening facing the weld. The introduction block 22 is fixed in the first groove 2411 through a third set screw on the side wall of the first groove 2411; the adjusting fixing seat 271 is fixedly placed at the bottom of the side wall of the non-welded surface of the weld support seat 21 and the flipping body 241 and the adjusting fixing seat 271 are located on the same side wall of the weld support seat 21.

[0031] As Figures 1-2 shown, when welding the weld in the vertical direction, the side surface of the weld support seat 21 is in the shape of a right trapezoid, and the side wall surface of the right-angled side of the weld support seat 21 is an arc surface, that is, the side wall of the weld support seat 21 located between the introduction block 22 and the outlet block 23, so that the contact surface between the weld support seat 21 and the weld is more fitting, and this side wall is used to abut against the non-welded side of the weld. When welding the weld in the horizontal direction, the weld support seat 21 can be in the shape of a flat cuboid.

[0032] Furthermore, as Figures 2-4As shown, the adjusting member 242 is a first setscrew, and the flipping body 241 is in a "7" shape. That is, the flipping body 241 is composed of a horizontal plate and a vertical plate. The horizontal plate is arranged perpendicular to the length direction of the weld, and the vertical plate is parallel to the length direction of the weld. The first groove 2411 is located on the vertical plate. The opening of the first groove 2411 faces the weld and is in a "U" shape. A first threaded hole runs through the first groove 2411 on the vertical plate. The first setscrew passes through the first groove 2411 and is threadedly connected to the first threaded hole. The first threaded hole is arranged along the length direction of the weld. When the first setscrew is turned, the end of the first setscrew pushes the introducing block 22 to move along the length direction of the weld, so that the introducing block 22 fits with the end of the weld. At the same time, the shape of the introducing block 22 is adapted to the shape of the first groove 2411, and third setscrews are threadedly connected through both side walls of the first groove 2411. The ends of the third setscrews contact the introducing block 22, which is convenient for further fixing the introducing block 22 after the introducing block 22 fits with the end of the weld.

[0033] The fixing assembly 25 includes a plug pin 253, a plug pin limit seat 251 for limiting the plug pin 253, and a plug pin fixing seat 252. The plug pin fixing seat 252 is fixed on two side walls of the weld support seat 21, and one end of the plug pin 253 passes through the plug pin limit seat 251 and is detachably connected to the plug pin fixing seat 252.

[0034] Plug pin limit seats 251 are fixedly installed on both outer side walls of the vertical plate of the flipping body 241. A second through hole 2511 is provided on the plug pin limit seat 251, and a third through hole 2521 is provided on the plug pin fixing seat 252. The fixed end of the plug pin 253 passes through the second through hole 2511 and is connected to the third through hole 2521. The central axis of the third through hole 2521 is collinear with the central axis of the second through hole 2511. A limit ring 291 is fixedly sleeved on the plug pin 253. The aperture at both ends of the second through hole 2511 is smaller than the aperture in the middle section. The outer diameter of the limit ring 291 is larger than the aperture at the end of the second through hole 2511, and the outer diameter of the limit ring 291 is smaller than the aperture in the middle section of the second through hole 2511, so that the limit ring 291 is restricted within the second through hole 2511, thereby preventing the plug pin 253 from coming out of the plug pin limit seat 251. A number of bead screws 26 are provided on the plug pin fixing seat 252. The end of the bead screw 26 with a bead is placed in the third through hole 2521. The bead screw 26 is elastically snap-fitted with a card slot 2531 embedded on the fixed end of the plug pin 253. When the plug pin 253 is inserted into the third through hole 2521, the bead on the bead screw 26 will snap into the corresponding card slot 2531 on the plug pin 253, thus playing a role in limiting.

[0035] An operation ball 28 is provided at one end of the plug pin 253 away from the plug pin fixing seat 252. The size of the operation ball 28 is larger than the diameter of the plug pin 253, which is convenient for pulling the plug pin 253 and improves the convenience of use.

[0036] A spring is also sleeved on the bolt 253. The spring is located within the second through-hole 2511 and on the side of the limiting ring 291 closer to the bolt fixing seat 252. When it is necessary to fix the introduction block 22, the operation ball 28 is pushed, so that the card slot 2531 on the bolt 253 engages with the glass bead screw 26, and the spring is in a compressed state. After welding is completed, the operation ball 28 is pulled. Under the action of the spring, the bolt 253 disengages from the bolt fixing seat 252, and the bolt 253 retracts, avoiding interference between the bolt 253 and the bolt fixing seat 252.

[0037] A limiting screw 243 is also provided on the flipping body 241. The limiting screw 243 is installed on the cross plate of the flipping body 241. After the flipping body 241 flips down, the limiting screw 243 thereon will contact the top surface of the weld support seat 21, playing a role in limiting and adjusting the position. By turning the limiting screw 243, the central axis of the bolt 253 can be made to coincide with the central axis of the third through-hole 2521, restricting the position of the flipping body 241 along the length direction of the weld, and ensuring that the bolt 253 can be accurately inserted into the third through-hole 2521.

[0038] Furthermore, as Figure 1 and 5 shown, the adjusting fixing seat 27 is provided with a second groove 2711 with an opening facing the weld. The adjusting assembly 272 and the lead-out block 23 are sequentially placed within the second groove 2711 along the length direction of the weld.

[0039] The adjusting assembly 272 includes a pushing member 2721 (which can be a rotating screw), a first wedge block 2722, and a second wedge block 2723. The wedge surfaces of the first wedge block 2722 and the second wedge block 2723 in contact with each other are adapted to each other, such that the first wedge block 2722 and the second wedge block 2723 form a square shape. The first wedge block 2722, the second wedge block 2723, and the lead-out block 23 are sequentially arranged within the second groove 2711 along the length direction of the weld, and the contact surface between the second wedge block 2723 and the lead-out block 23 is a plane, ensuring stable movement of the lead-out block 23 when the second wedge block 2723 moves.

[0040] The adjusting fixing seat 271 is also provided with a first through-hole 275 perpendicular to the weld. The rotating screw passes through the first through-hole 275 and is threadedly connected to the threaded hole 273 on the first wedge block 2722. Two limiting blocks 274 are fixed on the rotating screw, and the two limiting blocks 274 are distributed at both ends of the first through-hole 275, such that when the rotating screw is turned, the rotating screw only rotates, and the first wedge block 2722 threadedly connected to the rotating screw can move in a direction perpendicular to the length direction of the weld, thereby pushing the second wedge block 2723 to move along the length direction of the weld, causing the lead-out block 23 to move along the length direction of the weld.

[0041] A plurality of second threaded holes are penetratingly provided in the side wall of the second groove 2711. The second threaded holes are threadedly connected with second set screws, and the end of the second set screw contacts the lead-out block 23. Turning the second set screw can fix the lead-out block 23 in the second groove 2711.

[0042] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A quick installation and pressing mechanism for friction stir welding introduction and extraction blocks, characterized in that, It includes a weld support seat (21), a first fixing device (24) and a second fixing device (27). The first fixing device (24) and the second fixing device (27) are respectively installed on two ends of the weld support seat (21). The first fixing device (24) includes an adjusting member (242) for pushing the introducing block (22) towards the weld. The second fixing device (27) includes an adjusting assembly (272) for pushing the extracting block (23) towards the weld, so that the introducing block (22) and the extracting block (23) can apply forces to each other to clamp the workpiece to be welded. At this time, the adjacent ends of the introducing block (22) and the extracting block (23) are respectively in close contact with two ends of the weld.

2. The quick installation and pressing mechanism for the friction stir welding introduction and extraction block according to claim 1, characterized in that: The adjusting assembly (272) includes a first wedge block (2722) and a second wedge block (2723) with matching wedge surfaces. The first wedge block (2722) is connected to a pushing member (2721) so that the first wedge block (2722) can move perpendicular to the weld. The extracting block (23) is placed above the second wedge block (2723) in the height direction. When the pushing member (2721) pushes the first wedge block (2722) to act, the second wedge block (2723) is pushed upward due to the wedge surface cooperation, and then a lifting drive action on the extracting block (23) is generated.

3. The rapid installation and pressing mechanism of the friction stir welding introduction and extraction block according to claim 2, characterized in that: The second fixing device (27) further includes an adjusting fixing seat (271) fixedly connected to the weld support seat (21). A second groove (2711) facing the weld is provided on the adjusting fixing seat (271). The first wedge block (2722), the second wedge block (2723) and the extracting block (23) are sequentially placed in the second groove (2711) along the length direction of the weld. The pushing member (2721) is a rotating screw. A first through hole (275) perpendicular to the weld is provided on the adjusting fixing seat (271). The rotating screw passes through the first through hole (275) and is threadedly connected to a threaded hole (273) on the first wedge block (2722).

4. A quick installation and pressing mechanism for a friction stir welding introduction and extraction block according to claim 2, characterized in that: Two limiting blocks (274) for restricting axial movement of the pushing member (2721) are fixedly provided on the pushing member (2721). The two limiting blocks (274) are distributed at both ends of the first through hole (275).

5. The quick installation and pressing mechanism for the friction stir welding introduction and extraction block according to claim 2, characterized in that: The first fixing device (24) further includes a flipping body (241) hinged to the weld support seat (21) and a fixing assembly (25) for fixing the flipping body (241). A first groove (2411) with an opening facing the weld is provided on the flipping body (241). The introducing block (22) is placed in the first groove (2411). The adjusting member (242) is a first set screw, and the pushing end of the adjusting member (242) is placed in the first groove (2411) and contacts the introducing block (22).

6. The rapid installation and pressing mechanism of the friction stir welding introduction and extraction block according to claim 5, characterized in that: The fixing component (25) includes a bolt (253), a bolt limiting seat (251) for limiting the bolt (253), and a bolt fixing seat (252). The bolt limiting seat (251) is fixed on the flipping body (241), the bolt fixing seat (252) is fixed on the weld support seat (21), and the fixed end of the bolt (253) penetrates through the bolt limiting seat (251) and is detachably connected to the bolt fixing seat (252).

7. A rapid installation and pressing mechanism for a friction stir welding introduction and extraction block according to claim 6, characterized in that: A limiting ring (291) for restricting axial movement of the bolt (253) is fixedly sleeved on the bolt (253), and the limiting ring (291) is placed inside the bolt limiting seat (251).

8. The quick installation and pressing mechanism of the friction stir welding introduction and extraction block according to claim 7, characterized in that: A second through hole (2511) is provided through the bolt limiting seat (251), a third through hole (2521) is provided on the bolt fixing seat (252), the fixed end of the bolt (253) penetrates through the second through hole (2511) and is connected to the third through hole (2521), and the central axis of the third through hole (2521) is collinear with the central axis of the second through hole (2511).

9. The quick installation and pressing mechanism of the friction stir welding introducing and withdrawing block according to claim 8, characterized in that: A number of bead screws (26) are provided on the bolt fixing seat (252). One end of the bead screw (26) with a bead is placed inside the third through hole (2521), and the bead screw (26) is elastically snap-fitted with a card slot (2531) embedded on the fixed end of the bolt (253).

10. A quick installation and pressing mechanism for a friction stir welding introduction and extraction block according to claim 7, characterized in that: An operation ball (28) is provided at one end of the bolt (253) away from the bolt fixing seat (252); a spring is also sleeved on the bolt (253), and the spring is connected to the side of the limiting ring (291) close to the bolt fixing seat (252); a limiting screw (243) is also provided on the flipping body (241); the weld support seat (21) abuts against the non-welding side of the weld.

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