Clamp and welding equipment for multi-section long round bar-like part welding

Abstract

The utility model provides a kind of clamp and welding equipment for multi-section long round rod class parts splicing welding, clamp includes: bottom plate;Swing frame, rotation is installed in bottom plate;Positioning block, it is set to swing frame, and main V-shaped groove for positioning long round rod class parts is opened on positioning block, the extension direction of main V-shaped groove is parallel with the rotation axis of swing frame relative to bottom plate rotation;Press head, adjustably set in swing frame, for pressing long round rod class parts in main V-shaped groove;Full welding driving part, including driving portion and jaw, define all long round rod class parts assembled in main V-shaped groove constitute welded long rod, jaw is at one end of welded long rod, for grabbing this welded long rod;The rotation axis of jaw relative to driving portion, the rotation axis of welded long rod and swing frame relative to bottom plate rotation three coaxial.The utility model can realize the automatic displacement of welded long rod, can guarantee the coaxial degree of long round rod class parts splicing welding.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, and in particular to a fixture and welding equipment for welding multi-segment long round rod parts. Background Technology

[0002] Long round rod parts, especially slender round rod parts, are difficult to process. During the one-piece processing, the parts are prone to bending. Therefore, long round rod parts are usually processed in sections and then welded together.

[0003] Currently, the splicing and welding of multi-segment parts such as long cylindrical rods requires segmented welding on a rotary chuck mechanism, which is not only cumbersome but also makes it difficult to ensure the coaxiality of multi-segment welding, resulting in unstable welding and inconsistent quality.

[0004] Chinese Patent Publication No. CN110170789A discloses an automatic positioning fixture for butt welding of long rod-like parts, which solves the problems of poor coaxiality, difficult butt welding, and inability to automatically rotate and reposition long rod-like parts in the prior art. Specifically, the long rod-like parts are fixed to the inner ring of a support bearing by clamping elements, and a motor drives the long rod-like parts to rotate through a coupling and other mechanisms to perform circumferential welding. The number of support bearings can be increased according to the length of the long rod-like parts to increase rigidity, improve butt welding accuracy, reduce butt welding difficulty, and effectively ensure the coaxiality of long rod-like parts during butt welding.

[0005] However, when using this fixture, the long rods are assembled on the support bearings. Understandably, the more long rods that need to be welded, the more support bearings are required. Theoretically, the support bearings should be spaced apart along the axial direction of the long rods. However, assembly errors in the support bearings are unavoidable. With a large number of support bearings installed, these errors accumulate, affecting the coaxiality of the welded long rods. Furthermore, when positioning the long rods within the support bearings, fine-tuning with set screws is required to align the weld seam. Manual fine-tuning makes it difficult to guarantee the stability of the long rods' coaxiality and the welding quality. Additionally, the welded long rods, inserted into the support bearings, need to be pulled out axially to detach from the fixture. This requires a large working space, and the disassembly process can easily scratch parts. For thin-walled, slender cylindrical parts, this disassembly method can easily cause bending and deformation, making the work difficult and inefficient. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the first objective of this utility model is to provide a fixture for welding multi-segment long cylindrical rod parts, which occupies little space, is easy to operate, and helps to ensure processing quality and work efficiency.

[0007] The second objective of this invention is to provide a welding device for welding multiple long cylindrical rod-like parts, which can achieve high-precision welding of multiple long cylindrical rod-like parts, ensure coaxiality, and has high efficiency.

[0008] The embodiments of this utility model are achieved through the following technical solutions:

[0009] A fixture for welding multiple long cylindrical rod-like parts includes: a base plate; a swing frame rotatably mounted on the base plate; a positioning block disposed on the swing frame, the positioning block having a main V-groove for positioning the long cylindrical rod-like parts, the extension direction of the main V-groove being parallel to the rotation axis of the swing frame relative to the base plate; a pressure head adjustablely disposed on the swing frame for pressing the long cylindrical rod-like parts located within the main V-groove; and a full-welding drive component including a drive unit and a gripper, the drive unit being disposed on the swing frame, the gripper being disposed on the drive unit and driven to rotate by the drive unit, defining all the long cylindrical rod-like parts assembled in the main V-groove as a weldable long rod, the gripper being located at one end of the weldable long rod for gripping the weldable long rod; the rotation axis of the gripper relative to the drive unit, the weldable long rod, and the rotation axis of the swing frame relative to the base plate are coaxial. This fixture limits the long rod to be welded by using the main V-groove to ensure the coaxiality of the various elongated rod-like parts that make up the long rod, thus improving the machining accuracy of the long rod. During the pre-welding stage, the elongated rod-like parts are fixed in the main V-groove and rotate around their own central axis following the movement of the swing frame. This ensures the stability of the posture of the elongated rod-like parts during the pre-welding process, which is beneficial to improving welding accuracy and further ensuring the coaxiality of the various parts of the long rod. After the long rod is fully welded by rotating it through the grippers, it can be removed from the main V-groove. It occupies little space, is easy to operate, and helps to ensure processing quality and work efficiency.

[0010] According to a preferred embodiment, a first shaft frame and a second shaft frame are disposed opposite to each other on the base plate, and the swing frame is rotatably connected to the first shaft frame and the second shaft frame respectively; a first driving member is disposed on the base plate, and the first driving member is used to drive the swing frame to rotate relative to the first shaft frame and the second shaft frame.

[0011] According to a preferred embodiment, the positioning block has a pre-welding notch corresponding to the weld, and the pre-welding notch is connected to the main V-groove.

[0012] According to a preferred embodiment, the pre-welded notch extends to the inner side of the main V-groove.

[0013] According to a preferred embodiment, the bottom inner surface of the main V-groove is defined as a reference plane, and the bottom inner surface of the pre-welded notch is defined as an inclined plane, the inclined plane extending to the reference plane; the end of the inclined plane near the reference plane is defined as the proximal end, and the end of the inclined plane away from the reference plane is defined as the distal end; in the depth direction of the main V-groove, the distance between the proximal end and the central axis of the welded rod is less than the distance between the distal end and the central axis of the welded rod.

[0014] According to a preferred embodiment, the swing frame is equipped with a hinge seat corresponding to the pressure head, the pressure head is rotatably mounted on the hinge seat, and the pressure head can move closer to or further away from the main V-groove in a manner that is rotatable relative to the hinge seat; a first magnet is equipped on the pressure head, and a second magnet corresponding to the first magnet is equipped on the positioning block, and the first magnet and the second magnet attract each other.

[0015] According to a preferred embodiment, there are multiple pressure heads, which are spaced apart along the axial direction of the welded long rod; the multiple pressure heads are connected in series by connecting rods.

[0016] According to a preferred embodiment, the positioning block has a first guide groove on one side facing the swing frame, and a first guide hole is provided at the bottom of the first guide groove, which is connected to the main V-groove; a guide block is assembled in the first guide groove, and a lifting block is disposed on the guide block, which is slidably embedded in the first guide hole; the guide block can move closer to or away from the first guide hole in the first guide groove, so that the lifting block moves closer to or away from the welded long rod in the first guide hole.

[0017] According to a preferred embodiment, a return spring is disposed between the guide block and the bottom inner side of the first guide groove.

[0018] According to a preferred embodiment, the swing frame has a second guide groove on one side facing the positioning block that corresponds to and communicates with the first guide groove. A second guide hole is provided through the bottom of the second guide groove. A driving pin is slidably embedded in the second guide hole. A driving block is disposed at one end of the driving pin near the first guide groove. The outer diameter of the driving block is larger than the inner diameter of the second guide hole. The driving block can extend from the second guide groove into the first guide groove to drive the guide block to move toward the first guide hole.

[0019] A welding device for welding multiple long cylindrical rod-like parts includes a laser welding head and the aforementioned fixture for welding multiple long cylindrical rod-like parts. This welding device can achieve high-precision welding of multiple long cylindrical rod-like parts, ensuring coaxiality and high efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A three-dimensional structural diagram of the clamp provided in the embodiment of this utility model;

[0022] Figure 2 for Figure 1 A partially enlarged schematic diagram of the structure at point A;

[0023] Figure 3 for Figure 1 A magnified view of the structure at point B in the middle;

[0024] Figure 4 This is a schematic diagram of the assembly structure of the pressure head and the positioning block in this utility model;

[0025] Figure 5 A front view of the fixture provided in an embodiment of this utility model;

[0026] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure at section CC;

[0027] Figure 7 for Figure 6 A partially enlarged schematic diagram of the structure at point E in the middle;

[0028] Figure 8 An exploded view of the assembly structure of the swing frame and drive pin provided in an embodiment of this utility model;

[0029] Figure 9 for Figure 5 Schematic diagram of the cross-sectional structure at section DD;

[0030] Figure 10 for Figure 9 A magnified schematic diagram of the structure at point F.

[0031] Icons: 1. Base plate; 11. First shaft bracket; 12. Second shaft bracket; 13. First drive component; 14. Third shaft bracket; 15. Coupling; 2. Swing frame; 21. Hinge seat; 211. First pin; 22. Second guide groove; 221. Second guide hole; 23. Limiting block; 24. Snap-fit ​​groove; 3. Positioning block; 31. Main V-groove; 311. Reference plane; 32. Pre-welded notch; 321. Inclined plane; 33. Second magnet; 34. 1. First guide groove; 35. First guide hole; 4. Welded long rod; 40. Weld seam; 41. Long round rod-like part; 5. Fully welded drive component; 50. Clamping jaw; 501. Secondary V-groove; 51. Drive unit; 6. Pressure head; 61. First magnet; 62. Connecting rod; 63. Roller; 64. Second pin; 7. Guide block; 71. Lifting block; 72. Return spring; 8. Drive pin; 81. Drive block; 9. Lifting cylinder; a. Proximal end; b. Distal end. Detailed Implementation

[0032] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0033] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0035] Please refer to Figures 1 to 10A fixture for welding multi-segment long cylindrical rod-like parts includes a base plate 1, a swing frame 2, a positioning block 3, a pressure head 6, and a full-welding drive component 5. The swing frame 2 is rotatably mounted on the base plate 1. The positioning block 3 is disposed on the swing frame 2 and has a main V-groove 31 for positioning the long cylindrical rod-like parts 41. The extension direction of the main V-groove 31 is parallel to the axis of rotation of the swing frame 2 relative to the base plate 1. The pressure head 6 is adjustablely disposed on the swing frame 2 and is used to press the long cylindrical rod-like parts 41 within the main V-groove 31. Part 41; The full-welding drive component 5 includes a drive unit 51 and a gripper 50. The drive unit 51 is disposed on the swing frame 2, and the gripper 50 is disposed on the drive unit 51 and is driven to rotate by the drive unit 51. All the long cylindrical rod-like parts 41 assembled in the main V-groove 31 constitute the welded long rod 4. The gripper 50 is located at one end of the welded long rod 4 and is used to grip the welded long rod 4. The rotation axis of the gripper 50 relative to the drive unit 51, the welded long rod 4, and the rotation axis of the swing frame 2 relative to the base plate 1 are coaxial. Optionally, the number of pressure heads 6 is the same as the number of long cylindrical rod-like parts 41, and they are arranged in a one-to-one correspondence.

[0036] In use, the long cylindrical rod-like parts 41 to be welded are first placed in the main V-groove 31 and spliced ​​together to form the welded long rod 4. Then, the corresponding long cylindrical rod-like parts 41 are pressed and fixed by the pressure head 6, thereby fixing the welded long rod 4 within the main V-groove 31. Under the limiting action of the main V-groove 31, the coaxiality, i.e., concentricity, of the multiple long cylindrical rod-like parts 41 is ensured. Simultaneously, the long cylindrical rod-like parts 41 adjacent to the fully welded drive component 5 are assembled onto the gripper 50. Subsequently, the swing frame 2 rotates relative to the base plate 1 within a certain angle range, thus exhibiting a swinging motion. During the process, the welded long rod 4, located within the main V-groove 31, moves with the swing frame 2 to rotate around its central axis. During this process, a laser welding head is used to pre-weld the weld seam 40 (spot welding or partial continuous welding can be performed depending on the actual situation). This allows the welded long rod 4, composed of multiple long cylindrical rod-like parts 41, to form a single unit, significantly improving its rigidity. Finally, the gripper 50 rotates relative to the drive unit 51 to drive the welded long rod 4 to rotate around its central axis within the main V-groove 31, during which the weld seam 40 is fully welded. At this point, the welding of the welded long rod 4 is complete. After the gripper 50 disengages from the welded long rod 4, the pressure head 6 releases its restriction on the welded long rod 4, allowing the welded long rod 4 to be removed from the main V-groove 31. Compared to existing technologies, this fixture limits the welded long rod 4 through the main V-groove 31 to ensure the coaxiality of the various long cylindrical rod parts 41 that make up the welded long rod 4, thereby improving the machining accuracy of the welded long rod 4. During the pre-welding stage, the long cylindrical rod parts 41 are fixed in the main V-groove 31 and rotate around their own central axis following the movement of the swing frame 2, ensuring the stability of the posture of the long cylindrical rod parts 41 during the pre-welding process, which is conducive to improving welding accuracy and further ensuring the coaxiality of the various parts of the welded long rod 4. After the welded long rod 4 is fully welded by driving the rotation of the gripper 50, it can be removed from the main V-groove 31. This fixture occupies little space, is easy to operate, and is conducive to ensuring processing quality and work efficiency.

[0037] like Figure 1 and Figure 3 As shown, there are two grippers 50, which are arranged opposite each other. A secondary V-groove 501 is formed on the adjacent sides of the two grippers 50 for positioning and clamping the long rod 4 to be welded. In use, the full-welding drive unit 5, consisting of the grippers 50 and the drive unit 51, can be an electrically driven rotary gripper 50. In some embodiments, the electrically driven rotary gripper 50 can be a three-jaw chuck, in which case the secondary V-groove 501 is not required on the grippers 50. The electrically driven rotary gripper 50 is prior art and will not be described in detail here.

[0038] like Figure 1 and Figure 5As shown, a first shaft frame 11 and a second shaft frame 12 are arranged opposite to each other on the base plate 1, and the swing frame 2 is rotatably connected to the first shaft frame 11 and the second shaft frame 12 respectively; a first driving member 13 is arranged on the base plate 1, which is used to drive the swing frame 2 to rotate relative to the first shaft frame 11 and the second shaft frame 12. The first end of the swing frame 2 is rotatably assembled to the first shaft frame 11 through a bearing, and the second end of the swing frame 2 is rotatably assembled to the second shaft frame 12 through a bearing. Both ends of the swing frame 2 are fixedly connected to the inner ring of the corresponding bearing; a third shaft frame 14 is also arranged on the base plate 1, and the second shaft frame 12 is located between the first shaft frame 11 and the third shaft frame 14. The first driving member 13 is a motor, which is assembled to the third shaft frame 14, and the first driving member 13 is connected to the second end of the swing frame 2 through a coupling 15.

[0039] like Figure 1 and Figure 2 As shown, the positioning block 3 has a pre-welding notch 32 corresponding to the weld 40, which connects to the main V-groove 31. This pre-welding notch 32 exposes more of the weld 40 area circumferentially on the long rod 4 to allow for more weld point selection during the pre-welding stage, thus ensuring sufficient pre-welding at the weld 40 to guarantee the rigidity of the long rod 4 and maintain coaxiality without deformation during subsequent full-scale rotation welding. In use, the laser beam can be projected onto the weld 40 through the area above the main V-groove 31 or through the pre-welding notch 32.

[0040] Optionally, the pre-welding notch 32 extends to the inner side of the main V-groove 31. This allows for continuous pre-welding of both the weld area 40 exposed through the main V-groove 31 and the weld area 40 exposed through the pre-welding notch 32 during the rotation of the swing frame 2, improving work efficiency. In other words, the weld area 40 exposed through the main V-groove 31 and the weld area 40 exposed through the pre-welding notch 32 are continuous, with no obstruction between them, facilitating continuous pre-welding.

[0041] Furthermore, such as Figure 5 , Figure 9 and Figure 10As shown, the bottom inner surface of the main V-groove 31 is defined as the reference plane 311, and the bottom inner surface of the pre-welding notch 32 is defined as the inclined plane 321, which extends to the reference plane 311. The end of the inclined plane 321 closest to the reference plane 311 is defined as the proximal end a, and the end of the inclined plane 321 furthest from the reference plane 311 is defined as the distal end b. In the depth direction of the main V-groove 31, the distance between the proximal end a and the central axis of the welded long rod 4 is less than the distance between the distal end b and the central axis of the welded long rod 4. The rotation axis of the swing frame 2 is coaxial with the welded long rod 4, or in other words, the rotation axis of the swing frame 2 is collinear with the central axis of the welded long rod 4. The structural design that the distance between the proximal end a and the central axis of the welded long rod 4 is less than the distance between the distal end b and the central axis of the welded long rod 4 in the depth direction of the main V-groove 31 increases the channel width of the laser beam projected into the weld seam 40 area, allowing more of the weld seam 40 area to be exposed, thus providing the possibility for more thorough pre-welding. For example, in the depth direction of the main V-groove 31, the distance between the near end a and the central axis of the welded long rod 4 is H1, and the distance between the far end b and the central axis of the welded long rod 4 is H2. Then, H2 > H1.

[0042] like Figure 4 As shown, the swing frame 2 is equipped with a hinge seat 21 corresponding to the pressure head 6. The pressure head 6 is rotatably mounted on the hinge seat 21, and the pressure head 6 can move closer to or further away from the main V-groove 31 by rotating relative to the hinge seat 21. A first magnet 61 is mounted on the pressure head 6, and a second magnet 33 corresponding to the first magnet 61 is mounted on the positioning block 3. The first magnet 61 and the second magnet 33 attract each other. Specifically, the pressure head 6 is rotatably mounted on the hinge seat 21 via a first pin 211. The pressure head 6 is magnetically fixed by the mutual attraction of the first magnet 61 and the second magnet 33, realizing the rapid pressing of the pressure head 6 on the long cylindrical rod-like part 41 or the welded long rod 4.

[0043] like Figure 1 and Figure 5 As shown, there are multiple pressure heads 6, which are spaced apart along the axial direction of the long rod 4 to be welded; the multiple pressure heads 6 are connected in series by connecting rods 62. This arrangement facilitates simultaneous control of multiple pressure heads 6, improving work efficiency. Preferably, the axial direction of the connecting rod 62 is parallel to the axial direction of the long rod 4 to be welded.

[0044] Optionally, such as Figure 2 and Figure 4As shown, a roller 63 is rotatably mounted on the top of the pressure head 6 via a second pin 64, and the axial direction of the roller 63 is parallel to the axial direction of the long rod 4 to be welded. During use, the roller 63 makes line contact with the long rod 4 to be welded. Specifically, during the full welding stage, as the long rod 4 rotates, the roller 63 limits its movement to prevent it from jumping, and also helps reduce the friction between the pressure head 6 and the long rod 4. In another embodiment, the working end of the pressure head 6 can also be configured as a cylindrical surface protruding towards the long rod 4 to be welded. Correspondingly, during the rotation of the long rod 4, the long rod 4 slides and rubs against the pressure head 6, or the cylindrical surface.

[0045] Of course, in another embodiment, the pressure head 6 can also be driven by a telescopic component such as a cylinder (not shown in the figure) set on the swing frame 2 or the positioning block 3 to realize the action of rotating the pressure head 6 around the first pin 211.

[0046] like Figures 5 to 8 As shown, the positioning block 3 has a first guide groove 34 on one side facing the swing frame 2. The bottom of the first guide groove 34 has a first guide hole 35, which connects to the main V-groove 31. A guide block 7 is installed in the first guide groove 34, and a lifting block 71 is mounted on the guide block 7. The lifting block 71 is slidably embedded in the first guide hole 35. The guide block 7 can move closer to or away from the first guide hole 35 in the first guide groove 34, so that the lifting block 71 can move closer to or away from the welded long rod 4 in the first guide hole 35. After the welded long rod 4 is welded, the guide block 7 moves in the opposite direction of the depth direction of the main V-groove 31, so that the lifting block 71 passes through the first guide hole 35 and approaches the welded long rod 4, until it touches and drives the welded long rod 4 to disengage from the main V-groove 31, for the rapid unloading of the welded long rod 4.

[0047] In some embodiments, to facilitate the rapid reset of the guide block 7, i.e., the lifting block 71, such as... Figure 7 As shown, a return spring 72 is disposed between the guide block 7 and the bottom inner side of the first guide groove 34. It should be noted that during the process of the lifting block 71 lifting the welded long rod 4 away from the main V-groove 31, the return spring 72 is compressed. Therefore, when the force acting on the guide block 7 in the opposite direction along the depth direction of the main V-groove 31 is removed, the guide block 7 quickly returns to its original position under the action of the return spring 72.

[0048] Furthermore, a second guide groove 22 corresponding to and communicating with the first guide groove 34 is provided on one side of the swing frame 2 facing the positioning block 3. A second guide hole 221 is provided through the bottom of the second guide groove 22. A drive pin 8 is slidably embedded in the second guide hole 221. A drive block 81 is disposed at the end of the drive pin 8 near the first guide groove 34. The outer diameter of the drive block 81 is larger than the inner diameter of the second guide hole 221. The drive block 81 can extend from the second guide groove 22 into the first guide groove 34 to drive the guide block 7 to move toward the first guide hole 35. In this embodiment, the second guide hole 221 penetrates the swing frame 2, and the end of the drive pin 8 away from the drive block 81 extends to the outside of the second guide hole 221. In use, the drive pin 8 is driven by external force to drive the lifting block 71 to move. Figure 6 Taking the state shown as an example, a lifting cylinder 9 is installed on the base plate 1. The lifting cylinder 9 corresponds one-to-one with the drive pin 8. When the swing frame 2 is in the position shown, Figure 6 In the state shown, the drive pin 8 and the drive cylinder are directly opposite each other in the longitudinal direction. At this time, the drive cylinder can act on the drive pin 8, causing it to move upward in the longitudinal direction, so as to drive the welded long rod 4 to disengage from the main V-groove 31 through the guide block 7 and the lifting block 71.

[0049] In some embodiments, the sidewall of the elongated rod-like part 41 has an opening (not shown in the figure). During welding, it is necessary to ensure that the opening of the elongated rod-like part 41 is in a circumferential position. At this time, the lifting block 71 is configured to adapt to the shape of the opening. In use, the elongated rod-like part 41 is positioned by embedding the lifting block 71 into the opening, ensuring that the circumferential state of the elongated rod-like part 41 is stable within the main V-groove 31. In this embodiment, the lifting block 71 plays a positioning role. It should be noted that in this embodiment, during the full welding stage, the lifting block 71 needs to be reset to disengage from the opening or the elongated rod-like part 41 to ensure that the elongated rod-like part 41 or the welded long rod 4 can rotate within the main V-groove 31. Furthermore, in this embodiment, the pre-welding is divided into two stages. Specifically, in the first pre-welding stage, the lifting block 71 extends into the opening for positioning, the swing frame 2 maintains its initial state, and the laser beam is projected onto the weld seam 40 for spot welding or partial continuous welding. The circumferential posture of each long cylindrical rod-like part 41 is fixed through pre-welding. In the second pre-welding stage, the lifting block 71 is reset to disengage from the opening, and the swing frame 2 rotates to enable the welded long rod 4 to rotate within a certain angle range, performing large-scale spot welding or partial continuous welding on the weld seam 40. The steps of the second pre-welding stage are the same as those of the pre-welding stage described above, and will not be repeated here.

[0050] In some embodiments, the swing frame 2 has a locking groove 24 on one side facing the positioning block 3 for engaging the positioning block 3. The positioning block 3 is fitted into the locking groove 24 and can be detachably assembled using screws or bolts. When a change of type is required, the positioning block 3 of different specifications can be replaced.

[0051] like Figure 1 and Figure 5 As shown, a limit block 23 is mounted on the swing frame 2. The limit block 23 is arranged opposite to the full welding drive component 5 and is used to limit the welding long rod 4 in the axial direction.

[0052] This embodiment also provides a welding device for welding multiple long cylindrical rod-like parts 41, including a laser welding head and the aforementioned fixture for welding multiple long cylindrical rod-like parts. Based on the aforementioned fixture, this welding device can achieve high-precision welding of multiple long cylindrical rod-like parts 41, realize automatic repositioning of the welded long rods 4, ensure coaxiality, and has high efficiency.

[0053] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A jig for the tailor welding of a multi-segment long round bar type part, characterized by, include: Base plate; The swing frame is rotatably mounted on the base plate; A positioning block is provided on the swing frame. The positioning block has a main V-groove for positioning long cylindrical rod-like parts. The extension direction of the main V-groove is parallel to the axis of rotation of the swing frame relative to the base plate. A pressure head, adjustablely mounted on the swing frame, is used to press long, round rod-like parts located within the main V-groove; The full-welding drive component includes a drive unit and a gripper. The drive unit is disposed on the swing frame, and the gripper is disposed on the drive unit and is driven to rotate by the drive unit. All long cylindrical rod-like parts assembled on the main V-groove constitute the welded long rod. The gripper is located at one end of the welded long rod and is used to grip the welded long rod. The rotation axis of the gripper relative to the drive unit, the welded long rod, and the rotation axis of the swing frame relative to the base plate are coaxial.

2. The fixture for the multi-stage tailor welding of long-elliptical-rod-like parts according to claim 1, characterized in that, The base plate is provided with a first shaft frame and a second shaft frame opposite to each other, and the swing frame is rotatably connected to the first shaft frame and the second shaft frame respectively; The base plate is provided with a first driving member, which is used to drive the swing frame to rotate relative to the first shaft frame and the second shaft frame.

3. The fixture for the multi-stage long circular bar-like part tailor welding according to claim 1, characterized by, The positioning block has a pre-welding notch corresponding to the weld, and the pre-welding notch is connected to the main V-groove.

4. The fixture for the multi-stage long circular bar-like part tailor welding according to claim 3, characterized by, The pre-welded notch extends to the inner side of the main V-groove.

5. The fixture for the multi-stage long circular bar-like part tailor welding according to claim 4, characterized by, The bottom inner side of the main V-groove is defined as the reference plane, and the bottom inner side of the pre-welded notch is defined as the inclined plane, which extends to the reference plane. The end of the inclined plane closest to the reference plane is defined as the proximal end, and the end of the inclined plane furthest from the reference plane is defined as the distal end. In the depth direction of the main V-groove, the distance between the proximal end and the central axis of the welded long rod is less than the distance between the distal end and the central axis of the welded long rod.

6. The fixture for the multi-stage long-elliptical-rod-like part tailor welding according to claim 1, wherein The swing frame is equipped with a hinge seat corresponding to the pressure head. The pressure head is rotatably mounted on the hinge seat. The pressure head can move closer to or away from the main V-groove in a manner that is relative to the hinge seat. The pressure head is equipped with a first magnet, and the positioning block is equipped with a second magnet corresponding to the first magnet. The first magnet and the second magnet attract each other.

7. The fixture for the multi-stage long round bar-like part tailor welding according to claim 6, characterized by, The pressure heads are multiple and spaced apart along the axial direction of the welded long rod; Multiple pressure heads are connected in series via connecting rods.

8. The fixture for the multi-stage tailor welding of long-elliptical bar-like workpieces according to claim 1, characterized in that, The positioning block has a first guide groove on one side facing the swing frame, and a first guide hole is provided at the bottom of the first guide groove, which is connected to the main V-groove. A guide block is assembled in the first guide groove, and a lifting block is disposed on the guide block. The lifting block is slidably embedded in the first guide hole. The guide block can move closer to or further away from the first guide hole within the first guide groove, so that the lifting block can move closer to or further away from the welded long rod within the first guide hole.

9. The fixture for the multi-stage tailor welding of long-elliptical-rod-like parts according to claim 8, characterized in that, A reset spring is disposed between the guide block and the bottom inner side of the first guide groove.

10. The fixture for welding multi-segment long cylindrical rod parts according to claim 8, characterized in that, The swing frame has a second guide groove on one side facing the positioning block, which corresponds to and communicates with the first guide groove. A second guide hole is provided through the bottom of the second guide groove. A driving pin is slidably embedded in the second guide hole. A driving block is arranged at one end of the driving pin near the first guide groove. The outer diameter of the driving block is larger than the inner diameter of the second guide hole. The driving block can extend from the second guide groove into the first guide groove to drive the guide block to move toward the first guide hole.

11. A welding device for welding multiple long cylindrical rod-like parts, characterized in that, Includes a laser welding head and a fixture for welding multiple long cylindrical rod-like parts as described in any one of claims 1-10.

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