A single-leg welding fixture for chairs

Abstract

This utility model discloses a single-leg welding fixture for chairs, comprising: a worktable, an end stop, two second side baffles, two top-feeding assemblies, and a pressing mechanism. The worktable has a first side baffle, with a first welding station and a second welding station on each side. The end stop is located at the end of the first side baffle. The two second side baffles are respectively positioned at the first and second welding stations, used to position one end of the corresponding single-leg chair. The two top-feeding assemblies are respectively positioned at the first and second welding stations, each top-feeding assembly including a base, a driving cylinder on the base, and a top-feeding plate at the end of the extension rod of the driving cylinder. The top-feeding plate is used to press the welding end of the corresponding single-leg chair. The pressing mechanism is located on the worktable and is used to press the single-leg chair. The single-leg chair welding fixture provided by this utility model achieves rapid positioning and stable pressing of the single-leg chair, improving clamping efficiency.

Description

Technical Field

[0001] This utility model relates to the field of chair welding technology, and in particular to a welding fixture for a single chair leg. Background Technology

[0002] In the chair manufacturing industry, the chair leg is a crucial component of the chair frame, typically using square tubing as the base material. One type of chair leg is... Figure 6 As shown, the processing steps are as follows: First, at one end of the square tube a1, triangular notches a2 are cut out on the corresponding two side walls using laser cutting technology; then, the side wall a3 between the two triangular notches a2 is re-welded to the square tube a1 body using welding technology, finally forming a chair leg with a sloping structure.

[0003] Chair legs assembled from these individual legs, with their unique sloping design, exhibit distinctive design features and visual appeal, making them highly popular in the market. However, in the welding process of these individual legs, existing technologies commonly use vises to clamp and fix both sides of the welding position. Specifically, this involves clamping the square tube a1 body and the side wall a3 between the two triangular notches. This clamping method requires manual adjustment and tightening of the vise each time, making the operation cumbersome and inefficient. Furthermore, the individual legs are prone to uneven placement during clamping, which affects welding accuracy and product quality.

[0004] It is evident that existing technologies still need improvement and enhancement. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a single-leg welding fixture for chairs, which aims to solve the technical problems of low clamping efficiency and uneven placement of single-leg chairs in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A single-leg welding fixture for a chair includes:

[0008] The workbench is equipped with a first side baffle, and a first welding station and a second welding station are respectively located on both sides of the first side baffle; the first welding station is used to place an unwelded chair leg; the second welding station is used to place a chair leg that has been welded on one side.

[0009] An end stop, located at the end of the first side panel, is used to position the ends of the two chair legs.

[0010] Two second side baffles are respectively set on the first welding station and the second welding station, and are used to position one end of the corresponding chair leg.

[0011] Two top-feeding components are respectively set on the first welding station and the second welding station. Each top-feeding component includes a base, a drive cylinder set on the base, and a top-feeding plate set at the end of the extension rod of the drive cylinder. The top-feeding plate is used to press the welding end of the corresponding chair leg.

[0012] The pressing mechanism, located on the workbench, is used to press down on the chair legs at the first and second welding stations.

[0013] Furthermore, the workbench is provided with first screw holes spaced apart along the length of the first side baffle; the end block has an L-shaped structure with a first waist hole, and a first screw that is slidably connected to any of the first screw holes is provided on the first waist hole.

[0014] Furthermore, the workbench is provided with two sets of symmetrically arranged hole groups, each hole group including several second screw holes arranged in a matrix; the second side baffle has an L-shaped structure, on which a second waist hole is provided, and a second screw that is slidably connected to any second screw hole is provided on the second waist hole.

[0015] Furthermore, the workbench is provided with third screw holes spaced apart along the length of the first side baffle; the base is provided with positioning holes and arc-shaped grooves concentric with the positioning holes, the positioning holes are provided with third screws that are screwed into the corresponding third screw holes, and the arc-shaped grooves are slidably connected with fourth screws that are screwed into the corresponding third screw holes.

[0016] Furthermore, the end of the extension rod of the drive cylinder is connected to an adjustment plate, and two symmetrically arranged adjustment screws are screwed onto the adjustment plate. The ends of the two adjustment screws are respectively rotatably connected to the top plate.

[0017] Furthermore, the bottom of the top plate is provided with a vertically extending T-shaped groove; the end of the adjusting screw is provided with a cylindrical limiting plate, which can rotate around the axis of the adjusting screw in the T-shaped groove and slide along the length of the T-shaped groove.

[0018] Furthermore, it also includes a material inspection sensor located at the first welding station, which is used to detect the welding end of the chair leg at the first welding station.

[0019] Furthermore, the first side baffle is composed of multiple short plates arranged at intervals; the pressing mechanism includes a height adjustment rod, a height adjustment nut, and a pressure rod. The height adjustment rod is located between two short plates, and the height adjustment nut is threadedly connected to the height adjustment rod. The height adjustment nut is provided with a smooth rod section, and the middle part of the pressure rod is rotatably located on the smooth rod section and can move along the axial direction of the smooth rod section. When the pressure rod rotates to the upper surface of the chair leg, it can press the chair leg.

[0020] Furthermore, the lower surfaces at both ends of the pressure rod are provided with arc surfaces, and a rubber layer is attached to the arc surfaces.

[0021] Beneficial effects:

[0022] This utility model provides a single-leg welding fixture for chairs. Through multiple positioning and fixing methods, including the cooperation of the first and second side baffles, the cooperation of the top material assembly and the first side baffle, the positioning of the end block, and the pressing mechanism, the single chair leg can be accurately and stably positioned, ensuring that the single chair leg is placed flat on the worktable and guaranteeing the fit quality of the welding parts, thereby improving the welding effect. The setting of two welding stations allows the unwelded single chair leg to be flipped and placed into the second welding station after one-sided welding at the first welding station for secondary welding. This realizes the welding operation of two stations in one clamping action, with high clamping efficiency, meeting the processing requirements of single chair legs. Attached Figure Description

[0023] Figure 1 Structural diagram of the single-leg welding fixture for chair provided by this utility model;

[0024] Figure 2 A schematic diagram illustrating the use of the single-leg welding fixture for chairs provided in this utility model;

[0025] Figure 3 Structural diagram of the top material assembly in the single-leg welding fixture for chair provided by this utility model;

[0026] Figure 4 Top view of the top material assembly in the single-leg welding fixture for chair provided by this utility model;

[0027] Figure 5 The structural diagram of the pressing mechanism in the single-leg welding fixture for the chair provided by this utility model;

[0028] Figure 6 A schematic diagram showing the chair leg before and after welding.

[0029] Reference numerals: Workbench 1, First welding station 11, Second welding station 12, First screw hole 13, First screw 131, Second screw hole 14, Second screw 141, Third screw hole 15, Third screw 151, Fourth screw 152, First side baffle 2, End block 3, First waist hole 31, Second side baffle 4, Second waist hole 41, Top material assembly 5, Base 51, Positioning hole 511, Arc groove 512, Drive cylinder 52, Top material plate 53, T-slot 531, Clearance hole 532, Adjustment plate 54, Adjustment screw 55, Limiting plate 551, Pressing mechanism 6, Height adjustment rod 61, Height adjustment nut 62, Smooth rod section 621, Limiting part 622, Pressing rod 63, Arc surface 631, Inspection sensor 7, Square tube a1, Triangular notch a2, Side wall a3. Detailed Implementation

[0030] This utility model provides a welding fixture for a single leg of a chair. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0031] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, 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 a specific orientational structure and operation. Therefore, they should not be construed as limitations on this utility model. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0032] Please see Figures 1 to 5 As shown, this utility model provides a single-leg chair welding fixture, including: a worktable 1, an end stop 3, two second side baffles 4, two top-loading components 5, and a pressing mechanism 6. The worktable 1 is provided with a first side baffle 2, and a first welding station 11 and a second welding station 12 are respectively provided on both sides of the first side baffle 2; the first welding station 11 is used to place the unwelded single-leg chair; the second welding station 12 is used to place the single-leg chair that has been welded on one side; the end stop 3 is provided at the end of the first side baffle 2 and is used to position the two single-leg chairs at the end; the two second side baffles 4... The first welding station 11 and the second welding station 12 are respectively located on the first welding station 11 and the second welding station 12, and are respectively used to position one end of the corresponding chair leg; the two top material components 5 are respectively located on the first welding station 11 and the second welding station 12, and each top material component 5 includes a base 51, a drive cylinder 52 located on the base 51, and a top material plate 53 located at the end of the extension rod of the drive cylinder 52. The top material plate 53 is used to press the welding end of the corresponding chair leg; the pressing mechanism 6 is located on the worktable 1 and is used to press the chair leg on the first welding station 11 and the second welding station 12.

[0033] The first side baffle 2 and the second side baffle 4 are used to position the end of the chair leg that does not need to be welded. The top material assembly 5 and the first side baffle 2 are used to position the end of the chair leg that needs to be welded. The end block 3 positions the end of the two chair legs. The pressing mechanism 6 presses the two chair legs from top to bottom to ensure that the chair legs are placed flat on the worktable 1 and are positioned stably.

[0034] During the initial welding, the unwelded chair leg is correctly placed on the first welding station 11, with the side wall between the two triangular notches on the chair leg facing the top plate 53 on the station. Then, the extension rod of the drive cylinder 52 on the station extends, driving the top plate 53 to move towards the chair leg, pressing the side wall against the chair leg. Finally, the side wall is fixed to the upper surface of the chair leg by welding. After welding is completed, the extension rod of the drive cylinder 52 on the station retracts, driving the top plate 53 back to its original position, and the chair leg has completed one welding operation.

[0035] During the secondary welding, the chair leg at the first welding station 11 is rotated 180° towards the second welding station 12, ensuring that the chair leg, having completed the first welding, is accurately placed on the second welding station 12. At this point, the lower surface of the original chair leg is flipped upwards. The extension rod of the drive cylinder 52 on the second welding station 12 extends, driving the top plate 53 to move towards the chair leg, pressing the side wall against the chair leg. Finally, welding is used to fix the side wall to the lower surface of the original chair leg. After welding is completed, the extension rod of the drive cylinder 52 on this station retracts, driving the top plate 53 back to its original position, completing the secondary welding of the chair leg. Simultaneously, a new, unwelded chair leg can be placed in the first welding station 11 for the initial welding operation.

[0036] Since the chair leg is laser-cut to form two triangular notches, the side wall between the two triangular notches will bend outward due to heat. By driving the cylinder 52 to push the top plate 53 forward to press the welding position, the fit quality between the side wall and the chair leg can be guaranteed, thereby ensuring the welding quality.

[0037] To improve welding efficiency, a welding robot (not shown in the attached diagram) can be used to automatically weld the chair leg. The robot can sequentially complete the automatic welding of the chair leg at the first welding station 11 and the second welding station 12 in a single positioning operation. Optionally, the welding robot can be an OTC FD-V25H.

[0038] Compared to existing technologies, this chair single-leg welding fixture achieves rapid positioning and stable clamping of the chair single leg through the cooperation of various components, eliminating the need for frequent manual adjustment of the clamping position and significantly improving clamping efficiency. At the same time, it can effectively ensure that the chair single leg is placed flat, avoiding the impact of placement problems on welding accuracy. Combined with the precise clamping of the top material component 5 at the welding position, it further improves the welding quality. Moreover, the two welding stations can perform welding operations at different stages simultaneously, which is conducive to improving the overall processing efficiency.

[0039] In a preferred embodiment, see [reference] Figure 1The workbench 1 is provided with first screw holes 13 spaced apart along the length of the first side baffle 2; the end block 3 has an L-shaped structure and a first waist hole 31 is provided on it. A first screw 131 that is slidably connected to any of the first screw holes 13 is screwed onto the first waist hole 31. When dealing with chair legs of different lengths, a suitable first screw hole 13 is selected and screwed onto the first screw 131. The end block 3 slides along the length of the first side baffle 2. At this time, the first waist hole 31 moves relative to the first screw 131. When the end block 3 is adjusted to a suitable position, so that the welding position of the chair leg is exactly centered on the top plate 53, the first screw 131 is tightened. The first screw 131 is fixed by screwing onto the corresponding first screw hole 13, thus completing the position locking of the end block 3. The above settings can accommodate chair legs of different lengths, ensuring that the welding position of the chair leg is centered on the top plate 53, making the clamping force of the top plate 53 on the welding end more uniform, further improving the positioning accuracy during welding, ensuring the stability of welding quality, and enhancing the adaptability of the tooling to chair legs of different specifications, thus expanding the applicability of the tooling.

[0040] Preferably, two first screws 131 are provided to improve the stability of the end stop 3 during installation.

[0041] In a preferred embodiment, see [reference] Figure 1 The workbench 1 has two sets of symmetrically arranged hole groups, each including a matrix of second screw holes 14. The second side baffle 4 has an L-shaped structure and a second waist hole 41. A second screw 141, which is slidably connected to any of the second screw holes 14, is connected to the second waist hole 41. When it is necessary to adapt to chair legs of different diameters and lengths, a suitable second screw hole 14 is selected and screwed to the second screw 141, so that the second side baffle 4 is located in the middle of the section of the chair leg that does not need to be welded. According to the diameter of the chair leg, the second side baffle 4 is moved on the corresponding second screw hole 14, that is, the second waist hole 41 slides relative to the second screw 141. At this time, the second side baffle 4 is translated perpendicular to the direction of the first side baffle 2. After the distance between the first side baffle 2 and the second side baffle 4 is adjusted to the width of the chair leg, the second screw 141 is tightened to lock the position of the second side baffle 4. Through the above settings, chair legs of different diameters and lengths can be adapted to ensure that the second side baffle 4 and the first side baffle 2 can stably position the end of the chair leg that does not need to be welded.

[0042] Preferably, two second screws 141 are provided to improve the stability of the installation of the second side baffle 4.

[0043] In a preferred embodiment, see [reference] Figure 1The workbench 1 is provided with third screw holes 15 spaced apart along the length of the first side baffle 2; the base 51 is provided with positioning holes 511 and arc-shaped grooves 512 concentrically arranged with the positioning holes 511. Specifically, the radial distance between the arc-shaped grooves 512 and the positioning holes 511 is a multiple of the distance between two adjacent third screw holes 15, where the multiple is a natural number; the positioning holes 511 are provided with third screws 151 that are screwed into the corresponding third screw holes 15, and the arc-shaped grooves 512 are slidably connected with fourth screws 152 that are screwed into the corresponding third screw holes 15. When the overall position of the top material assembly 5 needs to be adjusted, the positioning hole 511 is installed into the corresponding third screw hole 15 and fixed with the third screw 151, and the fourth screw 152 is screwed into the corresponding third screw hole 15 to adjust the overall position of the top material assembly 5, ensuring that the top material plate 53 can act on the side wall between the two triangular notches of the chair leg; then, according to the inclination of the upper slope of the chair leg, the rotation of the base 51 around the third screw 151 is finely adjusted, and at the same time, the fourth screw 152 slides along the arc groove 512 to keep the top material plate 53 parallel to the slope of the chair leg, ensuring that after the extension rod of the drive cylinder 52 extends, the top material plate 53 is tightly attached to the side wall; after the base 51 is adjusted into place, the third screw 151 and the fourth screw 152 are tightened.

[0044] With the above settings, the overall position of the top material assembly 5 can be flexibly adjusted to ensure that the top material plate 53 always acts on the side wall to be welded, and the top material plate 53 is in close contact with the side wall, which can avoid welding defects caused by poor contact, further improve welding quality, and enhance the adaptability of the tooling to chair legs with different slope angles, making it widely applicable.

[0045] Further, see Figure 3 , 4 The extension rod of the drive cylinder 52 is connected to an adjustment plate 54. Two symmetrically arranged adjustment screws 55 are screwed onto the adjustment plate 54, and the ends of the two adjustment screws 55 are rotatably connected to the top plate 53. To adjust the position of the top plate 53 when pressing against the chair leg, the extension rod of the drive cylinder 52 extends a certain length to push the top plate 53 a large distance, bringing it closer to the side wall of the chair leg. Then, the two symmetrically arranged adjustment screws 55 are rotated synchronously. Utilizing the screwed connection between the adjustment screws 55 and the adjustment plate 54, the adjustment screws 55 move along their own axis, thereby driving the top plate 53 to make fine adjustments until the top plate 53 precisely acts on the side wall of the chair leg. When the extension rod of the drive cylinder 52 remains extended, the top plate 53 stably presses against the side wall. By utilizing the above settings and the fine-tuning function of the adjusting screw 55, the difficulty of precisely adjusting the extension length of the drive cylinder 52 is reduced, ensuring that the top plate 53 accurately acts on the side wall after the drive cylinder 52 extends, thus guaranteeing the reliability and stability of the clamping.

[0046] Optionally, the drive cylinder 52 is a double-rod cylinder with a magnetic switch. By adjusting the position of the magnetic switch on the cylinder body of the double-rod cylinder, the extension length of the extension rod of the double-rod cylinder can be quickly adjusted. At the same time, the double-rod cylinder has self-guiding characteristics to ensure that the top plate 53 moves stably along the axial direction of the extension rod.

[0047] Furthermore, see Figure 3 , 4 The bottom of the top plate 53 is provided with a vertically extending T-shaped groove 531; the end of the adjusting screw 55 is provided with a cylindrical limiting plate 551, which can rotate around the axis of the adjusting screw 55 within the T-shaped groove 531 and slide along the length of the T-shaped groove 531, that is, the diameter of the limiting plate 551 matches the width of the inner cavity of the T-shaped groove 531. The cooperation between the cylindrical limiting plate 551 and the T-shaped groove 531 realizes the rotational connection between the adjusting screw 55 and the top plate 53, ensuring that when the adjusting screw 55 rotates, the top plate 53 only performs axial translation and does not rotate with it, ensuring the stability of fine adjustment operation; at the same time, by pulling the top plate 53 upward, the top plate 53 can be separated from the adjusting screw 55, which facilitates the replacement of top plates 53 of different heights according to the thickness of the chair leg, ensuring that the height of the top plate 53 is not higher than the thickness of the chair leg, and avoiding the welding of the side wall and the surface of the chair leg due to the top plate 53 being too high.

[0048] Similarly, the height of the first side baffle 2 and the second side baffle 4 is lower than the thickness of a single leg of the chair to avoid positional interference between the first side baffle 2 and the second side baffle and the pressing mechanism 6.

[0049] In a preferred embodiment, see [reference] Figure 1 , 2 3 and 4 also include a material inspection sensor 7 located on the first welding station 11. The material inspection sensor 7 is used to detect the welded end of the chair leg on the first welding station 11. Specifically, the material inspection sensor 7 is located on the adjustment plate 54, and the top plate 53 on the station has a clearance hole 532 corresponding to the position of the material inspection sensor 7. The clearance hole 532 provides a path for the detection light or detection signal of the material inspection sensor 7, so that the material inspection sensor 7 can smoothly detect the welded end of the chair leg. The material inspection sensor 7 determines the placement status of the chair leg by detecting the position of the sidewall between the two triangular notches: when the sidewall is detected, it indicates that the unwelded chair leg has been correctly placed on the first welding station 11, and subsequent clamping and welding operations can proceed normally; when the sidewall is not detected, it indicates that the chair leg is not correctly positioned, or that the chair leg is not placed on the first welding station 11. In this case, subsequent welding operations need to be stopped. Combined with the automatic welding operation of the welding robot, this avoids invalid welding caused by incorrect placement of the chair leg or lack of material, reduces the idle running wear of the welding robot and the generation of welding defects, and improves the accuracy and reliability of welding operations.

[0050] Among them, the material inspection sensor 7 adopts a proximity switch. How the proximity switch detects the position of the side wall and feeds the signal back to the welding robot is existing technology, and its specific working principle will not be elaborated here.

[0051] In a preferred embodiment, see [reference] Figure 5 The first side baffle 2 is composed of multiple short plates arranged at intervals. The pressing mechanism 6 includes a height adjustment rod 61, a height adjustment nut 62, and a pressure rod 63. The height adjustment rod 61 is located between two short plates. The height adjustment nut 62 is threadedly connected to the height adjustment rod 61. The height adjustment nut 62 has a smooth rod section 621. The middle part of the pressure rod 63 is rotatably located on the smooth rod section 621 and can move along the axial direction of the smooth rod section 621. When the pressure rod 63 rotates to the upper surface of the chair leg, it can press the chair leg. Specifically, the upper and lower ends of the smooth rod section 621 are provided with limiting parts 622 to limit the vertical movement distance of the pressure rod 63. Through the screw connection between the height adjustment nut 62 and the height adjustment rod 61, the position of the height adjustment nut 62 on the height adjustment rod 61 can be adjusted, thereby adjusting the initial height of the pressure rod 63. When it is necessary to press down a single chair leg, rotate both ends of the pressure rod 63 to above the chair leg on each of the two workstations. At this time, the pressure rod 63 moves upward along the smooth rod section 621 and abuts against the limiting part 622 above the smooth rod section 621. Under the blocking action of the limiting part 622, the pressure rod 63 cannot move further upward, thus generating downward pressure to firmly press the chair leg onto the worktable 1, ensuring that the chair leg will not wobble or shift during the welding process. The downward pressing action of the chair leg is convenient to operate and can quickly achieve the pressing and releasing of the chair leg.

[0052] Preferably, the height adjustment nut 62 is a wing nut, which is convenient for manual tightening of the height adjustment nut 62.

[0053] Further, see Figure 5 The lower surfaces at both ends of the pressure rod 63 are provided with arc surfaces 631. During the contact process between the pressure rod 63 and the upper surface of the chair leg, the arc surfaces 631 can guide the pressure rod 63 to climb upward more smoothly, reducing the jamming and resistance at the moment of contact, making the pressing operation more labor-saving. A rubber layer is attached to the arc surface 631. This rubber layer increases the friction between the pressure rod 63 and the chair leg, preventing the pressure rod 63 from easily coming off the upper surface of the chair leg during the pressing process. It can also play a buffering role, preventing the pressure rod 63 from causing squeezing damage to the surface of the chair leg.

[0054] In summary, this utility model sets up a first welding station 11 for placing unwelded chair legs and a second welding station 12 for placing single-sided welding on the workbench 1. After the unwelded chair leg is welded on one side at the first welding station 11, it is rotated 180° and placed in the second welding station 12, thus completing two single-sided welding operations. During operation, the first side baffle 2 and the second side baffle 4 cooperate to position the end of the chair leg that does not need to be welded, the top material assembly 5 cooperates with the first side baffle 2 to position the end of the chair leg that needs to be welded, the end stop block 3 positions the end of the chair leg, and the pressing mechanism 6 presses the chair leg from top to bottom to ensure that the chair leg is placed flat and positioned stably. The material inspection sensor 7 on the first welding station 11 can detect whether the chair leg is correctly placed to prevent misplacement. Combined with the automatic welding operation of the welding robot, single-sided welding of two stations can be completed in one clamping operation. It enables rapid positioning and stable clamping of chair legs, improving clamping and processing efficiency and ensuring welding accuracy and quality; moreover, each component is adjustable to accommodate chair legs of different specifications, making it widely applicable.

[0055] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this utility model, and all such substitutions or changes should fall within the protection scope of the appended claims of this utility model.

Claims

1. A chair single leg welding tool, characterized by, include: The workbench (1) is provided with a first side baffle (2), and a first welding station (11) and a second welding station (12) are provided on both sides of the first side baffle (2); the first welding station (11) is used to place the unwelded chair leg; the second welding station (12) is used to place the chair leg that has been welded on one side. End stop (3) is provided at the end of the first side baffle (2) and is used to position the two chair legs at the ends; Two second side baffles (4) are respectively set on the first welding station (11) and the second welding station (12), and are used to position one end of the corresponding chair leg; Two top-feeding components (5) are respectively set on the first welding station (11) and the second welding station (12). Each top-feeding component (5) includes a base (51), a drive cylinder (52) set on the base (51), and a top-feeding plate (53) set at the end of the extension rod of the drive cylinder (52). The top-feeding plate (53) is used to press the welding end of the corresponding chair leg. The pressing mechanism (6) is located on the workbench (1) and is used to press the chair leg on the first welding station (11) and the second welding station (12).

2. The chair single leg welding tooling of claim 1, wherein, The workbench (1) is provided with first screw holes (13) spaced apart along the length of the first side baffle (2); the end block (3) has an L-shaped structure and a first waist hole (31) is provided on it, and a first screw (131) is slidably connected to the first waist hole (31) and screwed into any first screw hole (13).

3. The chair single leg welding tooling of claim 1, wherein, The workbench (1) is provided with two sets of symmetrically arranged holes, each set including several second screw holes (14) arranged in a matrix; the second side baffle (4) has an L-shaped structure and a second waist hole (41) is provided on it, and a second screw (141) is slidably connected to the second waist hole (41) and screwed into any second screw hole (14).

4. The chair single leg welding fixture of claim 1, wherein, The workbench (1) is provided with third screw holes (15) spaced apart along the length of the first side baffle (2); the base (51) is provided with positioning holes (511) and arc grooves (512) concentric with the positioning holes (511). The positioning holes (511) are provided with third screws (151) that are screwed into the corresponding third screw holes (15), and the arc grooves (512) are slidably connected with fourth screws (152) that are screwed into the corresponding third screw holes (15).

5. The chair single leg welding fixture of claim 1, wherein, The extension rod end of the drive cylinder (52) is connected to an adjustment plate (54), and two symmetrically arranged adjustment screws (55) are screwed onto the adjustment plate (54). The ends of the two adjustment screws (55) are respectively rotatably connected to the top plate (53).

6. The chair single leg welding tooling of claim 5, wherein, The bottom of the top plate (53) is provided with a vertically extending T-shaped groove (531); the end of the adjusting screw (55) is provided with a cylindrical limiting plate (551), which can rotate around the axis of the adjusting screw (55) in the T-shaped groove (531) and slide along the length of the T-shaped groove (531).

7. The chair single-leg welding fixture according to claim 1, characterized in that, It also includes a material inspection sensor (7) located at the first welding station (11), which is used to detect the welding end of the chair leg at the first welding station (11).

8. The chair single leg welding fixture of claim 1, wherein, The first side baffle (2) is composed of a number of short plates arranged at intervals; the pressing mechanism (6) includes a height adjustment rod (61), a height adjustment nut (62) and a pressure rod (63). The height adjustment rod (61) is located between two short plates. The height adjustment nut (62) is threadedly connected to the height adjustment rod (61). The height adjustment nut (62) is provided with a smooth rod section (621). The middle part of the pressure rod (63) is rotatably located on the smooth rod section (621) and can move along the axial direction of the smooth rod section (621). When the pressure rod (63) rotates to the upper surface of the chair leg, it can press the chair leg.

9. The chair single leg welding fixture of claim 8, wherein, The lower surfaces at both ends of the pressure bar (63) are provided with arc surfaces (631), and a rubber layer is attached to the arc surfaces (631).

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