Welding equipment for automobile parts processing

Abstract

The present invention provides a welding device for processing automobile parts, which belongs to the technical field of welding equipment. The invention includes a base, a first tube body and a second tube body. The base is provided with a welding robot, a cutting table, a drive box and a support box, and also includes: a positioning vibration component, a leakage detection component; the annular airbag expands and fits from the inner wall, adaptively compensates for the pipe diameter tolerance, and pushes the end face to fit tightly, thereby improving the welding quality; when the positioning cylinder rotates, the guide block and the ball cooperate to generate periodic vibration, causing micro-plastic deformation of the weld metal, offsetting the welding thermal stress, and ensuring the structural sealing and durability; the airbag continuously provides uniform radial support, resists thermal deformation of the pipe fitting, and ensures dimensional accuracy after welding; the valve structure automatically switches between inflation and detection functions, without the need for manual tube replacement, and greatly improves detection efficiency; environmentally friendly coloring gas passes through the airbag to construct an independent detection area, and a red mark is formed at the leakage point, which supports naked eye or camera identification, thereby reducing technical barriers and costs.

Description

Technical Field

[0001] The present invention relates to the technical field of welding equipment, and in particular to welding equipment for processing automobile parts. Background Art

[0002] The automotive engine exhaust system is a core component for pollutant control and noise management. Its performance directly impacts the vehicle's compliance with environmental standards and driving comfort. The system primarily consists of the exhaust manifold, exhaust pipe, and muffler. The three-way catalytic converter, a key device for reducing emissions of harmful gases such as nitrogen oxides and hydrocarbons, is also integrated into the piping system. Each component is connected through welding, and the quality of the welds plays a decisive role in the system's sealing, structural strength, and durability.

[0003] Existing welding equipment mainly relies on external clamps or support structures to position automobile exhaust pipes. It lacks direct support for the joints of pipe fittings. The thermal stress generated by high temperature during welding can easily lead to local deformation of the weld, causing defects such as misalignment and undercutting in the weld. Moreover, most existing equipment lacks a real-time welding stress elimination mechanism. Residual stress acts on the weld and heat-affected zone for a long time, significantly reducing the structural strength of the weld and affecting the durability of the exhaust system. Under long-term vibration and high-temperature alternating working conditions of the vehicle, stress concentration points are very likely to initiate cracks, causing exhaust pipe leakage, seriously affecting the sealing and durability of the exhaust system.

[0004] How to invent a welding device for automobile parts processing to solve these problems has become an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] In order to make up for the above shortcomings, the present invention provides a welding device for processing automobile parts, which aims to solve the problems mentioned in the above background.

[0006] The present invention is achieved in that:

[0007] The present invention provides a welding device for processing automobile parts, comprising a base, a first tube body, and a second tube body. The base is provided with a welding robot, a cutting table, a drive box, and a support box. A reducer is installed in the drive box. The output end of the reducer is fixedly connected to a drive disk. The end of the drive disk is installed with a clamping mechanism for positioning the first tube body. A cylinder is provided on one side of the support box. The cylinder is fixed in the support box by a fixing member. The output end of the cylinder is fixedly connected to a connecting seat. The device further comprises:

[0008] Positioning vibration component: the positioning vibration component is arranged on one side of the connecting seat;

[0009] Air leakage detection component: The air leakage detection component is arranged inside the positioning vibration component.

[0010] Preferably, the ports of tube body 1 and tube body 2 are set to the same specifications, the drive disk and the cylinder are set coaxially, tube body 1 passes through the inside of the drive disk and is fixed by a clamping mechanism, and the end of tube body 2 is against the side wall of the connecting seat.

[0011] The cam is connected to the airbag via a channel which is connected to the airbag and the airbag is connected to the airbag via a channel which is connected to the airbag.

[0012] Preferably, the limiting mechanism includes a limiting ring 1 and a limiting ring 2 connected by bolts, the limiting ring 1 is fixed to the connecting seat by bolts, the outer diameter of the limiting mechanism matches the inner diameter of the second port of the tube body, and the diameter of the positioning cylinder is smaller than the inner diameter of the port of the tube body 1.

[0013] Preferably, two air guide grooves are provided inside the positioning cylinder, and both of the air guide grooves are distributed on the outside of the connecting pipe. One air guide groove corresponds to the dispersion channel, and the other air guide groove corresponds to the valve structure. The dispersion channel close to the valve structure is connected to the corresponding air guide channel through the air guide groove.

[0014] Preferably, the outer side wall of the connecting tube located in the accommodating cavity is fixedly connected with a guide block, and a limiting cavity is opened inside the positioning cylinder corresponding to the guide block, and a movable column is slidingly arranged inside the limiting cavity, and a spring is fixedly connected inside the limiting cavity, and the top of the movable column is fixedly connected to the end of the spring, and the top of the movable column is fixedly connected to a cylinder, and the end of the cylinder passes through the outer side wall of the positioning cylinder, and a micro electric push rod is fixedly installed inside the cylinder, and the end of the micro electric push rod is fixedly connected to a sphere.

[0015] Preferably, the guide block is arranged in a plum blossom shape with a gradual concave-convex shape, and a ball is rotatably clamped in the end of the movable column toward the guide block. The spherical surface of the ball is against the surface of the guide block. During welding, the sphere is directly opposite to the connection between tube body 1 and tube body 2. When the ball is at the convex point of the guide block, the spherical surface of the sphere is against the inner walls of tube body 1 and tube body 2.

[0016] Preferably, an air pressure sensor is installed on the side wall of the positioning cylinder corresponding to the annular airbag, and the air pressure sensor is electrically connected to the valve structure. The end of the air guide tube is connected to an external air pump through a hose, and the gas input by the air pump is colored gas.

[0017] Preferably, the air leakage detection component includes a side channel and an exhaust hole opened in the positioning cylinder, one end of the side channel is connected to the air guide groove close to the valve structure, and the other end passes through the side wall of the accommodating cavity, one end of the exhaust hole passes through the inner wall of the accommodating cavity, and the other end passes through the outer wall of the positioning cylinder, the valve structure is composed of a valve seat and a valve ball, the valve seat is fixed inside the connecting pipe, the interior of the valve ball and the side wall of the valve seat are provided with a through opening, the valve ball is also provided with an air guide port, and the air guide port is perpendicular to the through opening.

[0018] Preferably, when the through opening is perpendicular to the air guiding channel, the through opening is directly opposite to the air guiding groove; when the through opening is parallel to the air guiding channel, the air guiding opening is directly opposite to the air guiding groove.

[0019] The beneficial effects of the present invention are:

[0020] 1. The annular airbag is evenly expanded from the inside to fit the inner wall of the pipe body, and its elastic deformation is used to adapt to the inner diameter tolerance of the pipe fittings, forcibly correcting the pipe fittings at both ends to a very small coaxial error. At the same time, it promotes close fitting of the end faces, eliminates processing gaps, avoids defects such as misalignment, incomplete welding, weld nodules, and pores, ensures seamless welding of the welds, and lays the foundation for high-quality welding. When the positioning cylinder rotates, the periodic vibration is transmitted to the weld metal through the cooperation of the guide block and the ball, causing micro-plastic deformation, effectively offsetting the welding thermal stress, avoiding cold cracks and hot cracks caused by stress concentration, reducing the risk of leakage and fracture caused by cracks during use, and ensuring structural integrity.

[0021] 2. The airbag continuously provides uniform radial support force during the welding process, resisting thermal deformation caused by high-temperature expansion and cooling contraction of the pipe fittings, limiting free expansion and contraction, and ensuring dimensional accuracy after welding; at the same time, it prevents the exhaust pipe fittings from being displaced due to vibration or external force, ensures the position of the weld is fixed, and enables the welding parameters to act accurately at the predetermined position, thereby improving the stability and repeatability of the welding process; the uniform support force of the annular airbags on both sides alleviates the problem of local stress concentration near the weld, making the mechanical properties of the weld joint more balanced, improving the tensile and fatigue resistance of the weld, and extending the service life of the product.

[0022] 3. The valve structure automatically switches between the inflation support and leakage detection functions through the rotation of the valve ball. There is no need for manual tube replacement. The exhaust pipe can be tested for gas leaks after welding is completed, which greatly improves the detection efficiency. Environmentally friendly coloring gas is used, and the physical partition formed by the airbag on both sides of the weld is used to build an independent closed detection area. The leaked gas can only overflow through the weld gap, forming a clear red mark on the white or light-colored tube body. It supports direct observation with the naked eye or capture by an external camera, reducing the detection threshold and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic structural diagram of the limiting mechanism of the present invention;

[0026] Figure 3 It is a front cross-sectional structural schematic diagram of the present invention;

[0027] Figure 4 The present invention Figure 3 A in the middle is an enlarged structural diagram;

[0028] Figure 5 It is a schematic diagram of the cross-sectional structure of the tube body 1 and the tube body 2 of the present invention;

[0029] Figure 6 The present invention Figure 5 The enlarged structural diagram at B in the middle;

[0030] Figure 7 This is a schematic structural diagram of the valve structure of the present invention when it is open;

[0031] Figure 8 This is a schematic structural diagram of the valve structure of the present invention when it is closed;

[0032] Figure 9 The present invention Figure 8 The enlarged structural diagram at C in the middle;

[0033] Figure 10 1 is a schematic diagram of the cross-sectional structure of the accommodating cavity of the present invention;

[0034] Figure 11 The present invention Figure 10 The enlarged structural diagram at D in the middle;

[0035] Figure 12 Is a schematic structural diagram of the present invention when the sphere and the inner wall of the tube body abut against each other;

[0036] Figure 13 It is a schematic diagram of the side channel structure of the present invention.

[0037] In the figure: 1. Base; 2. Tube 1; 3. Cylinder; 4. Limiting ring 1; 5. Positioning cylinder; 6. Accommodating cavity; 7. Guide block; 8. Annular airbag; 9. Valve structure; 10. Welding robot; 11. Cutting table; 12. Drive box; 13. Support box; 21. Tube 2; 30. Fixing piece; 31. Connecting seat; 32. Connecting pipe; 33. Air guide pipe; 41. Limiting ring 2; 61. Limiting cavity; 62. Exhaust hole; 63. Movable column; 64. Micro electric push rod; 65. Spring; 81. Air pressure sensor; 90. Valve seat; 91. Valve ball; 92. Side channel; 121. Reducer; 122. Drive disk; 123. Clamping mechanism; 321. Air guide channel; 322. Dispersion channel; 323. Air guide groove; 630. Ball; 631. Cylinder; 641. Sphere; 911. Through port; 912. Air guide port. DETAILED DESCRIPTION

[0038] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0039] Example 1, refer to Figures 1-9 A welding device for processing automobile parts includes a base 1, a pipe body 2, and a pipe body 21. The pipe body 2 and the pipe body 21 are the main components of the automobile exhaust pipe. The base 1 is provided with a welding robot 10, a cutting table 11, a drive box 12, and a support box 13. A reducer 121 is installed in the drive box 12. The output end of the reducer 121 is fixedly connected to a drive disk 122. The end of the drive disk 122 is equipped with a clamping mechanism 123 for positioning the pipe body 2. A cylinder 3 is provided on one side of the support box 13. The cylinder 3 is fixed in the support box 13 by a fixing member 30. The output end of the cylinder 3 is fixedly connected to a connecting seat 31. The connecting seat 31 can be controlled to move by the cylinder 3. The device also includes:

[0040] Positioning vibration component: The positioning vibration component is set on one side of the connecting seat 31, which can position the tube body 1 2 and the tube body 2 21 from the inside, and can also generate vibration during the welding process to eliminate the stress generated during welding;

[0041] Leakage detection component: The leakage detection component is set inside the positioning vibration component. In conjunction with the positioning vibration component, it can detect leakage of the weld from inside the exhaust pipe.

[0042] Furthermore, the ports of tube body 1 2 and tube body 2 21 are set to the same specifications, and the drive disk 122 is set coaxially with the cylinder 3 to ensure that tube body 1 2 and tube body 2 21 can be aligned. Tube body 1 2 passes through the interior of the drive disk 122 and is fixed by the clamping mechanism 123. After welding is completed, the entire weldment can be removed from the other side. The end of tube body 2 21 is abutted against the side wall of the connecting seat 31, and the movement of tube body 2 21 can be controlled by the movement of the connecting seat 31.

[0043] The positioning vibration assembly includes a connecting tube 32, a positioning cylinder 5 and a limiting mechanism arranged on one side of the connecting seat 31. The connecting tube 32 is fixedly connected to the connecting seat 31. One end of the positioning cylinder 5 is rotatably clamped inside the limiting mechanism and can rotate freely. The outside of the connecting seat 31 is connected to an air guide pipe 33. The interior of the positioning cylinder 5, the connecting seat 31 and the connecting tube 32 is provided with an air guide channel 321. The end of the air guide channel 321 passes through the side wall of the connecting tube 32 and extends to the interior of the positioning cylinder 5 and the connecting seat 31 respectively. The end of the air guide channel 321 is connected to the air guide pipe 33.

[0044] Two annular airbags 8 are installed on the outside of the positioning cylinder 5. An accommodating chamber 6 is provided in the positioning cylinder 5 located between the two annular airbags 8. The end of the connecting pipe 32 is against the inner wall of the accommodating chamber 6 to ensure that the gas does not leak from the gap. A dispersion channel 322 is provided inside the positioning cylinder 5 corresponding to the annular airbag 8. One end of the dispersion channel 322 is connected to the inner cavity of the corresponding annular airbag 8 and the other end is connected to the air guide channel 321. A valve structure 9 is provided inside the air guide channel 321. The valve structure 9 is located in the front section of the air guide channel 321 and the annular airbag 8. The airbag 8 is located in the rear section of the air guide channel 321. The opening and closing of the valve structure 9 can control the inflation and deflation of the airbag. When the annular airbag 8 is inflated, the two airbags will respectively press against the inner walls of the tube body 1 2 and the tube body 2 21, thereby fixing the tube body 1 2 and the tube body 2 21 from the inside. When the tube body 1 2 rotates driven by the reducer 121, the positioning cylinder 5 and the tube body 2 21 can be driven to rotate synchronously under the action of the airbag and the inner walls of the tube body 1 2 and the tube body 2 21. In conjunction with the welding robot 10, the welding process of the tube body 1 2 and the tube body 2 21 can be realized.

[0045] It should be noted that the limiting mechanism includes a limiting ring 1 4 and a limiting ring 2 41 connected by bolts. The limiting ring 1 4 is fixed to the connecting seat 31 by bolts to facilitate its disassembly and assembly. The outer diameter of the limiting mechanism matches the inner diameter of the port of the tube body 2 21. Different limiting mechanisms can be replaced according to the specifications of the automobile exhaust pipe. The diameter of the positioning cylinder 5 is smaller than the inner diameter of the port of the tube body 1 2 to facilitate insertion and positioning.

[0046] Furthermore, two air guide grooves 323 are provided inside the positioning cylinder 5, and the two air guide grooves 323 are distributed on the outside of the connecting tube 32. One air guide groove 323 is provided corresponding to the dispersion channel 322, and the other air guide groove 323 is provided corresponding to the valve structure 9. The dispersion channel 322 close to the valve structure 9 is connected to the corresponding air guide channel 321 through the air guide groove 323. Through the setting of the air guide groove 323, even when the positioning cylinder 5 rotates around the connecting tube 32, the gas can still be directionally distributed through the air guide groove 323.

[0047] The outer wall of the connecting tube 32 located in the accommodating cavity 6 is fixedly connected with a guide block 7, and a limiting cavity 61 is opened inside the positioning cylinder 5 corresponding to the guide block 7. A movable column 63 is slidingly arranged inside the limiting cavity 61, and a spring 65 is fixedly connected inside the limiting cavity 61. The top of the movable column 63 is fixedly connected to the end of the spring 65, and the top of the movable column 63 is fixedly connected to the cylinder 631. The end of the cylinder 631 passes through the outer wall of the positioning cylinder 5, and a micro electric push rod 64 is fixedly installed inside the cylinder 631. The end of the micro electric push rod 64 is fixedly connected to the ball 641.

[0048] The guide block 7 is provided with a plum blossom shape with a gradual change of concave and convex. A ball 630 is rotatably engaged in the end of the movable column 63 facing the guide block 7. The spherical surface of the ball 630 abuts against the surface of the guide block 7. When the positioning cylinder 5 rotates around the connecting tube 32, the ball 630 moves along the surface of the guide block 7. When passing through the concave and convex points of the guide block 7, the ball 630 drives the movable column 63 to move up and down periodically, thereby driving the ball 641 to knock on the inner walls of the tube body 1 2 and the tube body 2 21 to eliminate the stress generated during welding. During welding, the ball 641 is directly opposite to the connection between the tube body 1 2 and the tube body 2 21, ensuring that this part of the vibration can be effectively transmitted to the welding area. When the ball 630 is at the convex point of the guide block 7, the spherical surface of the ball 641 abuts against the inner walls of the tube body 1 2 and the tube body 2 21, ensuring that vibration can be generated. By controlling the extension amount of the micro electric push rod 64, exhaust pipes of different specifications can be processed.

[0049] Furthermore, a pressure sensor 81 is installed on the side wall of the positioning cylinder 5 corresponding to the annular airbag 8. The pressure sensor 81 is electrically connected to the valve structure 9. The pressure inside the annular airbag 8 can be monitored by the pressure sensor 81 to ensure that the tube body 1 2 and the tube body 2 21 can be effectively supported. When the pressure reaches a certain level, the valve structure 9 can be controlled to close (refer to Figure 8-Figure 9 ), to ensure the stability of the internal air pressure of the annular airbag 8, the end of the air guide tube 33 is connected to the external air pump through a hose, and the annular airbag 8 can be inflated and deflated by the air pump.

[0050] In this embodiment, before welding, tube body 12 is passed through the drive disk 122 and fixed by the clamping mechanism 123. The end of tube body 21 abuts against the connecting seat 31, and the cylinder 3 pushes the connecting seat 31 forward, so that the positioning cylinder 5 is inserted into tube body 2 21, and the docking of tube body 1 2 and tube body 2 21 is realized. At this time, one annular airbag 8 enters tube body 1 2, and the other is in tube body 2 21, and the guide block 7 is at the connection between tube body 1 2 and tube body 2 21; the external air pump supplies air to the air guide channel 321 through the air guide tube 33. When the valve structure 9 is opened, the gas enters the annular airbag 8 through the dispersion channel 322, causing it to expand and adhere to the inner wall of the tube body. The air pressure sensor 81 monitors the airbag pressure in real time. When the set value is reached, the feedback signal controls the valve structure 9 to close, ensuring that the airbag stably clamps the exhaust pipe to avoid displacement during welding.

[0051] The reducer 121 drives the driving disc 122 to rotate, driving the tube body 2 to rotate. Since the annular airbag 8 is in close contact with the inner wall of the tube body, the friction force drives the positioning cylinder 5 and the tube body 2 21 to rotate synchronously. The welding robot 10 starts, aligns with the joint between the tube body 1 2 and the tube body 2 21, and prepares for welding.

[0052] When the positioning cylinder 5 rotates, the ball 630 rolls along the concave and convex gradient plum blossom-shaped surface of the guide block 7. When the ball 630 passes through the convex part, it overcomes the resistance of the spring 65 and pushes the movable column 63 upward, driving the ball 641 to press the inner wall of the tube body; when passing through the concave part, the spring 65 resets and causes the ball 641 to fall back. This process forms a periodic vibration with a frequency related to the rotation speed of the positioning cylinder 5. The periodic vibration transmitted by the ball 641 causes the weld metal to produce micro-plastic deformation, offsetting the welding thermal stress, which can effectively avoid cold cracks and hot cracks caused by stress concentration, reduce the risk of leakage and breakage of the exhaust pipe due to cracks during use, and ensure its structural integrity; the micro electric push rod 64 can adjust the extension length of the ball 641 to adapt to exhaust pipes of different diameters, ensuring that the ball 641 can contact the pipe wall and transmit vibration.

[0053] When welding pipes such as automobile exhaust pipes, it is necessary to ensure that the pipes at both ends of the weld are precisely coaxial, otherwise defects such as misalignment and incomplete welding are likely to occur; after the airbag is inflated from the inside, it will evenly fit the inner wall of the pipe, and use the elastic deformation of the airbag to adaptively fill the inner diameter tolerance of the pipe, forcibly correcting the pipes at both ends to a coaxial state, so that the coaxiality error of the pipe docking is controlled within an extremely small range. Compared with traditional positioning methods, it greatly reduces welding quality problems caused by insufficient coaxiality; at the same time, the radial pressure generated by the expansion of the airbag can push the end faces of the pipe to fit closely, eliminating the gap caused by the processing error of the pipe, ensuring seamless docking of the welding parts, providing a good foundation for welding, and avoiding defects such as weld nodules and air holes due to excessive gaps.

[0054] During the welding process, high temperature will cause the pipe to expand locally due to heat, and shrink and deform when cooling. In this case, the two ends of the weld are supported from the inside by airbags. The airbags provide uniform support force inside, which can effectively resist this thermal deformation, limit the free expansion and contraction of the pipe, and ensure the dimensional accuracy after welding; during the welding process of the welding robot 10, the airbags continue to provide stable support to prevent the pipe from being displaced due to welding vibration or external force, ensuring that the weld position is fixed during welding, so that welding parameters (such as welding current, speed, and angle) can be accurately applied to the predetermined position, improving the stability and repeatability of the welding process, and thus improving the consistency of welding quality; the uniform support force of the airbags makes the welding stress more evenly distributed on the pipe, avoiding local stress concentration. In traditional welding, due to unstable positioning or uneven support, stress concentration points are easily generated near the weld, which becomes a weak link in the structure; and the support of the annular airbags 8 on both sides of the weld can effectively alleviate this problem, making the mechanical properties of the weld joint more balanced, improving the tensile strength and fatigue resistance of the weld, and extending the service life of the product.

[0055] During the welding process, if the air pressure of the annular airbag 8 drops due to high temperature or slight leakage, the air pressure sensor 81 detects that the pressure is lower than the threshold, which triggers the valve structure 9 to open and replenish gas to maintain the clamping force to avoid welding misalignment due to airbag relaxation; by replacing the limiting mechanism with different outer diameters, it can adapt to exhaust pipes of various specifications.

[0056] Example 2, refer to Figure 3-Figure 13The air leakage detection component includes a side channel 92 and an exhaust hole 62 opened in the positioning cylinder 5. One end of the side channel 92 is connected to the air guide groove 323 near the valve structure 9, and the other end penetrates the side wall of the accommodating chamber 6. One end of the exhaust hole 62 penetrates the inner wall of the accommodating chamber 6, and the other end penetrates the outer wall of the positioning cylinder 5. The valve structure 9 is composed of a valve seat 90 and a valve ball 91. The valve seat 90 is fixed inside the connecting pipe 32. The interior of the valve ball 91 and the side wall of the valve seat 90 are provided with a through port 911. The valve ball 91 is also provided with an air guide port 912, which is perpendicular to the through port 911. The gas input by the air pump The medium is the colored gas (the colored gas can use a thermal atomization device to atomize the dye-propylene glycol solution into microparticles and mix it with dry nitrogen. Solvent Red 111 (environmentally friendly) is a red oil-soluble dye, dissolved in food-grade propylene glycol (boiling point 187°C), heated to 80°C to form a red aerosol, which is bright red after mixing with nitrogen. The dye uses environmentally friendly solvent Red 111, which is non-toxic and harmless after mixing with food-grade propylene glycol. It is suitable for components with high safety requirements such as automobile exhaust pipes; at the same time, by adjusting the atomization parameters, it can be adapted to the detection of pipes of different diameters and materials), which is convenient for observing weld leakage.

[0057] It should be noted that when the opening 911 is perpendicular to the air guide channel 321, the opening 911 is directly opposite to the air guide groove 323 (refer to Figure 13 ), at this time, the valve structure 9 is in a closed state, and the gas will enter the accommodating chamber 6 through the air guide port 912, the through port 911, the air guide groove 323 and the side channel 92 in sequence, and then be ejected through the exhaust hole 62 and enter the closed space formed by the inner wall of the tube body 1 2, the tube body 2 21 and the two annular air bags 8. When the weld leaks, this part of the gas will flow to the outside of the pipe through the gap. At this time, the staff or the external camera can effectively capture it. When the through port 911 is parallel to the air guide channel 321, the air guide port 912 is opposite to the air guide groove 323 (refer to Figure 7 ), at this time the valve structure 9 is in the open state, most of the gas will be replenished into the annular airbag 8, and only a small part will flow out through the air guide port 912.

[0058] In this embodiment, when the valve ball 91 rotates until the opening 911 is parallel to the air guide channel 321 (eg Figure 7 As shown in FIG5 ), the valve structure 9 is in the open state. At this time, the air guide port 912 is directly opposite to the air guide groove 323. Most of the colored gas (red aerosol mixed with nitrogen) output by the air pump enters the annular airbag 8 through the air guide channel 321 and the dispersion channel 322, causing it to expand and clamp the tube body; a small amount of gas is diverted through the air guide port 912 and the air guide groove 323 to maintain the air flow. Then the valve is closed and the valve ball 91 is rotated 90° so that the port 911 is perpendicular to the air guide channel 321 (as shown in FIG5 ). Figure 13As shown), at this time the valve is closed and gas cannot enter the annular airbag 8, ensuring that the internal air pressure of the annular airbag 8 is stable.

[0059] After welding is completed, ventilation continues. At this time, the gas can only flow into the accommodating cavity 6 through the air guide port 912, the through port 911, the air guide groove 323 and the side channel 92, and finally be ejected through the exhaust hole 62 to the closed space formed by the inner wall of the tube body 1 2, the tube body 2 21 and the annular airbag 8. When there are defects in the weld (such as cracks, pores), the colored aerosol gas will leak through the gap to the outside of the pipe. Since the gas contains red dye (solvent red 111), obvious red marks will be formed at the leakage point. The staff can observe directly with the naked eye or use an external camera to capture images to quickly locate the leakage point. After the detection is completed, the valve ball 91 returns to the open state, and the remaining gas can be directly extracted to avoid waste.

[0060] The two annular airbags 8 are inflated to fit the inner walls of the tube body 1 2 and the tube body 2 21 respectively, forming a physical partition on both sides of the weld on the inner wall of the pipe, isolating the weld area from other spaces inside and outside the pipe, and constructing an independent detection area. The colored gas in this area can only leak through the weld gap, avoiding misjudgment caused by gas escaping from other non-detection parts, providing a pure environment for detection, and making the detection results more targeted and accurate. The staff can intuitively observe the red marks with the naked eye, or use an external camera to accurately capture the leakage location, without the need for complex detection algorithms or equipment, reducing the detection threshold and cost.

[0061] The valve structure 9 realizes automatic switching of the inflation and detection functions through the rotation of the valve ball 91, without the need for manual replacement of pipelines, so that the inflation, clamping, welding and leakage detection of the annular airbag 8 form an integrated process. By using colored aerosol gas, obvious red marks appear at the leakage points of the welds, which supports naked eye observation and camera capture, reducing the threshold of detection technology and equipment costs; the two annular airbags 8 form a physical partition on both sides of the weld on the inner wall of the pipe, constructing an independent closed detection area, eliminating the interference of gas leakage from non-welds, ensuring that the detection results are true and reliable, and avoiding misjudgment.

[0062] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by a person skilled in the art. The provision of power is also common knowledge in the art. The present invention is mainly used to protect mechanical devices, so the control method and circuit connection are not explained in detail in the present invention.

[0063] It should be noted that the specific models and specifications of the cylinder 3, air pressure sensor 81, etc. need to be selected and determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0064] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A welding device for processing automobile parts, comprising a base (1), a tube body 1 (2) and a tube body 2 (21), wherein a welding robot (10), a cutting table (11), a drive box (12) and a support box (13) are provided on the base (1), a reducer (121) is installed in the drive box (12), an output end of the reducer (121) is fixedly connected to a drive disk (122), an end of the drive disk (122) is installed with a clamping mechanism (123) for positioning the tube body 1 (2), a cylinder (3) is provided on one side of the support box (13), the cylinder (3) is fixed in the support box (13) by a fixing member (30), and the output end of the cylinder (3) is fixedly connected to a connecting seat (31), characterized in that Also includes: Positioning vibration component: the positioning vibration component is arranged on one side of the connecting seat (31); The positioning vibration assembly comprises a connecting tube (32), a positioning cylinder (5) and a limiting mechanism provided on one side of the connecting seat (31); the connecting tube (32) is fixedly connected to the connecting seat (31); one end of the positioning cylinder (5) is rotatably engaged in the limiting mechanism; an air guide tube (33) is connected to the outside of the connecting seat (31); an air guide channel (321) is provided inside the positioning cylinder (5), the connecting seat (31) and the connecting tube (32); the end of the air guide channel (321) passes through the side wall of the connecting tube (32) and extends to the inside of the positioning cylinder (5) and the connecting seat (31), respectively; the end of the air guide channel (321) is connected to the air guide tube (33) are connected, two annular air bags (8) are installed on the outside of the positioning cylinder (5), and a receiving cavity (6) is provided in the positioning cylinder (5) located between the two annular air bags (8). The end of the connecting pipe (32) is against the inner wall of the receiving cavity (6), and a dispersion channel (322) is provided inside the positioning cylinder (5) corresponding to the annular air bag (8). One end of the dispersion channel (322) is connected to the inner cavity of the corresponding annular air bag (8), and the other end is connected to the air guide channel (321). A valve structure (9) is provided inside the air guide channel (321), and the valve structure (9) is located at the front section of the air guide channel (321). , the annular airbag (8) is located in the rear section of the air guide channel (321); the outer wall of the connecting tube (32) located in the accommodating cavity (6) is fixedly connected to a guide block (7), and a limiting cavity (61) is provided inside the positioning cylinder (5) corresponding to the guide block (7), and a movable column (63) is slidably provided inside the limiting cavity (61), and a spring (65) is fixedly connected inside the limiting cavity (61), and the top of the movable column (63) is fixedly connected to the end of the spring (65), and the top of the movable column (63) is fixedly connected to a cylinder (631), and the end of the cylinder (631) passes through the outer wall of the positioning cylinder (5), and the cylinder A micro electric push rod (64) is fixedly installed inside the body (631), and a sphere (641) is fixedly connected to the end of the micro electric push rod (64); the guide block (7) is arranged in a plum blossom shape with a concave-convex gradient, and a ball (630) is rotatably engaged with the end of the movable column (63) facing the guide block (7), and the spherical surface of the ball (630) is against the surface of the guide block (7). When welding, the sphere (641) is directly opposite to the connection between the tube body 1 (2) and the tube body 2 (21). When the ball (630) is at the convex point of the guide block (7), the spherical surface of the ball (641) is against the inner wall of the tube body 1 (2) and the tube body 2 (21); Air leakage detection component: The air leakage detection component is arranged inside the positioning vibration component.

2. The welding equipment for automobile parts processing according to claim 1, characterized in that: The ports of the tube body 1 (2) and the tube body 2 (21) are of the same specifications, the driving disc (122) and the cylinder (3) are coaxially arranged, the tube body 1 (2) passes through the interior of the driving disc (122) and is fixed by the clamping mechanism (123), and the end of the tube body 2 (21) abuts against the side wall of the connecting seat (31).

3. The welding equipment for automobile parts processing according to claim 1, characterized in that: The limiting mechanism comprises a limiting ring 1 (4) and a limiting ring 2 (41) connected by bolts, the limiting ring 1 (4) is fixed to the connecting seat (31) by bolts, the outer diameter of the limiting mechanism matches the inner diameter of the port of the second tube body (21), and the diameter of the positioning cylinder (5) is smaller than the inner diameter of the port of the first tube body (2).

4. The welding equipment for automobile parts processing according to claim 1, characterized in that: Two air guide grooves (323) are provided inside the positioning cylinder (5). Both of the air guide grooves (323) are distributed on the outside of the connecting pipe (32). One air guide groove (323) is provided corresponding to the dispersion channel (322), and the other air guide groove (323) is provided corresponding to the valve structure (9). The dispersion channel (322) close to the valve structure (9) is connected to the corresponding air guide channel (321) through the air guide groove (323).

5. The welding equipment for automobile parts processing according to claim 1, characterized in that: An air pressure sensor (81) is installed on the side wall of the positioning cylinder (5) corresponding to the annular airbag (8). The air pressure sensor (81) is electrically connected to the valve structure (9). The end of the air guide tube (33) is connected to an external air pump through a hose. The gas input by the air pump is colored gas.

6. The welding equipment for automobile parts processing according to claim 1, characterized in that: The air leakage detection component includes a side channel (92) and an exhaust hole (62) opened in the positioning cylinder (5), one end of the side channel (92) is connected to the air guide groove (323) near the valve structure (9), and the other end penetrates the side wall of the accommodating cavity (6), one end of the exhaust hole (62) penetrates the inner wall of the accommodating cavity (6), and the other end penetrates the outer wall of the positioning cylinder (5), the valve structure (9) is composed of a valve seat (90) and a valve ball (91), the valve seat (90) is fixed inside the connecting pipe (32), the interior of the valve ball (91) and the side wall of the valve seat (90) are provided with a through port (911), and the valve ball (91) is also provided with an air guide port (912), and the air guide port (912) is perpendicular to the through port (911).

7. The welding equipment for automobile parts processing according to claim 6, characterized in that: When the through opening (911) is perpendicular to the air guiding channel (321), the through opening (911) is directly opposite to the air guiding groove (323); when the through opening (911) is parallel to the air guiding channel (321), the air guiding opening (912) is directly opposite to the air guiding groove (323).

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