A welding positioning tool for an antihelix

Abstract

The utility model discloses a kind of ear welding positioning tool, including support, rotary disc, measurement structure and limit rod, rotary disc is rotationally arranged in the mounting plate of support, the positioning mechanism for installing flange is provided on rotary disc, the index adjusting structure for adjusting the rotary index of rotary disc is provided on mounting plate;Measurement structure includes angle gauge, which is arranged on mounting plate around rotary disc, and indicating member, which is arranged on rotary disc and points to angle gauge, the intersection of limit rod and the outer periphery of rotary disc forms the limiting area for positioning ear workpiece, ear workpiece is placed close to limit rod for positioning welding, the ear welding positioning tool of the present technical scheme realizes the accurate positioning control of the installation angle and position of ear workpiece by the combined design of rotary disc, limit rod and index adjusting structure, reduces artificial dependence, adapts multi-specification flange, improves welding precision, efficiency and product consistency.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary tooling technology for support ears, specifically to a welding and positioning tooling for support ears. Background Technology

[0002] A bellows compensator is a widely used compensating element in industrial piping systems. Its main function is to absorb axial, lateral, and angular displacements of the pipeline caused by temperature changes, mechanical vibrations, or installation errors through the elastic deformation of the bellows. A typical bellows compensator structure mainly includes components such as bellows, flanges, tie rods, and lugs. The tie rods connect and adjust the bellows through the flanges at both ends, while the lugs, as key components connecting the tie rods and flanges, are usually welded to the outer circumferential sidewall of the flange.

[0003] In actual manufacturing, the number and arrangement of the lugs depend on the configuration of the tie rod. Common specifications include two-lug, three-lug, four-lug, and six-lug configurations. These lugs need to be evenly distributed along the outer circumference of the flange to ensure balanced stress on the tie rod and overall structural stability of the compensator. Currently, lug welding largely relies on manual operation. Operators need to perform angle positioning and welding on the outer circle of the flange according to design requirements. However, when facing multiple lugs and high-precision arrangement requirements, the following problems still exist: angular deviations are easily generated during manual marking and positioning, making it difficult to guarantee the accuracy of angle distribution. This results in uneven distribution of multiple lugs on the outer circle of the flange, which in turn affects the stress state of the tie rod after installation and may even cause uneven loading of the bellows, reducing the service life and safety of the compensator. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the problem that in the prior art, the lugs rely on manual operation to perform angle positioning and welding on the outer circle of the flange. During the manual marking and positioning process, angle deviations are easily generated, resulting in uneven distribution of multiple lugs on the outer circle of the flange.

[0005] To solve the above-mentioned technical problems, this utility model provides a welding and positioning fixture for the support lug, including... The bracket is equipped with a mounting plate; A rotating disk is rotatably mounted on a mounting plate of the bracket. The rotating disk is provided with a positioning mechanism for mounting flanges. The mounting plate is provided with an indexing adjustment structure connected to the rotating disk. The indexing adjustment structure is used to adjust the rotation index of the rotating disk. The measuring structure includes an angle scale mounted on a mounting plate surrounding the rotating disk, and an indicator mounted on the rotating disk and pointing to the angle scale; A limiting rod is set on the angle ruler along the axial direction perpendicular to the rotating disk to limit the contact lug workpiece. The intersection of the limiting rod and the outer periphery of the rotating disk forms a limiting area for positioning the lug workpiece.

[0006] In the aforementioned lug welding positioning fixture, the rotating disk includes an upper rotating disk and a lower rotating disk arranged opposite each other, and a plurality of connecting columns fixedly connected between the lower rotating disk and the upper rotating disk. The lower rotating disk is rotatably disposed in the receiving groove formed by the mounting plate. The flange is installed on the upper rotating disk through a positioning mechanism. The angle gauge is arranged around the outside of the upper rotating disk.

[0007] In the aforementioned bracket welding and positioning fixture, the mounting plate is provided with a disc structure forming a receiving groove. The indexing adjustment structure includes an indexer set at the bottom of the disc structure and a plurality of indexing grooves equidistantly arranged at the bottom of the lower turntable along the circumferential direction. The indexer has an elastic positioning element that passes through the disc structure and moves between the plurality of indexing grooves. Under the action of its elastic force, the elastic positioning element cooperates with the indexing grooves to realize the rotation indexing and positioning of the turntable.

[0008] In the aforementioned bracket welding positioning fixture, at least one indexing hole is provided between the indexer and the disc structure. The elastic positioning component includes an indexing spring and an indexing pin or indexing ball disposed in at least one indexing hole. When the rotating disk rotates at a certain angle relative to the disc structure, the indexing pin or indexing ball protrudes partially from the indexing hole under the action of the indexing spring and engages in positioning contact in the indexing groove at the bottom of the rotating disk.

[0009] In the aforementioned bracket welding positioning fixture, an adjusting plug is provided at the end of the indexing hole away from the indexing pin or indexing ball. The adjusting plug is threadedly connected to the indexing hole to press or release the indexing spring, thereby adjusting the elastic pressure on the indexing pin or indexing ball.

[0010] In the aforementioned bracket welding positioning fixture, the bottom of the lower turntable is concentrically provided with two groups of indexing grooves. The multiple indexing grooves of the two groups are evenly distributed along the circumference, and the equal division angles between the multiple indexing grooves of different groups are different.

[0011] In the aforementioned bracket welding positioning fixture, the indexer includes two sets of spaced-apart indexing holes and elastic positioning elements. The positions of the two sets of elastic positioning elements correspond to the two sets of indexing grooves at the bottom of the lower turntable, with the equal division angle of one set of indexing grooves set to 90° and the equal division angle of the other set of indexing grooves set to 60°.

[0012] In the aforementioned support ear welding positioning fixture, the outer peripheral sidewall of the lower turntable is provided with an annular groove, and the outer peripheral sidewall of the disc structure is provided with multiple radial holes that communicate with the annular groove. A rolling assembly that makes rolling contact with the disc structure is provided between the multiple radial holes and the annular groove.

[0013] In the aforementioned bracket welding positioning fixture, the rolling assembly includes a ball disposed in a radial hole and in contact with an annular groove, and a limiting stud threaded in the radial hole to form a limiting fit with the ball.

[0014] In the aforementioned bracket welding positioning fixture, the positioning mechanism includes two positioning seats fixed between the lower turntable and the upper turntable, a lead screw rotatably connected between the two positioning seats, and at least one transmission block threadedly connected to the lead screw rotatable. The upper turntable extends along the length of the lead screw rotatable and is provided with an adjusting slide hole. The transmission block is fitted into the adjusting slide hole and is provided with a fixing hole for fixing the connecting flange.

[0015] Compared with the prior art, the technical solution of this utility model has the following advantages: 1. In the flange welding positioning fixture provided by this utility model, a rotating disk is rotatably mounted on a mounting plate and is equipped with a positioning mechanism for mounting flanges. The positioning mechanism ensures that the flange's installation position is fixed, preventing displacement during adjustment and welding, thus improving operational safety and consistency. By setting an indexing adjustment structure between the rotating disk and the mounting plate, the rotation angle of the rotating disk can be precisely controlled to achieve indexing positioning, ensuring controllable angle accuracy of flange rotation. When multiple flanges need to be evenly distributed, each indexing of the rotating disk is a preset precise angle, which replaces manual marking and eliminates subjective errors. Operators can directly observe the angle scale corresponding to the indicator to confirm the current rotation angle of the flange to ensure positioning accuracy, and the limit rod can be used to... The intersection with the outer circumference of the rotating disk forms a limiting area for positioning the lug workpiece. The lug workpiece is placed close to the limiting rod for positioning welding. After each lug workpiece is welded, the flange is rotated by the same preset angle to perform the welding operation on the next lug workpiece. This ensures that multiple lug workpieces are evenly distributed on the outer circle of the flange at a preset angle. The lug welding positioning fixture using this technology achieves precise positioning control of the installation angle and position of the lug workpiece through the combined design of the rotating disk, limiting rod and indexing adjustment structure. This reduces reliance on manual labor, significantly reduces the positioning time of a single lug, is adaptable to multiple flange specifications, improves the versatility of the fixture, effectively solves the problem of uneven lug distribution in the prior art, and improves welding accuracy, efficiency and product consistency.

[0016] 2. In the welding and positioning fixture for the support lugs provided by this utility model, the indexing adjustment structure includes an indexer set at the bottom of the disc structure and several indexing grooves equidistantly set at the bottom of the lower turntable along the circumferential direction. The spacing of the indexing grooves directly determines the indexing angle. This indexer achieves the rotation indexing and positioning of the turntable through elastic contact between the elastic positioning element and the indexing groove. The elastic positioning element consists of an indexing spring and an indexing steel ball. When the turntable rotates, the indexing steel ball will be pressed tightly against the bottom of the lower turntable under the elastic force of the indexing spring. When it rotates to the position of the indexing groove, it will automatically slide into the groove and lock in place. There is no need to use additional tools such as wrenches or screwdrivers to lock it. A single person can complete the indexing adjustment. The spring of this elastic positioning element will continuously provide axial elastic force, so that the pin / steel ball is always tightly locked in the indexing groove to achieve the positioning effect, avoiding the loosening caused by slight vibration of the turntable, and ensuring that the indexing angle of the turntable is accurate and stable.

[0017] 3. In the welding and positioning fixture for the support lugs provided by this utility model, an annular groove is provided on the outer peripheral side wall of the lower turntable, and a ball bearing that is in contact with the annular groove is provided in the radial hole of the outer peripheral side wall of the disc structure. The cooperation between the ball bearing and the annular groove transforms the traditional sliding friction into rolling friction. The operator only needs a small force to easily rotate the turntable, which is comfortable to handle and easy to make fine adjustments. This achieves a stable and low-resistance precise rotation of the turntable, which helps to eliminate radial sway.

[0018] 4. In the lug welding positioning fixture provided by this utility model, the positioning mechanism includes two positioning seats fixed between the lower turntable and the upper turntable. A lead screw is rotatably connected between the two positioning seats. The transmission block is threadedly connected to the lead screw to form a lead screw drive. An adjustment sliding hole that cooperates with the transmission block is provided on the upper turntable. The advantage of this structural design is that when the lead screw is rotated, the transmission block will move synchronously along the length of the lead screw. The position of the transmission block in the adjustment sliding hole can be freely adjusted. The fixing hole on the transmission block is used to connect the flange. By adjusting the position of the two transmission blocks, the distance between the two fixing holes can be changed, thereby accommodating flanges of various diameters and various fixing hole positions. This positioning mechanism adopts a structure design of lead screw drive and sliding hole guidance. The lead screw drive ensures the displacement accuracy, and the adjustment sliding hole limits the offset of the transmission block, ensuring that the two transmission blocks always move along the same axis. This ensures the coaxiality of the flange with the turntable after it is fixed, laying a benchmark for the accurate angle of subsequent lug welding. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the welding and positioning fixture for the support lugs provided by this utility model; Figure 2 A cross-sectional structural schematic diagram of the welding and positioning fixture for the support lugs provided by this utility model; Figure 3 This is a schematic diagram of the split structure of the rotating disk of this utility model; Figure 4 This is a schematic diagram of the structure of the lower turntable of this utility model, which is provided with two sets of indexing grooves.

[0021] Explanation of reference numerals in the attached drawings: 1. Bracket; 11. Mounting plate; 12. Disc structure; 13. Radial hole; 2. Rotating disc; 21. Upper disc; 22. Lower disc; 23. Connecting column; 24. Indicator; 3. Angle gauge; 4. Limiting rod; 5. Positioning mechanism; 51. Positioning seat; 52. Lead screw; 53. Transmission block; 54. Adjusting slide hole; 6. Indexing adjustment structure; 61. Indexer; 62. Indexing spring; 63. Indexing ball; 64. Adjusting plug; 65. Indexing groove; 71. Annular groove; 72. Ball bearing; 73. Limiting stud; 8. Flange; 9. Support lug. Detailed Implementation

[0022] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] In the description of this utility model, it should be noted that the terms "first", "second" and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0026] Example The following is a detailed description of this embodiment with reference to the accompanying drawings: This embodiment provides, as follows: Figure 1-4 The illustrated fixture for welding and positioning lugs includes a support 1, a rotating disk 2, a measuring structure, and a limiting rod 4. The support 1 has a mounting plate 11. The rotating disk 2 is rotatably mounted on the mounting plate 11 of the support 1. The rotating disk has a positioning mechanism 5 for mounting a flange 8. The mounting plate 11 has an indexing adjustment structure 6 connected to the rotating disk 2, which adjusts the rotational index of the rotating disk 2. The measuring structure includes an angle gauge 3 surrounding the rotating disk 2 and mounted on the mounting plate 11, and an indicator 24 (an arrow pointing towards the angle gauge 3) mounted on the rotating disk 2. The limiting rod 4 is mounted on the angle gauge along an axial direction perpendicular to the rotating disk 2 to limit contact with the lug workpiece 9. The intersection of the limiting rod 4 and the outer periphery of the rotating disk 2 forms a limiting area for positioning the lug workpiece 9. This limiting rod can be moved and adjusted on the angle gauge to accommodate lug workpieces of different widths.

[0027] The above-described implementation method is the core technical solution of this embodiment. A positioning mechanism 5 is provided on the rotating disk 2 for installing the flange 8. The positioning mechanism 5 ensures the flange's installation position is fixed, preventing displacement during adjustment and welding, thus improving operational safety and consistency. By setting an indexing adjustment structure 6 between the rotating disk 2 and the mounting plate 11, the rotation angle of the rotating disk 2 can be precisely controlled, achieving indexing positioning and ensuring controllable flange rotation angle accuracy. If multiple lugs need to be evenly distributed, each indexing of the rotating disk corresponds to a preset precise angle, replacing manual marking and eliminating subjective errors. Operators can directly observe the angle scale corresponding to the indicator 24 to confirm the current flange rotation angle to ensure positioning accuracy, and the limit rod 4... The intersection of the outer periphery of the rotating disk 2 forms a limiting area for positioning the lug workpiece 9. The lug workpiece is placed close to the limiting rod for positioning welding. After each lug workpiece is welded, the flange is rotated by the same preset angle to perform the welding operation of the next lug workpiece, thereby ensuring that multiple lug workpieces are evenly distributed on the outer circle of the flange at a preset angle. The lug welding positioning fixture of this technical solution achieves precise positioning control of the installation angle and position of the lug workpiece through the combined design of the rotating disk, limiting rod and indexing adjustment structure, reducing manual dependence, greatly reducing the positioning time of a single lug, adapting to multiple flange specifications, improving the versatility of the fixture, effectively solving the problem of uneven distribution of lugs in the prior art, and improving welding accuracy, efficiency and product consistency.

[0028] The following is combined Figure 1-4 The specific setup of the rotating disk is explained in detail: The rotating disk 2 includes an upper rotating disk 21 and a lower rotating disk 22 arranged opposite each other, and a plurality of connecting posts 23 fixedly connected between the lower rotating disk 22 and the upper rotating disk 21. The lower rotating disk 22 is rotatably disposed in the receiving groove formed by the mounting plate 11. The flange 8 is mounted on the upper rotating disk 21 by a positioning mechanism 5. The angle gauge 3 is arranged around the outside of the upper rotating disk 21. The mounting plate 11 is provided with a disc structure 12 forming the receiving groove. The upper and lower rotating disks are rigidly connected by the plurality of connecting posts 23 to form a sturdy rotating disk frame. The receiving groove formed by the disc structure 12 will wrap around the bottom or edge of the lower rotating disk 22, which is equivalent to providing an annular guide for the lower rotating disk. The track restricts its radial displacement, ensuring that the rotating disk always rotates around the same axis, avoiding indexing angle deviation caused by eccentric rotation; more preferably, the positioning mechanism 5 includes two positioning seats 51 fixed between the lower rotating disk 22 and the upper rotating disk 21, a lead screw 52 rotatably connected between the two positioning seats 51, and at least one transmission block 53 threadedly connected to the lead screw 52. The upper rotating disk 21 is provided with an adjusting slide hole 54 extending along the length direction of the lead screw 52. The adjusting slide hole 54 passes through the axis of the upper rotating disk 21. The transmission block 53 is fitted into the adjusting slide hole 54 and is provided with a fixing hole for fixing the connecting flange 8. The advantage of this structural design is that when the lead screw 52 is rotated, the transmission block 53 moves synchronously along the length of the lead screw. The position of the transmission block 53 in the adjusting slide hole 54 can be freely adjusted. The fixing hole on the transmission block 53 is used to connect the flange 8. The flange is fixed by bolts passing through it and fastening it in the fixing hole. By adjusting the position of the two transmission blocks, the distance between the two fixing holes can be changed, thus making it compatible with flanges of various diameters and fixing hole positions. This positioning mechanism adopts a structure design of lead screw drive and slide hole guidance. The lead screw drive ensures the displacement accuracy, and the adjusting slide hole limits the offset of the transmission blocks, ensuring that the two transmission blocks always move along the same axis. This ensures the coaxiality of the flange with the adjusting rotating disk after it is fixed, laying a benchmark for the accurate angle of subsequent lug welding.

[0029] like Figure 2The indexing adjustment structure 6 includes an indexer 61 disposed at the bottom of the disc structure 12, and a plurality of indexing grooves 65 equidistantly disposed at the bottom of the lower turntable 22 along the circumferential direction. The indexer 61 has an elastic positioning member that passes through the disc structure 12 and moves between the plurality of indexing grooves 65. The elastic positioning member cooperates with the indexing grooves 65 under the action of its elastic force to realize the rotation indexing and positioning of the turntable 2. Further preferably, at least one indexing hole is provided through the indexer 61 and the disc structure 12, and the elastic positioning member includes a component disposed in the at least one indexing hole. In this embodiment, the indexing spring 62 and the indexing ball 63 or the indexing pin are preferably used together. When the rotating disk 2 rotates at a certain angle relative to the disk structure 12, the indexing pin or the indexing ball 63 protrudes out of the indexing hole under the action of the indexing spring 62 and is positioned in the indexing groove 65 at the bottom of the lower rotating disk. An adjusting plug 64 is provided at the end of the indexing hole away from the indexing ball 63. The adjusting plug 64 is threaded to the indexing hole to tighten or loosen the indexing spring 62, thereby adjusting the elastic pressure on the indexing pin or the indexing ball 63. In this structural configuration, the indexer 61 achieves the rotational indexing and positioning of the rotating disk through the elastic contact between the elastic positioning element and the indexing groove 65. When the rotating disk 2 is rotated, the indexing steel ball 63 will be pressed tightly against the bottom of the lower rotating disk 22 under the elastic force of the indexing spring 62. When it rotates to the position of the indexing groove 65, it will automatically slide into the groove and lock in place. There is no need to use additional tools such as wrenches or screwdrivers to lock it in place. A single person can complete the indexing adjustment. The spring of this elastic positioning element will continuously provide axial elastic force, so that the indexing steel ball is tightly locked in the indexing groove to achieve the positioning effect, avoiding the loosening of the rotating disk caused by slight vibration, and ensuring that the indexing angle of the rotating disk is accurate and stable.

[0030] In actual production, the commonly used number of lugs is mainly 2, 3, 4, and 6, and they are evenly distributed on the outer circle of the flange. Therefore, two sets of indexing grooves 65 with different equal division angles are designed to adapt to the above-mentioned common angles, so as to achieve the purpose of not needing to replace the rotating disk. The specific setting is as follows: The bottom of the lower rotating disk 22 is concentrically provided with two sets of indexing grooves. Each set of indexing grooves includes multiple indexing grooves 65 evenly distributed along the circumference. The multiple indexing grooves 65 in these two sets are evenly distributed along the circumference, and the equal division angles between the multiple indexing grooves 65 in different sets are different. The indexer 61 includes two sets of indexing holes and elastic positioning elements. The positions of the two sets of elastic positioning elements correspond to the two sets of indexing grooves at the bottom of the lower rotating disk. Specifically, the equal division angle of one set of indexing grooves is set to 90°, and the equal division angle of the other set of indexing grooves is set to 60°. This two sets of indexing grooves 65 are integrated on the bottom of the same rotating disk, which can meet the indexing requirements of the above-mentioned mainstream number of lugs without replacing the rotating disk, and greatly improve the scene adaptability of the tooling. In use, the indexing device 61 selects only one set of elastic positioning elements and one set of indexing grooves to adjust the number of lugs to be welded. For example, to meet the welding scenarios of 2 and 4 lugs, the operator can select an indexing groove group with an equal division angle of 90°, providing 4 indexing positioning points. That is, the rotating disk 2 drives the flange to rotate one division of 90°, which allows the user to quickly and significantly switch positions within a large angle range. To meet the welding scenarios of 3 and 6 lugs, the operator can select an indexing groove group with an equal division angle of 60°, providing 6 indexing positioning points. That is, the rotating disk 2 drives the flange to rotate one division of 60°, providing more precise angle adjustment capability. This embodiment is designed to achieve rapid switching of the indexing angle by using two sets of elastic positioning elements corresponding to two sets of indexing grooves 65, thereby improving batch production efficiency. Obviously, to adapt to the distribution requirements of other numbers of lugs, other sets of indexing grooves with equal division angles can also be designed.

[0031] To achieve smooth, stable, and precise rotation adjustment of the turntable, and to ensure long-term stability and accuracy, combined with... Figure 2-3As shown, the lower turntable 22 has an annular groove 71 on its outer peripheral sidewall. The outer peripheral sidewall of the disc structure 12 has multiple radial holes 13 that communicate with the annular groove 71. Rolling components that roll in contact with the annular groove 71 are provided in the multiple radial holes 13. Specifically, the rolling components include balls 72 that are disposed in the radial holes 13 and contact the annular groove 71, and a limiting stud 73 that is threaded in the radial holes 13 and forms a limiting fit with the balls 72. After the limiting stud 73 is screwed into the radial holes 13, its end will press against the balls 72. By adjusting the screw insertion depth, a preload can be applied to the balls 72, forcing all balls 72 to tightly contact the sidewall of the annular groove 71. The advantages of this design are as follows: First, multiple balls 72 are evenly distributed along the circumference in multiple radial holes 13, forming a stable and reliable radial support system. The annular groove 71 provides a precise and continuous circular track for the balls 72, ensuring that the balls always roll within the annular groove. This limits the axial displacement of the lower turntable 22, preventing the turntable from moving up and down and improving the stability and coaxiality of the turntable rotation. Second, when the turntable 2 rotates, the balls 72 roll within the annular groove 71. The interaction between the balls 72 and the annular groove 71 transforms traditional sliding friction into rolling friction. The operator only needs a small amount of force to easily rotate the turntable, providing a comfortable feel and facilitating fine adjustments. This achieves stable, low-resistance, and precise rotation of the turntable. Furthermore, after the turntable 2 completes the corresponding angle adjustment, the indexing steel balls of the indexer elastically abut against the corresponding indexing groove for automatic positioning.

[0032] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A welding and positioning fixture for a support lug, characterized in that, include The bracket (1) is equipped with a mounting plate (11); A rotating disk (2) is rotatably mounted on a mounting plate (11) of the bracket (1). The rotating disk is provided with a positioning mechanism (5) for mounting a flange (8). The mounting plate (11) is provided with an indexing adjustment structure (6) connected to the rotating disk (2). The indexing adjustment structure (6) is used to adjust the rotation index of the rotating disk (2). The measuring structure includes an angle ruler (3) mounted on a mounting plate (11) around the rotating disk (2), and an indicator (24) mounted on the rotating disk (2) and pointing to the angle ruler (3); A limiting rod (4) is set on the angle ruler along the axial direction perpendicular to the rotating disk (2) to limit the contact lug workpiece (9). The intersection of the limiting rod (4) and the outer periphery of the rotating disk (2) forms a limiting area for positioning the lug workpiece (9).

2. The welding and positioning fixture for the support lugs according to claim 1, characterized in that: The rotating disk (2) includes an upper rotating disk (21) and a lower rotating disk (22) arranged opposite to each other, and a plurality of connecting columns (23) fixedly connected between the lower rotating disk (22) and the upper rotating disk (21). The lower rotating disk (22) is rotatably arranged in the receiving groove formed by the mounting plate (11). The flange (8) is installed on the upper rotating disk (21) through a positioning mechanism (5). The angle ruler (3) is arranged around the outside of the upper rotating disk (21).

3. The welding and positioning fixture for the support lugs according to claim 2, characterized in that: The mounting plate (11) is provided with a disc structure (12) forming a receiving groove. The indexing adjustment structure (6) includes an indexer (61) disposed at the bottom of the disc structure (12) and a plurality of indexing grooves (65) equidistantly disposed at the bottom of the lower turntable (22) along the circumferential direction. The indexer (61) has an elastic positioning member that passes through the disc structure (12) and moves between the plurality of indexing grooves (65). The elastic positioning member cooperates with the indexing grooves (65) under the action of its elastic force to realize the rotation indexing and positioning of the turntable (2).

4. The welding and positioning fixture for the support lugs according to claim 3, characterized in that: At least one indexing hole is provided between the indexer (61) and the disc structure (12). The elastic positioning element includes an indexing spring (62) and an indexing pin or indexing ball (63) disposed in at least one indexing hole. When the rotating disk (2) rotates at a certain angle relative to the disc structure (12), the indexing pin or indexing ball (63) protrudes partially from the indexing hole under the action of the indexing spring (62) and makes positioning contact in the indexing groove (65) at the bottom of the rotating disk.

5. The welding and positioning fixture for the support lugs according to claim 4, characterized in that: An adjusting plug (64) is provided at one end of the indexing hole away from the indexing pin or indexing ball (63). The adjusting plug (64) is threadedly connected to the indexing hole to press or release the indexing spring (62), thereby adjusting the elastic pressure on the indexing pin or indexing ball (63).

6. The welding and positioning fixture for the support lugs according to any one of claims 3-5, characterized in that: The bottom of the lower turntable (22) is concentrically provided with two groups of indexing grooves. The multiple indexing grooves (65) of the two groups are evenly distributed along the circumference, and the equidistant angles between the multiple indexing grooves (65) of different groups are different.

7. The welding and positioning fixture for the support lugs according to claim 6, characterized in that: The indexer (61) includes two sets of indexing holes and elastic positioning elements arranged at intervals. The positions of the two sets of elastic positioning elements correspond to the two sets of indexing grooves at the bottom of the lower turntable, respectively. The equal division angle of one set of indexing grooves is set to 90°, and the equal division angle of the other set of indexing grooves is set to 60°.

8. The welding and positioning fixture for the support lugs according to claim 7, characterized in that: The lower turntable (22) has an annular groove (71) on its outer peripheral sidewall. The outer peripheral sidewall of the disc structure (12) has multiple radial holes (13) that communicate with the annular groove (71). A rolling assembly that makes rolling contact with the disc structure (12) is provided between the multiple radial holes (13) and the annular groove (71).

9. The welding and positioning fixture for the support lugs according to claim 8, characterized in that: The rolling assembly includes a ball (72) disposed in a radial hole (13) and in contact with an annular groove (71), and a limiting stud (73) threaded in the radial hole (13) and forming a limiting fit with the ball (72).

10. The welding and positioning fixture for the support lugs according to claim 7, 8, or 9, characterized in that: The positioning mechanism (5) includes two positioning seats (51) fixed between the lower turntable (22) and the upper turntable (21), a lead screw (52) rotatably connected between the two positioning seats (51), and at least one transmission block (53) threadedly connected to the lead screw (52). The upper turntable (21) is provided with an adjusting slide hole (54) extending along the length direction of the lead screw (52). The transmission block (53) is fitted into the adjusting slide hole (54) and is provided with a fixing hole for fixing the connecting flange (8).

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