Automobile non-circular pipe welding workbench

Abstract

The application discloses a kind of automobile non-circular pipe welding workbench, including base, sliding seat, positioning assembly, pressing mechanism and welding mechanism, wherein, the base is opened with sliding slot, two sliding seats are oppositely arranged in the sliding slot, each sliding seat is fixed with telescopic rod one, the output end of telescopic rod one is fixed with fixed disc, the fixed disc is fixed with support disc, the support disc is rotatably installed with rotary table, four telescopic rods two are evenly fixed on the rotary table in circumferential direction, the telescopic direction of telescopic rod two is towards the radial direction of rotary table, the output end of each telescopic rod two is fixed with pressing mechanism, the side of rotary table away from support disc is vertically fixed with positioning assembly, one side of base is provided with mechanical arm, welding mechanism is installed on the mechanical arm, and the operating end of welding mechanism is located directly above the region between two sliding seats.

Description

Technical Field

[0001] This invention relates to the field of automotive parts welding technology, specifically a welding workbench for non-circular automotive tubular parts. Background Technology

[0002] In the automotive manufacturing industry, in order to meet certain specific needs, such as saving space, increasing rigidity, facilitating installation, and achieving specific shapes, there are many non-circular tubular components in automobiles. For example, the muffler pipe of an automobile is usually designed to be elliptical.

[0003] Traditional welding methods often suffer from the following problems when welding elliptical pipes:

[0004] Traditional clamps cannot adaptively adjust to the specifications and models of pipe fittings, requiring repeated manual adjustments during clamping, resulting in low clamping and welding efficiency.

[0005] Traditional clamps rely mainly on manual adjustment for positioning pipe fittings, which results in low alignment accuracy and may lead to welding misalignment, rendering the welded pipe fittings unusable and wasting resources.

[0006] Therefore, it is necessary to provide a welding worktable for non-circular automotive tubular parts to solve the problems mentioned in the background art. Summary of the Invention

[0007] To achieve the above objectives, the present invention provides the following technical solution: a welding workbench for non-circular automotive tubular parts, comprising a base, a slide block, a positioning component, a clamping mechanism, and a welding mechanism. The base has a sliding groove, in which two slide blocks are slidably arranged opposite each other. Each slide block is fixedly mounted with a telescopic rod (first type). The output end of each telescopic rod (first type) is fixedly mounted with a fixed disk. A support disk is fixedly mounted on the fixed disk. A turntable is rotatably mounted on the support disk. Four telescopic rods (second type) are evenly fixedly mounted circumferentially on the turntable. The telescopic direction of each telescopic rod (second type) is towards the radius of the turntable. A clamping mechanism is fixedly mounted at the output end of each telescopic rod (second type). A positioning component is vertically fixed to the side of the turntable away from the support disk. A robotic arm is provided on one side of the base. The welding mechanism is mounted on the robotic arm, and the operating end of the welding mechanism is located directly above the area between the two slide blocks.

[0008] Preferably, the positioning assembly includes a positioning shaft, a support rod, a rotating shaft, and a rotating cylinder mechanism. The positioning shaft is fixed to the turntable, and its outer surface is evenly provided with four drive slots along the circumference. The drive slots extend axially along the positioning shaft. Each drive slot is driven by a bidirectional reverse threaded screw to slide oppositely on a drive block. Each drive block is rotatably provided with a connecting rod. The other ends of two connecting rods are rotatably connected to the same support rod. Two spring support rods are fixedly mounted on the support rod. A rotating shaft is fixedly mounted between the two spring support rods. A rotating cylinder mechanism is rotatably mounted on the rotating shaft. A guide rod is obliquely fixedly mounted on the spring support rod near the end of the robotic arm.

[0009] Preferably, the rotating drum mechanism includes a drum body and rotating wheels, wherein the drum body is rotatably mounted on the rotating shaft, and multiple rotating wheels are rotatably mounted on the drum body. The multiple rotating wheels are distributed in a multi-line spiral array along the axial direction of the drum body, and the rotating wheels on each spiral array line are arranged in equal intervals along the circumference of the drum body.

[0010] Preferably, the pressing mechanism includes a pressing block, a slider, a rotating rod, and a pressing rod. The pressing block is an isosceles triangular plate structure, which is fixed to the output end of the telescopic rod. A vertical groove is formed on the pressing block along the height direction, and two horizontal grooves are symmetrically formed along the direction parallel to the base. A slider is slidably arranged in each of the vertical grooves and the two horizontal grooves. A rotating rod is fixedly mounted on each slider, and a pressing rod is rotatably arranged on the rotating rod.

[0011] Preferably, a hydraulic cylinder is fixedly mounted on the pressure block, and the output end of the hydraulic cylinder drives the slider in the vertical groove;

[0012] Furthermore, two adapter plates are rotatably mounted on the rotating rod in the vertical groove, and the other ends of the two adapter plates are rotatably connected to the rotating rods in the two horizontal grooves, respectively.

[0013] Preferably, the four bidirectional reverse threaded screws are divided into two groups of two, and the two groups of bidirectional reverse threaded screws are alternately distributed along the circumferential direction of the positioning shaft. The two groups of bidirectional reverse threaded screws protrude from both ends of the axial direction of the positioning shaft, and each protruding end of the bidirectional reverse threaded screw is fixedly equipped with a gear.

[0014] Drive plates are fixedly mounted at both ends of the positioning shaft. Each drive plate is equipped with a gear 2 driven by a motor 1. The axis of the gear 2 coincides with the axis of the positioning shaft. The two gear 2 gears respectively mesh with gear 1 gears on the two sets of bidirectional reverse threaded screws.

[0015] Preferably, the turntable has an annular groove with a T-shaped cross-section;

[0016] A T-shaped ring plate is fixedly connected to the support plate, and the ring plate is rotatably fitted into the ring groove. A second motor for driving the turntable to rotate is also fixedly installed on the support plate.

[0017] Compared with the prior art, the present invention provides a welding workbench for non-circular automotive tubular parts, which has the following advantages:

[0018] In this invention, a positioning component for adaptively adjusting and positioning pipe fittings is provided. The positioning component includes a rotating drum mechanism with a multi-line spiral array of wheels. This allows the rotating drum mechanism to roll in contact with the inner wall of the pipe fitting while the pipe fitting slides along the surface of the rotating drum mechanism. When the pipe fitting is misaligned, a spring support rod pushes the rotating drum mechanism to slide, thereby driving the pipe fitting to rotate and correct it to the preset major and minor axis directions, i.e., to the correct position. This achieves automatic pipe diameter calibration, avoiding manual intervention and ensuring more accurate positioning. Simultaneously, a three-bar clamping mechanism is provided. Three isosceles triangular support bars precisely clamp the pipe fitting at its apex and on both sides of the curved surface, further positioning and clamping the pipe diameter. This ensures accurate positioning of the pipe diameter, allowing two pipe fittings to be welded to be accurately aligned, effectively improving welding quality and efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the positioning component in this invention;

[0021] Figure 3 This is a schematic diagram of the positioning shaft in this invention;

[0022] Figure 4 This is a schematic diagram of the rotating drum mechanism in this invention;

[0023] Figure 5 This is a schematic diagram of the clamping mechanism in this invention;

[0024] Figure 6 This is a schematic diagram of the support disk structure in this invention;

[0025] Figure 7 This is a schematic diagram of the turntable structure in this invention;

[0026] In the diagram: 1. Base; 11. Slide groove; 2. Slide seat; 21. Telescopic rod one; 22. Fixed plate; 23. Support plate; 231. Ring plate; 24. Turntable; 241. Ring groove; 25. Telescopic rod two; 3. Positioning assembly; 31. Positioning shaft; 311. Drive groove; 312. Bidirectional reverse threaded screw; 313. Drive block; 314. Connecting rod; 315. Gear one; 316. Drive plate; 317. Gear two; 32. Support rod; 321. Spring support rod; 322. Guide rod; 33. Rotating shaft; 34. Rotating cylinder mechanism; 341. Cylinder body; 342. Rotating wheel; 4. Pressing mechanism; 41. Pressing block; 411. Vertical groove; 412. Horizontal groove; 413. Hydraulic cylinder; 42. Slider; 43. Rotating rod; 431. Adapter plate; 44. Pressing rod; 5. Welding mechanism. Detailed Implementation

[0027] Please see Figures 1 to 7 In this embodiment of the invention, a welding workbench for non-circular automotive tubular parts includes a base 1, a slide block 2, a positioning component 3, a clamping mechanism 4, and a welding mechanism 5. The base 1 has a sliding groove 11, in which two slide blocks 2 are slidably arranged opposite each other. Each slide block 2 is fixedly mounted with a telescopic rod 21. The output end of each telescopic rod 21 is fixedly mounted with a fixed disk 22. A support disk 23 is fixedly mounted on the fixed disk 22. A turntable 24 is rotatably mounted on the support disk 23. Four telescopic rods 25 are evenly fixedly mounted circumferentially on the turntable 24. The telescopic direction of each telescopic rod 25 is towards the radius of the turntable 24. The output end of each telescopic rod 25 is fixedly mounted with a clamping mechanism 4. The positioning component 3 is vertically fixedly mounted on the side of the turntable 24 away from the support disk 23. A robotic arm is provided on one side of the base 1, and the welding mechanism 5 is mounted on the robotic arm, with the operating end of the welding mechanism 5 located directly above the area between the two slide blocks 2.

[0028] It should be noted that both the first telescopic rod 21 and the second telescopic rod 25 are hydraulic telescopic rods. Both are provided with hydraulic pressure by an external hydraulic drive mechanism. The power for the slide block 2 to slide along the base 1 comes from an external drive mechanism, such as a hydraulic drive mechanism, a gear rack, or a ball screw.

[0029] In this embodiment, the positioning component 3 includes a positioning shaft 31, a support rod 32, a rotating shaft 33, and a rotating drum mechanism 34. The positioning shaft 31 is fixedly connected to the turntable 24, and four drive grooves 311 are evenly opened on its outer side along the circumference. The drive grooves 311 extend axially along the positioning shaft 31. Each drive groove 311 is driven by a bidirectional reverse thread screw 312 to slide oppositely on a drive block 313. Each drive block 313 is rotatably connected to a connecting rod 314. The other ends of two connecting rods 314 are rotatably connected to the same support rod 32. Two spring support rods 321 are fixedly mounted on the support rod 32. A rotating shaft 33 is fixedly mounted between the two spring support rods 321. The rotating drum mechanism 34 is rotatably mounted on the rotating shaft 33, and a guide rod 322 is obliquely fixedly mounted on the spring support rod 321 near the end of the robotic arm.

[0030] Furthermore, the four rotating drum mechanisms 34 correspond to the four pressing mechanisms 4, and they are all located in the long axis and short axis directions of the pipe fitting;

[0031] The four bidirectional reverse threaded screws 312 are divided into two groups of two, and the two groups of bidirectional reverse threaded screws 312 are alternately distributed along the circumferential direction of the positioning shaft 31. The two groups of bidirectional reverse threaded screws 312 protrude from both ends of the axial direction of the positioning shaft 31, and each protruding end of the bidirectional reverse threaded screws 312 is fixedly equipped with a gear 315.

[0032] Drive plates 316 are fixedly mounted on both ends of the positioning shaft 31. Each drive plate 316 is provided with a gear 317 driven to rotate by a motor. The axis of the gear 317 coincides with the axis of the positioning shaft 31. The two gears 317 mesh with gears 315 on the two sets of bidirectional reverse thread screws 312 respectively.

[0033] The turntable 24 has a T-shaped annular groove 241 on it;

[0034] A T-shaped ring plate 231 is fixedly connected to the support plate 23. The ring plate 231 is rotatably fitted into the ring groove 241. A second motor for driving the turntable 24 to rotate is also fixedly installed on the support plate 23.

[0035] In this embodiment, as Figure 4 The rotating drum mechanism 34 includes a drum body 341 and rotating wheels 342. The drum body 341 is rotatably mounted on the rotating shaft 33. Multiple rotating wheels 342 are rotatably mounted on the drum body 341. The multiple rotating wheels 342 are distributed in a multi-line spiral array along the axial direction of the drum body 341, and the rotating wheels 342 on each spiral array line are arranged in a circumferentially spaced manner along the circumference of the drum body 341.

[0036] In practice, the telescopic rod 21 is first extended or retracted according to the size of the pipe to be welded, raising or lowering the position of the positioning component 3 and the clamping mechanism 4, allowing the pipe to fit onto the positioning component 3. Simultaneously, the telescopic rod 25 is driven to slide, allowing the four clamping mechanisms 4 to enclose the pipe. Then, the motor drives the gear 317 to rotate, causing the two sets of bidirectional reverse threaded screws 312 to rotate. This causes the drive blocks 313 in the four drive slots 311 to slide, resulting in the deflection of the connecting rod 314 rotatably connected to the drive blocks 313 and driving the support rods 32 to slide. That is, the four support rods 32 open or retract in a cross shape, which corresponds precisely to the major and minor axes of the pipe. The movement of the corresponding support rod 32 can further drive the rotating drum mechanism 34 to move. At this time, the four support rods 32 are driven to move according to the length of the major axis and the length of the minor axis of the pipe, so that the distance between the two spaced rotating drum mechanisms 34 is greater than the length of the minor axis and the length of the major axis of the pipe, respectively. Then, the pipe is put onto the four rotating drum mechanisms 34. During this process, the pipe will first contact the four guide rods 322 and push them to slide. The sliding of the guide rods 322 further drives the rotating shaft 33 and the rotating drum mechanism 34 to move. At the same time, the spring support rod 321 will be compressed. When the pipe slides into the bearing range of the rotating drum mechanism 34, the rotating wheel 342 will contact the inner wall of the pipe and slide along its surface. The pipe fitting will be fitted onto the four rotating drum mechanisms 34 under the action of the rotating wheel 342. During this process, due to the supporting force of the spring support rod 321, it will push the rotating shaft 33 and the rotating drum mechanism 34 to expand outward to the maximum distance, that is, the four rotating drum mechanisms 34 will be pushed to the four vertices of the pipe fitting, that is, the points corresponding to the minor axis and the major axis. During this process, if the pipe fitting is in the upright position, then when the pipe fitting enters the receiving range of the four rotating drum mechanisms 34, the four rotating drum mechanisms 34 are already located at the four vertices of the pipe fitting. At this time, it is only necessary to push the pipe fitting to slide inward into the rotating drum mechanism 34 so that the rotating drum mechanism 34 completes the support of the pipe fitting. If the pipe fitting is not in the upright position, that is, there is a deviation between the four rotating drum mechanisms 34 and the four vertices of the pipe fitting, then the four rotating drum mechanisms 34 will be pushed outward to the four vertices of the pipe fitting. The rotating drum mechanism 34 is not at its maximum expansion distance due to the constraint of the pipe. Therefore, during the sliding of the pipe into the rotating drum mechanism 34, the rotating drum mechanism 34 applies a pushing force to the pipe. Since the rotating wheels 342 are distributed in a multi-line spiral array along the axial direction of the cylinder 341, and the rotating wheels 342 on each spiral array line are arranged at equal intervals around the circumference of the cylinder 341, the pipe support cylinder composed of multiple rotating wheels 342 can rotate along the inner wall of the pipe. That is, while the rotating wheels 342 rotate along the inner wall of the pipe, multiple rotating wheels 342 can also provide alternating support to the pipe without any interruption. Therefore, when the pipe is not in the upright position, the four rotating drum mechanisms 34 will push the pipe to rotate, thereby pushing the pipe to the upright position.This allows for accurate positioning of the pipe fittings. The telescopic rod 25 is then retracted, causing the four clamping mechanisms 4 to press against the outer surface of the pipe fitting, thus securing it firmly. Once both pipe fittings to be welded are clamped, the two sliding blocks 2 are driven to slide, ensuring accurate alignment. The welding mechanism 5, controlled by a robotic arm, then welds the pipe fittings. During welding, the turntable 24 is driven to rotate by motor 2, which in turn rotates the positioning assembly 3, the clamping mechanisms 4, and the pipe fittings, thus completing the automatic welding process. The welded pipe fittings are not misaligned, effectively improving welding quality and efficiency.

[0037] In this embodiment, as Figure 5 The pressing mechanism 4 includes a pressing block 41, a slider 42, a rotating rod 43, and a pressing rod 44. The pressing block 41 is an isosceles triangular plate structure, which is fixed to the output end of the telescopic rod 25. A vertical groove 411 is opened on the pressing block 41 along the height direction, and two horizontal grooves 412 are symmetrically opened along the parallel direction of the bottom edge. A slider 42 is slidably arranged in the vertical groove 411 and the two horizontal grooves 412. A rotating rod 43 is fixedly installed on each slider 42, and a pressing rod 44 is rotatably arranged on the rotating rod 43.

[0038] A hydraulic cylinder 413 is fixedly mounted on the pressure block 41, and the output end of the hydraulic cylinder 413 drives the slider 42 in the vertical groove 411.

[0039] Furthermore, two adapter plates 431 are rotatably mounted on the rotating rod 43 in the vertical groove 411, and the other ends of the two adapter plates 431 are respectively rotatably connected to the rotating rod 43 in the two horizontal grooves 412.

[0040] During implementation, the four telescopic rods 25 are retracted, causing the four clamping mechanisms 4 to press against the outside of the pipe fitting. During this process, the pressure rods 44 in the two transverse grooves 412 first contact the outer surface of the pipe fitting, and then the telescopic rods 25 continue to retract. Simultaneously, the hydraulic cylinder 413 drives the slider 42 in the vertical groove 411 to slide towards the side closer to the pipe fitting. The sliding of the slider 42 causes the pressure rods 44 in the vertical groove 411 to slide. At the same time, the rotating rods 43 and pressure rods 44 in the two transverse grooves 412 slide towards both sides of the pressure block 41 under the action of the two adapter plates 431. During this process, the pressure rods 44 in the two transverse grooves 412 remain in contact with the outer surface of the pipe fitting and slide along... As the pipe surface rolls, when the pressure rod 44 in the vertical groove 411 presses onto the pipe, all three pressure rods 44 are pressed onto the pipe. At this time, since the pipe is already in the upright position under the action of the positioning component 3 before pressing, the pressure rod 44 in the vertical groove 411 of the four pressure blocks 41 will press onto the four vertices of the pipe. At the same time, the pressure rods 44 in the two horizontal grooves 412 that cooperate with it will symmetrically press onto the two sides of the vertices of the pipe, thereby achieving further positioning and clamping of the pipe, ensuring stable clamping of the pipe. For pipes of different specifications, the slider 42 in the vertical groove 411 can be driven to slide, so that the three pressure rods 44 are in different positions, that is, adaptively adjusted according to the specifications of the pipe.

[0041] For ease of understanding, the change in pipe fitting specifications can be seen as the change in the arc-shaped edges at the four vertices of the pipe fitting. Consider this arc-shaped surface as an arc line, and the three pressure rods 44 on the same pressure block 41 are three points on this arc line, with one point coinciding with the vertex of the arc. At the same time, the three points form an isosceles triangle, and the length of the legs of this triangle is fixed, which means the length of the adapter plate 431 is fixed. Therefore, no matter how this arc line changes, that is, how the pipe fitting specifications change, we can always locate these three points on this arc line, so that the three pressure rods 44 can always fit on the pipe diameter and stably clamp the pipe fitting, regardless of the change in pipe fitting specifications.

[0042] In summary, this invention, when implemented, includes a positioning component 3 for adaptively adjusting and positioning pipe fittings. The positioning component 3 includes a rotating drum mechanism 34, which contains a multi-line spiral array wheel 342. This allows the rotating drum mechanism 34 to roll against the inner wall of the pipe fitting while the pipe fitting slides along the surface of the rotating drum mechanism 34. When the pipe fitting is misaligned, the spring support rod 321 pushes the rotating drum mechanism 34 to slide, thereby driving the pipe fitting to rotate and correct it to the preset major and minor axis directions, i.e., to the positive position. This achieves automatic pipe diameter calibration, avoiding manual intervention and ensuring more accurate positioning. Simultaneously, a three-bar clamping mechanism 4 is provided, using three isosceles triangular support rods 44 to precisely clamp the pipe fitting at its apex and on both sides of the curved surface, further positioning and clamping the pipe diameter. This ensures accurate pipe diameter positioning, allowing two pipe fittings to be welded to be accurately aligned, effectively improving welding quality and efficiency.

[0043] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A welding station for non-circular automotive tubing, characterized by: It include base (1), slide (2), positioning assembly (3), compression mechanism (4) and welding mechanism (5), wherein the base (1) is provided with a chute (11), the chute (11) is provided with two slide (2), each slide (2) is provided with a telescopic rod (21), the output end of the telescopic rod (21) is provided with a fixed disc (22), the fixed disc (22) is provided with a support disc (23), the support disc (23) is provided with a rotating disc (24), the rotating disc (24) is provided with four telescopic rod (25), the telescopic rod (25) is provided with a compression mechanism (4), the rotating disc (24) is provided with a positioning assembly (3), the base (1) is provided with a mechanical arm, the welding mechanism (5) is installed on the mechanical arm, and the operation end of the welding mechanism (5) is located above the two slide (2) region; The positioning assembly (3) includes positioning shaft (31), support rod (32), shaft (33) and rotating drum mechanism (34), wherein the positioning shaft (31) is fixedly connected to the rotating disc (24), the outer side is provided with four drive grooves (311) along the circumference, the drive grooves (311) extend along the positioning shaft (31) axially, each drive groove (311) is provided with a drive block (313) through a bidirectional reverse screw (312) drive opposite sliding, each drive block (313) is provided with a connecting rod (314), two connecting rods (314) are rotatably connected to the same support rod (32), the support rod (32) is provided with two spring support rods (321), two spring support rods (321) are provided with a rotating shaft (33), the rotating shaft (33) is provided with a rotating drum mechanism (34), and the spring support rod (321) close to the mechanical arm is provided with a guide rod (322); Four bidirectional reverse screw (312) two for a group are divided into two groups, and two groups of bidirectional reverse screw (312) are alternately distributed along the circumferential direction of the positioning shaft (31), two groups of bidirectional reverse screw (312) protrude from the axial direction of the positioning shaft (31), and the protruding end of each group of bidirectional reverse screw (312) is provided with a gear one (315); The axial direction of the positioning shaft (31) is provided with a drive plate (316), each drive plate (316) is provided with a gear two (317) driven by a motor one, and the axis of the gear two (317) coincides with the axis of the positioning shaft (31), two gears two (317) are engaged with two groups of gear one (315) on the bidirectional reverse screw (312).

2. The automobile non-circular pipe welding workbench according to claim 1, characterized in that: The rotating drum mechanism (34) comprises a drum body (341) and rotating wheels (342), wherein the drum body (341) is arranged on the rotating shaft (33) in rotation, a plurality of rotating wheels (342) are arranged on the drum body (341) in rotation, the rotating wheels (342) on each spiral array line are arranged in equal intervals in the circumferential direction of the drum body (341).

3. The automobile non-circular pipe welding workbench according to claim 1, characterized in that: The pressing mechanism (4) comprises a pressing block (41), a sliding block (42), a rotating rod (43) and a pressing rod (44), wherein the pressing block (41) is an isosceles triangular plate structure, which is fixedly connected to the output end of the second telescopic rod (25), a vertical groove (411) is formed in the height direction on the pressing block (41), and two horizontal grooves (412) are symmetrically formed in the parallel direction of the bottom edge, a sliding block (42) is slidably arranged in the vertical groove (411) and the two horizontal grooves (412), a rotating rod (43) is fixedly arranged on each sliding block (42), and a pressing rod (44) is rotatably arranged on the rotating rod (43).

4. The automobile non-circular pipe welding workbench according to claim 3, characterized in that: A hydraulic cylinder (413) is fixedly arranged on the pressing block (41), and the output end of the hydraulic cylinder (413) is drivingly connected to the sliding block (42) in the vertical groove (411); Two adapter plates (431) are rotatably arranged on the rotating rod (43) in the vertical groove (411), and the other ends of the two adapter plates (431) are rotatably connected to the rotating rods (43) in the two horizontal grooves (412).

5. The non-circular tube welding station of claim 1, wherein: A ring groove (241) with a T-shaped cross section is formed in the rotating disc (24); A ring plate (231) with a T-shaped cross section is fixedly connected to the supporting disc (23), the ring plate (231) is rotatably embedded in the ring groove (241), and a second motor for driving the rotating disc (24) to rotate is fixedly arranged on the supporting disc (23).

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