An electric arc welding device and method for seat production

Abstract

The application relates to the technical field of welding, and particularly discloses an electric arc welding device and method for seat production, which comprises a workbench, a sliding workbench is slidably arranged on the upper end surface of the workbench, and rotary tables are rotatably arranged on the upper end surface of the workbench and located at the two sides of the sliding workbench; clamping blocks are slidably arranged on the front and back two side edges to the interior of the rotary tables; a bottom plate is attached and arranged on the inner side of the clamping blocks and located on the upper end surface of the rotary tables; and a side plate is attached and arranged on the right side of the bottom plate. The sliding workbench is arranged on the workbench and can slide, the rotary tables are rotatably arranged on the sliding workbench, the clamping blocks are slidably arranged on the rotary tables and used for clamping the bottom plate, the clamping rods and the auxiliary rods are used for clamping the side plate, the mechanical welding arm is arranged on the workbench, and the seat electric arc welding device integrating clamping positioning, position moving, posture adjusting and automatic welding is formed.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and in particular to an arc welding apparatus and method for seat production. Background Technology

[0002] Seats are widely used furniture products in daily life, and their frame structure is usually welded from metal components such as the base plate and side plates. The welding quality of the seat frame directly affects the load-bearing capacity and service life of the seat, therefore, high requirements are placed on welding precision and welding strength. Currently, the arc welding operation in seat production mainly faces the following technical problems.

[0003] First, the welding positioning accuracy is insufficient. Existing welding equipment mostly uses simple clamps or manual fixing to position the seat components. Operators need to manually adjust the placement and welding angle of the components, which is not only inefficient, but also prone to component positioning deviation due to human error, affecting the fit of the weld joint and the consistency of the welding quality.

[0004] Secondly, the clamping adaptability is poor. The specifications and dimensions of seat frame components vary, and the existing clamping structures are mostly fixed designs, which are difficult to be compatible with base plates and side plate components of different sizes. When changing product specifications, it is necessary to frequently change the clamps or readjust them, which restricts the improvement of production efficiency.

[0005] Third, adjusting the welding posture is difficult. The weld seams of the seat frame are complex and need to be welded at different angles and orientations. However, the existing device lacks a flexible posture adjustment mechanism and cannot adjust the spatial orientation of the components in real time according to the weld seam position. As a result, the weld seams in some positions cannot achieve the ideal welding angle, which affects the weld seam formation quality.

[0006] Fourth, the level of automation is low. The clamping, shifting, and flipping auxiliary actions of the existing welding equipment still require manual intervention, which is cumbersome and inefficient, making it difficult to achieve continuous automated operation and restricting the efficiency and quality stability of mass production of seats. Summary of the Invention

[0007] The purpose of this invention is to provide an arc welding apparatus and method for seat production, so as to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: an arc welding device and method for seat production, comprising a worktable, wherein a sliding worktable is slidably disposed on the upper end surface of the worktable, and a rotary table is rotatably mounted on both sides of the sliding worktable up to the upper end surface. Clamping blocks are slidably installed from the front and rear edges of the rotary table to the inside. A base plate is fitted to the inner side of the clamping block and to the upper end face of the rotary table, and a side plate is fitted to the right side of the base plate. A clamping rod is fitted to the upper left side of the side plate, and an auxiliary rod is fitted to the right side of the side plate. The lower end of the auxiliary rod is rotatably mounted with a second telescopic cylinder; Mechanical welding arms are rotatably mounted on the upper end of the workbench and on both sides of the base plate.

[0009] Preferably, support legs are fixedly installed on the left and right sides of the lower end face of the workbench, a U-shaped groove is opened on the right side of the workbench, a first motor is fixedly installed inside the U-shaped groove, a first grooved gear is fixedly installed on the circumferential surface of the output shaft of the first motor, and a first chain is rotatably installed on the circumferential surface of the first grooved gear.

[0010] Preferably, a second grooved gear is rotatably mounted on the other end of the first chain, a threaded rod is fixedly mounted at the center of the left end face of the second grooved gear, a fixed mounting block is rotatably mounted on the circumferential surface of the threaded rod, and the lower end of the fixed mounting block is fixedly mounted on the upper end face of the workbench.

[0011] Preferably, a slide rod is fixedly installed on the upper end face of the worktable and on both sides of the threaded rod. A sliding worktable is slidably installed on the outer side of the slide rod. Threaded holes are opened on the left and right sides of the sliding worktable. The threaded holes are rotatably connected to the adjacent threaded rod. The two sides of the sliding worktable are U-shaped, and symmetrical auxiliary rotating rods are rotatably installed inside the U-shaped structure.

[0012] Preferably, auxiliary shafts are fixedly installed on both the front and rear sides of the upper end of the sliding worktable. A fixed plate is fixedly installed on the middle circumferential surface of the auxiliary shaft. An auxiliary shaft of the same structure is rotatably installed on the upper left and right sides of the fixed plate. A rotary table is rotatably fitted on the inner sides of two adjacent auxiliary shafts. A toothed ring is rotatably fitted on the outer sides of two adjacent auxiliary shafts. The upper ends of the toothed ring are fixedly installed on the lower ends of the rotary table. An arc-shaped groove is formed between the rotary table and the toothed ring. The two ends of the auxiliary shaft slide into the interior of the arc-shaped groove.

[0013] Preferably, each of the upper corners of the sliding worktable is fixedly installed with a vertical pole, and each of the upper outer sides of the vertical pole is rotatably installed with a drive gear. The inner sides of two adjacent drive gears are fixedly installed with a connecting shaft. A grooved wheel is rotatably installed on the outer side of the left vertical pole, and the right side of the grooved wheel is fixedly connected to the adjacent drive gear.

[0014] Preferably, a second motor is fixedly installed on the inner left side of the rotary table, the output shaft of the second motor extends to the left side of the rotary table, a grooved wheel of the same structure is fixedly installed on the circumferential surface of the output shaft of the second motor, and a second chain is rotatably installed on the outer circumferential surface of the grooved wheel on the left side.

[0015] Preferably, the upper surface of the rotary table is provided with parallel limiting grooves. U-shaped rods are fixedly installed on the front and rear edges of the upper end of the rotary table. A fixed connecting block is fixedly installed at the center of the limiting groove. Return springs are fixedly installed at both ends of the fixed connecting block. Slide rods are fixedly installed at the far ends of the two return springs. Clamping blocks are fixedly installed on the upper outer side of each slide rod. Limiting slide rods are rotatably installed on the outer side of each clamping block. Hollow rods are slidably installed on the lower outer side of each limiting slide rod. Hollow rods are rotatably installed on the circumferential surface of the adjacent upper auxiliary shaft. A tightening rope is fixedly installed inside the lower end of each hollow rod. A tightening wheel is fixedly installed at the other end of each tightening rope. A double-headed motor is fixedly installed on the inner side of the two tightening wheels. The double-headed motor is fixedly installed on the upper surface of the sliding worktable.

[0016] Preferably, a U-shaped frame is fixedly installed on the outer right side of the rotary table, and symmetrical support rods are fixedly installed on the inner left side of the U-shaped frame. An auxiliary rod is rotatably installed inside two adjacent support rods. A clamping rod is rotatably installed inside the upper end of each auxiliary rod, and an arc-shaped rod is rotatably installed on the outer side of each clamping rod. A first telescopic cylinder is rotatably installed at the other end of the arc-shaped rod. The first telescopic cylinder is fixedly installed on the inner side of two adjacent auxiliary rods. A round shaft is fixedly installed at the lower end of each auxiliary rod. A drive rod is fixedly installed at one end of the round shaft, and a second telescopic cylinder is rotatably installed at the lower end of the drive rod. The left side of the second telescopic cylinder is fixedly installed on the outer side of the rotary table.

[0017] An arc welding method for seat production, wherein the steps for using the arc welding device for seat production are as follows: Step 1: Loading and Initial Positioning Place the base plate required for seat production on the upper surface of the rotary table and position it inside the front and rear clamping blocks. Then place the side plate on the right side of the base plate, so that the right edge of the side plate and the base plate are in contact with each other and maintain the preset initial welding position. Step 2: Pull the clamping block to slide. At this time, start the double-head motor. The double-head motor drives the tightening wheels at both ends to rotate, unwinding the tightening rope. The tightening rope is driven by the cavity rod and the limit slide rod. With the help of the reset spring, the front and rear clamping blocks slide towards the center in the limit slide groove, thereby firmly clamping the base plate. The second telescopic cylinder is activated, which drives the auxiliary rod to rotate via the drive rod and the round shaft. The auxiliary rod drives the upper clamping rod to move closer to the side plate and clamp it. At the same time, the first telescopic cylinder can be activated, and the clamping angle of the clamping rod can be adjusted via the arc rod to ensure that the side plate and the bottom plate fit tightly and the welding angle is accurate. Step 3: Start the first motor. The first motor drives the threaded rod to rotate through the first grooved gear, the first chain and the second grooved gear. The threaded rod engages with the threaded hole of the sliding worktable, driving the sliding worktable to slide along the slide rod, and moving the clamped base plate and side plate to the optimal working area of ​​the mechanical welding arm. Start the second motor. The second motor drives the drive gear to rotate through the grooved wheel and the second chain. The drive gear meshes with the toothed ring, which in turn causes the rotary table to rotate around the auxiliary shaft, adjusting the spatial posture of the base plate and the side plate so that the gap to be welded is at the angle most conducive to arc welding. Step 4: Arc welding operation. Start the mechanical welding arms on both sides of the worktable to perform arc welding on the joint between the base plate and the side plate. During the welding process, the first motor and the second motor can be controlled in real time according to the direction and position of the weld. The translation position of the sliding worktable and the rotation angle of the rotary table can be finely adjusted to achieve continuous automated welding from multiple angles and all directions. Step 5: After welding is completed, the mechanical welding arm resets. First, control the second and first telescopic cylinders to reset, releasing the clamping rod from the side plate. Then, control the dual-head motor to reverse, allowing the tightening rope to retract. Under this action, the clamping block slides outward to reset, releasing the clamping of the base plate. Finally, the welded seat frame assembly is removed manually or by the robotic arm to complete the unloading. The device then resets to prepare for the next welding cycle.

[0018] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention establishes a seat arc welding device integrating clamping and positioning, position movement, posture adjustment, and automatic welding by setting a sliding worktable on the worktable and rotating a rotary table on the sliding worktable. A sliding clamping block is set on the rotary table to clamp the base plate, and clamping rods and auxiliary rods are used to clamp the side plates. Simultaneously, a mechanical welding arm is set on the worktable. This structure moves the component to be welded to the optimal working area of ​​the welding arm via the sliding worktable, adjusts the welding orientation of the component via the rotary table, and completes the automated welding operation with the mechanical welding arm. This fundamentally solves the problems of low accuracy and poor efficiency caused by manual positioning in existing technologies, realizing fully automated operation of seat components from material loading and positioning to welding completion.

[0019] 2. Building upon automated welding, this invention further utilizes the coordinated operation of a second telescopic cylinder, a drive rod, a round shaft, and an auxiliary rod to drive the clamping rod closer to and clamp the side plate. Simultaneously, the clamping angle of the clamping rod can be adjusted via the first telescopic cylinder and the arc-shaped rod, ensuring a tight fit between the side plate and the base plate and precise welding angles. This clamping structure can adapt to seat components with different outer diameters for centering and clamping. In conjunction with the clamping block clamping structure below the rotary table, it achieves multi-point positioning and clamping, further enhancing the overall stability of the components during welding. While solving the problem of automated welding, it effectively reduces the probability of welding deformation and ensures the welding accuracy of the seat components.

[0020] 3. This invention, through a transmission structure consisting of a first motor, a first grooved gear, a first chain, a second grooved gear, and a threaded rod, drives the sliding worktable to move precisely laterally along the slide rod. Simultaneously, a second motor, a grooved wheel, a second chain, and a drive gear, through meshing with a toothed ring, drive the rotary table to rotate around an auxiliary shaft. This structure allows for pre-setting the travel distance based on the dimensions of the seat component to be welded, ensuring the welding structure precisely stops at the corresponding welding position, avoiding positional deviations caused by manual adjustments. Furthermore, the rotation angle of the component can be adjusted in real-time according to the weld direction, ensuring the weld seam is always at the angle most favorable for arc welding. This effectively solves the problems of difficult welding posture adjustment and the inability to achieve continuous multi-angle welding in the prior art.

[0021] 4. The present invention further improves the overall functionality of the machine through the supporting designs in the subsequent claims. Specifically, the clamping block achieves automatic clamping and releasing / resetting through the cooperation of a dual-head motor, a tightening wheel, a tightening rope, and a return spring, realizing automated control of the base plate clamping; the limiting groove and U-shaped rod on the rotating table limit and guide the sliding of the clamping block, ensuring the stability of the clamping action; auxiliary rotating rods are set in the U-shaped structures on both sides of the sliding worktable, which rotate in conjunction within the arc grooves to ensure the stability of the rotating table during rotation. The various structures cooperate to form a complete automated welding cycle from material loading and positioning, clamping and fixing, transfer and adjustment, posture adjustment, welding operation to unloading, solving the technical problems of low automation and cumbersome processes in the prior art, and effectively improving the efficiency and quality stability of mass production of seats. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a structural diagram of the worktable and sliding worktable of the present invention; Figure 3 This is a structural diagram of the first motor and threaded rod of the present invention; Figure 4 This is a structural diagram of the rotary table and side plate of the present invention; Figure 5 This is a structural diagram of the rotary table and drive gear of the present invention; Figure 6 This is a structural diagram of the sliding worktable and rotary table of the present invention; Figure 7 This is a structural diagram of the auxiliary rod and the first telescopic cylinder of the present invention; Figure 8 This is a structural diagram of the rotary table and dual-head motor of the present invention; Figure 9 This is a structural diagram of the dual-head motor and clamping block of the present invention.

[0024] Explanation of reference numerals in the attached figures: 1. Workbench; 2. Support leg; 201. U-shaped groove; 202. First motor; 203. First grooved gear; 204. First chain; 205. Second grooved gear; 206. Threaded rod; 207. Fixed mounting block; 3. Slide rod; 4. Mechanical welding arm; 5. Sliding worktable; 501. Threaded hole; 502. Auxiliary rotating rod; 503. Upright pole; 504. Drive gear; 505. Connecting shaft; 506. Grooved wheel; 507. Second motor; 508. Auxiliary shaft; 509. Fixing plate; 510. Second chain; 6. Rotary table; 60 1. Gear ring; 602. Arc groove; 603. Limiting slide groove; 604. U-shaped rod; 7. Dual-head motor; 701. Tensioning wheel; 702. Tensioning rope; 703. Hollow rod; 704. Limiting slide rod; 705. Clamping block; 706. Slide rod; 707. Return spring; 708. Fixed connecting block; 8. U-shaped frame; 801. Support rod; 802. Auxiliary rod; 803. Clamping rod; 804. First telescopic cylinder; 805. Arc rod; 806. Second telescopic cylinder; 807. Drive rod; 808. Round shaft; 9. Side plate; 10. Base plate. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please see Figures 1 to 9 The present invention provides a technical solution: An arc welding apparatus and method for seat production includes a worktable 1. Support legs 2 are fixedly installed on the lower left and right sides of the worktable 1 near the edges using screws and nuts. The support legs 2 allow the worktable 1 to remain horizontal, away from the ground. A U-shaped groove 201 is formed on the right side of the worktable 1. A first motor 202 is fixedly installed inside the U-shaped groove 201. A first grooved gear 203 is fixedly installed on the circumference of the output shaft of the first motor 202. A first chain 204 is rotatably installed on the circumference of the first grooved gear 203. A second grooved gear 205 is rotatably installed at the other end of the first chain 204. A threaded rod 206 is fixedly installed at the center of the left side of the second grooved gear 205. A fixing block 207 is rotatably installed on the circumference of the screw 206. The fixing block 207 is fixedly installed at the transverse center of the upper end face of the worktable 1. Figure 1 and Figure 2 As shown.

[0027] Therefore, during use, starting the first motor 202 will drive the first grooved gear 203 on the output shaft to rotate. The first grooved gear 203 drives the first chain 204 to move synchronously through meshing, which in turn drives the second grooved gear 205 to rotate. The threaded rod 206, which is coaxially fixed with the second grooved gear 205, also rotates synchronously. This can drive the subsequent welding structure to complete the position adjustment along the axial direction of the threaded rod, realize the lateral movement of the welding operation point, and adapt to the welding position requirements of different specifications of seat components.

[0028] It should be noted that during use, the rotation of the first motor 202 is precisely controlled by a computer. Thus, the movement stroke can be preset in advance according to the size parameters of the seat component to be welded, driving the welding structure to accurately stop at the corresponding welding position, avoiding positional deviations caused by manual adjustment, and ensuring the consistency of welding accuracy. The other end of the threaded rod 206 is rotatably mounted on the fixed mounting block 207, which is fixed to the upper left side of the worktable 1. It can form a stable support for the suspended end of the threaded rod 206, preventing axial shaking during the rotation of the threaded rod 206 and ensuring the stability of the movement and adjustment.

[0029] A sliding table rod 3 is fixedly installed on the front and back of the upper end of the workbench 1. A sliding worktable 5 is slidably installed on the outer sides of the two sliding table rods 3. Figure 2As shown, mechanical welding arms 4 are rotatably mounted on the outer sides of the front and rear sliding table rods 3 (it should be noted that the mechanical welding arms 4 can perform welding operations in all directions). The left and right sides of the sliding worktable 5 have a U-shaped structure, and auxiliary rotating rods 502 are rotatably mounted inside them. A threaded hole 501 is opened from the left to the right side of the middle position. The threaded hole 501 and the threaded rod 206 are rotatably connected by threads. Figure 2 As shown.

[0030] Therefore, during use, when the threaded rod 206 rotates, it can drive the sliding worktable 5 to move laterally along the axial direction of the threaded rod 206 through the threaded engagement. The sliding worktable 5 will simultaneously slide synchronously along the outer side of the front and rear sliding rods 3, ensuring the overall stability of the sliding worktable 5's movement and avoiding deflection and jamming during the sliding process. This provides a stable bearing base for welding operations. After the seat frame components to be welded are carried on the sliding worktable 5, it can be precisely positioned with the threaded rod 206 to accurately deliver the position to be welded to the working range of the mechanical welding arm 4, completing the arc welding operation at the corresponding position.

[0031] Rotary platforms 6 are provided on both sides and above the sliding worktable 5. Gear rings 601 are fixedly installed on the lower outer sides of both ends of the rotary platform 6. The gear rings 601 and the lower ends of both sides of the rotary platform 6 form an arc-shaped groove 602. An auxiliary rotating rod 502 is rotatably mounted in the arc-shaped groove 602. Figure 5 As shown.

[0032] Secondly, an auxiliary shaft 508 is fixedly installed on the upper surface of the sliding worktable 5 (it should be noted that a circular rotating shaft is nested at both ends of the auxiliary shaft 508, and the rotating shaft is rotatably installed inside the gap between the rotary table 6 and the toothed ring 601, to assist the subsequent rotation of the rotary table 6). A fixing plate 509 is fixedly installed on the middle circumferential surface of the auxiliary shaft 508, and the auxiliary shaft 508 is rotatably installed on the upper end of the fixing plate 509. The two ends of the auxiliary shaft 508 are the same as described above, such as... Figure 5 As shown, secondly, uprights 503 are fixedly installed at the upper corners of the sliding worktable 5. Drive gears 504 are rotatably installed inside the uprights 503. A connecting shaft 505 is fixedly installed in the middle of the two horizontal drive gears 504. A grooved wheel 506 is fixedly installed through the uprights 503 on the outer side of the left drive gear 504. A second motor 507 is fixedly installed on the left side of the inside of the rotary table 6. The output shaft of the second motor 507 extends to the outer side of the rotary table 6, and a grooved wheel 506 with the same structure as described above is fixedly installed on its circumferential surface. Thus, a second chain 510 is rotatably installed on the outer circumferential surface of the three grooved wheels 506 on the left. It should be noted that the second motor 507 is located at the center of the left side of the rotary table 6. Therefore, during subsequent rotation, the second motor 507 will rotate but will not affect the rotation of the second chain 510.

[0033] Therefore, during use, after the second motor 507 starts, it drives the grooved wheel 506 at the end of its output shaft to rotate. The grooved wheel 506 drives the other two grooved wheels 506 to rotate synchronously through the second chain 510, which in turn drives the connecting shaft 505 and the two drive gears 504 to rotate synchronously.

[0034] The drive gear 504 meshes with the toothed ring 601, which can drive the toothed ring 601 and the rotary table 6 to rotate around the auxiliary shaft 508, causing the seat component fixed on the rotary table 6 to rotate synchronously. The welding orientation of the component can be adjusted without manual flipping, which makes it easier for the mechanical welding arm 4 to complete the welding operation on different orientations of the component, reducing the time loss of manual adjustment and improving the overall efficiency of the welding operation.

[0035] Meanwhile, the auxiliary rotating rod 502 rotates and engages within the arc-shaped groove 602, and the rotating shaft at the end of the auxiliary shaft 508 also provides rotational support for the rotary table 6, which can ensure the stability of the rotary table 6 during rotation and avoid shaking that could affect welding accuracy.

[0036] The upper end of the rotary table 6 is provided with a parallel limiting slide groove 603. A fixed connecting block 708 is fixedly installed at the center of the limiting slide groove 603. A return spring 707 is fixedly installed at both ends of the fixed connecting block 708. A slide rod 706 is fixedly installed on the outer side of the return spring 707. The slide rod 706 is slidably installed inside the limiting slide groove 603. A clamping block 705 is fixedly installed on the upper outer side of the slide rod 706. A double-headed rod, calculated by calculation, is rotatably installed on the outer side of the clamping block 705. A limiting slide rod 704 is rotatably installed on the outer side of the double-headed rod. A cavity rod 703 is slidably installed on the outer side of the lower end of the limiting slide rod 704. The inner bottom surface of the cavity rod 703 and the lower end of the limiting slide rod 704 are fixedly connected by a strong telescopic rod.

[0037] Furthermore, U-shaped rods 604 are fixedly installed on the front and rear edges of the upper end of the rotary table 6. The U-shaped rods 604 are used to limit the sliding of the clamping block 705 to prevent it from tilting up.

[0038] Secondly, a dual-head motor 7 is fixedly installed at the center of the upper surface of the sliding worktable 5. Tensioning wheels 701 are fixedly installed on the output shafts at both ends of the dual-head motor 7. It should be noted that each of the left and right tensioning wheels 701 has two grooves on its circumference, and a staggered tensioning rope 702 is fixedly installed inside the groove. The ends of the tensioning ropes 702 that are furthest apart are fixedly connected to the lower end of the adjacent hollow rod 703. Figure 9 As shown.

[0039] Therefore, during use, after the dual-head motor 7 starts, it drives the tensioning wheel 701 of the output shafts at both ends to rotate. The tensioning wheel 701 gradually winds the tensioning rope 702 into its own groove, pulling the hollow rods 703 on both sides to rotate.

[0040] At the same time, the cavity rod 703 will drive the limiting slide rod 704 to rotate synchronously. The limiting slide rod 704, through the rotatably connected double-headed rod, will slide the clamping block 705. The clamping block 705 will also slide the slide rod 706 inside the limiting slide groove 603. During the sliding process, the return spring 707 will be stretched. After the base plate 10 is placed on the upper surface of the rotary table 6, the double-headed motor 7 will perform reverse operation. At this time, the return spring 707 will slide the slide rod 706, thereby clamping the side of the base plate 10 with the clamping block 705.

[0041] like Figure 7 As shown, a U-shaped frame 8 is fixedly installed on the outer right side of the rotary table 6. Eight support rods 801 are fixedly installed on the inner side of the U-shaped frame 8. The support rods 801 are arranged in pairs, and auxiliary rods 802 are rotatably installed inside the two adjacent support rods 801. A first telescopic cylinder 804 is fixedly installed inside the right end of the two adjacent auxiliary rods 802. An arc-shaped rod 805 is rotatably installed on the telescopic rod of the first telescopic cylinder 804. A clamping rod 803 is rotatably installed at the other end of the arc-shaped rod 805. One end of the clamping rod 803 is rotatably installed inside the upper end of the two adjacent auxiliary rods 802. A round shaft 808 is fixedly installed at the lower end of the auxiliary rods 802. A drive rod 807 is fixedly installed on the outer front end of the round shaft 808. A second telescopic cylinder 806 is rotatably installed on the inner lower end of the drive rod 807. One end of the second telescopic cylinder 806 is rotatably installed on the outer side of the rotary table 6.

[0042] A side plate 9 is fitted to the left side of the auxiliary rod 802, such as... Figure 7 As shown, during use, after the second telescopic cylinder 806 is started, it drives the drive rod 807 to deflect through the telescopic rod, which in turn drives the round shaft 808 to rotate, causing the four sets of auxiliary rods 802 to retract towards the center position as a whole, which can be used in conjunction with the action of the first telescopic cylinder 804 to initially adjust the clamping position.

[0043] When the seat component to be welded is placed between the four sets of clamping rods 803, the telescopic rod of the first telescopic cylinder 804 extends and pushes the arc rod 805 to deflect. The arc rod 805 drives the clamping rod 803 at the other end to rotate towards the center of the component, thereby limiting the side plate 9 component and preventing the component from moving axially during the welding process.

[0044] This structure can be adapted to seat tubular components with different outer diameters to complete centering and clamping. It works in conjunction with the clamping structure below the rotary table 6 to achieve multi-point positioning and clamping of long seat components, further improving the overall stability of the components during welding operations, reducing the probability of welding deformation, and ensuring the welding accuracy of the seat components.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An arc welding apparatus for seat production, comprising a worktable (1), characterized in that: A sliding worktable (5) is slidably provided on the upper end surface of the worktable (1), and a rotary table (6) is rotatably installed on both sides of the sliding worktable (5) up to the upper end surface. Clamping blocks (705) are slidably installed from the front and rear edges to the inside of the rotary table (6). A base plate (10) is attached to the inner side of the clamping block (705) and the upper end face of the rotating table (6), and a side plate (9) is attached to the right side of the base plate (10). A clamping rod (803) is attached to the upper left side of the side plate (9), and an auxiliary rod (802) is attached to the right side of the side plate (9). The lower end of the auxiliary rod (802) is rotatably mounted with a second telescopic cylinder (806). Mechanical welding arms (4) are rotatably mounted on the upper end of the workbench (1) and on both sides of the base plate (10).

2. The arc welding apparatus for seat production according to claim 1, characterized in that: Support legs (2) are fixedly installed on the left and right sides of the lower end face of the workbench (1). A U-shaped groove (201) is opened on the right side of the workbench (1). A first motor (202) is fixedly installed inside the U-shaped groove (201). A first grooved gear (203) is fixedly installed on the circumferential surface of the output shaft of the first motor (202). A first chain (204) is rotatably installed on the circumferential surface of the first grooved gear (203).

3. The arc welding apparatus for seat production according to claim 2, characterized in that: The second grooved gear (205) is rotatably mounted on the other end of the first chain (204). A threaded rod (206) is fixedly mounted at the center of the left end face of the second grooved gear (205). A fixed mounting block (207) is rotatably mounted on the circumferential surface of the threaded rod (206). The lower end of the fixed mounting block (207) is fixedly mounted on the upper end face of the workbench (1).

4. The arc welding apparatus for seat production according to claim 1, characterized in that: A slide rod (3) is fixedly installed on the upper end face of the worktable (1) and on both sides of the threaded rod (206). A sliding worktable (5) is slidably installed on the outer side of the slide rod (3). A threaded hole (501) is opened on the left side to the right side of the sliding worktable (5). The threaded hole (501) and the adjacent threaded rod (206) are threadedly rotatably connected. The two sides of the sliding worktable (5) are U-shaped, and symmetrical auxiliary rotating rods (502) are rotatably installed inside the U-shaped structure.

5. The arc welding apparatus for seat production according to claim 4, characterized in that: Auxiliary shafts (508) are fixedly installed on both the front and rear sides of the upper end of the sliding worktable (5). A fixing plate (509) is fixedly installed on the middle circumferential surface of the auxiliary shaft (508). An auxiliary shaft (508) of the same structure is rotatably installed on the upper left and right sides of the fixing plate (509). A rotary table (6) is rotatably fitted on the inner side of two adjacent auxiliary shafts (508). A toothed ring (601) is rotatably fitted on the outer side of two adjacent auxiliary shafts (508). The two ends of the upper end of the toothed ring (601) are fixedly installed on the lower part of the two ends of the rotary table (6). An arc groove (602) is formed between the rotary table (6) and the toothed ring (601). The two ends of the auxiliary shaft (508) slide into the interior of the arc groove (602).

6. The arc welding apparatus for seat production according to claim 5, characterized in that: A vertical rod (503) is fixedly installed at the upper corner of the sliding worktable (5). A drive gear (504) is rotatably installed on the outer side of the upper end of the vertical rod (503). A connecting shaft (505) is fixedly installed on the inner side of two adjacent drive gears (504) in the lateral direction. A grooved wheel (506) is rotatably installed on the outer side of the left vertical rod (503). The right side of the grooved wheel (506) is fixedly connected to the adjacent drive gear (504).

7. The arc welding apparatus for seat production according to claim 6, characterized in that: A second motor (507) is fixedly installed on the inner left side of the rotary table (6). The output shaft of the second motor (507) extends to the left side of the rotary table (6). A grooved wheel (506) with the same structure is fixedly installed on the circumferential surface of the output shaft of the second motor (507). A second chain (510) is rotatably installed on the outer circumferential surface of the grooved wheel (506) on the left side.

8. The arc welding apparatus for seat production according to claim 1, characterized in that: The upper surface of the rotary table (6) is provided with a parallel limiting groove (603). U-shaped rods (604) are fixedly installed on the front and rear edges of the upper end of the rotary table (6). A fixed connecting block (708) is fixedly installed at the center of the limiting groove (603). Return springs (707) are fixedly installed at both ends of the fixed connecting block (708). A sliding rod (706) is fixedly installed at the far end of the two return springs (707). A clamping block (705) is fixedly installed on the upper outer side of each sliding rod (706). A limiting slide rod (704) is rotatably installed on the outer side of the limiting slide rod (704). A cavity rod (703) is slidably installed on the outer side of the lower end of the limiting slide rod (704). The cavity rod (703) is rotatably installed on the circumferential surface of the upper adjacent auxiliary shaft (508). A tightening rope (702) is fixedly installed inside the lower end of the cavity rod (703). A tightening wheel (701) is fixedly installed on the other end of the tightening rope (702). A double-headed motor (7) is fixedly installed on the inner side of the two tightening wheels (701). The double-headed motor (7) is fixedly installed on the upper surface of the sliding worktable (5).

9. The arc welding apparatus for seat production according to claim 1, characterized in that: A U-shaped frame (8) is fixedly installed on the outer side of the right end of the rotary table (6). A symmetrical support rod (801) is fixedly installed on the inner side of the left side of the U-shaped frame (8). An auxiliary rod (802) is rotatably installed inside the two adjacent support rods (801). A clamping rod (803) is rotatably installed inside the upper end of the auxiliary rod (802). An arc rod (805) is rotatably installed on the outer side of the clamping rod (803). A first telescopic cylinder (804) is rotatably installed at the other end of the arc rod (805). The first telescopic cylinder (804) is fixedly installed on the inner side of the two adjacent auxiliary rods (802). A round shaft (808) is fixedly installed at the lower end of the auxiliary rods (802). A drive rod (807) is fixedly installed at one end of the round shaft (808). A second telescopic cylinder (806) is rotatably installed at the lower end of the drive rod (807). The left side of the second telescopic cylinder (806) is fixedly installed on the outer side of the rotary table (6).

10. An arc welding method for seat production, comprising an arc welding apparatus for seat production according to any one of claims 1-9, characterized in that: The steps of the electric arc welding method for seat production are as follows: Step 1: Loading and initial positioning Place the base plate (10) required for seat production on the upper surface of the rotary table (6) and position it inside the front and rear clamping blocks (705). Then place the side plate (9) on the right side of the base plate (10) so that the right edge of the side plate (9) and the base plate (10) are in contact with each other and maintain the preset initial welding position. Step 2: Pull the clamping block (705) to slide. At this time, start the double-head motor (7). The double-head motor (7) drives the tightening wheels (701) at both ends to rotate, and unwinds the tightening rope (702). The tightening rope (702) is driven by the cavity rod (703) and the limiting slide rod (704). With the help of the reset spring (707), the two clamping blocks (705) slide towards the center in the limiting slide groove (603), thereby firmly clamping the base plate (10). Start the second telescopic cylinder (806). The second telescopic cylinder (806) pushes the auxiliary rod (802) to rotate through the drive rod (807) and the round shaft (808). The auxiliary rod (802) drives the upper clamping rod (803) to move closer to the side plate (9) and clamp it. At the same time, the first telescopic cylinder (804) can be started. The clamping angle of the clamping rod (803) can be adjusted through the arc rod (805) to ensure that the side plate (9) and the bottom plate (10) fit tightly and the welding angle is accurate. Step 3: Start the first motor (202). The first motor (202) drives the threaded rod (206) to rotate through the first grooved gear (203), the first chain (204) and the second grooved gear (205). The threaded rod (206) engages with the threaded hole (501) of the sliding worktable (5) to drive the sliding worktable (5) to slide along the slide rod (3) and move the clamped base plate (10) and side plate (9) to the optimal working area of ​​the mechanical welding arm (4). Start the second motor (507). The second motor (507) drives the drive gear (504) to rotate through the grooved wheel (506) and the second chain (510). The drive gear (504) meshes with the toothed ring (601), thereby causing the rotary table (6) to rotate around the auxiliary shaft (508) and adjust the spatial posture of the base plate (10) and the side plate (9) so that the gap to be welded is at the angle most conducive to arc welding. Step 4: Arc welding operation. Start the mechanical welding arms (4) on both sides of the worktable (1) to perform arc welding on the joint between the base plate (10) and the side plate (9). During the welding process, the first motor (202) and the second motor (507) can be controlled in real time according to the direction and position of the weld. The translation position of the sliding worktable (5) and the rotation angle of the rotary table (6) can be finely adjusted to achieve continuous automated welding from multiple angles and all directions. Step 5: After welding is completed, the mechanical welding arm (4) is reset. First, the second telescopic cylinder (806) and the first telescopic cylinder (804) are reset to release the clamping rod (803) from the side plate (9). Then, the dual-head motor (7) is reversed to retract the tightening rope (702). The clamping block (705) slides outward to reset under the action, releasing the clamping on the bottom plate (10). Finally, the welded seat frame assembly is removed by manual or mechanical arm to complete the unloading. The device is reset to prepare for the next welding cycle.

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